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* [Bug c++/89919] internal compiler error when building MKL-DNN
[not found] <bug-89919-4@http.gcc.gnu.org/bugzilla/>
@ 2019-04-02 8:21 ` marxin at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: marxin at gcc dot gnu.org @ 2019-04-02 8:21 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89919
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection,
| |needs-reduction
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-02
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm reducing that..
>From gcc-bugs-return-639309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 08:22:53 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89919] internal compiler error when building MKL-DNN
Date: Tue, 02 Apr 2019 08:22:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
@Roman: Do you have a GCC compiler that accepts the code and does not cause an
ICE?
>From gcc-bugs-return-639310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 08:32:20 2019
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From: "mark.eggleston at codethink dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/89920] New: do loop fails to complete
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89920
Bug ID: 89920
Summary: do loop fails to complete
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: mark.eggleston at codethink dot com
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>From gcc-bugs-return-639311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 08:41:40 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #19 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #18)
> Do you think it would be possible to get this fix before the 9.1 release
> (see the announcement by Richard B. yesterday/today)?
If someone can propose and test a complete patch (I suspect that the fragment
above needs to be guarded on c++) then post it to @patches for review.
I can try to test it out on some other system versions.
>From gcc-bugs-return-639312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 08:47:00 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89919] internal compiler error when building MKL-DNN
Date: Tue, 02 Apr 2019 08:47:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection, |
|needs-reduction |
CC| |jason at gcc dot gnu.org,
| |ppalka at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I have a reduced test-case:
$ cat pr89919.ii
typedef enum { a } b;
using c = b;
float d, e;
template <c> struct f {
typedef float g;
void h() const;
template <typename i>
void j(const int &, g *, float *, float *, const i *, const float *) const;
};
using k = f<a>;
template <>
template <typename i>
void k::j(const int &, g *, float *, float *, const i *, const float *) const;
template <>
template <typename i>
void k::j(const int &, g *, float *, float *, const i *, const float *) const {
int l([&] { l; });
}
template <c m> void f<m>::h() const {
int n;
g o;
j(n, &o, &d, &e, static_cast<char *>(0), 0);
}
template struct f<a>;
Rejected on trunk again in r268529, started to ICE in r249323.
>From gcc-bugs-return-639313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 08:49:45 2019
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Subject: [Bug fortran/89920] do loop fails to complete
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-02
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
What is the problem?
>From gcc-bugs-return-639314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 08:51:43 2019
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From: "mark.eggleston at codethink dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89920] do loop fails to complete
Date: Tue, 02 Apr 2019 08:51:00 -0000
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--- Comment #2 from MarkEggleston <mark.eggleston at codethink dot com> ---
Affects 7, 8 and trunk branches.
A do loop from 1 to the maximum value of an integer does not exit. The example
below has a check that forces the loop to exit.
program test
implicit none
integer(4) :: i
integer(4), parameter :: maximum = huge(i)
integer(4) :: count
logical :: wrap
count = 0
do i = 1,maximum
if (i.gt.0) then
count = count + 1
else
wrap = .true.
exit
endif
enddo
write(*,*) "count ", count
write(*,*) "wrap", wrap
end
When compiled with 6.3 the result is:
count 2147483647
wrap F
When compiled with compiler built using 7, 8 and trunk code on x86_64 the
result is:
count 2147483647
wrap T
Also occurs with integer(1) and integer(2) expect the same is true of
integer(8) and integer(16).
>From gcc-bugs-return-639315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 09:03:18 2019
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89914] [9 Regression] ICE in nothrow_spec_p, at cp/except.c:1238
Date: Tue, 02 Apr 2019 09:03:00 -0000
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
There are a couple of places in semantics.c where we call
maybe_instantiate_noexcept and then, without checking that it returns true, we
proceed to use TYPE_NOTHROW_P, which expands to nothrow_spec_p. I think we need
a fall-back, probably false, consistently with r269746. Doing that certainly
avoids this kind of ICE.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/89920] do loop fails to complete
Date: Tue, 02 Apr 2019 09:23:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Compiling the test with -Wundefined-do-loop (included in -Wall) gives
8 | do i = 1,maximum
| 1
Warning: DO loop at (1) is undefined as it overflows [-Wundefined-do-loop]
Although the present behavior is too pedantic for my taste, it has been
discussed
at length in the past and has settled to the present behavior.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/89915] clean up and canonicalize wording in params.def
Date: Tue, 02 Apr 2019 09:25:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Roland Illig from comment #2)
> But then I remembered that "internal compiler errors" have also made their
> way into gcc.pot. I don't see any benefit in translating internal errors,
> therefore I have requested to remove these internal errors from the
> translation; see bug 80055. Nothing has happened on this topic in the last 2
> years.
>
> Therefore I guess this "internal" means the same as in "internal compiler
> error", and that everything internal should still be translated.
No. The fact a bug hasn't been fixed yet doesn't mean it's not a bug.
> There's a decision to make: either the internal stuff is really considered
> internal, in which case no translation is necessary and the text quality
> doesn't matter as well. Or, the word "internal" as used by the GCC project
> actually means "publicly visible" and therefore needs high-quality text.
I think internal means internal.
>From gcc-bugs-return-639318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 09:36:05 2019
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Subject: [Bug fortran/53940] Optionally warn about multiple explicit USE-association of the same symbol
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Hence, I am inclined to reject the warning proposal.
> (The request to print an error is simply invalid.)
I agree with this almost seven year old comment.
Note that the option -Wuse-without-only may help to detect
use mod
use mod, var2 => var
or
use mod
use mod
>From gcc-bugs-return-639319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 09:38:04 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/80055] do not mark internal compiler error messages for i18n
Date: Tue, 02 Apr 2019 09:38:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Frederic Marchal from comment #5)
> My opinion was that it would be rude to display an untranslated message to
> the user. But, to spare users some head scratching when faced with a message
> they are not supposed to understand, I suggested to clearly identify such
> messages as intended to the gcc development team.
So we agree that translating the "internal compiler error:" prefix is enough?
> If internal_error messages are already clearly identified as such, then all
> is well from my point of view but you may want to argue about how unlikely
> it is for a final user to ever see one internal_error.
It happens all the time (it shouldn't, but we have bugs).
>From gcc-bugs-return-639320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 09:41:58 2019
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Subject: [Bug translation/80055] do not mark internal compiler error messages for i18n
Date: Tue, 02 Apr 2019 09:41:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #4)
> I believe that everywhere we're using internal_error, the diagnostics
> machinery will add "internal compiler error: " as a prefix when the message
> is emitted to the user, and I believe this prefix is translated.
The avr backend uses the string "internal compiler error" in arguments to
fatal_insn, which won't be handle uniformly:
#: config/avr/avr.c:2939
msgid "internal compiler error. Bad address:"
msgstr ""
#: config/avr/avr.c:2980
msgid "internal compiler error. Unknown mode:"
msgstr ""
#: config/avr/avr.c:6387 config/avr/avr.c:6868 config/avr/avr.c:7283
msgid "internal compiler error. Incorrect shift:"
msgstr ""
I have no idea if those really are ICEs or if the string is inappropriate, but
those messages should probably all have a space after the colon.
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Subject: [Bug other/55930] libatomic build failure if configured with --disable-dependency-tracking
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Did the patch ever get sent to the gcc-patches list?
>From gcc-bugs-return-639322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 10:02:21 2019
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Subject: [Bug middle-end/89921] New: The dom pass does not respect size of an 'asm' when duplicating BBs
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Bug ID: 89921
Summary: The dom pass does not respect size of an 'asm' when
duplicating BBs
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// sizeof-asm-dom.c:
#define LARGE_ASM "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
\
"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
extern unsigned bar (void);
unsigned foo (unsigned v)
{
unsigned u;
unsigned o;
if (v > 10)
u = bar ();
asm (LARGE_ASM:"=g"(o)::); // a non-volatile asm.
if (v < 5)
return u;
return 0;
}
// EOF
gcc -O -fdump-tree-dom -c sizeof-asm-dom.c
grep asm sizeof-asm*dom2 | wc -l
This yields 2, i.e. the large asm has been duplicated.
My understanding (without having read the actual code of the dom pass) is that
the dom pass relies on a cost model to decide whether to perform the
duplication
(inserting a simple loop in place of the asm prevents it). Also, at some point
GCC computes an estimate of inline asm sizes based on the number of
instructions
they contain (as per "Size of an 'asm'" section of the manual). It seems, the
dom pass could use that information to avoid bloating the resulting code.
Is it just an unimplemented thing that needs fixing?
>From gcc-bugs-return-639323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 10:09:50 2019
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Subject: [Bug c++/83797] Inconsistent error messages for main
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2018-01-11 00:00:00 |2019-4-2
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
For the first example current trunk prints:
m.cc:1:1: error: cannot declare '::main' to be inline
1 | inline static constexpr short main() {
| ^~~~~~
m.cc:1:15: error: cannot declare '::main' to be 'constexpr'
1 | inline static constexpr short main() {
| ^~~~~~~~~
m.cc:1:31: error: cannot declare '::main' to be static
1 | inline static constexpr short main() {
| ^~~~
cc1plus: error: '::main' must return 'int'
The last error is missing a proper location.
For the second example there's no substantive change. It should say "::main"
not "main", and should say "no return type" not "no type", and the caret
location should highlight "main" not the closing paren.
I'll try to work on this for GCC 10 if nobody beats me to it.
>From gcc-bugs-return-639324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 10:19:16 2019
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83797
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Another related problem is that this should highlight the return type, not the
closing paren:
vm.cc:1:11: error: ‘::main’ must return ‘int’
void main() { }
^
>From gcc-bugs-return-639325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 10:20:36 2019
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Subject: [Bug c++/83797] Inconsistent error messages for main
Date: Tue, 02 Apr 2019 10:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83797
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> Another related problem is that this should highlight the return type, not
> the closing paren:
>
> vm.cc:1:11: error: ‘::main’ must return ‘int’
> void main() { }
> ^
FWIW the C front-end highlights the function name not the return type:
vm.c:1:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
void main() { }
^~~~
>From gcc-bugs-return-639326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 10:26:18 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
Date: Tue, 02 Apr 2019 10:26:00 -0000
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--- Comment #35 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Hi Steve,
Thanks for the patch and sorry for the delay! I don't think it was the
intention to discourage people. I have also pinged the AArch64 maintainers to
review it.
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Subject: [Bug translation/40883] [meta-bug] Translation breakage with trivial fixes
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Bug 40883 depends on bug 89912, which changed state.
Bug 89912 Summary: typo in params.def: scop
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89912
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Subject: [Bug translation/89912] typo in params.def: scop
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/89922] New: Loop on fixed size array is not unrolled and poorly optimized
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89922
Bug ID: 89922
Summary: Loop on fixed size array is not unrolled and poorly
optimized
Product: gcc
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Consider the example:
struct array {
int data[5];
};
array test(int i) {
array a = {1, i, 2, 3, 4};
for (int j = 0; j < 5; ++j) {
a.data[j] += j;
}
return a;
}
GCC-9 generates ~20 instructions with jmps.
Rewriting the same function with unrolled loop makes the assembly much better:
array test2(int i) {
array a = {1, i, 2, 3, 4};
a.data[0] += 0;
a.data[1] += 1;
a.data[2] += 2;
a.data[3] += 3;
a.data[4] += 4;
return a;
}
Assembly for `test2` takes only ~8 instructions:
test2(int):
add esi, 1
mov DWORD PTR [rdi], 1
mov rax, rdi
movabs rdx, 25769803780
mov DWORD PTR [rdi+4], esi
mov QWORD PTR [rdi+8], rdx
mov DWORD PTR [rdi+16], 8
ret
>From gcc-bugs-return-639330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 11:04:57 2019
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Subject: [Bug testsuite/89916] New test case gcc.dg/pr86928.c fails on 64 bit targets (r270061)
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--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Author: amonakov
Date: Tue Apr 2 11:04:22 2019
New Revision: 270087
URL: https://gcc.gnu.org/viewcvs?rev=270087&root=gcc&view=rev
Log:
testsuite: do not try to add -m32 (PR 89916)
PR testsuite/89916
* gcc.dg/pr86928.c: Do not attempt to add -m32.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/pr86928.c
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Subject: [Bug testsuite/89916] New test case gcc.dg/pr86928.c fails on 64 bit targets (r270061)
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/86928] ICE in compute_live, at sel-sched.c:3097
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86928
Bug 86928 depends on bug 89916, which changed state.
Bug 89916 Summary: New test case gcc.dg/pr86928.c fails on 64 bit targets (r270061)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89916
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----------------------------------------------------------------------------
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89923
Bug ID: 89923
Summary: printf format check and char8_t
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: drepper.fsp+rhbz at gmail dot com
Target Milestone: ---
With the introduction of char8_t there is a new error case in the printf format
checks:
#include <stdio.h>
int main() {
auto s = u8"hello world";
#pragma GCC diagnostic error "-Wformat"
printf("%s\n", s);
}
Compiling this with C++2a results to the following output:
$ g++ -c u.cc -std=gnu++2a
u.cc: In function ‘int main()’:
u.cc:6:12: error: format ‘%s’ expects argument of type ‘char*’, but argument 2
has type ‘const char8_t*’ [-Werror=format=]
6 | printf("%s\n", s);
| ~^ ~
| | |
| char* const char8_t*
| %hhn
I think char8_t* should be added to the allowed types for the %s parameter. It
is arguably more likely to succeed then a char* argument since the latters
encoding is determined by the compiler. At least with u8 strings the code can
make sure the locale used at runtime uses UTF-8.
>From gcc-bugs-return-639334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 11:48:39 2019
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Subject: [Bug fortran/89890] Memory leak from a function returning a subtype
Date: Tue, 02 Apr 2019 11:48:00 -0000
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Andrew Wood <andrew at fluidgravity dot co.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|DUPLICATE |---
--- Comment #3 from Andrew Wood <andrew at fluidgravity dot co.uk> ---
Do you mind if I re-open this?
I've tried building gcc/gfortran from commit 27c9936ed27 of the git repository
(git://gcc.gnu.org/git/gcc.git).
The memory leak in the test case I submitted appears to be fixed, but it
returns if I make some minor modifications to code.f90:
> gfortran --version
GNU Fortran (GCC) 9.0.1 20190331 (experimental)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> gfortran -g -O0 -std=f2008 code.f90
> valgrind --tool=memcheck --leak-check=yes --show-leak-kinds=definite ./a.out
==15359== Memcheck, a memory error detector
==15359== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==15359== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==15359== Command: ./a.out
==15359==
==15359==
==15359== HEAP SUMMARY:
==15359== in use at exit: 92 bytes in 2 blocks
==15359== total heap usage: 35 allocs, 33 frees, 13,999 bytes allocated
==15359==
==15359== 92 (88 direct, 4 indirect) bytes in 1 blocks are definitely lost in
loss record 2 of 2
==15359== at 0x4C2E01F: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==15359== by 0x40145C: __m_MOD_new (arrays.F90:19)
==15359== by 0x4016B0: MAIN__ (arrays.F90:35)
==15359== by 0x401939: main (arrays.F90:28)
==15359==
==15359== LEAK SUMMARY:
==15359== definitely lost: 88 bytes in 1 blocks
==15359== indirectly lost: 4 bytes in 1 blocks
==15359== possibly lost: 0 bytes in 0 blocks
==15359== still reachable: 0 bytes in 0 blocks
==15359== suppressed: 0 bytes in 0 blocks
==15359==
==15359== For counts of detected and suppressed errors, rerun with: -v
==15359== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
code.f90:
MODULE m
IMPLICIT NONE
TYPE, ABSTRACT, PUBLIC :: base
INTEGER, ALLOCATABLE :: i(:)
END TYPE
TYPE, EXTENDS(base), PUBLIC :: subtype
CLASS(*), ALLOCATABLE :: x
CONTAINS
PROCEDURE :: new
FINAL :: subtype_final
END TYPE
CONTAINS
FUNCTION new(this)
CLASS(subtype) :: this
CLASS(base), ALLOCATABLE :: new
ALLOCATE(subtype::new)
SELECT TYPE ( new )
CLASS IS ( subtype )
ALLOCATE(new%x, SOURCE=this)
END SELECT
END FUNCTION
SUBROUTINE subtype_final(this)
TYPE(subtype) :: this
IF ( ALLOCATED(this%x) ) DEALLOCATE(this%x)
IF ( ALLOCATED(this%i) ) DEALLOCATE(this%i)
END SUBROUTINE
END MODULE
USE m
IMPLICIT NONE
CLASS(subtype), ALLOCATABLE :: z
CLASS(base), ALLOCATABLE :: w
ALLOCATE(z)
ALLOCATE(z%x, SOURCE=0)
ALLOCATE(w, SOURCE=z%new())
DEALLOCATE(w)
DEALLOCATE(z)
END PROGRAM
>From gcc-bugs-return-639335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 11:54:28 2019
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Subject: [Bug other/55930] [7/8/9 Regression] libatomic build failure if configured with --disable-dependency-tracking
Date: Tue, 02 Apr 2019 11:54:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-02
Known to work| |4.7.4
Summary|libatomic build failure if |[7/8/9 Regression]
|configured with |libatomic build failure if
|--disable-dependency-tracki |configured with
|ng |--disable-dependency-tracki
| |ng
Ever confirmed|0 |1
Known to fail| |4.8.0, 7.4.0, 8.3.0, 9.0
Severity|normal |minor
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Purdie from comment #6)
> Its part of a Yocto Project build and we would only ever build it once so we
> don't need/want the overhead of the dependency tracking information.
But is there any noticeable overhead when using GCC to bootstrap?
Automake documents the option as:
Some compilers do not offer any practical way to derive the list of
dependencies as a side-effect of the compilation, requiring a separate
run (maybe of another tool) to compute these dependencies. The performance
penalty implied by these methods is important enough to disable them by
default.
That doesn't apply here though, because GCC is generating the dependencies via
-MD as a side effect of compilation. So there should be no need to use the
option (other than saving a bit of disk space during the build).
>From gcc-bugs-return-639336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:01:16 2019
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/89255] libphobos.unittests multilib handling broken
Date: Tue, 02 Apr 2019 12:01:00 -0000
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--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> Created attachment 46069
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46069&action=edit
> Use dg-runtest instead of dg-test
>
> (In reply to Iain Buclaw from comment #4)
>> (In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #3)
>> >
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
>> >
>> > compilation is run 10 times in exactly the same way!?
>> >
>>
>> Maybe something is missing in the part copied from GCC_RUNTEST_PARALLELIZE.
>> I did see problems copying gcc_parallel_test_run_p and other procedures
>> locally to the libphobos testsuite, it looked like it replaced itself
>> incorrectly.
>
> Ahh, we're calling dg-test directly, instead of dg-runtest, so there's no
> protection against parallelized tests.
>
> Looking at dejagnu/dg.exp, there's no reason to use dg-test, so switching all
> over.
Yes, that worked fine, thanks. However, looking at libphobos.sum now,
there are still 3 tests that show up more than twice (once for each
multilib):
8 PASS: libphobos.cycles/mod1.d (test for excess errors)
8 PASS: libphobos.cycles/mod1.d execution test
8 PASS: libphobos.cycles/mod2.d (test for excess errors)
8 PASS: libphobos.cycles/mod2.d execution test
8 PASS: libphobos.cycles/mod3.d (test for excess errors)
8 PASS: libphobos.cycles/mod3.d execution test
The different compilations/executions should be distinguished somehow in
the test names.
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P4 |P5
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Unless someone beats me, after testing I am planning to commit as obvious the
following patch
--- ../_clean/gcc/fortran/expr.c 2019-03-28 00:02:39.000000000 +0100
+++ gcc/fortran/expr.c 2019-04-02 14:00:22.000000000 +0200
@@ -4782,7 +4782,6 @@ static bool
comp_pointer (gfc_component *comp)
{
return comp->attr.pointer
- || comp->attr.pointer
|| comp->attr.proc_pointer
|| comp->attr.class_pointer
|| class_pointer (comp);
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
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--- Comment #10 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #7 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> Ignoring the test results, multilib handling seems to be working well for you
> then?
It does indeed, thanks. Not having tested Solaris/SPARC yet doesn't
matter: I don't expect any fundamental issues there, given that things
work fine on Solaris/x86 and Linux/x86_64.
> I can create individual PRs for each failure later.
That would be nice: certainly easier to track than within one large PR
with many unrelated issues.
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Subject: [Bug c++/89923] printf format check and char8_t
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Especially as the C++2a change breaks previously valid code:
printf("%s\n", u8"");
>From gcc-bugs-return-639340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:16:19 2019
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Subject: [Bug fortran/68567] ICE on using wrong defined arrays (different cases/messages)
Date: Tue, 02 Apr 2019 12:16:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
For the record, the tests in comment 1 compile without ICE since GCC6.
Unless someone beats me, I am planning to package the patch in comment 4 and
submit it to the mailing lists.
>From gcc-bugs-return-639342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:21:38 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Tue, 02 Apr 2019 12:21:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Here's a silly example which works with GCC 8 but fails with current trunk:
#include <variant>
struct S {
S(int) : a() { }
char a[8192 * 1024];
};
int main() {
auto& v = *new std::variant<int, S>;
v.emplace<S>(1);
S &s = std::get<1>(v);
return s.a[0];
}
This blows my shell's default 8kb stack limit, because of the temporary that
gets created on the stack.
We could revert to having never-valueless depend on (is_scalar_v<_Types>&&...)
or keep depending on is_trivially_copyable but also check that all the
alternative types are smaller than some limit like 512 bytes.
>From gcc-bugs-return-639341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:21:23 2019
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
Date: Tue, 02 Apr 2019 12:21:00 -0000
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--- Comment #11 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #10 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
> Uni-Bielefeld.DE> ---
>> --- Comment #7 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
>> Ignoring the test results, multilib handling seems to be working well for you
>> then?
>
> It does indeed, thanks. Not having tested Solaris/SPARC yet doesn't
> matter: I don't expect any fundamental issues there, given that things
> work fine on Solaris/x86 and Linux/x86_64.
Ah, I forgot: there's one cosmetic issue left: currently the unittests
are called something like
PASS: ../libdruntime/core/atomic.d -fversion=Shared -shared-libphobos (test for
excess errors)
or
PASS: ../src/std/algorithm/comparison.d -fversion=Shared -shared-libphobos
(test for excess errors)
while they are supposed to be called starting with the directory they
live in: e.g.
libphobos.druntime/core/atomic.d (or libphobos.druntime/core.atomic.d or
some such)
and
libphobos.phobos/src/std/algorithm/comparison.d (or maybe
libphobos.phobos/std.algorithm.comparison.d)
instead.
>From gcc-bugs-return-639343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:23:21 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Tue, 02 Apr 2019 12:23:00 -0000
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--- Comment #9 from 康 çŠ <kangshan0910 at hotmail dot com> ---
That's great! Thank you very much for your support :)
>From gcc-bugs-return-639344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:24:39 2019
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Subject: [Bug libstdc++/85965] [8 Regression] G++ gives cryptic error instead of incomplete type
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] G++ gives |[8 Regression] G++ gives
|cryptic error instead of |cryptic error instead of
|incomplete type |incomplete type
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is fixed on trunk now, but still needs to be backported to gcc-8-branch.
>From gcc-bugs-return-639346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:29:52 2019
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Subject: [Bug other/55930] [7/8/9 Regression] libatomic build failure if configured with --disable-dependency-tracking
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--- Comment #9 from Richard Purdie <richard.purdie at linuxfoundation dot org> ---
(In reply to Jonathan Wakely from comment #8)
> (In reply to Richard Purdie from comment #6)
> > Its part of a Yocto Project build and we would only ever build it once so we
> > don't need/want the overhead of the dependency tracking information.
>
> But is there any noticeable overhead when using GCC to bootstrap?
>
> Automake documents the option as:
>
> Some compilers do not offer any practical way to derive the list of
> dependencies as a side-effect of the compilation, requiring a separate
> run (maybe of another tool) to compute these dependencies. The performance
> penalty implied by these methods is important enough to disable them by
> default.
>
> That doesn't apply here though, because GCC is generating the dependencies
> via -MD as a side effect of compilation. So there should be no need to use
> the option (other than saving a bit of disk space during the build).
We pass this option in globally to anything using automake so whilst for one
piece of software it might not be a huge gain, over a complete Linux stack
built from source the disk space (lack of IO) speed wins are useful alone.
>From gcc-bugs-return-639345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:29:00 2019
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Subject: [Bug fortran/89890] Memory leak from a function returning a subtype
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-02
Ever confirmed|0 |1
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from GCC6 up to trunk (9.0) for the test in comment 3. The culprit
seems to be
ALLOCATE(w, SOURCE=z%new())
>From gcc-bugs-return-639347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 12:51:39 2019
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Subject: [Bug c++/89596] [8/9 regression] Multiple templated conversion operators result in compilation error
Date: Tue, 02 Apr 2019 12:51:00 -0000
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Valentine <v at vsamko dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |v at vsamko dot com
--- Comment #3 from Valentine <v at vsamko dot com> ---
I'm experiencing a very similar problem. Is that a problem with gcc 8 and
later?
>From gcc-bugs-return-639348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:06:50 2019
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Subject: [Bug c++/89596] [8/9 regression] Multiple templated conversion operators result in compilation error
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Valentine from comment #3)
> I'm experiencing a very similar problem. Is that a problem with gcc 8 and
> later?
Yes, as stated in the summary and comment 0.
>From gcc-bugs-return-639349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:13:14 2019
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Subject: [Bug c++/89914] [9 Regression] ICE in nothrow_spec_p, at cp/except.c:1238
Date: Tue, 02 Apr 2019 13:13:00 -0000
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--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This is what I meant in code. Passes testing.
Index: semantics.c
===================================================================
--- semantics.c (revision 270062)
+++ semantics.c (working copy)
@@ -9548,8 +9548,8 @@ classtype_has_nothrow_assign_or_copy_p (tree type,
if (copy_fn_p (fn) > 0)
{
saw_copy = true;
- maybe_instantiate_noexcept (fn);
- if (!TYPE_NOTHROW_P (TREE_TYPE (fn)))
+ if (maybe_instantiate_noexcept (fn)
+ && !TYPE_NOTHROW_P (TREE_TYPE (fn)))
return false;
}
}
@@ -9591,8 +9591,8 @@ trait_expr_value (cp_trait_kind kind, tree type1,
return (trait_expr_value (CPTK_HAS_TRIVIAL_CONSTRUCTOR, type1, type2)
|| (CLASS_TYPE_P (type1)
&& (t = locate_ctor (type1))
- && (maybe_instantiate_noexcept (t),
- TYPE_NOTHROW_P (TREE_TYPE (t)))));
+ && maybe_instantiate_noexcept (t)
+ && TYPE_NOTHROW_P (TREE_TYPE (t))));
case CPTK_HAS_TRIVIAL_CONSTRUCTOR:
type1 = strip_array_types (type1);
>From gcc-bugs-return-639350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:23:51 2019
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Subject: [Bug c++/81171] Segfault with auto template deduction
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Paul le roux <xonar.leroux at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Paul le roux <xonar.leroux at gmail dot com> ---
This has been fixed somewhere between when this was reported and 8.2.1 which I
am currently using.
>From gcc-bugs-return-639351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:24:00 2019
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From: "eyalroz at technion dot ac.il" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/89924] New: [missed-optimization] Function not de-virtualized within the same TU
Date: Tue, 02 Apr 2019 13:24:00 -0000
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Bug ID: 89924
Summary: [missed-optimization] Function not de-virtualized
within the same TU
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Related StackOverflow question: https://stackoverflow.com/q/55464578/1593077
GodBolt example: https://godbolt.org/z/l0vdFG
In the following code:
struct A {
virtual A& operator+=(const A& other) noexcept = 0;
};
void foo_inner(int *p) noexcept { *p += *p; }
void foo_virtual_inner(A *p) noexcept { *p += *p; }
void foo(int *p) noexcept
{
return foo_inner(p);
}
struct Aint : public A {
int i;
A& operator+=(const A& other) noexcept override final
{
i += dynamic_cast<const Aint&>(other).i;
// i += reinterpret_cast<const Aint&>(other).i;
return *this;
}
};
void foo_virtual(Aint *p) noexcept
{
return foo_virtual_inner(p);
}
Both functions, `foo()` and `foo_virtual()`, should compile to the same thing.
But g++ 8.3 (on x86_64) with -O3 produces:
```
foo(int*):
sal DWORD PTR [rdi]
ret
foo_virtual(Aint*):
mov rax, QWORD PTR [rdi]
mov rax, QWORD PTR [rax]
cmp rax, OFFSET FLAT:Aint::operator+=(A const&)
jne .L19
push rbx
xor ecx, ecx
mov edx, OFFSET FLAT:typeinfo for Aint
mov esi, OFFSET FLAT:typeinfo for A
mov rbx, rdi
call __dynamic_cast
test rax, rax
je .L20
mov eax, DWORD PTR [rax+8]
add DWORD PTR [rbx+8], eax
pop rbx
ret
.L19:
mov rsi, rdi
jmp rax
foo_virtual(Aint*) [clone .cold.1]:
.L20:
call __cxa_bad_cast
```
i.e. it doesn't manage to de-virtualize `Aint::operator+=` - although it really
should. It has all the necessary information, as far as I can tell.
As a side note, even regardless of de-virtualization, there's a whole lot of
code there, while with with clang 8, we only get:
```
foo_virtual(Aint*): # @foo_virtual(Aint*)
mov rax, qword ptr [rdi]
mov rax, qword ptr [rax]
mov rsi, rdi
jmp rax
```
which at least doesn't need the type info.
>From gcc-bugs-return-639352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:39:07 2019
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From: "neil.n.carlson at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89925] New: [8,9 Regression] Wrong array bounds from ALLOCATE with MOLD
Date: Tue, 02 Apr 2019 13:39:00 -0000
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My colleague passed this example on to me to report. This runs correctly with a
8.2.1 and 9 from Sept, but fails with the current 8 and 9 versions. I believe
it may be a result of the same bad commit(s) that caused PR89174 which I
reported. This example and the one from the other PR originate from the same
code.
module arraytest
use, intrinsic :: iso_fortran_env
contains
subroutine allocarray(moldarray)
real(real64), contiguous, intent(in) :: moldarray(0:,0:,0:)
real(real64), allocatable :: array(:,:,:)
integer :: lb1(3),lb2(3)
allocate(array,mold=moldarray)
lb1 = lbound(moldarray)
lb2 = lbound(array)
if (lb1(1).ne.lb2(1)) write(*,*) "ERROR"
end subroutine
end module
program test
use arraytest
real(real64), allocatable, target :: array(:,:,:)
allocate(array(5,5,5))
call allocarray(array)
end program
>From gcc-bugs-return-639353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:43:06 2019
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Subject: [Bug c++/69289] Compiling without --profile-generate causes longer execution time (-O3)
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--- Comment #5 from Paul le roux <xonar.leroux at gmail dot com> ---
On the GCC trunk version on godbolt.org there is still a difference between the
two cases, but it seems to have turned around. The noprofile case has
vector::resize partially inlined and in the profile case, it is not inlined.
This makes more sense (to me at least) since I expect that certain functions
won't be inlined so that one can gather better profile information. If it is
the case that `--profile-generate` should be less aggressive when inlining then
this bug report can be closed.
>From gcc-bugs-return-639354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:53:50 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/89926] New: -Wmain warning about return type doesn't show location of the return type
Date: Tue, 02 Apr 2019 13:53:00 -0000
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Bug ID: 89926
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of the return type
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As I observed in bug 83797 comment 4, this location looks wrong:
vm.c:1:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
void main() { }
^~~~
I would expect:
vm.cc:1:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
void main() { }
^~~~
>From gcc-bugs-return-639355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 13:54:11 2019
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Subject: [Bug c++/83797] Inconsistent error messages for main
Date: Tue, 02 Apr 2019 13:54:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> FWIW the C front-end highlights the function name not the return type:
>
> vm.c:1:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
> void main() { }
> ^~~~
Which is now PR 89926
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Subject: [Bug libstdc++/89927] New: Inconsistent behavior in std::regex when optimized
Date: Tue, 02 Apr 2019 14:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89927
Bug ID: 89927
Summary: Inconsistent behavior in std::regex when optimized
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: xonar.leroux at gmail dot com
Target Milestone: ---
Created attachment 46073
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46073&action=edit
Minimal case that triggers the bug
Compiling with: `g++ test.cpp` and running results in no exception as expected.
Compiling with `g++ -O3 test.cpp` and running results in
terminate called after throwing an instance of 'std::regex_error'
what(): Unexpected token in brace expression.
Compiling with `clang++ -fsanitize=undefined test.cpp` and running
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../include/c++/8.2.1/bits/regex_compiler.h:200:40:
runtime error: addition of unsigned offset to 0x5581d2265f61 overflowed to
0x5581d2264b15
terminate called after throwing an instance of 'std::regex_error'
what(): Unexpected token in brace expression.
I am using the latest g++, libstdc++11 and clang++ versions from Arch Linux
(2019 April 2).
GCC Version:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
--enable-cet=auto
Thread model: posix
gcc version 8.2.1 20181127 (GCC)
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From: "doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89928] New: [8 Regression] errors out in c++17 mode
Date: Tue, 02 Apr 2019 14:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89928
Bug ID: 89928
Summary: [8 Regression] errors out in c++17 mode
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 46074
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46074&action=edit
preprocessed source
[forwarded from https://bugs.debian.org/926234]
fails with r269936 on the gcc-8-branch, succeeds with the 8.3.0 release.
g++ -std=c++17 main.cpp
but works with
g++ -std=c++14 main.cpp
currently reducing ...
>From gcc-bugs-return-639358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 14:21:25 2019
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Subject: [Bug c++/89928] [8 Regression] errors out in c++17 mode
Date: Tue, 02 Apr 2019 14:21:00 -0000
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--- Comment #1 from Matthias Klose <doko at debian dot org> ---
$ cat main.ii
template <template <typename> class> struct a;
template <template <typename> class T1> struct b { a<T1> c; };
template <template <typename T1, typename T2, typename T3> class F> struct d;
template <template <typename P1, typename P2, typename P3> class F> struct d;
$ g++ -std=c++17 main.ii
main.ii:3:66: error: template parameter 'template<class T1, class T2, class T3>
class F'
template <template <typename T1, typename T2, typename T3> class F> struct d;
^
main.ii:4:76: error: redeclared here as 'template<class P1, class P2, class P3>
class F'
template <template <typename P1, typename P2, typename P3> class F> struct d;
^
>From gcc-bugs-return-639359-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 14:25:15 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
Date: Tue, 02 Apr 2019 14:25:00 -0000
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--- Comment #34 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #33)
> On Sat, 30 Mar 2019, segher at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87984
> >
> > --- Comment #32 from Segher Boessenkool <segher at gcc dot gnu.org> ---
> > Historically, a local register asm variable *does* live in that variable
> > for its entire scope. This stopped working correctly, even with the many
> > caveats there were for it, and many years ago the manual added language
> > saying that only using such a var in an extended asm in or out is supported,
> > and there was language warning you to keep the life time short, etc.
> >
> > This did *not* change the implementation. Any other use still is explicitly
> > unsupported, and all such testcases are invalid code.
>
> Hmm, but that means the only effect of a local reg var would be
> implicit input/output constraints, right?
Explicit. Yes. That is the documented only supported use. But it is not
currently the only thing it *does*.
> Of course there's also
> calls(?) that would need to remat all local register vars.
>
> The asm part could be easily represented on GIMPLE by making those
> constraints explicit. The call issue would need explicit save/restore
> code which is then exposed to optimization passes.
>
> But then...
>
> > It would be nice if GCC was changed such that such vars were expanded to a
> > pseudo like any other var, and copies to/from a hard reg just around the asm.
> > Gimple doesn't need to do *anything* for that, just keep track that the var
> > is declared as local register var, and the gimple it had now at expand is
> > just fine:
>
> ... all this could be done at RTL expansion time as well.
Yes, exactly. Gimple could treat local register cars just like any other
pseudo. Then at expand time, you copy it into its hard reg right before an
asm, and back out after it (maybe skip either if the var is not an input resp.
an output of the asm), and everything remat and lifetime etc. will work out
automatically. Unless I am missing something.
But this is *not* what we currently do, and it is not what is documented, and
as far as I can see the testcase here is invalid code.
> Still in GIMPLE we'd have to treat calls at modifying/using
> local reg vars? That leaves us with forcing of virtual operands
> on all calls eventually using those vars.
I think it will all work out fine without treating local register var any
different from any other local variable.
>From gcc-bugs-return-639360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 14:47:57 2019
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89925] [9 Regression] Wrong array bounds from ALLOCATE with SOURCE or MOLD
Date: Tue, 02 Apr 2019 14:47:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |7.4.1, 8.3.1
Keywords| |wrong-code
Last reconfirmed| |2019-04-02
CC| |burnus at gcc dot gnu.org
Ever confirmed|0 |1
Summary|[8,9 Regression] Wrong |[9 Regression] Wrong array
|array bounds from ALLOCATE |bounds from ALLOCATE with
|with MOLD |SOURCE or MOLD
Known to fail| |9.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I don't see the problem in my latest GCC8 (r270042) and my bisection points to
r265212 (pr67125).
I also see the problem with SOURCE.
>From gcc-bugs-return-639361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 15:08:36 2019
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From: "roman.s.dubtsov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89919] internal compiler error when building MKL-DNN
Date: Tue, 02 Apr 2019 15:08:00 -0000
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--- Comment #4 from Roman Dubtsov <roman.s.dubtsov at intel dot com> ---
@Martin: I'm not sure how useful this info after bisection has been done, but
FWIW 8.1.0 ICEs and and 7.4.0 does not.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89928] [8 Regression] errors out in c++17 mode
Date: Tue, 02 Apr 2019 15:12:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
dup of PR 89906?
>From gcc-bugs-return-639363-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 15:30:46 2019
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Subject: [Bug translation/80055] do not mark internal compiler error messages for i18n
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80055
--- Comment #8 from Frederic Marchal <fmarchal at perso dot be> ---
Two years later, I appear to be the only active translator. I translated all
the messages. So, cutting down the number of messages is not an issue I feel
overly concerned with :-)
Removing the internal error translations means more work for you. Will it
benefit gcc and attract more translators? I doubt it. 13k messages is pretty
daunting. Shortening it by several hundred messages will not help much. You can
certainly spend your time on a more productive task.
Unless fellow translators show up and challenge my opinion, I believe you can
close this bug or postpone it.
As the one doing the job, the decision is entirely up to you :-)
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Subject: [Bug rtl-optimization/85876] ICE in move_op_ascend, at sel-sched.c:6164
Date: Tue, 02 Apr 2019 15:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85876
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Author: amonakov
Date: Tue Apr 2 15:39:22 2019
New Revision: 270095
URL: https://gcc.gnu.org/viewcvs?rev=270095&root=gcc&view=rev
Log:
sel-sched: fixup reset of first_insn (PR 85876)
2019-04-02 Andrey Belevantsev <abel@ispras.ru>
PR rtl-optimization/85876
* sel-sched.c (code_motion_path_driver): Avoid unwinding first_insn
beyond the original fence.
* gcc.dg/pr85876.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr85876.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/sel-sched.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/85876] ICE in move_op_ascend, at sel-sched.c:6164
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/84206] ICE in get_all_loop_exits, at sel-sched-ir.h:1138
Date: Tue, 02 Apr 2019 15:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84206
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Author: amonakov
Date: Tue Apr 2 15:45:57 2019
New Revision: 270096
URL: https://gcc.gnu.org/viewcvs?rev=270096&root=gcc&view=rev
Log:
sel-sched: skip outer loop in get_all_loop_exits (PR 84206)
2019-04-02 Andrey Belevantsev <abel@ispras.ru>
PR rtl-optimization/84206
* sel-sched-ir.h (get_all_loop_exits): Avoid the outer loop when
iterating over loop headers.
* gcc.dg/pr84206.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr84206.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/sel-sched-ir.h
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/84206] ICE in get_all_loop_exits, at sel-sched-ir.h:1138
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/80174] [meta-bug] Fortran lto issues
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Bug 80174 depends on bug 68717, which changed state.
Bug 68717 Summary: [7/8/9 Regression] New (bogus?) warnings when compiling some gfortran.dg tests with -flto after r231239
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68717
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Subject: [Bug libfortran/77278] Use LTO for libgfortran
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Bug 77278 depends on bug 68717, which changed state.
Bug 68717 Summary: [7/8/9 Regression] New (bogus?) warnings when compiling some gfortran.dg tests with -flto after r231239
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68717
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Subject: [Bug fortran/68717] [7/8/9 Regression] New (bogus?) warnings when compiling some gfortran.dg tests with -flto after r231239
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The warnings are gone on trunk (9.0) and nobody care to answer my question in
comment 10, closing.
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Subject: [Bug fortran/68649] [7/8/9 Regression] note: code may be misoptimized unless -fno-strict-aliasing is used
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #27 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
See pr68717 comment 11, closing.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77278
Bug 77278 depends on bug 68649, which changed state.
Bug 68649 Summary: [7/8/9 Regression] note: code may be misoptimized unless -fno-strict-aliasing is used
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68649
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/47660] Retain warning text of -Wconversion messages when -Wconversion-extra is in effect
Date: Tue, 02 Apr 2019 16:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47660
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Note that the warning
>
> i = 0._8
> 1
> Warning: Possible change of value in conversion from REAL(8) to INTEGER(4) at (1)
>
> is no longer issued with 5.0.
I meant with -Wconversion.
From the manual
> -Wconversion
> Warn about implicit conversions that are likely to change the value
> of the expression after conversion. Implied by -Wall.
>
> -Wconversion-extra
> Warn about implicit conversions between different types and kinds.
> This option does not imply -Wconversion.
IMO the different warnings for the two options make sense. Without feedback
I'll close the PR as WONTFIX.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/89646] [7/8/9 Regression] Spurious actual argument might interfere warning
Date: Tue, 02 Apr 2019 16:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89646
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The warning is unconditional, but it should be easy to replace the 9
> with some suitable option.
I meant "replace the 0".
>From gcc-bugs-return-639375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 16:44:39 2019
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Subject: [Bug fortran/84487] [8/9 Regression] Large rodate section increase in 465.tonto with r254427
Date: Tue, 02 Apr 2019 16:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84487
--- Comment #21 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #20)
> Sometimes life can be easy.
>
> We need to make -fzero-initialized-in-bss the default for
> gfortran.
Actually, no. I checked with a wrong version of the compiler :-(
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From: "nheart at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89929] New: __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Tue, 02 Apr 2019 16:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89929
Bug ID: 89929
Summary: __attribute__((target("avx512bw"))) doesn't work on
non avx512bw systems
Product: gcc
Version: 8.3.1
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Created attachment 46075
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46075&action=edit
testcase for attribute avx512bw
Hey,
I was trying to use function multi-versioning and it turns out that if I
specify the attribute to __attribute__((target("avx512bw"))), I get a
compilation error on non-avx512bw systems that reads:
g++ test.cpp :(
test.cpp: In function ‘_Z3fooi.resolver’:
test.cpp:1:41: error: No dispatcher found for avx512bw
__attribute__((target("avx512bw"))) int foo(int i) {
This works fine if I specify -mavx512f in a sense that it compiles, but
dispatches to the wrong function at runtime (as it probably ignores the avx2
target in the compilation)
I change avx512bw to avx512f the program compiles correctly and at runtime
dispatches to the correct function version for my processor (avx2). The problem
doesn't occur in clang v8, not that it is relevant.
In addition, it seems that gcc recognizes this as valid syntax:
__attribute__((target("avx512bw", "avx512f")))
But actually ignores everything after the comma in target's arguments. Not sure
if I should open another bug for that. Please find a small testcase attached.
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From: "dilyan.palauzov at aegee dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/89930] New: - -Wl,--wrap= incompatible with -flto
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89930
Bug ID: 89930
Summary: - -Wl,--wrap= incompatible with -flto
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
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CC: marxin at gcc dot gnu.org
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This is t.c:
------------
#include <stdio.h>
#include <unistd.h>
ssize_t __wrap_read(int fd, void *buffer, size_t count) {
printf("%s\n", (char*)buffer);
return fd + count;
}
int main() {
int i = read(1, "abc", 5);
printf("%i\n", i);
}
------------
I have gcc 8.3.1 20190311, ld.bfd 2.32.51.20190319, ld.gold 1.16
2.32.51.20190319 and clang 8.0.0.
This works
clang -flto -fuse-ld=gold -Wl,--wrap=read t.c
gcc -fuse-ld=bfd -Wl,--wrap=read t.c
gcc -fuse-ld=gold -Wl,--wrap=read t.c
clang -fuse-ld=bfd -Wl,--wrap=read t.c
clang -fuse-ld=gold -Wl,--wrap=read t.c
This fails
clang -flto -fuse-ld=bfd -Wl,--wrap=read t.c
gcc -flto -fuse-ld=gold -Wl,--wrap=read t.c
gcc -flto -fuse-ld=bfd -Wl,--wrap=read t.c
Since clang+gold works, gcc+gold should also work.
See also https://sourceware.org/bugzilla/show_bug.cgi?id=24406.
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Subject: [Bug target/89903] [9 Regression] ICE: in convert_op, at config/i386/i386.c:2102 with -O2 -march=skylake
Date: Tue, 02 Apr 2019 17:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89903
--- Comment #2 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Apr 2 17:05:59 2019
New Revision: 270102
URL: https://gcc.gnu.org/viewcvs?rev=270102&root=gcc&view=rev
Log:
PR target/89902
PR target/89903
* config/i386/i386.c (dimode_scalar_to_vector_candidate_p):
Return false for variable DImode shifts.
(dimode_scalar_chain::compute_convert_gain): Do not handle
register count operand in variable DImode shifts.
(dimode_scalar_chain::make_vector_copies): Remove support to copy
count argument of a variable shift instruction to a vector register.
(dimode_scalar_chain::convert_reg): Remove support to convert
count argument of a variable shift instruction.
testsuite/ChangeLog:
PR target/89902
PR target/89903
* gcc.target/i386/pr70799-4.c: Remove.
* gcc.target/i386/pr70799-5.c: Remove.
* gcc.target/i386/pr89902.c: New test.
* gcc.target/i386/pr89903.c: Ditto.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr89902.c
trunk/gcc/testsuite/gcc.target/i386/pr89903.c
Removed:
trunk/gcc/testsuite/gcc.target/i386/pr70799-4.c
trunk/gcc/testsuite/gcc.target/i386/pr70799-5.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/89902] ICE: in extract_insn, at recog.c:2310: unrecognizable insn with -mavx512bitalg
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89902
--- Comment #2 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Apr 2 17:05:59 2019
New Revision: 270102
URL: https://gcc.gnu.org/viewcvs?rev=270102&root=gcc&view=rev
Log:
PR target/89902
PR target/89903
* config/i386/i386.c (dimode_scalar_to_vector_candidate_p):
Return false for variable DImode shifts.
(dimode_scalar_chain::compute_convert_gain): Do not handle
register count operand in variable DImode shifts.
(dimode_scalar_chain::make_vector_copies): Remove support to copy
count argument of a variable shift instruction to a vector register.
(dimode_scalar_chain::convert_reg): Remove support to convert
count argument of a variable shift instruction.
testsuite/ChangeLog:
PR target/89902
PR target/89903
* gcc.target/i386/pr70799-4.c: Remove.
* gcc.target/i386/pr70799-5.c: Remove.
* gcc.target/i386/pr89902.c: New test.
* gcc.target/i386/pr89903.c: Ditto.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr89902.c
trunk/gcc/testsuite/gcc.target/i386/pr89903.c
Removed:
trunk/gcc/testsuite/gcc.target/i386/pr70799-4.c
trunk/gcc/testsuite/gcc.target/i386/pr70799-5.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug lto/88643] -Wl,--wrap not supported with LTO
Date: Tue, 02 Apr 2019 17:13:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dilyan.palauzov at aegee dot org
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 89930 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-639380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 17:13:18 2019
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Subject: [Bug lto/89930] - -Wl,--wrap= incompatible with -flto
Date: Tue, 02 Apr 2019 17:13:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 88643 ***
>From gcc-bugs-return-639382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 17:36:34 2019
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From: "timshen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89927] Inconsistent behavior in std::regex when optimized
Date: Tue, 02 Apr 2019 17:36:00 -0000
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Tim Shen <timshen at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |timshen at gcc dot gnu.org
--- Comment #1 from Tim Shen <timshen at gcc dot gnu.org> ---
In the example, by
std::regex(match_name_regex_string, "i");
did you mean
std::regex_match(
"i",
std::regex(match_name_regex_string));
?
The former is UB because match_name_regex_string and "i" form an invalid range
of two const char*.
>From gcc-bugs-return-639383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:03:02 2019
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Subject: [Bug c++/89931] New: Incorrect compiler error with temporary object used as function arguments
Date: Tue, 02 Apr 2019 18:03:00 -0000
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Bug ID: 89931
Summary: Incorrect compiler error with temporary object used as
function arguments
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 46076
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46076&action=edit
zip package including source and temp files
The following code
---
#include <iostream>
void foo(const char**) { std::cout << "do something"; }
int main() {
using argT = const char*[];
foo(argT{"a", "b"});
return 0;
}
---
errors out due to following error:
---
main.cpp:7:9: error: taking address of temporary array
foo(argT{"a", "b"});
---
However, at line 7, adding std::move before invoking foo(), i.e.:
---
foo(std::move(argT{"a", "b"}));
---
suppresses the error.
Other compilers like MSVC, ICC, Clang does not have this issue.
-------------------
VERSION & SYSTEM:
gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)
Target: x86_64-linux-gnu
Thread model: posix
INSTALL CMD:
apt-get install
COMPILATION FAILURE DETAIL:
% gcc -Wall -Wextra main.cpp -o a.out
main.cpp: In function int main() :
main.cpp:7:9: error: taking address of temporary array
foo(argT{"a", "b"});
^~~~~~~~~~~~~~
MORE INFO:
https://stackoverflow.com/questions/55463861/why-does-passing-a-temporary-object-as-an-argument-need-stdmove
>From gcc-bugs-return-639384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:17:35 2019
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Subject: [Bug translation/80055] do not mark internal compiler error messages for i18n
Date: Tue, 02 Apr 2019 18:17:00 -0000
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--- Comment #9 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Frederic Marchal from comment #8)
> Two years later, I appear to be the only active translator. I translated all
> the messages. So, cutting down the number of messages is not an issue I feel
> overly concerned with :-)
I'm still there as the second active translator.
I took a different strategy of translating the internal errors. I just prefixed
each of them with "Interner Compilerfehler: " and then took the English text
verbatim. I still think this is the best strategy since it provides a bit of
information to the compiler user in their language, and provides the GCC
developers with the original error message that can be quickly found in the
source code.
I never actually checked to see how these messages look like in practice. Is
there a hidden command line option --force-internal-compiler-error somewhere?
It should be quite hard to produce an ICE in any other way.
If the prefix would now be doubled, I could as well remove it from all the
"translated" German messages.
>From gcc-bugs-return-639385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:28:05 2019
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From: "dilyan.palauzov at aegee dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/88643] -Wl,--wrap not supported with LTO
Date: Tue, 02 Apr 2019 18:28:00 -0000
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--- Comment #7 from ДилÑн Палаузов <dilyan.palauzov at aegee dot org> ---
As noted at https://sourceware.org/bugzilla/show_bug.cgi?id=24406 this does
work with clang+gold and clang+lld, but not with clang+bfd.
As this does not work with gcc+gold, the problem is not in the linker.
>From gcc-bugs-return-639386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:29:49 2019
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
Date: Tue, 02 Apr 2019 18:29:00 -0000
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--- Comment #13 from seurer at gcc dot gnu.org ---
Note that r270046 introduced the same thing into gcc 8.
>From gcc-bugs-return-639387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:34:27 2019
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
Date: Tue, 02 Apr 2019 18:34:00 -0000
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--- Comment #14 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Note that r270046 introduced the same thing into gcc 8.
Yes, and r270047 into gcc 7.
>From gcc-bugs-return-639388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:34:59 2019
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Subject: [Bug c/89932] New: ICE in must_pass_in_stack_var_size_or_pad, at calls.c:5824
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Bug ID: 89932
Summary: ICE in must_pass_in_stack_var_size_or_pad, at
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Component: c
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Reporter: gscfq@t-online.de
Target Milestone: ---
Affects versions down to at least gcc-4.1 :
$ cat z1.c
enum bool a ();
unsigned a () {}
$ gcc-9-20190331 -c z1.c
z1.c: In function 'a':
z1.c:2:1: internal compiler error: Segmentation fault
2 | unsigned a () {}
| ^~~~~~~~
0xa748df crash_signal
../../gcc/toplev.c:326
0x6b1f2e must_pass_in_stack_var_size_or_pad(machine_mode, tree_node const*)
../../gcc/calls.c:5824
0xd123bf ix86_must_pass_in_stack
../../gcc/config/i386/i386.c:7065
0xd269cc classify_argument
../../gcc/config/i386/i386.c:7668
0xd2756a examine_argument
../../gcc/config/i386/i386.c:8061
0xd359ef ix86_return_in_memory
../../gcc/config/i386/i386.c:9437
0x80769f aggregate_value_p(tree_node const*, tree_node const*)
../../gcc/function.c:2109
0x809454 allocate_struct_function(tree_node*, bool)
../../gcc/function.c:4762
0x5ddc3f store_parm_decls()
../../gcc/c/c-decl.c:9527
0x61e879 c_parser_declaration_or_fndef
../../gcc/c/c-parser.c:2318
0x623a53 c_parser_external_declaration
../../gcc/c/c-parser.c:1653
0x624519 c_parser_translation_unit
../../gcc/c/c-parser.c:1534
0x624519 c_parse_file()
../../gcc/c/c-parser.c:19854
0x66ba20 c_common_parse_file()
../../gcc/c-family/c-opts.c:1156
>From gcc-bugs-return-639389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:37:49 2019
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Subject: [Bug target/89902] ICE: in extract_insn, at recog.c:2310: unrecognizable insn with -mavx512bitalg
Date: Tue, 02 Apr 2019 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89902
--- Comment #3 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Apr 2 18:37:14 2019
New Revision: 270104
URL: https://gcc.gnu.org/viewcvs?rev=270104&root=gcc&view=rev
Log:
PR target/89902
PR target/89903
* config/i386/i386.c (dimode_scalar_to_vector_candidate_p):
Return false for variable DImode shifts.
(dimode_scalar_chain::compute_convert_gain): Do not handle
register count operand in variable DImode shifts.
(dimode_scalar_chain::make_vector_copies): Remove support to copy
count argument of a variable shift instruction to a vector register.
(dimode_scalar_chain::convert_reg): Remove support to convert
count argument of a variable shift instruction.
testsuite/ChangeLog:
PR target/89902
PR target/89903
* gcc.target/i386/pr70799-4.c: Remove.
* gcc.target/i386/pr70799-5.c: Remove.
* gcc.target/i386/pr89902.c: New test.
* gcc.target/i386/pr89903.c: Ditto.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr89902.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr89903.c
Removed:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr70799-4.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr70799-5.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/i386/i386.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/89903] [9 Regression] ICE: in convert_op, at config/i386/i386.c:2102 with -O2 -march=skylake
Date: Tue, 02 Apr 2019 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89903
--- Comment #3 from uros at gcc dot gnu.org ---
Author: uros
Date: Tue Apr 2 18:37:14 2019
New Revision: 270104
URL: https://gcc.gnu.org/viewcvs?rev=270104&root=gcc&view=rev
Log:
PR target/89902
PR target/89903
* config/i386/i386.c (dimode_scalar_to_vector_candidate_p):
Return false for variable DImode shifts.
(dimode_scalar_chain::compute_convert_gain): Do not handle
register count operand in variable DImode shifts.
(dimode_scalar_chain::make_vector_copies): Remove support to copy
count argument of a variable shift instruction to a vector register.
(dimode_scalar_chain::convert_reg): Remove support to convert
count argument of a variable shift instruction.
testsuite/ChangeLog:
PR target/89902
PR target/89903
* gcc.target/i386/pr70799-4.c: Remove.
* gcc.target/i386/pr70799-5.c: Remove.
* gcc.target/i386/pr89902.c: New test.
* gcc.target/i386/pr89903.c: Ditto.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr89902.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr89903.c
Removed:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr70799-4.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr70799-5.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/i386/i386.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:37:54 2019
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Subject: [Bug c/89933] New: [7/8/9 Regression] ICE in merge_decls, at c/c-decl.c:2517
Date: Tue, 02 Apr 2019 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89933
Bug ID: 89933
Summary: [7/8/9 Regression] ICE in merge_decls, at
c/c-decl.c:2517
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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Doubled line affects versions 7 up to trunk.
gcc-6 rejects it with an error.
clang7 and icc19 accepts it without any warning/error.
$ cat z1.c
typedef unsigned int a __attribute__ ((__aligned__(8), __may_alias__));
typedef unsigned int a __attribute__ ((__aligned__(8), __may_alias__));
$ gcc-9-20190331 -c z1.c
z1.c:2:1: internal compiler error: Segmentation fault
2 | typedef unsigned int a __attribute__ ((__aligned__(8), __may_alias__));
| ^~~~~~~
0xa748df crash_signal
../../gcc/toplev.c:326
0x5c9023 merge_decls
../../gcc/c/c-decl.c:2517
0x5c9023 duplicate_decls
../../gcc/c/c-decl.c:2886
0x5cb067 pushdecl(tree_node*)
../../gcc/c/c-decl.c:3072
0x5db56d start_decl(c_declarator*, c_declspecs*, bool, tree_node*)
../../gcc/c/c-decl.c:5016
0x61d983 c_parser_declaration_or_fndef
../../gcc/c/c-parser.c:2154
0x623a53 c_parser_external_declaration
../../gcc/c/c-parser.c:1653
0x624519 c_parser_translation_unit
../../gcc/c/c-parser.c:1534
0x624519 c_parse_file()
../../gcc/c/c-parser.c:19854
0x66ba20 c_common_parse_file()
../../gcc/c-family/c-opts.c:1156
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Subject: [Bug target/89902] ICE: in extract_insn, at recog.c:2310: unrecognizable insn with -mavx512bitalg
Date: Tue, 02 Apr 2019 18:38:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
Target Milestone|--- |8.4
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
>From gcc-bugs-return-639393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:39:47 2019
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Subject: [Bug target/89903] [9 Regression] ICE: in convert_op, at config/i386/i386.c:2102 with -O2 -march=skylake
Date: Tue, 02 Apr 2019 18:39:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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Target Milestone|9.0 |8.4
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
>From gcc-bugs-return-639394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 18:40:38 2019
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Subject: [Bug c/89934] New: [9 Regression] ICE in tree_fits_uhwi_p, at tree.c:7237
Date: Tue, 02 Apr 2019 18:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89934
Bug ID: 89934
Summary: [9 Regression] ICE in tree_fits_uhwi_p, at tree.c:7237
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Changed between 20190210 and 20190217, at -O[s123].
(gcc-8 needs -Wall, and changed behavior before 20180525)
$ cat z1.c
char *strncpy();
void foo (char *a)
{
strncpy (a, a);
}
$ gcc-9-20190331 -c z1.c -O2
z1.c: In function 'foo':
z1.c:4:3: warning: too few arguments to built-in function 'strncpy' expecting 3
[-Wbuiltin-declaration-mismatch]
4 | strncpy (a, a);
| ^~~~~~~
z1.c:1:7: note: declared here
1 | char *strncpy();
| ^~~~~~~
during GIMPLE pass: wrestrict
z1.c:2:6: internal compiler error: Segmentation fault
2 | void foo (char *a)
| ^~~
0xa748df crash_signal
../../gcc/toplev.c:326
0xca6a37 tree_fits_uhwi_p(tree_node const*)
../../gcc/tree.c:7237
0x6aecbc get_size_range(tree_node*, tree_node**, bool)
../../gcc/calls.c:1238
0x83ca3e builtin_access
../../gcc/gimple-ssa-warn-restrict.c:735
0x83d39f check_bounds_or_overlap(gimple*, tree_node*, tree_node*, tree_node*,
tree_node*, bool, bool)
../../gcc/gimple-ssa-warn-restrict.c:1933
0x83f7f0 check_call
../../gcc/gimple-ssa-warn-restrict.c:1904
0x83f7f0 before_dom_children
../../gcc/gimple-ssa-warn-restrict.c:105
0x1164c54 dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:353
0x835aa7 execute
../../gcc/gimple-ssa-warn-restrict.c:119
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
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--- Comment #15 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Note that the patch in comment 11 is quite close to the Harald's original patch
at
https://gcc.gnu.org/ml/fortran/2019-03/msg00099.html
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
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--- Comment #16 from anlauf at gcc dot gnu.org ---
I had rejected procedure arguments to TRANSFER in my initial patch, see
https://gcc.gnu.org/ml/fortran/2019-03/msg00099.html
but Thomas persuaded me to be less strict.
So shall I resubmit my original patch, or is Steve's comment#11 better?
Of course the testcase needs adjustments.
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
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--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> So shall I resubmit my original patch, or is Steve's comment#11 better?
I'ld take Steve's conditions, but your wording for the errors!-)
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
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--- Comment #18 from tkoenig at netcologne dot de <tkoenig at netcologne dot de> ---
Am 02.04.19 um 20:48 schrieb anlauf at gcc dot gnu.org:
> I had rejected procedure arguments to TRANSFER in my initial patch, see
>
> https://gcc.gnu.org/ml/fortran/2019-03/msg00099.html
>
> but Thomas persuaded me to be less strict.
I guess I had it wrong, then.
Procedure pointer arguments to functions should be OK and take
their type etc. information from the type of the pointer.
Also, functions returning pointers should be permitted.
This is what I orignally had in mind.
I agree that mysel a subroutine argument or pure function argument
makes no sense.
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Subject: [Bug c/89933] [7/8/9 Regression] ICE in merge_decls, at c/c-decl.c:2517
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The ICE was introduced in r237137:
r237137 | mpolacek | 2016-06-06 11:50:23 -0400 (Mon, 06 Jun 2016) | 8 lines
* c-typeck.c (comptypes_internal): Handle comparisons of
INTEGER_TYPE, FIXED_POINT_TYPE, and REAL_TYPE nodes. Don't check
TYPE_REF_CAN_ALIAS_ALL.
Before then GCC failed to accept the code:
t.c:2:22: error: conflicting types for ‘a’
typedef unsigned int a __attribute__ ((__aligned__(8), __may_alias__));
^
t.c:1:22: note: previous declaration of ‘a’ was here
typedef unsigned int a __attribute__ ((__aligned__(8), __may_alias__));
^
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Subject: [Bug middle-end/89934] [9 Regression] ICE in tree_fits_uhwi_p, at tree.c:7237
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Introduced in r255031:
r255031 | msebor | 2017-11-21 15:01:58 -0500 (Tue, 21 Nov 2017) | 29 lines
PR tree-optimization/82945 - add warning for passing non-strings to functions
that expect string arguments
gcc/ChangeLog:
PR tree-optimization/82945
* builtins.c (expand_builtin_strlen): Call maybe_warn_nonstring_arg.
* calls.h (maybe_warn_nonstring_arg): Declare new function.
* calls.c (get_attr_nonstring_decl, maybe_warn_nonstring_arg): New
functions.
(initialize_argument_information): Call maybe_warn_nonstring_arg.
* calls.h (get_attr_nonstring_decl): Declare new function.
* doc/extend.texi (attribute nonstring): Update.
* gimple-fold.c (gimple_fold_builtin_strncpy): Call
get_attr_nonstring_decl and handle it.
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Same. Improve
detection of nul-termination.
(strlen_to_stridx): Change to a pointer.
(handle_builtin_strlen, handle_builtin_stxncpy): Adjust.
(pass_strlen::execute): Same.
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Subject: [Bug target/89932] ICE in must_pass_in_stack_var_size_or_pad, at calls.c:5824
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Confirmed. Not a recent regression.
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
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--- Comment #19 from anlauf at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #17)
> > So shall I resubmit my original patch, or is Steve's comment#11 better?
>
> I'ld take Steve's conditions, but your wording for the errors!-)
Steve's patch would not reject:
subroutine f
use, intrinsic :: iso_c_binding
integer(c_intptr_t) :: b, c
procedure(), pointer :: a
c = transfer (a, b)
c = transfer (transfer (b, a), b)
end
so this is probably what Thomas had in mind.
I'll package the patch and submit.
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Subject: [Bug target/89935] New: [Arm] Return from interrupt on Cortex-R52 must use eret instruction
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Assignee: unassigned at gcc dot gnu.org
Reporter: alfedotov at gmail dot com
Target Milestone: ---
Compiling following code for Arm Cortex-r52:
extern int another_func(int);
void __attribute__ ((interrupt ("IRQ"))) IRQ_Handler(void)
{
another_func(0);
}
gcc generates epilogue respectively:
ldmfd sp!, {r0, r1, r2, r3, r4, fp, ip, pc}^
The problem is that on Cortex-R52 virtualization is used so that when IRQ
interrupt happens in Hypervisor mode (EL2) return from interrupt must use ERET
instruction. Otherwise Undefined exception occurs (what actually corresponds to
chapter F5.1.65 LDM (exception return) in
https://static.docs.arm.com/ddi0487/da/DDI0487D_a_armv8_arm.pdf?_ga=2.927729.1146405679.1554127327-529207546.1554127327)
Probably we should introduce new ISR attribute like IRQ_el2 or IRQ_hyp.
>From gcc-bugs-return-639404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 19:15:36 2019
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Subject: [Bug target/89932] ICE in must_pass_in_stack_var_size_or_pad, at calls.c:5824
Date: Tue, 02 Apr 2019 19:15:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely a dup of bug 67694.
>From gcc-bugs-return-639405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 19:20:33 2019
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Subject: [Bug c/89798] excessive vector_size silently accepted and truncated
Date: Tue, 02 Apr 2019 19:20:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
One of the reasons why big vectors don't work seems to be the assumption in
TYPE_VECTOR_SUBPARTS() that they can't be bigger than 2^31. But fixing this
function alone doesn't seem to be sufficient.
inline poly_uint64
TYPE_VECTOR_SUBPARTS (const_tree node)
{
STATIC_ASSERT (NUM_POLY_INT_COEFFS <= 2);
unsigned int precision = VECTOR_TYPE_CHECK (node)->type_common.precision;
if (NUM_POLY_INT_COEFFS == 2)
{
poly_uint64 res = 0;
res.coeffs[0] = 1 << (precision & 0xff);
if (precision & 0x100)
res.coeffs[1] = 1 << (precision & 0xff);
return res;
}
else
return 1 << precision;
}
>From gcc-bugs-return-639406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 19:34:34 2019
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Subject: [Bug rtl-optimization/80960] [7/8/9 Regression] Huge memory use when compiling a very large test case
Date: Tue, 02 Apr 2019 19:34:00 -0000
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--- Comment #15 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It seems to be that this happens for huge basic blocks, and the combiner
tries to combine pairs of instructions that are far apart. This is unlikely
to work often, and the cost is quadratic in # insns, the way checking where
a register is used works.
The param to do only 2->1 (and 2->2) combinations should help a lot, make
combine not take longer than the rest of the compiler does. Does it?
>From gcc-bugs-return-639407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 19:46:06 2019
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
Date: Tue, 02 Apr 2019 19:46:00 -0000
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--- Comment #20 from anlauf at gcc dot gnu.org ---
Patch here:
https://gcc.gnu.org/ml/fortran/2019-04/msg00003.html
>From gcc-bugs-return-639408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 19:54:54 2019
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/89255] libphobos.unittests multilib handling broken
Date: Tue, 02 Apr 2019 19:54:00 -0000
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--- Comment #12 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #9)
> > --- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> > Created attachment 46069 [details]
> > --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46069&action=edit
> > Use dg-runtest instead of dg-test
> >
> > (In reply to Iain Buclaw from comment #4)
> >> (In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #3)
> >> >
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> > FAIL: libphobos.shared/finalize.d -shared-libphobos -ldl execution test
> >> >
> >> > compilation is run 10 times in exactly the same way!?
> >> >
> >>
> >> Maybe something is missing in the part copied from GCC_RUNTEST_PARALLELIZE.
> >> I did see problems copying gcc_parallel_test_run_p and other procedures
> >> locally to the libphobos testsuite, it looked like it replaced itself
> >> incorrectly.
> >
> > Ahh, we're calling dg-test directly, instead of dg-runtest, so there's no
> > protection against parallelized tests.
> >
> > Looking at dejagnu/dg.exp, there's no reason to use dg-test, so switching all
> > over.
>
> Yes, that worked fine, thanks. However, looking at libphobos.sum now,
> there are still 3 tests that show up more than twice (once for each
> multilib):
>
> 8 PASS: libphobos.cycles/mod1.d (test for excess errors)
> 8 PASS: libphobos.cycles/mod1.d execution test
> 8 PASS: libphobos.cycles/mod2.d (test for excess errors)
> 8 PASS: libphobos.cycles/mod2.d execution test
> 8 PASS: libphobos.cycles/mod3.d (test for excess errors)
> 8 PASS: libphobos.cycles/mod3.d execution test
>
> The different compilations/executions should be distinguished somehow in
> the test names.
They differ by libphobos_run_args, not by compilation flags.
Maybe I'm running these tests in a lazy way, but would appending the execution
args to the name be sufficient? And in which place?
libphobos_load:
---
PASS: libphobos.cycles/mod1.d (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=ignore execution test
PASS: libphobos.cycles/mod1.d (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=abort execution test
PASS: libphobos.cycles/mod1.d (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=print execution test
PASS: libphobos.cycles/mod1.d (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=deprecate execution test
---
libphobos-dg-test:
---
PASS: libphobos.cycles/mod1.d --DRT-oncycle=ignore (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=ignore execution test
PASS: libphobos.cycles/mod1.d --DRT-oncycle=abort (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=abort execution test
PASS: libphobos.cycles/mod1.d --DRT-oncycle=print (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=print execution test
PASS: libphobos.cycles/mod1.d --DRT-oncycle=deprecate (test for excess errors)
PASS: libphobos.cycles/mod1.d --DRT-oncycle=deprecate execution test
---
>From gcc-bugs-return-639409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 20:20:58 2019
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Subject: [Bug middle-end/89921] The dom pass does not respect size of an 'asm' when duplicating BBs
Date: Tue, 02 Apr 2019 20:20:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The code get the correct cost is there (in estimate_num_insns):
case GIMPLE_ASM:
{
int count = asm_str_count (gimple_asm_string (as_a <gasm *> (stmt)));
/* 1000 means infinity. This avoids overflows later
with very long asm statements. */
if (count > 1000)
count = 1000;
/* If this asm is asm inline, count anything as minimum size. */
if (gimple_asm_inline_p (as_a <gasm *> (stmt)))
count = MIN (1, count);
return MAX (1, count);
}
....
/* Return the number of machine instructions likely to be generated for the
inline-asm template. */
int
asm_str_count (const char *templ)
{
int count = 1;
if (!*templ)
return 0;
for (; *templ; templ++)
if (IS_ASM_LOGICAL_LINE_SEPARATOR (*templ, templ)
|| *templ == '\n')
count++;
return count;
}
---- CUT ----
Maybe jump threading (in DOM) is not using estimate_num_insns to get that cost.
>From gcc-bugs-return-639410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 20:27:48 2019
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
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--- Comment #13 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Iain Buclaw from comment #12)
>
> They differ by libphobos_run_args, not by compilation flags.
>
> Maybe I'm running these tests in a lazy way, but would appending the
> execution args to the name be sufficient? And in which place?
>
Actually, I'll just add a compilation flag that does nothing to the test.
>From gcc-bugs-return-639411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 20:39:24 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/89921] The jump threading increases the size a lot when having an huge inline-asm
Date: Tue, 02 Apr 2019 20:39:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Summary|The dom pass does not |The jump threading
|respect size of an 'asm' |increases the size a lot
|when duplicating BBs |when having an huge
| |inline-asm
Severity|normal |enhancement
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
tree-ssa-threadupdate.c only deletes the threaded jumps when optimizing for
size:
/* When optimizing for size, prune all thread paths where statement
duplication is necessary.
We walk the jump thread path looking for copied blocks. There's
two types of copied blocks.
EDGE_COPY_SRC_JOINER_BLOCK is always copied and thus we will
cancel the jump threading request when optimizing for size.
EDGE_COPY_SRC_BLOCK which is copied, but some of its statements
will be killed by threading. If threading does not kill all of
its statements, then we should cancel the jump threading request
when optimizing for size. */
I think there was a discussion about this similar thing on the mailing list
before.
>From gcc-bugs-return-639412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 20:42:43 2019
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Subject: [Bug libstdc++/85184] Remove __glibcxx_assert uses from std::variant
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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Target Milestone|--- |9.0
>From gcc-bugs-return-639413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 20:49:03 2019
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Subject: [Bug c/89933] [7/8/9 Regression] ICE in merge_decls, at c/c-decl.c:2517
Date: Tue, 02 Apr 2019 20:48:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
cc1plus also crashes.
>From gcc-bugs-return-639414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 20:56:51 2019
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Subject: [Bug tree-optimization/79878] verify_gimple_assign_single: replace error with internal_error
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
Two years later, nothing has changed.
As the German translator, I refuse to translate these messages. There is really
nothing a GCC user could take away from a message like "incorrect entry in
label_to_block_map".
>From gcc-bugs-return-639415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 21:06:07 2019
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Subject: [Bug translation/89936] New: wrong punctuation in tree-profile.c
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Bug ID: 89936
Summary: wrong punctuation in tree-profile.c
Product: gcc
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error ("invalid regular expression '%s' in %<%s%>",
Please implement a GCC-specific linter that prohibits single quotes in
messages. These should either be %' if they are meant as punctuation, or %q if
they enclose a placeholder.
Do not just fix this single typo. There are more to come, and they will never
end. I've seen far too many now. Just write a little linter. It's not that
difficult.
>From gcc-bugs-return-639416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 21:11:38 2019
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Subject: [Bug translation/89936] wrong punctuation in tree-profile.c
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
And just in case the punctuation in this particular message is fully
intentional: Please document it why it needs to be exactly this way. It looks
too much like a mistake.
>From gcc-bugs-return-639417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 21:31:56 2019
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Subject: [Bug translation/89936] wrong punctuation in tree-profile.c
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |easyhack
CC| |egallager at gcc dot gnu.org
Blocks| |40883
Severity|normal |trivial
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40883
[Bug 40883] [meta-bug] Translation breakage with trivial fixes
>From gcc-bugs-return-639418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 21:41:06 2019
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Subject: [Bug translation/89936] wrong punctuation in tree-profile.c
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
Just as a reference, I wrote a little linter just for fun 2 years ago. Since it
was February 2017, it was most likely targeted at GCC 7.
https://github.com/rillig/translation-team-de/blob/master/proofread.lua
I'm sure there is a more robust library out there for the same job, only
better. That library could be used to implement the linter I talked about.
>From gcc-bugs-return-639419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 21:41:27 2019
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Subject: [Bug translation/40883] [meta-bug] Translation breakage with trivial fixes
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--- Comment #5 from Roland Illig <roland.illig at gmx dot de> ---
I wouldn't classify bug 89936 as trivial as it strongly recommends to write a
linter, and that might take a while. Especially since the GCC project seems to
avoid these consistency linters; at least that's my impression from the last
few years as the German translator. As I said in bug 89936, there are quite a
few inconsistencies in the messages that could easily be caught by a linter.
>From gcc-bugs-return-639420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 21:42:57 2019
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Subject: [Bug c++/89937] New: For example code, which is valid as either C or C++, optimization seems much better for C
Date: Tue, 02 Apr 2019 21:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89937
Bug ID: 89937
Summary: For example code, which is valid as either C or C++,
optimization seems much better for C
Product: gcc
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I compiled this code with -O2, and with either -x c or -x c++ . The
optimization seems to work much better for C than for C++.
typedef struct TSFastDbgCntl_
{
const char * const tag; // nul-terminated string
const char * const on; // pointer to 1-byte flag
}
TSFastDbgCntl;
TSFastDbgCntl * TSCreateFastDbgCntl(const char *tag);
#include <stdarg.h>
void TSVDebug(const char *tag, const char *fmt, va_list args);
inline void TSFastDbg(TSFastDbgCntl *fd_cntl, const char *fmt, ...)
{
if (fd_cntl->on)
{
va_list ap;
va_start(ap, fmt);
TSVDebug(fd_cntl->tag, fmt, ap);
}
}
void dummy(int i, double d)
{
TSFastDbgCntl *fd_cntl = TSCreateFastDbgCntl("pluggymcplugin");
TSFastDbg(fd_cntl, "Test %d %f", i * 5, d * 7);
TSFastDbg(fd_cntl, "Test fixed string");
}
https://godbolt.org/z/d2MzPo
Note that the difference in optimization of this code for C vs. C++ is similar
for clang/LLVM.
>From gcc-bugs-return-639421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 22:01:58 2019
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Subject: [Bug c++/89937] For example code, which is valid as either C or C++, optimization seems much better for C
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is because of the way inline have different semantics between the two
langauges.
If I change TSFastDbg to be static instead of just inline, then the code
emitted is the same.
In the case of C, since TSFastDbg is not inlined, there exists an out of line
version of it in a different TU.
In the case of C++, TSFastDbg has vague linkage, there for will be emitted but
in a comdat section.
The options you have turned on for godbolt, hide this fact; turning them off
you get:
.Ltext0:
.section
.text._Z9TSFastDbgP14TSFastDbgCntl_PKcz,"axG",@progbits,_Z9TSFastDbgP14TSFastDbgCntl_PKcz,comdat
.p2align 4,,15
.weak _Z9TSFastDbgP14TSFastDbgCntl_PKcz
.type _Z9TSFastDbgP14TSFastDbgCntl_PKcz, @function
_Z9TSFastDbgP14TSFastDbgCntl_PKcz:
See how that is a comdat section.
>From gcc-bugs-return-639422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 22:06:18 2019
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
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--- Comment #14 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Created attachment 46077
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46077&action=edit
Add libphobos_test_name var
I'll just post this before I retired.
>From gcc-bugs-return-639423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 22:08:31 2019
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Subject: [Bug fortran/89938] New: inconsistent wording regarding assumed shape
Date: Tue, 02 Apr 2019 22:08:00 -0000
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Bug ID: 89938
Summary: inconsistent wording regarding assumed shape
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From fortran/expr.c:
gfc_error ("Assumed shape array %qs at %L is not permitted "
"in an initialization expression",
gfc_error ("Assumed-shape array %qs at %L is not permitted "
"in an initialization expression",
Which one is correct, the "assumed shape" or the "assumed-shape"?
>From gcc-bugs-return-639424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 22:50:30 2019
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Subject: [Bug translation/89939] New: messages for translation must not contain embedded macro parameters
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Bug ID: 89939
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macro parameters
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from fortran/frontend-passes.c:
#define B_ERROR(n) _("Incorrect extent in argument B in MATMUL intrinsic in " \
"dimension " #n ": is %ld, should be %ld")
#define C_ERROR(n) _("Array bound mismatch for dimension " #n " of array " \
"(%ld/%ld)")
In the .pot file, this results in:
msgid "Array bound mismatch for dimension "
msgstr ""
This translation entry will never be used. The part after the #n doesn't make
it to the .pot file at all.
Please write a linter that prevents this kind of bug. It's not the first time
I've seen it, and I don't want to remind you every year.
>From gcc-bugs-return-639425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 23:04:19 2019
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Subject: [Bug fortran/89938] inconsistent wording regarding assumed shape
Date: Tue, 02 Apr 2019 23:04:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-02
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Which one is correct, the "assumed shape" or the "assumed-shape"?
The Fortran standard uses "assumed-shape".
Grepping for the strings I see several other places where the spelling is not
done consistently:
gcc/fortran/array.c: gfc_error ("Bad array specification for assumed
shape "
gcc/fortran/array.c: gfc_error ("Bad array specification for assumed
shape "
gcc/fortran/array.c: /* If a lower bounds of an assumed shape array is blank,
put in one. */
gcc/fortran/class.c: /* If strides aren't allowed (not assumed shape or
CONTIGUOUS),
gcc/fortran/decl.c: gfc_error ("Cray Pointee at %C cannot be assumed shape
array");
gcc/fortran/expr.c: gfc_error ("Assumed shape array %qs at %L is
not permitted "
gcc/fortran/gfortran.texi:in place of a value. A pointee cannot be an assumed
shape array.
gcc/fortran/interface.c: "ASSUMED SHAPE ARRAY",
&fsym->declared_at);
gcc/fortran/invoke.texi:In some circumstances GNU Fortran may pass assumed
shape array
gcc/fortran/io.c: gfc_error ("Non-character assumed shape array element
in FORMAT"
gcc/fortran/module.c: read is an index for an assumed shape dummy array (ns
!= 1). */
gcc/fortran/resolve.c: /* Warn if the procedure is non-scalar and not
assumed shape. */
gcc/fortran/resolve.c: "with assumed shape in namelist
%qs at %L",
gcc/fortran/resolve.c: /* Assumed size arrays and assumed shape arrays must be
dummy
gcc/fortran/resolve.c: gfc_error ("Assumed shape array at %L must be a
dummy argument",
gcc/fortran/trans-array.c: /* This should only ever happen when passing an
assumed shape array
gcc/fortran/trans-array.c: /* For assumed shape arrays move the upper
bound by the same amount
gcc/fortran/trans-decl.c: /* Don't try to use the unknown bound for
assumed shape arrays. */
gcc/fortran/trans-expr.c: ALLOCATABLE or assumed shape, we do not use
g77's calling
gcc/fortran/trans-types.c: /* Nor non-constant lower bounds in assumed shape
arrays. */
gcc/fortran/trans-types.c: /* Assumed shape arrays have known lower
bounds. */
>From gcc-bugs-return-639426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 23:18:06 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89927] Inconsistent behavior in std::regex when optimized
Date: Tue, 02 Apr 2019 23:18:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-02
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Right, the program is using std::regex incorrectly, and has undefined
behaviour.
Compiling with -D_GLIBCXX_ASSERTIONS will cause the program to abort at
runtime:
/home/jwakely/gcc/8/include/c++/8.3.1/bits/regex_scanner.tcc:189: void
std::__detail::_Scanner<_CharT>::_M_scan_normal() [with _CharT = char]:
Assertion 'false' failed.
Aborted (core dumped)
It would be good if that assertion was more explanatory, or at least had a
comment saying it will only be reached when given bad input. I'm confirming
this bug as a reminder to improve that some time.
Adding this constructor to basic_regex turns the example into a compile-time
error:
template<size_t _Num>
basic_regex(const value_type*, const value_type(&)[_Num],
flag_type = ECMAScript) = delete;
I don't think that's a good idea though, as it would also cause us to reject
some valid (albeit useless) code like:
const char s[] = ".*";
std::regex r(s, s);
>From gcc-bugs-return-639428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 23:36:52 2019
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Subject: [Bug rtl-optimization/89895] Unable to sink high half of widening multiply out of loop
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-02
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
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Subject: [Bug rtl-optimization/89895] Unable to sink high half of widening multiply out of loop
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-639429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 02 23:54:08 2019
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From: "doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89906] [8 Regression] template template parameter redeclared
Date: Tue, 02 Apr 2019 23:54:00 -0000
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Matthias Klose <doko at debian dot org> changed:
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----------------------------------------------------------------------------
CC| |doko at debian dot org
--- Comment #1 from Matthias Klose <doko at debian dot org> ---
from PR89928:
$ cat main.ii
template <template <typename> class> struct a;
template <template <typename> class T1> struct b { a<T1> c; };
template <template <typename T1, typename T2, typename T3> class F> struct d;
template <template <typename P1, typename P2, typename P3> class F> struct d;
$ g++ -std=c++17 main.ii
main.ii:3:66: error: template parameter 'template<class T1, class T2, class T3>
class F'
template <template <typename T1, typename T2, typename T3> class F> struct d;
^
main.ii:4:76: error: redeclared here as 'template<class P1, class P2, class P3>
class F'
template <template <typename P1, typename P2, typename P3> class F> struct d;
^
works on the trunk.
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Subject: [Bug c++/89928] [8 Regression] errors out in c++17 mode
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--- Comment #3 from Matthias Klose <doko at debian dot org> ---
works on the trunk
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Subject: [Bug c++/89928] [8 Regression] errors out in c++17 mode
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--- Comment #4 from Matthias Klose <doko at debian dot org> ---
caused by r269512, the fix for PR88419.
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Subject: [Bug c++/89906] [8 Regression] template template parameter redeclared
Date: Wed, 03 Apr 2019 00:51:00 -0000
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--- Comment #2 from Matthias Klose <doko at debian dot org> ---
caused by r269512, the fix for PR88419.
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Subject: [Bug c++/88419] [7/8 Regression] [ICE] "Same canonical type node for different types" for CTAD in noexcept
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Matthias Klose <doko at debian dot org> changed:
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CC| |doko at debian dot org
--- Comment #10 from Matthias Klose <doko at debian dot org> ---
this causes PR89928 on the gcc-8 branch.
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Subject: [Bug c++/89917] [8/9 Regression] ICE with lambda in variadic template hierarchy
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-639435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 04:36:03 2019
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Subject: [Bug c++/89940] New: Template substitution causes segfault
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Bug ID: 89940
Summary: Template substitution causes segfault
Product: gcc
Version: 8.2.0
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Created attachment 46078
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46078&action=edit
Preprocessed source file
GCC: 8.20 and 7.3.0
System: Ubuntu 18.04
Target: x86_64-linux-gnu
Command: gcc main.cpp
Output:
main.cpp: In substitution of ‘template<int Y> using C = B<int, Y> [with int Y =
D<W>()]’:
main.cpp:21:13: required from here
main.cpp:12:20: internal compiler error: Segmentation fault
using C = B<int, Y>;
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
The code provided has been simplified to highlight the conditions required to
trigger the error. The segfault requires the following properties:
* X must be dependent on T
* B must be used indirectly through C
* Y must be the result of a constexpr
* W must be an template parameter to D
Changing or omitting any of these conditions (perhaps through manually
inlining) does not trigger the segfault.
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Subject: [Bug c++/89917] [8/9 Regression] ICE with lambda in variadic template hierarchy
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89917
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 3 04:48:45 2019
New Revision: 270111
URL: https://gcc.gnu.org/viewcvs?rev=270111&root=gcc&view=rev
Log:
PR c++/89917 - ICE with lambda in variadic mem-init.
A mem-initializer is not a type, and we don't want to turn autos within it
into packs.
* pt.c (make_pack_expansion): Change type_pack_expansion_p to false.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-variadic8.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
>From gcc-bugs-return-639437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 05:01:04 2019
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81025] [8/9 Regression] gcc ICE while building glibc for MIPS soft-float multi-lib variant
Date: Wed, 03 Apr 2019 05:01:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #16 from Jeffrey A. Law <law at redhat dot com> ---
In response to c#10 and c#11. I suspect you're not able to trigger the
failures because of something in auto-host.h. If I first configure & install
binutils for the target (mips-mti-linux-gnu), then configure gcc for the same
target I can trigger the failures per the instructions in this BZ.
What I'm unable to figure out is my own comment WRT FRAME_RELATED_P from last
year. I don't see any evidence this is at all related to FRAME_RELATED_P insns
in delay slots.
AFAICT we've done shrink wrapping on this case. ISTM there's multiple paths to
the epilogue, some save r16/r17 and adjust the stack pointer, others do not
(according to my reading of the dwarf2cfi pass RTL dump). Thus triggering the
CFI failure due to the inconsistency (not to mention bogus code).
So of course the next thing to do is look at the prologue/epilogue dump and
everything looks fine there. Things also look fine at the .barriers dump.
Then reorg comes along and mucks things up horribly.
The bug here is in reorg and its legacy of trying to compensate for the lack of
a CFG. In particular it has a function skip_consecutive_labels. The idea (of
course) is to have jumps target the last label if there's several in a row.
The code looks something like this:
for (insn = label; insn != 0 && !INSN_P (insn); insn = NEXT_INSN (insn))
if (LABEL_P (insn))
label = insn;
THe loop termination condition allows the code to look through notes and other
random crud.
Now imagine if we have
(code_label 1)
(barrier)
(code_label 2)
(more code)
The BARRIER after a CODE_LABEL can occur due to __builtin_unreachable.
If a jump targets code_label 1, it will be redirected to code_label 2. That's
fine from a runtime standpoint, but runs afoul of the CFI bits. Why?
Consider if the jump which targeted label 1 did not have a prologue (we're
shrink wrapping) and "more code" section is a shrink wrapped epilogue.
The original paths to code_label 2 will have one CFI state while the new paths
to code_label 1 will have a different CFI state and we trip the check.
I'm spinning a fix overnight.
>From gcc-bugs-return-639438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 06:44:09 2019
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From: "m.olbrich at pengutronix dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/89941] New: sanitizer fails to build on mips-unknown-linux-gnu
Date: Wed, 03 Apr 2019 06:44:00 -0000
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Bug ID: 89941
Summary: sanitizer fails to build on mips-unknown-linux-gnu
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: m.olbrich at pengutronix dot de
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
This basically the same as Bug 85663 but for the current trunk version.
The issue was initially introduced in r253887 as noted in that report.
It was then fixed in r259664 but r265665 reverted that fix (probably
accidentally).
Cherry-picking r259664 again fixed the problem for me.
>From gcc-bugs-return-639439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 07:14:03 2019
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Subject: [Bug c++/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 03 Apr 2019 07:14:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me take a look at the issue.
>From gcc-bugs-return-639440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 07:46:17 2019
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/80960] [7/8/9 Regression] Huge memory use when compiling a very large test case
Date: Wed, 03 Apr 2019 07:46:00 -0000
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--- Comment #16 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 2 Apr 2019, segher at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80960
>
> --- Comment #15 from Segher Boessenkool <segher at gcc dot gnu.org> ---
> It seems to be that this happens for huge basic blocks, and the combiner
> tries to combine pairs of instructions that are far apart. This is unlikely
> to work often, and the cost is quadratic in # insns, the way checking where
> a register is used works.
>
> The param to do only 2->1 (and 2->2) combinations should help a lot, make
> combine not take longer than the rest of the compiler does. Does it?
I would guess so. I wonder if the combiner could restrict itself
here? Maybe LUID "distances" are an approximation? Doesn't the
combiner use DF uses so the number of combinations shouldn't increase
with basic-block size but only with the number of uses? Of course
since we don't have SSA the uses probably include those that cross
other defs...
That said, algorithmically first building up a kind-of-SSA to
restrict things combine will try might help to avoid this kind
of issues.
Since combine does a df_analyze we should have a way to record
the number of insns in a block without another IL walk, it could
also fall back to 2->1 and 2->2 insn combinations after visiting
a new PARAM max-combine-bb-insns-3-3 number of insns in an EBB.
Actually it already does two walks over the whole function in
combine_instructions it seems, so recording # insns per EBB should
be possible? (if that's really the key metric causing the issue)
>From gcc-bugs-return-639441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 07:58:47 2019
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Subject: [Bug translation/89936] wrong punctuation in tree-profile.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed. We also have a linter which can be extended to catch wrong usage
apostrophes.
>From gcc-bugs-return-639442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 07:59:40 2019
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From: "kan.liu.229 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89942] New: std::function __is_location_invariant breaks ABI compatibility
Date: Wed, 03 Apr 2019 07:59:00 -0000
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Bug ID: 89942
Summary: std::function __is_location_invariant breaks ABI
compatibility
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
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Created attachment 46079
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46079&action=edit
possible fix
in gcc 5.4.0
template<typename _Tp>
struct __is_location_invariant
: is_trivially_copyable<_Tp>::type
{ };
__is_location_invariant is evaluated to be true for the closure type (lambda
expression)
in gcc 4.9.2
template<typename _Tp>
struct __is_location_invariant
: integral_constant<bool, (is_pointer<_Tp>::value
|| is_member_pointer<_Tp>::value)>
{ };
which is evaluated to be false.
This may break ABI compatibility when pass function object between libs
compiled by 4.9.2 / 5.4.0 gcc.
The attachment is a possible fix.
>From gcc-bugs-return-639443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 08:06:00 2019
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Subject: [Bug sanitizer/89941] sanitizer fails to build on mips-unknown-linux-gnu
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, note that we have a file libsanitizer/LOCAL_PATCHES that is intended
for precisely these revisions. Once we do merge from trunk, we again install
the patches. Lemme do it now.
>From gcc-bugs-return-639444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 08:23:21 2019
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Subject: [Bug c++/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 03 Apr 2019 08:23:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com,
| |jakub at gcc dot gnu.org,
| |uros at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, we probably miss all:
{"avx512vl",F_AVX512VL},
{"avx512bw",F_AVX512BW},
{"avx512dq",F_AVX512DQ},
{"avx512cd",F_AVX512CD},
{"avx512er",F_AVX512ER},
{"avx512pf",F_AVX512PF},
{"avx512vbmi",F_AVX512VBMI},
{"avx512ifma",F_AVX512IFMA},
{"avx5124vnniw",F_AVX5124VNNIW},
{"avx5124fmaps",F_AVX5124FMAPS},
{"avx512vpopcntdq",F_AVX512VPOPCNTDQ},
{"avx512vbmi2", F_AVX512VBMI2},
{"avx512vnni", F_AVX512VNNI},
{"avx512bitalg", F_AVX512BITALG}
I can add all of these, buy I would like to have a comment of an i386 port
maintainer. Does it make sense to add all of them? And how should I prioritize
among them?
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Subject: [Bug c++/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
> In addition, it seems that gcc recognizes this as valid syntax:
>
> __attribute__((target("avx512bw", "avx512f")))
>
> But actually ignores everything after the comma in target's arguments. Not
> sure if I should open another bug for that. Please find a small testcase
> attached.
No, that's documented behavior:
```
Multiple target back ends implement the target attribute to specify that a
function is to be compiled with different target options than specified on the
command line. One or more strings can be provided as arguments. Each string
consists of one or more comma-separated suffixes to the -m prefix jointly
forming the name of a machine-dependent option. See Machine-Dependent Options.
```
It allows you to specify multiple target options.
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Subject: [Bug libstdc++/89942] std::function __is_location_invariant breaks ABI compatibility
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Kan Liu from comment #0)
> This may break ABI compatibility when pass function object between libs
> compiled by 4.9.2 / 5.4.0 gcc.
That's not supported, because the C++11 ABI didn't stabilise until GCC 5.1.0,
see
https://stackoverflow.com/questions/46746878/is-it-safe-to-link-c17-c14-and-c11-objects/49119902#49119902
for a longer explanation.
The attached patch doesn't solve the problem, it just moves it. Now you'd have
ABI incompatibility between GCC 5.x and GCC 5.x, which is even worse.
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Subject: [Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 3 08:46:00 2019
New Revision: 270112
URL: https://gcc.gnu.org/viewcvs?rev=270112&root=gcc&view=rev
Log:
2019-04-03 Richard Biener <rguenther@suse.de>
PR lto/89896
* lto-wrapper.c (run_gcc): Avoid implicit rules making
the all target phony.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lto-wrapper.c
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Subject: [Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 3 08:46:35 2019
New Revision: 270113
URL: https://gcc.gnu.org/viewcvs?rev=270113&root=gcc&view=rev
Log:
2019-04-03 Richard Biener <rguenther@suse.de>
PR lto/89896
* lto-wrapper.c (run_gcc): Avoid implicit rules making
the all target phony.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/lto-wrapper.c
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Subject: [Bug lto/89896] -flto=4 is confused by presence of 'all.c' in a local directory. -flto=1 is not.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |7.4.1, 8.3.1, 9.0
Resolution|--- |FIXED
Known to fail| |7.4.0, 8.3.0
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 3 08:47:19 2019
New Revision: 270114
URL: https://gcc.gnu.org/viewcvs?rev=270114&root=gcc&view=rev
Log:
2019-04-03 Richard Biener <rguenther@suse.de>
PR lto/89896
* lto-wrapper.c (run_gcc): Avoid implicit rules making
the all target phony.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/lto-wrapper.c
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Subject: [Bug c++/89906] [8 Regression] template template parameter redeclared
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Known to work| |8.3.0, 9.0
Keywords| |rejects-valid
Last reconfirmed| |2019-04-03
CC| |jason at gcc dot gnu.org
Blocks| |88419
Ever confirmed|0 |1
Known to fail| |8.3.1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88419
[Bug 88419] [7 Regression] [ICE] "Same canonical type node for different types"
for CTAD in noexcept
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Subject: [Bug c++/89906] [8 Regression] template template parameter redeclared
Date: Wed, 03 Apr 2019 08:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-checking,
| |ice-on-valid-code
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
With checking enabled shows
t.C:10:66: internal compiler error: canonical types differ for identical types
P1’ and ‘T1’
template <template <typename P1, typename P2, typename P3> class F> struct
quote3 {};
^
0xb406fe comptypes(tree_node*, tree_node*, int)
/space/rguenther/src/svn/gcc-8-branch/gcc/cp/typeck.c:1481
0xa5d17a comp_template_parms(tree_node const*, tree_node const*)
/space/rguenther/src/svn/gcc-8-branch/gcc/cp/pt.c:3302
0xb3f3ab structural_comptypes
/space/rguenther/src/svn/gcc-8-branch/gcc/cp/typeck.c:1324
0xb40830 comptypes(tree_node*, tree_node*, int)
/space/rguenther/src/svn/gcc-8-branch/gcc/cp/typeck.c:1498
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Subject: [Bug tree-optimization/89908] Unnecessary rejection of dependence for outer loop vectorisation
Date: Wed, 03 Apr 2019 08:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
Blocks| |53947
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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Subject: [Bug c++/89910] [7/8/9 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:271
Date: Wed, 03 Apr 2019 08:54:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Another FE issue with missing DECL_EXPRs.
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Subject: [Bug c++/89914] [9 Regression] ICE in nothrow_spec_p, at cp/except.c:1238
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----------------------------------------------------------------------------
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Subject: [Bug c++/89913] [7/8/9 Regression] [concepts] ICE with invalid using declaration
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Subject: [Bug middle-end/89911] [9 Regression] ICE in get_attr_nonstring_decl, at calls.c:1502
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Priority|P3 |P1
>From gcc-bugs-return-639458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 08:58:12 2019
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From: "nheart at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 03 Apr 2019 08:58:00 -0000
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--- Comment #4 from Nikolay Bogoychev <nheart at gmail dot com> ---
(In reply to Martin Liška from comment #3)
> > In addition, it seems that gcc recognizes this as valid syntax:
> >
> > __attribute__((target("avx512bw", "avx512f")))
> >
> > But actually ignores everything after the comma in target's arguments. Not
> > sure if I should open another bug for that. Please find a small testcase
> > attached.
>
> No, that's documented behavior:
>
> ```
> Multiple target back ends implement the target attribute to specify that a
> function is to be compiled with different target options than specified on
> the command line. One or more strings can be provided as arguments. Each
> string consists of one or more comma-separated suffixes to the -m prefix
> jointly forming the name of a machine-dependent option. See
> Machine-Dependent Options.
> ```
>
> It allows you to specify multiple target options.
Hey Martin,
Something fishy is going on with multiple attributes. Eg:
__attribute__((target("avx512bw", "avx512f")))
Doesn't compile (expected)
__attribute__((target("avx512f", "avx512bw")))
This actually compiles, but only seems to target the 'f'. The only difference
is reversing the order of the arguments
__attribute__((target("avx512f"), target("avx512bw")))
This doesn't compile again (as expected).
Please look at the second testcase, but you need to uncomment individual
examples to see to see the behaviour. (only leave the default option and the
one being tested)
Cheers,
Nick
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Subject: [Bug c++/89917] [8 Regression] ICE with lambda in variadic template hierarchy
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |8.1.0
Summary|[8/9 Regression] ICE with |[8 Regression] ICE with
|lambda in variadic template |lambda in variadic template
|hierarchy |hierarchy
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Subject: [Bug c++/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89929
--- Comment #5 from Nikolay Bogoychev <nheart at gmail dot com> ---
Created attachment 46080
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46080&action=edit
multiple attributes weirdnes
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Subject: [Bug c++/89919] [8/9 Regression] internal compiler error when building MKL-DNN
Date: Wed, 03 Apr 2019 09:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P3 |P2
Known to work| |7.4.0
Target Milestone|--- |8.4
Summary|internal compiler error |[8/9 Regression] internal
|when building MKL-DNN |compiler error when
| |building MKL-DNN
Known to fail| |8.1.0
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzg5Mzc1XSBmb3J0cmFuL2V4cHIuYzo0NzIzOjU6IHdh?= =?UTF-8?B?cm5pbmc6IGxvZ2ljYWwg4oCYb3LigJkgb2YgZXF1YWwgZXhwcmVzc2lvbnMg?= =?UTF-8?B?Wy1XbG9naWNhbC1vcF0=?Date: Wed, 03 Apr 2019 09:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89375
--- Comment #3 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Wed Apr 3 09:00:27 2019
New Revision: 270115
URL: https://gcc.gnu.org/viewcvs?rev=270115&root=gcc&view=rev
Log:
2019-04-03 Dominique d'Humieres <dominiq@gcc.gnu.org>
PR fortran/89375
* expr.c (comp_pointer): Remove redundant condition.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed.
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Subject: [Bug middle-end/89921] The jump threading increases the size a lot when having an huge inline-asm
Date: Wed, 03 Apr 2019 09:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
CC| |law at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
There is --param max-jump-thread-duplication-stmts but that really only counts
gimple stmts not taking into account their size. It probably should use
stmt_count += estimate_num_insns (stmt, &eni_size_weights);
instead of simply doing stmt_count++ and a similar adjustment in
estimate_threading_killed_stmts.
The existing heuristic probably works reasonable for non-asms and
calls with not too many arguments though.
count_stmts_in_block in path isolations has the same issue (basically
everywhere we count stmts we should use the size estimates as that
is better corresponds to the number of assembler instructions which
is what users expect for documented "statements"?)
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Subject: [Bug middle-end/89922] Loop on fixed size array is not unrolled and poorly optimized at -O2
Date: Wed, 03 Apr 2019 09:13:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
CC| |rguenth at gcc dot gnu.org
Summary|Loop on fixed size array is |Loop on fixed size array is
|not unrolled and poorly |not unrolled and poorly
|optimized |optimized at -O2
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
With -O3 I even see this vectorized to
_Z4testi:
.LFB0:
.cfi_startproc
movabsq $12884901890, %rdx
movl $1, (%rdi)
movq %rdi, %rax
movq %rdx, 8(%rdi)
movl %esi, 4(%rdi)
movdqu (%rdi), %xmm0
paddd .LC0(%rip), %xmm0
movl $8, 16(%rdi)
movups %xmm0, (%rdi)
ret
but no jumps so you must use plain -O2? Here unrolling is only done
if we estimate the code to not grow but the estimate is
Loop size: 7
Estimated size after unrolling: 9
Not unrolling loop 1: size would grow.
so you have to specify -funroll-loops where we get the desired
_Z4testi:
.LFB0:
.cfi_startproc
addl $1, %esi
movl $1, (%rdi)
movq %rdi, %rax
movabsq $25769803780, %rdx
movl %esi, 4(%rdi)
movq %rdx, 8(%rdi)
movl $8, 16(%rdi)
ret
then. For the unrolling heuristic it's hard to see the (partly)
constant initializer.
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Subject: [Bug c++/89923] printf format check and char8_t
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
Ever confirmed|0 |1
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Subject: [Bug c/89926] -Wmain warning about return type doesn't show location of the return type
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug ipa/89924] [missed-optimization] Function not de-virtualized within the same TU
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
CC| |hubicka at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Component|tree-optimization |ipa
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-639468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:16:34 2019
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Subject: [Bug fortran/89925] [9 Regression] Wrong array bounds from ALLOCATE with SOURCE or MOLD
Date: Wed, 03 Apr 2019 09:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-639470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:18:03 2019
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Subject: [Bug c++/89928] [8 Regression] errors out in c++17 mode
Date: Wed, 03 Apr 2019 09:18:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
duplicate.
*** This bug has been marked as a duplicate of bug 89906 ***
>From gcc-bugs-return-639471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:18:04 2019
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Subject: [Bug c++/89906] [8 Regression] template template parameter redeclared
Date: Wed, 03 Apr 2019 09:18:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 89928 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-639473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:20:48 2019
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Subject: [Bug target/67694] ICE on returning undefined enum in must_pass_in_stack_var_size_or_pad
Date: Wed, 03 Apr 2019 09:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |gscfq@t-online.de
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 89932 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-639472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:20:48 2019
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Subject: [Bug target/89932] ICE in must_pass_in_stack_var_size_or_pad, at calls.c:5824
Date: Wed, 03 Apr 2019 09:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 67694 ***
>From gcc-bugs-return-639474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:21:36 2019
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Subject: [Bug c/89933] [7/8/9 Regression] ICE in merge_decls, at c/c-decl.c:2517
Date: Wed, 03 Apr 2019 09:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-639475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:22:00 2019
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Subject: [Bug middle-end/89934] [9 Regression] ICE in tree_fits_uhwi_p, at tree.c:7237
Date: Wed, 03 Apr 2019 09:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Keywords| |diagnostic
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>From gcc-bugs-return-639476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:26:44 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89940] [7/8 Regression] Template substitution causes segfault
Date: Wed, 03 Apr 2019 09:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |6.4.0, 9.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2019-04-03
Ever confirmed|0 |1
Summary|Template substitution |[7/8 Regression] Template
|causes segfault |substitution causes
| |segfault
Target Milestone|--- |7.5
Known to fail| |7.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 6 accepted it, so does clang++ with -std=c++1[14]. Trunk works fine as
well.
>From gcc-bugs-return-639477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:27:48 2019
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Subject: [Bug c++/89910] [7/8/9 Regression] ICE in make_ssa_name_fn, at tree-ssanames.c:271
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Arseny Solokha <asolokha at gmx dot com> changed:
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--- Comment #3 from Arseny Solokha <asolokha at gmx dot com> ---
Likely a duplicate of PR88256?
>From gcc-bugs-return-639478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 09:43:58 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/89905] gcc generates wrong debug information at -Og
Date: Wed, 03 Apr 2019 09:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89905
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-debug
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
Blocks| |82738
Depends on| |89892
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, same issue as PR89892. DCE removes the last real stmt in a BB
which then is removed as a forwarder by CFG cleanup but that has to drop
debug stmts on the floor because there's no place for it to safely insert
them.
Applying the following
Index: gcc/tree-cfgcleanup.c
===================================================================
--- gcc/tree-cfgcleanup.c (revision 270114)
+++ gcc/tree-cfgcleanup.c (working copy)
@@ -565,14 +565,24 @@ remove_forwarder_block (basic_block bb)
}
/* Move debug statements if the destination has a single predecessor. */
- if (can_move_debug_stmts && !gsi_end_p (gsi))
+ if (!gsi_end_p (gsi))
{
+ bool informed = false;
gsi_to = gsi_after_labels (dest);
do
{
gimple *debug = gsi_stmt (gsi);
gcc_assert (is_gimple_debug (debug));
- gsi_move_before (&gsi, &gsi_to);
+ if (can_move_debug_stmts)
+ gsi_move_before (&gsi, &gsi_to);
+ else
+ {
+ if (!informed)
+ inform (gimple_location (debug),
+ "dropping (multiple) debug stmt");
+ informed = true;
+ gsi_next (&gsi);
+ }
}
while (!gsi_end_p (gsi));
}
shows this happens quite a lot :/
> ./xgcc -B. t.c -Og -g -fdump-tree-all -w
t.c: In function ‘i’:
t.c:13:7: note: dropping (multiple) debug stmt
13 | for (; d >= 33;) {
| ^~~
t.c:18:7: note: dropping (multiple) debug stmt
18 | j = b() || m[2];
| ~~^~~~~~~~~~~~~
t.c:17:5: note: dropping (multiple) debug stmt
17 | i++;
| ^
Doing the suggested resetting "fixes" the issue (gdb prints <optimized out>).
Index: gcc/tree-cfgcleanup.c
===================================================================
--- gcc/tree-cfgcleanup.c (revision 270114)
+++ gcc/tree-cfgcleanup.c (working copy)
@@ -564,8 +564,9 @@ remove_forwarder_block (basic_block bb)
gsi_next (&gsi);
}
- /* Move debug statements if the destination has a single predecessor. */
- if (can_move_debug_stmts && !gsi_end_p (gsi))
+ /* Move debug statements. Reset them if the destination does not
+ have a single predecessor. */
+ if (!gsi_end_p (gsi))
{
gsi_to = gsi_after_labels (dest);
do
@@ -573,6 +574,9 @@ remove_forwarder_block (basic_block bb)
gimple *debug = gsi_stmt (gsi);
gcc_assert (is_gimple_debug (debug));
gsi_move_before (&gsi, &gsi_to);
+ if (!can_move_debug_stmts
+ && gimple_debug_bind_p (debug))
+ gimple_debug_bind_reset_value (debug);
}
while (!gsi_end_p (gsi));
}
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82738
[Bug 82738] [meta-bug] issues with the -Og optimization level
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89892
[Bug 89892] gcc generates wrong debug information at -O2
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Subject: [Bug libstdc++/85184] Remove __glibcxx_assert uses from std::variant
Date: Wed, 03 Apr 2019 09:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85184
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 3 09:47:51 2019
New Revision: 270117
URL: https://gcc.gnu.org/viewcvs?rev=270117&root=gcc&view=rev
Log:
PR libstdc++/85184 remove debug assertions from std::variant
The __glibcxx_assert macro should be used to check preconditions that
users must meet, not to check postconditions that the implementation
must meet. We have tests to verify std::variant meets its
postconditions, users shouldn't pay for those checks at runtime.
PR libstdc++/85184
* include/std/variant (_Copy_assign_base, _Move_assign_base, variant):
Remove assertions.
(variant::emplace<_Tp>): Remove result of emplace<N> directly.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/variant
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Subject: [Bug libstdc++/85184] Remove __glibcxx_assert uses from std::variant
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Done.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89877] [ARC] miscompilation due to missing cc clobber in longlong.h: add_ssaaaa()/sub_ddmmss()
Date: Wed, 03 Apr 2019 09:53:00 -0000
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--- Comment #2 from claziss at gcc dot gnu.org ---
Author: claziss
Date: Wed Apr 3 09:53:03 2019
New Revision: 270118
URL: https://gcc.gnu.org/viewcvs?rev=270118&root=gcc&view=rev
Log:
[ARC]PR 88409: miscompilation due to missing cc clobber in longlong.h macros
simple test such as below was failing.
| void main(int argc, char *argv[])
| {
| size_t total_time = 115424; // expected 115.424
| double secs = (double)total_time/(double)1000;
| printf("%s %d %lf\n", "secs", total_time, secs); // prints 113.504
| printf("%d\n", (size_t)secs);
| }
The printf eventually called into glibc stdlib/divrem.c:__mpn_divrem()
which uses the __arc__ specific inline asm macros from longlong.h which
were causing miscompilation.
include/
2019-03-28 Vineet Gupta <vgupta@synopsys.com>
PR 89877
* longlong.h [__arc__] (add_ssaaaa): Add cc clobber
(sub_ddmmss): Likewise.
Signed-off-by: Claudiu Zissulescu <claziss@gmail.com>
Modified:
trunk/include/ChangeLog
trunk/include/longlong.h
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/89892] gcc generates wrong debug information at -O2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testing patch.
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Subject: [Bug debug/89905] gcc generates wrong debug information at -Og
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug debug/88882] gcc generates wrong debug information at -O1
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Depends on| |89892
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Really a duplicate as well.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89892
[Bug 89892] gcc generates wrong debug information at -O2
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Subject: [Bug fortran/47660] Retain warning text of -Wconversion messages when -Wconversion-extra is in effect
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Thomas Henlich <thenlich+gccbug at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Thomas Henlich <thenlich+gccbug at gmail dot com> ---
(In reply to Dominique d'Humieres from comment #2)
> > -Wconversion-extra
> > Warn about implicit conversions between different types and kinds.
> > This option does not imply -Wconversion.
This last sentence was added after 4.6.0 and renders the original complaint
obsolete. "-Wconversion -Wconversion-extra" works as expected. Closing as
Invalid.
>From gcc-bugs-return-639486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 10:15:32 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 03 Apr 2019 10:15:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> Hey Martin,
>
> Something fishy is going on with multiple attributes. Eg:
>
> __attribute__((target("avx512bw", "avx512f")))
"avx512bw" argument is broken right now (and will be fixed).
Using a different one works, e.g.:
$ cat pr89929-3.cc
__attribute__((target("sse2", "avx512f"))) int foo(int i) {
return 1;
}
__attribute__((target("sse3"))) int foo(int i) {
return 2;
}
__attribute__((target("default"))) int foo(int i) {
return 4;
}
int main()
{
return foo(2);
}
$ g++ pr89929-3.cc
[no output]
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Subject: [Bug debug/88882] gcc generates wrong debug information at -O1
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Subject: [Bug debug/88882] gcc generates wrong debug information at -O1
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 89892 ***
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Subject: [Bug debug/82738] [meta-bug] issues with the -Og optimization level
Date: Wed, 03 Apr 2019 10:35:00 -0000
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Bug 82738 depends on bug 89905, which changed state.
Bug 89905 Summary: gcc generates wrong debug information at -Og
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89905
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>From gcc-bugs-return-639488-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 10:35:12 2019
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Subject: [Bug debug/89905] gcc generates wrong debug information at -Og
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 89892 ***
>From gcc-bugs-return-639492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 10:35:29 2019
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Subject: [Bug debug/89892] gcc generates wrong debug information at -O2
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 88882 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-639489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 10:35:13 2019
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Subject: [Bug debug/89892] gcc generates wrong debug information at -O2
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 89905 has been marked as a duplicate of this bug. ***
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Subject: [Bug debug/89892] gcc generates wrong debug information at -O2
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Patch in testing / eventual discussion.
>From gcc-bugs-return-639494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 11:25:54 2019
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From: "aluaces at udc dot es" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89943] New: Submodule functions are not allowed to have C binding
Date: Wed, 03 Apr 2019 11:25:00 -0000
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Bug ID: 89943
Summary: Submodule functions are not allowed to have C binding
Product: gcc
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The submodule
module Foo_mod
interface
module subroutine runFoo4C(ndim) bind(C, name="runFoo")
use, intrinsic :: iso_c_binding
implicit none
integer(c_int32_t) , intent(in) :: ndim
end subroutine runFoo4C
end interface
contains
end module Foo_mod
submodule (Foo_mod) Foo_smod
contains
module subroutine runFoo4C(ndim) bind(C, name="runFoo")
use, intrinsic :: iso_c_binding
implicit none
integer(c_int32_t) , intent(in) :: ndim
end subroutine runFoo4C
end submodule Foo_smod
is giving the following error:
BIND(C) attribute at (1) can only be used for variables or common blocks
That is, so far we cannot have a BIND(C) procedure in the interface of a
submodule.
The discussion at
https://stackoverflow.com/questions/54857067/fortran-c-interoperable-submodule-procedure-with-bindc-reports-error-when-comp
says it should be legal, so it seems it is a bug in gfortran.
>From gcc-bugs-return-639495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 11:37:18 2019
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Subject: [Bug libstdc++/89927] Inconsistent behavior in std::regex when optimized
Date: Wed, 03 Apr 2019 11:37:00 -0000
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Paul le roux <pleroux0 at outlook dot com> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #3 from Paul le roux <pleroux0 at outlook dot com> ---
Okay. I see what went wrong.
The intended code should be
`std::regex(match_name_regex_string, std::regex::icase);`
It is clearly my code that is broken.
For anyone that stumbles upon this and have the same issue:
My code selected this overload (from
https://en.cppreference.com/w/cpp/regex/basic_regex/basic_regex):
`template< class ForwardIt >
basic_regex( ForwardIt first, ForwardIt last,
flag_type f = std::regex_constants::ECMAScript );`
which is wrong and the rest is undefined behavior magic.
Is there a reason why a check can't be put in that also triggers in debug mode
(without `-D_GLIBCXX_ASSERTIONS`)? The path is only taken for invalid input so
it won't affect working code and it will immediately inform anyone precisely
what went wrong.
Something like `assert(false && "c-string terminated with \'\\0\' before
sentinel was reached");` just before or after the `__glibc_assert`.
>From gcc-bugs-return-639496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 12:13:04 2019
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Subject: [Bug fortran/89943] Submodule functions are not allowed to have C binding
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from GGC 6 up to trunk (9.0).
>From gcc-bugs-return-639497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 12:31:23 2019
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Subject: [Bug rtl-optimization/84101] [7/8/9 Regression] -O3 and -ftree-vectorize trying too hard for function returning trivial pair-of-uint64_t-structure
Date: Wed, 03 Apr 2019 12:31:00 -0000
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--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 3 12:30:16 2019
New Revision: 270123
URL: https://gcc.gnu.org/viewcvs?rev=270123&root=gcc&view=rev
Log:
2019-04-03 Richard Biener <rguenther@suse.de>
PR tree-optimization/84101
* tree-vect-stmts.c: Include explow.h for hard_function_value,
regs.h for hard_regno_nregs.
(cfun_returns): New helper.
(vect_model_store_cost): When vectorizing a store to a decl
we return and the function ABI returns in a multi-reg location
account for the possible spilling that will happen.
* gcc.target/i386/pr84101.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr84101.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-stmts.c
>From gcc-bugs-return-639498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 12:31:41 2019
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Subject: [Bug rtl-optimization/84101] [7/8 Regression] -O3 and -ftree-vectorize trying too hard for function returning trivial pair-of-uint64_t-structure
Date: Wed, 03 Apr 2019 12:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Known to work| |6.3.0, 9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Summary|[7/8/9 Regression] -O3 and |[7/8 Regression] -O3 and
|-ftree-vectorize trying too |-ftree-vectorize trying too
|hard for function returning |hard for function returning
|trivial |trivial
|pair-of-uint64_t-structure |pair-of-uint64_t-structure
Known to fail| |7.1.0
--- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mitigation installed on trunk (sofar). Note it's likely not a full solution.
>From gcc-bugs-return-639499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 12:37:24 2019
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
Date: Wed, 03 Apr 2019 12:37:00 -0000
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--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I think that ultimately this boils down to this code in grokdeclarator:
if (type_was_error_mark_node && template_parm_flag)
/* FIXME we should be able to propagate the error_mark_node as is
for other contexts too. */
type = error_mark_node;
else
type = integer_type_node;
where we use integer_type_node as a catch-all type in case of error. Certainly
using error_mark_node avoids this ICE, and many other I suppose, but we are not
ready yet to resolve the FIXME (what about GCC-10?!?). We may want to fix this
specific ICE in a different way, for the time being.
>From gcc-bugs-return-639500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 12:51:52 2019
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Subject: [Bug tree-optimization/89582] Suboptimal code generated for floating point struct in -O3 compare to -O2
Date: Wed, 03 Apr 2019 12:51:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|NEW |ASSIGNED
CC| |jakub at gcc dot gnu.org,
| |law at gcc dot gnu.org,
| |rsandifo at gcc dot gnu.org
Component|target |tree-optimization
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So compared to the already mitigated PR84101 this one returns in
(parallel:TI [
(expr_list:REG_DEP_TRUE (reg:DF 20 xmm0)
(const_int 0 [0]))
(expr_list:REG_DEP_TRUE (reg:DF 21 xmm1)
(const_int 8 [0x8]))
])
so I wonder how targets represent if they return the _same_ value in
two different locations. I also wonder whether the above is any
standard form.
Covering the above in the same way as PR84101 doesn't prevent vectorization:
t.c:8:14: note: Cost model analysis:
Vector inside of basic block cost: 48
Vector prologue cost: 0
Vector epilogue cost: 36
Scalar cost of basic block: 96
t.c:8:14: note: Basic block will be vectorized using SLP
even though we've added one vector store and two scalar loads to pessimize it.
Here the vector construction from the argument passing comes into play
which also isn't "pessimized" accordingly because the vectorizer thinks it
can perform vector loads from memory here, replacing four scalar loads
(but in fact x.x1, y.x1, x.x2 and y.x2 are readily available in %xmm0 to 3).
Another interesting testcase is
typedef struct {
float x1;
float x2;
float x3;
float x4;
} vfloat __attribute__((aligned(16)));
vfloat f(vfloat x, vfloat y)
{
return (vfloat){x.x1 + y.x1, x.x2 + y.x2, x.x3 + y.x3, x.x4 + y.x4};
}
where the _scalar_ code is really awkward (even though for the vector
case the vectorizer still thinks it is all memory). Passing two
floats in a single 8-bytes is a really odd ABI choice:
f:
.LFB0:
.cfi_startproc
movq %xmm0, %rdi
movq %xmm2, %r9
movq %xmm1, %rdx
movq %xmm3, %rcx
shrq $32, %rdi
addss %xmm2, %xmm0
shrq $32, %r9
shrq $32, %rdx
movd %edi, %xmm5
shrq $32, %rcx
movd %r9d, %xmm6
movd %edx, %xmm7
addss %xmm6, %xmm5
movd %ecx, %xmm4
movaps %xmm1, %xmm6
addss %xmm4, %xmm7
addss %xmm3, %xmm6
movd %xmm5, %eax
movq %rax, %rsi
movd %xmm7, %edx
movd %xmm0, %eax
salq $32, %rsi
salq $32, %rdx
movd %xmm6, %ecx
orq %rsi, %rax
orq %rcx, %rdx
movq %rdx, %xmm1
movq %rax, %xmm0
ret
vs. vectorized:
f:
.LFB0:
.cfi_startproc
movq %xmm1, -32(%rsp)
movq %xmm0, -40(%rsp)
movaps -40(%rsp), %xmm4
movq %xmm2, -24(%rsp)
movq %xmm3, -16(%rsp)
addps -24(%rsp), %xmm4
movaps %xmm4, -40(%rsp)
movq -32(%rsp), %rax
movq -40(%rsp), %xmm0
movq %rax, %xmm1
movq %rax, -24(%rsp)
ret
here the spilling is still bad (STLF penalties) but in the end vectorizing
this makes sense and we want to preserve that.
Lame attempt to handle PARALLELs:
Index: gcc/tree-vect-stmts.c
===================================================================
--- gcc/tree-vect-stmts.c (revision 270123)
+++ gcc/tree-vect-stmts.c (working copy)
@@ -1076,23 +1076,24 @@ vect_model_store_cost (stmt_vec_info stm
&& !aggregate_value_p (base, cfun->decl))
{
rtx reg = hard_function_value (TREE_TYPE (base), cfun->decl, 0, 1);
- /* ??? Handle PARALLEL in some way. */
+ int nregs = 1;
if (REG_P (reg))
+ nregs = hard_regno_nregs (REGNO (reg), GET_MODE (reg));
+ /* ??? Handle PARALLEL better (see PR89582 for an example). */
+ else if (GET_CODE (reg) == PARALLEL)
+ nregs = XVECLEN (reg, 0);
+ /* Assume that a single reg-reg move is possible and cheap,
+ do not account for vector to gp register move cost. */
+ if (nregs > 1)
{
- int nregs = hard_regno_nregs (REGNO (reg), GET_MODE (reg));
- /* Assume that a single reg-reg move is possible and cheap,
- do not account for vector to gp register move cost. */
- if (nregs > 1)
- {
- /* Spill. */
- prologue_cost += record_stmt_cost (cost_vec, ncopies,
- vector_store,
- stmt_info, 0, vect_epilogue);
- /* Loads. */
- prologue_cost += record_stmt_cost (cost_vec, ncopies * nregs,
- scalar_load,
- stmt_info, 0, vect_epilogue);
- }
+ /* Spill. */
+ prologue_cost += record_stmt_cost (cost_vec, ncopies,
+ vector_store,
+ stmt_info, 0, vect_epilogue);
+ /* Loads. */
+ prologue_cost += record_stmt_cost (cost_vec, ncopies * nregs,
+ scalar_load,
+ stmt_info, 0, vect_epilogue);
}
}
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Subject: [Bug tree-optimization/89582] Suboptimal code generated for floating point struct in -O3 compare to -O2
Date: Wed, 03 Apr 2019 12:57:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> So compared to the already mitigated PR84101 this one returns in
>
> (parallel:TI [
> (expr_list:REG_DEP_TRUE (reg:DF 20 xmm0)
> (const_int 0 [0]))
> (expr_list:REG_DEP_TRUE (reg:DF 21 xmm1)
> (const_int 8 [0x8]))
> ])
>
> so I wonder how targets represent if they return the _same_ value in
> two different locations. I also wonder whether the above is any
> standard form.
From docs of (set ...):
If @var{lval} is a @code{parallel}, it is used to represent the case of
a function returning a structure in multiple registers. Each element
of the @code{parallel} is an @code{expr_list} whose first operand is a
@code{reg} and whose second operand is a @code{const_int} representing the
offset (in bytes) into the structure at which the data in that register
corresponds. The first element may be null to indicate that the structure
is also passed partly in memory.
I guess if the offset is the same (or overlapping) that can handle
multiple locations for the same value.
For the vfloat testcase the return value on x86 is in the following
(note reg:DI pieces vs. reg:V2SF vs. reg:DF for the vdouble case)
(parallel:TI [
(expr_list:REG_DEP_TRUE (reg:DI 20 xmm0)
(const_int 0 [0]))
(expr_list:REG_DEP_TRUE (reg:DI 21 xmm1)
(const_int 8 [0x8]))
])
>From gcc-bugs-return-639502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 13:03:45 2019
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Subject: [Bug libstdc++/89927] Inconsistent behavior in std::regex when optimized
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please leave the bug open, as I said:
> It would be good if that assertion was more explanatory, or at least had a
> comment saying it will only be reached when given bad input. I'm confirming
> this bug as a reminder to improve that some time.
>From gcc-bugs-return-639503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 13:17:40 2019
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Subject: [Bug c/71598] Wrong optimization with aliasing enums
Date: Wed, 03 Apr 2019 13:17:00 -0000
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--- Comment #15 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Author: clyon
Date: Wed Apr 3 13:17:04 2019
New Revision: 270126
URL: https://gcc.gnu.org/viewcvs?rev=270126&root=gcc&view=rev
Log:
[testsuite] PR71598: Fix testcases
2019-04-13 Christophe Lyon <christophe.lyon@linaro.org>
PR c/71598
* gcc.dg/torture/pr71598-1.c: Skip if short_enums target.
* gcc.dg/torture/pr71598-2.c: Skip if not short_enums target.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr71598-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr71598-2.c
>From gcc-bugs-return-639504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 13:23:29 2019
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Subject: [Bug c++/64095] [C++14] Ellipsis at end of generic lambda parameter-declaration-clause should be parsed as a parameter pack
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Seyyed Soroosh Hosseinalipour <soorosh_abi at hotmail dot com> changed:
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CC| |soorosh_abi at hotmail dot com
--- Comment #15 from Seyyed Soroosh Hosseinalipour <soorosh_abi at hotmail dot com> ---
ITNOA
@jason what is work around for gcc6 ?
thanks
>From gcc-bugs-return-639505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 13:31:48 2019
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Subject: [Bug lto/88643] -Wl,--wrap not supported with LTO
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
A linker patch is posted at
https://sourceware.org/ml/binutils/2019-04/msg00018.html
But it won't work with -O2 since LTO inlines cook before linker can wrap
it.
>From gcc-bugs-return-639506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 13:39:37 2019
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Subject: [Bug tree-optimization/89582] Suboptimal code generated for floating point struct in -O3 compare to -O2
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like LLVM has all the ABI details exposed very early but also in a very
awkward way(?). The vfloat one shows
define { <2 x float>, <2 x float> } @f(<2 x float> %x.coerce0, <2 x float>
%x.coerce1, <2 x float> %y.coerce0, <2 x float> %y.coerce1) #0 {
%1 = alloca %struct.vfloat, align 16
%x = alloca %struct.vfloat, align 16
%y = alloca %struct.vfloat, align 16
%2 = bitcast %struct.vfloat* %x to { <2 x float>, <2 x float> }*
%3 = getelementptr inbounds { <2 x float>, <2 x float> }, { <2 x float>, <2 x
float> }* %2, i32 0, i32 0
store <2 x float> %x.coerce0, <2 x float>* %3, align 16
%4 = getelementptr inbounds { <2 x float>, <2 x float> }, { <2 x float>, <2 x
float> }* %2, i32 0, i32 1
store <2 x float> %x.coerce1, <2 x float>* %4, align 8
%5 = bitcast %struct.vfloat* %y to { <2 x float>, <2 x float> }*
%6 = getelementptr inbounds { <2 x float>, <2 x float> }, { <2 x float>, <2 x
float> }* %5, i32 0, i32 0
store <2 x float> %y.coerce0, <2 x float>* %6, align 16
%7 = getelementptr inbounds { <2 x float>, <2 x float> }, { <2 x float>, <2 x
float> }* %5, i32 0, i32 1
store <2 x float> %y.coerce1, <2 x float>* %7, align 8
for the parameter setup (if I deciper the IL correctly) and
%32 = bitcast %struct.vfloat* %1 to { <2 x float>, <2 x float> }*
%33 = load { <2 x float>, <2 x float> }, { <2 x float>, <2 x float> }* %32,
align 16
ret { <2 x float>, <2 x float> } %33
for the return value.
I was thinking of a way to expose the ABI details to GIMPLE recently
but feared this would look a bit like a mess (also considering
prologue/epilogue expansion target constraints).
>From gcc-bugs-return-639507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 14:14:45 2019
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Subject: [Bug sanitizer/82501] AddressSanitizer does not handle negative offset for first global variable
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--- Comment #31 from Andrey Drobyshev <a.drobyshev at samsung dot com> ---
(In reply to Jakub Jelinek from comment #30)
> in a couple of most common data sections
In which sections exactly? If we cover only the most common ones (thus leaving
other sections which might need protection uncovered) there always be a case
when out patch won't work. On the other hand, if we include all the possible
sections which might need protection, the resulting binary would bloat with
unneeded sections.
>From gcc-bugs-return-639508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 14:18:29 2019
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Subject: [Bug lto/88643] -Wl,--wrap not supported with LTO
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--- Comment #9 from ДилÑн Палаузов <dilyan.palauzov at aegee dot org> ---
With the patch applied to ld.bfd “clang -flto -fuse-ld=bfd -Wl,--wrap=read t.câ€
does work.
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Subject: [Bug lto/88643] -Wl,--wrap not supported with LTO
Date: Wed, 03 Apr 2019 14:26:00 -0000
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--- Comment #10 from ДилÑн Палаузов <dilyan.palauzov at aegee dot org> ---
With the patch applied this works:
clang -flto -fuse-ld=bfd -Wl,--wrap=read -O3 t.c
gcc -flto -fuse-ld=bfd -Wl,--wrap=read -O3 t.c
gcc -flto -fuse-ld=bfd -Wl,--wrap=read -O2 t.c
gcc -flto -fuse-ld=bfd -Wl,--wrap=read -O1 t.c
This does not work:
gcc -flto -fuse-ld=gold -Wl,--wrap=read -O3 t.c
gcc -flto -fuse-ld=gold -Wl,--wrap=read -O2 t.c
gcc -flto -fuse-ld=gold -Wl,--wrap=read -O1 t.c
>From gcc-bugs-return-639510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 14:34:58 2019
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Subject: [Bug lto/88643] -Wl,--wrap not supported with LTO
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--- Comment #11 from ДилÑн Палаузов <dilyan.palauzov at aegee dot org> ---
Reported for ld.gold at https://sourceware.org/bugzilla/show_bug.cgi?id=24415 .
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Subject: [Bug c++/64095] [C++14] Ellipsis at end of generic lambda parameter-declaration-clause should be parsed as a parameter pack
Date: Wed, 03 Apr 2019 14:56:00 -0000
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--- Comment #16 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Seyyed Soroosh Hosseinalipour from comment #15)
> @jason what is work around for gcc6 ?
See comment 6. Name the pack.
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Subject: [Bug fortran/68567] ICE on using wrong defined arrays (different cases/messages)
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Packaging submitted at https://gcc.gnu.org/ml/fortran/2019-04/msg00007.html.
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Subject: [Bug tree-optimization/89582] Suboptimal code generated for floating point struct in -O3 compare to -O2
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
Is this a dup of PR 59464?
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Subject: [Bug c/89798] excessive vector_size silently accepted and truncated
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00108.html
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Subject: [Bug middle-end/89797] ICE on a vector_size (1LU << 33) int variable
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00108.html
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Subject: [Bug c++/89919] [8/9 Regression] internal compiler error when building MKL-DNN
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed on trunk by the patch for 87770.
*** This bug has been marked as a duplicate of bug 87770 ***
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Subject: [Bug c++/87770] [8 Regression] ICE in type_dependent_expression_p, at cp/pt.c:25230
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 89919 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/47488] sorry, unimplemented: string literal in function template signature
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #14 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00000.html
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Subject: [Bug c++/89833] [9 Regression] sorry, unimplemented: string literal in function template signature
Date: Wed, 03 Apr 2019 15:13:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00000.html
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Subject: [Bug c++/89878] same specializations on a zero-initialized struct object as a non-type parameter treated as distinct
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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| |a/show_bug.cgi?id=89833
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Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00000.html
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Subject: [Bug c++/89331] [8/9 Regression] internal compiler error: in build_simple_base_path, at cp/class.c:589
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Stas Sergeev from comment #2)
> (In reply to Jakub Jelinek from comment #1)
> > Simplified testcase:
> > struct A { char a; };
> > struct B : public A { static constexpr int b = __builtin_offsetof (B, a); };
> >
> > clang rejects this too, not really sure if it is valid or not.
>
> Thanks for taking a look!
> A slight off-topic: any idea why even this rejects:
> struct A {
> char a;
> static constexpr int b = __builtin_offsetof (A, a);
> };
>
> and is there any work-around when I want to
> pass offsetof value into a template non-type,
> which also rejects:
> struct A {
> char a;
> B<__builtin_offsetof(A, a)> b;
> };
>
> Does the standard explicitly forbids that, of just gcc?
The standard says that for a standard-layout class, the address of the first
member is the same as the address of the class, so offsetof(A,a) will be 0.
But when we're in the middle of the class definition we don't know yet whether
it's standard-layout, so we can't answer yet. A compiler is allowed to reorder
fields of a non-standard-layout class.
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Subject: [Bug c++/89596] [8/9 regression] Multiple templated conversion operators result in compilation error
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Subject: [Bug c++/89596] [8/9 regression] Multiple templated conversion operators result in compilation error
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed by the patch for 86521.
*** This bug has been marked as a duplicate of bug 86521 ***
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Subject: [Bug c++/86521] [8 Regression] GCC 8 selects incorrect overload of ref-qualified conversion operator template
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Jason Merrill <jason at gcc dot gnu.org> changed:
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CC| |jleahy+gcc at gmail dot com
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 89596 has been marked as a duplicate of this bug. ***
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81025] [8/9 Regression] gcc ICE while building glibc for MIPS soft-float multi-lib variant
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--- Comment #17 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Apr 3 16:03:37 2019
New Revision: 270129
URL: https://gcc.gnu.org/viewcvs?rev=270129&root=gcc&view=rev
Log:
PR rtl-optimization/81025
* reorg.c (skip_consecutive_labels): Do not skip past a BARRIER.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/reorg.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81025] [8 Regression] gcc ICE while building glibc for MIPS soft-float multi-lib variant
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] gcc ICE |[8 Regression] gcc ICE
|while building glibc for |while building glibc for
|MIPS soft-float multi-lib |MIPS soft-float multi-lib
|variant |variant
--- Comment #18 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk. Backporting to gcc-8 would be trivial, but I'm not sure
it's worth the effort.
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Wed, 03 Apr 2019 16:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87431
--- Comment #18 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Proposed new patch posted:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00142.html
>From gcc-bugs-return-639528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 16:28:39 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 03 Apr 2019 16:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89929
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
__attribute__((target("foo"))) can be used in 2 different ways:
1. Enable FOO, which works for both C and C++.
2. Function versioning with FOO, which works only for C++.
2 is a subset of 1. We should improve error message when target
is in 1, but outside of 2.
>From gcc-bugs-return-639529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 16:41:42 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/89934] [9 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
Date: Wed, 03 Apr 2019 16:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89934
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |ice-on-invalid-code
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Summary|[9 Regression] ICE in |[9 Regression] ICE on a
|tree_fits_uhwi_p, at |call with fewer arguments
|tree.c:7237 |to strncpy declared without
| |prototype
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Declaring a built-in function with an incompatible signature is unsafe but GCC
only diagnoses it with -Wextra (starting with GCC 9). Calling a library
function with fewer arguments than it expects is undefined. Calling a
built-in function with fewer arguments is invalid and diagnosed (also starting
in GCC 9) but not rejected.
The call should either be rejected with an error (like Clang does) or replaced
with a trap to avoid the undefined behavior at runtime, but it's too late to
make that change for GCC 9. Hopefully in GCC 10.
In the meantime, let me remove the assumption that the call is valid from the
-Wrestrict pass.
>From gcc-bugs-return-639530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 16:49:54 2019
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Subject: [Bug c/89944] New: [7/8/9 Regression] ICE in mark_jump_label_1, at jump.c:1152
Date: Wed, 03 Apr 2019 16:49:00 -0000
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Bug ID: 89944
Summary: [7/8/9 Regression] ICE in mark_jump_label_1, at
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Product: gcc
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Gives an ICE down to gcc-4.6, gcc-4.5 (and others) accept it :
$ cat z1.c
void buf ()
{
__builtin_setjmp (buf);
__builtin_longjmp (buf, 1);
}
$ gcc-9-20190331 -c z1.c -O0
$
$ gcc-9-20190331 -c z1.c -O2
during RTL pass: cse1
z1.c: In function 'buf':
z1.c:5:1: internal compiler error: in mark_jump_label_1, at jump.c:1152
5 | }
| ^
0x902146 mark_jump_label_1
../../gcc/jump.c:1152
0x901ec9 mark_jump_label_1
../../gcc/jump.c:1212
0x90243d mark_all_labels
../../gcc/jump.c:305
0x90243d rebuild_jump_labels_1
../../gcc/jump.c:74
0x115faa1 rest_of_handle_cse
../../gcc/cse.c:7687
0x115faa1 execute
../../gcc/cse.c:7721
>From gcc-bugs-return-639531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 16:52:39 2019
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Subject: [Bug target/89399] [7/8/9 Regression] ICE: RTL check: expected code 'set', 'clobber' or 'clobber_high', have 'parallel' in combine_reaching_defs, at ree.c:783
Date: Wed, 03 Apr 2019 16:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89399
--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
So I think in the immediate term any time we're using PATTERN (cand->insn) we
really should be using single_set (cand->insn). We already know we've passed
the single_set test when we put the insn onto the candidate list.
I haven't audited all the uses of get_sub_rtx, but the ones I have looked at
look like it's used on the insn we're modifying rather than the candidate insn
(which is the extension we're trying to completely eliminate).
I'm going to spin the change to avoid incorrect uses of PATTERN (cand->insn) in
my tester.
>From gcc-bugs-return-639532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 16:53:24 2019
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Subject: [Bug c/89945] New: [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
Date: Wed, 03 Apr 2019 16:53:00 -0000
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Bug ID: 89945
Summary: [7/8/9 Regression] ICE in gen_lowpart_general, at
rtlhooks.c:63
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Affects gcc-7 upwards at -O[s123], gcc-6 compiles it :
$ cat z1.c
void foo ()
{
void *g[] = {&&a, &&b};
for (unsigned c = 0x1F;; c >>= 1)
{
unsigned d = (long)"a";
long e = 8;
while (e)
{
a: goto *g[c&d];
b: e--;
}
}
}
$ gcc-6 -c z1.c -O2
$ gcc-9-20190331 -c z1.c -O0
$
$ gcc-9-20190331 -c z1.c -O2
during RTL pass: split1
z1.c: In function 'foo':
z1.c:14:1: internal compiler error: in gen_lowpart_general, at rtlhooks.c:63
14 | }
| ^
0xa280f8 gen_lowpart_general(machine_mode, rtx_def*)
../../gcc/rtlhooks.c:63
0xf81f7e gen_split_144(rtx_insn*, rtx_def**)
../../gcc/config/i386/i386.md:8612
0x111247f split_17
../../gcc/config/i386/i386.md:1047
0x1117d94 split_insns(rtx_def*, rtx_insn*)
../../gcc/config/i386/i386.md:13199
0x796b11 try_split(rtx_def*, rtx_insn*, int)
../../gcc/emit-rtl.c:3851
0x9ea901 split_insn
../../gcc/recog.c:2901
0x9eea22 split_all_insns()
../../gcc/recog.c:3005
0x9eeb28 execute
../../gcc/recog.c:3905
>From gcc-bugs-return-639533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 16:59:09 2019
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Subject: [Bug target/89945] [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
Date: Wed, 03 Apr 2019 16:59:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |target
Target Milestone|--- |7.5
>From gcc-bugs-return-639535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:11:35 2019
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Subject: [Bug bootstrap/86518] Strengthen bootstrap comparison by not enabling warnings at stage3
Date: Wed, 03 Apr 2019 17:11:00 -0000
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Bug 86518 depends on bug 86567, which changed state.
Bug 86567 Summary: [8/9 Regression] -Wnonnull/-Wformat/-Wrestrict affect code generation
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86567
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug c++/86567] [8/9 Regression] -Wnonnull/-Wformat/-Wrestrict affect code generation
Date: Wed, 03 Apr 2019 17:11:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |dmalcolm at gcc dot gnu.org
Depends on| |56856
Resolution|--- |FIXED
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 9 by the patch for PR 56856, which removed that call to
maybe_constant_value. Not worth backporting.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56856
[Bug 56856] -Wformat warnings don't show location *within* format string in C++
FE
>From gcc-bugs-return-639536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:13:10 2019
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Subject: [Bug c/89946] New: [8/9 Regression] ICE in assemble_start_function, at varasm.c:1871
Date: Wed, 03 Apr 2019 17:13:00 -0000
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Bug ID: 89946
Summary: [8/9 Regression] ICE in assemble_start_function, at
varasm.c:1871
Product: gcc
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Started with gcc-8 (and values N < 0) :
$ cat z1.c
__attribute__((patchable_function_entry(-1)))
void f () {}
$ gcc-9-20190331 -c z1.c
during RTL pass: final
z1.c: In function 'f':
z1.c:2:1: internal compiler error: in assemble_start_function, at varasm.c:1871
2 | void f () {}
| ^~~~
0xceabe6 assemble_start_function(tree_node*, char const*)
../../gcc/varasm.c:1871
0x7d8e2f rest_of_handle_final
../../gcc/final.c:4655
0x7d8e2f execute
../../gcc/final.c:4737
>From gcc-bugs-return-639537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:20:56 2019
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From: "paolo at luccalug dot it" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89947] New: Resolution of base classes fail for some automatic types in template struct functions
Date: Wed, 03 Apr 2019 17:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89947
Bug ID: 89947
Summary: Resolution of base classes fail for some automatic
types in template struct functions
Product: gcc
Version: 8.2.1
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Created attachment 46081
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46081&action=edit
A minimal testcase
I'm using G++ 8.2.1 installed with the Arch Linux package `gcc
8.2.1+20181127-1`.
```
$ g++ -v
g++ (GCC) 8.2.1 20181127
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
```
A minimal source file that triggers the problem is the following:
```
namespace ns {
struct A { void f(){} };
}
template<typename C> struct B { void f(){} };
struct C : public ns::A, B<C> {};
template<typename T> struct X { // NOTE: no error if X were not a template
C getC() { return C(); } // NOTE: no error if `getC` were outside of
this class
void f() {
// NOTE: no error if we're running this code from outside of
this class: `x.getC().A...`
getC().A::f(); // ‘A’ has not been declared
auto c4 = getC(); c4.A::f(); // ‘A’ has not been declared
decltype(getC()) c5 = getC(); c5.A::f(); // ‘A’ has not been
declared
C c6 = getC(); c6.A::f(); // this one works
getC().B::f(); // ‘template<class C> struct B’ used without
template parameters
auto c1 = getC(); c1.B::f(); // ‘template<class C> struct B’
used without template parameters
decltype(getC()) c2 = getC(); c1.B::f(); // ‘template<class C>
struct B’ used without template parameters
C c3 = getC(); c3.B::f(); // this one works
}
};
int main() {
X<void> x;
x.f();
return 0;
}
```
G++ fails to build it with default options (and any options I tried):
```
$ g++ test.cpp
test.cpp: In member function ‘void X<T>::f()’:
test.cpp:14:10: error: ‘A’ has not been declared
getC().A::f(); // ‘A’ has not been declared
^
test.cpp:15:24: error: ‘A’ has not been declared
auto c4 = getC(); c4.A::f(); // ‘A’ has not been declared
^
test.cpp:16:36: error: ‘A’ has not been declared
decltype(getC()) c5 = getC(); c5.A::f(); // ‘A’ has not been declared
^
test.cpp:19:10: error: ‘template<class C> struct B’ used without template
parameters
getC().B::f(); // ‘template<class C> struct B’ used without template
parameters
^
test.cpp:20:24: error: ‘template<class C> struct B’ used without template
parameters
auto c1 = getC(); c1.B::f(); // ‘template<class C> struct B’ used without
template parameters
^
test.cpp:21:36: error: ‘template<class C> struct B’ used without template
parameters
decltype(getC()) c2 = getC(); c1.B::f(); // ‘template<class C> struct B’
used without template parameters
```
Clang (8.0.0) gives no error, and I believe that's the expected behavior.
>From gcc-bugs-return-639538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:24:42 2019
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Subject: [Bug middle-end/89934] [9 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
Date: Wed, 03 Apr 2019 17:24:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83655,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83603
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also pr83603 and pr83655 for similar errors.
Now that GCC diagnoses calls with incompatible/incorrect arguments to built-ins
declared without a prototype the solution suggested in the review of the fix
for the latter:
https://gcc.gnu.org/ml/gcc-patches/2018-01/msg00244.html
i.e., using gimple_call_builtin_p(), might be worth revisiting for GCC 10
(though it might be obviated by rejecting the incompatible calls or by
replacing them with traps).
>From gcc-bugs-return-639539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:31:20 2019
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Subject: [Bug c++/89948] New: [9 Regression] ICE in fold_convert_loc, at fold-const.c:2430
Date: Wed, 03 Apr 2019 17:31:00 -0000
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Bug ID: 89948
Summary: [9 Regression] ICE in fold_convert_loc, at
fold-const.c:2430
Product: gcc
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Changed between 20190217 and 20190224 :
$ cat z1.cc
void f ()
{
int a = 0;
for (;;)
for (;a=+({break;1;});)
{}
}
$ g++-9-20190217 -c z1.cc
$
$ g++-9-20190224 -c z1.cc
z1.cc: In function 'void f()':
z1.cc:5:25: internal compiler error: in fold_convert_loc, at fold-const.c:2430
5 | for (;a=+({break;1;});)
| ^
0x91f287 fold_convert_loc(unsigned int, tree_node*, tree_node*)
../../gcc/fold-const.c:2429
0x61f440 cxx_eval_constant_expression
../../gcc/cp/constexpr.c:4995
0x6200ac cxx_eval_store_expression
../../gcc/cp/constexpr.c:3678
0x61e18d cxx_eval_constant_expression
../../gcc/cp/constexpr.c:4582
0x6218d4 cxx_eval_outermost_constant_expr
../../gcc/cp/constexpr.c:5280
0x623c30 maybe_constant_value(tree_node*, tree_node*, bool)
../../gcc/cp/constexpr.c:5512
0x62e9b4 cp_fully_fold(tree_node*)
../../gcc/cp/cp-gimplify.c:2165
0x740c5b cp_build_binary_op(op_location_t const&, tree_code, tree_node*,
tree_node*, int)
../../gcc/cp/typeck.c:5539
0x742b1f build_binary_op(unsigned int, tree_code, tree_node*, tree_node*, bool)
../../gcc/cp/typeck.c:4246
0x742b63 cp_truthvalue_conversion(tree_node*)
../../gcc/cp/typeck.c:5866
0x63317e ocp_convert(tree_node*, tree_node*, int, int, int)
../../gcc/cp/cvt.c:844
0x634247 cp_convert(tree_node*, tree_node*, int)
../../gcc/cp/cvt.c:637
0x634247 cp_convert_and_check(tree_node*, tree_node*, int)
../../gcc/cp/cvt.c:656
0x5f7df1 convert_like_real
../../gcc/cp/call.c:7372
0x5f8950 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
../../gcc/cp/call.c:11089
0x738a5a condition_conversion(tree_node*)
../../gcc/cp/typeck.c:5878
0x71f1a4 maybe_convert_cond
../../gcc/cp/semantics.c:1010
0x71f1a4 finish_for_cond(tree_node*, tree_node*, bool, unsigned short)
../../gcc/cp/semantics.c:991
0x6d2690 cp_parser_c_for
../../gcc/cp/parser.c:12148
0x6d2690 cp_parser_for
../../gcc/cp/parser.c:12116
>From gcc-bugs-return-639540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:40:19 2019
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From: "john.boyer at tutanota dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89949] New: Internal compiler error with lambda as template argument
Date: Wed, 03 Apr 2019 17:40:00 -0000
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Bug ID: 89949
Summary: Internal compiler error with lambda as template
argument
Product: gcc
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Since C++20 a template parameter type can be any LiteralType that has strong
structural equality.
Lambdas are classified as a LiteralType since C++17.
Reproducible example of the internal compiler error:
https://godbolt.org/z/UP3gG2.
Relevant cppreference pages:
https://en.cppreference.com/w/cpp/language/template_parameters
https://en.cppreference.com/w/cpp/named_req/LiteralType
>From gcc-bugs-return-639541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:43:34 2019
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Subject: [Bug fortran/89646] [7/8/9 Regression] Spurious actual argument might interfere warning
Date: Wed, 03 Apr 2019 17:43:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I meant "replace the 0".
The replacement could be OPT_Wsurprising (-Wsurprising, included in -Wall) or
OPT_Wextra (-Wextra) or yet a new option.
The warning is tested in gfortran.dg/elemental_dependency_1.f90.
>From gcc-bugs-return-639542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 17:47:32 2019
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Subject: [Bug c/89950] New: attribute aligned ignored with attribute vector_size
Date: Wed, 03 Apr 2019 17:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89950
Bug ID: 89950
Summary: attribute aligned ignored with attribute vector_size
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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When attribute aligned appears in conjunction with attribute vector_size on the
same declaration and when the former specifies a different alignment than the
latter attribute implies, the alignment specified by the former attribute is
ignored.
However, when attribute aligned is specified on a vector (re)declaration
without attribute vector_size, the alignment is honored.
$ cat z.c && gcc -O2 -S -Wall z.c
void f (void)
{
typedef __attribute__ ((vector_size (1024))) int Vec_1k;
typedef __attribute__ ((aligned (256))) Vec_1k V;
_Static_assert (__alignof__ (V) == 256); // passes
_Static_assert (__builtin_has_attribute (V, aligned (256))); // passes
V v;
_Static_assert (__alignof__ (v) == 256); // passes
_Static_assert (__builtin_has_attribute (v, aligned (256))); // passes
}
void g (void)
{
typedef __attribute__ ((aligned (256), vector_size (1024))) int V;
_Static_assert (__alignof__ (V) == 256); // fails
_Static_assert (__builtin_has_attribute (V, aligned (256))); // fails
V v;
_Static_assert (__alignof__ (v) == 256); // fails
_Static_assert (__builtin_has_attribute (v, aligned (256))); // fails
}
z.c: In function ‘g’:
z.c:17:3: error: static assertion failed
17 | _Static_assert (__alignof__ (V) == 256); //
fails
| ^~~~~~~~~~~~~~
z.c:18:3: error: static assertion failed
18 | _Static_assert (__builtin_has_attribute (V, aligned (256))); //
fails
| ^~~~~~~~~~~~~~
z.c:21:3: error: static assertion failed
21 | _Static_assert (__alignof__ (v) == 256); //
fails
| ^~~~~~~~~~~~~~
z.c:22:3: error: static assertion failed
22 | _Static_assert (__builtin_has_attribute (v, aligned (256))); //
fails
| ^~~~~~~~~~~~~~
>From gcc-bugs-return-639543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 18:07:43 2019
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Subject: [Bug fortran/41650] [Cleanup] Use gfc_expr_attr in resolve_allocate_expr/resolve_deallocate_expr
Date: Wed, 03 Apr 2019 18:07:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Is this still valid?
No answer, closing as INVALID.
>From gcc-bugs-return-639544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 18:14:04 2019
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Subject: [Bug fortran/49565] character(kind=4) is emitted as DW_ATE_unsigned, not DW_ATE_unsigned_char
Date: Wed, 03 Apr 2019 18:14:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Frustrating!-(
>From gcc-bugs-return-639545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 18:15:42 2019
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From: "bratsinot at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89951] New: Uncorrect flag for Nehalem / westmere
Date: Wed, 03 Apr 2019 18:15:00 -0000
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Bug ID: 89951
Summary: Uncorrect flag for Nehalem / westmere
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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gcc set uncorrect flags -mavx256-split-unaligned-load and
-mavx256-split-unaligned-store when use -march=native or Nehalem / westmere
arch. Nehalem / westmere don't have AVX instruction set. So program with these
instructions build incorrectly.
For example:
# gcc -march=westmere -Q --help=target ... | grep avx
-mavx [disabled]
<...>
-mavx256-split-unaligned-load [enabled]
-mavx256-split-unaligned-store [enabled]
<...>
>From gcc-bugs-return-639546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 19:01:02 2019
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Subject: [Bug tree-optimization/89730] -flive-patching=inline-only-static should grant always_inline attribute for extern function
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--- Comment #2 from qinzhao at gcc dot gnu.org ---
Author: qinzhao
Date: Wed Apr 3 19:00:25 2019
New Revision: 270134
URL: https://gcc.gnu.org/viewcvs?rev=270134&root=gcc&view=rev
Log:
2019-04-03 qing zhao <qing.zhao@oracle.com>
PR tree-optimization/89730
* ipa-inline.c (can_inline_edge_p): Delete the checking for
-flive-patching=inline-only-static.
(can_inline_edge_by_limits_p): Add the checking for
-flive-patching=inline-only-static and grant always_inline
even when -flive-patching=inline-only-static is specified.
* gcc.dg/live-patching-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/live-patching-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 19:11:36 2019
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Subject: [Bug fortran/67744] [OOP] polymorphic associating entity is refused TBP invocation
Date: Wed, 03 Apr 2019 19:11:00 -0000
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--- Comment #5 from Bader at lrz dot de <Bader at lrz dot de> ---
This is still not fixed in current trunk.
>From gcc-bugs-return-639548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 19:28:17 2019
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From: "krebbel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/89952] New: S/390: Inconsistent CFI info when restoring frame pointer from fpr
Date: Wed, 03 Apr 2019 19:28:00 -0000
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Bug ID: 89952
Summary: S/390: Inconsistent CFI info when restoring frame
pointer from fpr
Product: gcc
Version: 9.0
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Severity: normal
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Created attachment 46082
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46082&action=edit
Testcase
Compiling the attached testcase with GCC built with checking enabled ICEs:
during RTL pass: dwarf2
t.c:10:1: internal compiler error: in maybe_record_trace_start, at
dwarf2cfi.c:2348
}
^
0x13a7649 maybe_record_trace_start
/home/andreas/gcc/gcc/dwarf2cfi.c:2348
0x13a9d6f scan_trace
/home/andreas/gcc/gcc/dwarf2cfi.c:2541
0x13aa40b create_cfi_notes
/home/andreas/gcc/gcc/dwarf2cfi.c:2694
0x13aa40b execute_dwarf2_frame
/home/andreas/gcc/gcc/dwarf2cfi.c:3057
0x13aa40b execute
/home/andreas/gcc/gcc/dwarf2cfi.c:3545
There is an edge from very early in the function to right before the call to
"j" which is executed as sibcall. In between the hard frame pointer (r11) is
saved to and FPR, set to the stack pointer and restored from the FPR. After
restoring the hard frame pointer register to its former value the backend
misses to set the CFA register back to r15. That's why the sibcall insn can be
reached with the CFA register being either r11 or r15.
>From gcc-bugs-return-639549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 19:28:26 2019
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Subject: [Bug middle-end/89934] [9 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00149.html
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Subject: [Bug target/89952] S/390: Inconsistent CFI info when restoring frame pointer from fpr
Date: Wed, 03 Apr 2019 19:29:00 -0000
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--- Comment #1 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Created attachment 46083
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46083&action=edit
Experimental patch
>From gcc-bugs-return-639551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 19:39:08 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/89946] [8/9 Regression] ICE in assemble_start_function, at varasm.c:1871
Date: Wed, 03 Apr 2019 19:39:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-03
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The ICE first appeared in r250521 when the attribute was added.
The handler for the attributes does no validation:
static tree
handle_patchable_function_entry_attribute (tree *, tree, tree, int, bool *)
{
/* Nothing to be done here. */
return NULL_TREE;
}
With struct attribute_spec extended to describe basic properties of attribute
arguments besides just their number, basic attribute argument validation could
be done in decl_attributes, similarly to how mutually exclusive attributes are
handled.
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Subject: [Bug fortran/84487] [8/9 Regression] Large rodate section increase in 465.tonto with r254427
Date: Wed, 03 Apr 2019 19:49:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #22 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This patch
Index: trans-decl.c
===================================================================
--- trans-decl.c (Revision 269895)
+++ trans-decl.c (Arbeitskopie)
@@ -1863,10 +1863,6 @@ gfc_get_symbol_decl (gfc_symbol * sym)
if (sym->attr.associate_var)
GFC_DECL_ASSOCIATE_VAR_P (decl) = 1;
- if (sym->attr.vtab
- || (sym->name[0] == '_' && gfc_str_startswith (sym->name,
"__def_init")))
- TREE_READONLY (decl) = 1;
-
return decl;
}
leads to
FAIL: gfortran.dg/gomp/pr52531.f90 -O (test for excess errors)
Excess errors:
/home/ig25/Gcc/trunk/gcc/testsuite/gfortran.dg/gomp/pr52531.f90:10:0: Error:
'__vtab_test_mod_Test_type' not specified in enclosing 'parallel'
/home/ig25/Gcc/trunk/gcc/testsuite/gfortran.dg/gomp/pr52531.f90:9:0: Error:
enclosing 'parallel'
where I have no idea if this is just a cosmetic bug which
can, for example, be shut up with a check for attr.artificial,
or if this points towards a real problem.
Jakub, could you maybe shed any light?
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Subject: [Bug c++/89947] Resolution of base classes fail for some automatic types in template struct functions
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang and EDG both accept it. Doesn't seem to be a regression.
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Wed, 03 Apr 2019 20:02:00 -0000
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--- Comment #20 from Erik Schnetter <schnetter at gmail dot com> ---
I have a patch that works for 8.3.0. It doesn't work for 9.0.0 (i.e. an svn
checkout); I'm working on this.
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Subject: [Bug c++/89331] [8/9 Regression] internal compiler error: in build_simple_base_path, at cp/class.c:589
Date: Wed, 03 Apr 2019 20:09:00 -0000
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 3 20:09:17 2019
New Revision: 270135
URL: https://gcc.gnu.org/viewcvs?rev=270135&root=gcc&view=rev
Log:
PR c++/89331 - ICE with offsetof in incomplete class.
We were aborting when build_base_path returned an error because of the
derived class not being complete yet, which wasn't considered by the assert.
Fixed by checking for complete type first. The semantics.c change avoids
a duplicate error message.
* semantics.c (finish_offsetof): Handle error_mark_node.
* typeck.c (build_class_member_access_expr): Call
complete_type_or_maybe_complain before converting to base.
Added:
trunk/gcc/testsuite/g++.dg/ext/builtin-offsetof4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/semantics.c
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/g++.dg/other/offsetof8.C
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86586] [7/8/9 Regression] -Wsign-compare affects code generation
Date: Wed, 03 Apr 2019 20:12:00 -0000
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--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 3 20:12:00 2019
New Revision: 270136
URL: https://gcc.gnu.org/viewcvs?rev=270136&root=gcc&view=rev
Log:
PR c++/86586 - -fcompare-debug=-Wsign-compare.
This patch limits constexpr folding for -Wsign-compare to only cases that we
would warn for without considering constant values, avoiding the folding in
the testcase in question.
gcc/c-family/
* c-warn.c (warn_for_sign_compare): Call fold_for_warn.
gcc/cp/
* typeck.c (cp_build_binary_op): Don't fold for -Wsign-compare.
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-warn.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/g++.target/i386/mv1.C
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Subject: [Bug bootstrap/86518] Strengthen bootstrap comparison by not enabling warnings at stage3
Date: Wed, 03 Apr 2019 20:14:00 -0000
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Bug 86518 depends on bug 86586, which changed state.
Bug 86586 Summary: [7/8/9 Regression] -Wsign-compare affects code generation
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86586
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug c++/86586] [7/8/9 Regression] -Wsign-compare affects code generation
Date: Wed, 03 Apr 2019 20:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86586
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jason at gcc dot gnu.org
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Target Milestone|7.5 |9.0
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 9 by not folding on this testcase. This doesn't address the
general issue, but reduces its scope. Not worth backporting.
>From gcc-bugs-return-639559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 20:23:31 2019
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Subject: [Bug c++/89953] New: ICE in nothrow_spec_p, at cp/except.c:1244
Date: Wed, 03 Apr 2019 20:23:00 -0000
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Bug ID: 89953
Summary: ICE in nothrow_spec_p, at cp/except.c:1244
Product: gcc
Version: 9.0
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Using gcc-9 20190331_1 experimental on mac osx causes ICE.
The respective code works fine with gcc7 and gcc8.
I added the preprocessed source in the attachment.
Let me know if you need more information or if I need to reduce it to a minimal
code example that triggers the ICE.
GCC Version:
GNU C++17 (MacPorts gcc9 9-20190331_1) version 9.0.1 20190331 (experimental)
(x86_64-apple-darwin18)
Here the build log:
Using built-in specs.
COLLECT_GCC=/opt/local/bin/g++-mp-9
Target: x86_64-apple-darwin18
Configured with:
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/gcc9/work/gcc-9-20190331/configure
--prefix=/opt/local --build=x86_64-apple-darwin18
--enable-languages=c,c++,objc,obj-c++,lto,fortran --libdir=/opt/local/lib/gcc9
--includedir=/opt/local/include/gcc9 --infodir=/opt/local/share/info
--mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-9
--with-local-prefix=/opt/local --with-system-zlib --disable-nls
--program-suffix=-mp-9 --with-gxx-include-dir=/opt/local/include/gcc9/c++/
--with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local
--with-isl=/opt/local --enable-stage1-checking --disable-multilib --enable-lto
--enable-libstdcxx-time --with-build-config=bootstrap-debug
--with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld
--with-ar=/opt/local/bin/ar --with-bugurl=https://trac.macports.org/newticket
--disable-tls --with-pkgversion='MacPorts gcc9 9-20190331_1'
--with-sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
Thread model: posix
gcc version 9.0.1 20190331 (experimental) (MacPorts gcc9 9-20190331_1)
COLLECT_GCC_OPTIONS='-I'
'/Users/rmaerker/Development/seqan3/seqan3-build/unit/vendor/googletest/googletest/include'
'-I' '/Users/rmaerker/Development/seqan3/seqan3-src/test/include' '-I'
'/Users/rmaerker/Development/seqan3/seqan3-src/include' '-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/sdsl-lite/include'
'-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include'
'-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/lemon/include'
'-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/cereal/include'
'-isystem' '/opt/local/include' '-g' '-isysroot'
'/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk'
'-Wpedantic' '-Wall' '-Wextra' '-Werror' '-std=c++17' '-fconcepts' '-v'
'-save-temps' '-o' 'CMakeFiles/view_get_test.dir/view_get_test.cpp.o' '-c'
'-mmacosx-version-min=10.14.0' '-asm_macosx_version_min=10.14' '-shared-libgcc'
'-mtune=core2'
/opt/local/libexec/gcc/x86_64-apple-darwin18/9.0.1/cc1plus -E -quiet -v -I
/Users/rmaerker/Development/seqan3/seqan3-build/unit/vendor/googletest/googletest/include
-I /Users/rmaerker/Development/seqan3/seqan3-src/test/include -I
/Users/rmaerker/Development/seqan3/seqan3-src/include -D__DYNAMIC__ -isystem
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/sdsl-lite/include
-isystem
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include
-isystem /Users/rmaerker/Development/seqan3/seqan3-src/submodules/lemon/include
-isystem
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/cereal/include
-isystem /opt/local/include -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
/Users/rmaerker/Development/seqan3/seqan3-src/test/unit/range/view/view_get_test.cpp
-fPIC -feliminate-unused-debug-symbols -mmacosx-version-min=10.14.0
-mtune=core2 -std=c++17 -Wpedantic -Wall -Wextra -Werror -fconcepts -g
-fworking-directory -fpch-preprocess -o view_get_test.ii
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/opt/local/include"
ignoring nonexistent directory
"/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.0.1/../../../../../x86_64-apple-darwin18/include"
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
/Users/rmaerker/Development/seqan3/seqan3-build/unit/vendor/googletest/googletest/include
/Users/rmaerker/Development/seqan3/seqan3-src/test/include
/Users/rmaerker/Development/seqan3/seqan3-src/include
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/sdsl-lite/include
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/lemon/include
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/cereal/include
/opt/local/include
/opt/local/include/gcc9/c++/
/opt/local/include/gcc9/c++//x86_64-apple-darwin18
/opt/local/include/gcc9/c++//backward
/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.0.1/include
/opt/local/lib/gcc9/gcc/x86_64-apple-darwin18/9.0.1/include-fixed
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/System/Library/Frameworks
End of search list.
COLLECT_GCC_OPTIONS='-I'
'/Users/rmaerker/Development/seqan3/seqan3-build/unit/vendor/googletest/googletest/include'
'-I' '/Users/rmaerker/Development/seqan3/seqan3-src/test/include' '-I'
'/Users/rmaerker/Development/seqan3/seqan3-src/include' '-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/sdsl-lite/include'
'-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include'
'-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/lemon/include'
'-isystem'
'/Users/rmaerker/Development/seqan3/seqan3-src/submodules/cereal/include'
'-isystem' '/opt/local/include' '-g' '-isysroot'
'/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk'
'-Wpedantic' '-Wall' '-Wextra' '-Werror' '-std=c++17' '-fconcepts' '-v'
'-save-temps' '-o' 'CMakeFiles/view_get_test.dir/view_get_test.cpp.o' '-c'
'-mmacosx-version-min=10.14.0' '-asm_macosx_version_min=10.14' '-shared-libgcc'
'-mtune=core2'
/opt/local/libexec/gcc/x86_64-apple-darwin18/9.0.1/cc1plus -fpreprocessed
view_get_test.ii -fPIC -feliminate-unused-debug-symbols -quiet -dumpbase
view_get_test.cpp -mmacosx-version-min=10.14.0 -mtune=core2 -auxbase-strip
CMakeFiles/view_get_test.dir/view_get_test.cpp.o -g -Wpedantic -Wall -Wextra
-Werror -std=c++17 -version -fconcepts -o view_get_test.s
GNU C++17 (MacPorts gcc9 9-20190331_1) version 9.0.1 20190331 (experimental)
(x86_64-apple-darwin18)
compiled by GNU C version 9.0.1 20190331 (experimental), GMP version
6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.20-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++17 (MacPorts gcc9 9-20190331_1) version 9.0.1 20190331 (experimental)
(x86_64-apple-darwin18)
compiled by GNU C version 9.0.1 20190331 (experimental), GMP version
6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.20-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: fa24992ac719ee0bb1ae6edc02d07cca
In file included from
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include/range/v3/range/traits.hpp:23,
from
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include/range/v3/range/concepts.hpp:23,
from
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include/range/v3/view/all.hpp:19,
from
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include/range/v3/view/zip.hpp:24,
from
/Users/rmaerker/Development/seqan3/seqan3-src/test/unit/range/view/view_get_test.cpp:12:
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include/range/v3/range/access.hpp:
In substitution of 'template<class R> using _t = decltype
(ranges::_begin_::fn{}(declval<R>())) [with R = const
std::vector<seqan3::qualified<seqan3::dna4, seqan3::phred42> >&]':
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include/range/v3/range/access.hpp:178:110:
required from here
/Users/rmaerker/Development/seqan3/seqan3-src/submodules/range-v3/include/range/v3/range/access.hpp:149:33:
internal compiler error: in nothrow_spec_p, at cp/except.c:1244
149 | using _t = decltype(fn{}(std::declval<R>()));
| ~~~~^~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-639560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 20:34:57 2019
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81866] [7/8/9 Regression] ICE with a default template parameter which is a template class nested in a template class
Date: Wed, 03 Apr 2019 20:34:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
>From gcc-bugs-return-639561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 20:46:55 2019
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
Date: Wed, 03 Apr 2019 20:46:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #36 from Jeffrey A. Law <law at redhat dot com> ---
My combiner-fu is old and getting dated. But I wonder if we're writing off
zero_extract too quickly.
For the first test in insv1 (and I suspect others are similar) we get into
make_field_assignment with something *almost* usable. In particular:
(set (reg/i:DI 0 x0)
(ior:DI (and:DI (reg:DI 95)
(const_int -256 [0xffffffffffffff00]))
(const_int 3 [0x3])))
The only reason this isn't going to be recognized as a field assignment is
because we don't have a RMW. But we can trivially turn that into a RMW by
emitting a copy from reg95 to reg0 and changing the source to reg0.
That runs afoul of the general direction we're taking WRT hard registers, so
another choice might be to use an existing pseudo that we know is going to die
-- reg92 in this case which isn't seen in the extraction pattern. So we'd copy
reg95 into reg92 before the extraction and change the source & destination in
the extraction to reg92. Then copy reg92 into reg0 after the extraction.
I wonder if we could pass in a scratch register from try_combine down to
make_field_assignment to facilitate something like this...
>From gcc-bugs-return-639562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 21:20:41 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
Date: Wed, 03 Apr 2019 21:20:00 -0000
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--- Comment #37 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #36)
> I wonder if we could pass in a scratch register from try_combine down to
> make_field_assignment to facilitate something like this...
I have found that make_field_assignment needs a lot of work in the past. I had
a few patches to make_field_assignment to improve it in the GCC 4.3 days but
never updated them for newer compiler versions as the code generationg which I
was fixing up was already fixed; it was for some bad generated SRA issue.
Maybe for GCC 10, I will look into improving make_field_assignment.
>From gcc-bugs-return-639563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 21:32:49 2019
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Subject: [Bug fortran/68567] ICE on using wrong defined arrays (different cases/messages)
Date: Wed, 03 Apr 2019 21:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68567
--- Comment #9 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Wed Apr 3 21:32:13 2019
New Revision: 270137
URL: https://gcc.gnu.org/viewcvs?rev=270137&root=gcc&view=rev
Log:
2019-04-03 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/68567
* expr.c (gfc_reduce_init_expr): Add extra check to avoid
dereferencing a null pointer.
2019-04-03 Dominique d'Humieres <dominiq@gcc.gnu.org>
PR fortran/68567
* gfortran.dg/parameter_array_error_1.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/parameter_array_error_1.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/68567] ICE on using wrong defined arrays (different cases/messages)
Date: Wed, 03 Apr 2019 21:39:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed.
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Subject: [Bug c++/81866] [7/8 Regression] ICE with a default template parameter which is a template class nested in a template class
Date: Wed, 03 Apr 2019 21:52:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] ICE with |[7/8 Regression] ICE with a
|a default template |default template parameter
|parameter which is a |which is a template class
|template class nested in a |nested in a template class
|template class |
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed on trunk so far.
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Subject: [Bug c++/81866] [7/8/9 Regression] ICE with a default template parameter which is a template class nested in a template class
Date: Wed, 03 Apr 2019 21:52:00 -0000
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Apr 3 21:51:36 2019
New Revision: 270138
URL: https://gcc.gnu.org/viewcvs?rev=270138&root=gcc&view=rev
Log:
PR c++/81866 - ICE with member template and default targ.
This testcase manages to find a way to look up the partial instantiation of
B for the default argument of C before we've created the partial
instantiation of B as part of the normal instantiation of the members of A.
Which we can deal with, but we were getting confused because the partial
instantiation was stored with a RECORD_TYPE specialization rather than
TEMPLATE_DECL.
* pt.c (tsubst_template_decl): Handle getting a type from
retrieve_specialization.
Added:
trunk/gcc/testsuite/g++.dg/template/memtmpl6.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/89331] [8/9 Regression] internal compiler error: in build_simple_base_path, at cp/class.c:589
Date: Wed, 03 Apr 2019 21:57:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 9.
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Subject: [Bug fortran/89938] inconsistent wording regarding assumed shape
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Created attachment 46084
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46084&action=edit
Hyphen compounds: assumed shape and other related ones
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Subject: [Bug fortran/89938] inconsistent wording regarding assumed shape
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Created attachment 46085
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46085&action=edit
Adjust the tests
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Subject: [Bug fortran/89938] inconsistent wording regarding assumed shape
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |dominiq at lps dot ens.fr
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Hyphen compounds: assumed shape and other related ones
I have found several such compounds and I have added hyphens based on the
pattern
assumed-shape arrays have assumed shape.
I have also done the changes in the comments. This has been done manually and I
may
have made mistakes, so it would be nice if someone looks at the patch.
I know I have missed
gcc/fortran/resolve.c: gfc_error ("The object %qs at %L with ASSUMED type
parameters "
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Subject: [Bug fortran/89938] inconsistent wording regarding assumed shape
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
gcc/testsuite/gfortran.dg/pdt_4.f03: type(modtype(8,*)) :: mod_r ! {
dg-error "ASSUMED type parameters" }
The test is not part of the attached patch.
>From gcc-bugs-return-639572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 22:41:58 2019
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Subject: [Bug c++/89331] [8/9 Regression] internal compiler error: in build_simple_base_path, at cp/class.c:589
Date: Wed, 03 Apr 2019 22:41:00 -0000
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--- Comment #7 from Stas Sergeev <stsp at users dot sourceforge.net> ---
(In reply to Jason Merrill from comment #4)
> But when we're in the middle of the class definition we don't know yet
> whether it's standard-layout, so we can't answer yet. A compiler is allowed
> to reorder fields of a non-standard-layout class.
Thanks, that clears some things for me.
I definitely am not going to turn this ticket
into a forum, but I am still puzzled why the
below works (on gcc at least, not on clang):
---
#include <cstddef>
#include <iostream>
class L {};
template <typename T, L (T::*M)[0]>
struct offset_of {
constexpr operator size_t() const {
return (std::uintptr_t)&(((T*)nullptr)->*M);
}
};
template <typename T, L (T::*M)[0]>
struct B {
char aa;
static const int off = offset_of<T, M>();
};
struct A {
char a;
L _mark[0];
B<A, &A::_mark> b;
};
int main()
{
A a;
std::cout << "size " << sizeof(A) << " off " << a.b.off << std::endl;
return 0;
}
---
Here I do 2 emulation tricks.
I use address-of on the zero-sized mark to emulate
offsetof() in the not yet fully defined class.
And I use reinterpret cast in a constexpr to emulate
offsetof() that doesn't want to work with the template
arguments for some reason.
This works perfectly on gcc (I filled a bug report to clang).
So if the emulation works, why doesn't the original?
Are there any possibility to somehow extend __builtin_offsetof()
to cover either of those 2 cases where I currently have
to emulate it? While I understand the problem you described,
why does the above example avoids it?
>From gcc-bugs-return-639573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 23:04:29 2019
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Subject: [Bug d/89823] Composed message only partially translatable
Date: Wed, 03 Apr 2019 23:04:00 -0000
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----------------------------------------------------------------------------
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--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
For now, translation is not required as of r270074.
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Subject: [Bug translation/40883] [meta-bug] Translation breakage with trivial fixes
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Bug 40883 depends on bug 89823, which changed state.
Bug 89823 Summary: Composed message only partially translatable
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89823
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>From gcc-bugs-return-639575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 03 23:12:27 2019
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
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--- Comment #15 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Created attachment 46086
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46086&action=edit
patch for pr89255
Tracked down hang in std.net.curl module ctor/dtors inside version(unittest)
code are now added to test module info record.
Posting new patch with all so far.
>From gcc-bugs-return-639576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 00:26:48 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #38 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #37)
> (In reply to Jeffrey A. Law from comment #36)
> > I wonder if we could pass in a scratch register from try_combine down to
> > make_field_assignment to facilitate something like this...
>
> I have found that make_field_assignment needs a lot of work in the past. I
> had a few patches to make_field_assignment to improve it in the GCC 4.3 days
> but never updated them for newer compiler versions as the code generationg
> which I was fixing up was already fixed; it was for some bad generated SRA
> issue.
> Maybe for GCC 10, I will look into improving make_field_assignment.
Also I should mention I tried in the past having make_field_assignment making a
sequence of instructions (two) where one was the assignment and the second one
was the zero_extract assignment. This was done in the 4.7 days. I could not
fix the rest of combine doing the correct thing and had to give up as I was
running out of time before a release was needed to be made. I will try again.
This was exactly what you were asking to do to make_field_assignment too.
>From gcc-bugs-return-639577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 01:14:24 2019
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Subject: [Bug c++/89937] For example code, which is valid as either C or C++, optimization seems much better for C
Date: Thu, 04 Apr 2019 01:14:00 -0000
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--- Comment #2 from Walt Karas <wkaras at yahoo dot com> ---
(In reply to Andrew Pinski from comment #1)
> This is because of the way inline have different semantics between the two
> langauges.
>
> If I change TSFastDbg to be static instead of just inline, then the code
> emitted is the same.
> In the case of C, since TSFastDbg is not inlined, there exists an out of
> line version of it in a different TU.
> In the case of C++, TSFastDbg has vague linkage, there for will be emitted
> but in a comdat section.
>
> The options you have turned on for godbolt, hide this fact; turning them off
> you get:
>
> .Ltext0:
> .section
> .text._Z9TSFastDbgP14TSFastDbgCntl_PKcz,"axG",@progbits,
> _Z9TSFastDbgP14TSFastDbgCntl_PKcz,comdat
> .p2align 4,,15
> .weak _Z9TSFastDbgP14TSFastDbgCntl_PKcz
> .type _Z9TSFastDbgP14TSFastDbgCntl_PKcz, @function
> _Z9TSFastDbgP14TSFastDbgCntl_PKcz:
>
> See how that is a comdat section.
Hmmm it seems you are saying that inline (or weak linkage by any other name) in
C++ somehow prohibits inlining. I thought that, in C++, a weak linkage
function may or may not be inlined. If it isn't, its object code must be in a
vague linkage section. But there is no requirement for its object code to
appear in a vague linkage section, is there?
>From gcc-bugs-return-639578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 01:19:54 2019
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Subject: [Bug middle-end/89934] [9 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
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JunMa <JunMa at linux dot alibaba.com> changed:
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--- Comment #5 from JunMa <JunMa at linux dot alibaba.com> ---
similar issue in pr89911
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Subject: [Bug c/89954] New: missed optimization for signed extension for x86-64
Date: Thu, 04 Apr 2019 01:31:00 -0000
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Bug ID: 89954
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This code snippet
/////////////////////
char c;
int f()
{
return c ^ 1;
}
/////////////////////
is compiled into these instructions with options "-O2 -S"
;;;;;;;;;;;;;;;;;;;;;
movq _c@GOTPCREL(%rip), %rax
movzbl (%rax), %eax
xorl $1, %eax
movsbl %al, %eax
;;;;;;;;;;;;;;;;;;;;;
Only movsbl is needed because xor by 1 doesn't change high bits.
>From gcc-bugs-return-639580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 01:35:21 2019
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Subject: [Bug target/89954] missed optimization for signed extension for x86-64
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-linux-gnu
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-04
Component|c |target
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
Though AARCH64 does the right thing though:
f:
adrp x0, c
ldrb w0, [x0, #:lo12:c]
eor w0, w0, 1
ret
>From gcc-bugs-return-639581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 01:37:22 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #10 from 康 çŠ <kangshan0910 at hotmail dot com> ---
Hi Martin Liška, I tried to build it with "-O3 -fno-strict-aliasing
-falign-functions=32 -fno-math-errno -fno-semantic-interposition
-fno-trapping-math", but it still had the issue. Can "-fno-strict-aliasing"
work normally with "-O3"?
>From gcc-bugs-return-639582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 01:47:33 2019
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Subject: [Bug rtl-optimization/86928] ICE in compute_live, at sel-sched.c:3097
Date: Thu, 04 Apr 2019 01:47:00 -0000
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #5)
> I didn't have any better ideas, so fixed via comment #2.
Thanks!
>From gcc-bugs-return-639583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 02:00:54 2019
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Subject: [Bug rtl-optimization/80960] [7/8/9 Regression] Huge memory use when compiling a very large test case
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--- Comment #17 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #16)
> I would guess so. I wonder if the combiner could restrict itself
> here? Maybe LUID "distances" are an approximation? Doesn't the
> combiner use DF uses so the number of combinations shouldn't increase
> with basic-block size but only with the number of uses? Of course
> since we don't have SSA the uses probably include those that cross
> other defs...
Combine doesn't try too many pairs: it tries every def only with its
first use, so that is linear in # insns. But the check if a combination
is valid uses reg_used_between_p, which is no good for insns a big
distance apart.
> That said, algorithmically first building up a kind-of-SSA to
> restrict things combine will try might help to avoid this kind
> of issues.
Yup. Not going to happen in stage4, of course :-/
There are a few other things which aren't linear, but this is the
worst one (the rest only happens occasionally, or only on successful
combinations).
> Since combine does a df_analyze we should have a way to record
> the number of insns in a block without another IL walk, it could
> also fall back to 2->1 and 2->2 insn combinations after visiting
> a new PARAM max-combine-bb-insns-3-3 number of insns in an EBB.
The 3->1 (or 3->2) isn't really the problem; there just are many more
to try than 2->[12].
> Actually it already does two walks over the whole function in
> combine_instructions it seems, so recording # insns per EBB should
> be possible? (if that's really the key metric causing the issue)
The average distance between a set and its first use is the key metric.
The numbers make it feel like that is pretty constrained here still
(I haven't run numbers on it), but 100 is very much already if there are
1M insns in the block (or whatever). All numbers that aren't terrible,
but combines it takes up quite a chunk of time.
Combine also makes garbage for every try, and none of that is cleaned
up during combine. Maybe we should change that? (I can try next week).
>From gcc-bugs-return-639584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 02:02:41 2019
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzg5Mzc1XSBmb3J0cmFuL2V4cHIuYzo0NzIzOjU6IHdh?= =?UTF-8?B?cm5pbmc6IGxvZ2ljYWwg4oCYb3LigJkgb2YgZXF1YWwgZXhwcmVzc2lvbnMg?= =?UTF-8?B?Wy1XbG9naWNhbC1vcF0=?Date: Thu, 04 Apr 2019 02:02:00 -0000
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--- Comment #5 from Fritz Reese <fritzoreese at gmail dot com> ---
Thanks Dominiq.
On Wed, Apr 3, 2019, 05:02 dominiq at lps dot ens.fr <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89375
>
> Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
>
> What |Removed |Added
>
> ----------------------------------------------------------------------------
> Status|NEW |RESOLVED
> Resolution|--- |FIXED
>
> --- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Fixed.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
>From gcc-bugs-return-639585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 02:05:06 2019
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From: "kallisti5 at unixzen dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/89955] New: riscv.h improperly defines STARTFILE_PREFIX_SPEC spec
Date: Thu, 04 Apr 2019 02:05:00 -0000
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Bug ID: 89955
Summary: riscv.h improperly defines STARTFILE_PREFIX_SPEC spec
Product: gcc
Version: unknown
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https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/riscv/riscv.h?view=markup#l885
gcc/config/riscv.h defines STARTFILE_PREFIX_SPEC which breaks sysroot's.
Under a new platform (Haiku), our bootstrap was failing missing core existing
cross-compiled system libraries which were present and accounted for.
Eventually I figured out to #undef STARTFILE_PREFIX_SPEC in our
gcc/config/riscv/haiku.h header and things magically began working. Since
we're cross compiling with a sysroot (which is *not*) at /usr/lib,/lib,etc, it
breaks the sysroot functionality.
Likely I think STARTFILE_PREFIX_SPEC needs moved to config/riscv/linux.h ?
>From gcc-bugs-return-639586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 02:21:49 2019
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Subject: [Bug middle-end/89911] [9 Regression] ICE in get_attr_nonstring_decl, at calls.c:1502
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Subject: [Bug c++/86986] [7/8/9 Regression] Unexpected errors for template parameter pack in a template template parameter
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Subject: [Bug tree-optimization/89956] New: [9 Regression] ICE: Segmentation fault (in gsi_for_stmt(gimple*))
Date: Thu, 04 Apr 2019 03:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89956
Bug ID: 89956
Summary: [9 Regression] ICE: Segmentation fault (in
gsi_for_stmt(gimple*))
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
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gfortran-9.0.0-alpha20190331 (r270048) ICEs when compiling the following
testcase w/ -O2 (-O3, -Ofast) -fno-code-hoisting -fno-signed-zeros
-fno-trapping-math -fno-tree-dominator-opts -fno-tree-forwprop -fno-tree-pre:
module de
contains
function zu (az, xx) result (q3)
real :: az, xx, q3
q3 = 1.0 - lz (az, xx) - lz (xx, az)
end function zu
function lz (ho, gh) result (ye)
real :: ho, gh, ye
ye = sqrt (ho) - ho * gh
end function lz
end module de
% powerpc-e300c3-linux-gnu-gfortran-9.0.0-alpha20190331 -O2 -fno-code-hoisting
-fno-signed-zeros -fno-trapping-math -fno-tree-dominator-opts
-fno-tree-forwprop -fno-tree-pre -c xonlkfwo.f90
during GIMPLE pass: widening_mul
xonlkfwo.f90:3:0:
3 | function zu (az, xx) result (q3)
|
internal compiler error: Segmentation fault
0xd83ce6 crash_signal
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190331/work/gcc-9-20190331/gcc/toplev.c:326
0xacbfab gsi_for_stmt(gimple*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190331/work/gcc-9-20190331/gcc/gimple-iterator.c:611
0xefe0b6 convert_mult_to_fma_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190331/work/gcc-9-20190331/gcc/tree-ssa-math-opts.c:2882
0xf03e07 convert_mult_to_fma
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190331/work/gcc-9-20190331/gcc/tree-ssa-math-opts.c:3278
0xf048cb after_dom_children
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190331/work/gcc-9-20190331/gcc/tree-ssa-math-opts.c:3755
0x1463647 dom_walker::walk(basic_block_def*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190331/work/gcc-9-20190331/gcc/domwalk.c:395
0xf03891 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190331/work/gcc-9-20190331/gcc/tree-ssa-math-opts.c:3838
==20688== Invalid read of size 8
==20688== at 0xACBFAB: gsi_for_stmt(gimple*) (gimple-iterator.c:611)
==20688== by 0xEFE0B6: convert_mult_to_fma_1(tree_node*, tree_node*,
tree_node*) (tree-ssa-math-opts.c:2882)
==20688== by 0xF03E07: convert_mult_to_fma(gimple*, tree_node*, tree_node*,
fma_deferring_state*) (tree-ssa-math-opts.c:3278)
==20688== by 0xF048CB: (anonymous
namespace)::math_opts_dom_walker::after_dom_children(basic_block_def*)
(tree-ssa-math-opts.c:3755)
==20688== by 0x1463647: dom_walker::walk(basic_block_def*) (domwalk.c:395)
==20688== by 0xF03891: (anonymous
namespace)::pass_optimize_widening_mul::execute(function*)
(tree-ssa-math-opts.c:3838)
==20688== by 0xCABD3C: execute_one_pass(opt_pass*) (passes.c:2487)
==20688== by 0xCAC497: execute_pass_list_1(opt_pass*) (passes.c:2573)
==20688== by 0xCAC4A9: execute_pass_list_1(opt_pass*) (passes.c:2574)
==20688== by 0xCAC4F0: execute_pass_list(function*, opt_pass*)
(passes.c:2584)
==20688== by 0x96EC8E: cgraph_node::expand() (cgraphunit.c:2198)
==20688== by 0x97011D: expand_all_functions (cgraphunit.c:2336)
==20688== by 0x97011D: compile (cgraphunit.c:2687)
==20688== by 0x97011D: symbol_table::compile() (cgraphunit.c:2597)
==20688== Address 0x10 is not stack'd, malloc'd or (recently) free'd
(While my target here is powerpc, the ICE is not target-specific. One have to
add -mfma in order to reproduce it for x86_64.)
>From gcc-bugs-return-639589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 03:01:52 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 03:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
--- Comment #21 from Erik Schnetter <schnetter at gmail dot com> ---
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00162.html
>From gcc-bugs-return-639590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 03:02:12 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/89957] New: ICE calling strnlen with an int128_t bound in a known range
Date: Thu, 04 Apr 2019 03:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89957
Bug ID: 89957
Summary: ICE calling strnlen with an int128_t bound in a known
range
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
$ cat z.c && gcc -c -O2 -Wall z.c
typedef __SIZE_TYPE__ size_t;
extern size_t strnlen ();
size_t foo (__int128_t n)
{
if (n < 0)
n = 0;
return strnlen ("", n);
}
z.c: In function ‘foo’:
z.c:9:23: warning: ‘strnlen’ argument 2 type is ‘__int128’ where ‘long unsigned
int’ is expected in a call to built-in function declared without prototype
[-Wbuiltin-declaration-mismatch]
9 | return strnlen ("", n);
| ^
z.c:3:15: note: built-in ‘strnlen’ declared here
3 | extern size_t strnlen ();
| ^~~~~~~
during RTL pass: expand
z.c:9:10: internal compiler error: in decompose, at wide-int.h:963
9 | return strnlen ("", n);
| ^~~~~~~~~~~~~~~
0x877bc0 wi::int_traits<generic_wide_int<wide_int_storage> >::decompose(long*,
unsigned int, generic_wide_int<wide_int_storage> const&)
/src/gcc/svn/gcc/wide-int.h:963
0x95f62a wide_int_ref_storage<true,
false>::wide_int_ref_storage<generic_wide_int<wide_int_storage>
>(generic_wide_int<wide_int_storage> const&, unsigned int)
/src/gcc/svn/gcc/wide-int.h:1013
0x95f5f6 generic_wide_int<wide_int_ref_storage<true, false>
>::generic_wide_int<generic_wide_int<wide_int_storage>
>(generic_wide_int<wide_int_storage> const&, unsigned int)
/src/gcc/svn/gcc/wide-int.h:788
0x9e15df bool wi::ltu_p<generic_wide_int<wide_int_ref_storage<false, false> >,
generic_wide_int<wide_int_storage>
>(generic_wide_int<wide_int_ref_storage<false, false> > const&,
generic_wide_int<wide_int_storage> const&)
/src/gcc/svn/gcc/wide-int.h:1913
0x9c2fea expand_builtin_strnlen
/src/gcc/svn/gcc/builtins.c:3154
0x9d22c9 expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
/src/gcc/svn/gcc/builtins.c:7533
0xbfc03c expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/src/gcc/svn/gcc/expr.c:11029
0xbee2c3 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
/src/gcc/svn/gcc/expr.c:8274
0xbe310a store_expr(tree_node*, rtx_def*, int, bool, bool)
/src/gcc/svn/gcc/expr.c:5673
0xbe143a expand_assignment(tree_node*, tree_node*, bool)
/src/gcc/svn/gcc/expr.c:5436
0xa1ece5 expand_call_stmt
/src/gcc/svn/gcc/cfgexpand.c:2722
0xa226b3 expand_gimple_stmt_1
/src/gcc/svn/gcc/cfgexpand.c:3691
0xa22d6e expand_gimple_stmt
/src/gcc/svn/gcc/cfgexpand.c:3850
0xa22e86 expand_gimple_tailcall
/src/gcc/svn/gcc/cfgexpand.c:3897
0xa2b406 expand_gimple_basic_block
/src/gcc/svn/gcc/cfgexpand.c:5863
0xa2d224 execute
/src/gcc/svn/gcc/cfgexpand.c:6509
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-639591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 03:04:59 2019
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Subject: [Bug middle-end/89957] ICE calling strnlen with an int128_t bound in a known range
Date: Thu, 04 Apr 2019 03:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=89911
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The crashing code (the wi::ltu_p call):
if (!TREE_NO_WARNING (exp)
&& wi::ltu_p (wi::to_wide (maxobjsize), min)
&& warning_at (loc, OPT_Wstringop_overflow_,
"%K%qD specified bound [%wu, %wu] "
"exceeds maximum object size %E",
exp, func, min.to_uhwi (), max.to_uhwi (), maxobjsize))
TREE_NO_WARNING (exp) = true;
The test case was reduced from pr89911.
>From gcc-bugs-return-639592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 03:05:49 2019
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Subject: [Bug middle-end/89957] ICE calling strnlen with an int128_t bound in a known range
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-04
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-639593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 06:42:55 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Thu, 04 Apr 2019 06:42:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-04
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Yes, we'll need the pre-processed source file (created with -E option). Please
attach it.
>From gcc-bugs-return-639594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 06:43:47 2019
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Subject: [Bug tree-optimization/89956] [9 Regression] ICE: Segmentation fault (in gsi_for_stmt(gimple*))
Date: Thu, 04 Apr 2019 06:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89956
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-04
CC| |marxin at gcc dot gnu.org,
| |rsandifo at gcc dot gnu.org
Known to work| |8.3.0
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r260348.
>From gcc-bugs-return-639595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 06:43:58 2019
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Subject: [Bug tree-optimization/89956] [9 Regression] ICE: Segmentation fault (in gsi_for_stmt(gimple*))
Date: Thu, 04 Apr 2019 06:43:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-639596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 06:46:00 2019
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From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89958] New: ICE and duplicate diagnostic with invalid return value
Date: Thu, 04 Apr 2019 06:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89958
Bug ID: 89958
Summary: ICE and duplicate diagnostic with invalid return value
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic, error-recovery, ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
Target Milestone: ---
The following invalid code snippet triggers an ICE since GCC 6.1.0,
killing the diagnostic in mid-sentence. In addition, the first part
of the diagnostic is emitted twice:
=============================
struct A;
constexpr auto foo(A* p)
{
return *p;
}
=============================
bug.cc: In function 'constexpr auto foo(A*)':
bug.cc:5:11: error: invalid use of incomplete type 'struct A'
5 | return *p;
| ^
bug.cc:1:8: note: forward declaration of 'struct A'
1 | struct A;
| ^
bug.cc:5:10: error: invalid use of incomplete type 'struct A'
5 | return *p;
| ^~
bug.cc:1:8: note: forward declaration of 'struct A'
1 | struct A;
| ^
bug.cc:3:16: error: invalid return type 'A' of 'constexpr' function 'constexpr
auto foo(A*)'
3 | constexpr auto foo(A* p)
| ^~~
bug.cc:1:8: note: 'A' is not literal because:
1 | struct A;
| ^
bug.cc:6:1: internal compiler error: Segmentation fault
6 | }
| ^
0xf8203f crash_signal
../../gcc/gcc/toplev.c:326
0x8d0333 tree_check(tree_node*, char const*, int, char const*, tree_code)
../../gcc/gcc/tree.h:3175
0x8d0333 explain_non_literal_class(tree_node*)
../../gcc/gcc/cp/class.c:5525
0x8d91f0 is_valid_constexpr_fn(tree_node*, bool)
../../gcc/gcc/cp/constexpr.c:239
0x8e8c82 register_constexpr_fundef(tree_node*, tree_node*)
../../gcc/gcc/cp/constexpr.c:871
0x92e967 maybe_save_function_definition
../../gcc/gcc/cp/decl.c:15949
0x92e967 finish_function(bool)
../../gcc/gcc/cp/decl.c:16096
0x9cd454 cp_parser_function_definition_after_declarator
../../gcc/gcc/cp/parser.c:27803
0x9ce199 cp_parser_function_definition_from_specifiers_and_declarator
../../gcc/gcc/cp/parser.c:27716
0x9ce199 cp_parser_init_declarator
../../gcc/gcc/cp/parser.c:20295
0x9b049e cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13539
0x9d41c0 cp_parser_declaration
../../gcc/gcc/cp/parser.c:13236
0x9d493c cp_parser_translation_unit
../../gcc/gcc/cp/parser.c:4698
0x9d493c c_parse_file()
../../gcc/gcc/cp/parser.c:41180
0xadae9b c_common_parse_file()
../../gcc/gcc/c-family/c-opts.c:1156
Please submit a full bug report, [etc.]
>From gcc-bugs-return-639597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 06:54:14 2019
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Subject: [Bug target/89951] Uncorrect instructions flag for Nehalem / westmere arch
Date: Thu, 04 Apr 2019 06:54:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-04
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Lemme take a look.
>From gcc-bugs-return-639598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 06:55:34 2019
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From: "P at draigBrady dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/85400] invalid Local Dynamic TLS relaxation for symbol defined in method
Date: Thu, 04 Apr 2019 06:55:00 -0000
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Pádraig Brady <P at draigBrady dot com> changed:
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----------------------------------------------------------------------------
CC| |P at draigBrady dot com
--- Comment #9 from Pádraig Brady <P at draigBrady dot com> ---
Note this isn't sparc specific.
I've also seen this when compiling CGAL 4.11 where gcc produced
R_X86_64_DTPOFF32 relocations for thread_local vars which lld wasn't happy with
at least.
Applying this patch to 8.3.0 (on x86_64) fixed the issue.
Seems this should be considered for 8.x branch.
thanks
>From gcc-bugs-return-639600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:04:38 2019
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Subject: [Bug target/89954] missed optimization for signed extension for x86-64
Date: Thu, 04 Apr 2019 07:04:00 -0000
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--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
Doesn't aarch64 always implicitly zero-extend when the dest is a 32-bit reg?
>From gcc-bugs-return-639599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:04:17 2019
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Subject: [Bug target/89951] Uncorrect instructions flag for Nehalem / westmere arch
Date: Thu, 04 Apr 2019 07:04:00 -0000
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
These two flags are irrelevant without -mavx.
>From gcc-bugs-return-639601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:10:52 2019
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Subject: [Bug target/89955] riscv.h improperly defines STARTFILE_PREFIX_SPEC spec
Date: Thu, 04 Apr 2019 07:10:00 -0000
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
In which way is STARTFILE_PREFIX_SPEC interfering with sysroot? The sysroot is
expected to use the standard layout, and the directories in
STARTFILE_PREFIX_SPEC are prefixed with the sysroot before being used.
>From gcc-bugs-return-639602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:19:23 2019
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Subject: [Bug c++/89958] ICE and duplicate diagnostic with invalid return value
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
The ICE is old with -std=c++14.
>From gcc-bugs-return-639603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:36:16 2019
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Subject: [Bug tree-optimization/46590] long compile time with -O2 and many loops
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--- Comment #54 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Apr 4 07:35:34 2019
New Revision: 270142
URL: https://gcc.gnu.org/viewcvs?rev=270142&root=gcc&view=rev
Log:
DF usage in loop-invariant.c (PR46590)
- df_live is already present at -O2, so we only need to add it and
mark all blocks dirty for -O
- df_process_deferred_rescans should be enough to force a rescan of
blocks affected by moving invariants, but calling it in find_defs
means that we don't do any rescans for the final loop
2019-04-04 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR rtl-optimization/46590
* loop-invariant.c (find_defs): Move df_remove_problem and
df_process_deferred_rescans to move_invariants.
Move df_live_add_problem and df_live_set_all_dirty calls
to move_invariants.
(move_invariants): Likewise.
(move_loop_invariants): Likewise, making the df_live calls
conditional on -O. Remove the problem again if we added it
locally.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/loop-invariant.c
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Subject: [Bug tree-optimization/89956] [9 Regression] ICE: Segmentation fault (in gsi_for_stmt(gimple*))
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Looking...
>From gcc-bugs-return-639606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:47:47 2019
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Subject: [Bug c++/89937] For example code, which is valid as either C or C++, optimization seems much better for C
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Walt Karas from comment #2)
> Hmmm it seems you are saying that inline (or weak linkage by any other name)
> in C++ somehow prohibits inlining.
I think in this instance, the inlining heuristics have decided not to inline
it, because it's an extern function. Possibly to prevent increasing the binary
size too much, but that's just a guess.
If it has internal linkage then the compiler knows there are no other callers,
just the one in this translation unit, so inlining it reduces code size and
avoids the function call overhead, win-win.
> I thought that, in C++, a weak linkage
> function may or may not be inlined. If it isn't, its object code must be in
> a vague linkage section.
Right.
> But there is no requirement for its object code to
> appear in a vague linkage section, is there?
Right. Any other translation unit that uses the inline function must also be
able to see the definition, and so another vague linkage definition will be
generated in any object that needs it.
>From gcc-bugs-return-639605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:47:30 2019
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Subject: [Bug gcov-profile/89959] New: gcov: "--long-file-names" is ignored when used in combination with "--hash-filenames"
Date: Thu, 04 Apr 2019 07:47:00 -0000
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Bug ID: 89959
Summary: gcov: "--long-file-names" is ignored when used in
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Fedora 29, gcc-8.3.1-2.fc29.x86_64 (no related patch AFAICT ->
https://src.fedoraproject.org/rpms/gcc/tree/a050417cd5cb9b3269bcce2e324fab8d081e4355)
a) Running "gcov -r -s <source_dir> -o <object directory> <.gcda file>" I get
files like
<source file>.gcov
b) Running "gcov -p -r -s <source_dir> -o <object directory> <.gcda file>" I
get files like
<relative path to the source file>.gcov
c) Running "gcov -x -r -s <source_dir> -o <object directory> <.gcda file>" I
get files like
<source file>##<hash>.gcov
d) Running "gcov -p -l -r -s <source_dir> -o <object directory> <.gcda file>" I
get files like
<full path to the .gcda file>##<relative path to the source file>.gcov
e) Running "gcov -x -l -r -s <source_dir> -o <object directory> <.gcda file>" I
get files like
<source file>##<hash>.gcov
Notice that 'c' and 'e' are identical, "-l" in 'e' has had no effect. I would
have expected 'e' to be
<full path to the .gcda file>##<source file>##<hash>.gcov
Also, notice that the documentation for --hash-filenames starts by saying: "By
default, gcov uses the full pathname of the source files to create an output
filename." That's incorrect, by default it uses only the filename.
The documentation would be more clear if it would describe "--hash-filenames"
as an alternative to "--preserve-paths". Interestingly, when "-x" is being used
"-l" is ignored... but "-p" isn't. So it's possible to use "-p" and "-x"
simultaneously, which makes no sense. You are using "-x" to avoid long
filenames, but by using it together with "-p" you are just making the filename
*longer*.
FWIW the reason I'm using "-l" is not because I "want to see the individual
contributions". My problem is that I'm using CDash (www.cdash.org), which runs
gcov once per .gcda instead of running it a single time taking all the .gcda
files as input (they should fix this
https://gitlab.kitware.com/cmake/cmake/issues/19124#note_554321, but there may
be others).
By running gcov once per .gcda file the .gcov file for a header created by one
invocation can get overwritten by the next .gcov invocation. Using "-l" works
around this issue.
Again, the problem is that CDash is using gcov incorrectly and they should fix
the issue. But since I suspect they are not the only ones... maybe it makes
sense to have another option to use the hash of the .gcda file? Meaning,
running "gcov -x --hash-long-file-names -r -s <source_dir> -o <object
directory> <.gcda file>" I would get files like
<gcda_path_hash>##<source file>##<source_file_path_hash>.gcov
Which would let me, using short file names, call gcov once per .gcda file
without the risk of overwriting .gcov files.
>From gcc-bugs-return-639607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:51:02 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Thu, 04 Apr 2019 07:51:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, let me first focus on the functional part of the patch.
If I'm correct feature_list in get_builtin_code_for_version function should be
basically aligned with isa_names_table in fold_builtin_cpu. Difference is
following:
+"avx5124fmaps"
+"avx5124vnniw"
+"avx512bitalg"
+"avx512bw"
+"avx512cd"
+"avx512dq"
+"avx512er"
+"avx512ifma"
+"avx512pf"
+"avx512vbmi"
+"avx512vbmi2"
+"avx512vl"
+"avx512vnni"
+"avx512vpopcntdq"
+"cmov"
+"gfni"
+"vpclmulqdq"
Adding that should be possible, but one needs to define a priorities of these
as seen here:
```
/* Priority of i386 features, greater value is higher priority. This is
used to decide the order in which function dispatch must happen. For
instance, a version specialized for SSE4.2 should be checked for dispatch
before a version for SSE3, as SSE4.2 implies SSE3. */
enum feature_priority
```
H.J. can you please help me with the priorities?
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--- Comment #1 from Cristian Morales Vega <christian.morales.vega at gmail dot com> ---
At the end of my previous comment
<gcda_path_hash>##<source file>##<source_file_path_hash>.gcov
should actually be
<gcda file>##<gcda_path_hash>##<source file>##<source_file_path_hash>.gcov
>From gcc-bugs-return-639609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:52:52 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to 康 çŠ from comment #10)
> Hi Martin Liška, I tried to build it with "-O3 -fno-strict-aliasing
> -falign-functions=32 -fno-math-errno -fno-semantic-interposition
> -fno-trapping-math", but it still had the issue. Can "-fno-strict-aliasing"
> work normally with "-O3"?
Yes, it should normally work. So the build is done w/o LTO, right?
>From gcc-bugs-return-639611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:53:41 2019
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Subject: [Bug c++/89937] For example code, which is valid as either C or C++, optimization seems much better for C
Date: Thu, 04 Apr 2019 07:53:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
But more generally, Andrew's point is that you're comparing apples and oranges.
If you declare the function "extern inline" then it has similar semantics in
both C and C++, and you get similar code (with an extern definition generated).
If you declare it "static inline" then it has similar semantics in both C and
C++, and you get similar code (with no extern definition generated).
If you just declare it "inline" then that means different things in C and C++,
and the compiler treats it differently. That's not a bug, it's because the code
means something different in C and C++.
>From gcc-bugs-return-639610-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:53:27 2019
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Subject: [Bug target/89951] Uncorrect instructions flag for Nehalem / westmere arch
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Then closing as invalid.
>From gcc-bugs-return-639612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:55:07 2019
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Subject: [Bug target/89951] Uncorrect instructions flag for Nehalem / westmere arch
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--- Comment #4 from Alexander <bratsinot at gmail dot com> ---
(In reply to Uroš Bizjak from comment #2)
> These two flags are irrelevant without -mavx.
But, for example, when i build Qt5 gcc give error about these two instructions.
>From gcc-bugs-return-639613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 07:56:24 2019
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Subject: [Bug target/89951] Uncorrect instructions flag for Nehalem / westmere arch
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Alexander from comment #4)
> (In reply to Uroš Bizjak from comment #2)
> > These two flags are irrelevant without -mavx.
>
> But, for example, when i build Qt5 gcc give error about these two
> instructions.
What kind of error? Can you please provide a test-case?
>From gcc-bugs-return-639614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 08:12:04 2019
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Subject: [Bug tree-optimization/89956] [9 Regression] ICE: Segmentation fault (in gsi_for_stmt(gimple*))
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--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Created attachment 46087
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46087&action=edit
Candidate patch
Testing the attached.
>From gcc-bugs-return-639615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 08:29:31 2019
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Subject: [Bug gcov-profile/89959] gcov: "--long-file-names" is ignored when used in combination with "--hash-filenames"
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Hi.
Thank you very much for using the GCOV.
>
> a) Running "gcov -r -s <source_dir> -o <object directory> <.gcda file>" I
> get files like
>
> <source file>.gcov
>
>
> b) Running "gcov -p -r -s <source_dir> -o <object directory> <.gcda file>" I
> get files like
>
> <relative path to the source file>.gcov
>
>
> c) Running "gcov -x -r -s <source_dir> -o <object directory> <.gcda file>" I
> get files like
>
> <source file>##<hash>.gcov
>
>
> d) Running "gcov -p -l -r -s <source_dir> -o <object directory> <.gcda
> file>" I get files like
>
> <full path to the .gcda file>##<relative path to the source file>.gcov
>
>
> e) Running "gcov -x -l -r -s <source_dir> -o <object directory> <.gcda
> file>" I get files like
>
> <source file>##<hash>.gcov
>
>
>
> Notice that 'c' and 'e' are identical, "-l" in 'e' has had no effect. I
> would have expected 'e' to be
>
> <full path to the .gcda file>##<source file>##<hash>.gcov
>
>
>
> Also, notice that the documentation for --hash-filenames starts by saying:
> "By default, gcov uses the full pathname of the source files to create an
> output filename." That's incorrect, by default it uses only the filename.
Correct, I'll fix that in documentation.
> The documentation would be more clear if it would describe
> "--hash-filenames" as an alternative to "--preserve-paths".
Exactly, the documentation describes problem of long file-names, but it should
make it clear that -l would be ignored.
Interestingly,
> when "-x" is being used "-l" is ignored... but "-p" isn't. So it's possible
> to use "-p" and "-x" simultaneously, which makes no sense. You are using
> "-x" to avoid long filenames, but by using it together with "-p" you are
> just making the filename *longer*.
You are right, -p should be also ignored in case of -x usage.
>
>
>
>
> FWIW the reason I'm using "-l" is not because I "want to see the individual
> contributions". My problem is that I'm using CDash (www.cdash.org), which
> runs gcov once per .gcda instead of running it a single time taking all the
> .gcda files as input (they should fix this
> https://gitlab.kitware.com/cmake/cmake/issues/19124#note_554321, but there
> may be others).
> By running gcov once per .gcda file the .gcov file for a header created by
> one invocation can get overwritten by the next .gcov invocation. Using "-l"
> works around this issue.
> Again, the problem is that CDash is using gcov incorrectly and they should
> fix the issue. But since I suspect they are not the only ones... maybe it
> makes sense to have another option to use the hash of the .gcda file?
> Meaning, running "gcov -x --hash-long-file-names -r -s <source_dir> -o
> <object directory> <.gcda file>" I would get files like
>
> <gcda_path_hash>##<source file>##<source_file_path_hash>.gcov
Please now, even now the complexity of option combination is quite huge :)
>
> Which would let me, using short file names, call gcov once per .gcda file
> without the risk of overwriting .gcov files.
Then I would recommend using -l option.
>From gcc-bugs-return-639616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 08:53:20 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Thu, 04 Apr 2019 08:53:00 -0000
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--- Comment #12 from 康 çŠ <kangshan0910 at hotmail dot com> ---
Yes, I built it with LDFLAGS="${LDFLAGS} -fno-lto". Moreover, I tried
"__attribute__((noipa)) uv_unref(uv_handle_t*);" and it could solve the issue.
So it may not be caused by the alias, right?
>From gcc-bugs-return-639617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 09:00:32 2019
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to 康 çŠ from comment #12)
> Yes, I built it with LDFLAGS="${LDFLAGS} -fno-lto". Moreover, I tried
> "__attribute__((noipa)) uv_unref(uv_handle_t*);" and it could solve the
> issue. So it may not be caused by the alias, right?
Hm, that's strange, because with -fno-lto, uv_unref can't be inlined as it's
defined in deps/uv/src/uv-common.c.
Ok, so please provide me again exact steps how you configure and build the
nodejs?
>From gcc-bugs-return-639618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 09:36:02 2019
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Subject: [Bug fortran/79861] i18n: add translator comment for "%s !$ACC LOOP loops not perfectly nested at %L"
Date: Thu, 04 Apr 2019 09:36:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Severity|normal |minor
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Could someone familiar with fortran/openmp.c have a look to this PR?
PING!-(
>From gcc-bugs-return-639619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 09:43:26 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 09:43:00 -0000
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--- Comment #22 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Erik Schnetter from comment #21)
> https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00162.html
Additional to the comments on list.
Perhaps this is just unfixable :(
I suspect that Apple will want to re-release the SDK, and the best real fix is
to use the SDK from the previous Xcode command line tools (you can still use
the latest tools from XC10.2 - just install the older version somewhere and
then use --with-sysroot= and/or --sysroot=)
(a) there's no guarantee that _Atomic u_long has the same size or alignment as
volatile u_long.
C11: 6.2.5 Types
...
27 ... The size, representation, and alignment of an atomic type need not be
the same as those of the corresponding unqualified type.
...
.. although it *probably* is for simple types for which there are direct atomic
ops.
(b) If we hack around it with "volatile" (assuming that the type happens to
have the same size and alignment), this will silently fail in any case it's
used.
(c) the <atomic> header is only available from C++11, AFAIR, and GCC is
supposed to be boot-strappable with C++98. Iff Apple were to elect to declare
that the OS *requires* C++11 to operate, then we should fix the configuration
for Darwin to ensure that this is enforced.
(d) In any case, is there any guarantee that the representation of the u_long
as a C++ atomic is the same size and align as its C11 counterpart? (I've not
checked this).
>From gcc-bugs-return-639620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 09:56:43 2019
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Subject: [Bug c++/89960] New: Implicit derived to base conversion considered type punning.
Date: Thu, 04 Apr 2019 09:56:00 -0000
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Bug ID: 89960
Summary: Implicit derived to base conversion considered type
punning.
Product: gcc
Version: 8.3.0
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Consider:
struct base {
int i;
void f(){}
};
template <void(base::*F)()>
struct derived : base {
void g1() {
return (this->*F)();
}
void g2() {
base* p = this;
return (p->*F)();
}
};
void h() {
derived<&base::f> x;
x.g1();
x.g2();
}
Compiling with -O2 -Wstrict-aliasing gives a warning
warning: dereferencing type-punned pointer will break strict-aliasing rules
[-Wstrict-aliasing]
return (this->*F)();
~~~~~~~~~~^~
It looks like the implicit conversion from derived to base is considered
type-punning.
Remarks: The warning goes away if either:
1) -O2 is not used.
2) -Wstrict-aliasing is not used.
3) base has no non-static data members.
4) F is not a template parameter.
5) x.g1()) is not called. (In contrast, x.g2() compiles fine and this is a
workaround for the issue.)
6) if another compiler is used (other vendor's but also gcc 4.6.4 or earlier)
>From gcc-bugs-return-639621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 10:06:43 2019
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Subject: [Bug c++/89960] Implicit derived to base conversion considered type punning.
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-04-04
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually I don't think it is warning about the conversion to base but rather it
is the conversion of the pointer to member functions that is being warned
about.
The way Pointer to member functions are implemented is a struct. But
void(base::)() and void(derived::)() are two different structs and are not
considered the same aliasing sets. This needs to be fixed.
Yes the warning is still wrong but it is just a slight difference on what the
issue really is.
>From gcc-bugs-return-639622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 10:09:31 2019
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Subject: [Bug c++/89937] For example code, which is valid as either C or C++, optimization seems much better for C
Date: Thu, 04 Apr 2019 10:09:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> (In reply to Walt Karas from comment #2)
> > Hmmm it seems you are saying that inline (or weak linkage by any other name)
> > in C++ somehow prohibits inlining.
>
> I think in this instance, the inlining heuristics have decided not to inline
> it, because it's an extern function. Possibly to prevent increasing the
> binary size too much, but that's just a guess.
Actually the inlining heuristics is not in play here at all. GCC does not know
how to inline variable argument functions where they are actually used :).
>From gcc-bugs-return-639623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 10:17:25 2019
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Subject: [Bug gcov-profile/89961] New: When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
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Bug ID: 89961
Summary: When "--intermediate-format" is used
"--preserve-paths"/"--hash-filenames" is ignored
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
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Fedora 29, gcc-8.3.1-2.fc29.x86_64 (no related patch AFAICT ->
https://src.fedoraproject.org/rpms/gcc/tree/a050417cd5cb9b3269bcce2e324fab8d081e4355)
In issue #89959 I described an issue I had because cmake runs gcov once per
.gcda file. Unfortunately I noticed that it would not be possible to run gcov
only once, with all the .gcda files, since the "--object-directory" is not the
same for all the .gcda files.
Fortunately gcov has the "--intermediate-format" option. Since "The output is a
single .gcov file per .gcda file" I don't have the gcov files overwriting
problems I had before, which required the use of "-l".
But the reason why "--preserve-paths"/"--hash-filenames" exist doesn't go away
because of the use of "--intermediate-format". Even when using
"--intermediate-format", "--preserve-paths"/"--hash-filenames" are "useful if
sourcefiles are in several different directories".
Unfortunately there seems to be a bug in gcov: when "--intermediate-format" is
used, "--preserve-paths"/"--hash-filenames" is ignored.
>From gcc-bugs-return-639624-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 10:19:58 2019
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Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-04
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
That would be easily fixable, thanks for report.
>From gcc-bugs-return-639625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 10:21:50 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #14 from 康 çŠ <kangshan0910 at hotmail dot com> ---
Yes, I built it with LDFLAGS="${LDFLAGS} -fno-lto". Moreover, I tried
"__attribute__((noipa)) uv_unref(uv_handle_t*);" and it could solve the issue.
So it may not be caused by the alias, right?
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to 康 çŠ from comment #14)
> Yes, I built it with LDFLAGS="${LDFLAGS} -fno-lto". Moreover, I tried
> "__attribute__((noipa)) uv_unref(uv_handle_t*);" and it could solve the
> issue. So it may not be caused by the alias, right?
You simply copied previous answer. I would like to see all commands use used.
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Subject: [Bug ipa/89924] [missed-optimization] Function not de-virtualized within the same TU
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at redhat dot com
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I will take into ipa-devirt why it mises final hint.
Jason, this however looks like C++ FE could do as well?
Honza
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #16 from 康 çŠ <kangshan0910 at hotmail dot com> ---
OK. Our latest release nodejs package build steps are:
export CFLAGS="$CFLAGS -O3 -falign-functions=32 -fno-math-errno
-fno-semantic-interposition -fno-trapping-math "
export CXXFLAGS="$CXXFLAGS -O3 -falign-functions=32 -fno-math-errno
-fno-semantic-interposition -fno-trapping-math "
export PYTHON=/usr/bin/python2
./configure --prefix=/usr --shared-openssl --shared-zlib --use-largepages
--enable-lto --shared-nghttp2
export LDFLAGS="${LDFLAGS} -fno-lto"
export CFLAGS="$CFLAGS -O3 -falign-functions=32 -fno-math-errno
-fno-semantic-interposition -fno-trapping-math "
export FCFLAGS="$CFLAGS -O3 -falign-functions=32 -fno-math-errno
-fno-semantic-interposition -fno-trapping-math "
export FFLAGS="$CFLAGS -O3 -falign-functions=32 -fno-math-errno
-fno-semantic-interposition -fno-trapping-math "
export CXXFLAGS="$CXXFLAGS -O3 -falign-functions=32 -fno-math-errno
-fno-semantic-interposition -fno-trapping-math "
make -j4
The node source code URL is
https://nodejs.org/dist/v10.15.3/node-v10.15.3.tar.xz.
The GCC used is 8.3.1 20190228 gcc-8-branch@269272.
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--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
> ./configure --prefix=/usr --shared-openssl --shared-zlib --use-largepages
> --enable-lto --shared-nghttp2
Why are you enabling LTO here if you don't want to use it?
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Subject: [Bug ipa/89924] [missed-optimization] Function not de-virtualized within the same TU
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
OK, C++ FE can't do that because virtual call is wrapper by foo_virtual_inner.
After inlining we see:
Determining dynamic type for call: OBJ_TYPE_REF(_5;(struct A)p_2(D)->0)
(p_2(D), p_2(D));
Starting walk at: _4 = MEM[(struct A *)p_2(D)]._vptr.A;
instance pointer: p_2(D) Outer instance pointer: p_2(D) offset: 0 (bits)
vtbl reference: MEM[(struct A *)p_2(D)]._vptr.A
No dynamic type change found.
Targets of polymorphic call of type 0:struct A token 0
Outer type (dynamic):struct A (or a derived type) offset 0 Speculative
outer type:struct Aint (or a derived type) at offset 0
This is partial list; extra targets may be defined in other units. (derived
types included) (speculative derived types included)
virtual A& Aint::operator+=(const A&)/3
foo_virtual (struct Aint * p)
{
int (*) () * _4;
int (*) () _5;
<bb 2> :
_4 = MEM[(struct A *)p_2(D)]._vptr.A;
_5 = *_4;
OBJ_TYPE_REF(_5;(struct A)p_2(D)->0) (p_2(D), p_2(D));
return;
}
The reason why we do not devirtualize is that only information about Aint is
the type of function parameter and we do not believe it implies the type of
memory location it points to because there is no read or anything from that
pointer before it is casted to struct A* and pointer of a given type does not
need to necessarily point to memory location of the same type unless you
dereference it.
Is it really valid to devirtualize here?
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--- Comment #4 from Jan Hubicka <hubicka at ucw dot cz> ---
And to answer the question about why GCC produces more code, it is
actually speculative devirtualization of the call. GCC determines
the most likely target and inlines it.
foo_virtual(Aint*):
# this tests whether the dynamic type uses
# Aint::operator+=
mov rax, QWORD PTR [rdi]
mov rax, QWORD PTR [rax]
cmp rax, OFFSET FLAT:Aint::operator+=(A const&)
jne .L19
# if so, this is inlined copy of operator +=
push rbx
xor ecx, ecx
mov edx, OFFSET FLAT:typeinfo for Aint
mov esi, OFFSET FLAT:typeinfo for A
mov rbx, rdi
call __dynamic_cast
test rax, rax
je .L20
mov eax, DWORD PTR [rax+8]
add DWORD PTR [rbx+8], eax
pop rbx
ret
# this is the fallback code in case devirtualizaiton
# failed.
.L19:
mov rsi, rdi
jmp rax
-fno-devirtualize-speculatively will lead to same code as Clang does.
Honza
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--- Comment #18 from 康 çŠ <kangshan0910 at hotmail dot com> ---
Sorry, actually I don't know the reason, and I failed to find any git comment
for that configuration. It is involved from 10.14.2 build.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89962
Bug ID: 89962
Summary: likely/unlikely attributes don't work on a
compound-statement
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
CC: jason at gcc dot gnu.org
Target Milestone: ---
int signum(int i)
{
if (i > 0) [[likely]]
return 1;
if (i < 0) [[likely]]
{
return -1;
}
return 0;
}
The first attribute works fine, the second doesn't:
f.cc: In function 'int signum(int)':
f.cc:5:14: warning: attributes at the beginning of statement are ignored
[-Wattributes]
5 | if (i < 0) [[likely]]
| ^~~~~~~~~~
The example from [dcl.attr.likelihood] similarly warns:
void g(int);
int f(int n) {
if (n > 5) [[unlikely]] { // n > 5 is considered to be arbitrarily unlikely
g(0);
return n * 2 + 1;
}
switch (n) {
case 1:
g(1);
[[fallthrough]];
[[likely]] case 2: // n == 2 is considered to be arbitrarily more
g(2); // likely than any other value of n
break;
}
return 3;
}
f.cc: In function 'int f(int)':
f.cc:3:14: warning: attributes at the beginning of statement are ignored
[-Wattributes]
3 | if (n > 5) [[unlikely]] { // n > 5 is considered to be arbitrarily
unlikely
| ^~~~~~~~~~~~
>From gcc-bugs-return-639634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 11:08:17 2019
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/89963] New: Compile-time hog when compiling gcc/testsuite/gcc.dg/autopar/uns-outer-6.c
Date: Thu, 04 Apr 2019 11:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89963
Bug ID: 89963
Summary: Compile-time hog when compiling
gcc/testsuite/gcc.dg/autopar/uns-outer-6.c
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: compile-time-hog
Severity: normal
Priority: P3
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Reporter: asolokha at gmx dot com
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At least gcc-9.0.0-alpha20190331 (r270048) and gcc 8.3 take indefinite time
when compiling gcc/testsuite/gcc.dg/autopar/uns-outer-6.c w/ -O1 (-O2, -O3,
-Ofast) -fexceptions -floop-nest-optimize -fnon-call-exceptions -ftree-pre.
The profile almost fully consists of calls into libgmp and libisl, like:
20.80% libgmp.so.10.3.2 [.] __gmpn_mul_1
13.27% libisl.so.19.1.0 [.] isl_tab_pivot
10.71% libgmp.so.10.3.2 [.] __gmpz_mul
8.60% libgmp.so.10.3.2 [.] __gmpz_divexact
4.21% libgmp.so.10.3.2 [.] __gmpn_gcd_1
3.63% libgmp.so.10.3.2 [.] __gmpz_aorsmul_1
3.08% libgmp.so.10.3.2 [.] __gmpz_gcd
2.52% libisl.so.19.1.0 [.] isl_seq_gcd
2.37% libgmp.so.10.3.2 [.] __gmpn_divexact_1
2.12% libgmp.so.10.3.2 [.] __gmpz_cmpabs
1.96% libgmp.so.10.3.2 [.] __gmpn_divexact
1.91% libgmp.so.10.3.2 [.] __gmpn_modexact_1_odd
1.84% libgmp.so.10.3.2 [.] __gmpn_submul_1
1.64% libisl.so.19.1.0 [.] isl_seq_abs_min_non_zero
1.60% libgmp.so.10.3.2 [.] __gmpz_cmp_ui
1.31% libisl.so.19.1.0 [.] isl_seq_scale_down
1.29% libgmp.so.10.3.2 [.] __gmpz_addmul
1.08% libisl.so.19.1.0 [.] isl_tab_row_is_redundant
1.03% libgmp.so.10.3.2 [.] __gmpn_copyi
0.98% libgmp.so.10.3.2 [.] __gmpn_addmul_1
0.80% libisl.so.19.1.0 [.] __gmpz_mul@plt
0.63% libisl.so.19.1.0 [.] __gmpz_addmul@plt
0.61% libisl.so.19.1.0 [.] __gmpz_divexact@plt
(trimmed)
So I'm not sure wheter it's a gcc, gmp or isl bug after all. I have gmp 6.1.2
and isl 0.20 installed. I also cannot reproduce this on godbolt.
>From gcc-bugs-return-639635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 11:28:43 2019
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Subject: [Bug target/89951] Uncorrect instructions flag for Nehalem / westmere arch
Date: Thu, 04 Apr 2019 11:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89951
--- Comment #6 from Alexander <bratsinot at gmail dot com> ---
(In reply to Martin Liška from comment #5)
> What kind of error? Can you please provide a test-case?
Like these:
> cd gui/ && ( test -e Makefile || /tmp/qt-everywhere-src-5.12.1/qtbase/bin/qmake -o Makefile /tmp/qt-everywhere-src-5.12.1/qtbase/src/gui/gui.pro ) && make -f Makefile
> make[3]: Entering directory '/tmp/qt-everywhere-src-5.12.1/qtbase/src/gui'
> g++ -c -pipe -Os -mtune=native -march=native -mno-avx256-split-unaligned-load -mno-avx256-split-unaligned-store -pipe -fPIC -O3 -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -D_REENTRANT -fPIC -DQT_NO_USING_NAMESPACE -DQT_NO_FOREACH -DENABLE_PIXMAN_DRAWHELPERS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_BUILD_GUI_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_CORE_LIB -march=core-avx2 -I. -I../../include -I../../include/QtGui -I../../include/QtGui/5.12.1 -I../../include/QtGui/5.12.1/QtGui -I.tracegen -isystem /usr/include/libdrm -I../../include/QtCore/5.12.1 -I../../include/QtCore/5.12.1/QtCore -I../../include/QtCore -I.moc -isystem /usr/include/libpng16 -I../3rdparty/harfbuzz-ng/include -I../../mkspecs/linux-g++ painting/qdrawhelper_avx2.cpp -o .obj/qdrawhelper_avx2.o
> painting/qdrawhelper_avx2.cpp: In function ‘void BLEND_SOURCE_OVER_ARGB32_AVX2(quint32*, const quint32*, int)’:
> painting/qdrawhelper_avx2.cpp:143:43: warning: AVX vector return without AVX enabled changes the ABI [-Wpsabi]
> const __m256i half = _mm256_set1_epi16(0x80);
> ~~~~~~~~~~~~~~~~~^~~~~~
> In file included from /usr/lib64/gcc/x86_64-slackware-linux/8.3.0/include/immintrin.h:43,
> from ../../include/QtCore/5.12.1/QtCore/private/../../../../../src/corelib/tools/qsimd_p.h:191,
> from ../../include/QtCore/5.12.1/QtCore/private/qsimd_p.h:1,
> from painting/qdrawhelper_p.h:65,
> from painting/qdrawhelper_avx2.cpp:40:
> /usr/lib64/gcc/x86_64-slackware-linux/8.3.0/include/avx2intrin.h: In function ‘void BYTE_MUL_AVX2(__m256i&, const __m256i&, const __m256i&, const __m256i&)’:
> /usr/lib64/gcc/x86_64-slackware-linux/8.3.0/include/avx2intrin.h:574:1: error: inlining failed in call to always_inline ‘__m256i _mm256_or_si256(__m256i, __m256i)’: target specific option mismatch
> _mm256_or_si256 (__m256i __A, __m256i __B)
But now i see, than Qt5 add additional -march=core-avx2 in FLAGS, so yeah, it's
not gcc problem.
>From gcc-bugs-return-639636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 11:29:23 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug web/89964] New: Remove the "First, you must pick a product on which to enter a bug:" page
Date: Thu, 04 Apr 2019 11:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89964
Bug ID: 89964
Summary: Remove the "First, you must pick a product on which to
enter a bug:" page
Product: gcc
Version: unknown
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When clicking the https://gcc.gnu.org/bugzilla/enter_bug.cgi links to create a
new bug you get an interstitial page asking you to select the product, either
classpath or gcc.
This is a waste of time for the vast majority of bug reporters, because
classpath is no longer maintained, and almost nobody reports bugs for it. There
have only been five bug reports since Jan 2018, four from the same reporter,
and one which should have been filed under product=gcc (and was a dup of a bug
in a downstream gcc package anyway).
Could we please make the links for new bugs go to
https://gcc.gnu.org/bugzilla/enter_bug.cgi?product=gcc by default?
If necessary there could be a link somewhere else to
https://gcc.gnu.org/bugzilla/enter_bug.cgi?product=classpath but I doubt it's
useful.
It would also be good if the Search page had product=gcc selected by default,
since most people probably aren't searching classpath bugs.
>From gcc-bugs-return-639637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 11:38:06 2019
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Subject: [Bug target/89965] New: [9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
Date: Thu, 04 Apr 2019 11:38:00 -0000
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Bug ID: 89965
Summary: [9 Regression] wrong code with -O -mtune=nano-x2
-fcaller-saves -fexpensive-optimizations -fno-tree-dce
-fno-tree-ter
Product: gcc
Version: 9.0
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Host: x86_64-pc-linux-gnu
Target: i686-pc-linux-gnu
Created attachment 46088
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46088&action=edit
reduced testcase
Output:
$ i686-pc-linux-gnu-gcc -O -mtune=nano-x2 -fcaller-saves
-fexpensive-optimizations -fno-tree-dce -fno-tree-ter testcase.c
$ ./a.out
Aborted
$ i686-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-i686/bin/i686-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-270111-checking-yes-rtl-df-extra-i686/bin/../libexec/gcc/i686-pc-linux-gnu/9.0.1/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --with-sysroot=/usr/i686-pc-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=i686-pc-linux-gnu --with-ld=/usr/bin/i686-pc-linux-gnu-ld
--with-as=/usr/bin/i686-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-270111-checking-yes-rtl-df-extra-i686
Thread model: posix
gcc version 9.0.1 20190403 (experimental) (GCC)
It seems this value [esp]:
...
# testcase.c:16: c *= i;
movzx esi, BYTE PTR [esp] # _3,
mov eax, ebp # c, c
mov edx, esi # _3, _3
imul eax, edx # c, _3
mov ebp, eax # c, c
...
is used uninitialized
>From gcc-bugs-return-639638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 11:57:13 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #23 from Jürgen Reuter <juergen.reuter at desy dot de> ---
This patch still doesn't work for me:
libtool: compile: /usr/local/packages/gcc_9.0/_build/./gcc/xgcc -shared-libgcc
-B/usr/local/packages/gcc_9.0/_build/./gcc -nostdinc++
-L/usr/local/packages/gcc_9.0/_build/x86_64-apple-darwin18.5.0/libstdc++-v3/src
-L/usr/local/packages/gcc_9.0/_build/x86_64-apple-darwin18.5.0/libstdc++-v3/src/.libs
-L/usr/local/packages/gcc_9.0/_build/x86_64-apple-darwin18.5.0/libstdc++-v3/libsupc++/.libs
-B/usr/local/x86_64-apple-darwin18.5.0/bin/
-B/usr/local/x86_64-apple-darwin18.5.0/lib/ -isystem
/usr/local/x86_64-apple-darwin18.5.0/include -isystem
/usr/local/x86_64-apple-darwin18.5.0/sys-include -D_GNU_SOURCE -D_DEBUG
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-DHAVE_RPC_XDR_H=0 -DHAVE_TIRPC_RPC_XDR_H=0 -I.
-I../../../../libsanitizer/sanitizer_common -I.. -I
../../../../libsanitizer/include -isystem
../../../../libsanitizer/include/system -Wall -W -Wno-unused-parameter
-Wwrite-strings -pedantic -Wno-long-long -fPIC -fno-builtin -fno-exceptions
-fno-rtti -fomit-frame-pointer -funwind-tables -fvisibility=hidden
-Wno-variadic-macros -I../../libstdc++-v3/include
-I../../libstdc++-v3/include/x86_64-apple-darwin18.5.0
-I../../../../libsanitizer/../libstdc++-v3/libsupc++ -std=gnu++11 -g -O2 -MT
sanitizer_platform_limits_posix.lo -MD -MP -MF
.deps/sanitizer_platform_limits_posix.Tpo -c
../../../../libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
-fno-common -DPIC -o .libs/sanitizer_platform_limits_posix.o
In file included from /usr/include/sys/attr.h:42,
from /usr/include/sys/mount.h:76,
from
../../../../libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc:55:
/usr/include/sys/ucred.h:94:2: error: '_Atomic' does not name a type
94 | _Atomic u_long cr_ref; /* reference count */
| ^~~~~~~
make[4]: *** [sanitizer_platform_limits_posix.lo] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-target-libsanitizer] Error 2
make: *** [all] Error 2
>From gcc-bugs-return-639639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:02:34 2019
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From: "schnetter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 12:02:00 -0000
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--- Comment #24 from Erik Schnetter <schnetter at gmail dot com> ---
On Thu, Apr 4, 2019 at 5:43 AM iains at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
>
> --- Comment #22 from Iain Sandoe <iains at gcc dot gnu.org> ---
> (In reply to Erik Schnetter from comment #21)
> > https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00162.html
>
> Additional to the comments on list.
>
> Perhaps this is just unfixable :(
>
> I suspect that Apple will want to re-release the SDK, and the best real
> fix is
> to use the SDK from the previous Xcode command line tools (you can still
> use
> the latest tools from XC10.2 - just install the older version somewhere and
> then use --with-sysroot= and/or --sysroot=)
>
> (a) there's no guarantee that _Atomic u_long has the same size or
> alignment as
> volatile u_long.
>
> C11: 6.2.5 Types
> ...
> 27 ... The size, representation, and alignment of an atomic type need not
> be
> the same as those of the corresponding unqualified type.
> ...
>
> .. although it *probably* is for simple types for which there are direct
> atomic
> ops.
>
This is for Apple systems, where they presumably control the ABI, or are at
least aware of the ABI when writing header files.
(b) If we hack around it with "volatile" (assuming that the type happens to
> have the same size and alignment), this will silently fail in any case it's
> used.
>
_Atomic is used only in a single struct, which is marked "this structure
should not be used outside the kernel", and protected by a "#ifdef
__APPLE_API_UNSTABLE" (which unfortunately defaults to being defined). To
my knowledge, no part of GCC will use this structure.
(c) the <atomic> header is only available from C++11, AFAIR, and GCC is
> supposed to be boot-strappable with C++98. Iff Apple were to elect to
> declare
> that the OS *requires* C++11 to operate, then we should fix the
> configuration
> for Darwin to ensure that this is enforced.
>
The header file works for all versions of C and C++. It uses _Atomic for
C11, _Atomic for C++11 (the bug we're seeing), and volatile in all other
cases. There is no requirement for C++11.
(d) In any case, is there any guarantee that the representation of the
> u_long
> as a C++ atomic is the same size and align as its C11 counterpart? (I've
> not
> checked this).
>
This seems to be an ABI question, and I assume Apple checked this on their
ABIs (probably only Intel and ARM). I assume that this is generally the
case as C11 and C++11 atomics were designed at the same time, so the ABI
designers will want to ensure sure.
-erik
>From gcc-bugs-return-639640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:07:16 2019
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From: "schnetter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 12:07:00 -0000
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--- Comment #25 from Erik Schnetter <schnetter at gmail dot com> ---
> On Thu, Apr 4, 2019 at 5:43 AM iains at gcc dot gnu.org <
> gcc-bugzilla@gcc.gnu.org> wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
> >
> > --- Comment #22 from Iain Sandoe <iains at gcc dot gnu.org> ---
> > (In reply to Erik Schnetter from comment #21)
> > > https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00162.html
> >
> > Additional to the comments on list.
> >
> > Perhaps this is just unfixable :(
> >
> > I suspect that Apple will want to re-release the SDK, and the best real
> > fix is
> > to use the SDK from the previous Xcode command line tools (you can
still
> > use
> > the latest tools from XC10.2 - just install the older version somewhere
and
> > then use --with-sysroot= and/or --sysroot=)
> >
> > (a) there's no guarantee that _Atomic u_long has the same size or
> > alignment as
> > volatile u_long.
> >
> > C11: 6.2.5 Types
> > ...
> > 27 ... The size, representation, and alignment of an atomic type need
not
> > be
> > the same as those of the corresponding unqualified type.
> > ...
> >
> > .. although it *probably* is for simple types for which there are direct
> > atomic
> > ops.
> >
>
> This is for Apple systems, where they presumably control the ABI, or are
at
> least aware of the ABI when writing header files.
>
> (b) If we hack around it with "volatile" (assuming that the type happens
to
> > have the same size and alignment), this will silently fail in any case
it's
> > used.
> >
>
> _Atomic is used only in a single struct, which is marked "this structure
> should not be used outside the kernel", and protected by a "#ifdef
> __APPLE_API_UNSTABLE" (which unfortunately defaults to being defined). To
> my knowledge, no part of GCC will use this structure.
>
> (c) the <atomic> header is only available from C++11, AFAIR, and GCC is
> > supposed to be boot-strappable with C++98. Iff Apple were to elect to
> > declare
> > that the OS *requires* C++11 to operate, then we should fix the
> > configuration
> > for Darwin to ensure that this is enforced.
> >
>
> The header file works for all versions of C and C++. It uses _Atomic for
> C11, _Atomic for C++11 (the bug we're seeing), and volatile in all other
> cases. There is no requirement for C++11.
>
> (d) In any case, is there any guarantee that the representation of the
> > u_long
> > as a C++ atomic is the same size and align as its C11 counterpart? (I've
> > not
> > checked this).
> >
>
> This seems to be an ABI question, and I assume Apple checked this on their
> ABIs (probably only Intel and ARM). I assume that this is generally the
> case as C11 and C++11 atomics were designed at the same time, so the ABI
> designers will want to ensure sure.
>
> -erik
>From gcc-bugs-return-639641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:11:52 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 12:11:00 -0000
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--- Comment #26 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Erik Schnetter from comment #25)
> > On Thu, Apr 4, 2019 at 5:43 AM iains at gcc dot gnu.org <
> > gcc-bugzilla@gcc.gnu.org> wrote:
> > _Atomic is used only in a single struct, which is marked "this structure
> > should not be used outside the kernel", and protected by a "#ifdef
> > __APPLE_API_UNSTABLE" (which unfortunately defaults to being defined). To
> > my knowledge, no part of GCC will use this structure.
Perhaps this provides an easier fix route:
a) what causes __APPLE_API_UNSTABLE to be defined?
b) what uses __APPLE_API_UNSTABLE?
c) could we undef it locally to solve the issue?
- GCC is not currently claiming to be capable of building the kernel (I've not
tried building any kernel > darwin9 with GCC).
>From gcc-bugs-return-639642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:26:34 2019
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Subject: [Bug tree-optimization/89582] Suboptimal code generated for floating point struct in -O3 compare to -O2
Date: Thu, 04 Apr 2019 12:26:00 -0000
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--- Comment #6 from Yichao Yu <yyc1992 at gmail dot com> ---
For the vfloat test case, isn't the optimum code just
```
addps %xmm2, %xmm0
addps %xmm3, %xmm1
retq
```
It's not making full use of the vector but I assume not having to spill is a
win? This is what clang produces.
And for the LLVM early lowering of the calling convention, a less awkward way
is.
```
define { <2 x float>, <2 x float> } @f2({<2 x float>, <2 x float>}, {<2 x
float>, <2 x float>}) {
%v0 = extractvalue { <2 x float>, <2 x float> } %0, 0
%v1 = extractvalue { <2 x float>, <2 x float> } %0, 1
%v2 = extractvalue { <2 x float>, <2 x float> } %1, 0
%v3 = extractvalue { <2 x float>, <2 x float> } %1, 1
%v5 = fadd <2 x float> %v0, %v2
%v6 = fadd <2 x float> %v1, %v3
%v7 = insertvalue { <2 x float>, <2 x float> } undef, <2 x float> %v5, 0
%v8 = insertvalue { <2 x float>, <2 x float> } %v7, <2 x float> %v6, 1
ret { <2 x float>, <2 x float> } %v8
}
```
>From gcc-bugs-return-639643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:30:29 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #27 from Jürgen Reuter <juergen.reuter at desy dot de> ---
In order to proceed bootstrapping I had also to fix
libsanitize/sanitizer_common/sanitizer_platform_limits_posix.cc
and
libsanitize/asan/asan_mac.cc
by correspondingly wrapping include statements.
>From gcc-bugs-return-639644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:37:26 2019
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Subject: [Bug web/89964] Remove the "First, you must pick a product on which to enter a bug:" page
Date: Thu, 04 Apr 2019 12:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89964
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
> classpath is no longer maintained,
Correction: This is not true.
> and almost nobody reports bugs for it.
But this is true.
>From gcc-bugs-return-639646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:50:46 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 12:50:00 -0000
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--- Comment #28 from Erik Schnetter <schnetter at gmail dot com> ---
On Thu, Apr 4, 2019 at 8:11 AM iains at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
>
> --- Comment #26 from Iain Sandoe <iains at gcc dot gnu.org> ---
> (In reply to Erik Schnetter from comment #25)
> > > On Thu, Apr 4, 2019 at 5:43 AM iains at gcc dot gnu.org <
> > > gcc-bugzilla@gcc.gnu.org> wrote:
>
> > > _Atomic is used only in a single struct, which is marked "this
structure
> > > should not be used outside the kernel", and protected by a "#ifdef
> > > __APPLE_API_UNSTABLE" (which unfortunately defaults to being
defined). To
> > > my knowledge, no part of GCC will use this structure.
>
> Perhaps this provides an easier fix route:
> a) what causes __APPLE_API_UNSTABLE to be defined?
> b) what uses __APPLE_API_UNSTABLE?
> c) could we undef it locally to solve the issue?
Unfortunately this route does not work:
<sys/appleapiopts.h>:
#ifndef __APPLE_API_UNSTABLE
#define __APPLE_API_UNSTABLE
#endif /* __APPLE_API_UNSTABLE */
-erik
> - GCC is not currently claiming to be capable of building the kernel
(I've not
> tried building any kernel > darwin9 with GCC).
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
--
Erik Schnetter <schnetter@gmail.com>
http://www.perimeterinstitute.ca/personal/eschnetter/
>From gcc-bugs-return-639647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 12:57:58 2019
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Subject: [Bug target/89965] [9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can't reproduce that on x86_64-linux-gnu with -m32. I'm going to bisect that on
a i686 machine.
>From gcc-bugs-return-639648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 13:02:50 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #29 from Erik Schnetter <schnetter at gmail dot com> ---
On Thu, Apr 4, 2019 at 8:11 AM iains at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
>
> --- Comment #26 from Iain Sandoe <iains at gcc dot gnu.org> ---
> (In reply to Erik Schnetter from comment #25)
> > > On Thu, Apr 4, 2019 at 5:43 AM iains at gcc dot gnu.org <
> > > gcc-bugzilla@gcc.gnu.org> wrote:
>
> > > _Atomic is used only in a single struct, which is marked "this
structure
> > > should not be used outside the kernel", and protected by a "#ifdef
> > > __APPLE_API_UNSTABLE" (which unfortunately defaults to being
defined). To
> > > my knowledge, no part of GCC will use this structure.
>
> Perhaps this provides an easier fix route:
> a) what causes __APPLE_API_UNSTABLE to be defined?
> b) what uses __APPLE_API_UNSTABLE?
> c) could we undef it locally to solve the issue?
Unfortunately this route does not work:
<sys/appleapiopts.h>:
#ifndef __APPLE_API_UNSTABLE
#define __APPLE_API_UNSTABLE
#endif /* __APPLE_API_UNSTABLE */
-erik
> - GCC is not currently claiming to be capable of building the kernel
(I've not
> tried building any kernel > darwin9 with GCC).
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
--
Erik Schnetter <schnetter@gmail.com>
http://www.perimeterinstitute.ca/personal/eschnetter/
>From gcc-bugs-return-639649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 13:22:01 2019
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Subject: [Bug target/89965] [9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-04
Ever confirmed|0 |1
Known to fail| |8.2.1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I see the problem also with GCC 8.2.1. Are you sure Jan that it's a 9
regression?
>From gcc-bugs-return-639650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 13:27:21 2019
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Subject: [Bug target/89965] [9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #2)
> I see the problem also with GCC 8.2.1. Are you sure Jan that it's a 9
> regression?
Sorry, I meant Zdenek :)
>From gcc-bugs-return-639651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 13:35:48 2019
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Subject: [Bug target/89965] [9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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--- Comment #4 from Zdenek Sojka <zsojka at seznam dot cz> ---
(In reply to Martin Liška from comment #3)
> (In reply to Martin Liška from comment #2)
> > I see the problem also with GCC 8.2.1. Are you sure Jan that it's a 9
> > regression?
>
> Sorry, I meant Zdenek :)
I wasn't able to trigger it with i686-pc-linux-gnu-gcc 8.3.1 20190403
(r270109), but if you are able to trigger it with another revision, it's likely
just hidden and not a regression.
>From gcc-bugs-return-639652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 13:42:26 2019
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From: "pexu@gcc-bugzilla.mail.kapsi.fi" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89966] New: [9 Regression] non-type template argument rejects sizeof operator result
Date: Thu, 04 Apr 2019 13:42:00 -0000
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Bug ID: 89966
Summary: [9 Regression] non-type template argument rejects
sizeof operator result
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Reporter: pexu@gcc-bugzilla.mail.kapsi.fi
Target Milestone: ---
Build: 9.0.1 20190404
Hi.
This has appeared within the last four weeks or so. It seems that not all
operators are affected as e.g. alignof(...) works just fine in the same
context. Maybe this has something do with the sizeof(...) internals rather
than non-type template parameters / arguments?
$ cat ntta__sizeof.cpp
template < auto a0 >
void f0() { }
void f0_call() { f0< sizeof(int) >(); }
$ g++.exe -Wall -Wextra -std=c++17 -fconcepts -c ntta__sizeof.cpp
ntta__sizeof.cpp: In function 'void f0_call()':
ntta__sizeof.cpp:3:36: error: no matching function for call to 'f0<sizeof
(int)>()'
3 | void f0_call() { f0< sizeof(int) >(); }
| ^
ntta__sizeof.cpp:2:6: note: candidate: 'template<auto a0> void f0()'
2 | void f0() { }
| ^~
ntta__sizeof.cpp:2:6: note: template argument deduction/substitution failed:
ntta__sizeof.cpp: In substitution of 'template<auto a0> void f0() [with auto a0
= sizeof (int)]':
ntta__sizeof.cpp:3:36: required from here
ntta__sizeof.cpp:3:36: error: integral expression 'sizeof (int)' is not
constant
3 | void f0_call() { f0< sizeof(int) >(); }
| ^
ntta__sizeof.cpp:3:36: error: trying to instantiate 'template<auto a0> void
f0()'
>From gcc-bugs-return-639653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 13:50:57 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Thu, 04 Apr 2019 13:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89893
--- Comment #19 from 康 çŠ <kangshan0910 at hotmail dot com> ---
I tried the following experiments:
1)Tried "__attribute__((noinline)) uv_unref(uv_handle_t*)", it could solve the
issue.
2)Tried "__attribute__((noipa)) uv_unref(uv_handle_t*)", it could solve the
issue.
2)Tried "-O2", it could not solve the issue.
3)Tried "-O2 -fno-strict-aliasing", it could not solve the issue.
4)Tried "-O3 -fno-strict-aliasing", it could not solve the issue.
>From gcc-bugs-return-639654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 14:17:50 2019
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Subject: [Bug middle-end/89922] Loop on fixed size array is not unrolled and poorly optimized at -O2
Date: Thu, 04 Apr 2019 14:17:00 -0000
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--- Comment #2 from Antony Polukhin <antoshkka at gmail dot com> ---
The estimation is very close to the actual result for the loop.
But it does not take into the account the instructions before the loop that are
eliminated due to unrolling. Some heuristic like "initializing the local
variable with goes away for unrolled loops if the variable is rewritten in loop
or if the variable is not used outside the loop"
>From gcc-bugs-return-639655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 14:41:20 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Thu, 04 Apr 2019 14:41:00 -0000
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--- Comment #20 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to 康 çŠ from comment #19)
> I tried the following experiments:
> 1)Tried "__attribute__((noinline)) uv_unref(uv_handle_t*)", it could solve
> the issue.
> 2)Tried "__attribute__((noipa)) uv_unref(uv_handle_t*)", it could solve the
> issue.
> 2)Tried "-O2", it could not solve the issue.
> 3)Tried "-O2 -fno-strict-aliasing", it could not solve the issue.
> 4)Tried "-O3 -fno-strict-aliasing", it could not solve the issue.
Are you talking about LTO or non-LTO builds?
>From gcc-bugs-return-639656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 14:46:23 2019
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 14:46:00 -0000
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--- Comment #30 from Jürgen Reuter <juergen.reuter at desy dot de> ---
In addition to Erik's changes I have to do as well:
--- asan_mac.cc 2019-04-04 15:02:48.000000000 +0200
+++ asan_mac.cc.orig 2019-04-04 16:44:32.000000000 +0200
@@ -32,13 +32,7 @@
#include <stdlib.h> // for free()
#include <sys/mman.h>
#include <sys/resource.h>
-#if defined(__cplusplus) && __cplusplus >= 201103L
-# define _Atomic volatile
-#endif
#include <sys/sysctl.h>
-#if defined(__cplusplus) && __cplusplus >= 201103L
-# undef _Atomic
-#endif
#include <sys/ucontext.h>
#include <unistd.h>
--- sanitizer_platform_limits_posix.cc 2019-04-04 15:02:24.000000000 +0200
+++ sanitizer_platform_limits_posix.cc.orig 2019-04-04 16:45:00.000000000
+0200
@@ -52,14 +52,7 @@
#endif
#if !SANITIZER_ANDROID
-
-#if defined(__cplusplus) && __cplusplus >= 201103L
-# define _Atomic volatile
-#endif
#include <sys/mount.h>
-#if defined(__cplusplus) && __cplusplus >= 201103L
-# undef _Atomic
-#endif
#include <sys/timeb.h>
#include <utmpx.h>
#endif
@@ -77,13 +70,7 @@
#include <linux/input.h>
#include <linux/ioctl.h>
#include <linux/soundcard.h>
-#if defined(__cplusplus) && __cplusplus >= 201103L
-# define _Atomic volatile
-#endif
#include <linux/sysctl.h>
-#if defined(__cplusplus) && __cplusplus >= 201103L
-# undef _Atomic
-#endif
#include <linux/utsname.h>
#include <linux/posix_types.h>
#include <net/if_arp.h>
>From gcc-bugs-return-639657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 14:50:57 2019
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Subject: [Bug fortran/56293] Segfault when trying to access pass-by-reference value of a not-word-aligned REAL(16) / -fno-align-commons
Date: Thu, 04 Apr 2019 14:50:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Compiling the tests with -std=f2018 gives
4 | common/sss/ i, p
| 1
Warning: Fortran 2018 obsolescent feature: COMMON block at (1)
then I am in favor to close this PR as WONTFIX after more than five years
without any activity.
>From gcc-bugs-return-639658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 14:50:58 2019
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Subject: [Bug fortran/89078] [meta-bug] Improve the gfortran manual
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Bug 89078 depends on bug 56293, which changed state.
Bug 56293 Summary: Segfault when trying to access pass-by-reference value of a not-word-aligned REAL(16) / -fno-align-commons
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56293
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |WONTFIX
>From gcc-bugs-return-639659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 14:52:21 2019
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Subject: [Bug c++/86960] [8/9 Regression] internal compiler error: in coerce_template_parms
Date: Thu, 04 Apr 2019 14:52:00 -0000
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Assignee|aoliva at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
jason has a better starting point for this, but the changes would be too
invasive for GCC9. deferring
>From gcc-bugs-return-639660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 14:58:52 2019
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Subject: [Bug target/89965] [9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Zdenek Sojka from comment #4)
> (In reply to Martin Liška from comment #3)
> > (In reply to Martin Liška from comment #2)
> > > I see the problem also with GCC 8.2.1. Are you sure Jan that it's a 9
> > > regression?
> >
> > Sorry, I meant Zdenek :)
>
> I wasn't able to trigger it with i686-pc-linux-gnu-gcc 8.3.1 20190403
> (r270109), but if you are able to trigger it with another revision, it's
> likely just hidden and not a regression.
I'm able. But apparently GCC-7 branch point is ok. I'll bisect that.
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From: "schnetter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
--- Comment #31 from Erik Schnetter <schnetter at gmail dot com> ---
Here is an updated version of the patch that fixincludes both
<sys/sysctl.h> and <sys/ucred.h>, and does not need to touch any sources
files in GCC any more:
Index: fixincludes/inclhack.def
===================================================================
--- fixincludes/inclhack.def (revision 270127)
+++ fixincludes/inclhack.def (working copy)
@@ -1298,6 +1298,69 @@ fix = {
};
/*
+ * macOS 10.14.4 <sys/ucred.h> uses the C _Atomic keyword in C++
+ * code, and this file is included by <sys/sysctl.h>.
+ */
+fix = {
+ hackname = darwin_sysctl3__Atomic;
+ mach = "*-*-darwin18.5.*";
+ files = sys/sysctl.h;
+ select = "#include <sys/ucred.h>";
+
+ c_fix = wrap;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # define _Atomic volatile
+ #endif
+
+ _EOArg_;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # undef _Atomic
+ #endif
+
+ _EOArg_;
+
+ test_text = "#include <sys/sysctl.h>\n";
+};
+
+
+/*
+ * macOS 10.14.4 <sys/ucred.h> uses the C _Atomic keyword in C++
+ * code.
+ */
+fix = {
+ hackname = darwin_ucred__Atomic;
+ mach = "*-*-darwin18.5.*";
+ files = sys/ucred.h;
+ select = "_Atomic";
+
+ c_fix = wrap;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # define _Atomic volatile
+ #endif
+
+ _EOArg_;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # undef _Atomic
+ #endif
+
+ _EOArg_;
+
+ test_text = "#include <sys/ucred.h>\n";
+};
+
+/*
* For the AAB_darwin7_9_long_double_funcs fix to be useful,
* you have to not use "" includes.
*/
--
Erik Schnetter <schnetter@gmail.com>
http://www.perimeterinstitute.ca/personal/eschnetter/
>From gcc-bugs-return-639662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:03:05 2019
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Subject: [Bug fortran/47720] problems with makefile dependency generation using -M
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |eh.toussaint at gmail dot com
--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 84513 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-639663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:03:05 2019
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Subject: [Bug fortran/84513] gfortran -M generates circular dependency
Date: Thu, 04 Apr 2019 15:03:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr47720.
*** This bug has been marked as a duplicate of bug 47720 ***
>From gcc-bugs-return-639664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:06:34 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #32 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Erik Schnetter from comment #31)
> Here is an updated version of the patch that fixincludes both
> <sys/sysctl.h> and <sys/ucred.h>, and does not need to touch any sources
> files in GCC any more:
>
What about the changes in the libsanitizer? Are they still necessary?
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Subject: [Bug c/89967] New: Inefficient code generation for vld2q_lane_u8 under aarch64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89967
Bug ID: 89967
Summary: Inefficient code generation for vld2q_lane_u8 under
aarch64
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: carsten.steger at gmail dot com
Target Milestone: ---
Using vld2q_lane_u8 can generate very inefficient code under aarch64. Consider
the following code (compile it with gcc -march=armv8-a -Wall -Wextra -O3):
#include <arm_neon.h>
void func(unsigned char *in, int *out, int n, int32x4_t o1v, int32x4_t o2v,
int32x4_t s1v, int32x4_t s2v, int32x4_t m1v, int32x4_t m2v,
int32x4_t m3v, int32x4_t m4v)
{
int i;
int32x4_t l1v, l2v, g1v, g2v, g3v, g4v, gv;
uint8x16x2_t g1b, g2b;
l1v = o1v;
l2v = o2v;
g1b.val[0] = vdupq_n_u8(0);
g1b.val[1] = vdupq_n_u8(0);
g2b.val[0] = vdupq_n_u8(0);
g2b.val[1] = vdupq_n_u8(0);
for (i=0; i<n; i+=4)
{
g1b = vld2q_lane_u8(&in[vgetq_lane_s32(l1v, 0)], g1b, 0);
g1b = vld2q_lane_u8(&in[vgetq_lane_s32(l1v, 1)], g1b, 4);
g1b = vld2q_lane_u8(&in[vgetq_lane_s32(l1v, 2)], g1b, 8);
g1b = vld2q_lane_u8(&in[vgetq_lane_s32(l1v, 3)], g1b, 12);
g2b = vld2q_lane_u8(&in[vgetq_lane_s32(l2v, 0)], g2b, 0);
g2b = vld2q_lane_u8(&in[vgetq_lane_s32(l2v, 1)], g2b, 4);
g2b = vld2q_lane_u8(&in[vgetq_lane_s32(l2v, 2)], g2b, 8);
g2b = vld2q_lane_u8(&in[vgetq_lane_s32(l2v, 3)], g2b, 12);
g1v = vreinterpretq_s32_u8(g1b.val[0]);
g2v = vreinterpretq_s32_u8(g1b.val[1]);
g3v = vreinterpretq_s32_u8(g2b.val[0]);
g4v = vreinterpretq_s32_u8(g2b.val[1]);
gv = vmlaq_s32(vmlaq_s32(vmlaq_s32(vmulq_s32(m4v, g4v), m3v, g3v),
m2v, g2v), m1v, g1v);
vst1q_s32(&out[i], gv);
vaddq_s32(l1v, s1v);
vaddq_s32(l2v, s2v);
}
}
The calls to vld2q_lane_u8 generate the following assembler code:
mov v30.16b, v2.16b
mov v31.16b, v28.16b
mov v24.16b, v26.16b
mov v25.16b, v27.16b
ld2 {v30.b - v31.b}[0], [x7]
ld2 {v24.b - v25.b}[0], [x10]
mov v22.16b, v30.16b
mov v23.16b, v31.16b
mov v20.16b, v24.16b
mov v21.16b, v25.16b
ld2 {v22.b - v23.b}[4], [x6]
ld2 {v20.b - v21.b}[4], [x9]
mov v18.16b, v22.16b
mov v19.16b, v23.16b
mov v0.16b, v20.16b
mov v1.16b, v21.16b
ld2 {v18.b - v19.b}[8], [x5]
ld2 {v0.b - v1.b}[8], [x8]
mov v2.16b, v18.16b
mov v3.16b, v19.16b
mov v16.16b, v0.16b
mov v17.16b, v1.16b
ld2 {v2.b - v3.b}[12], [x0]
ld2 {v16.b - v17.b}[12], [x4]
There is a large amount of unnecessary register copying going on. Since the
compiler was smart enough to replace the vgetq_lane_s32 and vaddq_s32 calls
with direct register accesses and manipulations, I would have expected the
vld2q_lane_u8 calls to look like this (saving 16 unnecessary register copy
instructions:
ld2 {v0.b - v1.b}[0], [x7]
ld2 {v2.b - v3.b}[0], [x10]
ld2 {v0.b - v1.b}[4], [x6]
ld2 {v2.b - v3.b}[4], [x9]
ld2 {v0.b - v1.b}[8], [x5]
ld2 {v2.b - v2.b}[8], [x8]
ld2 {v0.b - v1.b}[12], [x0]
ld2 {v2.b - v3.b}[12], [x4]
In general (i.e., in cases the compiler isn't able to replace the
vgetq_lane_s32 and vaddq_s32 calls with direct register accesses and
manipulations), I would expect the code to look roughly like this (modulo the
instruction order and register numbers):
umov w0, v4.s[0]
umov w1, v4.s[1]
umov w2, v4.s[2]
umov w3, v4.s[3]
add x0, x5, w0, sxtw
add x1, x5, w1, sxtw
add x2, x5, w2, sxtw
add x3, x5, w3, sxtw
ld2 {v0.b, v1.b}[0], [x0]
ld2 {v0.b, v1.b}[4], [x1]
ld2 {v0.b, v1.b}[8], [x2]
ld2 {v0.b, v1.b}[12], [x3]
umov w0, v5.s[0]
umov w1, v5.s[1]
umov w2, v5.s[2]
umov w3, v5.s[3]
add x0, x5, w0, sxtw
add x1, x5, w1, sxtw
add x2, x5, w2, sxtw
add x3, x5, w3, sxtw
ld2 {v2.b, v3.b}[0], [x0]
ld2 {v2.b, v3.b}[4], [x1]
ld2 {v2.b, v3.b}[8], [x2]
ld2 {v2.b, v3.b}[12], [x3]
Tested with gcc 8.3.0 as an aarch64 cross compiler on an x86_64 system (built
with crosstool-ng 1.24.0-rc3). Output of gcc -v:
Using built-in specs.
COLLECT_GCC=[...]/gcc-8.3-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=[...]/gcc-8.3-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/8.3.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: [...]/.build/aarch64-unknown-linux-gnu/src/gcc/configure
--build=x86_64-build_pc-linux-gnu --host=x86_64-build_pc-linux-gnu
--target=aarch64-unknown-linux-gnu --prefix=[...]/gcc-8.3-aarch64
--with-sysroot=[...]/gcc-8.3-aarch64/aarch64-unknown-linux-gnu/sysroot
--enable-languages=c,c++,fortran --with-pkgversion='crosstool-NG 1.24.0-rc3'
--enable-__cxa_atexit --disable-libmudflap --enable-libgomp --disable-libssp
--disable-libquadmath --disable-libquadmath-support --disable-libsanitizer
--disable-libmpx --with-gmp=[...]/.build/aarch64-unknown-linux-gnu/buildtools
--with-mpfr=[...]/.build/aarch64-unknown-linux-gnu/buildtools
--with-mpc=[...]/.build/aarch64-unknown-linux-gnu/buildtools
--with-isl=[...]/.build/aarch64-unknown-linux-gnu/buildtools --enable-lto
--enable-threads=posix --enable-target-optspace --disable-plugin --disable-nls
--disable-multilib
--with-local-prefix=[...]/gcc-8.3-aarch64/aarch64-unknown-linux-gnu/sysroot
--enable-long-long
Thread model: posix
gcc version 8.3.0 (crosstool-NG 1.24.0-rc3)
>From gcc-bugs-return-639666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:13:39 2019
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Subject: [Bug c++/56643] Failure to match noexcept specifier of friend template function in template class
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This is fixed in trunk, I'm adding the testcase and closing the bug.
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Subject: [Bug c++/56643] Failure to match noexcept specifier of friend template function in template class
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--- Comment #5 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu Apr 4 15:15:59 2019
New Revision: 270144
URL: https://gcc.gnu.org/viewcvs?rev=270144&root=gcc&view=rev
Log:
2019-04-04 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/56643
* g++.dg/cpp0x/noexcept40.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/noexcept40.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/56643] Failure to match noexcept specifier of friend template function in template class
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
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Subject: [Bug c++/65608] [meta-bug] friend issues
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Bug 65608 depends on bug 56643, which changed state.
Bug 56643 Summary: Failure to match noexcept specifier of friend template function in template class
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56643
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #33 from Erik Schnetter <schnetter at gmail dot com> ---
Here is an updated version of the patch that fixincludes both
<sys/sysctl.h> and <sys/ucred.h>, and does not need to touch any sources
files in GCC any more:
Index: fixincludes/inclhack.def
===================================================================
--- fixincludes/inclhack.def (revision 270127)
+++ fixincludes/inclhack.def (working copy)
@@ -1298,6 +1298,69 @@ fix = {
};
/*
+ * macOS 10.14.4 <sys/ucred.h> uses the C _Atomic keyword in C++
+ * code, and this file is included by <sys/sysctl.h>.
+ */
+fix = {
+ hackname = darwin_sysctl3__Atomic;
+ mach = "*-*-darwin18.5.*";
+ files = sys/sysctl.h;
+ select = "#include <sys/ucred.h>";
+
+ c_fix = wrap;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # define _Atomic volatile
+ #endif
+
+ _EOArg_;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # undef _Atomic
+ #endif
+
+ _EOArg_;
+
+ test_text = "#include <sys/sysctl.h>\n";
+};
+
+
+/*
+ * macOS 10.14.4 <sys/ucred.h> uses the C _Atomic keyword in C++
+ * code.
+ */
+fix = {
+ hackname = darwin_ucred__Atomic;
+ mach = "*-*-darwin18.5.*";
+ files = sys/ucred.h;
+ select = "_Atomic";
+
+ c_fix = wrap;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # define _Atomic volatile
+ #endif
+
+ _EOArg_;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # undef _Atomic
+ #endif
+
+ _EOArg_;
+
+ test_text = "#include <sys/ucred.h>\n";
+};
+
+/*
* For the AAB_darwin7_9_long_double_funcs fix to be useful,
* you have to not use "" includes.
*/
-erik
--
Erik Schnetter <schnetter@gmail.com>
http://www.perimeterinstitute.ca/personal/eschnetter/
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
Date: Thu, 04 Apr 2019 15:23:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Note that the intermediate format provides 'current_working_directory' value
that should be easily used to distinguish among same files in different
folders?
Does it work for you?
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Subject: [Bug c/89968] New: attribute packed fails to reduce char vector member alignment
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Bug ID: 89968
Summary: attribute packed fails to reduce char vector member
alignment
Product: gcc
Version: 9.0
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>From the following discussion: https://gcc.gnu.org/ml/gcc/2019-04/msg00030.html
The following test case shows that GCC fails to reduce the alignment of a char
vector member. Clang and ICC succeed and return the expected values from the
two functions (1088 and 64, respectively).
$ cat z.c && gcc -c -O2 -Wall -fdump-tree-optimized=/dev/stdout z.c
struct S
{
char c;
__attribute__ ((aligned (64), packed, vector_size (1024))) char v;
};
int f (void) { return sizeof (struct S); }
int g (void) { return __alignof__ (struct S); }
z.c:4:3: warning: ‘packed’ attribute ignored for field of type ‘char’
[-Wattributes]
4 | __attribute__ ((aligned (64), packed, vector_size (1024))) char v;
| ^~~~~~~~~~~~~
;; Function f (f, funcdef_no=0, decl_uid=1909, cgraph_uid=1, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741824]:
return 2048; ;; Expected 1088
}
;; Function g (g, funcdef_no=1, decl_uid=1912, cgraph_uid=2, symbol_order=1)
g ()
{
<bb 2> [local count: 1073741824]:
return 1024; ;; Expected 64
}
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Subject: [Bug c/89968] attribute packed fails to reduce char vector member alignment
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ABI, diagnostic
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=59220
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also pr59220 for a related bug.
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--- Comment #4 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Yeah, consumer issue, GDB can't deal with location views yet, so it can't tell
apart the views just before the return from that at the return proper. It's
actually a textbook situation of the kind that led me to introduce view
numbering.
>From gcc-bugs-return-639675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:37:04 2019
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From: "schnetter at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 15:37:00 -0000
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--- Comment #34 from Erik Schnetter <schnetter at gmail dot com> ---
Here is an updated version of the patch that fixincludes both
<sys/sysctl.h> and <sys/ucred.h>, and does not need to touch any
sources files in GCC any more:
Index: fixincludes/inclhack.def
===================================================================
--- fixincludes/inclhack.def (revision 270127)
+++ fixincludes/inclhack.def (working copy)
@@ -1298,6 +1298,69 @@ fix = {
};
/*
+ * macOS 10.14.4 <sys/ucred.h> uses the C _Atomic keyword in C++
+ * code, and this file is included by <sys/sysctl.h>.
+ */
+fix = {
+ hackname = darwin_sysctl3__Atomic;
+ mach = "*-*-darwin18.5.*";
+ files = sys/sysctl.h;
+ select = "#include <sys/ucred.h>";
+
+ c_fix = wrap;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # define _Atomic volatile
+ #endif
+
+ _EOArg_;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # undef _Atomic
+ #endif
+
+ _EOArg_;
+
+ test_text = "#include <sys/sysctl.h>\n";
+};
+
+
+/*
+ * macOS 10.14.4 <sys/ucred.h> uses the C _Atomic keyword in C++
+ * code.
+ */
+fix = {
+ hackname = darwin_ucred__Atomic;
+ mach = "*-*-darwin18.5.*";
+ files = sys/ucred.h;
+ select = "_Atomic";
+
+ c_fix = wrap;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # define _Atomic volatile
+ #endif
+
+ _EOArg_;
+
+ c_fix_arg = <<- _EOArg_
+
+ #if defined(__cplusplus) && __cplusplus >= 201103L
+ # undef _Atomic
+ #endif
+
+ _EOArg_;
+
+ test_text = "#include <sys/ucred.h>\n";
+};
+
+/*
* For the AAB_darwin7_9_long_double_funcs fix to be useful,
* you have to not use "" includes.
*/
--
Erik Schnetter <schnetter@gmail.com>
http://www.perimeterinstitute.ca/personal/eschnetter/
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Subject: [Bug c++/61327] Problem with friend template object
Date: Thu, 04 Apr 2019 15:38:00 -0000
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--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu Apr 4 15:38:05 2019
New Revision: 270145
URL: https://gcc.gnu.org/viewcvs?rev=270145&root=gcc&view=rev
Log:
2019-04-04 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/61327
* g++.dg/cpp0x/friend4.C: New.
* g++.dg/cpp0x/friend5.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/friend4.C
trunk/gcc/testsuite/g++.dg/cpp0x/friend5.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:39:36 2019
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Subject: [Bug c++/61327] Problem with friend template object
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/65608] [meta-bug] friend issues
Date: Thu, 04 Apr 2019 15:39:00 -0000
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Bug 65608 depends on bug 61327, which changed state.
Bug 61327 Summary: Problem with friend template object
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61327
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>From gcc-bugs-return-639679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:40:14 2019
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From: "abidh at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/89969] New: [OPENACC] private clause does not work with fortran automatic array
Date: Thu, 04 Apr 2019 15:40:00 -0000
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Bug ID: 89969
Summary: [OPENACC] private clause does not work with fortran
automatic array
Product: gcc
Version: 8.0
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Please look at the test case below. It uses an automatic array in private
clause. With -fopenacc and ptx offloading, the resultant executable crashes at
run time with the following error:
libgomp: cuStreamSynchronize error: an illegal memory access was encountered
subroutine crash1(ngas)
implicit none
integer, intent(in ) :: ngas
integer, dimension(ngas) :: automatic_array
integer :: ilay
!$acc parallel loop private(automatic_array)
do ilay = 1 , ngas
automatic_array(ilay) = ilay
end do
end subroutine crash1
program main
implicit none
integer :: ngas = 10
call crash1(ngas)
end program main
>From gcc-bugs-return-639680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:43:15 2019
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Subject: [Bug debug/89530] Wrong debug informations for C array generated at -Og [gcc-trunk]
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--- Comment #10 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
We'd need to add VTA notes to addressable objects, that currently only get
older var-tracking treatment. It's usually enough, because, being addressable,
they can't really change locations, and, because of pointers and aliasing, VTA
proper would be tricky for them. In this case, in which the dead assignments
are through a reference to the object proper, rather than through a pointer, it
wouldn't be too hard, but VTA is kind of all-or-nothing on a per-object basis.
I don't have concrete plans to address this.
>From gcc-bugs-return-639681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:45:01 2019
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Subject: [Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
DCE drops the dead call to j() after inserting debug temps that reference the
return value of the call, but it fails to adjust/reset the debug temp. Looking
into how to fix it...
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From: "christian.morales.vega at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
Date: Thu, 04 Apr 2019 15:46:00 -0000
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--- Comment #3 from Cristian Morales Vega <christian.morales.vega at gmail dot com> ---
I have just took a look inside one of the intermediate format .gcov files and
didn't see any "current_working_directory". There is a full path "file"
variable though.
Not sure if that's what you mean. In any case anything inside the .gcov files
would not solve my issue. My problem is that all the .gcov files are being
created in the same directory and the .gcov files themselves get overwritten.
So I have
./CMakeFiles/<cmake_target_name>.dir/src/error.cpp.o
./CMakeFiles/<cmake_target_name>.dir/src/error.cpp.gcda
./CMakeFiles/<cmake_target_name>.dir/src/error.cpp.gcno
./test/CMakeFiles/catch_tests.dir/error.cpp.o
./test/CMakeFiles/catch_tests.dir/error.cpp.gcda
./test/CMakeFiles/catch_tests.dir/error.cpp.gcno
And a single "error.cpp.gcda.gcov" file since cmake has run
/usr/bin/gcov -x -i -o <build_dir>/CMakeFiles/<cmake_target_name>.dir/src
<build_dir>/CMakeFiles/cmake_target_name.dir/src/error.cpp.gcda
and
/usr/bin/gcov -x -i -o <build_dir>/test/CMakeFiles/catch_tests.dir
<build_dir>/test/CMakeFiles/catch_tests.dir/error.cpp.gcda
from the same directory, put all the files in a flat tarball and sent it to a
CDash server. So I need the file names written to my hard drive to be different
(i.e. -x to have effect).
>From gcc-bugs-return-639685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:50:29 2019
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65608] [meta-bug] friend issues
Date: Thu, 04 Apr 2019 15:50:00 -0000
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Bug 65608 depends on bug 65619, which changed state.
Bug 65619 Summary: friend declaration with template template parameter not recognized
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65619
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-639684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:50:28 2019
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Subject: [Bug c++/65619] friend declaration with template template parameter not recognized
Date: Thu, 04 Apr 2019 15:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65619
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |paolo.carlini at oracle dot com
Resolution|--- |FIXED
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Done.
>From gcc-bugs-return-639683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 15:50:09 2019
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Subject: [Bug c++/65619] friend declaration with template template parameter not recognized
Date: Thu, 04 Apr 2019 15:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65619
--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu Apr 4 15:49:30 2019
New Revision: 270146
URL: https://gcc.gnu.org/viewcvs?rev=270146&root=gcc&view=rev
Log:
2019-04-04 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/65619
* g++.dg/template/friend67.C: New.
Added:
trunk/gcc/testsuite/g++.dg/template/friend67.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:02:51 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Thu, 04 Apr 2019 16:02:00 -0000
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--- Comment #21 from 康 çŠ <kangshan0910 at hotmail dot com> ---
All of the experiments were did in according to the build steps I just gave to
you.
>From gcc-bugs-return-639687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:02:59 2019
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84382] add command-line options -std=gnu2003 and -std=gnu2008 for gfortran
Date: Thu, 04 Apr 2019 16:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84382
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-04
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fortran is not C! WTF?
>From gcc-bugs-return-639688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:17:26 2019
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Subject: [Bug c/89970] New: [8/9 Regression] ICE in dispatch_function_versions, at config/i386/i386.c:32347
Date: Thu, 04 Apr 2019 16:17:00 -0000
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Bug ID: 89970
Summary: [8/9 Regression] ICE in dispatch_function_versions, at
config/i386/i386.c:32347
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Version: 9.0
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Started with gcc-8 (before 20180525) :
$ cat z1.c
__attribute__((target_clones ("default", "default")))
void f () {}
$ gcc-7 -c z1.c
$
$ gcc-9-20190331 -c z1.c
during IPA pass: targetclone
z1.c: In function 'f.resolver':
z1.c:2:1: internal compiler error: in dispatch_function_versions, at
config/i386/i386.c:32347
2 | void f () {}
| ^~~~
0xd32d02 dispatch_function_versions
../../gcc/config/i386/i386.c:32347
0xd32d02 ix86_generate_version_dispatcher_body
../../gcc/config/i386/i386.c:32714
0x1219c66 create_dispatcher_calls
../../gcc/multiple_target.c:97
0x1219c66 ipa_target_clone
../../gcc/multiple_target.c:509
0x1219c66 execute
../../gcc/multiple_target.c:541
>From gcc-bugs-return-639689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:24:53 2019
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Subject: [Bug c/89971] New: [8/9 Regression] ICE: unspellable token PADDING
Date: Thu, 04 Apr 2019 16:24:00 -0000
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Bug ID: 89971
Summary: [8/9 Regression] ICE: unspellable token PADDING
Product: gcc
Version: 9.0
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Started with gcc-8 (before 20180525) :
$ cat z1.c
#define a(...) int b /##__VA_OPT__(c);
a()
$ gcc-9-20190331 -c z1.c
z1.c:2:1: internal compiler error: unspellable token PADDING
2 | a()
| ^
0x6543ea c_cpp_diagnostic(cpp_reader*, cpp_diagnostic_level,
cpp_warning_reason, rich_location*, char const*, __va_list_tag (*) [1])
../../gcc/c-family/c-common.c:6319
0x1291f42 cpp_diagnostic
../../libcpp/errors.c:75
0x12920c6 cpp_error(cpp_reader*, cpp_diagnostic_level, char const*, ...)
../../libcpp/errors.c:89
0x129b0bd cpp_spell_token(cpp_reader*, cpp_token const*, unsigned char*, bool)
../../libcpp/lex.c:3298
0x129ca87 cpp_token_as_text(cpp_reader*, cpp_token const*)
../../libcpp/lex.c:3314
0x12a210a paste_tokens
../../libcpp/macro.c:821
0x12a5590 paste_all_tokens
../../libcpp/macro.c:898
0x12a5590 cpp_get_token_1
../../libcpp/macro.c:2712
0x664bed c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int)
../../gcc/c-family/c-lex.c:405
0x5fcc60 c_lex_one_token
../../gcc/c/c-parser.c:249
0x6094f4 c_parser_peek_token(c_parser*)
../../gcc/c/c-parser.c:436
0x6094f4 c_parser_next_token_is
../../gcc/c/c-parser.h:167
0x6094f4 c_parser_direct_declarator_inner
../../gcc/c/c-parser.c:3790
0x61d8d1 c_parser_declaration_or_fndef
../../gcc/c/c-parser.c:1999
0x623a53 c_parser_external_declaration
../../gcc/c/c-parser.c:1653
0x624519 c_parser_translation_unit
../../gcc/c/c-parser.c:1534
0x624519 c_parse_file()
../../gcc/c/c-parser.c:19854
0x66ba20 c_common_parse_file()
../../gcc/c-family/c-opts.c:1156
>From gcc-bugs-return-639690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:29:29 2019
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Subject: [Bug c++/89937] For example code, which is valid as either C or C++, optimization seems much better for C
Date: Thu, 04 Apr 2019 16:29:00 -0000
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--- Comment #6 from Walt Karas <wkaras at yahoo dot com> ---
Yes, very sorry, I didn't realize inline was so different in C, and I also
didn't read the generated machine code carefully enough. It does seem
extremely surprising that, for C, the body of an inline function is ignored
without any warning.
>From gcc-bugs-return-639691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:31:33 2019
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Subject: [Bug fortran/89969] [OPENACC] private clause does not work with fortran automatic array
Date: Thu, 04 Apr 2019 16:31:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-04
CC| |cesar at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Cannot test the problem on my mac.
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Subject: [Bug c/89972] New: [8/9 Regression] ICE in expand_call, at calls.c:4229
Date: Thu, 04 Apr 2019 16:33:00 -0000
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Bug ID: 89972
Summary: [8/9 Regression] ICE in expand_call, at calls.c:4229
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Started with gcc-8 (before 20180525) :
$ cat z1.c
struct S {
long a[0] __attribute__ ((aligned (32)));
};
void foo ()
{
struct S b;
f (8.0L, b);
}
$ gcc-9-20190331 -c z1.c
z1.c: In function 'foo':
z1.c:7:3: warning: implicit declaration of function 'f'
[-Wimplicit-function-declaration]
7 | f (8.0L, b);
| ^
z1.c:7:3: note: the ABI for passing parameters with 32-byte alignment has
changed in GCC 4.6
7 | f (8.0L, b);
| ^~~~~~~~~~~
during RTL pass: expand
z1.c:7:3: internal compiler error: in expand_call, at calls.c:4229
0x6b5fb5 expand_call(tree_node*, rtx_def*, int)
../../gcc/calls.c:4227
0x7bd95e expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:11032
0x6c6e9a expand_expr
../../gcc/expr.h:279
0x6c6e9a expand_call_stmt
../../gcc/cfgexpand.c:2724
0x6c6e9a expand_gimple_stmt_1
../../gcc/cfgexpand.c:3691
0x6c6e9a expand_gimple_stmt
../../gcc/cfgexpand.c:3850
0x6cba07 expand_gimple_basic_block
../../gcc/cfgexpand.c:5886
0x6ce096 execute
../../gcc/cfgexpand.c:6509
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Subject: [Bug fortran/89844] CFI_setpointer produces wrong descriptor
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> This PR seems also fixed by revision r270037.
Is a new test needed? If yes, would it help if I do the packaging?
>From gcc-bugs-return-639694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:42:28 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 16:42:00 -0000
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--- Comment #35 from Jürgen Reuter <juergen.reuter at desy dot de> ---
The latest fix doesn't work. It fails at the darwin-driver.c. So yes, all the
files mentioned before have to be modified, asan_mac.cc, sanitizer_mac.cc,
sanitizer_platform_limits_posix.cc, darwin-driver.c
>From gcc-bugs-return-639695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:42:34 2019
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Subject: [Bug c++/89973] New: [9 Regression] ICE in check_address_or_pointer_of_packed_member, at c-family/c-warn.c:2769
Date: Thu, 04 Apr 2019 16:42:00 -0000
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Bug ID: 89973
Summary: [9 Regression] ICE in
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c-family/c-warn.c:2769
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Changed between 20190113 and 20190120 :
$ cat z1.cc
constexpr int a();
template <typename> constexpr void *b = a();
$ g++-9-20190331 -c z1.cc
z1.cc:2:43: internal compiler error: Segmentation fault
2 | template <typename> constexpr void *b = a();
| ^
0xb849bf crash_signal
../../gcc/toplev.c:326
0x797a68 check_address_or_pointer_of_packed_member
../../gcc/c-family/c-warn.c:2769
0x797a68 check_and_warn_address_or_pointer_of_packed_member
../../gcc/c-family/c-warn.c:2875
0x7327ba convert_for_assignment
../../gcc/cp/typeck.c:9094
0x732ad2 convert_for_initialization(tree_node*, tree_node*, tree_node*, int,
impl_conv_rhs, tree_node*, int, int)
../../gcc/cp/typeck.c:9190
0x738828 digest_init_r
../../gcc/cp/typeck2.c:1272
0x73a150 digest_init_flags(tree_node*, tree_node*, int, int)
../../gcc/cp/typeck2.c:1285
0x73a150 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/cp/typeck2.c:824
0x640d5d check_initializer
../../gcc/cp/decl.c:6523
0x642d5c cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc/cp/decl.c:7090
0x6be6b9 cp_parser_init_declarator
../../gcc/cp/parser.c:20525
0x6c0c94 cp_parser_single_declaration
../../gcc/cp/parser.c:28266
0x6c0e6c cp_parser_template_declaration_after_parameters
../../gcc/cp/parser.c:27858
0x6c1477 cp_parser_explicit_template_declaration
../../gcc/cp/parser.c:28104
0x6c1477 cp_parser_template_declaration_after_export
../../gcc/cp/parser.c:28123
0x6c3fe9 cp_parser_declaration
../../gcc/cp/parser.c:13185
0x6c462e cp_parser_translation_unit
../../gcc/cp/parser.c:4698
0x6c462e c_parse_file()
../../gcc/cp/parser.c:41180
0x781cf0 c_common_parse_file()
../../gcc/c-family/c-opts.c:1156
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Subject: [Bug fortran/87919] Incorrect fortran handling of -fno-* options
Date: Thu, 04 Apr 2019 16:46:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
What is the status of this PR? Is it FIXED or not?
>From gcc-bugs-return-639697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:49:05 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 16:49:00 -0000
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--- Comment #36 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #35)
> The latest fix doesn't work. It fails at the darwin-driver.c. So yes, all
> the files mentioned before have to be modified, asan_mac.cc,
> sanitizer_mac.cc,
> sanitizer_platform_limits_posix.cc, darwin-driver.c
that's not how fix includes work;
the idea is to make a change such that the includes can be used "normally"
(which isn't 'modify every use site' ;) )
grep says that ucred.h is included from a *lot* of places in the SDK, so "just
fixing bootstrap" isn't enough, we need a fix that works when building user
code too.
I note that there is __APPLE_API_STRICT_CONFORMANCE which gates the
__APPLE_ABI_UNSTABLE .. perhaps this should be investigated?
>From gcc-bugs-return-639698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 16:56:57 2019
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Subject: [Bug fortran/55591] strict-aliasing & Fortran
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Testing the updated patch
--- ../_clean/gcc/fortran/options.c 2019-03-11 15:11:11.000000000 +0100
+++ gcc/fortran/options.c 2019-04-04 18:55:50.000000000 +0200
@@ -166,6 +166,8 @@ gfc_init_options (unsigned int decoded_o
set_default_std_flags ();
+ flag_strict_aliasing = -1;
+
/* Initialize cpp-related options. */
gfc_cpp_init_options (decoded_options_count, decoded_options);
gfc_diagnostics_init ();
@@ -266,6 +268,10 @@ gfc_post_options (const char **pfilename
sorry ("%<-fexcess-precision=standard%> for Fortran");
flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
+ /* By default use strict-aliasing semantics. */
+ if (flag_strict_aliasing == -1)
+ flag_strict_aliasing = 1;
+
/* Fortran allows associative math - but we cannot reassociate if
we want traps or signed zeros. Cf. also flag_protect_parens. */
if (flag_associative_math == -1)
>From gcc-bugs-return-639699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:15:34 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #37 from Erik Schnetter <schnetter at gmail dot com> ---
(In reply to Jürgen Reuter from comment #35)
> The latest fix doesn't work. It fails at the darwin-driver.c. So yes, all
> the files mentioned before have to be modified, asan_mac.cc,
> sanitizer_mac.cc,
> sanitizer_platform_limits_posix.cc, darwin-driver.c
Did you regenerate the autogenerated fixinclude files? The patch only contains
the manual changes (according to GCC's patch submission guidelines). You need
to run "./genincludes" (?) in the "fixinclude" directory.
-erik
>From gcc-bugs-return-639700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:19:02 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 04 Apr 2019 17:19:00 -0000
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--- Comment #38 from Erik Schnetter <schnetter at gmail dot com> ---
(In reply to Iain Sandoe from comment #36)
> (In reply to Jürgen Reuter from comment #35)
> > The latest fix doesn't work. It fails at the darwin-driver.c. So yes, all
> > the files mentioned before have to be modified, asan_mac.cc,
> > sanitizer_mac.cc,
> > sanitizer_platform_limits_posix.cc, darwin-driver.c
>
> that's not how fix includes work;
> the idea is to make a change such that the includes can be used "normally"
> (which isn't 'modify every use site' ;) )
>
> grep says that ucred.h is included from a *lot* of places in the SDK, so
> "just fixing bootstrap" isn't enough, we need a fix that works when building
> user code too.
I originally assumed that fixincluded files would come first in the include
search path, so that correcting the offending file prevents all problems. That
doesn't seem to be the case -- only files included from user code seem to see
the fixincluded files, whereas system files don't see them. Is this correct? If
so, that certainly makes it difficult to correct a problem, since this would
require all header files that (transitively) include the offending header file
also need to be fixincluded. I'm sure I misunderstand something here.
> I note that there is __APPLE_API_STRICT_CONFORMANCE which gates the
> __APPLE_ABI_UNSTABLE .. perhaps this should be investigated?
I missed this. I'll have a look.
-erik
>From gcc-bugs-return-639701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:21:10 2019
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Subject: [Bug c++/89973] [9 Regression] ICE in check_address_or_pointer_of_packed_member, at c-family/c-warn.c:2769
Date: Thu, 04 Apr 2019 17:21:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-04
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Will fix.
>From gcc-bugs-return-639702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:27:39 2019
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Subject: [Bug c++/89974] New: ICE on a definition of a non-type specialization on a struct object with pointer to member function
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Bug ID: 89974
Summary: ICE on a definition of a non-type specialization on a
struct object with pointer to member function
Product: gcc
Version: 9.0
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The following C++ 2a program causes an ICE. An equivalent program using a
pointer to member data compiles successfully. I came across this while testing
my patch for pr47488, pr89833, and pr89876.
$ cat z.C && gcc -c -O2 -Wall -Wextra -std=c++2a z.C
struct A { void (A::*p)(); };
template <A> struct X { };
X<A{ 0 }> x;
z.C:3:9: internal compiler error: canonical types differ for identical types
‘void (A::*)()’ and ‘void (A::*)()’
3 | X<A{ 0 }> x;
| ^
0xb7ba72 comptypes(tree_node*, tree_node*, int)
/src/gcc/git-svn/gcc/cp/typeck.c:1479
0x9b0829 find_substitution
/src/gcc/git-svn/gcc/cp/mangle.c:692
0x9b8840 write_type
/src/gcc/git-svn/gcc/cp/mangle.c:2054
0x9c10a7 write_template_arg_literal
/src/gcc/git-svn/gcc/cp/mangle.c:3357
0x9bd561 write_expression
/src/gcc/git-svn/gcc/cp/mangle.c:2890
0x9bfdcd write_expression
/src/gcc/git-svn/gcc/cp/mangle.c:3150
0x9bfdcd write_expression
/src/gcc/git-svn/gcc/cp/mangle.c:3150
0x9c572f mangle_template_parm_object(tree_node*)
/src/gcc/git-svn/gcc/cp/mangle.c:4267
0xa8c265 get_template_parm_object
/src/gcc/git-svn/gcc/cp/pt.c:6702
0xa8e048 convert_nontype_argument
/src/gcc/git-svn/gcc/cp/pt.c:7160
0xa91795 convert_template_argument
/src/gcc/git-svn/gcc/cp/pt.c:8070
0xa93370 coerce_template_parms
/src/gcc/git-svn/gcc/cp/pt.c:8547
0xa93a65 coerce_innermost_template_parms
/src/gcc/git-svn/gcc/cp/pt.c:8666
0xa96177 lookup_template_class_1
/src/gcc/git-svn/gcc/cp/pt.c:9357
0xa9885d lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
/src/gcc/git-svn/gcc/cp/pt.c:9716
0xb240c0 finish_template_type(tree_node*, tree_node*, int)
/src/gcc/git-svn/gcc/cp/semantics.c:3312
0xa223e1 cp_parser_template_id
/src/gcc/git-svn/gcc/cp/parser.c:16479
0xa2f9be cp_parser_class_name
/src/gcc/git-svn/gcc/cp/parser.c:23274
0xa0d6d7 cp_parser_qualifying_entity
/src/gcc/git-svn/gcc/cp/parser.c:6693
0xa0c6cd cp_parser_nested_name_specifier_opt
/src/gcc/git-svn/gcc/cp/parser.c:6379
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-639703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:37:57 2019
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From: "tom at honermann dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89923] printf format check and char8_t
Date: Thu, 04 Apr 2019 17:37:00 -0000
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--- Comment #2 from Tom Honermann <tom at honermann dot net> ---
I think my preferred fix to this is to introduce new length modifiers for the
"%s" conversion specifier for all of char8_t, char16_t, and char32_t.
>From gcc-bugs-return-639704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:41:14 2019
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Subject: [Bug c++/89923] printf format check and char8_t
Date: Thu, 04 Apr 2019 17:41:00 -0000
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--- Comment #3 from Florian Weimer <fw at gcc dot gnu.org> ---
But the precedent with wchar_t is that the type of the format string determines
the type of the %s arguments. I'm not sure if that's a good precedent, but
it's what we have today.
>From gcc-bugs-return-639705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:44:40 2019
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Subject: [Bug middle-end/89975] New: Compile-time hog w/ large values of --param uninlined-function-insns
Date: Thu, 04 Apr 2019 17:44:00 -0000
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Bug ID: 89975
Summary: Compile-time hog w/ large values of --param
uninlined-function-insns
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Target Milestone: ---
9.0.0-alpha20190331 snapshot (r270048) takes inordinate, though finite, time to
compile gcc/testsuite/g++.dg/warn/Wzero-as-null-pointer-constant-2.C w/ -O1
--param uninlined-function-insns=200000.
perf top:
60.53% cc1plus [.] estimate_calls_size_and_time
10.24% cc1plus [.] estimate_size_after_inlining
5.80% cc1plus [.] sreal::operator/
4.95% cc1plus [.] predicate::evaluate
4.63% cc1plus [.] profile_count::to_sreal_scale
3.49% cc1plus [.] cgraph_edge::sreal_frequency
3.27% cc1plus [.] update_callee_keys
2.50% cc1plus [.] can_inline_edge_by_limits_p
1.52% cc1plus [.] sreal::operator*
0.69% cc1plus [.] sreal::operator+
0.60% cc1plus [.] cgraph_node::get_availability
0.35% cc1plus [.] want_inline_small_function_p
0.27% cc1plus [.] sreal::shift_right
0.18% cc1plus [.] cgraph_edge::maybe_hot_p
0.18% cc1plus [.] edge_badness
0.17% cc1plus [.] symtab_node::ultimate_alias_target_1
and much later:
68.20% cc1plus [.] df_live_bb_local_compute
10.12% cc1plus [.] df_live_set_all_dirty
7.83% libc-2.29.so [.] memset
7.46% cc1plus [.] bitmap_set_bit
2.07% cc1plus [.] df_live_alloc
1.51% cc1plus [.] df_rd_transfer_function
1.06% cc1plus [.] df_count_refs
0.62% cc1plus [.] bitmap_elt_clear_from
0.40% cc1plus [.] bitmap_clear
0.20% cc1plus [.] df_live_local_compute
0.15% cc1plus [.] df_reorganize_refs_by_reg
0.12% cc1plus [.] move_loop_invariants
0.10% cc1plus [.] df_worklist_dataflow
0.05% cc1plus [.] bitmap_bit_p
0.03% cc1plus [.] may_trap_p_1
0.03% cc1plus [.] et_splay
0.02% cc1plus [.] df_rd_simulate_one_insn
0.02% cc1plus [.] bitmap_copy
Is this something to expect w/ large values of --param
uninlined-function-insns?
>From gcc-bugs-return-639706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:50:20 2019
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Subject: [Bug c++/89976] New: missing uninitialized warning: laundering via passing object through a function
Date: Thu, 04 Apr 2019 17:50:00 -0000
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Bug ID: 89976
Summary: missing uninitialized warning: laundering via passing
object through a function
Product: gcc
Version: 9.0
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// case 1 - https://godbolt.org/z/02zu_3
struct X
{
int x, y;
X() : y(0) {}
};
X foo()
{
X x;
return x;
}
int main()
{
X x = foo();
return x.x;
}
// case 2 - https://godbolt.org/z/ev4Fs4
struct X
{
int x;
};
struct Y : X
{
int y;
Y() {}
};
Y foo()
{
Y x;
return x;
}
int main()
{
Y x = foo();
return x.x;
}
// case 3 - https://godbolt.org/z/LZvtcU
struct X
{
int x;
};
struct Y
{
Y() {}
};
struct Z : X, Y
{
int z;
};
Z foo()
{
Z x;
return x;
}
int main()
{
Z x = foo();
return x.x;
}
>From gcc-bugs-return-639707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 17:57:01 2019
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Subject: [Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
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--- Comment #4 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Created attachment 46089
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46089&action=edit
candidate patch
Here's what I'm testing
>From gcc-bugs-return-639708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 18:25:34 2019
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Subject: [Bug c/89970] [8/9 Regression] ICE in dispatch_function_versions, at config/i386/i386.c:32347
Date: Thu, 04 Apr 2019 18:25:00 -0000
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Hits assert in i386.c, dispatch_function_versions:
/* At least one more version other than the default. */
num_versions = fndecls->length ();
gcc_assert (num_versions >= 2);
But... this just asserts on the data, passed via target hook from middle-end.
>From gcc-bugs-return-639709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 18:29:59 2019
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Subject: [Bug middle-end/89970] [8/9 Regression] ICE in dispatch_function_versions, at config/i386/i386.c:32347
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-04
Component|c |middle-end
Target Milestone|--- |8.4
Ever confirmed|0 |1
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Confirmed as a problem in the middle-end.
>From gcc-bugs-return-639710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 18:33:22 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #39 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Erik Schnetter from comment #38)
> (In reply to Iain Sandoe from comment #36)
> > (In reply to Jürgen Reuter from comment #35)
> > > The latest fix doesn't work. It fails at the darwin-driver.c. So yes, all
> > > the files mentioned before have to be modified, asan_mac.cc,
> > > sanitizer_mac.cc,
> > > sanitizer_platform_limits_posix.cc, darwin-driver.c
> >
> > that's not how fix includes work;
> > the idea is to make a change such that the includes can be used "normally"
> > (which isn't 'modify every use site' ;) )
> >
> > grep says that ucred.h is included from a *lot* of places in the SDK, so
> > "just fixing bootstrap" isn't enough, we need a fix that works when building
> > user code too.
>
> I originally assumed that fixincluded files would come first in the include
> search path, so that correcting the offending file prevents all problems.
> That doesn't seem to be the case -- only files included from user code seem
> to see the fixincluded files, whereas system files don't see them. Is this
> correct? If so, that certainly makes it difficult to correct a problem,
> since this would require all header files that (transitively) include the
> offending header file also need to be fixincluded. I'm sure I misunderstand
> something here.
no, you haven't missed anything - have you examined the output in
gcc/includes-fixed and checked that the changes you expect have been made?
you can examine the order of the search paths for the includes (look at the
output of gcc -v)
> > I note that there is __APPLE_API_STRICT_CONFORMANCE which gates the
> > __APPLE_ABI_UNSTABLE .. perhaps this should be investigated?
>
> I missed this. I'll have a look.
>From gcc-bugs-return-639711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 18:45:51 2019
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Subject: [Bug target/89955] riscv.h improperly defines STARTFILE_PREFIX_SPEC spec
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Jim Wilson <wilson at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |wilson at gcc dot gnu.org
--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> ---
There should not be a problem working with the sysroot, because as Andreas
mentioned, the paths are relative to the sysroot base.
This does require cooperation from the C library though. If the C library
isn't installing itself into the same directories that the compiler is
searching, then you will have problems. You can either fix the C library or
fix gcc, so that the set of dirs used are the same. Or add a bunch of symbolic
links to connect the two together.
The scheme specified by STARTFILE_PREFIX_SPEC is a reasonable one. I don't
think it is officially documented as part of the psABI, but I think it makes
sense for this scheme to be the default. linux glibc already has support to
install in the right dirs, and presumably the freebsd C library is also
installing in the right dirs. This support also works for embedded elf
toolchains, though in practice it doesn't get used because we use the multilib
support for newlib, and hence we end up using multilib paths instead of the
paths specified by STARTFILE_PREFIX_SPEC. But it is there if someone wants to
use it.
I think if you don't want to use this scheme, and won't be supporting more than
one ABI, then you should just override it for your OS.
If you can't override it for your OS, then we would have to copy this value
into linux.h, freebsd.h, and elf.h. Oh, and maybe rtems.h too. That would be
a little inconvenient.
>From gcc-bugs-return-639712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 18:49:33 2019
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Subject: [Bug middle-end/89975] Compile-time hog w/ large values of --param uninlined-function-insns
Date: Thu, 04 Apr 2019 18:49:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The param is there to limit compile time after all.
>From gcc-bugs-return-639713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 19:47:29 2019
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Subject: [Bug middle-end/89977] New: missing -Wstringop-overflow with an out-of-bounds int128_t range
Date: Thu, 04 Apr 2019 19:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89977
Bug ID: 89977
Summary: missing -Wstringop-overflow with an out-of-bounds
int128_t range
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Additional testing of the patch for pr89957 exposed the following:
GCC diagnoses the buffer overflow in f() below but fails to diagnose the same
buffer overflow in g(). The get_range_info() function returns VR_VARYING for
the int128_t variable in g().
$ cat z.c && gcc -S -O2 -Wall -Wextra -fdump-tree-optimized=/dev/stdout z.c
char a[3];
__attribute__ ((noipa))
void f (int n)
{
if (n < 7)
n = 7;
__builtin_memset (a, 0, n);
}
__attribute__ ((noipa))
void g (__int128_t n)
{
if (n < 7)
n = 7;
__builtin_memset (a, 0, n);
}
z.c: In function ‘f’:
z.c:8:3: warning: ‘__builtin_memset’ forming offset [4, 7] is out of the bounds
[0, 3] of object ‘a’ with type ‘char[3]’ [-Warray-bounds]
8 | __builtin_memset (a, 0, n);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
z.c:1:6: note: ‘a’ declared here
1 | char a[3];
| ^
;; Function f (f, funcdef_no=0, decl_uid=1907, cgraph_uid=1, symbol_order=1)
__attribute__((noipa, noinline, noclone, no_icf))
f (int n)
{
long unsigned int _1;
<bb 2> [local count: 1073741824]:
n_3 = MAX_EXPR <n_2(D), 7>;
_1 = (long unsigned int) n_3;
__builtin_memset (&a, 0, _1); [tail call]
return;
}
;; Function g (g, funcdef_no=1, decl_uid=1910, cgraph_uid=2, symbol_order=2)
__attribute__((noipa, noinline, noclone, no_icf))
g (__int128 n)
{
long unsigned int _1;
<bb 2> [local count: 1073741824]:
n_3 = MAX_EXPR <n_2(D), 7>;
_1 = (long unsigned int) n_3;
__builtin_memset (&a, 0, _1); [tail call]
return;
}
>From gcc-bugs-return-639714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:02:11 2019
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Subject: [Bug c++/89948] [9 Regression] ICE in fold_convert_loc, at fold-const.c:2430
Date: Thu, 04 Apr 2019 20:02:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-639715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:07:03 2019
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Subject: [Bug c++/89937] For example code, which is valid as either C or C++, optimization seems much better for C
Date: Thu, 04 Apr 2019 20:07:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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| |a/show_bug.cgi?id=64875
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
bug 64875 seems relevant here
>From gcc-bugs-return-639716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:10:38 2019
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Subject: [Bug web/89964] Remove the "First, you must pick a product on which to enter a bug:" page
Date: Thu, 04 Apr 2019 20:10:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-639717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:10:54 2019
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Subject: [Bug c++/89966] [9 Regression] non-type template argument rejects sizeof operator result
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-639719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:13:48 2019
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Subject: [Bug web/89964] Remove the "First, you must pick a product on which to enter a bug:" page
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
I suggested splitting the bugzillas into 2 in bug 29304 comment 4 but Andrew
seemed to think it was ok to keep them together
>From gcc-bugs-return-639718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:13:33 2019
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Subject: [Bug c/89968] attribute packed fails to reduce char vector member alignment
Date: Thu, 04 Apr 2019 20:13:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
One problem is the order of the attributes applying here. vector_size applies
after all the others as that is the order in the program.
>From gcc-bugs-return-639720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:18:08 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Thu, 04 Apr 2019 20:18:00 -0000
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--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Liška from comment #8)
> Ok, let me first focus on the functional part of the patch.
> If I'm correct feature_list in get_builtin_code_for_version function should
> be basically aligned with isa_names_table in fold_builtin_cpu. Difference is
> following:
>
> +"avx5124fmaps"
> +"avx5124vnniw"
> +"avx512bitalg"
> +"avx512bw"
> +"avx512cd"
> +"avx512dq"
> +"avx512er"
> +"avx512ifma"
> +"avx512pf"
> +"avx512vbmi"
> +"avx512vbmi2"
> +"avx512vl"
> +"avx512vnni"
> +"avx512vpopcntdq"
> +"cmov"
> +"gfni"
> +"vpclmulqdq"
>
> Adding that should be possible, but one needs to define a priorities of
> these as seen here:
>
> ```
> /* Priority of i386 features, greater value is higher priority. This is
> used to decide the order in which function dispatch must happen. For
> instance, a version specialized for SSE4.2 should be checked for
> dispatch
> before a version for SSE3, as SSE4.2 implies SSE3. */
> enum feature_priority
> ```
>
> H.J. can you please help me with the priorities?
What do we gain with these extra target attributes for function
multiversioning?
>From gcc-bugs-return-639721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:18:30 2019
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Subject: [Bug translation/40883] [meta-bug] Translation breakage with trivial fixes
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on|89936 |
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Roland Illig from comment #5)
> I wouldn't classify bug 89936 as trivial as it strongly recommends to write
> a linter, and that might take a while. Especially since the GCC project
> seems to avoid these consistency linters; at least that's my impression from
> the last few years as the German translator. As I said in bug 89936, there
> are quite a few inconsistencies in the messages that could easily be caught
> by a linter.
ok, removed
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89936
[Bug 89936] wrong punctuation in tree-profile.c
>From gcc-bugs-return-639722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:22:06 2019
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Subject: [Bug debug/89905] gcc generates wrong debug information at -Og
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=78685
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
>
> Doing the suggested resetting "fixes" the issue (gdb prints <optimized out>).
>
"fixes" being in scare-quotes because that really just turns it into bug 78685
>From gcc-bugs-return-639723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:23:14 2019
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Subject: [Bug target/89877] [ARC] miscompilation due to missing cc clobber in longlong.h: add_ssaaaa()/sub_ddmmss()
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Vineet Gupta <vgupta at synopsys dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Vineet Gupta <vgupta at synopsys dot com> ---
Marking as fixed, please backport to gcc-8-stable !
Thx,
-Vineet
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Subject: [Bug c++/87366] [7/8/9 Regression] SFINAE trait as template parameter causes incorrect application of trait to other areas
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-639725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:29:04 2019
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Subject: [Bug target/89967] Inefficient code generation for vld2q_lane_u8 under aarch64
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-04
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There are two seperate issues which is causing the inefficient code.
One is the first set of mov should really be movi; I don't know why the
constant formation was moved out of the loop.
The second issue is the register allocation is not doing a good job for OImode,
there are some clobber rtl there which might be getting in the way; I have not
looked into or understand why the clobber rtl is needed.
>From gcc-bugs-return-639726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:39:07 2019
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--- Comment #2 from anlauf at gcc dot gnu.org ---
Author: anlauf
Date: Thu Apr 4 20:38:33 2019
New Revision: 270150
URL: https://gcc.gnu.org/viewcvs?rev=270150&root=gcc&view=rev
Log:
2019-04-04 Harald Anlauf <anlauf@gmx.de>
PR fortran/89004
* check.c (gfc_check_transfer): Reject procedures as actual
arguments for SOURCE and MOLD of TRANSFER intrinsic.
PR fortran/89004
* gfortran.dg/pr85797.f90: Adjust testcase.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/check.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/pr85797.f90
>From gcc-bugs-return-639727-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:48:01 2019
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From: "vincent.lextrait at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89978] New: Extraneous template keyword not rejected
Date: Thu, 04 Apr 2019 20:48:00 -0000
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Bug ID: 89978
Summary: Extraneous template keyword not rejected
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
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Priority: P3
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The compiler does not reject the following:
struct A{
void f(){}
};
struct B{
static A& n(){
return *new A();
}
};
template <typename T>
struct C{
void g(){
T::n().template f();
}
};
int main(){
(new C<B>())->g();
}
Function A::f is not template.
>From gcc-bugs-return-639728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:48:52 2019
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
Date: Thu, 04 Apr 2019 20:48:00 -0000
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--- Comment #21 from anlauf at gcc dot gnu.org ---
(In reply to anlauf from comment #20)
> Patch here:
>
> https://gcc.gnu.org/ml/fortran/2019-04/msg00003.html
Patch applied to trunk so far.
Unfortunately, I had the wrong PR in the ChangeLog (PR89004). :-(
Sorry for that. I should get that right for the backports.
Will wait for a couple of days to see if there is further fallout.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89399] [7/8/9 Regression] ICE: RTL check: expected code 'set', 'clobber' or 'clobber_high', have 'parallel' in combine_reaching_defs, at ree.c:783
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--- Comment #6 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Thu Apr 4 20:52:16 2019
New Revision: 270151
URL: https://gcc.gnu.org/viewcvs?rev=270151&root=gcc&view=rev
Log:
PR rtl-optimization/89399
* ree.c (combine_set_extension): Use single_set rather than
digging into PATTERN for items on the candidate list.
(combine_reaching_defs): Likewise.
PR rtl-optimization/89399
* gcc.c-torture/compile/pr89399.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr89399.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ree.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:55:51 2019
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89399] [7/8 Regression] ICE: RTL check: expected code 'set', 'clobber' or 'clobber_high', have 'parallel' in combine_reaching_defs, at ree.c:783
Date: Thu, 04 Apr 2019 20:55:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] ICE: RTL |[7/8 Regression] ICE: RTL
|check: expected code 'set', |check: expected code 'set',
|'clobber' or |'clobber' or
|'clobber_high', have |'clobber_high', have
|'parallel' in |'parallel' in
|combine_reaching_defs, at |combine_reaching_defs, at
|ree.c:783 |ree.c:783
--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk. Backporting to the release branches would certainly be
possible if someone were to trip over this issue in real world situations.
>From gcc-bugs-return-639731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 20:59:49 2019
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/41650] [Cleanup] Use gfc_expr_attr in resolve_allocate_expr/resolve_deallocate_expr
Date: Thu, 04 Apr 2019 20:59:00 -0000
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janus at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|INVALID |---
--- Comment #4 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #3)
> > Is this still valid?
Definitely still valid. Apart from a pure cleanup, there might even be cases
where 'is_abstract' is not set correctly (should be checked!).
> No answer, closing as INVALID.
Please leave bugs alone that you don't understand. Reopening ...
>From gcc-bugs-return-639732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 21:11:30 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Thu, 04 Apr 2019 21:11:00 -0000
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--- Comment #10 from Nikolay Bogoychev <nheart at gmail dot com> ---
(In reply to H.J. Lu from comment #9)
> (In reply to Martin Liška from comment #8)
> > Ok, let me first focus on the functional part of the patch.
> > If I'm correct feature_list in get_builtin_code_for_version function should
> > be basically aligned with isa_names_table in fold_builtin_cpu. Difference is
> > following:
> >
> > +"avx5124fmaps"
> > +"avx5124vnniw"
> > +"avx512bitalg"
> > +"avx512bw"
> > +"avx512cd"
> > +"avx512dq"
> > +"avx512er"
> > +"avx512ifma"
> > +"avx512pf"
> > +"avx512vbmi"
> > +"avx512vbmi2"
> > +"avx512vl"
> > +"avx512vnni"
> > +"avx512vpopcntdq"
> > +"cmov"
> > +"gfni"
> > +"vpclmulqdq"
> >
> > Adding that should be possible, but one needs to define a priorities of
> > these as seen here:
> >
> > ```
> > /* Priority of i386 features, greater value is higher priority. This is
> > used to decide the order in which function dispatch must happen. For
> > instance, a version specialized for SSE4.2 should be checked for
> > dispatch
> > before a version for SSE3, as SSE4.2 implies SSE3. */
> > enum feature_priority
> > ```
> >
> > H.J. can you please help me with the priorities?
>
> What do we gain with these extra target attributes for function
> multiversioning?
Hey,
tl;dr We are able to target specific processors and not crash on Knight's Mill
and Knight's landing.
The problem is that AVX-512 has a 10000 subversions
https://en.wikipedia.org/wiki/AVX-512#CPUs_with_AVX-512
Some of them completely overlap (eg VL DQ and BW), however others are limited
to specific processors. We are developing an application that uses a lot of
intrinsics and we are targetting several different architectures. We rely on
instructions that are included in AVX512BW and if we target the closest
available working thing (AVX512F), we crash with illegal instruction on
Knight's Landing and Knight's Mill processors (which should use the AVX2
codepath instead).
We are also about to add some VNNI code for upcoming Intel processors and we
would need a function version for those, because AVX512F is too broad.
Cheers,
Nick
>From gcc-bugs-return-639733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 21:11:46 2019
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Subject: [Bug fortran/84382] add command-line options -std=gnu2003 and -std=gnu2008 for gfortran
Date: Thu, 04 Apr 2019 21:11:00 -0000
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #2 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> Fortran is not C!
True. Fortran is not C is not C++. The main difference wrt this PR is possibly
that the latter two have a large enough user base, so that a significant amount
of people actually use the options mentioned above.
> WTF?
Giving that questions back to you, Dominique: WTF? Which problem do you think
you solve by closing PRs that have not been fixed?
>From gcc-bugs-return-639734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 21:14:58 2019
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Subject: [Bug tree-optimization/89582] Suboptimal code generated for floating point struct in -O3 compare to -O2
Date: Thu, 04 Apr 2019 21:14:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
The same value in different locations (say an integer register and fp register)
is represented as the PARALLEL of the two locations. Various ports do this
already.
The value of the expression can also be a @code{parallel} RTX@. This is
used when an argument is passed in multiple locations. The mode of the
@code{parallel} should be the mode of the entire argument. The
@code{parallel} holds any number of @code{expr_list} pairs; each one
describes where part of the argument is passed. In each
@code{expr_list} the first operand must be a @code{reg} RTX for the hard
register in which to pass this part of the argument, and the mode of the
register RTX indicates how large this part of the argument is. The
second operand of the @code{expr_list} is a @code{const_int} which gives
the offset in bytes into the entire argument of where this part starts.
As a special exception the first @code{expr_list} in the @code{parallel}
RTX may have a first operand of zero. This indicates that the entire
argument is also stored on the stack.
>From gcc-bugs-return-639735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 21:46:54 2019
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From: "gcc@christoph-conrads.name" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/89979] New: subtract_with_carry_engine incorrect carry flag
Date: Thu, 04 Apr 2019 21:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89979
Bug ID: 89979
Summary: subtract_with_carry_engine incorrect carry flag
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 46090
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46090&action=edit
The initial state in combination with the incorrect carry computation makes the
PRNG enter the unescapable all zero state.
The carry inside `std::subtract_with_carry_engine` is computed incorrectly if
word_size == std::numeric_limits<result_type>::digits.
The bug can be triggered neither by std::ranlux24 nor by std::ranlux48.
The bug occurs with GCC 7.3.0, GCC 8.2.0, and Clang when using the GNU Standard
C++ Library shipping with GCC 7.3.0.
$ gcc --version
gcc (Gentoo 7.3.0-r3 p1.4) 7.3.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ g++-7.3.0 -Wextra -Wall -std=c++11 -pedantic -v -save-temps
~/libstdcxx-swc-bug.cpp
Using built-in specs.
COLLECT_GCC=g++-7.3.0
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/7.3.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-7.3.0-r3/work/gcc-7.3.0/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/7.3.0
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/7.3.0
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/7.3.0/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/7.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include/g++-v7
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/7.3.0/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --enable-nls --without-included-gettext
--enable-checking=release --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo 7.3.0-r3 p1.4' --disable-esp --enable-libstdcxx-time
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --disable-multilib --with-multilib-list=m64
--disable-altivec --disable-fixed-point --enable-targets=all --enable-libgomp
--disable-libmudflap --disable-libssp --disable-libcilkrts --disable-libmpx
--enable-vtable-verify --enable-libvtv --enable-lto --without-isl
--enable-libsanitizer --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 7.3.0 (Gentoo 7.3.0-r3 p1.4)
COLLECT_GCC_OPTIONS='-Wextra' '-Wall' '-std=c++11' '-Wpedantic' '-v'
'-save-temps' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/libexec/gcc/x86_64-pc-linux-gnu/7.3.0/cc1plus -E -quiet -v -D_GNU_SOURCE
/home/starfish/libstdcxx-swc-bug.cpp -mtune=generic -march=x86-64 -std=c++11
-Wextra -Wall -Wpedantic -fpch-preprocess -o libstdcxx-swc-bug.ii
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include/g++-v7
/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include/g++-v7/x86_64-pc-linux-gnu
/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include/g++-v7/backward
/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include
/usr/lib/gcc/x86_64-pc-linux-gnu/7.3.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-Wextra' '-Wall' '-std=c++11' '-Wpedantic' '-v'
'-save-temps' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/libexec/gcc/x86_64-pc-linux-gnu/7.3.0/cc1plus -fpreprocessed
libstdcxx-swc-bug.ii -quiet -dumpbase libstdcxx-swc-bug.cpp -mtune=generic
-march=x86-64 -auxbase libstdcxx-swc-bug -Wextra -Wall -Wpedantic -std=c++11
-version -o libstdcxx-swc-bug.s
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>From gcc-bugs-return-639736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 21:50:55 2019
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Subject: [Bug libstdc++/89979] subtract_with_carry_engine incorrect carry flag
Date: Thu, 04 Apr 2019 21:50:00 -0000
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--- Comment #1 from Christoph Conrads <gcc@christoph-conrads.name> ---
There is no attachment with the preprocessed code demonstrating the problem
because the this code is 1.2 MB large.
>From gcc-bugs-return-639737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 22:01:06 2019
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Subject: [Bug middle-end/89934] [9 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 21:59:49 2019
New Revision: 270152
URL: https://gcc.gnu.org/viewcvs?rev=270152&root=gcc&view=rev
Log:
PR middle-end/89934 - ICE on a call with fewer arguments to strncpy declared
without prototype
gcc/ChangeLog:
PR middle-end/89934
* gimple-ssa-warn-restrict.c (builtin_access::builtin_access): Bail
out if the number of arguments is less than expected.
gcc/testsuite/ChangeLog:
PR middle-end/89934
* gcc.dg/Wrestrict-19.c: New test.
* gcc.dg/Wrestrict-5.c: Add comment. Remove unused code.
Added:
trunk/gcc/testsuite/gcc.dg/Wrestrict-19.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-warn-restrict.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/Wrestrict-5.c
>From gcc-bugs-return-639738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 22:01:27 2019
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Subject: [Bug middle-end/89934] [8 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
Date: Thu, 04 Apr 2019 22:01:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[9 Regression] ICE on a |[8 Regression] ICE on a
|call with fewer arguments |call with fewer arguments
|to strncpy declared without |to strncpy declared without
|prototype |prototype
Known to fail| |8.3.0
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in GCC 9 in r270152.
>From gcc-bugs-return-639739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 22:16:33 2019
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Subject: [Bug debug/55585] compile time hog at -O1 -fboundscheck -g
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
% time gfortran-fsf-5 -c -g -O1 -fbounds-check pr55585.f90
74.868u 1.625s 1:16.58 99.8% 0+0k 0+0io 26pf+0w
% time gfortran-fsf-6 -c -g -O1 -fbounds-check pr55585.f90
4.470u 0.159s 0:04.64 99.5% 0+0k 0+0io 5pf+0w
% time gfortran-fsf-7 -c -g -O1 -fbounds-check pr55585.f90
4.344u 0.167s 0:04.53 99.3% 0+0k 0+0io 4pf+0w
% time gfortran -c -g -O1 -fbounds-check pr55585.f90
gfortran-fsf-6 is gcc version 6.5.0. So the "significant slowdowns at -O1
-fbounds-check" seems to have been fixed since at least 6.5. Closing.
>From gcc-bugs-return-639740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 22:16:46 2019
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Subject: [Bug middle-end/89934] [8 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 22:16:11 2019
New Revision: 270153
URL: https://gcc.gnu.org/viewcvs?rev=270153&root=gcc&view=rev
Log:
Backport from 9.0.
PR middle-end/89934 - ICE on a call with fewer arguments to strncpy declared
without prototype
gcc/ChangeLog:
PR middle-end/89934
* gimple-ssa-warn-restrict.c (builtin_access::builtin_access): Bail
out if the number of arguments is less than expected.
gcc/testsuite/ChangeLog:
PR middle-end/89934
* gcc.dg/Wrestrict-19.c: New test.
* gcc.dg/Wrestrict-5.c: Add comment. Remove unused code.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Wrestrict-19.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/gimple-ssa-warn-restrict.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/Wrestrict-5.c
>From gcc-bugs-return-639741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 22:17:36 2019
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Subject: [Bug middle-end/89934] [8 Regression] ICE on a call with fewer arguments to strncpy declared without prototype
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch backported to GCC 8 via r270153.
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Subject: [Bug middle-end/89911] [9 Regression] ICE in get_attr_nonstring_decl, at calls.c:1502
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89911
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 22:38:10 2019
New Revision: 270154
URL: https://gcc.gnu.org/viewcvs?rev=270154&root=gcc&view=rev
Log:
PR middle-end/89957 - ICE calling strnlen with an int128_t bound in a known
range
PR middle-end/89911 - [9 Regression] ICE in get_attr_nonstring_decl
gcc/ChangeLog:
PR middle-end/89957
PR middle-end/89911
* builtins.c (expand_builtin_strnlen): Make sure wi::ltu_p operands
have the same precision since the function crashes otherwise.
* calls.c (maybe_warn_nonstring_arg): Avoid assuming strnlen() call
has non-zero arguments.
gcc/testsuite/ChangeLog:
PR middle-end/89957
PR middle-end/89911
* gcc.dg/Wstringop-overflow-13.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wstringop-overflow-13.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/calls.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/89957] ICE calling strnlen with an int128_t bound in a known range
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89957
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 22:38:10 2019
New Revision: 270154
URL: https://gcc.gnu.org/viewcvs?rev=270154&root=gcc&view=rev
Log:
PR middle-end/89957 - ICE calling strnlen with an int128_t bound in a known
range
PR middle-end/89911 - [9 Regression] ICE in get_attr_nonstring_decl
gcc/ChangeLog:
PR middle-end/89957
PR middle-end/89911
* builtins.c (expand_builtin_strnlen): Make sure wi::ltu_p operands
have the same precision since the function crashes otherwise.
* calls.c (maybe_warn_nonstring_arg): Avoid assuming strnlen() call
has non-zero arguments.
gcc/testsuite/ChangeLog:
PR middle-end/89957
PR middle-end/89911
* gcc.dg/Wstringop-overflow-13.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wstringop-overflow-13.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/calls.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/89957] ICE calling strnlen with an int128_t bound in a known range
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed via r270154.
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Subject: [Bug middle-end/89911] [9 Regression] ICE in get_attr_nonstring_decl, at calls.c:1502
Date: Thu, 04 Apr 2019 22:39:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed via r270154.
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Subject: [Bug c++/89974] ICE on a definition of a non-type specialization on a struct object with pointer to member function
Date: Thu, 04 Apr 2019 23:09:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-04
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
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Subject: [Bug c++/89833] [9 Regression] sorry, unimplemented: string literal in function template signature
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89833
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 23:10:23 2019
New Revision: 270155
URL: https://gcc.gnu.org/viewcvs?rev=270155&root=gcc&view=rev
Log:
PR c++/89974 - ICE on a definition of a non-type specialization on a struct
object with pointer to member function
PR c++/89878 - same specializations on a zero-initialized struct object as a
non-type parameter treated as distinct
PR c++/89833 - sorry, unimplemented: string literal in function template
signature
PR c++/47488 - sorry, unimplemented: string literal in function template
signature
gcc/cp/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* decl.c (reshape_init_array_1): Strip trailing zero-initializers
from arrays of trivial type and known size.
* mangle.c (write_expression): Convert braced initializer lists
to STRING_CSTs.
(write_expression): Trim trailing zero-initializers from arrays
of trivial type.
(write_template_arg_literal): Mangle strings the same as braced
initializer lists.
gcc/testsuite/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* gcc/testsuite/g++.dg/abi/mangle69.C: New test.
* gcc/testsuite/g++.dg/abi/mangle70.C: New test.
* gcc/testsuite/g++.dg/abi/mangle71.C: New test.
* gcc/testsuite/g++.dg/abi/mangle72.C: New test.
* gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class15.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class16.C: New test.
* gcc/testsuite/g++.dg/init/array51.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/abi/mangle69.C
trunk/gcc/testsuite/g++.dg/abi/mangle70.C
trunk/gcc/testsuite/g++.dg/abi/mangle71.C
trunk/gcc/testsuite/g++.dg/abi/mangle72.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class15.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class16.C
trunk/gcc/testsuite/g++.dg/init/array51.C
trunk/gcc/testsuite/g++.dg/template/nontype29.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/mangle.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/89974] ICE on a definition of a non-type specialization on a struct object with pointer to member function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89974
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 23:10:23 2019
New Revision: 270155
URL: https://gcc.gnu.org/viewcvs?rev=270155&root=gcc&view=rev
Log:
PR c++/89974 - ICE on a definition of a non-type specialization on a struct
object with pointer to member function
PR c++/89878 - same specializations on a zero-initialized struct object as a
non-type parameter treated as distinct
PR c++/89833 - sorry, unimplemented: string literal in function template
signature
PR c++/47488 - sorry, unimplemented: string literal in function template
signature
gcc/cp/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* decl.c (reshape_init_array_1): Strip trailing zero-initializers
from arrays of trivial type and known size.
* mangle.c (write_expression): Convert braced initializer lists
to STRING_CSTs.
(write_expression): Trim trailing zero-initializers from arrays
of trivial type.
(write_template_arg_literal): Mangle strings the same as braced
initializer lists.
gcc/testsuite/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* gcc/testsuite/g++.dg/abi/mangle69.C: New test.
* gcc/testsuite/g++.dg/abi/mangle70.C: New test.
* gcc/testsuite/g++.dg/abi/mangle71.C: New test.
* gcc/testsuite/g++.dg/abi/mangle72.C: New test.
* gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class15.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class16.C: New test.
* gcc/testsuite/g++.dg/init/array51.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/abi/mangle69.C
trunk/gcc/testsuite/g++.dg/abi/mangle70.C
trunk/gcc/testsuite/g++.dg/abi/mangle71.C
trunk/gcc/testsuite/g++.dg/abi/mangle72.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class15.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class16.C
trunk/gcc/testsuite/g++.dg/init/array51.C
trunk/gcc/testsuite/g++.dg/template/nontype29.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/mangle.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/89878] same specializations on a zero-initialized struct object as a non-type parameter treated as distinct
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89878
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 23:10:23 2019
New Revision: 270155
URL: https://gcc.gnu.org/viewcvs?rev=270155&root=gcc&view=rev
Log:
PR c++/89974 - ICE on a definition of a non-type specialization on a struct
object with pointer to member function
PR c++/89878 - same specializations on a zero-initialized struct object as a
non-type parameter treated as distinct
PR c++/89833 - sorry, unimplemented: string literal in function template
signature
PR c++/47488 - sorry, unimplemented: string literal in function template
signature
gcc/cp/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* decl.c (reshape_init_array_1): Strip trailing zero-initializers
from arrays of trivial type and known size.
* mangle.c (write_expression): Convert braced initializer lists
to STRING_CSTs.
(write_expression): Trim trailing zero-initializers from arrays
of trivial type.
(write_template_arg_literal): Mangle strings the same as braced
initializer lists.
gcc/testsuite/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* gcc/testsuite/g++.dg/abi/mangle69.C: New test.
* gcc/testsuite/g++.dg/abi/mangle70.C: New test.
* gcc/testsuite/g++.dg/abi/mangle71.C: New test.
* gcc/testsuite/g++.dg/abi/mangle72.C: New test.
* gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class15.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class16.C: New test.
* gcc/testsuite/g++.dg/init/array51.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/abi/mangle69.C
trunk/gcc/testsuite/g++.dg/abi/mangle70.C
trunk/gcc/testsuite/g++.dg/abi/mangle71.C
trunk/gcc/testsuite/g++.dg/abi/mangle72.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class15.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class16.C
trunk/gcc/testsuite/g++.dg/init/array51.C
trunk/gcc/testsuite/g++.dg/template/nontype29.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/mangle.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/47488] sorry, unimplemented: string literal in function template signature
Date: Thu, 04 Apr 2019 23:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47488
--- Comment #15 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 4 23:10:23 2019
New Revision: 270155
URL: https://gcc.gnu.org/viewcvs?rev=270155&root=gcc&view=rev
Log:
PR c++/89974 - ICE on a definition of a non-type specialization on a struct
object with pointer to member function
PR c++/89878 - same specializations on a zero-initialized struct object as a
non-type parameter treated as distinct
PR c++/89833 - sorry, unimplemented: string literal in function template
signature
PR c++/47488 - sorry, unimplemented: string literal in function template
signature
gcc/cp/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* decl.c (reshape_init_array_1): Strip trailing zero-initializers
from arrays of trivial type and known size.
* mangle.c (write_expression): Convert braced initializer lists
to STRING_CSTs.
(write_expression): Trim trailing zero-initializers from arrays
of trivial type.
(write_template_arg_literal): Mangle strings the same as braced
initializer lists.
gcc/testsuite/ChangeLog:
PR c++/89974
PR c++/89878
PR c++/89833
PR c++/47488
* gcc/testsuite/g++.dg/abi/mangle69.C: New test.
* gcc/testsuite/g++.dg/abi/mangle70.C: New test.
* gcc/testsuite/g++.dg/abi/mangle71.C: New test.
* gcc/testsuite/g++.dg/abi/mangle72.C: New test.
* gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class15.C: New test.
* gcc/testsuite/g++.dg/cpp2a/nontype-class16.C: New test.
* gcc/testsuite/g++.dg/init/array51.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/abi/mangle69.C
trunk/gcc/testsuite/g++.dg/abi/mangle70.C
trunk/gcc/testsuite/g++.dg/abi/mangle71.C
trunk/gcc/testsuite/g++.dg/abi/mangle72.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-array19.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class15.C
trunk/gcc/testsuite/g++.dg/cpp2a/nontype-class16.C
trunk/gcc/testsuite/g++.dg/init/array51.C
trunk/gcc/testsuite/g++.dg/template/nontype29.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/mangle.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/89833] [9 Regression] sorry, unimplemented: string literal in function template signature
Date: Thu, 04 Apr 2019 23:11:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r270155.
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Subject: [Bug c++/47488] sorry, unimplemented: string literal in function template signature
Date: Thu, 04 Apr 2019 23:13:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
Known to fail| |4.6.0, 4.8.5, 4.9.4, 5.4.0,
| |6.4.0, 7.3.0, 8.3.0
--- Comment #16 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in GCC 9.
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Subject: [Bug c++/89974] ICE on a definition of a non-type specialization on a struct object with pointer to member function
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed via r270155.
>From gcc-bugs-return-639754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 23:16:18 2019
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Subject: [Bug c++/89878] same specializations on a zero-initialized struct object as a non-type parameter treated as distinct
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r270155.
>From gcc-bugs-return-639755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 04 23:21:07 2019
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Subject: [Bug c++/71487] sorry, unimplemented: mangling offset_ref
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2016-06-26 00:00:00 |2019-4-4
CC| |msebor at gcc dot gnu.org
Known to fail| |8.3.0, 9.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
No change in GCC 8 or 9:
pr71487.C: In instantiation of ‘void PropertyMatcher<F, T>::operator()(U) [with
U = std::__cxx11::basic_string<char>; F = long unsigned int
(std::__cxx11::basic_string<char>::*)() const; T = int]’:
pr71487.C:30:34: required from here
pr71487.C:15:39: warning: comparison of integer expressions of different
signedness: ‘long unsigned int’ and ‘int’ [-Wsign-compare]
15 | std::cout << ((actual.*memfun)() == expected) << std::endl;
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
pr71487.C: In instantiation of ‘decltype (Property((&
std::__cxx11::basic_string<char>::size), declval<T>())) HasLength(T) [with T =
int]’:
pr71487.C:31:1: required from here
pr71487.C:25:6: sorry, unimplemented: mangling offset_ref
25 | auto HasLength(T expected) -> decltype(Property(&std::string::size,
declval<T>())) {
| ^~~~~~~~~
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--- Comment #5 from Eyal Rozenberg <eyalroz at technion dot ac.il> ---
(In reply to Jan Hubicka from comment #3)
> The reason why we do not devirtualize is that only information about Aint is
> the type of function parameter
"Only"? :-)
> and we do not believe it implies the type of
> memory location it points to because there is no read or anything from that
> pointer before it is casted to struct A* and pointer of a given type does
> not need to necessarily point to memory location of the same type unless you
> dereference it.
>
> Is it really valid to devirtualize here?
IANALL, but yes. You're using terms like "belief" and talk about speculative
inference based on partial evidence. Why? foo_virtual gets a pointer to an
Aint. Why should the compiler needs to second-guess this?
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84382] add command-line options -std=gnu2003 and -std=gnu2008 for gfortran
Date: Thu, 04 Apr 2019 23:40:00 -0000
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kargl at gcc dot gnu.org changed:
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--- Comment #3 from kargl at gcc dot gnu.org ---
(In reply to janus from comment #2)
> (In reply to Dominique d'Humieres from comment #1)
> > Fortran is not C!
>
> True. Fortran is not C is not C++. The main difference wrt this PR is
> possibly that the latter two have a large enough user base, so that a
> significant amount of people actually use the options mentioned above.
>
How do you propose to enforce a certain standard and allow
GNU extensions? For example, -std=gnu2003 would enforce
Fortran 2003, but allow GNU extensions. The problem is that
gfortran allows several extensions that violate the
standard. A simple example is
program foo
integer :: i = z'1234'
print *, i
end program foo
% gfcx -o z a.f90 && ./z
4660
% gfcx -o z -std=f2003 a.f90 && ./z
a.f90:2:18:
2 | integer :: i = z'1234'
| 1
Error: GNU Extension: BOZ literal at (1) outside a DATA statement
and outside INT/REAL/DBLE/CMPLX
gfortran even allows extensions that aren't caught by the -std
options and are not document!
program foo
integer :: i = 42
print '(i0)', i + z'1234'
end program foo
%gfcx -o z a.f90 && ./z
4702
% gfcx -o z -std=f2003 a.f90 && ./z
4702
I think it will becomes a endless discussion on what should
and should not be covered under -std=gnu2003. What we have
now seems to be the most reasonable approach (with the
available man power to address problem). Either a user
wants GNU Fortran (ie., -std=gnu, the default behavior) or
a user wants a stricter adherence to a particular standard.
(For the record, I plan to remove both of the above extensions in 10.0).
> > WTF?
>
> Giving that questions back to you, Dominique: WTF? Which problem do you
> think you solve by closing PRs that have not been fixed?
Yeah, I saw Dominique's comment #1, and thought that it might
be a tad bit over-the-top given the quality and quantity of
your contributions to gfortran.
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Subject: [Bug fortran/79842] i18n: subword translation in "Can't use the same %smodule"
Date: Thu, 04 Apr 2019 23:45:00 -0000
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--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
Any progress on this one? To me it sounds like it were quite easy to fix.
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Subject: [Bug c++/89914] [9 Regression] ICE in nothrow_spec_p, at cp/except.c:1238
Date: Fri, 05 Apr 2019 00:06:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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CC|paolo.carlini at oracle dot com |
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--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
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Subject: [Bug c++/86986] [7/8/9 Regression] Unexpected errors for template parameter pack in a template template parameter
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 5 02:50:18 2019
New Revision: 270159
URL: https://gcc.gnu.org/viewcvs?rev=270159&root=gcc&view=rev
Log:
PR c++/86986 - ICE with TTP with parameter pack.
Three separate issues were breaking this testcase. One, we were trying to
look at the type of a template template parameter to see if it's a valid
non-type template parameter. Two, we were treating a parameter pack named
in the type of a template parameter pack of a TTP pack as being one of the
packs expanded by the outer pack. Three, we weren't supplying all the
necessary levels of template arguments when TTP matching.
* pt.c (coerce_template_parameter_pack): Only look at the type of a
non-type parameter pack.
(fixed_parameter_pack_p_1): Don't recurse into the type of a
non-type parameter pack.
(coerce_template_template_parms): Call add_outermost_template_args.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/variadic-ttp9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/86932] [8 Regression] Empty non-type template parameter pack not considered for SFINAE.
Date: Fri, 05 Apr 2019 02:51:00 -0000
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--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 5 02:50:52 2019
New Revision: 270160
URL: https://gcc.gnu.org/viewcvs?rev=270160&root=gcc&view=rev
Log:
PR c++/89966 - error with non-type auto tparm.
My patch for PR 86932 broke this testcase by passing tf_partial to
coerce_template_template_parms, which prevented do_auto_deduction from
actually replacing the auto.
* pt.c (do_auto_deduction): Clear tf_partial.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/nontype-auto15.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/89966] [9 Regression] non-type template argument rejects sizeof operator result
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 5 02:50:52 2019
New Revision: 270160
URL: https://gcc.gnu.org/viewcvs?rev=270160&root=gcc&view=rev
Log:
PR c++/89966 - error with non-type auto tparm.
My patch for PR 86932 broke this testcase by passing tf_partial to
coerce_template_template_parms, which prevented do_auto_deduction from
actually replacing the auto.
* pt.c (do_auto_deduction): Clear tf_partial.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/nontype-auto15.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/89948] [9 Regression] ICE in fold_convert_loc, at fold-const.c:2430
Date: Fri, 05 Apr 2019 02:52:00 -0000
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 5 02:52:23 2019
New Revision: 270161
URL: https://gcc.gnu.org/viewcvs?rev=270161&root=gcc&view=rev
Log:
PR c++/89948 - ICE with break in statement-expr.
* constexpr.c (cxx_eval_statement_list): Jumping out of a
statement-expr is non-constant.
Added:
trunk/gcc/testsuite/g++.dg/ext/stmtexpr23.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
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Subject: [Bug c++/89966] [9 Regression] non-type template argument rejects sizeof operator result
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89966
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-639765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 03:06:44 2019
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Subject: [Bug c++/89948] [9 Regression] ICE in fold_convert_loc, at fold-const.c:2430
Date: Fri, 05 Apr 2019 03:06:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-639766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 03:24:50 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89980] New: [9 Regression] bootstrap failed
Date: Fri, 05 Apr 2019 03:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89980
Bug ID: 89980
Summary: [9 Regression] bootstrap failed
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
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CC: msebor at gcc dot gnu.org
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Target: x86-64, i386
On x86, r270158 failed to bootstrap:
build/gengtype \
-S ../../src-trunk/gcc -I gtyp-input.list -w
tmp-gtype.statemake[6]: *** [Makefile:2642: s-gtype] Segmentation fault (core
dumped)
make[6]: *** Waiting for unfinished jobs....
../../src-trunk/gcc/fortran/gfortran.texi:2753: warning: @ref node name should
not contain `:'
rm fsf-funding.pod gcov.pod gfdl.pod gpl.pod cpp.pod gcc.pod gcov-dump.pod
gfortran.pod gcov-tool.pod
make[6]: Leaving directory '/export/gnu/import/git/gcc-test-ia32corei7/bld/gcc'
make[5]: *** [Makefile:4699: all-stage2-gcc] Error 2
make[5]: Leaving directory '/export/gnu/import/git/gcc-test-ia32corei7/bld'
make[4]: *** [Makefile:23216: stage2-bubble] Error 2
make[4]: Leaving directory '/export/gnu/import/git/gcc-test-ia32corei7/bld'
make[3]: *** [Makefile:23420: bootstrap] Error 2
r270151 is OK.
>From gcc-bugs-return-639767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 04:17:55 2019
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r270155.
>From gcc-bugs-return-639768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 05:24:54 2019
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From: "doko at debian dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/89981] New: [8/9 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
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Bug ID: 89981
Summary: [8/9 Regression] gfortran -pedantic rejects code in
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Created attachment 46091
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test case
works with r269936 on the gcc-8-branch, fails with r270110, and on the trunk:
$ gfortran -c -pedantic sadmvnt.f
sadmvnt.f:80:15:
INFORM = MVNNIT( N, CORREL, LOWER, UPPER, INFIN, INFIS, D, E )
1
Error: More actual than formal arguments in procedure call at (1)
sadmvnt.f:1432:15:
INFORM = MVTNIT( N, NU, CORREL, LOWER, UPPER, INFIN, INFIS, D, E )
1
Error: Type mismatch in argument 'w' at (1); passed INTEGER(4) to REAL(8)
>From gcc-bugs-return-639769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 06:24:55 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
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--- Comment #2 from rene.rahn@fu-berlin.de ---
Created attachment 46092
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reduced preprocessed source file
>From gcc-bugs-return-639770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 06:26:32 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Fri, 05 Apr 2019 06:26:00 -0000
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--- Comment #3 from rene.rahn@fu-berlin.de ---
Hi sorry,
it took me a while to provide the preprocessed source file. I have reduced it
with multidelta.
>From gcc-bugs-return-639771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 07:31:48 2019
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Subject: [Bug tree-optimization/89956] [9 Regression] ICE: Segmentation fault (in gsi_for_stmt(gimple*))
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--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Fri Apr 5 07:31:12 2019
New Revision: 270162
URL: https://gcc.gnu.org/viewcvs?rev=270162&root=gcc&view=rev
Log:
Make FMA code cope with redundant negates (PR89956)
This patch fixes a case in which, due to forced missed optimisations
in earlier passes, we have:
_1 = a * b
_2 = -_1
_3 = -_1
_4 = _2 + _3
and treated _4 as two FNMA candidates, once via _2 and once via _3.
2019-04-05 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/89956
* tree-ssa-math-opts.c (convert_mult_to_fma): Protect against
multiple negates of the same value.
gcc/testsuite/
PR tree-optimization/89956
* gfortran.dg/pr89956.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr89956.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-math-opts.c
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Subject: [Bug target/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-bisection |
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.4
Summary|[9 Regression] wrong code |[8/9 Regression] wrong code
|with -O -mtune=nano-x2 |with -O -mtune=nano-x2
|-fcaller-saves |-fcaller-saves
|-fexpensive-optimizations |-fexpensive-optimizations
|-fno-tree-dce -fno-tree-ter |-fno-tree-dce -fno-tree-ter
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r247410. Jakub, can you please take a look?
>From gcc-bugs-return-639773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 07:35:35 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/89582] Suboptimal code generated for floating point struct in -O3 compare to -O2
Date: Fri, 05 Apr 2019 07:35:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #5)
> Is this a dup of PR 59464?
The float case, yes. All of them are related, but different testcases
hit different details of the issue due to ABI details.
Maybe it would be good to create a separate meta-bug for these.
The installed patch doesn't help 59464.
>From gcc-bugs-return-639774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 07:41:11 2019
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Subject: [Bug tree-optimization/89956] [9 Regression] ICE: Segmentation fault (in gsi_for_stmt(gimple*))
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed
>From gcc-bugs-return-639775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 07:44:27 2019
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Subject: [Bug rtl-optimization/80960] [7/8/9 Regression] Huge memory use when compiling a very large test case
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--- Comment #18 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 4 Apr 2019, segher at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80960
>
> --- Comment #17 from Segher Boessenkool <segher at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #16)
>
> > Actually it already does two walks over the whole function in
> > combine_instructions it seems, so recording # insns per EBB should
> > be possible? (if that's really the key metric causing the issue)
>
> The average distance between a set and its first use is the key metric.
> The numbers make it feel like that is pretty constrained here still
> (I haven't run numbers on it), but 100 is very much already if there are
> 1M insns in the block (or whatever). All numbers that aren't terrible,
> but combines it takes up quite a chunk of time.
Hmm, so if we'd have numbered stmts in an EBB we could check the
distance between set and use and not combine when that gets too big?
> Combine also makes garbage for every try, and none of that is cleaned
> up during combine. Maybe we should change that? (I can try next week).
Not sure how easy that is but yes, it might help quite a bit due
to less churn on the cache. Just ggc_free()ing the "toplevel"
RTX of failed attempts might already help a bit. It's of course
kind-of a hack then but with an appropriate comment it would be
fine I guess (recursively ggc_free()ing might run into sharing
issues so that probably won't work).
>From gcc-bugs-return-639776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 07:47:49 2019
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Subject: [Bug middle-end/89922] Loop on fixed size array is not unrolled and poorly optimized at -O2
Date: Fri, 05 Apr 2019 07:47:00 -0000
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--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 4 Apr 2019, antoshkka at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89922
>
> --- Comment #2 from Antony Polukhin <antoshkka at gmail dot com> ---
> The estimation is very close to the actual result for the loop.
>
> But it does not take into the account the instructions before the loop that are
> eliminated due to unrolling. Some heuristic like "initializing the local
> variable with goes away for unrolled loops if the variable is rewritten in loop
> or if the variable is not used outside the loop"
Sure, but you'd need to collect some function-scope information to feed
such heuristics to not fall on the wrong-side if those constraints are
not met.
Was the testcase just an artificial one or does it appear (in this
isolated form!) in a real application/benchmark?
>From gcc-bugs-return-639777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 07:59:32 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #22 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to 康 çŠ from comment #21)
> All of the experiments were did in according to the build steps I just gave
> to you.
I'm sorry, but I would like to know whether you are talking about LTO builds
(w/ --enable-lto in configure) or not? You tried both, so I'm curious which
have you used?
>From gcc-bugs-return-639778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:17:40 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Nikolay Bogoychev from comment #10)
> (In reply to H.J. Lu from comment #9)
> > (In reply to Martin Liška from comment #8)
> > > Ok, let me first focus on the functional part of the patch.
> > > If I'm correct feature_list in get_builtin_code_for_version function should
> > > be basically aligned with isa_names_table in fold_builtin_cpu. Difference is
> > > following:
> > >
> > > +"avx5124fmaps"
> > > +"avx5124vnniw"
> > > +"avx512bitalg"
> > > +"avx512bw"
> > > +"avx512cd"
> > > +"avx512dq"
> > > +"avx512er"
> > > +"avx512ifma"
> > > +"avx512pf"
> > > +"avx512vbmi"
> > > +"avx512vbmi2"
> > > +"avx512vl"
> > > +"avx512vnni"
> > > +"avx512vpopcntdq"
> > > +"cmov"
> > > +"gfni"
> > > +"vpclmulqdq"
> > >
> > > Adding that should be possible, but one needs to define a priorities of
> > > these as seen here:
> > >
> > > ```
> > > /* Priority of i386 features, greater value is higher priority. This is
> > > used to decide the order in which function dispatch must happen. For
> > > instance, a version specialized for SSE4.2 should be checked for
> > > dispatch
> > > before a version for SSE3, as SSE4.2 implies SSE3. */
> > > enum feature_priority
> > > ```
> > >
> > > H.J. can you please help me with the priorities?
> >
> > What do we gain with these extra target attributes for function
> > multiversioning?
Agree with Nick, one should be able to have clones with specific AVX512
flavors.
I can prepare patch for it, only issues is the priority as I already mentioned.
>
> Hey,
>
> tl;dr We are able to target specific processors and not crash on Knight's
> Mill and Knight's landing.
>
> The problem is that AVX-512 has a 10000 subversions
> https://en.wikipedia.org/wiki/AVX-512#CPUs_with_AVX-512
>
> Some of them completely overlap (eg VL DQ and BW), however others are
> limited to specific processors. We are developing an application that uses a
> lot of intrinsics and we are targetting several different architectures. We
> rely on instructions that are included in AVX512BW and if we target the
> closest available working thing (AVX512F), we crash with illegal instruction
> on Knight's Landing and Knight's Mill processors (which should use the AVX2
> codepath instead).
>
> We are also about to add some VNNI code for upcoming Intel processors and we
> would need a function version for those, because AVX512F is too broad.
>
> Cheers,
>
> Nick
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Subject: [Bug c/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
CC| |marxin at gcc dot gnu.org,
| |mpolacek at gcc dot gnu.org
Known to work| |7.4.0
Target Milestone|--- |8.4
Ever confirmed|0 |1
Known to fail| |8.3.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r255066.
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Subject: [Bug preprocessor/89971] [8/9 Regression] ICE: unspellable token PADDING
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Known to work| |7.4.0
Target Milestone|--- |8.4
Ever confirmed|0 |1
Known to fail| |8.3.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r257696.
>From gcc-bugs-return-639780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:30:44 2019
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I'll try to isolate a test-case.
>From gcc-bugs-return-639782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:31:08 2019
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Subject: [Bug middle-end/89970] [8/9 Regression] ICE in dispatch_function_versions, at config/i386/i386.c:32347
Date: Fri, 05 Apr 2019 08:31:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |marxin at gcc dot gnu.org
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me fix that.
>From gcc-bugs-return-639783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:33:08 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #23 from 康 çŠ <kangshan0910 at hotmail dot com> ---
(In reply to Martin Liška from comment #22)
> (In reply to 康 çŠ from comment #21)
> > All of the experiments were did in according to the build steps I just gave
> > to you.
>
> I'm sorry, but I would like to know whether you are talking about LTO builds
> (w/ --enable-lto in configure) or not? You tried both, so I'm curious which
> have you used?
It is configured with "--enable-lto" and LDFLAGS="${LDFLAGS} -fno-lto", I'm not
sure whether lto takes effect or not. Do you need me remove "enable-lto" in
configure and try the experiments?
>From gcc-bugs-return-639784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:38:19 2019
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Subject: [Bug target/89935] [Arm] Return from interrupt on Cortex-R52 must use eret instruction
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Apr 5 08:37:44 2019
New Revision: 270163
URL: https://gcc.gnu.org/viewcvs?rev=270163&root=gcc&view=rev
Log:
Remove usage of apostrophes in error and warning messages (PR
translation/89935).
2019-04-05 Martin Liska <mliska@suse.cz>
PR translation/89935
* check-internal-format-escaping.py: Properly detect wrong
apostrophes.
2019-04-05 Martin Liska <mliska@suse.cz>
PR translation/89935
* collect-utils.c (collect_execute): Use %< and %>, or %qs in
order to wrap keywords or arguments.
* collect2.c (main): Likewise.
(scan_prog_file): Likewise.
(scan_libraries): Likewise.
* common/config/riscv/riscv-common.c
(riscv_subset_list::parsing_subset_version): Likewise.
(riscv_subset_list::parse_std_ext): Likewise.
* config/aarch64/aarch64.c (aarch64_override_options_internal):
Likewise.
* config/arm/arm.c (arm_option_override): Likewise.
* config/cris/cris.c (cris_print_operand): Likewise.
* config/darwin-c.c (darwin_pragma_options): Likewise.
(darwin_pragma_unused): Likewise.
(darwin_pragma_ms_struct): Likewise.
* config/ft32/ft32.c (ft32_print_operand): Likewise.
* config/i386/i386.c (print_reg): Likewise.
(ix86_print_operand): Likewise.
* config/i386/xm-djgpp.h: Likewise.
* config/iq2000/iq2000.c (iq2000_print_operand): Likewise.
* config/m32c/m32c.c (m32c_option_override): Likewise.
* config/msp430/msp430.c (msp430_option_override): Likewise.
* config/nds32/nds32.c (nds32_option_override): Likewise.
* config/nvptx/mkoffload.c (main): Likewise.
* config/rx/rx.c (rx_print_operand): Likewise.
(valid_psw_flag): Likewise.
* config/vms/vms-c.c (vms_pragma_member_alignment): Likewise.
(vms_pragma_nomember_alignment): Likewise.
(vms_pragma_extern_model): Likewise.
* lto-wrapper.c (compile_offload_image): Likewise.
* omp-offload.c (oacc_parse_default_dims): Likewise.
* symtab.c (symtab_node::verify_base): Likewise.
* tlink.c (recompile_files): Likewise.
(start_tweaking): Likewise.
* tree-profile.c (parse_profile_filter): Likewise.
2019-04-05 Martin Liska <mliska@suse.cz>
PR translation/89935
* objc-act.c (objc_add_property_declaration): Use %< and %>, or %qs in
order to wrap keywords or arguments.
(objc_add_synthesize_declaration_for_property): Likewise.
Modified:
trunk/contrib/ChangeLog
trunk/contrib/check-internal-format-escaping.py
trunk/gcc/ChangeLog
trunk/gcc/collect-utils.c
trunk/gcc/collect2.c
trunk/gcc/common/config/riscv/riscv-common.c
trunk/gcc/config/aarch64/aarch64.c
trunk/gcc/config/arm/arm.c
trunk/gcc/config/cris/cris.c
trunk/gcc/config/darwin-c.c
trunk/gcc/config/ft32/ft32.c
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/xm-djgpp.h
trunk/gcc/config/iq2000/iq2000.c
trunk/gcc/config/m32c/m32c.c
trunk/gcc/config/msp430/msp430.c
trunk/gcc/config/nds32/nds32.c
trunk/gcc/config/nvptx/mkoffload.c
trunk/gcc/config/rx/rx.c
trunk/gcc/config/vms/vms-c.c
trunk/gcc/lto-wrapper.c
trunk/gcc/objc/ChangeLog
trunk/gcc/objc/objc-act.c
trunk/gcc/omp-offload.c
trunk/gcc/symtab.c
trunk/gcc/tlink.c
trunk/gcc/tree-profile.c
>From gcc-bugs-return-639785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:38:42 2019
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
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----------------------------------------------------------------------------
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>From gcc-bugs-return-639787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:52:52 2019
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Subject: [Bug target/89945] [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
Known to work| |6.5.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-639786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:52:14 2019
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Subject: [Bug rtl-optimization/89944] [7/8/9 Regression] ICE in mark_jump_label_1, at jump.c:1152
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
Component|middle-end |rtl-optimization
Known to work| |4.3.6
Target Milestone|--- |7.5
Ever confirmed|0 |1
Known to fail| |4.8.5, 7.4.0, 8.3.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-639788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:53:34 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/89946] [8/9 Regression] ICE in assemble_start_function, at varasm.c:1871
Date: Fri, 05 Apr 2019 08:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |8.4
>From gcc-bugs-return-639789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:55:01 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/89950] attribute aligned ignored with attribute vector_size
Date: Fri, 05 Apr 2019 08:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Does it depend on the order of the aligned/vector_size attributes? I would
guess aligned after vector_size "works"?
>From gcc-bugs-return-639790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 08:58:06 2019
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Subject: [Bug c++/89962] likely/unlikely attributes don't work on a compound-statement
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Wouldn't call it wrong-code though ;)
>From gcc-bugs-return-639791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 09:02:32 2019
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Subject: [Bug target/89935] [Arm] Return from interrupt on Cortex-R52 must use eret instruction
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #1)
> Author: marxin
> Date: Fri Apr 5 08:37:44 2019
> New Revision: 270163
>
> URL: https://gcc.gnu.org/viewcvs?rev=270163&root=gcc&view=rev
> Log:
> Remove usage of apostrophes in error and warning messages (PR
> translation/89935).
>
> 2019-04-05 Martin Liska <mliska@suse.cz>
>
> PR translation/89935
> * check-internal-format-escaping.py: Properly detect wrong
> apostrophes.
> 2019-04-05 Martin Liska <mliska@suse.cz>
>
> PR translation/89935
> * collect-utils.c (collect_execute): Use %< and %>, or %qs in
> order to wrap keywords or arguments.
> * collect2.c (main): Likewise.
> (scan_prog_file): Likewise.
> (scan_libraries): Likewise.
> * common/config/riscv/riscv-common.c
> (riscv_subset_list::parsing_subset_version): Likewise.
> (riscv_subset_list::parse_std_ext): Likewise.
> * config/aarch64/aarch64.c (aarch64_override_options_internal): Likewise.
> * config/arm/arm.c (arm_option_override): Likewise.
> * config/cris/cris.c (cris_print_operand): Likewise.
> * config/darwin-c.c (darwin_pragma_options): Likewise.
> (darwin_pragma_unused): Likewise.
> (darwin_pragma_ms_struct): Likewise.
> * config/ft32/ft32.c (ft32_print_operand): Likewise.
> * config/i386/i386.c (print_reg): Likewise.
> (ix86_print_operand): Likewise.
> * config/i386/xm-djgpp.h: Likewise.
> * config/iq2000/iq2000.c (iq2000_print_operand): Likewise.
> * config/m32c/m32c.c (m32c_option_override): Likewise.
> * config/msp430/msp430.c (msp430_option_override): Likewise.
> * config/nds32/nds32.c (nds32_option_override): Likewise.
> * config/nvptx/mkoffload.c (main): Likewise.
> * config/rx/rx.c (rx_print_operand): Likewise.
> (valid_psw_flag): Likewise.
> * config/vms/vms-c.c (vms_pragma_member_alignment): Likewise.
> (vms_pragma_nomember_alignment): Likewise.
> (vms_pragma_extern_model): Likewise.
> * lto-wrapper.c (compile_offload_image): Likewise.
> * omp-offload.c (oacc_parse_default_dims): Likewise.
> * symtab.c (symtab_node::verify_base): Likewise.
> * tlink.c (recompile_files): Likewise.
> (start_tweaking): Likewise.
> * tree-profile.c (parse_profile_filter): Likewise.
> 2019-04-05 Martin Liska <mliska@suse.cz>
>
> PR translation/89935
> * objc-act.c (objc_add_property_declaration): Use %< and %>, or %qs in
> order to wrap keywords or arguments.
> (objc_add_synthesize_declaration_for_property): Likewise.
>
> Modified:
> trunk/contrib/ChangeLog
> trunk/contrib/check-internal-format-escaping.py
> trunk/gcc/ChangeLog
> trunk/gcc/collect-utils.c
> trunk/gcc/collect2.c
> trunk/gcc/common/config/riscv/riscv-common.c
> trunk/gcc/config/aarch64/aarch64.c
> trunk/gcc/config/arm/arm.c
> trunk/gcc/config/cris/cris.c
> trunk/gcc/config/darwin-c.c
> trunk/gcc/config/ft32/ft32.c
> trunk/gcc/config/i386/i386.c
> trunk/gcc/config/i386/xm-djgpp.h
> trunk/gcc/config/iq2000/iq2000.c
> trunk/gcc/config/m32c/m32c.c
> trunk/gcc/config/msp430/msp430.c
> trunk/gcc/config/nds32/nds32.c
> trunk/gcc/config/nvptx/mkoffload.c
> trunk/gcc/config/rx/rx.c
> trunk/gcc/config/vms/vms-c.c
> trunk/gcc/lto-wrapper.c
> trunk/gcc/objc/ChangeLog
> trunk/gcc/objc/objc-act.c
> trunk/gcc/omp-offload.c
> trunk/gcc/symtab.c
> trunk/gcc/tlink.c
> trunk/gcc/tree-profile.c
Sorry for wrong commit entry, itb elongs to PR89935.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
Date: Fri, 05 Apr 2019 09:05:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P1
Known to work| |8.3.0
Known to fail| |9.0
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
There's a reduced test-case:
$ cat test.C
static const char *const rtx_format[1] = { "" };
int main(int argc, char **argv)
{
if (rtx_format[0] == 0)
__builtin_abort ();
return 0;
}
$ g++ /tmp/test.C && ./a.out
Aborted (core dumped)
>From gcc-bugs-return-639792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 09:05:16 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/89936] wrong punctuation in tree-profile.c
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Apr 5 09:04:41 2019
New Revision: 270164
URL: https://gcc.gnu.org/viewcvs?rev=270164&root=gcc&view=rev
Log:
Fix ChangeLog entries.
contrib/ChangeLog:
2019-04-03 Martin Liska <mliska@suse.cz>
PR translation/89936
* check-internal-format-escaping.py: Properly detect wrong
apostrophes.
gcc/ChangeLog:
2019-04-03 Martin Liska <mliska@suse.cz>
PR translation/89936
* collect-utils.c (collect_execute): Use %< and %>, or %qs in
order to wrap keywords or arguments.
* collect2.c (main): Likewise.
(scan_prog_file): Likewise.
(scan_libraries): Likewise.
* common/config/riscv/riscv-common.c
(riscv_subset_list::parsing_subset_version): Likewise.
(riscv_subset_list::parse_std_ext): Likewise.
* config/aarch64/aarch64.c (aarch64_override_options_internal):
Likewise.
* config/arm/arm.c (arm_option_override): Likewise.
* config/cris/cris.c (cris_print_operand): Likewise.
* config/darwin-c.c (darwin_pragma_options): Likewise.
(darwin_pragma_unused): Likewise.
(darwin_pragma_ms_struct): Likewise.
* config/ft32/ft32.c (ft32_print_operand): Likewise.
* config/i386/i386.c (print_reg): Likewise.
(ix86_print_operand): Likewise.
* config/i386/xm-djgpp.h: Likewise.
* config/iq2000/iq2000.c (iq2000_print_operand): Likewise.
* config/m32c/m32c.c (m32c_option_override): Likewise.
* config/msp430/msp430.c (msp430_option_override): Likewise.
* config/nds32/nds32.c (nds32_option_override): Likewise.
* config/nvptx/mkoffload.c (main): Likewise.
* config/rx/rx.c (rx_print_operand): Likewise.
(valid_psw_flag): Likewise.
* config/vms/vms-c.c (vms_pragma_member_alignment): Likewise.
(vms_pragma_nomember_alignment): Likewise.
(vms_pragma_extern_model): Likewise.
* lto-wrapper.c (compile_offload_image): Likewise.
* omp-offload.c (oacc_parse_default_dims): Likewise.
* symtab.c (symtab_node::verify_base): Likewise.
* tlink.c (recompile_files): Likewise.
(start_tweaking): Likewise.
* tree-profile.c (parse_profile_filter): Likewise.
gcc/objc/ChangeLog:
2019-04-03 Martin Liska <mliska@suse.cz>
PR translation/89936
* objc-act.c (objc_add_property_declaration): Use %< and %>, or %qs in
order to wrap keywords or arguments.
(objc_add_synthesize_declaration_for_property): Likewise.
Modified:
trunk/contrib/ChangeLog
trunk/gcc/ChangeLog
trunk/gcc/objc/ChangeLog
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Subject: [Bug translation/89936] wrong punctuation in tree-profile.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk, not planning to backport.
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Subject: [Bug fortran/89981] [8/9 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
Date: Fri, 05 Apr 2019 09:12:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
CC| |marxin at gcc dot gnu.org
Target Milestone|--- |8.4
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r269895.
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Subject: [Bug tree-optimization/89963] [GRAPHITE] Compile-time hog when compiling gcc/testsuite/gcc.dg/autopar/uns-outer-6.c
Date: Fri, 05 Apr 2019 09:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
CC| |grosser at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org,
| |spop at gcc dot gnu.org
Summary|Compile-time hog when |[GRAPHITE] Compile-time hog
|compiling |when compiling
|gcc/testsuite/gcc.dg/autopa |gcc/testsuite/gcc.dg/autopa
|r/uns-outer-6.c |r/uns-outer-6.c
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. It looks like isl_ctx_set_max_operations doesn't properly
constrain it here :/
>From gcc-bugs-return-639797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 09:14:41 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Fri, 05 Apr 2019 09:14:00 -0000
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--- Comment #24 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to 康 çŠ from comment #23)
> (In reply to Martin Liška from comment #22)
> > (In reply to 康 çŠ from comment #21)
> > > All of the experiments were did in according to the build steps I just gave
> > > to you.
> >
> > I'm sorry, but I would like to know whether you are talking about LTO builds
> > (w/ --enable-lto in configure) or not? You tried both, so I'm curious which
> > have you used?
> It is configured with "--enable-lto" and LDFLAGS="${LDFLAGS} -fno-lto", I'm
> not sure whether lto takes effect or not. Do you need me remove "enable-lto"
> in configure and try the experiments?
Using "--enable-lto" and LDFLAGS="${LDFLAGS} -fno-lto" is wrong. It will use
LTO because one can't stop usage LTO bytecode by linker option. There's no
assembly that linked would be able to link.
>From gcc-bugs-return-639798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 09:15:35 2019
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Subject: [Bug target/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-639799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 09:16:58 2019
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Subject: [Bug c/89968] attribute packed fails to reduce char vector member alignment
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
vector_size needs to honor user-alignment I guess.
>From gcc-bugs-return-639800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 09:28:40 2019
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Subject: [Bug fortran/89981] [8/9 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
Date: Fri, 05 Apr 2019 09:28:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Without -pedantic I get the following warnings
sadmvnt.f:80:15:
80 | INFORM = MVNNIT( N, CORREL, LOWER, UPPER, INFIN, INFIS, D, E )
| 1
Warning: More actual than formal arguments in procedure call at (1)
sadmvnt.f:1432:15:
1432 | INFORM = MVTNIT( N, NU, CORREL, LOWER, UPPER, INFIN, INFIS, D, E
)
| 1
Warning: Type mismatch in argument 'w' at (1); passed INTEGER(4) to REAL(8)
[-Wargument-mismatch]
As documented -pedantic turns the warnings into errors.
The change occurred between revisions r269635 (2019-03-13, no warning) and
r269895 (2019-03-24, warnings), likely r269895 (pr78865) for trunk (9.0) and
r270032 for 8.3.1.
This seems related to the line 1505
ENTRY MVTNIT( N, NUIN, CORREL, LOWER, UPPER, INFIN, INFIS, D, E )
conflicting with the line 1468
DOUBLE PRECISION FUNCTION FNCMVT(N, W)
Note that the line 80 seems wrong: it should be the same as line 1432.
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Subject: [Bug target/89945] [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 46093
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46093&action=edit
Proposed patch
We allow SYMBOL_REF and LABEL_REF RTXes in x86_64_zext_immediate_operand for
certain code models. gen_lowpart doesn't know what to do with these references,
so we have to convert them from DImode to SImode by hand.
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Subject: [Bug tree-optimization/89963] [GRAPHITE] Compile-time hog when compiling gcc/testsuite/gcc.dg/autopar/uns-outer-6.c
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Actually it does - just compile-time isn't linear in the max operations :/
--param max-isl-operations compile-time
100000 0.36s
110000 2.62s
120000 5.35s
130000 15.57s
140000 30.16s
200000 138.96
IIRC I've "tuned" the default so we don't hit the timeout for SPEC 2006
(and that didn't cause any compile-time issues).
From looking at the source the number of operations are more related
to memory use (allocations trigger one "operations"), the only other
"operation" is isl_tab_pivot.
The time hog is finishing cut_to_integer_lexmin (which eventually calls
isl_tab_pivot multiple times). It seems that when isl_tab_pivot is
the driving hog the limit is too high but when it is allocation it works
well enough.
It looks like ISL should have two different limits, one for memory use
and one for time since they are not really comparable.
Also looks like (on this testcase at least) ISL-Imath is a lot slower
than ISL-gmp (by nearly a factor of 10!).
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #25 from 康 çŠ <kangshan0910 at hotmail dot com> ---
OK. Then I will remove "enable-lto" in configure and try "-O3" with
"-fno-strict-aliasing" to see whether it can solve the issue.
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Subject: [Bug preprocessor/89971] [8/9 Regression] ICE: unspellable token PADDING
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Subject: [Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-639806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:03:06 2019
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Subject: [Bug ipa/89975] Compile-time hog w/ large values of --param uninlined-function-insns
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think the param merely makes inlining a call cheaper (adds to the
function overhead when not inlined). So I would guess it causes more
inlining. But then the testcase is small so there does seem to be a
genuine bug in the inliner?
>From gcc-bugs-return-639807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:10:46 2019
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Subject: [Bug web/89964] Remove the "First, you must pick a product on which to enter a bug:" page
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, it seems like overkill to split them. I just want submitting GCC bugs
(which is more common by two orders of magnitude) to require fewer clicks.
>From gcc-bugs-return-639808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:15:39 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Fri, 05 Apr 2019 10:15:00 -0000
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--- Comment #26 from 康 çŠ <kangshan0910 at hotmail dot com> ---
I found the previous build log is like "g++ -o
/builddir/build/BUILD/node-v10.15.3/out/Release/cctest -pthread -rdynamic -m64
-Wl,--whole-archive,/builddir/build/BUILD/node-v10.15.3/out/Release/obj.target/deps/uv/libuv.a
-Wl,--no-whole-archive -Wl,-z,noexecstack -Wl,--whole-archive
/builddir/build/BUILD/node-v10.15.3/out/Release/obj.target/deps/v8/gypfiles/libv8_base.a
-Wl,--no-whole-archive -Wl,-z,relro -Wl,-z,now -Wl,-T
/builddir/build/BUILD/node-v10.15.3/src/large_pages/ld.implicit.script -pthread
-flto=4 -fuse-linker-plugin -ffat-lto-objects -fno-lto -Wl,--start-group
/builddir/build/BUILD/node-v10.15.3/out/Release/obj.target/cctest/test/cctest/node_test_fixture.o...",
you mean link options like "-flto=4 -ffat-lto-objects -fno-lto" are not
accurate and "-fno-lto" will not take effect, right?
>From gcc-bugs-return-639809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:17:31 2019
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Subject: [Bug tree-optimization/89499] [7/8/9 Regression] ICE in expand_UNIQUE, at internal-fn.c:2605
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--- Comment #5 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Created attachment 46094
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46094&action=edit
[WIP] [PR89499] CIF_OPENACC_ROUTINE_MISMATCH
(In reply to Thomas Schwinge from comment #4)
> Unless there is an OpenACC 'bind' clause involved (also 'nohost' clause?)
> (which are not yet implemented, so not relevant in this discussion), it is
> permissible (and worthwhile for the usual reasons) to inline such functions
> into one another, given proper nesting of OpenACC levels of parallelism.
> The latter is enforced by construction, by detecting improper caller/callee
> combinations (for example, trying to call a 'gang' routine from a 'vector'
> context).
>
> By construction, 'IFN_UNIQUE' etc. can only appear in 'oacc function'
> functions.
>
> There are 'oacc function' functions that do not contain 'IFN_UNIQUE' etc.
> (for example, 'seq' functions, such as math library functions), but which
> might still benefit from inlining.
And, in particular, also the C++ 'acc_on_device' forwarding function with
correctly typed argument. (See 'openacc.h'.)
> I suppose it is fine to do inlining if the outer function will then be
> handled by 'oaccdevlow'.
>
> And, I suppose it will be reasonable to forbid inlining of 'oacc function'
> functions into non-'oacc function' functions
..., and this breaks said 'acc_on_device' case... :-/
This is: the '#pragma acc routine' 'inline' function 'acc_on_device' is
regularely called from non-'#pragma acc routine' functions.
It becomes worse if the C++ forwarding function with correctly typed argument
is actually marked 'always_inline' -- as it probably should be?
So, this has to be permitted.
> because in that case you're
> not applying any OpenACC parallelism anyway, at least for a backportable ICE
> fix, then later possibly more logic added to allow that.
>
> That will probably be reasonably simple to implement; I'll give it some
> further thought, and testing.
Attaching my WIP patch for that, anyway.
But, as discussed, it seems that it'll have to be a bit more elaborate: do
allow such inlining after all. I'm still pondering how to best do that. (a)
Clean up the unexpected stuff at the place where it currently ICEs (by
refactoring stuff currently done in 'oaccdevlow'?). (b) When the problematic
inlining happens, tag the inlined-into function such that 'oaccdevlow' will
then clean it up in there. (c) Go as far as cloning the '#pragma acc routine'
functions early, so that the "host" function doesn't get the OpenACC magic
applied, but only the "OMP" one does. (If this has other benefits maybe, by
not cluttering the "hose" code with OpenACC magic?)
Option (b) would be something similar to what Jakub had suggested:
(In reply to Jakub Jelinek from comment #3)
> Or it is inlinable, but we need some cleanup, in that case perhaps have some
> cfun->* flag that would be initially set to whether the function has
> oacc_get_fn_attrib and would be ored into functions into which those
> functions were inlined, and then the oaccdevlower pass would clean that
> stuff up or whatever.
I think I'll look into that option first, try to locate the places where such
processing is to happen, and leave option (c) for later.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89979
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-05
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christoph Conrads from comment #1)
> There is no attachment with the preprocessed code demonstrating the problem
> because the this code is 1.2 MB large.
That's OK in this case as you code doesn't depend on anything except standard
library headers.
>From gcc-bugs-return-639811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:24:38 2019
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/84382] add command-line options -std=gnu2003 and -std=gnu2008 for gfortran
Date: Fri, 05 Apr 2019 10:24:00 -0000
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--- Comment #4 from janus at gcc dot gnu.org ---
(In reply to kargl from comment #3)
> How do you propose to enforce a certain standard and allow
> GNU extensions? For example, -std=gnu2003 would enforce
> Fortran 2003, but allow GNU extensions. The problem is that
> gfortran allows several extensions that violate the
> standard.
The idea is that -std=gnu2003 would allow 2003 features plus GNU extensions,
but reject any 2008 and 2018 features (like submodules and coarrays).
> gfortran even allows extensions that aren't caught by the -std
> options and are not document!
That's a separate issue and discussion, not related to this PR. Ideally all
extensions should be caught and documented, of course.
> I think it will becomes a endless discussion on what should
> and should not be covered under -std=gnu2003.
I don't see that. We already have a more-or-less complete classification of
what is a 2003 or 2008 feature and what is a non-std extension.
My proposal would simply introduce new options corresponding to different
combinations of feature classes.
> What we have
> now seems to be the most reasonable approach (with the
> available man power to address problem). Either a user
> wants GNU Fortran (ie., -std=gnu, the default behavior) or
> a user wants a stricter adherence to a particular standard.
I have not really thought about how to implement this PR. I assumed it would be
easy to modify/extend gfc_notify_std & friends to accomomdate some new feature
levels.
At some point I just had the idea for this PR and I wanted to write it down for
the future to think about and evaluate the idea. I haven't started an
implementation because it's not high priority for me.
If it's simply not needed or there is consensus that it's not worth the effort,
then I'm willing to discuss and possibly close this PR, but certainly not due
to someone yelling WTF.
Also I don't see what's wrong about letting it hang in bugzilla until it
becomes a priority/necessity for someone.
>From gcc-bugs-return-639812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:30:26 2019
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Subject: [Bug rtl-optimization/89944] [7/8/9 Regression] ICE in mark_jump_label_1, at jump.c:1152
Date: Fri, 05 Apr 2019 10:30:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
-- Built-in Function: void __builtin_longjmp (intptr_t *BUF, int VAL)
This function restores the stack context in BUF, saved by a
previous call to `__builtin_setjmp'. After `__builtin_longjmp' is
finished, the program resumes execution as if the matching
`__builtin_setjmp' returns the value VAL, which must be 1.
Because `__builtin_longjmp' depends on the function return
mechanism to restore the stack context, it cannot be called from
the same function calling `__builtin_setjmp' to initialize BUF.
It can only be called from a function called (directly or
indirectly) from the function calling `__builtin_setjmp'.
>From gcc-bugs-return-639813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:31:59 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #27 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to 康 çŠ from comment #26)
> I found the previous build log is like "g++ -o
> /builddir/build/BUILD/node-v10.15.3/out/Release/cctest -pthread -rdynamic
> -m64
> -Wl,--whole-archive,/builddir/build/BUILD/node-v10.15.3/out/Release/obj.
> target/deps/uv/libuv.a -Wl,--no-whole-archive -Wl,-z,noexecstack
> -Wl,--whole-archive
> /builddir/build/BUILD/node-v10.15.3/out/Release/obj.target/deps/v8/gypfiles/
> libv8_base.a -Wl,--no-whole-archive -Wl,-z,relro -Wl,-z,now -Wl,-T
> /builddir/build/BUILD/node-v10.15.3/src/large_pages/ld.implicit.script
> -pthread -flto=4 -fuse-linker-plugin -ffat-lto-objects -fno-lto
> -Wl,--start-group
> /builddir/build/BUILD/node-v10.15.3/out/Release/obj.target/cctest/test/
> cctest/node_test_fixture.o...", you mean link options like "-flto=4
> -ffat-lto-objects -fno-lto" are not accurate and "-fno-lto" will not take
> effect, right?
It will take effect, but you defined that only in LDFLAGS.
Anyway, please don't use --enable-lto with {LD,C,CXX}FLAGS="${LDFLAGS}
-fno-lto"!
>From gcc-bugs-return-639814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:32:02 2019
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Subject: [Bug fortran/89981] [8/9 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-639815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:32:38 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #9 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Wilco from comment #8)
> (In reply to Segher Boessenkool from comment #5)
> > The first one just needs an xfail. I don't know if it should be *-*-* there
> > or only arm*-*-* should be added.
> >
> > The other two need some debugging by someone who knows the target and/or
> > these tests.
>
> The previous code for Arm was:
>
> cbz r0, .L5
> push {r4, lr}
> mov r4, r0
> bl foo
> movw r2, #:lower16:.LANCHOR0
> movt r2, #:upper16:.LANCHOR0
> add r4, r4, r0
> str r4, [r2]
> pop {r4, pc}
> .L5:
> movs r0, #1
> bx lr
>
> Now it fails to shrinkwrap:
>
> push {r4, lr}
> mov r4, r0
> cmp r4, #0
> moveq r0, #1
> beq .L3
> bl foo
> ldr r2, .L7
> add r3, r4, r0
> str r3, [r2]
> .L3:
> pop {r4, lr}
> bx lr
>
> It seems shrinkwrapping is more random, sometimes it's done as expected,
> sometimes it is not. It was more consistent on older GCC's.
This looks like another fallout of not allowing combine to merge with hard
regs. Previously the CBZ could be moved outside of the prologue because it
operated directly on the incoming hard reg. Now it only sees the value after
the copy into the pseudo, which is a call-saved reg because it's live over the
call.
>From gcc-bugs-return-639816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:34:51 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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--- Comment #10 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
I wonder if this could be picked up in the post-reload CSE pass? (ie rewriting
the CBZ to use the incoming hard reg?)
>From gcc-bugs-return-639817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 10:49:28 2019
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Subject: [Bug fortran/55591] strict-aliasing & Fortran
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Ugh, this looks like a very bad idea. -fstrict-aliasing is very picky about
type punning and, the last time I looked, the Fortran front-end wasn't
particularly careful about it. Having a safe optimization mode wrt it is
generally helpful.
>From gcc-bugs-return-639818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 11:00:56 2019
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Subject: [Bug bootstrap/89982] New: [9 regression] SEGV in stage2 gengtype
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89982
Bug ID: 89982
Summary: [9 regression] SEGV in stage2 gengtype
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: i386-pc-solaris2.11, sparc-sun-solaris2.11,
x86_64-pc-linux-gnu, x86_64-apple-darwin11.4.2
Between 20190404 (r270144) and 20490405 (r270162), bootstrap started to fail
on many targets: during stage2 gengtype SEGVs:
build/gengtype \
-S /vol/gcc/src/hg/trunk/local/gcc -I gtyp-input.list -w
tmp-gtype.state
make[3]: *** [Makefile:2642: s-gtype] Segmentation Fault
On Linux/x86_64, I see
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7cf7cfa in __strlen_sse2 () from /lib64/libc.so.6
(gdb) where
#0 0x00007ffff7cf7cfa in __strlen_sse2 () from /lib64/libc.so.6
#1 0x00000000004076c5 in adjust_field_type(type*, options*) ()
#2 0x0000000000407c29 in create_field_at(pair*, type*, char const*, options*,
fileloc*) ()
#3 0x000000000040f379 in type(options**, bool) ()
#4 0x0000000000410137 in parse_file(char const*) ()
#5 0x000000000040416b in main ()
(gdb) up
#1 0x00000000004076c5 in adjust_field_type(type*, options*) ()
Starting a reghunt as we speak since the obvious candidate patch didn't cause
it.
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Subject: [Bug bootstrap/89982] [9 regression] SEGV in stage2 gengtype
Date: Fri, 05 Apr 2019 11:01:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-639820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 11:02:00 2019
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/89975] Compile-time hog w/ large values of --param uninlined-function-insns
Date: Fri, 05 Apr 2019 11:02:00 -0000
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--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Well, the parameter says that average function prologue+epilogue overhead is
200000 instructions. Inliner thus thinks it is very cool to deeply recursively
inline.
The resulting inline decision is pretty wide tree so the recursion depth limits
hits relatively late. Also the recursive inlining limit is applied by counting
of number of inlining of a function to itself, while here the tree has multiple
functions on it.
So I would say it is a consequence of instance value of
uninlined-function-insns.
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Subject: [Bug bootstrap/89982] [9 regression] SEGV in stage2 gengtype
Date: Fri, 05 Apr 2019 11:06:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-05
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr89980?
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |ro at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 89982 has been marked as a duplicate of this bug. ***
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Subject: [Bug bootstrap/89982] [9 regression] SEGV in stage2 gengtype
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 89980 ***
>From gcc-bugs-return-639824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 11:49:15 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/89983] New: Missing debug info for final loop IV value
Date: Fri, 05 Apr 2019 11:49:00 -0000
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Bug ID: 89983
Summary: Missing debug info for final loop IV value
Product: gcc
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For
void foo(int n)
{
if (n == 0)
return;
int i = 0;
do
{
++i;
}
while (i < n);
__asm__ volatile ("" : : "g" (i) : "memory");
}
int main() { foo(5); return 0; }
if you compile this with optimization but final-value replacement disabled
(-fno-tree-scev-cprop or simply when using -Og) gdb only prints
<optimized out> for i when breaking at the inline asm. It is actually
the 'ret' instruction that is associated with that line (and line
association in the loop is generally weird, with no assembly instruction
associated with the loop condition...).
.debug_loc shows
00000002 v000000000000000 v000000000000001 views at 00000000 for:
0000000000000009 0000000000000010 (DW_OP_reg0 (rax))
that's just for the add if I deciper correctly. The issue might be that
we have
<bb 3> [local count: 1073741824]:
# i_1 = PHI <[t.c:5:7] 0(2), [t.c:8:7] i_4(3)>
# DEBUG i => i_1
[t.c:6:3] # DEBUG BEGIN_STMT
[t.c:8:7] # DEBUG BEGIN_STMT
[t.c:8:7] i_4 = i_1 + 1;
[t.c:8:7] # DEBUG i => i_4
[t.c:10:3] if (n_3(D) > i_4)
goto <bb 3>; [89.00%]
else
goto <bb 4>; [11.00%]
<bb 4> [local count: 118111601]:
[t.c:11:3] # DEBUG BEGIN_STMT
[t.c:11:3] __asm__ __volatile__("" : : "g" i_4 : "memory");
thus refer to the value before and after the increment (but we have
only one instruction). Still there's the compare and branch to have
the new value (in same register) plus of course the ret.
Note the RTL seems to reflect things correctly at var-tracking time
but then var-tracking has
(note 41 21 42 (var_location i (nil)) NOTE_INSN_VAR_LOCATION)
(note 42 41 24 (var_location n (reg:SI 5 di [ n ])) NOTE_INSN_VAR_LOCATION)
between the asm and the simple-return. Somehow the asm itself has
a REG_DEAD note on ax (well, it's the last use). Using a nop in the
asm "fixes" the debug experience.
This will be gcc.dg/guality/loop-1.c (but with a nop).
The testcase as in the testsuite also fails at -O3 because of unknown reasons.
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Subject: [Bug debug/89892] gcc generates wrong debug information at -O2
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Apr 5 11:55:45 2019
New Revision: 270165
URL: https://gcc.gnu.org/viewcvs?rev=270165&root=gcc&view=rev
Log:
2019-04-05 Richard Biener <rguenther@suse.de>
PR debug/89892
PR debug/89905
* tree-cfgcleanup.c (remove_forwarder_block): Always move
debug bind stmts but reset them if they are not valid at the
destination.
* gcc.dg/guality/pr89892.c: New testcase.
* gcc.dg/guality/pr89905.c: Likewise.
* gcc.dg/guality/loop-1.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/guality/loop-1.c
trunk/gcc/testsuite/gcc.dg/guality/pr89892.c
trunk/gcc/testsuite/gcc.dg/guality/pr89905.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfgcleanup.c
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Subject: [Bug debug/89905] gcc generates wrong debug information at -Og
Date: Fri, 05 Apr 2019 11:56:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Apr 5 11:55:45 2019
New Revision: 270165
URL: https://gcc.gnu.org/viewcvs?rev=270165&root=gcc&view=rev
Log:
2019-04-05 Richard Biener <rguenther@suse.de>
PR debug/89892
PR debug/89905
* tree-cfgcleanup.c (remove_forwarder_block): Always move
debug bind stmts but reset them if they are not valid at the
destination.
* gcc.dg/guality/pr89892.c: New testcase.
* gcc.dg/guality/pr89905.c: Likewise.
* gcc.dg/guality/loop-1.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/guality/loop-1.c
trunk/gcc/testsuite/gcc.dg/guality/pr89892.c
trunk/gcc/testsuite/gcc.dg/guality/pr89905.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfgcleanup.c
>From gcc-bugs-return-639827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 12:38:02 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/89984] New: Extra register move
Date: Fri, 05 Apr 2019 12:38:00 -0000
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Bug ID: 89984
Summary: Extra register move
Product: gcc
Version: 9.0
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Target: x86-64,i386
[hjl@gnu-cfl-1 xxx]$ cat x.i
float
check_f_pos (float x, float y)
{
return x * __builtin_copysignf (1.0f, y);
}
[hjl@gnu-cfl-1 xxx]$ cat x.i
float
check_f_pos (float x, float y)
{
return x * __builtin_copysignf (1.0f, y);
}
[hjl@gnu-cfl-1 xxx]$ make
/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/ -mavx2
-O2 -S x.i
[hjl@gnu-cfl-1 xxx]$ cat x.s
.file "x.i"
.text
.p2align 4
.globl check_f_pos
.type check_f_pos, @function
check_f_pos:
.LFB0:
.cfi_startproc
vandps .LC0(%rip), %xmm1, %xmm1
vxorps %xmm0, %xmm1, %xmm1
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Why not just do
vxorps %xmm0, %xmm1, %xmm0
vmovaps %xmm1, %xmm0
ret
.cfi_endproc
.LFE0:
.size check_f_pos, .-check_f_pos
.section .rodata.cst16,"aM",@progbits,16
.align 16
.LC0:
.long 2147483648
.long 0
.long 0
.long 0
.ident "GCC: (GNU) 9.0.1 20190403 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 xxx]$
>From gcc-bugs-return-639828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 12:49:13 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Fri, 05 Apr 2019 12:49:00 -0000
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--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Liška from comment #11)
> Agree with Nick, one should be able to have clones with specific AVX512
> flavors.
> I can prepare patch for it, only issues is the priority as I already
> mentioned.
>
Priorities are used to choose processors for multi-versioned functions.
Please see how to use avx512XXX to distinguish:
const wide_int_bitmask PTA_SKYLAKE_AVX512 = PTA_SKYLAKE | PTA_AVX512F
const wide_int_bitmask PTA_CASCADELAKE = PTA_SKYLAKE_AVX512 | PTA_AVX512VNNI;
const wide_int_bitmask PTA_CANNONLAKE = PTA_SKYLAKE | PTA_AVX512F
const wide_int_bitmask PTA_ICELAKE_CLIENT = PTA_CANNONLAKE | PTA_AVX512VNNI
const wide_int_bitmask PTA_ICELAKE_SERVER = PTA_ICELAKE_CLIENT | PTA_PCONFIG
const wide_int_bitmask PTA_KNL = PTA_BROADWELL | PTA_AVX512PF | PTA_AVX512ER
const wide_int_bitmask PTA_KNM = PTA_KNL | PTA_AVX5124VNNIW
>From gcc-bugs-return-639829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 12:54:32 2019
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/89985] New: [9 Regression] Stray notes from OPT_Waddress_of_packed_member with -w
Date: Fri, 05 Apr 2019 12:54:00 -0000
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Bug ID: 89985
Summary: [9 Regression] Stray notes from
OPT_Waddress_of_packed_member with -w
Product: gcc
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Given the following source:
typedef unsigned char uint8_t;
typedef unsigned short int uint16_t;
typedef unsigned int uint32_t;
struct a {
uint8_t f0;
uint8_t f1;
uint16_t f2;
} __attribute__((packed));
struct b {
uint16_t f0;
};
void
test (struct a *p)
{
struct b *q= (struct b *)p;
}
when compiled with -w, gcc 9 emits just these stray notes:
rhbz1696441.c: In function ‘test’:
../../src/rhbz1696441.c:5:8: note: defined here
5 | struct a {
| ^
rhbz1696441.c:11:8: note: defined here
11 | struct b {
| ^
(from downstream report https://bugzilla.redhat.com/show_bug.cgi?id=1696441 )
The notes are followups to -Waddress-of-packed-member warnings, which aren't
being properly guarded by emission of that warning in c-family/c-warn.c:
2776 warning_at (location, OPT_Waddress_of_packed_member,
2777 "converting a packed %qT pointer (alignment
%d) "
2778 "to a %qT pointer (alignment %d) may result
in an "
2779 "unaligned pointer value",
2780 rhstype, rhs_align, type, type_align);
2781 tree decl = TYPE_STUB_DECL (rhstype);
2782 if (decl)
2783 inform (DECL_SOURCE_LOCATION (decl), "defined here");
2784 decl = TYPE_STUB_DECL (type);
2785 if (decl)
2786 inform (DECL_SOURCE_LOCATION (decl), "defined here");
which is normally guarded by:
2886 warn_for_address_or_pointer_of_packed_member (tree type, tree rhs)
2887 {
2888 if (!warn_address_of_packed_member)
2889 return;
but the "-w" sidesteps this (via diagnostic_report_warnings_p).
Appears to be new with gcc 9.
I'm working on a fix.
>From gcc-bugs-return-639830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 13:09:22 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
Date: Fri, 05 Apr 2019 13:09:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Cristian Morales Vega from comment #3)
> I have just took a look inside one of the intermediate format .gcov files
> and didn't see any "current_working_directory". There is a full path "file"
> variable though.
It's there since r266521.
>
> Not sure if that's what you mean. In any case anything inside the .gcov
> files would not solve my issue. My problem is that all the .gcov files are
> being created in the same directory and the .gcov files themselves get
> overwritten.
>
> So I have
>
> ./CMakeFiles/<cmake_target_name>.dir/src/error.cpp.o
> ./CMakeFiles/<cmake_target_name>.dir/src/error.cpp.gcda
> ./CMakeFiles/<cmake_target_name>.dir/src/error.cpp.gcno
> ./test/CMakeFiles/catch_tests.dir/error.cpp.o
> ./test/CMakeFiles/catch_tests.dir/error.cpp.gcda
> ./test/CMakeFiles/catch_tests.dir/error.cpp.gcno
>
>
> And a single "error.cpp.gcda.gcov" file since cmake has run
>
> /usr/bin/gcov -x -i -o <build_dir>/CMakeFiles/<cmake_target_name>.dir/src
> <build_dir>/CMakeFiles/cmake_target_name.dir/src/error.cpp.gcda
>
> and
>
> /usr/bin/gcov -x -i -o <build_dir>/test/CMakeFiles/catch_tests.dir
> <build_dir>/test/CMakeFiles/catch_tests.dir/error.cpp.gcda
>
> from the same directory, put all the files in a flat tarball and sent it to
> a CDash server. So I need the file names written to my hard drive to be
> different (i.e. -x to have effect).
My suggestion would be adding 'data_file' into a JSON report:
gcov -ti -l -s /tmp/auto -o /tmp/ main.gcda | python -m json.tool
/tmp/main.gcda:stamp mismatch with notes file
{
"current_working_directory": "/tmp",
"data_file": "main.gcda",
"files": [
{
"file": "auto/main.c",
"functions": [
{
"blocks": 8,
"blocks_executed": 0,
"demangled_name": "main",
"end_column": 1,
"end_line": 21,
"execution_count": 0,
"name": "main",
"start_column": 5,
"start_line": 6
}
],
"lines": [
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 6,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 8,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 10,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 12,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 15,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 17,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 18,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "main",
"line_number": 20,
"unexecuted_block": true
}
]
},
{
"file": "auto/foo.h",
"functions": [
{
"blocks": 2,
"blocks_executed": 0,
"demangled_name": "foo",
"end_column": 1,
"end_line": 4,
"execution_count": 0,
"name": "foo",
"start_column": 5,
"start_line": 1
}
],
"lines": [
{
"branches": [],
"count": 0,
"function_name": "foo",
"line_number": 1,
"unexecuted_block": true
},
{
"branches": [],
"count": 0,
"function_name": "foo",
"line_number": 3,
"unexecuted_block": true
}
]
}
],
"format_version": "1",
"gcc_version": "9.0.1 20190405 (experimental)"
}
Which should help you with uniq mapping now.
Patch candidate:
diff --git a/gcc/gcov.c b/gcc/gcov.c
index 1d576552a45..1fc37a07c34 100644
--- a/gcc/gcov.c
+++ b/gcc/gcov.c
@@ -1421,6 +1421,7 @@ generate_results (const char *file_name)
if (bbg_cwd != NULL)
root->set ("current_working_directory", new json::string (bbg_cwd));
+ root->set ("data_file", new json::string (file_name));
json::array *json_files = new json::array ();
root->set ("files", json_files);
>From gcc-bugs-return-639831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 13:49:09 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Fri, 05 Apr 2019 13:48:00 -0000
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--- Comment #28 from 康 çŠ <kangshan0910 at hotmail dot com> ---
(In reply to Martin Liška from comment #27)
> (In reply to 康 çŠ from comment #26)
> > I found the previous build log is like "g++ -o
> > /builddir/build/BUILD/node-v10.15.3/out/Release/cctest -pthread -rdynamic
> > -m64
> > -Wl,--whole-archive,/builddir/build/BUILD/node-v10.15.3/out/Release/obj.
> > target/deps/uv/libuv.a -Wl,--no-whole-archive -Wl,-z,noexecstack
> > -Wl,--whole-archive
> > /builddir/build/BUILD/node-v10.15.3/out/Release/obj.target/deps/v8/gypfiles/
> > libv8_base.a -Wl,--no-whole-archive -Wl,-z,relro -Wl,-z,now -Wl,-T
> > /builddir/build/BUILD/node-v10.15.3/src/large_pages/ld.implicit.script
> > -pthread -flto=4 -fuse-linker-plugin -ffat-lto-objects -fno-lto
> > -Wl,--start-group
> > /builddir/build/BUILD/node-v10.15.3/out/Release/obj.target/cctest/test/
> > cctest/node_test_fixture.o...", you mean link options like "-flto=4
> > -ffat-lto-objects -fno-lto" are not accurate and "-fno-lto" will not take
> > effect, right?
>
> It will take effect, but you defined that only in LDFLAGS.
> Anyway, please don't use --enable-lto with {LD,C,CXX}FLAGS="${LDFLAGS}
> -fno-lto"!
Thanks for your reminder. Currently I found there were 3 ways to solve the
issue.
1.Remove “enable-lto†in configure and open “fno-strict-aliasingâ€.
2.Add “__attribute__((noipa))†to the uv_unref(uv_handle_t*) function.
3.Add “__attribute__((noinline))†to the uv_unref(uv_handle_t*) function.
Maybe the first solution is a more reliable one in contrast to the other two
solutions. As solution 2 and 3 are more likely a workaround. Do you have any
suggestions?
>From gcc-bugs-return-639833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 13:49:49 2019
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Subject: [Bug libstdc++/89986] [9 Regression] missing export for directory_iterator::increment
Date: Fri, 05 Apr 2019 13:49:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-05
Version|unknown |9.0
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
>From gcc-bugs-return-639832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 13:49:30 2019
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Subject: [Bug libstdc++/89986] New: [9 Regression] missing export for directory_iterator::increment
Date: Fri, 05 Apr 2019 13:49:00 -0000
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Bug ID: 89986
Summary: [9 Regression] missing export for
directory_iterator::increment
Product: gcc
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#include <filesystem>
int main()
{
std::error_code ec;
std::filesystem::directory_iterator it("/", ec);
it.increment(ec);
}
Using GCC 8 and linking to libstdc++fs.a this works, but using GCC 9 it
doesn't:
/usr/bin/ld: /tmp/ccC5CJow.o: in function `main':
/tmp/dir.cc:7: undefined reference to
`std::filesystem::__cxx11::directory_iterator::increment(std::error_code&)'
collect2: error: ld returned 1 exit status
I forgot to export that symbol after moving the definitions to libstdc++.so
(and apparently never tested it!)
>From gcc-bugs-return-639834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 14:02:23 2019
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Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
Date: Fri, 05 Apr 2019 14:02:00 -0000
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--- Comment #5 from Cristian Morales Vega <christian.morales.vega at gmail dot com> ---
OK, trying to catch you here, from my gcc-8.3.1.
So with gcc 9 "--intermediate-format" is gone and we now have "--json-format"
(keeping the "-i" version)?
The "--intermediate-format" documentation used to say "can be used by lcov or
other tools". I guess the lcov devs know about this, but aren't the devs of
"other tools" going to be cross? I mean, I was suggesting to cmake to use
"--intermediate-format"
(https://gitlab.kitware.com/cmake/cmake/issues/19124#note_554428)... now they
would need to support two formats to be able to support different gcov
versions.
In any case I'm unsure how "current_working_directory" or "data_file" help with
the cmake case. The problem is that cmake is going to call gcov once and it's
going to create
/tmp/error.cpp.gcda.gcov.json.gz
with whatever contents, based on what
CMakeFiles/<cmake_target_name1>.dir/src/error.cpp.gcda says.
Then it's going to call gcov again, it's going to overwrite/destroy the
/tmp/error.cpp.gcda.gcov.json.gz file created one second ago, and in its place
is going to create a new
/tmp/error.cpp.gcda.gcov.json.gz
file based on what test/CMakeFiles/<cmake_target_name2>.dir/error.cpp.gcda
says.
So all the information contained on
CMakeFiles/<cmake_target_name1>.dir/src/error.cpp.gcda gets lost.
Sure, cmake could put the files in different directories to avoid overwriting
them, but it doesn't. And if cmake could do "-x -i" I would end up with two
files:
/tmp/error.cpp.gcda##3626990101906c77dbd16dea3f1aab07.gcov.json.gz
/tmp/error.cpp.gcda##39f7c940c3bc30bbedebd034d8c16a68.gcov.json.gz
and so no information would be lost.
>From gcc-bugs-return-639835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 14:14:43 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Fri, 05 Apr 2019 14:14:00 -0000
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--- Comment #29 from Martin Liška <marxin at gcc dot gnu.org> ---
> Thanks for your reminder. Currently I found there were 3 ways to solve the
> issue.
> 1.Remove “enable-lto†in configure and open “fno-strict-aliasingâ€.
> 2.Add “__attribute__((noipa))†to the uv_unref(uv_handle_t*) function.
> 3.Add “__attribute__((noinline))†to the uv_unref(uv_handle_t*) function.
> Maybe the first solution is a more reliable one in contrast to the other two
> solutions. As solution 2 and 3 are more likely a workaround. Do you have any
> suggestions?
It's always needed to use -fno-strict-aliasing as mentioned here:
https://github.com/nodejs/node/issues/27054
and the using --enable-lto should be fine.
>From gcc-bugs-return-639836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 14:18:55 2019
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Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Cristian Morales Vega from comment #5)
> OK, trying to catch you here, from my gcc-8.3.1.
> So with gcc 9 "--intermediate-format" is gone and we now have
> "--json-format" (keeping the "-i" version)?
>
> The "--intermediate-format" documentation used to say "can be used by lcov
> or other tools". I guess the lcov devs know about this, but aren't the devs
> of "other tools" going to be cross? I mean, I was suggesting to cmake to use
> "--intermediate-format"
> (https://gitlab.kitware.com/cmake/cmake/issues/19124#note_554428)... now
> they would need to support two formats to be able to support different gcov
> versions.
>
>
> In any case I'm unsure how "current_working_directory" or "data_file" help
> with the cmake case. The problem is that cmake is going to call gcov once
> and it's going to create
>
> /tmp/error.cpp.gcda.gcov.json.gz
>
> with whatever contents, based on what
> CMakeFiles/<cmake_target_name1>.dir/src/error.cpp.gcda says.
>
> Then it's going to call gcov again, it's going to overwrite/destroy the
> /tmp/error.cpp.gcda.gcov.json.gz file created one second ago, and in its
> place is going to create a new
>
> /tmp/error.cpp.gcda.gcov.json.gz
>
> file based on what test/CMakeFiles/<cmake_target_name2>.dir/error.cpp.gcda
> says.
>
> So all the information contained on
> CMakeFiles/<cmake_target_name1>.dir/src/error.cpp.gcda gets lost.
>
>
> Sure, cmake could put the files in different directories to avoid
Well, if cmake is overwriting the content, then it should be fixed on cmake
side.
> overwriting them, but it doesn't. And if cmake could do "-x -i" I would end
> up with two files:
>
> /tmp/error.cpp.gcda##3626990101906c77dbd16dea3f1aab07.gcov.json.gz
> /tmp/error.cpp.gcda##39f7c940c3bc30bbedebd034d8c16a68.gcov.json.gz
>
> and so no information would be lost.
This is a workaround and I don't like it much.
>From gcc-bugs-return-639837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 14:24:53 2019
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Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
Date: Fri, 05 Apr 2019 14:24:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
I take it base. Makes sense to behave exactly as for non-intermediate format
mode.
>From gcc-bugs-return-639838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 14:48:04 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Fri, 05 Apr 2019 14:48:00 -0000
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--- Comment #30 from 康 çŠ <kangshan0910 at hotmail dot com> ---
(In reply to Martin Liška from comment #29)
> > Thanks for your reminder. Currently I found there were 3 ways to solve the
> > issue.
> > 1.Remove “enable-lto†in configure and open “fno-strict-aliasingâ€.
> > 2.Add “__attribute__((noipa))†to the uv_unref(uv_handle_t*) function.
> > 3.Add “__attribute__((noinline))†to the uv_unref(uv_handle_t*) function.
> > Maybe the first solution is a more reliable one in contrast to the other two
> > solutions. As solution 2 and 3 are more likely a workaround. Do you have any
> > suggestions?
>
> It's always needed to use -fno-strict-aliasing as mentioned here:
> https://github.com/nodejs/node/issues/27054
>
> and the using --enable-lto should be fine.
But if using "--enable-lto" and "-fno-strict-aliasing", the issue cannot be
solved. In order to solve the issue, besides those options,
“__attribute__((noipa))†has to be added to the uv_unref(uv_handle_t*)
function. So you recommend this solution, right?
>From gcc-bugs-return-639839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 14:49:05 2019
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From: "srinath.parvathaneni at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: =?UTF-8?B?W0J1ZyBtaWRkbGUtZW5kLzg5OTg3XSBOZXc6IElDRSBvbiBHQ0MgdHJ1bmsg?= =?UTF-8?B?YW5kIEdDQyA4IG9uIGFybS1ub25lLWxpbnV4LWdudWVhYmloZiB0YXJnZXQg?= =?UTF-8?B?d2l0aCDigJwtTzHigJ0gb3B0aW9u?Date: Fri, 05 Apr 2019 14:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89987
Bug ID: 89987
Summary: ICE on GCC trunk and GCC 8 on arm-none-linux-gnueabihf
target with “-O1†option
Product: gcc
Version: 9.0
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ICE on GCC trunk and latest GCC 8 on arm-none-linux-gnueabihf with “-O1â€
option.
$cat test.f90
recursive subroutine e
k = transfer (transfer (e, e), 1)
end
$arm-none-linux-gnueabihf-gfortran test.f90 -O1 -S
during GIMPLE pass: ccp
../../test.f90:3:0:
3 | end
|
internal compiler error: in fold_convert_loc, at fold-const.c:2552
0x438231 fold_convert_loc(unsigned int, tree_node*, tree_node*)
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/fold-const.c:2552
0x78dfb5 evaluate_stmt
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:1997
0x78eea1 visit_assignment
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:2352
0x7f905b ssa_propagation_engine::simulate_stmt(gimple*)
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-propagate.c:230
0x7f927d ssa_propagation_engine::simulate_block(basic_block_def*)
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-propagate.c:337
0x7fa33b ssa_propagation_engine::ssa_propagate()
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-propagate.c:802
0x787197 do_ssa_ccp
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:2471
0x787197 execute
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:2515
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Subject: [Bug c++/89973] [9 Regression] ICE in check_address_or_pointer_of_packed_member, at c-family/c-warn.c:2769
Date: Fri, 05 Apr 2019 14:57:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Apr 5 14:56:53 2019
New Revision: 270166
URL: https://gcc.gnu.org/viewcvs?rev=270166&root=gcc&view=rev
Log:
PR c++/89973 - -Waddress-of-packed-member ICE with invalid conversion.
* c-warn.c (check_address_or_pointer_of_packed_member): Check the type
of RHS.
* g++.dg/warn/Waddress-of-packed-member2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/warn/Waddress-of-packed-member2.C
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-warn.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 14:59:25 2019
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Subject: [Bug c++/89973] [9 Regression] ICE in check_address_or_pointer_of_packed_member, at c-family/c-warn.c:2769
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-639842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 15:10:51 2019
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Subject: [Bug c/71598] Wrong optimization with aliasing enums
Date: Fri, 05 Apr 2019 15:10:00 -0000
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--- Comment #16 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Author: clyon
Date: Fri Apr 5 15:10:12 2019
New Revision: 270168
URL: https://gcc.gnu.org/viewcvs?rev=270168&root=gcc&view=rev
Log:
[testsuite] PR71598: Fix testcases again
2019-04-05 Christophe Lyon <christophe.lyon@linaro.org>
PR c/71598
* gcc.dg/torture/pr71598-1.c: dg-prune arm linker messages about
size of enums.
* gcc.dg/torture/pr71598-2.c: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr71598-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr71598-2.c
>From gcc-bugs-return-639843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 15:16:16 2019
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Subject: [Bug c/89985] [9 Regression] Stray notes from OPT_Waddress_of_packed_member with -w
Date: Fri, 05 Apr 2019 15:16:00 -0000
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--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Fri Apr 5 15:15:37 2019
New Revision: 270169
URL: https://gcc.gnu.org/viewcvs?rev=270169&root=gcc&view=rev
Log:
Guard notes for -Waddress-of-packed-member on warning emission (PR c/89985)
gcc/c-family/ChangeLog:
PR c/89985
* c-warn.c (check_address_or_pointer_of_packed_member): Add
auto_diagnostic_group. Guard inform calls by result of
warning_at call.
gcc/testsuite/ChangeLog:
PR c/89985
* c-c++-common/pr89985.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr89985.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-warn.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 15:22:50 2019
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Subject: [Bug c/89985] [9 Regression] Stray notes from OPT_Waddress_of_packed_member with -w
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Should be fixed by r270169.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
Date: Fri, 05 Apr 2019 16:18:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thanks for the small test case.
The affected x86 targets are presumably limited to i386. My x86_64 bootstrap
was successful.
>From gcc-bugs-return-639846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 16:20:57 2019
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Subject: [Bug fortran/55591] strict-aliasing & Fortran
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Testing the updated patch
The patch retested cleanly, but so far does not show a noticeable compilation
speed up (pr55585 being fixed since some time).
> Ugh, this looks like a very bad idea. -fstrict-aliasing is very picky
> about type punning and, the last time I looked, the Fortran front-end
> wasn't particularly careful about it. Having a safe optimization mode
> wrt it is generally helpful.
If there is no further feedback, I'll close the PR as WONTFIX.
>From gcc-bugs-return-639847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 16:25:05 2019
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Sebor from comment #5)
> Thanks for the small test case.
>
> The affected x86 targets are presumably limited to i386. My x86_64
> bootstrap was successful.
It also failed on x86-64 with
--prefix=/usr/9.0.1 --enable-clocale=gnu --with-system-zlib --enable-shared
--enable-cet --with-demangler-in-ld --with-fpmath=sse
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
Date: Fri, 05 Apr 2019 16:30:00 -0000
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--- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
It fails everywhere.
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Subject: [Bug other/89988] New: [9 regression] bootstrap build fails with segfault starting with r270155
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Bug ID: 89988
Summary: [9 regression] bootstrap build fails with segfault
starting with r270155
Product: gcc
Version: 9.0
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. . .
make[3]: Entering directory `/home/seurer/gcc/build/gcc-trunk-bootstrap/gcc'
build/gengtype \
-S /home/seurer/gcc/gcc-trunk-bootstrap/gcc -I
gtyp-input.list -w tmp-gtype.state
make[3]: *** [s-gtype] Segmentation fault
make[3]: Leaving directory `/home/seurer/gcc/build/gcc-trunk-bootstrap/gcc'
make[2]: *** [all-stage2-gcc] Error 2
. . .
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |seurer at gcc dot gnu.org
--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 89988 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-639850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 16:38:14 2019
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Subject: [Bug other/89988] [9 regression] bootstrap build fails with segfault starting with r270155
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Dup.
*** This bug has been marked as a duplicate of bug 89980 ***
>From gcc-bugs-return-639852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 16:54:47 2019
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch: https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00221.html
>From gcc-bugs-return-639854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 16:56:51 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Fri, 05 Apr 2019 16:56:00 -0000
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--- Comment #19 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Apr 5 16:56:09 2019
New Revision: 270170
URL: https://gcc.gnu.org/viewcvs?rev=270170&root=gcc&view=rev
Log:
PR libstdc++/87431 re-adjust never-valueless optimizations
Avoid creating arbitrarily large objects on the stack when emplacing
trivially copyable objects into a variant. Currently we provide the
strong exception-safety guarantee for all trivially copyable types, by
constructing a second variant and then doing a non-throwing move
assignment from the temporary. This patch restricts that behaviour to
trivially copyable types that are no larger than 256 bytes. For larger
types the object will be emplaced directly into the variant, and if its
initialization throws then the variant becomes valueless.
Also implement Antony Polukhin's suggestion to whitelist specific types
that are not trivially copyable but can be efficiently move-assigned.
Emplacing those types will never cause a variant to become valueless.
The whitelisted types are: std::shared_ptr, std::weak_ptr,
std::unique_ptr, std::function, and std::any. Additionally,
std::basic_string, std::vector, and __gnu_debug::vector are whitelisted
if their allocator traits give them a non-throwing move assignment
operator. Specifically, this means std::string is whitelisted, but
std::pmr::string is not.
As part of this patch, additional if-constexpr branches are added for
the cases where the initialization is known to be non-throwing (so the
overhead of the try-catch block can be avoided) and where a scalar is
being produced by a potentially-throwing conversion operator (so that
the overhead of constructing and move-assigning a variant is avoided).
These changes should have no semantic effect, just better codegen.
PR libstdc++/87431 (again)
* include/bits/basic_string.h (__variant::_Never_valueless_alt):
Define partial specialization for basic_string.
* include/bits/shared_ptr.h (_Never_valueless_alt): Likewise for
shared_ptr and weak_ptr.
* include/bits/std_function.h (_Never_valueless_alt): Likewise for
function.
* include/bits/stl_vector.h (_Never_valueless_alt): Likewise for
vector.
* include/bits/unique_ptr.h (_Never_valueless_alt): Likewise for
unique_ptr.
* include/debug/vector (_Never_valueless_alt): Likewise for debug
vector.
* include/std/any (_Never_valueless_alt): Define explicit
specialization for any.
* include/std/variant (_Never_valueless_alt): Define primary template.
(__never_valueless): Use _Never_valueless_alt instead of
is_trivially_copyable.
(variant::emplace<N>(Args&&...)): Add special case for non-throwing
initializations to avoid try-catch overhead. Add special case for
scalars produced by potentially-throwing conversions. Use
_Never_valueless_alt instead of is_trivially_copyable for the
remaining strong exception-safety cases.
(variant::emplace<N>(initializer_list<U>, Args&&...)): Likewise.
* testsuite/20_util/variant/87431.cc: Run both test functions.
* testsuite/20_util/variant/exception_safety.cc: New test.
* testsuite/20_util/variant/run.cc: Use pmr::string instead of string,
so the variant becomes valueless.
Added:
trunk/libstdc++-v3/testsuite/20_util/variant/exception_safety.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/basic_string.h
trunk/libstdc++-v3/include/bits/shared_ptr.h
trunk/libstdc++-v3/include/bits/std_function.h
trunk/libstdc++-v3/include/bits/stl_vector.h
trunk/libstdc++-v3/include/bits/unique_ptr.h
trunk/libstdc++-v3/include/debug/vector
trunk/libstdc++-v3/include/std/any
trunk/libstdc++-v3/include/std/variant
trunk/libstdc++-v3/testsuite/20_util/variant/87431.cc
trunk/libstdc++-v3/testsuite/20_util/variant/run.cc
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Subject: [Bug middle-end/89922] Loop on fixed size array is not unrolled and poorly optimized at -O2
Date: Fri, 05 Apr 2019 16:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89922
--- Comment #4 from Antony Polukhin <antoshkka at gmail dot com> ---
> Was the testcase just an artificial one or does it appear (in this
> isolated form!) in a real application/benchmark?
I was not investigating a particular benchmark or real world application at
first.
My guess is that heuristic will affect cryptography (initializing big arrays
with magic constants) and math (matrix multiplication with identity matrix for
example).
I've tried to check the validity of the guess. The very first attempt
succeeded. Hash computation for a constant string is not well optimized:
https://godbolt.org/z/iKi0pb The heuristic may notice that the string is a
local variable and may force the loop unrolling. Hash computations on a
constant variable is a common case in libstdc++ when working with unordered
maps and sets.
There's definitely some room for improvement for cases when a local variable is
used in the loop only.
>From gcc-bugs-return-639855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 16:57:09 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89986] [9 Regression] missing export for directory_iterator::increment
Date: Fri, 05 Apr 2019 16:57:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Apr 5 16:56:27 2019
New Revision: 270174
URL: https://gcc.gnu.org/viewcvs?rev=270174&root=gcc&view=rev
Log:
PR libstdc++/89986 export directory_iterator::increment
PR libstdc++/89986
* config/abi/pre/gnu.ver: Add missing exports.
* testsuite/27_io/filesystem/iterators/directory_iterator.cc: Test
increment member.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/config/abi/pre/gnu.ver
trunk/libstdc++-v3/testsuite/27_io/filesystem/iterators/directory_iterator.cc
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From: "barry.revzin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89989] New: missed devirtualization opportunity on final function
Date: Fri, 05 Apr 2019 17:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89989
Bug ID: 89989
Summary: missed devirtualization opportunity on final function
Product: gcc
Version: 9.0
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Example:
struct Base {
virtual int foo() { return 0; }
int bar() { return foo(); }
};
struct Derived : Base {
int foo() override final { return 1; }
};
int call_foo(Derived& d) { return d.foo(); }
int call_bar(Derived& d) { return d.bar(); }
For call_foo, the devirtualization happens:
call_foo(Derived&):
mov eax, 1
ret
For call_bar, gcc emits a branch to check whether 'd' is in fact a Derived:
call_bar(Derived&):
mov rax, QWORD PTR [rdi]
mov rax, QWORD PTR [rax]
cmp rax, OFFSET FLAT:Derived::foo()
jne .L6
mov eax, 1
ret
.L6:
jmp rax
But Derived::foo() is final, so there can't be any other valid behavior besides
simply returning 1.
Notably, if you add "int bar() { return foo(); }" to Derived as well, then
call_bar also just emits "mov eax, 1".
>From gcc-bugs-return-639857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 19:00:49 2019
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From: "dgilbert at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/89990] New: request warning: Use of out of bound compound initialised struct
Date: Fri, 05 Apr 2019 19:00:00 -0000
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Bug ID: 89990
Summary: request warning: Use of out of bound compound
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gcc version 9.0.1 20190312 (Red Hat 9.0.1-0.10) (GCC)
on Fedora 30, x86-64
We tripped over code like this in qemu which seems obvious enough that a
warning would be nice:
int foo(mytype *ptr)
{
if (!ptr) {
ptr = &(mytype) { };
}
if (ptr->p) ....
}
which worked OK on gcc 8, but seg'd on gcc 9 because ptr->p contained rubbish
since the compiler had noticed that the &() { }; went out of scope at the end
of the if.
So a warning would be nice if:
a) A pointer is initialised to point to an initialiser like that
b) That goes out of scope
c) The pointer is then unconditionally used.
The original qemu code is:
https://git.qemu.org/?p=qemu.git;a=blob;f=tests/libqos/qgraph.c;h=122efc1b7b8413bc69d81f2906c89f06eccd994a;hb=HEAD#l75
75 static void add_edge(const char *source, const char *dest,
76 QOSEdgeType type, QOSGraphEdgeOptions *opts)
77 {
78 char *key;
79 QOSGraphEdgeList *list = g_hash_table_lookup(edge_table, source);
80
81 if (!list) {
82 list = g_new0(QOSGraphEdgeList, 1);
83 key = g_strdup(source);
84 g_hash_table_insert(edge_table, key, list);
85 }
86
87 if (!opts) {
88 opts = &(QOSGraphEdgeOptions) { };
89 }
90
91 QOSGraphEdge *edge = g_new0(QOSGraphEdge, 1);
92 edge->type = type;
93 edge->dest = g_strdup(dest);
94 edge->edge_name = g_strdup(opts->edge_name ?: dest);
95 edge->arg = g_memdup(opts->arg, opts->size_arg);
>From gcc-bugs-return-639858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 19:11:19 2019
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Subject: [Bug c/89990] request warning: Use of out of bound compound initialised struct
Date: Fri, 05 Apr 2019 19:11:00 -0000
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--- Comment #1 from Eric Blake <eblake at redhat dot com> ---
Other references to compound initializers going out of scope and causing
problems:
https://stackoverflow.com/questions/47691857/lifetime-of-a-compound-literal
https://wiki.sei.cmu.edu/confluence/display/c/DCL21-C.+Understand+the+storage+of+compound+literals
Having the compiler flag the programmer's use of undefined behavior, especially
where the use-after-free SEEMS to work because an earlier version of the
compiler deferred cleanup of the stack space until the function exited (even
though it was entitled to do so as soon as the conditional's scope ended),
would be handy.
>From gcc-bugs-return-639859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 19:11:35 2019
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Subject: [Bug c/89990] request warning: Use of out of bound compound initialised struct
Date: Fri, 05 Apr 2019 19:11:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/gcc-9/porting_to.html
-fsantizier=address is able to find these uses after escaping the scope.
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From: "tom at honermann dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89923] printf format check and char8_t
Date: Fri, 05 Apr 2019 19:16:00 -0000
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--- Comment #4 from Tom Honermann <tom at honermann dot net> ---
(In reply to Florian Weimer from comment #3)
> But the precedent with wchar_t is that the type of the format string
> determines the type of the %s arguments. I'm not sure if that's a good
> precedent, but it's what we have today.
That matches Microsoft's documented behavior
(https://docs.microsoft.com/en-us/cpp/c-runtime-library/format-specification-syntax-printf-and-wprintf-functions?view=vs-2019),
but it runs contrary to the C standard (C11 7.29.2.1) and glibc behavior.
To be clear, the position I'm suggesting is that we add support for something
like these:
printf("%U8s", u8"text");
printf("%U8c", u8'x');
wprintf(L"%U8s", u8"text");
wprintf(L"%U8c", u8'x');
printf("%U16s", u"text");
printf("%U16c", u'x');
wprintf(L"%U16s", u"text");
wprintf(L"%U16c", u'x');
printf("%U32s", U"text");
printf("%U32c", U'x');
wprintf(L"%U32s", U"text");
wprintf(L"%U32c", U'x');
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From: "tkoenig at netcologne dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/55591] strict-aliasing & Fortran
Date: Fri, 05 Apr 2019 19:16:00 -0000
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--- Comment #11 from tkoenig at netcologne dot de <tkoenig at netcologne dot de> ---
Am 05.04.19 um 18:20 schrieb dominiq at lps dot ens.fr:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55591
>
> --- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
>> Testing the updated patch
>
> The patch retested cleanly, but so far does not show a noticeable compilation
> speed up (pr55585 being fixed since some time).
>
>> Ugh, this looks like a very bad idea. -fstrict-aliasing is very picky
>> about type punning and, the last time I looked, the Fortran front-end
>> wasn't particularly careful about it. Having a safe optimization mode
>> wrt it is generally helpful.
>
> If there is no further feedback, I'll close the PR as WONTFIX.
It might actually make more sense to set the default to "no"
(if that isn't already happening by default, I haven't checked).
>From gcc-bugs-return-639862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 19:17:12 2019
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Subject: [Bug c/89990] request warning: Use of out of scope compound literals
Date: Fri, 05 Apr 2019 19:17:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on| |88058
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
PR 88058.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88058
[Bug 88058] gcc fails to detect use of out of scope variable ?
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Subject: [Bug fortran/89981] [8/9 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
Date: Fri, 05 Apr 2019 19:21:00 -0000
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Reduced test case:
program main
call bar(i)
end program main
subroutine foo
entry bar(i)
end subroutine foo
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Subject: [Bug libstdc++/89991] New: Complex numbers: Calculation of imaginary part is not correct
Date: Fri, 05 Apr 2019 19:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
Bug ID: 89991
Summary: Complex numbers: Calculation of imaginary part is not
correct
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: t.sprodowski at web dot de
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Following calculation of the complex number leads to a wrong imaginary part:
#include <complex>
#include <iomanip>
#include <iostream>
int main(int argc, char *argv[])
{
std::complex<double> val = std::complex<double>(-1.8425031517782417e-07,
-0.0);
std::complex<double> testExp = std::pow(val, 0.5);
std::cout << "textExp: " << std::setprecision(30) << testExp << std::endl;
return 0;
}
Result is:
(2.6283607659835830609796003783e-20,-0.000429243887758258178214548772544), but
it should be
(2.628360765983583e-20, 0.0004292438877582582), obtained from Visual Studio,
MATLAB and Octave.
Compilation was done with gnu 8.2.0 and 7.3.0 on Ubuntu 18.04:
g++ -c -pipe -g -std=gnu++1y -Wall -W -D_REENTRANT -fPIC
-DQT_DEPRECATED_WARNINGS -DQT_QML_DEBUG -DQT_CORE_LIB -I../testPrecision -I.
-isystem /usr/include/x86_64-linux-gnu/qt5 -isystem
/usr/include/x86_64-linux-gnu/qt5/QtCore -I.
-I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++ -o main.o
../testPrecision/main.cpp
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #1 from t.sprodowski at web dot de ---
Created attachment 46095
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46095&action=edit
Source file
Source file to illustrate this bug.
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Subject: [Bug c++/89980] [9 Regression] pointer initialization with empty string folded to zero
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Component|bootstrap |c++
Resolution|--- |FIXED
Summary|[9 Regression] bootstrap |[9 Regression] pointer
|failed |initialization with empty
| |string folded to zero
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r270177.
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Subject: [Bug bootstrap/89980] [9 Regression] bootstrap failed
Date: Fri, 05 Apr 2019 19:50:00 -0000
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 5 19:49:38 2019
New Revision: 270177
URL: https://gcc.gnu.org/viewcvs?rev=270177&root=gcc&view=rev
Log:
PR bootstrap/89980 - pointer initialization with empty string folded to zero
gcc/cp/ChangeLog:
PR bootstrap/89980
* decl.c (reshape_init_array_1): Avoid treating empty strings
as zeros in array initializers.
Use trivial_type_p () instead of TYPE_HAS_TRIVIAL_DFLT().
gcc/testsuite/ChangeLog:
PR bootstrap/89980
* g++.dg/init/array52.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/init/array52.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/89925] [9 Regression] Wrong array bounds from ALLOCATE with SOURCE or MOLD
Date: Fri, 05 Apr 2019 20:42:00 -0000
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--- Comment #2 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Right, when I said it failed on 8, I had misunderstood my colleague; he had
only tried 9.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87145] [7/8/9 Regression] Implicit conversion to scoped enum fails: "error: taking address of temporary/rvalue"
Date: Fri, 05 Apr 2019 21:23:00 -0000
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--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Apr 5 21:22:40 2019
New Revision: 270178
URL: https://gcc.gnu.org/viewcvs?rev=270178&root=gcc&view=rev
Log:
PR c++/87145 - bogus error converting class type in template arg list.
* pt.c (convert_nontype_argument): Don't call
build_converted_constant_expr if it could involve calling a conversion
function with a instantiation-dependent constructor as its argument.
* g++.dg/cpp0x/constexpr-conv3.C: New test.
* g++.dg/cpp0x/constexpr-conv4.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-conv3.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-conv4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87145] [7/8 Regression] Implicit conversion to scoped enum fails: "error: taking address of temporary/rvalue"
Date: Fri, 05 Apr 2019 21:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87145
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] Implicit |[7/8 Regression] Implicit
|conversion to scoped enum |conversion to scoped enum
|fails: "error: taking |fails: "error: taking
|address of |address of
|temporary/rvalue" |temporary/rvalue"
--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-639871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 21:55:09 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/89992] New: Vectorizer is very sensitive to function calls
Date: Fri, 05 Apr 2019 21:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89992
Bug ID: 89992
Summary: Vectorizer is very sensitive to function calls
Product: gcc
Version: 9.0
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[hjl@gnu-cfl-1 xxx]$ cat x.c
static __inline unsigned int
__get_cpuid_max (unsigned int __ext, unsigned int *__sig)
{
unsigned int __eax, __ebx, __ecx, __edx;
__asm__ ("cpuid\n\t" : "=a" (__eax), "=b" (__ebx), "=c" (__ecx), "=d" (__edx)
: "0" (__ext));
if (__sig)
*__sig = __ebx;
return __eax;
}
static __inline int
__get_cpuid_count (unsigned int __leaf, unsigned int __subleaf,
unsigned int *__eax, unsigned int *__ebx,
unsigned int *__ecx, unsigned int *__edx)
{
unsigned int __ext = __leaf & 0x80000000;
unsigned int __maxlevel = __get_cpuid_max (__ext, 0);
if (__maxlevel == 0 || __maxlevel < __leaf)
return 0;
__asm__ ("cpuid\n\t" : "=a" (*__eax), "=b" (*__ebx), "=c" (*__ecx), "=d"
(*__edx) : "0" (__leaf), "2" (__subleaf));
return 1;
}
static int
avx512f_os_support (void)
{
unsigned int eax, edx;
unsigned int ecx = 0x0;
unsigned int mask = 0x2 | 0x4 | 0x20 | 0x40 | 0x80;
__asm__ ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (ecx));
return ((eax & mask) == mask);
}
int foo (void);
extern void abort (void);
static void do_test (void);
int
main ()
{
unsigned int eax, ebx, ecx, edx;
#ifndef WORK
if (!__get_cpuid_count (7, 0, &eax, &ebx, &ecx, &edx))
return 0;
#endif
if (foo () && avx512f_os_support ())
{
do_test ();
return 0;
}
return 0;
}
float a[16] = {-0.1f, -3.2f, -6.3f, -9.4f,
-12.5f, -15.6f, -18.7f, -21.8f,
24.9f, 27.1f, 30.2f, 33.3f,
36.4f, 39.5f, 42.6f, 45.7f};
float b[16] = {-1.2f, 3.4f, -5.6f, 7.8f,
-9.0f, 1.0f, -2.0f, 3.0f,
-4.0f, -5.0f, 6.0f, 7.0f,
-8.0f, -9.0f, 10.0f, 11.0f};
float r[16];
static void
do_test (void)
{
int i;
for (i = 0; i < 16; i++)
r[i] = a[i] * __builtin_copysignf (1.0f, b[i]);
for (i = 0; i < 16; i++)
if (r[i] != a[i] * __builtin_copysignf (1.0f, b[i]))
abort ();
}
[hjl@gnu-cfl-1 xxx]$ make
/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/ -mavx512f
-mavx512vl -O2 -ftree-vectorize -fdump-tree-vect-details -S x.c
[hjl@gnu-cfl-1 xxx]$ grep vectorized x.c.158t.vect
x.c:45:1: note: vectorized 0 loops in function.
[hjl@gnu-cfl-1 xxx]$
/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/ -mavx512f
-mavx512vl -O2 -ftree-vectorize -fdump-tree-vect-details -S x.c -DWORK
[hjl@gnu-cfl-1 xxx]$ grep vectorized x.c.158t.vect
x.c:83:10: missed: not vectorized: control flow in loop.
x.c:79:3: note: === vect_mark_stmts_to_be_vectorized ===
x.c:79:3: optimized: loop vectorized using 64 byte vectors
x.c:45:1: note: vectorized 1 loops in function.
[hjl@gnu-cfl-1 xxx]$
Vectorizer doesn't kick in when there are a couple function calls.
>From gcc-bugs-return-639872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 21:58:26 2019
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
Date: Fri, 05 Apr 2019 21:58:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at kernel dot crashing.org
--- Comment #39 from Jeffrey A. Law <law at redhat dot com> ---
One option here is to actually throttle back combining for stuff like this
(ud_dce dump):
(insn 2 4 3 2 (set (reg/v:DI 92 [ a ])
(reg:DI 0 x0 [ a ])) "j.c":18:1 47 {*movdi_aarch64}
(expr_list:REG_DEAD (reg:DI 0 x0 [ a ])
(nil)))
(note 3 2 6 2 NOTE_INSN_FUNCTION_BEG)
(insn 6 3 7 2 (set (reg:DI 93)
(const_int 3 [0x3])) "j.c":21:10 47 {*movdi_aarch64}
(nil))
(insn 7 6 13 2 (set (zero_extract:DI (reg/v:DI 92 [ a ])
(const_int 8 [0x8])
(const_int 0 [0]))
(reg:DI 93)) "j.c":21:10 764 {*insv_regdi}
(expr_list:REG_DEAD (reg:DI 93)
(nil)))
(insn 13 7 14 2 (set (reg/i:DI 0 x0)
(reg/v:DI 92 [ a ])) "j.c":22:1 47 {*movdi_aarch64}
(expr_list:REG_DEAD (reg/v:DI 92 [ a ])
(nil)))
We've actually got an RMW insn when combine starts. But...
Trying 17, 7 -> 13:
17: r92:DI=r95:DI
REG_DEAD r95:DI
7: zero_extract(r92:DI,0x8,0)=r93:DI
REG_DEAD r93:DI
13: x0:DI=r92:DI
REG_DEAD r92:DI
Failed to match this instruction:
(set (reg/i:DI 0 x0)
(ior:DI (and:DI (reg:DI 95)
(const_int -256 [0xffffffffffffff00]))
(reg:DI 93)))
We've torn the damn thing apart via expand_field_assignment. Worse yet, that
naturally splits and results in:
Successfully matched this instruction:
(set (reg/v:DI 92 [ a ])
(and:DI (reg:DI 95)
(const_int -256 [0xffffffffffffff00])))
Successfully matched this instruction:
(set (reg/i:DI 0 x0)
(ior:DI (reg/v:DI 92 [ a ])
(reg:DI 93)))
allowing combination of insns 17, 7 and 13
original costs 4 + 4 + 4 = 12
replacement costs 4 + 4 = 8
So we think the split is cheaper. And at this point we've lost. We won't do
further combinations into the second insn (destination is a hard reg and source
isn't a reg). Costing could clearly be improved here. Two copies and a zero
extract are cheaper than two logicals -- largely because the copies often go
away. But we can't know that at this point.
We could throttle attempts to combine into insn 13 if the source is not a
register and that was moderately successful. But it seems to me like we're
better off making try_combine smarter.
It's not hard at all to see something like
(set (reg/i:DI 0 x0)
(ior:DI (and:DI (reg:DI 95)
(const_int -256 [0xffffffffffffff00]))
(reg:DI 93)))
And realize that with a copy we can turn this into a RMW. In the case where
the destination is a hard register we can do something like this
(set (reg 95) (ior (and (reg 95) ...)))
(set (reg 0) (reg 95))
Of course that assumes reg95 dies, but that's easy enough to check. And that
has a good shot at being identified as a bitfield insertion.
Another example:
(set (reg 92))
(ior:DI (and:DI (reg 0)
(const_int -256 [0xffffffffffffff00]))
(reg:DI 93)))
I'm not sure this happens anymore, but it can be addressed in a similar way,
but with a copy before the insn, so
(set (reg 92) (reg 0))
(set (reg 92) (ior (and (reg 92) ...)))
Which again can often be identified as a bitfield insertion.
The all pseudo case can be handled with similar transformations.
This is actually pretty easy to wire into try_combine (rather than
make_field_assignment) just before we do splitting. If we wanted to be really
thorough, we can look at make_field_assignment and create a routine that
handles all the cases found there.
So we identify the cases we want to handle, use subst to make the change so
that it looks like an RMW (subst eventually calls make_field_assignment).
Assuming recognition succeeds, then we emit the copy before/after I3 and let
normal processing continue. If recognition fails we can undo_all and return.
That also seems to handle the combine_bfi regression (though I haven't tested
on Steve's more thorough tests).
It doesn't handle the lsl_ar_sbfix case, but AFAICT that was failing at 265398
as well.
Note this doesn't require major surgery in make_field_extraction or its friends
which is kind of nice given the way they're called out of subst.
Thoughts?
>From gcc-bugs-return-639873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 22:54:45 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89981] [8/9 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
Date: Fri, 05 Apr 2019 22:54:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
>From gcc-bugs-return-639874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 23:15:44 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84382] add command-line options -std=gnu2003 and -std=gnu2008 for gfortran
Date: Fri, 05 Apr 2019 23:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84382
--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Apr 05, 2019 at 10:24:15AM +0000, janus at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84382
>
> --- Comment #4 from janus at gcc dot gnu.org ---
> (In reply to kargl from comment #3)
> > How do you propose to enforce a certain standard and allow
> > GNU extensions? For example, -std=gnu2003 would enforce
> > Fortran 2003, but allow GNU extensions. The problem is that
> > gfortran allows several extensions that violate the
> > standard.
>
> The idea is that -std=gnu2003 would allow 2003 features plus GNU extensions,
> but reject any 2008 and 2018 features (like submodules and coarrays).
>
I see. It seems counter-intuitive to me for someone to want,
for example, -std=gnu2003, which accepts the garbage that
GFC_STD_GNU permits, F2003 conformance, and suppresses F2008
and F2018. I would rather have gfortran encourage programmers
to write standard conforming code.
In any event, looking at fortran/libgfortran.h, we have
#define GFC_STD_OPT_F95 (GFC_STD_F77 | GFC_STD_F95 | GFC_STD_F95_OBS \
| GFC_STD_F2008_OBS | GFC_STD_F2018_OBS \
| GFC_STD_F2018_DEL)
#define GFC_STD_OPT_F03 (GFC_STD_OPT_F95 | GFC_STD_F2003)
#define GFC_STD_OPT_F08 (GFC_STD_OPT_F03 | GFC_STD_F2008)
#define GFC_STD_OPT_F18 ((GFC_STD_OPT_F08 | GFC_STD_F2018) \
& (~GFC_STD_F2018_DEL))
We could add
#define GFC_STD_OPT_GNU03 (GFC_STD_OPT_F03 | GFC_STD_GNU)
#define GFC_STD_OPT_GNU08 (GFC_STD_OPT_F08 | GFC_STD_GNU)
#define GFC_STD_OPT_GNU18 (GFC_STD_OPT_F18 | GFC_STD_GNU)
then in options.c (gfc_handle_options) the case statements
would be
case OPT_std_gnu2003:
gfc_option.allow_std = GFC_STD_OPT_GNU03;
gfc_option.warn_std = GFC_STD_F95_OBS;
gfc_option.max_identifier_length = 63;
warn_ampersand = 1;
warn_tabs = 1;
break;
case OPT_std_gnu2008:
gfc_option.allow_std = GFC_STD_OPT_GNU08;
gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
gfc_option.max_identifier_length = 63;
warn_ampersand = 1;
warn_tabs = 1;
break;
case OPT_std_gnu2018:
gfc_option.allow_std = GFC_STD_OPT_F18;
gfc_option.warn_std=GFC_STD_F95_OBS|GFC_STD_F2008_OBS|GFC_STD_F2018_OBS;
gfc_option.max_identifier_length = 63;
warn_ampersand = 1;
warn_tabs = 1;
break;
then finally lang.opt (and of course documentation would add)
std=gnu2003
Fortran
Conform to the ISO Fortran 2003 standard with GNU Fortran extensions.
std=gnu2008
Fortran
Conform to the ISO Fortran 2008 standard with GNU Fortran extensions.
std=gnu2018
Fortran
Conform to the ISO Fortran 2018 standard with GNU Fortran extensions.
>From gcc-bugs-return-639875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 23:32:59 2019
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Subject: [Bug c/89968] attribute packed fails to reduce char vector member alignment
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The alignment is respected for members of other types than char so the order of
the attributes doesn't seem to matter here (it does matter in pr89950):
$ cat pr89968-2.c && gcc -S -O2 -Wall -fdump-tree-optimized=/dev/stdout
pr89968-2.c
struct S
{
char c;
__attribute__ ((aligned (64), packed, vector_size (1024))) int v; // okay
};
int f (void) { return sizeof (struct S); } // 1088
int g (void) { return __alignof__ (struct S); } // 64
__attribute__ ((aligned (64), vector_size (1024))) int v1;
int h1 (void) { return __alignof__ (v1); } // 1024
__attribute__ ((vector_size (1024), aligned (64))) int v2;
int h2 (void) { return __alignof__ (v2); } // 64
;; Function f (f, funcdef_no=0, decl_uid=1909, cgraph_uid=1, symbol_order=0)
f ()
{
<bb 2> [local count: 1073741824]:
return 1088;
}
;; Function g (g, funcdef_no=1, decl_uid=1912, cgraph_uid=2, symbol_order=1)
g ()
{
<bb 2> [local count: 1073741824]:
return 64;
}
;; Function h1 (h1, funcdef_no=2, decl_uid=1916, cgraph_uid=3, symbol_order=3)
h1 ()
{
<bb 2> [local count: 1073741824]:
return 1024;
}
;; Function h2 (h2, funcdef_no=5, decl_uid=1920, cgraph_uid=4, symbol_order=5)
h2 ()
{
<bb 2> [local count: 1073741824]:
return 64;
}
>From gcc-bugs-return-639876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 23:35:56 2019
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Subject: [Bug c/89950] attribute aligned ignored with attribute vector_size
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=89968
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, unlike in pr89968, in this case the order of the attributes matters. When
aligned comes after vector_size the former is respected.
>From gcc-bugs-return-639878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 23:38:31 2019
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Subject: [Bug libstdc++/89986] [9 Regression] missing export for directory_iterator::increment
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-639877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 05 23:38:11 2019
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #20 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And fixed, again.
>From gcc-bugs-return-639879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 00:50:54 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/89993] New: Inconsistent incoming stack boundary
Date: Sat, 06 Apr 2019 00:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89993
Bug ID: 89993
Summary: Inconsistent incoming stack boundary
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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CC: ubizjak at gmail dot com
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Target: i386,x86-64
It looks like the default incoming stack isn't a constant:
[hjl@gnu-cfl-1 tmp]$ cat a.c
int tst2Foo(int*, int*, int);
int tst1Foo(int* pSrc, int* pDst, int len)
{
return tst2Foo(pSrc, pDst, len);
}
[hjl@gnu-cfl-1 tmp]$ gcc -mstackrealign -S -O2 a.c
[hjl@gnu-cfl-1 tmp]$ cat a.s
.file "a.c"
.text
.p2align 4,,15
.globl tst1Foo
.type tst1Foo, @function
tst1Foo:
.LFB0:
.cfi_startproc
jmp tst2Foo
.cfi_endproc
.LFE0:
.size tst1Foo, .-tst1Foo
.ident "GCC: (GNU) 8.3.1 20190311 (Red Hat 8.3.1-3)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 tmp]$ gcc -mstackrealign -S -O2 a.c -mincoming-stack-boundary=3
[hjl@gnu-cfl-1 tmp]$ cat a.s
.file "a.c"
.text
.p2align 4,,15
.globl tst1Foo
.type tst1Foo, @function
tst1Foo:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-16, %rsp
call tst2Foo
leave
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size tst1Foo, .-tst1Foo
.ident "GCC: (GNU) 8.3.1 20190311 (Red Hat 8.3.1-3)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 tmp]$ cat b.c
#include <xmmintrin.h>
int tst2Foo(int*, int*, int, __m128*);
int tst1Foo(int* pSrc, int* pDst, int len)
{
__m128 x;
return tst2Foo(pSrc, pDst, len, &x);
}
[hjl@gnu-cfl-1 tmp]$ gcc -mstackrealign -S -O2 b.c -mincoming-stack-boundary=4
[hjl@gnu-cfl-1 tmp]$ cat b.s
.file "b.c"
.text
.p2align 4,,15
.globl tst1Foo
.type tst1Foo, @function
tst1Foo:
.LFB526:
.cfi_startproc
subq $24, %rsp
.cfi_def_cfa_offset 32
movq %rsp, %rcx
call tst2Foo
addq $24, %rsp
.cfi_def_cfa_offset 8
ret
.cfi_endproc
.LFE526:
.size tst1Foo, .-tst1Foo
.ident "GCC: (GNU) 8.3.1 20190311 (Red Hat 8.3.1-3)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 tmp]$
>From gcc-bugs-return-639880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 02:20:37 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84382] add command-line options -std=gnu2003 and -std=gnu2008 for gfortran
Date: Sat, 06 Apr 2019 02:20:00 -0000
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--- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Apr 05, 2019 at 11:15:30PM +0000, sgk at troutmask dot
apl.washington.edu wrote:
>
> We could add
>
> #define GFC_STD_OPT_GNU03 (GFC_STD_OPT_F03 | GFC_STD_GNU)
> #define GFC_STD_OPT_GNU08 (GFC_STD_OPT_F08 | GFC_STD_GNU)
> #define GFC_STD_OPT_GNU18 (GFC_STD_OPT_F18 | GFC_STD_GNU)
>
Against my better judgment.
%cat a.f90
program foo
integer :: i = z'1234' ! Nonstandard initialization
print *, i
end program foo
% gfcx -o z a.f90 && ./z
4660
% gfcx -o z -std=f2003 a.f90 && ./z
a.f90:2:17:
2 | integer :: i = z'1234' ! Nonstandard initialization
| 1
Error: GNU Extension: BOZ literal at (1) outside a DATA statement and outside
INT/REAL/DBLE/CMPLX
% gfcx -o z -std=gnu2003 a.f90 && ./z
4660
Index: gcc/fortran/libgfortran.h
===================================================================
--- gcc/fortran/libgfortran.h (revision 270181)
+++ gcc/fortran/libgfortran.h (working copy)
@@ -46,6 +46,10 @@ along with GCC; see the file COPYING3. If not see
#define GFC_STD_OPT_F18 ((GFC_STD_OPT_F08 | GFC_STD_F2018) \
& (~GFC_STD_F2018_DEL))
+#define GFC_STD_OPT_GNU03 (GFC_STD_OPT_F03 | GFC_STD_GNU)
+#define GFC_STD_OPT_GNU08 (GFC_STD_OPT_F08 | GFC_STD_GNU)
+#define GFC_STD_OPT_GNU18 (GFC_STD_OPT_F18 | GFC_STD_GNU)
+
/* Bitmasks for the various FPE that can be enabled. These need to be
straight integers
e.g., 8 instead of (1<<3), because they will be included in Fortran source.
*/
#define GFC_FPE_INVALID 1
Index: gcc/fortran/lang.opt
===================================================================
--- gcc/fortran/lang.opt (revision 270181)
+++ gcc/fortran/lang.opt (working copy)
@@ -826,6 +826,18 @@ std=gnu
Fortran
Conform to nothing in particular.
+std=gnu2003
+Fortran
+Conform to the ISO Fortran 2003 standard with GNU Fortran extensions.
+
+std=gnu2008
+Fortran
+Conform to the ISO Fortran 2008 standard with GNU Fortran extensions.
+
+std=gnu2018
+Fortran
+Conform to the ISO Fortran 2018 standard with GNU Fortran extensions.
+
std=legacy
Fortran
Accept extensions to support legacy code.
Index: gcc/fortran/options.c
===================================================================
--- gcc/fortran/options.c (revision 270181)
+++ gcc/fortran/options.c (working copy)
@@ -778,6 +778,31 @@ gfc_handle_option (size_t scode, const char *arg, HOST
set_default_std_flags ();
break;
+ case OPT_std_gnu2003:
+ gfc_option.allow_std = GFC_STD_OPT_GNU03;
+ gfc_option.warn_std = GFC_STD_F95_OBS;
+ gfc_option.max_identifier_length = 63;
+ warn_ampersand = 1;
+ warn_tabs = 1;
+ break;
+
+ case OPT_std_gnu2008:
+ gfc_option.allow_std = GFC_STD_OPT_GNU08;
+ gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS;
+ gfc_option.max_identifier_length = 63;
+ warn_ampersand = 1;
+ warn_tabs = 1;
+ break;
+
+ case OPT_std_gnu2018:
+ gfc_option.allow_std = GFC_STD_OPT_GNU18;
+ gfc_option.warn_std = GFC_STD_F95_OBS | GFC_STD_F2008_OBS
+ | GFC_STD_F2018_OBS;
+ gfc_option.max_identifier_length = 63;
+ warn_ampersand = 1;
+ warn_tabs = 1;
+ break;
+
case OPT_std_legacy:
set_default_std_flags ();
gfc_option.warn_std = 0;
Index: gcc/fortran/invoke.texi
===================================================================
--- gcc/fortran/invoke.texi (revision 270181)
+++ gcc/fortran/invoke.texi (working copy)
@@ -492,23 +492,28 @@ representation of the translated Fortran code, produce
@item -std=@var{std}
@opindex @code{std=}@var{std} option
-Specify the standard to which the program is expected to conform,
-which may be one of @samp{f95}, @samp{f2003}, @samp{f2008},
-@samp{f2018}, @samp{gnu}, or @samp{legacy}. The default value for
-@var{std} is @samp{gnu}, which specifies a superset of the latest
-Fortran standard that includes all of the extensions supported by GNU
-Fortran, although warnings will be given for obsolete extensions not
+Specify the standard to which the program is expected to conform
+which may be one of @samp{f95}, @samp{f2003}, @samp{f2008}, @samp{f2018},
+@samp{gnu}, @samp{gnu2003}, @samp{gnu2008}, @samp{gnu2018},or @samp{legacy}.
+The default value for @var{std} is @samp{gnu}, which specifies a superset
+of the latest Fortran standard that includes all of the extensions supported
+by GNU Fortran, although warnings will be given for obsolete extensions not
recommended for use in new code. The @samp{legacy} value is
equivalent but without the warnings for obsolete extensions, and may
-be useful for old non-standard programs. The @samp{f95},
+be useful for old nonstandard programs. The @samp{f95},
@samp{f2003}, @samp{f2008}, and @samp{f2018} values specify strict
conformance to the Fortran 95, Fortran 2003, Fortran 2008 and Fortran
2018 standards, respectively; errors are given for all extensions
beyond the relevant language standard, and warnings are given for the
Fortran 77 features that are permitted but obsolescent in later
-standards. The deprecated option @samp{-std=f2008ts} acts as an alias for
+standards. The deprecated option @samp{-std=f2008ts} acts as an alias for
@samp{-std=f2018}. It is only present for backwards compatibility with
earlier gfortran versions and should not be used any more.
+The @samp{gnu2003}, @samp{gnu2008}, and @samp{gnu2018} values specify
+adherences to the Fortran 2003, Fortran 2008 and Fortran
+2018 standards; while allowing GNU Fortran extensions. For example,
+@code{std=gnu2003} would reject Fortran 2008 and 2018 feature, but
+would allow nonstandard construction such as @code{REAL*4}.
@item -ftest-forall-temp
@opindex @code{ftest-forall-temp}
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Sat, 06 Apr 2019 02:32:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #2 from kargl at gcc dot gnu.org ---
(In reply to t.sprodowski from comment #0)
> Following calculation of the complex number leads to a wrong imaginary part:
>
>
> #include <complex>
> #include <iomanip>
> #include <iostream>
>
> int main(int argc, char *argv[])
> {
> std::complex<double> val = std::complex<double>(-1.8425031517782417e-07,
> -0.0);
> std::complex<double> testExp = std::pow(val, 0.5);
> std::cout << "textExp: " << std::setprecision(30) << testExp << std::endl;
> return 0;
> }
>
> Result is:
> (2.6283607659835830609796003783e-20,-0.000429243887758258178214548772544),
> but it should be
> (2.628360765983583e-20, 0.0004292438877582582), obtained from Visual Studio,
> MATLAB and Octave.
>
What version of Octave. I get
>> z = complex(-1.8425031517782417e-07, -0.0)
z = -0.00000018425 - 0.00000000000i
>> z**0.5
ans = 2.6284e-20 - 4.2924e-04i
which agrees with clang++ version 7.0.1 (and apparently g++
which I haven't tested).
>From gcc-bugs-return-639882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 02:40:12 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #40 from Segher Boessenkool <segher at gcc dot gnu.org> ---
You'll get much better results if you don't use insv in your machine
description; writing it with the input and output separate (and then
using a "0" constraint) is much friendlier to the optimisers.
>From gcc-bugs-return-639883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 02:51:12 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #41 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Seeing that the code in your examples can be expressed as a bitfield insert
requires that combine sees that only the low 8 bits of reg 93 can be non-zero,
by the way. It usually does not know this. It could in this case if it was
combining insn 6 as well. Did it try that before? What happened?
>From gcc-bugs-return-639884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 04:32:52 2019
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Subject: [Bug rtl-optimization/80960] [7/8/9 Regression] Huge memory use when compiling a very large test case
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--- Comment #19 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #18)
> Hmm, so if we'd have numbered stmts in an EBB we could check the
> distance between set and use and not combine when that gets too big?
Yeah. Or we could even not make a LOG_LINK in the first place between
statements that are too far apart.
> > Combine also makes garbage for every try, and none of that is cleaned
> > up during combine. Maybe we should change that? (I can try next week).
>
> Not sure how easy that is but yes, it might help quite a bit due
> to less churn on the cache. Just ggc_free()ing the "toplevel"
> RTX of failed attempts might already help a bit. It's of course
> kind-of a hack then but with an appropriate comment it would be
> fine I guess (recursively ggc_free()ing might run into sharing
> issues so that probably won't work).
combine does not change anything *between* combination attempts, and
all attempts go via the same function (try_combine), so calling gcc_collect
should be fine. Manually gcc_free'ing things would be a hack alright.
>From gcc-bugs-return-639885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 04:58:05 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Wilco from comment #8)
> push {r4, lr}
> mov r4, r0
> cmp r4, #0
Why does it copy r0 to r4 and then compare r4? On more modern machines it
is faster to compare r0 itself, and it would allow shrink-wrapping to work
fine here (well, need to move the assignment to r4 down to the block where
it is used, but something will certainly do that, and it is one of the
shrink-wrapping improvements I want to do for GCC 10).
> It seems shrinkwrapping is more random, sometimes it's done as expected,
> sometimes it is not. It was more consistent on older GCC's.
Shrink-wrapping is very predictable. But no block where a non-volatile
register is used or set will get shrink-wrapped. This limitation has
existed since forever.
>From gcc-bugs-return-639886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 05:31:19 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #11)
> (In reply to Wilco from comment #8)
> > mov r4, r0
> > cmp r4, #0
>
> Why does it copy r0 to r4 and then compare r4? On more modern machines it
> is faster to compare r0 itself, and it would allow shrink-wrapping to work
> fine here
We get this in combine:
Trying 2 -> 7:
2: r112:SI=r116:SI
REG_DEAD r116:SI
7: cc:CC=cmp(r112:SI,0)
Successfully matched this instruction:
(parallel [
(set (reg:CC 100 cc)
(compare:CC (reg:SI 116)
(const_int 0 [0])))
(set (reg/v:SI 112 [ a ])
(reg:SI 116))
])
(that's *movsi_compare0).
This is preceded by
(insn 50 3 7 2 (set (reg:SI 116)
(reg:SI 0 r0 [ a ])) "ira-shrinkwrap-prep-1.c":14:1 179
{*arm_movsi_insn}
(nil))
And it stays that way until IRA, which does
Disposition:
0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
5:r116 l0 4 4:r117 l0 0
If r116 had been allocated hard reg 0 all would be fine (and we know r116
dies in insn 7 already, there is a REG_DEAD note on it).
>From gcc-bugs-return-639887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 06:47:31 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #3 from t.sprodowski at web dot de ---
Octave 4.2.2: ans = 2.6284e-20 + 4.2924e-04i
>From gcc-bugs-return-639888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 10:09:39 2019
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Subject: [Bug c++/89994] New: [8 Regression] ICE (segfault) in compare_ics
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Bug ID: 89994
Summary: [8 Regression] ICE (segfault) in compare_ics
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$ cat test.ii
template <int, int, bool, class> class a;
namespace b {
template <typename, unsigned long, long, unsigned long, typename...> class b;
template <unsigned long, typename> struct c;
template <typename l, unsigned long d, unsigned long dim, typename... curshape>
struct c<d, b<l, dim, 0, dim, curshape...>> {
using e = typename c<d - 1, b<l, dim, 0, dim, a<0, 1, true, void>>>::e;
};
template <typename l, unsigned long dim, typename... curshape>
struct c<0, b<l, dim, 0, dim, curshape...>> {
using e = b<l, dim, 0, dim, curshape...>;
};
template <typename l, unsigned long f,
template <int, int, bool, typename> class baseclass, int g, int h,
typename i, typename... j>
class b<l, f, 0, f, baseclass<g, h, true, i>, j...> {
b(long);
b(const long (&)[]);
};
} // namespace b
template <long dim, typename l = double>
using blaspp = typename b::c<dim, b::b<l, dim, 0, dim>>::e;
blaspp<1> k({4})
$ g++ -c test.ii
test.ii:23:16: internal compiler error: Segmentation fault
blaspp<1> k({4})
^
0x8a0698 crash_signal
../../src/gcc/toplev.c:325
0x5aa51e compare_ics
../../src/gcc/cp/call.c:9684
0xe8cbe1 joust
../../src/gcc/cp/call.c:10124
0xe8a7f6 tourney
../../src/gcc/cp/call.c:10526
0xe8a7f6 build_new_method_call_1
../../src/gcc/cp/call.c:9295
0xe8a7f6 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
../../src/gcc/cp/call.c:9462
0xe8a7f6 build_special_member_call(tree_node*, tree_node*, vec<tree_node*,
va_gc, vl_embed>**, tree_node*, int, int)
../../src/gcc/cp/call.c:8989
0xede19b expand_default_init
../../src/gcc/cp/init.c:1906
0xede19b expand_aggr_init_1
../../src/gcc/cp/init.c:2021
0xede19b build_aggr_init(tree_node*, tree_node*, int, int)
../../src/gcc/cp/init.c:1761
0xec44b8 build_aggr_init_full_exprs
../../src/gcc/cp/decl.c:6292
0xec44b8 check_initializer
../../src/gcc/cp/decl.c:6441
0xec2cbf cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../src/gcc/cp/decl.c:7154
0xf03597 cp_parser_init_declarator
../../src/gcc/cp/parser.c:19819
0xefec29 cp_parser_simple_declaration
../../src/gcc/cp/parser.c:13058
0xefe415 cp_parser_block_declaration
../../src/gcc/cp/parser.c:12877
0xefd737 cp_parser_declaration
../../src/gcc/cp/parser.c:12775
0xefd54a cp_parser_declaration_seq_opt
../../src/gcc/cp/parser.c:12651
0x14ba85b cp_parser_translation_unit
../../src/gcc/cp/parser.c:4563
0x14ba85b c_parse_file()
../../src/gcc/cp/parser.c:39118
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
$ g++-7 -c test.ii
test.ii:18:21: error: parameter '<anonymous>' includes reference to array of
unknown bound 'const long int []'
b(const long (&)[]);
^
test.ii:23: confused by earlier errors, bailing out
$ g++-9 -c test.ii
test.ii:23:16: error: call of overloaded 'b(<brace-enclosed initializer list>)'
is ambiguous
23 | blaspp<1> k({4})
| ^
test.ii:18:3: note: candidate: 'b::b<l, f, 0, f, baseclass<g, h, true, i>, j
...>::b(const long int (&)[]) [with l = double; long unsigned int f = 1;
baseclass = a; int g = 0; int h = 1; i = void; j = {}]'
18 | b(const long (&)[]);
| ^
test.ii:17:3: note: candidate: 'b::b<l, f, 0, f, baseclass<g, h, true, i>, j
...>::b(long int) [with l = double; long unsigned int f = 1; baseclass = a; int
g = 0; int h = 1; i = void; j = {}]'
17 | b(long);
| ^
test.ii:16:7: note: candidate: 'constexpr b::b<double, 1, 0, 1, a<0, 1, true,
void> >::b(const b::b<double, 1, 0, 1, a<0, 1, true, void> >&)'
16 | class b<l, f, 0, f, baseclass<g, h, true, i>, j...> {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test.ii:16:7: note: candidate: 'constexpr b::b<double, 1, 0, 1, a<0, 1, true,
void> >::b(b::b<double, 1, 0, 1, a<0, 1, true, void> >&&)'
test.ii:23:16: error: expected ',' or ';' at end of input
23 | blaspp<1> k({4})
| ^
>From gcc-bugs-return-639889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 10:10:27 2019
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Subject: [Bug c++/89994] [8 Regression] ICE (segfault) in compare_ics
Date: Sat, 06 Apr 2019 10:10:00 -0000
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Matthias Klose <doko at debian dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Known to work| |7.4.1, 9.0
Known to fail| |8.3.1
--- Comment #1 from Matthias Klose <doko at debian dot org> ---
works on the gcc-7 branch and the trunk, ICEs on the gcc-8-branch.
>From gcc-bugs-return-639890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 10:44:39 2019
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Subject: [Bug fortran/79842] i18n: subword translation in "Can't use the same %smodule"
Date: Sat, 06 Apr 2019 10:44:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |dominiq at lps dot ens.fr
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Updated patch I am planning to commit
--- ../_clean/gcc/fortran/module.c 2019-03-21 20:46:46.000000000 +0100
+++ gcc/fortran/module.c 2019-04-06 12:40:17.000000000 +0200
@@ -7144,8 +7144,10 @@ gfc_use_module (gfc_use_list *module)
for (p = gfc_state_stack; p; p = p->previous)
if ((p->state == COMP_MODULE || p->state == COMP_SUBMODULE)
&& strcmp (p->sym->name, module_name) == 0)
- gfc_fatal_error ("Cannot USE the same %smodule we're building",
- p->state == COMP_SUBMODULE ? "sub" : "");
+ if (p->state == COMP_SUBMODULE)
+ gfc_fatal_error ("Cannot USE a submodule that is currently built");
+ else
+ gfc_fatal_error ("Cannot USE a module that is currently built");
init_pi_tree ();
init_true_name_tree ();
AFAICT the errors are not covered by the test suite.
>From gcc-bugs-return-639891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 12:19:48 2019
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Subject: [Bug fortran/82055] segfault compiling F2003 functionality
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|segfault compiling F2003 |segfault compiling F2003
|functionality: 4.9.3, |functionality
|5.3.0 and 6.3.0 |
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Compiling the test with my recent instrumented compiler (9.0) gives
../../work/gcc/tree.h:3289:28: runtime error: member access within null pointer
of type 'union tree_node'
thus I have removed the references to unsupported versions.
>From gcc-bugs-return-639892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 12:40:33 2019
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Subject: [Bug fortran/51961] [OOP] ALLOCATE with MOLD= rejects if source-expr has a different rank
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
CC| |janus at gcc dot gnu.org
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> What is allocate supposed to do if the array and the mold are not
> conformable?
No answer after more than six years!-(Shall I close the PR as INVALID to get
one?).
>From gcc-bugs-return-639894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 12:49:46 2019
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Subject: [Bug c/89985] [9 Regression] Stray notes from OPT_Waddress_of_packed_member with -w
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> since the issue of calls to inform being done without checking the return
> value of warning[_at] first seems to keep coming up, I almost wonder if it's
> worth adding __attribute__((unused_result)) to warning[_at]...
er __attribute__((warn_unused_result)) I mean
>From gcc-bugs-return-639893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 12:49:04 2019
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
since the issue of calls to inform being done without checking the return value
of warning[_at] first seems to keep coming up, I almost wonder if it's worth
adding __attribute__((unused_result)) to warning[_at]...
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Subject: [Bug fortran/89981] [8/9 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Apr 6 14:16:01 2019
New Revision: 270182
URL: https://gcc.gnu.org/viewcvs?rev=270182&root=gcc&view=rev
Log:
2019-04-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/89981
* resolve.c (resolve_global_procedure): If the global symbol is an
ENTRY, also look up its name among the entries.
2019-04-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/89981
* gfortran.dg/entry_22.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/entry_22.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/testsuite/ChangeLog
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89981] [8 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
Date: Sat, 06 Apr 2019 14:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89981
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] gfortran |[8 Regression] gfortran
|-pedantic rejects code in |-pedantic rejects code in
|8.3.1 that is accepted with |8.3.1 that is accepted with
|8.3.0 |8.3.0
--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-639897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 14:49:42 2019
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/79842] i18n: subword translation in "Can't use the same %smodule"
Date: Sat, 06 Apr 2019 14:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79842
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The patch in comment 4 does not bootstrap:
../../work/gcc/fortran/module.c: In function 'void
gfc_use_module(gfc_use_list*)':
../../work/gcc/fortran/module.c:7145:8: error: suggest explicit braces to avoid
ambiguous 'else' [-Werror=dangling-else]
7145 | if ((p->state == COMP_MODULE || p->state == COMP_SUBMODULE)
| ^
cc1plus: all warnings being treated as errors
This one does
--- ../_clean/gcc/fortran/module.c 2019-03-21 20:46:46.000000000 +0100
+++ gcc/fortran/module.c 2019-04-06 16:39:02.000000000 +0200
@@ -7144,8 +7144,12 @@ gfc_use_module (gfc_use_list *module)
for (p = gfc_state_stack; p; p = p->previous)
if ((p->state == COMP_MODULE || p->state == COMP_SUBMODULE)
&& strcmp (p->sym->name, module_name) == 0)
- gfc_fatal_error ("Cannot USE the same %smodule we're building",
- p->state == COMP_SUBMODULE ? "sub" : "");
+ {
+ if (p->state == COMP_SUBMODULE)
+ gfc_fatal_error ("Cannot USE a submodule that is currently built");
+ else
+ gfc_fatal_error ("Cannot USE a module that is currently built");
+ }
init_pi_tree ();
init_true_name_tree ();
>From gcc-bugs-return-639898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 17:09:29 2019
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Subject: [Bug rtl-optimization/80960] [7/8/9 Regression] Huge memory use when compiling a very large test case
Date: Sat, 06 Apr 2019 17:09:00 -0000
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--- Comment #20 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Updated timings
% gfc6 -c pr80960.f90 -fdefault-integer-8 -O2 -ftime-report
...
combiner : 81.12 (55%) usr 1.17 (41%) sys 82.31 (54%) wall
2700699 kB (60%) ggc
...
TOTAL : 148.83 2.87 151.88
4503753 kB
% gfc7 -c pr80960.f90 -fdefault-integer-8 -O2 -ftime-report
...
combiner : 153.49 (67%) usr 1.64 (44%) sys 155.24 (67%) wall
2700699 kB (60%) ggc
...
TOTAL : 228.22 3.77 232.32
4508399 kB
% gfc8 -c pr80960.f90 -fdefault-integer-8 -O2 -ftime-report
...
combiner : 427.57 ( 85%) 2.17 ( 53%) 430.01 ( 84%)
2700709 kB ( 60%)
...
TOTAL : 505.59 4.06 510.13
4499127 kB
% gfcp -c pr80960.f90 -fdefault-integer-8 -O2 -ftime-report
...
combiner : 426.78 ( 85%) 1.55 ( 47%) 428.43 ( 85%)
2700713 kB ( 60%)
...
TOTAL : 502.36 3.31 505.81
4501068 kB
>From gcc-bugs-return-639899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 17:25:11 2019
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From: "gabriel.aubut-lussier at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89995] New: Misleading error message 'this' was not captured for this lambda function
Date: Sat, 06 Apr 2019 17:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89995
Bug ID: 89995
Summary: Misleading error message 'this' was not captured for
this lambda function
Product: gcc
Version: 9.0
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The error message given when 'this' cannot be captured is misleading in the
sense that it points the user to the lambda that fails to capture 'this' rather
than raise questions about why it fails to do so.
The icc compiler does the best job of giving context with this error. MSVC also
displays a bit more information. Clang has the worst offender. GCC could use a
bit of improvement. Aiming for an error message that is closer to icc seems
like the ideal solution. The error message given by icc is the following:
error: this enclosing-function local variable cannot be referenced in this
lambda body because an enclosing lambda does not allow implicit captures
Godbolt : https://gcc.godbolt.org/z/rmefHT
Sample code for the issue:
struct S
{
void f() {
[]() {
[this]() {
}();
}();
}
};
int main()
{
S s;
s.f();
}
>From gcc-bugs-return-639900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 17:35:32 2019
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Subject: [Bug fortran/57262] Optimize bound intrinsics with dim=var for rank one arrays
Date: Sat, 06 Apr 2019 17:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57262
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Not convinced, but let me move it to NEW.
More than three years later I am still not convince that such nano-optimisation
has any interest. What about closing this PR as WONTFIX.
>From gcc-bugs-return-639901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 17:50:00 2019
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From: "gandalf at winds dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/89996] New: [avr] ICE in expand_expr_real_2 with -O3
Date: Sat, 06 Apr 2019 17:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89996
Bug ID: 89996
Summary: [avr] ICE in expand_expr_real_2 with -O3
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
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The following fails with GCC 8.2 and 8.3 on AVR. The below output is from 8.3:
# avr-gcc -v -O3 -mmcu=atmega1284p -c test2.c -o test2.o
Using built-in specs.
Reading specs from
/usr/local/avr/lib/gcc/avr/8.3.0/device-specs/specs-atmega1284p
COLLECT_GCC=avr-gcc
Target: avr
Configured with: ../configure --target=avr --prefix=/usr/local/avr
--disable-nls --enable-languages=c --disable-bootstrap --disable-libssp
Thread model: single
gcc version 8.3.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-O3' '-c' '-o' 'test2.o'
'-specs=device-specs/specs-atmega1284p' '-mmcu=avr51'
/usr/local/avr/libexec/gcc/avr/8.3.0/cc1 -quiet -v -imultilib avr51
-D__AVR_ATmega1284P__ -D__AVR_DEVICE_NAME__=atmega1284p test2.c -mn-flash=2
-mno-skip-bug -quiet -dumpbase test2.c -mmcu=avr51 -auxbase-strip test2.o -O3
-version -o /tmp/ccYds885.s
GNU C17 (GCC) version 8.3.0 (avr)
compiled by GNU C version 8.3.0, GMP version 6.1.2, MPFR version 4.0.2,
MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/usr/local/avr/lib/gcc/avr/8.3.0/../../../../avr/sys-include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/avr/lib/gcc/avr/8.3.0/include
/usr/local/avr/lib/gcc/avr/8.3.0/include-fixed
/usr/local/avr/lib/gcc/avr/8.3.0/../../../../avr/include
End of search list.
GNU C17 (GCC) version 8.3.0 (avr)
compiled by GNU C version 8.3.0, GMP version 6.1.2, MPFR version 4.0.2,
MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: e17ca263eb8b0996b4ab7dcf63f27ece
during RTL pass: expand
test2.c: In function 'send_document.isra.0.constprop':
test2.c:33:11: internal compiler error: in expand_expr_real_2, at expr.c:8573
0x51269b expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc/expr.c:8573
0x70e9a0 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:9968
0x71c001 expand_expr
../../gcc/expr.h:280
0x71c001 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc/expr.c:8575
0x70e9a0 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:9968
0x6195f1 expand_normal
../../gcc/expr.h:286
0x6195f1 precompute_register_parameters
../../gcc/calls.c:989
0x6195f1 expand_call(tree_node*, rtx_def*, int)
../../gcc/calls.c:4127
0x70e2e6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:11050
0x71734b store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
../../gcc/expr.c:5651
0x718189 expand_assignment(tree_node*, tree_node*, bool)
../../gcc/expr.c:5419
0x718189 expand_assignment(tree_node*, tree_node*, bool)
../../gcc/expr.c:4954
0x626e38 expand_call_stmt
../../gcc/cfgexpand.c:2702
0x626e38 expand_gimple_stmt_1
../../gcc/cfgexpand.c:3638
0x626e38 expand_gimple_stmt
../../gcc/cfgexpand.c:3804
0x628c4f expand_gimple_basic_block
../../gcc/cfgexpand.c:5833
0x62dcc6 execute
../../gcc/cfgexpand.c:6439
Please submit a full bug report.
Code to reproduce:
extern char *strrchr(const char *, int) __attribute__((__pure__));
extern int strcasecmp_P(const char *, const char *) __attribute__((__pure__));
static const struct {
char ext[5];
const char __flash *desc;
_Bool subst;
} __flash mime_types[]={
{"txt", ((const char __flash []){("text/plain; charset=utf-8")}), 1},
{"html", ((const char __flash []){("text/html; charset=utf-8")}), 1},
{"htm", ((const char __flash []){("text/html; charset=utf-8")}), 1},
};
struct http {
char uri[128];
_Bool sendfile_subst;
};
typedef struct {
unsigned char user[sizeof(struct http)];
} DESC;
static void send_document(DESC *d, short err, const char __flash *err_string,
const char *file, _Bool conn_close)
{
struct http *hd=(void *)d->user;
const char *ext;
unsigned char i;
_Bool subst=0;
if((ext=strrchr(file, '.'))) {
for(i=0;i < (int)(sizeof(mime_types)/sizeof(mime_types[0]));i++)
if(!strcasecmp_P(ext, mime_types[i].ext)) {
subst=mime_types[i].subst;
break;
}
}
hd->sendfile_subst=subst;
}
static void http_do_uri_request(DESC *d)
{
struct http *hd=(void *)d->user;
char *uri=hd->uri;
if(*uri != '/') {
send_document(d, 400, ({ static const char __flash _str[]=("Bad Request");
_str; }), "error/400.html", 1);
return;
}
send_document(d, 403, ({ static const char __flash _str[]=("Forbidden");
_str; }), "error/403.html", 0);
}
int main()
{
http_do_uri_request((void *)123);
}
Notes:
The ICE does not happen if flag -O2 is used instead of -O3.
Also no ICE happens if the __flash keyword is removed from before
"mime_types[]={".
Also no ICE happens if the number of entries in mime_types[] is less than 3.
>From gcc-bugs-return-639902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 18:26:29 2019
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Subject: [Bug tree-optimization/85459] [8 Regression] Larger code generated from GMP template meta-programming
Date: Sat, 06 Apr 2019 18:26:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] Larger |[8 Regression] Larger code
|code generated from GMP |generated from GMP template
|template meta-programming |meta-programming
--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
Seems fixed on trunk.
>From gcc-bugs-return-639903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 22:11:03 2019
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Subject: [Bug fortran/87352] [7/8/9 Regression] Large stack usage with new gfortran
Date: Sat, 06 Apr 2019 22:11:00 -0000
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--- Comment #15 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sat Apr 6 22:10:28 2019
New Revision: 270184
URL: https://gcc.gnu.org/viewcvs?rev=270184&root=gcc&view=rev
Log:
2019-04-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87352
* gfortran.h (gfc_component): Add finalized field.
* class.c (finalize_component): If the component is already
finalized, return early. Set component->finalized on exit.
2019-04-06 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87352
* gfortran.dg/finalize_28.f90: Adjust count of __builtin_free.
* gfortran.dg/finalize_33.f90: Likewise.
* gfortran.dg/finalize_34.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/finalize_34.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/class.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/finalize_28.f90
trunk/gcc/testsuite/gfortran.dg/finalize_33.f90
>From gcc-bugs-return-639904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 06 23:25:44 2019
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From: "redbeard0531 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89997] New: Garbled expression in error message with -fconcepts
Date: Sat, 06 Apr 2019 23:25:00 -0000
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Bug ID: 89997
Summary: Garbled expression in error message with -fconcepts
Product: gcc
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Usually -fconcepts delivers excellent error messages, but this one is pretty
bad. It looks like this goes back to 6.2, when it first started to show the
expression.
https://godbolt.org/z/m9DlOZ
struct Y;
struct X {
Y operator<< (const char*);
};
struct Y {
X operator<< (void*);
};
template <typename T>
void check() requires requires (X x, T val) { x << "hello" << val; } {}
void test() {
check<int*>(); // no error
check<int>(); // mangled error
}
-------------
<source>: In function 'void test()':
<source>:16:16: error: cannot call function 'void check() requires (<requires
(X x, T val) <valid-expression (x.X::operator<<()("hello") << val)>> [with T =
int]'
16 | check<int>(); // mangled error
| ^
<source>:12:6: note: constraints not satisfied
12 | void check() requires requires (X x, T val) { x << "hello" << val; } {}
| ^~~~~
<source>:12:6: note: with 'X x'
<source>:12:6: note: with 'int val'
<source>:12:6: note: the required expression '("hello"->x.X::operator<<() <<
val)' would be ill-formed
What is that expression? How did it end up applying -> to a string literal!?
>From gcc-bugs-return-639905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 02:17:58 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #42 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The "movk" failures... This is from insv_1.c:
Trying 7, 6 -> 8:
7: r95:DI=0x1d6b00000000
6: r93:DI=r97:DI&0xffff0000ffffffff
REG_DEAD r97:DI
8: r94:DI=r93:DI|r95:DI
REG_DEAD r95:DI
REG_DEAD r93:DI
REG_EQUAL r93:DI|0x1d6b00000000
Failed to match this instruction:
(set (reg:DI 94)
(ior:DI (and:DI (reg:DI 97)
(const_int -281470681743361 [0xffff0000ffffffff]))
(const_int 32345398706176 [0x1d6b00000000])))
Successfully matched this instruction:
(set (reg:DI 95)
(and:DI (reg:DI 97)
(const_int -281470681743361 [0xffff0000ffffffff])))
Failed to match this instruction:
(set (reg:DI 94)
(ior:DI (reg:DI 95)
(const_int 32345398706176 [0x1d6b00000000])))
It should have matched what it originally cam up with, afaics? This is
exactly what movk does? (Don't rely on the input and output regs to agree,
like with insv; that only happens by chance. Instead, use separate operands,
with "0" constraint, etc.)
>From gcc-bugs-return-639906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 02:28:58 2019
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Subject: [Bug target/88839] [SVE] Poor implementation of blend-like permutes
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--- Comment #2 from prathamesh3492 at gcc dot gnu.org ---
Fix committed to sve-acle-branch:
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=2cd1f397ed5a155e74719977823b28777caa8312
Thanks,
Prathamesh
>From gcc-bugs-return-639907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 04:10:17 2019
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Subject: [Bug c/448] <stdint.h>-related issues (C99 issues)
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|netbsd, VxWorks, SymbianOS, |netbsd, SymbianOS, LynxOS,
|LynxOS, QNX, TPF |QNX, TPF
--- Comment #42 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to joseph@codesourcery.com from comment #40)
> The definitions have been added for VxWorks at some point.
(In reply to hainque@adacore.com from comment #41)
> > On 2 Jan 2019, at 23:33, joseph at codesourcery dot com <gcc-bugzilla@gcc.gnu.org> wrote:
> >
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=448
> >
> > --- Comment #40 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
> > The definitions have been added for VxWorks at some point.
>
> Yes, https://gcc.gnu.org/ml/gcc-patches/2017-06/msg00761.html
> I think.
OK, removing it from the list of targets then
>From gcc-bugs-return-639908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 12:42:17 2019
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Subject: [Bug translation/89936] wrong punctuation in tree-profile.c
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--- Comment #6 from Roland Illig <roland.illig at gmx dot de> ---
Thank you very much.
>From gcc-bugs-return-639909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 13:19:42 2019
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Subject: [Bug middle-end/89270] [9 regression] AVR ICE: verify_gimple failed
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--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to gandalf from comment #0)
> I get an ICE
For the time being, you can work around this by a macro from AVR-LibC or some
equivalent inline asm:
#include <avr/pgmspace.h>
void test()
{
extern const char __data_load_end[];
__uint24 top = (__uint24) pgm_get_far_address (__data_load_end);
}
>From gcc-bugs-return-639910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 13:34:10 2019
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Subject: [Bug fortran/55591] strict-aliasing & Fortran
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The -fstrict-aliasing option is enabled at levels -O2, -O3, -Os.
From the gcc manual
> The -fstrict-aliasing option is enabled at levels -O2, -O3, -Os.
From comment 9
> Ugh, this looks like a very bad idea.
In addition I did not see any noticeable improvement with the patch in comment
8, closing as WONTFIX.
>From gcc-bugs-return-639911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 14:27:05 2019
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Subject: [Bug target/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I will.
>From gcc-bugs-return-639912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 16:23:25 2019
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From: "gandalf at winds dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/89998] New: [9 regression] AVR ICE: verify_gimple failed in printf-return-value
Date: Sun, 07 Apr 2019 16:23:00 -0000
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Bug ID: 89998
Summary: [9 regression] AVR ICE: verify_gimple failed in
printf-return-value
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I get an ICE on the following code with GCC 9.0.1 20190407 (experimental)
compiled for AVR. Works in GCC 8.x. If the __flash keyword is taken out before
_str[]=("xx"), then it compiles OK.
unsigned short sprintf(char *str, const char __flash *fmt, ...)
{
__builtin_va_list args;
__builtin_va_start(args, fmt);
__builtin_va_end(args);
return 0;
}
extern char *s;
int main()
{
s+=sprintf(s, ({ static const char __flash _str[]=("xx"); _str; }));
}
# avr-gcc -v -O -mmcu=atmega1284p -c test3.c -o test3.o
Using built-in specs.
Reading specs from
/usr/local/avr/lib/gcc/avr/9.0.1/device-specs/specs-atmega1284p
COLLECT_GCC=avr-gcc
Target: avr
Configured with: ../configure --target=avr --prefix=/usr/local/avr
--disable-nls --enable-languages=c --disable-bootstrap --disable-libssp
Thread model: single
gcc version 9.0.1 20190407 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-O' '-c' '-o' 'test3.o'
'-specs=device-specs/specs-atmega1284p' '-mmcu=avr51'
/usr/local/avr/libexec/gcc/avr/9.0.1/cc1 -quiet -v -imultilib avr51
-D__AVR_ATmega1284P__ -D__AVR_DEVICE_NAME__=atmega1284p test3.c -mn-flash=2
-mno-skip-bug -quiet -dumpbase test3.c -mmcu=avr51 -auxbase-strip test3.o -O
-version -o /tmp/ccm4oBir.s
GNU C17 (GCC) version 9.0.1 20190407 (experimental) (avr)
compiled by GNU C version 8.3.0, GMP version 6.1.2, MPFR version 4.0.2,
MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/usr/local/avr/lib/gcc/avr/9.0.1/../../../../avr/sys-include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/avr/lib/gcc/avr/9.0.1/include
/usr/local/avr/lib/gcc/avr/9.0.1/include-fixed
/usr/local/avr/lib/gcc/avr/9.0.1/../../../../avr/include
End of search list.
GNU C17 (GCC) version 9.0.1 20190407 (experimental) (avr)
compiled by GNU C version 8.3.0, GMP version 6.1.2, MPFR version 4.0.2,
MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 082ea327cdf9723cb24010e987b4f891
test3.c: In function 'main':
test3.c:12:5: error: non-trivial conversion at assignment
12 | int main()
| ^~~~
short unsigned int
int
_6 = 2;
during GIMPLE pass: printf-return-value
test3.c:12:5: internal compiler error: verify_gimple failed
0xc51c8b verify_gimple_in_cfg(function*, bool)
../../gcc/tree-cfg.c:5386
0xb5ff2f execute_function_todo
../../gcc/passes.c:1977
0xb60e6e execute_todo
../../gcc/passes.c:2031
Please submit a full bug report.
>From gcc-bugs-return-639913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 16:44:32 2019
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Subject: [Bug fortran/54880] [OOP] ICE in gfc_create_module_variable, at fortran/trans-decl.c:4013
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> OK. However asserts are not user friendly. ...
Could you please suggest what the error should be?
>From gcc-bugs-return-639914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 16:49:08 2019
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From: "Mohamed.ElSayed-ElSherbiny at vodafone dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/89999] New: build failed with libmpfr.so.1: open failed: No such file or directory
Date: Sun, 07 Apr 2019 16:49:00 -0000
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Bug ID: 89999
Summary: build failed with libmpfr.so.1: open failed: No such
file or directory
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error:
/usr/local/bin/make TARGET=solaris USE_OPENSSL=yes
gcc -Iinclude -Iebtree -Wall -O2 -g -fno-strict-aliasing
-Wdeclaration-after-statement -fomit-frame-pointer -DFD_SETSIZE=65536
-D_REENTRANT -D_XOPEN_SOURCE=500 -D__EXTENSIONS__ -DTPROXY
-DCONFIG_HAP_CRYPT -DNEED_CRYPT_H -DUSE_GETADDRINFO -DENABLE_POLL -DUSE_THREAD
-DUSE_OPENSSL -DCONFIG_HAPROXY_VERSION=\"1.8.18\"
-DCONFIG_HAPROXY_DATE=\"2019/02/06\" -c -o src/ev_poll.o src/ev_poll.c
ld.so.1: cc1: fatal: libmpfr.so.1: open failed: No such file or directory
gcc: Internal error: Killed (program cc1)
Please submit a full bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [src/ev_poll.o] Error 1
>From gcc-bugs-return-639915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 16:56:36 2019
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Subject: [Bug middle-end/89270] [9 regression] AVR ICE: verify_gimple failed
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--- Comment #3 from gandalf at winds dot org ---
(In reply to Georg-Johann Lay from comment #2)
> For the time being, you can work around this by a macro from AVR-LibC or
> some equivalent inline asm
Thanks, that workaround does indeed work (and with slightly smaller code
generated as well).
>From gcc-bugs-return-639916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 18:06:58 2019
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From: "nok.raven at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug regression/89733] [7/8/9 Regression] -Wuninitialized false positive with unclear message pointing to a class name
Date: Sun, 07 Apr 2019 18:06:00 -0000
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Nikita Kniazev <nok.raven at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] False |[7/8/9 Regression]
|positive -Wuninitialized in |-Wuninitialized false
|C++14+ mode |positive with unclear
| |message pointing to a class
| |name
--- Comment #7 from Nikita Kniazev <nok.raven at gmail dot com> ---
I have creduced the repro. https://wandbox.org/permlink/i4BOmwbcWuaSlO1z
template <typename T> struct Y {
T m;
Y(T t) : m(t) {}
};
class F {
public:
~F();
template <class T> F(T&) {}
};
class X {
public:
X(const char* p) : f(p) {}
const char* end_;
mutable F f;
};
void foo() {
Y<X>(X(0));
}
Hope it helps fixing bug/diagnostic.
>From gcc-bugs-return-639917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 19:19:44 2019
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Subject: [Bug target/89945] [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
Date: Sun, 07 Apr 2019 19:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89945
--- Comment #3 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun Apr 7 19:19:08 2019
New Revision: 270190
URL: https://gcc.gnu.org/viewcvs?rev=270190&root=gcc&view=rev
Log:
PR target/89945
* config/i386/i386.md (anddi_1 to andsi_1_zext splitter):
Avoid calling gen_lowpart with SYMBOL_REF and LABEL_REF operand.
testsuite/ChangeLog:
PR target/89945
* gcc.target/i386/pr89945.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr89945.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog
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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
Date: Sun, 07 Apr 2019 19:42:00 -0000
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--- Comment #22 from anlauf at gcc dot gnu.org ---
Author: anlauf
Date: Sun Apr 7 19:42:05 2019
New Revision: 270192
URL: https://gcc.gnu.org/viewcvs?rev=270192&root=gcc&view=rev
Log:
2019-04-07 Harald Anlauf <anlauf@gmx.de>
PR fortran/89904
* ChangeLog: Correct ChangeLog entry.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/89998] [9 regression] AVR ICE: verify_gimple failed in printf-return-value
Date: Sun, 07 Apr 2019 20:39:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 89996 ***
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Subject: [Bug target/89996] [avr] ICE in expand_expr_real_2 with -O3
Date: Sun, 07 Apr 2019 20:39:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 89998 has been marked as a duplicate of this bug. ***
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Subject: [Bug middle-end/89998] [9 regression] AVR ICE: verify_gimple failed in printf-return-value
Date: Sun, 07 Apr 2019 20:40:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Depends on| |89996
Resolution|DUPLICATE |---
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Maybe not exactly a dup but a related one.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89996
[Bug 89996] [avr] ICE in expand_expr_real_2 with -O3
>From gcc-bugs-return-639922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 20:41:24 2019
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Subject: [Bug fortran/54880] [OOP] ICE in gfc_create_module_variable, at fortran/trans-decl.c:4013
Date: Sun, 07 Apr 2019 20:41:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu.org
--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
It is not completely clear to me what the desired behavior should be.
Reading in a module file from one file and then recompiling the
same module sounds wrong. This should be caught.
Putting
module m1
use m2
end module m1
module m2
end module m2
into a single file also seems strange. Maybe try to catch this earlier
and issue an error like "Trying to re-compile module %qs which was already
read in from %qs would be clear?
Definitely gcc 10 material.
>From gcc-bugs-return-639923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 07 20:57:04 2019
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Subject: [Bug other/89999] build failed with libmpfr.so.1: open failed: No such file or directory
Date: Sun, 07 Apr 2019 20:57:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
libmpfr.so.1 is not in your library search path.
Please figure out why that is not the case.
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Subject: [Bug other/89999] build failed with libmpfr.so.1: open failed: No such file or directory
Date: Sun, 07 Apr 2019 23:06:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please read https://gcc.gnu.org/wiki/InstallingGCC
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/90000] New: Compile-time hog w/ impossible asm constraints on powerpc
Date: Mon, 08 Apr 2019 02:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90000
Bug ID: 90000
Summary: Compile-time hog w/ impossible asm constraints on
powerpc
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: compile-time-hog, error-recovery
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu
At least gcc-9.0.0-alpha20190331 snapshot (r270048) and gcc 8.2 take indefinite
time when compiling gcc/testsuite/gcc.target/powerpc/pr60032.c w/ -msoft-float:
% timeout 60 powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20190331 -msoft-float -c
gcc/testsuite/gcc.target/powerpc/pr60032.c
gcc/testsuite/gcc.target/powerpc/pr60032.c: In function 'foo':
gcc/testsuite/gcc.target/powerpc/pr60032.c:10:3: error: impossible constraint
in 'asm'
10 | __asm__ ("#" : "=d" (fr1));
| ^~~~~~~
gcc/testsuite/gcc.target/powerpc/pr60032.c:13:1: error: 31 cannot be used in
asm here
13 | }
| ^
gcc/testsuite/gcc.target/powerpc/pr60032.c:13:1: error: 31 cannot be used in
asm here
zsh: exit 124 timeout 60 powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20190331
-msoft-float -c
13.18% cc1 [.] note_stores
12.19% cc1 [.] rtx_equal_p
7.99% cc1 [.] set_of_1
7.72% cc1 [.] rs6000_stack_info
7.51% cc1 [.] process_bb_lives
7.26% cc1 [.] set_of
4.27% cc1 [.] refers_to_regno_p
4.18% cc1 [.] update_reg_eliminate
4.10% cc1 [.] reg_overlap_mentioned_p
3.74% cc1 [.] find_regno_note
3.14% cc1 [.] lra_assign
2.80% cc1 [.] lra_create_live_ranges_1
2.80% cc1 [.] resize_reg_info
2.73% cc1 [.] bitmap_bit_p
2.15% cc1 [.] lra_constraints
1.96% cc1 [.] lra_spill
It actually might be a duplicate of some existing PR. I believe the case of LRA
doing some unnecessary work after an unrecoverable error has been reported
already, though I cannot easily find where.
>From gcc-bugs-return-639926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 04:00:26 2019
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Subject: [Bug target/89945] [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
Date: Mon, 08 Apr 2019 04:00:00 -0000
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--- Comment #4 from uros at gcc dot gnu.org ---
Author: uros
Date: Mon Apr 8 03:59:50 2019
New Revision: 270196
URL: https://gcc.gnu.org/viewcvs?rev=270196&root=gcc&view=rev
Log:
PR target/89945
* config/i386/i386.md (anddi_1 to andsi_1_zext splitter):
Avoid calling gen_lowpart with SYMBOL_REF and LABEL_REF operand.
testsuite/ChangeLog:
PR target/89945
* gcc.target/i386/pr89945.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr89945.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/i386/i386.md
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 04:46:43 2019
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Subject: [Bug target/90001] New: Compile-time hog in swing modulo scheduler
Date: Mon, 08 Apr 2019 04:46:00 -0000
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Bug ID: 90001
Summary: Compile-time hog in swing modulo scheduler
Product: gcc
Version: 9.0
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Keywords: compile-time-hog
Severity: normal
Priority: P3
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Target: powerpc-*-linux-gnu
At least gcc-9.0.0-alpha20190407 (r270192), 8.2, 7.3, 6.3 take inordinate time
when compiling the following testcase reduced from
libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-loop-1.c w/ -O1
-fmodulo-sched -funroll-all-loops:
% time powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20190407 -O1 -fmodulo-sched
-funroll-all-loops -c parallel-loop-1.c -ftime-report
Time variable usr sys wall
GGC
phase setup : 0.00 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
1582 kB ( 33%)
phase opt and generate : 17.22 (100%) 0.00 ( 0%) 17.23 (100%)
3076 kB ( 64%)
trivially dead code : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
tree SSA incremental : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
60 kB ( 1%)
dominator optimization : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
25 kB ( 1%)
complete unrolling : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
175 kB ( 4%)
tree STMT verifier : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
CSE : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
17 kB ( 0%)
dead store elim1 : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
79 kB ( 2%)
web : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
0 kB ( 0%)
sms modulo scheduling : 17.17 (100%) 0.00 ( 0%) 17.17 (100%)
50 kB ( 1%)
integrated RA : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
815 kB ( 17%)
rename registers : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
6 kB ( 0%)
verify RTL sharing : 0.01 ( 0%) 0.00 ( 0%) 0.00 ( 0%)
0 kB ( 0%)
TOTAL : 17.22 0.00 17.23
4844 kB
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.
powerpc-e300c3-linux-gnu-gcc-9.0.0-alpha20190407 -O1 -fmodulo-sched -c
17.23s user 0.01s system 99% cpu 17.237 total
99.95% cc1 [.] longest_simple_path
0.03% cc1 [.] create_ddg_all_sccs
0.03% cc1 [.] memcpy@plt
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Subject: [Bug target/90001] Compile-time hog in swing modulo scheduler
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--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
int a[1500];
float b[10][15][10];
void
f7_none_none (void)
{
unsigned int v1, v3;
unsigned long long v2;
for (v1 = 0; v1 < 20; v1 += 2)
for (v2 = 0x7fffffffffffffffLL + 16ULL;
v2 > 0x7fffffffffffffffLL - 29ULL; v2 -= 3)
for (v3 = 10; v3 > 0; v3--)
b[v1 >> 1][(v2 - 0x7fffffffffffffffLL + 64) / 3 - 12][v3 - 1] += 5.5;
}
>From gcc-bugs-return-639929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 05:27:41 2019
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Subject: [Bug fortran/90002] New: ICE: free_expr0(): Bad expr type
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Bug ID: 90002
Summary: ICE: free_expr0(): Bad expr type
Product: gcc
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gfortran-9.0.0-alpha20190407 snapshot (r270192), 8.2, 7.3, 6.3, 5.5 all ICE
when compiling the following testcase w/ -fcoarray=:
module pc
integer, dimension(1) :: zw[1:1,1:*]
end module pc
% powerpc-e300c3-linux-gnu-gfortran-9.0.0-alpha20190407 -fcoarray=single -c
kebhpdzh.f90
f951: internal compiler error: free_expr0(): Bad expr type
0x792f12 gfc_internal_error(char const*, ...)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/error.c:1363
0x793b47 free_expr0
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/expr.c:502
0x793b8d gfc_free_expr(gfc_expr*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/expr.c:523
0x793b8d gfc_free_expr(gfc_expr*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/expr.c:519
0x760479 gfc_free_array_spec(gfc_array_spec*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/array.c:329
0x760479 gfc_free_array_spec(gfc_array_spec*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/array.c:320
0x830b0b gfc_free_symbol(gfc_symbol*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/symbol.c:3073
0x830b0b gfc_free_symbol(gfc_symbol*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/symbol.c:3067
0x830cf3 free_sym_tree
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/symbol.c:3910
0x830cea free_sym_tree
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/symbol.c:3908
0x8309c1 gfc_free_namespace(gfc_namespace*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/symbol.c:4048
0x8309c1 gfc_free_namespace(gfc_namespace*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/symbol.c:4032
0x830fc6 gfc_symbol_done_2()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/symbol.c:4097
0x7ce2c8 gfc_done_2()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/misc.c:267
0x7e7b59 clean_up_modules
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/parse.c:6094
0x7f2214 translate_all_program_units
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/parse.c:6157
0x7f2214 gfc_parse_file()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/parse.c:6337
0x84019e gfc_be_parse_file
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/fortran/f95-lang.c:204
(While my target here is powerpc, the ICE is not target-specific.)
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Subject: [Bug target/89945] [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
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--- Comment #5 from uros at gcc dot gnu.org ---
Author: uros
Date: Mon Apr 8 05:33:01 2019
New Revision: 270197
URL: https://gcc.gnu.org/viewcvs?rev=270197&root=gcc&view=rev
Log:
PR target/89945
* config/i386/i386.md (anddi_1 to andsi_1_zext splitter):
Avoid calling gen_lowpart with SYMBOL_REF and LABEL_REF operand.
testsuite/ChangeLog:
PR target/89945
* gcc.target/i386/pr89945.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr89945.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/i386/i386.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #0)
> Therefore I suggest we don't use rep-scasb for inline strlen anymore by
> default (we currently do at -Os).
According to https://stackoverflow.com/q/55563598/1918193 , we also do at -O1.
>From gcc-bugs-return-639932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 06:06:23 2019
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Subject: [Bug target/89945] [7/8/9 Regression] ICE in gen_lowpart_general, at rtlhooks.c:63
Date: Mon, 08 Apr 2019 06:06:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed everywhere.
>From gcc-bugs-return-639933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 06:37:34 2019
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Subject: [Bug target/89623] Can't build mips-wrs-vxworks cross-compiler
Date: Mon, 08 Apr 2019 06:37:00 -0000
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--- Comment #1 from paulhua at gcc dot gnu.org ---
Author: paulhua
Date: Mon Apr 8 06:37:00 2019
New Revision: 270198
URL: https://gcc.gnu.org/viewcvs?rev=270198&root=gcc&view=rev
Log:
2019-04-08 Chenghua Xu <paul.hua.gm@gmail.com>
gcc/
PR target/89623
* config/mips/mips.opt (LOONGSON_EXT2): Use Var instead of
Mask.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/mips/mips.opt
>From gcc-bugs-return-639934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 06:39:03 2019
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Subject: [Bug c++/90003] New: internal compiler error: in tsubst_decl, at cp/pt.c:13783
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Bug ID: 90003
Summary: internal compiler error: in tsubst_decl, at
cp/pt.c:13783
Product: gcc
Version: 9.0
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Created attachment 46096
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46096&action=edit
preprocessed source file
I've got an ICE when compiling with gcc-9 [GNU C++17 (FreeBSD Ports Collection)
version 9.0.1 20190303]
In the following you see the compiler output. I attached the preprocessed file.
Using built-in specs.
COLLECT_GCC=/usr/local/bin/g++9
Target: x86_64-portbld-freebsd12.0
Configured with:
/wrkdirs/usr/ports/lang/gcc9-devel/work/gcc-9-20190303/configure
--with-build-config=bootstrap-debug --disable-nls
--enable-gnu-indirect-function --l$
bdir=/usr/local/lib/gcc9 --libexecdir=/usr/local/libexec/gcc9
--program-suffix=9 --with-as=/usr/local/bin/as --with-gmp=/usr/local
--with-gxx-include-dir=/usr/local/l$
b/gcc9/include/c++/ --with-ld=/usr/local/bin/ld --with-pkgversion='FreeBSD
Ports Collection' --with-system-zlib --enable-languages=c,c++,objc,fortran
--prefix=/usr/loc
al --localstatedir=/var --mandir=/usr/local/man
--infodir=/usr/local/share/info/gcc9 --build=x86_64-portbld-freebsd12.0
Thread model: posix
gcc version 9.0.1 20190303 (experimental) (FreeBSD Ports Collection)
COLLECT_GCC_OPTIONS='-D' 'SEQAN3_HAS_BZIP2=1' '-D' 'SEQAN3_HAS_ZLIB=1' '-I'
'/home/mi/rmaerker/workspace/build/seqan3-unit/vendor/googletest/googletest/include'
'-I' '
/home/mi/rmaerker/workspace/seqan3/test/include' '-I'
'/home/mi/rmaerker/workspace/seqan3/include' '-isystem'
'/home/mi/rmaerker/workspace/seqan3/submodules/sdsl-lite/
include' '-isystem'
'/home/mi/rmaerker/workspace/seqan3/submodules/range-v3/include' '-isystem'
'/home/mi/rmaerker/workspace/seqan3/submodules/lemon/include' '-isystem
' '/home/mi/rmaerker/workspace/seqan3/submodules/cereal/include' '-std=c++2a'
'-g' '-Wpedantic' '-Wall' '-Wextra' '-save-temps' '-v' '-Werror' '-fconcepts'
'-v' '-o' '
CMakeFiles/global_affine_unbanded_test.dir/global_affine_unbanded_test.cpp.o'
'-c' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc9/gcc/x86_64-portbld-freebsd12.0/9.0.1/cc1plus -E -quiet
-v -v -I
/home/mi/rmaerker/workspace/build/seqan3-unit/vendor/googletest/googletest/inc
lude -I /home/mi/rmaerker/workspace/seqan3/test/include -I
/home/mi/rmaerker/workspace/seqan3/include -D SEQAN3_HAS_BZIP2=1 -D
SEQAN3_HAS_ZLIB=1 -isystem /home/mi/rmae
rker/workspace/seqan3/submodules/sdsl-lite/include -isystem
/home/mi/rmaerker/workspace/seqan3/submodules/range-v3/include -isystem
/home/mi/rmaerker/workspace/seqan3/
submodules/lemon/include -isystem
/home/mi/rmaerker/workspace/seqan3/submodules/cereal/include
/home/mi/rmaerker/workspace/seqan3/test/unit/alignment/pairwise/global_a
ffine_unbanded_test.cpp -mtune=generic -march=x86-64 -std=c++2a -Wpedantic
-Wall -Wextra -Werror -fconcepts -g -fworking-directory -fpch-preprocess -o
global_affine_un
banded_test.ii
ignoring nonexistent directory
"/usr/local/lib/gcc9/gcc/x86_64-portbld-freebsd12.0/9.0.1/include-fixed"
ignoring nonexistent directory
"/usr/local/lib/gcc9/gcc/x86_64-portbld-freebsd12.0/9.0.1/../../../../../x86_64-portbld-freebsd12.0/include"
#include "..." search starts here:
#include <...> search starts here:
/home/mi/rmaerker/workspace/build/seqan3-unit/vendor/googletest/googletest/include
/home/mi/rmaerker/workspace/seqan3/test/include
/home/mi/rmaerker/workspace/seqan3/include
/home/mi/rmaerker/workspace/seqan3/submodules/sdsl-lite/include
/home/mi/rmaerker/workspace/seqan3/submodules/range-v3/include
/home/mi/rmaerker/workspace/seqan3/submodules/lemon/include
/home/mi/rmaerker/workspace/seqan3/submodules/cereal/include
[25/1229]
/usr/local/lib/gcc9/include/c++/
/usr/local/lib/gcc9/include/c++//x86_64-portbld-freebsd12.0
/usr/local/lib/gcc9/include/c++//backward
/usr/local/lib/gcc9/gcc/x86_64-portbld-freebsd12.0/9.0.1/include
/usr/local/include
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-D' 'SEQAN3_HAS_BZIP2=1' '-D' 'SEQAN3_HAS_ZLIB=1' '-I'
'/home/mi/rmaerker/workspace/build/seqan3-unit/vendor/googletest/googletest/include'
'-I' $
/home/mi/rmaerker/workspace/seqan3/test/include' '-I'
'/home/mi/rmaerker/workspace/seqan3/include' '-isystem'
'/home/mi/rmaerker/workspace/seqan3/submodules/sdsl-lite$
include' '-isystem'
'/home/mi/rmaerker/workspace/seqan3/submodules/range-v3/include' '-isystem'
'/home/mi/rmaerker/workspace/seqan3/submodules/lemon/include' '-isyste$
' '/home/mi/rmaerker/workspace/seqan3/submodules/cereal/include' '-std=c++2a'
'-g' '-Wpedantic' '-Wall' '-Wextra' '-save-temps' '-v' '-Werror' '-fconcepts'
'-v' '-o' $
CMakeFiles/global_affine_unbanded_test.dir/global_affine_unbanded_test.cpp.o'
'-c' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc9/gcc/x86_64-portbld-freebsd12.0/9.0.1/cc1plus
-fpreprocessed global_affine_unbanded_test.ii -quiet -dumpbase
global_affine_unbanded_test.cpp -$
tune=generic -march=x86-64 -auxbase-strip
CMakeFiles/global_affine_unbanded_test.dir/global_affine_unbanded_test.cpp.o -g
-Wpedantic -Wall -Wextra -Werror -std=c++2a $
version -fconcepts -o global_affine_unbanded_test.s
GNU C++17 (FreeBSD Ports Collection) version 9.0.1 20190303 (experimental)
(x86_64-portbld-freebsd12.0)
compiled by GNU C version 9.0.1 20190303 (experimental), GMP version
6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++17 (FreeBSD Ports Collection) version 9.0.1 20190303 (experimental)
(x86_64-portbld-freebsd12.0)
compiled by GNU C version 9.0.1 20190303 (experimental), GMP version
6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: ff74f51a023eb9ca9c177d545bd91205
In file included from
/home/mi/rmaerker/workspace/seqan3/include/seqan3/alignment/pairwise/align_pairwise.hpp:24,
from
/home/mi/rmaerker/workspace/seqan3/test/unit/alignment/pairwise/global_affine_unbanded_test.cpp:13:
/home/mi/rmaerker/workspace/seqan3/include/seqan3/alignment/pairwise/alignment_configurator.hpp:
In instantiation of 'seqan3::detail::alignment_configurator::c[0/1229]
_edit_distance(const config_t&) [with function_wrapper_t =
std::function<seqan3::alignment_result<seqan3::detail::alignment_result_value_type<unsigned
int, int, seqan3
::alignment_coordinate, seqan3::alignment_coordinate>
>(std::vector<seqan3::dna4>&, std::vector<seqan3::dna4>&)>; config_t =
seqan3::configuration<seqan3::align_cfg::$
ode<seqan3::detail::global_alignment_type>,
seqan3::align_cfg::gap<seqan3::gap_scheme<signed char> >,
seqan3::align_cfg::aligned_ends<seqan3::end_gaps<seqan3::front_e$
d_first<std::integral_constant<bool, true> >,
seqan3::back_end_first<std::integral_constant<bool, true> >,
seqan3::front_end_second<std::integral_constant<bool, false$
>, seqan3::back_end_second<std::integral_constant<bool, false> > > >,
seqan3::align_cfg::scoring<seqan3::nucleotide_scoring_scheme<signed char> >,
seqan3::align_cfg:$
result<seqan3::detail::with_front_coordinate_type> >]::<lambda(auto:36)> [with
auto:36 = std::integral_constant<bool, true>]':
/home/mi/rmaerker/workspace/seqan3/include/seqan3/alignment/pairwise/alignment_configurator.hpp:400:42:
required from 'static constexpr function_wrapper_t seqan3::d$
tail::alignment_configurator::configure_edit_distance(const config_t&) [with
function_wrapper_t =
std::function<seqan3::alignment_result<seqan3::detail::alignment_res$
lt_value_type<unsigned int, int, seqan3::alignment_coordinate,
seqan3::alignment_coordinate> >(std::vector<seqan3::dna4>&,
std::vector<seqan3::dna4>&)>; config_t = se$
an3::configuration<seqan3::align_cfg::mode<seqan3::detail::global_alignment_type>,
seqan3::align_cfg::gap<seqan3::gap_scheme<signed char> >,
seqan3::align_cfg::aligne$
_ends<seqan3::end_gaps<seqan3::front_end_first<std::integral_constant<bool,
true> >, seqan3::back_end_first<std::integral_constant<bool, true> >,
seqan3::front_end_se$
ond<std::integral_constant<bool, false> >,
seqan3::back_end_second<std::integral_constant<bool, false> > > >,
seqan3::align_cfg::scoring<seqan3::nucleotide_scoring_sc$
eme<signed char> >,
seqan3::align_cfg::result<seqan3::detail::with_front_coordinate_type> >]'
/home/mi/rmaerker/workspace/seqan3/include/seqan3/alignment/pairwise/alignment_configurator.hpp:324:75:
required from 'static constexpr auto seqan3::detail::alignme$
t_configurator::configure(const config_t&) [with sequences_t =
ranges::single_view<std::tuple<std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> >&, std::vector<s$
qan3::dna4, std::allocator<seqan3::dna4> >&> >; config_t =
seqan3::configuration<seqan3::align_cfg::mode<seqan3::detail::global_alignment_type>,
seqan3::align_cfg::ga$
<seqan3::gap_scheme<signed char> >,
seqan3::align_cfg::aligned_ends<seqan3::end_gaps<seqan3::front_end_first<std::integral_constant<bool,
true> >, seqan3::back_end_fi$
st<std::integral_constant<bool, true> >,
seqan3::front_end_second<std::integral_constant<bool, false> >,
seqan3::back_end_second<std::integral_constant<bool, false> >
> >, seqan3::align_cfg::scoring<seqan3::nucleotide_scoring_scheme<signed char> >, seqan3::align_cfg::result<seqan3::detail::with_front_coordinate_type> >]'
/home/mi/rmaerker/workspace/seqan3/include/seqan3/alignment/pairwise/align_pairwise.hpp:149:80:
required from 'constexpr auto seqan3::align_pairwise(sequence_t&&, c$
nst alignment_config_t&) [with sequence_t =
ranges::single_view<std::tuple<std::vector<seqan3::dna4,
std::allocator<seqan3::dna4> >&, std::vector<seqan3::dna4, std::al
locator<seqan3::dna4> >&> >; alignment_config_t =
seqan3::configuration<seqan3::align_cfg::mode<seqan3::detail::global_alignment_type>,
seqan3::align_cfg::gap<seqan3::
gap_scheme<signed char> >,
seqan3::align_cfg::aligned_ends<seqan3::end_gaps<seqan3::front_end_first<std::integral_constant<bool,
true> >, seqan3::back_end_first<std::i
ntegral_constant<bool, true> >,
seqan3::front_end_second<std::integral_constant<bool, false> >,
seqan3::back_end_second<std::integral_constant<bool, false> > > >, seqa
n3::align_cfg::scoring<seqan3::nucleotide_scoring_scheme<signed char> >,
seqan3::align_cfg::result<seqan3::detail::with_front_coordinate_type> >]'
/home/mi/rmaerker/workspace/seqan3/include/seqan3/alignment/pairwise/align_pairwise.hpp:137:26:
required from 'constexpr auto seqan3::align_pairwise(sequence_t&&, co
nst alignment_config_t&) [with sequence_t =
std::tuple<std::vector<seqan3::dna4, std::allocator<seqan3::dna4> >&,
std::vector<seqan3::dna4, std::allocator<seqan3::dna4
> >&>; alignment_config_t = seqan3::configuration<seqan3::align_cfg::mode<seqan3::detail::global_alignment_type>, seqan3::align_cfg::gap<seqan3::gap_scheme<signed char
> >, seqan3::align_cfg::aligned_ends<seqan3::end_gaps<seqan3::front_end_first<std::integral_constant<bool, true> >, seqan3::back_end_first<std::integral_constant<bool,
true> >, seqan3::front_end_second<std::integral_constant<bool, false> >,
seqan3::back_end_second<std::integral_constant<bool, false> > > >,
seqan3::align_cfg::scoring
<seqan3::nucleotide_scoring_scheme<signed char> >,
seqan3::align_cfg::result<seqan3::detail::with_front_coordinate_type> >]'
/home/mi/rmaerker/workspace/seqan3/test/unit/alignment/pairwise/global_affine_unbanded_test.cpp:89:36:
required from 'void gtest_case_global_affine_unbanded_::begin_
position<gtest_TypeParam_>::TestBody() [with gtest_TypeParam_ = param<(&
seqan3::test::alignment::fixture::semi_global::affine::unbanded::dna4_02)>]'
/home/mi/rmaerker/workspace/seqan3/test/unit/alignment/pairwise/global_affine_unbanded_test.cpp:81:621:
required from here
/home/mi/rmaerker/workspace/seqan3/include/seqan3/alignment/pairwise/alignment_configurator.hpp:363:14:
internal compiler error: in tsubst_decl, at cp/pt.c:13783
363 | auto align_ends_cfg = cfg.template
value_or<align_cfg::aligned_ends>(free_ends_none);
| ^~~~~~~~~~~~~~
>From gcc-bugs-return-639935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 06:39:40 2019
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From: "paul.hua.gm at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89623] Can't build mips-wrs-vxworks cross-compiler
Date: Mon, 08 Apr 2019 06:39:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 9.0
X-Bugzilla-Keywords:
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Paul Hua <paul.hua.gm at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |paul.hua.gm at gmail dot com
--- Comment #2 from Paul Hua <paul.hua.gm at gmail dot com> ---
fixed on trunk.
>From gcc-bugs-return-639936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:00:41 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #31 from Martin Liška <marxin at gcc dot gnu.org> ---
> But if using "--enable-lto" and "-fno-strict-aliasing", the issue cannot be
> solved. In order to solve the issue, besides those options,
> “__attribute__((noipa))†has to be added to the uv_unref(uv_handle_t*)
> function. So you recommend this solution, right?
No, with -fno-strict-aliasing one should not need the noipa attribute. I can
take a look why it's not helping.
>From gcc-bugs-return-639937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:20:35 2019
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
We are no longer increasing alignment of commons (and generally recommend
-fno-common because of that).
>From gcc-bugs-return-639938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:27:23 2019
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Subject: [Bug c++/89994] [8 Regression] ICE (segfault) in compare_ics
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |aoliva at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
It's rejected on trunk since r268606.
>From gcc-bugs-return-639939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:29:30 2019
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Subject: [Bug c++/89994] [8 Regression] ICE (segfault) in compare_ics
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
The ICE is much older that GCC-8:
acafca510c97652f(09 Oct 2014 07:40): [took: 2.880s] result: OK
pr89994.cc:18:21: error: parameter ‘<anonymous>’ includes reference to array of
unknown bound ‘const long int []’
b(const long (&)[]);
^
pr89994.cc:23:16: internal compiler error: Segmentation fault
blaspp<1> k({4})
^
>From gcc-bugs-return-639940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:33:14 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I see the expected result when replacing '-0.0' with '0.0'.
Well, negative zero should be equal to the positive one according to standard.
>From gcc-bugs-return-639943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:34:52 2019
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Subject: [Bug debug/88882] gcc generates wrong debug information at -O1
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Bug 88882 depends on bug 89892, which changed state.
Bug 89892 Summary: gcc generates wrong debug information at -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89892
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Resolution|--- |FIXED
>From gcc-bugs-return-639941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:34:37 2019
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Subject: [Bug middle-end/89977] missing -Wstringop-overflow with an out-of-bounds int128_t range
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JunMa <JunMa at linux dot alibaba.com> changed:
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--- Comment #1 from JunMa <JunMa at linux dot alibaba.com> ---
in function f, the conversion of stmt _1 = (long unsigned int) n_3 is
extending, while in function g, the conversion of stmt _1 = (long unsigned
int) n_3 is truncating.
For integer type truncation, gcc compute the range of target only if the range
size of source is less than what the precision of the target type can
represent.
I think this can be relaxed when the target type of truncation is unsigned.
>From gcc-bugs-return-639942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:34:52 2019
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Subject: [Bug debug/89892] gcc generates wrong debug information at -O2
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
Known to fail| |8.3.0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug debug/89905] gcc generates wrong debug information at -Og
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89905
Bug 89905 depends on bug 89892, which changed state.
Bug 89892 Summary: gcc generates wrong debug information at -O2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89892
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-639945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:38:32 2019
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Subject: [Bug d/89432] FAIL: libphobos.unittests/druntime/{static,shared}/core.time on CentOS 5.11, Linux 2.6.18
Date: Mon, 08 Apr 2019 07:38:00 -0000
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
The original makefile set the variable with:
ifeq ($(OS),linux)
old_kernel:=$(shell [ "$$(uname -r | cut -d'-' -f1)" \< "2.6.39" ] && echo
1)
ifeq ($(old_kernel),1)
UDFLAGS+=-version=Linux_Pre_2639
endif
endif
>From gcc-bugs-return-639946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:41:36 2019
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzg5OTg3XSBJQ0Ugb24gR0NDIHRydW5rIGFuZCBHQ0Mg?= =?UTF-8?B?OCBvbiBhcm0tbm9uZS1saW51eC1nbnVlYWJpaGYgdGFyZ2V0IHdpdGgg4oCc?= =?UTF-8?B?LU8x4oCdIG9wdGlvbg==?Date: Mon, 08 Apr 2019 07:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Target| |arm-none-linux-gnueabihf
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-08
Component|middle-end |fortran
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can't reproduce. Can you please add -v to the compiler commandline and paste
the output again?
Btw, I get
> ./f951 -quiet t.f90 -O
t.f90:2:32:
2 | k = transfer (transfer (e, e), 1)
| 1
Error: ‘SOURCE’ argument of ‘TRANSFER’ intrinsic at (1) must not be a PROCEDURE
so for me it is rejected (r270165).
>From gcc-bugs-return-639947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:43:15 2019
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Component|c |c++
Severity|normal |enhancement
>From gcc-bugs-return-639948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:48:48 2019
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Subject: [Bug fortran/90002] ICE: free_expr0(): Bad expr type
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.8 up to trunk (9.0).
>From gcc-bugs-return-639949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:49:29 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is
std::pow<double> (__x=..., __y=@0x7fffffffdcb8: 0.5)
at /home/space/rguenther/install/gcc-9.0/include/c++/9.0.1/complex:1027
(gdb) l
1022 {
1023 #if ! _GLIBCXX_USE_C99_COMPLEX
1024 if (__x == _Tp())
1025 return _Tp();
1026 #endif
1027 if (__x.imag() == _Tp() && __x.real() > _Tp())
1028 return pow(__x.real(), __y);
where __x.imag () == _Tp() says true for -0.0 == 0.0. This means
std::pow will return the same values for r + -0.0i and r + 0.0i,
not sure if that is allowed by the C++ standard.
>From gcc-bugs-return-639950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:53:55 2019
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Subject: [Bug target/89877] [ARC] miscompilation due to missing cc clobber in longlong.h: add_ssaaaa()/sub_ddmmss()
Date: Mon, 08 Apr 2019 07:53:00 -0000
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--- Comment #4 from Claudiu Zissulescu <claziss at gmail dot com> ---
Backported to gcc 8 branch revision 270200.
>From gcc-bugs-return-639951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 07:54:14 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 07:54:00 -0000
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> The issue is
>
> std::pow<double> (__x=..., __y=@0x7fffffffdcb8: 0.5)
> at /home/space/rguenther/install/gcc-9.0/include/c++/9.0.1/complex:1027
> (gdb) l
> 1022 {
> 1023 #if ! _GLIBCXX_USE_C99_COMPLEX
> 1024 if (__x == _Tp())
> 1025 return _Tp();
> 1026 #endif
> 1027 if (__x.imag() == _Tp() && __x.real() > _Tp())
> 1028 return pow(__x.real(), __y);
>
> where __x.imag () == _Tp() says true for -0.0 == 0.0. This means
> std::pow will return the same values for r + -0.0i and r + 0.0i,
> not sure if that is allowed by the C++ standard.
If it does not allow it, then adding copysign is needed.
>From gcc-bugs-return-639952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:03:03 2019
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Subject: [Bug middle-end/89992] Vectorizer is sensitive to guessed profile
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-08
CC| |hubicka at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Summary|Vectorizer is very |Vectorizer is sensitive to
|sensitive to function calls |guessed profile
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's simply that inlining makes the guessed profile not consider the loop worth
optimizing for speed. Part of that is because the loop ends up in main()
which we know is executed exactly once and bb->count is less than the entry
block count so we hit
maybe_hot_count_p (struct function *fun, profile_count count)
{
...
if (node->frequency == NODE_FREQUENCY_EXECUTED_ONCE
&& count < (ENTRY_BLOCK_PTR_FOR_FN (fun)->count.apply_scale (2, 3)))
return false;
this is probably due to predictors saying that
if (__eax <= 6)
return 0; // return from main
is likely (it gets 66% hit predicted). The foo() != 0 gets even probability
and the following == 230 test gets only 11% probability to hit.
The "fun" of static profile... (and doing benchmarking in main()).
But it doesn't have anything to do with the vectorizer or calls.
>From gcc-bugs-return-639953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:04:46 2019
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Subject: [Bug c++/89994] [8 Regression] ICE (segfault) in compare_ics
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-639954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:04:55 2019
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Subject: [Bug middle-end/89977] missing -Wstringop-overflow with an out-of-bounds int128_t range
Date: Mon, 08 Apr 2019 08:04:00 -0000
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--- Comment #2 from JunMa <JunMa at linux dot alibaba.com> ---
After a bit more thinking, the behavior of gcc trunk is right. the range of n_3
in truncation from int128 to long unsigned int equal to the range of long
unsigned int. for example: if n_3 = 0x100000000, then _1 is 0 which is less
than 7.
so this is not a bug.
>From gcc-bugs-return-639955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:08:15 2019
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Subject: [Bug middle-end/89977] missing -Wstringop-overflow with an out-of-bounds int128_t range
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--- Comment #3 from JunMa <JunMa at linux dot alibaba.com> ---
(In reply to JunMa from comment #2)
> After a bit more thinking, the behavior of gcc trunk is right. the range of
> n_3 in truncation from int128 to long unsigned int equal to the range of
> long unsigned int. for example: if n_3 = 0x100000000, then _1 is 0 which is
> less than 7.
>
> so this is not a bug.
sorry, when n_3 = 0x1000 00000000 00000000, _1 is 0.
>From gcc-bugs-return-639956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:09:47 2019
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Subject: [Bug middle-end/89998] [9 regression] AVR ICE: verify_gimple failed in printf-return-value
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's another dup for this. But I wonder why it works in GCC 8 (maybe it
only works with -fno-checking after all).
So, can you try if GCC 8 fails the same way with -fchecking?
>From gcc-bugs-return-639957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:14:38 2019
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Subject: [Bug c++/89914] [9 Regression] ICE in nothrow_spec_p, at cp/except.c:1238
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--- Comment #5 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Mon Apr 8 08:13:50 2019
New Revision: 270201
URL: https://gcc.gnu.org/viewcvs?rev=270201&root=gcc&view=rev
Log:
/cp
2019-04-08 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/89914
* semantics.c (trait_expr_value): Don't use TYPE_NOTHROW_P
when maybe_instantiate_noexcept fails.
(classtype_has_nothrow_assign_or_copy_p): Likewise.
* method.c (implicitly_declare_fn): Avoid passing error_mark_node
to build_exception_variant.
/testsuite
2019-04-08 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/89914
* g++.dg/ext/has_nothrow_constructor-3.C: New.
Added:
trunk/gcc/testsuite/g++.dg/ext/has_nothrow_constructor-3.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/method.c
trunk/gcc/cp/semantics.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-639958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:15:04 2019
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Subject: [Bug c++/89914] [9 Regression] ICE in nothrow_spec_p, at cp/except.c:1238
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
>From gcc-bugs-return-639959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:19:16 2019
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Subject: [Bug middle-end/89992] Vectorizer is sensitive to guessed profile
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> It's simply that inlining makes the guessed profile not consider the loop
> worth
> optimizing for speed. Part of that is because the loop ends up in main()
> which we know is executed exactly once and bb->count is less than the entry
> block count so we hit
>
> maybe_hot_count_p (struct function *fun, profile_count count)
> {
> ...
> if (node->frequency == NODE_FREQUENCY_EXECUTED_ONCE
> && count < (ENTRY_BLOCK_PTR_FOR_FN (fun)->count.apply_scale (2,
> 3)))
> return false;
>
> this is probably due to predictors saying that
>
> if (__eax <= 6)
> return 0; // return from main
>
> is likely (it gets 66% hit predicted). The foo() != 0 gets even probability
> and the following == 230 test gets only 11% probability to hit.
>
> The "fun" of static profile... (and doing benchmarking in main()).
>
> But it doesn't have anything to do with the vectorizer or calls.
As Richi says, static probability of calling 'do_test' in main is 3.8%. You can
use __builtin_expect{,_with_probability} if you want to make the path more
probable.
>From gcc-bugs-return-639960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:29:26 2019
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Subject: [Bug c++/90003] internal compiler error: in tsubst_decl, at cp/pt.c:13783
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Is the code valid? Is there a compiler that accepts that?
>From gcc-bugs-return-639961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:34:21 2019
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Subject: [Bug rtl-optimization/90001] Compile-time hog in swing modulo scheduler
Date: Mon, 08 Apr 2019 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc-*-linux-gnu |powerpc-*-linux-gnu
| |powerpc64le-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-08
Component|target |rtl-optimization
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed also on ppc64le (thus likely on any doloop capable target which SMS
needs). Note that SMS is unmaintained.
The issue is that set_recurrence_length is called with a graph with
18662 back-arcs and the longest_simple_path does work on the order
of the graph size because it uses sbitmaps. Using bitmaps doesn't
help here though. I guess the underlying algorithm for
set_recurrence_length simply isn't scalable and needs to be replaced.
>From gcc-bugs-return-639962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:34:59 2019
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Subject: [Bug middle-end/89998] [9 regression] AVR ICE: verify_gimple failed in printf-return-value
Date: Mon, 08 Apr 2019 08:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This has nothing to do with PR89996 and is not AVR specific either.
Following can reproduce it on x86_64-linux:
unsigned int sprintf (char *str, const char *fmt, ...);
int
foo (char *s)
{
return sprintf (s, "foo");
}
and s/unsigned int/unsigned short/ on AVR.
I'll handle it.
>From gcc-bugs-return-639963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:35:59 2019
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90004] New: [graphite] ICE: Segmentation fault (in scop_get_dependences(scop*))
Date: Mon, 08 Apr 2019 08:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90004
Bug ID: 90004
Summary: [graphite] ICE: Segmentation fault (in
scop_get_dependences(scop*))
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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Target: powerpc-*-linux-gnu
gfortran-9.0.0-alpha20190407 snapshot (r270192) ICEs when compiling the
following testcase w/ -O1 -floop-nest-optimize -fwrapv:
subroutine rp (n2, qv)
integer :: qv
integer :: n2(5,5,3,0:qv)
integer :: fi, pj
do fi = 1, 4
do pj = 1, 2
n2(fi,pj,1,0) = 0
n2(fi,pj,2,0) = 0
n2(fi,pj,3,0) = 0
n2(fi,pj,1,qv) = 0
n2(fi,pj,2,qv) = 0
n2(fi,pj,3,qv) = 0
enddo
enddo
do fi = 1, 3
n2(fi,fi,2,0) = 0
n2(fi,fi,2,qv) = 0
enddo
end subroutine rp
% powerpc-e300c3-linux-gnu-gfortran-9.0.0-alpha20190407 -O1
-floop-nest-optimize -fwrapv -c mlsputpr.f90
during GIMPLE pass: graphite
mlsputpr.f90:1:0:
1 | subroutine rp (n2, qv)
|
internal compiler error: Segmentation fault
0xd83f96 crash_signal
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/toplev.c:326
0x14ba478 scop_get_dependences(scop*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/graphite-dependences.c:316
0x14ba9f6 optimize_isl
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/graphite-optimize-isl.c:126
0x14ba9f6 apply_poly_transforms(scop*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/graphite-optimize-isl.c:212
0x14b4be0 graphite_transform_loops()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/graphite.c:468
0x14b5190 graphite_transforms
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/graphite.c:538
0x14b5190 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/graphite.c:615
I have isl 0.21 installed on this machine.
>From gcc-bugs-return-639964-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:51:07 2019
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Subject: [Bug c++/90005] New: No error produced for the wrong type of string used in gcc >= 5.0
Date: Mon, 08 Apr 2019 08:51:00 -0000
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Bug ID: 90005
Summary: No error produced for the wrong type of string used in
gcc >= 5.0
Product: gcc
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Hello,
I have the question regarding the following behaviour of gcc 8.3 (it behaves
the same way from version 5.0 up to 8.3 - when I tested with the
https://gcc.godbolt.org/).
When I compile following program (it has an obvious omission - missing .c_str()
conversion of std::string to char*)
#include <stdio.h>
#include <string>
int main()
{
std::string txt("there");
printf("Hello %s ! \n", txt);
}
On the gcc 4.9 and before - it correctly notifies me with an error like :
<source>: In function 'int main()':
<source>:6:30: error: cannot pass objects of non-trivially-copyable type
'std::string {aka class std::basic_string<char>}' through '...'
printf("Hello %s ! \n", txt);
Compiler returned: 1
However, starting from the gcc 5.0 and above (gcc 8.3 included) - no error is
generated - and the binary is being produced. It obviously prints the garbage
when run ("Hello (`e !"). So lack of the error should be considered as an bug ?
Or maybe do I need to provide some special flag for this error message to
appear and stop the compilation in gcc 5.0 and above ?
Both the gcc <= 4.9 works correctly here (and the newer clang compilers also
point out this error correctly). Can I make the gcc >= 5.0 to generate an error
here with some flag ?
>From gcc-bugs-return-639965-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:52:55 2019
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From: "slyfox at inbox dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90006] New: gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno
Date: Mon, 08 Apr 2019 08:52:00 -0000
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Bug ID: 90006
Summary: gcc loops indefinitely around
vect_get_constant_vectors on -O2 -ftree-slp-vectorize
-fno-math-errno
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
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Reporter: slyfox at inbox dot ru
Target Milestone: ---
Compiler looping on libavcodec/pngenc.c (ffmpeg-4.1) is originally reported atn
https://bugs.gentoo.org/682694.
Here is a minimal reproducer against gcc-8.3.0:
// $ cat bug.c
// Now to reproduce:
// $ /usr/bin/x86_64-pc-linux-gnu-gcc -m32 -O2 -ftree-slp-vectorize
-fno-math-errno -c bug.c -o bug.o -Wall
long int lrint(double x);
int a, b;
union c {
int d;
};
int e() {
int f, g, h;
long i, j, k;
double l, m = b = lrint(0.3127);
a = b >> 16 >> 8 & 255;
((union c *)e)->d = a;
k = m;
h = k >> 16 >> 8 & 255;
((union c *)(e + 4))->d = h;
j = lrint(l);
g = j >> 16 >> 8 & 255;
((union c *)(e + 8))->d = g;
i = lrint(0.292);
f = i >> 16 >> 8 & 255;
((union c *)(e + 12))->d = f;
return 0;
}
$ LANG=C /usr/bin/x86_64-pc-linux-gnu-gcc -m32 -O2 -ftree-slp-vectorize
-fno-math-errno -c bug.c -o bug.o -Wall
bug.c: In function 'e':
bug.c:20:7: warning: 'l' is used uninitialized in this function
[-Wuninitialized]
j = lrint(l);
^~~~~~~~
<hung>
'perf' says looping happens in 'vect_get_constant_vectors':
vec<tree_node*, va_heap, vl_ptr>::length (this=0x7fff0b1593b0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/vec.h:1303
1303 unsigned length (void) const
(gdb) bt
#0 vec<tree_node*, va_heap, vl_ptr>::length (this=0x7fff0b1593b0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/vec.h:1303
#1 vect_get_constant_vectors (op=<optimized out>, slp_node=0x1eaade0,
vec_oprnds=0x7fff0b1593b0, op_num=0, number_of_vectors=1)
at /usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:3741
#2 0x0000000000c74ef8 in vect_get_slp_defs (ops=ops@entry=...,
slp_node=slp_node@entry=0x1eaade0, vec_oprnds=vec_oprnds@entry=0x7fff0b1594b8)
at /usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:3877
#3 0x0000000000c3cfb6 in vectorizable_call (gs=0x7f2fdde4e3f0,
gsi=0x7fff0b159670, vec_stmt=0x7fff0b159590, slp_node=0x1eaade0)
at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-stmts.c:3387
#4 0x0000000000c4dfaf in vect_transform_stmt (stmt=stmt@entry=0x7f2fdde4e3f0,
gsi=gsi@entry=0x7fff0b159670, grouped_store=grouped_store@entry=0x7fff0b15966f,
slp_node=slp_node@entry=0x1eaade0, slp_node_instance=<optimized out>) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-stmts.c:9557
#5 0x0000000000c78a05 in vect_schedule_slp_instance (node=0x1eaade0,
instance=<optimized out>, bst_map=<optimized out>)
at /usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:4214
#6 0x0000000000c787f4 in vect_schedule_slp_instance (node=0x1ea9830,
instance=0x1ea7060, bst_map=0x1eab2c0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:4104
#7 0x0000000000c787f4 in vect_schedule_slp_instance (node=0x1ea9870,
instance=0x1ea7060, bst_map=0x1eab2c0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:4104
#8 0x0000000000c787f4 in vect_schedule_slp_instance (node=0x1ea98b0,
instance=0x1ea7060, bst_map=0x1eab2c0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:4104
#9 0x0000000000c787f4 in vect_schedule_slp_instance (node=0x1ea98f0,
instance=0x1ea7060, bst_map=0x1eab2c0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:4104
#10 0x0000000000c793cb in vect_schedule_slp (vinfo=0x1d05270) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:4283
#11 0x0000000000c7bbc4 in vect_slp_bb (bb=bb@entry=0x7f2fddd08270) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vect-slp.c:3277
#12 0x0000000000c7d5a7 in (anonymous namespace)::pass_slp_vectorize::execute
(this=<optimized out>, fun=0x7f2fdde4c000)
at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/tree-vectorizer.c:978
#13 0x000000000098ca57 in execute_one_pass (pass=0x1cf2ff0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/passes.c:2497
#14 0x000000000098d1c8 in execute_pass_list_1 (pass=0x1cf2ff0) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/passes.c:2586
#15 0x000000000098d1da in execute_pass_list_1 (pass=0x1cf2f90) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/passes.c:2587
#16 0x000000000098d1da in execute_pass_list_1 (pass=0x1cf1110) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/passes.c:2587
#17 0x000000000098d219 in execute_pass_list (fn=0x7f2fdde4c000, pass=<optimized
out>) at /usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/passes.c:2597
#18 0x00000000006e4dbd in cgraph_node::expand (this=0x7f2fdde50000) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/context.h:48
#19 0x00000000006e5e75 in expand_all_functions () at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/cgraphunit.c:2275
#20 symbol_table::compile (this=0x7f2fddd00100) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/cgraphunit.c:2624
#21 0x00000000006e7bda in symbol_table::compile (this=0x7f2fddd00100) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/cgraphunit.c:2717
#22 symbol_table::finalize_compilation_unit (this=0x7f2fddd00100) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/cgraphunit.c:2717
#23 0x0000000000a4ffaa in compile_file () at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/toplev.c:480
#24 0x00000000005af413 in do_compile () at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/toplev.c:2136
#25 toplev::main (this=this@entry=0x7fff0b15aa36, argc=<optimized out>,
argc@entry=19, argv=<optimized out>, argv@entry=0x7fff0b15ab38)
at /usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/toplev.c:2271
#26 0x00000000005b16cb in main (argc=19, argv=0x7fff0b15ab38) at
/usr/src/debug/sys-devel/gcc-8.3.0-r1/gcc-8.3.0/gcc/main.c:39
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Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Have you tried -Wformat ?
>From gcc-bugs-return-639968-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:54:55 2019
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
Date: Mon, 08 Apr 2019 08:54:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |INVALID
--- Comment #32 from Martin Liška <marxin at gcc dot gnu.org> ---
I can confirm it works for me with:
diff --git a/common.gypi b/common.gypi
index 9502e92..3d8f04f 100644
--- a/common.gypi
+++ b/common.gypi
@@ -195,8 +195,8 @@
'ldflags': ['<(pgo_use)'],
},],
['enable_lto=="true"', {
- 'cflags': ['<(lto)'],
- 'ldflags': ['<(lto)'],
+ 'cflags': ['<(lto) -fno-strict-aliasing'],
+ 'ldflags': ['<(lto) -fno-strict-aliasing'],
},],
],
},],
>From gcc-bugs-return-639967-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:54:46 2019
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Subject: [Bug c/90006] gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno
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--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Reproducible on 8.3.0 and today's gcc master built as:
/home/slyfox/dev/git/gcc-native-quick/gcc/xgcc
-B/home/slyfox/dev/git/gcc-native-quick/gcc -v
Reading specs from /home/slyfox/dev/git/gcc-native-quick/gcc/specs
COLLECT_GCC=/home/slyfox/dev/git/gcc-native-quick/gcc/xgcc
COLLECT_LTO_WRAPPER=/home/slyfox/dev/git/gcc-native-quick/gcc/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --enable-languages=c,c++,lto
--disable-bootstrap --with-multilib-list=m64
--prefix=/home/slyfox/dev/git/gcc-native-quick/../gcc-native-quick-installed
--disable-nls CFLAGS='-O1 ' CXXFLAGS='-O1 '
--with-sysroot=/usr/x86_64-HEAD-linux-gnu
Thread model: posix
gcc version 9.0.1 20190408 (experimental) (GCC)
>From gcc-bugs-return-639969-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 08:57:23 2019
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Subject: [Bug middle-end/89998] [7/8/9 regression] ICE: verify_gimple failed in printf-return-value
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P4 |P3
Target Milestone|9.0 |7.5
Summary|[9 regression] AVR ICE: |[7/8/9 regression] ICE:
|verify_gimple failed in |verify_gimple failed in
|printf-return-value |printf-return-value
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think this started with r213951, though that is just a guess, our bisect
seeder gave weird answers.
>From gcc-bugs-return-639970-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 09:01:07 2019
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Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
Date: Mon, 08 Apr 2019 09:01:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
I took back what I took back ;)
The intermediate format file is created from GCDA file and contains information
for multiple source files. So that it does not make sense to
"--preserve-paths"/"--hash-filenames". I'll add data_file field to the JSON
file and close this issue.
>From gcc-bugs-return-639971-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 09:10:36 2019
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Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
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--- Comment #2 from Pawel <pawel.wrobel at nielsen dot com> ---
Hi,
Thanks,
Adding -Wformat indeed show up a waring here :
$ g++ -Wformat main.cpp -o out
main.cpp: In function ‘int main()’:
main.cpp:6:30: warning: format ‘%s’ expects argument of type ‘char*’, but
argument 2 has type ‘std::string* {aka std::basic_string<char>*}’ [-Wformat=]
printf("Hello %s ! \n", txt);
I can make it into an error using the -Werror flag then - however - that seems
to be too strict. In the actual, real-scenario code, I think, I cannot afford
to use the -Werror flag globally - since it will turn many of otherwise
harmless warnings into errors.
Is there a reason why this is considered to be 'just a harmless warning' by
newer(>=5.0) gcc - whereas other gcc(<5.0)/complers consider this a "hard
problem" (doing this omission changes program into printing the complete
garbage, so just a warning seems to be a little too soft there)...
The warning/error message also is so different between gcc versions here..
>From gcc-bugs-return-639973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 09:20:57 2019
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Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
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Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Because GCC allows passing non pods via varargs now. This is an explicit
change due to newer c++ changes.
You could do -Werror=format to get only the format warnings changed to errors.
>From gcc-bugs-return-639974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 09:41:08 2019
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Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
Date: Mon, 08 Apr 2019 09:41:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> Because GCC allows passing non pods via varargs now. This is an explicit
> change due to newer c++ changes.
Right. The C++ standard says:
"Passing a potentially-evaluated argument of class type (Clause 11) having a
non-trivial copy constructor, a non-trivial move constructor, or a non-trivial
destructor, with no corresponding parameter, is conditionally-supported with
implementation-defined semantics."
GCC supports passing a non-trivial type such as std::string to "...", with
implementation-defined semantics. Some other compilers do not support it.
But printf still requires a char* for a %s argument, which is what -Wformat
will warn about. Passing invalid arguments to printf often results in complete
garbage, e.g. printf("%s", &printf). That's not specific to passing a
std::string, it's just how printf works: you need to pass the right arguments.
>From gcc-bugs-return-639975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 09:49:42 2019
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From: "rene.rahn@fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90003] internal compiler error: in tsubst_decl, at cp/pt.c:13783
Date: Mon, 08 Apr 2019 09:49:00 -0000
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--- Comment #2 from rene.rahn@fu-berlin.de ---
Yes, sorry. this works fine with gcc-7 and gcc-8.
I also used multidelta to reduce the preprocessed file.
>From gcc-bugs-return-639976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 09:59:25 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 09:59:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think it's allowed. The standards have very little to say about accuracy of
any mathematical functions, and complex<double>(0, 0.0) == complex<double>(0,
-0.0) is true according to the standard, because +0.0 == -0.0 is true.
>From gcc-bugs-return-639977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:05:25 2019
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzg5OTg3XSBJQ0Ugb24gR0NDIHRydW5rIGFuZCBHQ0Mg?= =?UTF-8?B?OCBvbiBhcm0tbm9uZS1saW51eC1nbnVlYWJpaGYgdGFyZ2V0IHdpdGgg4oCc?= =?UTF-8?B?LU8x4oCdIG9wdGlvbg==?Date: Mon, 08 Apr 2019 10:05:00 -0000
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--- Comment #2 from Srinath Parvathaneni <srinath.parvathaneni at arm dot com> ---
$ ./arm-none-linux-gnueabihf-gfortran test.f90 -S -O1 -v
Using built-in specs.
COLLECT_GCC=./arm-none-linux-gnueabihf-gfortran
Target: arm-none-linux-gnueabihf
Configured with:
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/configure
--with-arch=armv7-a --with-fpu=neon --with-float=hard --with-mode=thumb
--with-isl=/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/build-native-arm-none-linux-gnueabihf/host-tools
--without-cloog --build=arm-none-linux-gnueabihf
--host=arm-none-linux-gnueabihf --target=arm-none-linux-gnueabihf --prefix=/usr
--enable-languages=c,c++,fortran --enable-plugin --enable-gnu-indirect-function
--with-gmp=/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/build-native-arm-none-linux-gnueabihf/host-tools
--with-mpfr=/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/build-native-arm-none-linux-gnueabihf/host-tools
--with-mpc=/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/build-native-arm-none-linux-gnueabihf/host-tools
--with-gnu-ld --with-plugin-ld=ld --with-pkgversion=fsf-trunk.1858
--disable-libsanitizer
Thread model: posix
gcc version 9.0.1 20190404 (experimental) (fsf-trunk.1858)
COLLECT_GCC_OPTIONS='-S' '-O1' '-v' '-mfloat-abi=hard' '-mfpu=neon' '-mthumb'
'-mtls-dialect=gnu' '-march=armv7-a+simd'
/home/sripar01/STP/fsf-8/usr/bin/../libexec/gcc/arm-none-linux-gnueabihf/9.0.1/f951
test.f90 -quiet -dumpbase test.f90 -mfloat-abi=hard -mfpu=neon -mthumb
-mtls-dialect=gnu -march=armv7-a+simd -auxbase test -O1 -version -o test.s
-fintrinsic-modules-path
/home/sripar01/STP/fsf-8/usr/bin/../lib/gcc/arm-none-linux-gnueabihf/9.0.1/finclude
GNU Fortran (fsf-trunk.1858) version 9.0.1 20190404 (experimental)
(arm-none-linux-gnueabihf)
compiled by GNU C version 9.0.1 20190404 (experimental), GMP version
4.3.2, MPFR version 3.1.6, MPC version 1.0.3, isl version
isl-0.18-e8d574175192-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU Fortran2008 (fsf-trunk.1858) version 9.0.1 20190404 (experimental)
(arm-none-linux-gnueabihf)
compiled by GNU C version 9.0.1 20190404 (experimental), GMP version
4.3.2, MPFR version 3.1.6, MPC version 1.0.3, isl version
isl-0.18-e8d574175192-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
during GIMPLE pass: ccp
test.f90:3:0:
3 | end
|
internal compiler error: in fold_convert_loc, at fold-const.c:2552
0x438231 fold_convert_loc(unsigned int, tree_node*, tree_node*)
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/fold-const.c:2552
0x78dfb5 evaluate_stmt
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:1997
0x78eea1 visit_assignment
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:2352
0x7f905b ssa_propagation_engine::simulate_stmt(gimple*)
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-propagate.c:230
0x7f927d ssa_propagation_engine::simulate_block(basic_block_def*)
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-propagate.c:337
0x7fa33b ssa_propagation_engine::ssa_propagate()
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-propagate.c:802
0x787197 do_ssa_ccp
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:2471
0x787197 execute
/tmp/dgboter/bbs/moonshot-dsg-20-armhf--armhf/buildbot/native-glibc-arm-none-linux-gnueabihf/build/src/gcc/gcc/tree-ssa-ccp.c:2515
>From gcc-bugs-return-639978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:08:44 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 10:08:00 -0000
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--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Also isn't it true that this is just a different quadrant of the solution?
That is the answer is correct but which quadrant being selected is different?
That is (a^0.5) actually has two answers where the imaginary part can be
positive or negative? That is they are conjugate of each other.
>From gcc-bugs-return-639979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:11:36 2019
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Subject: [Bug rtl-optimization/90007] New: [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
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gcc-9.0.0-alpha20190407 snapshot (r270192) ICEs when compiling the following
testcase w/ -march=bdver1 (=bdver2) -mfpmath=387 -O1 (-O2, -O3, -Ofast)
-fschedule-insns -fselective-scheduling:
void
qj (int b9, int r9, int k4, int k0, int e7)
{
(void) b9;
(void) r9;
(void) k4;
while (!!k0 == e7 * 1.1)
{
}
}
% x86_64-pc-linux-gnu-gcc-9.0.0-alpha20190407 -march=bdver1 -mfpmath=387 -O1
-fschedule-insns -fselective-scheduling -c nhzbpwxv.c
nhzbpwxv.c: In function 'qj':
nhzbpwxv.c:11:1: error: insn does not satisfy its constraints:
11 | }
| ^
(insn 39 0 0 (set (reg:DF 95)
(float:DF (reg:SI 36 r8 [ e7 ]))) 172 {*floatsidf2}
(expr_list:REG_DEAD (reg:SI 98)
(nil)))
during RTL pass: sched1
nhzbpwxv.c:11:1: internal compiler error: in extract_constrain_insn_cached, at
recog.c:2223
0x66a363 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/rtl-error.c:108
0x66a389 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/rtl-error.c:118
0x6685a6 extract_constrain_insn_cached(rtx_insn*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/recog.c:2223
0x12b020f get_attr_type(rtx_insn*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/config/i386/i386.md:2288
0x12d6805 internal_dfa_insn_code_bdver1(rtx_insn*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/config/i386/i386.md:15343
0x12c4100 dfa_insn_code
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/build/gcc/insn-automata.c:158875
0x12c4100 state_transition(void*, rtx_def*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/build/gcc/insn-automata.c:158890
0xd0b74a estimate_insn_cost
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:4293
0xd17aab get_expr_cost
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:4324
0xd17aab choose_best_insn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:4353
0xd17aab find_best_expr
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:4403
0xd17aab fill_insns
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:5550
0xd17aab schedule_on_fences
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:7368
0xd17aab sel_sched_region_2
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:7506
0xd185e8 sel_sched_region_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:7548
0xd1a111 sel_sched_region(int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:7649
0xd1a111 sel_sched_region(int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:7634
0xd1acc8 run_selective_scheduling()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sel-sched.c:7735
0xcf915d rest_of_handle_sched
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sched-rgn.c:3717
0xcf915d execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/sched-rgn.c:3827
>From gcc-bugs-return-639980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:18:52 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 10:18:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> The issue is
>
> std::pow<double> (__x=..., __y=@0x7fffffffdcb8: 0.5)
> at /home/space/rguenther/install/gcc-9.0/include/c++/9.0.1/complex:1027
> (gdb) l
> 1022 {
> 1023 #if ! _GLIBCXX_USE_C99_COMPLEX
> 1024 if (__x == _Tp())
> 1025 return _Tp();
> 1026 #endif
> 1027 if (__x.imag() == _Tp() && __x.real() > _Tp())
> 1028 return pow(__x.real(), __y);
>
> where __x.imag () == _Tp() says true for -0.0 == 0.0. This means
> std::pow will return the same values for r + -0.0i and r + 0.0i,
> not sure if that is allowed by the C++ standard.
But __x.real() > _Tp() is false here, so that branch isn't taken anyway.
Instead the pow(val, 0.5) result comes from:
_Complex double val = -1.8425031517782417e-07 + -0.0 * I;
_Complex double t = __builtin_clog(val);
double rho = exp(0.5 * __real__ t);
double theta = 0.5 * __imag__ t;
_Complex result = rho * cos(theta) + rho * sin(theta) * I;
__builtin_printf("%f\n", __imag__ result);
>From gcc-bugs-return-639981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:19:17 2019
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From: "pawel.wrobel at nielsen dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
Date: Mon, 08 Apr 2019 10:19:00 -0000
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--- Comment #6 from Pawel <pawel.wrobel at nielsen dot com> ---
Hi,
Thanks for the explanation. Indeed, for example, the clang does not support the
non-POD(ex. std::string) to variadic function - as :
error: cannot pass non-trivial object of type 'std::__cxx11::string' (aka
'basic_string<char>') to variadic function;
>From gcc-bugs-return-639982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:24:45 2019
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Subject: [Bug c++/90003] internal compiler error: in tsubst_decl, at cp/pt.c:13783
Date: Mon, 08 Apr 2019 10:24:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Slightly reduced -std=c++2a -fconcepts:
namespace a {
template <typename> struct b;
template <typename c> using aa = c;
template <typename> bool ab;
struct ac;
template <long, typename> using ad = ac;
template <typename c> class ae { ae(c); };
}
namespace af {
namespace ag { struct ah { typedef int ai; }; }
template <typename, typename, typename, typename, typename = int, typename =
int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int,
typename = int,
typename = int, typename = int, typename = int, typename = int>
struct d { typedef ag::ah e; };
namespace ag {
template <template <typename> class aj>
struct al { template <typename> struct am { typedef aj<int> e; }; };
template <template <typename> class ak> struct an { typedef al<ak> ai; };
template <template <typename> class ak> struct ao { typedef an<ak> e; };
template <typename> struct aq;
template <typename ak, typename ar, typename as, typename at, typename au,
typename av,
typename aw, typename ax, typename ay, typename az, typename ba,
typename bb,
typename bc, typename bd, typename be, typename bf, typename bg,
typename bh,
typename bi, typename f, typename h, typename i, typename bj,
typename j,
typename k, typename l, typename m, typename n, typename bk,
typename bl,
typename bm, typename o, typename bn, typename p, typename q,
typename r,
typename s, typename v, typename bo, typename br, typename bp,
typename bq,
typename bu, typename bs, typename bt, typename bx, typename bv,
typename bw,
typename ca, typename by>
struct aq<d<ak, ar, as, at, au, av, aw, ax, ay, az, ba, bb, bc, bd, be, bf,
bg, bh, bi,
f, h, i, bj, j, k, l, m, n, bk, bl, bm, o, bn, p, q, r, s, v,
bo, br, bp, bq,
bu, bs, bt, bx, bv, bw, ca, by>> { typedef d<ak, bw, ca, by>::e
e; };
template <class bz, typename d> class F { static bool cb() { typedef
typename bz::template am<typename d::ai>::e cc; new cc; } };
template <template <typename> class, typename cd, typename d> class ce {
static bool cb() { F<typename cd::ai, d>::cb; } };
}
}
template <typename ap> concept cf = a::b<ap>::g;
struct {
template <bool> struct ch;
template <typename ci> using cj = ch<cf<ci>>;
template <typename ci> auto operator()(ci &&) noexcept(cj<ci>()) {}
} begin;
template <typename ap> bool ck = requires(ap t) { begin(t); };
template <typename ap> bool cl = ck<ap>;
namespace a::cg {
template <typename e> bool cn = cl<e>;
template <typename e> bool cm = cn<e>;
}
template <typename t, typename> concept dc = requires(t co) { co; };
template <typename> concept cr = a::ab<>;
template <typename cp, cr cq> class K { template <dc<cp>> cq c(); };
namespace cs {
template <typename ct> bool u = a::cg::cm<a::ad<0, ct>>;
template <typename ct> bool cu = u<ct>;
}
template <typename w, typename x> requires cs::cu<a::aa<w>> void y(w, x);
namespace cv::alignment::cw::cx::affine::cy { auto z = [] {}; auto cz = [] {};
auto da = [] {}; auto db = [] {}; }
using namespace cv::alignment::cw;
template <auto> struct dg;
template <typename> class dd;
using de = af::d<dg<cx::affine::cy::z>, dg<cx::affine::cy::cz>,
dg<cx::affine::cy::da>, dg<cx::affine::cy::db>>;
namespace df { template <typename> class H { virtual void dh(); }; }
template <typename di> void df::H<di>::dh() { auto cw = this; auto dj = int{},
dk = cw; y(dk, dj); }
namespace df { typedef af::ag::ao<H>::e dl; }
bool dm = af::ag::ce<dd, df::dl, af::ag::aq<de>::e>::cb;
>From gcc-bugs-return-639983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:27:54 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
Date: Mon, 08 Apr 2019 10:27:00 -0000
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--- Comment #7 from Pawel <pawel.wrobel at nielsen dot com> ---
The "-Werror=format" solution seems to work for me - it triggers the error here
(missing .c_str()) even for the gcc >= 5.0 - leaving all the other, non-related
warnings untouched.
Thanks
>From gcc-bugs-return-639984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:32:21 2019
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzg5OTg3XSBJQ0Ugb24gR0NDIHRydW5rIGFuZCBHQ0Mg?= =?UTF-8?B?OCBvbiBhcm0tbm9uZS1saW51eC1nbnVlYWJpaGYgdGFyZ2V0IHdpdGgg4oCc?= =?UTF-8?B?LU8x4oCdIG9wdGlvbg==?Date: Mon, 08 Apr 2019 10:32:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu.org
--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Can you update to a revision after r270150 and try again?
This looks like an exact dup of PR 89904.
>From gcc-bugs-return-639985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 10:57:48 2019
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Subject: [Bug ipa/89989] missed devirtualization opportunity on final function
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-08
Ever confirmed|0 |1
>From gcc-bugs-return-639988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:12:57 2019
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Subject: [Bug ipa/89989] missed devirtualization opportunity on final function
Date: Mon, 08 Apr 2019 11:12:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Related to PR 65143.
>From gcc-bugs-return-639986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:12:25 2019
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Subject: [Bug c++/78873] Virtual call after conversion to base class pointer is not devirtualized
Date: Mon, 08 Apr 2019 11:12:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Ambroz Bizjak from comment #0)
> But I think it is not valid; the result of the reinterpret_cast does not
> point to a Liar object, so the static_cast done in TestDevirtualuzation
> *should* be invalid. I couldn't find a clear statement in the standard about
> this though.
I don't think the implicit derived-to-base conversion sequence (which the
static_cast performs explicitly) does require the object to really point to a
Liar. The inverse static_cast, casting Iface* to Liar*, would be invalid if it
doesn't point to a Liar.
So on that basis, GCC is correct not to devirtualize in TestDevirtualuzation.
The Intel compiler also does an indirect call there. Clang calls Impl::foo()
directly though.
>From gcc-bugs-return-639987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:12:57 2019
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Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
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----------------------------------------------------------------------------
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>From gcc-bugs-return-639990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:18:52 2019
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Subject: [Bug middle-end/89998] [7/8/9 regression] ICE: verify_gimple failed in printf-return-value
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46097
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46097&action=edit
gcc9-pr89998.patch
Untested fix.
>From gcc-bugs-return-639989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:18:43 2019
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Subject: [Bug tree-optimization/90006] gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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Ever confirmed|0 |1
Known to fail| |7.4.0, 8.3.0, 9.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. It needs -march=x86-64 passed to cc1 to enable SSE2 or
alternatively -msse2.
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Subject: [Bug tree-optimization/90006] [7/8/9 Regression] gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog
Priority|P3 |P2
Known to work| |5.5.0
Target Milestone|--- |7.5
Summary|gcc loops indefinitely |[7/8/9 Regression] gcc
|around |loops indefinitely around
|vect_get_constant_vectors |vect_get_constant_vectors
|on -O2 -ftree-slp-vectorize |on -O2 -ftree-slp-vectorize
|-fno-math-errno |-fno-math-errno
Known to fail| |6.5.0
>From gcc-bugs-return-639992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:24:40 2019
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Subject: [Bug c++/67184] Missed optimization with C++11 final specifier
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Giovanni Deretta from comment #0)
> I would expect call(wV&) to generate the same code as call(oV&).
Except of course it should be a direct call to V::foo(), not oV::foo().
As I showed in Bug 69445 the devirtualization does happen when the final
overrider is in the derived class:
struct Base {
virtual void foo() const {};
virtual void bar() const {}
};
struct C final : Base {
void foo() const { }
};
void func(const C & c) {
c.foo(); // optimized away
c.bar();
}
It doesn't happen when the final overrider comes from the base.
>From gcc-bugs-return-639993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:25:16 2019
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Subject: [Bug ipa/89989] missed devirtualization opportunity on final function
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----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=67184
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Related to PR 65143.
I don't hink so, that's about virtual bases. It is related to PR 67184 though.
>From gcc-bugs-return-639994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:42:38 2019
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Subject: [Bug tree-optimization/90006] [7/8/9 Regression] gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so the issue is we rely on vect_get_smallest_scalar_type to get us the
expected vectors for the call input but that doesn't work here.
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Subject: [Bug middle-end/89725] [8 Regression] ICE in get_fnname_from_decl, at varasm.c:1723
Date: Mon, 08 Apr 2019 11:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89725
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 8 11:52:18 2019
New Revision: 270203
URL: https://gcc.gnu.org/viewcvs?rev=270203&root=gcc&view=rev
Log:
2019-04-01 Bin Cheng <bin.cheng@linux.alibaba.com>
PR tree-optimization/89725
* tree-chrec.c (chrec_contains_symbols): New parameter. Handle outer
loop's chrec as invariant symbol.
* tree-chrec.h (chrec_contains_symbols): New parameter.
* tree-data-ref.c (analyze_miv_subscript): Pass new argument.
(build_classic_dist_vector_1, add_other_self_distances): Bypass access
function of loops not in DDR's loop_nest.
* tree-data-ref.h (index_in_loop_nest): Add unreachable check.
* gcc.dg/tree-ssa/pr89725.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr89725.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-chrec.c
trunk/gcc/tree-chrec.h
trunk/gcc/tree-data-ref.c
trunk/gcc/tree-data-ref.h
>From gcc-bugs-return-639995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 11:52:43 2019
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Subject: [Bug middle-end/89725] [8 Regression] ICE in get_fnname_from_decl, at varasm.c:1723
Date: Mon, 08 Apr 2019 11:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89725
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] ICE in |[8 Regression] ICE in
|get_fnname_from_decl, at |get_fnname_from_decl, at
|varasm.c:1723 |varasm.c:1723
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-639997-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 12:02:13 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Mon, 08 Apr 2019 12:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90007
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-08
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
The pattern of the offending instruction is defined as
(define_insn "*float<SWI48:mode><MODEF:mode>2"
[(set (match_operand:MODEF 0 "register_operand" "=f,v,v")
(float:MODEF
(match_operand:SWI48 1 "nonimmediate_operand" "m,r,m")))]
since RA is nowadays able to reload input operand of alternative 0:
(insn 17 35 15 2 (set (reg:DF 95)
(float:DF (reg:SI 98))) "pr90007.c":8:21 172 {*floatsidf2}
(expr_list:REG_DEAD (reg:SI 98)
(nil)))
via memory:
(insn 17 35 37 2 (set (reg:DF 8 st [95])
(float:DF (mem/c:SI (plus:DI (reg/f:DI 7 sp)
(const_int -4 [0xfffffffffffffffc])) [1 %sfp+-4 S4 A32])))
"pr90007.c":8:21 172 {*floatsidf2}
(nil))
sel-sched is not prepared for this, uses:
--cut here--
/* Estimate the cost of issuing INSN on DFA state STATE. */
static int
estimate_insn_cost (rtx_insn *insn, state_t state)
{
static state_t temp = NULL;
int cost;
if (!temp)
temp = xmalloc (dfa_state_size);
memcpy (temp, state, dfa_state_size);
cost = state_transition (temp, insn);
if (cost < 0)
return 0;
else if (cost == 0)
return 1;
return cost;
}
--cut here--
that calls state_transition, which tries to calculate and verify constraints
via the following call sequence:
#4 0x000000000064ea7f in extract_constrain_insn_cached
(insn=insn@entry=0x7fffea669940) at ../../git/gcc/gcc/recog.c:2223
#5 0x0000000001217c4f in get_attr_type (insn=insn@entry=0x7fffea669940) at
../../git/gcc/gcc/config/i386/i386.md:2288
#6 0x000000000124994c in internal_dfa_insn_code_bdver1 (insn=0x7fffea669940)
at ../../git/gcc/gcc/config/i386/i386.md:15343
#7 0x0000000001233169 in dfa_insn_code (insn=0x27) at insn-automata.c:158875
#8 state_transition (state=0x21a7af0, insn=insn@entry=0x7fffea669940) at
insn-automata.c:27818
and crashes due to unmet constraints.
>From gcc-bugs-return-639998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 12:12:29 2019
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Subject: [Bug tree-optimization/90004] [graphite] ICE: Segmentation fault (in scop_get_dependences(scop*))
Date: Mon, 08 Apr 2019 12:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-08
CC| |rguenth at gcc dot gnu.org,
| |spop at gcc dot gnu.org,
| |tobi-grosser at web dot de
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can reproduce on x86_64-linux with -m32 with ISL 0.21 but not ISL 0.20. The
crash happens inside ISL though:
internal compiler error: Segmentation fault
0x1239033 crash_signal
/tmp/trunk/gcc/toplev.c:326
0x7effbfe50fdf ???
/usr/src/debug/glibc-2.22/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x22b65b0 normalize_divs
/tmp/trunk/isl/isl_map_simplify.c:1044
0x22b7b59 isl_basic_map_simplify
/tmp/trunk/isl/isl_map_simplify.c:1435
0x22986e8 isl_basic_map_intersect
/tmp/trunk/isl/isl_map.c:3569
0x2298d35 map_intersect_internal
/tmp/trunk/isl/isl_map.c:3703
0x2298e5e map_intersect
/tmp/trunk/isl/isl_map.c:3729
0x22932d8 isl_map_align_params_map_map_and
/tmp/trunk/isl/isl_map.c:1442
0x2298ea7 isl_map_intersect
/tmp/trunk/isl/isl_map.c:3739
0x2298ee0 isl_set_intersect
/tmp/trunk/isl/isl_map.c:3744
0x22a0be2 isl_map_partial_lexopt_aligned_pw_multi_aff
/tmp/trunk/isl/isl_map.c:6799
0x22a1252 isl_map_partial_lexopt_aligned
/tmp/trunk/isl/isl_map.c:6877
0x22a0ff5 isl_map_partial_lexopt
/tmp/trunk/isl/isl_map_lexopt_templ.c:182
0x22a12c2 isl_map_partial_lexmax
/tmp/trunk/isl/isl_map.c:6892
0x227ad0f restricted_partial_lexmax
/tmp/trunk/isl/isl_flow.c:590
0x227b005 last_source
/tmp/trunk/isl/isl_flow.c:651
0x227c62f compute_val_based_dependences
/tmp/trunk/isl/isl_flow.c:1204
0x227cda2 access_info_compute_flow_core
/tmp/trunk/isl/isl_flow.c:1338
0x227fbfc compute_single_flow
/tmp/trunk/isl/isl_flow.c:3094
0x227fef2 compute_flow_schedule
/tmp/trunk/isl/isl_flow.c:3178
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Program received signal SIGSEGV, Segmentation fault.
0x00000000022b65b0 in normalize_divs (bmap=0x0, progress=0x7fffffffd078)
at /tmp/trunk/isl/isl_map_simplify.c:1044
1044 for (i = 0; i < bmap->n_eq; ++i)
...
#19 0x0000000001fa482d in scop_get_dependences (scop=0x34ea320)
at /tmp/trunk/gcc/graphite-dependences.c:316
316 flow = isl_union_access_info_compute_flow (ai);
not sure if it is still GCCs fault in the end or not. At least there's
(gdb) l
1430 bmap = eliminate_unit_divs(bmap, &progress);
1431 bmap = eliminate_divs_eq(bmap, &progress);
1432 bmap = eliminate_divs_ineq(bmap, &progress);
1433 bmap = isl_basic_map_gauss(bmap, &progress);
1434 /* requires equalities in normal form */
1435 bmap = normalize_divs(bmap, &progress);
and isl_basic_map_gauss has paths where it can return NULL.
>From gcc-bugs-return-639999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 12:16:51 2019
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Subject: [Bug gcov-profile/89961] When "--intermediate-format" is used "--preserve-paths"/"--hash-filenames" is ignored
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Apr 8 12:16:15 2019
New Revision: 270204
URL: https://gcc.gnu.org/viewcvs?rev=270204&root=gcc&view=rev
Log:
Add data_file to GCOV interm. format (PR gcov-profile/89961).
2019-04-08 Martin Liska <mliska@suse.cz>
PR gcov-profile/89961
* doc/gcov.texi: Document data_file.
* gcov.c (generate_results): Add data_info into JSON output.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/gcov.texi
trunk/gcc/gcov.c
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Closing this as fixed.
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--- Comment #4 from Srinath Parvathaneni <srinath.parvathaneni at arm dot com> ---
(In reply to Thomas Koenig from comment #3)
> Can you update to a revision after r270150 and try again?
On gcc trunk this got fixed as follows.
$ ./arm-none-linux-gnueabihf-gfortran test.f90 -O1
test.f90:2:26:
2 | k = transfer (transfer (e, e), 1)
| 1
Error: 'SOURCE' argument of 'TRANSFER' intrinsic at (1) must not be a PROCEDURE
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Subject: [Bug rtl-optimization/89865] [9 Regression] FAIL: gcc.target/i386/pr49095.c scan-assembler-times \\\\), % 45
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--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Apr 8 12:35:22 2019
New Revision: 270205
URL: https://gcc.gnu.org/viewcvs?rev=270205&root=gcc&view=rev
Log:
PR rtl-optimization/89865
* config/i386/i386.md
(SWI12 peephole for mem {+,-,&,|,^}= x; mem != 0): Fix up operand
numbers not to clash with the additional operands[4].
(peepholes for mem {+,-,&,|,^}= x; mem != 0): New peephole2s
with extra register copy in the middle.
* gcc.target/i386/pr49095.c: Adjust number of expected RMW spots
on ia32.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr49095.c
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Subject: [Bug rtl-optimization/89865] [9 Regression] FAIL: gcc.target/i386/pr49095.c scan-assembler-times \\\\), % 45
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--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Apr 8 12:36:58 2019
New Revision: 270206
URL: https://gcc.gnu.org/viewcvs?rev=270206&root=gcc&view=rev
Log:
PR rtl-optimization/89865
* config/i386/i386.md: Add peepholes for z = x; x ^= y; x != z.
* gcc.target/i386/pr49095.c: Don't expect any RMW sequences.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr49095.c
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |srinath.parvathaneni at arm dot co
| |m
--- Comment #23 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
*** Bug 89987 has been marked as a duplicate of this bug. ***
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Resolving as duplicate then.
*** This bug has been marked as a duplicate of bug 89904 ***
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Subject: [Bug rtl-optimization/89865] [9 Regression] FAIL: gcc.target/i386/pr49095.c scan-assembler-times \\\\), % 45
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #25 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/83033] aarch64/cortex-a57-fma-steering.c: 3 * poor C++ style ?
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--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Mon Apr 8 12:59:24 2019
New Revision: 270207
URL: https://gcc.gnu.org/viewcvs?rev=270207&root=gcc&view=rev
Log:
The fma_forest, fma_root_node and func_fma_steering classes lack a
copy constructor. However, they contain pointers to allocated memory
so this omission can be regarded as poor style. We don't need to copy
such objects, so declare the copy constructor private to inhibit
accidental copying.
2019-04-08 Andrea Corallo <andrea.corallo@arm.com>
PR target/83033
* config/aarch64/cortex-a57-fma-steering.c (fma_forest): Prohibit copy
construction.
(fma_root_node): Likewise.
(func_fma_steering): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/cortex-a57-fma-steering.c
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Subject: [Bug sanitizer/89941] sanitizer fails to build on mips-unknown-linux-gnu
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Apr 8 13:08:30 2019
New Revision: 270208
URL: https://gcc.gnu.org/viewcvs?rev=270208&root=gcc&view=rev
Log:
Add missing libsanitizer extra patch (r259664) (PR sanitizer/89941).
2019-04-08 Martin Liska <mliska@suse.cz>
PR sanitizer/89941
* sanitizer_common/sanitizer_platform_limits_linux.cc (defined):
Reapply patch from r259664.
* sanitizer_common/sanitizer_platform_limits_posix.h (defined):
Likewise.
Modified:
trunk/libsanitizer/ChangeLog
trunk/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc
trunk/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
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Subject: [Bug libstdc++/90008] New: [9 Regression] variant attempts to copy rhs in comparison operators
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90008
Bug ID: 90008
Summary: [9 Regression] variant attempts to copy rhs in
comparison operators
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: antoshkka at gmail dot com
Target Milestone: ---
_VARIANT_RELATION_FUNCTION_TEMPLATE accidentally accepts the second visitable
by copy in `__do_visit<__detail::__variant::__visit_with_index>`.
The following test fails right now, but worked in GCC-8:
#include <variant>
struct user_defined {
user_defined();
user_defined(const user_defined&) = delete;
user_defined(user_defined&&) = delete;
};
bool operator==(const user_defined& x, const user_defined& y) { return true; }
using v_t = std::variant<user_defined, int>;
auto test(const v_t& v, const v_t& v2) {
return v == v2;
}
>From gcc-bugs-return-640010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 13:26:38 2019
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Subject: [Bug sanitizer/89941] sanitizer fails to build on mips-unknown-linux-gnu
Date: Mon, 08 Apr 2019 13:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89941
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-640011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 13:53:59 2019
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From: "cltang at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90009] New: [nvptx] ICE when OpenACC region has num_workers>1
Date: Mon, 08 Apr 2019 13:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90009
Bug ID: 90009
Summary: [nvptx] ICE when OpenACC region has num_workers>1
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: cltang at gcc dot gnu.org
Target Milestone: ---
Target: nvptx
Created attachment 46098
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46098&action=edit
testcase
./mainline/bin/gcc -w -fopenacc -O2 nvptx-worker2-ice.c
during RTL pass: mach
nvptx-worker2-ice.c: In function ‘foo._omp_fn.0’:
nvptx-worker2-ice.c:6:11: internal compiler error: Segmentation fault
6 | #pragma acc parallel num_workers(2)
| ^
0xe9b265 crash_signal
/scratch/cltang/openacc/trunk/gcc/toplev.c:326
0x132ed7e nvptx_skip_par
/scratch/cltang/openacc/trunk/gcc/config/nvptx/nvptx.c:4585
0x132f53a nvptx_neuter_pars
/scratch/cltang/openacc/trunk/gcc/config/nvptx/nvptx.c:4791
0x132f325 nvptx_neuter_pars
/scratch/cltang/openacc/trunk/gcc/config/nvptx/nvptx.c:4733
0x132fd9a nvptx_reorg
/scratch/cltang/openacc/trunk/gcc/config/nvptx/nvptx.c:5025
0xe38c94 execute
/scratch/cltang/openacc/trunk/gcc/reorg.c:3992
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
mkoffload: fatal error: ./mainline/bin/x86_64-pc-linux-gnu-accel-nvptx-none-gcc
returned 1 exit status
compilation terminated.
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Subject: [Bug tree-optimization/90006] [7/8/9 Regression] gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno
Date: Mon, 08 Apr 2019 13:54:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 8 13:54:02 2019
New Revision: 270210
URL: https://gcc.gnu.org/viewcvs?rev=270210&root=gcc&view=rev
Log:
2019-04-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/90006
* tree-vect-data-refs.c (vect_get_smallest_scalar_type): Handle
calls like lrint.
* gcc.dg/vect/bb-slp-pr90006.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/bb-slp-pr90006.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
>From gcc-bugs-return-640013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 14:14:48 2019
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Subject: [Bug target/83033] aarch64/cortex-a57-fma-steering.c: 3 * poor C++ style ?
Date: Mon, 08 Apr 2019 14:14:00 -0000
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #5 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Fixed
>From gcc-bugs-return-640014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 14:14:50 2019
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Subject: [Bug other/89863] [meta-bug] Issues that cppcheck finds that gcc misses
Date: Mon, 08 Apr 2019 14:14:00 -0000
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Bug 89863 depends on bug 83033, which changed state.
Bug 83033 Summary: aarch64/cortex-a57-fma-steering.c: 3 * poor C++ style ?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83033
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-640015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 14:32:44 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 14:32:00 -0000
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--- Comment #10 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Apr 08, 2019 at 09:59:22AM +0000, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
>
> --- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> I think it's allowed. The standards have very little to say about accuracy of
> any mathematical functions, and complex<double>(0, 0.0) == complex<double>(0,
> -0.0) is true according to the standard, because +0.0 == -0.0 is true.
>
I don't have a copy of the C++ standard, so take this specualtion.
pow(z,0.5) is equivalent to sqrt(z). From the C standard, one has
conj(csqrt(z)) = csqrt(conj(z)).
g++ does not enforce this when the imaginary part is -0;
while gcc does.
% cat c.c
#include <complex.h>
#include <stdio.h>
int
main(void)
{
double complex z, t0, t1, t2, t3;
z = CMPLX(-1.8425031517782417e-07, -0.0);
t0 = cpow(z, 0.5);
t1 = csqrt(z);
t2 = csqrt(conj(z));
t3 = conj(csqrt(z));
printf(" z = CMPLX(% .16le, % .16le)\n", creal(z), cimag(z));
printf(" cpow(z, 0.5) = CMPLX(% .16le, % .16le)\n", creal(t0), cimag(t0));
printf(" csqrt(z) = CMPLX(% .16le, % .16le)\n", creal(t1), cimag(t1));
printf("csqrt(conj(z)) = CMPLX(% .16le, % .16le)\n", creal(t2), cimag(t2));
printf("conj(csqrt(z)) = CMPLX(% .16le, % .16le)\n", creal(t3), cimag(t3));
return 0;
}
% gcc8 -o z c.c -lm && ./z
z = CMPLX(-1.8425031517782417e-07, -0.0000000000000000e+00)
cpow(z, 0.5) = CMPLX( 2.6283607659835831e-20, -4.2924388775825818e-04)
csqrt(z) = CMPLX( 0.0000000000000000e+00, -4.2924388775825818e-04)
csqrt(conj(z)) = CMPLX( 0.0000000000000000e+00, 4.2924388775825818e-04)
conj(csqrt(z)) = CMPLX( 0.0000000000000000e+00, 4.2924388775825818e-04)
mobile:kargl[210] cat a.cpp
#include <complex>
#include <iomanip>
#include <iostream>
int
main(int argc, char *argv[])
{
std::complex<double> z, t0, t1, t2, t3;
z = std::complex<double>(-1.8425031517782417e-07, -0.0);
t0 = std::pow(z, 0.5);
t1 = std::sqrt(z);
t2 = std::sqrt(std::conj(z));
t3 = std::conj(std::sqrt(z));
std::cout << " z = " << std::setprecision(15) << z << std::endl;
std::cout << " pow(z,0.5) = " << std::setprecision(15) << t0 << std::endl;
std::cout << " sqrt(z) = " << std::setprecision(15) << t1 << std::endl;
std::cout << "sqrt(conj(z)) = " << std::setprecision(15) << t2 << std::endl;
std::cout << "conj(sqrt(z)) = " << std::setprecision(15) << t3 << std::endl;
return 0;
}
% g++8 -o z a.cpp -lm && ./z
z = (-1.84250315177824e-07,-0)
pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
sqrt(z) = (0,0.000429243887758258)
sqrt(conj(z)) = (0,0.000429243887758258)
conj(sqrt(z)) = (0,-0.000429243887758258)
This looks wrong.
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Subject: [Bug c/89888] [7/8/9 Regression] When switch controlling expression is promoted from type narrower than int, GCC does not diagnose identical cases
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Guess this started with r84947 aka
https://gcc.gnu.org/ml/gcc-patches/2004-07/msg01859.html
So, if we want to error here, we should move what check_case_bounds does
(except for the fold + convert) from c_add_case_labels to start of
c_do_switch_warnings.
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #0)
> It looks like the default incoming stack isn't a constant:
And where is the bug?
>From gcc-bugs-return-640018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 15:16:53 2019
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Subject: [Bug c/89888] [7/8/9 Regression] When switch controlling expression is promoted from type narrower than int, GCC does not diagnose identical cases
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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>From gcc-bugs-return-640019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 15:38:06 2019
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Subject: [Bug rtl-optimization/90001] Compile-time hog in swing modulo scheduler
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Roman Zhuykov <zhroma at ispras dot ru> changed:
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--- Comment #3 from Roman Zhuykov <zhroma at ispras dot ru> ---
Created attachment 46099
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46099&action=edit
Proposed patch
Untested on trunk yet
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Subject: [Bug c/89990] request warning: Use of out of scope compound literals
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I agree that this would be a very useful enhancement.
The value of a pointer becomes indeterminate after the lifetime of the object
to which it points has ended. Even reading such a pointer is undefined, never
mind dereferencing it. GCC could use that to issue helpful diagnostics even in
absence of any evidence that the pointer is dereferenced, such as in the
modified example below:
int foo (mytype *ptr)
{
if (!ptr) {
ptr = &(mytype) { };
}
bar (ptr); // undefined
}
This applies not just to compound literals but to all other objects, including
auto, allocated, and thread local storage.
>From gcc-bugs-return-640021-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 15:53:10 2019
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Subject: [Bug rtl-optimization/90001] Compile-time hog in swing modulo scheduler
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--- Comment #4 from Roman Zhuykov <zhroma at ispras dot ru> ---
Thanks for testcase.
2-3 weeks ago I already caught and fixed this on my local branch, see some info
in the bottom.
Current algorithm which finds recurrence_length for all DDG strongly connected
components works in like O(N^6) time, where N in the number of nodes in DDG.
The time is so bad mostly for graphs with lots of edges, like almost N^2 edges.
Richard's suggestion is right - it will be still something like O(N^5) in worst
case even without bitmap overhead for such graphs. My proposed algorithm works
in O(N^3). Algorithm of finding SCCs itself is also not optimal (maybe up to
O(N^4)), but here it left untouched.
For some situations, when amount of edges is smaller (like equal to N), new
algorithm can be unfortunately slower than old one. But I think it's better
here to add some bail-out when we got more than 1000 nodes for example.
Before creating this patch, I tested special version of it, where both
approaches were in action and asserts were inserted to check that algorithms
results (longest_simple_path values) are absolutely the same. I can publish
this special version if needed.
I wonder how regression test can be created for such a situation?
[Testing]
Proposed patch with a bunch of ~25 other patches was tested a lot:
*(1) Bootstrapped and regtested on x86_64
*(2) Cross-compiler regtest on aarch64, arm, powerpc, powerpc64, ia64 and s390
*(3) Also done (1) and (2) with -fmodulo-sched enabled by default
*(4) Also done (1) and (2) with -fmodulo-sched and
-fmodulo-sched-allow-regmoves enabled by default
*(5) Moreover, all (1-4) was also done with 4.9, 5, 6, 7, and 8 branches, on
active branches an trunk date was 20190327.
More than 250 compiler instances built and tested in total (counting
both "unpatched" vs "patched").
No new failures which can relate to this algorithm were found.
"Special version" was also tested in practically same scenarios (and one more
week before, like 20190320), but not exactly all of them.
But still have to retest it separately without all my stuff :)
[PS] Last month I spent a lot of time updating my patches described here
https://gcc.gnu.org/ml/gcc-patches/2017-02/msg01647.html and have locally added
several other patches, including this fix. My updated branches are not
published yet, because there are still some unsolved issues, I can't fix some
bugzilla PRs also. I'll try to add comments in another modulo-sched-related PRs
soon.
>From gcc-bugs-return-640022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 16:09:24 2019
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Subject: [Bug target/89993] Inconsistent incoming stack boundary
Date: Mon, 08 Apr 2019 16:09:00 -0000
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #1)
> (In reply to H.J. Lu from comment #0)
> > It looks like the default incoming stack isn't a constant:
> And where is the bug?
The bug is that -mstackrealign has different behaviors on tail call,
depending on if -mincoming-stack-boundary=4 or
__m128 x;
is used. I am expecting the same tail call optimization with
-mstackrealign -S -O2
for
int tst2Foo(int*, int*, int);
int tst1Foo(int* pSrc, int* pDst, int len)
{
return tst2Foo(pSrc, pDst, len);
}
and
#include <xmmintrin.h>
int tst2Foo(int*, int*, int, __m128*);
int tst1Foo(int* pSrc, int* pDst, int len)
{
__m128 x;
return tst2Foo(pSrc, pDst, len, &x);
}
with and without -mincoming-stack-boundary=4.
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Subject: [Bug fortran/90002] ICE: free_expr0(): Bad expr type
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kargl at gcc dot gnu.org changed:
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--- Comment #2 from kargl at gcc dot gnu.org ---
This fixes the ICE, but it may also leak memory for one
of the bounds.
Index: gcc/fortran/array.c
===================================================================
--- gcc/fortran/array.c (revision 270181)
+++ gcc/fortran/array.c (working copy)
@@ -324,10 +324,22 @@ gfc_free_array_spec (gfc_array_spec *as)
if (as == NULL)
return;
- for (i = 0; i < as->rank + as->corank; i++)
+ if (as->corank == 0)
{
- gfc_free_expr (as->lower[i]);
- gfc_free_expr (as->upper[i]);
+ for (i = 0; i < as->rank; i++)
+ {
+ gfc_free_expr (as->lower[i]);
+ gfc_free_expr (as->upper[i]);
+ }
+ }
+ else
+ {
+ int n = as->rank + as->corank - (as->cotype == AS_EXPLICIT ? 1 : 0);
+ for (i = 0; i < n; i++)
+ {
+ gfc_free_expr (as->lower[i]);
+ gfc_free_expr (as->upper[i]);
+ }
}
free (as);
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90010
Bug ID: 90010
Summary: valgrind error with snprintf and -Wall
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C++ source code:
extern "C" __inline __attribute__((__gnu_inline__)) int snprintf(...) {}
class a {
char b[4096];
void c();
};
void a::c() {
char d[4096];
snprintf(d, sizeof(d), "%s/power/runtime_suspended_time", b);
}
on a valgrind version of recent gcc trunk:
$ ~/gcc/results.270150.valgrind/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results.270150.valgrind/bin/g++
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results.270150.valgrind/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../trunk/configure
--prefix=/home/dcb/gcc/results.270150.valgrind --disable-bootstrap
--disable-multilib --disable-werror --enable-checking=valgrind
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 9.0.1 20190404 (experimental) (GCC)
[dcb@localhost dcbTest]$
with compile flag -Wall, makes this:
$ ~/gcc/results.270150.valgrind/bin/g++ -c -Wall bug514.cc
bug514.cc:1:57: warning: declaration of ‘int snprintf(...)’ conflicts with
built-in declaration ‘int snprintf(char*, long unsigned int, const char*, ...)’
[-Wbuiltin-declaration-mismatch]
1 | extern "C" __inline __attribute__((__gnu_inline__)) int snprintf(...)
{}
| ^~~~~~~~
bug514.cc: In function ‘int snprintf(...)’:
bug514.cc:1:72: warning: no return statement in function returning non-void
[-Wreturn-type]
1 | extern "C" __inline __attribute__((__gnu_inline__)) int snprintf(...)
{}
|
^
==30913== Conditional jump or move depends on uninitialised value(s)
==30913== at 0x483BB9D: strnlen (vg_replace_strmem.c:428)
==30913== by 0x137D3F3: pp_format(pretty_printer*, text_info*)
(pretty-print.c:1374)
==30913== by 0x1373D62: diagnostic_report_diagnostic(diagnostic_context*,
diagnostic_info*) (diagnostic.c:1015)
==30913== by 0xB5F828: format_string_diagnostic_t::emit_warning_n_va(int,
unsigned long, char const*, char const*, __va_list_tag (*) [1]) const
(substring-locations.c:216)
>From gcc-bugs-return-640025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 16:50:52 2019
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Subject: [Bug c++/90010] valgrind error with snprintf and -Wall
Date: Mon, 08 Apr 2019 16:50:00 -0000
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
I forgot to mention that I have also set a valgrind option:
$ set | fgrep VAL
VALGRIND_OPTS=--expensive-definedness-checks=yes
$
Might be significant.
>From gcc-bugs-return-640026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 16:54:11 2019
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Subject: [Bug libstdc++/90008] [9 Regression] variant attempts to copy rhs in comparison operators
Date: Mon, 08 Apr 2019 16:54:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-08
Target Milestone|--- |9.0
Ever confirmed|0 |1
>From gcc-bugs-return-640027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 17:00:35 2019
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Subject: [Bug middle-end/89998] [7/8/9 regression] ICE: verify_gimple failed in printf-return-value
Date: Mon, 08 Apr 2019 17:00:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |msebor at gcc dot gnu.org
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is another instance of the mismatched built-in signature problem. With
-Wextra GCC 9 prints:
warning: mismatch in return type of built-in function ‘sprintf’; expected
‘int’ [-Wbuiltin-declaration-mismatch]
1 | unsigned int sprintf (char *str, const char *fmt, ...);
As we discussed, having the warning for the declaration disable treating the
function as a built-in will avoid these bugs.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85741
[Bug 85741] [meta-bug] bogus/missing -Wformat-overflow
>From gcc-bugs-return-640028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 17:09:10 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #11 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Apr 08, 2019 at 02:32:38PM +0000, sgk at troutmask dot
apl.washington.edu wrote:
>
> I don't have a copy of the C++ standard, so take this specualtion.
> pow(z,0.5) is equivalent to sqrt(z). From the C standard, one has
>
> conj(csqrt(z)) = csqrt(conj(z)).
>
> g++ does not enforce this when the imaginary part is -0;
> while gcc does.
(code snipped)
> % gcc8 -o z c.c -lm && ./z
> z = CMPLX(-1.8425031517782417e-07, -0.0000000000000000e+00)
> cpow(z, 0.5) = CMPLX( 2.6283607659835831e-20, -4.2924388775825818e-04)
> csqrt(z) = CMPLX( 0.0000000000000000e+00, -4.2924388775825818e-04)
> csqrt(conj(z)) = CMPLX( 0.0000000000000000e+00, 4.2924388775825818e-04)
> conj(csqrt(z)) = CMPLX( 0.0000000000000000e+00, 4.2924388775825818e-04)
(code snipped)
> % g++8 -o z a.cpp -lm && ./z
> z = (-1.84250315177824e-07,-0)
> pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> sqrt(z) = (0,0.000429243887758258)
> sqrt(conj(z)) = (0,0.000429243887758258)
> conj(sqrt(z)) = (0,-0.000429243887758258)
>
> This looks wrong.
It is wrong. From n4810.pdf, page 1102,
template<class T> complex<T> sqrt(const complex<T>& x);
Returns: The complex square root of x, in the range of the right
half-plane. [Note: The semantics of this function are intended to
be the same in C++ as they are for csqrt in C. -- end note]
unless [Note: ...] is non-normative text.
>From gcc-bugs-return-640029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 17:16:16 2019
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/51961] [OOP] ALLOCATE with MOLD= rejects if source-expr has a different rank
Date: Mon, 08 Apr 2019 17:16:00 -0000
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--- Comment #3 from janus at gcc dot gnu.org ---
(In reply to Dominique d'Humieres from comment #1)
> What is allocate supposed to do if the array and the mold are not
> conformable?
AFAICS the mold expr is normally only used for the type, provided the shape of
the allocate-object is specified explicitly, as in Tobias' example:
allocate (a(2), mold=b) ! Valid - but not accepted
I tend to agree that this might be valid. Then 'a' should be allocated with two
elements and using the type from 'b'.
However, if the shape is not specified explicitly, then it can be taken from
the source-expr (therefore the rank needs to agree) as in this example:
allocate (a, mold=b) ! correctly rejected?
From F08 section 9.7.1.2:
When an ALLOCATE statement is executed for an array with no
allocate-shape-spec-list, the bounds of source-expr determine the bounds of the
array. Subsequent changes to the bounds of source-expr do not affect the array
bounds.
I would conclude that this second case is invalid, however this is not
reflected in C638, which might possibly be an oversight in Fortran 2008. AFAICS
Fortran 2018 changes nothing in this regard.
>From gcc-bugs-return-640030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 17:27:59 2019
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Subject: [Bug middle-end/89977] missing -Wstringop-overflow with an out-of-bounds int128_t range
Date: Mon, 08 Apr 2019 17:27:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
You're right that the conversion from int128_t to unsigned long can result in
truncation, so the range of the result is that of unsigned long. Yet I suspect
that relying on it is more likely unintentional and a bug. The question in my
mind is whether narrowing int128_t conversions should be diagnosed just in
these contexts (i.e., -Wstringop-overflow) or in others as well.
>From gcc-bugs-return-640031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 18:37:29 2019
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Subject: [Bug c/89888] [7/8/9 Regression] When switch controlling expression is promoted from type narrower than int, GCC does not diagnose identical cases
Date: Mon, 08 Apr 2019 18:37:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46100
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46100&action=edit
gcc9-pr89888.patch
Untested fix.
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Subject: [Bug testsuite/68972] g++.dg/cpp1y/vla-initlist1.C test case fails on powerpc64le
Date: Mon, 08 Apr 2019 18:46:00 -0000
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kelvin at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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CC| |kelvin at gcc dot gnu.org
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--- Comment #15 from kelvin at gcc dot gnu.org ---
Patched and backported.
>From gcc-bugs-return-640033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:01:58 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Steve Kargl from comment #11)
> unless [Note: ...] is non-normative text.
That's exactly what it is.
But we can still aim to meet the intended behaviour.
>From gcc-bugs-return-640034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:02:22 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90011] New: trailing space in diagnostic
Date: Mon, 08 Apr 2019 19:02:00 -0000
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Bug ID: 90011
Summary: trailing space in diagnostic
Product: gcc
Version: 9.0
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Component: translation
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Please teach the diagnostics linter to reject the following code from
cp/typeck2.c:
pedwarn (loc, OPT_Wnarrowing,
"narrowing conversion of %qE from %qH to %qI ",
There is no hint anywhere near this code that the trailing space might be
intentional. Therefore it should be rejected before the commit.
It should be allowed if there is a comment above the statement explaining why
the trailing space is intentional.
>From gcc-bugs-return-640035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:09:17 2019
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Subject: [Bug translation/90011] [9 Regression] trailing space in diagnostic
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-08
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Target Milestone|--- |9.0
Summary|trailing space in |[9 Regression] trailing
|diagnostic |space in diagnostic
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r263523, before that it has been followed by inside {} and thus
the space was intentional, but now it is not. I'll handle this.
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Subject: [Bug d/90012] New: untranslateable placeholder in expressionsem.c
Date: Mon, 08 Apr 2019 19:10:00 -0000
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Bug ID: 90012
Summary: untranslateable placeholder in expressionsem.c
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From expressionsem.c:
const char *p = v->isParameter() ? "parameter" : "local";
e->error("cannot take address of scope %s %s in @safe function %s",
p, v->toChars(), sc->func->toChars());
As a translator I have no chance of translating the first %s since it is passed
literally.
Please add a check to the diagnostics linter that can detect this case.
Detecting this case is possible since:
* p is only ever assigned a string literal
* that string literal is never passed through _(...)
* that string literal is passed as a replacement for a %s into a message
Translating GCC is a huge amount of work. If only 1% of the messages is broken
like this, this means 130 bug reports. That 1% is a pretty good estimate, based
on my experience. I'd like that rate to be in the order of 0.1%.
>From gcc-bugs-return-640037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:18:29 2019
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Subject: [Bug d/90013] New: wrong quotes in diagnostics
Date: Mon, 08 Apr 2019 19:18:00 -0000
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Bug ID: 90013
Summary: wrong quotes in diagnostics
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The GCC standard for diagnostics is:
* placeholders are quoted: use %qs instead of a simple %s
* quotes are written %<like this%> instead of `this' or `this` or 'this' or
"this" or similar variants
Since the D diagnostics are marked with "gcc-internal-format", as a translator
I expect that I can use the full range of these placeholders. The current
diagnostics only use the simple %s, therefore my assumption might be wrong. If
it is, it's the fault of the program that generates the .pot file. That should
be fixed to not mark these strings as gcc-internal-format then.
>From gcc-bugs-return-640038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:20:27 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 19:20:00 -0000
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--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Steve Kargl from comment #10)
> % g++8 -o z a.cpp -lm && ./z
> z = (-1.84250315177824e-07,-0)
> pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> sqrt(z) = (0,0.000429243887758258)
> sqrt(conj(z)) = (0,0.000429243887758258)
> conj(sqrt(z)) = (0,-0.000429243887758258)
>
> This looks wrong.
I can't reproduce this, I get:
z = (-1.84250315177824e-07,-0)
pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
sqrt(z) = (0,-0.000429243887758258)
sqrt(conj(z)) = (0,0.000429243887758258)
conj(sqrt(z)) = (0,0.000429243887758258)
>From gcc-bugs-return-640039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:23:05 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90014] New: Untranslatable Fortran diagnostics
Date: Mon, 08 Apr 2019 19:23:00 -0000
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Bug ID: 90014
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gcc/po/gcc.pot has:
#. Macros for unified error messages.
#: fortran/frontend-passes.c:3746
msgid "Incorrect extent in argument B in MATMUL intrinsic in dimension "
msgstr ""
#: fortran/frontend-passes.c:3749
msgid "Array bound mismatch for dimension "
msgstr ""
which is what exgettext creates for:
#define B_ERROR(n) _("Incorrect extent in argument B in MATMUL intrinsic in " \
"dimension " #n ": is %ld, should be %ld")
#define C_ERROR(n) _("Array bound mismatch for dimension " #n " of array " \
"(%ld/%ld)")
and
B_ERROR(1) or C_ERROR(1) or C_ERROR(2).
This simply won't work, exgettext isn't able to deal with that kind of
stringification.
Either use %d and somehow propagate the value as another argument, or
use B_ERROR_1, C_ERROR_1 and C_ERROR_2 macros that won't use this kind of
stringification.
>From gcc-bugs-return-640040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:23:16 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Which is unsurprising because std::sqrt(z) just calls
__builtin_csqrt(z.__rep())
>From gcc-bugs-return-640041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:37:20 2019
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Subject: [Bug target/90015] New: riscv: typo "intterupt" in diagnostic
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Bug ID: 90015
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risvc.c:
error ("%qs function cannot have different intterupt type.", "interrupt");
intterupt should be interrupt
>From gcc-bugs-return-640042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:37:48 2019
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Subject: [Bug libstdc++/90008] [9 Regression] variant attempts to copy rhs in comparison operators
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -1118,7 +1118,7 @@ namespace __variant
{ \
bool __ret = true; \
__do_visit<__detail::__variant::__visit_with_index>( \
- [&__ret, &__lhs, __rhs] \
+ [&__ret, &__lhs] \
(auto&& __rhs_mem, auto __rhs_index) mutable \
-> __detail::__variant::__variant_idx_cookie \
{ \
>From gcc-bugs-return-640043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:40:46 2019
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Subject: [Bug libstdc++/89851] [9 Regression] std::variant comparison operators violate [variant.relops]
Date: Mon, 08 Apr 2019 19:40:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This seems to have been fixed recently.
>From gcc-bugs-return-640044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:42:18 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 19:42:00 -0000
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--- Comment #15 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #13)
> (In reply to Steve Kargl from comment #10)
> > % g++8 -o z a.cpp -lm && ./z
> > z = (-1.84250315177824e-07,-0)
> > pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> > sqrt(z) = (0,0.000429243887758258)
> > sqrt(conj(z)) = (0,0.000429243887758258)
> > conj(sqrt(z)) = (0,-0.000429243887758258)
> >
> > This looks wrong.
>
> I can't reproduce this, I get:
>
> z = (-1.84250315177824e-07,-0)
> pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> sqrt(z) = (0,-0.000429243887758258)
> sqrt(conj(z)) = (0,0.000429243887758258)
> conj(sqrt(z)) = (0,0.000429243887758258)
My bet now comes to the fact there have been improvements to glibc which
changed the behavior here ....
Also I used the wrong term, it is the branch cut that is the issue. Most of
the branch cuts were fixed in glibc in 2012; though there might have been some
fixed later on.
>From gcc-bugs-return-640046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:48:44 2019
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Subject: [Bug target/90016] New: aarch64: reference to undeclared N in help for command line option
Date: Mon, 08 Apr 2019 19:48:00 -0000
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Bug ID: 90016
Summary: aarch64: reference to undeclared N in help for command
line option
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From aarch64.opt:
-msve-vector-bits=<number> Set the number of bits in an SVE vector
register to N.
In a previous version, the text was "-msve-vector-bits=N", and in that version
the "set to N" made sense. After changing the N to <number>, the N refers to an
undefined identifier.
>From gcc-bugs-return-640045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:48:28 2019
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Subject: [Bug target/90015] riscv: typo "intterupt" in diagnostic
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46101
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46101&action=edit
gcc9-pr90015.patch
Untested fix.
>From gcc-bugs-return-640047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 19:56:24 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #16 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Apr 08, 2019 at 07:20:22PM +0000, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
>
> --- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to Steve Kargl from comment #10)
> > % g++8 -o z a.cpp -lm && ./z
> > z = (-1.84250315177824e-07,-0)
> > pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> > sqrt(z) = (0,0.000429243887758258)
> > sqrt(conj(z)) = (0,0.000429243887758258)
> > conj(sqrt(z)) = (0,-0.000429243887758258)
> >
> > This looks wrong.
>
> I can't reproduce this, I get:
>
> z = (-1.84250315177824e-07,-0)
> pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> sqrt(z) = (0,-0.000429243887758258)
> sqrt(conj(z)) = (0,0.000429243887758258)
> conj(sqrt(z)) = (0,0.000429243887758258)
>
My results are for i585-*-freebsd, which doesn't use glibc.
If Andrew is correct and a builtin is called, you might find
my results if you use -fno-builtins (check spelling).
Looking at ./libstdc++-v3/include/std/complex, one finds.
// 26.2.8/13 sqrt(__z): Returns the complex square root of __z.
// The branch cut is on the negative axis.
template<typename _Tp>
complex<_Tp>
__complex_sqrt(const complex<_Tp>& __z)
{
_Tp __x = __z.real();
_Tp __y = __z.imag();
if (__x == _Tp())
{
_Tp __t = sqrt(abs(__y) / 2);
return complex<_Tp>(__t, __y < _Tp() ? -__t : __t);
}
else
{
_Tp __t = sqrt(2 * (std::abs(__z) + abs(__x)));
_Tp __u = __t / 2;
return __x > _Tp()
? complex<_Tp>(__u, __y / __t)
: complex<_Tp>(abs(__y) / __t, __y < _Tp() ? -__u : __u);
}
}
Doesn't this gets the wrong answer for __y = -0 (as -0 < 0 is false)?
>From gcc-bugs-return-640048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 20:03:40 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #17 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>Doesn't this gets the wrong answer for __y = -0 (as -0 < 0 is false)?
No, you missed this part:
// The branch cut is on the negative axis.
So maybe the bug is inside FreeBSD and Window's libm. Glibc fixed the branch
cuts issues back in 2012 for csqrt but the other OS's did not change theirs.
>From gcc-bugs-return-640049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 20:32:49 2019
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Subject: [Bug c/448] <stdint.h>-related issues (C99 issues)
Date: Mon, 08 Apr 2019 20:32:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |coypu at sdf dot org
--- Comment #43 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #39)
> (In reply to joseph@codesourcery.com from comment #38)
> > I think the correct state is NEW. There is a well-defined set of target
> > OSes that lack the target macro definitions describing those targets'
> > stdint.h types, each of which should be straightforward to fix for someone
> > with access to the target OS in question to examine its headers and run
> > tests.
>
> That's still these ones, right?
>
> (In reply to joseph@codesourcery.com from comment #31)
> > The following targets still appear to be missing this type information in
> > GCC: some NetBSD targets (netbsd-stdint.h only used for x86 / x86_64),
> > VxWorks, SymbianOS, LynxOS, QNX, TPF. Others have either been fixed, or
> > obsoleted and removed.
>
> cc-ing maintainers of those ports
coypu at sdf dot org seems to be a de facto maintainer for NetBSD these days so
cc-ing them as well
>From gcc-bugs-return-640050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 21:08:14 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 21:08:00 -0000
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--- Comment #18 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Apr 08, 2019 at 08:03:36PM +0000, pinskia at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
>
> --- Comment #17 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> >Doesn't this gets the wrong answer for __y = -0 (as -0 < 0 is false)?
>
> No, you missed this part:
> // The branch cut is on the negative axis.
No, I didn't miss that part.
> So maybe the bug is inside FreeBSD and Window's libm. Glibc fixed the branch
> cuts issues back in 2012 for csqrt but the other OS's did not change theirs.
For the C++ code in comment, on x86_64-*-freebsd.
% g++8 -o z a.cpp -lm && ./z
z = (-1.84250315177824e-07,-0)
pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
sqrt(z) = (0,0.000429243887758258)
sqrt(conj(z)) = (0,0.000429243887758258)
conj(sqrt(z)) = (0,-0.000429243887758258)
The last two lines are definitely wrong.
troutmask:sgk[209] nm z | grep csqrt
troutmask:sgk[210] nm z | grep sqrt
000000000040156b W _ZSt14__complex_sqrtIdESt7complexIT_ERKS2_
000000000040143d W _ZSt4sqrtIdESt7complexIT_ERKS2_
U sqrt@@FBSD_1.0
There is no reference to csqrt in the exectuable. If I change
/usr/local/lib/gcc8/include/c++/complex to use copysign
to account for __y = -0 like
template<typename _Tp>
complex<_Tp>
__complex_sqrt(const complex<_Tp>& __z)
{
_Tp __x = __z.real();
_Tp __y = __z.imag();
if (__x == _Tp())
{
_Tp __t = sqrt(abs(__y) / 2);
// return complex<_Tp>(__t, __y < _Tp() ? -__t : __t);
return complex<_Tp>(__t, copysign(__t, __y));
}
else
{
_Tp __t = sqrt(2 * (std::abs(__z) + abs(__x)));
_Tp __u = __t / 2;
// return __x > _Tp()
// ? complex<_Tp>(__u, __y / __t)
// : complex<_Tp>(abs(__y) / __t, __y < _Tp() ? -__u : __u);
return __x > _Tp()
? complex<_Tp>(__u, __y / __t)
: complex<_Tp>(abs(__y) / __t, copysign(__u, __y));
}
}
The C++ code in comment #10 gives
g++8 -o z a.cpp -lm && ./z
z = (-1.84250315177824e-07,-0)
pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
sqrt(z) = (0,-0.000429243887758258)
sqrt(conj(z)) = (0,0.000429243887758258)
conj(sqrt(z)) = (0,0.000429243887758258)
The correct answer. QED.
>From gcc-bugs-return-640051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 21:16:42 2019
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Subject: [Bug c/448] <stdint.h>-related issues (C99 issues)
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--- Comment #44 from coypu <coypu at sdf dot org> ---
(In reply to joseph@codesourcery.com from comment #31)
> GCC: some NetBSD targets (netbsd-stdint.h only used for x86 / x86_64),
Speaking for NetBSD only:
as of https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=253323 , we
include netbsd-stdint.h for all netbsd targets.
>From gcc-bugs-return-640053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 21:30:28 2019
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Subject: [Bug translation/89939] messages for translation must not contain embedded macro parameters
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 90014 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-640052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 21:30:28 2019
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Subject: [Bug fortran/90014] Untranslatable Fortran diagnostics
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Dup.
*** This bug has been marked as a duplicate of bug 89939 ***
>From gcc-bugs-return-640054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 21:46:53 2019
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
--- Comment #19 from kargl at gcc dot gnu.org ---
(In reply to Steve Kargl from comment #18)
> On Mon, Apr 08, 2019 at 08:03:36PM +0000, pinskia at gcc dot gnu.org wrote:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
> >
> > --- Comment #17 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> > >Doesn't this gets the wrong answer for __y = -0 (as -0 < 0 is false)?
> >
> > No, you missed this part:
> > // The branch cut is on the negative axis.
>
> No, I didn't miss that part.
>
> > So maybe the bug is inside FreeBSD and Window's libm. Glibc fixed the branch
> > cuts issues back in 2012 for csqrt but the other OS's did not change theirs.
>
> For the C++ code in comment, on x86_64-*-freebsd.
>
> % g++8 -o z a.cpp -lm && ./z
> z = (-1.84250315177824e-07,-0)
> pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> sqrt(z) = (0,0.000429243887758258)
> sqrt(conj(z)) = (0,0.000429243887758258)
> conj(sqrt(z)) = (0,-0.000429243887758258)
>
> The last two lines are definitely wrong.
>
> troutmask:sgk[209] nm z | grep csqrt
> troutmask:sgk[210] nm z | grep sqrt
> 000000000040156b W _ZSt14__complex_sqrtIdESt7complexIT_ERKS2_
> 000000000040143d W _ZSt4sqrtIdESt7complexIT_ERKS2_
> U sqrt@@FBSD_1.0
>
> There is no reference to csqrt in the exectuable. If I change
> /usr/local/lib/gcc8/include/c++/complex to use copysign
> to account for __y = -0 like
>
> template<typename _Tp>
> complex<_Tp>
> __complex_sqrt(const complex<_Tp>& __z)
> {
> _Tp __x = __z.real();
> _Tp __y = __z.imag();
>
> if (__x == _Tp())
> {
> _Tp __t = sqrt(abs(__y) / 2);
> // return complex<_Tp>(__t, __y < _Tp() ? -__t : __t);
> return complex<_Tp>(__t, copysign(__t, __y));
> }
> else
> {
> _Tp __t = sqrt(2 * (std::abs(__z) + abs(__x)));
> _Tp __u = __t / 2;
> // return __x > _Tp()
> // ? complex<_Tp>(__u, __y / __t)
> // : complex<_Tp>(abs(__y) / __t, __y < _Tp() ? -__u : __u);
> return __x > _Tp()
> ? complex<_Tp>(__u, __y / __t)
> : complex<_Tp>(abs(__y) / __t, copysign(__u, __y));
> }
> }
>
>
> The C++ code in comment #10 gives
>
> g++8 -o z a.cpp -lm && ./z
> z = (-1.84250315177824e-07,-0)
> pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
> sqrt(z) = (0,-0.000429243887758258)
> sqrt(conj(z)) = (0,0.000429243887758258)
> conj(sqrt(z)) = (0,0.000429243887758258)
>
> The correct answer. QED.
BTW, if change /usr/local/lib/gcc8/include/c++/complex back to
no using copysign(), and instead change
#if _GLIBCXX_USE_C99_COMPLEX
inline __complex__ float
__complex_sqrt(__complex__ float __z) { return __builtin_csqrtf(__z); }
to
#if _GLIBCXX_USE_C99_COMPLEX || SOMETHING_UGLY
inline __complex__ float
__complex_sqrt(__complex__ float __z) { return __builtin_csqrtf(__z); }
and do
g++8 -DSOMETHING_UGLY -o z a.cpp -lm && ./z
z = (-1.84250315177824e-07,-0)
pow(z,0.5) = (2.62836076598358e-20,-0.000429243887758258)
sqrt(z) = (0,-0.000429243887758258)
sqrt(conj(z)) = (0,0.000429243887758258)
conj(sqrt(z)) = (0,0.000429243887758258)
I get the expected. So, if you're on a system that has
_GLIBCXX_USE_C99_COMPLEX, you won't see the bug.
It is likely that everywhere that a construct of the
form __y < _Tp() ? -__u : __u appear, it needs to use
copysign.
>From gcc-bugs-return-640056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 22:17:22 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 22:17:00 -0000
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--- Comment #21 from kargl at gcc dot gnu.org ---
Created attachment 46102
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46102&action=edit
fix g++ problem with sqrt(z) where z is complex and imag(z) = -0
>From gcc-bugs-return-640055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 22:17:05 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 22:17:00 -0000
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--- Comment #20 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Steve Kargl from comment #16)
> If Andrew is correct and a builtin is called,
Wasn't that me, not Andrew?
> you might find
> my results if you use -fno-builtins (check spelling).
No, same results. Calling __builtin_csqrt doesn't necessarily mean GCC
evaluates it. Without optimisation it still generates a call to csqrt from
libc.
> Looking at ./libstdc++-v3/include/std/complex, one finds.
>
> // 26.2.8/13 sqrt(__z): Returns the complex square root of __z.
> // The branch cut is on the negative axis.
> template<typename _Tp>
> complex<_Tp>
> __complex_sqrt(const complex<_Tp>& __z)
> {
> _Tp __x = __z.real();
> _Tp __y = __z.imag();
>
> if (__x == _Tp())
> {
> _Tp __t = sqrt(abs(__y) / 2);
> return complex<_Tp>(__t, __y < _Tp() ? -__t : __t);
> }
> else
> {
> _Tp __t = sqrt(2 * (std::abs(__z) + abs(__x)));
> _Tp __u = __t / 2;
> return __x > _Tp()
> ? complex<_Tp>(__u, __y / __t)
> : complex<_Tp>(abs(__y) / __t, __y < _Tp() ? -__u : __u);
> }
> }
>
> Doesn't this gets the wrong answer for __y = -0 (as -0 < 0 is false)?
Yes, but that code shouldn't be used for modern targets ...
(In reply to kargl from comment #19)
> I get the expected. So, if you're on a system that has
> _GLIBCXX_USE_C99_COMPLEX, you won't see the bug.
Wow, why isn't libstdc++ using the C99 <math.h> functions on FreeBSD?
I'll have to look into that.
> It is likely that everywhere that a construct of the
> form __y < _Tp() ? -__u : __u appear, it needs to use
> copysign.
That won't always work, because the generic functions should really only get
used when _Tp is not one of float, double or long double. And in that case
there might be no copysign for the type.
For float, double and long double we should be using the libc routines. So the
bug is that FreeBSD isn't using them.
The _original_ bug report is for std::pow though, and on Ubuntu, which does use
glibc. Comment 9 needs more analysis.
>From gcc-bugs-return-640057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 22:36:45 2019
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Subject: [Bug d/88150] Use sections_elf_shared.d on Solaris
Date: Mon, 08 Apr 2019 22:36:00 -0000
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--- Comment #10 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
I've got a (horrible?) hack for getting tls_modid from Solaris.
Looking at dlinfo(RTLD_DI_LINKMAP):
https://github.com/illumos/illumos-gate/blob/4e0c5eff9af325c80994e9527b7cb8b3a1ffd1d4/usr/src/cmd/sgs/rtld/common/dlfcns.c#L1927-L1934
The lmp variable returned is originally an Rt_map*, layout is:
---
struct Rt_map
{
Link_map rt_public;
const char* rt_pathname;
c_ulong rt_padstart;
c_ulong rt_padimlen;
c_ulong rt_msize;
uint rt_flags;
uint rt_flags1;
c_ulong rt_tlsmodid;
}
---
Let's do a little test...
---
case PT_TLS: // TLS segment
assert(!pdso._tlsSize); // is unique per DSO
static if (OS_Have_Dlpi_Tls_Modid)
{
pdso._tlsMod = info.dlpi_tls_modid;
pdso._tlsSize = phdr.p_memsz;
}
else version (Solaris)
{
Rt_map* map;
version (Shared)
dlinfo(handleForName(info.dlpi_name), RTLD_DI_LINKMAP, &map);
else
dlinfo(RTLD_SELF, RTLD_DI_LINKMAP, &map);
pdso._tlsMod = map.rt_tlsmodid;
pdso._tlsSize = phdr.p_memsz;
}
else
{
pdso._tlsMod = 0;
pdso._tlsSize = 0;
}
break;
---
Inspecting this in gdb
---
(gdb) p map
$1 = (struct Rt_map *) 0xfedb001
(gdb) p *map
$2 = {rt_public = {l_addr = 4275896320,
l_name = 0xfc0f02e4
"/mnt/build/i386-pc-solaris2.11/./libphobos/libdruntime/.libs/libgdruntime.so.76",
l_ld = 0xfedd00d4, l_next = 0xfedb0678, l_prev = 0xfef206c8, l_refname = 0x0},
rt_pathname = 0xfc0f0334
"/mnt/build/i386-pc-solaris2.11/libphobos/libdruntime/.libs/libgdruntime.so.76.0.3",
rt_padstart = 4275896320, rt_padimlen = 1272912, rt_msize = 1272912, rt_flags =
272761348,
rt_flags1 = 1155, rt_tlsmodid = 2}
---
And there it is, a valid rt_tlsmodid.
Interestingly, Solaris sets the first tlsmodid to zero.
https://github.com/illumos/illumos-gate/blob/8a06b3d6467c15646e663c05086378f16288af85/usr/src/cmd/sgs/rtld/common/tls.c#L52-L60
This is in stark contrast to what elf_shared expects, given that there's an
assert that it is always non-zero if _tlsSize is set.
>From gcc-bugs-return-640058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 22:41:17 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #22 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Apr 08, 2019 at 10:17:00PM +0000, redi at gcc dot gnu.org wrote:
> (In reply to kargl from comment #19)
> > I get the expected. So, if you're on a system that has
> > _GLIBCXX_USE_C99_COMPLEX, you won't see the bug.
>
> Wow, why isn't libstdc++ using the C99 <math.h> functions on FreeBSD?
>
Because it is all or nothing. See comment #8 and #9 in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89125
If you're too busy to look at PR89125 the upshot is that
FreeBSD is missing ccoshl, ccosl, cexpl, csinhl, csinl,
ctanhl, and ctanl. I have BSD licensed versions of
ccoshl, ccosl, cexpl, csinhl, and csinl, but testing
on FreeBSD ran into what I consider to be a very bad
bug in clang (FreeBSD system compiler).
>From gcc-bugs-return-640059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 23:17:42 2019
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Subject: [Bug d/88150] Use sections_elf_shared.d on Solaris
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--- Comment #11 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #10 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> I've got a (horrible?) hack for getting tls_modid from Solaris.
Cool, and not really horrible ;-) It's already this way in Solaris 9 (I
happen to have access to those sources and just checked), so we can
assume this is stable.
> Looking at dlinfo(RTLD_DI_LINKMAP):
>
> https://github.com/illumos/illumos-gate/blob/4e0c5eff9af325c80994e9527b7cb8b3a1ffd1d4/usr/src/cmd/sgs/rtld/common/dlfcns.c#L1927-L1934
I missed that because I initially looked only at public headers for
tlsmodid, and Rt_map is private to ld.so.1. This is intentionally
missing from dlinfo(3C), too. I only found it in <rtld_db.h>'s
rd_loadobj_t, but it seemed hard to apply librtld_db to the current
process instead of one being debugged...
> Interestingly, Solaris sets the first tlsmodid to zero.
>
> https://github.com/illumos/illumos-gate/blob/8a06b3d6467c15646e663c05086378f16288af85/usr/src/cmd/sgs/rtld/common/tls.c#L52-L60
>
> This is in stark contrast to what elf_shared expects, given that there's an
> assert that it is always non-zero if _tlsSize is set.
Right: 0 had been used for the tlsmodid of the main executable until
dlpi_tls_modid was added to dl_phdr_info for Solaris 11.5 (still in
beta) when this would-be incompatibility with the Linux and BSD versions
was noticed. It was only changed to 1 once it could be determined that
it was safe to do so.
>From gcc-bugs-return-640060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 23:20:09 2019
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Subject: [Bug target/88834] [SVE] Poor addressing mode choices for LD2 and ST2
Date: Mon, 08 Apr 2019 23:20:00 -0000
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--- Comment #12 from kugan at gcc dot gnu.org ---
(In reply to rsandifo@gcc.gnu.org from comment #10)
> (In reply to kugan from comment #9)
> > Created attachment 46040 [details]
> > patch
>
> Wasn't sure whether this patch was WIP or the final version
> for review, but we need to do something more generic than
> dividing by 4. I think the test will still fail with "int"
> changed to "short" for example.
>
> I also don't think the new candidate should be tied to the
> mask/load store functions. Maybe one approach would be to
> check when adding a zero-based candidate for a use in:
>
> /* Record common candidate with initial value zero. */
> basetype = TREE_TYPE (iv->base);
> if (POINTER_TYPE_P (basetype))
> basetype = sizetype;
> record_common_cand (data, build_int_cst (basetype, 0), iv->step, use);
>
> whether the use actually benefits from this unscaled iv.
> If the use is USE_REF_ADDRESS, we could compare the cost
> of an address with an unscaled index with the cost of an address
> with a scaled index. I think the natural scale value to try
> would be GET_MODE_INNER (TYPE_MODE (mem_type)).
Thanks for the comments. I agree this is the right place. But I am not sure if
checking the cost at this point is what IV opt generally does. In general,
IV-opt adds candidates which can be helpful and later decides the optimal set.
If we are to use get_computation_cost to see the costs, we have to create
iv_cand and then discard. Since we are adding only one candidate and that too
for SVE like targets, I am thinking that it is OK. If you still prefer to check
the cost, I will change that.
Attached patch (only the ivopt changes) and testcase
>From gcc-bugs-return-640061-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 23:21:50 2019
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Subject: [Bug target/88834] [SVE] Poor addressing mode choices for LD2 and ST2
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88834
kugan at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46040|0 |1
is obsolete| |
--- Comment #13 from kugan at gcc dot gnu.org ---
Created attachment 46103
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46103&action=edit
ivopt changes alone
>From gcc-bugs-return-640062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 23:27:45 2019
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Subject: [Bug target/88834] [SVE] Poor addressing mode choices for LD2 and ST2
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--- Comment #14 from kugan at gcc dot gnu.org ---
Created attachment 46104
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testcase
>From gcc-bugs-return-640063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 23:39:23 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Mon, 08 Apr 2019 23:39:00 -0000
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--- Comment #23 from kargl at gcc dot gnu.org ---
Created attachment 46105
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46105&action=edit
fix g++ problem with pow(z,0.5) where imag(z) = -0.
This patch has only been tested with the original test provided by the
reporter.
>From gcc-bugs-return-640064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 08 23:40:57 2019
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From: "kugan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/88834] [SVE] Poor addressing mode choices for LD2 and ST2
Date: Mon, 08 Apr 2019 23:40:00 -0000
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--- Comment #15 from kugan at gcc dot gnu.org ---
(In reply to Wilco from comment #11)
> There is also something odd with the way the loop iterates, this doesn't
> look right:
>
> whilelo p0.s, x3, x4
> incw x3
> ptest p1, p0.b
> bne .L3
I am not sure I understand this. I tried with qemu using an execution testcase
and It seems to work.
whilelo p0.s, x4, x5
incw x4
ptest p1, p0.b
bne .L3
In my case I have the above (register allocation difference only) incw is
correct considering two vector word registers? Am I missing something here?
>From gcc-bugs-return-640065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 01:35:58 2019
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From: "qrzhang at gatech dot edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/90017] New: gcc generates wrong debug information at -O3
Date: Tue, 09 Apr 2019 01:35:00 -0000
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Bug ID: 90017
Summary: gcc generates wrong debug information at -O3
Product: gcc
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It seems to be a recent regression, starting at r269302.
It only affects "-O3" and trunk.
The correct value is "l=0". With -O3, it generates l=8.
$ gcc-trunk -v
gcc version 9.0.1 20190408 (experimental) [trunk revision 270202] (GCC)
#correct output#
$ gcc-trunk -g abc.c
$ gdb -x cmds -batch a.out
Breakpoint 1 at 0x4004a5: file abc.c, line 15.
Breakpoint 1, main () at abc.c:15
15 optimize_me_not();
$1 = 0
#wrong output#
$ gcc-trunk -g abc.c -O3
$ gdb -x cmds -batch a.out
Breakpoint 1 at 0x400470: file abc.c, line 15.
Breakpoint 1, main () at abc.c:15
15 optimize_me_not();
$1 = 8
$ cat abc.c
__attribute__((noipa)) optimize_me_not(){
__asm__ volatile ("" : : : "memory");
}
int a, b;
int c[][2] = {{2}, {5}, 2};
int main() {
{
int l;
for (; b <= 1; b++) {
l = 0;
for (; l <= 8; l++) {
a ^= c[b + 1][b];
if (a)
optimize_me_not();
}
}
}
}
$ cat cmds
b 15
r
p l
k
q
>From gcc-bugs-return-640066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 02:07:19 2019
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Subject: [Bug tree-optimization/90018] New: [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 02:07:00 -0000
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Bug ID: 90018
Summary: [8 Regression] r265453 miscompiled 527.cam4_r in SPEC
CPU 2017
Product: gcc
Version: 8.3.1
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On x86-64 with AVX512, r265453 miscompiled 527.cam4_r in SPEC CPU 2017 with:
-march=native -Ofast -funroll-loops
527.cam4_r segfaults immediately. GCC 7 branch and master branch are OK.
>From gcc-bugs-return-640067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 02:19:49 2019
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Subject: [Bug target/90015] riscv: typo "intterupt" in diagnostic
Date: Tue, 09 Apr 2019 02:19:00 -0000
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Jim Wilson <wilson at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |wilson at gcc dot gnu.org
--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> ---
I tested Jakub's patch with 32-bit elf and 64-bit linux cross compilers. There
were no regressions. The patch is OK.
>From gcc-bugs-return-640068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 02:40:34 2019
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From: "JunMa at linux dot alibaba.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/89977] missing -Wstringop-overflow with an out-of-bounds int128_t range
Date: Tue, 09 Apr 2019 02:40:00 -0000
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--- Comment #5 from JunMa <JunMa at linux dot alibaba.com> ---
(In reply to Martin Sebor from comment #4)
> You're right that the conversion from int128_t to unsigned long can result
> in truncation, so the range of the result is that of unsigned long. Yet I
> suspect that relying on it is more likely unintentional and a bug. The
> question in my mind is whether narrowing int128_t conversions should be
> diagnosed just in these contexts (i.e., -Wstringop-overflow) or in others as
> well.
We have no idea whether these truncations is intentional or not in gcc side,
maybe we need a new option such as Wstringop-truncation to do this.
>From gcc-bugs-return-640069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 02:43:48 2019
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From: "redbeard0531 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90019] New: [8 regression] Bogus ambiguous overload error for NTTP pack of disjoint enable_ifs unless there is an unsupplied default argument
Date: Tue, 09 Apr 2019 02:43:00 -0000
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Bug ID: 90019
Summary: [8 regression] Bogus ambiguous overload error for NTTP
pack of disjoint enable_ifs unless there is an
unsupplied default argument
Product: gcc
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This code compiles fine with 7 and trunk but fails with gcc8:
https://godbolt.org/z/v1HN8B
#include <type_traits>
// gcc8 thinks these are ambiguous for <0>
template <int I, std::enable_if_t<I == 0, int>...> void foo(){}
template <int I, std::enable_if_t<I != 0, int>...> void foo(){}
// but somehow these arn't for <0>, but are for <0,0> !?
template <int I, int=0, std::enable_if_t<I == 0, int>...> void bar(){}
template <int I, int=0, std::enable_if_t<I != 0, int>...> void bar(){}
void test() {
bar<0>(); // works
bar<0,0>(); // boom
foo<0>(); // boom
}
>From gcc-bugs-return-640070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 04:32:07 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90020] New: [8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 04:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90020
Bug ID: 90020
Summary: [8 regression] -O2 -Os x86-64 wrong code generated for
GNU Emacs
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: eggert at cs dot ucla.edu
Target Milestone: ---
Created attachment 46106
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46106&action=edit
source code illustrating the bug
In:
https://lists.gnu.org/r/emacs-devel/2019-04/msg00209.html
Madhu reports several crashes when compiling applications with 'gcc -O2 -Os' on
x86-64. Madhu isolated the example to a crash with GNU Emacs, and I narrowed
this down to 'gcc -O2 -Os' generating incorrect code for Emacs. I further
narrowed it down to the attached file x.i. I used gcc 8.3.1 20190223 (Red Hat
8.3.1-2) on x86-64 to compile it like this:
gcc -O2 -Os -S x.i
and am attaching a copy of the input x.i and the output x.s. GCC miscompiled
the subroutine 'select_window'. The source code looks like this:
Lisp_Object
select_window (Lisp_Object window)
{
CHECK_TYPE (WINDOWP (window) && BUFFERP (XWINDOW (window)->contents),
builtin_lisp_symbol (1214), window);
struct window *w = XWINDOW (window);
return w->contents;
}
but the assembly language looks like this:
select_window:
pushq %rbp
pushq %rbx
movq %rdi, %rbx
pushq %rcx
call WINDOWP
movq 3(%rbx), %rbp
...
and that last movq is incorrect, because it dereferences %rbx ('window' in the
source code) even though it is not known whether WINDOWP returned true. In the
source code, if WINDOWP(window) returns false then 'window' is never used
except as an undereferenced pointer value, and it is possible for
WINDOWP(window) to return false without dereferencing 'window' so it is not
safe for the caller to assume that 'window' is dereferenceable. The incorrect
code causes GCC to dump core.
This problem does not occur with GCC 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04).
Madhu observed the problem with GCC 8.2 so I suspect the problem was introduced
in GCC 8.
I don't know which GCC component is causing the problem and am guessing
tree-optimization.
>From gcc-bugs-return-640071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 04:33:22 2019
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Subject: [Bug tree-optimization/90020] [8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 04:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90020
--- Comment #1 from eggert at cs dot ucla.edu ---
Created attachment 46107
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46107&action=edit
gcc -O2 -Os compiled output for x86-64
The attached x.s file shows the incorrect generated code, compiled with gcc -O2
-Os.
>From gcc-bugs-return-640072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 04:34:09 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 09 Apr 2019 04:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
--- Comment #40 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Are there any news on this?
>From gcc-bugs-return-640073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 04:46:15 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 04:46:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-09
Target Milestone|--- |8.4
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
r265452, which was backported to GCC 8 as r265453, caused the same failure
on trunk.
>From gcc-bugs-return-640074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 05:03:47 2019
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 05:03:00 -0000
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
On trunk, r265457 fixed 527.cam4_r in SPEC CPU 2017 with:
-march=native -Ofast -funroll-loops
>From gcc-bugs-return-640075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:00:32 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 09 Apr 2019 06:00:00 -0000
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--- Comment #41 from Iain Sandoe <iains at gcc dot gnu.org> ---
inconclusive so far, it's agreed that _Atomic is not a C++ keyword, but not
clear what is best solution to the SDK use.
If you filed a radar, please copy the number here (no-one else can see it, but
at least we can point the Apple devs to it - so they can look internally).
>From gcc-bugs-return-640077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:24:44 2019
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Subject: [Bug d/90013] wrong quotes in diagnostics
Date: Tue, 09 Apr 2019 06:24:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
It was the fault of the pot generator (well me I guess) that these sources got
picked up in the first place.
They are no longer part of gcc.pot. I don't know how this gets merged into
each individual .po, but they should not be present anymore.
>From gcc-bugs-return-640076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:24:02 2019
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Subject: [Bug d/90012] untranslateable placeholder in expressionsem.c
Date: Tue, 09 Apr 2019 06:24:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
It was the fault of the pot generator (well me I guess) that these sources got
picked up in the first place.
They are no longer part of gcc.pot. I don't know how this gets merged into
each individual .po, but they should not be present anymore.
>From gcc-bugs-return-640078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:29:58 2019
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Subject: [Bug tree-optimization/90021] New: [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90021
Bug ID: 90021
Summary: [9 Regression] ICE in index_in_loop_nest, at
tree-data-ref.h:587 since r270203
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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I see following ICE:
$ cat ice.f90
MODULE a
INTEGER b
CONTAINS
SUBROUTINE bar(c)
REAL c(1)
INTEGER d, e, f
DO g = 1,3
DO f = 1,1
DO e = 1,3
DO d = 1,1
c(f-1+d) = c(f-1+d)*b
END DO
END DO
END DO
END DO
END
END
$ gcc ice.f90 -fno-tree-loop-ivcanon -O1 -floop-interchange -fno-tree-ccp
-fno-tree-ch -fipa-pta -c
ice.f90:7:7:
7 | DO g = 1,3
| 1
Warning: Deleted feature: Loop variable at (1) must be integer
during GIMPLE pass: linterchange
ice.f90:4:0:
4 | SUBROUTINE bar(c)
|
internal compiler error: in index_in_loop_nest, at tree-data-ref.h:587
0x78219b index_in_loop_nest
/home/marxin/Programming/gcc/gcc/tree-data-ref.h:587
0x7837a7 index_in_loop_nest
/home/marxin/Programming/gcc/gcc/tree.h:3176
0x7837a7 add_multivariate_self_dist
/home/marxin/Programming/gcc/gcc/tree-data-ref.c:4392
0x7837a7 add_other_self_distances
/home/marxin/Programming/gcc/gcc/tree-data-ref.c:4445
0x7837a7 build_classic_dist_vector
/home/marxin/Programming/gcc/gcc/tree-data-ref.c:4565
0x7837a7 subscript_dependence_tester
/home/marxin/Programming/gcc/gcc/tree-data-ref.c:4798
0x7837a7 compute_affine_dependence(data_dependence_relation*, loop*)
/home/marxin/Programming/gcc/gcc/tree-data-ref.c:4853
0x156cf48 tree_loop_interchange_compute_ddrs
/home/marxin/Programming/gcc/gcc/gimple-loop-interchange.cc:1855
0x156cf48 prepare_perfect_loop_nest
/home/marxin/Programming/gcc/gcc/gimple-loop-interchange.cc:2031
0x156cf48 execute
/home/marxin/Programming/gcc/gcc/gimple-loop-interchange.cc:2072
0x156cf48 execute
/home/marxin/Programming/gcc/gcc/gimple-loop-interchange.cc:2060
>From gcc-bugs-return-640079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:30:40 2019
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Subject: [Bug tree-optimization/90021] [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Last reconfirmed| |2019-4-9
CC| |amker at gcc dot gnu.org
Known to work| |8.3.0
Target Milestone|--- |9.0
Known to fail| |9.0
>From gcc-bugs-return-640080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:35:22 2019
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Subject: [Bug tree-optimization/90021] [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
Date: Tue, 09 Apr 2019 06:35:00 -0000
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--- Comment #1 from bin cheng <amker at gcc dot gnu.org> ---
Sorry for the breakage, I will have a look.
>From gcc-bugs-return-640081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:38:42 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/90015] riscv: typo "intterupt" in diagnostic
Date: Tue, 09 Apr 2019 06:38:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 9 06:38:07 2019
New Revision: 270221
URL: https://gcc.gnu.org/viewcvs?rev=270221&root=gcc&view=rev
Log:
PR target/90015
* config/riscv/riscv.c (riscv_get_interrupt_type): Fix comment typo.
(riscv_merge_decl_attributes): Fix typo in diagnostics. Remove
trailing period from it too.
* gcc.target/riscv/interrupt-conflict-mode.c (foo): Adjust expected
diagnostics.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/riscv/riscv.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/riscv/interrupt-conflict-mode.c
>From gcc-bugs-return-640082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:48:24 2019
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Subject: [Bug tree-optimization/90020] [8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-09
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Let me take a look.
>From gcc-bugs-return-640083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:52:26 2019
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Subject: [Bug fortran/90022] New: Issue with CFI_is_contigous and CFI base address
Date: Tue, 09 Apr 2019 06:52:00 -0000
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Bug ID: 90022
Summary: Issue with CFI_is_contigous and CFI base address
Product: gcc
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Status: UNCONFIRMED
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See https://gcc.gnu.org/ml/fortran/2019-04/msg00013.html for the issue and a
testcase.
Paul
>From gcc-bugs-return-640084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:53:10 2019
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Paul Thomas <pault at gcc dot gnu.org> ---
I will be submitting a patch for this shortly.
Paul
>From gcc-bugs-return-640085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 06:55:41 2019
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From: "kangshan0910 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #33 from 康 çŠ <kangshan0910 at hotmail dot com> ---
(In reply to Martin Liška from comment #32)
> I can confirm it works for me with:
>
> diff --git a/common.gypi b/common.gypi
> index 9502e92..3d8f04f 100644
> --- a/common.gypi
> +++ b/common.gypi
> @@ -195,8 +195,8 @@
> 'ldflags': ['<(pgo_use)'],
> },],
> ['enable_lto=="true"', {
> - 'cflags': ['<(lto)'],
> - 'ldflags': ['<(lto)'],
> + 'cflags': ['<(lto) -fno-strict-aliasing'],
> + 'ldflags': ['<(lto) -fno-strict-aliasing'],
> },],
> ],
> },],
It seems your solution works. But it doesn't work if I add
"-fno-strict-aliasing" through 'export CFLAGS="$CFLAGS -O3
-fno-strict-aliasing..." export CXXFLAGS="$CXXFLAGS -O3
-fno-strict-aliasing..." ...', maybe they are overridden. Thank you very much
for your help.
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Subject: [Bug ipa/89893] Segmentation fault always occurs when node app is generated by gcc-8-branch@268745
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--- Comment #34 from Martin Liška <marxin at gcc dot gnu.org> ---
> It seems your solution works. But it doesn't work if I add
> "-fno-strict-aliasing" through 'export CFLAGS="$CFLAGS -O3
> -fno-strict-aliasing..." export CXXFLAGS="$CXXFLAGS -O3
> -fno-strict-aliasing..." ...', maybe they are overridden. Thank you very
> much for your help.
Please consult questions about nodejs build system with their developers.
>From gcc-bugs-return-640087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 07:31:39 2019
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk.
>From gcc-bugs-return-640088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 07:37:11 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #42 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I filed an APPLE bug report:
https://bugreport.apple.com/web/?problemID=49727047
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Subject: [Bug gcov-profile/90023] New: The coverage of a label is incorrect when it is after a return statement and followed by a blank statement
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Bug ID: 90023
Summary: The coverage of a label is incorrect when it is after
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$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.2.0-1ubuntu2~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04)
$ cat small.c
#include <stdio.h>
int foo(int a)
{
void *l = &&error;
if(a == 4)
; //goto *l;
return 150;
error:
;// return a;
}
int main(int argc, char **argv)
{
printf("value: %d\n", foo(argc));
return 0;
}
$ gcc -w --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
value: 150
File 'small.c'
Lines executed:100.00% of 7
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:#include <stdio.h>
-: 2:
1: 3:int foo(int a)
-: 4:{
1: 5: void *l = &&error;
-: 6:
-: 7: if(a == 4)
-: 8: ; //goto *l;
-: 9:
2: 10: return 150;
-: 11:
1: 12:error:
-: 13:;// return a;
-: 14:}
-: 15:
1: 16:int main(int argc, char **argv)
-: 17:{
1: 18: printf("value: %d\n", foo(argc));
-: 19:
1: 20: return 0;
-: 21:}
Line #12 is wrongly marked as executed and Line #10 is wrongly marked as
executed twice.
When, Line #8 and Line #13 are not commented, the coverage is correct as:
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:#include <stdio.h>
-: 2:
1: 3:int foo(int a)
-: 4:{
1: 5: void *l = &&error;
-: 6:
1: 7: if(a == 4)
#####: 8: goto *l;
-: 9:
1: 10: return 150;
-: 11:
#####: 12:error:
#####: 13: return a;
-: 14:}
-: 15:
1: 16:int main(int argc, char **argv)
-: 17:{
1: 18: printf("value: %d\n", foo(argc));
-: 19:
1: 20: return 0;
-: 21:}
>From gcc-bugs-return-640090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 07:57:08 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 07:57:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
CC| |rguenth at gcc dot gnu.org
Summary|[8 regression] -O2 -Os |[7/8/9 regression] -O2 -Os
|x86-64 wrong code generated |x86-64 wrong code generated
|for GNU Emacs |for GNU Emacs
Known to fail| |7.4.0, 8.3.0, 9.0
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I can confirm that even though the code is not so nice :)
I have 2 versions of the reduced test-case:
1)
$ gcc emacs0.c -Os -fno-strict-aliasing -g && valgrind ./a.out
==20746== Memcheck, a memory error detector
==20746== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==20746== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==20746== Command: ./a.out
==20746==
==20746== Invalid read of size 8
==20746== at 0x4011CF: select_window (emacs0.c:116)
==20746== by 0x40105A: main (emacs0.c:126)
==20746== Address 0xa is not stack'd, malloc'd or (recently) free'd
fails for 4.8.0+ except 4.9.x releases.
2)
$ gcc emacs.c -Os -fno-strict-aliasing && ./a.out
started failing with r238242
The problematic transformation:
<bb 2> [local count: 1073741824]:
_1 = PSEUDOVECTORP (window_6(D));
pretmp_9 = MEM[(struct window *)window_6(D)].contents;
if (_1 != 0)
goto <bb 3>; [50.00%]
else
goto <bb 4>; [50.00%]
happens in PRE. Richi can you please take a look?
>From gcc-bugs-return-640091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 07:57:35 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 46108
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46108&action=edit
Reduced test-case #0
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 46109
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46109&action=edit
Reduced test-case #1
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
>From gcc-bugs-return-640094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 08:09:14 2019
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 08:09:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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CC| |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Richi do you want a help with a test-case reduction? Or is it a known issue
that has been fixed on trunk?
>From gcc-bugs-return-640095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 08:12:10 2019
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Subject: [Bug gcov-profile/90023] The coverage of a label is incorrect when it is after a return statement and followed by a blank statement
Date: Tue, 09 Apr 2019 08:12:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-09
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, but again it's very low priority as it contains an empty basic
block.
>From gcc-bugs-return-640096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 08:18:32 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 08:18:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I bisected GCC 4.9.x branch and it started with r215059, which is a backport of
3 patches. I reverted changes in:
patching file gcc/recog.c
patching file gcc/tree-ssa-loop-niter.c
patching file gcc/tree-vect-slp.c
and so that it points to backport of PR61672.
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Subject: [Bug preprocessor/64965] __FILE__ doesn't work if the filename contains newline
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Rasmus Villemoes <rv at rasmusvillemoes dot dk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #8 from Rasmus Villemoes <rv at rasmusvillemoes dot dk> ---
Fixed by r253605
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Subject: [Bug c++/90010] [8/9 Regression] valgrind error with snprintf and -Wall
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-09
CC| |marxin at gcc dot gnu.org,
| |msebor at gcc dot gnu.org
Known to work| |7.3.0
Target Milestone|--- |8.4
Summary|valgrind error with |[8/9 Regression] valgrind
|snprintf and -Wall |error with snprintf and
| |-Wall
Ever confirmed|0 |1
Known to fail| |8.3.0, 9.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r247401.
>From gcc-bugs-return-640099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 09:09:38 2019
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Subject: [Bug tree-optimization/46590] long compile time with -O2 and many loops
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #55 from Martin Liška <marxin at gcc dot gnu.org> ---
Just for the record, it improved significantly compile time of test-cases
provided in PR69609, PR38518, PR36262:
https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=11.603.8
https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=11.618.8
https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=11.630.8
>From gcc-bugs-return-640100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 09:43:43 2019
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/90021] [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
Date: Tue, 09 Apr 2019 09:43:00 -0000
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--- Comment #2 from bin cheng <amker at gcc dot gnu.org> ---
We have {{0, +, 1}_6, +, 1}_4 in this case, and _6 is an outer loop of
loop_nest. Function add_multivariate_self_dist was intentionally skipped in
PR89725 patch, but control flow gets to it because
1) In analyze_miv_subscript, equal access_fn case is specially handled,
rather than general miv analysis.
2) In add_other_self_distances, evolution_function_is_univariate_p returns
false for above access_fn.
It looks we can also introduce another parameter loopnum to
evolution_function_is_univariate_p, just like
evolution_function_is_affine_multivariate_p to consider outer loop's chrec as
invariant symbol here. OTOH, making changes in add_multivariate_self_dist
still doesn't seem right in this case.
>From gcc-bugs-return-640101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:08:04 2019
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Priority|P4 |P1
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Uhm, unfortunately a tiny modification of the original testcase uncovers an ICE
on valid:
template<typename SX, typename ...XE> void
fk (XE..., int/*SW*/);
void
w9 (void)
{
fk<int> (0);
}
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--- Comment #16 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to kugan from comment #15)
> (In reply to Wilco from comment #11)
> > There is also something odd with the way the loop iterates, this doesn't
> > look right:
> >
> > whilelo p0.s, x3, x4
> > incw x3
> > ptest p1, p0.b
> > bne .L3
>
> I am not sure I understand this. I tried with qemu using an execution
> testcase and It seems to work.
>
> whilelo p0.s, x4, x5
> incw x4
> ptest p1, p0.b
> bne .L3
> In my case I have the above (register allocation difference only) incw is
> correct considering two vector word registers? Am I missing something here?
I'm talking about the completely redundant ptest, where does that come from?
>From gcc-bugs-return-640103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:10:06 2019
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Subject: [Bug c++/90010] [8/9 Regression] valgrind error with snprintf and -Wall
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-640104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:12:57 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #43 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 46110
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46110&action=edit
Proof-of-principle path
Does this work for you?
- my local testing says it generates the right wrapped include file.
(perhaps the constraint on darwin version was too tight in Erik's case)
>From gcc-bugs-return-640105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:15:59 2019
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Subject: [Bug tree-optimization/90018] [8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 10:15:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P2
Status|NEW |ASSIGNED
Known to work| |8.2.0, 9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Summary|[8 Regression] r265453 |[8/9 Regression] r265453
|miscompiled 527.cam4_r in |miscompiled 527.cam4_r in
|SPEC CPU 2017 |SPEC CPU 2017
Known to fail| |8.3.0
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine. Even though the issue doesn't appear on trunk the referenced revision
doesn't fix a bug but a missed optimization so the issue must be latent on
trunk.
Martin, if you can help with a testcase that would be great (in case you have a
working setup / methology to track this down). Otherwise I'll of course see to
do that myself.
>From gcc-bugs-return-640107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:19:35 2019
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Subject: [Bug c++/90019] [8 regression] Bogus ambiguous overload error for NTTP pack of disjoint enable_ifs unless there is an unsupplied default argument
Date: Tue, 09 Apr 2019 10:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |7.4.0, 9.0
Version|9.0 |8.3.0
Keywords| |rejects-valid
Last reconfirmed| |2019-04-09
Ever confirmed|0 |1
Target Milestone|--- |8.4
Known to fail| |8.1.0, 8.3.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Also seems to work on trunk, but it seems it was only fixed recently. So maybe
this one has a duplicate.
>From gcc-bugs-return-640106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:19:30 2019
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Subject: [Bug tree-optimization/90018] [8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
> Martin, if you can help with a testcase that would be great (in case you
> have a working setup / methology to track this down). Otherwise I'll of
> course see to do that myself.
I'll do it for you.
>From gcc-bugs-return-640108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:22:56 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-640110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:25:40 2019
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Subject: [Bug target/88834] [SVE] Poor addressing mode choices for LD2 and ST2
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--- Comment #17 from kugan at gcc dot gnu.org ---
(In reply to Wilco from comment #16)
> (In reply to kugan from comment #15)
> > (In reply to Wilco from comment #11)
> > > There is also something odd with the way the loop iterates, this doesn't
> > > look right:
> > >
> > > whilelo p0.s, x3, x4
> > > incw x3
> > > ptest p1, p0.b
> > > bne .L3
> >
> > I am not sure I understand this. I tried with qemu using an execution
> > testcase and It seems to work.
> >
> > whilelo p0.s, x4, x5
> > incw x4
> > ptest p1, p0.b
> > bne .L3
> > In my case I have the above (register allocation difference only) incw is
> > correct considering two vector word registers? Am I missing something here?
>
> I'm talking about the completely redundant ptest, where does that come from?
It is https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88836
>From gcc-bugs-return-640109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:25:18 2019
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Subject: [Bug tree-optimization/90021] [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
Date: Tue, 09 Apr 2019 10:25:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Suppose Bin will handle this.
>From gcc-bugs-return-640111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:26:48 2019
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Subject: [Bug middle-end/89998] [7/8/9 regression] ICE: verify_gimple failed in printf-return-value
Date: Tue, 09 Apr 2019 10:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89998
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 9 10:26:13 2019
New Revision: 270224
URL: https://gcc.gnu.org/viewcvs?rev=270224&root=gcc&view=rev
Log:
PR tree-optimization/89998
* gimple-ssa-sprintf.c (try_substitute_return_value): Use lhs type
instead of integer_type_node if possible, don't add ranges if return
type is not compatible with int.
* gimple-fold.c (gimple_fold_builtin_sprintf,
gimple_fold_builtin_snprintf): Use lhs type instead of hardcoded
integer_type_node.
* gcc.c-torture/compile/pr89998-1.c: New test.
* gcc.c-torture/compile/pr89998-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr89998-1.c
trunk/gcc/testsuite/gcc.c-torture/compile/pr89998-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/gimple-ssa-sprintf.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:27:49 2019
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Subject: [Bug translation/90011] [9 Regression] trailing space in diagnostic
Date: Tue, 09 Apr 2019 10:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90011
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 9 10:27:14 2019
New Revision: 270225
URL: https://gcc.gnu.org/viewcvs?rev=270225&root=gcc&view=rev
Log:
PR translation/90011
* ipa-devirt.c (compare_virtual_tables): Remove two trailing spaces
from diagnostics.
* config/arm/freebsd.h (LINK_SPEC): Remove trailing space from -p
diagnostics.
* config/riscv/freebsd.h (LINK_SPEC): Likewise.
* config/aarch64/aarch64-freebsd.h (FBSD_TARGET_LINK_SPEC): Likewise.
* config/darwin.h (DRIVER_SELF_SPECS, ASM_FINAL_SPEC): Remove
trailing space from -gsplit-dwarf diagnostics.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64-freebsd.h
trunk/gcc/config/arm/freebsd.h
trunk/gcc/config/darwin.h
trunk/gcc/config/riscv/freebsd.h
trunk/gcc/ipa-devirt.c
>From gcc-bugs-return-640113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:30:35 2019
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Subject: [Bug target/89794] wrong code with -Og -fno-forward-propagate
Date: Tue, 09 Apr 2019 10:30:00 -0000
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--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> Guess with PR89475 fix this will be latent, unless one disables ccp.
> Anyway, to me this looks like a backend bug. The function is leaf, but for
> some strange reason LRA uses the lr register and so lr needs to be pushed
> and poped, but that push/pop doesn't seem to be accounted for in the afp to
> sp elimination offset computation.
I'm still seeing it in a build from 2019/04/04, so not latent.
Current suspect is the code in arm_compute_elimination_offset (in arm.c), where
we eliminate from the arg pointer to the stack pointer. The comment says that
if there has been nothing pushed on the stack at all, then the offset result
should be '-4' (and asserts strongly in the comments that this is the correct
result) --- I don't understand why that should be the case. However, that code
is essentially 18 years old, so I'm not going to try messing with it until I
understand it better.
>From gcc-bugs-return-640114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:38:47 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90024] New: [7/8/9 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Tue, 09 Apr 2019 10:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90024
Bug ID: 90024
Summary: [7/8/9 Regression] ICE on AArch32 NEON mov with TImode
constant.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code, patch
Severity: normal
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Reporter: matmal01 at gcc dot gnu.org
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Created attachment 46111
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46111&action=edit
Proposed fix
The below code causes an ICE for AArch32 targets with NEON at all optimisation
levels except -O0.
union a {
char b;
long long c;
};
union a d;
int g(int, union a, union a);
void e() {
union a f[2] = {-1L};
g(0, d, f[0]);
}
With the backtrace below.
$ arm-none-eabi-gcc -march=armv8-a -c test.c -O1 -mfloat-abi=hard
-mfpu=neon-fp-armv8
during RTL pass: final
test.c: In function 'e':
test.c:10:1: internal compiler error: in output_950, at config/arm/neon.md:89
10 | }
| ^
0x1352bfb output_950
/tmp/dgboter/bbs/rhev-vm4--rhe6x86_64/buildbot/rhe6x86_64--arm-none-eabi/build/src/gcc/gcc/config/arm/neon.md:89
0x8aafbd get_insn_template(int, rtx_insn*)
/tmp/dgboter/bbs/rhev-vm4--rhe6x86_64/buildbot/rhe6x86_64--arm-none-eabi/build/src/gcc/gcc/final.c:2071
.... <snip> ....
I have a patch to fix the problem, creating a bugzilla report for tracking
purposes (patch added as attachment, the explanation will be added in
comments).
>From gcc-bugs-return-640115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:52:02 2019
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Subject: [Bug target/90024] [7/8/9 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Tue, 09 Apr 2019 10:52:00 -0000
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Matthew Malcomson <matmal01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Known to work| |4.9.0
--- Comment #1 from Matthew Malcomson <matmal01 at gcc dot gnu.org> ---
The "*neon_mov<mode>" patterns for 128 bit sized quantities uses the "Dn"
constraint to match vmov.f32 and vmov.i<vec-width> patterns.
This constraint boils down to using the `neon_immediate_valid` function.
Once the constraint has matched, the output C statement asserts the same
function
passes.
The output C statement calls `neon_immediate_valid` with the mode taken from
the
iterator, while the constraint takes the mode from the operand.
In the above testcase the operand is a CONST_INT, which means the constraint
passes VOIDmode (treated the same as DImode in `neon_immediate_valid`), while
the C statement passes TImode (the mode of the iterator).
This causes second call to `neon_immediate_valid` to fail as the value provided
is only valid in DImode but not TImode, and that causes the ICE.
The attached patch splits the original "Dn" constraint into three new
constraints, "DN" for TImode CONST_INT, "Dn" for DImode CONST_INT, and "Dm" for
CONST_VECTOR.
This requires one extra alternative in the "*neon_mov<mode>" patterns, but
makes it clear from the constraint what mode is being used.
We use the "DN" constraint for the define_insn that matches TImode values, and
hence avoid the above problem.
>From gcc-bugs-return-640117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:57:59 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90025] [9 Regression] botan2 miscompilation on s390x-linux since r268957
Date: Tue, 09 Apr 2019 10:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-09
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
>From gcc-bugs-return-640116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 10:57:42 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90025] New: [9 Regression] botan2 miscompilation on s390x-linux since r268957
Date: Tue, 09 Apr 2019 10:57:00 -0000
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Bug ID: 90025
Summary: [9 Regression] botan2 miscompilation on s390x-linux
since r268957
Product: gcc
Version: 9.0
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The following testcase is miscompiled e.g. with -O2 -march=zEC12 -mtune=z13 on
s390x-linux:
__attribute__((noipa)) void
bar (char *p)
{
int i;
for (i = 0; i < 6; i++)
if (p[i] != "foobar"[i])
__builtin_abort ();
for (; i < 32; i++)
if (p[i] != '\0')
__builtin_abort ();
}
__attribute__((noipa)) void
foo (unsigned int x)
{
char s[32] = { 'f', 'o', 'o', 'b', 'a', 'r', 0 };
((unsigned int *) s)[2] = __builtin_bswap32 (x);
bar (s);
}
int
main ()
{
foo (0);
return 0;
}
The problem is that since that change we emit a store_by_pieces (8 bytes)
followed by clear_storage (24 bytes), but the object we pass to the latter
actually has S1, so DSE2 then happily removes it when it sees a further store
of 4 bytes to s+8.
>From gcc-bugs-return-640118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:04:56 2019
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Subject: [Bug tree-optimization/90018] [8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 11:04:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I've just tested that on -march=skylake-avx512:
model name : Intel(R) Xeon(R) Platinum 8164 CPU @ 2.00GHz
r265451 works for me, but I had to increase a stack limit. With default limit
8192 I hit segfault here:
Program received signal SIGSEGV, Segmentation fault.
0x00000000008c890f in dyn_comp::dyn_run (ptop=219.4067000000008, ndt=1800,
te0=0, dyn_state=..., dyn_in=..., dyn_out=..., rc=-1) at
dyn_comp.fppized.f90:1142
1142 call t_startf ('dyn_run_alloc')
(gdb) bt
#0 0x00000000008c890f in dyn_comp::dyn_run (ptop=219.4067000000008, ndt=1800,
te0=0, dyn_state=..., dyn_in=..., dyn_out=..., rc=-1) at
dyn_comp.fppized.f90:1142
#1 0x00000000009e18f9 in stepon::stepon_run1 (dtime_out=<optimized out>,
phys_state=..., phys_tend=..., dyn_in=..., dyn_out=...) at
stepon.fppized.f90:427
#2 0x0000000000a27840 in cam_comp::cam_run1 (cam_in=..., cam_out=...) at
cam_comp.fppized.f90:195
#3 0x0000000000a50a04 in atm_comp_mct::atm_init_mct (eclock=..., cdata_a=...,
x2a_a=..., a2x_a=..., nlfilename=<error reading variable: value requires
4200145 bytes, which is more than max-value-size>,
_nlfilename=_nlfilename@entry=0) at atm_comp_mct.fppized.f90:349
#4 0x0000000000ab0f02 in ccsm_comp_mod::ccsm_init () at
ccsm_comp_mod.fppized.f90:1577
#5 0x0000000000402bcd in ccsm_driver () at ccsm_driver.fppized.f90:57
#6 main (argc=<optimized out>, argv=<optimized out>) at
ccsm_driver.fppized.f90:25
#7 0x00007ffff6e35ea7 in __libc_start_main () from /lib64/libc.so.6
@H.J. Can you please check the stack limit?
>From gcc-bugs-return-640119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:07:20 2019
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88809] do not use rep-scasb for inline strlen/memchr
Date: Tue, 09 Apr 2019 11:07:00 -0000
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Peter Cordes <peter at cordes dot ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |peter at cordes dot ca
--- Comment #4 from Peter Cordes <peter at cordes dot ca> ---
Yes, rep scasb is abysmal, and gcc -O3's 4-byte-at-a-time scalar loop is not
very good either.
With 16-byte alignment, (which we have from calloc on x86-64 System V), we can
inline a *much* better SSE2 loop. See
https://stackoverflow.com/a/55589634/224132 for more details and
microbenchmarks;
On Skylake it's about 4 to 5x faster than the current 4-byte loop for large
strings, 3x faster for short strings. For short strings (strlen=33), it's
about 1.5x faster than calling strlen. For very large strings (too big for L2
cache), it's ~1.7x slower than glibc's AVX2 strlen.
The lack of VEX encoding for pxor and pmovmskb is just me being lazy; let gcc
emit them all with VEX if AVX is enabled.
# at this point gcc has `s` in RDX, `i` in ECX
pxor %xmm0, %xmm0 # zeroed vector to compare against
.p2align 4
.Lstrlen16: # do {
#ifdef __AVX__
vpcmpeqb (%rdx), %xmm0, %xmm1
#else
movdqa (%rdx), %xmm1
pcmpeqb %xmm0, %xmm1 # xmm1 = -1 where there was a 0 in memory
#endif
add $16, %rdx # ptr++
pmovmskb %xmm1, %eax # extract high bit of each byte to a
16-bit mask
test %eax, %eax
jz .Lstrlen16 # }while(mask==0);
# RDX points at the 16-byte chunk *after* the one containing the terminator
# EAX = bit-mask of the 0 bytes, and is known to be non-zero
bsf %eax, %eax # EAX = bit-index of the lowest set bit
# terminator is at rdx+rax - 16
# movb $'A', -16(%rdx, %rax) // for a microbench that used
s[strlen(s)]='A'
sub %rbp, %rdx # p -= start
lea -16(%rdx, %rax) # p += byte_within_vector - 16
We should actually use REP BSF because that's faster on AMD (tzcnt), and same
speed on Intel.
Also an inline-asm implementation of it with a microbenchmark adapted from the
SO question. (Compile with -DUSE_ASM -DREAD_ONLY to benchmark a fixed length
repeatedly)
https://godbolt.org/z/9tuVE5
It uses clock() for timing, which I didn't bother updating. I made it possible
to run it for lots of iterations for consistent timing. (And so the real work
portion dominates the runtime so we can use perf stat to measure it.)
----
If we only have 4-byte alignment, maybe check the first 4B, then do (p+4) & ~7
to either overlap that 4B again or not when we start 8B chunks. But probably
it's good to get to 16-byte alignment and do whole SSE2 vectors, because
repeating an aligned 16-byte test that overlaps an 8-byte test costs the same
as doing another 8-byte test. (Except on CPUs like Bobcat that split 128-bit
vectors into 64-bit halves). The extra AND to round down to an alignment
boundary is all it takes, plus the code-size cost of peeling 1 iteration each
of 4B and 8B before a 16-byte loop.
We can use 4B / 8B with movd / movq instead of movdqa. For pmovmskb, we can
ignore the compare-true results for the upper 8 bytes by testing the result
with `test %al,%al`, or in general with `test $0x0F, %al` to check only the low
4 bits of EAX for the 4-byte case.
----
The scalar bithack version can use BSF instead of CMOV binary search for the
byte with a set high bit. That should be a win if we ever wanted to do scalar
on some x86 target especially with 8-byte registers, or on AArch64. AArch64
can rbit / clz to emulate bsf and find the position of the first set bit.
(Without efficient SIMD compare result -> integer_mask, or efficient SIMD ->
integer at all on some ARM / AArch64 chips, SIMD compares for search loops
aren't always (ever?) a win. IIRC, glibc strlen and memchr don't use vectors
on ARM / AArch64, just scalar bithacks.)
>From gcc-bugs-return-640120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:12:06 2019
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Subject: [Bug middle-end/90025] [9 Regression] botan2 miscompilation on s390x-linux since r268957
Date: Tue, 09 Apr 2019 11:12:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46112
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46112&action=edit
gcc9-pr90025.patch
Untested fix.
>From gcc-bugs-return-640121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:13:49 2019
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/88834] [SVE] Poor addressing mode choices for LD2 and ST2
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--- Comment #18 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to kugan from comment #12)
> (In reply to rsandifo@gcc.gnu.org from comment #10)
> > (In reply to kugan from comment #9)
> > > Created attachment 46040 [details]
> > > patch
> >
> > Wasn't sure whether this patch was WIP or the final version
> > for review, but we need to do something more generic than
> > dividing by 4. I think the test will still fail with "int"
> > changed to "short" for example.
> >
> > I also don't think the new candidate should be tied to the
> > mask/load store functions. Maybe one approach would be to
> > check when adding a zero-based candidate for a use in:
> >
> > /* Record common candidate with initial value zero. */
> > basetype = TREE_TYPE (iv->base);
> > if (POINTER_TYPE_P (basetype))
> > basetype = sizetype;
> > record_common_cand (data, build_int_cst (basetype, 0), iv->step, use);
> >
> > whether the use actually benefits from this unscaled iv.
> > If the use is USE_REF_ADDRESS, we could compare the cost
> > of an address with an unscaled index with the cost of an address
> > with a scaled index. I think the natural scale value to try
> > would be GET_MODE_INNER (TYPE_MODE (mem_type)).
>
> Thanks for the comments. I agree this is the right place. But I am not sure
> if checking the cost at this point is what IV opt generally does. In
> general, IV-opt adds candidates which can be helpful and later decides the
> optimal set.
But I was talking about comparing the cost of the address rather
than the cost of the iv. Like you say, the idea is to add candidates
that might be useful, and what we want to know here is whether the
bytes offset is likely to be a useful candidate for this use.
Another way of deciding whether to go for a scaled candidate would
be to test for a legitimate address directly (rather than via
address costs) if you prefer that. I just thought using address
costs might be easier.
We could also keep the unscaled candidate in addition to the
new scaled one if we have evidence that having both is useful.
The danger is that if we add too many, we'll trip the iv limit,
so I think we'd need positive evidence for keeping both.
> If we are to use get_computation_cost to see the costs, we have to create
> iv_cand and then discard. Since we are adding only one candidate and that
> too for SVE like targets, I am thinking that it is OK. If you still prefer
> to check the cost, I will change that.
IMO it's a generic concept that just happens to apply to SVE.
If an architecture is going to support just one "reg+reg" addressing
mode, the two obvious choices are for the offset register to be unscaled
(bytes) or scaled by the element or access size (indices). SVE chose
the latter. In that case, the most useful candidate is likely to be
the index rather than the byte offset.
This applies to single-vector loads and stores as well as
LOAD/STORE_LANES. The reason we usually get good iv choices
for single vectors is that the index usually exists as a candidate
already, in the form of the loop control iv. (This is of course the
main benefit to base+scaled addressing over base+unscaled addressing.)
But it's probably possible to construct examples in which the
index candidate doesn't already exist even for single vectors.
> Attached patch (only the ivopt changes) and testcase
>From gcc-bugs-return-640122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:14:36 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 11:14:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
So looking at one issue I can see is code-hoisting hoisting
MEM[(struct window *)window_6(D) + -5B].contents across a call that might
not return. This can only happen for calls we can alias-disambiguate
against which means in this case pure calls. For example for divisions
we guard against this case my checking whether it may trap and there
was an earlier call that might not return. That is missing for memory
referneces.
<bb 2> [local count: 1073741824]:
# VUSE <.MEM_5(D)>
_1 = WINDOWP (window_6(D));
if (_1 != 0)
goto <bb 3>; [50.00%]
else
goto <bb 4>; [50.00%]
<bb 3> [local count: 536870913]:
# VUSE <.MEM_5(D)>
_2 = MEM[(struct window *)window_6(D) + -5B].contents;
# VUSE <.MEM_5(D)>
_3 = BUFFERP (_2);
_8 = (int) _3;
<bb 4> [local count: 1073741824]:
# iftmp.1_4 = PHI <_8(3), 0(2)>
# VUSE <.MEM_5(D)>
CHECK_TYPE (iftmp.1_4, 4856B, window_6(D));
# VUSE <.MEM_5(D)>
_7 = MEM[(struct window *)window_6(D) + -5B].contents;
# VUSE <.MEM_5(D)>
return _7;
But fixing that on the GIMPLE level doesn't make the issue go away since
we have similar functionality on RTL which triggers (and is the older
issue since GIMPLE can do hoisting only since GCC 7).
>From gcc-bugs-return-640123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:15:18 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 11:15:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
I have a patch for GIMPLE and will produce a nicer testcase for that. Will
also look at the RTL hoisting issue.
>From gcc-bugs-return-640124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:26:53 2019
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 09 Apr 2019 11:26:00 -0000
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--- Comment #44 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Iain Sandoe from comment #43)
> Created attachment 46110 [details]
> Proof-of-principle path
>
> Does this work for you?
> - my local testing says it generates the right wrapped include file.
>
> (perhaps the constraint on darwin version was too tight in Erik's case)
Sorry for my ignorance, but how do I apply this? Do I just patch, and then
configure and compile/bootstrap as a normal svn checkout, or do I have to do
anything special regarding the fixincludes? And if so, is there a link to some
documentation?
>From gcc-bugs-return-640125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:29:31 2019
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Subject: [Bug middle-end/89998] [7/8 regression] ICE: verify_gimple failed in printf-return-value
Date: Tue, 09 Apr 2019 11:29:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 regression] ICE: |[7/8 regression] ICE:
|verify_gimple failed in |verify_gimple failed in
|printf-return-value |printf-return-value
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for trunk. As a workaround I'd suggest using a correct prototype or
-fno-builtin-sprintf if you intentionally use a different one.
>From gcc-bugs-return-640126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:40:37 2019
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Subject: [Bug target/90024] [7/8/9 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Tue, 09 Apr 2019 11:40:00 -0000
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--- Comment #2 from Matthew Malcomson <matmal01 at gcc dot gnu.org> ---
Author: matmal01
Date: Tue Apr 9 11:39:59 2019
New Revision: 270226
URL: https://gcc.gnu.org/viewcvs?rev=270226&root=gcc&view=rev
Log:
Hi there,
The "*neon_mov<mode>" patterns for 128 bit sized quantities uses the "Dn"
constraint to match vmov.f32 and vmov.i<vec-width> patterns.
This constraint boils down to using the `neon_immediate_valid` function.
Once the constraint has matched, the output C statement asserts that function
passes.
The output C statement calls `neon_immediate_valid` with the mode taken from
the
iterator, while the constraint takes the mode from the operand.
This can cause a discrepency when the operand is a CONST_INT, as the constraint
passes VOIDmode which `neon_immediate_valid` treats as DImode, while the C
statement passes the mode of the iterator which can be TImode.
When this happens, the `neon_immediate_valid` can fail in the second call (if
e.g. the CONST_INT is a valid immediate in DImode but not TImode) which would
trigger the assertion.
The testcase added with this patch triggers this when compiled with an arm
cross
compiler using the command line below.
gcc -march=armv8-a -c neon-immediate-timode.c -O1 -mfloat-abi=hard
-mfpu=neon-fp-armv8
This patch splits the original "Dn" constraint into three new constraints, "DN"
for TImode CONST_INT, "Dn" for DImode CONST_INT, and "Dm" for CONST_VECTOR.
Splitting things up this way requires using one extra alternative in the
"*neon_mov<mode>" patterns, but makes it clear from the constraint what mode is
being used.
We also remove the behaviour of treating VOIDmode as DImode in
`neon_valid_immediate` since the original "Dn" constraint was the only place
that functionality was used. VOIDmode is now never passed to that function.
An assertion has been added to the function to ensure this problem is caught
earlier on.
Bootstrapped on arm-none-linux-gnueabihf
Regtested on cross-compiler arm-none-eabi
gcc/ChangeLog:
2019-04-09 Matthew Malcomson <matthew.malcomson@arm.com>
PR target/90024
* config/arm/arm.c (neon_valid_immediate): Disallow VOIDmode parameter.
* config/arm/constraints.md (Dm, DN, Dn): Split previous Dn constraint
into three.
* config/arm/neon.md (*neon_mov<mode>): Account for TImode and DImode
differences directly.
(*smax<mode>3_neon, vashl<mode>3, vashr<mode>3_imm): Use Dm constraint.
gcc/testsuite/ChangeLog:
2019-04-09 Matthew Malcomson <matthew.malcomson@arm.com>
PR target/90024
* gcc.dg/torture/neon-immediate-timode.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/neon-immediate-timode.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.c
trunk/gcc/config/arm/constraints.md
trunk/gcc/config/arm/neon.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:43:22 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 11:43:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
/* { dg-do run } */
/* { dg-require-weak "" } */
void __attribute__((noinline,noclone))
check (int i)
{
if (i == 0)
__builtin_exit (0);
}
int i;
extern int x __attribute__((weak));
int main(int argc, char **argv)
{
if (argc)
{
check (i);
return x;
}
else
{
check (i);
return x-1;
}
return 0;
}
FAILs at -O2 due to GIMPLE PRE and at -Os due to RTL hoist (if GIMPLE PRE
is fixed).
>From gcc-bugs-return-640128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:49:39 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 11:49:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #6)
> I bisected GCC 4.9.x branch and it started with r215059, which is a backport
> of 3 patches. I reverted changes in:
> patching file gcc/recog.c
> patching file gcc/tree-ssa-loop-niter.c
> patching file gcc/tree-vect-slp.c
>
> and so that it points to backport of PR61672.
Note that was a fix for the fallout of r208113 so before that rev. the issue
should "re-appear" in the past.
>From gcc-bugs-return-640129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:50:16 2019
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Subject: [Bug c++/90010] [8/9 Regression] valgrind error with snprintf and -Wall
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
>From gcc-bugs-return-640130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 11:56:00 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 09 Apr 2019 11:56:00 -0000
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--- Comment #45 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #44)
> (In reply to Iain Sandoe from comment #43)
> > Created attachment 46110 [details]
> > Proof-of-principle path
> >
> > Does this work for you?
> > - my local testing says it generates the right wrapped include file.
> >
> > (perhaps the constraint on darwin version was too tight in Erik's case)
>
> Sorry for my ignorance, but how do I apply this? Do I just patch, and then
> configure and compile/bootstrap as a normal svn checkout, or do I have to do
> anything special regarding the fixincludes? And if so, is there a link to
> some documentation?
the patch includes the generated files, so yes ...
patch -p1 < ......
and then configure and make
>From gcc-bugs-return-640131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:08:21 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #46 from Erik Schnetter <schnetter at gmail dot com> ---
The patch does not include the generated files. You need to run "genfixes" in
the "fixincludes" directory after applying the patch.
>From gcc-bugs-return-640132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:13:52 2019
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Tue, 09 Apr 2019 12:13:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
For the RTL issue there's
compute_hash_table_work (struct gcse_hash_table_d *table)
{
...
/* First pass over the instructions records information used to
determine when registers and memory are first and last set. */
FOR_BB_INSNS (current_bb, insn)
{
if (!NONDEBUG_INSN_P (insn))
continue;
if (CALL_P (insn))
{
hard_reg_set_iterator hrsi;
EXECUTE_IF_SET_IN_HARD_REG_SET (regs_invalidated_by_call,
0, regno, hrsi)
record_last_reg_set_info (insn, regno);
if (! RTL_CONST_OR_PURE_CALL_P (insn))
record_last_mem_set_info (insn);
which eventually initializes blocks_with_calls which prunes transp. But
the calls in question are marked PURE but also
RTL_LOOPING_CONST_OR_PURE_CALL_P.
So the obvious thing for the above is to still mark the block for
RTL_LOOPING_CONST_OR_PURE_CALL_P.
Testing overall patch.
>From gcc-bugs-return-640133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:28:14 2019
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Subject: [Bug target/90024] [7/8 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Tue, 09 Apr 2019 12:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |9.0
Target Milestone|--- |7.5
Summary|[7/8/9 Regression] ICE on |[7/8 Regression] ICE on
|AArch32 NEON mov with |AArch32 NEON mov with
|TImode constant. |TImode constant.
>From gcc-bugs-return-640134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:32:12 2019
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Subject: [Bug c++/90010] [8/9 Regression] valgrind error with snprintf and -Wall
Date: Tue, 09 Apr 2019 12:32:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46113
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46113&action=edit
gcc9-pr90010.patch
Untested fix.
>From gcc-bugs-return-640135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:39:48 2019
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Subject: [Bug c++/90010] [8/9 Regression] valgrind error with snprintf and -Wall
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-valid-code |diagnostic
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Not an ICE actually, just printing random bytes (1/2/3 at most) at the end of
the %qs string instead of the bytes that should be there.
>From gcc-bugs-return-640136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:42:30 2019
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Subject: [Bug tree-optimization/90018] [8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 12:42:00 -0000
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--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Liška from comment #6)
> I've just tested that on -march=skylake-avx512:
> model name : Intel(R) Xeon(R) Platinum 8164 CPU @ 2.00GHz
>
> r265451 works for me, but I had to increase a stack limit. With default
> limit 8192 I hit segfault here:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00000000008c890f in dyn_comp::dyn_run (ptop=219.4067000000008, ndt=1800,
> te0=0, dyn_state=..., dyn_in=..., dyn_out=..., rc=-1) at
> dyn_comp.fppized.f90:1142
> 1142 call t_startf ('dyn_run_alloc')
> (gdb) bt
> #0 0x00000000008c890f in dyn_comp::dyn_run (ptop=219.4067000000008,
> ndt=1800, te0=0, dyn_state=..., dyn_in=..., dyn_out=..., rc=-1) at
> dyn_comp.fppized.f90:1142
> #1 0x00000000009e18f9 in stepon::stepon_run1 (dtime_out=<optimized out>,
> phys_state=..., phys_tend=..., dyn_in=..., dyn_out=...) at
> stepon.fppized.f90:427
> #2 0x0000000000a27840 in cam_comp::cam_run1 (cam_in=..., cam_out=...) at
> cam_comp.fppized.f90:195
> #3 0x0000000000a50a04 in atm_comp_mct::atm_init_mct (eclock=...,
> cdata_a=..., x2a_a=..., a2x_a=..., nlfilename=<error reading variable: value
> requires 4200145 bytes, which is more than max-value-size>,
> _nlfilename=_nlfilename@entry=0) at atm_comp_mct.fppized.f90:349
> #4 0x0000000000ab0f02 in ccsm_comp_mod::ccsm_init () at
> ccsm_comp_mod.fppized.f90:1577
> #5 0x0000000000402bcd in ccsm_driver () at ccsm_driver.fppized.f90:57
> #6 main (argc=<optimized out>, argv=<optimized out>) at
> ccsm_driver.fppized.f90:25
> #7 0x00007ffff6e35ea7 in __libc_start_main () from /lib64/libc.so.6
>
> @H.J. Can you please check the stack limit?
Please use GCC 8 branch, not trunk. The problem only shows up on GCC 8 branch.
>From gcc-bugs-return-640137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:44:15 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #47 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Erik Schnetter from comment #46)
> The patch does not include the generated files. You need to run "genfixes"
> in the "fixincludes" directory after applying the patch.
the one I put above has the generated file (fixincl.x)
>From gcc-bugs-return-640138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:47:34 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 09 Apr 2019 12:47:00 -0000
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--- Comment #48 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps that redefinition of _Atomic should be guarded with
#if (__STDC_VERSION__ < 201112L) || defined(__cplusplus)
or so, so that for C -std=c11 you still get _Atomic?
>From gcc-bugs-return-640139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 12:58:42 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #49 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #48)
> Perhaps that redefinition of _Atomic should be guarded with
> #if (__STDC_VERSION__ < 201112L) || defined(__cplusplus)
> or so, so that for C -std=c11 you still get _Atomic?
sure, right now the idea is to prove that the fix works (since Erik's version
was said not to, I just stopped it does to the minimum).
I have questions open with folks in Apple and clang to see if this issue is an
intentional "enhancement" or an accidental bug (and I think our eventual fix
might depend on the answer to that) - my hope is that the SDK will get reissued
so that we don't need the fix include hack at all.
>From gcc-bugs-return-640140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 13:08:50 2019
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From: "gandalf at winds dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/89998] [7/8 regression] ICE: verify_gimple failed in printf-return-value
Date: Tue, 09 Apr 2019 13:08:00 -0000
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--- Comment #10 from gandalf at winds dot org ---
(In reply to Jakub Jelinek from comment #9)
> Fixed for trunk. As a workaround I'd suggest using a correct prototype or
> -fno-builtin-sprintf if you intentionally use a different one.
Thanks. Using the correct prototype (dropping the 'unsigned') indeed works as a
workaround.
>From gcc-bugs-return-640141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 13:19:52 2019
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Subject: [Bug translation/90011] [9 Regression] trailing space in diagnostic
Date: Tue, 09 Apr 2019 13:19:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 9 13:19:16 2019
New Revision: 270229
URL: https://gcc.gnu.org/viewcvs?rev=270229&root=gcc&view=rev
Log:
PR translation/90011
* typeck2.c (check_narrowing): Remove trailing space from diagnostics.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck2.c
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 13:20:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
>From gcc-bugs-return-640142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 13:20:32 2019
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 13:20:00 -0000
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> Please use GCC 8 branch, not trunk. The problem only shows up on GCC 8
> branch.
I can confirm that with r265453 I see:
*** Miscompare of cam4_validate.txt; for details see
/home/mliska/Programming/cpu2017/benchspec/CPU/527.cam4_r/run/run_peak_refrate_gcc7-m64.0000/cam4_validate.txt.mis
0001: PASS: 4 points.
Failure at Step: 2 1 1 1
^
'cam4_validate.txt' long
But it's not immediately, it takes couple of minutes to see it.
I'm reducing that.
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Subject: [Bug debug/90017] gcc generates wrong debug information at -O3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |aoliva at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, I think the debuginfo is "correct", at the last invocation of
optimize_me_not () l is indeed 8. At -O3 we "merely" unrolled the
inner loop completely. When you step through the program at
each optimize_me_not invoation the value of l is correct but gdb
seems to set only one breakpoint for 'b 15' which you can see doing
(gdb) b optimize_me_not
(gdb) b 15
(gdb) run
Breakpoint 1, optimize_me_not () at t.c:2
2 __asm__ volatile ("" : : : "memory");
(gdb) c
Continuing.
Breakpoint 1, optimize_me_not () at t.c:2
2 __asm__ volatile ("" : : : "memory");
(gdb) c
Continuing.
Breakpoint 1, optimize_me_not () at t.c:2
2 __asm__ volatile ("" : : : "memory");
(gdb) c
Continuing.
Breakpoint 1, optimize_me_not () at t.c:2
2 __asm__ volatile ("" : : : "memory");
(gdb) c
Continuing.
Breakpoint 2, main () at t.c:15
15 optimize_me_not();
looking at disassembly with source interleaved shows that this might get
wrong somewhere during debug-info creation, not sure exactly how we
compute the line number program. Maybe it's also a consumer issue.
>From gcc-bugs-return-640145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 13:28:27 2019
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Subject: [Bug translation/90011] [9 Regression] trailing space in diagnostic
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-640146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 13:35:12 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Tue, 09 Apr 2019 13:35:00 -0000
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--- Comment #34 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
@@ -30877,6 +30883,11 @@ arm_valid_target_attribute_rec (tree args, struct
gcc_options *opts)
else if (!strncmp (q, "arm", 3))
opts->x_target_flags &= ~MASK_THUMB;
+ else if (!strncmp (q, "general-regs-only", strlen
("general-regs-only")))
+ {
+ opts->x_target_flags |= MASK_GENERAL_REGS_ONLY;
+ }
+
else if (!strncmp (q, "fpu=", 4))
{
int fpu_index;
I'm really not sure I understand this strncmp (but also the ones for arm and
thumb), does that mean you want to accept also general-regs-only123 or
general-regs-onlycorgewaldo or thumb__ ? If you want to support e.g. only
optional whitespace after the string, each handled case should update the
pointer and then something after it should verify/diagnose.
Also, single stmt if bodies shouldn't be wrapped with {} and the arm case is
misindented.
Otherwise, I think the eh_personality.cc change is acceptable to me (but ask
Jonathan or other libstdc++ maintainers).
>From gcc-bugs-return-640147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 13:46:38 2019
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Subject: [Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ABI
CC| |andi-gcc at firstfloor dot org,
| |hjl.tools at gmail dot com,
| |hubicka at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Guess this is primarily an ABI issue, whether such arguments shouldn't be
passed at all even if they have the extra alignments or not.
On:
struct S { long a[0] __attribute__ ((aligned (32))); };
void bar (long double, struct S, long double);
void foo (void)
{
struct S b;
bar (8.0L, b, 9.0L);
}
clang doesn't agree with icc, clang passes 8.0L at rsp and 9.0 at rsp+16, while
icc at rsp and rsp+32 (and gcc ICEs).
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
However, '--size=test' helps here, fails quickly. With the revision, there 2
files are difference: mapz_module.fppized.o.s and optics_lib.o.s.
I suspect the later one.
>From gcc-bugs-return-640149-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 14:22:06 2019
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Subject: [Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looking at
struct S { long a[0] __attribute__ ((aligned (32))); };
long double u;
void baz (struct S *);
void bar (long double x, struct S y, long double z)
{
u = x + z;
baz (&y);
}
this doesn't ICE, but gcc emits loads from rsp+32 and rsp+64, while clang from
rbp+16 and rbp+32.
So, do we want to ignore the TYPE_EMPTY_P arguments even for argument alignment
computations (both at the caller and callee)?
Do we want some -Wpsabi warning for this?
>From gcc-bugs-return-640150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 14:36:39 2019
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Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Tue, 09 Apr 2019 14:36:00 -0000
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--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
We have a pseudo:SI<-hardreg:SI assignment followed by
pseudo:DF<-float(pseudo:SI) conversion, and we substitute the latter through
the former, creating a pseudo:DF<-float(hardreg:SI) insn that fails in recog.
I'm not exactly sure why RA would reject reloading the operand when it's a
hardreg, but happily reload when it's a pseudo. Am I missing something obvious,
or are such constraints written down somewhere?
>From gcc-bugs-return-640151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 14:39:06 2019
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Tue, 09 Apr 2019 14:39:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looking at the rev. and the context I figured the original caller was
added for a case that can no longer happen (SAME_DR_STMT set, that
can never happen since we rewrote interleaving chain detection for GCC 4.9).
>From gcc-bugs-return-640152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 15:07:07 2019
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Subject: [Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
Date: Tue, 09 Apr 2019 15:07:00 -0000
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #3)
> Looking at
> struct S { long a[0] __attribute__ ((aligned (32))); };
> long double u;
> void baz (struct S *);
> void bar (long double x, struct S y, long double z)
> {
> u = x + z;
> baz (&y);
> }
> this doesn't ICE, but gcc emits loads from rsp+32 and rsp+64, while clang
> from rbp+16 and rbp+32.
> So, do we want to ignore the TYPE_EMPTY_P arguments even for argument
> alignment computations (both at the caller and callee)?
We should ask it in x86-64 psABI group.
> Do we want some -Wpsabi warning for this?
I think so.
>From gcc-bugs-return-640153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 15:09:39 2019
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Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=64867
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
There's also a warning about passing POD thru varargs under
-Wconditionally-supported, and bug 64867 would split it off into a separate
-Wnon-pod-varargs flag
>From gcc-bugs-return-640154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 15:12:36 2019
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Subject: [Bug c++/64867] split warning for passing non-POD to varargs function from -Wconditionally-supported into new warning flag, -Wnon-pod-varargs
Date: Tue, 09 Apr 2019 15:12:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |87403
Summary|warning for passing non-POD |split warning for passing
|to varargs function |non-POD to varargs function
| |from
| |-Wconditionally-supported
| |into new warning flag,
| |-Wnon-pod-varargs
--- Comment #25 from Eric Gallager <egallager at gcc dot gnu.org> ---
retitling
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] [Meta-bug] Issues that suggest a new warning
>From gcc-bugs-return-640156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 15:15:50 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
Date: Tue, 09 Apr 2019 15:15:00 -0000
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--- Comment #43 from Jeffrey A. Law <law at redhat dot com> ---
The problem with your suggestions Segher is that we'd have to do them for every
target which defines insns with a zero_extract destination and that's been the
well understood way to handle this stuff for over 2 decades.
Improving combine avoids that problem. Of course we have to balance the
pros/cons of any patch in that space as well which is hard to do without an
official patch to evaluate. What I've got is just proof of concept for the
most common case, but it does show some promise.
Also note that Steve's patch just addresses combine_bfi IIUC. My POC addresses
insv_?.c as well as the existing combine_bfi test (but I haven't tested it
against the deeper tests in Steve's patch.
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Subject: [Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #4)
> > So, do we want to ignore the TYPE_EMPTY_P arguments even for argument
> > alignment computations (both at the caller and callee)?
>
> We should ask it in x86-64 psABI group.
Can you please do that?
Thanks.
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Subject: [Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
Date: Tue, 09 Apr 2019 15:18:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
That'd be much appreciated, I was puzzled as to what we should do when I first
took a look at this.
>From gcc-bugs-return-640158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 15:19:09 2019
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Subject: [Bug middle-end/89972] [8/9 Regression] ICE in expand_call, at calls.c:4229
Date: Tue, 09 Apr 2019 15:19:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I suppose we need to find out the answer first -> WAITING.
>From gcc-bugs-return-640159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 15:32:00 2019
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Subject: [Bug target/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
Date: Tue, 09 Apr 2019 15:31:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
According to my bisection, this is not reproduceable on the trunk starting with
r266862.
>From gcc-bugs-return-640160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 16:03:01 2019
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Subject: [Bug target/89794] combine incorrectly forwards register value through auto-inc operation
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
Summary|wrong code with -Og |combine incorrectly
|-fno-forward-propagate |forwards register value
| |through auto-inc operation
--- Comment #5 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This appears to be combine missing a PRE_MODIFY operation.
After expand we have:
(insn 10 7 11 2 (set (reg:DI 127)
(zero_extend:DI (mem/c:HI (plus:SI (reg/f:SI 103 afp)
(const_int 8 [0x8])) [1 i+0 S2 A32]))) "/tmp/test3.c":10:7
160 {zero_extendhidi2}
(nil))
...
(insn 24 23 25 2 (set (reg:SI 133)
(plus:SI (reg/f:SI 103 afp)
(const_int 8 [0x8]))) "/tmp/test3.c":12:3 4 {*arm_addsi3}
(nil))
...
(insn 33 32 34 2 (set (mem/c:HI (reg:SI 133) [0 MEM[(void *)&i]+0 S2 A16])
(reg:HI 141)) "/tmp/test3.c":12:3 189 {*movhi_insn_arch4}
(nil))
The auto-inc-dec pass transforms this into:
(insn 50 7 10 2 (set (reg/f:SI 133)
(reg/f:SI 103 afp)) "/tmp/test3.c":10:7 -1
(nil))
(insn 10 50 12 2 (set (reg:DI 127 [ i ])
(zero_extend:DI (mem/c:HI (pre_modify:SI (reg/f:SI 133)
(plus:SI (reg/f:SI 133)
(const_int 8 [0x8]))) [1 i+0 S2 A32])))
"/tmp/test3.c":10:7 160 {zero_extendhidi2}
(expr_list:REG_INC (reg/f:SI 133)
(nil)))
...
(insn 33 49 34 2 (set (mem/c:HI (reg/f:SI 133) [0 MEM[(void *)&i]+0 S2 A16])
(subreg:HI (reg:SI 140) 0)) "/tmp/test3.c":12:3 189 {*movhi_insn_arch4}
(expr_list:REG_DEAD (reg:SI 140)
(expr_list:REG_DEAD (reg/f:SI 133)
(nil))))
And combine, missing the pre_modify, then substitutes insn 50 directly into
insn 33
Trying 50 -> 33:
50: r133:SI=afp:SI
33: [r133:SI]=r140:SI#0
REG_DEAD r140:SI
REG_DEAD r133:SI
Successfully matched this instruction:
(set (mem/c:HI (reg/f:SI 103 afp) [0 MEM[(void *)&i]+0 S2 A16])
(subreg:HI (reg:SI 140) 0))
Which is clearly wrong as it has now lost the pre-modify operation.
>From gcc-bugs-return-640161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 16:14:05 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/90012] untranslateable placeholder in expressionsem.c
Date: Tue, 09 Apr 2019 16:14:00 -0000
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
Thank you for changing this so quickly. Will your change make it into the next
translation round before the 9.1 release? That would be good because it would
save be quite some work.
>From gcc-bugs-return-640162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 16:27:29 2019
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Subject: [Bug c++/85400] invalid Local Dynamic TLS relaxation for symbol defined in method
Date: Tue, 09 Apr 2019 16:27:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Note that the pr85400.C test passes even if I revert the patch (on x86_64).
Does the test really test the issue, or does it just not manifest on x86_64?
>From gcc-bugs-return-640163-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 16:41:50 2019
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Subject: [Bug rtl-optimization/90026] New: [8/9 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)
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Bug ID: 90026
Summary: [8/9 Regression] ICE: verify_flow_info failed (error:
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g++-9.0.0-alpha20190407 snapshot (r270192) ICEs when compiling
gcc/testsuite/g++.dg/torture/pr33340.C w/ -O2 (-O3, -Ofast)
-fnon-call-exceptions -ftracer:
% g++-9.0.0-alpha20190407 -O2 -fnon-call-exceptions -ftracer -w -c
gcc/testsuite/g++.dg/torture/pr33340.C
gcc/testsuite/g++.dg/torture/pr33340.C: In function 'void f()':
gcc/testsuite/g++.dg/torture/pr33340.C:29:1: error: missing barrier after block
2
29 | }
| ^
during RTL pass: outof_cfglayout
gcc/testsuite/g++.dg/torture/pr33340.C:29:1: internal compiler error:
verify_flow_info failed
0xb37297 verify_flow_info()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/cfghooks.c:265
0xb509d5 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/cfgrtl.c:3622
>From gcc-bugs-return-640164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 16:45:41 2019
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/90012] untranslateable placeholder in expressionsem.c
Date: Tue, 09 Apr 2019 16:45:00 -0000
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--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Roland Illig from comment #2)
> Thank you for changing this so quickly. Will your change make it into the
> next translation round before the 9.1 release? That would be good because it
> would save be quite some work.
Running i.e: 'msgmerge -U fr.po gcc.pot` will remove all dmd texts from fr.po,
however I don't know who maintains this, or how updates get submitted to/from
the translation project.
>From gcc-bugs-return-640165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 16:48:28 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 09 Apr 2019 16:48:00 -0000
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--- Comment #50 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Jakub Jelinek from comment #48)
> Perhaps that redefinition of _Atomic should be guarded with
> #if (__STDC_VERSION__ < 201112L) || defined(__cplusplus)
> or so, so that for C -std=c11 you still get _Atomic?
So shall I wait for this to test the fix?
>From gcc-bugs-return-640166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 17:16:10 2019
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Subject: [Bug target/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
Date: Tue, 09 Apr 2019 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89965
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, we have:
(insn 41 40 42 6 (parallel [
(set (reg/v:DI 101 [ i ])
(lshiftrt:DI (reg/v:DI 118 [ i ])
(const_int 7 [0x7])))
(clobber (reg:CC 17 flags))
]) "pr89965.c":9 574 {*lshrdi3_doubleword}
(expr_list:REG_DEAD (reg/v:DI 118 [ i ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_EQUIV (mem:DI (reg/f:SI 7 sp) [0 S8 A32])
(nil)))))
(insn 42 41 43 6 (set (reg:QI 89 [ _3 ])
(subreg:QI (reg/v:DI 101 [ i ]) 0)) "pr89965.c":10 88 {*movqi_internal}
(nil))
(insn 43 42 44 6 (parallel [
(set (reg/v:QI 102 [ c ])
(mult:QI (reg:QI 89 [ _3 ])
(subreg:QI (reg:SI 111 [ c ]) 0)))
(clobber (reg:CC 17 flags))
]) "pr89965.c":10 351 {*mulqi3_1}
(expr_list:REG_DEAD (reg:SI 111 [ c ])
(expr_list:REG_DEAD (reg:QI 89 [ _3 ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))))
(insn 44 43 45 6 (set (mem:DI (plus:SI (reg/f:SI 7 sp)
(const_int 8 [0x8])) [0 S8 A32])
(const_int 12 [0xc])) "pr89965.c":11 85 {*movdi_internal}
(nil))
(insn 45 44 46 6 (set (mem:DI (reg/f:SI 7 sp) [0 S8 A32])
(reg/v:DI 101 [ i ])) "pr89965.c":11 85 {*movdi_internal}
(expr_list:REG_DEAD (reg/v:DI 101 [ i ])
(nil)))
(call_insn/u 46 45 49 6 (set (reg:DI 0 ax)
(call (mem:QI (symbol_ref:SI ("__udivdi3") [flags 0x41]) [0 S1 A8])
(const_int 16 [0x10]))) "pr89965.c":11 699 {*call_value}
(expr_list:REG_UNUSED (reg:DI 0 ax)
(expr_list:REG_EH_REGION (const_int -2147483648 [0xffffffff80000000])
(nil)))
(expr_list (use (mem:DI (reg/f:SI 7 sp) [0 S8 A8]))
(expr_list (use (mem:DI (plus:SI (reg/f:SI 7 sp)
(const_int 8 [0x8])) [0 S8 A8]))
(nil))))
before RA (and the __udivdi3 call is actually dead - ax after it is not used.
Note the result of i >> 7 is first used in the multiplication and later stored
into the argument slot of the call.
Now, RA decides for some reason to first push the i >> 7 into the stack slot
and then load the single byte from it for the purpose of the multiplication:
(insn 41 116 118 6 (parallel [
(set (reg/v:DI 0 ax [orig:101 i ] [101])
(lshiftrt:DI (reg/v:DI 0 ax [orig:101 i ] [101])
(const_int 7 [0x7])))
(clobber (reg:CC 17 flags))
]) "pr89965.c":9 574 {*lshrdi3_doubleword}
(expr_list:REG_EQUIV (mem:DI (reg/f:SI 7 sp) [0 S8 A32])
(nil)))
(insn 118 41 42 6 (set (mem:DI (reg/f:SI 7 sp) [0 S8 A32])
(reg/v:DI 0 ax [orig:101 i ] [101])) "pr89965.c":9 85 {*movdi_internal}
(nil))
(insn 42 118 119 6 (set (reg:QI 6 bp [orig:89 _3 ] [89])
(mem:QI (reg/f:SI 7 sp) [0 S1 A32])) "pr89965.c":10 88
{*movqi_internal}
(nil))
...
Finally, rtl_dce pass has code to DCE not just dead const/pure calls, but also
their arguments, but unfortunately that code (find_call_stack_args) doesn't
seem to take into account that some code might read again from those arguments
(rather than only the call reading from those stack slots).
So I guess the question is, is what the RA did above ok? If yes, I think
find_call_stack_args needs to be changed to FOR_EACH_SUBRTX NONCONST walk the
SET_SRC (set) and if it finds a MEM that is argument slot, either punt
immediately, or remove those bits from sp_bytes, so that corresponding store
won't be set in arg_stores and we'll punt on that store.
>From gcc-bugs-return-640167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 17:21:07 2019
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Subject: [Bug target/89794] combine incorrectly forwards register value through auto-inc operation
Date: Tue, 09 Apr 2019 17:21:00 -0000
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--- Comment #6 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
There seems to be more to this than initially thought. Another insn is in
play.
(insn 12 10 14 2 (set (reg:SI 129)
(bswap:SI (subreg:SI (reg:DI 127 [ i ]) 4))) "/tmp/test3.c":10:7 331
{*arm_rev}
(expr_list:REG_DEAD (reg:DI 127 [ i ])
(nil)))
Which uses the value loaded by the pre-modify instruction.
Combine manages to combine (and simplify insns 10 and 12, but the
simplification is to
(set (reg:SI 129) (const_int 0))
and we've lost the pre-inc entirely.
>From gcc-bugs-return-640168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 17:38:53 2019
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Subject: [Bug c/90027] New: misalign variable access by piece load/store even when define STRICT_ALIGNMENT nonzero
Date: Tue, 09 Apr 2019 17:38:00 -0000
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Bug ID: 90027
Summary: misalign variable access by piece load/store even when
define STRICT_ALIGNMENT nonzero
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base gcc 7.3.0, in function expand_expr_real_1 we can see the follow code:
else if (SLOW_UNALIGNED_ACCESS (mode, align))
temp = extract_bit_field (temp, GET_MODE_BITSIZE (mode),
0, TYPE_UNSIGNED (TREE_TYPE (exp)),
(modifier == EXPAND_STACK_PARM
? NULL_RTX : target),
mode, mode, false);
it means even when we define STRICT_ALIGNMENT 1, it may still extract the store
insns with narrow alignment.
In Gcc internal, it say that SLOW_UNALIGNED_ACCESS should produce a nonzero
value when STRICT_ALIGNMENT is nonzero.
A test cases:
int foo ()
{
volatile int *pswData = 2; /* point to address 2 is not aligned with 4
bytes. */
return *pswData - *pswData;
}
>From gcc-bugs-return-640169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 17:44:08 2019
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Subject: [Bug tree-optimization/86504] vectorization failure for a nest loop
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Hi Richard,
Do you still plan on working on this? Otherwise I'd like to take it over for
GCC10.
>From gcc-bugs-return-640171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 18:12:13 2019
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Subject: [Bug tree-optimization/86530] Vectorization failure for a simple loop
Date: Tue, 09 Apr 2019 18:12:00 -0000
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--- Comment #3 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
I'll take this one as part of GCC10.
>From gcc-bugs-return-640172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 18:13:07 2019
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Subject: [Bug tree-optimization/88259] vectorization failure for a typical loop for getting max value and index
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--- Comment #5 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
I'll be taking a look at this one as a part of GCC 10 as well.
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Subject: [Bug tree-optimization/88492] SLP optimization generates ugly code
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--- Comment #3 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
I'll be taking a look at this one as a part of GCC 10 as well.
>From gcc-bugs-return-640174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 18:14:12 2019
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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--- Comment #10 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Hi Richard,
Do you still plan on working on this? Otherwise I'd like to add it to my list
of things to do for GCC 10.
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Subject: [Bug tree-optimization/88915] Try smaller vectorisation factors in scalar fallback
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--- Comment #3 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
I'll be taking a look at this one as a part of GCC 10 as well.
>From gcc-bugs-return-640176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 18:25:59 2019
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Subject: [Bug c/90028] New: On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90028
Bug ID: 90028
Summary: On Intel Skylake (-march=native) generated avx512
instruction can be wrong
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
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Created attachment 46114
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46114&action=edit
19.05-rc1 default gcc build on skylake
gcc version:
gcc (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2)
binutils:
GNU ld version 2.31.1-24.fc29
This is observed in dpdk project (https://git.dpdk.org/dpdk/tree/?h=v19.05-rc1)
on Intel Skylate CPU.
Full build command (removed -I & -D ones):
gcc -Wp,-MD,./.rte_kni.o.d.tmp -m64 -pthread -march=native -W -Wall
-Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations
-Wold-style-definition -Wpointer-arith -Wcast-align -Wnested-externs
-Wcast-qual -Wformat-nonliteral -Wformat-security -Wundef -Wwrite-strings
-Wdeprecated -Werror -Wimplicit-fallthrough=2 -Wno-format-truncation -O3
-fno-strict-aliasing -o rte_kni.o -c
/root/development/dpdk-next-net/lib/librte_kni/rte_kni.c
When related code build with "-mno-avx512f" flag, problem solved. Also clang
(clang version 7.0.1 (Fedora 7.0.1-6.fc29)) output works fine.
Suspected from 'vpgatherqq' instruction usage.
The related .c code is
(https://git.dpdk.org/dpdk/tree/lib/librte_kni/rte_kni.c?h=v19.05-rc1#n546):
"
static void *
va2pa(struct rte_mbuf *m)
{
return (void *)((unsigned long)m -
((unsigned long)m->buf_addr -
(unsigned long)m->buf_iova));
}
unsigned
rte_kni_tx_burst(struct rte_kni *kni, struct rte_mbuf **mbufs, unsigned num)
{
void *phy_mbufs[num];
unsigned int ret;
unsigned int i;
for (i = 0; i < num; i++)
phy_mbufs[i] = va2pa(mbufs[i]);
....
"
'm->buf_addr' & 'm->buf_iova' are next to each other in the struct, so there is
8 bytes difference between their address.
Generated asm code:
avx512 enabled code snippet:
232c: ba ff ff ff ff mov $0xffffffff,%edx
2331: 48 c1 e0 05 shl $0x5,%rax
2335: 31 c9 xor %ecx,%ecx
2337: c5 f9 92 ca kmovb %edx,%k1
233b: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
2340: 62 f1 fe 28 6f 0c 0e vmovdqu64 (%rsi,%rcx,1),%ymm1
2347: c5 f9 90 d1 kmovb %k1,%k2
*234b: 62 f2 fd 2a 91 04 0d vpgatherqq 0x1(,%ymm1,1),%ymm0{%k2}
2352: 01 00 00 00
2356: c5 f9 90 d9 kmovb %k1,%k3
235a: c5 fd d4 c1 vpaddq %ymm1,%ymm0,%ymm0
235e: 62 f2 fd 2b 91 14 0d vpgatherqq 0x0(,%ymm1,1),%ymm2{%k3}
2365: 00 00 00 00
2369: c5 fd fb c2 vpsubq %ymm2,%ymm0,%ymm0
236d: 62 d1 fe 28 7f 04 08 vmovdqu64 %ymm0,(%r8,%rcx,1)
same code avx512 disabled (avx2) code snippet:
2332: c5 ed 76 d2 vpcmpeqd %ymm2,%ymm2,%ymm2
2336: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
233d: 00 00 00
2340: c5 fe 6f 0c 0e vmovdqu (%rsi,%rcx,1),%ymm1
2345: c5 fd 6f e2 vmovdqa %ymm2,%ymm4
2349: c4 e2 dd 91 04 0d 08 vpgatherqq %ymm4,0x8(,%ymm1,1),%ymm0
2350: 00 00 00
2353: c5 fd 6f ea vmovdqa %ymm2,%ymm5
2357: c4 e2 d5 91 1c 0d 00 vpgatherqq %ymm5,0x0(,%ymm1,1),%ymm3
235e: 00 00 00
2361: c5 fd d4 c1 vpaddq %ymm1,%ymm0,%ymm0
2365: c5 fd fb c3 vpsubq %ymm3,%ymm0,%ymm0
2369: c4 c1 7e 7f 04 08 vmovdqu %ymm0,(%r8,%rcx,1)
full asm outputs are attached.
In the avx512 one, for 'vpgatherqq', it looks like the offset should be 0x8
instead of 0x1.
>From gcc-bugs-return-640177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 18:27:11 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Tue, 09 Apr 2019 18:27:00 -0000
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--- Comment #1 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
Created attachment 46115
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19.05-rc1 -mno-avx512f gcc build on skylake
The build is done with changing the lib/librte_kni/Makefile as following:
+ CFLAGS += -mno-avx512f
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Tue, 09 Apr 2019 18:34:00 -0000
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--- Comment #2 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
While preparing the support files for this report, via --save-temps, recognized
that generated .s file output is a little different, and correct assuming the
suspicion on source of the failure was right:
3495 movl $-1, %edx
3496 salq $5, %rax
3497 xorl %ecx, %ecx
3498 kmovb %edx, %k1
3499 .p2align 4,,10
3500 .p2align 3
3501 .L540:
3502 vmovdqu64 (%rsi,%rcx), %ymm1
3503 kmovb %k1, %k2
3504 vpgatherqq 8(,%ymm1,1), %ymm0{%k2}
3505 kmovb %k1, %k3
3506 vpaddq %ymm1, %ymm0, %ymm0
3507 vpgatherqq 0(,%ymm1,1), %ymm2{%k3}
3508 vpsubq %ymm2, %ymm0, %ymm0
3509 vmovdqu64 %ymm0, (%r8,%rcx)
It has "vpgatherqq 8 ..."
Attaching .s and .i files.
Does this mean the problem is in the assembler?
/usr/bin/as --version
GNU assembler version 2.31.1-24.fc29
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Subject: [Bug c++/90029] New: optimizing local exceptions, or are they an observable side effect
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90029
Bug ID: 90029
Summary: optimizing local exceptions, or are they an observable
side effect
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: federico.kircheis at gmail dot com
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Hello,
this is partly a question, and partly a feature request
Consider following functions
----
int bar_ex_noexcept(int i) noexcept {
struct foo{};
try {
if(i<0){
throw foo{};
}
return i;
}catch(foo){
return -1;
}
}
int bar_ex(int i) {
struct foo{};
try {
if(i<0){
throw foo{};
}
return i;
}catch(foo){
return -1;
}
}
int bar_ret(int i) noexcept {
if(i<0){
return -1;
}
return i;
}
int bar_goto(int i) noexcept {
if(i<0){
goto ex;
}
return i;
ex: return -1;
}
----
All this functions, unless I overlooked something, do exactly the same with
different control structure (goto, exception, early return): return the given
value i positive or 0, -1 if less than 0.
gcc is smart, and all functions, except those that use as implementation detail
an exception, generate the same assembly with (testing with `-O3`).
`bar_ex_noexcept` also has a call to `std::terminate`, even if it will never
get executed (example here: https://godbolt.org/z/XVtgXG).
Since `foo` is defined locally to `bar_ex`/`bar_ex_noexcept`, I expected that
gcc would have been able to optimize the throw and catch clause completely
(calls to `__cxa_allocate_exception` and `__cxa_throw`), but it's not the case.
Also the conditional call to `std::terminate` in `bar_ex_noexcept` surprised
me, since the only thrown exception is always caught and ignored.
Therefore my question: are exceptions an observable behavior, and thus the
compiler can't optimize them completely away, or is simply gcc "not smart
enough" to do those optimization.
If they are not observable, the feature request would be to
* optimize local exceptions
* thus remove typeinfo information for types that can never escape the local
scope (since if the exceptions are optimized, those information are not used by
anyone)
* remove dead calls to `std::terminate`
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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>From gcc-bugs-return-640182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 18:49:03 2019
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90030] New: Fortran OpenACC subarray data alignment
Date: Tue, 09 Apr 2019 18:49:00 -0000
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Bug ID: 90030
Summary: Fortran OpenACC subarray data alignment
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
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As reported by Cesar in
<https://gcc.gnu.org/ml/gcc-patches/2015-09/msg01664.html>, and later
re-submitted in <https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01911.html>.
> In both OpenACC and OpenMP, each subarray has at least two data mappings
> associated with them, one for the pointer and another for the data in
> the array section (fortan also has a pset mapping). One problem I
> observed in fortran is that array section data is casted to char *.
> Consequently, when lower_omp_target assigns alignment for the subarray
> data, it does so incorrectly. This is a problem on nvptx if you have a
> data clause such as
>
> integer foo
> real*8 bar (100)
>
> !$acc data copy (foo, bar(1:100))
>
> Here, the data associated with bar could get aligned on a 4 byte
> boundary instead of 8 byte. That causes problems on nvptx targets.
>
> My fix for this is to prevent the fortran front end from casting the
> data pointers to char *. I only prevented casting on the code which
> handles OMP_CLAUSE_MAP. The subarrays associated with OMP_CLAUSE_SHARED
> also get casted to char *, but I left those as-is because I'm not that
> familiar with how non-OpenMP target regions get lowered.
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Subject: [Bug libstdc++/90008] [9 Regression] variant attempts to copy rhs in comparison operators
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Apr 9 18:50:39 2019
New Revision: 270236
URL: https://gcc.gnu.org/viewcvs?rev=270236&root=gcc&view=rev
Log:
PR libstdc++/90008 remove unused capture from variant rel ops
PR libstdc++/90008
* include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE): Remove
unused capture.
* testsuite/20_util/variant/90008.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/20_util/variant/90008.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/variant
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Tue, 09 Apr 2019 18:59:00 -0000
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--- Comment #5 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
Tested with latest gcc [1], same output.
[1] Compiled from source:
gcc (GCC) 9.0.1 20190409 (experimental)
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Subject: [Bug c++/53294] Optimize out some exception code
Date: Tue, 09 Apr 2019 19:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |federico.kircheis at gmail dot com
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 90029 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-640185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 19:04:15 2019
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Subject: [Bug c++/90029] optimizing local exceptions, or are they an observable side effect
Date: Tue, 09 Apr 2019 19:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=64501
Resolution|--- |DUPLICATE
Severity|normal |enhancement
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Exceptions whose effects aren't observable could be optimized away. I think
this is also what pr53294 requests. See also pr64501.
*** This bug has been marked as a duplicate of bug 53294 ***
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #51 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #50)
> (In reply to Jakub Jelinek from comment #48)
> > Perhaps that redefinition of _Atomic should be guarded with
> > #if (__STDC_VERSION__ < 201112L) || defined(__cplusplus)
> > or so, so that for C -std=c11 you still get _Atomic?
>
> So shall I wait for this to test the fix?
no, please check that we have a basic fix, we can polish it once we know more
about the situation and the possible way forward.
>From gcc-bugs-return-640188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 19:31:25 2019
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Subject: [Bug libstdc++/90008] [9 Regression] variant attempts to copy rhs in comparison operators
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for GCC 9.1
>From gcc-bugs-return-640189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 19:31:50 2019
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/88150] Use sections_elf_shared.d on Solaris
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--- Comment #12 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
I've now reworked my non-dlpi_tls_modid patch to include this after
Solaris 11.[345]/x86 testing gave excellent and pretty much identical
test results:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00354.html
>From gcc-bugs-return-640190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 19:33:18 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Tue, 09 Apr 2019 19:33:00 -0000
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--- Comment #35 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #33)
> (In reply to Ramana Radhakrishnan from comment #32)
> >
> > Either I drop the warning or I keep the hunk in eh_personality.cc - any
> > preferences / thoughts ?
>
> It would feel safer, if only the functions that need it
> had a target attribute like:
>
> _Unwind_Reason_Code
> #ifdef __ARM_EABI_UNWINDER__
> __attribute__((target("general-regs-only")))
> PERSONALITY_FUNCTION (_Unwind_State state,
> struct _Unwind_Exception* ue_header,
> struct _Unwind_Context* context)
Agreed - will this work instead?
>From gcc-bugs-return-640191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 19:43:50 2019
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Subject: [Bug libstdc++/89851] [9 Regression] std::variant comparison operators violate [variant.relops]
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Priority|P1 |P3
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-09
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Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The regression was introduced with r269422 and fixed with r270056.
I'll add the testcase to the testsuite and close this.
>From gcc-bugs-return-640192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 19:51:32 2019
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From: "redbeard0531 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90031] New: Bogus parse error trying to explicitly specialize a template variable inside class scope
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Bug ID: 90031
Summary: Bogus parse error trying to explicitly specialize a
template variable inside class scope
Product: gcc
Version: 9.0
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https://godbolt.org/z/y5GQZd
struct Struct {
template <typename T, typename = void>
constexpr static bool use_cond = false;
template <typename T>
constexpr static bool use_cond<T, void> = true;
};
<source>:5:27: error: explicit template argument list not allowed
5 | constexpr static bool use_cond<T, void> = true;
| ^~~~~~~~~~~~~~~~~
>From gcc-bugs-return-640193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 19:52:44 2019
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Subject: [Bug libstdc++/89851] [9 Regression] std::variant comparison operators violate [variant.relops]
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Done
>From gcc-bugs-return-640194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 20:07:14 2019
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Subject: [Bug c/90027] misalign variable access by piece load/store even when define STRICT_ALIGNMENT nonzero
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> A test cases:
> int foo ()
> {
> volatile int *pswData = 2; /* point to address 2 is not aligned with 4
> bytes. */
> return *pswData - *pswData;
> }
That precisely makes it undefined behavior, see 6.5.3.2:
"The unary * operator denotes indirection. If the operand points to a function,
the result is a function designator; if it points to an object, the result is
an lvalue designating the object. If the operand has type ‘‘pointer to type’’,
the result has type ‘‘type’’. If an invalid value has been assigned to the
pointer, the behavior of the unary * operator is undefined(102)."
"(102) Among the invalid values for dereferencing a pointer by the unary *
operator are a null pointer, an address inappropriately aligned for the type of
object pointed to, and the address of an object after the end of its lifetime."
>From gcc-bugs-return-640195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 20:25:12 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
Date: Tue, 09 Apr 2019 20:25:00 -0000
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--- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks for the patch, I'll test it fully tomorrow.
I'll open a separate bug for the FreeBSD issue. We could use more fine-grained
configure checks so that most C99 math functions are enabled, even if some of
the complex ones are missing.
>From gcc-bugs-return-640196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 09 20:58:10 2019
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Subject: [Bug rtl-optimization/90032] New: [MSP430] reload uses wrong stack slot for variable after setjmp/longjmp
Date: Tue, 09 Apr 2019 20:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90032
Bug ID: 90032
Summary: [MSP430] reload uses wrong stack slot for variable
after setjmp/longjmp
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
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Created attachment 46118
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46118&action=edit
tester.i
gcc.dg/torture/stackalign/setjmp-1.c fails at execution for msp430-elf at -O1.
An RTL optimization added in r255136 exposed the failure, but if I make this
optimization in the source of the test, then versions of GCC before this also
fail, back to GCC 7. It passes with gcc-6.4, but again that is just because the
RTL at reload is different.
I've attached a reduced testcase (tester.i) based on setjmp-1.c.
> msp430-elf-gcc -O1 -msim tester.i
The failure occurs because the wrong stack slot is used as the first argument
to strcmp.
R1 is the stack pointer, R12 stores the first argument to functions.
> MOV.W R12, 20(R1) ; The address of the string is stored in 20(R1)
> MOV.W #25972, @R12 ; "te"
> MOV.W #29811, 2(R12) ; "st"
> .... (No other modifications of R1)
> .... preparing jmp_buf
> CALL #sub2
> .... Label for return from longjmp
> MOV.W @R1, R12 ; The address of the string is actually in 20(R1)
> CALL #strcmp
Whether the test fails or not seems gated on if frame_pointer_needed == true
for main(). When there is "more" RTL code (i.e. before the revisions that added
the problematic optimizations), then frame_pointer_needed == true so the
address of the "test" string will be used as an offset from the frame pointer,
instead of the stack pointer.
TARGET_FRAME_POINTER_REQUIRED () always returns false for msp430, but if I make
it return true if
(cfun->has_nonlocal_label || cfun->calls_setjmp)
then the test passes and the following code is generated.
The frame pointer is R4, but it is not fixed.
> MOV.W R12, -2(R4)
> MOV.W #25972, @R12
> MOV.W #29811, 2(R12)
> .... (No other modifications of R4)
> CALL #sub2
> .... Label for return from longjmp
> MOV.W -2(R4), R12 ; -2(R4) contains the correct address of "test"
I've attached the assembly file, IRA and reload dumps for tester.i when
compiled with current trunk.
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Subject: [Bug rtl-optimization/90032] [MSP430] reload uses wrong stack slot for variable after setjmp/longjmp
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Jozef Lawrynowicz <jozefl.gcc at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46118|0 |1
is obsolete| |
--- Comment #1 from Jozef Lawrynowicz <jozefl.gcc at gmail dot com> ---
Created attachment 46119
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tester.i
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Subject: [Bug rtl-optimization/90032] [MSP430] reload uses wrong stack slot for variable after setjmp/longjmp
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tester.i reload dump
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Subject: [Bug rtl-optimization/90032] [MSP430] reload uses wrong stack slot for variable after setjmp/longjmp
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Created attachment 46120
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Subject: [Bug rtl-optimization/90032] [MSP430] reload uses wrong stack slot for variable after setjmp/longjmp
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tester.s
>From gcc-bugs-return-640201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 00:34:53 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #44 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #43)
> The problem with your suggestions Segher is that we'd have to do them for
> every target which defines insns with a zero_extract destination and that's
> been the well understood way to handle this stuff for over 2 decades.
It has only worked in some cases and not in others, for all of those decades.
And what cases those are exactly changes with the phase of the moon, well, with
any otherwise irrelevant change.
This is part of the reason why rs6000 doesn't have insv patterns any more,
btw (since r226005). (The other part is that our rl*imi insns can only in
very limited cases be described with insv).
> Improving combine avoids that problem.
Sure, but combine just gives up for RMW insns in many cases (and it has to).
Some other passes do the same thing, I would think? Using the same pseudo
for two things causes problems.
> Of course we have to balance the
> pros/cons of any patch in that space as well which is hard to do without an
> official patch to evaluate. What I've got is just proof of concept for the
> most common case, but it does show some promise.
Oh, I'm not against any such patch /per se/, if it is safe and suitable for
stage 4, and an improvement (not a regression for some targets), I'll okay
it of course.
> Also note that Steve's patch just addresses combine_bfi IIUC. My POC
> addresses insv_?.c as well as the existing combine_bfi test (but I haven't
> tested it against the deeper tests in Steve's patch.
>From gcc-bugs-return-640202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 01:16:45 2019
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Subject: [Bug c++/90033] New: [concepts] ICE segfault evaluating a requires clause that transitively depends on itself
Date: Wed, 10 Apr 2019 01:16:00 -0000
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Bug ID: 90033
Summary: [concepts] ICE segfault evaluating a requires clause
that transitively depends on itself
Product: gcc
Version: 9.0
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https://godbolt.org/z/SEfFol
This is a creduce'd example that tripped a segfault in our Real World Code
implementation of unique_function. The RWC version includes a requirement that
X != Y so this can never be a copy or move constructor, but that was removed in
the reduction. FWIW, The clang concepts fork compiles this successfully.
template <bool B>
struct bool_constant { static constexpr bool value = B; };
template <typename T, typename... Args>
struct is_constructible : bool_constant<__is_constructible(T, Args...)> {};
template <typename T>
T&& move(T&);
struct X {
template <typename OtherFunc>
requires(is_constructible<OtherFunc, OtherFunc>::value)
X(OtherFunc &&);
X() = default;
};
X source;
X dest = move(source);
---------
<source>: In substitution of 'template<class OtherFunc> requires
is_constructible<OtherFunc, OtherFunc>::value X::X(OtherFunc&&) [with OtherFunc
= X]':
<source>:16:21: required from here
<source>:16:21: internal compiler error: Segmentation fault
16 | X dest = move(source);
| ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
I know concepts are still experimental, but if the fix turns out to be simple,
we'd appreciate a backport to gcc8.
>From gcc-bugs-return-640203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 01:34:29 2019
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Subject: [Bug libstdc++/89991] Complex numbers: Calculation of imaginary part is not correct
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--- Comment #25 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Tue, Apr 09, 2019 at 08:24:29PM +0000, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89991
>
> --- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> Thanks for the patch, I'll test it fully tomorrow.
>
I think the patch for complex_sqrt() is correct. The one
for complex_pow(), I think accidently works for OP, but is
likely broken for some general regions of the complex plane.
> I'll open a separate bug for the FreeBSD issue. We could use more fine-grained
> configure checks so that most C99 math functions are enabled, even if some of
> the complex ones are missing.
libgfortran has c99_functions.c that implements missing C99 math
functions when configure cannot find one. The implementations
are likely to be fairly direct without much optimization,
worrying about exceptional casea, or even tested extensively.
>From gcc-bugs-return-640204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 01:58:04 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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fink at snaggledworks dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fink at snaggledworks dot com
--- Comment #52 from fink at snaggledworks dot com ---
(In reply to Iain Sandoe from comment #43)
> Created attachment 46110 [details]
> Proof-of-principle path
>
> Does this work for you?
> - my local testing says it generates the right wrapped include file.
>
> (perhaps the constraint on darwin version was too tight in Erik's case)
I applied this patch to the 8.3.0 source as built using the Fink gcc8 package
(with minor tweaks so it would apply cleanly), and gcc-8.3.0 now built fine on
macOS 10.14.4 with Xcode10.2.
>From gcc-bugs-return-640205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 03:06:41 2019
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Subject: [Bug c/90027] misalign variable access by piece load/store even when define STRICT_ALIGNMENT nonzero
Date: Wed, 10 Apr 2019 03:06:00 -0000
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--- Comment #2 from vfdff <zhongyunde at huawei dot com> ---
for deja testcase: gcc.c-torture/execute/20010518-2.c
as the struct a_struct define with __attribute__ ((packed)), so the member
variable b also not aligned with 4 bytes, is this case undefined behavior ?
typedef struct
{
short a;
long b; /* Will not aligned with 4 bytes */
short c;
short d;
} __attribute__ ((packed)) a_struct;
int
main(void)
{
volatile a_struct *a;
volatile a_struct b;
a = &b;
*a = (a_struct){1,2,3,4};
if (a->a != 1 || a->b != 2 || a->c != 3 || a->d != 4)
abort ();
exit (0);
}
>From gcc-bugs-return-640206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 04:07:49 2019
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Subject: [Bug c/448] <stdint.h>-related issues (C99 issues)
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|netbsd, SymbianOS, LynxOS, |SymbianOS, LynxOS, QNX, TPF
|QNX, TPF |
--- Comment #45 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to coypu from comment #44)
> (In reply to joseph@codesourcery.com from comment #31)
> > GCC: some NetBSD targets (netbsd-stdint.h only used for x86 / x86_64),
>
> Speaking for NetBSD only:
> as of https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=253323 , we
> include netbsd-stdint.h for all netbsd targets.
OK, removing it from the target list then.
>From gcc-bugs-return-640207-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 04:54:08 2019
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From: "todd.freed at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90034] New: gcc hangs on wait4 after vfork after opening tmp file
Date: Wed, 10 Apr 2019 04:54:00 -0000
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Bug ID: 90034
Summary: gcc hangs on wait4 after vfork after opening tmp file
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: todd.freed at gmail dot com
Target Milestone: ---
Created attachment 46123
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46123&action=edit
causes the hang
Here is the command:
> dd if=bug_input.c bs=1 count=3051 2>/dev/null | gcc -xc - # hangs
The hang seems to be specific to this input somehow.
If I pass any count < 3051, it does not hang. For any count >= 3051, it hangs.
If I pass an offset of any kind, it does not hang.
If I take those 3050 bytes and put them in a file instead of passing then to
stdin via pipe, it still hangs.
> gcc -bug_input_0_3050.c # hangs
I've attached the entire file anyway, for context. The file was generated by
GNU bison.
-----------------------------------
strace snippet from the hang
. . .
getpid() = 16236
openat(AT_FDCWD, "/tmp/ccPYKe6J.s", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
close(3) = 0
stat("/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/cc1", {st_mode=S_IFREG|0755,
st_size=26001000, ...}) = 0
access("/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/cc1", X_OK) = 0
vfork() = 16237
wait4(16237,
-----------------------------------
strace snippet from a non-hang
. . .
getpid() = 16578
openat(AT_FDCWD, "/tmp/ccBrWed1.s", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
close(3) = 0
stat("/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/cc1", {st_mode=S_IFREG|0755,
st_size=26001000, ...}) = 0
access("/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/cc1", X_OK) = 0
vfork() = 16579
wait4(16579, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 16579
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=16579, si_uid=1000,
si_status=0, si_utime=0, si_stime=0} ---
getpid() = 16578
openat(AT_FDCWD, "/tmp/ccXHF56n.o", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
close(3) = 0
. . .
-----------------------------------
Version Info:
todd@euclid ~/bison
0 master % uname -a
Linux euclid 5.0.4-arch1-1-ARCH #1 SMP PREEMPT Sat Mar 23 21:00:33 UTC 2019
x86_64 GNU/Linux
todd@euclid ~/bison
0 master % pacman -Q gcc
gcc 8.2.1+20181127-1
todd@euclid ~/bison
0 master % gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
--enable-cet=auto
Thread model: posix
gcc version 8.2.1 20181127 (GCC)
NOTE : This also repro's on another of my dev machines, with gcc version 8.2.1
20180831 (GCC)
>From gcc-bugs-return-640208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 04:58:04 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90034] gcc hangs on wait4 after vfork after opening tmp file
Date: Wed, 10 Apr 2019 04:58:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
wait4 is waiting for child process to finish. You need to do strace with -f
option to follow the forks.
>From gcc-bugs-return-640209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 05:39:43 2019
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From: "federico.kircheis at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90029] optimizing local exceptions, or are they an observable side effect
Date: Wed, 10 Apr 2019 05:39:00 -0000
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--- Comment #2 from Federico Kircheis <federico.kircheis at gmail dot com> ---
Thank you for your answer, I need to learn better how to search for related
bugs.
The bugs you linked do surely answer my question, but they do not cover exactly
the same requests.
1) optimize dead call to `std::terminate`.
2) remove typeinfo information for types that can never escape the local scope
The other tickets are more generic, in the general case it will not be possible
to remove the typeinfo by just looking at a function.
In my example `foo` is defined, thrown and captured inside `bar_ex*`, which is
not the common case when using exception (normally the error class is defined
globally or in a namespace)
Should I maybe open a feature request with those two missed optimization?
They are related to optimizing exceptions, but not completely dependent (I
think at least).
>From gcc-bugs-return-640210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 06:23:09 2019
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From: "JunMa at linux dot alibaba.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/89922] Loop on fixed size array is not unrolled and poorly optimized at -O2
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JunMa <JunMa at linux dot alibaba.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |JunMa at linux dot alibaba.com
--- Comment #5 from JunMa <JunMa at linux dot alibaba.com> ---
the testcase in https://godbolt.org/z/iKi0pb is well optimized in gcc6.5 with
O3, but not gcc7 and later.
I have checked the gimple code dumped by optimized pass which are same.
The difference is done by rtl_cse1 pass.
>From gcc-bugs-return-640211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 06:56:58 2019
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 46124
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46124&action=edit
Vectorizer and optimized dumps
So I can confirm the problematic file is mapz_module.fppized.f90. The
problematic vectorization happens with:
-Ofast -march=native -funroll-loops -fdbg-cnt=vect_loop:10
this is OK:
-Ofast -march=native -funroll-loops -fdbg-cnt=vect_loop:9
I'm attaching dump files, however the vectorized loop is quite huge. Hard to
see something suspicious.
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Theoretically similar to PR87214, but the patch was backported and this issues
is present in 8.3.1.
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #53 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Erik Schnetter from comment #46)
> The patch does not include the generated files. You need to run "genfixes"
> in the "fixincludes" directory after applying the patch.
This I don't understand: ./genfixes did nothing, just producing the message
# ./genfixes
AutoGen-ing fixincl.x
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Subject: [Bug c/90027] misalign variable access by piece load/store even when define STRICT_ALIGNMENT nonzero
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> for deja testcase: gcc.c-torture/execute/20010518-2.c
> as the struct a_struct define with __attribute__ ((packed)), so the member
> variable b also not aligned with 4 bytes, is this case undefined behavior ?
No, and AFAIK the testcase has always worked on strict-alignment platforms.
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Can be reproduced also on e.g. a Haswell machine:
-Ofast -march=haswell -g -funroll-loops
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Subject: [Bug c/90027] misalign variable access by piece load/store even when define STRICT_ALIGNMENT nonzero
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> No, and AFAIK the testcase has always worked on strict-alignment platforms.
To be more explicit:
typedef struct
{
short a;
long b;
short c;
short d;
} __attribute__ ((packed)) S;
S s;
S *p = &s;
long *b = &s.b;
p->b is OK because it's (*p).b and p contains a valid address for its type, but
*b is not OK because b doesn't contain a valid address for its type.
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Subject: [Bug c++/90010] [8/9 Regression] valgrind error with snprintf and -Wall
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 10 07:27:20 2019
New Revision: 270246
URL: https://gcc.gnu.org/viewcvs?rev=270246&root=gcc&view=rev
Log:
PR c++/90010
* gimple-ssa-sprintf.c (target_to_host): Fix handling of targstr
with strlen in between hostsz-3 and hostsz-1 inclusive when no
translation is needed, and when translation is needed, only append
... if the string length is hostsz or more bytes long. Avoid using
strncpy or strcat.
* gcc.dg/pr90010.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr90010.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-ssa-sprintf.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/90025] [9 Regression] botan2 miscompilation on s390x-linux since r268957
Date: Wed, 10 Apr 2019 07:28:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 10 07:28:05 2019
New Revision: 270247
URL: https://gcc.gnu.org/viewcvs?rev=270247&root=gcc&view=rev
Log:
PR middle-end/90025
* expr.c (store_expr): Set properly size on the MEM passed to
clear_storage.
* gcc.c-torture/execute/pr90025.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr90025.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/90026] [8/9 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code,
| |wrong-code
Priority|P3 |P2
Target Milestone|--- |8.4
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90006] [7/8 Regression] gcc loops indefinitely around vect_get_constant_vectors on -O2 -ftree-slp-vectorize -fno-math-errno
Date: Wed, 10 Apr 2019 07:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 Regression] gcc |[7/8 Regression] gcc loops
|loops indefinitely around |indefinitely around
|vect_get_constant_vectors |vect_get_constant_vectors
|on -O2 -ftree-slp-vectorize |on -O2 -ftree-slp-vectorize
|-fno-math-errno |-fno-math-errno
Known to fail|9.0 |
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
See also Richards followup r270222 when backporting.
>From gcc-bugs-return-640221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 07:33:38 2019
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Subject: [Bug c++/90010] [8 Regression] valgrind error with snprintf and -Wall
Date: Wed, 10 Apr 2019 07:33:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] valgrind |[8 Regression] valgrind
|error with snprintf and |error with snprintf and
|-Wall |-Wall
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-640222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 07:33:48 2019
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Subject: [Bug middle-end/90025] [9 Regression] botan2 miscompilation on s390x-linux since r268957
Date: Wed, 10 Apr 2019 07:33:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-640223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 07:35:59 2019
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Subject: [Bug target/89794] combine incorrectly forwards register value through auto-inc operation
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I have a patch.
>From gcc-bugs-return-640224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 07:41:09 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Wed, 10 Apr 2019 07:41:00 -0000
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--- Comment #54 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Ok, after running genfixes there are still only two modified files in the whole
tree of code, namely fixincludes/inclhack.def and fixincludes/fixincl.x.
Is that as intended?
>From gcc-bugs-return-640225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 07:41:17 2019
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Subject: [Bug rtl-optimization/90026] [8/9 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)
Date: Wed, 10 Apr 2019 07:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-10
CC| |marxin at gcc dot gnu.org
Known to work| |7.4.0
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |8.3.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with mine r254437.
>From gcc-bugs-return-640226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 07:42:14 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/90034] gcc hangs on wait4 after vfork after opening tmp file
Date: Wed, 10 Apr 2019 07:42:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-10
CC| |dmalcolm at gcc dot gnu.org
Component|c |preprocessor
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I see the odd
> tail /tmp/x
28769 stat("/usr/include/stdc-predef.h.gch", 0x7ffee0a9f9c0) = -1 ENOENT (No
such file or directory)
28769 open("/usr/include/stdc-predef.h", O_RDONLY|O_NOCTTY) = 3
28769 fstat(3, {st_mode=S_IFREG|0644, st_size=2495, ...}) = 0
28769 read(3, "/* Copyright (C) 1991-2015 Free "..., 2495) = 2495
28769 close(3) = 0
28769 mmap(NULL, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7f53c4cf9000
28769 open("/dev/stdout", O_RDONLY) = 3
28769 fstat(3, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 16), ...}) = 0
28769 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7f53c4cf8000
28769 read(3,
so it reads from stdout!?
Ah, that's because of the input containing
#line 72 "/dev/stdout" /* yacc.c:315 */
if I "fix" that we get
stdout:84:9: error: no macro name given in #ifndef directive
stdout:84: error: unterminated #ifndef
so GCC wants to complain about
# ifndef YY_NULLPTR
and tries to apply caret diagnostics to that. Opening /dev/stdout succeeds
but reading from it will hang.
Smaller testcase that will hang:
#line 1 "/dev/stdout"
#def xy
we should probably check whether the file we opened is a regular file
before trying to read from it.
That said, bison should be fixed to not emit this kind of line directives...
>From gcc-bugs-return-640227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 07:54:48 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #55 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #54)
> Ok, after running genfixes there are still only two modified files in the
> whole tree of code, namely fixincludes/inclhack.def and
> fixincludes/fixincl.x.
> Is that as intended?
yes, that's correct - for Erik's patch you would need to run ./genfixes, for
my patch I already ran that for you.
I would expect both patches to work - but we need to decide on the exact guards
(e.g. as Jakub suggested) depending on the result of discussions about the
clang bug.
>From gcc-bugs-return-640228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:03:06 2019
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Subject: [Bug tree-optimization/86504] vectorization failure for a nest loop
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Tamar Christina from comment #5)
> Hi Richard,
>
> Do you still plan on working on this? Otherwise I'd like to take it over for
> GCC10.
I've already committed the patch mentioned in #c4 (can't remember
which patch it was offhand) but it turned out not to fix this PR
after all. So please go ahead.
>From gcc-bugs-return-640229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:07:57 2019
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Subject: [Bug c++/90005] No error produced for the wrong type of string used in gcc >= 5.0
Date: Wed, 10 Apr 2019 08:07:00 -0000
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--- Comment #9 from Pawel <pawel.wrobel at nielsen dot com> ---
Hello Eric,
Thank You so much for this answer - in our case that turned out also to be
really useful.
We took the "-Werror=conditionally-supported" version - to trigger an error in
our custom variadic function - as we really do not want the non-POD(std::string
in our case) argument there - and we prefer having the error visible, when
someone accidentally use std::string instead of char* in the large codebase.
Thanks !
>From gcc-bugs-return-640230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:08:33 2019
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Subject: [Bug tree-optimization/88259] vectorization failure for a typical loop for getting max value and index
Date: Wed, 10 Apr 2019 08:08:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 9 Apr 2019, tnfchris at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88259
>
> Tamar Christina <tnfchris at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|NEW |ASSIGNED
> CC| |tnfchris at gcc dot gnu.org
> Assignee|unassigned at gcc dot gnu.org |tnfchris at gcc dot gnu.org
>
> --- Comment #5 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> I'll be taking a look at this one as a part of GCC 10 as well.
Note that ripping out non-SLP support from the vectorizer will turn
reduction support upside down ... which means the work will heavily
conflict, either me or you needing to re-do stuff.
>From gcc-bugs-return-640231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:11:34 2019
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
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--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 9 Apr 2019, tnfchris at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65930
>
> Tamar Christina <tnfchris at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
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>
> --- Comment #10 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> Hi Richard,
>
> Do you still plan on working on this? Otherwise I'd like to add it to my list
> of things to do for GCC 10.
I failed to come up with a "nice" way to handle this - everything I
did inside the vectorizer turned out to be a hack (and I don't like
hacks). If you have some clever ideas make sure to outline a patch
before finalizing it so you won't be disappointed by negative feedback ;)
>From gcc-bugs-return-640232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:30:00 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Wed, 10 Apr 2019 08:30:00 -0000
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--- Comment #6 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Ferruh YIGIT from comment #1)
> Created attachment 46115 [details]
> 19.05-rc1 -mno-avx512f gcc build on skylake
>
> The build is done with changing the lib/librte_kni/Makefile as following:
>
> + CFLAGS += -mno-avx512f
(In reply to Ferruh YIGIT from comment #5)
> Tested with latest gcc [1], same output.
>
> [1] Compiled from source:
> gcc (GCC) 9.0.1 20190409 (experimental)
I built rte_kni.i with latest gcc and got
...
vmovdqu64 (%rsi,%rax), %zmm1
kmovw %k1, %k2
vpgatherqq 8(,%zmm1,1), %zmm0{%k2}
vpaddq %zmm1, %zmm0, %zmm0
kmovw %k1, %k3
vpgatherqq 0(,%zmm1,1), %zmm2{%k3}
vpsubq %zmm2, %zmm0, %zmm0
vmovdqu64 %zmm0, (%rcx,%rax)
...
Can't reproduce the issue you mentioned.
Could you please upload *.s and *.o with both version(with and without
-mno-avx512f).
>From gcc-bugs-return-640233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:31:32 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Wed, 10 Apr 2019 08:31:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looks like gas bug to me:
vpgatherqq 8(,%ymm1,1), %ymm0{%k2}
vpgatherqq 8(%rcx,%ymm1,1), %ymm0{%k2}
vpgatherqq %ymm2, 8(,%ymm1,1), %ymm0
vpgatherqq %ymm2, 8(%rcx,%ymm1,1), %ymm0
when assembled with gas and objdump -d:
0: 62 f2 fd 2a 91 04 0d vpgatherqq 0x1(,%ymm1,1),%ymm0{%k2}
7: 01 00 00 00
b: 62 f2 fd 2a 91 44 09 vpgatherqq 0x8(%rcx,%ymm1,1),%ymm0{%k2}
12: 01
13: c4 e2 ed 91 04 0d 08 vpgatherqq %ymm2,0x8(,%ymm1,1),%ymm0
1a: 00 00 00
1d: c4 e2 ed 91 44 09 08 vpgatherqq %ymm2,0x8(%rcx,%ymm1,1),%ymm0
while when assembled with clang and objdump -d:
0: 62 f2 fd 2a 91 04 0d vpgatherqq 0x8(,%ymm1,1),%ymm0{%k2}
7: 08 00 00 00
b: 62 f2 fd 2a 91 44 09 vpgatherqq 0x8(%rcx,%ymm1,1),%ymm0{%k2}
12: 01
13: c4 e2 ed 91 04 0d 08 vpgatherqq %ymm2,0x8(,%ymm1,1),%ymm0
1a: 00 00 00
1d: c4 e2 ed 91 44 09 08 vpgatherqq %ymm2,0x8(%rcx,%ymm1,1),%ymm0
But trying current binutils trunk assembles it correctly too:
0: 62 f2 fd 2a 91 04 0d vpgatherqq 0x8(,%ymm1,1),%ymm0{%k2}
7: 08 00 00 00
b: 62 f2 fd 2a 91 44 09 vpgatherqq 0x8(%rcx,%ymm1,1),%ymm0{%k2}
12: 01
13: c4 e2 ed 91 04 0d 08 vpgatherqq %ymm2,0x8(,%ymm1,1),%ymm0
1a: 00 00 00
1d: c4 e2 ed 91 44 09 08 vpgatherqq %ymm2,0x8(%rcx,%ymm1,1),%ymm0
That said, strangely even current binutils trunk doesn't have any test coverage
for the EVEX encoded v*gather* instructions with no base register (i.e.
disp(,%[xyz]mm*,*) ) while it has coverage for such AVX2 gathers.
>From gcc-bugs-return-640234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:32:48 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fedora binutils-2.31.1-24.fc29.x86_64 has the bug, haven't checked upstream
2.31.1 nor which exact patch fixed it. But as I said, there is no testcase
coverage for this, so it might break any time again.
>From gcc-bugs-return-640235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:38:26 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #56 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I tried the fix, but now I get another error:
/libstdc++-v3/../libgcc
-I/usr/local/packages/gcc_9.0_fixincl/_build/x86_64-apple-darwin18.5.0/i386/libstdc++-v3/include/x86_64-apple-darwin18.5.0
-I/usr/local/packages/gcc_9.0_fixincl/_build/x86_64-apple-darwin18.5.0/i386/libstdc++-v3/include
-I/usr/local/packages/gcc_9.0_fixincl/libstdc++-v3/libsupc++ -std=gnu++17
-D_GLIBCXX_SHARED -fno-implicit-templates -Wall -Wextra -Wwrite-strings
-Wcast-qual -Wabi=2 -fdiagnostics-show-location=once -ffunction-sections
-fdata-sections -frandom-seed=fs_dir.lo -fimplicit-templates -g -O2 -m32 -c
../../../../../../libstdc++-v3/src/c++17/fs_dir.cc -fno-common -DPIC
-D_GLIBCXX_SHARED -o fs_dir.o
../../../../../../libstdc++-v3/src/c++17/fs_ops.cc:31:10: fatal error:
filesystem: No such file or directory
31 | #include <filesystem>
| ^~~~~~~~~~~~
compilation terminated.
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #9 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
Created attachment 46125
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46125&action=edit
19.05-rc1 default gcc build (avx512 enabled) on skylake .o file
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #10 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
Created attachment 46126
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46126&action=edit
19.05-rc1 default gcc build (avx512 enabled) on skylake .s file via
--save-temps
>From gcc-bugs-return-640238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 08:50:35 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #11 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
Created attachment 46127
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19.05-rc1 -mno-avx512f gcc build on skylake .o file
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #12 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
Created attachment 46128
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19.05-rc1 -mno-avx512f gcc build on skylake .s file via --save-temp
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #13 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
(In reply to Hongtao.liu from comment #6)
> (In reply to Ferruh YIGIT from comment #1)
> > Created attachment 46115 [details]
> > 19.05-rc1 -mno-avx512f gcc build on skylake
> >
> > The build is done with changing the lib/librte_kni/Makefile as following:
> >
> > + CFLAGS += -mno-avx512f
>
> (In reply to Ferruh YIGIT from comment #5)
> > Tested with latest gcc [1], same output.
> >
> > [1] Compiled from source:
> > gcc (GCC) 9.0.1 20190409 (experimental)
>
> I built rte_kni.i with latest gcc and got
>
> ...
> vmovdqu64 (%rsi,%rax), %zmm1
> kmovw %k1, %k2
> vpgatherqq 8(,%zmm1,1), %zmm0{%k2}
> vpaddq %zmm1, %zmm0, %zmm0
> kmovw %k1, %k3
> vpgatherqq 0(,%zmm1,1), %zmm2{%k3}
> vpsubq %zmm2, %zmm0, %zmm0
> vmovdqu64 %zmm0, (%rcx,%rax)
> ...
>
> Can't reproduce the issue you mentioned.
>
> Could you please upload *.s and *.o with both version(with and without
> -mno-avx512f).
Attached:
gcc_avx512_rte_kni.o
gcc_avx512_rte_kni.s
gcc_NO_avx512_rte_kni.o
gcc_NO_avx512_rte_kni.s
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Wed, 10 Apr 2019 08:54:00 -0000
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--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
$ as --version
GNU assembler (GNU Binutils; openSUSE Tumbleweed) 2.32
is fine:
$ as --64 avx512.s -o avx512.o && objdump -S avx512.o | grep gather
234b: 62 f2 fd 2a 91 04 0d vpgatherqq 0x8(,%ymm1,1),%ymm0{%k2}
235e: 62 f2 fd 2b 91 14 0d vpgatherqq 0x0(,%ymm1,1),%ymm2{%k3}
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #36 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #35)
> (In reply to Bernd Edlinger from comment #33)
> > (In reply to Ramana Radhakrishnan from comment #32)
> > >
> > > Either I drop the warning or I keep the hunk in eh_personality.cc - any
> > > preferences / thoughts ?
> >
> > It would feel safer, if only the functions that need it
> > had a target attribute like:
> >
> > _Unwind_Reason_Code
> > #ifdef __ARM_EABI_UNWINDER__
> > __attribute__((target("general-regs-only")))
> > PERSONALITY_FUNCTION (_Unwind_State state,
> > struct _Unwind_Exception* ue_header,
> > struct _Unwind_Context* context)
>
> Agreed - will this work instead?
Aren't there many functions that are inlined into it (then it would be fine)
but could not be inlined (and then it would be a problem, at least in theory)?
Though, if there are inlines that are used in other TUs and those TUs are not
general-regs-only and we decide not to inline, then it might be pure luck if
COMDAT is won bu eh-personality.o versions or some other ones.
>From gcc-bugs-return-640243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 09:12:24 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Wed, 10 Apr 2019 09:12:00 -0000
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--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed in bintuils with:
commit 629cfaf1b0fbb32a985607c774bd8e7870b9fa94 (HEAD, refs/bisect/bad)
Author: Jan Beulich <jbeulich@novell.com>
Date: Mon Jul 30 17:25:05 2018 +0200
x86: don't mistakenly scale non-8-bit displacements
In commit b5014f7af2 I've removed (instead of replaced) a conditional,
resulting in addressing forms not allowing 8-bit displacements to now
get their displacements scaled under certain circumstances. Re-add the
missing conditional.
Minimal reproducer:
$ cat min.s
.text
foo:
vpgatherqq 8(,%ymm1,1), %ymm0{%k2}
$ ./gas/as-new --64 min.s -o avx512.o && ./binutils/objdump -S avx512.o
avx512.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <foo>:
0: 62 f2 fd 2a 91 04 0d vpgatherqq 0x1(,%ymm1,1),%ymm0{%k2}
7: 01 00 00 00
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Subject: [Bug tree-optimization/86504] vectorization failure for a nest loop
Date: Wed, 10 Apr 2019 09:16:00 -0000
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-640244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 09:16:40 2019
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Subject: [Bug tree-optimization/86504] vectorization failure for a nest loop
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Tamar Christina <tnfchris at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Cheers, Thanks Richard, I'll grab this one too then.
>From gcc-bugs-return-640246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 09:19:42 2019
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Subject: [Bug tree-optimization/88259] vectorization failure for a typical loop for getting max value and index
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--- Comment #7 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> Note that ripping out non-SLP support from the vectorizer will turn
> reduction support upside down ... which means the work will heavily
> conflict, either me or you needing to re-do stuff.
Fair enough, thanks for the heads up!
>From gcc-bugs-return-640247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 09:20:49 2019
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Subject: [Bug tree-optimization/65930] Reduction with sign-change not handled
Date: Wed, 10 Apr 2019 09:20:00 -0000
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--- Comment #12 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
> If you have some clever ideas make sure to outline a patch
> before finalizing it so you won't be disappointed by negative feedback ;)
I'll be sure to do that with this and the other changes I intend to tackle! :)
>From gcc-bugs-return-640248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 09:21:55 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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See Also| |https://sourceware.org/bugz
| |illa/show_bug.cgi?id=24434
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--- Comment #16 from Martin Liška <marxin at gcc dot gnu.org> ---
Moved.
>From gcc-bugs-return-640249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 09:43:43 2019
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the important difference when comparing patched/unpatched is the unpatched
compiler rejected vectorization with
mapz_module.fppized.f90:730:0: note: dependence distance == 0 between
*a4_627(D)[_196] and *a4_627(D)[_196]
mapz_module.fppized.f90:730:0: note: READ_WRITE dependence in interleaving.
mapz_module.fppized.f90:730:0: note: bad data dependence.
while the patched compiler is happy. That points to the patched function
and it's call here:
static bool
vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr,
loop_vec_info loop_vinfo,
unsigned int *max_vf)
{
...
if (dist == 0)
{
...
if (!vect_preserves_scalar_order_p (DR_STMT (dra), DR_STMT (drb)))
{
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"READ_WRITE dependence in interleaving.\n");
return true;
it's probably failure to factor in unrolling that breaks this case.
The unvectorized loop body looks like (all but relevant loads/stores elided):
<bb 20> [local count: 118111594]:
# i_313 = PHI <_1(19), i_293(24)>
_146 = *a4_255(D)[_145];
_152 = *a4_255(D)[_151];
_165 = *a4_255(D)[_164];
*a4_255(D)[_194] = _195;
*a4_255(D)[_201] = _202;
_203 = *a4_255(D)[_145];
_290 = *a4_255(D)[_151];
_291 = *a4_255(D)[_194];
*a4_255(D)[_194] = M.42_316;
i_293 = i_313 + 1;
if (_2 < i_293)
final runtime alias checks are:
create runtime check for data references *a4_255(D)[_151] and *a4_255(D)[_201]
create runtime check for data references *a4_255(D)[_194] and *a4_255(D)[_164]
create runtime check for data references *a4_255(D)[_194] and *a4_255(D)[_145]
create runtime check for data references *a4_255(D)[_164] and *a4_255(D)[_201]
and groups are
note: Detected interleaving load *a4_255(D)[_151] and *a4_255(D)[_194]
note: Detected interleaving load of size 4 starting with _152 =
*a4_255(D)[_151];
note: There is a gap of 2 elements after the group
note: Detected single element interleaving *a4_255(D)[_151] step 32
note: not consecutive access *a4_255(D)[_194] = _195;
note: using strided accesses
note: not consecutive access *a4_255(D)[_194] = M.42_316;
note: using strided accesses
note: Detected single element interleaving *a4_255(D)[_164] step 32
note: Detected single element interleaving *a4_255(D)[_145] step 32
note: Detected single element interleaving *a4_255(D)[_145] step 32
note: not consecutive access *a4_255(D)[_201] = _202;
note: using strided accesses
so there's no SLP involved.
The respective loop doesn't involve a reduction so -ffast-math shouldn't be
required here, only -ffinite-math-only for min/max recognition.
A C testcase mimicing the memory accesses and failing is
void __attribute__((noinline,noclone))
foo (double *a4, int n)
{
for (int i = 0; i < n; ++i)
{
double tem1 = a4[i*4] + a4[i*4+n];
double tem2 = a4[i*4+2*n+1];
a4[i*4+n+1] = tem1;
a4[i*4+1] = tem2;
double tem3 = a4[i*4] - a4[i*4+1];
double tem4 = tem3 + a4[i*4+n];
a4[i*4+n+1] = tem3 + a4[i*4+n+1];
}
}
int main()
{
const int n = 5;
double a4[4 * n * 8];
double a42[4 * n * 8];
for (int i = 0; i < 4 * n * 8; ++i)
a4[i] = a42[i] = i;
foo (a4, n);
for (int i = 0; i < n; ++i)
{
double tem1 = a42[i*4] + a4[i*4+n];
double tem2 = a42[i*4+2*n+1];
a42[i*4+n+1] = tem1;
a42[i*4+1] = tem2;
double tem3 = a42[i*4] - a42[i*4+1];
double tem4 = tem3 + a42[i*4+n];
a42[i*4+n+1] = tem3 + a42[i*4+n+1];
__asm__ volatile ("": : : "memory");
}
for (int i = 0; i < 4 * n * 8; ++i)
if (a4[i] != a42[i])
__builtin_abort ();
return 0;
}
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Subject: [Bug target/90016] aarch64: reference to undeclared N in help for command line option
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--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Wed Apr 10 09:51:16 2019
New Revision: 270248
URL: https://gcc.gnu.org/viewcvs?rev=270248&root=gcc&view=rev
Log:
[aarch64] PR90016 - aarch64: reference to undeclared N in help for command line
option
'to N' is now redundant and misleading given the earlier change to use
<number>.
Removed.
PR target/90016
* config/aarch64/aarch64.opt (msve-vector-bits): Remove redundant and
obsolete reference to N.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.opt
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Fixed
>From gcc-bugs-return-640252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 10:16:04 2019
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 10 Apr 2019 10:16:00 -0000
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--- Comment #37 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
If a non-general-regs-only function is called from here,
it will only preserve d8-d15, and the call-clobbered registers
d0-d7 would of course be modified.
But is that a problem at all, if the call-clobbered registers are not restored?
>From gcc-bugs-return-640253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 10:39:00 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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Nick Clifton <nickc at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #17 from Nick Clifton <nickc at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #8)
> Fedora binutils-2.31.1-24.fc29.x86_64 has the bug, haven't checked upstream
> 2.31.1 nor which exact patch fixed it.
FYI - binutils-2.31.1-25.fc29.x86_64 now contains the patch.
Cheers
Nick
>From gcc-bugs-return-640254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 10:44:17 2019
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Subject: [Bug libstdc++/89851] [9 Regression] std::variant comparison operators violate [variant.relops]
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 10 10:43:39 2019
New Revision: 270249
URL: https://gcc.gnu.org/viewcvs?rev=270249&root=gcc&view=rev
Log:
PR libstdc++/89851 Add testcase for std::variant equality
Add a test for the regression introduced with r269422 and fixed with
r270056.
PR libstdc++/89851
* testsuite/20_util/variant/89851.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/20_util/variant/89851.cc
Modified:
trunk/libstdc++-v3/ChangeLog
>From gcc-bugs-return-640255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 11:03:13 2019
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Subject: [Bug rtl-optimization/90026] [8/9 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
CC| |hubicka at gcc dot gnu.org
Assignee|marxin at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
So it's a bit older:
$ cat pr90026.cc
void *operator new(__SIZE_TYPE__, void *) {__builtin_unreachable (); }
struct e {
int *b;
~e() { delete b; }
};
void bar();
void foo() {
e a;
if (a.b)
a.b = new int();
bar();
new (0) void *;
}
$ g++ -c -fnon-call-exceptions -ftracer -O2 -fchecking pr90026.cc
pr90026.cc: In function ‘void foo()’:
pr90026.cc:13:1: error: missing barrier after block 2
13 | }
| ^
during RTL pass: outof_cfglayout
pr90026.cc:13:1: internal compiler error: verify_flow_info failed
0xb0309b verify_flow_info()
/home/marxin/Programming/gcc/gcc/cfghooks.c:265
0xb1c961 execute
/home/marxin/Programming/gcc/gcc/cfgrtl.c:3622
Started with r249070, but it's probably just a tracer influencing commit.
I'm unassigning.
>From gcc-bugs-return-640256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 11:05:35 2019
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #18 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
(In reply to Nick Clifton from comment #17)
> (In reply to Jakub Jelinek from comment #8)
> > Fedora binutils-2.31.1-24.fc29.x86_64 has the bug, haven't checked upstream
> > 2.31.1 nor which exact patch fixed it.
>
> FYI - binutils-2.31.1-25.fc29.x86_64 now contains the patch.
>
> Cheers
> Nick
Thanks Nick.
Can it be possible to get range of affected versions, so that we can provide
protection for them?
btw, are all binutils-2.31 affected, or fedora packge only?
Thanks,
ferruh
>From gcc-bugs-return-640257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 11:12:38 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Wed, 10 Apr 2019 11:12:00 -0000
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Upstream 2.31 and 2.31.1 is affected too, but 2.31 branch starting with August
2018 is not affected. As the fix has been backported also to 2.30 branch, I
guess 2.30 is affected too, 2.32 is not affected. Dunno about older binutils,
you'll need to try.
>From gcc-bugs-return-640258-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 11:12:43 2019
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Subject: [Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Wed, 10 Apr 2019 11:12:00 -0000
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the issue is really that for
for (int i = 0; i < n; ++i)
{
double tem1 = a4[i*4] + a4[i*4+n*4] (**);
double tem2 = a4[i*4+2*n*4+1];
a4[i*4+n*4+1] = tem1;
a4[i*4+1] = tem2;
double tem3 = a4[i*4] - tem2;
double tem4 = tem3 + a4[i*4+n*4];
a4[i*4+n*4+1] = tem3 + a4[i*4+n*4+1] (**);
}
we detect an interleaving load for (**) and emit it before the
later strided store to a4[i*4+n*4+1].
This issue is that vect_preserves_scalar_order_p expects to the
vectorization will happen via SLP but we will end up doing interleaving
which does not perform the load in place of the last load but in place
of ->first_element. Unfortunately SLP analysis is done _after_
dependence analysis. That means we have to conservatively assume both
paths may happen.
Fixed testcase:
void __attribute__((noinline,noclone))
foo (double *a4, int n)
{
for (int i = 0; i < n; ++i)
{
double tem1 = a4[i*4] + a4[i*4+n*4];
double tem2 = a4[i*4+2*n*4+1];
a4[i*4+n*4+1] = tem1;
a4[i*4+1] = tem2;
double tem3 = a4[i*4] - tem2;
double tem4 = tem3 + a4[i*4+n*4];
a4[i*4+n*4+1] = tem4 + a4[i*4+n*4+1];
}
}
int main(int argc, char **argv)
{
int n = 11;
double a4[4 * n * 8];
double a42[4 * n * 8];
for (int i = 0; i < 4 * n * 8; ++i)
a4[i] = a42[i] = i;
foo (a4, n);
for (int i = 0; i < n; ++i)
{
double tem1 = a42[i*4] + a42[i*4+n*4];
double tem2 = a42[i*4+2*n*4+1];
a42[i*4+n*4+1] = tem1;
a42[i*4+1] = tem2;
double tem3 = a42[i*4] - tem2;
double tem4 = tem3 + a42[i*4+n*4];
a42[i*4+n*4+1] = tem4 + a42[i*4+n*4+1];
__asm__ volatile ("": : : "memory");
}
for (int i = 0; i < 4 * n * 8; ++i)
if (a4[i] != a42[i])
__builtin_abort ();
return 0;
}
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Subject: [Bug tree-optimization/90018] [7/8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Wed, 10 Apr 2019 11:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.4 |7.5
Summary|[8 Regression] r265453 |[7/8/9 Regression] r265453
|miscompiled 527.cam4_r in |miscompiled 527.cam4_r in
|SPEC CPU 2017 |SPEC CPU 2017
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
The patch was backported further.
>From gcc-bugs-return-640260-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 11:45:39 2019
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Subject: [Bug gcov-profile/89959] gcov: "--long-file-names" is ignored when used in combination with "--hash-filenames"
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Apr 10 11:44:08 2019
New Revision: 270251
URL: https://gcc.gnu.org/viewcvs?rev=270251&root=gcc&view=rev
Log:
Make gcov docs more precise (PR gcov-profile/89959).
2019-04-10 Martin Liska <mliska@suse.cz>
PR gcov-profile/89959
* doc/gcov.texi: Make documentation of -x option
more precise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/gcov.texi
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Documentation fix applied, closing.
>From gcc-bugs-return-640262-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 11:56:01 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Wed, 10 Apr 2019 11:56:00 -0000
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--- Comment #57 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #56)
> I tried the fix, but now I get another error:
> /libstdc++-v3/../libgcc
> -I/usr/local/packages/gcc_9.0_fixincl/_build/x86_64-apple-darwin18.5.0/i386/
> libstdc++-v3/include/x86_64-apple-darwin18.5.0
> -I/usr/local/packages/gcc_9.0_fixincl/_build/x86_64-apple-darwin18.5.0/i386/
> libstdc++-v3/include
> -I/usr/local/packages/gcc_9.0_fixincl/libstdc++-v3/libsupc++ -std=gnu++17
> -D_GLIBCXX_SHARED -fno-implicit-templates -Wall -Wextra -Wwrite-strings
> -Wcast-qual -Wabi=2 -fdiagnostics-show-location=once -ffunction-sections
> -fdata-sections -frandom-seed=fs_dir.lo -fimplicit-templates -g -O2 -m32 -c
> ../../../../../../libstdc++-v3/src/c++17/fs_dir.cc -fno-common -DPIC
> -D_GLIBCXX_SHARED -o fs_dir.o
> ../../../../../../libstdc++-v3/src/c++17/fs_ops.cc:31:10: fatal error:
> filesystem: No such file or directory
> 31 | #include <filesystem>
> | ^~~~~~~~~~~~
> compilation terminated.
so, to be clear, it worked for the 8.x branch and you see a different issue for
trunk.
what stage is this at, and what version of trunk is it?
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Wed, 10 Apr 2019 12:04:00 -0000
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--- Comment #58 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> No such file or directory
> 31 | #include <filesystem>
> | ^~~~~~~~~~~~
> compilation terminated.
I think this is an older issue (on SSD?) for which there is already a filed PR.
When I hit this snag, I just resume the bootstrap process.
>From gcc-bugs-return-640264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 12:06:24 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #59 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Yes, to me this looks also like an independent problem, and it appears to me
like a sort of race condition. I also just restarted the bootstrap (without a
parallel make). Now I have to do some theoretical physics, will know more
tonight.
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
Date: Wed, 10 Apr 2019 12:08:00 -0000
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--- Comment #20 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
Confirmed that issue is fixed with the latest assembler [1].
[1]
as --version
GNU assembler (GNU Binutils) 2.32.51.20190410?
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Subject: [Bug target/90028] On Intel Skylake (-march=native) generated avx512 instruction can be wrong
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--- Comment #21 from Ferruh YIGIT <ferruh.yigit at intel dot com> ---
(In reply to Jakub Jelinek from comment #19)
> Upstream 2.31 and 2.31.1 is affected too, but 2.31 branch starting with
> August 2018 is not affected. As the fix has been backported also to 2.30
> branch, I guess 2.30 is affected too, 2.32 is not affected. Dunno about
> older binutils, you'll need to try.
Thanks.
We already have another problem with 2.30 and disabling avx512 for that case,
it seems we will need to extend it to 2.31 & 2.31.1 too, thanks.
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--- Comment #60 from Jonathan Wakely <redi at gcc dot gnu.org> ---
PR 81797 was the relevant bug, which apparently is still present for darwin
when using the buggy new APFS filesystem.
>From gcc-bugs-return-640268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 12:22:47 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Wed, 10 Apr 2019 12:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864
--- Comment #61 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #60)
> PR 81797 was the relevant bug, which apparently is still present for darwin
> when using the buggy new APFS filesystem
so, from discussion on IRC, and notes above, this seems to be a known issue
(with AFPS only) and the current remedy is to continue the bootstrap.
Let's consider that we have a viable work-around and then please can we wait
for a response from Apple and the clang devs before making a final fix?
(i.e. this is enough of a work-around to prevent folks from being blocked right
now)
>From gcc-bugs-return-640269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 12:28:13 2019
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Subject: [Bug rtl-optimization/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89965
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46129
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46129&action=edit
gcc9-pr89965.patch
Untested fix.
>From gcc-bugs-return-640270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 12:32:55 2019
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Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Wed, 10 Apr 2019 12:32:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Why does sel-sched try to propagate hard registers into insns before RA? The
whole point of the combiner changes was not to do that, so that the RA can do
better job.
>From gcc-bugs-return-640271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 12:37:12 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #62 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #61)
> (In reply to Jonathan Wakely from comment #60)
> > PR 81797 was the relevant bug, which apparently is still present for darwin
> > when using the buggy new APFS filesystem
>
> so, from discussion on IRC, and notes above, this seems to be a known issue
> (with AFPS only) and the current remedy is to continue the bootstrap.
>
> Let's consider that we have a viable work-around and then please can we wait
> for a response from Apple and the clang devs before making a final fix?
>
> (i.e. this is enough of a work-around to prevent folks from being blocked
> right now)
BTW if you look at
https://godbolt.org/z/7nwoLN
and flip between C and C++, you will see that clang++ is not generating the
same code for _Atomic int x, as clang (C). In fact, it looks like the
storage-class might well be accepted but ignored. If that's the case, the the
right fix is probably to substitute volatile unconditionally for C++.
(that is, the right guard would be Jakub's suggestion from comment #48)
>From gcc-bugs-return-640272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 12:56:36 2019
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Subject: [Bug tree-optimization/90018] [7/8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46130
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46130&action=edit
patch for GCC 8
I am testing the attached, now forward-porting to GCC 9.
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Subject: [Bug fortran/90030] Fortran OMP array data alignment
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openmp
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-10
Assignee|unassigned at gcc dot gnu.org |tschwinge at gcc dot gnu.org
Summary|Fortran OpenACC subarray |Fortran OMP array data
|data alignment |alignment
Ever confirmed|0 |1
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Reduced test case, added OpenMP variant.
<https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00380.html>.
>From gcc-bugs-return-640274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:11:50 2019
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Subject: [Bug c++/89875] [7/8/9 Regression] invalid typeof reference to a member of an incomplete struct accepted at function scope
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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CC| |jakub at gcc dot gnu.org,
| |paolo at gcc dot gnu.org
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>From gcc-bugs-return-640275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:25:35 2019
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Subject: [Bug tree-optimization/90018] [7/8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
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--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46131
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46131&action=edit
patch for GCC 9
So trunk, instead of grouping (a) and (b) groups (d) and (b), leaving (a)
alone.
for (int i = 0; i < n; ++i)
{
/* We may not apply interleaving to the group (a), (b) because of (c).
*/
double tem1 = a4[i*4] + a4[i*4+n*4] /* (a) */;
double tem2 = a4[i*4+2*n*4+1];
a4[i*4+n*4+1] = tem1; /* (c) */
a4[i*4+1] = tem2;
double tem3 = a4[i*4] - tem2;
double tem4 = tem3 + a4[i*4+n*4];
a4[i*4+n*4+1] = tem4 + a4[i*4+n*4+1] /* (b) */;
}
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Bug ID: 90035
Summary: Non-translatable C++ parser diagnostics
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tmp = concat ("types may not be defined in %<",
IDENTIFIER_POINTER (ridpointers[keyword]),
"%> expressions", NULL);
is not translatable.
>From gcc-bugs-return-640277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:35:30 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90024] [7/8 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Wed, 10 Apr 2019 13:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90024
--- Comment #3 from Matthew Malcomson <matmal01 at gcc dot gnu.org> ---
Author: matmal01
Date: Wed Apr 10 13:34:54 2019
New Revision: 270253
URL: https://gcc.gnu.org/viewcvs?rev=270253&root=gcc&view=rev
Log:
Backport of r270226 from mainline to gcc-7-branch
The "*neon_mov<mode>" patterns for 128 bit sized quantities uses the "Dn"
constraint to match vmov.f32 and vmov.i<vec-width> patterns.
This constraint boils down to using the `neon_immediate_valid` function.
Once the constraint has matched, the output C statement asserts that function
passes.
The output C statement calls `neon_immediate_valid` with the mode taken from
the
iterator, while the constraint takes the mode from the operand.
This can cause a discrepency when the operand is a CONST_INT, as the constraint
passes VOIDmode which `neon_immediate_valid` treats as DImode, while the C
statement passes the mode of the iterator which can be TImode.
When this happens, the `neon_immediate_valid` can fail in the second call (if
e.g. the CONST_INT is a valid immediate in DImode but not TImode) which would
trigger the assertion.
The testcase added with this patch triggers this when compiled with an arm
cross
compiler using the command line below.
gcc -march=armv8-a -c neon-immediate-timode.c -O1 -mfloat-abi=hard
-mfpu=neon-fp-armv8
This patch splits the original "Dn" constraint into three new constraints, "DN"
for TImode CONST_INT, "Dn" for DImode CONST_INT, and "Dm" for CONST_VECTOR.
Splitting things up this way requires using one extra alternative in the
"*neon_mov<mode>" patterns, but makes it clear from the constraint what mode is
being used.
We also remove the behaviour of treating VOIDmode as DImode in
`neon_valid_immediate` since the original "Dn" constraint was the only place
that functionality was used. VOIDmode is now never passed to that function.
An assertion has been added to the function to ensure this problem is caught
earlier on.
bootstrapped and regtested on arm-none-linux-gnueabihf
gcc/ChangeLog:
2019-04-10 Matthew Malcomson <matthew.malcomson@arm.com>
PR target/90024
* config/arm/arm.c (neon_valid_immediate): Disallow VOIDmode parameter.
* config/arm/constraints.md (Dm, DN, Dn): Split previous Dn constraint
into three.
* config/arm/neon.md (*neon_mov<mode>): Account for TImode and DImode
differences directly.
(*smax<mode>3_neon, vashl<mode>3, vashr<mode>3_imm): Use Dm constraint.
gcc/testsuite/ChangeLog:
2019-04-10 Matthew Malcomson <matthew.malcomson@arm.com>
PR target/90024
* gcc.dg/torture/neon-immediate-timode.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/neon-immediate-timode.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/arm/arm.c
branches/gcc-7-branch/gcc/config/arm/constraints.md
branches/gcc-7-branch/gcc/config/arm/neon.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:41:58 2019
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From: "matmal01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90024] [7/8 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Wed, 10 Apr 2019 13:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90024
--- Comment #4 from Matthew Malcomson <matmal01 at gcc dot gnu.org> ---
Author: matmal01
Date: Wed Apr 10 13:41:21 2019
New Revision: 270254
URL: https://gcc.gnu.org/viewcvs?rev=270254&root=gcc&view=rev
Log:
Backport of r270226 from mainline to gcc-8-branch
The "*neon_mov<mode>" patterns for 128 bit sized quantities uses the "Dn"
constraint to match vmov.f32 and vmov.i<vec-width> patterns.
This constraint boils down to using the `neon_immediate_valid` function.
Once the constraint has matched, the output C statement asserts that function
passes.
The output C statement calls `neon_immediate_valid` with the mode taken from
the
iterator, while the constraint takes the mode from the operand.
This can cause a discrepency when the operand is a CONST_INT, as the constraint
passes VOIDmode which `neon_immediate_valid` treats as DImode, while the C
statement passes the mode of the iterator which can be TImode.
When this happens, the `neon_immediate_valid` can fail in the second call (if
e.g. the CONST_INT is a valid immediate in DImode but not TImode) which would
trigger the assertion.
The testcase added with this patch triggers this when compiled with an arm
cross
compiler using the command line below.
gcc -march=armv8-a -c neon-immediate-timode.c -O1 -mfloat-abi=hard
-mfpu=neon-fp-armv8
This patch splits the original "Dn" constraint into three new constraints, "DN"
for TImode CONST_INT, "Dn" for DImode CONST_INT, and "Dm" for CONST_VECTOR.
Splitting things up this way requires using one extra alternative in the
"*neon_mov<mode>" patterns, but makes it clear from the constraint what mode is
being used.
We also remove the behaviour of treating VOIDmode as DImode in
`neon_valid_immediate` since the original "Dn" constraint was the only place
that functionality was used. VOIDmode is now never passed to that function.
An assertion has been added to the function to ensure this problem is caught
earlier on.
bootstrapped and regtested on arm-none-linux-gnueabihf
gcc/ChangeLog:
2019-04-10 Matthew Malcomson <matthew.malcomson@arm.com>
PR target/90024
* config/arm/arm.c (neon_valid_immediate): Disallow VOIDmode parameter.
* config/arm/constraints.md (Dm, DN, Dn): Split previous Dn constraint
into three.
* config/arm/neon.md (*neon_mov<mode>): Account for TImode and DImode
differences directly.
(*smax<mode>3_neon, vashl<mode>3, vashr<mode>3_imm): Use Dm constraint.
gcc/testsuite/ChangeLog:
2019-04-10 Matthew Malcomson <matthew.malcomson@arm.com>
PR target/90024
* gcc.dg/torture/neon-immediate-timode.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/neon-immediate-timode.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/arm/arm.c
branches/gcc-8-branch/gcc/config/arm/constraints.md
branches/gcc-8-branch/gcc/config/arm/neon.md
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:46:15 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Wed, 10 Apr 2019 13:46:00 -0000
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--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Well, often sel-sched just does not discriminate hardregs and pseudos when
checking if renaming/substitution may be applied. Sure, as a matter of
efficiency we should probably disallow substitution through such mixed
pseudo=hardreg assignments.
Nevertheless, if it's not only a matter of optimization, but also of internal
consistency, then I'd like to understand it better. Hence the question in
comment #2.
>From gcc-bugs-return-640280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:48:53 2019
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Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Wed, 10 Apr 2019 13:48:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is not a matter of efficiency, but primarily that RA can't do anything in
many cases after propagating hard registers into instructions. This PR is just
one of the many cases.
>From gcc-bugs-return-640281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:54:33 2019
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Subject: [Bug translation/90035] Non-translatable C++ parser diagnostics
Date: Wed, 10 Apr 2019 13:54:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-10
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46132
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46132&action=edit
gcc9-pr90035.patch
Untested fix.
>From gcc-bugs-return-640282-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 13:55:28 2019
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Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
CCing Segher and Vlad on this if they want to comment on that further.
>From gcc-bugs-return-640283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 14:34:03 2019
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Subject: [Bug preprocessor/90034] gcc hangs on wait4 after vfork after opening tmp file
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--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
[...]
>
> Smaller testcase that will hang:
>
> #line 1 "/dev/stdout"
> #def xy
Presumably we're blocked, waiting on ourselves to write something to our
stdout so that we can read it.
I was able to reproduce this hang with gcc 4.8.3, so this isn't a regression.
> we should probably check whether the file we opened is a regular file
> before trying to read from it.
[...]
$ ll /dev/stdout
lrwxrwxrwx. 1 root root 15 Nov 26 09:29 /dev/stdout -> /proc/self/fd/1
$ ll /proc/self/fd/1
lrwx------. 1 david david 64 Apr 10 11:13 /proc/self/fd/1 -> /dev/pts/8
$ ll /dev/pts/8
crw--w----. 1 david tty 136, 8 Apr 10 11:14 /dev/pts/8
Presumably we ought to support source "files" that are symlinks; should we
resolve all symlinks before opening, and then require the result to be a
regular file?
Or some other kind of sanity-checking?
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Subject: [Bug preprocessor/90034] gcc hangs on wait4 after vfork after opening tmp file
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--- Comment #4 from Andreas Schwab <schwab@linux-m68k.org> ---
You get the resolve part for free by opening it.
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Subject: [Bug other/89394] libiberty :stack overflow in nm
Date: Wed, 10 Apr 2019 14:45:00 -0000
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--- Comment #7 from Nick Clifton <nickc at gcc dot gnu.org> ---
Author: nickc
Date: Wed Apr 10 14:44:47 2019
New Revision: 270258
URL: https://gcc.gnu.org/viewcvs?rev=270258&root=gcc&view=rev
Log:
Fix a stack exhaustion bug in libiberty's demangler when decoding a
pathalogically constructed mangled name.
PR 89394
* cp-demangle.c (cplus_demangle_fill_name): Reject negative
lengths.
(d_count_templates_scopes): Replace num_templates and num_scopes
parameters with a struct d_print_info pointer parameter. Adjust
body of the function accordingly. Add recursion counter and check
that the recursion limit is not reached.
(d_print_init): Pass dpi parameter to d_count_templates_scopes.
Reset recursion counter afterwards, unless the recursion limit was
reached.
Modified:
trunk/libiberty/ChangeLog
trunk/libiberty/cp-demangle.c
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Subject: [Bug target/54412] minimal 32-byte stack alignment with -mavx on 64-bit Windows
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Dmitry Kazakov <dimula73 at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |dimula73 at gmail dot com
--- Comment #25 from Dmitry Kazakov <dimula73 at gmail dot com> ---
Hi, all!
I would like to add one more test file, related to the problem. If GCC tries to
call a function, that accepts a __m256 register as a parameter, it unloads this
parameter into the stack using an **aligned** move (vmovaps), but the alignment
guarantee on Windows is only 16-byte. It means that the application will crash
because of unaligned memory access.
Affected versions: GCC 7.3.0 (MinGW64), GCC 8.1.0 (MinGW64)
Here is the testing source (see also in an attachment):
#include <intrin.h>
struct X {
alignas(32) __m256 d;
};
void g1(X);
void g2(const X&);
void g3(const void *);
void f(float *ptr) {
X x = {_mm256_load_ps(ptr)};
g1(x); // BUG: passes via unaligned (whatever rsp alignment is) stack
g2(x); // OK: passes via aligned stack location
g3(&x); // OK: passes via aligned stack location
}
Compiled result (-O2 -march=skylake):
_Z1fPf:
.LFB5135:
pushq %rbx
.seh_pushreg %rbx
addq $-128, %rsp
.seh_stackalloc 128
.seh_endprologue
vmovaps (%rcx), %ymm0
leaq 95(%rsp), %rbx
leaq 32(%rsp), %rcx
andq $-32, %rbx
vmovaps %ymm0, (%rbx) # %rbx is properly aligned
vmovaps %ymm0, 32(%rsp) # %rsp may be unaligned
vzeroupper
call _Z2g11X
movq %rbx, %rcx
call _Z2g2RK1X
movq %rbx, %rcx
call _Z2g3PKv
nop
subq $-128, %rsp
popq %rbx
ret
Related bug in Vc library: https://github.com/VcDevel/Vc/issues/241
Related bug in Krita: https://bugs.kde.org/show_bug.cgi?id=406209
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--- Comment #26 from Dmitry Kazakov <dimula73 at gmail dot com> ---
Created attachment 46133
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46133&action=edit
Test source for unaligned pass-by-value crash
Test file for the comment above
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--- Comment #27 from Dmitry Kazakov <dimula73 at gmail dot com> ---
As a workaround, one can either use __attribute__((always_inline)) for *all*
the functions accepting __m256 or pass *all* arguments by const-ref. Const-ref
arguments are passed correctly.
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Subject: [Bug other/89394] libiberty :stack overflow in nm
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Nick Clifton <nickc at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Nick Clifton <nickc at gcc dot gnu.org> ---
The patch has now been committed.
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Subject: [Bug c/90036] New: False positive: directive argument is null [-Werror=format-overflow=]
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Bug ID: 90036
Summary: False positive: directive argument is null
[-Werror=format-overflow=]
Product: gcc
Version: 8.3.1
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See https://sourceware.org/bugzilla/show_bug.cgi?id=24440:
Compiling most recent binutils (git/master - commit
b05971a652c35ed72d3c95290e18) with gcc 8.3.1 20190330 fails with:
make[4]: Entering directory '/root/binutils/binutils'
gcc -DHAVE_CONFIG_H -I. -I/git/binutils-gdb/binutils -I.
-I/git/binutils-gdb/binutils -I../bfd -I/git/binutils-gdb/binutils/..
/bfd -I/git/binutils-gdb/binutils/../include
-DLOCALEDIR="\"/usr/local/share/locale\""
-Dbin_dummy_emulation=bin_vanilla_emulat
ion -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow
-Wstack-usage=262144 -Werror -O2 -pipe -g -MT wrstabs.o -MD -M
P -MF .deps/wrstabs.Tpo -c -o wrstabs.o /git/binutils-gdb/binutils/wrstabs.c
/git/binutils-gdb/binutils/wrstabs.c: In function ‘stab_start_class_type’:
/git/binutils-gdb/binutils/wrstabs.c:1476:25: error: ‘%s’ directive argument is
null [-Werror=format-overflow=]
sprintf (vtable, "~%%%s", vstring);
^~
cc1: all warnings being treated as errors
make[4]: *** [Makefile:1061: wrstabs.o] Error 1
The code snippet is:
vtable = (char *) xmalloc (strlen (vstring) + 3);
sprintf (vtable, "~%%%s", vstring);
free (vstring);
Comment 1 (https://sourceware.org/bugzilla/show_bug.cgi?id=24440#c1) says:
> That doesn't make sense. vstring must be non-null since it has been passed to strlen already.
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Subject: [Bug target/90024] [7/8 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Wed, 10 Apr 2019 14:57:00 -0000
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Matthew Malcomson <matmal01 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Matthew Malcomson <matmal01 at gcc dot gnu.org> ---
Fixed
>From gcc-bugs-return-640292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 14:58:01 2019
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Subject: [Bug target/90024] [7/8 Regression] ICE on AArch32 NEON mov with TImode constant.
Date: Wed, 10 Apr 2019 14:58:00 -0000
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Matthew Malcomson <matmal01 at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-640293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 14:59:19 2019
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Subject: [Bug other/89395] libiberty: heap buffer overflow in nm
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Nick Clifton <nickc at gcc dot gnu.org> changed:
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--- Comment #4 from Nick Clifton <nickc at gcc dot gnu.org> ---
The patch recently applied for PR 89394 also appears to fix this PR.
>From gcc-bugs-return-640294-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:07:04 2019
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Subject: [Bug sanitizer/89832] confusing error message when there is a problem with ASAN_OPTIONS "ERROR: expected '='"
Date: Wed, 10 Apr 2019 15:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89832
--- Comment #6 from qinzhao at gcc dot gnu.org ---
one question to Martin:
has the proposed patch been committed in gcc9 upstream?
my understanding is the proposed patch is for LLVM source base, not for GCC.
are you planning to port the patch to gcc9?
>From gcc-bugs-return-640295-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:11:49 2019
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Subject: [Bug c++/51277] Feature request: improve C++ diagnostic for ambiguous overloads
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Feature request: C++ |Feature request: improve
|diagnostic for ambiguous |C++ diagnostic for
|overloads |ambiguous overloads
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
retitling to clarify that this isn't about adding a new diagnostic, but rather
improving an existing one
>From gcc-bugs-return-640296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:14:34 2019
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Subject: [Bug preprocessor/90034] gcc hangs on wait4 after vfork after opening tmp file
Date: Wed, 10 Apr 2019 15:14:00 -0000
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(gdb) call fileno(c->fp)
$3 = 4
(gdb) info inferior
Num Description Executable
* 1 process 35251 /home/david/coding-3/gcc-git-bugfixing/build/gcc/cc1
(gdb) shell ls -al /proc/35251/fd
total 0
dr-x------. 2 david david 0 Apr 10 12:02 .
dr-xr-xr-x. 9 david david 0 Apr 10 12:02 ..
lrwx------. 1 david david 64 Apr 10 12:02 0 -> /dev/pts/8
lrwx------. 1 david david 64 Apr 10 12:02 1 -> /dev/pts/8
lrwx------. 1 david david 64 Apr 10 12:02 2 -> /dev/pts/8
l-wx------. 1 david david 64 Apr 10 12:02 3 -> /tmp/ccE3XfON.s
lr-x------. 1 david david 64 Apr 10 12:02 4 -> /dev/pts/8
which shows that I can type at the terminal during the hang, and then Ctrl-D to
inject what the content of "/dev/stdout" should be:
$ ./xgcc -B. -c ../../src/pr90034.c
Hello world
/dev/stdout:1:2: error: invalid preprocessing directive #def; did you mean
#ifdef?
1 | Hello world
| ^~~
| ifdef
>From gcc-bugs-return-640297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:23:54 2019
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Subject: [Bug preprocessor/89971] [8/9 Regression] ICE: unspellable token PADDING
Date: Wed, 10 Apr 2019 15:23:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'm afraid I need to give up on this. While PR30805 added some code not to
abort even earlier on this, it aborts during diagnostics later, while I believe
it should be accepted. Unfortunately
#define a(x) int b /##x;
a()
doesn't even go through the paste_all_tokens path, the PASTE_LEFT is lost
somewhere much earlier and I can't figure out where.
>From gcc-bugs-return-640298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:24:55 2019
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Subject: [Bug middle-end/90037] New: [9 Regression] -Wnull-dereference false positive after r269302
Date: Wed, 10 Apr 2019 15:24:00 -0000
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Bug ID: 90037
Summary: [9 Regression] -Wnull-dereference false positive after
r269302
Product: gcc
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Created attachment 46134
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46134&action=edit
Test case.
The false positive for the attached test case was reported in
https://bugzilla.redhat.com/show_bug.cgi?id=1698478:
$ gcc -O2 -S -Wall -Wextra -Wnull-dereference bz1698478.c
bz1698478.c: In function ‘parse_with_separator’:
bz1698478.c:121:14: warning: potential null pointer dereference
[-Wnull-dereference]
121 | grp = (*g == '+' ? 0 : getgrnam (g));
| ^~
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Subject: [Bug middle-end/90037] [9 Regression] -Wnull-dereference false positive after r269302
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
URL| |https://bugzilla.redhat.com
| |/show_bug.cgi?id=1698478
Known to work| |8.3.0
Blocks| |86172
Known to fail| |9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Bisection points to r269302:
r269302 | rguenth | 2019-03-01 04:21:30 -0500 (Fri, 01 Mar 2019) | 16 lines
2019-03-01 Richard Biener <rguenther@suse.de>
PR middle-end/89497
* tree-cfgcleanup.h (cleanup_tree_cfg): Add SSA update flags
argument, defaulted to zero.
* passes.c (execute_function_todo): Pass down SSA update flags
to cleanup_tree_cfg.
* tree-cfgcleanup.c: Include tree-into-ssa.h and tree-cfgcleanup.h.
(cleanup_tree_cfg_noloop): After cleanup_control_flow_pre update SSA
form if requested.
(cleanup_tree_cfg): Get and pass down SSA update flags.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86172
[Bug 86172] [meta-bug] issues with -Wnull-dereference
>From gcc-bugs-return-640300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:28:45 2019
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From: "js at alien8 dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/69549] Named Address Spaces does not compile in C++
Date: Wed, 10 Apr 2019 15:28:00 -0000
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Julian Stecklina <js at alien8 dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |js at alien8 dot de
--- Comment #3 from Julian Stecklina <js at alien8 dot de> ---
This is still an issue with 8.3.1.
>From gcc-bugs-return-640301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:28:49 2019
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/90034] gcc hangs on wait4 after vfork after opening tmp file
Date: Wed, 10 Apr 2019 15:28:00 -0000
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--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to Andreas Schwab from comment #4)
> You get the resolve part for free by opening it.
Thanks.
I'm wondering what the best cross-platform test ought to be.
Maybe something like this to input.c's add_file_to_cache_tab:
int fd = fileno (fp);
if (fstat (fd, &buf) == -1)
{
/* reject due to error */
fclose (fp);
return NULL;
}
if (!S_ISREG(buf.st_mode))
{
/* reject: not a regular file */
fclose (fp);
return NULL;
}
/* carry on */
input.c is re-reading the source file after the frontend has already opened it,
so this isn't going to work for pipes, and, as you mention, the resolution of
symlinks already happened when fp was opened.
>From gcc-bugs-return-640302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:42:03 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Wed, 10 Apr 2019 15:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-10
CC| |jakub at gcc dot gnu.org,
| |law at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I guess for this warning we don't have anything like predicate-aware analysis
that would find out that while we have:
...
<bb 25> [local count: 484313586]:
# unum_167 = PHI <unum_54(39), unum_34(41)>
# iftmp.1_152 = PHI <iftmp.1_174(39), iftmp.1_113(41)>
# PT = null { D.3872 D.3873 } (escaped, escaped heap)
# ALIGN = 8, MISALIGN = 0
# u_154 = PHI <0B(39), u_87(41)>
_19 = *iftmp.1_152;
...
# PT = nonlocal
iftmp.1_174 = separator_63(D) + 1;
...
# PT = nonlocal null
# iftmp.1_113 = PHI <0B(11), iftmp.1_119(42)>
we have also:
_25 = iftmp.1_113 != 0B;
_130 = error_msg_46 == 0B;
_127 = _25 & _130;
if (_127 != 0)
goto <bb 25>; [100.00%]
else
goto <bb 31>; [0.00%]
in bb 41 and thus iftmp.1_113 is known to be non-NULL.
>From gcc-bugs-return-640303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:56:41 2019
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
Date: Wed, 10 Apr 2019 15:56:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
CC| |paolo.carlini at oracle dot com
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Clearly, an important difference between sfinae65.C (the test added in r269965
for c++/86932) and the new testcase is that here we have a type parameter pack,
which, as such, cannot refer to another parameter. Thus I'm wondering if
restricting the fix for c++/86932 like:
Index: pt.c
===================================================================
--- pt.c (revision 270223)
+++ pt.c (working copy)
@@ -8475,7 +8475,8 @@ coerce_template_parms (tree parms,
arg = NULL_TREE;
if (template_parameter_pack_p (TREE_VALUE (parm))
- && (arg || !(complain & tf_partial))
+ && (arg || !(complain & tf_partial)
+ || TREE_CODE (TREE_VALUE (parm)) == TYPE_DECL)
&& !(arg && ARGUMENT_PACK_P (arg)))
{
/* Some arguments will be placed in the
would not go a long way toward resolving the problem. Passes testing, seems a
safe change to me.
>From gcc-bugs-return-640304-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 15:59:55 2019
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Subject: [Bug target/81800] [8/9 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Patches should be pinged after a week if they aren't reviewed, furthermore, it
is better to CC explicitly relevant maintainers.
>From gcc-bugs-return-640305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 16:46:23 2019
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From: "jb at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libfortran/90038] New: execute_command_line should not use fork()
Date: Wed, 10 Apr 2019 16:46:00 -0000
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Bug ID: 90038
Summary: execute_command_line should not use fork()
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: libfortran
Assignee: unassigned at gcc dot gnu.org
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Occasionally there are problems like
https://stackoverflow.com/questions/55120720/fortran-execute-command-line-runtime-error-depends-on-memory-consumption
where execute_command_line (or system()) fails because the calling process uses
a lot of memory.
As of October 2018 glibc system() uses posix_spawn() instead of fork(), so this
problem should largely solve itself over time on Linux/glibc targets.
However, in execute_command_line there is still a usage of fork() remaining (in
case WAIT=.FALSE.). This should be fixed.
See also
https://www.microsoft.com/en-us/research/uploads/prod/2019/04/fork-hotos19.pdf
>From gcc-bugs-return-640306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 16:55:32 2019
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug demangler/90039] New: libiberty demangling _GLOBAL__sub_I__Z11print_tracev
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Bug ID: 90039
Summary: libiberty demangling _GLOBAL__sub_I__Z11print_tracev
Product: gcc
Version: unknown
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Created attachment 46135
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46135&action=edit
binary elf
addr2line and c++filt rely upon libiberty demangling
Could it be improved to handle _GLOBAL_ symbols?
$ c++filt _GLOBAL__sub_I__Z11print_tracev
_GLOBAL__sub_I__Z11print_tracev
$
$ c++filt _Z11print_tracev
print_trace()
$
$ c++filt --version
GNU c++filt (GNU Binutils for Ubuntu) 2.30
$ addr2line -f -C -e exception4 0x0000000000001600
_GLOBAL__sub_I__Z11print_tracev
/home/jonny/code/crash/exception4.cpp:100
Maybe the "_GOBAL_" prefix just needs to be stripped?
I had filed this before on binutils
https://sourceware.org/bugzilla/show_bug.cgi?id=24403
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From: "zhroma at ispras dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/84032] ICE in optimize_sc, at modulo-sched.c:1064
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Roman Zhuykov <zhroma at ispras dot ru> changed:
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----------------------------------------------------------------------------
CC| |zhroma at ispras dot ru
--- Comment #3 from Roman Zhuykov <zhroma at ispras dot ru> ---
Created attachment 46136
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46136&action=edit
Proposed patch
>From gcc-bugs-return-640308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 17:16:40 2019
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From: "zhroma at ispras dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/84032] ICE in optimize_sc, at modulo-sched.c:1064
Date: Wed, 10 Apr 2019 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84032
--- Comment #4 from Roman Zhuykov <zhroma at ispras dot ru> ---
There is the following mistake in logic behind the code.
We want to schedule the branch instructions only as a last instruction in a
row. But when branch was scheduled and we add other instructions into partial
schedule, we sometimes allow them to be in same row after the branch.
The issue happens later when we try to reschedule branch into another row,
algorithm there works like this:
(1) Remove branch from the row where it is (say, “previous rowâ€)
(2) Try insert into the needed row
(3) If success – OK, continue scheduling other instructions
(4) But when inserting (2) was not done – insert it back into “previous rowâ€
and this insertion must be certainly successful, which is checked by assertion.
But when on step (1) branch in not last in a row there is no guarantee, that on
step (4) we could insert it back, because there we will try only last-in-a-row
position for it.
Proposed patch solves this totally preventing other instructions to be
scheduled after branch in the same row.
Patch was successfully bootstrapped and regtested with few other patches on
x86_64. In cross-compiler mode to s390, spu, aarch64, arm, ia64, ppc and ppc64
patch was regtested, and also with -fmodulo-sched enabled by default.
All same testing also done on 8 branch. No new failures introduced.
diff --git a/gcc/modulo-sched.c b/gcc/modulo-sched.c
--- a/gcc/modulo-sched.c
+++ b/gcc/modulo-sched.c
@@ -2996,9 +2996,7 @@ ps_insn_find_column (partial_schedule_ptr ps, ps_insn_ptr
ps_i,
last_must_precede = next_ps_i;
}
/* The closing branch must be the last in the row. */
- if (must_precede
- && bitmap_bit_p (must_precede, next_ps_i->id)
- && JUMP_P (ps_rtl_insn (ps, next_ps_i->id)))
+ if (JUMP_P (ps_rtl_insn (ps, next_ps_i->id)))
return false;
last_in_row = next_ps_i;
>From gcc-bugs-return-640309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 17:19:18 2019
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Subject: [Bug target/87979] ICE in compute_split_row at modulo-sched.c:2393
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Roman Zhuykov <zhroma at ispras dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zhroma at ispras dot ru
--- Comment #1 from Roman Zhuykov <zhroma at ispras dot ru> ---
Created attachment 46137
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46137&action=edit
Proposed patch
>From gcc-bugs-return-640310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 17:22:02 2019
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Subject: [Bug target/87979] ICE in compute_split_row at modulo-sched.c:2393
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--- Comment #2 from Roman Zhuykov <zhroma at ispras dot ru> ---
Situation is same in the following tests on ia64 platform with -fmodulo-sched
enabled (with any of O1, O2, Os):
gcc.dg/torture/pr82762.c
gcc.c-torture/execute/20170419-1.c
We divide by zero when we try to schedule loop body in zero cycles. Both
res_mii and rec_mii estimations equals zero. We have to start with one cycle in
this situation.
Patch was successfully bootstrapped and regtested with few other patches on
x86_64. In cross-compiler mode to s390, spu, aarch64, arm, ia64, ppc and ppc64
patch was regtested, and also with -fmodulo-sched enabled by default.
All same testing also done on 8 branch. Mentioned ia64 tests were the only
difference.
diff --git a/gcc/modulo-sched.c b/gcc/modulo-sched.c
--- a/gcc/modulo-sched.c
+++ b/gcc/modulo-sched.c
@@ -1597,6 +1597,7 @@ sms_schedule (void)
mii = 1; /* Need to pass some estimate of mii. */
rec_mii = sms_order_nodes (g, mii, node_order, &max_asap);
mii = MAX (res_MII (g), rec_mii);
+ mii = MAX (mii, 1);
maxii = MAX (max_asap, MAXII_FACTOR * mii);
if (dump_file)
>From gcc-bugs-return-640311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 17:25:35 2019
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Subject: [Bug target/84369] test case gcc.dg/sms-10.c fails on power9
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Roman Zhuykov <zhroma at ispras dot ru> changed:
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----------------------------------------------------------------------------
CC| |zhroma at ispras dot ru
--- Comment #3 from Roman Zhuykov <zhroma at ispras dot ru> ---
I compared modulo-sched DDGs in “power8 vs power9†modes and main difference is
not combined instruction mentioned by Peter, but movsi_internal1 dependencies
cost. For this two instructions:
(insn 23 22 25 4 (set (mem:SI (plus:DI (reg/f:DI 126 [
regstat_n_sets_and_refs.1_9 ])
(reg:DI 141 [ ivtmp.26 ])) [2 MEM[base:
regstat_n_sets_and_refs.1_9, index: ivtmp.26_35, offset: 0B]+0 S4 A32])
(reg:SI 148 [ _7->n_refs ])) "sms-10.c":50:40 502 {*movsi_internal1}
(expr_list:REG_DEAD (reg:SI 148 [ _7->n_refs ])
(nil)))
(insn 32 31 33 4 (set (mem:SI (plus:DI (reg/f:DI 159)
(reg:DI 141 [ ivtmp.26 ])) [2 MEM[base: _44, index:
ivtmp.26_35, offset: 0B]+0 S4 A32])
(reg:SI 154)) "sms-10.c":51:40 502 {*movsi_internal1}
(expr_list:REG_DEAD (reg:SI 154)
(nil)))
insn_default_latency (and then insn_sched_cost) function returns significantly
different values: 5 for power8, 0 for power9.
There are other movsi_internal1 instructions in this loop, their cost also
differ, but it’s only 1 cycle “3 vs 4†change, hopefully it is correct.
The same thing (“5 vs 0†cost) also broke this test on 32-bit powerpc. There
are no combining difference there, only the cost issue, but it also prevents
modulo-sched to succeed.
I’m not familiar with .md files, so I ask somebody to look at “5 vs 0†issue.
If such cost difference is correct, then it seems a good solution just to skip
this test on power9 cpus.
>From gcc-bugs-return-640312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 17:44:23 2019
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Subject: [Bug rtl-optimization/90040] New: [meta-bug] modulo-scheduler and partitioning issues
Date: Wed, 10 Apr 2019 17:44:00 -0000
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Bug ID: 90040
Summary: [meta-bug] modulo-scheduler and partitioning issues
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Here I want to discuss the situation with modulo scheduler pass when
-freorder-blocks-and-partition is also enabled.
TL;DR Kindly ask RTL folks to fix ICE happening in
cfg_layout_redirect_edge_and_branch_force while trying to redirect a crossing
jump.
--
The problem here is not in modulo scheduler algorithm itself, but in pass
initialization (and finalization) procedures. It enter (and later finally
leaves) cfg_layout mode, it also calls loop_optimizer_init. And all this stuff
leads to many branch redirections, which should successfully happen after
partitioning in bbro pass.
This issue is not new, at least here
https://gcc.gnu.org/ml/gcc-patches/2011-07/msg01811.html
I found that entering cfg_layout broke things on x86 (where required doloop
pattern is absent), and introduce an idea to move the sms pass before bbro. But
later I got this thought from Richard
https://gcc.gnu.org/ml/gcc-patches/2011-10/msg01526.html
and I agree that we have to fix it in another way.
Now in 2019, we got at least five bugs about the same situation. I want to
connect them all into this discussion.
First to say, PR85408 and PR87329 are open now, PR87475 is fixed, but they all
are about the same assertion
«internal compiler error: in patch_jump_insn, at cfgrtl.c:1271». PR87475 was
fixed by Jakub back in November by r266219, and two other were later reported
unreproducible, so, IMHO, they are fixed now too.
Jakub's ChangeLog:
PR rtl-optimization/87475
* cfgrtl.c (patch_jump_insn): Allow redirection failure for
CROSSING_JUMP_P insns.
(cfg_layout_redirect_edge_and_branch): Don't ICE if ret is NULL.
Second, I want to discuss PR85426, where first buggy assertion was same as in
that three PRs, but after Jakub’s fix, Arseny reports another fallen assertion:
«internal compiler error: in cfg_layout_redirect_edge_and_branch_force, at
cfgrtl.c:4482»
And this last assertion is the real issue -- that happens when we call
redirect_edge_and_branch_force for crossing jump. I’m not familiar with
partitioning, so have no idea how to fix this.
Hopefully, if we find a fix for this, PR89116 would also be fixed, although
situation there in not absolutely the same — there we ICE on same assertion
only in split_edge_and_insert while running generate_prolog_epilog, so this
happens only after SMS succeeded to create a schedule.
[Appendix 1] I want to mention PR83886 also, which was fixed by Honza with the
following ChangeLog:
PR rtl/84058
* cfgcleanup.c (try_forward_edges): Do not give up on crossing
jumps; choose last target that matches the criteria (i.e.
no partition changes for non-crossing jumps).
* cfgrtl.c (cfg_layout_redirect_edge_and_branch): Add basic
support for redirecting crossing jumps to non-crossing.
So here we have also some change with crossing jumps redirection.
[Appendix 2] There are also some issues with entering/exiting cfg_layout.
Technically, all of them are fixed right now: PR83771, PR83475 (fixed together
with PR81791).
But I wonder maybe this all is just latent, because in other passes I see a
special check to prevent entering cfg_layout after partitioning.
For example in hw-doloop.c we have:
/* We can't enter cfglayout mode anymore if basic block partitioning
already happened. */
if (do_reorder && !crtl->has_bb_partition)
This condition were added back in 2014
https://gcc.gnu.org/ml/gcc-patches/2014-01/msg00282.html and that time it looks
like:
if (do_reorder && !flag_reorder_blocks_and_partition)
And later were adjusted by Honza to current state:
https://gcc.gnu.org/ml/gcc-patches/2017-06/msg00515.html
But we dont have any check like this in modulo scheduler. There we certainly
can’t proceed without entering cfg_layout, so I’m not sure it would be a good
idea to add such a check. But maybe we have now some more latent bugs with
entering cfg_layout after partitioning?
[Appendix 3] Last month I spent a lot of time updating my patches described
here
https://gcc.gnu.org/ml/gcc-patches/2017-02/msg01647.html
and have locally added several other patches to fix most of modulo-sched PRs
from bugzilla, but annoying issue described here prohibits me to test my branch
in all possible scenarios.
I'll try to add some comments into all other modulo scheduler bugzilla PRs this
or next week while we are on stage 4.
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Subject: [Bug c/90036] [8/9 Regression] false positive: directive argument is null [-Werror=format-overflow=]
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |diagnostic
Last reconfirmed| |2019-04-10
CC| |msebor at gcc dot gnu.org
Blocks| |85741
Ever confirmed|0 |1
Summary|False positive: directive |[8/9 Regression] false
|argument is null |positive: directive
|[-Werror=format-overflow=] |argument is null
| |[-Werror=format-overflow=]
Known to fail| |8.3.0, 9.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
(When reporting bugs we ask for a test case. Please see
https://www.gnu.org/software/gcc/bugs).
That said, I can reproduce the warning with the top of trunk and with GCC 8.
The reason why the warning is issued for sprintf and not for strlen is because
it is implemented differently between the two functions (it runs on different
IL).
The null in the IL is the result of the jump threading optimization. The
warning can be suppressed by adding 'assert (vstring)' just above the sprintf
call.
Here's the IL the warning code sees:
stab_start_class_type (void * p, const char * tag, unsigned int id, bfd_boolean
structp, unsigned int size, bfd_boolean vptr, bfd_boolean ownvptr)
{
...
<bb 8> [local count: 237404318]:
if (ownvptr_24(D) != 0)
goto <bb 9>; [100.00%]
else
goto <bb 15>; [0.00%]
...
<bb 15> [local count: 0]:
_51 = strlen (0B);
_59 = _51 + 3;
vtable_16 = xmalloc (_59);
sprintf (vtable_16, "~%%%s", 0B);
_18 = MEM[(struct stab_write_handle *)p_22(D)].type_stack;
_18->vtable = vtable_16;
goto <bb 14>; [100.00%]
}
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85741
[Bug 85741] [meta-bug] bogus/missing -Wformat-overflow
>From gcc-bugs-return-640314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 19:24:04 2019
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Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
Date: Wed, 10 Apr 2019 19:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90007
--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> Why does sel-sched try to propagate hard registers into insns before RA?
> The whole point of the combiner changes was not to do that, so that the RA
> can do better job.
That, and *correctness*. Propagating hard registers can lead to things that
cannot be reloaded. Even in the simple case here you cannot necessarily
replace the hard reg with a pseudo and end up with valid code.
>From gcc-bugs-return-640315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 19:54:52 2019
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89722] [8/9 regression] strange warning: type qualifiers ignored on cast result type [-Wignored-qualifiers]
Date: Wed, 10 Apr 2019 19:54:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |mpolacek at gcc dot gnu.org
Resolution|--- |WONTFIX
--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Since this seems to work as designed, I'm going to close it.
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Wed, 10 Apr 2019 20:16:00 -0000
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--- Comment #63 from Jürgen Reuter <juergen.reuter at desy dot de> ---
I confirm that the fix in comment #48 works also with MACOSX 10.14.4, XCode
10.2 on gcc trunk, as of r270245.
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Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
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--- Comment #24 from anlauf at gcc dot gnu.org ---
Author: anlauf
Date: Wed Apr 10 20:26:44 2019
New Revision: 270265
URL: https://gcc.gnu.org/viewcvs?rev=270265&root=gcc&view=rev
Log:
2019-04-10 Harald Anlauf <anlauf@gmx.de>
Backport from trunk
PR fortran/89904
* check.c (gfc_check_transfer): Reject procedures as actual
arguments for SOURCE and MOLD of TRANSFER intrinsic.
PR fortran/89904
* gfortran.dg/pr85797.f90: Adjust testcase.
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/check.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/pr85797.f90
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #45 from Steve Ellcey <sje at gcc dot gnu.org> ---
Author: sje
Date: Wed Apr 10 20:28:19 2019
New Revision: 270266
URL: https://gcc.gnu.org/viewcvs?rev=270266&root=gcc&view=rev
Log:
2018-04-10 Steve Ellcey <sellcey@marvell.com>
PR rtl-optimization/87763
* config/aarch64/aarch64-protos.h (aarch64_masks_and_shift_for_bfi_p):
New prototype.
* config/aarch64/aarch64.c (aarch64_masks_and_shift_for_bfi_p):
New function.
* config/aarch64/aarch64.md (*aarch64_bfi<GPI:mode>5_shift):
New instruction.
(*aarch64_bfi<GPI:mode>5_shift_alt): Ditto.
(*aarch64_bfi<GPI:mode>4_noand): Ditto.
(*aarch64_bfi<GPI:mode>4_noand_alt): Ditto.
(*aarch64_bfi<GPI:mode>4_noshift): Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64-protos.h
trunk/gcc/config/aarch64/aarch64.c
trunk/gcc/config/aarch64/aarch64.md
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #46 from Steve Ellcey <sje at gcc dot gnu.org> ---
Author: sje
Date: Wed Apr 10 20:29:57 2019
New Revision: 270267
URL: https://gcc.gnu.org/viewcvs?rev=270267&root=gcc&view=rev
Log:
2018-04-10 Steve Ellcey <sellcey@marvell.com>
PR rtl-optimization/87763
* gcc.target/aarch64/combine_bfxil.c: Change some bfxil checks
to bfi.
* gcc.target/aarch64/combine_bfi_2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/aarch64/combine_bfi_2.c
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89993] Inconsistent incoming stack boundary
Date: Wed, 10 Apr 2019 20:51:00 -0000
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
hjl@gnu-cfl-1 pr89993]$ gcc -mstackrealign -O2 -S b.c
[hjl@gnu-cfl-1 pr89993]$ cat b.s
.file "b.c"
.text
.p2align 4,,15
.globl tst1Foo
.type tst1Foo, @function
tst1Foo:
.LFB526:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-16, %rsp <<<<<<<<<< Align stack without
-mincoming-stack-boundary=4
subq $16, %rsp
movq %rsp, %rcx
call tst2Foo
leave
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE526:
.size tst1Foo, .-tst1Foo
.ident "GCC: (GNU) 8.3.1 20190311 (Red Hat 8.3.1-3)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 pr89993]$
>From gcc-bugs-return-640322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 21:01:34 2019
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From: "yann at droneaud dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Wed, 10 Apr 2019 21:01:00 -0000
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--- Comment #3 from Yann Droneaud <yann at droneaud dot fr> ---
Created attachment 46138
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46138&action=edit
Reduced reproducer sample
I've used creduce[1][2] to generate a smaller reproducer sample, see
https://godbolt.org/z/Ae2x_h
[1] http://embed.cs.utah.edu/creduce/
[2] https://github.com/csmith-project/creduce
>From gcc-bugs-return-640323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 21:02:38 2019
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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
Date: Wed, 10 Apr 2019 21:02:00 -0000
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--- Comment #25 from anlauf at gcc dot gnu.org ---
Author: anlauf
Date: Wed Apr 10 21:02:02 2019
New Revision: 270268
URL: https://gcc.gnu.org/viewcvs?rev=270268&root=gcc&view=rev
Log:
2019-04-10 Harald Anlauf <anlauf@gmx.de>
Backport from trunk
PR fortran/89904
* check.c (gfc_check_transfer): Reject procedures as actual
arguments for SOURCE and MOLD of TRANSFER intrinsic.
PR fortran/89904
* gfortran.dg/pr85797.f90: Adjust testcase.
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/check.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr85797.f90
>From gcc-bugs-return-640324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 21:10:15 2019
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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/89904] [9 regression] ICE in gfortran starting with r270045
Date: Wed, 10 Apr 2019 21:10:00 -0000
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anlauf at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #26 from anlauf at gcc dot gnu.org ---
Should be fixed on trunk, 8-branch and 7-branch.
Closing.
>From gcc-bugs-return-640325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 21:20:39 2019
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Subject: [Bug translation/89939] messages for translation must not contain embedded macro parameters
Date: Wed, 10 Apr 2019 21:20:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tkoenig at gcc dot gnu.org
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
For this case, the solution is straightforward:
Index: frontend-passes.c
===================================================================
--- frontend-passes.c (Revision 270182)
+++ frontend-passes.c (Arbeitskopie)
@@ -3743,13 +3743,16 @@
/* Macros for unified error messages. */
-#define B_ERROR(n) _("Incorrect extent in argument B in MATMUL intrinsic in "
\
- "dimension " #n ": is %ld, should be %ld")
+#define B_ERROR_1 _("Incorrect extent in argument B in MATMUL intrinsic in " \
+ "dimension 1: is %ld, should be %ld")
-#define C_ERROR(n) _("Array bound mismatch for dimension " #n " of array " \
- "(%ld/%ld)")
+#define C_ERROR_1 _("Array bound mismatch for dimension 1 of array " \
+ "(%ld/%ld)")
+#define C_ERROR_2 _("Array bound mismatch for dimension 2 of array " \
+ "(%ld/%ld)")
+
/* Inline assignments of the form c = matmul(a,b).
Handle only the cases currently where b and c are rank-two arrays.
@@ -3976,7 +3979,7 @@
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
- test = runtime_error_ne (b1, a2, B_ERROR(1));
+ test = runtime_error_ne (b1, a2, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -3984,7 +3987,7 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (c1, a1, C_ERROR(1));
+ test = runtime_error_ne (c1, a1, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -3994,7 +3997,7 @@
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (b1, a1, B_ERROR(1));
+ test = runtime_error_ne (b1, a1, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4002,7 +4005,7 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
- test = runtime_error_ne (c1, b2, C_ERROR(1));
+ test = runtime_error_ne (c1, b2, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -4012,7 +4015,7 @@
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
- test = runtime_error_ne (b1, a2, B_ERROR(1));
+ test = runtime_error_ne (b1, a2, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4020,13 +4023,13 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (c1, a1, C_ERROR(1));
+ test = runtime_error_ne (c1, a1, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
c2 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 2);
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
- test = runtime_error_ne (c2, b2, C_ERROR(2));
+ test = runtime_error_ne (c2, b2, C_ERROR_2);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -4037,7 +4040,7 @@
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
/* matrix_b is transposed, hence dimension 1 for the error message.
*/
- test = runtime_error_ne (b2, a2, B_ERROR(1));
+ test = runtime_error_ne (b2, a2, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4045,13 +4048,13 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (c1, a1, C_ERROR(1));
+ test = runtime_error_ne (c1, a1, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
c2 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 2);
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
- test = runtime_error_ne (c2, b1, C_ERROR(2));
+ test = runtime_error_ne (c2, b1, C_ERROR_2);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -4061,7 +4064,7 @@
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (b1, a1, B_ERROR(1));
+ test = runtime_error_ne (b1, a1, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4069,13 +4072,13 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
- test = runtime_error_ne (c1, a2, C_ERROR(1));
+ test = runtime_error_ne (c1, a2, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
c2 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 2);
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
- test = runtime_error_ne (c2, b2, C_ERROR(2));
+ test = runtime_error_ne (c2, b2, C_ERROR_2);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -4478,7 +4481,7 @@
case A2B2:
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
- test = runtime_error_ne (b1, a2, B_ERROR(1));
+ test = runtime_error_ne (b1, a2, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4486,13 +4489,13 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (c1, a1, C_ERROR(1));
+ test = runtime_error_ne (c1, a1, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
c2 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 2);
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
- test = runtime_error_ne (c2, b2, C_ERROR(2));
+ test = runtime_error_ne (c2, b2, C_ERROR_2);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -4503,7 +4506,7 @@
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
/* matrix_b is transposed, hence dimension 1 for the error message.
*/
- test = runtime_error_ne (b2, a2, B_ERROR(1));
+ test = runtime_error_ne (b2, a2, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4511,13 +4514,13 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (c1, a1, C_ERROR(1));
+ test = runtime_error_ne (c1, a1, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
c2 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 2);
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
- test = runtime_error_ne (c2, b1, C_ERROR(2));
+ test = runtime_error_ne (c2, b1, C_ERROR_2);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -4527,7 +4530,7 @@
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (b1, a1, B_ERROR(1));
+ test = runtime_error_ne (b1, a1, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4535,13 +4538,13 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
- test = runtime_error_ne (c1, a2, C_ERROR(1));
+ test = runtime_error_ne (c1, a2, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
c2 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 2);
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
- test = runtime_error_ne (c2, b2, C_ERROR(2));
+ test = runtime_error_ne (c2, b2, C_ERROR_2);
*next_code_point = test;
next_code_point = &test->next;
}
@@ -4550,7 +4553,7 @@
case A2TB2T:
b2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 2);
a1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 1);
- test = runtime_error_ne (b2, a1, B_ERROR(1));
+ test = runtime_error_ne (b2, a1, B_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
@@ -4558,13 +4561,13 @@
{
c1 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 1);
a2 = get_array_inq_function (GFC_ISYM_SIZE, matrix_a, 2);
- test = runtime_error_ne (c1, a2, C_ERROR(1));
+ test = runtime_error_ne (c1, a2, C_ERROR_1);
*next_code_point = test;
next_code_point = &test->next;
c2 = get_array_inq_function (GFC_ISYM_SIZE, expr1, 2);
b1 = get_array_inq_function (GFC_ISYM_SIZE, matrix_b, 1);
- test = runtime_error_ne (c2, b1, C_ERROR(2));
+ test = runtime_error_ne (c2, b1, C_ERROR_2);
*next_code_point = test;
next_code_point = &test->next;
}
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/89939] messages for translation must not contain embedded macro parameters
Date: Wed, 10 Apr 2019 21:23:00 -0000
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--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
Would it be possible to teach exgettext that inside the _(...), the only
allowed tokens are string literals, and maybe the PRIU64 constants? There's
probably some more tokens that I just forgot, but a test run over the GCC
source should reveal most of them.
>From gcc-bugs-return-640327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 21:31:24 2019
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Subject: [Bug translation/90041] New: Command line option without proper quoting in translation message
Date: Wed, 10 Apr 2019 21:31:00 -0000
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Bug ID: 90041
Summary: Command line option without proper quoting in
translation message
Product: gcc
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From rs6000.h:
:%eMissing -mcpu option in ASM_CPU_SPEC?\n} \
I thought there were a linter checking that each option in the translatable
strings is enclosed in %<...%>. Apparently that linter missed this instance.
>From gcc-bugs-return-640328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 10 21:50:56 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/84369] test case gcc.dg/sms-10.c fails on power9
Date: Wed, 10 Apr 2019 21:50:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
power9.md has
(define_insn_reservation "power9-store" 0
whereas pretty much everything else has a non-zero number here. This number
is only for true dependences, so read-after-write, so 0 does not make super
much sense anyway.
Assigning this to Pat. Pat, feel free to kick it back to me, or to whoever
else you want ;-)
>From gcc-bugs-return-640329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 04:16:46 2019
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Subject: [Bug preprocessor/90034] gcc hangs on wait4 after vfork after opening tmp file
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--- Comment #7 from Todd Freed <todd.freed at gmail dot com> ---
Submitted a bug report to bug-bison@gnu.org, as this seems to be a recent
behavior change in bison. It did not used to produce an output which induced
the hang when invoked like,
bison -o /dev/stdout parser.y | gcc -xc -
>From gcc-bugs-return-640330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 05:22:23 2019
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Subject: [Bug c/90042] New: [7.3 regression] Unreadable preprocessed files format
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Bug ID: 90042
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============ the preprocessed file base gcc 7.3
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
3 4
__builtin_sel(
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
vhfInvL2
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
3 4
,
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
vhfInvL2
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
3 4
,
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
vhfSEL16Buff1
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
3 4
,
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
1
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
3 4
)
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
;
============ the preprocessed file base gcc 4.7
# 1570
"/usr1/bmtest/zhongyunde/SAC_C11/SAC/UT/linux_hcc_SD6186/../../CODE/SRS/SAC_SRSMEAS_EQSINR3I.c"
3 4
__builtin_sel( vhfInvL2, vhfInvL2, vhfSEL16Buff1, 1) ;
>From gcc-bugs-return-640331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 06:59:49 2019
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Subject: [Bug preprocessor/90042] [7.3 regression] Unreadable preprocessed files format
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Component|c |preprocessor
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is tracking of the macro expansion. This is done by designed.
This is not a bug.
>From gcc-bugs-return-640332-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 07:07:58 2019
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Subject: [Bug middle-end/90037] [9 Regression] -Wnull-dereference false positive after r269302
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Yann Droneaud <yann at droneaud dot fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46138|0 |1
is obsolete| |
--- Comment #4 from Yann Droneaud <yann at droneaud dot fr> ---
Created attachment 46139
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46139&action=edit
Reduced reproducer sample
(In reply to Yann Droneaud from comment #3)
> Created attachment 46138 [details]
> Reduced reproducer sample
>
> I've used creduce[1][2] to generate a smaller reproducer sample, see
> https://godbolt.org/z/Ae2x_h
>
I've used an improved "interestingness script" to generate a reproducer sample
which trigger less unrelated warnings.
See https://godbolt.org/z/542lS0
>From gcc-bugs-return-640333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 07:08:07 2019
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Subject: [Bug c/90036] [8/9 Regression] false positive: directive argument is null [-Werror=format-overflow=]
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/90037] [9 Regression] -Wnull-dereference false positive after r269302
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
bisection result is mostly a no-op though it is known to cause jump threading
go havoc in another case.
>From gcc-bugs-return-640335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 07:23:01 2019
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Subject: [Bug sanitizer/89832] confusing error message when there is a problem with ASAN_OPTIONS "ERROR: expected '='"
Date: Thu, 11 Apr 2019 07:23:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to qinzhao from comment #6)
> one question to Martin:
> has the proposed patch been committed in gcc9 upstream?
>
> my understanding is the proposed patch is for LLVM source base, not for GCC.
> are you planning to port the patch to gcc9?
Yes, I've proposed the patch and there's no activity at the moment. Once in
LLVM, I can easily cherry pick a commit.
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Subject: [Bug tree-optimization/90018] [7/8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Thu, 11 Apr 2019 07:31:00 -0000
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--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 11 07:30:59 2019
New Revision: 270273
URL: https://gcc.gnu.org/viewcvs?rev=270273&root=gcc&view=rev
Log:
2019-04-11 Richard Biener <rguenther@suse.de>
PR tree-optimization/90018
* tree-vect-data-refs.c (vect_preserves_scalar_order_p):
Test both SLP and interleaving variants.
* gcc.dg/vect/pr90018.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr90018.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
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Subject: [Bug tree-optimization/90018] [7/8/9 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Thu, 11 Apr 2019 07:32:00 -0000
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--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 11 07:31:58 2019
New Revision: 270274
URL: https://gcc.gnu.org/viewcvs?rev=270274&root=gcc&view=rev
Log:
2019-04-11 Richard Biener <rguenther@suse.de>
PR tree-optimization/90018
* tree-vect-data-refs.c (vect_preserves_scalar_order_p):
Test both SLP and interleaving variants.
* gcc.dg/vect/pr90018.c: New testcase.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/pr90018.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-vect-data-refs.c
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Subject: [Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Thu, 11 Apr 2019 07:34:00 -0000
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 11 07:34:20 2019
New Revision: 270275
URL: https://gcc.gnu.org/viewcvs?rev=270275&root=gcc&view=rev
Log:
2019-04-11 Richard Biener <rguenther@suse.de>
PR tree-optimization/90020
* tree-ssa-sccvn.c (vn_reference_may_trap): New function.
* tree-ssa-sccvn.h (vn_reference_may_trap): Declare.
* tree-ssa-pre.c (compute_avail): Use it to not put
possibly trapping references after a call that might not
return into EXP_GEN.
* gcse.c (compute_hash_table_work): Do not elide
marking a block containing a call if the call might not
return.
* gcc.dg/torture/pr90020.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr90020.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gcse.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
trunk/gcc/tree-ssa-sccvn.c
trunk/gcc/tree-ssa-sccvn.h
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Subject: [Bug tree-optimization/90018] [7 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017
Date: Thu, 11 Apr 2019 07:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.3.1
Summary|[7/8/9 Regression] r265453 |[7 Regression] r265453
|miscompiled 527.cam4_r in |miscompiled 527.cam4_r in
|SPEC CPU 2017 |SPEC CPU 2017
--- Comment #21 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk and GCC 8 branch. Queued for backporting.
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Subject: [Bug tree-optimization/90020] [7/8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Thu, 11 Apr 2019 07:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 regression] -O2 -Os |[7/8 regression] -O2 -Os
|x86-64 wrong code generated |x86-64 wrong code generated
|for GNU Emacs |for GNU Emacs
Known to fail|9.0 |
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug c/90043] New: Turn on -Winit-self by default for -Wuninitialized
Date: Thu, 11 Apr 2019 08:08:00 -0000
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Bug ID: 90043
Summary: Turn on -Winit-self by default for -Wuninitialized
Product: gcc
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[ Spinoff bug of PR18017 comment 6. This is an issue that has been debated in
several existing PRs, but I'm filing it here since AFAIK there's not a single
PR with a summary specifying this specific issue. ]
-Winit-self is a warning separate from -Wuninitialized, because there's an
idiom where the init-self pattern is used to silence specific Wuninitialized
warnings, in which case you'd want the -Wuninitialized and -Wno-init-self
combination.
Furthermore, -Winit-self is only active when specified explicitly. In other
words, by default we cater for the "init-self pattern to silence specific
Wuninitialized warnings" scenario.
The proposal is to have -Wuninitialized imply -Winit-self, reversing the
default assumption.
In the new situation, if people want to use the init-self pattern to silence
specific Wuninitialized warnings, they would have to specify -Wno-init-self
explicitly.
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Subject: [Bug c/90043] Turn on -Winit-self by default for -Wuninitialized
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Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #0)
> [ Spinoff bug of PR18017 comment 6.
Original comment:
...
Clang has issued -Wuninitialized in C code regardless of -Winit-self since at
least as far back as 3.0. Intel ICC enables -Wuninitialized in -Wextra (and
has since at least 13.0). Even Visual C issues a diagnostic for the code.
It seems that it might be time for GCC to start diagnosing this as well.
...
>From gcc-bugs-return-640343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:10:38 2019
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Subject: [Bug c/18017] -Winit-self should automatically turn on -Wuninitialized
Date: Thu, 11 Apr 2019 08:10:00 -0000
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Tom de Vries <vries at gcc dot gnu.org> changed:
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CC| |vries at gcc dot gnu.org
--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #6)
> Clang has issued -Wuninitialized in C code regardless of -Winit-self since
> at least as far back as 3.0. Intel ICC enables -Wuninitialized in -Wextra
> (and has since at least 13.0). Even Visual C issues a diagnostic for the
> code.
>
> It seems that it might be time for GCC to start diagnosing this as well.
Filed spinoff bug PR90043 - "Turn on -Winit-self by default for
-Wuninitialized"
>From gcc-bugs-return-640344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:13:03 2019
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90044] New: extraneous setne after asm statement with flag output operands
Date: Thu, 11 Apr 2019 08:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90044
Bug ID: 90044
Summary: extraneous setne after asm statement with flag output
operands
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Created attachment 46140
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46140&action=edit
reduced testcase
For the attached code, gcc -O3 generates (simplified):
$ x86_64-pc-linux-gnu-gcc -O3 tste.c -masm=intel -S -o-
...
foo:
xor eax, eax
# SETNE
setne al
je .L2
xor eax, eax
# TRUE
ret
.L2:
# FALSE
ret
which is way too complex; "setne" is useless there, and it even only modifies
the value 0 already in eax; this one would be better:
foo:
xor eax, eax
# SETNE
je .L2
# TRUE
ret
.L2:
# FALSE
ret
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Subject: [Bug target/81800] [8/9 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/82446] [8/9 Regression] Missed equalities in dr_group_sort_cmp
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-640346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:29:08 2019
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Subject: [Bug testsuite/82006] [8/9 Regression] ERROR: torture-init: torture_without_loops is not empty as expected
Date: Thu, 11 Apr 2019 08:29:00 -0000
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--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Does it still happen (branch/trunk?)? Sorry if I have not been of help :/
The original error is from torture-init in torture-options.exp. torture-init
is called explicitely from gcc.dg/torture/tls/tls.exp and from
gcc-dg.exp in the gcc-dg-runtest procedure but only conditional on
# Some callers set torture options themselves; don't override those.
set existing_torture_options [torture-options-exist]
if { $existing_torture_options == 0 } {
global DG_TORTURE_OPTIONS LTO_TORTURE_OPTIONS
torture-init
that said, somehow one needs to trace the TCL code on how we arrive
with torture options set.
Do you maybe have some local board file setting torture_without_loops?
>From gcc-bugs-return-640348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:30:53 2019
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Subject: [Bug c++/82521] [7/8/9 Regression] No -Wtype-limits warning when using templates
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-640349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:33:00 2019
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Subject: [Bug middle-end/84016] [8/9 Regression] Spec2000 regression around Jan 14 and Jan 19 2018
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm simply closing this bug now. Please always use _separate_ bugreports for
different benchmarks.
>From gcc-bugs-return-640350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:33:01 2019
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Thu, 11 Apr 2019 08:33:00 -0000
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Bug 26163 depends on bug 84016, which changed state.
Bug 84016 Summary: [8/9 Regression] Spec2000 regression around Jan 14 and Jan 19 2018
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84016
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Subject: [Bug other/84613] [meta-bug] SPEC compiler performance issues
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Bug 84613 depends on bug 84016, which changed state.
Bug 84016 Summary: [8/9 Regression] Spec2000 regression around Jan 14 and Jan 19 2018
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84016
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
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>From gcc-bugs-return-640352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:34:18 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/84200] [8/9 Regression] r256888 causes 30% performance regression of 519.lbm_r at -Ofast generic tuning on Zen/9
Date: Thu, 11 Apr 2019 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
deferred. Also needs re-confirmation, but I guess also a WONTFIX is an
appropriate action for this case.
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From: "rainer@emrich-ebersheim.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/82006] [8/9 Regression] ERROR: torture-init: torture_without_loops is not empty as expected
Date: Thu, 11 Apr 2019 08:39:00 -0000
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Rainer Emrich <rainer@emrich-ebersheim.de> changed:
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--- Comment #18 from Rainer Emrich <rainer@emrich-ebersheim.de> ---
(In reply to Richard Biener from comment #17)
> Does it still happen (branch/trunk?)? Sorry if I have not been of help :/
No it doesn't, I completely forgot this PR.
I can't reproduce anymore, so I close this.
>From gcc-bugs-return-640354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:44:44 2019
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Subject: [Bug target/84481] [8/9 Regression] 429.mcf with -O2 regresses by ~6% and ~4%, depending on tuning, on Zen compared to GCC 7.2
Date: Thu, 11 Apr 2019 08:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-11
Ever confirmed|0 |1
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #3)
> Interesting. Do I understand that correctly that it's due to increasing
> addresses of the 3 load instructions: 0x8(%rdx), 0x18(%rdx), 0x30(%rdx) vs.
> 0x18(%rdx) 0x30(%rdx) 0x8(%rdx) ?
I would guess that the hardware prefetcher might be sensitive to this. But
note that depending on the frontend any two of the loads might issue in
parallel.
It seems this is some kind of list-walking so HW prefetching possibly
doesn't (and should not) trigger.
Anyways, it's probably a cache subsystem "issue". Ordering memory
references might be an interesting post-reload scheduling heuristic
we could employ here.
>From gcc-bugs-return-640355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 08:51:59 2019
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Subject: [Bug target/84200] [8/9 Regression] r256888 causes 30% performance regression of 519.lbm_r at -Ofast generic tuning on Zen/9
Date: Thu, 11 Apr 2019 08:51:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
I can't confirm that on a Ryzen 5 machine, it's actually faster on trunk:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=154.477.0&plot.1=65.477.0&plot.2=82.477.0&plot.3=35.477.0&
Out of all configurations, the benchmark is actually faster on trunk than on
GCC-8. Thus I'm closing that.
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Thu, 11 Apr 2019 08:51:00 -0000
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Bug 26163 depends on bug 84200, which changed state.
Bug 84200 Summary: [8/9 Regression] r256888 causes 30% performance regression of 519.lbm_r at -Ofast generic tuning on Zen/9
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84200
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |WONTFIX
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Subject: [Bug target/86952] Avoid jump table for switch statement with -mindirect-branch=thunk
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--- Comment #26 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Apr 11 08:59:48 2019
New Revision: 270277
URL: https://gcc.gnu.org/viewcvs?rev=270277&root=gcc&view=rev
Log:
Backport r269492
2019-04-11 Martin Liska <mliska@suse.cz>
Backport from mainline
2019-03-08 Martin Liska <mliska@suse.cz>
PR target/86952
* config/i386/i386.c (ix86_option_override_internal): Disable
jump tables when retpolines are used.
2019-04-11 Martin Liska <mliska@suse.cz>
Backport from mainline
2019-03-08 Martin Liska <mliska@suse.cz>
PR target/86952
* gcc.target/i386/pr86952.c: New test.
* gcc.target/i386/indirect-thunk-7.c: Use jump tables to match
scanned pattern.
* gcc.target/i386/indirect-thunk-inline-7.c: Likewise.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/pr86952.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/i386/i386.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/indirect-thunk-7.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/indirect-thunk-extern-7.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/indirect-thunk-inline-7.c
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Subject: [Bug rtl-optimization/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 11 09:02:47 2019
New Revision: 270278
URL: https://gcc.gnu.org/viewcvs?rev=270278&root=gcc&view=rev
Log:
PR rtl-optimization/89965
* dce.c (sp_based_mem_offset): New function.
(find_call_stack_args): Use sp_based_mem_offset.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dce.c
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Subject: [Bug target/89096] [7/8/9 regression] AIX 7 linker rejects _<filename>.ro_ sections by default
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not a GCC bug then?
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Subject: [Bug ipa/89584] [9 Regression] CPU2000 degradations with r268448 (172.mgrid -22%, 252.eon -8%)
Date: Thu, 11 Apr 2019 09:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target|powerpc64-unknown-linux-gnu |powerpc64-unknown-linux-gnu
| |, x86_64-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-11
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
A big 252.eon regression can also be seen on Haswell
(https://gcc.opensuse.org/gcc-old/SPEC/CINT/sb-czerny-head-64/252_eon_big.png)
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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Subject: [Bug c++/89875] [7/8/9 Regression] invalid typeof reference to a member of an incomplete struct accepted at function scope
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Subject: [Bug c/89888] [7/8/9 Regression] When switch controlling expression is promoted from type narrower than int, GCC does not diagnose identical cases
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Subject: [Bug middle-end/89970] [8/9 Regression] ICE in dispatch_function_versions, at config/i386/i386.c:32347
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>From gcc-bugs-return-640365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:31:12 2019
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Subject: [Bug rtl-optimization/90007] [9 Regression] ICE in extract_constrain_insn_cached, at recog.c:2223
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
The problem of sel-sched propagating hard-regs is likely older, thus P2 since
this is also not from a real-world program that newly fails to build.
>From gcc-bugs-return-640366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:33:05 2019
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Subject: [Bug other/55930] [7/8/9 Regression] libatomic build failure if configured with --disable-dependency-tracking
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>From gcc-bugs-return-640367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:37:21 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #47 from Richard Biener <rguenth at gcc dot gnu.org> ---
What's the state of regressions left? Can we xfail the rest and defer the bug?
>From gcc-bugs-return-640368-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:38:45 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can we xfail/defer the bug?
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #64 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Why is this a [9 Regression] BTW? If the failure is while compiling
darwin-driver.c and caused by system headers using _Atomic even in C++, when
gcc/config/darwin-driver.c is identical between 8.x and 9.x (except for
copyright year in a comment), I don't understand how gcc 9 could fail to build
with XCode 10.2 while gcc 8.3 would succeed.
>From gcc-bugs-return-640370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:43:34 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Thu, 11 Apr 2019 09:43:00 -0000
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--- Comment #38 from Richard Biener <rguenth at gcc dot gnu.org> ---
Isn't the issue also latent on all branches?
>From gcc-bugs-return-640371-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:44:31 2019
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Subject: [Bug target/89271] [9 Regression] gcc.target/powerpc/vsx-simode2.c stopped working in GCC 9
Date: Thu, 11 Apr 2019 09:44:00 -0000
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--- Comment #18 from Richard Biener <rguenth at gcc dot gnu.org> ---
Status update?
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Subject: [Bug middle-end/89288] ICE in tree_code_size, at tree.c:865
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P1 |P3
Target Milestone|9.0 |---
Summary|[9 Regression] ICE in |ICE in tree_code_size, at
|tree_code_size, at |tree.c:865
|tree.c:865 |
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, we don't seem to get consensus here. I also don't see how this is
a regression, my GCC 8 compiler doesn't know __builtin_has_attribute.
So, removing the regression marker.
Can we, for GCC 9, simply say
sorry ("unsupported argument to __builtin_has_attribute");
instead of ICEing and/or extending the specification in some ways?
For reference, GCC 8 says
t.c:1:22: warning: implicit declaration of function ‘__builtin_has_attribute’;
did you mean ‘__builtin_va_start’? [-Wimplicit-function-declaration]
typedef int Assert [(__builtin_has_attribute (1, target("sse")) == 1)];
^~~~~~~~~~~~~~~~~~~~~~~
__builtin_va_start
t.c:1:50: warning: implicit declaration of function ‘target’
[-Wimplicit-function-declaration]
typedef int Assert [(__builtin_has_attribute (1, target("sse")) == 1)];
^~~~~~
t.c:1:13: error: variably modified ‘Assert’ at file scope
typedef int Assert [(__builtin_has_attribute (1, target("sse")) == 1)];
^~~~~~
>From gcc-bugs-return-640373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:52:00 2019
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
ice-on-invalid/error-recovery is P4.
>From gcc-bugs-return-640374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 09:55:41 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #39 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #38)
> Isn't the issue also latent on all branches?
It is, but we have been lucky that the RA didn't decide to emit that.
On the trunk (unless something changed in RA since end of January) it
unfortunately results in real issues, so we really can't ship GCC 9 with that.
(In reply to Bernd Edlinger from comment #37)
> If a non-general-regs-only function is called from here,
> it will only preserve d8-d15, and the call-clobbered registers
> d0-d7 would of course be modified.
> But is that a problem at all, if the call-clobbered registers are not
> restored?
I'm afraid I don't understand enough why the floating registers can't be used
in the personality routine and other unwinder routines. I'd think that even in
the
personality routine itself the d8-d15 registers if they are used will be
saved/restored first, so if that wasn't working, I'd say any use of those
registers in the personality routine and anything it calls are problematic
(and, note, not just C++ personality routine, we have also libgcc/unwind-c.c
with C personality routine (also changed in the patch) and perhaps personality
routines for other languages; I see e.g. libobjc/exception.c or
gcc/ada/raise-gcc.c not patched though, and libphobos/libdruntime/gcc/deh.d),
but perhaps it only cares about the personality routine itself and not on what
it calls. This needs to be clarified.
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
It's ICE on valid too, unfortunately.
>From gcc-bugs-return-640376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:12:18 2019
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Subject: [Bug libstdc++/88264] Support glibc-style tunables for <memory_resource>
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-11
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The emergency EH pool size should be tunable too.
From libsupc++/eh_alloc.cc:
// Allocate the arena - we could add a GLIBCXX_EH_ARENA_SIZE environment
// to make this tunable.
arena_size = (EMERGENCY_OBJ_SIZE * EMERGENCY_OBJ_COUNT
+ EMERGENCY_OBJ_COUNT * sizeof
(__cxa_dependent_exception));
arena = (char *)malloc (arena_size);
>From gcc-bugs-return-640377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:28:38 2019
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC|paolo.carlini at oracle dot com |
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--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
>From gcc-bugs-return-640378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:44:22 2019
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Subject: [Bug rtl-optimization/90026] [8/9 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)
Date: Thu, 11 Apr 2019 10:44:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46141
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46141&action=edit
gcc9-pr90026.patch
Untested fix.
>From gcc-bugs-return-640379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:50:31 2019
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Subject: [Bug c++/82521] [7/8/9 Regression] No -Wtype-limits warning when using templates
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
IIRC this was done intentionally, to avoid warnings for code like x < 0 where
decltype(x) might be unsigned in some specializations of the template. But for
that to work we only need to disable the warning for dependent expressions.
>From gcc-bugs-return-640380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:51:12 2019
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Subject: [Bug target/89399] [7/8 Regression] ICE: RTL check: expected code 'set', 'clobber' or 'clobber_high', have 'parallel' in combine_reaching_defs, at ree.c:783
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not P1. When did it work? Is it even a regression?
>From gcc-bugs-return-640381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:52:38 2019
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Subject: [Bug translation/89939] messages for translation must not contain embedded macro parameters
Date: Thu, 11 Apr 2019 10:52:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Roland Illig from comment #3)
> Would it be possible to teach exgettext that inside the _(...), the only
> allowed tokens are string literals, and maybe the PRIU64 constants? There's
> probably some more tokens that I just forgot, but a test run over the GCC
> source should reveal most of them.
I'm afraid not, exgettext is just a wrapper around xgettext and all this
handling is done in xgettext, so we'd need to change gettext package (perhaps
add some new option).
In the https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00335.html thread David
Malcolm suggested that we could handle some of these issues (e.g. "something"
"somethingelse" or "something "
" something else"
etc. by a new gcc non-default -Wformat= warning, perhaps it could cover this
case as well, but it wouldn't handle the G_("...") cases unless the compiler
sees those arguments to format attribute functions. In any case, that is GCC
10 material.
(In reply to Thomas Koenig from comment #2)
> For this case, the solution is straightforward:
>
> Index: frontend-passes.c
LGTM; I'd like to submit the 20190414 snapshot to the translation project,
could you please make sure this fix is committed before Sunday? Thanks.
>From gcc-bugs-return-640382-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:54:10 2019
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Subject: [Bug target/89399] [7/8 Regression] ICE: RTL check: expected code 'set', 'clobber' or 'clobber_high', have 'parallel' in combine_reaching_defs, at ree.c:783
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #8)
> When did it work? Is it even a regression?
Before r206418.
>From gcc-bugs-return-640383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 10:56:44 2019
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Subject: [Bug target/90016] aarch64: reference to undeclared N in help for command line option
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--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Author: clyon
Date: Thu Apr 11 10:56:08 2019
New Revision: 270280
URL: https://gcc.gnu.org/viewcvs?rev=270280&root=gcc&view=rev
Log:
[aarch64] PR90016 - aarch64: reference to undeclared N in help for command line
option
2019-04-11 Christophe Lyon <christophe.lyon@linaro.org>
PR target/90016
* config/aarch64/aarch64.opt (msve-vector-bits): Add missing final '.'.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.opt
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Subject: [Bug regression/81331] [7 Regression] missed Eh delivery in partitioned function
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P1 |P2
Status|NEW |ASSIGNED
Known to work| |8.0
Assignee|unassigned at gcc dot gnu.org |hubicka at gcc dot gnu.org
Known to fail| |7.1.0
--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
This can't be P1. But we're still waiting for a backport from Honza.
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Subject: [Bug rtl-optimization/83530] [7 Regression] ICE in reset_sched_cycles_in_current_ebb, at sel-sched.c:7150
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can't be P1.
>From gcc-bugs-return-640386-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:06:10 2019
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Subject: [Bug translation/90041] Command line option without proper quoting in translation message
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CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We don't have any linter. The previous changes were done by grepping stuff
AFAIK.
>From gcc-bugs-return-640387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:24:57 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90045] New: [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Thu, 11 Apr 2019 11:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90045
Bug ID: 90045
Summary: [9 Regression] fails to build a rx-elf cross toolchain
with C++ enabled
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
[ 88s] + ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++ --disable-werror
--with-gxx-include-dir=/usr/include/c++/9 --enable-ssp --disable-libssp
--disable-libvtv --disable-cet --disable-libcc1 --disable-plugin
--with-bugurl=https://bugs.opensuse.org/ '--with-pkgversion=SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new
--disable-libstdcxx-pch --enable-version-specific-runtime-libs
--with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex
--enable-gnu-indirect-function --program-suffix=-9 --program-prefix=rx-elf-
--target=rx-elf --disable-nls --with-sysroot=/usr/rx-elf/sys-root
--with-build-sysroot=/usr/rx-elf/sys-root
--with-build-time-tools=/usr/rx-elf/bin --with-newlib --build=x86_64-suse-linux
--host=x86_64-suse-linux
...
[ 1779s] libtool: compile:
/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x8
6_64-suse-linux/./gcc/xgcc -shared-libgcc
-B/home/abuild/rpmbuild/BUILD/gcc-9.0.
1+r270275/obj-x86_64-suse-linux/./gcc -nostdinc++
-L/home/abuild/rpmbuild/BUILD/
gcc-9.0.1+r270275/obj-x86_64-suse-linux/rx-elf/libstdc++-v3/src
-L/home/abuild/r
pmbuild/BUILD/gcc-9.0.1+r270275/obj-x86_64-suse-linux/rx-elf/libstdc++-v3/src/.l
ibs
-L/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x86_64-suse-linux/rx-elf
/libstdc++-v3/libsupc++/.libs -B/usr/rx-elf/bin/ -B/usr/rx-elf/lib/ -isystem
/us
r/rx-elf/include -isystem /usr/rx-elf/sys-include
--sysroot=/usr/rx-elf/sys-root
-I/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/libstdc++-v3/../libgcc
-I/home/
abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x86_64-suse-linux/rx-elf/libstdc++-v
3/include/rx-elf
-I/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x86_64-suse
-linux/rx-elf/libstdc++-v3/include
-I/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r2702
75/libstdc++-v3/libsupc++ -std=gnu++98 -fno-implicit-templates -Wall -Wextra
-Ww
rite-strings -Wcast-qual -Wabi=2 -fdiagnostics-show-location=once
-frandom-seed=
valarray.lo -g -O2 -c ../../../../../libstdc++-v3/src/c++98/valarray.cc -o
valar
ray.o
[ 1779s] /tmp/cceTRmfA.s: Assembler messages:
[ 1779s] /tmp/cceTRmfA.s: Fatal error: Infinite loop encountered whilst
attempti
ng to compute the addresses of symbols in section
.text._ZSt15__valarray_copyImEvPKT_mPS0_
[ 1779s] make[5]: *** [Makefile:646: valarray.lo] Error 1
>From gcc-bugs-return-640388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:25:15 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Thu, 11 Apr 2019 11:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90045
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Target| |rx-elf
Priority|P3 |P4
Host| |x86_64-suse-linux
Target Milestone|--- |9.0
>From gcc-bugs-return-640389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:26:53 2019
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Subject: [Bug libstdc++/90046] New: [9 Regression] fails to build a epiphany-elf cross toolchain with C++ enabled
Date: Thu, 11 Apr 2019 11:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90046
Bug ID: 90046
Summary: [9 Regression] fails to build a epiphany-elf cross
toolchain with C++ enabled
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
[ 87s] + ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++ --disable-werror
--with-gxx-include-dir=/usr/include/c++/9 --enable-ssp --disable-libssp
--disable-libvtv --disable-cet --disable-libcc1 --disable-plugin
--with-bugurl=https://bugs.opensuse.org/ '--with-pkgversion=SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new
--disable-libstdcxx-pch --enable-version-specific-runtime-libs
--with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex
--enable-gnu-indirect-function --program-suffix=-9
--program-prefix=epiphany-elf- --target=epiphany-elf --disable-nls
--with-sysroot=/usr/epiphany-elf/sys-root
--with-build-sysroot=/usr/epiphany-elf/sys-root
--with-build-time-tools=/usr/epiphany-elf/bin --with-newlib
--build=x86_64-suse-linux --host=x86_64-suse-linux
...
[ 1411s] libtool: compile:
/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x8
6_64-suse-linux/./gcc/xgcc -shared-libgcc
-B/home/abuild/rpmbuild/BUILD/gcc-9.0.
1+r270275/obj-x86_64-suse-linux/./gcc -nostdinc++
-L/home/abuild/rpmbuild/BUILD/
gcc-9.0.1+r270275/obj-x86_64-suse-linux/epiphany-elf/libstdc++-v3/src
-L/home/ab
uild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x86_64-suse-linux/epiphany-elf/libstdc
++-v3/src/.libs
-L/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x86_64-suse-
linux/epiphany-elf/libstdc++-v3/libsupc++/.libs -B/usr/epiphany-elf/bin/
-B/usr/
epiphany-elf/lib/ -isystem /usr/epiphany-elf/include -isystem
/usr/epiphany-elf/
sys-include --sysroot=/usr/epiphany-elf/sys-root
-I/home/abuild/rpmbuild/BUILD/g
cc-9.0.1+r270275/libstdc++-v3/../libgcc
-I/home/abuild/rpmbuild/BUILD/gcc-9.0.1+
r270275/obj-x86_64-suse-linux/epiphany-elf/libstdc++-v3/include/epiphany-elf
-I/
home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/obj-x86_64-suse-linux/epiphany-elf/libstdc++-v3/include
-I/home/abuild/rpmbuild/BUILD/gcc-9.0.1+r270275/libstdc++-v3/libsupc++
-std=gnu++17 -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual
-Wabi=2 -fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=memory_resource.lo -fimplicit-templates -g -O2 -c
../../../../../libstdc++-v3/src/c++17/memory_resource.cc -o memory_resource.o
[ 1413s] ../../../../../libstdc++-v3/src/c++17/memory_resource.cc: In member
fun
ction 'void std::pmr::monotonic_buffer_resource::_M_new_buffer(std::size_t,
std:
:size_t)':
[ 1413s] ../../../../../libstdc++-v3/src/c++17/memory_resource.cc:235:62:
error:
static assertion failed
[ 1413s] 235 | static_assert(alignof(monotonic_buffer_resource::_Chunk)
==
1);
[ 1413s] |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
~~
[ 1414s] make[5]: *** [Makefile:569: memory_resource.lo] Error 1
[ 1414s] make[5]: *** Waiting for unfinished jobs....
>From gcc-bugs-return-640390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:27:46 2019
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/89693] [9 Regression] ICE: verify_cgraph_node failed (error: edge points to wrong declaration)
Date: Thu, 11 Apr 2019 11:27:00 -0000
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--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The verifier is checking that all redirections look sane (as one made by our
IPA optimizers). As number of IPA tranforms grows this gets harder to track.
Perhaps we can just drop the check now. I do not remember it noticing real bug
recently (it was useful to check somewhat subtle way tree-inlie updates
callgraph edges after cloning or inlining, but that code should be pretty
stable now).
Alternatively we can of course add a flag "redirected" and disable all the
checks for edges which we know that was updated (as we already do for
icf_merged), but I am not sure this is worth the effort.
>From gcc-bugs-return-640391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:37:47 2019
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 11 Apr 2019 11:37:00 -0000
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--- Comment #65 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Jakub Jelinek from comment #64)
> Why is this a [9 Regression] BTW? If the failure is while compiling
> darwin-driver.c and caused by system headers using _Atomic even in C++, when
> gcc/config/darwin-driver.c is identical between 8.x and 9.x (except for
> copyright year in a comment), I don't understand how gcc 9 could fail to
> build with XCode 10.2 while gcc 8.3 would succeed.
Sorry, Jakub, when I first stumbled over the problem I thought that this was
triggered by a change in the gcc trunk, until I realized it was a change in the
XCode/system code. Indeed, it is not a regression.
>From gcc-bugs-return-640392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:44:29 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86259] [8 Regression] min(4, strlen(s)) optimized to strlen(s) with -flto
Date: Thu, 11 Apr 2019 11:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Last reconfirmed|2018-06-21 00:00:00 |2019-4-11
Known to work| |9.0
Assignee|rguenth at gcc dot gnu.org |unassigned at gcc dot gnu.org
Summary|[8/9 Regression] min(4, |[8 Regression] min(4,
|strlen(s)) optimized to |strlen(s)) optimized to
|strlen(s) with -flto |strlen(s) with -flto
--- Comment #36 from Richard Biener <rguenth at gcc dot gnu.org> ---
Reconfirmed on the branch. Not sure what rev. fixed it on the trunk. Not
working on this.
>From gcc-bugs-return-640393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:46:55 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/86590] Codegen is poor when passing std::string by value with _GLIBCXX_EXTERN_TEMPLATE undefined
Date: Thu, 11 Apr 2019 11:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-640394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:48:42 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90046] [9 Regression] fails to build a epiphany-elf cross toolchain with C++ enabled
Date: Thu, 11 Apr 2019 11:48:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-640395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 11:59:43 2019
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87554] [8/9 Regression] internal compiler error: in record_reference, at cgraphbuild.c:64
Date: Thu, 11 Apr 2019 11:59:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The constructor indeed looks broken to me: it should not have naked var_decl.
So I am changing component to C++
>From gcc-bugs-return-640396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:10:59 2019
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Subject: [Bug tree-optimization/86259] [8 Regression] min(4, strlen(s)) optimized to strlen(s) with -flto
Date: Thu, 11 Apr 2019 12:10:00 -0000
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--- Comment #37 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk in r262522.
>From gcc-bugs-return-640397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:15:05 2019
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From: "harriethijssen65 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90047] New: internal compiler error: in finish_expr_stmt, at cp/semantics.c:680
Date: Thu, 11 Apr 2019 12:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90047
Bug ID: 90047
Summary: internal compiler error: in finish_expr_stmt, at
cp/semantics.c:680
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
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Created attachment 46142
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46142&action=edit
temporary compile file from COLIRU
Hit the above error with included code.
Interesting fact is that when commenting out struct Message_t (not required in
test code) does not generate this error. It is seemingly unrelated, but causes
the compiler to complain when this code is present.
Please do not comment on the semantics: the code is "dumbed down" to minimum
lines for clarity.
Thanks.
Code:
// This file can be also found using the Coliru command line: cat
/Archive2/56/3d8a97d31a1950/main.cpp
#include <iostream>
#include <cstring>
template<typename T, char const* TAG>
struct STR {
static constexpr const char* tag = TAG;
STR() {memset(&v, 0, sizeof(v));}
STR(T value) {operatorAssign(value);}
template <class U, std::enable_if_t<!std::is_array<T>::value>* = nullptr>
T& operatorAssign(const T& rhs) {return v; }
T v;
};
typedef
class Message {
public:
enum severity_t {} ;
friend std::ostream& operator<< (std::ostream& os, const Message& message)
{os << message._severity << ": ";return os;}
severity_t _severity;
std::string _message;
} Message_t;
extern char const ctag1[] = "tag1";
int main() {
STR<char[10], ctag1> c1;
c1 = (char*)"abcdefghij";
}
>From gcc-bugs-return-640398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:16:41 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90047] internal compiler error: in finish_expr_stmt, at cp/semantics.c:680
Date: Thu, 11 Apr 2019 12:16:00 -0000
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--- Comment #1 from Harrie Thijssen <harriethijssen65 at gmail dot com> ---
Apologies: Message_t is a "typedef", not a "struct" as mentioned earlier
>From gcc-bugs-return-640399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:17:40 2019
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81800] [8/9 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
Date: Thu, 11 Apr 2019 12:17:00 -0000
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--- Comment #14 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #13)
> Patches should be pinged after a week if they aren't reviewed, furthermore,
> it is better to CC explicitly relevant maintainers.
I've got about 10 patches waiting, I'll ping after stage 1 opens.
>From gcc-bugs-return-640404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:21:11 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/66974] -Warray-bounds false positive with -O3
Date: Thu, 11 Apr 2019 12:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66974
Bug 66974 depends on bug 83202, which changed state.
Bug 83202 Summary: Try joining operations on consecutive array elements during tree vectorization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-640403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:21:10 2019
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Subject: [Bug middle-end/82286] [7 Regression] Wrong array subscript is above array bounds
Date: Thu, 11 Apr 2019 12:21:00 -0000
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Bug 82286 depends on bug 83202, which changed state.
Bug 83202 Summary: Try joining operations on consecutive array elements during tree vectorization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/69224] [7 Regression] -Warray-bounds false positive with -O3 and struct pointer parameter
Date: Thu, 11 Apr 2019 12:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69224
Bug 69224 depends on bug 83202, which changed state.
Bug 83202 Summary: Try joining operations on consecutive array elements during tree vectorization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202
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>From gcc-bugs-return-640401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:21:07 2019
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
Date: Thu, 11 Apr 2019 12:21:00 -0000
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Bug 53947 depends on bug 83202, which changed state.
Bug 83202 Summary: Try joining operations on consecutive array elements during tree vectorization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202
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>From gcc-bugs-return-640400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:21:05 2019
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Subject: [Bug tree-optimization/83202] Try joining operations on consecutive array elements during tree vectorization
Date: Thu, 11 Apr 2019 12:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
The comment#4 case is sth completely different. If it's really interesting
to re-vectorize already vectorized code please file a different bug.
The other testcases seem to work fine for me now.
>From gcc-bugs-return-640405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:22:06 2019
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Subject: [Bug target/81800] [8/9 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
Date: Thu, 11 Apr 2019 12:22:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Wilco from comment #14)
> (In reply to Jakub Jelinek from comment #13)
> > Patches should be pinged after a week if they aren't reviewed, furthermore,
> > it is better to CC explicitly relevant maintainers.
>
> I've got about 10 patches waiting, I'll ping after stage 1 opens.
This PR is marked as 8/9 Regression though, therefore it should be resolved if
possible already for GCC 9 and maybe even for GCC 8.4 too.
>From gcc-bugs-return-640406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:23:34 2019
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Subject: [Bug libstdc++/21609] array_allocator vs rebind & templated constructor
Date: Thu, 11 Apr 2019 12:23:00 -0000
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--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I will remove this extension completely for GCC 10.
>From gcc-bugs-return-640407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:26:29 2019
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Thu, 11 Apr 2019 12:26:00 -0000
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--- Comment #52 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed? Or shall we take it as recurring bug?
>From gcc-bugs-return-640408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 12:36:36 2019
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/81800] [8/9 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
Date: Thu, 11 Apr 2019 12:36:00 -0000
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--- Comment #16 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #15)
> (In reply to Wilco from comment #14)
> > (In reply to Jakub Jelinek from comment #13)
> > > Patches should be pinged after a week if they aren't reviewed, furthermore,
> > > it is better to CC explicitly relevant maintainers.
> >
> > I've got about 10 patches waiting, I'll ping after stage 1 opens.
>
> This PR is marked as 8/9 Regression though, therefore it should be resolved
> if possible already for GCC 9 and maybe even for GCC 8.4 too.
It's a minor issue. I can't see how it could be more important than serious
code generation bugs (eg. setjmp/longjmp) that affect many GCC versions and
targets.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90041] Command line option without proper quoting in translation message
Date: Thu, 11 Apr 2019 12:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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Last reconfirmed| |2019-04-11
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, we have one.
But the problem is that actually the %e or %n strings in the specs are not
gcc-internal-format, they are printed using:
case 'e':
/* %efoo means report an error with `foo' as error message
and don't execute any more commands for this file. */
{
const char *q = p;
char *buf;
while (*p != 0 && *p != '\n')
p++;
buf = (char *) alloca (p - q + 1);
strncpy (buf, q, p - q);
buf[p - q] = 0;
error ("%s", _(buf));
return -1;
}
break;
case 'n':
/* %nfoo means report a notice with `foo' on stderr. */
{
const char *q = p;
char *buf;
while (*p != 0 && *p != '\n')
p++;
buf = (char *) alloca (p - q + 1);
strncpy (buf, q, p - q);
buf[p - q] = 0;
inform (UNKNOWN_LOCATION, "%s", _(buf));
if (*p)
p++;
}
break;
and so no % is recognized in those strings at all. Furthermore, po/exgettext
just marks all those untranslatable if they contain any % characters:
if (index(msgid, "%") != 0) continue
Not really sure if we want to change the spec handling incompatibly at this
point (allow %<, %>, %', %% in there, start using them and tweak the above so
that it is error (buf) or inform (buf). As the spec file is something that can
be overridden by the user, if we do such a change, it might be safer to verify
the strings that they only contain the argument-less gcc-internal-format %
format specifiers, because otherwise one could just use gcc -specs=myspecs
and there have somewhere {whatever:%ecrash me%I%G%s%s} and get an ICE from the
compiler or driver.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90041
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Unlike the specs, the *.opt stuff is always only compiled into the compiler and
already processed using gcc-internal-format, so I've submitted
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00437.html to deal properly with
those.
>From gcc-bugs-return-640411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:03:28 2019
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Subject: [Bug target/89271] [9 Regression] gcc.target/powerpc/vsx-simode2.c stopped working in GCC 9
Date: Thu, 11 Apr 2019 13:03:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |wschmidt at gcc dot gnu.org
--- Comment #19 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Looking at gcc-testresults, looks like we currently fail the test with
FAIL: gcc.target/powerpc/vsx-simode2.c scan-assembler mtvsrwz
for P7 BE, P8 LE, and P9 LE using current trunk. Alan and Segher, do we know
more about this yet?
>From gcc-bugs-return-640412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:06:39 2019
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Subject: [Bug tree-optimization/57359] store motion causes wrong code for union access at -O3
Date: Thu, 11 Apr 2019 13:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57359
--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
We'd need to peel the last iteration as the following shows. This also means
it is not enough to prove the loop actually iterates. Peeling the last
iteration means we have to be able to identify that iteration. Alternatively,
we might be able to re-issue all stores from the last iteration up until
the exit on the exit edge though if there are conditional stores on this
path this might prove interesting.
There's always the option to not apply store-motion here of course.
extern void abort();
typedef int A;
typedef float B;
void __attribute__((noinline,noclone))
foo(A *p, B *q, long unk)
{
for (long i = 0; i < unk; ++i) {
*p = 1;
q[i] = 42;
}
}
int main(void)
{
char *mem = __builtin_malloc (sizeof (A) * 5);
foo((A *)mem + 4, (B *)mem, 5);
if (*((B *)mem + 4) != 42) abort();
return 0;
}
>From gcc-bugs-return-640413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:17:22 2019
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Subject: [Bug tree-optimization/82282] PRE cannot blindly fold integer-to-pointer/pointer-to-integer round-trips
Date: Thu, 11 Apr 2019 13:17:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Depends on|82177 |65752
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think elsewhere I noted that propagating an equivalency is likely what makes
those cases appear. In this cases it would be phiopt. Still not doing that
would have some bad effects on optimization.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65752
[Bug 65752] Too strong optimizations int -> pointer casts
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82177
[Bug 82177] Alias analysis too aggressive with integer-to-pointer cast
>From gcc-bugs-return-640414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:19:39 2019
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Subject: [Bug debug/82202] Missing debug information in LTO/offload compilation
Date: Thu, 11 Apr 2019 13:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Just noticed this recently again - we need explict -g at link-time to get
debuginfo for an LTO compilation. IMHO that's a serious issue people might
run into (now that we handle optimization transparently).
>From gcc-bugs-return-640416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:20:53 2019
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Subject: [Bug fortran/90048] Fortran OpenACC 'private' clause rejected for implicitly private loop iteration variable
Date: Thu, 11 Apr 2019 13:20:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Ever confirmed|0 |1
>From gcc-bugs-return-640415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:20:31 2019
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Subject: [Bug fortran/90048] New: Fortran OpenACC 'private' clause rejected for implicitly private loop iteration variable
Date: Thu, 11 Apr 2019 13:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90048
Bug ID: 90048
Summary: Fortran OpenACC 'private' clause rejected for
implicitly private loop iteration variable
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: openacc, rejects-valid
Severity: normal
Priority: P3
Component: fortran
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Reporter: tschwinge at gcc dot gnu.org
Target Milestone: ---
... as reported in <https://gcc.gnu.org/ml/gcc-patches/2017-01/msg02164.html>,
later re-posted in <https://gcc.gnu.org/ml/gcc-patches/2018-08/msg00531.html>.
>From gcc-bugs-return-640417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:21:03 2019
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Subject: [Bug c/82186] [7 Regression] ICE (segfault), VLA type with inlining
Date: Thu, 11 Apr 2019 13:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'd say backporting is good. Queued.
>From gcc-bugs-return-640419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:22:54 2019
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/85051] [7/8/9 Regression] ICE: in edge_badness, at ipa-inline.c:1035 with flattening recursive calls
Date: Thu, 11 Apr 2019 13:22:00 -0000
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--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The problem is that flattening forgets to update global info.
I am testing the following fix
Index: ipa-inline.c
===================================================================
--- ipa-inline.c (revision 270280)
+++ ipa-inline.c (working copy)
@@ -2134,7 +2134,7 @@ inline_small_functions (void)
at IPA inlining time. */
static void
-flatten_function (struct cgraph_node *node, bool early)
+flatten_function (struct cgraph_node *node, bool early, bool update)
{
struct cgraph_edge *e;
@@ -2164,7 +2164,7 @@ flatten_function (struct cgraph_node *no
it in order to fully flatten the leaves. */
if (!e->inline_failed)
{
- flatten_function (callee, early);
+ flatten_function (callee, early, false);
continue;
}
@@ -2204,14 +2204,15 @@ flatten_function (struct cgraph_node *no
inline_call (e, true, NULL, NULL, false);
if (e->callee != orig_callee)
orig_callee->aux = (void *) node;
- flatten_function (e->callee, early);
+ flatten_function (e->callee, early, false);
if (e->callee != orig_callee)
orig_callee->aux = NULL;
}
node->aux = NULL;
- if (!node->global.inlined_to)
- ipa_update_overall_fn_summary (node);
+ if (update)
+ ipa_update_overall_fn_summary (node->global.inlined_to
+ ? node->global.inlined_to : node);
}
/* Inline NODE to all callers. Worker for cgraph_for_node_and_aliases.
@@ -2519,7 +2520,7 @@ ipa_inline (void)
function. */
if (dump_file)
fprintf (dump_file, "Flattening %s\n", node->name ());
- flatten_function (node, false);
+ flatten_function (node, false, true);
}
if (j < nnodes - 2)
@@ -2782,7 +2783,7 @@ early_inliner (function *fun)
if (dump_enabled_p ())
dump_printf (MSG_OPTIMIZED_LOCATIONS,
"Flattening %C\n", node);
- flatten_function (node, true);
+ flatten_function (node, true, true);
inlined = true;
}
else
>From gcc-bugs-return-640418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:22:52 2019
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Subject: [Bug tree-optimization/82187] missed PRE at -O3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2017-09-12 00:00:00 |2019-4-11
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Reconfirmed.
>From gcc-bugs-return-640420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:25:12 2019
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Subject: [Bug lto/89358] [7/8/9 Regression] Combining -std=c++14 and -std=c++17 objects gives ODR warnings
Date: Thu, 11 Apr 2019 13:25:00 -0000
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--- Comment #13 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I am testing the following:
Index: ipa-devirt.c
===================================================================
--- ipa-devirt.c (revision 270280)
+++ ipa-devirt.c (working copy)
@@ -1282,6 +1282,22 @@ warn_types_mismatch (tree t1, tree t2, l
inform (loc_t2, "the incompatible type is defined here");
}
+static bool
+skip_in_fields_list_p (tree t)
+{
+ if (TREE_CODE (t) != FIELD_DECL)
+ return true;
+ /* C++ FE itroduces zero sized fields depending on -mstd setting, see
+ PR89358. */
+ if (DECL_SIZE (t)
+ && integer_zerop (DECL_SIZE (t))
+ && DECL_ARTIFICIAL (t)
+ && DECL_IGNORED_P (t)
+ && !DECL_NAME (t))
+ return true;
+ return false;
+}
+
/* Compare T1 and T2, report ODR violations if WARN is true and set
WARNED to true if anything is reported. Return true if types match.
If true is returned, the types are also compatible in the sense of
@@ -1547,10 +1563,9 @@ odr_types_equivalent_p (tree t1, tree t2
f1 || f2;
f1 = TREE_CHAIN (f1), f2 = TREE_CHAIN (f2))
{
- /* Skip non-fields. */
- while (f1 && TREE_CODE (f1) != FIELD_DECL)
+ while (f1 && skip_in_fields_list_p (f1))
f1 = TREE_CHAIN (f1);
- while (f2 && TREE_CODE (f2) != FIELD_DECL)
+ while (f2 && skip_in_fields_list_p (f2))
f2 = TREE_CHAIN (f2);
if (!f1 || !f2)
break;
>From gcc-bugs-return-640421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:25:14 2019
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Subject: [Bug target/81941] Rejects intrinsic use
Date: Thu, 11 Apr 2019 13:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-11
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Reconfirmed.
>From gcc-bugs-return-640422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:28:26 2019
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Subject: [Bug lto/87525] [7/8/9 Regression] infinite loop generated for fread() if enabling -flto and -D_FORTIFY_SOURCE=2
Date: Thu, 11 Apr 2019 13:28:00 -0000
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--- Comment #27 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Well, we can't throw away all extern inlines as that would penalize C++
performance quite a lot (it is ipa-inliner that decides on inlining of most of
keyed methods).
The real fix is to special case GNU extern inlines and avoid merging of them
which needs support for a symbol with multiple definitions (so a symbol can be
both syntactic alias and function definition) and then handle it right
everywhere in the IPA optimization queue (make IPA optimizers to understand
that every copy may have different semantics but it is still interchangeable
for the offline variant). I have patches for that but the first part of this,
but it is definitly for next stage1.
>From gcc-bugs-return-640423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:29:20 2019
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Subject: [Bug lto/89358] [7/8/9 Regression] Combining -std=c++14 and -std=c++17 objects gives ODR warnings
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #13)
> I am testing the following:
> Index: ipa-devirt.c
> ===================================================================
> --- ipa-devirt.c (revision 270280)
> +++ ipa-devirt.c (working copy)
> @@ -1282,6 +1282,22 @@ warn_types_mismatch (tree t1, tree t2, l
> inform (loc_t2, "the incompatible type is defined here");
> }
>
> +static bool
> +skip_in_fields_list_p (tree t)
> +{
> + if (TREE_CODE (t) != FIELD_DECL)
> + return true;
> + /* C++ FE itroduces zero sized fields depending on -mstd setting, see
s/-mstd/-std=/
Otherwise it looks right to me.
>From gcc-bugs-return-640424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:31:31 2019
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Subject: [Bug c/89946] [8/9 Regression] ICE in assemble_start_function, at varasm.c:1871
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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>From gcc-bugs-return-640425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:35:52 2019
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From: "wangtao42 at huawei dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90049] New: Wrong expanding for a unsigned short ssa_name in embedded assembly code.
Date: Thu, 11 Apr 2019 13:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90049
Bug ID: 90049
Summary: Wrong expanding for a unsigned short ssa_name in
embedded assembly code.
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: wangtao42 at huawei dot com
Target Milestone: ---
Created attachment 46143
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46143&action=edit
testcase
A unsigned short ssa_name in embedded assembly code will be expanded to
subreg:HI, and without the bit extracting action. It will result in a wrong
assembly code.
The attachment is the testcase, and the command is as follows:
mips-sde-elf-gcc -O2 -S t2.c
And the result assembly code is:
func:
.frame $sp,0,$31 # vars= 0, regs= 0/0, args= 0, gp= 0
.mask 0x00000000,0
.fmask 0x00000000,0
lw $3,0($4)
lw $2,%gp_rel(g_b)($28)
srl $4,$3,24
sw $3,%gp_rel(g_a)($28)
ext $6,$2,0,17
sltu $7,$4,1
#APP
# 27 "t2.c" 1
addiu $5, $6, 0
movn $5, $3, $7
# 0 "" 2
#NO_APP
ins $2,$5,0,17
.set noreorder
.set nomacro
jr $31
sw $2,%gp_rel(g_b)($28)
It is wrong that the $3 is loaded a word from 0($4), and the $3 should be the
low 16bit of 0($4). I guess something wrong with expand_gimple_basic_block, and
this ignore should not be used in embedded assembly code:
5822 def_p = SINGLE_SSA_DEF_OPERAND (stmt, SSA_OP_DEF);
5823
5824 if (def_p != NULL)
5825 {
5826 /* Ignore this stmt if it is in the list of
5827 replaceable expressions. */
5828 if (SA.values
5829 && bitmap_bit_p (SA.values,
5830 SSA_NAME_VERSION (DEF_FROM_PTR
(def_p))))
5831 continue;
5832 }
5833 last = expand_gimple_stmt (stmt);
Please help to check this.
Thanks
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Subject: [Bug rtl-optimization/90049] Wrong expanding for a unsigned short ssa_name in embedded assembly code.
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--- Comment #1 from Tao Wang <wangtao42 at huawei dot com> ---
I also checked this in arm64 and arm32 backend, and it can be reproduced also.
>From gcc-bugs-return-640427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:40:16 2019
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Subject: [Bug lto/87525] [7/8/9 Regression] infinite loop generated for fread() if enabling -flto and -D_FORTIFY_SOURCE=2
Date: Thu, 11 Apr 2019 13:40:00 -0000
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--- Comment #28 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
and forgot to mention, one variant would be to
1) document that gnu_inline artifical always_inline is special and may have
different semantics than offline function but it is also the only case
2) throw them away after early inlining.
My undrestanding of Jakub comment #16 is that probably we do not want to go
this route. This would be relatively easy to implement. On the same time I
think GCC9 should be quite safe for fortify source with what we have so far.
I will work on the support for multiple definitions of one function. My
original motivation was to support differnt variant of C++ comdats so different
optimization flags do not prevent us from inlining. My initial tests however
shown that I do need to teach inliner heuristics how to correctly calculate
unit size in this case as it happens suprisingly often for Firefox.
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Subject: [Bug lto/70929] [7/8/9 regression] Cross-module inlining for functions having argument passed by reference is no longer working.
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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CC| |mjambor at suse dot cz
--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Since we now stream parameter types into ipa-fnsummary, we should be able to
resolve this precisely?
>From gcc-bugs-return-640429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 13:56:32 2019
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Subject: [Bug target/89096] [7/8/9 regression] AIX 7 linker rejects _<filename>.ro_ sections by default
Date: Thu, 11 Apr 2019 13:56:00 -0000
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--- Comment #12 from David Edelsohn <dje at gcc dot gnu.org> ---
There was a separately reported problem of _<filename>.rw_ in the text section.
This was due to read_only_private_data_section. I have a patch proposed for
that.
_<filename>.ro_ should be part of the .text section. I don't see why it would
contain relocations.
Whoever wrote the AIX support for CMake did a very poor job and apparently
didn't try to understand the semantics of AIX. It's sad that the CMake
maintainers accepted such a broken patch.
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Subject: [Bug testsuite/81179] gcc.dg/vect/pr65947-9.c and gcc.dg/vect/pr65947-14.c fail starting with r249553
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug c/89946] [8/9 Regression] ICE in assemble_start_function, at varasm.c:1871
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46144
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46144&action=edit
gcc9-pr89946.patch
Untested fix.
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Subject: [Bug libstdc++/90050] New: std::filesystem::path segfault in destructor
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Bug ID: 90050
Summary: std::filesystem::path segfault in destructor
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#include <filesystem>
int main() {
std::filesystem::path p = "foo";
}
g++ -g --std=c++17 path.cpp
./a.out
Segmentation fault (core dumped)
g++ --version
g++ (Ubuntu 8.3.0-6ubuntu1) 8.3.0
uname -a
Linux x2 5.0.6-050006-generic #201904030534 SMP Wed Apr 3 05:36:14 UTC 2019
x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 19.04.
Core was generated by `./a.out'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000055c2ac25149b in std::vector<std::filesystem::__cxx11::path::_Cmpt,
std::allocator<std::filesystem::__cxx11::path::_Cmpt> >::~vector (this=0x23,
__in_chrg=<optimized out>) at /usr/include/c++/8/bits/stl_vector.h:567
567 std::_Destroy(this->_M_impl._M_start, this->_M_impl._M_finish,
(gdb) bt
#0 0x000055c2ac25149b in std::vector<std::filesystem::__cxx11::path::_Cmpt,
std::allocator<std::filesystem::__cxx11::path::_Cmpt> >::~vector (this=0x23,
__in_chrg=<optimized out>) at /usr/include/c++/8/bits/stl_vector.h:567
#1 0x000055c2ac251314 in std::filesystem::__cxx11::path::~path (this=0x3,
__in_chrg=<optimized out>) at /usr/include/c++/8/bits/fs_path.h:208
#2 0x000055c2ac251f5c in std::filesystem::__cxx11::path::_Cmpt::~_Cmpt
(this=0x3, __in_chrg=<optimized out>) at /usr/include/c++/8/bits/fs_path.h:643
#3 0x000055c2ac251f77 in std::_Destroy<std::filesystem::__cxx11::path::_Cmpt>
(__pointer=0x3) at /usr/include/c++/8/bits/stl_construct.h:98
#4 0x000055c2ac251e27 in
std::_Destroy_aux<false>::__destroy<std::filesystem::__cxx11::path::_Cmpt*>
(__first=0x3, __last=0x0) at /usr/include/c++/8/bits/stl_construct.h:108
#5 0x000055c2ac251a98 in std::_Destroy<std::filesystem::__cxx11::path::_Cmpt*>
(__first=0x3, __last=0x0) at /usr/include/c++/8/bits/stl_construct.h:137
#6 0x000055c2ac2517a9 in std::_Destroy<std::filesystem::__cxx11::path::_Cmpt*,
std::filesystem::__cxx11::path::_Cmpt> (__first=0x3, __last=0x0) at
/usr/include/c++/8/bits/stl_construct.h:206
#7 0x000055c2ac2514b1 in std::vector<std::filesystem::__cxx11::path::_Cmpt,
std::allocator<std::filesystem::__cxx11::path::_Cmpt> >::~vector
(this=0x7ffe3ad201d0, __in_chrg=<optimized out>)
at /usr/include/c++/8/bits/stl_vector.h:567
#8 0x000055c2ac251314 in std::filesystem::__cxx11::path::~path
(this=0x7ffe3ad201b0, __in_chrg=<optimized out>) at
/usr/include/c++/8/bits/fs_path.h:208
#9 0x000055c2ac251230 in main () at path.cpp:4
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Subject: [Bug lto/89358] [7/8/9 Regression] Combining -std=c++14 and -std=c++17 objects gives ODR warnings
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--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
and s/itroduces/introduces/
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Subject: [Bug rtl-optimization/56069] [7 Regression] RA pessimization
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vfdff <zhongyunde at huawei dot com> changed:
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----------------------------------------------------------------------------
CC| |zhongyunde at huawei dot com
--- Comment #20 from vfdff <zhongyunde at huawei dot com> ---
>
> Preferred/alternative class is misleading here. It is not used anywhere in
> IRA/LRA for allocation decision (but may be it is used by reload -- i don't
> remember). It is only used as a temporary result for allocno class
> calculation.
>
In the newest GCC 9.x , Does the Preferred/alternative class still not used in
LRA ?
>From gcc-bugs-return-640435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 14:21:58 2019
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Subject: [Bug ada/90051] New: Error in spec comments - g-caliio.ads (%Z)
Date: Thu, 11 Apr 2019 14:21:00 -0000
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The spec GNAT.Calendar.Time_IO, states that a picture_field with an option of
"%c", will produce the following:
"Sat Nov 04 12:02:33 EST 1989"
The EST part is supposed to be expanded with %Z.
However, the body does not support %Z and so the timezone is never shown.
The relevant part from the body is:
when 'c' =>
case Padding is
when Zero =>
Result := Result & Image (Date, "%a %b %d %T %Y");
when Space =>
Result := Result & Image (Date, "%a %b %_d %_T %Y");
when None =>
Result := Result & Image (Date, "%a %b %-d %-T %Y");
end case;
As you can see, no %Z, nor is it anywhere else in the file.
The easiest fix would be to remove "EST" from the comment, however, I would
prefer that the %Z field is supported.
>From gcc-bugs-return-640436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 14:23:40 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Thu, 11 Apr 2019 14:23:00 -0000
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--- Comment #40 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Not that I invented this, but as far as I understand,
normally the interrupted execution context registers are saved on a
register file in memory. But not on ARM.
On arm only the core registers are saved on a register file,
and the non-core, VFP registers are only saved when needed.
When the unwinder needs to restore a VFP register it is
done in _Unwind_VRS_Pop, and when in phase 1 this function
does save the current VFP register bank and does modify the
live VFP registers. Only when core registers are modified that
operates on the register file.
Therefore only the functions that invoke __gnu_unwind_execute
directly or indirectly must not save & restore any non-core registers
in the prologue and epilogue.
When function that saves & restores the d8-d15 but does clobber
d0-d7, that could cause those registers to be different than what
they would be otherwise.
It is possible that _Unwind_VRS_Pop could restore also call-clobbered
registers d0-d7, but I don't know if those registers would
actually need to be restored to their previous state.
>From gcc-bugs-return-640437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 14:31:03 2019
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Subject: [Bug c++/90052] New: No -Wtautological-compare warning for (x == 1 && x == 2)
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Bug ID: 90052
Summary: No -Wtautological-compare warning for (x == 1 && x ==
2)
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G++ doesn't warn about:
int f(int x)
{
if (x == 1 && x == 2)
return x;
if (x != 1 || x != 2)
return x;
return 0;
}
Clang warns with -Wtautological-compare (but not -Wall -Wextra):
taut.cc:5:14: warning: overlapping comparisons always evaluate to true
[-Wtautological-overlap-compare]
if (x != 1 || x != 2)
~~~~~~~^~~~~~~~~
taut.cc:3:14: warning: overlapping comparisons always evaluate to false
[-Wtautological-overlap-compare]
if (x == 1 && x == 2)
~~~~~~~^~~~~~~~~
2 warnings generated.
It's easy to accidentally write && when you mean || or vice versa, so the
warning is useful.
>From gcc-bugs-return-640438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 14:31:18 2019
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Subject: [Bug c++/90052] No -Wtautological-compare warning for (x == 1 && x == 2)
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Invalid, I needed -Wlogical-op
>From gcc-bugs-return-640439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 14:44:30 2019
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Subject: [Bug c++/77796] tautological compare warning emitted for inherited static method comparisons
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #2)
> (In reply to Eric Gallager from comment #1)
> > Confirmed. Also, it seems weird that the warning underlines all of
> > B::destroy, but only the "A" in A::destroy:
> >
> > $ /usr/local/bin/g++ -c -Wall -Wextra -pedantic 77796.cc
> > 77796.cc:11:12: warning: self-comparison always evaluates to true
> > [-Wtautological-compare]
> > B::destroy == A::destroy ? 0 : 1
> > ~~~~~~~~~~~^~~~
> > $
>
> Diagnostics maintainers, do you know what's up with that?
That was PR 87386, fixed on trunk.
>From gcc-bugs-return-640440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 14:54:51 2019
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Subject: [Bug middle-end/88576] -fno-math-errno causes GCC to consider that malloc does not set errno
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--- Comment #15 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Zack Weinberg from comment #14)
> I don't see why it would _ever_ make sense for -fno-alloc-errno to default
> to the setting of -fno-math-errno. The math functions and the memory
> allocation functions are independent components of the C library. Each
> toggle's default should be settable independently by the target
> configuration.
true, good point
>From gcc-bugs-return-640441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 14:58:09 2019
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Subject: [Bug c/89933] [7/8/9 Regression] ICE in merge_decls, at c/c-decl.c:2517
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46145
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46145&action=edit
gcc9-pr89933.patch
Untested fix. The code added in r234626 aka PR70297 fix assumes that the type
is not its main variant, which is the case here. If we wanted to remove the
main variant from its variant list, we'd need to adjust all the variants in the
list (if any) to some other main variant. I'd think just changing the
TYPE_NAME is better in this case, usually there won't be any variants in that
case and the remove type won't be referenced from anywhere, but if it is, we
won't ICE because it refers to ggc_freed TYPE_DECL.
>From gcc-bugs-return-640442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 15:03:55 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #48 from Steve Ellcey <sje at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #47)
> What's the state of regressions left? Can we xfail the rest and defer the
> bug?
I submitted a patch to fix gcc.target/aarch64/lsl_asr_sbfiz.c
That email is https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00404.html
The other regressions I have are:
FAIL: gcc.target/aarch64/insv_1.c scan-assembler bfi\tx[0-9]+, x[0-9]+, 0, 8
FAIL: gcc.target/aarch64/insv_1.c scan-assembler bfi\tx[0-9]+, x[0-9]+, 16, 5
FAIL: gcc.target/aarch64/insv_1.c scan-assembler movk\tx[0-9]+, 0x1d6b, lsl 32
I don't have a patch for those.
>From gcc-bugs-return-640444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 15:16:47 2019
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Subject: [Bug ipa/89693] [9 Regression] ICE: verify_cgraph_node failed (error: edge points to wrong declaration)
Date: Thu, 11 Apr 2019 15:16:00 -0000
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--- Comment #5 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I have proposed a patch (keeping the verifier, at least for now) on the mailing
list:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00445.html
>From gcc-bugs-return-640443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 15:16:14 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
Date: Thu, 11 Apr 2019 15:16:00 -0000
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--- Comment #49 from Jeffrey A. Law <law at redhat dot com> ---
I think the insv_1 (and it's closely related insv_2) regressions can be fixed
by a single ior/and pattern in the backend or by hacking up combine a bit. I'm
still playing with the latter, but may have to put it on the back burner
because of the pain of note management :( Hoping to draw a conclusion on that
by the end of this week. If I can't get a clean combine solution, then my
recommendation would be to build the suitable backend pattern. It just has to
match stuff like
(set (reg1) (ior (and (reg2) ...)) with a matching constraint on reg1 and reg2
to ensure it's a RMW operand.
>From gcc-bugs-return-640445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 15:26:50 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #41 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Jakub Jelinek from comment #39)
> (and, note, not just C++ personality routine, we have also libgcc/unwind-c.c
> with C personality routine (also changed in the patch) and perhaps
> personality routines for other languages; I see e.g. libobjc/exception.c or
> gcc/ada/raise-gcc.c not patched though, and
> libphobos/libdruntime/gcc/deh.d), but perhaps it only cares about the
> personality routine itself and not on what it calls. This needs to be
> clarified.
Yes you are absolutely right about objC, Ada, and D.
At the very least the personality routine, and all functions
that are calling __gnu_unwind_frame need that pragma.
in obj-C it is a macro CONTINUE_UNWINDING, that is fine.
In ada it is continue_unwind a function, that calls __gnu_unwind_frame,
and personality_body calling continue_unwind,
and the personality function itself.
In D it is CONTINUE_UNWINDING, a function.
scanLSDA, __gdc_personality, and gdc_personality itself.
>From gcc-bugs-return-640446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 15:28:54 2019
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Subject: [Bug translation/90035] Non-translatable C++ parser diagnostics
Date: Thu, 11 Apr 2019 15:28:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 11 15:28:18 2019
New Revision: 270286
URL: https://gcc.gnu.org/viewcvs?rev=270286&root=gcc&view=rev
Log:
PR translation/90035
* parser.h (struct cp_parser): Add
type_definition_forbidden_message_arg member.
* parser.c (cp_debug_parser): Print it.
(cp_parser_check_type_definition): Pass
parser->type_definition_forbidden_message_arg as second argument to
error.
(cp_parser_has_attribute_expression, cp_parser_sizeof_operand): Set
parser->type_definition_forbidden_message_arg and use G_() with
%qs for parser->type_definition_forbidden_message instead of
building untranslatable message using concat.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/cp/parser.h
>From gcc-bugs-return-640447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 15:38:12 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #42 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Thanks for the explanation.
In that case, I think it would be better to just add
__attribute__((target("general-regs-only")))
to the
#ifdef __ARM_EABI_UNWINDER__
_Unwind_Reason_Code
PERSONALITY_FUNCTION (_Unwind_State, struct _Unwind_Exception *,
struct _Unwind_Context *);
decl in unwind-c.c and similarly for eh_personality.cc and to other personality
routines that use CONTINUE_UNWINDING as well (plus to unwind-arm.c and
pr-support.c using pragma for everything).
>From gcc-bugs-return-640448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 16:01:52 2019
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Subject: [Bug c++/90047] [8/9 Regression] internal compiler error: in finish_expr_stmt, at cp/semantics.c:680
Date: Thu, 11 Apr 2019 16:01:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-11
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |8.4
Summary|internal compiler error: in |[8/9 Regression] internal
|finish_expr_stmt, at |compiler error: in
|cp/semantics.c:680 |finish_expr_stmt, at
| |cp/semantics.c:680
Ever confirmed|0 |1
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Seems to have started with r251438.
>From gcc-bugs-return-640449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 16:17:58 2019
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Subject: [Bug c++/90052] Warning for (x == 1 && x == 2) should be in -Wall
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |NEW
Last reconfirmed| |2019-04-11
Resolution|INVALID |---
Summary|No -Wtautological-compare |Warning for (x == 1 && x ==
|warning for (x == 1 && x == |2) should be in -Wall
|2) |
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reopening, as these warnings seem appropriate for -Wall
>From gcc-bugs-return-640450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 16:19:28 2019
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Subject: [Bug libstdc++/90046] [9 Regression] fails to build a epiphany-elf cross toolchain with C++ enabled
Date: Thu, 11 Apr 2019 16:19:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can't even figure out how to configure for this target:
checking stdbool.h usability... no
checking stdbool.h presence... yes
configure: WARNING: stdbool.h: present but cannot be compiled
configure: WARNING: stdbool.h: check for missing prerequisite headers?
configure: WARNING: stdbool.h: see the Autoconf documentation
configure: WARNING: stdbool.h: section "Present But Cannot Be Compiled"
configure: WARNING: stdbool.h: proceeding with the compiler's result
checking for stdbool.h... no
checking stdalign.h usability... no
checking stdalign.h presence... yes
configure: WARNING: stdalign.h: present but cannot be compiled
configure: WARNING: stdalign.h: check for missing prerequisite headers?
configure: WARNING: stdalign.h: see the Autoconf documentation
configure: WARNING: stdalign.h: section "Present But Cannot Be Compiled"
configure: WARNING: stdalign.h: proceeding with the compiler's result
checking for stdalign.h... no
checking for the value of EOF... configure: error: computing EOF failed
make: *** [Makefile:10842: configure-target-libstdc++-v3] Error 1
>From gcc-bugs-return-640451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 16:22:27 2019
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Subject: [Bug libstdc++/90046] [9 Regression] fails to build a epiphany-elf cross toolchain with C++ enabled
Date: Thu, 11 Apr 2019 16:22:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Target Milestone|--- |9.0
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Doh, got it. I can reproduce the error. Patch coming soon ...
>From gcc-bugs-return-640452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 16:56:44 2019
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Subject: [Bug c++/90047] [8/9 Regression] internal compiler error: in finish_expr_stmt, at cp/semantics.c:680
Date: Thu, 11 Apr 2019 16:56:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
template <int a> struct b { static constexpr int c = a; };
template <typename> struct aa;
template <typename...> struct d;
template <typename e, typename f, typename g, typename... h>
struct d<e, f, g, h...> : aa<e>::i {};
template <typename> struct j;
template <typename k, long l> struct j<k[l]> : b<true> {};
struct m {
typedef b<0> i;
};
template <typename> struct n : m::i {};
template <bool> struct o;
template <typename p> struct aa { typedef p i; };
template <bool ab> using ac = typename o<ab>::i;
class q {
template <typename k, typename> using ad = ac<d<n<k>, int, int>::c>;
template <typename k, typename = ad<k, void>> q(k &);
};
template <typename r> struct s {
s(r) { t; }
template <ac<!j<r>::c> *> void t();
};
class I {
friend char operator<<(char p1, I p2) { return p1 << p2; }
q ag;
};
int main() { s<char[10]> a = (char *)""; }
>From gcc-bugs-return-640453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 17:18:11 2019
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Subject: [Bug rtl-optimization/90049] Wrong expanding for a unsigned short ssa_name in embedded assembly code.
Date: Thu, 11 Apr 2019 17:18:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-11
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
The 6.x series of compilers is no longer supported. Please try with a newer
version, preferably the latest release (GCC 8.3).
>From gcc-bugs-return-640454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 18:03:23 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #50 from Steve Ellcey <sje at gcc dot gnu.org> ---
Author: sje
Date: Thu Apr 11 18:02:41 2019
New Revision: 270288
URL: https://gcc.gnu.org/viewcvs?rev=270288&root=gcc&view=rev
Log:
2018-04-11 Steve Ellcey <sellcey@marvell.com>
PR rtl-optimization/87763
* config/aarch64/aarch64.md (*aarch64_bfi<GPI:mode>4_noshift_alt):
New Instruction.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.md
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #51 from Steve Ellcey <sje at gcc dot gnu.org> ---
Author: sje
Date: Thu Apr 11 18:03:49 2019
New Revision: 270289
URL: https://gcc.gnu.org/viewcvs?rev=270289&root=gcc&view=rev
Log:
2018-04-11 Steve Ellcey <sellcey@marvell.com>
PR rtl-optimization/87763
* gcc.target/aarch64/combine_bfxil.c: Change some bfxil checks
to bfi.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c
>From gcc-bugs-return-640456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 18:08:34 2019
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Subject: [Bug target/89271] [9 Regression] gcc.target/powerpc/vsx-simode2.c stopped working in GCC 9
Date: Thu, 11 Apr 2019 18:08:00 -0000
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--- Comment #20 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I currently get (on BE; the testcase forces -mcpu=power8):
std 3,-16(1)
addi 9,1,-12
lxsiwzx 32,0,9
#APP
# 10 "vsx-simode2.c" 1
xxlor 32,32,32 # v, v constraints
# 0 "" 2
#NO_APP
mfvsrwz 3,32
blr
so yes this test _should_ fail, we do the wrong thing. NO_REGS is
chosen for this reg class, no vector class is considered.
>From gcc-bugs-return-640457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 19:21:37 2019
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Subject: [Bug c++/87603] [C++17] noexcept isn't special cased for constant expressions anymore
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
>From gcc-bugs-return-640458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 19:28:02 2019
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Subject: [Bug c++/82521] [7/8/9 Regression] No -Wtype-limits warning when using templates
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--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
If revision r124856 really caused this, the effect was not intentional.
I actually don't see anything in the patch that should change this aspect, so I
would not be surprised if it was caused by some other change.
>From gcc-bugs-return-640459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 19:33:54 2019
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Subject: [Bug c++/82081] Tail call optimisation of noexcept function leads to exception allowed through
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Thiago Macieira from comment #0)
> 1) forbid tail-call optimisation of a noexcept(false) call in a noexcept
> function, so that there is a frame in place for the unwinder to find.
This seems like the necessary solution. Exception specifications should be
enforced in the callee, and tail-call optimization is breaking that.
>From gcc-bugs-return-640460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 19:36:22 2019
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Subject: [Bug c++/82521] [7/8/9 Regression] No -Wtype-limits warning when using templates
Date: Thu, 11 Apr 2019 19:36:00 -0000
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--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #4)
> I actually don't see anything in the patch that should change this aspect,
> so I would not be surprised if it was caused by some other change.
I looked at the range that you pointed out and indeed, r124856 seems the most
likely. So it has to be the change in cvt.c but I cannot understand what is
wrong it.
>From gcc-bugs-return-640462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 19:58:54 2019
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Subject: [Bug libstdc++/90046] [9 Regression] fails to build a epiphany-elf cross toolchain with C++ enabled
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Apr 11 19:58:14 2019
New Revision: 270291
URL: https://gcc.gnu.org/viewcvs?rev=270291&root=gcc&view=rev
Log:
PR libstdc++/90046 fix build failure on epiphany-elf
The epiphany-elf target aligns structs to 8 bytes, which causes the
static_assert(alignof(_Chunk) == 1) to fail.
Instead of requiring _Chunks to be positionable at any alignment, ensure
new buffers are aligned to alignof(_Chunk). Because the buffer size is a
power of two, we know that both the buffer size and sizeof(_Chunk) are
multiples of alignof(_Chunk). So is p is aligned to alignof(_Chunk) then
so is (p + size - sizeof(_Chunk)). So just ensure the new buffer is
aligned to at least alignof(_Chunk), which should already be true
because the caller requests at least alignof(max_align_t).
PR libstdc++/90046
* src/c++17/memory_resource.cc
(monotonic_buffer_resource::_Chunk::allocate): Increase alignment if
needed to allow placing a _Chunk at the end of the buffer.
(monotonic_buffer_resource::_M_new_buffer): Remove static_assert.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/c++17/memory_resource.cc
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed
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Subject: [Bug translation/90035] Non-translatable C++ parser diagnostics
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug translation/89939] messages for translation must not contain embedded macro parameters
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Apr 11 20:14:27 2019
New Revision: 270292
URL: https://gcc.gnu.org/viewcvs?rev=270292&root=gcc&view=rev
Log:
2019-04-11 Thomas Koenig <tkoenig@gcc.gnu.org>
PR translation/89939
* frontend-passes.c (B_ERROR): Delete macro.
(C_ERROR): Delete macro.
(B_ERROR_1): New macro.
(C_ERROR_1): New macro.
(C_ERROR_2): New macro.
(inline_matmul_assign): Use new macros.
(call_external_blas): Likewise.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk, closing.
>From gcc-bugs-return-640466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 20:33:52 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 11 Apr 2019 20:33:00 -0000
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--- Comment #14 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #12)
> Disposition:
> 0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
> 5:r116 l0 4 4:r117 l0 0
>
> If r116 had been allocated hard reg 0 all would be fine (and we know r116
> dies in insn 7 already, there is a REG_DEAD note on it).
What was the order of assignment? If r116 conflicts with r111 or r117 and they
were assigned first, then that's just bad luck.
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Thu, 11 Apr 2019 21:27:00 -0000
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--- Comment #43 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
does anybody know what is the Ada and/or D syntax for that?
>From gcc-bugs-return-640468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 21:41:49 2019
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Subject: [Bug c++/87603] [C++17] noexcept isn't special cased for constant expressions anymore
Date: Thu, 11 Apr 2019 21:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87603
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |patch
--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00466.html
>From gcc-bugs-return-640469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 22:04:28 2019
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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90017] gcc generates wrong debug information at -O3
Date: Thu, 11 Apr 2019 22:04:00 -0000
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--- Comment #2 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
This odd behavior is an artifact of the way GCC lays out the basic blocks, and
how GDB interprets the line number program.
The blocks containing the conditional calls to optimize_me_not in line 15 are
moved to the end of the function, in reverse order, while the rest of the inner
loop, with code from lines 12 to 14, remains in sequential order.
What GDB sees then is a long chunk of code all at line 15, the first of which
corresponds to the iteration l=8. l=7 is later, with another line number mark,
then l=6 and so on, but without intervening line number changes, it takes it
all as a single line. GDB pays no attention to the is_stmt=1 markers at each
and every one of them, let alone to the different view numbers.
So, yeah, definitely consumer issue.
>From gcc-bugs-return-640470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 22:12:45 2019
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From: "qrzhang at gatech dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90017] gcc generates wrong debug information at -O3
Date: Thu, 11 Apr 2019 22:12:00 -0000
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--- Comment #3 from Qirun Zhang <qrzhang at gatech dot edu> ---
(In reply to Alexandre Oliva from comment #2)
> This odd behavior is an artifact of the way GCC lays out the basic blocks,
> and how GDB interprets the line number program.
>
> The blocks containing the conditional calls to optimize_me_not in line 15
> are moved to the end of the function, in reverse order, while the rest of
> the inner loop, with code from lines 12 to 14, remains in sequential order.
>
> What GDB sees then is a long chunk of code all at line 15, the first of
> which corresponds to the iteration l=8. l=7 is later, with another line
> number mark, then l=6 and so on, but without intervening line number
> changes, it takes it all as a single line. GDB pays no attention to the
> is_stmt=1 markers at each and every one of them, let alone to the different
> view numbers.
>
> So, yeah, definitely consumer issue.
Hi Alex,
Are you suggesting that it's a gdb bug? Perhaps, I can report it to gdb
instead? Thanks.
>From gcc-bugs-return-640471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 22:44:48 2019
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Subject: [Bug target/89271] [9 Regression] gcc.target/powerpc/vsx-simode2.c stopped working in GCC 9
Date: Thu, 11 Apr 2019 22:44:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
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--- Comment #21 from Alan Modra <amodra at gmail dot com> ---
The patch I have to fix this bug is too intrusive for gcc-9, and I haven't
tried to find some other hack (likely would be dangerous too). Marking as a
P3.
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Subject: [Bug rtl-optimization/88730] [8 Regression] gcc generates wrong debug information at -Og
Date: Thu, 11 Apr 2019 22:48:00 -0000
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--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
In both GCC 9.0.1 20190404 (experimental) and GCC 8.3.1 20190223 (Red Hat
8.3.1-2) I get <optimized out> for j outside the innermost loop. Does anyone
still observe the problem in GCC8 or elsewhere?
>From gcc-bugs-return-640473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 23:35:44 2019
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Subject: [Bug target/88055] ICE in extract_insn, at recog.c:2305 on ppc64le
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I have a patch.
>From gcc-bugs-return-640474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 11 23:41:26 2019
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Subject: [Bug debug/89454] gcc generates wrong debug information at -Og
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
ccp drops the conditional assignment, and then cfgcleanup drops the forwarder
blocks and the test. Fixed by the patch for PR89892.
*** This bug has been marked as a duplicate of bug 89892 ***
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Subject: [Bug debug/82738] [meta-bug] issues with the -Og optimization level
Date: Thu, 11 Apr 2019 23:41:00 -0000
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Bug 82738 depends on bug 89454, which changed state.
Bug 89454 Summary: gcc generates wrong debug information at -Og
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89454
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Subject: [Bug debug/89892] gcc generates wrong debug information at -O2
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--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
*** Bug 89454 has been marked as a duplicate of this bug. ***
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #15 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Forming thread by copy 0:a0r111-a4r117 (freq=500):
Result (freq=3500): a0r111(2500) a4r117(1000)
Forming thread by copy 2:a3r112-a5r116 (freq=125):
Result (freq=4500): a3r112(1500) a5r116(3000)
Forming thread by copy 1:a2r114-a3r112 (freq=62):
Result (freq=5500): a2r114(1000) a3r112(1500) a5r116(3000)
Pushing a1(r113,l0)(cost 0)
Pushing a4(r117,l0)(cost 0)
Pushing a0(r111,l0)(cost 0)
Pushing a2(r114,l0)(cost 0)
Pushing a3(r112,l0)(cost 0)
Pushing a5(r116,l0)(cost 0)
Popping a5(r116,l0) -- assign reg 3
Popping a3(r112,l0) -- assign reg 4
Popping a2(r114,l0) -- assign reg 3
Popping a0(r111,l0) -- assign reg 0
Popping a4(r117,l0) -- assign reg 0
Popping a1(r113,l0) -- assign reg 2
Assigning 4 to a5r116
Disposition:
0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
5:r116 l0 4 4:r117 l0 0
r116 does not conflict with *any* other pseudo. It is alive in the first
two insns of the function, which are
(insn 50 3 7 2 (set (reg:SI 116)
(reg:SI 0 r0 [ a ])) "ira-shrinkwrap-prep-1.c":14:1 181
{*arm_movsi_insn}
(nil))
(insn 7 50 8 2 (parallel [
(set (reg:CC 100 cc)
(compare:CC (reg:SI 116)
(const_int 0 [0])))
(set (reg/v:SI 112 [ a ])
(reg:SI 116))
]) "ira-shrinkwrap-prep-1.c":17:6 188 {*movsi_compare0}
(expr_list:REG_DEAD (reg:SI 116)
(nil)))
r0 _is_ used by a successor (as the argument for the call to foo), but we
could use r0 for r116 anyway, since what we assign to it is r0 :-)
>From gcc-bugs-return-640478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 01:10:49 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Fri, 12 Apr 2019 01:10:00 -0000
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--- Comment #16 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(Which would make insn 50 go away, if you prefer to look at it that way).
>From gcc-bugs-return-640479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 01:16:33 2019
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Subject: [Bug rtl-optimization/90049] Wrong expanding for a unsigned short ssa_name in embedded assembly code.
Date: Fri, 12 Apr 2019 01:16:00 -0000
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--- Comment #3 from Tao Wang <wangtao42 at huawei dot com> ---
(In reply to Eric Botcazou from comment #2)
> The 6.x series of compilers is no longer supported. Please try with a newer
> version, preferably the latest release (GCC 8.3).
Hi Eric,
I tried with gcc-7.3.0, gcc-8.3.0, and even the lastest version on trunk
branch, but this problem is also existed.
Thanks,
Tao Wangtao
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Subject: [Bug tree-optimization/82017] missing strlen optimization for chained mempcpy calls
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Who's the maintainer for this area of the compiler? Besides you, that is.
>From gcc-bugs-return-640481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 04:49:41 2019
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Subject: [Bug tree-optimization/81435] missing strlen optimization for strcat past the beginning of clear array
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #0)
> The tree-ssa-strlen pass is able to track the lengths of some dynamically
> created and modified strings by calls to strcpy and strcat.
Since the strlen pass begins with tree-ssa, and MAINTAINERS lists Andrew
MacLeod as the tree-ssa maintainer, does it make sense to cc him on
tree-ssa-strlen bugs like this? Or is that more just your special area?
>From gcc-bugs-return-640482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 04:51:33 2019
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Subject: [Bug tree-optimization/81343] missing strlen optimization with intervening strcat of unknown strings
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> See also pr81330 for another strlen optimization opportunity.
Well, and all other bugs blocking bug 83819 as well, that is
>From gcc-bugs-return-640483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 04:59:46 2019
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Subject: [Bug target/37073] -fno-math-errno should be the default on FreeBSD
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |gerald at pfeifer dot com
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> (In reply to Gerald Pfeifer from comment #2)
> > I'll see what I can do about this.
>
> Did you mean to put yourself as the assignee for this, instead of just on
> cc? I mean, since you changed the status to ASSIGNED...
Assuming yes and making Gerald the assignee
>From gcc-bugs-return-640484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 05:03:20 2019
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Subject: [Bug middle-end/64101] GCC considers that the erf math function does not set errno
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See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=88576,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=37073
--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> possibly related to some of the other -fmath-errno bugs that have been under
> discussion lately?
i.e., bug 88576 and bug 37073
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Subject: [Bug c++/90052] Warning for (x == 1 && x == 2) should be in -Wall
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> Reopening, as these warnings seem appropriate for -Wall
-Wlogical-op is not in -Wall or -Wextra due to bug 61534, bug 69602, and I
guess also bug 82240. At least those are those are the -Wlogical-op related
bugs blocking bug 87656...
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87656
[Bug 87656] Useful flags to enable with -Wall or -Wextra
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Fri, 12 Apr 2019 05:33:00 -0000
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--- Comment #44 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Comment on attachment 46013
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46013
updated patch.
@@ -122,12 +122,21 @@ extern tree arm_fp16_type_node;
#define TARGET_32BIT_P(flags) (TARGET_ARM_P (flags) || TARGET_THUMB2_P
(flags))
/* Run-time Target Specification. */
-/* Use hardware floating point instructions. */
+/* Use hardware floating point instructions. -mgeneral-regs-only prevents
+the use of floating point instructions and registers but does not prevent
+emission of floating point pcs attributes. */
#define TARGET_HARD_FLOAT (arm_float_abi != ARM_FLOAT_ABI_SOFT \
+ && bitmap_bit_p (arm_active_target.isa, \
+ isa_bit_vfpv2) \
+ && TARGET_32BIT \
+ && !TARGET_GENERAL_REGS_ONLY)
+
+#define TARGET_HARD_FLOAT_SUB (arm_float_abi != ARM_FLOAT_ABI_SOFT \
&& bitmap_bit_p (arm_active_target.isa, \
isa_bit_vfpv2) \
&& TARGET_32BIT)
BTW, you could define TARGET_HARD_FLOAT in terms of TARGET_HARD_FLOAT_SUB and
!TARGET_GENERAL_REGS_ONLY.
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
Date: Fri, 12 Apr 2019 06:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89255
--- Comment #16 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Fri Apr 12 06:25:04 2019
New Revision: 270301
URL: https://gcc.gnu.org/viewcvs?rev=270301&root=gcc&view=rev
Log:
d: Add -fbuilding-libphobos-tests option
Currently, the druntime and phobos unittests are compiled as a separate
check program, then ran by the libphobos.unittest/unittest.exp script.
As PR d/89255 notes, this process lacks proper multilib handling.
As a first step, a new internal option that instructs the compiler to
put the reference to all unittest functions in another symbol has been
added. This will allow each module to be compiled separately as a
standalone program using dg-runtest without running into collisions in
the D runtime module registry.
gcc/d/ChangeLog:
2019-04-12 Iain Buclaw <ibuclaw@gdcproject.org>
* d-tree.h (DECL_IN_UNITTEST_CONDITION_P): Define.
* decl.cc (DeclVisitor): Add in_version_unittest_ field.
(DeclVisitor::visit(ConditionalDeclaration)): New override.
(DeclVisitor::visit(FuncDeclaration)): Set
DECL_IN_UNITTEST_CONDITION_P.
* lang.opt (-fbuilding-libphobos-tests): Add option.
* modules.cc (current_testing_module): New static variable.
(build_module_tree): Generate second moduleinfo symbol to hold
reference to unittests if flag_building_libphobos_tests.
(register_module_decl): Check DECL_IN_UNITTEST_CONDITION_P to decide
which moduleinfo the decl should be registered against.
Modified:
trunk/gcc/d/ChangeLog
trunk/gcc/d/d-tree.h
trunk/gcc/d/decl.cc
trunk/gcc/d/lang.opt
trunk/gcc/d/modules.cc
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
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--- Comment #17 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Fri Apr 12 06:25:17 2019
New Revision: 270302
URL: https://gcc.gnu.org/viewcvs?rev=270302&root=gcc&view=rev
Log:
libphobos: Replace library check programs with dg-runtest
Fixes multilib handling when running the libphobos testsuite.
libphobos/ChangeLog:
2019-04-12 Iain Buclaw <ibuclaw@gdcproject.org>
PR d/89255
* configure.ac (ENABLE_SHARED, ENABLE_STATIC): Remove conditionals.
* configure: Regenerate.
* d_rules.am (%.t.lo, %.t.o): Remove rules.
(unittest_static_LINK, unittest_LINK, libgdruntime_t_la_LINK,
libgphobos_t_la_LINK): Remove variables.
* libdruntime/Makefile.am (DRUNTIME_TEST_LOBJECTS,
DRUNTIME_TEST_OBJECTS, check_PROGRAMS, check_LTLIBRARIES,
unittest_static_SOURCES, unittest_static_LIBTOOLFLAGS,
unittest_static_LDFLAGS, unittest_static_LDADD,
EXTRA_unittest_static_DEPENDENCIES, libgdruntime_t_la_SOURCES,
libgdruntime_t_la_LIBTOOLFLAGS, libgdruntime_t_la_LDFLAGS,
libgdruntime_t_la_LIBADD, EXTRA_libgdruntime_t_la_DEPENDENCIES,
unittest_SOURCES, unittest_LIBTOOLFLAGS, unittest_LDFLAGS,
unittest_LDADD): Remove variables.
(clean-local): Remove rule.
* libdruntime/Makefile.in: Regenerate.
* src/Makefile.am (PHOBOS_TEST_LOBJECTS,
PHOBOS_TEST_OBJECTS, check_PROGRAMS, check_LTLIBRARIES,
unittest_static_SOURCES, unittest_static_LIBTOOLFLAGS,
unittest_static_LDFLAGS, unittest_static_LDADD,
EXTRA_unittest_static_DEPENDENCIES, libgdruntime_t_la_SOURCES,
libgdruntime_t_la_LIBTOOLFLAGS, libgdruntime_t_la_LDFLAGS,
libgdruntime_t_la_LIBADD, EXTRA_libgdruntime_t_la_DEPENDENCIES,
unittest_SOURCES, unittest_LIBTOOLFLAGS, unittest_LDFLAGS,
unittest_LDADD): Remove variables.
(clean-local): Remove rule.
* src/Makefile.in: Regenerate.
* testsuite/lib/libphobos.exp (libphobos_test_name): New global.
(libphobos_init): Set libphobos_test_name.
(libphobos-dg-test): Override name if libphobos_test_name is set.
(filter_libphobos_unittests): New proc.
* testsuite/libphobos.aa/aa.exp: Don't load libphobos-dg.exp.
* testsuite/libphobos.cycles/cycles.exp: Set libphobos_test_name.
* testsuite/libphobos.druntime/druntime.exp: New file.
* testsuite/libphobos.druntime_shared/druntime_shared.exp: New file.
* testsuite/libphobos.phobos/phobos.exp: New file.
* testsuite/libphobos.phobos_shared/phobos_shared.exp: New file.
* testsuite/libphobos.shared/shared.exp: Use dg-runtest to run tests.
* testsuite/libphobos.hash/hash.exp: Don't load libphobos-dg.exp
* testsuite/libphobos.init_fini/init_fini.exp: Likewise.
* testsuite/libphobos.thread/thread.exp: Likewise.
* testsuite/libphobos.typeinfo/typeinfo.exp: Likewise.
* testsuite/libphobos.unittests/unittests.exp: Remove.
* testsuite/test_runner.d: Remove.
* testsuite/testsuite_flags.in: Add phobos to --gdcpaths.
Added:
trunk/libphobos/testsuite/libphobos.druntime/
trunk/libphobos/testsuite/libphobos.druntime/druntime.exp
- copied, changed from r270301,
trunk/libphobos/testsuite/libphobos.aa/aa.exp
trunk/libphobos/testsuite/libphobos.druntime_shared/
trunk/libphobos/testsuite/libphobos.druntime_shared/druntime_shared.exp
- copied, changed from r270301,
trunk/libphobos/testsuite/libphobos.aa/aa.exp
trunk/libphobos/testsuite/libphobos.phobos/
trunk/libphobos/testsuite/libphobos.phobos/phobos.exp
- copied, changed from r270301,
trunk/libphobos/testsuite/libphobos.aa/aa.exp
trunk/libphobos/testsuite/libphobos.phobos_shared/
trunk/libphobos/testsuite/libphobos.phobos_shared/phobos_shared.exp
- copied, changed from r270301,
trunk/libphobos/testsuite/libphobos.aa/aa.exp
Removed:
trunk/libphobos/testsuite/libphobos.unittests/
trunk/libphobos/testsuite/test_runner.d
Modified:
trunk/libphobos/ChangeLog
trunk/libphobos/configure
trunk/libphobos/configure.ac
trunk/libphobos/d_rules.am
trunk/libphobos/libdruntime/Makefile.am
trunk/libphobos/libdruntime/Makefile.in
trunk/libphobos/src/Makefile.am
trunk/libphobos/src/Makefile.in
trunk/libphobos/testsuite/lib/libphobos.exp
trunk/libphobos/testsuite/libphobos.aa/aa.exp
trunk/libphobos/testsuite/libphobos.cycles/cycles.exp
trunk/libphobos/testsuite/libphobos.hash/hash.exp
trunk/libphobos/testsuite/libphobos.init_fini/init_fini.exp
trunk/libphobos/testsuite/libphobos.shared/shared.exp
trunk/libphobos/testsuite/libphobos.thread/thread.exp
trunk/libphobos/testsuite/libphobos.typeinfo/typeinfo.exp
trunk/libphobos/testsuite/testsuite_flags.in
>From gcc-bugs-return-640489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 06:36:35 2019
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Subject: [Bug d/89255] libphobos.unittests multilib handling broken
Date: Fri, 12 Apr 2019 06:36:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #18 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Fixed in r270302.
I'll have a look through and create new issues for the failures related to
Solaris that don't have any relation to this pr.
>From gcc-bugs-return-640490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 07:19:58 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90017] gcc generates wrong debug information at -O3
Date: Fri, 12 Apr 2019 07:19:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Qirun Zhang from comment #3)
> (In reply to Alexandre Oliva from comment #2)
> > This odd behavior is an artifact of the way GCC lays out the basic blocks,
> > and how GDB interprets the line number program.
> >
> > The blocks containing the conditional calls to optimize_me_not in line 15
> > are moved to the end of the function, in reverse order, while the rest of
> > the inner loop, with code from lines 12 to 14, remains in sequential order.
> >
> > What GDB sees then is a long chunk of code all at line 15, the first of
> > which corresponds to the iteration l=8. l=7 is later, with another line
> > number mark, then l=6 and so on, but without intervening line number
> > changes, it takes it all as a single line. GDB pays no attention to the
> > is_stmt=1 markers at each and every one of them, let alone to the different
> > view numbers.
> >
> > So, yeah, definitely consumer issue.
>
> Hi Alex,
>
> Are you suggesting that it's a gdb bug? Perhaps, I can report it to gdb
> instead? Thanks.
Yes, reporting to gdb sounds appropriate.
>From gcc-bugs-return-640491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 07:28:02 2019
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Subject: [Bug rtl-optimization/90026] [8/9 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 12 07:27:25 2019
New Revision: 270304
URL: https://gcc.gnu.org/viewcvs?rev=270304&root=gcc&view=rev
Log:
PR rtl-optimization/90026
* cfgcleanup.c (try_optimize_cfg): When removing empty bb with no
successors, look for BARRIERs inside of the whole BB_FOOTER chain
rather than just at the start of it. If e->src BB_FOOTER is not NULL
in cfglayout mode, use emit_barrier_after_bb.
* g++.dg/opt/pr90026.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr90026.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgcleanup.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 07:29:14 2019
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Subject: [Bug c/89946] [8/9 Regression] ICE in assemble_start_function, at varasm.c:1871
Date: Fri, 12 Apr 2019 07:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89946
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 12 07:28:35 2019
New Revision: 270305
URL: https://gcc.gnu.org/viewcvs?rev=270305&root=gcc&view=rev
Log:
PR c/89946
* varasm.c (assemble_start_function): Don't use tree_fits_uhwi_p
and gcc_unreachable if it fails, just call tree_to_uhwi which
verifies that too. Test TREE_CHAIN instead of list_length > 1.
Start warning message with a lower-case letter. Formatting fixes.
c-family/
* c-attribs.c (handle_patchable_function_entry_attribute): Add
function comment. Warn if arguments of the attribute are not positive
integer constants.
testsuite/
* c-c++-common/pr89946.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr89946.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-attribs.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/varasm.c
>From gcc-bugs-return-640493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 07:29:36 2019
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Subject: [Bug rtl-optimization/90026] [8 Regression] ICE: verify_flow_info failed (error: missing barrier after block 2)
Date: Fri, 12 Apr 2019 07:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90026
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[8/9 Regression] ICE: |[8 Regression] ICE:
|verify_flow_info failed |verify_flow_info failed
|(error: missing barrier |(error: missing barrier
|after block 2) |after block 2)
Known to fail|9.0 |
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-640494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 07:30:50 2019
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Subject: [Bug c/89946] [8 Regression] ICE in assemble_start_function, at varasm.c:1871
Date: Fri, 12 Apr 2019 07:30:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] ICE in |[8 Regression] ICE in
|assemble_start_function, at |assemble_start_function, at
|varasm.c:1871 |varasm.c:1871
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-640495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 07:54:27 2019
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Subject: [Bug rtl-optimization/90049] Wrong expanding for a unsigned short ssa_name in embedded assembly code.
Date: Fri, 12 Apr 2019 07:54:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|mips-elf |
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This is not a bug:
__asm__ __volatile__ ("addiu %0, %1, 0\t\n" "movn %0, %2, %3" :
"=&r"(g_b.s_b.c):"r"(g_b.s_b.c),"r"(g_a.s_a.c),"r"((0 == g_a.s_a.a)));
The movn instruction uses 32-bit quantities but g_a.s_a.c is only 16-bit and
there is no implicit cast for asm operands. You need to write it like this:
__asm__ __volatile__ ("addiu %0, %1, 0\t\n" "movn %0, %2, %3" :
"=&r"(g_b.s_b.c):"r"((int)g_b.s_b.c),"r"((int)g_a.s_a.c),"r"((0 ==
g_a.s_a.a)));
>From gcc-bugs-return-640496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 08:03:41 2019
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Subject: [Bug gcov-profile/90053] New: [GCOV] A statement in while loop is wrongly marked as not executed when they are within the if(setjmp()) statement
Date: Fri, 12 Apr 2019 08:03:00 -0000
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Bug ID: 90053
Summary: [GCOV] A statement in while loop is wrongly marked as
not executed when they are within the if(setjmp())
statement
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.2.0-1ubuntu2~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04)
$ cat small.c
#include <setjmp.h>
#include <signal.h>
#include <stdlib.h>
static jmp_buf segv_jmpbuf;
static void segv_handler(int seg) { __builtin_longjmp(segv_jmpbuf, 1); }
static int is_addressable(void *p, size_t size)
{
volatile char * volatile cp = (volatile char *)p;
volatile int ret;
struct sigaction sa, origsa;
sigset_t mask;
sa.sa_handler = segv_handler;
sa.sa_flags = 0;
sigfillset(&sa.sa_mask);
sigaction(SIGSEGV, &sa, &origsa);
sigprocmask(SIG_SETMASK, NULL, &mask);
if (__builtin_setjmp(segv_jmpbuf) == 0) {
printf("size: %d\n", size);
while(size--)
{ *cp++; }
ret = 1;
} else {
ret = 0;
}
sigaction(SIGSEGV, &origsa, NULL);
sigprocmask(SIG_SETMASK, &mask, NULL);
return ret;
}
int main(int argc, char **argv)
{
is_addressable(0x0, 1);
return 0;
}
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
size: 1
File 'small.c'
Lines executed:95.00% of 20
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:#include <setjmp.h>
-: 2:#include <signal.h>
-: 3:#include <stdlib.h>
-: 4:
-: 5:static jmp_buf segv_jmpbuf;
1: 6:static void segv_handler(int seg) {
__builtin_longjmp(segv_jmpbuf, 1); }
-: 7:
1: 8:static int is_addressable(void *p, size_t size)
-: 9:{
1: 10: volatile char * volatile cp = (volatile char *)p;
-: 11: volatile int ret;
-: 12: struct sigaction sa, origsa;
-: 13: sigset_t mask;
-: 14:
1: 15: sa.sa_handler = segv_handler;
1: 16: sa.sa_flags = 0;
1: 17: sigfillset(&sa.sa_mask);
1: 18: sigaction(SIGSEGV, &sa, &origsa);
1: 19: sigprocmask(SIG_SETMASK, NULL, &mask);
-: 20:
2: 21: if (__builtin_setjmp(segv_jmpbuf) == 0) {
1: 22: printf("size: %d\n", size);
1: 23: while(size--)
#####: 24: { *cp++; }
1: 25: ret = 1;
-: 26: } else {
1: 27: ret = 0;
-: 28: }
-: 29:
2: 30: sigaction(SIGSEGV, &origsa, NULL);
1: 31: sigprocmask(SIG_SETMASK, &mask, NULL);
-: 32:
1: 33: return ret;
-: 34:}
-: 35:
1: 36:int main(int argc, char **argv)
-: 37:{
1: 38: is_addressable(0x0, 1);
1: 39: return 0;
-: 40:}
Line #24 is wrongly marked as not executed. The value of variable #size# is 1
before executing the while statement. Thus, Line #24 should be executed.
>From gcc-bugs-return-640497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 08:11:27 2019
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Subject: [Bug target/52726] Composed error message will not get translated
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 12 08:10:51 2019
New Revision: 270308
URL: https://gcc.gnu.org/viewcvs?rev=270308&root=gcc&view=rev
Log:
PR target/52726
* config/tilepro/tilepro.c (tilepro_print_operand): Use just
"invalid %%t operand" in output_operand_lossage message.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/tilepro/tilepro.c
>From gcc-bugs-return-640498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 08:25:01 2019
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Subject: [Bug rtl-optimization/90049] Wrong expanding for a unsigned short ssa_name in embedded assembly code.
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--- Comment #5 from Tao Wang <wangtao42 at huawei dot com> ---
(In reply to Eric Botcazou from comment #4)
> This is not a bug:
>
> __asm__ __volatile__ ("addiu %0, %1, 0\t\n" "movn %0, %2, %3" :
> "=&r"(g_b.s_b.c):"r"(g_b.s_b.c),"r"(g_a.s_a.c),"r"((0 == g_a.s_a.a)));
>
> The movn instruction uses 32-bit quantities but g_a.s_a.c is only 16-bit and
> there is no implicit cast for asm operands. You need to write it like this:
>
> __asm__ __volatile__ ("addiu %0, %1, 0\t\n" "movn %0, %2, %3" :
> "=&r"(g_b.s_b.c):"r"((int)g_b.s_b.c),"r"((int)g_a.s_a.c),"r"((0 ==
> g_a.s_a.a)));
But if g_a.s_a.c is 17 bits width, then there is a bit extract action like
this: ubfx x3, x3, #0, #17.
So why does this can work and the 16 bit width can not?
>From gcc-bugs-return-640499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 08:25:03 2019
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Subject: [Bug c++/90047] [8/9 Regression] internal compiler error: in finish_expr_stmt, at cp/semantics.c:680
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, clang++ rejects this:
/home/jakub/src/gcc/obj06i/usr/local/include/c++/9.0.1/type_traits:2427:44:
error: no type named 'type' in 'std::enable_if<false, void>';
'enable_if' cannot be used to disable this declaration
using enable_if_t = typename enable_if<_Cond, _Tp>::type;
^~~~~
pr90047.C:9:29: note: in instantiation of template type alias 'enable_if_t'
requested here
template <class U, std::enable_if_t<!std::is_array<T>::value>* = nullptr>
^
pr90047.C:26:26: note: in instantiation of template class 'STR<char [10],
&ctag1>' requested here
STR<char[10], ctag1> c1;
^
>From gcc-bugs-return-640500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 08:27:10 2019
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Subject: [Bug c/89933] [7/8/9 Regression] ICE in merge_decls, at c/c-decl.c:2517
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>From gcc-bugs-return-640501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 08:28:38 2019
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Subject: [Bug rtl-optimization/90049] Wrong expanding for a unsigned short ssa_name in embedded assembly code.
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
For 16bit, there is a direct integral mode called hi. Basically inline-asm is
really exposing gcc internals out to the user in an interesting way.
>From gcc-bugs-return-640502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 08:31:00 2019
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Subject: [Bug gcov-profile/90053] [GCOV] A statement in while loop is wrongly marked as not executed when they are within the if(setjmp()) statement
Date: Fri, 12 Apr 2019 08:31:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think you need to use setjmp/longjmp, not the __builtin variants which have
special semantics.
>From gcc-bugs-return-640503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 09:40:22 2019
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Subject: [Bug c++/89325] [7/8/9 Regression] False warnings about "optimization attribute" on operators when -fno-ipa-cp-clone
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| |nathan at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Doesn't look like hidden to me, I'd say that r265744 has been the right fix for
this. The diagnose_mismatched_attributes has been simply placed way too early,
before we check if the two decls actually shouldn't be merged because they have
different arguments (and not extern "C").
I'd say we should just say this is fixed for 9 and decide how to fix on release
branches.
Let me prepare a patch with some testcases for trunk.
>From gcc-bugs-return-640504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 09:51:43 2019
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Subject: [Bug gcov-profile/90054] New: [GCOV] A call statement to the __builtin_snprintf function is wrongly marked as not executed when it is in a for loop
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Bug ID: 90054
Summary: [GCOV] A call statement to the __builtin_snprintf
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in a for loop
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$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.2.0-1ubuntu2~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04)
$ cat small.c
int b = 1, d = 2;
char res[2];
void fn3 ()
{
for (;;)
{
__builtin_snprintf (res, 2, "%d\n", d);
if (d)
break;
}
printf("%s\n", res);
}
int main ()
{
fn3 ();
return 0;
}
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
2
File 'small.c'
Lines executed:88.89% of 9
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:int b = 1, d = 2;
-: 2:char res[2];
-: 3:
1: 4:void fn3 ()
-: 5:{
-: 6: for (;;)
-: 7: {
#####: 8: __builtin_snprintf (res, 2, "%d\n", d);
1: 9: if (d)
1: 10: break;
-: 11: }
1: 12: printf("%s\n", res);
1: 13:}
-: 14:
1: 15:int main ()
-: 16:{
1: 17: fn3 ();
1: 18: return 0;
-: 19:}
Line #8 is wrongly marked as not executed.
When the builtin_snprintf function is replaced with snprintf function, the
coverage report is correct as:
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
2
File 'small.c'
Lines executed:90.00% of 10
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:int b = 1, d = 2;
-: 2:char res[2];
-: 3:
1: 4:void fn3 ()
-: 5:{
-: 6: for (;;)
#####: 7: {
-: 8: // __builtin_snprintf (res, 2, "%d\n", d);
1: 9: snprintf (res, 2, "%d\n", d);
1: 10: if (d)
1: 11: break;
-: 12: }
1: 13: printf("%s\n", res);
1: 14:}
-: 15:
1: 16:int main ()
-: 17:{
1: 18: fn3 ();
1: 19: return 0;
-: 20:}
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Subject: [Bug ipa/88936] [7/8/9 Regression] -fipa-pta breaks bash (incorrect optimisation of recursive static function)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88936
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46146
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46146&action=edit
final fix
I am testing the following now which should do less work (but waste more UIDs
to be less conservative). The ipa-pta-3.c testcase is no longer affected,
we're more optimistically identifying candidates by just looking at a variables
function parameter solutions and globals for locals recursively reaching a
function.
>From gcc-bugs-return-640506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 09:56:52 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/88936] [7/8/9 Regression] -fipa-pta breaks bash (incorrect optimisation of recursive static function)
Date: Fri, 12 Apr 2019 09:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88936
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Testcase using globals instead of parameters:
static int *p;
void bar(int cnt)
{
int i = 0;
if (cnt == 0)
{
p = &i;
bar (1);
if (i != 1)
__builtin_abort ();
}
else if (cnt == 1)
*p = 1;
}
int main()
{
bar (0);
return 0;
}
>From gcc-bugs-return-640507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 10:16:00 2019
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Subject: [Bug fortran/78640] [F2018] gfortran accepts invalid allocatable polymorphic result in pure function
Date: Fri, 12 Apr 2019 10:15:00 -0000
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Jürgen Reuter <juergen.reuter at desy dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |juergen.reuter at desy dot de
--- Comment #4 from Jürgen Reuter <juergen.reuter at desy dot de> ---
In the meanwhile (F2018) this is C1584, and it says: "The function result of a
pure function shall not be both polymorphic and allocatable, or have a
polymorphic allocatable ultimate component."
So this is still not allowed. Funnily, also ifort does not veto this code,
nagfor however does:
Error: pr78640.f90, line 9: Result variable of pure function F is polymorphic
allocatable
>From gcc-bugs-return-640508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 10:25:14 2019
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Subject: [Bug gcov-profile/90054] [GCOV] A call statement to the __builtin_snprintf function is wrongly marked as not executed when it is in a for loop
Date: Fri, 12 Apr 2019 10:25:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk with r263111. Not planning to backport.
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Subject: [Bug tree-optimization/90055] New: Incorrect result with ffast-math + tree-vectorize
Date: Fri, 12 Apr 2019 10:35:00 -0000
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Bug ID: 90055
Summary: Incorrect result with ffast-math + tree-vectorize
Product: gcc
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Created attachment 46147
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46147&action=edit
Bug-provoking file
The attached code should produce the answer 0:
$ gcc-7 -O0 bug.c -o bug
$ ./bug
sum: 0.0000
Conversely:
$ gcc-7 -O3 -ffast-math -march=haswell -mtune=generic bug.c -o bug
$ ./bug
sum: -0.3750
And also
$ gcc-7 -O3 -ffast-math -march=haswell -mtune=haswell bug.c -o bug
$ ./bug
sum: -0.0937
If I turn off -ffast-math or add -fno-tree-loop-vectorize, the problem
disappears.
Output of gcc-7 -v -save-temps -O3 -ffast-math -march=haswell -mtune=generic
bug.c -o bug:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.3.0-27ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-ffast-math' '-march=haswell'
'-mtune=generic' '-o' 'bug'
/usr/lib/gcc/x86_64-linux-gnu/7/cc1 -E -quiet -v -imultiarch x86_64-linux-gnu
bug.c -march=haswell -mtune=generic -ffast-math -O3 -fpch-preprocess
-fstack-protector-strong -Wformat -Wformat-security -o bug.i
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-linux-gnu/7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-ffast-math' '-march=haswell'
'-mtune=generic' '-o' 'bug'
/usr/lib/gcc/x86_64-linux-gnu/7/cc1 -fpreprocessed bug.i -quiet -dumpbase
bug.c -march=haswell -mtune=generic -auxbase bug -O3 -version -ffast-math
-fstack-protector-strong -Wformat -Wformat-security -o bug.s
GNU C11 (Ubuntu 7.3.0-27ubuntu1~18.04) version 7.3.0 (x86_64-linux-gnu)
compiled by GNU C version 7.3.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (Ubuntu 7.3.0-27ubuntu1~18.04) version 7.3.0 (x86_64-linux-gnu)
compiled by GNU C version 7.3.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: c8081a99abb72bbfd9129549110a350c
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-ffast-math' '-march=haswell'
'-mtune=generic' '-o' 'bug'
as -v --64 -o bug.o bug.s
GNU assembler version 2.30 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.30
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-ffast-math' '-march=haswell'
'-mtune=generic' '-o' 'bug'
/usr/lib/gcc/x86_64-linux-gnu/7/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/7/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
-plugin-opt=-fresolution=bug.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -pie -z now -z relro -o bug
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/Scrt1.o
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/7/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/7
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../.. bug.o -lgcc --push-state --as-needed
-lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s --pop-state
/usr/lib/gcc/x86_64-linux-gnu/7/crtfastmath.o
/usr/lib/gcc/x86_64-linux-gnu/7/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crtn.o
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-O3' '-ffast-math' '-march=haswell'
'-mtune=generic' '-o' 'bug'
>From gcc-bugs-return-640510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 10:38:37 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89325] [7/8/9 Regression] False warnings about "optimization attribute" on operators when -fno-ipa-cp-clone
Date: Fri, 12 Apr 2019 10:38:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2019-04/msg00494.ht
| |ml
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Testsuite patch https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00494.html
>From gcc-bugs-return-640511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 10:50:43 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90050] std::filesystem::path segfault in destructor
Date: Fri, 12 Apr 2019 10:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90050
--- Comment #1 from Mihai Preda <mpreda at gmail dot com> ---
I would hope somebody would take a look and reject this issues as invalid for
some reason, because otherwise it's rather severe.
>From gcc-bugs-return-640512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 10:57:28 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90055] [7 Regression] Incorrect result with ffast-math + tree-vectorize
Date: Fri, 12 Apr 2019 10:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Known to work| |6.5.0, 8.1.0
Keywords| |needs-bisection, wrong-code
Last reconfirmed| |2019-04-12
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Incorrect result with |[7 Regression] Incorrect
|ffast-math + tree-vectorize |result with ffast-math +
| |tree-vectorize
Target Milestone|--- |7.5
Known to fail| |7.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed - this is likely a duplicate since it seems to be fixed on the GCC 8
branch and trunk. -mavx2 -mfma triggers the issue. w/o -mfma the GCC 7 branch
produces -0.0.
The GCC 8 branch doesn't vectorize the loop at t.c:104 but the basic-block at
103.
Note I observe different unrolling between 7 and 8 so the actual issue might
be latent.
Martin, can you bisect what fixed this?
>From gcc-bugs-return-640513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 11:09:55 2019
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Subject: [Bug tree-optimization/90055] [7 Regression] Incorrect result with ffast-math + tree-vectorize
Date: Fri, 12 Apr 2019 11:09:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk with r250959 which is:
364bc5b93b76cf88(08 Aug 2017 14:09): [took: 2.844s] result: OK
sum: 0.0000
SVN revision: 250959
Author: amker
* doc/invoke.texi: Document -ftree-loop-distribution for O3.
* opts.c (default_options_table): Add OPT_ftree_loop_distribution.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@250959
138bc75d-0d04-0410-961f-82ee72b054a4
Using:
gcc pr90055.c -O3 -ffast-math -march=haswell -mtune=haswell
-fno-tree-loop-distribution
it disappeared in r253934:
Author: hubicka
* x86-tune-costs.h (core_cost): Fix div, move and sqrt latencies.
and it started with r238033.
>From gcc-bugs-return-640514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 11:42:23 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.0
--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Situation is more complicated, deferring to GCC 10:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00495.html
>From gcc-bugs-return-640515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 11:49:09 2019
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Subject: [Bug middle-end/90056] New: 548.exchange2_r regressions on AMD Zen
Date: Fri, 12 Apr 2019 11:49:00 -0000
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Bug ID: 90056
Summary: 548.exchange2_r regressions on AMD Zen
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Blocks: 26163
Target Milestone: ---
Host: x86_64-linux
Target: x86_64-linux
As of revision 270053, the 548.exchange2_r benchmark from SPEC 2017
INTrate suite suffered a number of smaller regressions on AMD Zen
CPUs:
- At -O2, it is 4.5% slower than when compiled with GCC 7
- At -Ofast, it is 4.7% slower than when compiled with GCC 8
- At -Ofast -march=native -mutine=native, this difference is 6.9%
- At -Ofast and native tuning, it is 6% slower with PGO than
without it.
According to
https://lnt.opensuse.org/db_default/v4/SPEC/spec_report/options the
last regression on a different Ryzen CPU is 6.8 and PGO+LTO is 8.2%
slower than just native -Ofast.
Bisecting does not help much because the performance of the benchmark
has varied a lot. For example in September there was no PGO
regression but only because the non-PGO executable was equally slow.
I only have data from February from an Intel machine, but there I only
saw the native -Ofast regression, but it might have gone away
meanwhile.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
>From gcc-bugs-return-640516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 11:49:17 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #66 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #62)
> (In reply to Iain Sandoe from comment #61)
> > (In reply to Jonathan Wakely from comment #60)
> > > PR 81797 was the relevant bug, which apparently is still present for darwin
> > > when using the buggy new APFS filesystem
> >
> > so, from discussion on IRC, and notes above, this seems to be a known issue
> > (with AFPS only) and the current remedy is to continue the bootstrap.
> >
> > Let's consider that we have a viable work-around and then please can we wait
> > for a response from Apple and the clang devs before making a final fix?
> >
> > (i.e. this is enough of a work-around to prevent folks from being blocked
> > right now)
>
> BTW if you look at
> https://godbolt.org/z/7nwoLN
> and flip between C and C++, you will see that clang++ is not generating the
> same code for _Atomic int x, as clang (C).
Trying clang vs. clang++ (7.0.1) on
_Atomic int a = 4;
void foo () { a++; }
(admittedly on x86_64-linux), I get the same generated code with C and C++,
except for the mangling of the function, so it seems _Atomic is not ignored.
On the other side, if we fixinclude it, the fixincluded headers will be only
used for gcc and not clang, right, so the condition I wrote should be
sufficient. If the fixincluded headers would be also used by clang, then we
might want to add && !defined(__clang__) to that.
>From gcc-bugs-return-640517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 11:51:59 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/90057] New: [GCOV] Wrong coverage for "if()" statement while it is embedded with an empty "for(;0;)" loop statement
Date: Fri, 12 Apr 2019 11:51:00 -0000
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Bug ID: 90057
Summary: [GCOV] Wrong coverage for "if()" statement while it is
embedded with an empty "for(;0;)" loop statement
Product: gcc
Version: 8.2.0
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Target Milestone: ---
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.2.0-1ubuntu2~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04)
$ cat small.c
int main()
{
int b = 0, d = 0, f = 0, p = -1;
if (f > p && p)
for (; 0;)
;
else if (d)
b = 0 >= b;
return 0;
}
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
File 'small.c'
Lines executed:71.43% of 7
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:
1: 2:int main()
-: 3:{
1: 4: int b = 0, d = 0, f = 0, p = -1;
-: 5:
2: 6: if (f > p && p)
1: 7: for (; 0;)
-: 8: ;
#####: 9: else if (d)
#####: 10: b = 0 >= b;
-: 11:
1: 12: return 0;
-: 13:}
Line #6 is wrongly marked as executed twice.
While Line 7 is removed. The result is correct as:
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
File 'small.c'
Lines executed:66.67% of 6
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:
1: 2:int main()
-: 3:{
1: 4: int b = 0, d = 0, f = 0, p = -1;
-: 5:
1: 6: if (f > p && p)
-: 7: // for (; 0;)
-: 8: ;
#####: 9: else if (d)
#####: 10: b = 0 >= b;
-: 11:
1: 12: return 0;
-: 13:}
While Line #9 and Line #10 are both removed, the result is also correct as:
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
File 'small.c'
Lines executed:100.00% of 5
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:
1: 2:int main()
-: 3:{
1: 4: int b = 0, d = 0, f = 0, p = -1;
-: 5:
1: 6: if (f > p && p)
1: 7: for (; 0;)
-: 8: ;
-: 9: // else if (d)
-: 10: // b = 0 >= b;
-: 11:
1: 12: return 0;
-: 13:}
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Subject: [Bug gcov-profile/90054] [GCOV] A call statement to the __builtin_snprintf function is wrongly marked as not executed when it is in a for loop
Date: Fri, 12 Apr 2019 11:53:00 -0000
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--- Comment #2 from Yibiao Yang <yangyibiao at nju dot edu.cn> ---
(In reply to Martin Liška from comment #1)
> Fixed on trunk with r263111. Not planning to backport.
Got it. Thanks a lot.
>From gcc-bugs-return-640519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 11:56:14 2019
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Subject: [Bug gcov-profile/90053] [GCOV] A statement in while loop is wrongly marked as not executed when they are within the if(setjmp()) statement
Date: Fri, 12 Apr 2019 11:56:00 -0000
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--- Comment #2 from Yibiao Yang <yangyibiao at nju dot edu.cn> ---
(In reply to Richard Biener from comment #1)
> I think you need to use setjmp/longjmp, not the __builtin variants which have
> special semantics.
Thanks for the suggestion. This is a reduced version of the test program in the
gcc testsuite: gcc-7.4.0/gcc/testsuite/gcc.dg/setjmp-2.c
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Subject: [Bug regression/89733] [7/8/9 Regression] -Wuninitialized false positive with unclear message pointing to a class name
Date: Fri, 12 Apr 2019 11:59:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On the reduced testcase the warning is completely correct.
end_ is indeed uninitialized and then copied over in the Y<X> constructor.
As the ~F destructor is not defined, GCC can't optimize away those stores
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #67 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #66)
> (In reply to Iain Sandoe from comment #62)
> > (In reply to Iain Sandoe from comment #61)
> > > (In reply to Jonathan Wakely from comment #60)
> > > > PR 81797 was the relevant bug, which apparently is still present for darwin
> > > > when using the buggy new APFS filesystem
> > >
> > > so, from discussion on IRC, and notes above, this seems to be a known issue
> > > (with AFPS only) and the current remedy is to continue the bootstrap.
> > >
> > > Let's consider that we have a viable work-around and then please can we wait
> > > for a response from Apple and the clang devs before making a final fix?
> > >
> > > (i.e. this is enough of a work-around to prevent folks from being blocked
> > > right now)
> >
> > BTW if you look at
> > https://godbolt.org/z/7nwoLN
> > and flip between C and C++, you will see that clang++ is not generating the
> > same code for _Atomic int x, as clang (C).
>
> Trying clang vs. clang++ (7.0.1) on
> _Atomic int a = 4;
> void foo () { a++; }
> (admittedly on x86_64-linux), I get the same generated code with C and C++,
> except for the mangling of the function, so it seems _Atomic is not ignored.
Indeed, not sure what caused the compiler explorer instance to report
differently, I can't repeat now (for trunk or 7.x clang).
> On the other side, if we fixinclude it, the fixincluded headers will be only
> used for gcc and not clang, right,
right,
I don't see any mechanism at the moment for clang to use GCC's fixed includes
(it could be forced with -isystem, I suppose - but that's the User's decision).
> so the condition I wrote should be
> sufficient. If the fixincluded headers would be also used by clang, then we
> might want to add && !defined(__clang__) to that.
The folks I'm hoping for comments from are travelling this week (or, I think,
in one case on vacation) so perhaps we can wait a few more days for some
conclusion before applying this (it needs to go on the branches too, I
suppose).
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Subject: [Bug c++/88075] [feature-request] allow "concept" instead of "concept bool" with -fconcepts
Date: Fri, 12 Apr 2019 12:12:00 -0000
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--- Comment #1 from Hannes Hauswedell <h2+bugs at fsfe dot org> ---
I see that this has changed for snapshots of GCC9 now, thanks a lot! Is this
something you can backport to to GCC7 and GCC8 that would really help
downstream projects to reduce needless use of MACROs!
Thanks!
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Subject: [Bug gcov-profile/90057] [GCOV] Wrong coverage for "if()" statement while it is embedded with an empty "for(;0;)" loop statement
Date: Fri, 12 Apr 2019 12:12:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk in r263111.
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Subject: [Bug target/87532] bad results from vec_extract(unsigned char, foo) dependent upon function inline
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--- Comment #17 from kelvin at gcc dot gnu.org ---
Author: kelvin
Date: Fri Apr 12 12:51:58 2019
New Revision: 270313
URL: https://gcc.gnu.org/viewcvs?rev=270313&root=gcc&view=rev
Log:
gcc/ChangeLog:
2019-04-12 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/rs6000.c (rs6000_split_vec_extract_var): Use inner
mode of vector rather than mode of destination for move instruction.
* config/rs6000/vsx.md (*vsx_extract_<mode>_<VS_scalar>mode_var):
Use QI inner mode with V16QI vector mode.
gcc/testsuite/ChangeLog:
2019-04-12 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* gcc.target/powerpc/fold-vec-extract-char.p8.c: Adjust expected
instruction counts.
* gcc.target/powerpc/fold-vec-extract-int.p8.c: Likewise.
* gcc.target/powerpc/fold-vec-extract-short.p8.c: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/config/rs6000/vsx.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/fold-vec-extract-char.p8.c
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trunk/gcc/testsuite/gcc.target/powerpc/fold-vec-extract-short.p8.c
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Subject: [Bug middle-end/89970] [8/9 Regression] ICE in dispatch_function_versions, at config/i386/i386.c:32347
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Apr 12 12:54:00 2019
New Revision: 270314
URL: https://gcc.gnu.org/viewcvs?rev=270314&root=gcc&view=rev
Log:
Handle multiple 'default' in target attribute (PR middle-end/89970).
2019-04-12 Martin Liska <mliska@suse.cz>
PR middle-end/89970
* multiple_target.c (create_dispatcher_calls): Wrap ifunc
in error message.
(separate_attrs): Handle multiple 'default's.
(expand_target_clones): Rework error handling code.
2019-04-12 Martin Liska <mliska@suse.cz>
PR middle-end/89970
* gcc.target/i386/mvc15.c: New test.
* gcc.target/i386/mvc3.c: Quote target in error pattern.
* gcc.target/i386/mvc4.c: Remove duplicit 'default'.
Added:
trunk/gcc/testsuite/gcc.target/i386/mvc15.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/multiple_target.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/mvc3.c
trunk/gcc/testsuite/gcc.target/i386/mvc4.c
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/89970] [8/9 Regression] ICE in dispatch_function_versions, at config/i386/i386.c:32347
Date: Fri, 12 Apr 2019 12:56:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
Known to fail| |8.3.0
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk, not planning to backport.
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Subject: [Bug tree-optimization/87008] [8/9 Regression] gimple mem-to-mem assignment badly optimized
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is this now fixed on the trunk with r269556?
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From: "svenja.mehringer at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90058] New: False Positive in undefined-sanitizer only with GCC8
Date: Fri, 12 Apr 2019 13:09:00 -0000
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Bug ID: 90058
Summary: False Positive in undefined-sanitizer only with GCC8
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: svenja.mehringer at gmail dot com
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Created attachment 46148
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46148&action=edit
intermediate cpp file
Hi,
When compiling with the undefined-sanitizer I get an uninitialized warning with
GCC8 but not with GCC7 on the same intermediate file.
I created the intermediate file with GCC-7.4.0 (flags: -fsanitize=undefined
-fdiagnostics-color=always -O3 -DNDEBUG -pedantic -Wall -Wextra -Werror
-std=c++17 -fconcepts -save-temps)
Then when compiling the following (GCC-8.2.0)
g++-8 -O3 -Wall -fsanitize=undefined -std=c++17 -fconcepts -pthread -o
format_sam_test-gcc8 format_sam_test.ii
gtest_project/src/gtest_project-build/googletest/libgtest.a
gtest_project/src/gtest_project-build/googletest/libgtest_main.a
this fails with
```
In file included from
/srv/public/smehringer/seqan3/test/unit/io/alignment_file/format_sam_test.cpp:17:
/srv/public/smehringer/seqan3/include/seqan3/io/alignment_file/format_sam.hpp:
In lambda function:
/srv/public/smehringer/seqan3/include/seqan3/io/alignment_file/format_sam.hpp:635:58:
warning: ‘*((void*)&<anonymous> +12)’ may be used uninitialized in this
function [-Wmaybe-uninitialized]
write_range(stream_it,
(header.ref_ids())[get<0>(mate).value()]);
```
but the exact same command compiles fine with GCC-7.4.0
I'm working on Linux:
Linux 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19) x86_64 GNU/Linux
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85563] [8/9 regression] -Wmaybe-uninitialized false alarm regression with __builtin_unreachable and GCC 8
Date: Fri, 12 Apr 2019 13:10:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #12)
> > Canonical example would be if (int_arg + 32U <= 64U) __builtin_unreachable
> > (),
>
> We don't quite seem to put a range on int_arg with this. We have one
> temporarily, and deduce ranges for things computed based on int_arg, but I
> don't see one on int_arg itself after the pass.
I certainly do see that.
Try -O2 -fdump-tree-all-alias:
int
foo (int int_arg)
{
if (int_arg + 32U <= 64U) __builtin_unreachable ();
return int_arg;
}
Already in the evrp pass there is:
# RANGE ~[-32, 32]
int int_arg_3(D) = int_arg;
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Subject: [Bug d/90059] New: Solaris mcontext_t, ucontext_t declarations are wrong
Date: Fri, 12 Apr 2019 13:12:00 -0000
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Bug ID: 90059
Summary: Solaris mcontext_t, ucontext_t declarations are wrong
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: *-*-solaris2.*
Initially, all Solaris 11/SPARC execution tests (both 32 and 64-bit) FAILed
like
this:
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xfec37d08 in rw_wrlock_impl () from /lib/libc.so.1
(gdb) where
#0 0xfec37d08 in rw_wrlock_impl () from /lib/libc.so.1
#1 0xfec3e62c in sigaction () from /lib/libc.so.1
#2 0x000a8be4 in runModuleUnitTests ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:506
#3 0x0007bfac in runAll (this=this@entry=0xffbfe78c)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:484
#4 0x0007ba9c in tryExec (this=0xffbfe78c, dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:460
#5 0x0007bcb4 in _d_run_main (argc=1, argv=<optimized out>,
mainFunc=<optimized out>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:493
#6 0x000686d4 in main (argc=1, argv=0xffbfe864)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44
#7 0x000684c4 in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
with libphobos built with -g3 -O0:
0xfec37cec <rw_wrlock_impl>: save %sp, -96, %sp
0xfec37cf0 <rw_wrlock_impl+4>: ld [ %g7 + 0x54 ], %i5
0xfec37cf4 <rw_wrlock_impl+8>: sethi %hi(0x2800), %i3
0xfec37cf8 <rw_wrlock_impl+12>: mov %g7, %l6
0xfec37cfc <rw_wrlock_impl+16>: add %i3, 0x146, %i2
0xfec37d00 <rw_wrlock_impl+20>: rd %pc, %i4
0xfec37d04 <rw_wrlock_impl+24>: sethi %hi(0x6a000), %g1
=> 0xfec37d08 <rw_wrlock_impl+28>: ldsb [ %i5 + %i2 ], %l7
(gdb) p/x $i5
$14 = 0x0
(gdb) p/x $i2
$15 = 0x2946
The first arg (an rwlock_t *) should never be NULL.
After some debugging, this turned out to be memory corruption happening after
the call to swapcontext in fiber_switchContext. The root cause was that the
declarations
of mcontext_t and ucontext_t in core.sys.posix.ucontext are badly wrong for
Solaris/SPARC. After correcting them as in the attached patch, those SEGVs
are gone.
Solaris/x86 is mostly right, the only correction being the introduction of the
uc_xrs member of struct ucontext_t. This doesn't change either size or
alignment, so it's primarily a cosmetic issue.
This again seems strongly to argue for an approach like libgo's (generating
Go structure declarations from the system headers at build time) or at least
libsanitizer's (verifying struct sizes and member offsets at runtime) to avoid
such isses.
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Subject: [Bug d/90059] Solaris mcontext_t, ucontext_t declarations are wrong
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
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Subject: [Bug c++/90058] False Positive in undefined-sanitizer only with GCC8
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
As has been said many times, the -fsanitize= instrumentation affects (sometimes
a lot) the optimizations and so introduces various late warning false
positives.
Use -fsanitize= to build the instrumented code, but pay more attention to
warnings from non-instrumented builds.
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Subject: [Bug d/90059] Solaris mcontext_t, ucontext_t declarations are wrong
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90059
--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 46149
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46149&action=edit
Correct Solaris mcontext_t, ucontext_t declarations
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/90060] New: libphobos.druntime_shared/core/thread.d FAILs on Solaris/SPARC
Date: Fri, 12 Apr 2019 13:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90060
Bug ID: 90060
Summary: libphobos.druntime_shared/core/thread.d FAILs on
Solaris/SPARC
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
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Target: sparc*-sun-solaris2.11
Created attachment 46150
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46150&action=edit
Use __makecontext_v2 on Solaris/SPARC
With PR d/90059 fixed, (at least) the core.thread unittest FAILs:
FAIL: libphobos.druntime_shared/core/thread.d execution test
Segmentation fault while running unittests:
----------------
Program terminated with signal SIGSEGV, Segmentation fault.
#0 sparc64_is_sighandler (nframes=<synthetic pointer>,
cfa=0xffffffff7fffd470, pc=0xffffffff7f5c3fc8) at ./md-unwind-support.h:39
39 ./md-unwind-support.h: No such file or directory.
[Current thread is 2 (Thread 1 (LWP 1))]
(gdb) where
#0 sparc64_is_sighandler (nframes=<synthetic pointer>,
cfa=0xffffffff7fffd470, pc=0xffffffff7f5c3fc8) at ./md-unwind-support.h:39
#1 sparc64_fallback_frame_state (fs=0xffffffff7fffbf40,
context=0xffffffff7fffbb50) at ./md-unwind-support.h:271
#2 uw_frame_state_for (context=context@entry=0xffffffff7fffbb50,
fs=fs@entry=0xffffffff7fffbf40)
at
/builds2/ulhg/workspace/Solaris_Trunk/Userland/full-build/02b-build-sparc/components/gcc7/gcc-7.3.0/libgcc/unwind-dw2.c:1257
#3 0xffffffff73b0ed50 in _Unwind_Backtrace (
trace=0xffffffff5d362438 <simple_unwind>,
trace_argument=0xffffffff7fffc6d0)
at
/builds2/ulhg/workspace/Solaris_Trunk/Userland/full-build/02b-build-sparc/components/gcc7/gcc-7.3.0/libgcc/unwind.inc:290
#4 0xffffffff5d3624dc in backtrace_simple (state=0xffffffff7f5e8000,
skip=<optimized out>, callback=0xffffffff5d2e40c4 <simpleCallback>,
error_callback=0xffffffff5d2e4c28 <simpleErrorCallback>,
data=0xffffffff7fffc860)
at /vol/gcc/src/hg/trunk/solaris/libbacktrace/simple.c:106
#5 0xffffffff5d2e521c in gcc.backtrace.LibBacktrace.this(int) (
this=0xffffffff7fffc860, firstFrame=1)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gcc/backtrace.d:227
#6 0xffffffff5d2cd248 in
core.runtime.runModuleUnitTests().unittestSegvHandler(int,
core.sys.posix.signal.siginfo_t*, void*) (signum=11,
info=0xffffffff7fffd370, ptr=0xffffffff7fffd060)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:492
#7 <signal handler called>
#8 0xffffffff7ef261b0 in memset%sun4v-hwcap4 () from /lib/64/libc.so.1
#9 0xffffffff7ede9108 in makecontext () from /lib/64/libc.so.1
#10 0x0000000100015bbc in core.thread.Fiber.initStack() (
this=0xffffffff7f1f6000)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/thread.d:5051
#11 0x0000000100015930 in core.thread.Fiber.reset() (this=0xffffffff7f1f6000)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/thread.d:4294
#12 0x000000010001536c in core.thread.Fiber.reset(void() delegate) (
this=0xffffffff7f1f6000, dg=...)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/thread.d:4309
#13 0x00000001000152a4 in core.thread.Fiber.this(void() delegate, ulong, ulong)
(this=0xffffffff7f1f6000, dg=..., sz=32768, guardPageSize=8192)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/thread.d:4157
#14 0x000000010001620c in core.thread.TestFiber.this() (
this=0xffffffff7f1f6000)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/thread.d:5175
#15 0x0000000100016300 in core.thread.runTen() ()
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/thread.d:5195
#16 0x0000000100016578 in core.thread.__unittestL5218_20() ()
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/thread.d:5220
#17 0x0000000100018cf8 in core.thread.__modtest() () at <no_file>:1
#18 0xffffffff5d2cd388 in __foreachbody2 (this=0xffffffff7fffe308,
m=0x1001208b8 <ModuleInfo for core.gdc.modtest__thread>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:558
#19 0xffffffff5d2f49ec in object.ModuleInfo.__lambda2 (
this=0xffffffff7fffe230,
m=0x1001208b8 <ModuleInfo for core.gdc.modtest__thread>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1599
#20 0xffffffff5d30f600 in rt.minfo.__foreachbody2 (this=0xffffffff7fffe158,
sg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:777
#21 0xffffffff5d314410 in rt.sections_elf_shared.DSO.opApply(scope int(ref
rt.sections_elf_shared.DSO) delegate) (dg=...)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:69
#22 0xffffffff5d30f4e8 in rt.minfo.moduleinfos_apply(scope
int(immutable(object.ModuleInfo*)) delegate) (dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:770
#23 0xffffffff5d2f26bc in object.ModuleInfo.opApply(scope
int(object.ModuleInfo*) delegate) (dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1598
#24 0xffffffff5d2cd074 in runModuleUnitTests ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:548
#25 0xffffffff5d3031fc in runAll (this=0xffffffff7fffe640)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:484
#26 0xffffffff5d30313c in tryExec (this=0xffffffff7fffe640, dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:460
#27 0xffffffff5d303034 in _d_run_main (argc=1, argv=0xffffffff7fffe898,
mainFunc=0x100018dfc <D main>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:493
#28 0x0000000100018dac in main (argc=1, argv=0xffffffff7fffe898)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44
#29 0x000000010000d3ec in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
truss shows that this is an access to unmapped memory
/1: getcontext(0xFFFFFFFF7F1F6060)
Incurred fault #6, FLTBOUNDS %pc = 0xFFFFFFFF7EF261B0
siginfo: SIGSEGV SEGV_MAPERR addr=0xFFFFFFFF7F5C3F40
Received signal #11, SIGSEGV [caught]
siginfo: SIGSEGV SEGV_MAPERR addr=0xFFFFFFFF7F5C3F40
which initially seemed weird happening when makecontext calls memset.
Ultimately
I remembered that Solaris/SPARC has a weird quirk in makecontext, as documented
in makecontext(3C):
NOTES
The semantics of the uc_stack member of the ucontext_t structure have
changed as they apply to inputs to makecontext(). Prior to Solaris 10,
the ss_sp member of the uc_stack structure represented the high memory
address of the area reserved for the stack. The ss_sp member now repre-
sents the base (low memory address), in keeping with other uses of
ss_sp.
Compatibility with older code is achieved by this snippet in <ucontext.h>:
#ifdef __sparc
#ifdef __PRAGMA_REDEFINE_EXTNAME
#pragma redefine_extname makecontext __makecontext_v2
The attached patch does the same in ucontext.d, which makes the test PASS.
>From gcc-bugs-return-640535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 13:28:24 2019
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Subject: [Bug d/90060] libphobos.druntime_shared/core/thread.d FAILs on Solaris/SPARC
Date: Fri, 12 Apr 2019 13:28:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
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Subject: [Bug fortran/89291] internal compiler error: in gfc_trans_use_stmts
Date: Fri, 12 Apr 2019 13:31:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> If someone wants to try to download and build this.
Too many prerequisites for me!-(
Closing as INVALID.
>From gcc-bugs-return-640537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 13:33:57 2019
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Subject: [Bug translation/90061] New: ARM cortex-M hard fault on 64 bit sized object store to unaligned address
Date: Fri, 12 Apr 2019 13:33:00 -0000
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Bug ID: 90061
Summary: ARM cortex-M hard fault on 64 bit sized object store
to unaligned address
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: translation
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When generating code for ARM Cortex M4 CPU, and a 64 bit object is stored in
memory to a possibly unaligned address, the code generated will cause an
exception in the case the address is not single word (32 bit aligned).
This fault is dependent on optimisation level in some cases.
This is because the 64 bit store operation generates either a STD or a STMIA
style instruction which requires 32 bit address alignment.
Single 32 bit word stores can be unaligned.
#pragma pack(push, 1)
struct hardwareExample
{
char x;
long a;
long b;
} s;
#pragma pack(pop)
If you are accessing hardware or message buffers where the structs map 1:1 to
external message content, you may well try to set the value of s.a and s.b
close together. The optimiser may try to combine these as a store multiple
operation on an ARM has always been more efficient than independent writes.
In -Og mode this code generates two independent 32 bit store unaligned
operations and it works.
In -Os mode this code will combine s.a and s.b store into a single STD or STMIA
instruction and produce a hard fault.
If the 64 bit value is an atomic type ; long long or double float for instance
then you cannot escape the hard fault.
In normal code , this problem does not occur as the structure would be created
with the correct alignment for the types, and would be allocated at the correct
alignment for the types concerned.
It is only where I am handling e.g. a binary GPS protocol.
There are always workarounds, it is just annoying that -Og code will work and
-Os code will fail (sometimes dependent on arbitrary structure alignment)
>From gcc-bugs-return-640538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 13:36:39 2019
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Subject: [Bug translation/90061] ARM cortex-M hard fault on 64 bit sized object store to unaligned address
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Michael James <mike at hamble dot online> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |ARM Cortex M4
--- Comment #1 from Michael James <mike at hamble dot online> ---
I have seen the same bug in I believe versions of GCC from 4.x onwards
>From gcc-bugs-return-640539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 13:37:37 2019
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Subject: [Bug d/90062] New: SPARC stack alignment is wrong
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90062
Bug ID: 90062
Summary: SPARC stack alignment is wrong
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-*-*
Created attachment 46151
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46151&action=edit
Correct SPARC stack alignment
Even after the ucontext_t and makecontext patches, Solaris/SPARC execution
tests
were still FAILing (seem to have lost the notes about the details ;-().
However,
I found that stack alignment was less than the SPARC ABI requires, i.e.
doubleword
alignment (also cf. sparc/sparc.h (SPARC_STACK_ALIGN)).
The attached patch fixes that. However, I've been lazy and always use the
existing
16-byte alignment code, although strictly speaking 32-bit SPARC only needs 8
bytes.
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/87008] [8 Regression] gimple mem-to-mem assignment badly optimized
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Version|9.0 |8.3.1
Summary|[8/9 Regression] gimple |[8 Regression] gimple
|mem-to-mem assignment badly |mem-to-mem assignment badly
|optimized |optimized
--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #9)
> Is this now fixed on the trunk with r269556?
Yes. (And I guess it is about time I should start preparing a backport to GCC
8 too.)
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/90063] New: druntime DSO first assertion fails on Solaris/SPARC
Date: Fri, 12 Apr 2019 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90063
Bug ID: 90063
Summary: druntime DSO first assertion fails on Solaris/SPARC
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-sun-solaris2.11
The next issue with Solaris 11/SPARC execution tests is
FAIL: libphobos.druntime_shared/core/internal/hash.d execution test
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xffffffff5e858a5c in gc_malloc (sz=80, ba=0,
ti=0xffffffff5e988de0 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gc/proxy.d:117
117 return instance.malloc(sz, ba, ti);
(gdb) where
#0 0xffffffff5e858a5c in gc_malloc (sz=80, ba=0,
ti=0xffffffff5e988de0 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gc/proxy.d:117
#1 0xffffffff5e7cc74c in core.memory.GC.malloc(ulong, uint, const(TypeInfo)) (
sz=80, ba=0,
ti=0xffffffff5e988de0 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/memory.d:380
#2 0xffffffff5e803b60 in _d_newclass (
ci=0xffffffff5e988de0 <ClassInfo for core.exception.AssertError>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/lifetime.d:96
#3 0xffffffff5e7c9df8 in onAssertError (file=..., line=398)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:441
#4 0xffffffff5e7ca444 in _d_assert (file=..., line=398)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:641
#5 0xffffffff5e815684 in _d_dso_registry (data=0xffffffff7fffcfa0)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:398
#6 0x00000001000037cc in gdc.dso_ctor () at <no_file>:1
#7 0x0000000100002db8 in global constructors keyed to 4core8internal4hash ()
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../libdruntime/core/internal/hash.d:1
#8 0xffffffff7f3253f0 in call_array () from /usr/lib/sparcv9/ld.so.1
#9 0xffffffff7f325590 in call_init () from /usr/lib/sparcv9/ld.so.1
#10 0xffffffff7f335524 in elf_bndr () from /usr/lib/sparcv9/ld.so.1
#11 0xffffffff7f316488 in elf_rtbndr () from /usr/lib/sparcv9/ld.so.1
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
#5 0xffffffff5e815684 in _d_dso_registry (data=0xffffffff7fffcfa0)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:398
398 assert(handleForAddr(data._slot) ==
handleForAddr(&rt_get_bss_start));
(gdb) p data
$2 = (rt.sections_elf_shared.CompilerDSOData *) 0xffffffff7fffcfa0
(gdb) p *data
$3 = {_version = 1, _slot = 0x1001043d8 <gdc.dso_slot>,
_minfo_beg = 0x1001043b0 <__start_minfo>, _minfo_end = 0x1001043c8}
I haven't dug further yet why this fails on Solaris/SPARC, but not on
Solaris/x86.
For the moment, I've just disabled the assert.
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Subject: [Bug d/90063] druntime DSO first assertion fails on Solaris/SPARC
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/85563] [8/9 regression] -Wmaybe-uninitialized false alarm regression with __builtin_unreachable and GCC 8
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--- Comment #16 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #15)
> I certainly do see that.
Uh, indeed. I don't remember what I may have tested where we failed to set a
range, or maybe I just got confused, better ignore my comment then.
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/90064] New: InSituRegion lacks SPARC64 support
Date: Fri, 12 Apr 2019 13:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90064
Bug ID: 90064
Summary: InSituRegion lacks SPARC64 support
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-*-*
Created attachment 46152
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46152&action=edit
InSituRegion SPARC64 support
This tests only FAILs on 64-bit SPARC:
FAIL:
libphobos.phobos_shared/std/experimental/allocator/building_blocks/bitmapped_block.d
(test for excess errors)
Excess errors:
/vol/gcc/src/hg/trunk/solaris/libphobos/src/std/experimental/allocator/building_blocks/region.d:402:
error: undefined identifier 'growDownwards'
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/experimental/allocator/building_blocks/bitmapped_block.d:698:
error: template instance
std.experimental.allocator.building_blocks.region.InSituRegion!(10240LU, 64LU)
error instantiating
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/experimental/allocator/building_blocks/bitmapped_block.d:700:
note: while evaluating: static assert(hasMember!(InSituRegion!(10240LU, 64LU),
"allocateAll"))
The fix is trivial: just handle SPARC64 like SPARC. The attached patch does
that.
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----------------------------------------------------------------------------
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/90065] New: Unaligned accesses on strict-alignment targets
Date: Fri, 12 Apr 2019 14:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90065
Bug ID: 90065
Summary: Unaligned accesses on strict-alignment targets
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-*-*
Created attachment 46153
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46153&action=edit
src/std/math.d alignment hack
I see a couple of tests FAIL due to the same issue on Solaris/SPARC: they die
with SIGBUS due to unaligned access, which is a no-no on strict-alignment
targets.
FAIL: libphobos.phobos_shared/std/math.d execution test
Segmentation fault while running unittests:
----------------
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:492 extern
(C) void core.runtime.runModuleUnitTests().unittestSegvHandler(int,
core.sys.posix.signal.siginfo_t*, void*) [0xffffffff590cd287]
??:? __sighndlr [0xffffffff7eee41bf]
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d:6178 pure
nothrow @nogc @trusted real std.math.NaN(ulong) [0x10003744c]
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d:1052
nothrow @nogc @safe void std.math.__unittestL1001_11() [0x100037273]
/var/gcc/gcc-9.0.1-20190408/11.5-gcc-gas-libphobos/sparc-sun-solaris2.11/libphobos/testsuite/libphobos9/<no_file>:1
void std.math.__modtest() [0x1000697c3]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:558
__foreachbody2 [0xffffffff590cd3c7]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1599 __lambda2
[0xffffffff590f4a2b]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:777
__foreachbody2 [0xffffffff5910f63f]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:69
int rt.sections_elf_shared.DSO.opApply(scope int delegate(ref
rt.sections_elf_shared.DSO)) [0xffffffff5911444f]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:770 int
rt.minfo.moduleinfos_apply(scope int delegate(immutable(object.ModuleInfo*)))
[0xffffffff5910f527]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1598 int
object.ModuleInfo.opApply(scope int delegate(object.ModuleInfo*))
[0xffffffff590f26fb]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:548
runModuleUnitTests [0xffffffff590cd0b3]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:484 runAll
[0xffffffff5910323b]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:460 tryExec
[0xffffffff5910317b]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:493 _d_run_main
[0xffffffff59103073]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44 main
[0x100069b3f]
??:? _start [0x100032e8b]
truss shows the SIGBUS
Incurred fault #5, FLTACCESS %pc = 0x10003734C
siginfo: SIGBUS BUS_ADRALN addr=0xFFFFFFFF7FFFD942
Received signal #10, SIGBUS [default]
siginfo: SIGBUS BUS_ADRALN addr=0xFFFFFFFF7FFFD942
but gdb currently mis-reports it as SIGSEGV (as does the libdruntime signal
handler).
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x000000010003734c in std.math.NaN(ulong) (payload=291)
at /vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d:6178
6178 *cast(ulong*)(2+cast(ubyte*)(&x)) = v;
(gdb) where
#0 0x000000010003734c in std.math.NaN(ulong) (payload=291)
at /vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d:6178
#1 0x0000000100037174 in std.math.__unittestL1001_11() ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d:1052
#2 0x00000001000696c4 in std.math.__modtest() () at <no_file>:1
#3 0xffffffff57bcd3c8 in __foreachbody2 (this=0xffffffff7fffdfe8,
m=0x1001bfb38 <ModuleInfo for std.gdc.modtest__math>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:558
#4 0xffffffff57bf4a2c in object.ModuleInfo.__lambda2 (
this=0xffffffff7fffdf10,
m=0x1001bfb38 <ModuleInfo for std.gdc.modtest__math>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1599
#5 0xffffffff57c0f640 in rt.minfo.__foreachbody2 (this=0xffffffff7fffde38,
sg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:777
#6 0xffffffff57c14450 in rt.sections_elf_shared.DSO.opApply(scope int(ref
rt.sections_elf_shared.DSO) delegate) (dg=...)
at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:69
#7 0xffffffff57c0f528 in rt.minfo.moduleinfos_apply(scope
int(immutable(object.ModuleInfo*)) delegate) (dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:770
#8 0xffffffff57bf26fc in object.ModuleInfo.opApply(scope
int(object.ModuleInfo*) delegate) (dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1598
#9 0xffffffff57bcd0b4 in runModuleUnitTests ()
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:548
#10 0xffffffff57c0323c in runAll (this=0xffffffff7fffe380)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:484
#11 0xffffffff57c0317c in tryExec (this=0xffffffff7fffe380, dg=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:460
#12 0xffffffff57c03074 in _d_run_main (argc=1, argv=0xffffffff7fffe5c8,
mainFunc=0x100069a90 <D main>)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:493
#13 0x0000000100069a40 in main (argc=1, argv=0xffffffff7fffe5c8)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44
#14 0x0000000100032d8c in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
0x000000010003734c in std.math.NaN(ulong) (payload=291)
at /vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d:6178
6178 *cast(ulong*)(2+cast(ubyte*)(&x)) = v;
I'm hacking around this one in the attached patch, but will only report the
rest.
With the hack in place, this still FAILs, though:
core.exception.AssertError@/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d(1506):
unittest failure
----------------
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gcc/deh.d:499 _d_throw
[0xffffffff57be6d53]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:459
onAssertErrorMsg [0xffffffff57bc9fa3]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:476
onUnittestErrorMsg [0xffffffff57bca03f]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:654
_d_unittest_msg [0xffffffff57bca5db]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:659
_d_unittest [0xffffffff57bca56b]
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/../src/std/math.d:1506 void
std.math.__unittestL1499_21() [0x10003b34b]
/var/gcc/gcc-9.0.1-20190408/11.5-gcc-gas-libphobos/sparc-sun-solaris2.11/libphobos/testsuite/<no_file>:1
void std.math.__modtest() [0x100069737]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:558
__foreachbody2 [0xffffffff57bcd3c7]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1599 __lambda2
[0xffffffff57bf4a2b]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:777
__foreachbody2 [0xffffffff57c0f63f]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/sections_elf_shared.d:69
int rt.sections_elf_shared.DSO.opApply(scope int delegate(ref
rt.sections_elf_shared.DSO)) [0xffffffff57c1444f]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/minfo.d:770 int
rt.minfo.moduleinfos_apply(scope int delegate(immutable(object.ModuleInfo*)))
[0xffffffff57c0f527]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:1598 int
object.ModuleInfo.opApply(scope int delegate(object.ModuleInfo*))
[0xffffffff57bf26fb]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/runtime.d:548
runModuleUnitTests [0xffffffff57bcd0b3]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:484 runAll
[0xffffffff57c0323b]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:460 tryExec
[0xffffffff57c0317b]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/dmain2.d:493 _d_run_main
[0xffffffff57c03073]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/__entrypoint.di:44 main
[0x100069a63]
??:? _start [0x100032d8b]
FAIL: gdc.test/runnable/sdtor.d -g execution test
Incurred fault #5, FLTACCESS %pc = 0x1000D79AC
siginfo: SIGBUS BUS_ADRALN addr=0x10007C904
Received signal #10, SIGBUS [default]
siginfo: SIGBUS BUS_ADRALN addr=0x10007C904
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x00000001000d79ac in _d_newarrayiT (
ti=0x10007dc10 <initializer for TypeInfo_AS5sdtor2S8>, length=3)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/lifetime.d:991
991 (cast(T*)result.ptr)[0 .. size * length / T.sizeof] =
*cast(T*)init.ptr;
(gdb) where
#0 0x00000001000d79ac in _d_newarrayiT (
ti=0x10007dc10 <initializer for TypeInfo_AS5sdtor2S8>, length=3)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/lifetime.d:991
#1 0x000000010008729c in sdtor.test8() () at runnable/sdtor.d:201
#2 0x00000001000b6234 in D main () at runnable/sdtor.d:4532
FAIL: gdc.test/runnable/foreach5.d execution test
Incurred fault #5, FLTACCESS %pc = 0x1000701FC
siginfo: SIGBUS BUS_ADRALN addr=0xFFFFFFFF7FFFE214
Received signal #10, SIGBUS [default]
siginfo: SIGBUS BUS_ADRALN addr=0xFFFFFFFF7FFFE214
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x00000001000701fc in foreach5.test14653() () at runnable/foreach5.d:1080
1080 foreach (e; scoped14653!RangeClass14653(1))
(gdb) where
#0 0x00000001000701fc in foreach5.test14653() () at runnable/foreach5.d:1080
#1 0x0000000100070514 in D main () at runnable/foreach5.d:1118
FAIL: gdc.test/runnable/complex.d -shared-libphobos execution test
Incurred fault #5, FLTACCESS %pc = 0xFFFFFFFF56D06108
siginfo: SIGBUS BUS_ADRALN addr=0xFFFFFFFF56E90CFC
Received signal #10, SIGBUS [default]
siginfo: SIGBUS BUS_ADRALN addr=0xFFFFFFFF56E90CFC
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xffffffff56d06108 in _d_newarrayiT (
ti=0x10013f600 <initializer for TypeInfo_Aq>, length=2)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/lifetime.d:991
991 (cast(T*)result.ptr)[0 .. size * length / T.sizeof] =
*cast(T*)init.ptr;
(gdb) where
#0 0xffffffff56d06108 in _d_newarrayiT (
ti=0x10013f600 <initializer for TypeInfo_Aq>, length=2)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/lifetime.d:991
#1 0x000000010001dc00 in complex.test8966() () at runnable/complex.d:321
#2 0x000000010001ec94 in D main (args=...) at runnable/complex.d:451
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/90065] Unaligned accesses on strict-alignment targets
Date: Fri, 12 Apr 2019 14:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90065
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
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From: "yangyibiao at nju dot edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/90066] New: [GCOV] function with inline attribute leading to incorrect coverage for the "if" statement
Date: Fri, 12 Apr 2019 14:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90066
Bug ID: 90066
Summary: [GCOV] function with inline attribute leading to
incorrect coverage for the "if" statement
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: yangyibiao at nju dot edu.cn
CC: marxin at gcc dot gnu.org
Target Milestone: ---
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
8.2.0-1ubuntu2~18.04' --with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04)
$ cat small.c
int check_int (int *i, int align)
{
*i = 20;
return *i;
}
typedef int aligned __attribute__((aligned(64)));
static void
inline __attribute__((always_inline))
foo (void)
{
aligned i;
if (check_int (&i, __alignof__(i)) != i)
; // abort ();
}
int main()
{
foo ();
return 0;
}
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
File 'small.c'
Lines executed:100.00% of 6
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
1: 1:int check_int (int *i, int align)
-: 2:{
1: 3: *i = 20;
1: 4: return *i;
-: 5:}
-: 6:
-: 7:typedef int aligned __attribute__((aligned(64)));
-: 8:
-: 9:static void
-: 10:inline __attribute__((always_inline))
-: 11:foo (void)
-: 12:{
-: 13: aligned i;
2: 14: if (check_int (&i, __alignof__(i)) != i)
-: 15: ; // abort ();
-: 16:}
-: 17:
1: 18:int main()
-: 19:{
-: 20: foo ();
1: 21: return 0;
-: 22:}
Line #14 is wrongly marked as executed twice. This statement should be only
executed once.
1. While Line #10 @@inline __attribute__((always_inline))@@ is removed, the
result is correct as:
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
File 'small.c'
Lines executed:100.00% of 9
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
1: 1:int check_int (int *i, int align)
-: 2:{
1: 3: *i = 20;
1: 4: return *i;
-: 5:}
-: 6:
-: 7:typedef int aligned __attribute__((aligned(64)));
-: 8:
-: 9:static void
-: 10:// inline __attribute__((always_inline))
1: 11:foo (void)
-: 12:{
-: 13: aligned i;
1: 14: if (check_int (&i, __alignof__(i)) != i)
-: 15: ; // abort ();
1: 16:}
-: 17:
1: 18:int main()
-: 19:{
1: 20: foo ();
1: 21: return 0;
-: 22:}
2. While Line #12 is not removed, the result is also correct as:
$ gcc -w -O0 --coverage small.c; ./a.out; gcov-8 small.c; cat small.c.gcov
File 'small.c'
Lines executed:85.71% of 7
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 0:Programs:1
1: 1:int check_int (int *i, int align)
-: 2:{
1: 3: *i = 20;
1: 4: return *i;
-: 5:}
-: 6:
-: 7:typedef int aligned __attribute__((aligned(64)));
-: 8:
-: 9:static void
-: 10:inline __attribute__((always_inline))
-: 11:foo (void)
-: 12:{
-: 13: aligned i;
1: 14: if (check_int (&i, __alignof__(i)) != i)
#####: 15: abort ();
-: 16:}
-: 17:
1: 18:int main()
-: 19:{
-: 20: foo ();
1: 21: return 0;
-: 22:}
>From gcc-bugs-return-640550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 14:07:05 2019
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Subject: [Bug translation/90061] ARM cortex-M hard fault on 64 bit sized object store to unaligned address
Date: Fri, 12 Apr 2019 14:07:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-12
CC| |amonakov at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Please provide an example, as a simple smoke-test is compiled correctly:
long f(struct hardwareExample *h)
{
return h->a + h->b;
}
produces
f:
ldr r2, [r0, #1] @ unaligned
ldr r0, [r0, #5] @ unaligned
add r0, r0, r2
bx lr
>From gcc-bugs-return-640551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 14:07:32 2019
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Subject: [Bug tree-optimization/81435] missing strlen optimization for strcat past the beginning of clear array
Date: Fri, 12 Apr 2019 14:07:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I think it means that Andrew is a maintainer of the overall tree-ssa
infrastructure. AFAIK, he has not done any work on the strlen optimizations in
the file. Jakub is the author of the pass so he knows the most about it. But
he's also aware of most bugs that come in so I don't think he needs to be CC'd.
Most of the bugs I raised for the strlen pass are enhancements. I noticed them
while testing various warnings (-Wstringop-overflow, -Wrestrict, etc.) where
they imply false negatives. The optimizations themselves aren't necessarily
critical to performance but the better the strlen pass is at optimizing stuff
the better the warnings are at finding bugs.
I expect to be doing some work on the strlen pass for GCC 10 so I might pick up
some of these bugs in the process.
>From gcc-bugs-return-640552-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 14:08:14 2019
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Subject: [Bug tree-optimization/87008] [8 Regression] gimple mem-to-mem assignment badly optimized
Date: Fri, 12 Apr 2019 14:08:00 -0000
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--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
The original testcase also shows a small, unrelated regression: DSE3 used to be
able to remove the initialization of sum to 0 when there were 2 statements
(setting each element to 0). Now that we vectorize so that sum is initialized
with { 0.0, 0.0 } in a single statement, DSE doesn't manage anymore, it doesn't
see that the 2 writes together cover the whole thing. Probably if we improved
the vectorizer to vectorize this loop (I think the blocker is that we go from
{x,y} to {x+y,x+y}), it would manage again.
>From gcc-bugs-return-640553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 14:10:48 2019
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Subject: [Bug gcov-profile/90066] [GCOV] function with inline attribute leading to incorrect coverage for the "if" statement
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P5
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-12
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
This is again a test-case with a dead condition:
_1 = check_int (&i, 64);
i.0_2 = i;
if (_1 != i.0_2) goto <D.1921>; else goto <D.1922>;
<D.1921>:
<D.1922>:
>From gcc-bugs-return-640554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 14:38:55 2019
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Subject: [Bug fortran/90048] Fortran OpenACC 'private' clause rejected for predetermined private loop iteration variable
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Fortran OpenACC 'private' |Fortran OpenACC 'private'
|clause rejected for |clause rejected for
|implicitly private loop |predetermined private loop
|iteration variable |iteration variable
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(Summary corrected to say "predetermined private" instead of "implicitly
private".)
OpenACC 2.6 (same in 2.7), in section 2.6.1. "Variables with Predetermined Data
Attributes" states that "The loop variable in a C 'for' statement or Fortran
'do' statement that is associated with a loop directive is predetermined to be
private to each thread that will execute each iteration of the loop. Loop
variables in Fortran 'do' statements within a compute construct are
predetermined to be private to the thread that executes the loop".
It also states in section 2.6. "Data Environment" that "Variables with
predetermined data attributes may not appear in a data clause that conflicts
with that data attribute", which can be understood to mean that such variables
may (redundantly) appear in clauses that conform with that data attribute.
>From gcc-bugs-return-640555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 14:39:36 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Fri, 12 Apr 2019 14:39:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |vmakarov at gcc dot gnu.org
--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #15)
> Forming thread by copy 0:a0r111-a4r117 (freq=500):
> Result (freq=3500): a0r111(2500) a4r117(1000)
> Forming thread by copy 2:a3r112-a5r116 (freq=125):
> Result (freq=4500): a3r112(1500) a5r116(3000)
> Forming thread by copy 1:a2r114-a3r112 (freq=62):
> Result (freq=5500): a2r114(1000) a3r112(1500) a5r116(3000)
> Pushing a1(r113,l0)(cost 0)
> Pushing a4(r117,l0)(cost 0)
> Pushing a0(r111,l0)(cost 0)
> Pushing a2(r114,l0)(cost 0)
> Pushing a3(r112,l0)(cost 0)
> Pushing a5(r116,l0)(cost 0)
> Popping a5(r116,l0) -- assign reg 3
> Popping a3(r112,l0) -- assign reg 4
> Popping a2(r114,l0) -- assign reg 3
> Popping a0(r111,l0) -- assign reg 0
> Popping a4(r117,l0) -- assign reg 0
> Popping a1(r113,l0) -- assign reg 2
> Assigning 4 to a5r116
> Disposition:
> 0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
> 5:r116 l0 4 4:r117 l0 0
>
>
> r116 does not conflict with *any* other pseudo. It is alive in the first
> two insns of the function, which are
>
> (insn 50 3 7 2 (set (reg:SI 116)
> (reg:SI 0 r0 [ a ])) "ira-shrinkwrap-prep-1.c":14:1 181
> {*arm_movsi_insn}
> (nil))
> (insn 7 50 8 2 (parallel [
> (set (reg:CC 100 cc)
> (compare:CC (reg:SI 116)
> (const_int 0 [0])))
> (set (reg/v:SI 112 [ a ])
> (reg:SI 116))
> ]) "ira-shrinkwrap-prep-1.c":17:6 188 {*movsi_compare0}
> (expr_list:REG_DEAD (reg:SI 116)
> (nil)))
>
> r0 _is_ used by a successor (as the argument for the call to foo), but we
> could use r0 for r116 anyway, since what we assign to it is r0 :-)
CCing Vlad on this. I don't see that *movsi_compare0 would in any way prefer
the =r,0 alternative over =r,r and using the =r,r alternative would allow to
remove one instruction.
>From gcc-bugs-return-640556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 14:53:04 2019
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From: "mike at hamble dot online" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90061] ARM cortex-M hard fault on 64 bit sized object store to unaligned address
Date: Fri, 12 Apr 2019 14:53:00 -0000
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--- Comment #3 from Michael James <mike at hamble dot online> ---
HiSimple tests do not seem to be failing here either regardless of
optimisation.They are all producing correct 32 bit load/stores that can be
non-aligned. I shall try and extract the code from my larger project on
Monday.MikePLEASE NOTE email address change to mike@hamble.online
-------- Original message --------From: "amonakov at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> Date: 12/04/2019 15:07 (GMT+00:00) To:
mike@hamble.online Subject: [Bug translation/90061] ARM cortex-M hard fault on
64 bit sized
 object store to unaligned address
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90061Alexander Monakov <amonakov
at gcc dot gnu.org> changed:          What   |Removed                   Â
|Added----------------------------------------------------------------------------
           Status|UNCONFIRMED                |WAITING  Last reconfirmed|   Â
                      |2019-04-12                CC|                        Â
 |amonakov at gcc dot gnu.org    Ever confirmed|0                         Â
|1--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---Please
provide an example, as a simple smoke-test is compiled correctly:long f(struct
hardwareExample *h){   return h->a + h->b;}producesf:       ldr    r2, [r0,
#1]     @ unaligned       ldr    r0, [r0, #5]     @ unaligned       add  Â
r0, r0, r2       bx     lr-- You are receiving this mail because:You
reported the bug.
>From gcc-bugs-return-640557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 15:06:00 2019
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90067] New: Loop variables in Fortran 'do' statements within a compute construct must be predetermined private
Date: Fri, 12 Apr 2019 15:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90067
Bug ID: 90067
Summary: Loop variables in Fortran 'do' statements within a
compute construct must be predetermined private
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: fortran
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Target Milestone: ---
Found while working on PR90048.
OpenACC 2.6 (same in 2.7), in section 2.6.1. "Variables with Predetermined Data
Attributes" states that "The loop variable in a C 'for' statement or Fortran
'do' statement that is associated with a loop directive is predetermined to be
private to each thread that will execute each iteration of the loop. Loop
variables in Fortran 'do' statements within a compute construct are
predetermined to be private to the thread that executes the loop".
Regarding the latter, for Fortran 'do' statements that are not directly
associated with a 'loop' directive, when these 'do' statements are (somewhere)
nested inside a 'loop' construct, we implement this in the front end by adding
a 'private' clause to the containing 'loop' construct, but when these 'do'
statements are not (somewhere) nested inside a 'loop' construct, we do not add
a 'private' clause to the containing compute construct. For example, for:
integer :: i
!$acc parallel
do i = 1, 100
end do
!$acc end parallel
..., we do not in the front end add a 'private(i)' clause to the 'parallel'
construct.
By the rules as presented in section 2.5. "Compute Constructs", the gimplifier
will then fix this up by adding a 'firstprivate' clause, in the common case of
the 'parallel' construct (same for the 'serial' construct, but a 'copy' clause
for the 'kernels' construct!).
While it might generally be beneficial to have a pass promoting
'firstprivate(x)' with a dominating write operation on 'x' to 'private(x)',
here it would be better (and much simpler) to handle this in the front end.
>From gcc-bugs-return-640558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 15:13:08 2019
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Fri, 12 Apr 2019 15:13:00 -0000
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--- Comment #45 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #42)
> Thanks for the explanation.
> In that case, I think it would be better to just add
> __attribute__((target("general-regs-only")))
> to the
> #ifdef __ARM_EABI_UNWINDER__
> _Unwind_Reason_Code
> PERSONALITY_FUNCTION (_Unwind_State, struct _Unwind_Exception *,
> struct _Unwind_Context *);
> decl in unwind-c.c and similarly for eh_personality.cc and to other
> personality routines that use CONTINUE_UNWINDING as well (plus to
> unwind-arm.c and pr-support.c using pragma for everything).
Thanks for all the analysis, this is what I had - I've been swamped this week
on a few other things, let me get this wrapped up soonish. (read it as during
next week).(In reply to Bernd Edlinger from comment #44)
> Comment on attachment 46013 [details]
> updated patch.
>
> @@ -122,12 +122,21 @@ extern tree arm_fp16_type_node;
> #define TARGET_32BIT_P(flags) (TARGET_ARM_P (flags) || TARGET_THUMB2_P
> (flags))
>
> /* Run-time Target Specification. */
> -/* Use hardware floating point instructions. */
> +/* Use hardware floating point instructions. -mgeneral-regs-only prevents
> +the use of floating point instructions and registers but does not prevent
> +emission of floating point pcs attributes. */
> #define TARGET_HARD_FLOAT (arm_float_abi != ARM_FLOAT_ABI_SOFT \
> + && bitmap_bit_p (arm_active_target.isa, \
> + isa_bit_vfpv2) \
> + && TARGET_32BIT \
> + && !TARGET_GENERAL_REGS_ONLY)
> +
> +#define TARGET_HARD_FLOAT_SUB (arm_float_abi != ARM_FLOAT_ABI_SOFT \
> && bitmap_bit_p (arm_active_target.isa, \
> isa_bit_vfpv2) \
> && TARGET_32BIT)
>
>
> BTW, you could define TARGET_HARD_FLOAT in terms of TARGET_HARD_FLOAT_SUB and
> !TARGET_GENERAL_REGS_ONLY.
Yep I could - been traveling quite a lot and I haven't managed to find someone
else to catch this - I will pick this up next week .
My fault, apologies.
Ramana
>From gcc-bugs-return-640559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 15:24:31 2019
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From: "rene.rahn@fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Fri, 12 Apr 2019 15:24:00 -0000
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--- Comment #4 from rene.rahn@fu-berlin.de ---
Hi gcc-team,
is there any news about this issue? This ICE currently is always triggered when
using the range-v3 library using the 1.0-beta branch with concepts.
Let me know, if you need more information.
Kind regards
>From gcc-bugs-return-640560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 15:24:43 2019
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Subject: [Bug target/89993] Inconsistent incoming stack boundary
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
-mstackrealign works as intended. It will align the stack for
the function and won't align the stack for the outgoing stack.
>From gcc-bugs-return-640561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 15:26:35 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #18 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #15)
> Popping a5(r116,l0) -- assign reg 3
> Popping a3(r112,l0) -- assign reg 4
> Popping a2(r114,l0) -- assign reg 3
> Popping a0(r111,l0) -- assign reg 0
> Popping a4(r117,l0) -- assign reg 0
> Popping a1(r113,l0) -- assign reg 2
> Assigning 4 to a5r116
> Disposition:
> 0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
> 5:r116 l0 4 4:r117 l0 0
>
>
> r116 does not conflict with *any* other pseudo. It is alive in the first
> two insns of the function, which are
So we initially assign r3 to r116 presumably because it has the same cost as
the other gprs and it occurs first in REG_ALLOC_ORDER. Then
improve_allocation() decides that r4 is a better hard reg and switches the
assignment to that. I'm not sure why it wouldn't choose r0 there instead.
>From gcc-bugs-return-640562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 15:27:43 2019
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Subject: [Bug tree-optimization/90055] [7 Regression] Incorrect result with ffast-math + tree-vectorize
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #2)
> Fixed on trunk with r250959 which is:
>
> 364bc5b93b76cf88(08 Aug 2017 14:09): [took: 2.844s] result: OK
> sum: 0.0000
> SVN revision: 250959
> Author: amker
> * doc/invoke.texi: Document -ftree-loop-distribution for O3.
> * opts.c (default_options_table): Add OPT_ftree_loop_distribution.
>
>
> git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@250959
> 138bc75d-0d04-0410-961f-82ee72b054a4
>
> Using:
> gcc pr90055.c -O3 -ffast-math -march=haswell -mtune=haswell
> -fno-tree-loop-distribution
>
> it disappeared in r253934:
>
> Author: hubicka
> * x86-tune-costs.h (core_cost): Fix div, move and sqrt latencies.
Those look like they are all would cause the issue to go latent.
>
> and it started with r238033.
This one does it might be the real cause of the issue.
>From gcc-bugs-return-640563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 15:29:39 2019
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Subject: [Bug c++/87603] [C++17] noexcept isn't special cased for constant expressions anymore
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Apr 12 15:29:03 2019
New Revision: 270320
URL: https://gcc.gnu.org/viewcvs?rev=270320&root=gcc&view=rev
Log:
PR c++/87603 - constexpr functions are no longer noexcept.
* constexpr.c (is_sub_constant_expr): Remove unused function.
* cp-tree.h (is_sub_constant_expr): Remove declaration.
* except.c (check_noexcept_r): Don't consider a call to a constexpr
function noexcept.
* g++.dg/cpp0x/constexpr-noexcept.C: Adjust the expected result.
* g++.dg/cpp0x/constexpr-noexcept3.C: Likewise.
* g++.dg/cpp0x/constexpr-noexcept4.C: Likewise.
* g++.dg/cpp0x/constexpr-noexcept8.C: New test.
* g++.dg/cpp0x/inh-ctor32.C: Remove dg-message.
* g++.dg/cpp1y/constexpr-noexcept1.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-noexcept8.C
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-noexcept1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/except.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-noexcept.C
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-noexcept3.C
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trunk/gcc/testsuite/g++.dg/cpp0x/inh-ctor32.C
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87603] [C++17] noexcept isn't special cased for constant expressions anymore
Date: Fri, 12 Apr 2019 15:31:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 9 (all dialects changed).
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Fri, 12 Apr 2019 15:34:00 -0000
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--- Comment #19 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #18)
> (In reply to Segher Boessenkool from comment #15)
> > Popping a5(r116,l0) -- assign reg 3
> > Popping a3(r112,l0) -- assign reg 4
> > Popping a2(r114,l0) -- assign reg 3
> > Popping a0(r111,l0) -- assign reg 0
> > Popping a4(r117,l0) -- assign reg 0
> > Popping a1(r113,l0) -- assign reg 2
> > Assigning 4 to a5r116
> > Disposition:
> > 0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
> > 5:r116 l0 4 4:r117 l0 0
> >
> >
> > r116 does not conflict with *any* other pseudo. It is alive in the first
> > two insns of the function, which are
>
> So we initially assign r3 to r116 presumably because it has the same cost as
> the other gprs and it occurs first in REG_ALLOC_ORDER. Then
> improve_allocation() decides that r4 is a better hard reg and switches the
> assignment to that. I'm not sure why it wouldn't choose r0 there instead.
I would expect that r116 has a strong preference for r0 given the r116 = mov r0
and thus allocating r116 to r0 should have the lowest cost by a large margin.
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Subject: [Bug translation/90041] Command line option without proper quoting in translation message
Date: Fri, 12 Apr 2019 16:13:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 12 16:12:49 2019
New Revision: 270321
URL: https://gcc.gnu.org/viewcvs?rev=270321&root=gcc&view=rev
Log:
PR translation/90041
* exgettext: Print MissingArgError, UnknownError or Warn
*.opt argument using error or warning instead of _ to mark it
as gcc-internal-format.
* c.opt (-fhandle-exceptions): Use %< and %> around option names
in the Warn diagnostics.
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c.opt
trunk/gcc/po/ChangeLog
trunk/gcc/po/exgettext
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Subject: [Bug rtl-optimization/89965] [8/9 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 12 16:20:21 2019
New Revision: 270323
URL: https://gcc.gnu.org/viewcvs?rev=270323&root=gcc&view=rev
Log:
PR rtl-optimization/89965
* dce.c: Include rtl-iter.h.
(struct check_argument_load_data): New type.
(check_argument_load): New function.
(find_call_stack_args): Check for loads from stack slots still tracked
in sp_bytes and punt if any is found.
* gcc.target/i386/pr89965.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr89965.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dce.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/89965] [8 Regression] wrong code with -O -mtune=nano-x2 -fcaller-saves -fexpensive-optimizations -fno-tree-dce -fno-tree-ter
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[8/9 Regression] wrong code |[8 Regression] wrong code
|with -O -mtune=nano-x2 |with -O -mtune=nano-x2
|-fcaller-saves |-fcaller-saves
|-fexpensive-optimizations |-fexpensive-optimizations
|-fno-tree-dce -fno-tree-ter |-fno-tree-dce -fno-tree-ter
Known to fail|9.0 |
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90041] Command line option without proper quoting in translation message
Date: Fri, 12 Apr 2019 16:26:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
%e/%n still not resolved and won't be until GCC 10.
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From: "brichardson at structint dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90068] New: Array Constructor Containing Function Call Leaks Memory
Date: Fri, 12 Apr 2019 16:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90068
Bug ID: 90068
Summary: Array Constructor Containing Function Call Leaks
Memory
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: brichardson at structint dot com
Target Milestone: ---
It appears that without an intermediate value to save the result of the
function call, the value returned by the function ends up being leaked memory.
The following example program and commands demonstrate the problem.
program array_memory_leak
implicit none
type, abstract :: base
end type base
type, extends(base) :: extended
end type extended
type :: container
class(base), allocatable :: thing
end type
type, extends(base) :: collection
type(container), allocatable :: stuff(:)
end type collection
call run()
contains
subroutine run()
type(collection) :: my_thing
type(container) :: a_container
a_container = newContainer(newExtended()) ! This is fine
my_thing = newCollection([a_container])
my_thing = newCollection([newContainer(newExtended())]) ! This is a
memory leak
end subroutine run
function newExtended()
type(extended) :: newExtended
end function newExtended
function newContainer(thing)
class(base), intent(in) :: thing
type(container) :: newContainer
allocate(newContainer%thing, source = thing)
end function newContainer
function newCollection(things)
type(container), intent(in) :: things(:)
type(collection) :: newCollection
newCollection%stuff = things
end function newCollection
end program array_memory_leak
$ gfortran -g array_memory_leak.f90 -o array_memory_leak
$ valgrind --leak-check=full ./array_memory_leak
==7652== Memcheck, a memory error detector
==7652== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==7652== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==7652== Command: ./array_memory_leak
==7652==
==7652==
==7652== HEAP SUMMARY:
==7652== in use at exit: 1 bytes in 1 blocks
==7652== total heap usage: 29 allocs, 28 frees, 13,554 bytes allocated
==7652==
==7652== 1 bytes in 1 blocks are definitely lost in loss record 1 of 1
==7652== at 0x483777F: malloc (vg_replace_malloc.c:299)
==7652== by 0x109A0B: newcontainer.3817 (array_memory_leak.f90:38)
==7652== by 0x10A17C: run.3822 (array_memory_leak.f90:27)
==7652== by 0x1091E6: MAIN__ (array_memory_leak.f90:18)
==7652== by 0x10A96B: main (array_memory_leak.f90:18)
==7652==
==7652== LEAK SUMMARY:
==7652== definitely lost: 1 bytes in 1 blocks
==7652== indirectly lost: 0 bytes in 0 blocks
==7652== possibly lost: 0 bytes in 0 blocks
==7652== still reachable: 0 bytes in 0 blocks
==7652== suppressed: 0 bytes in 0 blocks
==7652==
==7652== For counts of detected and suppressed errors, rerun with: -v
==7652== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
I'm running the official version of gcc on Arch Linux. I'm also running a
version of 9.0 from September at work, which exhibits the same behavior.
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Subject: [Bug fortran/90069] New: Polymorphic Return Type Memory Leak Without Intermediate Variable
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90069
Bug ID: 90069
Summary: Polymorphic Return Type Memory Leak Without
Intermediate Variable
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: brichardson at structint dot com
Target Milestone: ---
It appears that, if a function returns a polymorphic (i.e. class(thing))
variable, if the result is not assigned to a variable, then a memory leak
occurs.
The following short program and command output demonstrates the problem.
program returned_memory_leak
implicit none
type, abstract :: base
end type base
type, extends(base) :: extended
end type extended
type :: container
class(*), allocatable :: thing
end type
call run()
contains
subroutine run()
type(container) :: a_container
a_container = theRightWay()
a_container = theWrongWay()
end subroutine
function theRightWay()
type(container) :: theRightWay
class(base), allocatable :: thing
allocate(thing, source = newAbstract())
theRightWay = newContainer(thing)
end function theRightWay
function theWrongWay()
type(container) :: theWrongWay
theWrongWay = newContainer(newAbstract())
end function theWrongWay
function newAbstract()
class(base), allocatable :: newAbstract
allocate(newAbstract, source = newExtended())
end function newAbstract
function newExtended()
type(extended) :: newExtended
end function newExtended
function newContainer(thing)
class(*), intent(in) :: thing
type(container) :: newContainer
allocate(newContainer%thing, source = thing)
end function newContainer
end program returned_memory_leak
$ gfortran -g returned_memory_leak.f90 -o returned_memory_leak
$ valgrind --leak-check=full ./returned_memory_leak
==7972== Memcheck, a memory error detector
==7972== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==7972== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==7972== Command: ./returned_memory_leak
==7972==
==7972==
==7972== HEAP SUMMARY:
==7972== in use at exit: 3 bytes in 3 blocks
==7972== total heap usage: 27 allocs, 24 frees, 13,526 bytes allocated
==7972==
==7972== 1 bytes in 1 blocks are definitely lost in loss record 1 of 3
==7972== at 0x483777F: malloc (vg_replace_malloc.c:299)
==7972== by 0x1093BD: newabstract.3812 (returned_memory_leak.f90:41)
==7972== by 0x109601: therightway.3816 (returned_memory_leak.f90:28)
==7972== by 0x1098BE: run.3818 (returned_memory_leak.f90:19)
==7972== by 0x1091D6: MAIN__ (returned_memory_leak.f90:14)
==7972== by 0x109AD4: main (returned_memory_leak.f90:14)
==7972==
==7972== 1 bytes in 1 blocks are definitely lost in loss record 2 of 3
==7972== at 0x483777F: malloc (vg_replace_malloc.c:299)
==7972== by 0x1093BD: newabstract.3812 (returned_memory_leak.f90:41)
==7972== by 0x10945E: thewrongway.3814 (returned_memory_leak.f90:35)
==7972== by 0x109965: run.3818 (returned_memory_leak.f90:20)
==7972== by 0x1091D6: MAIN__ (returned_memory_leak.f90:14)
==7972== by 0x109AD4: main (returned_memory_leak.f90:14)
==7972==
==7972== 1 bytes in 1 blocks are definitely lost in loss record 3 of 3
==7972== at 0x483777F: malloc (vg_replace_malloc.c:299)
==7972== by 0x1093BD: newabstract.3812 (returned_memory_leak.f90:41)
==7972== by 0x10946D: thewrongway.3814 (returned_memory_leak.f90:35)
==7972== by 0x109965: run.3818 (returned_memory_leak.f90:20)
==7972== by 0x1091D6: MAIN__ (returned_memory_leak.f90:14)
==7972== by 0x109AD4: main (returned_memory_leak.f90:14)
==7972==
==7972== LEAK SUMMARY:
==7972== definitely lost: 3 bytes in 3 blocks
==7972== indirectly lost: 0 bytes in 0 blocks
==7972== possibly lost: 0 bytes in 0 blocks
==7972== still reachable: 0 bytes in 0 blocks
==7972== suppressed: 0 bytes in 0 blocks
==7972==
==7972== For counts of detected and suppressed errors, rerun with: -v
==7972== ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 0 from 0)
Note, whatever leak is happening in theRightWay function appears to have been
fixed in the version of 9.0 from September that we are using at work, so don't
worry about that one for this bug report.
I'm using the official version on Arch Linux in the above.
>From gcc-bugs-return-640572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 17:42:38 2019
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90070] New: Add optimization for optimizing small integer values by fp integral constant
Date: Fri, 12 Apr 2019 17:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90070
Bug ID: 90070
Summary: Add optimization for optimizing small integer values
by fp integral constant
Product: gcc
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I was looking at the Spec 2017 imagick benchmark, and in particular at the hot
function in enhance.c.
The code has many places where it has:
typedef struct _PixelPacket
{
unsigned short blue;
unsigned short green;
unsigned short red;
unsigned short opacity;
} PixelPacket;
typedef struct _MagickPixelPacket
{
float red;
float green;
float blue;
float opacity;
float index;
} MagickPixelPacket;
/* ... */
foo () {
MagickPixelPacket aggregate;
/* ... */
aggregate.red+=(5.0)*((r)->red);
/* ... */
}
In particular this becomes:
double temp1 = (double)r->red;
double temp2 = (double)aggregate.red;
double temp3 = temp2 + (temp1 * 5.0);
aggregate.red = (float) temp3;
This is due to 5.0 being considered a double precision constant.
It occurs to me that on many machines, multiplying an int by 5 is cheaper than
multiplying a double by 5.0. In particular, since you are multiply an unsigned
short by 5.0, you know the value will fit in a 32-bit or 64-bit integer. This
would mean the example might be executed as:
long temp1 = (long)r->red;
long temp2 = 5 * temp1;
float temp3 = (float) temp2;
aggregate.red += temp3;
Perhaps for non-fast-math it would need to be optimized as in case there are
rounding issues:
long temp1 = (long)r->red;
long temp2 = 5 * temp1;
double temp3 = aggregate.red;
double temp4 = (float) temp2;
double temp5 = temp3 * temp4;
aggregate.red = (float) temp5;
>From gcc-bugs-return-640573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 17:45:56 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90070] Add optimization for optimizing small integer values by fp integral constant
Date: Fri, 12 Apr 2019 17:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90070
Michael Meissner <meissner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64le-gnu-linux,
| |powerpc64-gnu-linux
CC| |dje at gcc dot gnu.org,
| |meissner at gcc dot gnu.org,
| |segher at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
Host| |powerpc64le-gnu-linux,
| |powerpc64-gnu-linux
Build| |powerpc64le-gnu-linux,
| |powerpc64-gnu-linux
--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Obviously this is can speed up various machines, but there might be machines
where this is not optimal.
Now, in the full benchmark, there are many other things going on, but in
looking at the code, I figured this small optimization might help.
>From gcc-bugs-return-640574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 18:16:07 2019
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Subject: [Bug c/90071] New: internal compiler error: SSA corruption
Date: Fri, 12 Apr 2019 18:16:00 -0000
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Bug ID: 90071
Summary: internal compiler error: SSA corruption
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Host: x86_64-linux-gnu
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Created attachment 46154
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46154&action=edit
Preprocessed code of program causing ICE "crash1.c"
-----------------------COMPILER CONFIGURATION---------------------------------
Using built-in specs.
COLLECT_GCC=./xgcc
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --enable-languages=c,c++ --enable-lto
--disable-bootstrap : (reconfigured) ../gcc/configure --enable-languages=c,c++
--enable-lto --disable-bootstrap
Thread model: posix
gcc version 9.0.1 20190412 (experimental) (GCC)
-----------------COMMAND LINE USED FOR COMPILATION-------------------------
~/pull-gcc-9-trunk/build/gcc/xgcc -B ~/pull-gcc-9-trunk/build/gcc/
-I../../runtime/ crash1.c -w -O1
Unable to coalesce ssa_names 571 and 568 which are marked as MUST COALESCE.
p_61_571(ab) and p_61_568(ab)
during RTL pass: expand
crash1.c: In function ‘func_59’:
crash1.c:1696:20: internal compiler error: SSA corruption
1696 | static struct S0 * func_59(uint16_t p_60, uint32_t p_61, uint16_t
p_62)
| ^~~~~~~
0xdc07c1 fail_abnormal_edge_coalesce
../../gcc/gcc/tree-ssa-coalesce.c:1002
0xdc07c1 coalesce_partitions
../../gcc/gcc/tree-ssa-coalesce.c:1424
0xdc07c1 coalesce_ssa_name(_var_map*)
../../gcc/gcc/tree-ssa-coalesce.c:1755
0xd585ab remove_ssa_form
../../gcc/gcc/tree-outof-ssa.c:1029
0xd585ab rewrite_out_of_ssa(ssaexpand*)
../../gcc/gcc/tree-outof-ssa.c:1287
0x7f8700 execute
../../gcc/gcc/cfgexpand.c:6314
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
------------------------REDUCED CODE----------------------------------------
a;
static b;
c() {
int d, e = &&f;
void *g = &&h;
h:
++e;
if (a)
i:
goto *g;
for (;;) {
e = 0;
if (b)
goto i;
}
f:
goto *({ d || e < 0 || e >= 2; });
&e;
}
>From gcc-bugs-return-640575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 18:23:37 2019
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From: "brichardson at structint dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90072] New: Polymorphic Dispatch to Polymophic Return Type Memory Leak
Date: Fri, 12 Apr 2019 18:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90072
Bug ID: 90072
Summary: Polymorphic Dispatch to Polymophic Return Type Memory
Leak
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: brichardson at structint dot com
Target Milestone: ---
It appears that trying to do polymorphic dispatch to a function that has a
polymorphic return type leads to a memory leak. But, by using a select type
construct, the memory leak doesn't occur.
The following program and module demonstrate the problem.
program dispatch_memory_leak
implicit none
call run()
contains
subroutine run()
use types, only: base_returned, base_called, first_extended
class(base_called), allocatable :: to_call
class(base_returned), allocatable :: to_get
allocate(to_call, source = first_extended())
allocate(to_get, source = to_call%get()) ! This is a memory leak
deallocate(to_get)
select type(to_call)
type is (first_extended)
allocate(to_get, source = to_call%get()) ! This got fixed
end select
end subroutine run
end program dispatch_memory_leak
module types
implicit none
type, abstract :: base_returned
end type base_returned
type, extends(base_returned) :: first_returned
end type first_returned
type, extends(base_returned) :: second_returned
end type second_returned
type, abstract :: base_called
contains
procedure(get_), deferred :: get
end type base_called
type, extends(base_called) :: first_extended
contains
procedure :: get => getFirst
end type first_extended
type, extends(base_called) :: second_extended
contains
procedure :: get => getSecond
end type second_extended
abstract interface
function get_(self) result(returned)
import base_called
import base_returned
class(base_called), intent(in) :: self
class(base_returned), allocatable :: returned
end function get_
end interface
contains
function getFirst(self) result(returned)
class(first_extended), intent(in) :: self
class(base_returned), allocatable :: returned
allocate(returned, source = first_returned())
end function getFirst
function getSecond(self) result(returned)
class(second_extended), intent(in) :: self
class(base_returned), allocatable :: returned
allocate(returned, source = second_returned())
end function getSecond
end module types
$ gfortran -c -g types.f90 -o types.o
$ gfortran -c -g dispatch_memory_leak.f90 -o dispatch_memory_leak.o
$ gfortran -g types.o dispatch_memory_leak.o -o dispatch_memory_leak
$ valgrind --leak-check=full ./dispatch_memory_leak
==8261== Memcheck, a memory error detector
==8261== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==8261== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==8261== Command: ./dispatch_memory_leak
==8261==
==8261==
==8261== HEAP SUMMARY:
==8261== in use at exit: 2 bytes in 2 blocks
==8261== total heap usage: 26 allocs, 24 frees, 13,525 bytes allocated
==8261==
==8261== 1 bytes in 1 blocks are definitely lost in loss record 1 of 2
==8261== at 0x483777F: malloc (vg_replace_malloc.c:299)
==8261== by 0x1092EE: __types_MOD_getfirst (types.f90:41)
==8261== by 0x109446: run.3770 (dispatch_memory_leak.f90:13)
==8261== by 0x10973D: MAIN__ (dispatch_memory_leak.f90:4)
==8261== by 0x109789: main (dispatch_memory_leak.f90:4)
==8261==
==8261== 1 bytes in 1 blocks are definitely lost in loss record 2 of 2
==8261== at 0x483777F: malloc (vg_replace_malloc.c:299)
==8261== by 0x1092EE: __types_MOD_getfirst (types.f90:41)
==8261== by 0x10959A: run.3770 (dispatch_memory_leak.f90:18)
==8261== by 0x10973D: MAIN__ (dispatch_memory_leak.f90:4)
==8261== by 0x109789: main (dispatch_memory_leak.f90:4)
==8261==
==8261== LEAK SUMMARY:
==8261== definitely lost: 2 bytes in 2 blocks
==8261== indirectly lost: 0 bytes in 0 blocks
==8261== possibly lost: 0 bytes in 0 blocks
==8261== still reachable: 0 bytes in 0 blocks
==8261== suppressed: 0 bytes in 0 blocks
==8261==
==8261== For counts of detected and suppressed errors, rerun with: -v
==8261== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)
Note that the leak that occurs inside the select type construct here appears to
have been fixed in the version of 9.0 that we are running at work. (That
version is from some time in September).
I'm running the official version from Arch Linux.
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From: "rcc.dark at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/90073] New: Very slow code for AVX2
Date: Fri, 12 Apr 2019 18:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90073
Bug ID: 90073
Summary: Very slow code for AVX2
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: rcc.dark at gmail dot com
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Created attachment 46155
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46155&action=edit
Source code and assembly output
Hi all, the following code generates very poor assembly code for AVX2 targets
(GCC 8.2, 8.3 and trunk; compiler flags -O3 -mavx2).
---
#include <x86intrin.h>
using data = long long __attribute__((vector_size(64)));
void f(data& a, const data& x1, const data& x2) {
a ^= x1 ^ x2;
}
---
GCC generates 128-loads and stores, which leads to STLF stalls. Possibly a
duplicate of https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80689
ICC generates the expected code. I attach GCC and ICC outputs, but you can
check them here https://godbolt.org/z/bwtGUE
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Subject: [Bug middle-end/89797] ICE on a vector_size (1LU << 33) int variable
Date: Fri, 12 Apr 2019 19:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89797
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 19:01:17 2019
New Revision: 270326
URL: https://gcc.gnu.org/viewcvs?rev=270326&root=gcc&view=rev
Log:
PR c/88383 - ICE calling __builtin_has_attribute on a reference
PR c/89288 - ICE in tree_code_size, at tree.c:865
PR c/89798 - excessive vector_size silently accepted and truncated
PR c/89797 - ICE on a vector_size (1LU << 33) int variable
gcc/ChangeLog:
PR c/89797
* targhooks.c (default_vector_alignment): Avoid assuming
argument fits in SHWI.
* tree.h (TYPE_VECTOR_SUBPARTS): Avoid sign overflow in
a shift expression.
* doc/extend.texi (__builtin_has_attribute): Add a clarifying note.
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
gcc/cp/ChangeLog:
PR c/88383
PR c/89288
* parser.c (cp_parser_has_attribute_expression): Handle assignment
expressions.
gcc/testsuite/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-c++-common/attributes-1.c: Adjust.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/builtin-has-attribute-7.c: New test.
* c-c++-common/builtin-has-attribute-4.c: Adjust expectations.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/pr71574.c: Adjust.
* gcc.dg/pr25559.c: Adjust.
* gcc.dg/attr-vector_size.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-6.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-7.c
trunk/gcc/testsuite/gcc.dg/attr-vector_size.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/targhooks.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attributes-1.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-4.c
trunk/gcc/testsuite/c-c++-common/pr71574.c
trunk/gcc/testsuite/gcc.dg/pr25559.c
trunk/gcc/tree.h
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/89798] excessive vector_size silently accepted and truncated
Date: Fri, 12 Apr 2019 19:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89798
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 19:01:17 2019
New Revision: 270326
URL: https://gcc.gnu.org/viewcvs?rev=270326&root=gcc&view=rev
Log:
PR c/88383 - ICE calling __builtin_has_attribute on a reference
PR c/89288 - ICE in tree_code_size, at tree.c:865
PR c/89798 - excessive vector_size silently accepted and truncated
PR c/89797 - ICE on a vector_size (1LU << 33) int variable
gcc/ChangeLog:
PR c/89797
* targhooks.c (default_vector_alignment): Avoid assuming
argument fits in SHWI.
* tree.h (TYPE_VECTOR_SUBPARTS): Avoid sign overflow in
a shift expression.
* doc/extend.texi (__builtin_has_attribute): Add a clarifying note.
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
gcc/cp/ChangeLog:
PR c/88383
PR c/89288
* parser.c (cp_parser_has_attribute_expression): Handle assignment
expressions.
gcc/testsuite/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-c++-common/attributes-1.c: Adjust.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/builtin-has-attribute-7.c: New test.
* c-c++-common/builtin-has-attribute-4.c: Adjust expectations.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/pr71574.c: Adjust.
* gcc.dg/pr25559.c: Adjust.
* gcc.dg/attr-vector_size.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-6.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-7.c
trunk/gcc/testsuite/gcc.dg/attr-vector_size.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/targhooks.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attributes-1.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-4.c
trunk/gcc/testsuite/c-c++-common/pr71574.c
trunk/gcc/testsuite/gcc.dg/pr25559.c
trunk/gcc/tree.h
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/89288] ICE in tree_code_size, at tree.c:865
Date: Fri, 12 Apr 2019 19:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89288
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 19:01:17 2019
New Revision: 270326
URL: https://gcc.gnu.org/viewcvs?rev=270326&root=gcc&view=rev
Log:
PR c/88383 - ICE calling __builtin_has_attribute on a reference
PR c/89288 - ICE in tree_code_size, at tree.c:865
PR c/89798 - excessive vector_size silently accepted and truncated
PR c/89797 - ICE on a vector_size (1LU << 33) int variable
gcc/ChangeLog:
PR c/89797
* targhooks.c (default_vector_alignment): Avoid assuming
argument fits in SHWI.
* tree.h (TYPE_VECTOR_SUBPARTS): Avoid sign overflow in
a shift expression.
* doc/extend.texi (__builtin_has_attribute): Add a clarifying note.
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
gcc/cp/ChangeLog:
PR c/88383
PR c/89288
* parser.c (cp_parser_has_attribute_expression): Handle assignment
expressions.
gcc/testsuite/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-c++-common/attributes-1.c: Adjust.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/builtin-has-attribute-7.c: New test.
* c-c++-common/builtin-has-attribute-4.c: Adjust expectations.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/pr71574.c: Adjust.
* gcc.dg/pr25559.c: Adjust.
* gcc.dg/attr-vector_size.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-6.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-7.c
trunk/gcc/testsuite/gcc.dg/attr-vector_size.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/targhooks.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attributes-1.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-4.c
trunk/gcc/testsuite/c-c++-common/pr71574.c
trunk/gcc/testsuite/gcc.dg/pr25559.c
trunk/gcc/tree.h
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/88383] ICE calling _builtin_has_attribute with an expression
Date: Fri, 12 Apr 2019 19:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88383
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 19:01:17 2019
New Revision: 270326
URL: https://gcc.gnu.org/viewcvs?rev=270326&root=gcc&view=rev
Log:
PR c/88383 - ICE calling __builtin_has_attribute on a reference
PR c/89288 - ICE in tree_code_size, at tree.c:865
PR c/89798 - excessive vector_size silently accepted and truncated
PR c/89797 - ICE on a vector_size (1LU << 33) int variable
gcc/ChangeLog:
PR c/89797
* targhooks.c (default_vector_alignment): Avoid assuming
argument fits in SHWI.
* tree.h (TYPE_VECTOR_SUBPARTS): Avoid sign overflow in
a shift expression.
* doc/extend.texi (__builtin_has_attribute): Add a clarifying note.
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
gcc/cp/ChangeLog:
PR c/88383
PR c/89288
* parser.c (cp_parser_has_attribute_expression): Handle assignment
expressions.
gcc/testsuite/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-c++-common/attributes-1.c: Adjust.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/builtin-has-attribute-7.c: New test.
* c-c++-common/builtin-has-attribute-4.c: Adjust expectations.
* c-c++-common/builtin-has-attribute-6.c: New test.
* c-c++-common/pr71574.c: Adjust.
* gcc.dg/pr25559.c: Adjust.
* gcc.dg/attr-vector_size.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-6.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-7.c
trunk/gcc/testsuite/gcc.dg/attr-vector_size.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/targhooks.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/attributes-1.c
trunk/gcc/testsuite/c-c++-common/builtin-has-attribute-4.c
trunk/gcc/testsuite/c-c++-common/pr71574.c
trunk/gcc/testsuite/gcc.dg/pr25559.c
trunk/gcc/tree.h
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Subject: [Bug middle-end/89288] ICE in tree_code_size, at tree.c:865
Date: Fri, 12 Apr 2019 19:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89288
Bug 89288 depends on bug 88383, which changed state.
Bug 88383 Summary: ICE calling _builtin_has_attribute with an expression
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88383
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug c/88383] ICE calling _builtin_has_attribute with an expression
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r270326.
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Subject: [Bug c/89798] excessive vector_size silently accepted and truncated
Date: Fri, 12 Apr 2019 19:03:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
Target Milestone|--- |9.0
Known to fail| |8.3.0
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r270326.
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Subject: [Bug target/90073] Very slow code for AVX2
Date: Fri, 12 Apr 2019 19:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90073
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
The problem is with the default -mtune=generic.
[hjl@gnu-cfl-1 gcc]$ cat /tmp/foo.cc
#include <x86intrin.h>
using data = long long __attribute__((vector_size(64)));
void f(data& a, const data& x1, const data& x2) {
a ^= x1 ^ x2;
}
[hjl@gnu-cfl-1 gcc]$ ./xgcc -B./ -O3 -mtune=skylake -mavx2 /tmp/foo.cc -S
[hjl@gnu-cfl-1 gcc]$ cat foo.s
.file "foo.cc"
.text
.p2align 4
.globl _Z1fRDv8_xRKS_S2_
.type _Z1fRDv8_xRKS_S2_, @function
_Z1fRDv8_xRKS_S2_:
.LFB5519:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-64, %rsp
subq $200, %rsp
vmovdqa (%rsi), %ymm2
vmovdqa 32(%rsi), %ymm0
vpxor (%rdx), %ymm2, %ymm1
vpxor 32(%rdx), %ymm0, %ymm0
vpxor (%rdi), %ymm1, %ymm1
vpxor 32(%rdi), %ymm0, %ymm0
vmovaps %ymm1, (%rdi)
vmovaps %ymm0, 32(%rdi)
vzeroupper
leave
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE5519:
.size _Z1fRDv8_xRKS_S2_, .-_Z1fRDv8_xRKS_S2_
.ident "GCC: (GNU) 9.0.1 20190412 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 gcc]$
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Subject: [Bug middle-end/89797] ICE on a vector_size (1LU << 33) int variable
Date: Fri, 12 Apr 2019 19:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r270326.
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Subject: [Bug target/90073] Very slow code for AVX2
Date: Fri, 12 Apr 2019 19:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90073
--- Comment #2 from Rodrigo <rcc.dark at gmail dot com> ---
(In reply to H.J. Lu from comment #1)
> The problem is with the default -mtune=generic.
>
> [hjl@gnu-cfl-1 gcc]$ cat /tmp/foo.cc
> #include <x86intrin.h>
>
> using data = long long __attribute__((vector_size(64)));
> void f(data& a, const data& x1, const data& x2) {
> a ^= x1 ^ x2;
> }
> [hjl@gnu-cfl-1 gcc]$ ./xgcc -B./ -O3 -mtune=skylake -mavx2 /tmp/foo.cc -S
>
> [hjl@gnu-cfl-1 gcc]$ cat foo.s
> .file "foo.cc"
> .text
> .p2align 4
> .globl _Z1fRDv8_xRKS_S2_
> .type _Z1fRDv8_xRKS_S2_, @function
> _Z1fRDv8_xRKS_S2_:
> .LFB5519:
> .cfi_startproc
> pushq %rbp
> .cfi_def_cfa_offset 16
> .cfi_offset 6, -16
> movq %rsp, %rbp
> .cfi_def_cfa_register 6
> andq $-64, %rsp
> subq $200, %rsp
> vmovdqa (%rsi), %ymm2
> vmovdqa 32(%rsi), %ymm0
> vpxor (%rdx), %ymm2, %ymm1
> vpxor 32(%rdx), %ymm0, %ymm0
> vpxor (%rdi), %ymm1, %ymm1
> vpxor 32(%rdi), %ymm0, %ymm0
> vmovaps %ymm1, (%rdi)
> vmovaps %ymm0, 32(%rdi)
> vzeroupper
> leave
> .cfi_def_cfa 7, 8
> ret
> .cfi_endproc
> .LFE5519:
> .size _Z1fRDv8_xRKS_S2_, .-_Z1fRDv8_xRKS_S2_
> .ident "GCC: (GNU) 9.0.1 20190412 (experimental)"
> .section .note.GNU-stack,"",@progbits
> [hjl@gnu-cfl-1 gcc]$
Hi! Using -mtune=skylake or -mtune=haswell doesn't fix the problem in my
installation (GCC 8.2, MingW64) or in GodBolt (8.2, 8.3 and trunk). Do you know
why could it be?
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Subject: [Bug target/90073] Very slow code for AVX2
Date: Fri, 12 Apr 2019 19:16:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed on
https://gitlab.com/x86-gcc/wip/tree/usr/hjl/pr89226/master
which will be submitted for GCC 10.
*** This bug has been marked as a duplicate of bug 89226 ***
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Subject: [Bug target/89226] codegen for copying a 512-bit object fails to use avx instructions
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rcc.dark at gmail dot com
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
*** Bug 90073 has been marked as a duplicate of this bug. ***
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Subject: [Bug target/90073] Very slow code for AVX2
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90073
--- Comment #4 from Rodrigo <rcc.dark at gmail dot com> ---
(In reply to H.J. Lu from comment #3)
> Fixed on
>
> https://gitlab.com/x86-gcc/wip/tree/usr/hjl/pr89226/master
>
> which will be submitted for GCC 10.
>
> *** This bug has been marked as a duplicate of bug 89226 ***
Thank you very much.
>From gcc-bugs-return-640590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 19:21:30 2019
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90073] Very slow code for AVX2
Date: Fri, 12 Apr 2019 19:21:00 -0000
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--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> ---
Looking at the attached asm, the main issue is PR 55266 (there should be no
copying), and how exactly the copies are done (64/128/256 bits) is almost a
detail...
>From gcc-bugs-return-640591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 20:07:05 2019
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From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Fri, 12 Apr 2019 20:07:00 -0000
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--- Comment #20 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Wilco from comment #19)
> (In reply to Peter Bergner from comment #18)
> > (In reply to Segher Boessenkool from comment #15)
> > > Popping a5(r116,l0) -- assign reg 3
> > > Popping a3(r112,l0) -- assign reg 4
> > > Popping a2(r114,l0) -- assign reg 3
> > > Popping a0(r111,l0) -- assign reg 0
> > > Popping a4(r117,l0) -- assign reg 0
> > > Popping a1(r113,l0) -- assign reg 2
> > > Assigning 4 to a5r116
> > > Disposition:
> > > 0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
> > > 5:r116 l0 4 4:r117 l0 0
> > >
> > >
> > > r116 does not conflict with *any* other pseudo. It is alive in the first
> > > two insns of the function, which are
> >
> > So we initially assign r3 to r116 presumably because it has the same cost as
> > the other gprs and it occurs first in REG_ALLOC_ORDER. Then
> > improve_allocation() decides that r4 is a better hard reg and switches the
> > assignment to that. I'm not sure why it wouldn't choose r0 there instead.
>
> I would expect that r116 has a strong preference for r0 given the r116 = mov
> r0 and thus allocating r116 to r0 should have the lowest cost by a large
> margin.
p116 conflicts with hr0. Therefore it can not get hr0. p112 is connected with
p116. p112 got hr4 and p116 got 3. Assigning 4 to 116 is profitable.
Therefore assignment of p116 is changed to 4.
The question is why p116 conflicts with hr0. Before RA we have
(insn 50 3 7 2 (set (reg:SI 116)
(reg:SI 0 r0 [ a ]))
"/home/cygnus/vmakarov/build1/trunk/gcc/gcc/testsuite/gcc.dg/ira-shrinkwrap-prep-1.c":11:1
181 {*arm_mo\
vsi_insn}
(nil))
---> No reg-dead r0!
because later we have
call_insn 11 9 51 3 (parallel [
(set (reg:SI 0 r0)
(call (mem:SI (symbol_ref:SI ("foo") [flags 0x41]
<function_decl 0x7f7cc85ac000 foo>) [0 foo S4 A32])
(const_int 0 [0])))
(use (const_int 0 [0]))
(clobber (reg:SI 14 lr))
])
"/home/cygnus/vmakarov/build1/trunk/gcc/gcc/testsuite/gcc.dg/ira-shrinkwrap-prep-1.c":16:11
219 {*call_value_symbol}
(expr_list:REG_CALL_DECL (symbol_ref:SI ("foo") [flags 0x41]
<function_decl 0x7f7cc85ac000 foo>)
(nil))
(expr_list (clobber (reg:SI 12 ip))
(expr_list:SI (use (reg:SI 0 r0))
(nil))))
---> use r0!
>From gcc-bugs-return-640592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 20:20:46 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90071] [7/8/9 Regression] internal compiler error: SSA corruption
Date: Fri, 12 Apr 2019 20:20:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-12
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |7.5
Summary|internal compiler error: |[7/8/9 Regression] internal
|SSA corruption |compiler error: SSA
| |corruption
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
With -O this started with r247495, with -O -fstrict-overflow already with
r229911.
Slightly cleaned up testcase:
int a;
static int b;
void
foo ()
{
int d;
int e = (int) (__INTPTR_TYPE__) &&f;
void *g = &&h;
h: ++e;
if (a)
i: goto *g;
for (;;)
{
e = 0;
if (b)
goto i;
}
f:
goto *({ d || e < 0 || e >= 2; });
&e;
}
>From gcc-bugs-return-640593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 20:38:39 2019
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From: "qrzhang at gatech dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90074] New: wrong debug info at -O3
Date: Fri, 12 Apr 2019 20:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90074
Bug ID: 90074
Summary: wrong debug info at -O3
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Version: unknown
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It's a latent issue which affects 4.8-6, and 8-trunk. Gcc-7 works fine.
It happens at -O3 only. Bisect between gcc-7 and gcc-8 points to r255267.
$ gcc-trunk -v
gcc version 9.0.1 20190412 (experimental) [trunk revision 270309] (GCC)
$ gdb -v
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
## wrong result ##
$ gcc-trunk abc.c outer.c -g -O3
$ gdb -x cmds -batch a.out
Breakpoint 1 at 0x400394: file abc.c, line 12.
Breakpoint 1, main () at abc.c:12
12 optimize_me_not();
$1 = 0
## correct result ##
$ gcc-trunk abc.c outer.c -g
$ gdb -x cmds -batch a.out
Breakpoint 1 at 0x40049f: file abc.c, line 12.
Breakpoint 1, main () at abc.c:12
12 optimize_me_not();
$1 = 7
$ cat abc.c
char a;
short b[7][1];
int main() {
int i, c;
a = 0;
i = 0;
for (; i < 7; i++) {
c = 0;
for (; c < 1; c++)
b[i][c] = 0;
}
optimize_me_not();
}
$ cat outer.c
void optimize_me_not() {}
$ cat cmds
b 12
r
p i
kill
q
>From gcc-bugs-return-640594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 20:56:11 2019
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From: "jjhelmus at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90075] New: [AArch64] ICE during RTL pass when member of union passed to copysignf
Date: Fri, 12 Apr 2019 20:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90075
Bug ID: 90075
Summary: [AArch64] ICE during RTL pass when member of union
passed to copysignf
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jjhelmus at gmail dot com
Target Milestone: ---
Created attachment 46156
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46156&action=edit
preprocessed source of code mentioned in report
GCC 8.3.0 as well as other releases in the 8.x and 7.x line fail with an
internal compiler error when compiling the following example with -fPIC and
optimization enabled.
#include <math.h>
typedef struct { float one, two; } twofloats;
float
bug(twofloats tf)
{
float f1, f2;
union {
twofloats tfloats;
float arr[2];
} utfloats;
utfloats.tfloats = tf;
f1 = utfloats.arr[1];
f2 = copysignf(0, f1);
return f2;
}
Using the gcc 8.3.0 docker image on a AArch64 system (RockChip rk3399) running
Ubunutu 18.04 produces the following results:
root@37bc4cc2fc49:/io# gcc --version
gcc (GCC) 8.3.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
root@37bc4cc2fc49:/io# gcc -Wall -Wextra -O1 -fPIC -c mre.c
during RTL pass: expand
mre.c: In function 'bug':
mre.c:15:10: internal compiler error: Segmentation fault
f2 = copysignf(0, f1);
^~~~~~~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Removing the -O1 or -fPIC arguments allow for successful compilation.
The preprocessed source is attached.
This issue was initially detected while attempting to build NumPy 1.16.3, a
popular Python library for Numerical computation, for AArch64,
https://github.com/conda-forge/numpy-feedstock/pull/138.
>From gcc-bugs-return-640595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 12 20:58:26 2019
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From: "brichardson at structint dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90076] New: Polymorphic Allocate on Assignment Memory Leak
Date: Fri, 12 Apr 2019 20:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90076
Bug ID: 90076
Summary: Polymorphic Allocate on Assignment Memory Leak
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: brichardson at structint dot com
Target Milestone: ---
Allocate on assignment for polymorphic scalars causes a memory leak. The
following program and execution demonstrates the problem.
program assignment_memory_leak
implicit none
type, abstract :: base
end type base
type, extends(base) :: extended
end type extended
call run()
contains
subroutine run()
class(base), allocatable :: var
allocate(var, source = newVar())
var = newVar() ! This is a memory leak
end subroutine run
function newVar()
class(base), allocatable :: newVar
allocate(newVar, source = extended())
end function newVar
end program assignment_memory_leak
$ gfortran -g assignment_memory_leak.f90 -o assignment_memory_leak
$ valgrind --leak-check=full ./assignment_memory_leak
==10130== Memcheck, a memory error detector
==10130== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==10130== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==10130== Command: ./assignment_memory_leak
==10130==
==10130==
==10130== HEAP SUMMARY:
==10130== in use at exit: 2 bytes in 2 blocks
==10130== total heap usage: 24 allocs, 22 frees, 13,523 bytes allocated
==10130==
==10130== 1 bytes in 1 blocks are definitely lost in loss record 1 of 2
==10130== at 0x483777F: malloc (vg_replace_malloc.c:299)
==10130== by 0x109241: newvar.3789 (assignment_memory_leak.f90:22)
==10130== by 0x1092D9: run.3791 (assignment_memory_leak.f90:15)
==10130== by 0x1091D6: MAIN__ (assignment_memory_leak.f90:10)
==10130== by 0x10947F: main (assignment_memory_leak.f90:10)
==10130==
==10130== 1 bytes in 1 blocks are definitely lost in loss record 2 of 2
==10130== at 0x483777F: malloc (vg_replace_malloc.c:299)
==10130== by 0x109241: newvar.3789 (assignment_memory_leak.f90:22)
==10130== by 0x10936B: run.3791 (assignment_memory_leak.f90:16)
==10130== by 0x1091D6: MAIN__ (assignment_memory_leak.f90:10)
==10130== by 0x10947F: main (assignment_memory_leak.f90:10)
==10130==
==10130== LEAK SUMMARY:
==10130== definitely lost: 2 bytes in 2 blocks
==10130== indirectly lost: 0 bytes in 0 blocks
==10130== possibly lost: 0 bytes in 0 blocks
==10130== still reachable: 0 bytes in 0 blocks
==10130== suppressed: 0 bytes in 0 blocks
==10130==
==10130== For counts of detected and suppressed errors, rerun with: -v
==10130== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)
Note that using a version of 9.0 from September that we use at work, the
explicit allocate doesn't generate a memory leak, so I'm not worried about that
for this bug report.
Additionally, If I make the newVar function return the concrete type, I don't
get any memory leaks.
program assignment_memory_leak
implicit none
type, abstract :: base
end type base
type, extends(base) :: extended
end type extended
call run()
contains
subroutine run()
class(base), allocatable :: var
allocate(var, source = newVar())
var = newVar() ! This is fine now
end subroutine run
function newVar()
type(extended) :: newVar
end function newVar
end program assignment_memory_leak
$ gfortran -g assignment_memory_leak.f90 -o assignment_memory_leak
$ valgrind --leak-check=full ./assignment_memory_leak
==10176== Memcheck, a memory error detector
==10176== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==10176== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==10176== Command: ./assignment_memory_leak
==10176==
==10176==
==10176== HEAP SUMMARY:
==10176== in use at exit: 0 bytes in 0 blocks
==10176== total heap usage: 22 allocs, 22 frees, 13,521 bytes allocated
==10176==
==10176== All heap blocks were freed -- no leaks are possible
==10176==
==10176== For counts of detected and suppressed errors, rerun with: -v
==10176== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
But if I remove the allocate statement, the compiler segfaults.
program assignment_memory_leak
implicit none
type, abstract :: base
end type base
type, extends(base) :: extended
end type extended
call run()
contains
subroutine run()
class(base), allocatable :: var
var = newVar() ! This segfaults the compiler
end subroutine run
function newVar()
type(extended) :: newVar
end function newVar
end program assignment_memory_leak
$ gfortran -g assignment_memory_leak.f90 -o assignment_memory_leak
assignment_memory_leak.f90:15:0:
var = newVar() ! This segfaults the compiler
internal compiler error: in build_function_decl, at fortran/trans-decl.c:2238
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
Those behaviors are the same for the version of 9.0 I use at work.
I used the official version for Arch Linux to generate all of the above.
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Fri, 12 Apr 2019 21:02:00 -0000
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--- Comment #21 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Vladimir Makarov from comment #20)
> (In reply to Wilco from comment #19)
> > (In reply to Peter Bergner from comment #18)
> > > (In reply to Segher Boessenkool from comment #15)
> > > > Popping a5(r116,l0) -- assign reg 3
> > > > Popping a3(r112,l0) -- assign reg 4
> > > > Popping a2(r114,l0) -- assign reg 3
> > > > Popping a0(r111,l0) -- assign reg 0
> > > > Popping a4(r117,l0) -- assign reg 0
> > > > Popping a1(r113,l0) -- assign reg 2
> > > > Assigning 4 to a5r116
> > > > Disposition:
> > > > 0:r111 l0 0 3:r112 l0 4 1:r113 l0 2 2:r114 l0 3
> > > > 5:r116 l0 4 4:r117 l0 0
> > > >
> > > >
> > > > r116 does not conflict with *any* other pseudo. It is alive in the first
> > > > two insns of the function, which are
> > >
> > > So we initially assign r3 to r116 presumably because it has the same cost as
> > > the other gprs and it occurs first in REG_ALLOC_ORDER. Then
> > > improve_allocation() decides that r4 is a better hard reg and switches the
> > > assignment to that. I'm not sure why it wouldn't choose r0 there instead.
> >
> > I would expect that r116 has a strong preference for r0 given the r116 = mov
> > r0 and thus allocating r116 to r0 should have the lowest cost by a large
> > margin.
>
> p116 conflicts with hr0. Therefore it can not get hr0. p112 is connected
> with p116. p112 got hr4 and p116 got 3. Assigning 4 to 116 is profitable.
> Therefore assignment of p116 is changed to 4.
>
> The question is why p116 conflicts with hr0. Before RA we have
That's a bug since register copies should not create a conflict. It's one of
the most basic optimization of register allocator.
And there is also the question why we do move r0 into a virtual register but
not assign the virtual register to an argument register.
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Subject: [Bug c++/82081] Tail call optimisation of noexcept function leads to exception allowed through
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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Subject: [Bug c++/82081] Tail call optimisation of noexcept function leads to exception allowed through
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--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
Created attachment 46157
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46157&action=edit
fix
Here's a patch. I'm not sure if it will go into GCC 9 or 10.
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Subject: [Bug c/89933] [7/8/9 Regression] ICE in merge_decls, at c/c-decl.c:2517
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 12 21:45:54 2019
New Revision: 270329
URL: https://gcc.gnu.org/viewcvs?rev=270329&root=gcc&view=rev
Log:
PR c/89933
c/
* c-decl.c (merge_decls): When newdecl's type is its main variant,
don't try to remove it from the variant list, but instead assert
it has no variants.
cp/
* decl.c (duplicate_decls): When newdecl's type is its main variant,
don't try to remove it from the variant list, but instead assert
it has no variants.
testsuite/
* c-c++-common/pr89933.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr89933.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/89933] [7/8 Regression] ICE in merge_decls, at c/c-decl.c:2517
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] ICE in |[7/8 Regression] ICE in
|merge_decls, at |merge_decls, at
|c/c-decl.c:2517 |c/c-decl.c:2517
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug middle-end/89797] ICE on a vector_size (1LU << 33) int variable
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 22:37:12 2019
New Revision: 270331
URL: https://gcc.gnu.org/viewcvs?rev=270331&root=gcc&view=rev
Log:
Commit a change missed in r270326:
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
Modified:
trunk/gcc/c-family/c-attribs.c
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Subject: [Bug c/89798] excessive vector_size silently accepted and truncated
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 22:37:12 2019
New Revision: 270331
URL: https://gcc.gnu.org/viewcvs?rev=270331&root=gcc&view=rev
Log:
Commit a change missed in r270326:
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
Modified:
trunk/gcc/c-family/c-attribs.c
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Subject: [Bug c/88383] ICE calling _builtin_has_attribute with an expression
Date: Fri, 12 Apr 2019 22:37:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 22:37:12 2019
New Revision: 270331
URL: https://gcc.gnu.org/viewcvs?rev=270331&root=gcc&view=rev
Log:
Commit a change missed in r270326:
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
Modified:
trunk/gcc/c-family/c-attribs.c
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Subject: [Bug middle-end/89288] ICE in tree_code_size, at tree.c:865
Date: Fri, 12 Apr 2019 22:37:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Apr 12 22:37:12 2019
New Revision: 270331
URL: https://gcc.gnu.org/viewcvs?rev=270331&root=gcc&view=rev
Log:
Commit a change missed in r270326:
gcc/c-family/ChangeLog:
PR c/88383
PR c/89288
PR c/89798
PR c/89797
* c-attribs.c (type_valid_for_vector_size): Detect excessively
large sizes.
(validate_attribute): Handle DECLs and expressions.
(has_attribute): Handle types referenced by expressions.
Avoid considering array attributes in ARRAY_REF expressions .
Modified:
trunk/gcc/c-family/c-attribs.c
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Fri, 12 Apr 2019 23:02:00 -0000
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--- Comment #22 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Wilco from comment #21)
> (In reply to Vladimir Makarov from comment #20)
>> The question is why p116 conflicts with hr0. Before RA we have
>
> That's a bug since register copies should not create a conflict. It's one of
> the most basic optimization of register allocator.
>
> And there is also the question why we do move r0 into a virtual register but
> not assign the virtual register to an argument register.
We don't since my patch adding that support in current trunk. That said, if
non_conflicting_reg_copy_p() returns NULL_RTX for that r116=r0 copy insn, then
they will conflict. So what does non_conflicting_reg_copy_p() return? ...and
if it says they conflict, why? The insn has side effects or SImode is a
register pair on arm or ???
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Subject: [Bug middle-end/90070] Add optimization for optimizing small integer values by fp integral constant
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-12
Ever confirmed|0 |1
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Another way to do it is as an FMA in float mode, which should be faster
everywhere (everywhere that has FMA). Current GCC doesn't do that either,
not if you write 5* (it does a mulli), nor if you write 5.0* (it does the
calculation in double precision, and rounds to single precision afterwards;
it would give the exact same result if it did the calculation in single
precision directly, afaics, bot when using FMA and when not).
Confirmed.
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #23 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It says (I added some debug)
Insn 50(l0): point = 27
ignoring for conflicts:
(reg:SI 0 r0 [ a ])
but non_conflicting_reg_copy_p isn't called at all where it is improving
the allocation
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #24 from Peter Bergner <bergner at gcc dot gnu.org> ---
So improve_allocation() initially looks at using r0, but disregards it because
check_hard_reg_p() returns false for r0, and that is because we fail this test:
/* Checking only profitable hard regs. */
if (! TEST_HARD_REG_BIT (profitable_regs, hard_regno))
return false;
I don't know why r0 isn't in profitable_regs for pseudo 116.
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Subject: [Bug c/90077] New: musl has no multlib support
Date: Sat, 13 Apr 2019 01:52:00 -0000
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Bug ID: 90077
Summary: musl has no multlib support
Product: gcc
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Created attachment 46158
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46158&action=edit
MULTILIB_OSDIRNAMES := for musl only
There is no support for multlib on musl and upstream musl does not have any
intentions to support anything other then lib gcc should respect that.
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Subject: [Bug c/90077] musl has no multlib support
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Jory A. Pratt <anarchy at gentoo dot org> changed:
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is obsolete| |
--- Comment #1 from Jory A. Pratt <anarchy at gentoo dot org> ---
Created attachment 46159
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musl has no multlib support and should use lib only
Update From: for original author. Do not want to take credit for his work.
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
We currently generate (for -O2 -m64, -O3 unrolls it completely, see comment 7)
li 9,8
mtctr 9
.p2align 4,,15
.L2:
stfs 1,0(3)
addi 3,3,4
bdnz .L2
blr
and for -m32 we get
li 9,8
addi 3,3,-4
mtctr 9
.p2align 4,,15
.L2:
stfsu 1,4(3)
bdnz .L2
blr
The difference is partly the selected -mcpu=, but that doesn't explain it
completely.
The gimple passes (probably ivopts) have decided to do a pre_inc here; all
differences are at RTL level. Except for -mcpu=power9 they didn't.
A case where it works as expected, -O2 -m32 -mcpu=power4, the auto_inc_dec
pass does not help (this is caused by rtx_cost issues):
starting bb 3
11: [r122:SI]=r127:SF
11: [r122:SI]=r127:SF
found mem(11) *(r[122]+0)
10: r122:SI=r122:SI+0x4
10: r122:SI=r122:SI+0x4
found pre inc(10) r[122]+=4
11: [r122:SI]=r127:SF
found mem(11) *(r[122]+0)
trying SIMPLE_PRE_INC
cost failure old=16 new=408
(I have a patch for that).
but then combine comes along and does
Trying 10 -> 11:
10: r122:SI=r122:SI+0x4
11: [r122:SI]=r127:SF
Successfully matched this instruction:
(parallel [
(set (mem:SF (plus:SI (reg:SI 122 [ ivtmp.10 ])
(const_int 4 [0x4])) [1 MEM[base: _17, offset: 0B]+0 S4
A32])
(reg/v:SF 127 [ d ]))
(set (reg:SI 122 [ ivtmp.10 ])
(plus:SI (reg:SI 122 [ ivtmp.10 ])
(const_int 4 [0x4])))
])
allowing combination of insns 10 and 11
original costs 4 + 4 = 8
replacement cost 4
-m64 however says
Trying 10 -> 11:
10: r122:DI=r122:DI+0x4
11: [r122:DI]=r127:SF
Failed to match this instruction:
(parallel [
(set (mem:SF (plus:DI (reg:DI 122 [ ivtmp.11 ])
(const_int 4 [0x4])) [1 MEM[base: _17, offset: 0B]+0 S4
A32])
(reg/v:SF 127 [ d ]))
(set (reg:DI 122 [ ivtmp.11 ])
(plus:DI (reg:DI 122 [ ivtmp.11 ])
(const_int 4 [0x4])))
])
Oh dear, we do not have the float load/store-with-update instructions for -m64.
On all modern 64-bit CPUs these are cracked, so they execute the same as the
separate addi and store instructions, but it costs code space. And if we do
not want them we should make them more expensive, not just pretend the insns
do not exist :-)
>From gcc-bugs-return-640612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 03:59:42 2019
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From: "wlandry at caltech dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90078] New: ICE with deep templates caused by overflow [PATCH]
Date: Sat, 13 Apr 2019 03:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90078
Bug ID: 90078
Summary: ICE with deep templates caused by overflow [PATCH]
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: wlandry at caltech dot edu
Target Milestone: ---
Created attachment 46160
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46160&action=edit
Failing test case
Compiling the attached code with
g++ -O2 ftensorShowcase.cpp -c -ftemplate-depth=1000000
fails with the internal compiler error below. Using godbolt, it seems that
this bug started in gcc 7.1 and is still present in trunk.
In gcc/tree-ssa-loop-ivopts.c, there is a cost struct that has a concept of
infinity. For very deep, recursive templates, the cost can get larger than
'infinity' (10000000). The diff below against trunk implements saturating
arithmetic. It seems to work.
Thanks.
==============================================
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c
index a2b6b2b2312..a89782b13d0 100644
--- a/gcc/tree-ssa-loop-ivopts.c
+++ b/gcc/tree-ssa-loop-ivopts.c
@@ -276,7 +276,11 @@ comp_cost::operator+= (HOST_WIDE_INT c)
if (infinite_cost_p ())
return *this;
- this->cost += c;
+ /* Switch around comparison to avoid overflow */
+ if (c > infinite_cost.cost - this->cost)
+ this->cost = infinite_cost.cost;
+ else
+ this->cost += c;
return *this;
}
@@ -287,7 +291,11 @@ comp_cost::operator-= (HOST_WIDE_INT c)
if (infinite_cost_p ())
return *this;
- this->cost -= c;
+ /* Switch around comparison to avoid overflow */
+ if (c < -infinite_cost.cost + this->cost )
+ this->cost = infinite_cost.cost;
+ else
+ this->cost -= c;
return *this;
}
@@ -298,7 +306,10 @@ comp_cost::operator/= (HOST_WIDE_INT c)
if (infinite_cost_p ())
return *this;
- this->cost /= c;
+ if (c == 0)
+ this->cost = infinite_cost.cost;
+ else
+ this->cost /= c;
return *this;
}
@@ -309,7 +320,11 @@ comp_cost::operator*= (HOST_WIDE_INT c)
if (infinite_cost_p ())
return *this;
- this->cost *= c;
+ /* Switch around comparison to avoid overflow */
+ if (c > infinite_cost.cost / this->cost )
+ this->cost = infinite_cost.cost;
+ else
+ this->cost *= c;
return *this;
}
==============================================
during GIMPLE pass: ivopts
ftensorShowcase.cpp: In member function ‘auto& Tensor4_Expr<Tensor4<A, Dim0,
Dim1, Dim2, Dim3>, T, Dim0, Dim1, Dim2, Dim3, i, j, k, l>::operator=(const
Tensor4_Expr<B, U, Dim1_0, Dim1_1, Dim1_2, Dim1_3, i_1, j_1, k_1, l_1>&) [with
B = Tensor3_times_Tensor3_21<const Tensor3<float, 100, 100, 1000>, const
Tensor3<float, 1000, 100, 100>, float, float, 100, 100, 1000, 100, 100, 'l',
'm', 'k', 'n', 'o'>; U = float; int Dim1_0 = 100; int Dim1_1 = 100; int Dim1_2
= 100; int Dim1_3 = 100; char i_1 = 'l'; char j_1 = 'm'; char k_1 = 'n'; char
l_1 = 'o'; A = float; T = float; int Dim0 = 100; int Dim1 = 100; int Dim2 =
100; int Dim3 = 100; char i = 'l'; char j = 'm'; char k = 'n'; char l = 'o']’:
ftensorShowcase.cpp:170:9: internal compiler error: in try_improve_iv_set, at
tree-ssa-loop-ivopts.c:6667
auto &operator=(const Tensor4_Expr<B, U, Dim1_0, Dim1_1, Dim1_2, Dim1_3,
i_1,
^~~~~~~~
0x7f878289509a __libc_start_main
../csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
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Subject: [Bug libstdc++/90050] std::filesystem::path segfault in destructor
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90050
--- Comment #2 from Mihai Preda <mpreda at gmail dot com> ---
Adding -lstdc++fs fixes the problem with g++ 8.3
g++-9 does not segfault even without -lstdc++fs
g++-9 --version
g++-9 (Ubuntu 9-20190402-1ubuntu1) 9.0.1 20190402 (experimental) [trunk
revision 270074]
>From gcc-bugs-return-640614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 08:10:39 2019
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Subject: [Bug libstdc++/90050] std::filesystem::path segfault in destructor
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Frédéric Bron <ufospoke at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ufospoke at gmail dot com
--- Comment #3 from Frédéric Bron <ufospoke at gmail dot com> ---
I just tried with g++ (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2) on Fedora and it
works well. But to be able to link, I had to add -lstdc++fs.
>From gcc-bugs-return-640615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 08:27:27 2019
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/90076] Polymorphic Allocate on Assignment Memory Leak
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-13
CC| |pault at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=90068,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=90069,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=90072
Blocks| |86754
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed for GCC7 up to trunk (9.0). Assignment to an allocatable polymorphic
variable is not supported on earlier versions.
As for pr90069, pr90072 one memory leak is fixed by revision r263916.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86754
[Bug 86754] [meta-bug] Memory leaks at run time
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Subject: [Bug d/90079] SEGV in _aaKeys, _aaValues on 32-bit SPARC
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
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Subject: [Bug d/90079] New: SEGV in _aaKeys, _aaValues on 32-bit SPARC
Date: Sat, 13 Apr 2019 08:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90079
Bug ID: 90079
Summary: SEGV in _aaKeys, _aaValues on 32-bit SPARC
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-*-*
Created attachment 46161
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46161&action=edit
Trial patch
All aa tests currently SEGV on 32-bit Solaris/SPARC, e.g.
FAIL: libphobos.aa/test_aa.d execution test
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0x0009c9b0 in rt.aaA.Impl.length() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/aaA.d:87
87 assert(used >= deleted);
(gdb) where
#0 0x0009c9b0 in rt.aaA.Impl.length() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/aaA.d:87
#1 0x0009c960 in rt.aaA.AA.empty() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/aaA.d:44
#2 0x0009e83c in _aaValues (aa=..., keysz=4, valsz=1,
tiValueArray=0x718fc <initializer for
TypeInfo_AS7test_aa15testKeysValues1FZ1T>) at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/aaA.d:513
#3 0x00082688 in object.values!(test_aa.testKeysValues1().T[int],
test_aa.testKeysValues1().T, int).values(test_aa.testKeysValues1().T[int])
(aa=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:2171
#4 0x00077a9c in test_aa.testKeysValues1() ()
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/libphobos.aa/test_aa.d:56
#5 0x00077604 in D main ()
at
/vol/gcc/src/hg/trunk/solaris/libphobos/testsuite/libphobos.aa/test_aa.d:3
1: x/i $pc
=> 0x9c9b0 <_D2rt3aaA4Impl6lengthMxFNaNbNdNiZk+32>: ld [ %g1 + 8 ], %g2
(gdb) p/x $g1
$1 = 0x8
(gdb) up
#1 0x0009c960 in rt.aaA.AA.empty() const (this=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/aaA.d:44
44 return impl is null || !impl.length;
(gdb) p impl
$2 = (rt.aaA.Impl *) 0x8
(gdb) up
#2 0x0009e864 in _aaValues (aa=..., keysz=4, valsz=1,
tiValueArray=0x718fc <initializer for
TypeInfo_AS7test_aa15testKeysValues1FZ1T>) at
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/rt/aaA.d:513
513 if (aa.empty)
(gdb) p aa
$2 = {impl = 0x8}
(gdb) up
#3 0x000826b0 in object.values!(test_aa.testKeysValues1().T[int],
test_aa.testKeysValues1().T, int).values(test_aa.testKeysValues1().T[int])
(aa=...)
at /vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/object.d:2171
2171 auto a = cast(void[])_aaValues(cast(inout(void)*)aa, Key.sizeof,
Value.sizeof, typeid(Value[]));
(gdb) p aa
$3 = {ptr = 0xfef11000}
Closer investigation reveals object.d calls _aaValues (and _aaKeys)
incorrectly:
While the implementation expects a struct AA
libdruntime/rt/aaA.d:extern (C) inout(void[]) _aaValues(inout AA aa, in size_t
keysz, in size_t valsz,
the call passes a void * instead:
libdruntime/object.d: inout(void)[] _aaValues(inout void* p, in size_t
keysize, in size_t valuesize, const TypeInfo tiValArray) pure nothrow;
libdruntime/object.d: auto a = cast(void[])_aaValues(cast(inout(void)*)aa,
Key.sizeof, Value.sizeof, typeid(Value[]));
The problem is that on 32-bit SPARC small structs are passed by reference, so
there's a mismatch between caller and callee.
On 64-bit SPARC instead, they are passed by value, so the mismatch doesn't
matter and the tests PASS.
So far, I've not yet managed to figure out the correct way to fix this, though:
while the attached patch allows libdruntime to compile, test_aa.d fails:
libdruntime/object.d:2172: error: cannot cast expression aa of type T[int] to
inout(AA)
testsuite/libphobos.aa/test_aa.d:56: error: template instance
object.values!(T[int], T, int) error instantiating
libdruntime/object.d:2150: error: cannot cast expression aa of type int[T] to
inout(AA)
testsuite/libphobos.aa/test_aa.d:66: error: template instance
object.keys!(int[T], int, T) error instantiating
libdruntime/object.d:2150: error: cannot cast expression aa of type int[string]
to inout(AA)
testsuite/libphobos.aa/test_aa.d:75: error: template instance
object.keys!(int[string], int, string) error instantiating
libdruntime/object.d:2172: error: cannot cast expression aa of type int[string]
to inout(AA)
>From gcc-bugs-return-640618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 09:25:38 2019
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Subject: [Bug fortran/90068] Array Constructor Containing Function Call Leaks Memory
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-13
Blocks| |86754
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from at least 4.7 up to trunk (9.0).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86754
[Bug 86754] [meta-bug] Memory leaks at run time
>From gcc-bugs-return-640619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 09:28:26 2019
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Subject: [Bug d/90079] SEGV in _aaKeys, _aaValues on 32-bit SPARC
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--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Maybe we should be setting TRANSPARENT_AGGR_P afterall, then fixing the
internal signatures in rt.aaA to accept a void*.
>From gcc-bugs-return-640620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 09:31:06 2019
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Subject: [Bug d/90079] SEGV in _aaKeys, _aaValues on 32-bit SPARC
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--- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 46162
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46162&action=edit
Working patch
This patch not only compiles, but gives way better results. I need to analyze
them in detail, but it seems that most of the remaining failures are either
generic Solaris issues that also exist on Solaris/x86 or big-endian problems
also seen, e.g., on S/390.
>From gcc-bugs-return-640621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 09:41:29 2019
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Subject: [Bug fortran/90072] Polymorphic Dispatch to Polymophic Return Type Memory Leak
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-13
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=89890,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=90069
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from at least 4.8 up to trunk (9.0). Related to/duplicate of pr89890.
As for pr90069, pr90076 one memory leak is fixed by revision r263916.
>From gcc-bugs-return-640622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 09:53:40 2019
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Subject: [Bug fortran/90069] Polymorphic Return Type Memory Leak Without Intermediate Variable
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from at least 4.8 up to trunk (9.0). Why is it not a duplicate of
pr90072?
>From gcc-bugs-return-640623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 10:35:30 2019
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Subject: [Bug c++/90080] New: SFINAE failure with static_cast
Date: Sat, 13 Apr 2019 10:35:00 -0000
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Bug ID: 90080
Summary: SFINAE failure with static_cast
Product: gcc
Version: 8.3.1
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Using `std::enable_if` with a trait checking for `static_castable` fails hard
instead of SFINAE and usage of the alternative signature.
Code (https://godbolt.org/z/2uJc3P):
template<typename T, typename U, typename = U>
struct is_static_castable : std::false_type
{};
template<typename T, typename U>
struct is_static_castable<T, U, decltype(static_cast<U>(std::declval<T>()))> :
std::true_type
{};
template<typename To, typename From, std::enable_if_t<is_static_castable<From*,
To*>::value, int> = 0>
auto safePtrCast(From* from)
{
return static_cast<To*>(from);
}
template<typename To, typename From,
std::enable_if_t<!is_static_castable<From*, To*>::value, int> = 0>
To* safePtrCast(From* from)
{
return dynamic_cast<To*>(from);
}
struct BarBase{ virtual ~BarBase() = default;};
struct Bar : virtual BarBase{};
void foo(){
BarBase* b;
Bar* b2 = safePtrCast<Bar>(b);
}
Error:
source>: In instantiation of 'struct is_static_castable<BarBase*, Bar*, Bar*>':
<source>:17:55: required by substitution of 'template<class To, class From,
typename std::enable_if<(! is_static_castable<From*, To*>::value), int>::type
<anonymous> > To* safePtrCast(From*) [with To = Bar; From = BarBase; typename
std::enable_if<(! is_static_castable<From*, To*>::value), int>::type
<anonymous> = <missing>]'
<source>:28:33: required from here
<source>:8:42: error: cannot convert from pointer to base class 'BarBase' to
pointer to derived class 'Bar' because the base is virtual
struct is_static_castable<T, U, decltype(static_cast<U>(std::declval<T>()))> :
std::true_type
This looks like a regression as a similar error is described here
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44267
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Subject: [Bug tree-optimization/90020] [7/8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
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--- Comment #14 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test gcc.dg/torture/pr90020.c fails on darwin:
Undefined symbols for architecture x86_64:
"_x", referenced from:
_main in ccemobuO.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
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From: "dominiq at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/79842] i18n: subword translation in "Can't use the same %smodule"
Date: Sat, 13 Apr 2019 11:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79842
--- Comment #6 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Sat Apr 13 11:32:49 2019
New Revision: 270338
URL: https://gcc.gnu.org/viewcvs?rev=270338&root=gcc&view=rev
Log:
2019-04-13 Dominique d'Humieres <dominiq@gcc.gnu.org>
PR fortran/79842
* module.c (gfc_use_module): use complete sentences.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/module.c
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Subject: [Bug fortran/84487] [8/9 Regression] Large rodate section increase in 465.tonto with r254427
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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Subject: [Bug translation/40883] [meta-bug] Translation breakage with trivial fixes
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Bug 40883 depends on bug 79842, which changed state.
Bug 79842 Summary: i18n: subword translation in "Can't use the same %smodule"
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79842
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----------------------------------------------------------------------------
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Subject: [Bug fortran/79842] i18n: subword translation in "Can't use the same %smodule"
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Closing. It would be nice if someone commits tests covering the errors.
>From gcc-bugs-return-640629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 13:54:48 2019
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Subject: [Bug middle-end/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Sat, 13 Apr 2019 13:54:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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CC| |law at redhat dot com
--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
Right. This is a good example of where extracting the predicate analysis bits
from tree-ssa-uninit.c would be useful elsewhere.
The isolate-erroneous-paths bits don't help either because the dereference
isn't in the same block as the PHI with the NULL argument (educated guess here)
I'm a little surprised DOM jump threading didn't bb11->bb41 to bb31 though.
>From gcc-bugs-return-640630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 14:11:19 2019
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/90079] SEGV in _aaKeys, _aaValues on 32-bit SPARC
Date: Sat, 13 Apr 2019 14:11:00 -0000
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--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
> This patch not only compiles, but gives way better results. I need to analyze
> them in detail, but it seems that most of the remaining failures are either
> generic Solaris issues that also exist on Solaris/x86 or big-endian problems
> also seen, e.g., on S/390.
When looking at 32-bit vs. 64-bit sparc differences, I found a couple of
tests that FAIL due to two other instances of the same problem: _aaClear
and _aaRange. Will look for fixes later.
>From gcc-bugs-return-640631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 14:36:00 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Sat, 13 Apr 2019 14:36:00 -0000
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--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
Since all AVX512BW processors also have AVX512DQ and AVX512VL, we shouldn't
optimize a function with just AVX512BW, but without AVX512DQ and AVX512VL.
We should add -misa=AVX512-subset to enable a subset of AVX512XX:
1. PTA_AVX512 = PTA_AVX512F | PTA_AVX512CD
2. PTA_AVX512SKYLAKE = PTA_AVX512 | PTA_AVX512VL | PTA_AVX512BW | PTA_AVX512DQ
....
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #46 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Apr 13 15:20:46 2019
New Revision: 270339
URL: https://gcc.gnu.org/viewcvs?rev=270339&root=gcc&view=rev
Log:
PR target/89093
* config/arm/arm.c (arm_valid_target_attribute_rec): Use strcmp
instead of strncmp when checking for thumb and arm. Formatting fixes.
* gcc.target/arm/pr89093.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/arm/pr89093.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 16:26:47 2019
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Subject: [Bug c++/65799] Allows constexpr conversion from cv void * to other type
Date: Sat, 13 Apr 2019 16:26:00 -0000
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Eric Fiselier <eric at efcs dot ca> changed:
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--- Comment #4 from Eric Fiselier <eric at efcs dot ca> ---
Hi Jonathan,
Can you re-open this bug? GCC still accepts a number of conversions from void
that it shouldn't.
// g++ -std=c++2a
float dummy = {};
static_assert((int*)(void*)&dummy);
https://godbolt.org/z/_DtmUc
>From gcc-bugs-return-640634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 17:09:57 2019
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Subject: [Bug d/88039] gdc.test/compilable/ddoc12.d FAILs
Date: Sat, 13 Apr 2019 17:09:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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--- Comment #9 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
This should have been resolved in r266933, however I don't have the ability to
close.
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Subject: [Bug d/89177] unaligned memory access in libphobos
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Serge Belyshev <belyshev at depni dot sinp.msu.ru> changed:
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--- Comment #8 from Serge Belyshev <belyshev at depni dot sinp.msu.ru> ---
Fixed in trunk.
>From gcc-bugs-return-640637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 18:06:02 2019
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Subject: [Bug d/88039] gdc.test/compilable/ddoc12.d FAILs
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ibuclaw at gcc dot gnu.org changed:
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--- Comment #10 from ibuclaw at gcc dot gnu.org ---
Fixed in r266933.
>From gcc-bugs-return-640638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 18:20:19 2019
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Subject: [Bug d/90060] libphobos.druntime_shared/core/thread.d FAILs on Solaris/SPARC
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--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Comment on attachment 46150
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46150
Use __makecontext_v2 on Solaris/SPARC
>+ version (makecontextv2)
>+ pragma(mangle, "__makecontext_v2") void makecontext(ucontext_t*, void function(), int, ...);
>+ else
>+ void makecontext(ucontext_t*, void function(), int, ...);
I would use alias here instead of pragma(mangle).
void __makecontext_v2(ucontext_t*, void function(), int, ...);
alias makecontext = __makecontext_v2;
Both do the same thing however...
>From gcc-bugs-return-640639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 18:44:02 2019
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Subject: [Bug d/90063] druntime DSO first assertion fails on Solaris/SPARC
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ibuclaw at gcc dot gnu.org changed:
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--- Comment #1 from ibuclaw at gcc dot gnu.org ---
After others have been committed, can you post a new stacktrace for this?
>From gcc-bugs-return-640640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 18:49:04 2019
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Subject: [Bug d/90065] Unaligned accesses on strict-alignment targets
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ibuclaw at gcc dot gnu.org changed:
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--- Comment #1 from ibuclaw at gcc dot gnu.org ---
What about using a union instead of type-punning here?
>From gcc-bugs-return-640641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 18:52:41 2019
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From: "bafap5 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90081] New: stdint constant macros evaluating to wrong type
Date: Sat, 13 Apr 2019 18:52:00 -0000
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Bug ID: 90081
Summary: stdint constant macros evaluating to wrong type
Product: gcc
Version: 8.3.0
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Target Milestone: ---
stdint.h defines macros for expressing integer constant expressions in such a
way that they evaluate to given types. In the stdint.h spec:
"The macro INTN_C( value) shall expand to an integer constant expression
corresponding to the type int_least N _t. The macro UINTN_C( value) shall
expand to an integer constant expression corresponding to the type uint_least N
_t."
However, within the current version of stdint.h, I find the following:
/* Signed. */
# define INT8_C(c) c
# define INT16_C(c) c
# define INT32_C(c) c
# if __WORDSIZE == 64
# define INT64_C(c) c ## L
# else
# define INT64_C(c) c ## LL
# endif
/* Unsigned. */
# define UINT8_C(c) c
# define UINT16_C(c) c
# define UINT32_C(c) c ## U
# if __WORDSIZE == 64
# define UINT64_C(c) c ## UL
# else
# define UINT64_C(c) c ## ULL
# endif
Many of these macros aren't actually transforming the input at all, which leads
to some erroneous results at compile-time. This was first brought to my
attention in a situation similar to the following:
int32_t x = -5;
if (x < INT32_C(0xFFFFFFFF))
Upon compiling with -Wall -Wextra, the following warning is generated:
warning: comparison of integer expressions of different signedness: ‘int32_t’
{aka ‘int’} and ‘unsigned int’ [-Wsign-compare]
if (x < INT32_C(0xFFFFFFFF))
^
In this way, stdint.h violates the spec, as it is supposed to explicitly yield
a signed expression. I was able to work around this issue by using a cast, but
the macro is really what I'd rather be using.
Inspection of the actual macro definitions reveals the potential for further
errors, such as the following:
int x = (uint8_t) -5; /* Correct, gives 251 */
int y = UINT8_C(-5); /* Incorrect, gives -5 */
The suggested resolution is to adjust the macros to always cast to the
appropriate "_leastN_t" types as the spec requires. Even in cases where the
default type for an expression would be large enough for the given value (such
as int8_t being stored in an int), the spec nonetheless requires the
"_leastN_t" type, which becomes meaningful in the context of dereferencing
operations.
I don't know exactly how gcc is currently deciding on which type to use for a
given integer literal, so I don't want to post a suggestion that could
potentially cause problems... But as far as I can tell, putting explicit casts
in all of the macros should fix the problem.
>From gcc-bugs-return-640642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 19:16:44 2019
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Subject: [Bug target/90077] musl has no multlib support
Date: Sat, 13 Apr 2019 19:16:00 -0000
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Rich Felker <bugdal at aerifal dot cx> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bugdal at aerifal dot cx
--- Comment #2 from Rich Felker <bugdal at aerifal dot cx> ---
musl does not support sharing an include dir between archs (or 32-/64-bit
"versions of the same target" in gcc multilib framing), so aside from policy of
not using lib names like lib64, the multilib framework is just not suitable. We
do support full multiarch with separate include and lib paths for each separate
arch/ABI in the same filesystem, similar but not exactly the same as what
Debian does (Debian shares top-level include just not sys and bits; for musl
this may unofficially work but it's not officially supported and there's no
reason to believe it's compatible with 3rd-party libs that may install
arch-dependent headers generated at build time into that dir).
>From gcc-bugs-return-640643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 20:37:38 2019
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Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Sat, 13 Apr 2019 20:37:00 -0000
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
7.20.4#2 The argument in any instance of these macros shall be an unsuffixed
integer constant (as defined in 6.4.4.1) with a value that does not exceed the
limits for the corresponding type.
>From gcc-bugs-return-640644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 21:09:31 2019
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Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Sat, 13 Apr 2019 21:09:00 -0000
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--- Comment #2 from Guy Perfect <bafap5 at yahoo dot com> ---
The issue is not resolved based on the merits of the out-of-range values used
in the earlier examples. Type resolution still fails in the current
implementation, as demonstrated below:
int x = sizeof ((int8_t) 5); /* Correct, gives 1 */
int y = sizeof (INT8_C(5)); /* Incorrect, gives 4 */
In this case, INT8_C is required to evaluate to type int_least8_t, which cannot
be larger than the smallest integer type able to represent the range of the
type int8_t:
"The typedef name int_least N _t designates a signed integer type with a width
of at least N, such that no signed integer type with lesser size has at least
the specified width."
int8_t can be represented exactly using 1 byte, as shown by the cast. For the
sizeof test to give 4 on the macro demonstrates that the macro is implemented
incorrectly.
A cast is still strongly encouraged (if not necessary) in order for these
macros to be compliant with the stdint.h specification.
>From gcc-bugs-return-640645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 13 22:56:12 2019
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Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |http://www.open-std.org/jtc
| |1/sc22/wg14/www/docs/summar
| |y.htm#dr_456
CC| |msebor at gcc dot gnu.org
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
UINT8_C(-5) isn't valid but expanding the macros to their arguments isn't
conforming either. C11 DR #456 suggests compiler magic is necessary to make
the macros correct:
http://www.open-std.org/jtc1/sc22/wg14/www/docs/summary.htm#dr_456 (Also see
C99 DR 209: http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_209.htm).
>From gcc-bugs-return-640646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 07:01:11 2019
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Subject: [Bug c++/83820] No diagnostic issued for noreturn attribute specifier with an argument list
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> Confirmed, thanks. GCC 8 does a better job diagnosing these issues (e.g.,
> it complains about attribute malloc on a void function) but this case was
> missed in r255469. There probably are other meaningless declarations that
> would be helpful to warn about so please open a new bug for each.
I think the reporter is asking for a hard error and not just a warning? Reads
like an accepts-invalid to me (on this reading at least)
>From gcc-bugs-return-640647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 07:04:33 2019
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Subject: [Bug tree-optimization/81437] missing -Wstringop-overflow reading past the end of a string
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #2)
> GCC 9 prints the two warnings below with -m64 as well as -m32. GCC 8.2.0
> prints them too but only in LP64 mode. With -m32, it only warns about g.
>
> $ gcc -O2 -S -Wall -m32 a.c
> a.c: In function ‘g’:
> a.c:12:3: warning: ‘__builtin_memcpy’ forming offset 5 is out of the bounds
> [0, 4] of object ‘a’ with type ‘const char[4]’ [-Warray-bounds]
> 12 | __builtin_memcpy (d, a + 4, n); // missing warning
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> a.c:10:14: note: ‘a’ declared here
> 10 | const char a[] = "123";
> | ^
> a.c: In function ‘f’:
> a.c:5:3: warning: ‘__builtin_memcpy’ forming offset [5, 2147483651] is out
> of the bounds [0, 4] of object ‘a’ with type ‘const char[4]’ [-Warray-bounds]
> 5 | __builtin_memcpy (d, a + 4, n); // warning (ok)
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> a.c:3:14: note: ‘a’ declared here
> 3 | const char a[] = "123";
> | ^
So we're down to just 1 missing warning now then?
>From gcc-bugs-return-640648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 09:19:17 2019
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Subject: [Bug d/88150] Use sections_elf_shared.d on Solaris
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--- Comment #13 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Sun Apr 14 09:18:42 2019
New Revision: 270345
URL: https://gcc.gnu.org/viewcvs?rev=270345&root=gcc&view=rev
Log:
Use gcc/sections/elf_shared.d on Solaris 11.5 (PR d/88150)
PR d/88150
* libdruntime/gcc/sections/elf_shared.d [Solaris] (SharedELF): Set
to true.
Import core.sys.solaris.dlfcn, core.sys.solaris.link,
core.sys.solaris.sys.elf, core.sys.solaris.sys.link.
(dummy_ref): Declare.
(initSections): Initialize dummy_ref.
(getDependencies): Set strtab.
(handleForName): Don't dlclose handle.
(findDSOInfoForAddr): Set IterateManually.
(getprogname): Declare.
(progname): Use it.
* libdruntime/gcc/sections/package.d [Solaris]: Import
gcc.sections.elf_shared instead of gcc.sections.solaris.
* libdruntime/gcc/sections/solaris.d: Remove.
* libdruntime/Makefile.am (DRUNTIME_DSOURCES): Remove
gcc/sections/solaris.d.
Removed:
trunk/libphobos/libdruntime/gcc/sections/solaris.d
Modified:
trunk/libphobos/ChangeLog
trunk/libphobos/libdruntime/Makefile.am
trunk/libphobos/libdruntime/Makefile.in
trunk/libphobos/libdruntime/gcc/sections/elf_shared.d
trunk/libphobos/libdruntime/gcc/sections/package.d
>From gcc-bugs-return-640649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 09:31:24 2019
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--- Comment #14 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Sun Apr 14 09:30:42 2019
New Revision: 270347
URL: https://gcc.gnu.org/viewcvs?rev=270347&root=gcc&view=rev
Log:
Work around lack of dlpi_tls_modid before Solaris 11.5
2019-04-14 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
Iain Buclaw <ibuclaw@gdcproject.org>
PR d/88150
* m4/druntime/os.m4 (DRUNTIME_OS_DLPI_TLS_MODID): New macro.
* configure.ac: Use it.
Call AC_USE_SYSTEM_EXTENSIONS.
* configure: Regenerate.
* Makefile.in, libdruntime/Makefile.in, src/Makefile.in,
testsuite/Makefile.in: Regenerate.
* libdruntime/gcc/config.d.in (OS_Have_Dlpi_Tls_Modid): Define.
* libdruntime/gcc/sections/elf_shared.d: Import gcc.config.
(scanSegments) <PT_TLS> [OS_Have_Dlpi_Tls_Modid]: Use
dlpi_tls_modid.
[Solaris]: Use dlinfo(RTLD_DI_LINKMAP) to get rt_tlsmodid.
Otherwise clear pdso._tlsMod, pdso._tlsSize.
(getTLSRange) [Solaris && !OS_Have_Dlpi_Tls_Modid]: Readjust mod.
Modified:
trunk/libphobos/ChangeLog
trunk/libphobos/Makefile.in
trunk/libphobos/configure (contents, props changed)
trunk/libphobos/configure.ac
trunk/libphobos/libdruntime/Makefile.in
trunk/libphobos/libdruntime/gcc/config.d.in
trunk/libphobos/libdruntime/gcc/sections/elf_shared.d
trunk/libphobos/m4/druntime/os.m4
trunk/libphobos/src/Makefile.in
trunk/libphobos/testsuite/Makefile.in
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Subject: [Bug d/87799] failure during bootstrap, fails to build d/filename.o
Date: Sun, 14 Apr 2019 09:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87799
--- Comment #2 from jpfau at gcc dot gnu.org ---
Author: jpfau
Date: Sun Apr 14 09:52:22 2019
New Revision: 270349
URL: https://gcc.gnu.org/viewcvs?rev=270349&root=gcc&view=rev
Log:
PR d/87799 Fix D build on windows hosts
PR d/87799
* d-system.h (_mkdir): Forward _mkdir on MinGW to mkdir in system.h.
* configure.ac: Remove d from unsupported languages on mingw and cygwin.
* configure: Regenerate.
Modified:
trunk/ChangeLog
trunk/configure
trunk/configure.ac
trunk/gcc/d/ChangeLog
trunk/gcc/d/d-system.h
>From gcc-bugs-return-640651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 10:15:28 2019
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90082] New: [9 Regression] ICE in delete_unmarked_insns, at dce.c:653
Date: Sun, 14 Apr 2019 10:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90082
Bug ID: 90082
Summary: [9 Regression] ICE in delete_unmarked_insns, at
dce.c:653
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
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gcc-9.0.0-alpha20190407 snapshot (r270192) ICEs when compiling the following
testcase w/ -O1 (-Og) -fnon-call-exceptions -ftrapv:
void
b (int a)
{
if (__builtin_setjmp (0) == 0)
__asm__ ("" : : "n" (a * 2));
}
% gcc-9.0.0-alpha20190407 -O1 -fnon-call-exceptions -ftrapv -w -c m4o3ztdf.c
m4o3ztdf.c: In function 'b':
m4o3ztdf.c:5:5: error: impossible constraint in 'asm'
5 | __asm__ ("" : : "n" (a * 2));
| ^~~~~~~
during RTL pass: rtl_dce
m4o3ztdf.c:6:1: internal compiler error: in delete_unmarked_insns, at dce.c:653
6 | }
| ^
0x78288d delete_unmarked_insns
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/dce.c:653
0x1549c68 fast_dce
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/dce.c:1180
0x154a474 rest_of_handle_fast_dce
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/dce.c:1194
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Subject: [Bug rtl-optimization/90083] New: internal compiler error: in expand_debug_locations, at cfgexpand.c:5403 with -O3 and -g
Date: Sun, 14 Apr 2019 11:08:00 -0000
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Bug ID: 90083
Summary: internal compiler error: in expand_debug_locations, at
cfgexpand.c:5403 with -O3 and -g
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
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Created attachment 46163
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46163&action=edit
Sample triggering the bug
Hey,
The following code causes internal compiler error with -O{1-3} used in
conjunction with -g flag.
The bug gets triggered if you have a long a chain of functions that are
annotated with
__attribute__ ((target ("avx2")))
But the attribute annotation is missing in one of them. The code compiles fine
with -mavx2:
g++ -O3 -g test.cpp -mavx2
or with O0 (but produces warnings as expected):
g++ -O0 -g test.cpp
test.cpp: In function ‘float fooBackend(const float*, const float*) [with
Register = __vector(8) float]’:
test.cpp:19:12: warning: AVX vector return without AVX enabled changes the ABI
[-Wpsabi]
Register highest = and_ps(and_me, *begin);
^~~~~~~
test.cpp:19:28: warning: AVX vector argument without AVX enabled changes the
ABI [-Wpsabi]
Register highest = and_ps(and_me, *begin);
~~~~~~^~~~~~~~~~~~~~~~
test.cpp:19:28: note: The ABI for passing parameters with 32-byte alignment has
changed in GCC 4.6
Compilation also succeeds when just using O3, with warnings:
g++ -O3 test.cpp
test.cpp: In function ‘float fooBackend(const float*, const float*) [with
Register = __vector(8) float]’:
test.cpp:19:12: warning: AVX vector return without AVX enabled changes the ABI
[-Wpsabi]
Register highest = and_ps(and_me, *begin);
^~~~~~~
However trying to compile with -O3 and -g results in a compiler crash:
g++ -O3 -g test.cpp
test.cpp: In function ‘float fooBackend(const float*, const float*) [with
Register = __vector(8) float]’:
test.cpp:19:12: warning: AVX vector return without AVX enabled changes the ABI
[-Wpsabi]
Register highest = and_ps(and_me, *begin);
^~~~~~~
during RTL pass: expand
test.cpp: In function ‘float AVX2_foo(const float*, const float*)’:
test.cpp:24:41: internal compiler error: in expand_debug_locations, at
cfgexpand.c:5403
__attribute__ ((target ("avx2"))) float AVX2_foo(const float *begin, const
float *end) {
OS: Archlinux
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Subject: [Bug fortran/89981] [8 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
Date: Sun, 14 Apr 2019 11:26:00 -0000
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--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Apr 14 11:26:18 2019
New Revision: 270350
URL: https://gcc.gnu.org/viewcvs?rev=270350&root=gcc&view=rev
Log:
2019-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>
Backport from trunk
PR fortran/89981
* resolve.c (resolve_global_procedure): If the global symbol is an
ENTRY, also look up its name among the entries.
2019-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>
Backport from trunk
PR fortran/89981
* gfortran.dg/entry_22.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/entry_22.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/resolve.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/89981] [8 Regression] gfortran -pedantic rejects code in 8.3.1 that is accepted with 8.3.0
Date: Sun, 14 Apr 2019 11:27:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on all affected branches, closing.
>From gcc-bugs-return-640655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 11:30:49 2019
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgomp/90084] New: Parallelize libgomp testing
Date: Sun, 14 Apr 2019 11:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90084
Bug ID: 90084
Summary: Parallelize libgomp testing
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
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CC: jakub at gcc dot gnu.org
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Currently, testing libgomp takes a loong time because it lacks parallelization.
It would really help the testing speeds (or keep people from deselecting
it on their builds for regression testing) if this functionality was added.
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Subject: [Bug c++/33661] template methods forget explicit local register asm vars
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--- Comment #15 from Alexey Dobriyan <adobriyan at gmail dot com> ---
I can only reconfirm this bug still exists with 8.2.0 after rediscovering it
independently.
Linux system calls taking 4+ arguments can't be templatized as they require
register T3 _a3 asm("r10") = a3;
But using
"r10" (a3)
in assembly input constraints doesn't work either.
>From gcc-bugs-return-640657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 12:18:20 2019
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Subject: [Bug fortran/87352] [7/8/9 Regression] Large stack usage with new gfortran
Date: Sun, 14 Apr 2019 12:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87352
--- Comment #16 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Apr 14 12:17:42 2019
New Revision: 270351
URL: https://gcc.gnu.org/viewcvs?rev=270351&root=gcc&view=rev
Log:
2019-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87352
Backport from trunk
* gfortran.h (gfc_component): Add finalized field.
* class.c (finalize_component): If the component is already
finalized, return early. Set component->finalized on exit.
2019-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>
Backport from trunk
PR fortran/87352
* gfortran.dg/finalize_28.f90: Adjust count of __builtin_free.
* gfortran.dg/finalize_34.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/finalize_34.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/class.c
branches/gcc-8-branch/gcc/fortran/gfortran.h
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/finalize_28.f90
>From gcc-bugs-return-640658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 12:27:05 2019
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From: "graham.stott at btinternet dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81025] [8 Regression] gcc ICE while building glibc for MIPS soft-float multi-lib variant
Date: Sun, 14 Apr 2019 12:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81025
--- Comment #19 from graham.stott at btinternet dot com ---
JeffThere's trival error in gcc/config/mips/mti-linux.h which causes loads of
warnings everytime it's includedThere's a missing space between a string and
MACRO about line 28Graham
-------- Original message --------
From: law at redhat dot com <gcc-bugzilla@gcc.gnu.org>
Date: 03/04/2019 06:00 (GMT+00:00)
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/81025] [8/9 Regression] gcc ICE while building
glibc for MIPS soft-float multi-lib variant
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81025Jeffrey A. Law <law at redhat
dot com> changed:          What   |Removed                   Â
|Added----------------------------------------------------------------------------
         Priority|P3                         |P2            Status|WAITING Â
                 |NEW          Assignee|unassigned at gcc dot gnu.org    Â
|law at redhat dot com--- Comment #16 from Jeffrey A. Law <law at redhat dot
com> ---In response to c#10 and c#11. I suspect you're not able to trigger
thefailures because of something in auto-host.h. If I first configure &
installbinutils for the target (mips-mti-linux-gnu), then configure gcc for the
sametarget I can trigger the failures per the instructions in this BZ.What I'm
unable to figure out is my own comment WRT FRAME_RELATED_P from lastyear. I
don't see any evidence this is at all related to FRAME_RELATED_P insnsin delay
slots.AFAICT we've done shrink wrapping on this case. ISTM there's multiple
paths tothe epilogue, some save r16/r17 and adjust the stack pointer, others do
not(according to my reading of the dwarf2cfi pass RTL dump). Thus triggering
theCFI failure due to the inconsistency (not to mention bogus code).So of
course the next thing to do is look at the prologue/epilogue dump andeverything
looks fine there. Things also look fine at the .barriers dump. Then reorg
comes along and mucks things up horribly.The bug here is in reorg and its
legacy of trying to compensate for the lack ofa CFG. In particular it has a
function skip_consecutive_labels. The idea (ofcourse) is to have jumps target
the last label if there's several in a row. The code looks something like this:
for (insn = label; insn != 0 && !INSN_P (insn); insn = NEXT_INSN (insn))Â Â Â if
(LABEL_P (insn))Â Â Â Â Â label = insn;THe loop termination condition allows the
code to look through notes and otherrandom crud.Now imagine if we
have(code_label 1)(barrier)(code_label 2)(more code)The BARRIER after a
CODE_LABEL can occur due to __builtin_unreachable.If a jump targets code_label
1, it will be redirected to code_label 2. That'sfine from a runtime
standpoint, but runs afoul of the CFI bits. Why?Consider if the jump which
targeted label 1 did not have a prologue (we'reshrink wrapping) and "more code"
section is a shrink wrapped epilogue.The original paths to code_label 2 will
have one CFI state while the new pathsto code_label 1 will have a different CFI
state and we trip the check.I'm spinning a fix overnight.
>From gcc-bugs-return-640659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 12:28:20 2019
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Subject: [Bug fortran/87352] [7/8/9 Regression] Large stack usage with new gfortran
Date: Sun, 14 Apr 2019 12:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87352
--- Comment #17 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Apr 14 12:27:44 2019
New Revision: 270352
URL: https://gcc.gnu.org/viewcvs?rev=270352&root=gcc&view=rev
Log:
2019-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/87352
Backport from trunk
* gfortran.h (gfc_component): Add finalized field.
* class.c (finalize_component): If the component is already
finalized, return early. Set component->finalized on exit.
2019-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>
Backport from trunk
PR fortran/87352
* gfortran.dg/finalize_28.f90: Adjust count of __builtin_free.
* gfortran.dg/finalize_34.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/finalize_34.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/class.c
branches/gcc-7-branch/gcc/fortran/gfortran.h
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/finalize_28.f90
>From gcc-bugs-return-640660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 12:48:03 2019
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Subject: [Bug d/87799] failure during bootstrap, fails to build d/filename.o
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ibuclaw at gcc dot gnu.org changed:
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--- Comment #3 from ibuclaw at gcc dot gnu.org ---
Fixed in r270349.
>From gcc-bugs-return-640661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 13:07:53 2019
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Subject: [Bug d/88150] Use sections_elf_shared.d on Solaris
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ibuclaw at gcc dot gnu.org changed:
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--- Comment #15 from ibuclaw at gcc dot gnu.org ---
See r270345 and r270347.
>From gcc-bugs-return-640662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 13:12:37 2019
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Subject: [Bug c++/90085] New: c++17 template argument deduction results in missed optimization
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Bug ID: 90085
Summary: c++17 template argument deduction results in missed
optimization
Product: gcc
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Created attachment 46164
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46164&action=edit
test case
When deducing template arguments of a constexpr std::array, all the elements
(strings in the test case) are stored in the data section, regardless if there
are used in the program or not. Without template argument deduction only the
accessed elements are stored in the data section. Template argument deduction
somehow prevents the reduction of the constants.
https://godbolt.org/z/q_COuU
>From gcc-bugs-return-640663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 14:26:30 2019
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Subject: [Bug fortran/87352] [7/8/9 Regression] Large stack usage with new gfortran
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--- Comment #18 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The quadratic behavior is gone, but the very large stack usage is not
fixed yet.
Looking further.
>From gcc-bugs-return-640664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 16:27:57 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87763
--- Comment #52 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #49)
> I think the insv_1 (and it's closely related insv_2) regressions can be
> fixed by a single ior/and pattern in the backend or by hacking up combine a
> bit. I'm still playing with the latter, but may have to put it on the back
> burner because of the pain of note management :( Hoping to draw a
> conclusion on that by the end of this week. If I can't get a clean combine
> solution, then my recommendation would be to build the suitable backend
> pattern. It just has to match stuff like
>
> (set (reg1) (ior (and (reg2) ...)) with a matching constraint on reg1 and
> reg2 to ensure it's a RMW operand.
I don't think the current insv patterns are very useful, a more general
approach would be to support bitfield insert of any immediate which is not
currently supported. This can then be expanded into a bic/orr, bic/add, mov/bfi
or movk depending on the mask/immediate.
Note the register allocation issue as discussed in PR87871 which causes the
codesize regressions after combine inserts extra moves is still the worst part
of this issue.
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Subject: [Bug libgomp/90084] Parallelize libgomp testing
Date: Sun, 14 Apr 2019 16:56:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Not parallelizing is intentional, because a big portion of the libgomp tests
spawn threads, many of them a lot of them, so the parallelization there is
already at the tests level.
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Subject: [Bug fortran/87352] [7/8/9 Regression] Large stack usage with new gfortran
Date: Sun, 14 Apr 2019 17:02:00 -0000
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--- Comment #19 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Comment on attachment 44718
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44718
Affected module and example main program
The only way at the moment would be to change
program testprog
use testmodule
type(instlist_type),target :: instlist
instlist%min_tstart = 42
instlist%max_tstop = 101
print *, "Hello world"
end program testprog
into
program testprog
use testmodule
type(instlist_type),target, allocatable :: instlist
allocate (instlist)
instlist%min_tstart = 42
instlist%max_tstop = 101
print *, "Hello world"
end program testprog
if instlist is large enough, possibly in a front-end pass.
>From gcc-bugs-return-640667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 17:02:55 2019
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Subject: [Bug fortran/87352] [7/8/9 Regression] Large stack usage with new gfortran
Date: Sun, 14 Apr 2019 17:02:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
Assignee|tkoenig at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #20 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Unassigning for now. I don't think the stack part can be fixed
in the gcc 9.1 release timeframe.
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Subject: [Bug fortran/87352] [7/8/9 Regression] Large stack usage with new gfortran
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87352
--- Comment #21 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #19)
> Comment on attachment 44718 [details]
> Affected module and example main program
>
> The only way at the moment would be to change
>
> program testprog
>
> use testmodule
>
> type(instlist_type),target :: instlist
>
> instlist%min_tstart = 42
> instlist%max_tstop = 101
>
> print *, "Hello world"
>
> end program testprog
>
> into
>
> program testprog
>
> use testmodule
>
> type(instlist_type),target, allocatable :: instlist
>
> allocate (instlist)
> instlist%min_tstart = 42
> instlist%max_tstop = 101
>
> print *, "Hello world"
>
> end program testprog
>
> if instlist is large enough, possibly in a front-end pass.
Actually no, this change does not work.
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Subject: [Bug d/90086] New: libphobos: warning: type and size of dynamic symbol `fiber_switchContext' are not defined
Date: Sun, 14 Apr 2019 17:59:00 -0000
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Bug ID: 90086
Summary: libphobos: warning: type and size of dynamic symbol
`fiber_switchContext' are not defined
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
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FAIL: libphobos.druntime_shared/core/thread.d (test for excess errors)
Excess errors:
/usr/local/bin/ld: warning: type and size of dynamic symbol
`fiber_switchContext' are not defined
The lack of type or size directives also means the execution of the test
segfaults as well.
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Subject: [Bug fortran/90022] Issue with CFI_is_contigous and CFI base address
Date: Sun, 14 Apr 2019 18:15:00 -0000
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Apr 14 18:14:58 2019
New Revision: 270353
URL: https://gcc.gnu.org/viewcvs?rev=270353&root=gcc&view=rev
Log:
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* trans-decl.c (gfc_get_symbol_decl): Assumed shape and assumed
rank dummies of bind C procs require deferred initialization.
(convert_CFI_desc): New procedure to convert incoming CFI
descriptors to gfc types and back again.
(gfc_trans_deferred_vars): Call it.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Null the CFI
descriptor pointer. Free the descriptor in all cases.
PR fortran/89846
* expr.c (is_CFI_desc): New function.
(is_subref_array): Tidy up by referencing the symbol directly.
* gfortran.h : Prototype for is_CFI_desc.
* trans_array.c (get_CFI_desc): New function.
(gfc_get_array_span, gfc_conv_scalarized_array_ref,
gfc_conv_array_ref): Use it.
* trans.c (get_array_span): Extract the span from descriptors
that are indirect references.
PR fortran/90022
* trans-decl.c (gfc_get_symbol_decl): Make sure that the se
expression is a pointer type before converting it to the symbol
backend_decl type.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Eliminate
temporary creation for intent(in).
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* gfortran.dg/ISO_Fortran_binding_4.f90: Modify the value of x
in ctg. Test the conversion of the descriptor types in the main
program.
* gfortran.dg/ISO_Fortran_binding_10.f90: New test.
* gfortran.dg/ISO_Fortran_binding_10.c: Called by it.
PR fortran/89846
* gfortran.dg/ISO_Fortran_binding_11.f90: New test.
* gfortran.dg/ISO_Fortran_binding_11.c: Called by it.
PR fortran/90022
* gfortran.dg/ISO_Fortran_binding_1.c: Correct the indexing for
the computation of 'ans'. Also, change the expected results for
CFI_is_contiguous to comply with standard.
* gfortran.dg/ISO_Fortran_binding_1.f90: Correct the expected
results for CFI_is_contiguous to comply with standard.
* gfortran.dg/ISO_Fortran_binding_9.f90: New test.
* gfortran.dg/ISO_Fortran_binding_9.c: Called by it.
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Only
return immediately if the source pointer is null. Bring
forward the extraction of the gfc type. Extract the kind so
that the element size can be correctly computed for sections
and components of derived type arrays. Remove the free of the
CFI descriptor since this is now done in trans-expr.c.
(gfc_desc_to_cfi_desc): Only allocate the CFI descriptor if it
is not null.
(CFI_section): Normalise the difference between the upper and
lower bounds by the stride to correctly calculate the extents
of the section.
PR fortran/89846
* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Use
the stride measure for the gfc span if it is not a multiple
of the element length. Otherwise use the element length.
PR fortran/90022
* runtime/ISO_Fortran_binding.c (CFI_is_contiguous) : Return
1 for true and 0 otherwise to comply with the standard. Correct
the contiguity check for rank 3 and greater by using the stride
measure of the lower dimension rather than the element length.
Added:
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_10.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_10.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_11.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_11.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_9.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_9.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_1.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_1.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_3.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_4.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/runtime/ISO_Fortran_binding.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89843
--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Apr 14 18:14:58 2019
New Revision: 270353
URL: https://gcc.gnu.org/viewcvs?rev=270353&root=gcc&view=rev
Log:
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* trans-decl.c (gfc_get_symbol_decl): Assumed shape and assumed
rank dummies of bind C procs require deferred initialization.
(convert_CFI_desc): New procedure to convert incoming CFI
descriptors to gfc types and back again.
(gfc_trans_deferred_vars): Call it.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Null the CFI
descriptor pointer. Free the descriptor in all cases.
PR fortran/89846
* expr.c (is_CFI_desc): New function.
(is_subref_array): Tidy up by referencing the symbol directly.
* gfortran.h : Prototype for is_CFI_desc.
* trans_array.c (get_CFI_desc): New function.
(gfc_get_array_span, gfc_conv_scalarized_array_ref,
gfc_conv_array_ref): Use it.
* trans.c (get_array_span): Extract the span from descriptors
that are indirect references.
PR fortran/90022
* trans-decl.c (gfc_get_symbol_decl): Make sure that the se
expression is a pointer type before converting it to the symbol
backend_decl type.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Eliminate
temporary creation for intent(in).
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* gfortran.dg/ISO_Fortran_binding_4.f90: Modify the value of x
in ctg. Test the conversion of the descriptor types in the main
program.
* gfortran.dg/ISO_Fortran_binding_10.f90: New test.
* gfortran.dg/ISO_Fortran_binding_10.c: Called by it.
PR fortran/89846
* gfortran.dg/ISO_Fortran_binding_11.f90: New test.
* gfortran.dg/ISO_Fortran_binding_11.c: Called by it.
PR fortran/90022
* gfortran.dg/ISO_Fortran_binding_1.c: Correct the indexing for
the computation of 'ans'. Also, change the expected results for
CFI_is_contiguous to comply with standard.
* gfortran.dg/ISO_Fortran_binding_1.f90: Correct the expected
results for CFI_is_contiguous to comply with standard.
* gfortran.dg/ISO_Fortran_binding_9.f90: New test.
* gfortran.dg/ISO_Fortran_binding_9.c: Called by it.
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Only
return immediately if the source pointer is null. Bring
forward the extraction of the gfc type. Extract the kind so
that the element size can be correctly computed for sections
and components of derived type arrays. Remove the free of the
CFI descriptor since this is now done in trans-expr.c.
(gfc_desc_to_cfi_desc): Only allocate the CFI descriptor if it
is not null.
(CFI_section): Normalise the difference between the upper and
lower bounds by the stride to correctly calculate the extents
of the section.
PR fortran/89846
* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Use
the stride measure for the gfc span if it is not a multiple
of the element length. Otherwise use the element length.
PR fortran/90022
* runtime/ISO_Fortran_binding.c (CFI_is_contiguous) : Return
1 for true and 0 otherwise to comply with the standard. Correct
the contiguity check for rank 3 and greater by using the stride
measure of the lower dimension rather than the element length.
Added:
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_10.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_10.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_11.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_11.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_9.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_9.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_1.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_1.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_3.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_4.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/runtime/ISO_Fortran_binding.c
>From gcc-bugs-return-640672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 18:15:35 2019
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Subject: [Bug fortran/89846] CFI_select_part creates incorrect descriptor
Date: Sun, 14 Apr 2019 18:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89846
--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Apr 14 18:14:58 2019
New Revision: 270353
URL: https://gcc.gnu.org/viewcvs?rev=270353&root=gcc&view=rev
Log:
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* trans-decl.c (gfc_get_symbol_decl): Assumed shape and assumed
rank dummies of bind C procs require deferred initialization.
(convert_CFI_desc): New procedure to convert incoming CFI
descriptors to gfc types and back again.
(gfc_trans_deferred_vars): Call it.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Null the CFI
descriptor pointer. Free the descriptor in all cases.
PR fortran/89846
* expr.c (is_CFI_desc): New function.
(is_subref_array): Tidy up by referencing the symbol directly.
* gfortran.h : Prototype for is_CFI_desc.
* trans_array.c (get_CFI_desc): New function.
(gfc_get_array_span, gfc_conv_scalarized_array_ref,
gfc_conv_array_ref): Use it.
* trans.c (get_array_span): Extract the span from descriptors
that are indirect references.
PR fortran/90022
* trans-decl.c (gfc_get_symbol_decl): Make sure that the se
expression is a pointer type before converting it to the symbol
backend_decl type.
* trans-expr.c (gfc_conv_gfc_desc_to_cfi_desc): Eliminate
temporary creation for intent(in).
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* gfortran.dg/ISO_Fortran_binding_4.f90: Modify the value of x
in ctg. Test the conversion of the descriptor types in the main
program.
* gfortran.dg/ISO_Fortran_binding_10.f90: New test.
* gfortran.dg/ISO_Fortran_binding_10.c: Called by it.
PR fortran/89846
* gfortran.dg/ISO_Fortran_binding_11.f90: New test.
* gfortran.dg/ISO_Fortran_binding_11.c: Called by it.
PR fortran/90022
* gfortran.dg/ISO_Fortran_binding_1.c: Correct the indexing for
the computation of 'ans'. Also, change the expected results for
CFI_is_contiguous to comply with standard.
* gfortran.dg/ISO_Fortran_binding_1.f90: Correct the expected
results for CFI_is_contiguous to comply with standard.
* gfortran.dg/ISO_Fortran_binding_9.f90: New test.
* gfortran.dg/ISO_Fortran_binding_9.c: Called by it.
2019-04-14 Paul Thomas <pault@gcc.gnu.org>
PR fortran/89843
* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Only
return immediately if the source pointer is null. Bring
forward the extraction of the gfc type. Extract the kind so
that the element size can be correctly computed for sections
and components of derived type arrays. Remove the free of the
CFI descriptor since this is now done in trans-expr.c.
(gfc_desc_to_cfi_desc): Only allocate the CFI descriptor if it
is not null.
(CFI_section): Normalise the difference between the upper and
lower bounds by the stride to correctly calculate the extents
of the section.
PR fortran/89846
* runtime/ISO_Fortran_binding.c (cfi_desc_to_gfc_desc): Use
the stride measure for the gfc span if it is not a multiple
of the element length. Otherwise use the element length.
PR fortran/90022
* runtime/ISO_Fortran_binding.c (CFI_is_contiguous) : Return
1 for true and 0 otherwise to comply with the standard. Correct
the contiguity check for rank 3 and greater by using the stride
measure of the lower dimension rather than the element length.
Added:
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_10.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_10.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_11.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_11.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_9.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_9.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_1.c
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_1.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_3.f90
trunk/gcc/testsuite/gfortran.dg/ISO_Fortran_binding_4.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/runtime/ISO_Fortran_binding.c
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Subject: [Bug fortran/89846] CFI_select_part creates incorrect descriptor
Date: Sun, 14 Apr 2019 18:18:00 -0000
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |pault at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk - just in time.
Thanks for the report
Paul
>From gcc-bugs-return-640673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 18:18:20 2019
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Subject: [Bug fortran/89843] CFI_section delivers incorrect result descriptor
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |pault at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk - just in time.
Thanks for the report
Paul
>From gcc-bugs-return-640675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 18:19:08 2019
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Subject: [Bug fortran/90022] Issue with CFI_is_contigous and CFI base address
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk - just in time.
Thanks for the report
Paul
>From gcc-bugs-return-640676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 18:56:29 2019
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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--- Comment #8 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Works now (not surprising after six years).
Uncluttering the data base and my personal list of bugs.
>From gcc-bugs-return-640677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 19:28:10 2019
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
We now get
$ cat tailcall.c
void bar(void);
void baz(void);
void foo(int a)
{
if (a)
bar();
else
baz();
}
$ gcc -S -Os tailcall.c
$ cat tailcall.s
.file "tailcall.c"
.text
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
testl %edi, %edi
je .L2
jmp bar
.L2:
jmp baz
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 9.0.1 20190414 (experimental)"
.section .note.GNU-stack,"",@progbits
so the original test case is fixed.
With a slightly more complex test case, we now get
$ cat tailcall2.s
.file "tailcall2.c"
.text
.globl foo
.type foo, @function
foo:
.LFB0:
.cfi_startproc
pushq %rcx
.cfi_def_cfa_offset 16
call gargle
testl %eax, %eax
je .L2
popq %rdx
.cfi_remember_state
.cfi_def_cfa_offset 8
jmp bar
.L2:
.cfi_restore_state
popq %rax
.cfi_def_cfa_offset 8
jmp baz
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 9.0.1 20190414 (experimental)"
.section .note.GNU-stack,"",@progbits
so the problem is still present in this case (using two different
registers seems strange, but it should not matter).
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Subject: [Bug fortran/85448] Report binding label clash with a global identifyer
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85448
--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
With current trunk, I get
$ gfortran od.c odopen.f90
$ ./a.out
c_odopen
odopen
unit=8
$ gfortran od.c odopen.f90
$ ./a.out
c_odopen
odopen
unit=8
$
which looks correct.
So, I'm going to commit a test case (better safe than sorry) and
close as fixed.
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Test case committed, closing.
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--- Comment #10 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Apr 14 20:15:48 2019
New Revision: 270354
URL: https://gcc.gnu.org/viewcvs?rev=270354&root=gcc&view=rev
Log:
2019-04-14 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/85448
* gfortran.dg/bind_c_usage_33.f90: New test and...
* gfortran.dg/bind_c_usage_33_c.c: Additional source.
Added:
trunk/gcc/testsuite/gfortran.dg/bind_c_usage_33.f90
trunk/gcc/testsuite/gfortran.dg/bind_c_usage_33_c.c
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/90087] New: Suboptimal codegen for x < 0 ? x - INT_MIN : x
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Bug ID: 90087
Summary: Suboptimal codegen for x < 0 ? x - INT_MIN : x
Product: gcc
Version: 9.0
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Keywords: missed-optimization
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Target: x86_64,AArch64
int foo(int x)
{
return x < 0 ? x - INT_MIN : x;
}
| GCC | Clang
-------+--------------------------------+-------------------------
x86-64 | movl %edi, %eax | movl %edi, %eax
| leal -2147483648(%rdi), %edx | andl $2147483647, %eax
| testl %edi, %edi |
| cmovs %edx, %eax |
-------+--------------------------------+-------------------------
ARM64 | cmp w0, 0 | and w0, w0, #0x7fffffff
| mov w1, -2147483648 |
| add w1, w0, w1 |
| csel w0, w1, w0, lt |
https://godbolt.org/z/VX0Ou2
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Subject: [Bug tree-optimization/90087] Suboptimal codegen for x < 0 ? x - INT_MIN : x
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-14
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is partly because GCC converts x^INT_MIN to x - INT_MIN but maybe it
should be the opposite way around. Also it can't figure out that when x >= 0,
then x^INT_MIN is just x.
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Subject: [Bug rtl-optimization/90082] [9 Regression] ICE in delete_unmarked_insns, at dce.c:653
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----------------------------------------------------------------------------
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Severity|normal |minor
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Subject: [Bug lto/89358] [7/8/9 Regression] Combining -std=c++14 and -std=c++17 objects gives ODR warnings
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--- Comment #16 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Apr 14 20:56:45 2019
New Revision: 270355
URL: https://gcc.gnu.org/viewcvs?rev=270355&root=gcc&view=rev
Log:
PR lto/89358
* g++.dg/lto/pr89358_0.C: New testcase.
* g++.dg/lto/pr89358_1.C: New testcase.
* ipa-devirt.c (skip_in_fields_list_p): New.
(odr_types_equivalent_p): Use it.
Added:
trunk/gcc/testsuite/g++.dg/lto/pr89358_0.C
trunk/gcc/testsuite/g++.dg/lto/pr89358_1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-devirt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/90082] [9 Regression] ICE in delete_unmarked_insns, at dce.c:653
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-14
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with my r268544. I'll have a look.
>From gcc-bugs-return-640686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 14 21:36:09 2019
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Subject: [Bug target/90088] New: 3 ops LEA should be avoided on Intel CPUs
Date: Sun, 14 Apr 2019 21:36:00 -0000
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Bug ID: 90088
Summary: 3 ops LEA should be avoided on Intel CPUs
Product: gcc
Version: 9.0
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Target: Intel x86
Originally I filed a bug report to LLVM about
int foo(int x)
{
return (x << 1) | 1;
}
But got an answered that 3 ops LEA is intentionally avoided due to
> For LEA instructions with three source operands and some specific
> situations, instruction latency has increased to 3 cycles, and must
> dispatch via port 1:
> — LEA that has all three source operands: base, index, and offset.
> — LEA that uses base and index registers where the base is EBP, RBP, or R13.
> — LEA that uses RIP relative addressing mode.
> — LEA that uses 16-bit addressing mode.
From 3.5.1.3 (Using LEA) of Intel's Optimization Reference Manual.
https://godbolt.org/z/OqkdAO
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Subject: [Bug target/90088] 3 ops LEA should be avoided on Intel CPUs
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I could see it being useful for -Os case.
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #25 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #24)
> So improve_allocation() initially looks at using r0, but disregards it
> because check_hard_reg_p() returns false for r0, and that is because we fail
> this test:
>
> /* Checking only profitable hard regs. */
> if (! TEST_HARD_REG_BIT (profitable_regs, hard_regno))
> return false;
>
> I don't know why r0 isn't in profitable_regs for pseudo 116.
Profitable regs there contain also conflict regs. R0 is conflicting with p106.
If R0 usage (in call insn) were in the same BB, your new conflict calculation
found that there is no actual conflict. But IRA uses df-infrastructure which
tells IRA that R0 lives at the BB end where p106 occurs.
So the right solution of the PR would be fixing df-infrastructure live analysis
or may be somehow to ignore usage of r0 in call insn. That is how see the
situation.
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Subject: [Bug target/90088] 3 ops LEA should be avoided on Intel CPUs
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--- Comment #2 from Nikita Kniazev <nok.raven at gmail dot com> ---
> I could see it being useful for -Os case.
Yes, and I also was confirmed that it is a bug that Clang with -Os avoids it.
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Subject: [Bug c++/90089] New: Missing optimization, elimination of empty data dependant loops
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void * x;
void test(){ for(void * p = x; p; p=*(void**)p); }
With -O3 gives:
test():
mov rax, QWORD PTR x[rip]
test rax, rax
je .L1
.L3:
mov rax, QWORD PTR [rax]
test rax, rax
jne .L3
.L1:
ret
As you can see it currently traverses pointers even though it could be
optimized away.
6.8.2.2 Forward progress
The implementation may assume that any thread will eventually do one of the
following:
(1.1) terminate,
(1.2) make a call to a library I/O function,
(1.3) perform an access through a volatile glvalue, or
(1.4) perform a synchronization operation or an atomic operation.
[ Note: This is intended to allow compiler transformations such as removal of
empty loops, even when termination cannot be proven. — end note ]
MSVC and ICC performs this optimization.
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Subject: [Bug tree-optimization/90089] Missing optimization, elimination of empty data dependant loops
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I thought I saw a similar bug filed before but I can't seem to find it.
Also in theory, pointer deferencing could have a side effect iff the pointer is
invalid.
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Found it, PR 67809.
*** This bug has been marked as a duplicate of bug 67809 ***
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Subject: [Bug middle-end/67809] Empty pointer-chasing loops aren't optimized out
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CC| |gareth@ignition-web.co.uk
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 90089 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-640694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 06:40:01 2019
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Subject: [Bug sanitizer/90090] New: [7/8/9 Regression] ICE in mark_reachable_handlers, at tree-eh.c:3938 since r219202
Date: Mon, 15 Apr 2019 06:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90090
Bug ID: 90090
Summary: [7/8/9 Regression] ICE in mark_reachable_handlers, at
tree-eh.c:3938 since r219202
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
I know it's a strange combination of options, but:
$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/tree-ssa/recip-8.c
-fexceptions -fsanitize=thread -Ofast -fno-tree-dce -fnon-call-exceptions
-fsignaling-nans
cc1: warning: ‘-fassociative-math’ disabled; other options take precedence
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/tree-ssa/recip-8.c: In
function ‘foo’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/tree-ssa/recip-8.c:7:1:
error: statement marked for throw, but doesn’t
7 | foo (double a)
| ^~~
_6 = reciptmp.3_16;
during GIMPLE pass: recip
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/tree-ssa/recip-8.c:7:1:
internal compiler error: verify_gimple failed
0xd4dd8b verify_gimple_in_cfg(function*, bool)
/home/marxin/Programming/gcc/gcc/tree-cfg.c:5386
0xc289ff execute_function_todo
/home/marxin/Programming/gcc/gcc/passes.c:1977
0xc2993e execute_todo
/home/marxin/Programming/gcc/gcc/passes.c:2031
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Subject: [Bug sanitizer/90090] [7/8/9 Regression] ICE in mark_reachable_handlers, at tree-eh.c:3938 since r219202
Date: Mon, 15 Apr 2019 06:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Last reconfirmed| |2019-4-15
Known to work| |4.9.4
Target Milestone|--- |7.5
Known to fail| |5.5.0, 6.4.0, 7.4.0, 8.3.0,
| |9.0
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Subject: [Bug rtl-optimization/90083] internal compiler error: in expand_debug_locations, at cfgexpand.c:5403 with -O3 and -g
Date: Mon, 15 Apr 2019 06:49:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup, I'll consider backporting to GCC-8 branch.
*** This bug has been marked as a duplicate of bug 88587 ***
>From gcc-bugs-return-640697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 06:49:21 2019
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Subject: [Bug middle-end/88587] ICE in expand_debug_locations, at cfgexpand.c:5450
Date: Mon, 15 Apr 2019 06:49:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nheart at gmail dot com
--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 90083 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-640698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 06:50:23 2019
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Subject: [Bug middle-end/88587] ICE in expand_debug_locations, at cfgexpand.c:5450
Date: Mon, 15 Apr 2019 06:50:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |NEW
Known to work| |9.0
Resolution|FIXED |---
Known to fail|9.0 |7.4.0, 8.3.0
>From gcc-bugs-return-640699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 06:58:13 2019
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
Date: Mon, 15 Apr 2019 06:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-15
CC| |marxin at gcc dot gnu.org
Known to work| |6.4.0
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Target Milestone|--- |8.4
Summary|ICE with deep templates |[7/8/9 Regression] ICE with
|caused by overflow [PATCH] |deep templates caused by
| |overflow [PATCH]
Ever confirmed|0 |1
Known to fail| |7.4.0, 8.3.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with my commit r236888.
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
Date: Mon, 15 Apr 2019 06:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.4 |7.5
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Mon, 15 Apr 2019 06:59:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please attach also original (unreduced pre-processed test-case),
ideally created with GCC8?
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Subject: [Bug gcov-profile/90091] New: [GCOV] code formatting lead to incorrect code coverage for "if ( expr1 || expr2) " statement
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Bug ID: 90091
Summary: [GCOV] code formatting lead to incorrect code coverage
for "if ( expr1 || expr2) " statement
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: yangyibiao at nju dot edu.cn
CC: marxin at gcc dot gnu.org
Target Milestone: ---
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --enable-languages=c,c++
--disable-multilib --prefix=/usr/local/gcc-trunk
Thread model: posix
gcc version 9.0.1 20190414 (experimental) (GCC)
$ cat small.c
long f1(long a){return a&0xff000000L;}
long f2(long a){return a&~0xff000000L;}
void main ()
{
long a = 0x89ABCDEF;
if (f1(a)!=0x89000000L||
f2(a)!=0x00ABCDEFL)
abort();
exit(0);
}
$ gcc -w -O0 --coverage small.c; ./a.out; gcov small.c; cat small.c.gcov
File 'small.c'
Lines executed:87.50% of 8
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
1: 1:long f1(long a){return a&0xff000000L;}
1: 2:long f2(long a){return a&~0xff000000L;}
-: 3:
1: 4:void main ()
-: 5:{
1: 6: long a = 0x89ABCDEF;
-: 7:
2: 8: if (f1(a)!=0x89000000L||
1: 9: f2(a)!=0x00ABCDEFL)
#####: 10: abort();
1: 11: exit(0);
-: 12:}
Line #8 is wrongly marked as executed twice.
When Line #8 and Line #9 is in the same code line, the code coverage report is
correct as follows:
$ gcc -w -O0 --coverage small.c; ./a.out; gcov small.c; cat small.c.gcov
libgcov profiling error:/home/yyb/cv-emi/small.gcda:overwriting an existing
profile data with a different timestamp
File 'small.c'
Lines executed:85.71% of 7
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
1: 1:long f1(long a){return a&0xff000000L;}
1: 2:long f2(long a){return a&~0xff000000L;}
-: 3:
1: 4:void main ()
-: 5:{
1: 6: long a = 0x89ABCDEF;
-: 7:
1: 8: if (f1(a)!=0x89000000L||f2(a)!=0x00ABCDEFL)
#####: 9: abort();
1: 10: exit(0);
-: 11:}
>From gcc-bugs-return-640703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 07:31:30 2019
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90020] [7/8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Mon, 15 Apr 2019 07:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90020
--- Comment #15 from rguenther at suse dot de <rguenther at suse dot de> ---
On Sat, 13 Apr 2019, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90020
>
> --- Comment #14 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The test gcc.dg/torture/pr90020.c fails on darwin:
>
> Undefined symbols for architecture x86_64:
> "_x", referenced from:
> _main in ccemobuO.o
> ld: symbol(s) not found for architecture x86_64
> collect2: error: ld returned 1 exit status
/* { dg-require-weak "" } */
was supposed to make it UNSUPPORTED on targets where it doesn't work.
>From gcc-bugs-return-640705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 07:42:42 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/90091] [GCOV] code formatting lead to incorrect code coverage for "if ( expr1 || expr2) " statement
Date: Mon, 15 Apr 2019 07:42:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-15
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's a real limitation where '||' is on a different line than
f2(a)!=0x00ABCDEFL.
following works:
1: 1:long f1(long a){return a&0xff000000L;}
1: 2:long f2(long a){return a&~0xff000000L;}
-: 3:
1: 4:void main ()
-: 5:{
1: 6: long a = 0x89ABCDEF;
-: 7:
1: 8: if (f1(a)!=0x89000000L
1: 9: || f2(a)!=0x00ABCDEFL)
#####: 10: abort();
1: 11: exit(0);
-: 12:}
>From gcc-bugs-return-640704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 07:42:33 2019
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90020] [7/8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Mon, 15 Apr 2019 07:42:00 -0000
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--- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> /* { dg-require-weak "" } */
>
> was supposed to make it UNSUPPORTED on targets where it doesn't work.
Apparently this not enough. From gcc.dg/attr-weakref-1.c I see
// { dg-additional-options "-Wl,-undefined,dynamic_lookup" { target *-*-darwin*
} }
// { dg-additional-options "-Wl,-flat_namespace" { target *-*-darwin[89]* } }
The test links on x86_64-apple-darwin18 if I add -Wl,-undefined,dynamic_lookup.
>From gcc-bugs-return-640706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 07:43:28 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/90090] [7/8/9 Regression] ICE in mark_reachable_handlers, at tree-eh.c:3938 since r219202
Date: Mon, 15 Apr 2019 07:43:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/tree-ssa-math-opts.c.jj 2019-04-08 10:11:28.620219138 +0200
+++ gcc/tree-ssa-math-opts.c 2019-04-15 09:42:22.173868303 +0200
@@ -334,7 +334,8 @@ is_division_by (gimple *use_stmt, tree d
/* Do not recognize x / x as valid division, as we are getting
confused later by replacing all immediate uses x in such
a stmt. */
- && gimple_assign_rhs1 (use_stmt) != def;
+ && gimple_assign_rhs1 (use_stmt) != def
+ && !stmt_can_throw_internal (cfun, use_stmt);
}
/* Return TRUE if USE_STMT is a multiplication of DEF by A. */
@@ -367,13 +368,12 @@ is_division_by_square (gimple *use_stmt,
{
if (gimple_code (use_stmt) == GIMPLE_ASSIGN
&& gimple_assign_rhs_code (use_stmt) == RDIV_EXPR
- && gimple_assign_rhs1 (use_stmt) != gimple_assign_rhs2 (use_stmt))
+ && gimple_assign_rhs1 (use_stmt) != gimple_assign_rhs2 (use_stmt)
+ && !stmt_can_throw_internal (cfun, use_stmt))
{
tree denominator = gimple_assign_rhs2 (use_stmt);
if (TREE_CODE (denominator) == SSA_NAME)
- {
- return is_square_of (SSA_NAME_DEF_STMT (denominator), def);
- }
+ return is_square_of (SSA_NAME_DEF_STMT (denominator), def);
}
return 0;
}
fixes this.
>From gcc-bugs-return-640707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 07:44:46 2019
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Subject: [Bug tree-optimization/90020] [7/8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Mon, 15 Apr 2019 07:44:00 -0000
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--- Comment #17 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 15 Apr 2019, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90020
>
> --- Comment #16 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > /* { dg-require-weak "" } */
> >
> > was supposed to make it UNSUPPORTED on targets where it doesn't work.
>
> Apparently this not enough. From gcc.dg/attr-weakref-1.c I see
>
> // { dg-additional-options "-Wl,-undefined,dynamic_lookup" { target *-*-darwin*
> } }
> // { dg-additional-options "-Wl,-flat_namespace" { target *-*-darwin[89]* } }
>
> The test links on x86_64-apple-darwin18 if I add -Wl,-undefined,dynamic_lookup.
Can you commit that change then? It's pre-approved since it only
affects -darwin and you tested that. Thx.
>From gcc-bugs-return-640708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 07:55:42 2019
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From: "yangyibiao at nju dot edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/90092] New: [GCOV] Wrong frequencies then the default label in switch statement is followed with no statement
Date: Mon, 15 Apr 2019 07:55:00 -0000
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Bug ID: 90092
Summary: [GCOV] Wrong frequencies then the default label in
switch statement is followed with no statement
Product: gcc
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$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --enable-languages=c,c++
--disable-multilib --prefix=/usr/local/gcc-trunk
Thread model: posix
gcc version 9.0.1 20190414 (experimental) (GCC)
$ cat small.c
int bar (int a)
{
int ret = 0;
switch (a)
{
case 1: ret = ret + 1; break;
default:
;// ret = ret + 2;
}
return ret;
}
int main ()
{
bar(1);
return 0;
}
$ gcc -w -O0 --coverage small.c; ./a.out; gcov small.c; cat small.c.gcov
File 'small.c'
Lines executed:100.00% of 9
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
1: 1:int bar (int a)
-: 2:{
1: 3: int ret = 0;
1: 4: switch (a)
-: 5: {
1: 6: case 1: ret = ret + 1; break;
1: 7: default:
-: 8: ;// ret = ret + 2;
-: 9: }
-: 10:
1: 11: return ret;
-: 12:}
-: 13:
1: 14:int main ()
-: 15:{
1: 16: bar(1);
1: 17: return 0;
-: 18:}
Line #7 is wrongly marked as executed. It should be not executed.
I am not quite sure this should be reported as a new bug report. As there has
similar bug report 85179 while a label statement is followed with no
statements.
When the "default:" statement is not empty, the result is correct as:
$ gcc -w -O0 --coverage small.c; ./a.out; gcov small.c; cat small.c.gcov
File 'small.c'
Lines executed:80.00% of 10
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
1: 1:int bar (int a)
-: 2:{
1: 3: int ret = 0;
1: 4: switch (a)
-: 5: {
1: 6: case 1: ret = ret + 1; break;
#####: 7: default:
#####: 8: ret = ret + 2;
-: 9: }
-: 10:
1: 11: return ret;
-: 12:}
-: 13:
1: 14:int main ()
-: 15:{
1: 16: bar(1);
1: 17: return 0;
-: 18:}
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Subject: [Bug middle-end/90070] Add optimization for optimizing small integer values by fp integral constant
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
For -ffast-math doing this as a float FMA is probably fastest. I'm not sure
whether doing temp1 * 5 as integer operation is any good given on archs like
Zen you'll have a FP <-> INT domain crossing.
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Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass when member of union passed to copysignf
Date: Mon, 15 Apr 2019 07:57:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |aarch64
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-15
CC| |ktkachov at gcc dot gnu.org
Known to work| |9.0
Summary|[AArch64] ICE during RTL |[7/8 Regression] [AArch64]
|pass when member of union |ICE during RTL pass when
|passed to copysignf |member of union passed to
| |copysignf
Ever confirmed|0 |1
Known to fail| |6.5.0, 7.4.1, 8.3.1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed on GCC 8 branch as well as 7 and 6 (though 6 is not longer
maintained). Trunk doesn't ICE though I don't know if it has been fixed or just
made latent
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Subject: [Bug tree-optimization/90020] [7/8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
Date: Mon, 15 Apr 2019 07:57:00 -0000
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--- Comment #18 from dominiq at gcc dot gnu.org ---
Author: dominiq
Date: Mon Apr 15 07:56:43 2019
New Revision: 270360
URL: https://gcc.gnu.org/viewcvs?rev=270360&root=gcc&view=rev
Log:
2019-04-15 Dominique d'Humieres <dominiq@gcc.gnu.org>
PR tree-optimization/90020
* gcc.dg/torture/pr90020.c: Add linker options for darwin.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr90020.c
>From gcc-bugs-return-640713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 08:00:41 2019
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Subject: [Bug tree-optimization/90071] [7/8/9 Regression] internal compiler error: SSA corruption
Date: Mon, 15 Apr 2019 08:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|NEW |ASSIGNED
CC| |rguenth at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
reassoc does this:
@@ -51,9 +75,11 @@
f:
_7 = d_20(D) != 0;
_9 = _4 < 0;
- _10 = _7 | _9;
+ _18 = (unsigned int) e_21(ab);
+ _16 = _18 + 1;
+ _14 = _16 > 1;
_17 = _4 > 1;
- _6 = _10 | _17;
+ _6 = _14 | _7;
_8 = (int) _6;
_12 = (long int) _8;
_13 = (void *) _12;
it's likely folding
_4 = e.1_3 + 1;
_9 = _4 < 0;
here. I'll take a look.
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Subject: [Bug tree-optimization/90020] [7/8 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs
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--- Comment #19 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Can you commit that change then? It's pre-approved since it only
> affects -darwin and you tested that. Thx.
Done at r270360.
Note that I cannot test the additional option for darwin[89].
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Subject: [Bug rtl-optimization/90083] internal compiler error: in expand_debug_locations, at cfgexpand.c:5403 with -O3 and -g
Date: Mon, 15 Apr 2019 08:03:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Just for the record, this PR appeared on trunk in r247830, before that it was
probably latent.
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Subject: [Bug gcov-profile/85179] [GCOV] A label followed with a blank statement is wrongly marked as not executed in Gcov
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 90092 has been marked as a duplicate of this bug. ***
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Subject: [Bug gcov-profile/90092] [GCOV] Wrong frequencies then the default label in switch statement is followed with no statement
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 85179 ***
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Subject: [Bug tree-optimization/90071] [7/8/9 Regression] internal compiler error: SSA corruption
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Matching expression match.pd:1195, generic-match.c:115
Applying pattern match.pd:1251, generic-match.c:17730
Matching expression match.pd:100, generic-match.c:22
Optimizing range tests e_21(ab) +[, 0] and +[-1, ]
into (unsigned int) e_21(ab) + 1 <= 1
Index: gcc/tree-ssa-reassoc.c
===================================================================
--- gcc/tree-ssa-reassoc.c (revision 270358)
+++ gcc/tree-ssa-reassoc.c (working copy)
@@ -2143,7 +2143,8 @@ init_range_entry (struct range_entry *r,
exp_type = boolean_type_node;
}
- if (TREE_CODE (arg0) != SSA_NAME)
+ if (TREE_CODE (arg0) != SSA_NAME
+ || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (arg0))
break;
loc = gimple_location (stmt);
switch (code)
>From gcc-bugs-return-640718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 08:14:15 2019
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Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass when member of union passed to copysignf
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
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Martin Liška <marxin at gcc dot gnu.org> changed:
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CC| |amker at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I'm adding the pass maintainer to CC.
@Walter: Do you have an account so that you'll be able to propose the patch to
GCC patches mailing list?
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-640721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 08:32:53 2019
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Subject: [Bug target/90088] 3 ops LEA should be avoided on Intel CPUs
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Target|Intel x86 |x86_64-*-* i?86-*-*
CC| |hjl at gcc dot gnu.org
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
We have two related tunables, X86_TUNE_OPT_AGU and X86_TUNE_AVOID_LEA_FOR_ADDR.
Probably related is that most uarchs have extra cost for complex addressing
modes for moves (extra uop to generate the addres). But I wasn't aware
that there's extra costs for the AGU op itself.
>From gcc-bugs-return-640722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 08:34:05 2019
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Subject: [Bug sanitizer/90090] [7/8/9 Regression] ICE in mark_reachable_handlers, at tree-eh.c:3938 since r219202
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Subject: [Bug sanitizer/90090] [7/8/9 Regression] ICE in mark_reachable_handlers, at tree-eh.c:3938 since r219202
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46165
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46165&action=edit
gcc9-pr90090.patch
Untested fix.
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Subject: [Bug middle-end/88587] ICE in expand_debug_locations, at cfgexpand.c:5450
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
Backported to GCC-8 branch, closing now.
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Subject: [Bug middle-end/88587] ICE in expand_debug_locations, at cfgexpand.c:5450
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--- Comment #16 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Mon Apr 15 08:53:24 2019
New Revision: 270365
URL: https://gcc.gnu.org/viewcvs?rev=270365&root=gcc&view=rev
Log:
Backport r268060
2019-04-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2019-01-18 Martin Liska <mliska@suse.cz>
Richard Biener <rguenther@suse.de>
PR middle-end/88587
* cgraph.h (create_version_clone_with_body): Add new argument
with attributes.
* cgraphclones.c (cgraph_node::create_version_clone): Add
DECL_ATTRIBUTES to a newly created decl. And call
valid_attribute_p so that proper cl_target_optimization_node
is set for the newly created declaration.
* multiple_target.c (create_target_clone): Set DECL_ATTRIBUTES
for declaration.
(expand_target_clones): Do not call valid_attribute_p, it must
be already done.
* tree-inline.c (copy_decl_for_dup_finish): Reset mode for
vector types.
2019-04-15 Martin Liska <mliska@suse.cz>
Backport from mainline
2019-01-18 Martin Liska <mliska@suse.cz>
PR middle-end/88587
* g++.target/i386/pr88587.C: New test.
* gcc.target/i386/mvc13.c: New test.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/cgraph.h
branches/gcc-8-branch/gcc/cgraphclones.c
branches/gcc-8-branch/gcc/multiple_target.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-inline.c
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/90074] wrong debug info at -O3
Date: Mon, 15 Apr 2019 09:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90074
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-15
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Generally loop optimizers are bad when handling debug info, most
of the time dropping them on the floor rather than changing them to resets.
In this particular case it's loop distribution:
@@ -16,33 +25,7 @@
# DEBUG i => 0
# DEBUG BEGIN_STMT
# DEBUG i => 0
-
- <bb 3> [local count: 719407024]:
- # i_14 = PHI <0(2), i_8(5)>
- # ivtmp_4 = PHI <7(2), ivtmp_1(5)>
- # DEBUG c => NULL
- # DEBUG i => NULL
- # DEBUG i => i_14
- # DEBUG c => NULL
- # DEBUG c => 0
- # DEBUG BEGIN_STMT
- b[i_14][0] = 0;
- # DEBUG c => 1
- # DEBUG c => NULL
- # DEBUG c => 1
- i_8 = i_14 + 1;
- # DEBUG i => i_8
- # DEBUG i => i_8
- ivtmp_1 = ivtmp_4 - 1;
- if (ivtmp_1 != 0)
- goto <bb 5>; [0.00%]
- else
- goto <bb 4>; [100.00%]
-
- <bb 5> [local count: 0]:
- goto <bb 3>; [100.00%]
-
- <bb 4> [local count: 719407023]:
+ __builtin_memset (&b, 0, 14);
# DEBUG BEGIN_STMT
optimize_me_not ();
it's not "easy" to fix things up here, but loop-distribution uses
delete_basic_block and edge redirection which bypasses CFG cleanup
ability to eventually handle this better.
I have a patch.
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From: "Bader at lrz dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/90093] New: Extended C interop: optional argument incorrectly identified as PRESENT
Date: Mon, 15 Apr 2019 09:25:00 -0000
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Bug ID: 90093
Summary: Extended C interop: optional argument incorrectly
identified as PRESENT
Product: gcc
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Created attachment 46166
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46166&action=edit
UNIX archive with test case
The attached test code can be compiled with
gcc -c optional_02_pos.c
gfortran optional_02_pos.f90 optional_02_pos.o
and produces the output
FAIL 2 T T T
The cause of this is that the call of the procedure from C with NULL as
first argument is incorrectly treated.
This appears to be a regression of the most recent fixes for the C descriptor.
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Subject: [Bug ipa/88936] [7/8/9 Regression] -fipa-pta breaks bash (incorrect optimisation of recursive static function)
Date: Mon, 15 Apr 2019 10:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88936
--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 15 10:09:08 2019
New Revision: 270366
URL: https://gcc.gnu.org/viewcvs?rev=270366&root=gcc&view=rev
Log:
2019-04-15 Richard Biener <rguenther@suse.de>
PR ipa/88936
* tree.h (auto_var_p): Declare.
* tree.c (auto_var_p): New function, split out from ...
(auto_var_in_fn_p): ... here.
* tree-ssa-structalias.c (struct variable_info): Add shadow_var_uid
member.
(new_var_info): Initialize it.
(set_uids_in_ptset): Also set the shadow variable uid if required.
(ipa_pta_execute): Postprocess points-to solutions assigning
shadow variable uids for locals that may reach their containing
function recursively.
* tree-ssa-ccp.c (fold_builtin_alloca_with_align): Do not
assert but instead check whether the points-to solution is
a singleton.
* gcc.dg/torture/pr88936-1.c: New testcase.
* gcc.dg/torture/pr88936-2.c: Likewise.
* gcc.dg/torture/pr88936-3.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr88936-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr88936-2.c
trunk/gcc/testsuite/gcc.dg/torture/pr88936-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-ccp.c
trunk/gcc/tree-ssa-structalias.c
trunk/gcc/tree.c
trunk/gcc/tree.h
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Subject: [Bug ipa/88936] [7/8 Regression] -fipa-pta breaks bash (incorrect optimisation of recursive static function)
Date: Mon, 15 Apr 2019 10:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 Regression] |[7/8 Regression] -fipa-pta
|-fipa-pta breaks bash |breaks bash (incorrect
|(incorrect optimisation of |optimisation of recursive
|recursive static function) |static function)
Known to fail|9.0 |
--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug rtl-optimization/90082] [9 Regression] ICE in delete_unmarked_insns, at dce.c:653
Date: Mon, 15 Apr 2019 10:18:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that in this case can_alter_cfg is false (fast DCE), and we have
a
(call_insn/u 27 25 38 2 (set (reg:SI 0 ax)
(call (mem:QI (symbol_ref:DI ("__mulvsi3") [flags 0x41]) [0 S1 A8])
(const_int 0 [0]))) "pr90082.c":7:28 677 {*call_value}
(expr_list:REG_DEAD (reg:SI 5 di)
(expr_list:REG_DEAD (reg:SI 4 si)
(expr_list:REG_UNUSED (reg:SI 0 ax)
(nil))))
(expr_list (use (reg:SI 4 si))
(expr_list (use (reg:SI 5 di))
(nil))))
call that DCE would like to remove. The assert is that we really don't remove
unreachable blocks etc. when we don't want to alter the cfg; the call is
nothrow_insn_p and so we think it is fine to remove it, but it isn't if we
can't modify the cfg - there are EDGE_ABNORMAL edges after the call.
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Subject: [Bug middle-end/67809] Empty pointer-chasing loops aren't optimized out
Date: Mon, 15 Apr 2019 10:25:00 -0000
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--- Comment #7 from Gareth Lloyd <gareth@ignition-web.co.uk> ---
To give extra context, this optimization is desirable when using
pmr::monotonic_buffer_resource. After de-virtualization and inlining it is
likely for node based containers with trivially destructible internal types
will end up with empty loops in their destructors.
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Subject: [Bug rtl-optimization/90082] [9 Regression] ICE in delete_unmarked_insns, at dce.c:653
Date: Mon, 15 Apr 2019 10:25:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46167
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gcc9-pr90082.patch
Untested fix.
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Subject: [Bug middle-end/67809] Empty pointer-chasing loops aren't optimized out
Date: Mon, 15 Apr 2019 10:34:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
So it's legal to remove the classical "halt CPU" while (1);? Interesting...
Does this apply to C++ only?
I presume for libstdc++ we could add a
#pragma GCC loop finite
which tells GCC it can assume the loop eventually terminates.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/67809] Empty pointer-chasing loops aren't optimized out
Date: Mon, 15 Apr 2019 10:38:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
clang doesn't optimize the corresponding C testcase
struct Foo {
struct Foo *next;
};
void release(struct Foo *next) {
struct Foo *tmp = 0;
for (struct Foo *it = next; it; it = tmp) {
tmp = it->next;
}
}
which means it needs to have a way in the IL to annotate loops as
terminating.
Does the C++ rule apply to all cycles or just to "loops"? (thinking
of goto, recursion, etc.)
>From gcc-bugs-return-640735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 10:44:23 2019
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From: "harald at gigawatt dot nl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Mon, 15 Apr 2019 10:44:00 -0000
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Harald van Dijk <harald at gigawatt dot nl> changed:
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----------------------------------------------------------------------------
CC| |harald at gigawatt dot nl
--- Comment #4 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to Martin Sebor from comment #3)
> UINT8_C(-5) isn't valid but expanding the macros to their arguments isn't
> conforming either. C11 DR #456 suggests compiler magic is necessary to make
> the macros correct:
> http://www.open-std.org/jtc1/sc22/wg14/www/docs/summary.htm#dr_456 (Also see
> C99 DR 209: http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_209.htm).
It doesn't seem like compiler magic is really needed:
#define UINT8_C(x) ((__uint8_t) +(x##U))
This works correctly even in #if expressions because of the replacement of
__uint8_t by 0.
>From gcc-bugs-return-640736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 11:05:46 2019
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Subject: [Bug target/90094] New: better handling of x == LONG_MIN on x86-64
Date: Mon, 15 Apr 2019 11:05:00 -0000
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Bug ID: 90094
Summary: better handling of x == LONG_MIN on x86-64
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Compile the following on x86-64:
unsigned f(long a)
{
return a == LONG_MIN;
}
The result for -O3 is:
f: movabs $0x8000000000000000,%rax
cmp %rax,%rdi
sete %al
movzbl %al,%eax
retq
With -Os it looks like this:
f: mov $0x1,%eax
shl $0x3f,%rax
cmp %rax,%rdi
sete %al
movzbl %al,%eax
retq
I think for both optimization directions the code should be compiled as if for
this:
unsigned f(long a)
{
long r;
return __builtin_sub_overflow(a, 1, &r);
}
This compiled to
f: xor %eax,%eax
add $0xffffffffffffffff,%rdi
seto %al
retq
This should be faster and is definitely shorter than even the -Os version.
For 32-bit x86 the problem doesn't exist is this form, I think. But it might
apply to some RISC targets as well.
>From gcc-bugs-return-640737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 11:09:35 2019
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Subject: [Bug middle-end/90070] Add optimization for optimizing small integer values by fp integral constant
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64le-gnu-linux, |powerpc*-*-*
|powerpc64-gnu-linux |
Host|powerpc64le-gnu-linux, |
|powerpc64-gnu-linux |
Build|powerpc64le-gnu-linux, |
|powerpc64-gnu-linux |
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
You'll have a crossing anyway (it is y+5*x with x an integer and y a float),
but a single fma is faster than doing the mul as integer, almost everywhere.
When we write e.g.
float f(float x) { return 5.0 * x; }
GCC is smart enough to do the mul in single precision (although C says it is
double precision, and only later rounded to SP, the result is identical)"
addis 9,2,.LC0@toc@ha
lfs 0,.LC0@toc@l(9)
fmuls 1,1,0
blr
but for
float f(float x, float y) { return 5.0*x + y; }
it does not (and AFAICS it gives identical results here, too, even without
-ffast-math, which makes no difference currently):
addis 9,2,.LC1@toc@ha
lfd 0,.LC1@toc@l(9)
fmadd 1,1,0,2
frsp 1,1
blr
>From gcc-bugs-return-640738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 11:21:00 2019
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Subject: [Bug tree-optimization/90095] New: [9 Regression] wrong code with -Os -fno-tree-bit-ccp
Date: Mon, 15 Apr 2019 11:21:00 -0000
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Bug ID: 90095
Summary: [9 Regression] wrong code with -Os -fno-tree-bit-ccp
Product: gcc
Version: 9.0
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Target: i686-pc-linux-gnu
Created attachment 46168
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46168&action=edit
reduced testcase
Output:
$ i686-pc-linux-gnu-gcc -Os -fno-tree-bit-ccp
$ ./a.out
Aborted
The multiplication does not overflow, but the generated code indicates it
overflows.
$ i686-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-i686/bin/i686-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-270358-checking-yes-rtl-df-extra-i686/bin/../libexec/gcc/i686-pc-linux-gnu/9.0.1/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --with-sysroot=/usr/i686-pc-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=i686-pc-linux-gnu --with-ld=/usr/bin/i686-pc-linux-gnu-ld
--with-as=/usr/bin/i686-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-270358-checking-yes-rtl-df-extra-i686
Thread model: posix
gcc version 9.0.1 20190415 (experimental) (GCC)
>From gcc-bugs-return-640739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 11:34:05 2019
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Subject: [Bug rtl-optimization/89794] combine incorrectly forwards register value through auto-inc operation
Date: Mon, 15 Apr 2019 11:34:00 -0000
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Mon Apr 15 11:33:29 2019
New Revision: 270368
URL: https://gcc.gnu.org/viewcvs?rev=270368&root=gcc&view=rev
Log:
combine: Count auto_inc properly (PR89794)
The code that checks if an auto-increment from i0 or i1 is not lost is
a bit shaky. The code to check the same for i2 is non-existent, and
cannot be implemented in a similar way at all. So, this patch counts
all auto-increments, and makes sure we end up with the same number as
we started with. This works because we still have a check that we
will not duplicate any.
We should do this some better way, but not while we are in stage 4.
PR rtl-optimization/89794
* combine.c (count_auto_inc): New function.
(try_combine): Count how many auto_inc expressions there were in the
original instructions. Ensure we have the same number in the new
instructions. Remove the code that tried to ensure auto_inc side
effects on i1 and i0 are not lost.
gcc/testsuite/
PR rtl-optimization/89794
* gcc.dg/torture/pr89794.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr89794.c
Modified:
trunk/ChangeLog
trunk/gcc/combine.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 11:39:48 2019
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Subject: [Bug d/90063] druntime DSO first assertion fails on Solaris/SPARC
Date: Mon, 15 Apr 2019 11:39:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Rainer Orth <ro at gcc dot gnu.org> ---
(In reply to ibuclaw from comment #1)
> After others have been committed, can you post a new stacktrace for this?
After the move to gcc/sections, rt/bss_section.c is gone and so are both
rt_get_bss_start and the assert. I've bootstrapped on sparc-sun-solaris2.11
with the additonal big-endian and Solaris/SPARC patches and the problem is
gone.
>From gcc-bugs-return-640741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 11:47:37 2019
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Subject: [Bug tree-optimization/90095] [8/9 Regression] wrong code with -Os -fno-tree-bit-ccp
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90095
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-15
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Target Milestone|--- |8.4
Summary|[9 Regression] wrong code |[8/9 Regression] wrong code
|with -Os -fno-tree-bit-ccp |with -Os -fno-tree-bit-ccp
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with my r259649. I'll have a look.
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Subject: [Bug tree-optimization/90095] [9 Regression] wrong code with -Os -fno-tree-bit-ccp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.4 |9.0
Summary|[8/9 Regression] wrong code |[9 Regression] wrong code
|with -Os -fno-tree-bit-ccp |with -Os -fno-tree-bit-ccp
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Subject: [Bug middle-end/90056] 548.exchange2_r regressions on AMD Zen
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 46169
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46169&action=edit
perf annotate - Ofast native vs. Ofast native PGO
I'm attaching HTML and txt perf annotate for Ofast native and Ofast native PGO
builds. As seen, it's still the same story. There's a big register pressure
that leads to spilling of some of the induction variables.
For these builds, the most significant difference is:
GOOD:
: if(block(row, 4, i4) <= 0) cycle
0.00 : 41c660: mov (%r9),%r12d
1.99 : 41c663: mov %r11d,0x80(%rsp)
0.11 : 41c66b: mov %r11d,%edx
0.02 : 41c66e: test %r12d,%r12d
0.15 : 41c671: jg 41c7b0
<__brute_force_MOD_digits_2+0xe00>
0.01 : 41c677: inc %r11
0.64 : 41c67a: add $0x144,%r9
0.13 : 41c681: add $0x144,%r8
0.05 : 41c688: add $0x144,%r10
: do i4 = l(4), u(4)
0.15 : 41c68f: cmp %r11d,0x6c(%rsp)
2.39 : 41c694: jge 41c660
<__brute_force_MOD_digits_2+0xcb0>
0.00 : 41c696: mov 0x168(%rsp),%r10
0.55 : 41c69e: mov 0x170(%rsp),%r9
0.08 : 41c6a6: mov 0x178(%rsp),%r11
0.05 : 41c6ae: mov 0x180(%rsp),%r8
: block(row, 4:9, i3) = block(row, 4:9, i3) + 10
BAD:
: if(block(row, 4, i4) <= 0) cycle
0.05 : 41a8b0: mov (%r11),%edi
0.78 : 41a8b3: mov %r10d,0x84(%rsp)
0.04 : 41a8bb: mov %r10d,%r13d
0.01 : 41a8be: test %edi,%edi
0.26 : 41a8c0: jg 41aa10
<__brute_force_MOD_digits_2+0x1210>
0.44 : 41a8c6: addq $0x144,0x48(%rsp)
4.04 : 41a8cf: addq $0x144,0x58(%rsp)
1.31 : 41a8d8: inc %r10
0.02 : 41a8db: add $0x144,%r11
: do i4 = l(4), u(4)
0.01 : 41a8e2: cmp %r10d,0x88(%rsp)
0.25 : 41a8ea: jge 41a8b0
<__brute_force_MOD_digits_2+0x10b0>
: block(row, 4:9, i3) = block(row, 4:9, i3) + 10
0.03 : 41a8ec: mov 0xd0(%rsp),%r15
0.27 : 41a8f4: addl $0xa,-0xdc(%r15)
0.20 : 41a8fc: addl $0xa,-0xb8(%r15)
0.01 : 41a904: addl $0xa,-0x94(%r15)
0.07 : 41a90c: addl $0xa,-0x70(%r15)
0.05 : 41a911: addl $0xa,-0x4c(%r15)
0.06 : 41a916: addl $0xa,-0x28(%r15)
The benchmark is quite unpredictable, I'm leaving that for now.
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Subject: [Bug tree-optimization/90071] [7/8/9 Regression] internal compiler error: SSA corruption
Date: Mon, 15 Apr 2019 11:59:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 15 11:59:02 2019
New Revision: 270369
URL: https://gcc.gnu.org/viewcvs?rev=270369&root=gcc&view=rev
Log:
2019-04-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/90071
* tree-ssa-reassoc.c (init_range_entry): Do not pick up
abnormal operands from def stmts.
* gcc.dg/torture/pr90071.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr90071.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-reassoc.c
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Subject: [Bug target/90096] New: Misleading option hint for AVX intrinsics
Date: Mon, 15 Apr 2019 12:09:00 -0000
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Bug ID: 90096
Summary: Misleading option hint for AVX intrinsics
Product: gcc
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I see following misleading hint for:
$ cat /tmp/avx512.c
#include <x86intrin.h>
volatile __m512i x1, x2;
volatile __mmask64 m64;
int foo(int i) {
x1 = _mm512_gf2p8affineinv_epi64_epi8(x1, x2, 3);
return 4;
}
$ ./xgcc -B. /tmp/avx512.c -c
In file included from ./include/immintrin.h:117,
from ./include/x86intrin.h:32,
from /tmp/avx512.c:1:
/tmp/avx512.c: In function ‘foo’:
/tmp/avx512.c:6:10: error: ‘__builtin_ia32_vgf2p8affineinvqb_v64qi’ needs isa
option -m32 -mgfni -mavx512f
6 | x1 = _mm512_gf2p8affineinv_epi64_epi8(x1, x2, 3);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Where '-m32' is not needed of course:
$ ./xgcc -B. /tmp/avx512.c -c -mgfni -mavx512f
[OK]
It's caused by:
gcc/config/i386/gfniintrin.h-__attribute__((__gnu_inline__, __always_inline__,
__artificial__))
gcc/config/i386/gfniintrin.h:_mm512_gf2p8affineinv_epi64_epi8 (__m512i __A,
__m512i __B, const int __C)
gcc/config/i386/gfniintrin.h-{
gcc/config/i386/gfniintrin.h- return (__m512i)
__builtin_ia32_vgf2p8affineinvqb_v64qi ((__v64qi) __A,
gcc/config/i386/gfniintrin.h-
(__v64qi) __B, __C);
gcc/config/i386/gfniintrin.h-}
gcc/config/i386/gfniintrin.h-
Is it something we can improve?
Clang for instance prints:
clang /tmp/avx512.c
/tmp/avx512.c:6:10: error: '__builtin_ia32_vgf2p8affineinvqb_v64qi' needs
target feature avx512bw,gfni
x1 = _mm512_gf2p8affineinv_epi64_epi8(x1, x2, 3);
^
/usr/lib64/clang/8.0.0/include/gfniintrin.h:64:12: note: expanded from macro
'_mm512_gf2p8affineinv_epi64_epi8'
(__m512i)__builtin_ia32_vgf2p8affineinvqb_v64qi((__v64qi)(__m512i)(A),
\
^
1 error generated.
Apparently they use macros instead of gnu_inline attributes.
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--- Comment #10 from Marc Glisse <glisse at gcc dot gnu.org> ---
"Forward progress [intro.progress]
The implementation may assume that any thread will eventually do one of the
following:
(1.1) — terminate,
(1.2) — make a call to a library I/O function,
(1.3) — perform an access through a volatile glvalue, or
(1.4) — perform a synchronization operation or an atomic operation.
[Note: This is intended to allow compiler transformations such as removal of
empty loops, even when termination cannot be proven. — end note]"
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Subject: [Bug target/90096] Misleading option hint for AVX intrinsics
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2019-4-15
CC| |hjl.tools at gmail dot com,
| |hubicka at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Host| |x86_64-linux-gnu
Target Milestone|--- |10.0
Severity|normal |enhancement
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Subject: [Bug ipa/89693] [9 Regression] ICE: verify_cgraph_node failed (error: edge points to wrong declaration)
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jamborm at gcc dot gnu.org
--- Comment #6 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed on trunk, I am in the process of testing a straightforward backport to
GCC 8.
>From gcc-bugs-return-640749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 12:14:12 2019
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Subject: [Bug ipa/89693] [9 Regression] ICE: verify_cgraph_node failed (error: edge points to wrong declaration)
Date: Mon, 15 Apr 2019 12:14:00 -0000
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--- Comment #7 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Te commit did not appear here because I made a pasto in the commit message, the
fix landed as:
URL: https://gcc.gnu.org/viewcvs?rev=270364&root=gcc&view=rev
Log:
Reorganize cgraph_node::clone_of_p
2019-04-15 Martin Jambor <mjambor@suse.cz>
PR ipa/pr89693
* cgraph.c (clone_of_p): Loop over clone chain for each step in
the thunk chain.
testsuite/
* g++.dg/ipa/pr89693.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ipa/pr89693.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraph.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/89940] [7/8 Regression] Template substitution causes segfault
Date: Mon, 15 Apr 2019 12:18:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |aoliva at gcc dot gnu.org,
| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r241425 and was fixed on trunk in r267251.
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Mon, 15 Apr 2019 12:24:00 -0000
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--- Comment #47 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #43)
> does anybody know what is the Ada and/or D syntax for that?
Syntax for what?
I fear we need eagerly load all vector registers before calling the personality
routine.
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Subject: [Bug debug/90074] wrong debug info at -O3
Date: Mon, 15 Apr 2019 12:26:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 15 12:26:11 2019
New Revision: 270370
URL: https://gcc.gnu.org/viewcvs?rev=270370&root=gcc&view=rev
Log:
2019-04-15 Richard Biener <rguenther@suse.de>
PR debug/90074
* tree-loop-distribution.c (destroy_loop): Preserve correct
debug info.
* gcc.dg/guality/pr90074.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/guality/pr90074.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-loop-distribution.c
>From gcc-bugs-return-640753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 12:41:36 2019
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Subject: [Bug debug/90074] wrong debug info at -O3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |9.0
Version|unknown |9.0
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug tree-optimization/90071] [7/8 Regression] internal compiler error: SSA corruption
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 Regression] internal |[7/8 Regression] internal
|compiler error: SSA |compiler error: SSA
|corruption |corruption
Known to fail| |7.4.0, 8.3.0
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug tree-optimization/90055] [7 Regression] Incorrect result with ffast-math + tree-vectorize
Date: Mon, 15 Apr 2019 12:44:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> (In reply to Martin Liška from comment #2)
> > Fixed on trunk with r250959 which is:
> >
> > 364bc5b93b76cf88(08 Aug 2017 14:09): [took: 2.844s] result: OK
> > sum: 0.0000
> > SVN revision: 250959
> > Author: amker
> > * doc/invoke.texi: Document -ftree-loop-distribution for O3.
> > * opts.c (default_options_table): Add OPT_ftree_loop_distribution.
> >
> >
> > git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@250959
> > 138bc75d-0d04-0410-961f-82ee72b054a4
> >
> > Using:
> > gcc pr90055.c -O3 -ffast-math -march=haswell -mtune=haswell
> > -fno-tree-loop-distribution
> >
> > it disappeared in r253934:
> >
> > Author: hubicka
> > * x86-tune-costs.h (core_cost): Fix div, move and sqrt latencies.
>
> Those look like they are all would cause the issue to go latent.
>
> >
> > and it started with r238033.
>
> This one does it might be the real cause of the issue.
Nope, it just does less peeling for gaps.
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From: "mateusz.pusz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90099] New: [P0732] Partial specialization of a class template with variadic parameter pack fails after adding non-type template parameter
Date: Mon, 15 Apr 2019 13:09:00 -0000
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Bug ID: 90099
Summary: [P0732] Partial specialization of a class template
with variadic parameter pack fails after adding
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Product: gcc
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Target Milestone: ---
Hi,
Compiling the code provided below with the following options produces an error:
"-std=c++2a -Wall -Wextra"
```
struct Unit {
int value;
// auto operator<=>(const Unit&) = default;
};
template<Unit U, typename... Ts>
struct X {};
template<Unit U, typename T, typename... Rest>
struct X<U, T, Rest...> {};
```
Error:
<source>:10:8: error: template argument '((Unit*)(void)0)->Unit::__ct_comp
(((const Unit)U))' involves template parameter(s)
10 | struct X<U, T, Rest...> {};
| ^~~~~~~~~~~~~~~~
See also here:
https://godbolt.org/z/OdmHCf
Best
Mat
>From gcc-bugs-return-640759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 13:09:58 2019
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From: "mateusz.pusz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90100] New: [P0732] Cannot write a type-trait matching non-type class template parameters
Date: Mon, 15 Apr 2019 13:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90100
Bug ID: 90100
Summary: [P0732] Cannot write a type-trait matching non-type
class template parameters
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: mateusz.pusz at gmail dot com
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Hi,
Compiling the code provided below with the following options produces an error:
"-std=c++2a -Wall -Wextra"
```
template<typename T>
inline constexpr bool is_nontype_list = false;
template<template<auto...> typename T, auto... NonTypes>
inline constexpr bool is_nontype_list<T<NonTypes...>> = true;
template<typename T>
concept bool NonTypeList = is_nontype_list<T>;
// works
template<auto...>
struct A {};
static_assert(is_nontype_list<A<1, 2, 3>>);
// fails
struct X {
int v;
};
static_assert(is_nontype_list<A<X{1}, X{2}, X{3}>>);
```
See also: https://godbolt.org/z/56PLu-
Best
Mat
>From gcc-bugs-return-640756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 13:09:38 2019
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From: "mateusz.pusz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90097] New: [P0732] Error while comparing 2 non-type parameters in constraints
Date: Mon, 15 Apr 2019 13:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90097
Bug ID: 90097
Summary: [P0732] Error while comparing 2 non-type parameters in
constraints
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mateusz.pusz at gmail dot com
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Hi,
Compiling the code provided below with the following options produces an error:
"-std=c++2a -fconcepts -Wall -Wextra"
```
struct B {
int value;
// auto operator<=>(const base_dimension&) = default;
friend constexpr bool operator==(const B& lhs, const B& rhs) noexcept {
return lhs.value == rhs.value; }
};
//works
template<int i1, int i2>
requires (i1 == i2)
struct A {};
// works
template<B b1, B b2, bool BB = (b1 == b2)>
struct C {
static_assert(b1 == b2);
};
// error
template<B b1, B b2>
requires (b1 == b2)
struct D {};
```
Error:
<source>:24:16: error: constraint 'operator==(((const B)b1), ((const B)b2))',
uses overloaded operator
24 | requires (b1 == b2)
| ~~~~^~~~~~
I am not sure what is the offcial suport -fconcepts and if that problem can be
ignored for now or not so I decided to report it anyway ;-)
See also here: https://godbolt.org/z/PLkvVm.
Thanks
Mat
>From gcc-bugs-return-640757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 13:09:48 2019
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From: "mateusz.pusz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90098] New: [P0732] Partial specialization of a class template with variadic parameter pack fails
Date: Mon, 15 Apr 2019 13:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90098
Bug ID: 90098
Summary: [P0732] Partial specialization of a class template
with variadic parameter pack fails
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mateusz.pusz at gmail dot com
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Hi,
Compiling the code provided below with the following options produces an error:
"-std=c++2a -Wall -Wextra"
```
// works
template<typename... Ts>
struct X {};
template<typename T, typename... Rest>
struct X<T, Rest...> {};
// works
template<int... Is>
struct Y {};
template<int I, int... Rest>
struct Y<I, Rest...> {};
// error
struct A {
int value;
// auto operator<=>(const A&) = default;
};
template<A... Us>
struct Z {};
template<A V, A... Rest>
struct Z<V, Rest...> {};
```
Error:
<source>:25:8: error: partial specialization 'struct
Z<((A*)(void)0)->A::__ct_comp (((const A)V)), (const A)Rest ...>' is not more
specialized than [-fpermissive]
25 | struct Z<V, Rest...> {};
| ^~~~~~~~~~~~~
<source>:22:8: note: primary template 'template<A ...Us> struct Z'
22 | struct Z {};
| ^
<source>:25:8: error: template argument '((A*)(void)0)->A::__ct_comp (((const
A)V))' involves template parameter(s)
25 | struct Z<V, Rest...> {};
| ^~~~~~~~~~~~~
<source>:25:8: error: template argument '(const A)Rest' involves template
parameter(s)
See also: https://godbolt.org/z/G96q1_.
Best
Mat
>From gcc-bugs-return-640760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 13:10:02 2019
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From: "mateusz.pusz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90101] New: [P0732]
Date: Mon, 15 Apr 2019 13:10:00 -0000
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Bug ID: 90101
Summary: [P0732]
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Hi,
Compiling the code provided below with the following options produces an error:
"-std=c++2a -Wall -Wextra"
```
template<typename List>
struct A;
template<template<auto...> typename List>
struct A<List<>> {};
template<template<auto...> typename List, auto V>
struct A<List<V>> {};
template<auto>
struct B {};
// works
A<B<1>> a1;
// error
struct X {
int value;
};
A<B<X{1}>> a2;
```
Error:
<source>:20:12: error: aggregate 'A<B<X{1}> > a2' has incomplete type and
cannot be defined
20 | A<B<X{1}>> a2;
| ^~
See also: https://godbolt.org/z/QSRjFb
Best
Mat
>From gcc-bugs-return-640761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 13:15:33 2019
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From: "terra at gnome dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90102] New: Incorrect ambiguous overload with _GLIBCXX_DEBUG
Date: Mon, 15 Apr 2019 13:15:00 -0000
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Bug ID: 90102
Summary: Incorrect ambiguous overload with _GLIBCXX_DEBUG
Product: gcc
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Created attachment 46170
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46170&action=edit
Preprocessed source code
The following code fails to compile with the debugging version of
containers. It's fine with the regular version.
Problem could be in either compiler or library. Assigning to c++ component for
now.
$ cat bbb.C
#include <vector>
class Foo {
public:
template<class Cont,
class Check = decltype(std::declval<Cont>().clear())>
operator Cont () const { return {}; }
};
std::vector<int> bar() {
return static_cast<std::vector<int>> (Foo());
}
$ /usr/local/products/gcc/8.2.0/bin/g++ -c bbb.C
[Nothing]
$ /usr/local/products/gcc/8.2.0/bin/g++ -D_GLIBCXX_DEBUG -c bbb.C
bbb.C: In function ‘std::__debug::vector<int> bar()’:
bbb.C:11:46: error: call of overloaded ‘vector(Foo)’ is ambiguous
return static_cast<std::vector<int>> (Foo());
^
In file included from
/usr/local/products/gcc/8.2.0/include/c++/8.2.0/vector:73,
from bbb.C:1:
/usr/local/products/gcc/8.2.0/include/c++/8.2.0/debug/vector:214:7: note:
candidate: ‘std::__debug::vector<_Tp, _Allocator>::vector(const _Base&) [with
_Tp = int; _Allocator = std::allocator<int>; std::__debug::vector<_Tp,
_Allocator>::_Base = std::__cxx1998::vector<int, std::allocator<int> >]’
vector(const _Base& __x)
^~~~~~
/usr/local/products/gcc/8.2.0/include/c++/8.2.0/debug/vector:196:7: note:
candidate: ‘std::__debug::vector<_Tp,
_Allocator>::vector(std::__debug::vector<_Tp, _Allocator>&&) [with _Tp = int;
_Allocator = std::allocator<int>]’
vector(vector&&) = default;
^~~~~~
/usr/local/products/gcc/8.2.0/include/c++/8.2.0/debug/vector:195:7: note:
candidate: ‘std::__debug::vector<_Tp, _Allocator>::vector(const
std::__debug::vector<_Tp, _Allocator>&) [with _Tp = int; _Allocator =
std::allocator<int>]’
vector(const vector&) = default;
^~~~~~
$ /usr/local/products/gcc/8.2.0/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/usr/local/products/gcc/8.2.0/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/products/gcc/8.2.0/lib/gcc/x86_64-suse-linux/8.2.0/lto-wrapper
Target: x86_64-suse-linux
Configured with: ../../gcc-8.2.0/configure --enable-languages=c,c++,fortran
--enable-targets=x86_64-suse-linux,i686-suse-linux
--prefix=/usr/local/products/gcc/8.2.0 --with-gnu-as
--with-as=/usr/local/products/gcc/binutils-2.30/bin/as --with-gnu-ld
--with-ld=/usr/local/products/gcc/binutils-2.30/bin/ld.bfd
--enable-threads=posix --enable-shared --enable-__cxa_atexit
--enable-libstdcxx-allocator=pool x86_64-suse-linux
Thread model: posix
gcc version 8.2.0 (GCC)
>From gcc-bugs-return-640762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 13:48:26 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/56049] [7/8/9 Regression] Simplification to constants not done
Date: Mon, 15 Apr 2019 13:48:00 -0000
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--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we are _nearly_ there on trunk. LIM has improved up to the point the only
blocker is mismatching alias-sets in mem_ref_hasher::equal and the case in
question for this PR is even handled correctly because refs arrive in the
correct order and the one we'd chose has the ref-all case we'd have to
canonicalize to anyways. So the following works (and can be slightly
enhanced).
Index: gcc/tree-ssa-loop-im.c
===================================================================
--- gcc/tree-ssa-loop-im.c (revision 270366)
+++ gcc/tree-ssa-loop-im.c (working copy)
@@ -178,7 +178,15 @@ mem_ref_hasher::equal (const im_mem_ref
&& known_eq (mem1->mem.size, obj2->size)
&& known_eq (mem1->mem.max_size, obj2->max_size)
&& mem1->mem.volatile_p == obj2->volatile_p
- && mem1->mem.ref_alias_set == obj2->ref_alias_set
+ && (mem1->mem.ref_alias_set == obj2->ref_alias_set
+ /* We are not canonicalizing alias-sets but for the
+ special-case we didn't canonicalize yet and the
+ incoming ref is a alias-set zero MEM we pick
+ the correct one already. */
+ || (!mem1->ref_canonical
+ && (TREE_CODE (obj2->ref) == MEM_REF
+ || TREE_CODE (obj2->ref) == TARGET_MEM_REF)
+ && obj2->ref_alias_set == 0))
&& types_compatible_p (TREE_TYPE (mem1->mem.ref),
TREE_TYPE (obj2->ref)));
else
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Subject: [Bug d/90079] SEGV in _aaKeys, _aaValues on 32-bit SPARC
Date: Mon, 15 Apr 2019 14:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90079
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46161|0 |1
is obsolete| |
Attachment #46162|0 |1
is obsolete| |
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 46171
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46171&action=edit
Revised working patch
>From gcc-bugs-return-640764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 14:18:49 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Mon, 15 Apr 2019 14:18:00 -0000
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--- Comment #48 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Florian Weimer from comment #47)
> (In reply to Bernd Edlinger from comment #43)
> > does anybody know what is the Ada and/or D syntax for that?
>
> Syntax for what?
I mean the Ada and D equivalent of
#pragma GCC target ("general-regs-only")
and/or
__attribute__((target("general-regs-only")))
>
> I fear we need eagerly load all vector registers before calling the
> personality routine.
I am afraid the unwind handler will probably not know which coprocessor
registers exist before the unwind code hits them.
>From gcc-bugs-return-640765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 14:22:51 2019
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Subject: [Bug fortran/90069] Polymorphic Return Type Memory Leak Without Intermediate Variable
Date: Mon, 15 Apr 2019 14:22:00 -0000
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--- Comment #2 from Brad Richardson <brichardson at structint dot com> ---
(In reply to Dominique d'Humieres from comment #1)
> Confirmed from at least 4.8 up to trunk (9.0). Why is it not a duplicate of
> pr90072?
Because pr90072 occurs even with an intermediate variable.
>From gcc-bugs-return-640766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 14:31:52 2019
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Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Mon, 15 Apr 2019 14:31:00 -0000
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--- Comment #5 from Guy Perfect <bafap5 at yahoo dot com> ---
(In reply to Harald van Dijk from comment #4)
That was my line of thinking: supplying a cast in the macro. Even in the case
of negative values being cast to unsigned types, the language spec provides a
rule for that, so the behavior is defined independent of the implementation:
"[... T]he value is converted to unsigned by adding to it one greater than the
largest number that can be represented in the unsigned integer type."
and
"In a two's-complement representation, there is no actual change in the bit
pattern except filling the high-order bits with copies of the sign bit if the
unsigned integer has greater size."
I think the ticket was marked "resolved invalid" prematurely, as there's
clearly a meaningful problem and a meaningful solution.
>From gcc-bugs-return-640767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 14:32:32 2019
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Subject: [Bug ipa/89693] [9 Regression] ICE: verify_cgraph_node failed (error: edge points to wrong declaration)
Date: Mon, 15 Apr 2019 14:32:00 -0000
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--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Mon Apr 15 14:31:57 2019
New Revision: 270371
URL: https://gcc.gnu.org/viewcvs?rev=270371&root=gcc&view=rev
Log:
Reorganize cgraph_node::clone_of_p
2019-04-15 Martin Jambor <mjambor@suse.cz>
PR ipa/89693
* cgraph.c (clone_of_p): Loop over clone chain for each step in
the thunk chain.
testsuite/
* g++.dg/ipa/pr89693.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/ipa/pr89693.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/cgraph.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 15:45:46 2019
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Subject: [Bug target/90103] New: ICE building Glibc's e_atan2f.c with -O2 -mcpu=hs38_linux -frounding-math
Date: Mon, 15 Apr 2019 15:45:00 -0000
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Bug ID: 90103
Summary: ICE building Glibc's e_atan2f.c with -O2
-mcpu=hs38_linux -frounding-math
Product: gcc
Version: 8.3.0
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Created attachment 46172
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46172&action=edit
Preprocesssed input file
# arc-unknown-linux-gnu-gcc -mcpu=hs38_linux e_atan2f.i -c -O2 -frounding-math
../sysdeps/ieee754/flt-32/e_atan2f.c: In function '__ieee754_atan2f':
../sysdeps/ieee754/flt-32/e_atan2f.c:93:1: error: unrecognizable insn:
}
^
(insn 112 111 113 25 (set (reg/v:SF 172 [ <retval> ])
(fma:SF (const_double:SF 3.0e+0 [0x0.cp+2])
(const_double:SF 7.85398185253143310546875e-1 [0x0.c90fdbp+0])
(reg:SF 58 r58))) "../sysdeps/ieee754/flt-32/e_atan2f.c":61 -1
(nil))
during RTL pass: vregs
../sysdeps/ieee754/flt-32/e_atan2f.c:93:1: internal compiler error: in
extract_insn, at recog.c:2304
0x55ed94 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/.build/arc-unknown-linux-gnu/src/gcc/gcc/rtl-error.c:108
0x55edb0 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/.build/arc-unknown-linux-gnu/src/gcc/gcc/rtl-error.c:116
0x9aa5c7 extract_insn(rtx_insn*)
/.build/arc-unknown-linux-gnu/src/gcc/gcc/recog.c:2304
0x7c258d instantiate_virtual_regs_in_insn
/.build/arc-unknown-linux-gnu/src/gcc/gcc/function.c:1599
0x7c258d instantiate_virtual_regs
/.build/arc-unknown-linux-gnu/src/gcc/gcc/function.c:1969
0x7c258d execute
/.build/arc-unknown-linux-gnu/src/gcc/gcc/function.c:2018
>From gcc-bugs-return-640769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 15:57:30 2019
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Subject: [Bug middle-end/90095] [9 Regression] wrong code with -Os -fno-tree-bit-ccp
Date: Mon, 15 Apr 2019 15:57:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46173
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46173&action=edit
gcc9-pr90095.patch
Untested fix.
>From gcc-bugs-return-640770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 16:00:24 2019
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From: "yangyibiao at nju dot edu.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/90104] New: [GCOV] Wrong coverage for variable arguments function call statement while the function is inline function
Date: Mon, 15 Apr 2019 16:00:00 -0000
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Bug ID: 90104
Summary: [GCOV] Wrong coverage for variable arguments function
call statement while the function is inline function
Product: gcc
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$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --enable-languages=c,c++
--disable-multilib --prefix=/usr/local/gcc-trunk
Thread model: posix
gcc version 9.0.1 20190414 (experimental) (GCC)
$ cat small.c
#include <stdarg.h>
extern void abort (void);
long x = 0, y = 0;
inline void __attribute__((always_inline))
f1i (va_list ap)
{
x = va_arg (ap, double);
x += va_arg (ap, long);
}
void f4 (int i, ...)
{
va_list ap;
va_start (ap, i);
switch (i)
{
case 4:
y = va_arg (ap, double);
break;
case 5:
y = va_arg (ap, double);
y += va_arg (ap, double);
break;
default:
; // abort ();
}
f1i (ap);
va_end (ap);
}
int main ()
{
f4 (4, 6.0, 9.0, 16L, 18.0);
return 0;
}
$ rm small.g*; gcc -O0 --coverage small.c -w; ./a.out; gcov small.c; cat
small.c.gcov
File 'small.c'
Lines executed:78.95% of 19
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 1:#include <stdarg.h>
-: 2:
-: 3:extern void abort (void);
-: 4:long x = 0, y = 0;
-: 5:
-: 6:inline void __attribute__((always_inline))
-: 7:f1i (va_list ap)
-: 8:{
2: 9: x = va_arg (ap, double);
1: 10: x += va_arg (ap, long);
1: 11:}
-: 12:
1: 13:void f4 (int i, ...)
-: 14:{
-: 15: va_list ap;
-: 16:
1: 17: va_start (ap, i);
1: 18: switch (i)
-: 19: {
1: 20: case 4:
1: 21: y = va_arg (ap, double);
1: 22: break;
#####: 23: case 5:
#####: 24: y = va_arg (ap, double);
#####: 25: y += va_arg (ap, double);
#####: 26: break;
1: 27: default:
-: 28: ; // abort ();
-: 29: }
-: 30: f1i (ap);
1: 31: va_end (ap);
1: 32:}
-: 33:
1: 34:int main ()
-: 35:{
1: 36: f4 (4, 6.0, 9.0, 16L, 18.0);
1: 37: return 0;
-: 38:}
Line #9 is wrongly marked as executed twice.
While Line #28 is removed, the result is correct as follows:
$ gcc -O0 --coverage small.c -w; ./a.out; gcov small.c; cat small.c.gcov
File 'small.c'
Lines executed:70.00% of 20
Creating 'small.c.gcov'
-: 0:Source:small.c
-: 0:Graph:small.gcno
-: 0:Data:small.gcda
-: 0:Runs:1
-: 1:#include <stdarg.h>
-: 2:
-: 3:extern void abort (void);
-: 4:long x = 0, y = 0;
-: 5:
-: 6:inline void __attribute__((always_inline))
-: 7:f1i (va_list ap)
-: 8:{
1: 9: x = va_arg (ap, double);
1: 10: x += va_arg (ap, long);
1: 11:}
-: 12:
1: 13:void f4 (int i, ...)
-: 14:{
-: 15: va_list ap;
-: 16:
1: 17: va_start (ap, i);
1: 18: switch (i)
-: 19: {
1: 20: case 4:
1: 21: y = va_arg (ap, double);
1: 22: break;
#####: 23: case 5:
#####: 24: y = va_arg (ap, double);
#####: 25: y += va_arg (ap, double);
#####: 26: break;
#####: 27: default:
#####: 28: abort ();
-: 29: }
-: 30: f1i (ap);
1: 31: va_end (ap);
1: 32:}
-: 33:
1: 34:int main ()
-: 35:{
1: 36: f4 (4, 6.0, 9.0, 16L, 18.0);
1: 37: return 0;
-: 38:}
>From gcc-bugs-return-640771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 16:58:43 2019
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Subject: [Bug middle-end/90070] Add optimization for optimizing small integer values by fp integral constant
Date: Mon, 15 Apr 2019 16:58:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #4)
> float f(float x, float y) { return 5.0*x + y; }
>
> it does not (and AFAICS it gives identical results here, too, even without
> -ffast-math, which makes no difference currently):
Oh that is PR 22326 ....
>From gcc-bugs-return-640772-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 17:14:43 2019
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Subject: [Bug target/90096] Misleading option hint for AVX intrinsics
Date: Mon, 15 Apr 2019 17:14:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46174
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46174&action=edit
gcc9-pr90096.patch
Untested fix.
>From gcc-bugs-return-640773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 17:34:05 2019
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
Date: Mon, 15 Apr 2019 17:34:00 -0000
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--- Comment #3 from Walter Landry <wlandry at caltech dot edu> ---
(In reply to Martin Liška from comment #2)
> I'm adding the pass maintainer to CC.
> @Walter: Do you have an account so that you'll be able to propose the patch
> to GCC patches mailing list?
The only account I have with GCC is bugzilla. I have never posted anything to
gcc-patches, but long ago I sent some messages to gcc@gcc.gnu.org. Let me know
what you want me to do.
>From gcc-bugs-return-640774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 18:01:59 2019
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From: "stoyanovmk at ornl dot gov" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90105] New: std::forward_list::sort() is not "stable"
Date: Mon, 15 Apr 2019 18:01:00 -0000
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Bug ID: 90105
Summary: std::forward_list::sort() is not "stable"
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Created attachment 46175
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46175&action=edit
Small example to reproduce the issue
From: https://en.cppreference.com/w/cpp/container/forward_list/sort
"Note: <snip> This function also differs from std::sort in that it does not
require the element type of the forward_list to be swappable, preserves the
values of all iterators, and performs a stable sort."
Output of the attached sample program:
```
List before sort:
a 1
b 2
c 1
d 0
List after sort:
d 0
c 1
a 1
b 2
```
Note that (a, 1) comes before (c, 1), but after the sort the order is reversed.
PS: Example used gcc 7.3.0 under Ubutnu 18.04, but the behavior is pretty
consistent across versions, including 6.3 and 8.0.
>From gcc-bugs-return-640775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 18:54:54 2019
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Subject: [Bug middle-end/90070] Add optimization for optimizing small integer values by fp integral constant
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> Oh that is PR 22326 ....
Indeed it is. And your conclusion there ("we need some pass that does
this properly", instead of the current thing during expand) still holds,
too. (How do you do this btw, remembering all PRs?! :-) )
>From gcc-bugs-return-640776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 19:04:58 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90070] Add optimization for optimizing small integer values by fp integral constant
Date: Mon, 15 Apr 2019 19:04:00 -0000
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--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #6)
> (How do you do this btw, remembering all PRs?! :-) )
No, I had remembered I had filed (seen in most other cases) a similar bug a
long time ago (I don't remember when though) so I did a search as myself as a
reporter and had in the summary, "float" and that is how I found it.
>From gcc-bugs-return-640777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 20:05:00 2019
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Subject: [Bug c++/85890] [7 Regression] cc1plus runs out of memory in recursive Fibonacci computation
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed then.
>From gcc-bugs-return-640778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 20:33:27 2019
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Subject: [Bug d/90059] Solaris mcontext_t, ucontext_t declarations are wrong
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90059
--- Comment #2 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Mon Apr 15 20:32:50 2019
New Revision: 270372
URL: https://gcc.gnu.org/viewcvs?rev=270372&root=gcc&view=rev
Log:
PR d/90059
PR d/90060
PR d/90062
libphobos: Merge upstream druntime 70b9fea6
Backports fixes in the extern(C) bindings for the Solaris/SPARC port.
Initial patch by Rainer Orth.
Reviewed-on: https://github.com/dlang/druntime/pull/2555
Modified:
trunk/libphobos/libdruntime/MERGE
trunk/libphobos/libdruntime/core/sys/posix/ucontext.d
trunk/libphobos/libdruntime/core/sys/solaris/link.d
trunk/libphobos/libdruntime/core/thread.d
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Subject: [Bug d/90060] libphobos.druntime_shared/core/thread.d FAILs on Solaris/SPARC
Date: Mon, 15 Apr 2019 20:33:00 -0000
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--- Comment #2 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Mon Apr 15 20:32:50 2019
New Revision: 270372
URL: https://gcc.gnu.org/viewcvs?rev=270372&root=gcc&view=rev
Log:
PR d/90059
PR d/90060
PR d/90062
libphobos: Merge upstream druntime 70b9fea6
Backports fixes in the extern(C) bindings for the Solaris/SPARC port.
Initial patch by Rainer Orth.
Reviewed-on: https://github.com/dlang/druntime/pull/2555
Modified:
trunk/libphobos/libdruntime/MERGE
trunk/libphobos/libdruntime/core/sys/posix/ucontext.d
trunk/libphobos/libdruntime/core/sys/solaris/link.d
trunk/libphobos/libdruntime/core/thread.d
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Subject: [Bug d/90062] SPARC stack alignment is wrong
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90062
--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Mon Apr 15 20:32:50 2019
New Revision: 270372
URL: https://gcc.gnu.org/viewcvs?rev=270372&root=gcc&view=rev
Log:
PR d/90059
PR d/90060
PR d/90062
libphobos: Merge upstream druntime 70b9fea6
Backports fixes in the extern(C) bindings for the Solaris/SPARC port.
Initial patch by Rainer Orth.
Reviewed-on: https://github.com/dlang/druntime/pull/2555
Modified:
trunk/libphobos/libdruntime/MERGE
trunk/libphobos/libdruntime/core/sys/posix/ucontext.d
trunk/libphobos/libdruntime/core/sys/solaris/link.d
trunk/libphobos/libdruntime/core/thread.d
>From gcc-bugs-return-640781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 20:36:58 2019
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Subject: [Bug d/90060] libphobos.druntime_shared/core/thread.d FAILs on Solaris/SPARC
Date: Mon, 15 Apr 2019 20:36:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Should be done in r270372, reopen if it's still a problem.
>From gcc-bugs-return-640782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 20:37:34 2019
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Subject: [Bug d/90062] SPARC stack alignment is wrong
Date: Mon, 15 Apr 2019 20:37:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Patch committed to r270372.
>From gcc-bugs-return-640783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 20:39:09 2019
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/90059] Solaris mcontext_t, ucontext_t declarations are wrong
Date: Mon, 15 Apr 2019 20:39:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Definitions added in r270372. I made a couple of tweaks to the original patch
so that only mcontext_t and ucontext_t are public in the module, other than
that, applied as-is.
>From gcc-bugs-return-640784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 15 21:43:39 2019
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From: "John.Ericson at Obsidian dot Systems" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/87758] --print-file-name= ignores -L
Date: Mon, 15 Apr 2019 21:43:00 -0000
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--- Comment #3 from John Ericson <John.Ericson at Obsidian dot Systems> ---
Hmm, the GHC issue I meant to link I think is
https://gitlab.haskell.org/ghc/ghc/issues/11042 . From the looks of it, I might
have pasted the wrong URL anyways, but in any event GHC switched from Trac to
(its own) GitLab, so the link would have eventually rotted regardless.
>From gcc-bugs-return-640785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 00:22:04 2019
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From: "fredericopissarra at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90106] New: builtin sqrt() ignoring libm's sqrt call result
Date: Tue, 16 Apr 2019 00:22:00 -0000
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Bug ID: 90106
Summary: builtin sqrt() ignoring libm's sqrt call result
Product: gcc
Version: unknown
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Priority: P3
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GCC 7.3 and 8.2 (from Ubuntu 18.04 and MinGW-w64) seems to generate wrong code
for sqrtf() -- and sqrt() -- for multiple platforms (tested under x86-64 and
ARM Arch64, gcc 7.3, and Arch32 with gcc 6.3). Try to compile this simple
function:
/* test.c */
#include <math.h>
float f( float x ) { return sqrtf( x ); }
And I've got, for x86-64 using SSE:
# Compiled with gcc -O2 -S test.c
f:
pxor %xmm2,%xmm2
sqrtss %xmm0,%xmm1
ucomiss %xmm0,%xmm2
ja .L8
movaps %xmm1,%xmm0
ret
.L8:
subq $24,%rsp
movss %xmm1, 12(%rsp) # save xmm1 from sqrtss
call sqrtf@PLT
movss 12(%rsp),%xmm1 # restore xmm1.
addq $24,%rsp
movaps %xmm1,%xmm0 # use xmm1 anyway?!
ret
Notice, when 0 > x sqrt@PLT is called, but the result is ignored.
A similar code is created by GCC for ARM.
As expected, -ffast-math, creates:
f:
sqrtss %xmm0,%xmm0
ret
Which is correct.
My environment:
$ gcc --version
gcc (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0
$ gcc-8 --version
gcc-8 (Ubuntu 8.2.0-1ubuntu2~18.04) 8.2.0
$ Â arm-none-eabi-gcc --version
arm-none-eabi-gcc (15:6.3.1+svn253039-1build1) 6.3.1 20170620
$ Â aarch64-linux-gnu-gcc --version
aarch64-linux-gnu-gcc (Ubuntu/Linaro 7.3.0-27ubuntu1~18.04) 7.3.0
 $  uname -srvp
Linux 4.15.0-47-generic #50-Ubuntu SMP Wed Mar 13 10:44:52 UTC 2019 x86_64
$ Â lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90106
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It is <0 when sqrt is called and it is due setting errno. Not a bug.
>From gcc-bugs-return-640787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 00:30:32 2019
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From: "fredericopissarra at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90106] builtin sqrt() ignoring libm's sqrt call result
Date: Tue, 16 Apr 2019 00:30:00 -0000
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--- Comment #2 from Frederico Lamberti Pissarra <fredericopissarra at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> It is <0 when sqrt is called and it is due setting errno. Not a bug.
Hummmm... interesting. But why the inefficient code?
>From gcc-bugs-return-640788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 00:46:06 2019
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From: "richard-gccbugzilla at metafoo dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90107] New: rejects-valid on global-namespace-qualified variable declared after class definition
Date: Tue, 16 Apr 2019 00:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90107
Bug ID: 90107
Summary: rejects-valid on global-namespace-qualified variable
declared after class definition
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: c++
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GCC rejects these valid examples, producing a bogus "expected ';' after struct
definition" diagnostic:
struct A;
namespace N { extern A a; }
struct A {} ::N::a;
struct A;
struct B { static A a; };
struct A {} ::B::a;
(I just fixed a rejects-valid on the same cases in Clang.)
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Subject: [Bug c++/90108] New: ICE: Segmentation fault (in c_tree_chain_next)
Date: Tue, 16 Apr 2019 02:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90108
Bug ID: 90108
Summary: ICE: Segmentation fault (in c_tree_chain_next)
Product: gcc
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Keywords: GC
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g++-9.0.0-alpha20190414 snapshot (r270355), 8.3, 7.4, 6.3, 5.5 all ICE when
compiling gcc/testsuite/c-c++-common/pr89933.c w/ --param ggc-min-heapsize=0:
% g++-9.0.0-alpha20190414 --param ggc-min-heapsize=0 -c
gcc/testsuite/c-c++-common/pr89933.c
gcc/testsuite/c-c++-common/pr89933.c:5:71: internal compiler error:
Segmentation fault
5 | typedef unsigned int a __attribute__ ((__aligned__(8), __may_alias__));
| ^
0xf780df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/toplev.c:326
0xa3c507 c_tree_chain_next
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/c-family/c-common.h:1197
0xa3c507 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:110
0xa3d7a2 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:441
0xa3d6e9 gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:420
0xa3d47a gt_ggc_mx_lang_tree_node(void*)
./gt-cp-tree.h:336
0xcbaf04 ggc_mark_root_tab
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/ggc-common.c:77
0xcbb10c ggc_mark_roots()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/ggc-common.c:94
0xae542f ggc_collect()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/ggc-page.c:2201
0x91e775 c_parse_final_cleanups()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/decl2.c:4819
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Subject: [Bug ipa/89693] [9 Regression] ICE: verify_cgraph_node failed (error: edge points to wrong declaration)
Date: Tue, 16 Apr 2019 02:05:00 -0000
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--- Comment #9 from Arseny Solokha <asolokha at gmx dot com> ---
Can this PR be closed now?
>From gcc-bugs-return-640791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 02:56:42 2019
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
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--- Comment #4 from bin cheng <amker at gcc dot gnu.org> ---
In get_scaled_computation_cost_at, we have very big ratio between
bb_count/loop_count:
(gdb) p data->current_loop->latch->count
$50 = {static n_bits = 61, static max_count = 2305843009213693950, static
uninitialized_count = 2305843009213693951, m_val = 158483, m_quality =
profile_guessed_local}
(gdb) p gimple_bb(at)->count
$51 = {static n_bits = 61, static max_count = 2305843009213693950, static
uninitialized_count = 2305843009213693951, m_val = 1569139790, m_quality =
profile_guessed_local}
(gdb) p 1569139790 / 158483
$52 = 9900
(gdb) p cost
$53 = {cost = 20, complexity = 2, scratch = 1}
(gdb) p 19 * 9900
$54 = 188100
as a result, sum_cost soon reaches to overflow of infinite_cost. Shall we cap
the ratio so that it doesn't grow too quick? Of course, some benchmark data is
needed for this heuristic tuning.
Another problem is the generated binary has segment fault issue even compiled
O0:
$ ./g++ -O0 pr90078.cc -o a.out -ftemplate-depth=1000000 -ftime-report -g
-std=c++14
$ gdb --args ./a.out
Dump of assembler code for function main():
0x0000000000400572 <+0>: push %rbp
0x0000000000400573 <+1>: mov %rsp,%rbp
0x0000000000400576 <+4>: sub $0x2625a020,%rsp
0x000000000040057d <+11>: lea -0x2625a020(%rbp),%rax
0x0000000000400584 <+18>: mov %rax,%rdi
=> 0x0000000000400587 <+21>: callq 0x4006c0 <Tensor4<float, 100, 100, 100,
100>::Tensor4()>
0x000000000040058c <+26>: lea -0x4c4b410(%rbp),%rax
0x0000000000400593 <+33>: lea -0xe4e1c10(%rbp),%rdx
The segment fault happens at the callq instruction.
>From gcc-bugs-return-640792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 04:22:20 2019
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Subject: [Bug other/88790] No warning for misleading indentation
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #1)
> (I couldn't add that cc:, Daniel doesn't have a bugzilla account yet).
What about now?
>From gcc-bugs-return-640793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 06:29:26 2019
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Subject: [Bug rtl-optimization/87703] UBSAN: poly-int.h:1941:12: runtime error: negation of -9223372036854775808 cannot be represented in type 'long int'; cast to an unsigned type to negate this value to itself
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Vittorio Zecca <zeccav at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zeccav at gmail dot com
--- Comment #1 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in trunk 270309 but requires optimization, at least -O1
to display the undefined behaviour.
First time found while building gcc compiling dwarf2out.c
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90078
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to bin cheng from comment #4)
> In get_scaled_computation_cost_at, we have very big ratio between
> bb_count/loop_count:
>
> (gdb) p data->current_loop->latch->count
> $50 = {static n_bits = 61, static max_count = 2305843009213693950, static
> uninitialized_count = 2305843009213693951, m_val = 158483, m_quality =
> profile_guessed_local}
> (gdb) p gimple_bb(at)->count
> $51 = {static n_bits = 61, static max_count = 2305843009213693950, static
> uninitialized_count = 2305843009213693951, m_val = 1569139790, m_quality =
> profile_guessed_local}
> (gdb) p 1569139790 / 158483
> $52 = 9900
> (gdb) p cost
> $53 = {cost = 20, complexity = 2, scratch = 1}
> (gdb) p 19 * 9900
> $54 = 188100
>
> as a result, sum_cost soon reaches to overflow of infinite_cost. Shall we
> cap the ratio so that it doesn't grow too quick? Of course, some benchmark
> data is needed for this heuristic tuning.
I would implement the capping in comp_cost struct where each individual
operator
can cap to infinite. What do you think Bin?
>
>
> Another problem is the generated binary has segment fault issue even
> compiled O0:
>
> $ ./g++ -O0 pr90078.cc -o a.out -ftemplate-depth=1000000 -ftime-report -g
> -std=c++14
> $ gdb --args ./a.out
>
> Dump of assembler code for function main():
> 0x0000000000400572 <+0>: push %rbp
> 0x0000000000400573 <+1>: mov %rsp,%rbp
> 0x0000000000400576 <+4>: sub $0x2625a020,%rsp
> 0x000000000040057d <+11>: lea -0x2625a020(%rbp),%rax
> 0x0000000000400584 <+18>: mov %rax,%rdi
> => 0x0000000000400587 <+21>: callq 0x4006c0 <Tensor4<float, 100, 100,
> 100, 100>::Tensor4()>
> 0x000000000040058c <+26>: lea -0x4c4b410(%rbp),%rax
> 0x0000000000400593 <+33>: lea -0xe4e1c10(%rbp),%rdx
>
> The segment fault happens at the callq instruction.
Yes, same happens also for clang. It's a stack overflow:
$ g++ pr90078.cpp -ftemplate-depth=1111111 -fsanitize=address && ./a.out
AddressSanitizer:DEADLYSIGNAL
=================================================================
==5750==ERROR: AddressSanitizer: stack-overflow on address 0x7fffd9da3af0 (pc
0x0000004011cb bp 0x7fffffffdc60 sp 0x7fffd9da3af0 T0)
#0 0x4011ca in main (/home/marxin/Programming/testcases/a.out+0x4011ca)
#1 0x7ffff6d32b7a in __libc_start_main ../csu/libc-start.c:308
#2 0x401109 in _start (/home/marxin/Programming/testcases/a.out+0x401109)
SUMMARY: AddressSanitizer: stack-overflow
(/home/marxin/Programming/testcases/a.out+0x4011ca) in main
==5750==ABORTING
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Subject: [Bug c/90106] builtin sqrt() ignoring libm's sqrt call result
Date: Tue, 16 Apr 2019 06:44:00 -0000
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Frederico Lamberti Pissarra from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > It is <0 when sqrt is called and it is due setting errno. Not a bug.
>
> Hummmm... interesting. But why the inefficient code?
What do you mean by inefficient? What would you suggest instead? We generate a
fast sqrtss and only in the rare case where there is an error we call the libc
sqrt function to let it report errors the way it wants. -fno-math-errno is the
way to say we don't care about this kind of error reporting.
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 16 Apr 2019 06:57:00 -0000
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46110|0 |1
is obsolete| |
--- Comment #68 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 46176
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46176&action=edit
revised fixincludes patch.
So I have an answer about the language implications.
Any C++ program containing _Atomic is using a reserved identifier, and so is
"ill-formed no diagnostic required", per [lex.name]/3
Therefore, it's standards-conforming for a [C++] implementation to make such
identifiers keywords (as GCC does for __attribute__, for example)
Apparently, this is intentional extension and is only one of a longer list of
such keywords that clang++ accepts.
====
Since, according to the discussion above, this is not a bug in the compiler but
rather in using a non-portable extension, perhaps we should not expect any
change to the headers.
====
The patch attached include the generated files, and I'd be grateful if folks
would test it (right now I have limited access to Darwin test boxen, but it
seems to DTRT for me) - I will post to @patches, but leave commit until it's
confirmed that it's working.
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Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
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--- Comment #6 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to Guy Perfect from comment #5)
> (In reply to Harald van Dijk from comment #4)
> That was my line of thinking: supplying a cast in the macro.
Keep in mind that inside #if expressions, there cannot be and will not be any
cast. That's the reason I included the + there.
> Even in the
> case of negative values being cast to unsigned types, the language spec
> provides a rule for that, so the behavior is defined independent of the
> implementation:
As Andreas Schwab pointed out, the behaviour of UINT8_C in that case is
undefined, even if the behaviour of a cast would be defined. It simply does not
matter what happens in that case.
> I think the ticket was marked "resolved invalid" prematurely, as there's
> clearly a meaningful problem and a meaningful solution.
I do think it's rightly closed, but for a reason not yet mentioned: these
macros are not defined by GCC's <stdint.h>. If this required compiler magic to
implement, it would be primarily a GCC bug, but the fact that no compiler magic
is needed means this is purely a glibc bug, so should be filed there.
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Subject: [Bug gcov-profile/90104] [GCOV] Wrong coverage for calling a function with variable arguments when they are embedded in a inline function
Date: Tue, 16 Apr 2019 07:14:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-16
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, simplified test-case:
#include <stdarg.h>
long x = 0;
inline void __attribute__((always_inline))
bar (va_list ap)
{
x = va_arg (ap, double);
}
void foo (int i, ...)
{
va_list ap;
va_start (ap, i);
bar (ap);
va_end (ap);
}
int main ()
{
foo (18.0);
return 0;
}
At coverage pass, we have following GIMPLE:
$2 = void
(gdb) p debug_function(cfun->decl, 0)
foo (int i)
{
struct * ap;
struct ap[1];
double _6;
long int _7;
<bb 2> :
__builtin_va_start (&ap, 0);
ap_5 = ≈
_6 = .VA_ARG (ap_5, 0B, 0B);
<bb 3> :
_7 = (long int) _6;
x = _7;
<bb 4> :
__builtin_va_end (&ap);
ap ={v} {CLOBBER};
return;
}
$ gcov-dump -l pr90104.gcno
...
pr90104.gcno: 01000000: 14:FUNCTION ident=1636255671,
lineno_checksum=0xf71f0366, cfg_checksum=0x7cb34af9, `foo' pr90104.c:11:6-17:1
pr90104.gcno: 01410000: 1:BLOCKS 5 blocks
pr90104.gcno: 01430000: 3:ARCS 1 arcs
pr90104.gcno: block 0: 2:0004(fall)
pr90104.gcno: 01430000: 5:ARCS 2 arcs
pr90104.gcno: block 2: 3:0004(fall) 1:0003(tree,fake)
pr90104.gcno: 01430000: 3:ARCS 1 arcs
pr90104.gcno: block 3: 4:0005(tree,fall)
pr90104.gcno: 01430000: 3:ARCS 1 arcs
pr90104.gcno: block 4: 1:0001(tree)
pr90104.gcno: 01450000: 11:LINES
pr90104.gcno: block 2:`pr90104.c':11, 14, 8
pr90104.gcno: 01450000: 10:LINES
pr90104.gcno: block 3:`pr90104.c':8, 9
pr90104.gcno: 01450000: 10:LINES
pr90104.gcno: block 4:`pr90104.c':16, 17
Line 8 is present in bb_2 and bb_3, thus it's incremented twice. It's an
artifact of early inlining.
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Subject: [Bug c++/90108] ICE: Segmentation fault (in c_tree_chain_next)
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-16
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-640800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 07:28:33 2019
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Subject: [Bug rtl-optimization/90094] better handling of x == LONG_MIN on x86-64
Date: Tue, 16 Apr 2019 07:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-16
Component|target |rtl-optimization
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I guess this also applies to conditional branches. It might require to copy
a to a scratch register in case it's value is live over the comparison
(but then it saves a reg for the constant).
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Subject: [Bug middle-end/90095] [8/9 Regression] wrong code with -Os -fno-tree-bit-ccp
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P1 |P2
Target Milestone|9.0 |8.4
Summary|[9 Regression] wrong code |[8/9 Regression] wrong code
|with -Os -fno-tree-bit-ccp |with -Os -fno-tree-bit-ccp
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
rev is on the branch.
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Subject: [Bug middle-end/90095] [9 Regression] wrong code with -Os -fno-tree-bit-ccp
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Blocks| |85414
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85414
[Bug 85414] [8 Regression] ICE: in ix86_expand_prologue, at
config/i386/i386.c:13810 with -Og -fgcse
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Subject: [Bug middle-end/90095] [9 Regression] wrong code with -Os -fno-tree-bit-ccp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P2 |P1
Summary|[8/9 Regression] wrong code |[9 Regression] wrong code
|with -Os -fno-tree-bit-ccp |with -Os -fno-tree-bit-ccp
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> rev is on the branch.
No (but I made similar mistake). The PR had two revisions, only the second
one, applied to trunk only (19 revisions after branching) and that is the one
that broke this.
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
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Vittorio Zecca <zeccav at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |zeccav at gmail dot com
--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in trunk 270309.
Optimization at least -O1 needed to reproduce the bug.
/home/vitti/local/gcc-270309-undefined/bin/gcc -S gccerr70.c -O1
../../gcc/gcc/poly-int.h:845:5: runtime error: signed integer overflow:
9223372036854775804 + 4 cannot be represented in type 'long int'
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Subject: [Bug d/90059] Solaris mcontext_t, ucontext_t declarations are wrong
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--- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> Definitions added in r270372. I made a couple of tweaks to the original patch
> so that only mcontext_t and ucontext_t are public in the module, other than
> that, applied as-is.
That should be fine. I doubt very much that much (if any) user code
uses those types directly.
>From gcc-bugs-return-640806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 07:52:45 2019
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Subject: [Bug tree-optimization/87042] UBSAN: poly-int.h:1095:5: runtime error: signed integer overflow: 9223372036854775807 * 8 cannot be represented in type 'long int'
Date: Tue, 16 Apr 2019 07:52:00 -0000
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----------------------------------------------------------------------------
CC| |zeccav at gmail dot com
--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in trunk 270309.
Requires optimization to reproduce.
/home/vitti/local/gcc-270309-undefined/bin/gcc -S gccerr72.c
[vitti cc]$/home/vitti/local/gcc-270309-undefined/bin/gcc -S gccerr72.c -O
../../gcc/gcc/poly-int.h:1095:5: runtime error: signed integer overflow:
9223372036854775807 * 8 cannot be represented in type 'long int'
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Subject: [Bug tree-optimization/56049] [7/8/9 Regression] Simplification to constants not done
Date: Tue, 16 Apr 2019 07:56:00 -0000
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--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 16 07:55:41 2019
New Revision: 270378
URL: https://gcc.gnu.org/viewcvs?rev=270378&root=gcc&view=rev
Log:
2019-04-16 Richard Biener <rguenther@suse.de>
PR tree-optimization/56049
* tree-ssa-loop-im.c (mem_ref_hasher::equal): Elide alias-set
equality check if alias-set zero will prevail.
* gfortran.dg/pr56049.f90: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/pr56049.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-im.c
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Subject: [Bug d/90059] Solaris mcontext_t, ucontext_t declarations are wrong
Date: Tue, 16 Apr 2019 07:57:00 -0000
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--- Comment #5 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
> Uni-Bielefeld.DE> ---
>> --- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
>> Definitions added in r270372. I made a couple of tweaks to the original patch
>> so that only mcontext_t and ucontext_t are public in the module, other than
>> that, applied as-is.
>
> That should be fine. I doubt very much that much (if any) user code
> uses those types directly.
Btw., I've bootstrapped both sparc-sun-solaris2.11 and
i386-pc-solaris2.11 (Solaris 11.5 both) last night with trunk and there
were no regressions.
Thanks a lot.
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Subject: [Bug tree-optimization/56049] [7/8 Regression] Simplification to constants not done
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
Summary|[7/8/9 Regression] |[7/8 Regression]
|Simplification to constants |Simplification to constants
|not done |not done
Known to fail| |7.4.0, 8.3.0
--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
Date: Tue, 16 Apr 2019 08:00:00 -0000
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--- Comment #6 from bin cheng <amker at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #5)
> (In reply to bin cheng from comment #4)
> > In get_scaled_computation_cost_at, we have very big ratio between
> > bb_count/loop_count:
> >
> > (gdb) p data->current_loop->latch->count
> > $50 = {static n_bits = 61, static max_count = 2305843009213693950, static
> > uninitialized_count = 2305843009213693951, m_val = 158483, m_quality =
> > profile_guessed_local}
> > (gdb) p gimple_bb(at)->count
> > $51 = {static n_bits = 61, static max_count = 2305843009213693950, static
> > uninitialized_count = 2305843009213693951, m_val = 1569139790, m_quality =
> > profile_guessed_local}
> > (gdb) p 1569139790 / 158483
> > $52 = 9900
> > (gdb) p cost
> > $53 = {cost = 20, complexity = 2, scratch = 1}
> > (gdb) p 19 * 9900
> > $54 = 188100
> >
> > as a result, sum_cost soon reaches to overflow of infinite_cost. Shall we
> > cap the ratio so that it doesn't grow too quick? Of course, some benchmark
> > data is needed for this heuristic tuning.
>
> I would implement the capping in comp_cost struct where each individual
> operator
> can cap to infinite. What do you think Bin?
Implementing the capping in comp_cost::operators to infinite_cost is less
invasive. OTOH, capping bb_freq/loop_freq has its own advantages, because:
Once cost reaches to infinite, it becomes meaningless in comparison as well as
candidate choosing; capping bb_freq/loop_freq can still express hotness of
code to some extend.
Let's fix the issue by capping comp_cost::operators first for this stage 4 and
revisit the idea capping bb_freq/loop_freq with more benchmark data in next
Stage 1. How about that?
Thanks.
>
> >
> >
> > Another problem is the generated binary has segment fault issue even
> > compiled O0:
> >
> > $ ./g++ -O0 pr90078.cc -o a.out -ftemplate-depth=1000000 -ftime-report -g
> > -std=c++14
> > $ gdb --args ./a.out
> >
> > Dump of assembler code for function main():
> > 0x0000000000400572 <+0>: push %rbp
> > 0x0000000000400573 <+1>: mov %rsp,%rbp
> > 0x0000000000400576 <+4>: sub $0x2625a020,%rsp
> > 0x000000000040057d <+11>: lea -0x2625a020(%rbp),%rax
> > 0x0000000000400584 <+18>: mov %rax,%rdi
> > => 0x0000000000400587 <+21>: callq 0x4006c0 <Tensor4<float, 100, 100,
> > 100, 100>::Tensor4()>
> > 0x000000000040058c <+26>: lea -0x4c4b410(%rbp),%rax
> > 0x0000000000400593 <+33>: lea -0xe4e1c10(%rbp),%rdx
> >
> > The segment fault happens at the callq instruction.
>
> Yes, same happens also for clang. It's a stack overflow:
>
> $ g++ pr90078.cpp -ftemplate-depth=1111111 -fsanitize=address && ./a.out
> AddressSanitizer:DEADLYSIGNAL
> =================================================================
> ==5750==ERROR: AddressSanitizer: stack-overflow on address 0x7fffd9da3af0
> (pc 0x0000004011cb bp 0x7fffffffdc60 sp 0x7fffd9da3af0 T0)
> #0 0x4011ca in main (/home/marxin/Programming/testcases/a.out+0x4011ca)
> #1 0x7ffff6d32b7a in __libc_start_main ../csu/libc-start.c:308
> #2 0x401109 in _start (/home/marxin/Programming/testcases/a.out+0x401109)
>
> SUMMARY: AddressSanitizer: stack-overflow
> (/home/marxin/Programming/testcases/a.out+0x4011ca) in main
> ==5750==ABORTING
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Subject: [Bug c++/90108] ICE: Segmentation fault (in c_tree_chain_next)
Date: Tue, 16 Apr 2019 08:04:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we have a non-GCed INTEGER_TYPE that has a GCed TYPE_NAME. IIRC changes
there recently, PR89933.
We free that TYPE_NAME here (as expected...):
#1 0x00000000009584ee in duplicate_decls (
newdecl=<type_decl 0x7ffff6988720 a>,
olddecl=<type_decl 0x7ffff6988688 a>, newdecl_is_friend=false)
at /space/rguenther/src/svn/trunk2/gcc/cp/decl.c:2793
2793 ggc_free (newdecl);
Jakub - you fiddled here, can you look at this one, too?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #69 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Iain Sandoe from comment #68)
> Created attachment 46176 [details]
> revised fixincludes patch.
>
> The patch attached include the generated files, and I'd be grateful if folks
> would test it (right now I have limited access to Darwin test boxen, but it
> seems to DTRT for me) - I will post to @patches, but leave commit until it's
> confirmed that it's working.
I will test this fix tonight when I have access to enough electricity again.
It looks like this really affects things, as my try to compile LLVM failed:
$ make
[ 0%] Built target LLVMDemangle
[ 0%] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Host.cpp.o
In file included from /usr/include/sys/sysctl.h:83,
from
/Users/reuter/local/packages/llvm-project/llvm/lib/Support/Host.cpp:1224:
/usr/include/sys/ucred.h:94:2: error: '_Atomic' does not name a type
94 | _Atomic u_long cr_ref; /* reference count */
| ^~~~~~~
make[2]: *** [lib/Support/CMakeFiles/LLVMSupport.dir/Host.cpp.o] Error 1
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Subject: [Bug c++/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to bin cheng from comment #6)
> (In reply to Martin Liška from comment #5)
> > (In reply to bin cheng from comment #4)
> > > In get_scaled_computation_cost_at, we have very big ratio between
> > > bb_count/loop_count:
> > >
> > > (gdb) p data->current_loop->latch->count
> > > $50 = {static n_bits = 61, static max_count = 2305843009213693950, static
> > > uninitialized_count = 2305843009213693951, m_val = 158483, m_quality =
> > > profile_guessed_local}
> > > (gdb) p gimple_bb(at)->count
> > > $51 = {static n_bits = 61, static max_count = 2305843009213693950, static
> > > uninitialized_count = 2305843009213693951, m_val = 1569139790, m_quality =
> > > profile_guessed_local}
> > > (gdb) p 1569139790 / 158483
> > > $52 = 9900
> > > (gdb) p cost
> > > $53 = {cost = 20, complexity = 2, scratch = 1}
> > > (gdb) p 19 * 9900
> > > $54 = 188100
> > >
> > > as a result, sum_cost soon reaches to overflow of infinite_cost. Shall we
> > > cap the ratio so that it doesn't grow too quick? Of course, some benchmark
> > > data is needed for this heuristic tuning.
> >
> > I would implement the capping in comp_cost struct where each individual
> > operator
> > can cap to infinite. What do you think Bin?
> Implementing the capping in comp_cost::operators to infinite_cost is less
> invasive. OTOH, capping bb_freq/loop_freq has its own advantages, because:
> Once cost reaches to infinite, it becomes meaningless in comparison as well
> as candidate choosing; capping bb_freq/loop_freq can still express hotness
> of code to some extend.
> Let's fix the issue by capping comp_cost::operators first for this stage 4
> and revisit the idea capping bb_freq/loop_freq with more benchmark data in
> next Stage 1. How about that?
>
> Thanks.
Sounds good. Can you please work on that Bin?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90090] [7/8/9 Regression] ICE in mark_reachable_handlers, at tree-eh.c:3938 since r219202
Date: Tue, 16 Apr 2019 08:25:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 16 08:24:47 2019
New Revision: 270379
URL: https://gcc.gnu.org/viewcvs?rev=270379&root=gcc&view=rev
Log:
PR tree-optimization/90090
* tree-ssa-math-opts.c (is_division_by): Ignore divisions that can
throw internally.
(is_division_by_square): Likewise. Formatting fix.
* g++.dg/opt/pr90090.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr90090.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-math-opts.c
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Subject: [Bug rtl-optimization/90082] [9 Regression] ICE in delete_unmarked_insns, at dce.c:653
Date: Tue, 16 Apr 2019 08:27:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 16 08:26:26 2019
New Revision: 270380
URL: https://gcc.gnu.org/viewcvs?rev=270380&root=gcc&view=rev
Log:
PR rtl-optimization/90082
* dce.c (can_delete_call): New function.
(deletable_insn_p, mark_insn): Use it.
* gcc.dg/pr90082.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr90082.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dce.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #70 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #69)
> (In reply to Iain Sandoe from comment #68)
> > Created attachment 46176 [details]
> > revised fixincludes patch.
> >
> > The patch attached include the generated files, and I'd be grateful if folks
> > would test it (right now I have limited access to Darwin test boxen, but it
> > seems to DTRT for me) - I will post to @patches, but leave commit until it's
> > confirmed that it's working.
>
> I will test this fix tonight when I have access to enough electricity again.
>
> It looks like this really affects things,
I am not clear what you're reporting here - the patch will not "do anything"
until you build GCC with it applied, and then install the built compiler.
> as my try to compile LLVM failed:
Does this mean, "when building LLVM on OSX 10.14.2 using GCC as the bootstrap
compiler"?
(I'm not sure what's wrong here - if the compiler bootstrap succeeds, then the
compiler should be able to process the headers - if the code is C11, then
_Atomic should be accepted, if it's C++ then _Atomic should be mapped to
volatile).
>From gcc-bugs-return-640817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 08:37:31 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 16 Apr 2019 08:37:00 -0000
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--- Comment #71 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #70)
> (In reply to Jürgen Reuter from comment #69)
> > (In reply to Iain Sandoe from comment #68)
> Does this mean, "when building LLVM on OSX 10.14.2 using GCC as the
> bootstrap compiler"?
>
> (I'm not sure what's wrong here - if the compiler bootstrap succeeds, then
> the compiler should be able to process the headers - if the code is C11,
> then _Atomic should be accepted, if it's C++ then _Atomic should be mapped
> to volatile).
I guess that means for some other piece of (C++) code there's some use of
_Atomic that's being messed up by including <sys/xxxxx> or some other header
that includes ucred.h.
... will try to repeat ...
>From gcc-bugs-return-640818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 08:41:33 2019
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Subject: [Bug target/90096] Misleading option hint for AVX intrinsics
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 16 08:40:58 2019
New Revision: 270381
URL: https://gcc.gnu.org/viewcvs?rev=270381&root=gcc&view=rev
Log:
PR target/90096
* config/i386/i386.c (ix86_target_string): Add ADD_ABI_P argument, only
print -m64/-mx32/-m32 if it is true.
(ix86_debug_options, ix86_function_specific_print): Pass true as
ADD_ABI_P to ix86_target_string.
(ix86_expand_builtin): Adjust ix86_target_string caller, pass true as
ADD_ABI_P only if OPTION_MASK_ISA_64BIT is set in bisa and in that case
or into it OPTION_MASK_ISA_ABI_64 or OPTION_MASK_ISA_ABI_X32.
* gcc.target/i386/pr90096.c: New test.
* gcc.target/i386/pr69255-1.c: Adjust expected diagnostics.
* gcc.target/i386/pr69255-2.c: Likewise.
* gcc.target/i386/pr69255-3.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr90096.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr69255-1.c
trunk/gcc/testsuite/gcc.target/i386/pr69255-2.c
trunk/gcc/testsuite/gcc.target/i386/pr69255-3.c
>From gcc-bugs-return-640819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 08:50:30 2019
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Subject: [Bug debug/90109] New: gstabs flag generates wrong entry for long on x86_64
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Bug ID: 90109
Summary: gstabs flag generates wrong entry for long on x86_64
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Make a bug.c file with content:
typedef struct {
int a;
short unsigned int b;
char c[2];
long int d;
long long int e;
} mytype_t;
compile it with:
gcc -c -gstabs bug.c
obtain a bug.o object file (this is the output of command: file bug.o)
bug.o: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV), not stripped
use objdump to get debug infos from bug.o:
objdump --debugging bug.o
This is the output:
bug.o: file format elf64-x86-64
bug.c:
typedef int32 int;
typedef int8 char;
typedef uint32 long int;
typedef uint32 unsigned int;
typedef uint32 long unsigned int;
typedef uint32 __int128;
typedef uint32 __int128 unsigned;
typedef uint32 long long int;
typedef uint64 long long unsigned int;
typedef int16 short int;
typedef uint16 short unsigned int;
typedef int8 signed char;
typedef uint8 unsigned char;
typedef float float;
typedef double double;
typedef float128 long double;
typedef float _Decimal32;
typedef double _Decimal64;
typedef float128 _Decimal128;
typedef void void;
typedef struct %anon1 { /* size 24 */
int a; /* bitsize 32, bitpos 0 */
short unsigned int b; /* bitsize 16, bitpos 32 */
char c[2]:uint32; /* bitsize 16, bitpos 48 */
long int d; /* bitsize 64, bitpos 64 */
long long int e; /* bitsize 64, bitpos 128 */
} mytype_t;
'long int d' and 'long long int e' inside the struct have correct bitsize (64),
but typedef for 'long int', 'long unsigned int' and 'long long int' are defined
as uint32 and not uint64
>From gcc-bugs-return-640820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 09:19:52 2019
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Subject: [Bug bootstrap/89864] [9 regression] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 16 Apr 2019 09:19:00 -0000
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--- Comment #72 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Iain Sandoe from comment #71)
> (In reply to Iain Sandoe from comment #70)
> > (In reply to Jürgen Reuter from comment #69)
> > > (In reply to Iain Sandoe from comment #68)
>
> > Does this mean, "when building LLVM on OSX 10.14.2 using GCC as the
> > bootstrap compiler"?
> >
> > (I'm not sure what's wrong here - if the compiler bootstrap succeeds, then
> > the compiler should be able to process the headers - if the code is C11,
> > then _Atomic should be accepted, if it's C++ then _Atomic should be mapped
> > to volatile).
>
> I guess that means for some other piece of (C++) code there's some use of
> _Atomic that's being messed up by including <sys/xxxxx> or some other header
> that includes ucred.h.
>
> ... will try to repeat ...
This issue was with the fixincludes from comment #45, not yet with the new one.
I have to compile/bootstrap with the new fix tonight.
>From gcc-bugs-return-640822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 09:32:23 2019
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Subject: [Bug rtl-optimization/90082] [9 Regression] ICE in delete_unmarked_insns, at dce.c:653
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/90090] [7/8 Regression] ICE in mark_reachable_handlers, at tree-eh.c:3938 since r219202
Date: Tue, 16 Apr 2019 09:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 Regression] ICE in |[7/8 Regression] ICE in
|mark_reachable_handlers, at |mark_reachable_handlers, at
|tree-eh.c:3938 since |tree-eh.c:3938 since
|r219202 |r219202
Known to fail|9.0 |
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug target/90088] 3 ops LEA should be avoided on Intel CPUs
Date: Tue, 16 Apr 2019 09:41:00 -0000
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--- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Richard Biener from comment #3)
> We have two related tunables, X86_TUNE_OPT_AGU and
> X86_TUNE_AVOID_LEA_FOR_ADDR.
>
> Probably related is that most uarchs have extra cost for complex addressing
> modes for moves (extra uop to generate the addres). But I wasn't aware
> that there's extra costs for the AGU op itself.
Yes, m_SANDYBRIDGE is not in X86_TUNE_OPT_AGU and X86_TUNE_AVOID_LEA_FOR_ADDR.
But when I try
gcc -O2 test.c -S -mtune=bonnell
It fails to avoid LEAL instruction, since m_BONNELL is in both tunables,
I believe there's other places need to be handled such as
/* Return true if usage of lea INSN has performance advantage
over a sequence of instructions. Instructions sequence has
SPLIT_COST cycles higher latency than lea latency. */
static bool
ix86_lea_outperforms (rtx_insn *insn, unsigned int regno0, unsigned int regno1,
unsigned int regno2, int split_cost, bool has_scale)
{
int dist_define, dist_use;
>From gcc-bugs-return-640824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 09:43:45 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/90110] New: [9 Regression] libgo fails to build against glibc 2.19
Date: Tue, 16 Apr 2019 09:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90110
Bug ID: 90110
Summary: [9 Regression] libgo fails to build against glibc 2.19
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: rguenth at gcc dot gnu.org
CC: cmang at google dot com
Target Milestone: ---
When building GCC 9 against glibc 2.19 I get
[ 6667s] ../../../../libgo/go/strconv/atof.go:13:12: error: invalid export data
for 'Float32frombits': expected integer at 79
[ 6667s] 13 | import "math"
[ 6667s] | ^
[ 6667s] ../../../../libgo/go/math/unsafe.go:18: error: expected pointer
[ 6667s] ../../../../libgo/go/strconv/atof.go:13:12: error: invalid export data
for 'Float64frombits': expected integer at 79
[ 6667s] 13 | import "math"
[ 6667s] | ^
[ 6667s] ../../../../libgo/go/math/unsafe.go:29: error: expected pointer
[ 6667s] ../../../../libgo/go/strconv/atof.go:13:12: error: invalid export data
for 'Float32bits': expected integer at 79
[ 6667s] 13 | import "math"
[ 6667s] | ^
[ 6667s] ../../../../libgo/go/math/unsafe.go:12: error: expected pointer
[ 6667s] ../../../../libgo/go/strconv/atof.go:13:12: error: invalid export data
for 'Float64bits': expected integer at 79
[ 6667s] 13 | import "math"
[ 6667s] | ^
[ 6667s] ../../../../libgo/go/math/unsafe.go:23: error: expected pointer
[ 6667s] Makefile:2838: recipe for target 'strconv.lo' failed
[ 6667s] make[8]: *** [strconv.lo] Error 1
GCC 8 is fine.
>From gcc-bugs-return-640825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 09:44:20 2019
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Target| |x86_64-*-*, i?86-*-*,
| |ppc64le-*-*, aarch64-*-*,
| |s390x-*-*
Priority|P3 |P4
Target Milestone|--- |9.0
>From gcc-bugs-return-640826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 09:46:33 2019
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Subject: [Bug target/90103] ICE building Glibc's e_atan2f.c with -O2 -mcpu=hs38_linux -frounding-math
Date: Tue, 16 Apr 2019 09:46:00 -0000
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--- Comment #1 from Claudiu Zissulescu <claziss at gmail dot com> ---
Probably,this patch needs to be backported:
[ARC] Update fma expansions.
Accept at most a single constant for fma patterns.
gcc/
2018-03-21 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/fpu.md (fmasf4): Force operand to register.
(fnmasf4): Likewise.
gcc/testsuite
2018-03-21 Claudiu Zissulescu <claziss@synopsys.com>
* gcc.target/arc/fma-1.c: New test.
SVN: 261543
>From gcc-bugs-return-640827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:07:37 2019
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Subject: [Bug c++/65799] Allows constexpr conversion from cv void * to other type
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
CC| |msebor at gcc dot gnu.org
Resolution|FIXED |---
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Martin, do you want to take a look at these cases, which your 2238909 change
didn't handle?
char gdummy = {};
constexpr int* test_global = (int*)(void*)&gdummy; // ill-formed
static_assert(test_global);
constexpr bool test_local() {
float dummy = {};
(int*)(void*)&dummy; // ill-formed
return true;
}
static_assert(test_local(), "");
>From gcc-bugs-return-640828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:10:42 2019
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Subject: [Bug c++/90085] c++17 template argument deduction results in missed optimization
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-640829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:11:25 2019
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Subject: [Bug c++/90107] rejects-valid on global-namespace-qualified variable declared after class definition
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-640830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:13:41 2019
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Subject: [Bug c++/88075] [feature-request] allow "concept" instead of "concept bool" with -fconcepts
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Known to work| |9.0
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This was changed by Jason in r269692 so let's ask him.
Don't require 'bool' in a concept definition.
* parser.c (cp_parser_decl_specifier_seq): Support C++20
concept-definition syntax without 'bool'.
>From gcc-bugs-return-640831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:20:36 2019
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Subject: [Bug libstdc++/90050] std::filesystem::path segfault in destructor
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The -lstdc++fs requirement for std::filesystem in GCC 8 is documented in
several places:
https://gcc.gnu.org/onlinedocs/gcc-8.3.0/libstdc++/manual/manual/using.html#manual.intro.using.flags
https://gcc.gnu.org/onlinedocs/gcc-8.3.0/libstdc++/manual/manual/status.html#status.iso.2017
https://gcc.gnu.org/onlinedocs/gcc-8.3.0/libstdc++/manual/manual/using_dynamic_or_shared.html#manual.intro.using.linkage.experimental
I don't know why it crashes with Ubuntu, it should be a linker error. I suspect
Ubuntu is doing something silly like providing libstdc++.so from GCC 9, which
defines std::filesystem::path differently, and so is not compatible with C++17
code compiled using GCC 8.
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Subject: [Bug libstdc++/90050] std::filesystem::path segfault in destructor
Date: Tue, 16 Apr 2019 10:22:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Although if you link with -lstdc++fs then it should work OK, because the
incompatible std::filesystem symbols in libstdc++.so.6.0.26 won't be used.
>From gcc-bugs-return-640832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:22:05 2019
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Subject: [Bug debug/90109] gstabs flag generates wrong entry for long on x86_64
Date: Tue, 16 Apr 2019 10:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wilson at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 8 seems to get 'long int' correct:
typedef int32 int;
typedef int8 char;
typedef int64 long int;
typedef uint32 unsigned int;
typedef uint32 long unsigned int;
typedef uint32 __int128;
typedef uint32 __int128 unsigned;
typedef int64 long long int;
typedef uint64 long long unsigned int;
typedef int16 short int;
typedef uint16 short unsigned int;
typedef int8 signed char;
typedef uint8 unsigned char;
typedef float float;
typedef double double;
typedef float128 long double;
long double is also wrong. GCC does
if (print_int_cst_bounds_in_octal_p (type, low, high))
...
else
/* Output other integer types as subranges of `int'. */
dbxout_range_type (type, low, high);
probably that's the issue. It looks like you need to use -gstabs+ to allow
representing those types at all (stabs with GNU extensions). With -gstabs+
I see
/tmp/t.c:
typedef int32 int;
typedef int8 char;
typedef int64 long int;
typedef uint32 unsigned int;
typedef uint64 long unsigned int;
typedef void __int128;
typedef void __int128 unsigned;
typedef int64 long long int;
typedef uint64 long long unsigned int;
typedef int16 short int;
typedef uint16 short unsigned int;
typedef int8 signed char;
typedef uint8 unsigned char;
typedef float float;
typedef double double;
typedef float128 long double;
(long double still wrong)
So - INVALID? Jim, you are "remotely" listed as MAINTAINER for stabs.
>From gcc-bugs-return-640834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:33:03 2019
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90111] New: Placement of Fortran OpenACC 'routine' directive inside 'specification-part'
Date: Tue, 16 Apr 2019 10:33:00 -0000
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Bug ID: 90111
Summary: Placement of Fortran OpenACC 'routine' directive
inside 'specification-part'
Product: gcc
Version: 9.0
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Keywords: openacc, rejects-valid
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OpenACC 2.7 (same in 2.6), in section 2.15.1. "Routine Directive" states that
"In Fortran, the 'routine' directive without a name may appear within the
specification part of a subroutine or function definition, or within an
interface body for a subroutine or function in an interface block, and applies
to the containing subroutine or function. The 'routine' directive with a name
may appear in the specification part of a subroutine, function or module, and
applies to the named subroutine or function".
It therefore seems wrong to me that the following gets rejected:
subroutine s
!$acc routine seq
implicit none
integer :: i
i = 0
end subroutine s
2 | !$acc routine seq
| 2
3 | implicit none
| 1containi
Error: IMPLICIT NONE statement at (1) cannot follow !$ACC ROUTINE statement
at (2)
Or am I misunderstanding something about 'implicit-stmt'? But at least for the
'routine' directive without a name, which always implicitly applies to the
containing subprogram etc., this placement should not matter at all (thus, the
above be valid).
I have not looked for any other such rejects-valid constructs.
>From gcc-bugs-return-640835-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 10:57:19 2019
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Subject: [Bug fortran/90112] New: internal procedure using module procedure instead of "sibling" internal procedure
Date: Tue, 16 Apr 2019 10:57:00 -0000
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Bug ID: 90112
Summary: internal procedure using module procedure instead of
"sibling" internal procedure
Product: gcc
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In some cases an internal procedure will use a module procedure instead of
another internal procedure (in the same host unit) with the same name. In the
example below, R(x) calls f(x), but it uses the module's f(x) instead of the
one internal to g(x) (as probably intended).
module test_functions
contains
subroutine f(x)
implicit none
real, intent(inout) :: x
x = 2 * x
end subroutine f
subroutine g(x)
implicit none
real, intent(inout) :: x
call R(x)
contains
subroutine R(x)
implicit none
real, intent(inout) :: x
call f(x)
end subroutine R
subroutine f(x)
implicit none
real, intent(inout) :: x
x = 3 * x
end subroutine f
end subroutine g
end module
program scope
use test_functions
real :: x = 3.0, y = 3.0
call f(x)
call g(y)
write(*, *) x, y
end program
Compiling and running with gfortran 5.4, 7.4, 8.1, gives:
6.00000000 6.00000000
Compiling and running with ifort 18.0 gives:
6.000000 9.000000
This does not happen if f(x) is a function instead of a subroutine, or if the
call to f(x) is made directly in g(x) rather than in R(x).
>From gcc-bugs-return-640836-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:04:34 2019
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Subject: [Bug ipa/89693] [9 Regression] ICE: verify_cgraph_node failed (error: edge points to wrong declaration)
Date: Tue, 16 Apr 2019 11:04:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Yes. (I have just double checked verified GCC 7 is not affected.)
>From gcc-bugs-return-640837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:11:29 2019
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From: "abrodkin at synopsys dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90103] ICE building Glibc's e_atan2f.c with -O2 -mcpu=hs38_linux -frounding-math
Date: Tue, 16 Apr 2019 11:11:00 -0000
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--- Comment #2 from Alexey Brodkin <abrodkin at synopsys dot com> ---
Indeed, proposed back-port fixes that problem!
May we get it back-ported to 8.3.0 branch?
>From gcc-bugs-return-640838-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:23:08 2019
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Subject: [Bug c++/86243] unknown attribute before throw causes hard error
Date: Tue, 16 Apr 2019 11:23:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Hannes Hauswedell from comment #0)
> This strongly looks like a bug. If one encloses the if-block in braces, I
> instead get a warning:
>
> int main()
> {
> if (1 == 2) [[unlikely]]
> {
> throw int{};
> }
>
> return 2;
> }
>
> results in:
>
> % g++7 -std=c++17 test.cpp
> test.cpp: In function 'int main()':
> test.cpp:3:17: warning: attributes at the beginning of statement are ignored
> [-Wattributes]
> if (1 == 2) [[unlikely]]
> ^
That warning is Bug 89962.
But this bug has been fixed by r266223 and the code is accepted now.
>From gcc-bugs-return-640839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:26:22 2019
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From: "rene.rahn@fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 11:26:00 -0000
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--- Comment #6 from rene.rahn@fu-berlin.de ---
Here is the code snippet that triggers the ICE:
#include <range/v3/view/reverse.hpp>
#include <vector>
#include <iostream>
int main()
{
std::vector v{0, 1, 2, 3, 4};
for (auto e : v | ranges::view::reverse)
{
std::cout << e << '\n';
}
return 0;
}
>From gcc-bugs-return-640840-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:28:33 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 11:28:00 -0000
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--- Comment #7 from rene.rahn@fu-berlin.de ---
Created attachment 46177
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46177&action=edit
preprocessed source file from gcc8 (no ICE)
This is the compressed but unreduced preprocessed source file when compiling
with gcc 8.3.0.
>From gcc-bugs-return-640841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:29:24 2019
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Tue, 16 Apr 2019 11:29:00 -0000
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
I'd be happy to help out with any testing of any speculative patch
for this bug.
I am surprised that more than 64 bits of precision are required.
Would a data type like float or double do the job ? Less precision,
more range.
>From gcc-bugs-return-640842-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:36:52 2019
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From: "zhroma at ispras dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/90001] Compile-time hog in swing modulo scheduler
Date: Tue, 16 Apr 2019 11:36:00 -0000
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--- Comment #5 from Roman Zhuykov <zhroma at ispras dot ru> ---
Retested patch separately, everything works.
Have found 2 more slow Fortran examples on (obsolete) spu platform and with
additional options like -O1/O2 -fomit-frame-pointer -funroll-loops -fpeel-loops
-ftracer -finline-functions
gfortran.dg/sms-2.f90
gfortran.dg/forall_10.f90
Compilation|
time, sec |unpatched vs patched| sms options
forall_10 | 35.02 0.66 | -fmodulo-sched
forall_10 | 87.44 0.52 | -fmodulo-sched -fmodulo-sched-allow-regmoves
sms-2 | 34.58 0.44 | -fmodulo-sched
sms-2 | 86.77 0.27 | -fmodulo-sched -fmodulo-sched-allow-regmoves
>From gcc-bugs-return-640843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:39:29 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 11:39:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection,
| |needs-reduction
Status|WAITING |NEW
Known to work| |8.2.0, 8.3.0
Known to fail| |8.1.0, 9.0
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, thanks for test-case. I'm both reducing and bisecting that..
>From gcc-bugs-return-640844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:42:02 2019
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From: "zhroma at ispras dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/90113] New: Useless torture mode for gfortran.dg tests
Date: Tue, 16 Apr 2019 11:42:00 -0000
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Bug ID: 90113
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I’ve recently found that tests, which are placed in gcc/testsuite/gfortran.dg
folder are running in “torture†mode with different optimization options.
While working with PR90001 I’ve looked into sms-2.f90 and forall_10.f90 tests
from gfortran.dg. I analyzed only compilation time in that PR, but also was
wondered with that these tests were compiled several times with lines like:
sms-2.f90:
“-O0 -O2 -fmodulo-schedâ€
“-O1 -O2 -fmodulo-schedâ€
...
“-O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer
-finline-functions -O2 -fmodulo-schedâ€
forall_10.f90
“-O0 -Oâ€
“-O1 -Oâ€
...
“-O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer
-finline-functions -Oâ€
I’ve found a discussion when gfortran.dg/dg.exp was added in 2004, and there
Joseph mentioned “torture†ideas:
https://gcc.gnu.org/ml/gcc-patches/2004-07/msg01131.html
“gcc.c-torture: multiple optimization options, built with -w to disable all
warnings.
gcc.dg: no looping over multiple options, defaults to -ansi -pedantic if
no options given.
gcc.dg/torture: like gcc.dg (so no -w) but loops over multiple options.
Much of gcc.dg that uses some optimization options belongs in there.â€
I’ve started working with gcc a bit later, but I always thought, that same
logic can be applied to other languages. And now I know that in fortran tests
it is broken since that old time.
Looking into recent commits (which add new fortran tests) shows that people
also wrongly suppose that difference between gfortran.fortran-torture and
gfortran.dg is same as in C language test folders (gcc.c-torture and gcc.dg).
So, a lot of tests in gfortran.dg contain optimization level option, and this
leads to many useless torture runs. In most torture option lines only
optimization level is set, and an option inside test overrides that level.
Maybe this broken logic should be fixed and we have to disable torture runs in
gfortran.dg and run them like gcc.dg tests?
>From gcc-bugs-return-640845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:51:50 2019
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Subject: [Bug libstdc++/90102] Incorrect ambiguous overload with _GLIBCXX_DEBUG
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-16
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's definitely a library bug. The problem is shown by the diagnostic messages.
A DEBUG::debug vector can be constructed from a NORMAL::vector, because it has
an extra constructor. Your conversion operator allows your type to convert to
either DEBUG::vector or NORMAL::vector. Both of those types can convert to
DEBUG::vector, so there are two equally good conversion sequences, which is
ambiguous.
>From gcc-bugs-return-640846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 11:59:06 2019
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Subject: [Bug c++/90003] internal compiler error: in tsubst_decl, at cp/pt.c:13783
Date: Tue, 16 Apr 2019 11:59:00 -0000
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--- Comment #4 from rene.rahn@fu-berlin.de ---
Hi gcc-team,
is there any news about this issue?
Let me know, if you need more information.
Kind regards
>From gcc-bugs-return-640847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:01:56 2019
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Subject: [Bug libstdc++/90102] Incorrect ambiguous overload with _GLIBCXX_DEBUG
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> A DEBUG::debug vector
s/DEBUG::debug vector/DEBUG::vector/
>From gcc-bugs-return-640848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:10:21 2019
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Subject: [Bug target/83507] [8 Regression] ICE in internal_dfa_insn_code_* for powerpc targets
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Roman Zhuykov <zhroma at ispras dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zhroma at ispras dot ru
--- Comment #12 from Roman Zhuykov <zhroma at ispras dot ru> ---
Not sure if I have to reopen it, but fix wasn’t correct. In this example we
don’t have -fmodulo-sched-allow-regmoves enabled and we should not create any
register moves at all.
More discussion and proper fix:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00632.html
>From gcc-bugs-return-640849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:14:32 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Tue, 16 Apr 2019 12:14:00 -0000
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--- Comment #49 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #48)
> (In reply to Florian Weimer from comment #47)
> > (In reply to Bernd Edlinger from comment #43)
> > > does anybody know what is the Ada and/or D syntax for that?
> >
> > Syntax for what?
>
> I mean the Ada and D equivalent of
> #pragma GCC target ("general-regs-only")
> and/or
> __attribute__((target("general-regs-only")))
I don't think the target pragma/attribute is supported in Ada.
pragma Machine_Attribute (Subprogram, "target", "general-regs-only");
appears to be ignored (even if I use a string which would be accepted by the
C/C++ pragma for that target, and not "general-regs-only". But it's been years
since I did much Ada programming.
>From gcc-bugs-return-640850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:16:18 2019
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Subject: [Bug libstdc++/90102] Incorrect ambiguous overload with _GLIBCXX_DEBUG
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm not sure if the original testcase is actually required to compile.
Implementations are allowed to add additional constructors, and they could take
an arbitrary type with a .clear() member.
But as a QoI matter we do want the same code to compile with debug mode as for
normal mode.
>From gcc-bugs-return-640851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:29:00 2019
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Subject: [Bug middle-end/90114] New: Predetermined private levels for variables declared in OpenACC accelerator routines
Date: Tue, 16 Apr 2019 12:29:00 -0000
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Bug ID: 90114
Summary: Predetermined private levels for variables declared in
OpenACC accelerator routines
Product: gcc
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Status: UNCONFIRMED
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OpenACC 2.7 (same in 2.6), in section 2.6.1. "Variables with Predetermined Data
Attributes" mandates that "Variables declared in 'seq' routine are private to
the thread that made the call. Variables declared in 'vector' routine are
private to the worker that made the call and shared across the threads
associated with the vector lanes of that worker. Variables declared in 'worker'
or 'gang' routine are private to the gang that made the call and shared across
the threads associated with the workers and vector lanes of that gang".
>From gcc-bugs-return-640852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:30:35 2019
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Subject: [Bug c/90106] builtin sqrt() ignoring libm's sqrt call result
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--- Comment #4 from Frederico Lamberti Pissarra <fredericopissarra at gmail dot com> ---
My suggestion is to do a simple jmp after .L8 label and test the condition
before sqrtss (or fsqrt, or sqrtsd...):
f:
pxor %xmm2,%xmm2
ucomiss %xmm0,%xmm2
ja .L8
sqrtss %xmm0,%xmm0
ret
.L8:
jmp sqrtf@PLT
>From gcc-bugs-return-640854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:38:03 2019
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Subject: [Bug middle-end/90115] New: OpenACC: predetermined private levels for variables declared in blocks
Date: Tue, 16 Apr 2019 12:38:00 -0000
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Bug ID: 90115
Summary: OpenACC: predetermined private levels for variables
declared in blocks
Product: gcc
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Status: UNCONFIRMED
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OpenACC 2.7 (same in 2.6), in section 2.6.1. "Variables with Predetermined Data
Attributes" mandates that "Variables declared in a C block that is executed in
'vector-partitioned' mode are private to the thread associated with each vector
lane. Variables declared in a C block that is executed in 'worker-partitioned'
'vector-single' mode are private to the worker and shared across the threads
associated with the vector lanes of that worker. Variables declared in a C
block that is executed in 'worker-single' mode are private to the gang and
shared across the threads associated with the workers and vector lanes of that
gang".
>From gcc-bugs-return-640853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:38:01 2019
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Subject: [Bug c/90106] builtin sqrt() ignoring libm's sqrt call result
Date: Tue, 16 Apr 2019 12:38:00 -0000
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--- Comment #5 from Frederico Lamberti Pissarra <fredericopissarra at gmail dot com> ---
CLANG 6 creates a similar code:
f:
xorps %xmm1,%xmm1
ucomiss %xmm1,%xmm0
jb .L8 # more intutive test...
sqrtss
ret
.L8:
jmp sqrtf@PLT
>From gcc-bugs-return-640855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:45:45 2019
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Subject: [Bug rtl-optimization/86438] [8 Regression] wrong code at -Os
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--- Comment #12 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Tue Apr 16 12:44:46 2019
New Revision: 270388
URL: https://gcc.gnu.org/viewcvs?rev=270388&root=gcc&view=rev
Log:
[PR86438] avoid too-long shift in test
The test fell back to long long and long when __int128 is not
available, but it assumed sizeof(long) < sizeof(long long) because of
a shift count that would be out of range for a long long if their
widths are the same. Fixed by splitting it up into two shifts.
for gcc/testsuite/ChangeLog
PR rtl-optimization/86438
* gcc.dg/torture/pr86438.c: Split up too-wide shift.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr86438.c
>From gcc-bugs-return-640856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:45:45 2019
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Subject: [Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
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--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Tue Apr 16 12:44:57 2019
New Revision: 270389
URL: https://gcc.gnu.org/viewcvs?rev=270389&root=gcc&view=rev
Log:
[PR89528] reset debug uses of return value when dropping dead RTL call
When we remove an RTL call, we wouldn't clean up references to the
return value of the call in debug insns. Make it so that we do.
for gcc/ChangeLog
PR debug/89528
* valtrack.c (dead_debug_insert_temp): Reset debug references
to the return value of a call being removed.
for gcc/testsuite/ChangeLog
PR debug/89528
* gcc.dg/guality/pr89528.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/guality/pr89528.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/valtrack.c
>From gcc-bugs-return-640857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:48:29 2019
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
Date: Tue, 16 Apr 2019 12:48:00 -0000
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--- Comment #1 from Ian Lance Taylor <ian at airs dot com> ---
The pathnames suggest that this is the -m32 build.
Can you attach the file TARGET/32/libgo/math.gox?
>From gcc-bugs-return-640858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:48:47 2019
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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/90017] gcc generates wrong debug information at -O3
Date: Tue, 16 Apr 2019 12:48:00 -0000
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--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
I think it's more of a missing feature than a bug. I believe GDB folks already
know about this, though maybe not about this specific manifestation thereof.
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Subject: [Bug debug/82738] [meta-bug] issues with the -Og optimization level
Date: Tue, 16 Apr 2019 12:49:00 -0000
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Bug 82738 depends on bug 89528, which changed state.
Bug 89528 Summary: Wrong debug info generated at -Og [gcc-trunk]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89528
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-640859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:49:08 2019
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Subject: [Bug rtl-optimization/89528] Wrong debug info generated at -Og [gcc-trunk]
Date: Tue, 16 Apr 2019 12:49:00 -0000
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
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--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Fixed
>From gcc-bugs-return-640861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:50:17 2019
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Subject: [Bug other/88790] No warning for misleading indentation
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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CC| |daniel.marjamaki at gmail dot com
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Let's try that...
>From gcc-bugs-return-640862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:51:04 2019
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Subject: [Bug other/88790] No warning for misleading indentation
Date: Tue, 16 Apr 2019 12:51:00 -0000
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(Yup, worked).
>From gcc-bugs-return-640863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:55:11 2019
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From: "mpreda at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90050] std::filesystem::path segfault in destructor
Date: Tue, 16 Apr 2019 12:55:00 -0000
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--- Comment #6 from Mihai Preda <mpreda at gmail dot com> ---
OK, thanks.
So if on Ubuntu 19.04, the default compiler produces without errors/warnings,
from valid source code, an executable that crashes, that's programmer error?!
I understand the explanation, but there is a problem. Maybe the bug is not with
gcc but with Ubuntu, but a bug there is.
>From gcc-bugs-return-640864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 12:58:41 2019
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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/89983] Missing debug info for final loop IV value
Date: Tue, 16 Apr 2019 12:58:00 -0000
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
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CC| |aoliva at gcc dot gnu.org
--- Comment #1 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
It appears to me that a debugger with support for location views will address
the problems you reported; I'm not so sure about the first issue (inside the
loop), but certainly the second one (at the asm).
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Subject: [Bug c/90106] builtin sqrt() ignoring libm's sqrt call result
Date: Tue, 16 Apr 2019 13:04:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |NEW
Last reconfirmed| |2019-04-16
CC| |amonakov at gcc dot gnu.org
Resolution|INVALID |---
Ever confirmed|0 |1
--- Comment #6 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Reopening and confirming, GCC's code looks less efficient than possible for no
good reason.
CDCE does
y = sqrt (x);
==>
y = IFN_SQRT (x);
if (__builtin_isless (x, 0))
sqrt (x);
but it could do
y = IFN_SQRT (x);
if (__builtin_isless (x, 0))
y = sqrt (x);
(note two assignments to y)
or to mimic LLVM's approach:
if (__builtin_isless (x, 0))
y = sqrt (x);
else
y = IFN_SQRT (x);
>From gcc-bugs-return-640866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 13:14:54 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 16 Apr 2019 13:14:00 -0000
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--- Comment #73 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Iain Sandoe from comment #68)
> Created attachment 46176 [details]
> revised fixincludes patch.
>
> The patch attached include the generated files, and I'd be grateful if folks
> would test it (right now I have limited access to Darwin test boxen, but it
> seems to DTRT for me) - I will post to @patches, but leave commit until it's
> confirmed that it's working.
This fix works for me on Darwin 10.14.4, XCode 10.2, with r270377.
>From gcc-bugs-return-640867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 13:18:47 2019
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Subject: [Bug libstdc++/90050] std::filesystem::path segfault in destructor
Date: Tue, 16 Apr 2019 13:18:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See https://bugs.launchpad.net/ubuntu/+source/gcc-8/+bug/1824721 where I said:
"for now the short answer is "C++17 support in GCC 8 is experimental, the onus
is on you to link correctly"
>From gcc-bugs-return-640868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 13:26:36 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
Date: Tue, 16 Apr 2019 13:26:00 -0000
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--- Comment #74 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #73)
> (In reply to Iain Sandoe from comment #68)
> > Created attachment 46176 [details]
> > revised fixincludes patch.
>
> >
> > The patch attached include the generated files, and I'd be grateful if folks
> > would test it (right now I have limited access to Darwin test boxen, but it
> > seems to DTRT for me) - I will post to @patches, but leave commit until it's
> > confirmed that it's working.
>
> This fix works for me on Darwin 10.14.4, XCode 10.2, with r270377.
Thanks, does that include a test suite run and/or building something
substantial (e.g. LLVM)? .. sorry to pass this on, but right now as noted, very
limited access to Darwin test resources.
>From gcc-bugs-return-640869-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 13:42:42 2019
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From: "remi.ducceschi at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86953] [7/8 Regression] compiler crashes with constexpr operator== and specific struct (cxx_eval_bit_field_ref, at cp/constexpr.c:2704)
Date: Tue, 16 Apr 2019 13:42:00 -0000
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--- Comment #8 from Rémi Ducceschi <remi.ducceschi at gmail dot com> ---
It seems to be fixed on the last version available on wandbox.org (gcc HEAD
9.0.1 201904): https://wandbox.org/permlink/Tu4T8jEXDDtDw0OS
Though it doesn't work on any other versions (8.3.0...).
Any chance to see the fix in the 8 branch?
Anyway, thanks a lot :)
>From gcc-bugs-return-640870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 13:55:47 2019
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Subject: [Bug target/90088] 3 ops LEA should be avoided on Intel CPUs
Date: Tue, 16 Apr 2019 13:55:00 -0000
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--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
We should first add an LEA microbenchmark to
https://gitlab.com/x86-benchmarks/microbenchmark
>From gcc-bugs-return-640871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:16:57 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46092|0 |1
is obsolete| |
--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 46178
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46178&action=edit
Reduced test-case
>From gcc-bugs-return-640872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:18:44 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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|needs-reduction |
CC| |jason at gcc dot gnu.org
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r269746.
>From gcc-bugs-return-640873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:29:11 2019
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Subject: [Bug c++/65799] Allows constexpr conversion from cv void * to other type
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Blocks| |55004
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Sure, I can look into it sometime in stage 1. But I'm not sure these bugs are
related. The test case in comment #0 and those in pr60760 and pr71091 are
about invalid uses of null pointers in constexpr contexts. The test cases here
don't involve bull pointers. Rejecting invalid casts was the subject of
pr49171 (fixed in r259629).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
[Bug 55004] [meta-bug] constexpr issues
>From gcc-bugs-return-640874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:32:03 2019
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Subject: [Bug c++/90003] internal compiler error: in tsubst_decl, at cp/pt.c:13783
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
CC| |mpolacek at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This is actually a duplicate of 89953.
*** This bug has been marked as a duplicate of bug 89953 ***
>From gcc-bugs-return-640876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:32:44 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 14:32:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Another test: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90003#c3
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 14:32:00 -0000
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--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 90003 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
Date: Tue, 16 Apr 2019 14:34:00 -0000
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Bug 55004 depends on bug 65799, which changed state.
Bug 65799 Summary: Allows constexpr conversion from cv void * to other type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65799
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug c++/65799] Allows constexpr conversion from cv void * to other type
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Eric, could you open a new PR and CC Martin please?
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90080] [8 Regression] SFINAE failure with static_cast
Date: Tue, 16 Apr 2019 14:38:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-16
Known to work| |4.7.1, 7.4.0, 9.0
Summary|SFINAE failure with |[8 Regression] SFINAE
|static_cast |failure with static_cast
Ever confirmed|0 |1
Known to fail| |8.1.0, 8.2.0, 8.3.0
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Alex from comment #0)
> This looks like a regression as a similar error is described here
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44267
Agreed. It works with GCC 7 and with trunk, but not GCC 8.
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Subject: [Bug c++/90080] [8 Regression] SFINAE failure with static_cast
Date: Tue, 16 Apr 2019 14:43:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:
struct false_type { static constexpr bool value = false; };
struct true_type { static constexpr bool value = true; };
template<bool, typename = void> struct enable_if { };
template<typename T> struct enable_if<true, T> { using type = T; };
template<typename T> T&& declval();
template<typename T, typename U, typename = U>
struct is_static_castable : false_type
{};
template<typename T, typename U>
struct is_static_castable<T, U, decltype(static_cast<U>(declval<T>()))> :
true_type
{};
template<typename To, typename From, typename
enable_if<is_static_castable<From*, To*>::value, int>::type = 0>
To* safePtrCast(From* from)
{
return static_cast<To*>(from);
}
template<typename To, typename From, typename
enable_if<!is_static_castable<From*, To*>::value, int>::type = 0>
To* safePtrCast(From* from)
{
return dynamic_cast<To*>(from);
}
struct BarBase{ virtual ~BarBase() = default;};
struct Bar : virtual BarBase{};
Bar* foo(BarBase* b){
return safePtrCast<Bar>(b);
}
This started to fail with r258824:
PR c++/78489 - wrong SFINAE behavior.
PR c++/84489
* pt.c (type_unification_real): Don't defer substitution failure.
And was fixed on trunk by r269921:
PR c++/87748 - substitution failure error with decltype.
This issue is similar to PR 87480; in both cases we were doing
non-dependent
substitution with processing_template_decl set, leading to member access
expressions seeming still instantiation-dependent, and therefore decltype
not being simplified to its actual type. And as in that PR, the fix is to
clear processing_template_decl while substituting a default template
argument.
* pt.c (most_specialized_partial_spec): Clear
processing_template_decl.
So this looks like a dup of that PR, which is still present on gcc-8-branch.
*** This bug has been marked as a duplicate of bug 87748 ***
>From gcc-bugs-return-640880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:43:53 2019
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Subject: [Bug c++/87748] [8 Regression] G++-8 treats SFINAE as error
Date: Tue, 16 Apr 2019 14:43:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alex at grundis dot de
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 90080 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-640882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:44:11 2019
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 14:44:00 -0000
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--- Comment #13 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Adjusted testcase that is compiled with GCC 8.3 without errors:
namespace a {
template <int c> struct d { static constexpr int f = c; };
template <typename> struct g;
template <typename b, typename h = b> h i(int);
template <typename b> auto ab() -> decltype(i<b>(0));
} // namespace a
namespace aa {
template <bool ad> using ae = a::d<ad>;
struct af {
template <typename ac> using ag = ac;
};
template <bool> using ah = af;
template <bool ai, typename ac> using aj = typename ah<ai>::template ag<ac>;
} // namespace aa
namespace a {
template <typename b> class ak {
public:
ak(b);
};
} // namespace a
namespace al {
template <typename> struct am;
template <typename> using an = am<int>;
template <int> struct v { template <typename, typename ao> using ap = ao; };
template <bool ad, typename ac, typename ao>
using aq = typename v<ad>::template ap<ac, ao>;
struct as {
template <typename> void at();
};
bool e();
namespace ar {
template <typename> concept bool au = requires { as::at; };
template <typename, typename> concept bool j = requires { e(); };
template <typename, int> struct k;
template <typename av> struct k<av, true> : aa::ae<j<av, as>> {};
template <typename av> struct l : k<av, au<av>> {};
template <typename av, int> struct m { using aw = aq<l<const int>::f, const
int, av>; };
template <typename av> using n = m<av, au<av>>;
} // namespace ar
template <typename av> struct am : ar::n<av> {
using ax = ar::n<av>;
using typename ax::aw;
auto operator*() -> aw;
auto operator++() -> am;
};
template <typename av, typename ay> auto operator!=(av, ay) -> bool;
template <typename ac> concept bool az = a::g<ac>::f;
struct {
template <int> struct o {};
template <typename ba> using bb = o<az<ba>>;
template <typename ba> auto operator()(ba) noexcept(noexcept(bb<ba>{})) {}
} end;
template <typename u> using p = decltype(a::ab<u>);
template <typename ac> concept bool w = requires(ac q) { end(q); };
template <typename ac> concept bool r = w<ac>;
template <typename ac> concept bool bc = r<ac>;
struct x {
template <typename bd, typename be>
friend auto operator|(bd, be) -> decltype(be ::bf(a::ab<bd>, a::ab<be>()));
};
namespace bg {
template <typename bh> struct y : x {
bh s;
template <typename u, typename bi> static auto bf(u z, bi bj) {
return bj.s(z);
}
};
} // namespace bg
struct bk {
template <bool bl = true> auto begin() -> an<p<aa::aj<bl, int>>>;
int end();
};
namespace bg {
struct bm {
template <typename u> auto operator()(u) -> bk requires bc<u>;
};
y<bm> bn;
} // namespace bg
} // namespace al
void b() {
a::ak t{4};
for (auto e : t | al::bg::bn)
;
}
>From gcc-bugs-return-640883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 14:45:37 2019
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2018-10-25 00:00:00 |2019-4-16
Known to fail|9.0 |
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Another reproducer from PR 90080:
struct false_type { static constexpr bool value = false; };
struct true_type { static constexpr bool value = true; };
template<bool, typename = void> struct enable_if { };
template<typename T> struct enable_if<true, T> { using type = T; };
template<typename T> T&& declval();
template<typename T, typename U, typename = U>
struct is_static_castable : false_type
{};
template<typename T, typename U>
struct is_static_castable<T, U, decltype(static_cast<U>(declval<T>()))> :
true_type
{};
template<typename To, typename From, typename
enable_if<is_static_castable<From*, To*>::value, int>::type = 0>
To* safePtrCast(From* from)
{
return static_cast<To*>(from);
}
template<typename To, typename From, typename
enable_if<!is_static_castable<From*, To*>::value, int>::type = 0>
To* safePtrCast(From* from)
{
return dynamic_cast<To*>(from);
}
struct BarBase{ virtual ~BarBase() = default;};
struct Bar : virtual BarBase{};
Bar* foo(BarBase* b){
return safePtrCast<Bar>(b);
}
90080.cc: In instantiation of ‘struct is_static_castable<BarBase*, Bar*,
Bar*>’:
90080.cc:21:57: required by substitution of ‘template<class To, class From,
typename enable_if<(! is_static_castable<From*, To*>::value), int>::type
<anonymous> > To* safePtrCast(From*) [with To = Bar; From = BarBase; typename
enable_if<(! is_static_castable<From*, To*>::value), int>::type <anonymous> =
<missing>]’
90080.cc:31:30: required from here
90080.cc:12:42: error: cannot convert from pointer to base class ‘BarBase’ to
pointer to derived class ‘Bar’ because the base is virtual
12 | struct is_static_castable<T, U, decltype(static_cast<U>(declval<T>()))>
: true_type
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
90080.cc:12:42: error: cannot convert from pointer to base class ‘BarBase’ to
pointer to derived class ‘Bar’ because the base is virtual
90080.cc: In instantiation of ‘To* safePtrCast(From*) [with To = Bar; From =
BarBase; typename enable_if<is_static_castable<From*, To*>::value, int>::type
<anonymous> = 0]’:
90080.cc:31:30: required from here
90080.cc:18:12: error: cannot convert from pointer to base class ‘BarBase’ to
pointer to derived class ‘Bar’ because the base is virtual
18 | return static_cast<To*>(from);
| ^~~~~~~~~~~~~~~~~~~~~~
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Subject: [Bug libstdc++/90102] Incorrect ambiguous overload with _GLIBCXX_DEBUG
Date: Tue, 16 Apr 2019 14:50:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Possible fix:
--- a/libstdc++-v3/include/debug/vector
+++ b/libstdc++-v3/include/debug/vector
@@ -220,11 +220,11 @@ namespace __debug
~vector() = default;
#endif
+#if __cplusplus < 201103L
/// Construction from a normal-mode vector
vector(const _Base& __x)
: _Base(__x) { }
-#if __cplusplus < 201103L
vector&
operator=(const vector& __x)
{
@@ -234,6 +234,11 @@ namespace __debug
return *this;
}
#else
+ /// Construction from a normal-mode vector
+ template<typename _Up, typename = _Requires<is_same<_Up, _Base>>>
+ vector(const _Up& __x)
+ : _Base(__x) { }
+
vector&
operator=(const vector&) = default;
We'd want to do the same for all the other debug mode containers too.
>From gcc-bugs-return-640885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 15:01:44 2019
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'll come back to this for GCC 10.
Slightly better (and not broken) patch:
--- a/libstdc++-v3/include/debug/vector
+++ b/libstdc++-v3/include/debug/vector
@@ -220,11 +220,11 @@ namespace __debug
~vector() = default;
#endif
+#if __cplusplus < 201103L
/// Construction from a normal-mode vector
vector(const _Base& __x)
: _Base(__x) { }
-#if __cplusplus < 201103L
vector&
operator=(const vector& __x)
{
@@ -234,6 +234,12 @@ namespace __debug
return *this;
}
#else
+ /// Construction from a normal-mode vector
+ template<typename _Up,
+ typename = _Require<is_same<__remove_cvref_t<_Up>, _Base>>>
+ vector(const _Up& __x)
+ : _Base(std::forward<_Base>(__x)) { }
+
vector&
operator=(const vector&) = default;
>From gcc-bugs-return-640886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 15:09:19 2019
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Tony E Lewis from comment #4)
> Are these arguments unpersuasive?
IMHO yes.
Comparison that only work with non-const objects are just bad comparison
functions. They are unusable with maps and sets, because in a const-qualified
member function they might be passed const arguments. They risk modifying their
arguments, which leads to undefined behaviour. In your specific example, taking
the arguments by reference might be less efficient than taking ints by value,
so pessimizes the code.
Requiring comparison objects to be usable as-const and with-const (i.e. when
the comparison function object itself is const, and when the arguments are
const) leads to fewer surprises, and is not especially difficult.
The C++ working draft has been changed to make this program undefined, and I'm
not inclined to make it Just Work.
>From gcc-bugs-return-640887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 15:18:02 2019
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Subject: [Bug target/88809] do not use rep-scasb for inline strlen/memchr
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-16
Ever confirmed|0 |1
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
I would like working on this problem. I've read the Peters very detail analysis
on Stack overflow and I have first couple of questions and observations I've
did:
1) I would suggest to remove usage of 'rep scasb' at all; even for -Os the
price paid is quite huge
2) I've made strlen instrumentation for -fprofile-{generate,use} and collected
SPEC2016 statistics for train runs:
Benchmark strlen calls executed strlen calls total
executions avg. strlen
400.perlbench 102 39 2358804
10.97
401.bzip2 0 0 0
403.gcc 144 21 4081
9.3
410.bwaves 0 0 0
416.gamess 0 0 0
429.mcf 0 0 0
433.milc 3 0 0
434.zeusmp 0 0 0
435.gromacs 86 7 92
12.46
436.cactusADM 110 46 61788
10.61
437.leslie3d 0 0 0
444.namd 0 0 0
445.gobmk 41 7 75196
2.01
447.dealII 3 0 0
450.soplex 8 6 1161517
25.59
453.povray 67 25 54584
33.25
454.calculix 54 0 0
456.hmmer 93 10 52
15.1
458.sjeng 0 0 0
459.GemsFDTD 0 0 0
462.libquantum 0 0 0
464.h264ref 12 1 1
14274.0
465.tonto 0 0 0
470.lbm 0 0 0
471.omnetpp 50 15 24291732
9.79
473.astar 0 0 0
481.wrf 42 15 20490
9.41
482.sphinx3 23 11 402963
1.61
483.xalancbmk 27 3 160
13.04
Columns: Benchmark name, # of strlen calls in the benchmarks, # of strlen calls
that were called
during train run, total number of strlen execution, average strlen
Note: 14274.0 value for 464.h264ref is correct:
content_76 = GetConfigFileContent (filename_53);
_7 = strlen (content_76);
Based on the numbers an average string for which a strlen is called is quite
short (<32B).
3) The assumption that most strlen arguments have a known 16B alignment is
quite optimistic.
As mentioned, {c,}alloc returns a memory aligned to that, but strlen is most
commonly called
for a generic character pointer for which we can't prove the alignment.
4) Peter's suggested ASM expansion assumes such alignment. I expect a bit more
complex
code for a general alignment situation?
5) strlen call has the advantage then even though being compiled with -O2
-march=x86-64 (a distribution options),
the glibc can use ifunc to dispatch to an optimized implementation
6) The decision code in ix86_expand_strlen looks strange to me:
bool
ix86_expand_strlen (rtx out, rtx src, rtx eoschar, rtx align)
{
rtx addr, scratch1, scratch2, scratch3, scratch4;
/* The generic case of strlen expander is long. Avoid it's
expanding unless TARGET_INLINE_ALL_STRINGOPS. */
if (TARGET_UNROLL_STRLEN && eoschar == const0_rtx && optimize > 1
&& !TARGET_INLINE_ALL_STRINGOPS
&& !optimize_insn_for_size_p ()
&& (!CONST_INT_P (align) || INTVAL (align) < 4))
return false;
That explains why we generate 'rep scasb' for -O1.
My suggestions:
- I would use strlen call in all situations
- Maybe I would instrument strlen calls in -fprofile-generate/use and if
there's a strlen
call with a very small average size and a known 4B alignment, I would generate
4B loop
Thghouts?
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----------------------------------------------------------------------------
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87871
--- Comment #26 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Vladimir Makarov from comment #25)
> (In reply to Peter Bergner from comment #24)
>> I don't know why r0 isn't in profitable_regs for pseudo 116.
>
> Profitable regs there contain also conflict regs. R0 is conflicting with
> p106. If R0 usage (in call insn) were in the same BB, your new conflict
> calculation found that there is no actual conflict. But IRA uses
> df-infrastructure which tells IRA that R0 lives at the BB end where p106
> occurs.
I'm sorry, but I don't see where p116 conflicts with r0. Can you show me
where/how? Looking at my IRA dump, I see:
+++Allocating 40 bytes for conflict table (uncompressed size 48)
;; a0(r111,l0) conflicts: a2(r114,l0) a1(r113,l0) a3(r112,l0)
;; total conflict hard regs:
;; conflict hard regs:
;; a1(r113,l0) conflicts: a0(r111,l0) a2(r114,l0) a3(r112,l0)
;; total conflict hard regs:
;; conflict hard regs:
;; a2(r114,l0) conflicts: a0(r111,l0) a1(r113,l0)
;; total conflict hard regs:
;; conflict hard regs:
;; a3(r112,l0) conflicts: a0(r111,l0) a1(r113,l0) a4(r117,l0)
;; total conflict hard regs: 0 12 14
;; conflict hard regs: 0 12 14
;; a4(r117,l0) conflicts: a3(r112,l0)
;; total conflict hard regs:
;; conflict hard regs:
;; a5(r116,l0) conflicts: cp0:a0(r111)<->a4(r117)@330:move
cp1:a2(r114)<->a3(r112)@41:shuffle
cp2:a3(r112)<->a5(r116)@125:shuffle
pref0:a0(r111)<-hr0@2000
pref1:a4(r117)<-hr0@660
pref2:a5(r116)<-hr0@1000
regions=1, blocks=6, points=10
allocnos=6 (big 0), copies=3, conflicts=0, ranges=6
Note: I'm assuming we're missing a \n after p116's empty conflicts above?
So I don't see p116 conflict with r0, but I do see we register a shuffle
between p112 and p116 and p112 does (correctly) conflict with r0. Is it really
the shuffle between p112 and p116 that is preventing us from putting r0 into
p116's profitable regs in the hope the p112 and p116 may get assigned the same
reg allowing the removal of the copy? If so, that shuffle, since it's attached
to the setting of the CC reg cannot actually be removed even if p112 and p116
are assigned the same register. Should we just ignore those types of
shuffles/copies that have other side effects?
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Subject: [Bug go/90116] New: Segmentation fault and what appears to be an implementation error in gofrontend (parse.cc)
Date: Tue, 16 Apr 2019 15:35:00 -0000
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Bug ID: 90116
Summary: Segmentation fault and what appears to be an
implementation error in gofrontend (parse.cc)
Product: gcc
Version: 8.2.0
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Created attachment 46179
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Program that causes segmentation fault
My research entails systematic generation of test cases from grammars. We
picked the golang from the antlr v4 grammar repository, avilable at
https://github.com/antlr/grammars-v4,which is a translation from the golang
language specification available at https://golang.org/ref/spec . Here I
present two issues I uncovered.
1. The following generated programs causes internalcompiler error:
package A; var A[A] A;
Compilation of the above program:
gccgo-8.2 -c -Wall -Wextra
/home/max/experiments/go/pos/pair/4730a8a0-603a-11e9-b473-8f102747f394.go
output:
gccgo-8.2: internal compiler error: Segmentation fault signal terminated
program go1
2. Implementation error of the parser in gcc/go/gofrontend/parse.cc
ggc-go also throws a syntax error on one of the generated programs below:
package A; const(B; C;);
Antlr v4 consumes the program correctly without throwing out any parse errors
and gccgo-8.2 compalins that '=' is expected.
One rule is of interest
ConstSpec = IdentifierList [ [ CompleteType ] "=" ExpressionList ] .
The above rule is from golang language specification and also included
commented in file parse.cc at line 1440 the method that implements the rule
follows at 1442. And it shows that '=' is optional. The go compiler implements
the hand written recursive descent parser. I came to think that the parser in
the gccgo does not implement the grammar (language spec) .
Rules involving that program to show its syntax is valid:
ConstDecl = "const" ( ConstSpec | "(" { ConstSpec ";" } ")" ) .
ConstSpec = IdentifierList [ [ CompleteType ] "=" ExpressionList ] .
IdentifierList = identifier { "," identifier } .
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Subject: [Bug go/90116] Segmentation fault and what appears to be an implementation error in gofrontend (parse.cc)
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--- Comment #1 from Moeketsi Raselimo <22374604 at sun dot ac.za> ---
Created attachment 46180
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46180&action=edit
gccgo-8.2 throws syntax error on this one
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 15:46:00 -0000
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--- Comment #14 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The problem is that here
24072 /* Instantiate a dynamic exception-specification. noexcept will be
24073 handled below. */
24074 if (tree raises = TYPE_RAISES_EXCEPTIONS (TREE_TYPE
(code_pattern)))
24075 if (TREE_VALUE (raises))
24076 {
24077 specs = tsubst_exception_specification (TREE_TYPE
(code_pattern),
24078 args, tf_error,
NULL_TREE,
24079 /*defer_ok*/false);
raises is NOEXCEPT_EXPR<{}>, but its TREE_VALUE is null, so we don't
substitute.
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Subject: [Bug target/84369] test case gcc.dg/sms-10.c fails on power9
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--- Comment #5 from pthaugen at gcc dot gnu.org ---
Author: pthaugen
Date: Tue Apr 16 15:58:02 2019
New Revision: 270394
URL: https://gcc.gnu.org/viewcvs?rev=270394&root=gcc&view=rev
Log:
PR target/84369
* config/rs6000/power9.md: Add store forwarding bypass.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/power9.md
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #50 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Florian Weimer from comment #49)
> (In reply to Bernd Edlinger from comment #48)
> > (In reply to Florian Weimer from comment #47)
> > > (In reply to Bernd Edlinger from comment #43)
> > > > does anybody know what is the Ada and/or D syntax for that?
> > >
> > > Syntax for what?
> >
> > I mean the Ada and D equivalent of
> > #pragma GCC target ("general-regs-only")
> > and/or
> > __attribute__((target("general-regs-only")))
>
> I don't think the target pragma/attribute is supported in Ada.
>
> pragma Machine_Attribute (Subprogram, "target", "general-regs-only");
>
> appears to be ignored (even if I use a string which would be accepted by the
> C/C++ pragma for that target, and not "general-regs-only". But it's been
> years since I did much Ada programming.
I don't understand why we are discussing Ada, because gcc/ada/raise_gcc.c, the
TU containing the Ada personality routine, is written in C.
The only problem is the D personality routine, which is written in D. And in
that case IMHO we can just use -mgeneral-regs-only on the command line for arm
in the Makefiles or something similar.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-16
Ever confirmed|0 |1
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #27 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #26)
> ;; a4(r117,l0) conflicts: a3(r112,l0)
> ;; total conflict hard regs:
> ;; conflict hard regs:
>
> ;; a5(r116,l0) conflicts: cp0:a0(r111)<->a4(r117)@330:move
> cp1:a2(r114)<->a3(r112)@41:shuffle
> cp2:a3(r112)<->a5(r116)@125:shuffle
> pref0:a0(r111)<-hr0@2000
> pref1:a4(r117)<-hr0@660
> pref2:a5(r116)<-hr0@1000
> regions=1, blocks=6, points=10
> allocnos=6 (big 0), copies=3, conflicts=0, ranges=6
>
> Note: I'm assuming we're missing a \n after p116's empty conflicts above?
The code is
fputs (" conflicts:", file);
n = ALLOCNO_NUM_OBJECTS (a);
for (i = 0; i < n; i++)
{
ira_object_t obj = ALLOCNO_OBJECT (a, i);
ira_object_t conflict_obj;
ira_object_conflict_iterator oci;
if (OBJECT_CONFLICT_ARRAY (obj) == NULL)
continue;
[...]
}
and the
;; total conflict hard regs:
etc. prints are in that [...].
>From gcc-bugs-return-640897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 17:08:50 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Tue, 16 Apr 2019 17:08:00 -0000
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--- Comment #28 from Peter Bergner <bergner at gcc dot gnu.org> ---
Vlad, in looking at add_insn_allocno_copies(), it looks like it relies on
seeing REG_DEAD notes on whether to record a copy/shuffle that should be
handled. Shouldn't we instead be looking at whether the source and destination
regs conflict or not? Ie, there might not be a REG_DEAD note, but that doesn't
mean the two regs/pseudos conflict. And conversely, if there is a REG_DEAD
note on the copy/shuffle, the two regs/pseudos still could conflict.
>From gcc-bugs-return-640898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 17:10:03 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #75 from Jürgen Reuter <juergen.reuter at desy dot de> ---
(In reply to Iain Sandoe from comment #74)
> Thanks, does that include a test suite run and/or building something
> substantial (e.g. LLVM)? .. sorry to pass this on, but right now as noted,
> very limited access to Darwin test resources.
Well, our own code compiles and tests correctly, but that is Fortran2018 with
some C++ interfaces to external libraries. LLVM does not compile, but I guess
this is unrelated to the problem here:
[ 38%] Building CXX object
lib/DebugInfo/PDB/CMakeFiles/LLVMDebugInfoPDB.dir/PDBContext.cpp.o
In file included from
/Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/IPDBSession.h:12,
from
/Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/PDBContext.h:13,
from
/Users/reuter/local/packages/llvm-project/llvm/lib/DebugInfo/PDB/PDBContext.cpp:9:
/Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/PDBSymbol.h:20:37:
error: invalid use of incomplete type 'const class llvm::pdb::PDBSymbolData'
20 | auto MethodName() const->decltype(RawSymbol->MethodName()) {
\
| ^~~~~~~~~
/Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/PDBSymbolData.h:27:3:
note: in expansion of macro 'FORWARD_SYMBOL_METHOD'
27 | FORWARD_SYMBOL_METHOD(getAccess)
| ^~~~~~~~~~~~~~~~~~~~~
>From gcc-bugs-return-640899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 17:10:54 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #29 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #27)
> > Note: I'm assuming we're missing a \n after p116's empty conflicts above?
>
> The code is
Right. I already whipped up a patch that gives me:
;; a5(r116,l0) conflicts:
;; total conflict hard regs:
;; conflict hard regs:
cp0:a0(r111)<->a4(r117)@330:move
...
>From gcc-bugs-return-640900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 17:20:30 2019
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Subject: [Bug go/90116] Segmentation fault and what appears to be an implementation error in gofrontend (parse.cc)
Date: Tue, 16 Apr 2019 17:20:00 -0000
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Ian Lance Taylor <ian at airs dot com> ---
I can recreate the compiler crash with GCC 8 branch, but it is fixed on trunk.
On trunk I get
foo.go:3:7: error: array bound is not constant
3 | var A[A] A
| ^
foo.go:3:7: error: expected type
Your second case is not a bug. The Go language specification expresses
constraints in the text that are not expressed in the formal grammar. In the
discussion of constant declaration, the spec says "Within a parenthesized const
declaration list the expression list may be omitted from any but the first
ConstSpec." In your example the expression list is omitted from the first
ConstSpec, so the compiler is correct in reporting a parse error.
>From gcc-bugs-return-640901-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 17:29:40 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #76 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #75)
> (In reply to Iain Sandoe from comment #74)
>
> > Thanks, does that include a test suite run and/or building something
> > substantial (e.g. LLVM)? .. sorry to pass this on, but right now as noted,
> > very limited access to Darwin test resources.
>
> Well, our own code compiles and tests correctly, but that is Fortran2018
> with some C++ interfaces to external libraries.
Good
> LLVM does not compile, but I
> guess this is unrelated to the problem here:
> [ 38%] Building CXX object
> lib/DebugInfo/PDB/CMakeFiles/LLVMDebugInfoPDB.dir/PDBContext.cpp.o
> In file included from
> /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> IPDBSession.h:12,
> from
> /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> PDBContext.h:13,
> from
> /Users/reuter/local/packages/llvm-project/llvm/lib/DebugInfo/PDB/PDBContext.
> cpp:9:
> /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> PDBSymbol.h:20:37: error: invalid use of incomplete type 'const class
> llvm::pdb::PDBSymbolData'
> 20 | auto MethodName() const->decltype(RawSymbol->MethodName()) {
> \
> | ^~~~~~~~~
> /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> PDBSymbolData.h:27:3: note: in expansion of macro 'FORWARD_SYMBOL_METHOD'
> 27 | FORWARD_SYMBOL_METHOD(getAccess)
> | ^~~~~~~~~~~~~~~~~~~~~
This either a regression (since trunk GCC built LLVM ≈ 2 months ago) or it's a
new feature exposing some other bug in LLVM - either way, you are right, it
doesn't appear related to the current patch. I will attempt to see if it's
repeatable on Linux,
>From gcc-bugs-return-640902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 17:46:23 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #77 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #76)
> (In reply to Jürgen Reuter from comment #75)
> > LLVM does not compile, but I
> > guess this is unrelated to the problem here:
> > [ 38%] Building CXX object
> > lib/DebugInfo/PDB/CMakeFiles/LLVMDebugInfoPDB.dir/PDBContext.cpp.o
> > In file included from
> > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > IPDBSession.h:12,
> > from
> > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > PDBContext.h:13,
> > from
> > /Users/reuter/local/packages/llvm-project/llvm/lib/DebugInfo/PDB/PDBContext.
> > cpp:9:
> > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > PDBSymbol.h:20:37: error: invalid use of incomplete type 'const class
> > llvm::pdb::PDBSymbolData'
> > 20 | auto MethodName() const->decltype(RawSymbol->MethodName()) {
> > \
> > | ^~~~~~~~~
> > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > PDBSymbolData.h:27:3: note: in expansion of macro 'FORWARD_SYMBOL_METHOD'
> > 27 | FORWARD_SYMBOL_METHOD(getAccess)
> > | ^~~~~~~~~~~~~~~~~~~~~
>
> This either a regression (since trunk GCC built LLVM ≈ 2 months ago) or it's
> a new feature exposing some other bug in LLVM - either way, you are right,
> it doesn't appear related to the current patch. I will attempt to see if
> it's repeatable on Linux,
Fails the same way on Linux - so, as noted, it's either a regression or an
improved error detection for some other issue.
>From gcc-bugs-return-640903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 18:01:41 2019
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90109] gstabs flag generates wrong entry for long on x86_64
Date: Tue, 16 Apr 2019 18:01:00 -0000
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--- Comment #2 from Jim Wilson <wilson at gcc dot gnu.org> ---
long long and long double did not exist when stabs was invented. Also, 64-bit
machines and C++ did not exist at the time. Also, unfortunately, stabs wasn't
designed to be extensible. So there is no way to describe anything that
doesn't exist in K&R C without using incompatible extensions, such as those
enabled by the the gdb stabs extensions.
So yes, invalid, though I'd add an extra caution that stabs should only be used
if you need compatibility with old obsolete systems. Otherwise, it is a waste
of time, as we stopped actively maintaining it about a decade ago, and probably
should just drop the support from gcc.
>From gcc-bugs-return-640904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 18:29:52 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
Date: Tue, 16 Apr 2019 18:29:00 -0000
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--- Comment #15 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #14)
> The problem is that here
> 24072 /* Instantiate a dynamic exception-specification. noexcept will
> be
> 24073 handled below. */
> 24074 if (tree raises = TYPE_RAISES_EXCEPTIONS (TREE_TYPE
> (code_pattern)))
> 24075 if (TREE_VALUE (raises))
> 24076 {
> 24077 specs = tsubst_exception_specification (TREE_TYPE
> (code_pattern),
> 24078 args, tf_error,
> NULL_TREE,
> 24079 /*defer_ok*/false);
>
> raises is NOEXCEPT_EXPR<{}>, but its TREE_VALUE is null, so we don't
> substitute.
...which is fine, we should have handled this in maybe_instantiate_noexcept, it
seems.
>From gcc-bugs-return-640905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 18:46:29 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90117] New: Replace %<%s%> with %qs
Date: Tue, 16 Apr 2019 18:46:00 -0000
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Bug ID: 90117
Summary: Replace %<%s%> with %qs
Product: gcc
Version: 9.0
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In most cases %<%s%> is equivalent to the simpler %qs, therefore the latter
should be used consistently.
Surprisingly there is one exception in error.c, which is already well
documented:
/* We have to use "%<%s%>" rather than "%qs" here in order to avoid
quoting colorization bytes within the results. */
pp_printf (&tmp_pp, "%<%s%>", content);
The 17 other occurrences of %<%s%> look like the respective author just didn't
know about %qs. These should be changed to the simpler %qs.
A linter check should be added so that future code doesn't introduce the same
inconsistency. I had already reported some similar issues in 2017, and I don't
want to do that again in 2020.
>From gcc-bugs-return-640906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 18:53:07 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90118] New: Missing space between words
Date: Tue, 16 Apr 2019 18:53:00 -0000
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Bug ID: 90118
Summary: Missing space between words
Product: gcc
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From aarch64.c:
error ("incompatible options %<-mstack-protector-guard=global%> and"
"%<-mstack-protector-guard-offset=%s%>",
aarch64_stack_protector_guard_offset_str);
There should be a space between "and" and the opening "%<".
The linter should be extended to flag all places where %< appears without a
leading space. This rule could prevent further bugs like this. The rule might
need some adjustments, of course, which the first test run will show.
>From gcc-bugs-return-640907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:06:58 2019
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Subject: [Bug libstdc++/90105] std::forward_list::sort() is not "stable"
Date: Tue, 16 Apr 2019 19:06:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is the fix:
--- a/libstdc++-v3/include/bits/forward_list.tcc
+++ b/libstdc++-v3/include/bits/forward_list.tcc
@@ -469,9 +469,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
__p = static_cast<_Node*>(__p->_M_next);
--__psize;
}
- else if (__comp(*__p->_M_valptr(), *__q->_M_valptr()))
+ else if (!__comp(*__q->_M_valptr(), *__p->_M_valptr()))
{
- // First node of p is lower; e must come from p.
+ // First node of q is not lower; e must come from p.
__e = __p;
__p = static_cast<_Node*>(__p->_M_next);
--__psize;
>From gcc-bugs-return-640908-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:07:08 2019
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Subject: [Bug translation/90119] New: Merge translation msgids that only differ in placeholders
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Bug ID: 90119
Summary: Merge translation msgids that only differ in
placeholders
Product: gcc
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There are the following msgids:
bad value %qs for %<-mtrap-precision%> switch
bad value %qs for %<-mfp-rounding-mode%> switch
bad value %qs for %<-mfp-trap-mode%> switch
bad value %qs for %<-mcpu%> switch
These are boring to translate and increase the likelyhood of copy-and-paste
translation errors. It would be better if there were only a single msgid to be
translated:
bad value %qs for %qs switch
This means less work for the translators, and less chances of introducing
translation errors.
The translation linter should find msgids that only differ in plain text
enclosed by %< and %>. The following msgid should not be merged since it is
more complicated to fix:
bad value %qs for %<-mcpu=%s%> switch
That is, only msgids that are the same after s,%<[^%]+%>,%<%>,g should be
suggestted to be merged. There might be other special characters that I forgot.
>From gcc-bugs-return-640909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:07:18 2019
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Subject: [Bug c++/86953] [7/8 Regression] compiler crashes with constexpr operator== and specific struct (cxx_eval_bit_field_ref, at cp/constexpr.c:2704)
Date: Tue, 16 Apr 2019 19:07:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 16 19:06:41 2019
New Revision: 270396
URL: https://gcc.gnu.org/viewcvs?rev=270396&root=gcc&view=rev
Log:
PR c++/86953
* g++.dg/cpp0x/constexpr-86953.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-86953.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-640910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:10:43 2019
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Subject: [Bug target/79869] i18n: document placeholders for translators
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
ping? Two years later, and I still don't know how to translate this string into
proper German.
>From gcc-bugs-return-640911-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:15:58 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90120] New: inconsistent punctuation in translation messages
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Bug ID: 90120
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From arc.c:
error ("Option %s=%s is not available for %s CPU.", \
DOC0, DOC1, arc_selected_cpu->name); \
warning (0, "Option %s is ignored, the default value %s" \
" is considered for %s CPU.", DOC0, DOC1, \
arc_selected_cpu->name); \
error ("Option %s is not available for %s CPU", \
DOC, arc_selected_cpu->name); \
warning (0, "Unset option %s is ignored, it is always" \
" enabled for %s CPU.", DOC, \
The second error does not end in a period. All these diagnostics should use
consistent grammar since they all are full sentences.
>From gcc-bugs-return-640912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:23:03 2019
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Subject: [Bug translation/90119] Merge translation msgids that only differ in placeholders
Date: Tue, 16 Apr 2019 19:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90119
--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
Next example from avr.c:
%<-fpic%> is not supported
%<-fPIC%> is not supported
%<-fpie%> is not supported
%<-fPIE%> is not supported
>From gcc-bugs-return-640913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:24:47 2019
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From: "stoyanovmk at ornl dot gov" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90105] std::forward_list::sort() is not "stable"
Date: Tue, 16 Apr 2019 19:24:00 -0000
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--- Comment #2 from stoyanovmk at ornl dot gov ---
Tested the fix provided by Jonathan Wakely, I can confirm the fix.
Ran several tests with the included small example and the code where I found
the issue in the first place.(In reply to Jonathan Wakely from comment #1)
> I think this is the fix:
>
> --- a/libstdc++-v3/include/bits/forward_list.tcc
> +++ b/libstdc++-v3/include/bits/forward_list.tcc
> @@ -469,9 +469,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
> __p = static_cast<_Node*>(__p->_M_next);
> --__psize;
> }
> - else if (__comp(*__p->_M_valptr(), *__q->_M_valptr()))
> + else if (!__comp(*__q->_M_valptr(), *__p->_M_valptr()))
> {
> - // First node of p is lower; e must come from p.
> + // First node of q is not lower; e must come from p.
> __e = __p;
> __p = static_cast<_Node*>(__p->_M_next);
> --__psize;
Tested the fix, I can confirm it works.
Ran several tests with the included small example and the code where I found
the issue in the first place.
>From gcc-bugs-return-640914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:26:40 2019
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Subject: [Bug translation/90121] New: extra space in error message
Date: Tue, 16 Apr 2019 19:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90121
Bug ID: 90121
Summary: extra space in error message
Product: gcc
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From cris.c:
error ("unknown CRIS version specification in %<-march=%> or "
"%<-mcpu=%> : %s", cris_cpu_str);
The space before the colon is too much.
>From gcc-bugs-return-640915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 19:28:34 2019
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Subject: [Bug translation/90121] extra space in error message
Date: Tue, 16 Apr 2019 19:28:00 -0000
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
Same for:
error ("unknown CRIS cpu version specification in %<-mtune=%> : %s",
cris_tune_str);
>From gcc-bugs-return-640916-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 20:09:53 2019
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
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--- Comment #53 from Jeffrey A. Law <law at redhat dot com> ---
Realistically the register allocation issues are not going to get addressed
this cycle nor are improvements to the overall handling of RMW insns in
combine. So we're going to be stuck with bandaids.
I've got an updated backend pattern that should address the remainder of the
insv_1 and insv_2 regressions and Steve has a backend pattern to address the
other regression in this BZ.
>From gcc-bugs-return-640917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 20:24:40 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/90122] New: inequality of addresses of distinct objects not folded
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Bug ID: 90122
Summary: inequality of addresses of distinct objects not folded
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In the test case below GCC folds the second test (as expected, on the
assumption that distinct declarations refer to distinct objects) but fails to
fold the first.
Clang folds both (into false and true, respectively). GCC will only do that if
a and b are static or local.
Same with extern arrays of known size.
$ cat x.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout
-fno-common x.c
extern int a, b;
void foo ();
void bar ();
void f (void)
{
if (&a == &b)
foo ();
int i = a;
b = 0;
if (i != a)
bar ();
}
;; Function f (f, funcdef_no=0, decl_uid=1910, cgraph_uid=1, symbol_order=2)
Removing basic block 5
f ()
{
<bb 2> [local count: 1073741824]:
if (&a == &b)
goto <bb 3>; [17.43%]
else
goto <bb 4>; [82.57%]
<bb 3> [local count: 187153200]:
foo ();
<bb 4> [local count: 1073741824]:
b = 0;
return;
}
>From gcc-bugs-return-640918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 21:07:51 2019
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Subject: [Bug target/84369] test case gcc.dg/sms-10.c fails on power9
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Pat Haugen <pthaugen at linux dot ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Pat Haugen <pthaugen at linux dot ibm.com> ---
Fixed.
>From gcc-bugs-return-640919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 21:54:12 2019
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Subject: [Bug tree-optimization/90122] inequality of addresses of distinct objects not folded
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Sebor from comment #0)
> In the test case below GCC folds the second test (as expected, on the
> assumption that distinct declarations refer to distinct objects) but fails
> to fold the first.
>
> Clang folds both (into false and true, respectively). GCC will only do that
> if a and b are static or local.
>
> Same with extern arrays of known size.
>
> $ cat x.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout
> -fno-common x.c
> extern int a, b;
Why can't a and b point to the same address?
>From gcc-bugs-return-640921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 22:27:03 2019
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Subject: [Bug tree-optimization/90122] inequality of addresses of distinct objects not folded
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thanks for the pointer! I forgot about that ancient bug. It looks like an
exact duplicate of pr43565.
A and b's addresses must be different because they are distinct declarations of
different objects. There's no way (in standard C) to make them refer to the
same object. That GCC itself relies on different declarations denoting
distinct objects is evident from the second if being eliminated.
*** This bug has been marked as a duplicate of bug 43565 ***
>From gcc-bugs-return-640920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 22:27:03 2019
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Subject: [Bug tree-optimization/43565] Missed address comparison folding of DECL_COMMONs
Date: Tue, 16 Apr 2019 22:27:00 -0000
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--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 90122 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-640922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 22:31:46 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/43565] Missed address comparison folding of DECL_COMMONs
Date: Tue, 16 Apr 2019 22:31:00 -0000
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--- Comment #13 from Martin Sebor <msebor at gcc dot gnu.org> ---
As noted in the duplicate pr90122, the test case below shows that GCC already
relies on different extern declarations denoting distinct objects. It just
doesn't fold the address equality expression for some reason.
$ cat x.c && gcc -O2 -S -Wall -Wextra -fdump-tree-optimized=/dev/stdout
-fno-common x.c
extern int a, b;
void foo ();
void bar ();
void f (void)
{
if (&a == &b) // not folded
foo ();
int i = a;
b = 0;
if (i != a) // folded to false
bar ();
}
;; Function f (f, funcdef_no=0, decl_uid=1910, cgraph_uid=1, symbol_order=2)
Removing basic block 5
f ()
{
<bb 2> [local count: 1073741824]:
if (&a == &b)
goto <bb 3>; [17.43%]
else
goto <bb 4>; [82.57%]
<bb 3> [local count: 187153200]:
foo ();
<bb 4> [local count: 1073741824]:
b = 0;
return;
}
>From gcc-bugs-return-640923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 22:32:08 2019
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Subject: [Bug libstdc++/90105] std::forward_list::sort() is not "stable"
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch posted to https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00669.html
>From gcc-bugs-return-640925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 23:07:56 2019
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Subject: [Bug libstdc++/89819] [9 Regression] std::variant operators regressed since GCC 8.3
Date: Tue, 16 Apr 2019 23:07:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Somewhat trimmed down testcase... Certainly easier to analyze...
typedef __SIZE_TYPE__ size_t;
typedef unsigned long int uintmax_t;
struct group
{
char *gr_name;
char *gr_passwd;
unsigned gr_gid;
char **gr_mem;
};
struct passwd
{
char *pw_name;
char *pw_passwd;
unsigned pw_uid;
unsigned pw_gid;
char *pw_gecos;
char *pw_dir;
char *pw_shell;
};
extern struct group *getgrnam (const char *);
extern struct group *getgrgid (unsigned);
extern void endgrent (void);
extern struct passwd *getpwnam (const char *);
extern void endpwent (void);
extern unsigned long int strtoul (const char *__restrict,
char **__restrict, int);
char const *
parse_with_separator (char const *spec, char const *separator,
unsigned *uid, unsigned *gid,
char **username, char **groupname)
{
static const char *E_bad_spec = "invalid spec";
const char *error_msg;
char *u;
char const *g;
struct group *grp;
unsigned unum = *uid;
error_msg = 0;
u = 0;
if (separator == 0)
u = __builtin_strdup (spec);
size_t ulen = separator - spec;
u = __builtin_malloc (ulen + 1);
g = (separator == 0 || *(separator + 1) == '\0' ? 0 : separator + 1);
if (u != 0)
{
_Bool use_login_group = (separator != 0 && g == 0);
if (use_login_group)
error_msg = E_bad_spec;
endpwent ();
}
if (g != 0 && error_msg == 0)
grp = (*g == '+' ? 0 : getgrnam (g));
if (error_msg == 0)
*uid = unum;
return 0;
}
>From gcc-bugs-return-640924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 23:07:34 2019
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Subject: [Bug middle-end/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Tue, 16 Apr 2019 23:07:00 -0000
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--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
Making some progress here. Working with a reduced testcase we have the
following key blocks as we enter DOM:
;; basic block 3, loop depth 0
;; pred: 2
__builtin_strdup (spec_22(D));
_56 = separator_21(D) - spec_22(D);
ulen_57 = (size_t) _56;
_58 = ulen_57 + 1;
u_60 = __builtin_malloc (_58);
goto <bb 14>; [100.00%]
;; succ: 14
;; basic block 4, loop depth 0
;; pred: 15
iftmp.0_27 = separator_21(D) + 1;
goto <bb 14>; [100.00%]
;; succ: 14
;; basic block 5, loop depth 0
;; pred: 14
# error_msg_40 = PHI <0B(14)>
# iftmp.0_50 = PHI <iftmp.0_54(14)>
endpwent ();
_51 = iftmp.0_50 != 0B;
_52 = error_msg_40 == 0B;
_53 = _51 & _52;
if (_53 != 0)
goto <bb 7>; [49.98%]
else
goto <bb 10>; [50.02%]
;; succ: 7
;; 10
;; basic block 6, loop depth 0
;; pred: 13
# error_msg_11 = PHI <"invalid spec"(13)>
# iftmp.0_67 = PHI <0B(13)>
endpwent ();
_7 = iftmp.0_67 != 0B;
_8 = error_msg_11 == 0B;
_9 = _7 & _8;
if (_9 != 0)
goto <bb 7>; [49.98%]
else
goto <bb 9>; [50.02%]
;; succ: 7
;; 9
;; basic block 7, loop depth 0
;; pred: 6
;; 12
;; 5
# iftmp.0_68 = PHI <iftmp.0_67(6), iftmp.0_69(12), iftmp.0_50(5)>
_10 = *iftmp.0_68;
if (_10 != 43)
goto <bb 8>; [48.88%]
else
goto <bb 10>; [51.12%]
;; succ: 8
;; 10
[ ... ]
;; basic block 12, loop depth 0
;; pred: 14
;; 13
# iftmp.0_69 = PHI <iftmp.0_54(14), 0B(13)>
_44 = iftmp.0_69 != 0B;
_45 = 1;
_46 = _44 & _45;
if (_46 != 0)
goto <bb 7>; [100.00%]
else
goto <bb 10>; [0.00%]
;; succ: 7
;; 10
[ ... ]
;; basic block 14, loop depth 0
;; pred: 3
;; 4
# iftmp.0_54 = PHI <0B(3), iftmp.0_27(4)>
# u_74 = PHI <u_60(3), u_66(4)>
if (u_74 != 0B)
goto <bb 5>; [76.89%]
else
goto <bb 12>; [23.11%]
;; succ: 5
;; 12
We find some jump threading opportunities. What's most interesting to note is
the thread of control bb3->bb14->bb5->bb7.
This is an infeasible path -- it can't happen at runtime. But we also can't
simplify it in DOM. We need jump threading & cleanup_cfg to simplify the CFG.
After DOM's jump threading pass is complete, the CFG is cleaned up and we've
incrementally updated the SSA form we'll have:
;; basic block 3, loop depth 0
;; pred: 2
__builtin_strdup (spec_22(D));
_41 = (long int) spec_22(D);
_56 = -_41;
ulen_57 = (size_t) _56;
_58 = ulen_57 + 1;
u_60 = __builtin_malloc (_58);
if (u_60 != 0B)
goto <bb 5>; [100.00%]
else
goto <bb 16>; [0.00%]
;; succ: 5
;; 16
[ First note that the test originally from bb14 has been moved up into bb3 ]
;; basic block 5, loop depth 0
;; pred: 3
# error_msg_40 = PHI <0B(3)>
# iftmp.0_50 = PHI <0B(3)>
endpwent ();
_51 = 0;
_52 = 1;
_53 = _51;
if (_51 != 0)
goto <bb 7>; [0.00%]
else
goto <bb 9>; [100.00%]
;; succ: 7
;; 9
The combination of threading and cfgcleanup has exposed the constants. But
DOM is complete at this point and thus we don't get another change to optimize
the block.
And bb7 will look like:
;; basic block 7, loop depth 0
;; pred: 15
;; 11
;; 5
# iftmp.0_68 = PHI <iftmp.0_27(15), iftmp.0_69(11), 0B(5)>
_10 = *iftmp.0_68;
if (_10 != 43)
goto <bb 8>; [48.88%]
else
goto <bb 9>; [51.12%]
;; succ: 8
;; 9
Notice how the value 0 flows in from bb5 for iftmp.0_68 which we then
dereference. It's still an infeasible path, but without another DOM pass,
predicate analysis or something similar, we're going to issue the false
positive.
So we already know that iterated DOM/jump threading is too expensive. We could
move the path isolation bits later -- like after dom3 which would fix this
regression, but probably introduce others.
Ultimately it's the usual phase ordering problem.
As I've noted in other BZs, I've never come up with an algorithm that would
allow us to do some kind of worklist approach to replicate iterated
dom+threading.
But I have speculated that we could get most of the benefit by identifying a
subset of blocks and running a local (block only) simplifier. On my whiteboard
one of the filters to identify the subset of blocks would be blocks with
degenerate PHIs. bb5 in this case would qualify and we'd see that bb5's
conditional is always false and thus the edge bb5->bb7 can be deleted which
would in turn eliminate the false positive.
One of the questions that came up for me was whether or not phi-only cprop
would help here. It doesn't. It only looks at degenerate PHIs to build its
worklist of SSA_NAMEs to try and propagate away. Look at bb5. While there are
degenerate PHIs, they do not feed anything useful. We'd actually have to run a
more thorough constant propagation. Something to ponder.
Anyway, wanted to get my thoughts recorded so I don't forget anything.
>From gcc-bugs-return-640926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 16 23:21:49 2019
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Subject: [Bug libfortran/79540] [7/8 Regression] FAIL: gfortran.dg/fmt_fw_d.f90 -O0 execution test
Date: Tue, 16 Apr 2019 23:21:00 -0000
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--- Comment #27 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Tue Apr 16 23:21:13 2019
New Revision: 270398
URL: https://gcc.gnu.org/viewcvs?rev=270398&root=gcc&view=rev
Log:
PR libgfortran/79540
* io/write_float.def (build_float_string): Don't copy digits when
ndigits is negative.
Modified:
branches/gcc-8-branch/libgfortran/ChangeLog
branches/gcc-8-branch/libgfortran/io/write_float.def
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Subject: [Bug libfortran/79540] [7/8 Regression] FAIL: gfortran.dg/fmt_fw_d.f90 -O0 execution test
Date: Wed, 17 Apr 2019 00:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79540
--- Comment #28 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Wed Apr 17 00:22:23 2019
New Revision: 270402
URL: https://gcc.gnu.org/viewcvs?rev=270402&root=gcc&view=rev
Log:
PR libgfortran/79540
* io/write_float.def (build_float_string): Don't copy digits when
ndigits is negative.
Modified:
branches/gcc-7-branch/libgfortran/ChangeLog
branches/gcc-7-branch/libgfortran/io/write_float.def
>From gcc-bugs-return-640928-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 00:25:07 2019
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Subject: [Bug libfortran/79540] [7/8 Regression] FAIL: gfortran.dg/fmt_fw_d.f90 -O0 execution test
Date: Wed, 17 Apr 2019 00:24:00 -0000
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John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #29 from John David Anglin <danglin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-640929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 00:27:55 2019
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From: "iris.041619 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90123] New: "/usr/include/string.h", line 44: syntax error at token '__dest'
Date: Wed, 17 Apr 2019 00:27:00 -0000
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Bug ID: 90123
Summary: "/usr/include/string.h", line 44: syntax error at
token '__dest'
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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I am compiling a C program on CentOS 6.8 and I see a lot of syntax errors in
gcc include header files at token '__???__', but it can generate the binary
eventually. I am confused what went wrong with my /usr/include/*.h. Here is
part of the log file. The cproto version I am using is 4.6 and I tried gcc
4.4.7 and gcc 5.4. I would really appreciate if you could please shed light on
this. Thank you very much for your help in advance.
/*==================================================*/
cproto -D__extension__=" " -DCPROTO -S -f 2 -I. -I/home/XXX/include -o test.pl
test.c
"/usr/include/stdarg.h", line 40: syntax error at token '__builtin_va_list'
"/usr/include/libio.h", line 491: syntax error at token '__gnuc_va_list'
"/usr/include/stdio.h", line 197: syntax error at token '__asm__'
"/usr/include/stdio.h", line 282: syntax error at token '__filename'
......
"/usr/include/stdio.h", line 734: syntax error at token '__ptr'
"/usr/include/stdio.h", line 779: syntax error at token '__asm__'
"/usr/include/stdio.h", line 801: syntax error at token '__stream'
"/usr/include/stdio.h", line 803: syntax error at token '__asm__'
"/usr/include/stdlib.h", line 165: syntax error at token '__nptr'
......
"/usr/include/stdlib.h", line 210: syntax error at token '__nptr'
"/usr/include/stdlib.h", line 215: syntax error at token '__nptr'
"/usr/include/sys/select.h", line 109: syntax error at token '__readfds'
"/usr/include/stdlib.h", line 360: syntax error at token '__buf'
"/usr/include/stdlib.h", line 366: syntax error at token '__statebuf'
"/usr/include/stdlib.h", line 371: syntax error at token '__statebuf'
......
"/usr/include/string.h", line 44: syntax error at token '__dest'
"/usr/include/string.h", line 57: syntax error at token '__dest'
......
"/usr/include/fcntl.h", line 209: syntax error at token '__asm__'
"/usr/include/sys/stat.h", line 219: syntax error at token '__file'
"/usr/include/sys/stat.h", line 222: syntax error at token '__asm__'
"/usr/include/sys/stat.h", line 269: syntax error at token '__file'
"/usr/include/sys/stat.h", line 412: syntax error at token '__asm__'
"/usr/include/sys/stat.h", line 415: syntax error at token '__asm__'
"/usr/include/sys/stat.h", line 418: syntax error at token '__asm__'
"/usr/include/sys/stat.h", line 421: syntax error at token '__asm__'
gcc -g -c -m64 -gdwarf-2 -g -D__USE_XOPEN2K8 -std=gnu89 -DTPI_DEBUG -c -I.
-I/home/XXX/include ./test.c
......
/*==================================================*/
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Subject: [Bug c/90123] "/usr/include/string.h", line 44: syntax error at token '__dest'
Date: Wed, 17 Apr 2019 00:31:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
/usr/include/stdio.h comes from glibc.
cproto is the issue report it to them. I noticed cproto is no longer
maintained too.
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Subject: [Bug translation/90121] extra space in error message
Date: Wed, 17 Apr 2019 02:04:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |easyhack
CC| |egallager at gcc dot gnu.org
Blocks| |40883
Severity|normal |trivial
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40883
[Bug 40883] [meta-bug] Translation breakage with trivial fixes
>From gcc-bugs-return-640932-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 02:05:39 2019
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90120] inconsistent punctuation in translation messages
Date: Wed, 17 Apr 2019 02:05:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |easyhack
CC| |egallager at gcc dot gnu.org
Blocks| |40883
Severity|normal |trivial
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40883
[Bug 40883] [meta-bug] Translation breakage with trivial fixes
>From gcc-bugs-return-640933-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 02:09:48 2019
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Subject: [Bug target/79869] i18n: document placeholders for translators
Date: Wed, 17 Apr 2019 02:09:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |documentation
CC| |amylaar at gcc dot gnu.org,
| |andrew.burgess at embecosm dot com
| |, claziss at gmail dot com,
| |egallager at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Roland Illig from comment #1)
> ping? Two years later, and I still don't know how to translate this string
> into proper German.
cc-ing arc maintainers/reviewers
>From gcc-bugs-return-640934-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 02:18:42 2019
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Subject: [Bug translation/90119] Merge translation msgids that only differ in placeholders
Date: Wed, 17 Apr 2019 02:18:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
since this requests modifying the linter, I'm going to say this is more
difficult than just "trivial" and thus leave the importance as "normal"
(likewise with other translation bugs that request modifying the linter)
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Subject: [Bug testsuite/86153] [8 regression] test case g++.dg/pr83239.C fails starting with r261585
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bin cheng <amker at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #16 from bin cheng <amker at gcc dot gnu.org> ---
Should this be backported to GCC8?
>From gcc-bugs-return-640936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 03:50:35 2019
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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90124] New: [9 Regression] Compilation of llvm PDBContext.cpp fails.
Date: Wed, 17 Apr 2019 03:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90124
Bug ID: 90124
Summary: [9 Regression] Compilation of llvm PDBContext.cpp
fails.
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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Created attachment 46181
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46181&action=edit
unreduced PDBContext.ii
trunk GCC currently fails to build LLVM (7 branch at least ) with the
following:
/home/iains/gcc-trunk/install/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/cc1plus
-fpreprocessed PDBContext.ii -quiet -dumpbase PDBContext.cpp -mtune=generic
-march=x86-64 -auxbase-strip CMakeFiles/LLVMDebugInfoPDB.dir/PDBContext.cpp.o -
Os -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings
-Wcast-qual -Wno-missing-field-initializers -Wpedantic -Wno-long-long
-Wno-maybe-uninitialized -Wno-class-memaccess -Wdelete-non-virtual-dtor
-Wno-comment -std
=c++11 -version -fPIC -fvisibility-inlines-hidden -ffunction-sections
-fdata-sections -fno-exceptions -fno-rtti -o PDBContext.s
GNU C++11 (GCC) version 9.0.1 20190416 (experimental) [trunk revision 270376]
(x86_64-pc-linux-gnu)
compiled by GNU C version 9.0.1 20190416 (experimental) [trunk revision
270376], GMP version 6.1.2, MPFR version 3.1.5, MPC version 1.0.3, isl version
none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++11 (GCC) version 9.0.1 20190416 (experimental) [trunk revision 270376]
(x86_64-pc-linux-gnu)
compiled by GNU C version 9.0.1 20190416 (experimental) [trunk revision
270376], GMP version 6.1.2, MPFR version 3.1.5, MPC version 1.0.3, isl version
none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 4b7aa8ad0f9dc04e51fdc48d2596248f
In file included from
/home/iains/llvm-project/llvm/lib/DebugInfo/PDB/PDBContext.cpp:15:
/home/iains/llvm-project/llvm/include/llvm/DebugInfo/PDB/PDBSymbolData.h:32:36:
error: invalid use of incomplete type ‘const class llvm::pdb::PDBSymbolData’
32 | FORWARD_SYMBOL_METHOD(getAccess)
| ^
/home/iains/llvm-project/llvm/include/llvm/DebugInfo/PDB/PDBSymbolData.h:23:7:
note: definition of ‘class llvm::pdb::PDBSymbolData’ is not complete until the
closing brace
23 | class PDBSymbolData : public PDBSymbol {
| ^~~~~~~~~~~~~
/home/iains/llvm-project/llvm/include/llvm/DebugInfo/PDB/PDBSymbolData.h:32:36:
error: invalid use of incomplete type ‘const class llvm::pdb::PDBSymbolData’
32 | FORWARD_SYMBOL_METHOD(getAccess)
< many more like this>
8.3 works, and AFAIR trunk worked recently (order one or two months).
>From gcc-bugs-return-640938-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 03:55:55 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #78 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #77)
> (In reply to Iain Sandoe from comment #76)
> > (In reply to Jürgen Reuter from comment #75)
>
> > > LLVM does not compile, but I
> > > guess this is unrelated to the problem here:
> > > [ 38%] Building CXX object
> > > lib/DebugInfo/PDB/CMakeFiles/LLVMDebugInfoPDB.dir/PDBContext.cpp.o
> > > In file included from
> > > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > > IPDBSession.h:12,
> > > from
> > > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > > PDBContext.h:13,
> > > from
> > > /Users/reuter/local/packages/llvm-project/llvm/lib/DebugInfo/PDB/PDBContext.
> > > cpp:9:
> > > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > > PDBSymbol.h:20:37: error: invalid use of incomplete type 'const class
> > > llvm::pdb::PDBSymbolData'
> > > 20 | auto MethodName() const->decltype(RawSymbol->MethodName()) {
> > > \
> > > | ^~~~~~~~~
> > > /Users/reuter/local/packages/llvm-project/llvm/include/llvm/DebugInfo/PDB/
> > > PDBSymbolData.h:27:3: note: in expansion of macro 'FORWARD_SYMBOL_METHOD'
> > > 27 | FORWARD_SYMBOL_METHOD(getAccess)
> > > | ^~~~~~~~~~~~~~~~~~~~~
> >
> > This either a regression (since trunk GCC built LLVM ≈ 2 months ago) or it's
> > a new feature exposing some other bug in LLVM - either way, you are right,
> > it doesn't appear related to the current patch. I will attempt to see if
> > it's repeatable on Linux,
>
> Fails the same way on Linux - so, as noted, it's either a regression or an
> improved error detection for some other issue.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90124
>From gcc-bugs-return-640937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 03:55:00 2019
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
Date: Wed, 17 Apr 2019 03:55:00 -0000
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-apple-darwin*,
| |x86_64-pc-linux-gnu
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-17
Known to work| |8.3.0
Host| |x86_64-apple-darwin*,
| |x86_64-pc-linux-gnu
Ever confirmed|0 |1
Build| |x86_64-apple-darwin*,
| |x86_64-pc-linux-gnu
--- Comment #1 from Iain Sandoe <iains at gcc dot gnu.org> ---
(of course, the other explanation is that GCC is now detecting some error that
was previously missed, I haven't been able to spend any time analysing).
>From gcc-bugs-return-640939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 04:12:48 2019
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Subject: [Bug c++/86368] an unknown [[attribute]] should not trigger a warning in C++17
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Justin Bassett <jbassett271 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jbassett271 at gmail dot com
--- Comment #7 from Justin Bassett <jbassett271 at gmail dot com> ---
Currently, the unknown attribute warning means that we get a warning for typos
in a whitelisted set of attributes: the standardized attributes and the
gnu::attributes. If this set of whitelisted attributes could be extended, that
would be the ideal solution, IMO, since the user would also get typo detection
for their additional attributes.
Something like -Wignore-unknown-attribute=likely
-Wignore-unknown-attribute=some_ns::some_attribute .
----
Jonathan Wakely's suggestion is a decent solution to this problem. However, it
won't detect typos in user attributes, and it won't extend to future
standardized attributes.
Another idea is to warn if the edit-distance from the unknown attribute to a
known attribute is small. So [[noretrun]] has a small edit distance and could
emit a warning with, "Did you mean [[noreturn]]?" And
[[some_future_std_attribute]] would emit no warning because it has a large edit
distance from all known attributes.
>From gcc-bugs-return-640940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 05:06:39 2019
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Wed, 17 Apr 2019 05:06:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #8 from Jeffrey A. Law <law at redhat dot com> ---
So, if we change phionlycprop to look for other const/copy initializations that
can be eliminated and run a pass between DOM and the erroneous-path isolation
pass, then the false positive is eliminated (as expected).
There's two things I don't like about that. First, it turns phionlycprop into
a full-fledged constant propagation pass. phionlycprop is supposed to be so
fast that we never really notice it. It accomplishes this by only looking at
PHI nodes that are degenerates and any constants exposed by propagating way the
degenerate PHI. Essentially it's just cleaning up painfully obvious cruft left
by jump threading.
To pick up this case we'd have to scan statements in blocks. We could restrict
that to blocks where we eliminated degenerate PHI. But still. Ugh.
Second, once phionlycprop is doing more work, I'm less inclined to want to add
another instance of the pass.
Finally, once phionlycprop is doing more work one could legitimately ask if we
should just drop the code and use the lattice copy propagator.
Just for fun I replaced all the phi-only cprop calls with calls into the
lattice propagator (including the one I added between DOM and erroneous-path
optimization). As expected that fixes the testcase too. It also happens to
clean up things slightly better at an earlier point in the optimizer pipeline.
I don't know if it's a good trade-off though.
>From gcc-bugs-return-640941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 06:11:21 2019
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Subject: [Bug d/89432] FAIL: libphobos.unittests/druntime/{static,shared}/core.time on CentOS 5.11, Linux 2.6.18
Date: Wed, 17 Apr 2019 06:11:00 -0000
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--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 46182
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46182&action=edit
Proposed patch
Attached patch introduces DRUNTIME_OS_LINUX_PRE_2639 function that detects
linux version < 2.6.39 and sets LINUX_PRE_2639_FLAG. However, as shown in the
Comment #0, CentOS 5.11 (kernel 2.6.18) lacks several other clock types besides
CLOCK_BOOTTIME, so the patch does not fix the failure for these older kernels.
I doubt it is worth pushing this any further, so I'll just attach the patch
here for reference.
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
Date: Wed, 17 Apr 2019 06:16:00 -0000
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Jürgen Reuter <juergen.reuter at desy dot de> changed:
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----------------------------------------------------------------------------
CC| |juergen.reuter at desy dot de
--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
This happens not only for the git repo of LLVM, but also with their latest
release LLVM 8.0.
>From gcc-bugs-return-640943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 06:47:16 2019
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
Date: Wed, 17 Apr 2019 06:47:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Revision r270115 (2019-04-03) compiles the test without error, r270252
(2019-04-10) generates a lot of errors.
>From gcc-bugs-return-640944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:22:41 2019
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
Date: Wed, 17 Apr 2019 07:22:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46183
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46183&action=edit
32bit math.gox
Here it is. The 64bit one looks similar btw.
>From gcc-bugs-return-640945-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:31:31 2019
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, I just checked and the build also fails with glibc 2.22 in the same way.
Oddly enough it only fails in a controlled environment but not on a development
machine with the same glibc I do regular testing on. (controlled environment
aka package builds for SLES 12 based distros)
I configure with
../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man
--libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go,d
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--disable-werror --with-gxx-include-dir=/usr/include/c++/9 --enable-ssp
--disable-libssp --disable-libvtv --disable-cet --disable-libcc1
--disable-plugin --with-bugurl=https://bugs.opensuse.org/
'--with-pkgversion=SUSE Linux' --with-slibdir=/lib64 --with-system-zlib
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--with-default-libstdcxx-abi=gcc4-compatible --enable-libphobos
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-9 --without-system-libunwind --enable-multilib
--with-arch-32=x86-64 --with-tune=generic --build=x86_64-suse-linux
--host=x86_64-suse-linux
and build like
setarch x86_64 -R make profiledbootstrap 'STAGE1_CFLAGS=-g -O2'
'BOOT_CFLAGS=-fmessage-length=0 -grecord-gcc-switches -O2 -D_FORTIFY_SOURCE=2
-funwind-tables -fasynchronous-unwind-tables -g -U_FORTIFY_SOURCE' -j3
the build uses trunk as of r270275
>From gcc-bugs-return-640946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:34:11 2019
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Subject: [Bug c++/90108] ICE: Segmentation fault (in c_tree_chain_next)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46184
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gcc9-pr90108.patch
Untested fix.
>From gcc-bugs-return-640947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:42:18 2019
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Subject: [Bug tree-optimization/43565] Missed address comparison folding of DECL_COMMONs
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think implementation-wise GCC outrules aliases that are not visible but takes
care of symbols resolving to NULL. For optimizations of actual accesses it can
assume the symbols do not resolve to NULL since the accesses would trap. So
the question is whether we should follow suit and declare non-visible weak
declarations similarly undefined as non-visible alias declarations
(for externs and commons).
>From gcc-bugs-return-640949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:48:48 2019
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Subject: [Bug tree-optimization/90037] [9 Regression] -Wnull-dereference false positive after r269302
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #8)
> So, if we change phionlycprop to look for other const/copy initializations
> that can be eliminated and run a pass between DOM and the erroneous-path
> isolation pass, then the false positive is eliminated (as expected).
>
> There's two things I don't like about that. First, it turns phionlycprop
> into a full-fledged constant propagation pass. phionlycprop is supposed to
> be so fast that we never really notice it. It accomplishes this by only
> looking at PHI nodes that are degenerates and any constants exposed by
> propagating way the degenerate PHI. Essentially it's just cleaning up
> painfully obvious cruft left by jump threading.
>
> To pick up this case we'd have to scan statements in blocks. We could
> restrict that to blocks where we eliminated degenerate PHI. But still.
> Ugh.
>
> Second, once phionlycprop is doing more work, I'm less inclined to want to
> add another instance of the pass.
>
> Finally, once phionlycprop is doing more work one could legitimately ask if
> we should just drop the code and use the lattice copy propagator.
>
> Just for fun I replaced all the phi-only cprop calls with calls into the
> lattice propagator (including the one I added between DOM and erroneous-path
> optimization). As expected that fixes the testcase too. It also happens to
> clean up things slightly better at an earlier point in the optimizer
> pipeline. I don't know if it's a good trade-off though.
As a middle-ground you can now run non-iterating value-numbering on a
SEME region. We are already doing that for unrolled loop bodies,
if-converted loop bodies and loop header copies, exactly to (mostly) get
local constant propagation & simplifications done. IMHO the copied
paths jump threading creates are a perfect candidate for this treatment
as well. See for example tree-ssa-loop-ch.c where it calls do_rpo_vn
(obviously VN needs up-to-date SSA so the VN is delayed until after all
loop-header copying is done and we remember the SEME regions to VN).
>From gcc-bugs-return-640948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:48:48 2019
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Subject: [Bug translation/90117] Replace %<%s%> with %qs
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Makes sense, I'll integrate that to our linter.
>From gcc-bugs-return-640950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:52:03 2019
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Subject: [Bug c/82542] -fdump-lang-raw (formerly -fdump-translation-unit) no longer available for C
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Nathan, what does it take to re-instantiate -fdump-lang-raw for the C frontend?
>From gcc-bugs-return-640951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:52:33 2019
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Subject: [Bug debug/90109] gstabs flag generates wrong entry for long on x86_64
Date: Wed, 17 Apr 2019 07:52:00 -0000
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--- Comment #3 from nebiun at hotmail dot com ---
Sorry, but the bug is not related to the wrong dimension of a type, but to the
fact that the bitsize of the same type (K&R type: long, not long long or double
or a user type) is showed as 32 bit as typedef and 64 bit if used in a
structure.
>From gcc-bugs-return-640952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:53:53 2019
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Subject: [Bug translation/90121] extra space in error message
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>From gcc-bugs-return-640953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:54:58 2019
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Subject: [Bug translation/90118] Missing space between words
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for report, let me do it.
>From gcc-bugs-return-640954-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:55:06 2019
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Subject: [Bug translation/90117] Replace %<%s%> with %qs
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>From gcc-bugs-return-640955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:55:56 2019
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r270135, let me reduce that.
>From gcc-bugs-return-640956-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:58:44 2019
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Subject: [Bug translation/90121] extra space in error message
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>From gcc-bugs-return-640957-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 07:59:05 2019
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Subject: [Bug translation/90120] inconsistent punctuation in translation messages
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>From gcc-bugs-return-640958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 08:00:34 2019
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Subject: [Bug translation/90119] Merge translation msgids that only differ in placeholders
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Target Milestone|--- |9.0
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Also useful bug report, thanks for ideas!
>From gcc-bugs-return-640959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 08:00:50 2019
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Subject: [Bug debug/90109] gstabs flag generates wrong entry for long on x86_64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90109
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to nebiun from comment #3)
> Sorry, but the bug is not related to the wrong dimension of a type, but to
> the fact that the bitsize of the same type (K&R type: long, not long long or
> double or a user type) is showed as 32 bit as typedef and 64 bit if used in
> a structure.
Well, the typedef is "wrong" (but we can't do anything about that w/o
extensions) and the structure layout is "correct" (it seems we can
represent things there correctly).
What would be nice is to somehow not emit the bogus typedef but sth
that wouldn't show this mismatch. But I get that stabs doesn't have
a way to do this.
That said, dbxout.c might want to issue a warning if we emit "bogus"
stabs and suggest to use -gstabs+.
But I agree, you shouldn't use stabs. It's not maintained, the world
has moved on to dwarf (and I more than once argued to remove stabs support
from GCC).
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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90125] New: Typo of AVX512 intrinsics
Date: Wed, 17 Apr 2019 08:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90125
Bug ID: 90125
Summary: Typo of AVX512 intrinsics
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: crazylht at gmail dot com
CC: jakub at redhat dot com
Target Milestone: ---
for intrinsics _mm_maskz_f[n,]m[add,sub]_round_s[sd],
I think it should be
1 file changed, 8 insertions(+), 8 deletions(-)
gcc/config/i386/avx512fintrin.h | 16 ++++++++--------
modified gcc/config/i386/avx512fintrin.h
@@ -12104,10 +12104,10 @@ _mm_maskz_fnmsub_round_ss (__mmask8 __U, __m128 __W,
__m128 __A, __m128 __B,
(__m128) __builtin_ia32_vfmaddss3_mask3 (A, B, C, U, R)
#define _mm_maskz_fmadd_round_sd(U, A, B, C, R) \
- (__m128d) __builtin_ia32_vfmaddsd3_mask3 (A, B, C, U, R)
+ (__m128d) __builtin_ia32_vfmaddsd3_maskz (A, B, C, U, R)
#define _mm_maskz_fmadd_round_ss(U, A, B, C, R) \
- (__m128) __builtin_ia32_vfmaddss3_mask3 (A, B, C, U, R)
+ (__m128) __builtin_ia32_vfmaddss3_maskz (A, B, C, U, R)
#define _mm_mask_fmsub_round_sd(A, U, B, C, R) \
(__m128d) __builtin_ia32_vfmaddsd3_mask (A, B, -(C), U, R)
@@ -12122,10 +12122,10 @@ _mm_maskz_fnmsub_round_ss (__mmask8 __U, __m128 __W,
__m128 __A, __m128 __B,
(__m128) __builtin_ia32_vfmsubss3_mask3 (A, B, C, U, R)
#define _mm_maskz_fmsub_round_sd(U, A, B, C, R) \
- (__m128d) __builtin_ia32_vfmaddsd3_mask3 (A, B, -(C), U, R)
+ (__m128d) __builtin_ia32_vfmaddsd3_maskz (A, B, -(C), U, R)
#define _mm_maskz_fmsub_round_ss(U, A, B, C, R) \
- (__m128) __builtin_ia32_vfmaddss3_mask3 (A, B, -(C), U, R)
+ (__m128) __builtin_ia32_vfmaddss3_maskz (A, B, -(C), U, R)
#define _mm_mask_fnmadd_round_sd(A, U, B, C, R) \
(__m128d) __builtin_ia32_vfmaddsd3_mask (A, -(B), C, U, R)
@@ -12140,10 +12140,10 @@ _mm_maskz_fnmsub_round_ss (__mmask8 __U, __m128 __W,
__m128 __A, __m128 __B,
(__m128) __builtin_ia32_vfmaddss3_mask3 (A, -(B), C, U, R)
#define _mm_maskz_fnmadd_round_sd(U, A, B, C, R) \
- (__m128d) __builtin_ia32_vfmaddsd3_mask3 (A, -(B), C, U, R)
+ (__m128d) __builtin_ia32_vfmaddsd3_maskz (A, -(B), C, U, R)
#define _mm_maskz_fnmadd_round_ss(U, A, B, C, R) \
- (__m128) __builtin_ia32_vfmaddss3_mask3 (A, -(B), C, U, R)
+ (__m128) __builtin_ia32_vfmaddss3_maskz (A, -(B), C, U, R)
#define _mm_mask_fnmsub_round_sd(A, U, B, C, R) \
(__m128d) __builtin_ia32_vfmaddsd3_mask (A, -(B), -(C), U, R)
@@ -12158,10 +12158,10 @@ _mm_maskz_fnmsub_round_ss (__mmask8 __U, __m128 __W,
__m128 __A, __m128 __B,
(__m128) __builtin_ia32_vfmsubss3_mask3 (A, -(B), C, U, R)
#define _mm_maskz_fnmsub_round_sd(U, A, B, C, R) \
- (__m128d) __builtin_ia32_vfmaddsd3_mask3 (A, -(B), -(C), U, R)
+ (__m128d) __builtin_ia32_vfmaddsd3_maskz (A, -(B), -(C), U, R)
#define _mm_maskz_fnmsub_round_ss(U, A, B, C, R) \
- (__m128) __builtin_ia32_vfmaddss3_mask3 (A, -(B), -(C), U, R)
+ (__m128) __builtin_ia32_vfmaddss3_maskz (A, -(B), -(C), U, R)
#endif
jakub, is it correct?
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Subject: [Bug c/90125] Typo of AVX512 intrinsics
Date: Wed, 17 Apr 2019 08:08:00 -0000
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--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
Last time I add runtime tests for -O2, didn't cover this part which use -O0.
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Priority|P3 |P1
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #51 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 17 08:30:44 2019
New Revision: 270404
URL: https://gcc.gnu.org/viewcvs?rev=270404&root=gcc&view=rev
Log:
PR target/89093
* config/arm/arm.c (arm_valid_target_attribute_rec): Don't skip
whitespace at the start of target attribute string.
* gcc.target/arm/pr89093-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/arm/pr89093-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|needs-reduction |
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
$ cat pr90124.ii
class a {
public:
int b;
};
class c : a {
auto m_fn1() -> decltype(b);
};
$ g++ pr90124.ii -c -fmax-errors=1 -Werror
pr90124.ii:6:28: error: invalid use of incomplete type ‘class c’
6 | auto m_fn1() -> decltype(b);
| ^
pr90124.ii:5:7: note: definition of ‘class c’ is not complete until the closing
brace
5 | class c : a {
| ^
$ g++-8 pr90124.ii -c -fmax-errors=1 -Werror
[OK]
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Subject: [Bug fortran/90048] Fortran OpenACC 'private' clause rejected for predetermined private loop iteration variable
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--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Wed Apr 17 08:34:20 2019
New Revision: 270406
URL: https://gcc.gnu.org/viewcvs?rev=270406&root=gcc&view=rev
Log:
[PR90048] Fortran OpenACC 'private' clause rejected for predetermined private
loop iteration variable
gcc/fortran/
PR fortran/90048
* openmp.c (gfc_resolve_do_iterator): Handle sharing_clauses for
OpenACC, too.
(gfc_resolve_oacc_blocks): Populate sharing_clauses with private
clauses.
gcc/testsuite/
PR fortran/90048
* gfortran.dg/goacc/private-explicit-kernels-1.f95: New file.
* gfortran.dg/goacc/private-explicit-parallel-1.f95: Likewise.
* gfortran.dg/goacc/private-explicit-routine-1.f95: Likewise.
Added:
trunk/gcc/testsuite/gfortran.dg/goacc/private-explicit-kernels-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-explicit-parallel-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-explicit-routine-1.f95
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/openmp.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/90067] Loop variables in Fortran 'do' statements within a compute construct must be predetermined private
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90067
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Wed Apr 17 08:34:10 2019
New Revision: 270405
URL: https://gcc.gnu.org/viewcvs?rev=270405&root=gcc&view=rev
Log:
[PR90067, PR90114] Document Fortran OpenACC predetermined private status quo
gcc/testsuite/
PR fortran/90067
PR fortran/90114
* gfortran.dg/goacc/private-1.f95: Remove file.
* gfortran.dg/goacc/private-2.f95: Likewise.
* gfortran.dg/goacc/private-predetermined-kernels-1.f95: New file.
* gfortran.dg/goacc/private-predetermined-parallel-1.f95:
Likewise.
* gfortran.dg/goacc/private-predetermined-routine-1.f95: Likewise.
Added:
trunk/gcc/testsuite/gfortran.dg/goacc/private-predetermined-kernels-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-predetermined-parallel-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-predetermined-routine-1.f95
Removed:
trunk/gcc/testsuite/gfortran.dg/goacc/private-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-2.f95
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/90114] Predetermined private levels for variables declared in OpenACC accelerator routines
Date: Wed, 17 Apr 2019 08:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90114
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Wed Apr 17 08:34:10 2019
New Revision: 270405
URL: https://gcc.gnu.org/viewcvs?rev=270405&root=gcc&view=rev
Log:
[PR90067, PR90114] Document Fortran OpenACC predetermined private status quo
gcc/testsuite/
PR fortran/90067
PR fortran/90114
* gfortran.dg/goacc/private-1.f95: Remove file.
* gfortran.dg/goacc/private-2.f95: Likewise.
* gfortran.dg/goacc/private-predetermined-kernels-1.f95: New file.
* gfortran.dg/goacc/private-predetermined-parallel-1.f95:
Likewise.
* gfortran.dg/goacc/private-predetermined-routine-1.f95: Likewise.
Added:
trunk/gcc/testsuite/gfortran.dg/goacc/private-predetermined-kernels-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-predetermined-parallel-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-predetermined-routine-1.f95
Removed:
trunk/gcc/testsuite/gfortran.dg/goacc/private-1.f95
trunk/gcc/testsuite/gfortran.dg/goacc/private-2.f95
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Wed, 17 Apr 2019 08:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85164
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
For the 2 test-cases we reach these backtraces:
$ ./xgcc -B. test.c -O1
../../gcc/poly-int.h:1941:12: runtime error: negation of -9223372036854775808
cannot be represented in type 'long int'; cast to an unsigned type to negate
this value to itself
#0 0xc8bbdc in poly_result<poly_int_traits<long>::coeff_type,
poly_int_traits<long>::coeff_type,
poly_coeff_pair_traits<poly_int_traits<long>::coeff_type,
poly_int_traits<long>::coeff_type>::result_kind>::type known_alignment<1u,
long>(poly_int_pod<1u, long> const&) ../../gcc/poly-int.h:1941
#1 0x3db9fdd in force_int_to_mode ../../gcc/combine.c:8949
#2 0x3db8c5b in force_to_mode ../../gcc/combine.c:8802
#3 0x3da45a8 in simplify_set ../../gcc/combine.c:6876
#4 0x3d9f16d in combine_simplify_rtx ../../gcc/combine.c:6456
#5 0x3d96712 in subst ../../gcc/combine.c:5727
#6 0x3d950fa in subst ../../gcc/combine.c:5590
#7 0x3d7ead4 in try_combine ../../gcc/combine.c:3420
#8 0x3d6e699 in combine_instructions ../../gcc/combine.c:1306
#9 0x3df4563 in rest_of_handle_combine ../../gcc/combine.c:15076
#10 0x3df4702 in execute ../../gcc/combine.c:15121
#11 0x1baf287 in execute_one_pass(opt_pass*) ../../gcc/passes.c:2487
#12 0x1bafb1d in execute_pass_list_1 ../../gcc/passes.c:2573
#13 0x1bafbd2 in execute_pass_list_1 ../../gcc/passes.c:2574
#14 0x1bafc71 in execute_pass_list(function*, opt_pass*)
../../gcc/passes.c:2584
#15 0xe52f0c in cgraph_node::expand() ../../gcc/cgraphunit.c:2198
#16 0xe544d3 in expand_all_functions ../../gcc/cgraphunit.c:2336
#17 0xe56b42 in symbol_table::compile() ../../gcc/cgraphunit.c:2687
#18 0xe575a8 in symbol_table::finalize_compilation_unit()
../../gcc/cgraphunit.c:2865
#19 0x2006fad in compile_file ../../gcc/toplev.c:481
#20 0x200ea9b in do_compile ../../gcc/toplev.c:2205
#21 0x200f0c9 in toplev::main(int, char**) ../../gcc/toplev.c:2340
#22 0x438f452 in main ../../gcc/main.c:39
#23 0x7ffff6e80b7a in __libc_start_main ../csu/libc-start.c:308
#24 0x85f579 in _start
(/home/marxin/Programming/gcc2/objdir/gcc/cc1+0x85f579)
and
../../gcc/poly-int.h:845:5: runtime error: signed integer overflow:
9223372036854775804 + 4 cannot be represented in type 'long int'
#0 0xc088f7 in poly_int<1u, poly_result<long, long,
poly_coeff_pair_traits<long, long>::result_kind>::type> operator+<1u, long,
long>(poly_int_pod<1u, long> const&, poly_int_pod<1u, long> const&)
../../gcc/poly-int.h:845
#1 0x1e2e0f2 in rtx_addr_can_trap_p_1 ../../gcc/rtlanal.c:524
#2 0x1e2ef7d in rtx_addr_can_trap_p_1 ../../gcc/rtlanal.c:659
#3 0x1e2ec71 in rtx_addr_can_trap_p_1 ../../gcc/rtlanal.c:645
#4 0x1e3e6fc in may_trap_p_1(rtx_def const*, unsigned int)
../../gcc/rtlanal.c:2836
#5 0x1e3fc4c in may_trap_p_1(rtx_def const*, unsigned int)
../../gcc/rtlanal.c:2937
#6 0x1e3fedf in may_trap_p(rtx_def const*) ../../gcc/rtlanal.c:2956
#7 0x1cefd4b in copyprop_hardreg_forward_1 ../../gcc/regcprop.c:804
#8 0x1cf6191 in cprop_hardreg_bb ../../gcc/regcprop.c:1320
#9 0x1cf6da4 in execute ../../gcc/regcprop.c:1385
#10 0x1baf287 in execute_one_pass(opt_pass*) ../../gcc/passes.c:2487
#11 0x1bafb1d in execute_pass_list_1 ../../gcc/passes.c:2573
#12 0x1bafbd2 in execute_pass_list_1 ../../gcc/passes.c:2574
#13 0x1bafbd2 in execute_pass_list_1 ../../gcc/passes.c:2574
#14 0x1bafc71 in execute_pass_list(function*, opt_pass*)
../../gcc/passes.c:2584
#15 0xe52f0c in cgraph_node::expand() ../../gcc/cgraphunit.c:2198
#16 0xe544d3 in expand_all_functions ../../gcc/cgraphunit.c:2336
#17 0xe56b42 in symbol_table::compile() ../../gcc/cgraphunit.c:2687
#18 0xe575a8 in symbol_table::finalize_compilation_unit()
../../gcc/cgraphunit.c:2865
#19 0x2006fad in compile_file ../../gcc/toplev.c:481
#20 0x200ea9b in do_compile ../../gcc/toplev.c:2205
#21 0x200f0c9 in toplev::main(int, char**) ../../gcc/toplev.c:2340
#22 0x438f452 in main ../../gcc/main.c:39
#23 0x7ffff6e80b7a in __libc_start_main ../csu/libc-start.c:308
#24 0x85f579 in _start
(/home/marxin/Programming/gcc2/objdir/gcc/cc1+0x85f579)
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Subject: [Bug tree-optimization/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Wed, 17 Apr 2019 08:41:00 -0000
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Jeff posted this to PR 89819 instead of here:
Somewhat trimmed down testcase... Certainly easier to analyze...
typedef __SIZE_TYPE__ size_t;
typedef unsigned long int uintmax_t;
struct group
{
char *gr_name;
char *gr_passwd;
unsigned gr_gid;
char **gr_mem;
};
struct passwd
{
char *pw_name;
char *pw_passwd;
unsigned pw_uid;
unsigned pw_gid;
char *pw_gecos;
char *pw_dir;
char *pw_shell;
};
extern struct group *getgrnam (const char *);
extern struct group *getgrgid (unsigned);
extern void endgrent (void);
extern struct passwd *getpwnam (const char *);
extern void endpwent (void);
extern unsigned long int strtoul (const char *__restrict,
char **__restrict, int);
char const *
parse_with_separator (char const *spec, char const *separator,
unsigned *uid, unsigned *gid,
char **username, char **groupname)
{
static const char *E_bad_spec = "invalid spec";
const char *error_msg;
char *u;
char const *g;
struct group *grp;
unsigned unum = *uid;
error_msg = 0;
u = 0;
if (separator == 0)
u = __builtin_strdup (spec);
size_t ulen = separator - spec;
u = __builtin_malloc (ulen + 1);
g = (separator == 0 || *(separator + 1) == '\0' ? 0 : separator + 1);
if (u != 0)
{
_Bool use_login_group = (separator != 0 && g == 0);
if (use_login_group)
error_msg = E_bad_spec;
endpwent ();
}
if (g != 0 && error_msg == 0)
grp = (*g == '+' ? 0 : getgrnam (g));
if (error_msg == 0)
*uid = unum;
return 0;
}
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From: "stanislav at froglogic dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90126] New: gcc can not correctly deal with its own preprocessed output
Date: Wed, 17 Apr 2019 08:46:00 -0000
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Bug ID: 90126
Summary: gcc can not correctly deal with its own preprocessed
output
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: stanislav at froglogic dot com
Target Milestone: ---
Created attachment 46185
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46185&action=edit
attachment is a .cpp (de facto an .ii) file of a minimized case for which the
problem occurs
The result of g++ -v:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-3'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.3.0 (Debian 8.3.0-3)
Command line which causes the problem:
g++ temp_namespace_anonymous.cpp
RESULT OF THE CALL:
namespace_anonymous_1_min_ok.cpp:14:8: warning: ‘Node’ has a field
‘Node::receiverQueue’ whose type uses the anonymous namespace
[-Wsubobject-linkage]
struct Node
File temp_namespace_anonymous.cpp is generated as follows:
g++ -E namespace_anonymous_1_min_ok.cpp > temp_namespace_anonymous.cpp
HOWEVER output of
g++ namespace_anonymous_1_min_ok.cpp
is OK
You will find file
namespace_anonymous_1_min_ok.cpp
(which can also be considered as .ii file)
attached to this report.
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
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--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
@Nikolay:
As discussed in https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00416.html email
thread, we reached the following consensus with H.J:
- As any AVX512 extensions (apart from AVX512F) can be enabled individually,
it's difficult to come up with priorities in dispatcher.
- We don't have a syntax for target_clone attribute where one would say e.g.
avx512f+avx512cd+avx512er.
- So that we would reject these (AVX512* except AVX512F) in target_clone
attribute and we recommend to use rather.
target_clones(arch=skylake,arch=skylake-avx512,arch=cannonlake,arch=icelake-client,arch=icelake-server,
..)
- Using that one can cover used AVX512 ISA combinations for existing CPUs
Does it work for you Nikolay?
>From gcc-bugs-return-640972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 08:49:38 2019
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Subject: [Bug c++/86368] an unknown [[attribute]] should not trigger a warning in C++17
Date: Wed, 17 Apr 2019 08:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86368
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Justin Bassett from comment #7)
> and it won't extend to future standardized attributes.
That's a Good Thing. If I use a new standardized attribute like
[[no_unique_address]] I definitely want to know if the compiler doesn't
recognize it, because that affects the ABI of my code.
>From gcc-bugs-return-640973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 08:57:57 2019
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From: "JunMa at linux dot alibaba.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/90106] builtin sqrt() ignoring libm's sqrt call result
Date: Wed, 17 Apr 2019 08:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90106
JunMa <JunMa at linux dot alibaba.com> changed:
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----------------------------------------------------------------------------
CC| |JunMa at linux dot alibaba.com
--- Comment #7 from JunMa <JunMa at linux dot alibaba.com> ---
yes, the transformation in CDEC prevent the tail call optimization. let's check
the return stmt in CDEC pass.
>From gcc-bugs-return-640974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:06:11 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug web/90127] New: Disable bugzilla [[wiki_links]] and don't confuse rNN register names with rNNNNN svn revisions
Date: Wed, 17 Apr 2019 09:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90127
Bug ID: 90127
Summary: Disable bugzilla [[wiki_links]] and don't confuse rNN
register names with rNNNNN svn revisions
Product: gcc
Version: unknown
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Currently [[this_text]] will link to https://gcc.gnu.org/wiki/this_text which
is distracting when trying to talk about C++11-style attributes such as
[[noreturn]] and [[fallthrough]] e.g. see
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86368
Either we should pick another syntax for wiki links, or just disable it. I
don't think anybody uses it.
Secondly, the shortcuts for svn revisions like r12345 also match register names
like r1, r12, r123 and that's also distracting. I suggest that it should only
link to an svn revision for 4 or more digits. GCC supports targets that have
register names with three digits, and I doubt there's any need to link to the
first 999 svn revisions.
>From gcc-bugs-return-640976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:08:20 2019
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Subject: [Bug debug/86964] [7/8 Regression] Too many debug symbols included, especially for extern globals
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |peadar at arista dot com
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 81135 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-640975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:08:19 2019
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Subject: [Bug debug/81135] Extra debug info generated for unused extern declarations
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 86964 ***
>From gcc-bugs-return-640977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:18:15 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65752] Too strong optimizations int -> pointer casts
Date: Wed, 17 Apr 2019 09:18:00 -0000
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--- Comment #57 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #56)
> Testcase from PR82177:
>
> #include <stdio.h>
> #include <stdint.h>
>
> void f(int*, int*);
>
> int main()
> {
> int a=0, y[1], x = 0;
> uintptr_t pi = (uintptr_t) &x;
> uintptr_t yi = (uintptr_t) (y+1);
> uintptr_t n = pi != yi;
>
> if (n) {
> a = 100;
> pi = yi;
> }
>
> if (n) {
> a = 100;
> pi = (uintptr_t) y;
> }
>
> *(int *)pi = 15;
>
> printf("a=%d x=%d\n", a, x);
>
> f(&x,y);
>
> return 0;
> }
With the C provenance proposal this example is undefined since 'a' is not
exposed (it's address is not converted to an integer). The testcase
also relies on preserving the order of the variables on the stack.
>From gcc-bugs-return-640979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:23:53 2019
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88136] -Wdeprecated-copy is draconian and shouldn't be in -Wall
Date: Wed, 17 Apr 2019 09:23:00 -0000
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--- Comment #6 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Any chance of moving this warning out of -Wextra and re-considering adding it
there for GCC 10?
>From gcc-bugs-return-640978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:23:45 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/65752] Too strong optimizations int -> pointer casts
Date: Wed, 17 Apr 2019 09:23:00 -0000
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--- Comment #58 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #49)
> Related testcase from PR61502:
>
> #include <stdio.h>
>
> int main()
> {
> int x, y = 1;
> int *volatile v;
> int *p;
>
> v = &y;
> p = v;
> if (p == &x + 1) {
> *p = 2;
> printf("y = %d\n", y);
> }
> }
>
> which shows how propagating conditional equivalences (&x+1 into *p = 2)
> breaks
> alias analysis.
We now optimize the comparison to false via ptrs_compare_unequal given
&x + 1 has provenance &x and p has provenance &y. Thus we decided to
ignore that sub-sentence of the standard that seems to allow comparing
such pointers. So we behave as-if we'd put at least one byte of padding
after each object.
>From gcc-bugs-return-640980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:25:09 2019
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/88136] -Wdeprecated-copy is draconian and shouldn't be in -Wall
Date: Wed, 17 Apr 2019 09:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88136
--- Comment #7 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Innocent users are going to hit it: https://bugreports.qt.io/browse/QTBUG-75210
>From gcc-bugs-return-640981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:28:06 2019
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Subject: [Bug c++/90126] gcc can not correctly deal with its own preprocessed output
Date: Wed, 17 Apr 2019 09:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90126
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think this is a bug.
If you tell gcc that the preprocessed output is preprocessed output, then the
behaviour is consistent. So either:
g++ -E namespace_anonymous_1_min_ok.cpp > temp_namespace_anonymous.ii
g++ temp_namespace_anonymous.ii
Or:
g++ -E namespace_anonymous_1_min_ok.cpp > temp_namespace_anonymous.cpp
g++ -x c++-cpp-output temp_namespace_anonymous.cpp
The warning is suppressed when the type is defined in the "main input context"
i.e. not in a header file. When you treat the preprocessed output as
unpreprocessed source you end up with two sets of line markers, which makes GCC
think the type is defined in a header.
If you want to use preprocessed output this way you should probably generate it
without line markers:
g++ -E -P namespace_anonymous_1_min_ok.cpp > temp_namespace_anonymous.cpp
g++ temp_namespace_anonymous.cpp
>From gcc-bugs-return-640982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:28:57 2019
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Subject: [Bug c++/90126] gcc can not correctly deal with its own preprocessed output
Date: Wed, 17 Apr 2019 09:28:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
tl;dr the preprocessor should only be used once. You're running it twice on the
same input.
>From gcc-bugs-return-640983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:32:42 2019
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Subject: [Bug c++/90126] gcc can not correctly deal with its own preprocessed output
Date: Wed, 17 Apr 2019 09:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. I think this is odd behavior of the warning (not sure what it is
about). Note you get no warning when you pass -fpreprocessed. The key
to the diagnostic is that the anonymous namespace appears in a file
(through a #line directive) that is not the same as the file compiled.
Thus, the following testcase warns:
# 1 "t.C"
namespace {
struct Receiver { int object; };
}
struct Node
{
Receiver receiverQueue;
Node() { }
};
int main(int argc, char* argv[]) { return 0; }
> g++ t2.C
note to put the testcase into a file named t2.C, it doesn't warn when
the filename is t.C. This is because the warning intends to warn about
anonymous namespaces in headers which, when included from multiple sources
may cause issues.
So I think this behaves as intended and you need to compile preprocessed
source with -fpreprocessed (or use t2.ii filenames) or retain the original
filename. Or disable this particular warning.
>From gcc-bugs-return-640984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:36:10 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 17 Apr 2019 09:36:00 -0000
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--- Comment #52 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
I digged a bit, and found a D syntax for the target attribute,
it is a bit of a complication since D does not have a pre-processor,
but an empty target attribute does seem to be ignored without warnings.
--- libphobos/libdruntime/gcc/deh.d 2019-01-01 13:31:55.000000000 +0100
+++ libphobos/libdruntime/gcc/deh.d 2019-04-17 11:24:24.171579381 +0200
@@ -28,6 +28,7 @@ import gcc.unwind;
import gcc.unwind.pe;
import gcc.builtins;
import gcc.config;
+import gcc.attribute;
extern(C)
{
@@ -519,10 +520,19 @@ extern(C) void _d_throw(Throwable object
terminate("unwind error", __LINE__);
}
+static if (GNU_ARM_EABI_Unwinder)
+{
+ enum TARGET_ATTRIBUTE = "general-regs-only";
+}
+else
+{
+ enum TARGET_ATTRIBUTE = "";
+}
/**
* Read and extract information from the LSDA (.gcc_except_table section).
*/
+@attribute("target", (TARGET_ATTRIBUTE))
_Unwind_Reason_Code scanLSDA(const(ubyte)* lsda, _Unwind_Exception_Class
exceptionClass,
_Unwind_Action actions, _Unwind_Exception*
unwindHeader,
_Unwind_Context* context, _Unwind_Word cfa,
@@ -772,6 +782,7 @@ int actionTableLookup(_Unwind_Action act
* Called when the personality function has found neither a cleanup or
handler.
* To support ARM EABI personality routines, that must also unwind the stack.
*/
+@attribute("target", (TARGET_ATTRIBUTE))
_Unwind_Reason_Code CONTINUE_UNWINDING(_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
{
static if (GNU_ARM_EABI_Unwinder)
@@ -814,6 +825,7 @@ else
static if (GNU_ARM_EABI_Unwinder)
{
pragma(mangle, PERSONALITY_FUNCTION)
+ @attribute("target", (TARGET_ATTRIBUTE))
extern(C) _Unwind_Reason_Code gdc_personality(_Unwind_State state,
_Unwind_Exception*
unwindHeader,
_Unwind_Context* context)
@@ -873,6 +885,7 @@ else
}
}
+@attribute("target", (TARGET_ATTRIBUTE))
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
>From gcc-bugs-return-640985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:41:00 2019
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
Date: Wed, 17 Apr 2019 09:40:00 -0000
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--- Comment #53 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I'd vote for marking this fixed (and asking anyone with other ideas what could
be improved in generic tuning to open a new bug).
>From gcc-bugs-return-640986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:46:35 2019
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Subject: [Bug target/17108] Store with update not generated for a simple loop
Date: Wed, 17 Apr 2019 09:46:00 -0000
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Wed Apr 17 09:45:57 2019
New Revision: 270407
URL: https://gcc.gnu.org/viewcvs?rev=270407&root=gcc&view=rev
Log:
rs6000: Improve the load/store-with-update patterns (PR17108)
Many of these patterns only worked in 32-bit mode, and some only worked
in 64-bit mode. This patch makes these use Pmode, fixing the PR. On
the other hand, the stack updates have to use the same mode for the
stack pointer as for the value stored, so let's simplify that a bit.
Many of these patterns pass the wrong mode to
avoiding_indexed_address_p (it should be the mode of the datum
accessed, not the mode of the pointer).
Finally, I merge some patterns into one (using iterators).
PR target/17108
* config/rs6000/rs6000.c (rs6000_split_multireg_move): Adjust pattern
name.
(rs6000_emit_allocate_stack_1): Simplify condition. Adjust pattern
name.
* config/rs6000/rs6000.md (bits): Add entries for SF and DF.
(*movdi_update1): Use Pmode.
(movdi_<mode>_update): Fix argument to avoiding_indexed_address_p.
(movdi_<mode>_update_stack): Rename to ...
(movdi_update_stack): ... this. Fix comment. Change condition. Don't
use Pmode.
(*movsi_update1): Use Pmode.
(*movsi_update2): Use Pmode.
(movsi_update): Rename to ...
(movsi_<mode>_update): ... this. Use Pmode.
(movsi_update_stack): Fix condition.
(*movhi_update1): Use Pmode. Fix argument to
avoiding_indexed_address_p.
(*movhi_update2): Ditto.
(*movhi_update3): Ditto.
(*movhi_update4): Ditto.
(*movqi_update1): Ditto.
(*movqi_update2): Ditto.
(*movqi_update3): Ditto.
(*movsf_update1, *movdf_update1): Merge, rename to...
(*mov<mode>_update1): This. Use Pmode. Fix argument to
avoiding_indexed_address_p. Add "size" attribute.
(*movsf_update2, *movdf_update2): Merge, rename to...
(*mov<mode>_update2): This. Ditto.
(*movsf_update3): Use Pmode. Fix argument to
avoiding_indexed_address_p.
(*movsf_update4): Ditto.
(allocate_stack): Simplify condition. Adjust pattern names.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/config/rs6000/rs6000.md
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89093
--- Comment #53 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #52)
> I digged a bit, and found a D syntax for the target attribute,
> it is a bit of a complication since D does not have a pre-processor,
> but an empty target attribute does seem to be ignored without warnings.
>
>
> --- libphobos/libdruntime/gcc/deh.d 2019-01-01 13:31:55.000000000 +0100
> +++ libphobos/libdruntime/gcc/deh.d 2019-04-17 11:24:24.171579381 +0200
> @@ -28,6 +28,7 @@ import gcc.unwind;
> import gcc.unwind.pe;
> import gcc.builtins;
> import gcc.config;
> +import gcc.attribute;
>
> extern(C)
> {
> @@ -519,10 +520,19 @@ extern(C) void _d_throw(Throwable object
> terminate("unwind error", __LINE__);
> }
>
> +static if (GNU_ARM_EABI_Unwinder)
> +{
> + enum TARGET_ATTRIBUTE = "general-regs-only";
> +}
> +else
> +{
> + enum TARGET_ATTRIBUTE = "";
> +}
>
> /**
> * Read and extract information from the LSDA (.gcc_except_table section).
> */
> +@attribute("target", (TARGET_ATTRIBUTE))
> _Unwind_Reason_Code scanLSDA(const(ubyte)* lsda, _Unwind_Exception_Class
> exceptionClass,
> _Unwind_Action actions, _Unwind_Exception*
> unwindHeader,
> _Unwind_Context* context, _Unwind_Word cfa,
> @@ -772,6 +782,7 @@ int actionTableLookup(_Unwind_Action act
> * Called when the personality function has found neither a cleanup or
> handler.
> * To support ARM EABI personality routines, that must also unwind the
> stack.
> */
> +@attribute("target", (TARGET_ATTRIBUTE))
> _Unwind_Reason_Code CONTINUE_UNWINDING(_Unwind_Exception* unwindHeader,
> _Unwind_Context* context)
> {
> static if (GNU_ARM_EABI_Unwinder)
> @@ -814,6 +825,7 @@ else
> static if (GNU_ARM_EABI_Unwinder)
> {
> pragma(mangle, PERSONALITY_FUNCTION)
> + @attribute("target", (TARGET_ATTRIBUTE))
> extern(C) _Unwind_Reason_Code gdc_personality(_Unwind_State state,
> _Unwind_Exception*
> unwindHeader,
> _Unwind_Context* context)
> @@ -873,6 +885,7 @@ else
> }
> }
>
> +@attribute("target", (TARGET_ATTRIBUTE))
> private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
> _Unwind_Exception_Class
> exceptionClass,
> _Unwind_Exception*
> unwindHeader,
That is not going to work I'm afraid, many targets don't support target
attribute at all.
default_target_option_valid_attribute_p
will then just complain.
Only i386, rs6000, s390, arm, aarch64 and nios2 backends do support those.
On the other side, given the above, I thought all you want to ensure is that
the attribute is on the personality routine, not on the other ones, and the
gdc_personality definition is in
static if (GNU_ARM_EABI_Unwinder)
{
pragma(mangle, PERSONALITY_FUNCTION)
extern(C) _Unwind_Reason_Code gdc_personality(_Unwind_State state,
so can't you just stick @attribute("target", "general-regs-only") to there?
>From gcc-bugs-return-640988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 09:58:32 2019
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Subject: [Bug target/90125] Typo of AVX512 intrinsics
Date: Wed, 17 Apr 2019 09:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90125
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46186
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46186&action=edit
gcc9-pr90125.patch
Oops, you're right, thanks for noticing.
Here is a full patch including testcases that FAIL without the header patch and
succeed with that. Two tests failed, because the tests rely on actually using
fma and at -O0 for the C code fma is not used and so there is a small
difference, I've just tweaked constants so that it passes regardless.
>From gcc-bugs-return-640989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:02:47 2019
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/87763] [9 Regression] aarch64 target testcases fail after r265398
Date: Wed, 17 Apr 2019 10:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87763
--- Comment #54 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #53)
> Realistically the register allocation issues are not going to get addressed
> this cycle nor are improvements to the overall handling of RMW insns in
> combine. So we're going to be stuck with bandaids.
>
> I've got an updated backend pattern that should address the remainder of the
> insv_1 and insv_2 regressions and Steve has a backend pattern to address the
> other regression in this BZ.
I'd prefer not to add quick hacks that aren't beneficial in the long term.
Adding a very general pattern to handle any bitfield insert of any constant
would be much more useful. There is no issue with xfailing these tests -
neither insv pattern was used frequently so the regression for these is not
significant compared to the register allocation and move issues.
>From gcc-bugs-return-640990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:11:23 2019
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Subject: [Bug tree-optimization/65752] Too strong optimizations int -> pointer casts
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--- Comment #59 from post+gcc at ralfj dot de ---
> With the C provenance proposal this example is undefined since 'a' is not
exposed (it's address is not converted to an integer).
However, from what I can tell, GCC's behavior does not change if we insert
'(uintptr_t) &a;' at the beginning of the function. That change should be
sufficient to make the example well-defined again.
>From gcc-bugs-return-640991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:18:55 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90120] inconsistent punctuation in translation messages
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |claziss at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The general diagnostic rules we use say that diagnostics (gfortran/ diagnostics
is an exception) shouldn't begin with a capital letter (unless such a word
would be capitalized in the middle of a sentence too) and should not end with a
dot,
that is all violated here.
As for what the DOC/DOC0/DOC1 expand too, it is easy to look up
config/arc/arc-options.def where the strings are as the last argument of
ARC_OPT or last two of ARC_OPTX. CCing the author of that, I know nothing
about ARC otherwise.
>From gcc-bugs-return-640992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:25:20 2019
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Subject: [Bug target/90125] Typo of AVX512 intrinsics
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--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
L(In reply to Jakub Jelinek from comment #2)
> Created attachment 46186 [details]
> gcc9-pr90125.patch
>
> Oops, you're right, thanks for noticing.
> Here is a full patch including testcases that FAIL without the header patch
> and succeed with that. Two tests failed, because the tests rely on actually
> using fma and at -O0 for the C code fma is not used and so there is a small
> difference, I've just tweaked constants so that it passes regardless.
LGTM.
>From gcc-bugs-return-640994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:27:45 2019
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Subject: [Bug target/90125] Typo of AVX512 intrinsics
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Hongtao.liu from comment #3)
> L(In reply to Jakub Jelinek from comment #2)
> > Created attachment 46186 [details]
> > gcc9-pr90125.patch
> >
> > Oops, you're right, thanks for noticing.
> > Here is a full patch including testcases that FAIL without the header patch
> > and succeed with that. Two tests failed, because the tests rely on actually
> > using fma and at -O0 for the C code fma is not used and so there is a small
> > difference, I've just tweaked constants so that it passes regardless.
>
> LGTM.
I'll do full bootstrap/regtest on it and post.
>From gcc-bugs-return-640993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:27:28 2019
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Subject: [Bug web/90127] Disable bugzilla [[wiki_links]] and don't confuse r12 register names with r12345 svn revisions
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Frédéric Buclin <LpSolit at gmail dot com> changed:
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--- Comment #1 from Frédéric Buclin <LpSolit at gmail dot com> ---
(In reply to Jonathan Wakely from comment #0)
> Either we should pick another syntax for wiki links, or just disable it. I
> don't think anybody uses it.
Which solution do you prefer?
> Secondly, the shortcuts for svn revisions like r12345 also match register
> names like r1, r12, r123 and that's also distracting. I suggest that it
> should only link to an svn revision for 4 or more digits. GCC supports
> targets that have register names with three digits, and I doubt there's any
> need to link to the first 999 svn revisions.
OK, I will do it.
>From gcc-bugs-return-640995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:32:08 2019
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Subject: [Bug translation/90120] inconsistent punctuation in translation messages
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Claudiu Zissulescu <claziss at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |claziss at gmail dot com
--- Comment #2 from Claudiu Zissulescu <claziss at gmail dot com> ---
I can craft quickly a patch to fix the upper/dot issue. Is it ok?
>From gcc-bugs-return-640996-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 10:34:49 2019
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Subject: [Bug web/90127] Disable bugzilla [[wiki_links]] and don't confuse r12 register names with r12345 svn revisions
Date: Wed, 17 Apr 2019 10:34:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Would it be easy to only link for strings that look like WikiNames and not
identifiers in all lowercase like "noreturn"?
e.g. a regex like [[:upper:]][[:alnum:]]+
That way [[InstallingGCC]] and [[DebuggingGCC]] and [[LibstdcxxTodo]] would
still be links, but C++ attributes would not.
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Wed, 17 Apr 2019 10:51:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The first above is on:
case MINUS:
/* If X is (minus C Y) where C's least set bit is larger than any bit
in the mask, then we may replace with (neg Y). */
if (poly_int_rtx_p (XEXP (x, 0), &const_op0)
&& (unsigned HOST_WIDE_INT) known_alignment (const_op0) > mask)
and
template<unsigned int N, typename Ca>
inline POLY_BINARY_COEFF (Ca, Ca)
known_alignment (const poly_int_pod<N, Ca> &a)
{
typedef POLY_BINARY_COEFF (Ca, Ca) C;
C r = a.coeffs[0];
for (unsigned int i = 1; i < N; ++i)
r |= a.coeffs[i];
return r & -r;
}
The poly_int* stuff makes this much harder to fix, it is unclear if there is
some way to get the unsigned type for the C type and use that as r & -(Cuns) r;
to avoid the UB, and there is no poly_uint_rtx_p or something to request
poly_uint64 from the rtx. Richard?
The second one is
return (!known_size_p (decl_size) || known_eq (decl_size, 0)
? maybe_ne (offset, 0)
: maybe_gt (offset + size, decl_size));
and again, both offset and size are poly_int64, not sure how can one
reinterpret cast that to poly_uint64 for the operation and then cast back to
poly_int64.
But in that case also if we shouldn't punt on the overflow somehow.
>From gcc-bugs-return-640998-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 11:00:24 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 17 Apr 2019 11:00:00 -0000
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--- Comment #16 from Nikolay Bogoychev <nheart at gmail dot com> ---
Created attachment 46187
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46187&action=edit
target("arch=foo") doesn't work
(In reply to Martin Liška from comment #15)
> @Nikolay:
>
> As discussed in https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00416.html
> email thread, we reached the following consensus with H.J:
>
> - As any AVX512 extensions (apart from AVX512F) can be enabled individually,
> it's difficult to come up with priorities in dispatcher.
> - We don't have a syntax for target_clone attribute where one would say e.g.
> avx512f+avx512cd+avx512er.
> - So that we would reject these (AVX512* except AVX512F) in target_clone
> attribute and we recommend to use rather.
> target_clones(arch=skylake,arch=skylake-avx512,arch=cannonlake,arch=icelake-
> client,arch=icelake-server, ..)
> - Using that one can cover used AVX512 ISA combinations for existing CPUs
>
> Does it work for you Nikolay?
@Martin:
Thank you for the detailed answer. This could work for now. I have a few
questions about it:
Wouldn't that create issues in the future if AMD decide to release avx512 for
their CPUs?
In case we are using C style target annotation (and not function
multi-versioning), should we also use target(arch=skylake-avx512) instead of
target(avx512bw)?
Also it seems that target("arch=foo") fails for my simple example with target
specific option mismatch error (but works in clang).
If I change target to avx2 it compiles again.
Cheers,
Nick
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Subject: [Bug translation/90120] inconsistent punctuation in translation messages
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--- Comment #3 from Claudiu Zissulescu <claziss at gmail dot com> ---
Added a patch to solve upper/lower issue:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00696.html
>From gcc-bugs-return-641000-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 11:22:49 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 17 Apr 2019 11:22:00 -0000
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--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> @Martin:
>
> Thank you for the detailed answer. This could work for now. I have a few
> questions about it:
>
> Wouldn't that create issues in the future if AMD decide to release avx512
> for their CPUs?
No, that will only require to add target(arch=amd-name-with-avx512).
>
> In case we are using C style target annotation (and not function
> multi-versioning), should we also use target(arch=skylake-avx512) instead of
> target(avx512bw)?
Yes. Let me discuss that with H.J.
>
> Also it seems that target("arch=foo") fails for my simple example with
> target specific option mismatch error (but works in clang).
>
> If I change target to avx2 it compiles again.
>
> Cheers,
>
> Nick
Let me investigate that.
>From gcc-bugs-return-641001-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 11:24:43 2019
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90128] New: 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 11:24:00 -0000
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Bug ID: 90128
Summary: 507.cactuBSSN_r is 9-11% slower at -Ofast and native
march/tuning on Zen CPUs
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Blocks: 26163
Target Milestone: ---
Host: x86_64-linux
Target: x86_64-linux
In my own measurements, 507.cactuBSSN_r is about 9.4% slower on an AMD
Zen CPU when compiled with GCC 9 with -Ofast and native march/mtune
than when it si compiled with GCC 8. LNT currently even shows 11.4%
regression: https://lnt.opensuse.org/db_default/v4/SPEC/spec_report/branch
I have done some bisecting and the slowdown happened in three steps.
First, the benchmark slowed by about 2% at some point before r262510
which I have not tracked down yet. Second, it then dived 3% with
r263874 but this seems to be some code-placement issue again because
the assembly of the functions which gained perf samples has not
changed in that revision and perf reported stalled-cycles-frontend
went from 4.58% to 5.02%.
However, the third regression was caused by the immediately following
revision r263875, the difference is 4.5% (7.5% is compared to GCC 8
run-time) while perf reported stalled-cycles-frontend were only 4.05%.
r263872 (good) perf stat and report:
Performance counter stats for 'numactl -C 0 -l specinvoke':
238848.989836 task-clock:u (msec) # 0.999 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
92923 page-faults:u # 0.389 K/sec
758195547230 cycles:u # 3.174 GHz
(83.33%)
34727040659 stalled-cycles-frontend:u # 4.58% frontend cycles
idle (83.33%)
15457735869 stalled-cycles-backend:u # 2.04% backend cycles
idle (83.33%)
1225370192228 instructions:u # 1.62 insn per cycle
# 0.03 stalled cycles per
insn (83.33%)
23031544594 branches:u # 96.427 M/sec
(83.34%)
18985096 branch-misses:u # 0.08% of all branches
(83.33%)
239.158442295 seconds time elapsed
# Event count (approx.): 758374775503
#
# Overhead Samples Command Shared Object Symbol
# ........ ......... ............ .................
.........................................
#
40.51% 387505 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_RHS_Body
22.34% 214782 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_Advect_Body
8.42% 80594 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_constraints_Body
7.40% 70897 cactusBSSN_r libm-2.26.so __ieee754_exp_avx
5.77% 55393 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_convertToADMBaseDtLapseShift_Body
4.99% 47952 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_convertToADMBase_Body
2.98% 28573 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_InitRHS_Body
2.44% 23623 cactusBSSN_r cactusBSSN_r_peak MoL_LinearCombination
r263874 (worse) perf stat and report:
Performance counter stats for 'numactl -C 0 -l specinvoke':
244036.523777 task-clock:u (msec) # 0.999 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
93013 page-faults:u # 0.381 K/sec
774757677736 cycles:u # 3.175 GHz
(83.33%)
38930288027 stalled-cycles-frontend:u # 5.02% frontend cycles
idle (83.33%)
15508961324 stalled-cycles-backend:u # 2.00% backend cycles
idle (83.34%)
1226167776333 instructions:u # 1.58 insn per cycle
# 0.03 stalled cycles per
insn (83.33%)
23218262947 branches:u # 95.143 M/sec
(83.33%)
18890390 branch-misses:u # 0.08% of all branches
(83.33%)
244.344340731 seconds time elapsed
# Samples: 979K of event 'cycles'
# Event count (approx.): 775138268715
#
# Overhead Samples Command Shared Object Symbol
# ........ ......... ............ .................
.........................................
#
41.43% 404835 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_RHS_Body
22.04% 216520 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_Advect_Body
8.22% 80341 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_constraints_Body
7.26% 71052 cactusBSSN_r libm-2.26.so __ieee754_exp_avx
5.86% 57419 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_convertToADMBaseDtLapseShift_Body
4.89% 48084 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_convertToADMBase_Body
2.92% 28579 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_InitRHS_Body
2.38% 23520 cactusBSSN_r cactusBSSN_r_peak MoL_LinearCombination
r263875 (bad) perf stat and report (note that branch misses grew by 6%):
Performance counter stats for 'numactl -C 0 -l specinvoke':
254984.828108 task-clock:u (msec) # 0.999 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
92949 page-faults:u # 0.365 K/sec
809505457529 cycles:u # 3.175 GHz
(83.33%)
32784020923 stalled-cycles-frontend:u # 4.05% frontend cycles
idle (83.33%)
15658463714 stalled-cycles-backend:u # 1.93% backend cycles
idle (83.33%)
1225361873924 instructions:u # 1.51 insn per cycle
# 0.03 stalled cycles per
insn (83.33%)
23461309363 branches:u # 92.011 M/sec
(83.34%)
20152382 branch-misses:u # 0.09% of all branches
(83.33%)
255.313012246 seconds time elapsed
# Event count (approx.): 812138555051
#
# Overhead Samples Command Shared Object Symbol
# ........ ......... ............ .................
.........................................
#
37.54% 384512 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_RHS_Body
27.51% 282987 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_Advect_Body
7.80% 79887 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_constraints_Body
6.86% 70384 cactusBSSN_r libm-2.26.so __ieee754_exp_avx
5.73% 58878 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_convertToADMBaseDtLapseShift_Body
4.66% 47990 cactusBSSN_r cactusBSSN_r_peak
ML_BSSN_convertToADMBase_Body
2.79% 28638 cactusBSSN_r cactusBSSN_r_peak ML_BSSN_InitRHS_Body
2.28% 23615 cactusBSSN_r cactusBSSN_r_peak MoL_LinearCombination
I did the bisecting on a machine with glibc 2.26 but the issue was
detected on one with glibc 2.29.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
>From gcc-bugs-return-641002-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 11:27:00 2019
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Subject: [Bug target/79869] i18n: document placeholders for translators
Date: Wed, 17 Apr 2019 11:27:00 -0000
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--- Comment #3 from Claudiu Zissulescu <claziss at gmail dot com> ---
DOC is string that shortly describes an machine dependent option. This string
is used to throw an warning/error when the underling option is not available
for a specific architecture, which can be arcem, arc700, arc6xx or archs.
The DOC definitions are in arc/arc-options.def
The arches name are defined in arc/arc-arches.def
>From gcc-bugs-return-641003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 11:44:51 2019
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Subject: [Bug tree-optimization/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 11:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the issue is in ML_BSSN_Advect_Body (the other function rebounded). I will
have a look.
>From gcc-bugs-return-641004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:07:12 2019
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Subject: [Bug tree-optimization/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 12:07:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ugh. Cactus is really ugly code :/ For one there's an invariant switch () in
the innermost loop, expanded to a binary tree (slightly different split point
GCC 8 vs. trunk), obviously unswitching cannot handle this. This is a general
missed optimization precluding any vectorization attempt here. Then we spill
the hell out of us because of the way the code is written. Other than that
I don't see anything obvious here. It might be that trunk:
5802: 83 fb 06 cmp $0x6,%ebx
5805: 0f 84 25 84 00 00 je dc30
<_ZL19ML_BSSN_Advect_BodyPK4
_cGHiiPKdS3_S3_PKiS5_iPKPd+0xdc30>
580b: 0f 8f cf 1d 00 00 jg 75e0
<_ZL19ML_BSSN_Advect_BodyPK4_cGHiiPKdS3_S3_PKiS5_iPKPd+0x75e0>
5811: 83 fb 02 cmp $0x2,%ebx
5814: 0f 85 06 c0 ff ff jne 1820
<_ZL19ML_BSSN_Advect_BodyPK4_cGHiiPKdS3_S3_PKiS5_iPKPd+0x1820>
is worse to the branch predictor than the GCC 8 version
89ee: 0f 84 bc 64 00 00 je eeb0
<_ZL19ML_BSSN_Advect_BodyPK4
_cGHiiPKdS3_S3_PKiS5_iPKPd+0xeeb0>
89f4: 0f 8e 96 45 00 00 jle cf90
<_ZL19ML_BSSN_Advect_BodyPK4_cGHiiPKdS3_S3_PKiS5_iPKPd+0xcf90>
89fa: 8b b4 24 a8 08 00 00 mov 0x8a8(%rsp),%esi
8a01: 83 fe 06 cmp $0x6,%esi
8a04: 0f 85 e6 8e ff ff jne 18f0
<_ZL19ML_BSSN_Advect_BodyPK4_cGHiiPKdS3_S3_PKiS5_iPKPd+0x18f0>
(notice the "padding" reload). That is probably going to depend on final
code layout again of course. I recall reading a third conditional jump
in a fetch word requires an additional branch predictor slot or so.
So it would be interesting to see if the branch misses accumulate on
that binary tree generated from the loop invariant switch where in
theory those should be all totally predictable.
That said, I'm not yet able to reproduce the slowdown but will try.
>From gcc-bugs-return-641005-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:11:15 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
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--- Comment #18 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #17)
> >
> > @Martin:
> >
> > Thank you for the detailed answer. This could work for now. I have a few
> > questions about it:
> >
> > Wouldn't that create issues in the future if AMD decide to release avx512
> > for their CPUs?
>
> No, that will only require to add target(arch=amd-name-with-avx512).
>
> >
> > In case we are using C style target annotation (and not function
> > multi-versioning), should we also use target(arch=skylake-avx512) instead of
> > target(avx512bw)?
For C style, the functionality will be preserved as is.
>
> Yes. Let me discuss that with H.J.
>
> >
> > Also it seems that target("arch=foo") fails for my simple example with
> > target specific option mismatch error (but works in clang).
> >
> > If I change target to avx2 it compiles again.
This looks to me a bug, I'll create a separated PR for that.
Thanks
> >
> > Cheers,
> >
> > Nick
>
> Let me investigate that.
>From gcc-bugs-return-641006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:16:41 2019
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvOTAxMjldIE5ldzogV3JvbmcgZXJyb3I6IGlubGluaW5n?= =?UTF-8?B?IGZhaWxlZCBpbiBjYWxsIHRvIGFsd2F5c19pbmxpbmUg4oCYX21tMjU2X2Fk?= =?UTF-8?B?ZHNfZXBpMTbigJk6IHRhcmdldCBzcGVjaWZpYyBvcHRpb24gbWlzbWF0Y2g=?Date: Wed, 17 Apr 2019 12:16:00 -0000
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Bug ID: 90129
Summary: Wrong error: inlining failed in call to always_inline
‘_mm256_adds_epi16’: target specific option mismatch
Product: gcc
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Following code should be accepted:
$ cat pragma.c
#include <xmmintrin.h>
#include <emmintrin.h>
#include <immintrin.h>
#pragma GCC target ("arch=haswell")
__m256i adds_epi16(__m256i first, __m256i second) {
return _mm256_adds_epi16(first, second);
}
But we reject that since for ever:
gcc pragma.c
In file included from
/usr/lib64/gcc/x86_64-suse-linux/8/include/immintrin.h:43,
from pragma.c:3:
pragma.c: In function ‘adds_epi16’:
/usr/lib64/gcc/x86_64-suse-linux/8/include/avx2intrin.h:140:1: error: inlining
failed in call to always_inline ‘_mm256_adds_epi16’: target specific option
mismatch
_mm256_adds_epi16 (__m256i __A, __m256i __B)
^~~~~~~~~~~~~~~~~
pragma.c:8:10: note: called from here
return _mm256_adds_epi16(first, second);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
While:
cat pragma.c && gcc pragma.c -march=haswell -c
#include <xmmintrin.h>
#include <emmintrin.h>
#include <immintrin.h>
__m256i adds_epi16(__m256i first, __m256i second) {
return _mm256_adds_epi16(first, second);
}
is fine
>From gcc-bugs-return-641007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:21:25 2019
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Subject: [Bug tree-optimization/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 12:21:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Direct graph link to branch comparison:
https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=148.437.0&plot.1=59.437.0&plot.2=76.437.0&plot.3=33.437.0&
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvOTAxMjldIFdyb25nIGVycm9yOiBpbmxpbmluZyBmYWls?= =?UTF-8?B?ZWQgaW4gY2FsbCB0byBhbHdheXNfaW5saW5lIOKAmF9tbTI1Nl9hZGRzX2Vw?= =?UTF-8?B?aTE24oCZOiB0YXJnZXQgc3BlY2lmaWMgb3B0aW9uIG1pc21hdGNo?Date: Wed, 17 Apr 2019 12:34:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
IIRC we have a duplicate for this (albeit with -msse2 vs. none)
>From gcc-bugs-return-641009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:35:55 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 12:35:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> Ugh. Cactus is really ugly code :/ For one there's an invariant switch ()
> in the innermost loop, expanded to a binary tree (slightly different split
> point
> GCC 8 vs. trunk), obviously unswitching cannot handle this.
Yes, the binary tree is bit different, but equally good to me:
GCC 8:
if (fdOrder_15741 == 4)
goto <bb 193>; [20.00%]
else
goto <bb 188>; [80.00%]
<bb 188> [local count: 955630223]:
if (fdOrder_15741 > 4)
goto <bb 190>; [62.50%]
else
goto <bb 189>; [37.50%]
<bb 189> [local count: 955630223]:
if (fdOrder_15741 == 2)
goto <bb 192>; [66.67%]
else
goto <bb 196>; [33.33%]
<bb 190> [local count: 955630223]:
if (fdOrder_15741 == 6)
goto <bb 194>; [40.00%]
else
goto <bb 191>; [60.00%]
<bb 191> [local count: 955630223]:
if (fdOrder_15741 == 8)
goto <bb 195>; [66.67%]
else
goto <bb 196>; [33.33%]
GCC 9:
if (fdOrder_13024 == 6)
goto <bb 194>; [20.00%]
else
goto <bb 188>; [80.00%]
<bb 188> [local count: 955630224]:
if (fdOrder_13024 > 6)
goto <bb 191>; [37.50%]
else
goto <bb 189>; [62.50%]
<bb 189> [local count: 955630224]:
if (fdOrder_13024 == 2)
goto <bb 192>; [40.00%]
else
goto <bb 190>; [60.00%]
<bb 190> [local count: 955630224]:
if (fdOrder_13024 == 4)
goto <bb 193>; [100.00%]
else
goto <bb 196>; [0.00%]
<bb 191> [local count: 955630224]:
if (fdOrder_13024 == 8)
goto <bb 195>; [66.67%]
else
goto <bb 196>; [33.33%]
>From gcc-bugs-return-641010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:38:28 2019
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 17 Apr 2019 12:38:00 -0000
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--- Comment #54 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Hmm, I see. What I am trying to accomplish is, put the target
attribute on every function that calls directly or in-directly
to CONTINUE_UNWINDING. And do that only for ARM.
For gdc_personality it is straight forward to do, as you pointed out.
But for __gdc_personality and scanLSDA what I would like to do is
static if (GNU_ARM_EABI_Unwinder)
{
@attribute("target", ("general-regs-only"))
}
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
{
...
but that does not work, what would work is
static if (GNU_ARM_EABI_Unwinder)
{
@attribute("target", ("general-regs-only"))
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
{
...
}
}
else
{
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
{
...
}
}
duplicating all that code is of course not an option.
>From gcc-bugs-return-641011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:40:18 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 17 Apr 2019 12:40:00 -0000
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--- Comment #55 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
But, how about that:
Index: deh.d
===================================================================
--- deh.d (revision 270395)
+++ deh.d (working copy)
@@ -28,6 +28,7 @@
import gcc.unwind.pe;
import gcc.builtins;
import gcc.config;
+import gcc.attribute;
extern(C)
{
@@ -519,10 +520,21 @@
terminate("unwind error", __LINE__);
}
+static if (GNU_ARM_EABI_Unwinder)
+{
+ enum ATTRIBUTE_NAME = "target";
+ enum ATTRIBUTE_ARGS = "general-regs-only";
+}
+else
+{
+ enum ATTRIBUTE_NAME = "";
+ enum ATTRIBUTE_ARGS = "";
+}
/**
* Read and extract information from the LSDA (.gcc_except_table section).
*/
+@attribute(ATTRIBUTE_NAME, (ATTRIBUTE_ARGS))
_Unwind_Reason_Code scanLSDA(const(ubyte)* lsda, _Unwind_Exception_Class
exceptionClass,
_Unwind_Action actions, _Unwind_Exception*
unwindHeader,
_Unwind_Context* context, _Unwind_Word cfa,
@@ -772,6 +784,7 @@
* Called when the personality function has found neither a cleanup or
handler.
* To support ARM EABI personality routines, that must also unwind the stack.
*/
+@attribute(ATTRIBUTE_NAME, (ATTRIBUTE_ARGS))
_Unwind_Reason_Code CONTINUE_UNWINDING(_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
{
static if (GNU_ARM_EABI_Unwinder)
@@ -814,6 +827,7 @@
static if (GNU_ARM_EABI_Unwinder)
{
pragma(mangle, PERSONALITY_FUNCTION)
+ @attribute(ATTRIBUTE_NAME, (ATTRIBUTE_ARGS))
extern(C) _Unwind_Reason_Code gdc_personality(_Unwind_State state,
_Unwind_Exception*
unwindHeader,
_Unwind_Context* context)
@@ -873,6 +887,7 @@
}
}
+@attribute(ATTRIBUTE_NAME, (ATTRIBUTE_ARGS))
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
>From gcc-bugs-return-641012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:43:49 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #56 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't you just add prototypes?
Like:
static if (GNU_ARM_EABI_Unwinder)
{
@attribute("target", ("general-regs-only"))
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
_Unwind_Context* context);
}
etc. before the actual definitions? attribute ("", ("")) seems ugly.
>From gcc-bugs-return-641014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:48:57 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 12:48:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
CPU 2006 436.cactusADM also has an interesting history:
https://gcc.opensuse.org/gcc-old/SPEC/CFP/sb-czerny-head-64-2006/436_cactusADM_big.png
>From gcc-bugs-return-641013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:48:44 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #57 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Jakub Jelinek from comment #56)
> Can't you just add prototypes?
> Like:
> static if (GNU_ARM_EABI_Unwinder)
> {
> @attribute("target", ("general-regs-only"))
> private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
> _Unwind_Exception_Class
> exceptionClass,
> _Unwind_Exception*
> unwindHeader,
> _Unwind_Context* context);
> }
> etc. before the actual definitions? attribute ("", ("")) seems ugly.
I think that is worth a try. hang on...
>From gcc-bugs-return-641015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:52:35 2019
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Subject: [Bug tree-optimization/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> CPU 2006 436.cactusADM also has an interesting history:
> https://gcc.opensuse.org/gcc-old/SPEC/CFP/sb-czerny-head-64-2006/
> 436_cactusADM_big.png
compared to other benchmarks it is also quite noisy - esp. in the timeframe
of this regression.
>From gcc-bugs-return-641016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:55:37 2019
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Subject: [Bug d/88150] Use sections_elf_shared.d on Solaris
Date: Wed, 17 Apr 2019 12:55:00 -0000
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--- Comment #16 from Martin Nowak <code at dawg dot eu> ---
Regarding the dlopen/dlclose in handleForName, the semantics of RTLD_NOLOAD are
so that it bumps the reference count if the library had been previously loaded.
The sections module uses the handle as identifier to distinguish different DSOs
and store metadata.
Due to the self-registration mechanism of D DSOs (see _d_dso_registry) any D
library remains loaded and (presumably) keeps the same handle if it is needed
by the executable and loaded during startup.
If a shared library is loaded dynamically, then the dlopen/dlclose actions will
surround the calls to _d_dso_registry by the library, hence the handle should
stay valid while until the DSO is unregistered.
This is a lot of low-level plumbing (without going into private runtime linker
structs) and semantics have been modeled after Linux and FreeBSD. If they
differ on Solaris the code might indeed need some fixup.
The RTLD_NOLOAD behavior of only inc-refing already loaded libs isn't well
documented but seems like the only sensible one.
>From gcc-bugs-return-641017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 12:58:36 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 17 Apr 2019 12:58:00 -0000
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--- Comment #19 from Nikolay Bogoychev <nheart at gmail dot com> ---
(In reply to Martin Liška from comment #18)
> (In reply to Martin Liška from comment #17)
> > >
> > > @Martin:
> > >
> > > Thank you for the detailed answer. This could work for now. I have a few
> > > questions about it:
> > >
> > > Wouldn't that create issues in the future if AMD decide to release avx512
> > > for their CPUs?
> >
> > No, that will only require to add target(arch=amd-name-with-avx512).
> >
Does this mean that if I have an avx512bw+dq function, I'd have to have two
identical versions of it that I have to target with arch=canonlake and
arch=amd-something-with-avx512? Seems a bit... unellegant.
>
> > >
> > > Cheers,
> > >
> > > Nick
> >
> > Let me investigate that.
Thanks for opening the bug
Cheers,
Nick
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com,
| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This one is because of:
/* See if arch, tune, etc. are the same. */
else if (caller_opts->arch != callee_opts->arch)
ret = false;
For tune we ignore it if always_inline, the question is what should we do for
arch for always_inline. I'm afraid we don't have a notion of arches being
subset or superset of each other.
>From gcc-bugs-return-641019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:08:10 2019
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
Date: Wed, 17 Apr 2019 13:08:00 -0000
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--- Comment #4 from Ian Lance Taylor <ian at airs dot com> ---
Thanks for the file. Unfortunately it looks fine.
The error is coming from Import_function_body::read_type in
gcc/go/gofrontend/import.cc. At the point of the error this->body_ +
this->off_ points to a string starting with "<type 4>,". The function starts
like this:
this->require_c_string("<type ");
size_t start = this->off_;
size_t i;
int c = '\0';
for (i = start; i < this->body_.length(); ++i)
{
c = static_cast<unsigned char>(this->body_[i]);
if (c != '-' && (c < '0' || c > '9'))
break;
}
this->off_ = i + 1;
char *end;
long val = strtol(this->body_.substr(start, i - start).c_str(), &end, 10);
if (*end != '\0' || i > 0x7fffffff)
{
if (!this->saw_error_)
go_error_at(this->location(),
"invalid export data for %qs: expected integer at %lu",
this->name().c_str(),
static_cast<unsigned long>(start));
this->saw_error_ = true;
return Type::make_error_type();
}
It skips "<type ", leaving itself looking at "4>,". It steps past the "4".
Then it passes "4\0" to strtol. Somehow that is failing.
Since, needless to say, I can't reproduce the problem, do you have time to add
a bit of debugging around the strtol call, to see what is being passed and
returned?
>From gcc-bugs-return-641020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:12:28 2019
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Subject: [Bug target/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Component|tree-optimization |target
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Benchmarking r270408 on branch vs. trunk on Haswell doesn't show any regression
for me. Will double-check with up-to-date CPU 2017 tree.
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
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--- Comment #5 from Andreas Schwab <schwab@linux-m68k.org> ---
What is the condition i > 0x7fffffff for? Shouldn't that test val instead?
>From gcc-bugs-return-641022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:29:14 2019
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Subject: [Bug middle-end/90095] [9 Regression] wrong code with -Os -fno-tree-bit-ccp
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 17 13:28:39 2019
New Revision: 270410
URL: https://gcc.gnu.org/viewcvs?rev=270410&root=gcc&view=rev
Log:
PR middle-end/90095
* internal-fn.c (expand_mul_overflow): Don't set SUBREG_PROMOTED_VAR_P
on lowpart SUBREGs.
* gcc.dg/pr90095-1.c: New test.
* gcc.dg/pr90095-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr90095-1.c
trunk/gcc/testsuite/gcc.dg/pr90095-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/internal-fn.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 17 Apr 2019, ian at airs dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90110
>
> --- Comment #4 from Ian Lance Taylor <ian at airs dot com> ---
> Thanks for the file. Unfortunately it looks fine.
>
> The error is coming from Import_function_body::read_type in
> gcc/go/gofrontend/import.cc. At the point of the error this->body_ +
> this->off_ points to a string starting with "<type 4>,". The function starts
> like this:
>
> this->require_c_string("<type ");
> size_t start = this->off_;
> size_t i;
> int c = '\0';
> for (i = start; i < this->body_.length(); ++i)
> {
> c = static_cast<unsigned char>(this->body_[i]);
> if (c != '-' && (c < '0' || c > '9'))
> break;
> }
> this->off_ = i + 1;
>
> char *end;
> long val = strtol(this->body_.substr(start, i - start).c_str(), &end, 10);
Just a wild guess - does this->body_.substr(start, i - start).c_str()
really live until after strtol has completed? IIRC I saw this kind
of errors in other codes... since the temporary std::string isn't
passed to the function it should be destroyed. Assuming this->body_
is a std::string, of course.
Using profiledbootstrap might just expose this "issue" I guess.
Trying whether
Index: gcc/go/gofrontend/import.cc
===================================================================
--- gcc/go/gofrontend/import.cc (revision 270403)
+++ gcc/go/gofrontend/import.cc (working copy)
@@ -1478,7 +1478,8 @@ Import_function_body::read_type()
this->off_ = i + 1;
char *end;
- long val = strtol(this->body_.substr(start, i - start).c_str(), &end,
10);
+ std::string subs = this->body_.substr(start, i - start);
+ long val = strtol(subs.c_str(), &end, 10);
if (*end != '\0' || i > 0x7fffffff)
{
if (!this->saw_error_)
fixes the issue for me (will report back tomorrow). Just in case
this is indeed an obvious error feel free to fix faster than that ;)
>From gcc-bugs-return-641024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:32:17 2019
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Subject: [Bug target/89929] __attribute__((target("avx512bw"))) doesn't work on non avx512bw systems
Date: Wed, 17 Apr 2019 13:32:00 -0000
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--- Comment #20 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> Does this mean that if I have an avx512bw+dq function, I'd have to have two
> identical versions of it that I have to target with arch=canonlake and
> arch=amd-something-with-avx512? Seems a bit... unellegant.
>
If you use target_clone attribute of target attribute in C++ (with
automatically generated resolver function), then yes. You'll need 2 functions,
but you can use alias as seen here:
void xxx () { __builtin_printf ("haswell or skylake CPU\n"); }
void __attribute__ ((target("arch=haswell"),alias("_Z3xxxv"))) foo ();
void __attribute__ ((target("arch=skylake-avx512"),alias("_Z3xxxv"))) foo ();
void __attribute__ ((target("arch=skylake"))) foo () {}
void __attribute__ ((target("default"))) foo () {}
int main()
{
foo ();
return 0;
}
>From gcc-bugs-return-641025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:42:34 2019
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Subject: [Bug target/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 13:42:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #7)
> Benchmarking r270408 on branch vs. trunk on Haswell doesn't show any
> regression
> for me. Will double-check with up-to-date CPU 2017 tree.
Confirmed.
>From gcc-bugs-return-641026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:49:53 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #30 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is the *movsi_compare0 pattern actually ever a benefit before RA? At least in
this case it clearly results in a worse generated code rather than better, and
I bet in other cases too, it just ties the hands of the RA too much.
I wonder if it better shouldn't be a pattern that is only matched when
reload_completed and recognized say by a peephole2 or something similar.
>From gcc-bugs-return-641027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:50:31 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 17 Apr 2019 13:50:00 -0000
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--- Comment #58 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
No, sorry, the attribute on the prototype gets ignored, as the following
is compiled without generating an error:
private int test(double x)
{
return x > 1.0;
}
static if (GNU_ARM_EABI_Unwinder)
{
@attribute("target", ("general-regs-only"))
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception*
unwindHeader,
_Unwind_Context* context);
}
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
{
const(ubyte)* lsda;
_Unwind_Ptr landingPad;
_Unwind_Word cfa;
int handler;
test(3.14);
// Shortcut for phase 2 found handler for domestic exception.
if (actions == (_UA_CLEANUP_PHASE | _UA_HANDLER_FRAME)
&& isGdcExceptionClass(exceptionClass))
{
ExceptionHeader.restore(unwindHeader, handler, lsda, landingPad, cfa);
but with the previous patch calling test(3.14) gives this:
../../../../gcc-trunk/libphobos/libdruntime/gcc/deh.d: In function
'__gdc_personality':
../../../../gcc-trunk/libphobos/libdruntime/gcc/deh.d:906:1: error: argument of
type 'double' not permitted with -mgeneral-regs-only
906 | test(3.14);
| ^
>From gcc-bugs-return-641028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 13:53:57 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 17 Apr 2019 13:53:00 -0000
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--- Comment #59 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That looks like a D FE bug then.
In any case, why can't you just use -mgeneral-regs-only on the deh.d
compilation command line?
>From gcc-bugs-return-641029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 14:07:49 2019
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Subject: [Bug d/90130] New: gdc.test/runnable/test12.d FAILs
Date: Wed, 17 Apr 2019 14:07:00 -0000
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Bug ID: 90130
Summary: gdc.test/runnable/test12.d FAILs
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Target: sparc*-*-solaris2.11
The gdc.test/runnable/test12.d test FAILs on Solaris 11/SPARC with Robin's
big-endian
patches applied:
FAIL: gdc.test/runnable/test12.d -finline-functions -funittest -g execution
test
core.exception.AssertError@runnable/test12.d(630): Assertion failure
----------------
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/gcc/deh.d:499 _d_throw
[0x1001bb58f]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:441
onAssertError [0x1001b880b]
/vol/gcc/src/hg/trunk/solaris/libphobos/libdruntime/core/exception.d:641
_d_assert [0x1001b8e13]
runnable/test12.d:630 int test12.hoge(test12.S29) [0x100112ddf]
runnable/test12.d:642 void test12.test29() [0x100112e4b]
runnable/test12.d:1220 _Dmain [0x100114fc7]
Thread 2 hit Breakpoint 1, test12.hoge(test12.S29) (s=...)
at runnable/test12.d:624
624 char[10] b;
(gdb) n
625 printf("%x\n", s);
(gdb) p s
$1 = {a = 1 '\001', b = 2 '\002', c = 3 '\003', d = 4 '\004'}
(gdb) n
ffbfe4d0
626 sprintf(b.ptr, "%x", s);
(gdb) n
630 assert(b[0 .. 7] == "1020304");
(gdb) p b
$2 = "ffbfe4d0\000\377"
This ia another call-by-value vs. call-by-reference issue: the test assumes
that passing a small struct (struct S29) happens by value. While this is true
in some ABIs, it's certainly not in others (like the 32-bit SPARC one) where
even small structs are passed by reference. PR d/90079 is another instance
of the same problem.
(gdb) p/x *&s
$11 = {a = 0x1, b = 0x2, c = 0x3, d = 0x4}
(gdb) p s
$12 = {a = 1 '\001', b = 2 '\002', c = 3 '\003', d = 4 '\004'}
(gdb) p/x *(int *)&s
$13 = 0x1020304
However, the test also FAILs on 64-bit SPARC where small structs *are* passed
by value:
(gdb) p s
$1 = {a = 1 '\001', b = 2 '\002', c = 3 '\003', d = 4 '\004'}
(gdb) p b
$2 = "\000\000\000\000\000\000\000\000\000"
(gdb) n
625 printf("%x\n", s);
(gdb) n
0
626 sprintf(b.ptr, "%x", s);
(gdb) n
630 assert(b[0 .. 7] == "1020304");
(gdb) p b
$3 = "0\000\377\377\377\377\377\377\377\377"
(gdb) p/x *(int *)&s
$9 = 0x1020304
I don't fully see why yet, however all this strongly argues that this part of
testcase is bogus: you cannot pass a struct to sprintf whose format string
expects an int.
>From gcc-bugs-return-641030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 14:08:23 2019
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Subject: [Bug d/90130] gdc.test/runnable/test12.d FAILs
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |9.0
>From gcc-bugs-return-641031-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 14:13:49 2019
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
Date: Wed, 17 Apr 2019 14:13:00 -0000
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--- Comment #7 from Ian Lance Taylor <ian at airs dot com> ---
> What is the condition i > 0x7fffffff for? Shouldn't that test val instead?
Yes, it certainly should. Thanks. It's not the problem here, but should be
fixed.
> Just a wild guess - does this->body_.substr(start, i - start).c_str()
really live until after strtol has completed?
I *think* it should be OK. The rule in C++ is that temporary objects are
destroyed after the full expression that lexically contains the point at which
they are created has been evaluated. In this case the full expression is the
call to strtol, so the temporary object created by the call to substr should
live until the call to strtol is complete.
>From gcc-bugs-return-641032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 14:34:53 2019
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
Date: Wed, 17 Apr 2019 14:34:00 -0000
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Florian Weimer <fw at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |fw at gcc dot gnu.org
--- Comment #8 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #7)
> > What is the condition i > 0x7fffffff for? Shouldn't that test val instead?
>
> Yes, it certainly should. Thanks. It's not the problem here, but should be
> fixed.
>
> > Just a wild guess - does this->body_.substr(start, i - start).c_str()
> really live until after strtol has completed?
>
> I *think* it should be OK. The rule in C++ is that temporary objects are
> destroyed after the full expression that lexically contains the point at
> which they are created has been evaluated. In this case the full expression
> is the call to strtol, so the temporary object created by the call to substr
> should live until the call to strtol is complete.
I think the *end != '\0' check is the problem here. The temporary object is
gone at that point.
>From gcc-bugs-return-641033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:22:56 2019
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From: "qrzhang at gatech dot edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/90131] New: wrong debug info at -O3
Date: Wed, 17 Apr 2019 15:22:00 -0000
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Bug ID: 90131
Summary: wrong debug info at -O3
Product: gcc
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Target Milestone: ---
This issue is similar to bug 90074 --- same flag, same gcc versions. The
bisection also points to r255267. It appears that the issue remains after the
patch.
$ gcc-trunk -v
gcc version 9.0.1 20190417 (experimental) [trunk revision 270407] (GCC)
$ gdb -v
GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.5) 7.11.1
#Wrong result#
$ gcc-trunk -g abc.c outer.c -O3
$ gdb -x cmds -batch a.out
Breakpoint 1 at 0x40040f: file abc.c, line 16.
Breakpoint 1, main () at abc.c:16
16 optimize_me_not();
$1 = 9
#Correct result#
$ gcc-trunk -g abc.c outer.c
$ gdb -x cmds -batch a.out
Breakpoint 1 at 0x4004c8: file abc.c, line 16.
Breakpoint 1, main () at abc.c:16
16 optimize_me_not();
$1 = 0
$ cat abc.c
volatile long a;
int b[9][1];
static short c[2][1] = {3};
int main() {
int i, d, e;
i = 0;
for (; i < 9; i++)
a = b[i][0];
i = 0;
for (; i < 2; i++) {
d = 0;
for (; d < 1; d++) {
e = 0;
for (; e < 1; e++)
a = c[i][e];
optimize_me_not();
}
}
}
$ cat outer.c
void optimize_me_not() {}
$ cat cmds
b 16
r
p i
kill
q
>From gcc-bugs-return-641034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:29:33 2019
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Subject: [Bug web/90127] Disable bugzilla [[wiki_links]] and don't confuse r12 register names with r12345 svn revisions
Date: Wed, 17 Apr 2019 15:29:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
oh yeah this has been bothering me for a while now; good to see an effort to
finally do something about it!
>From gcc-bugs-return-641035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:38:31 2019
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Subject: [Bug c++/88136] -Wdeprecated-copy is draconian and shouldn't be in -Wall
Date: Wed, 17 Apr 2019 15:38:00 -0000
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maic <maic23 at live dot de> changed:
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CC| |maic23 at live dot de
--- Comment #8 from maic <maic23 at live dot de> ---
Indeed this will be hit even when the own code has no issue, but qt headers are
included. See also https://github.com/bitcoin/bitcoin/issues/15822
>From gcc-bugs-return-641037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:40:50 2019
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From: "kelvin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87532] bad results from vec_extract(unsigned char, foo) dependent upon function inline
Date: Wed, 17 Apr 2019 15:40:00 -0000
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--- Comment #18 from kelvin at gcc dot gnu.org ---
Author: kelvin
Date: Wed Apr 17 15:40:12 2019
New Revision: 270413
URL: https://gcc.gnu.org/viewcvs?rev=270413&root=gcc&view=rev
Log:
gcc/ChangeLog:
2019-04-17 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
When handling vec_extract, use modular arithmetic to allow
constant selectors greater than vector length.
* config/rs6000/rs6000.c (rs6000_expand_vector_extract): Allow
V1TImode vectors to have constant selector values greater than 0.
Use modular arithmetic to compute vector index.
(rs6000_split_vec_extract_var): Use modular arithmetic to compute
index for in-memory vectors. Correct code generation for
in-register vectors. Use inner mode of vector rather than mode of
destination for move instruction.
(altivec_expand_vec_ext_builtin): Use modular arithmetic to
compute index.
2019-04-12 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/vsx.md (*vsx_extract_<mode>_<VS_scalar>mode_var):
Use QI inner mode with V16QI vector mode.
gcc/testsuite/ChangeLog:
2019-04-17 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* gcc.target/powerpc/pr87532.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2.h: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2a.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2b.c: New test.
* gcc.target/powerpc/vsx-builtin-10a.c: New test.
* gcc.target/powerpc/vsx-builtin-10b.c: New test.
* gcc.target/powerpc/vsx-builtin-11a.c: New test.
* gcc.target/powerpc/vsx-builtin-11b.c: New test.
* gcc.target/powerpc/vsx-builtin-12a.c: New test.
* gcc.target/powerpc/vsx-builtin-12b.c: New test.
* gcc.target/powerpc/vsx-builtin-13a.c: New test.
* gcc.target/powerpc/vsx-builtin-13b.c: New test.
* gcc.target/powerpc/vsx-builtin-14a.c: New test.
* gcc.target/powerpc/vsx-builtin-14b.c: New test.
* gcc.target/powerpc/vsx-builtin-15a.c: New test.
* gcc.target/powerpc/vsx-builtin-15b.c: New test.
* gcc.target/powerpc/vsx-builtin-16a.c: New test.
* gcc.target/powerpc/vsx-builtin-16b.c: New test.
* gcc.target/powerpc/vsx-builtin-17a.c: New test.
* gcc.target/powerpc/vsx-builtin-17b.c: New test.
* gcc.target/powerpc/vsx-builtin-18a.c: New test.
* gcc.target/powerpc/vsx-builtin-18b.c: New test.
* gcc.target/powerpc/vsx-builtin-19a.c: New test.
* gcc.target/powerpc/vsx-builtin-19b.c: New test.
* gcc.target/powerpc/vsx-builtin-20a.c: New test.
* gcc.target/powerpc/vsx-builtin-20b.c: New test.
* gcc.target/powerpc/vsx-builtin-9a.c: New test.
* gcc.target/powerpc/vsx-builtin-9b.c: New test.
2019-03-19 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/89736
* gcc.target/powerpc/pr87532-mc.c: Modify dejagnu directives to
restrict this test to vsx targets.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87532-mc.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87532.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2.h
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9b.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000-c.c
branches/gcc-8-branch/gcc/config/rs6000/rs6000.c
branches/gcc-8-branch/gcc/config/rs6000/vsx.md
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "kelvin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89736] New test pr87532-mc.c fails on compiler not defaulting to VSX
Date: Wed, 17 Apr 2019 15:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89736
--- Comment #5 from kelvin at gcc dot gnu.org ---
Author: kelvin
Date: Wed Apr 17 15:40:12 2019
New Revision: 270413
URL: https://gcc.gnu.org/viewcvs?rev=270413&root=gcc&view=rev
Log:
gcc/ChangeLog:
2019-04-17 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
When handling vec_extract, use modular arithmetic to allow
constant selectors greater than vector length.
* config/rs6000/rs6000.c (rs6000_expand_vector_extract): Allow
V1TImode vectors to have constant selector values greater than 0.
Use modular arithmetic to compute vector index.
(rs6000_split_vec_extract_var): Use modular arithmetic to compute
index for in-memory vectors. Correct code generation for
in-register vectors. Use inner mode of vector rather than mode of
destination for move instruction.
(altivec_expand_vec_ext_builtin): Use modular arithmetic to
compute index.
2019-04-12 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/vsx.md (*vsx_extract_<mode>_<VS_scalar>mode_var):
Use QI inner mode with V16QI vector mode.
gcc/testsuite/ChangeLog:
2019-04-17 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* gcc.target/powerpc/pr87532.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2.h: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2a.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2b.c: New test.
* gcc.target/powerpc/vsx-builtin-10a.c: New test.
* gcc.target/powerpc/vsx-builtin-10b.c: New test.
* gcc.target/powerpc/vsx-builtin-11a.c: New test.
* gcc.target/powerpc/vsx-builtin-11b.c: New test.
* gcc.target/powerpc/vsx-builtin-12a.c: New test.
* gcc.target/powerpc/vsx-builtin-12b.c: New test.
* gcc.target/powerpc/vsx-builtin-13a.c: New test.
* gcc.target/powerpc/vsx-builtin-13b.c: New test.
* gcc.target/powerpc/vsx-builtin-14a.c: New test.
* gcc.target/powerpc/vsx-builtin-14b.c: New test.
* gcc.target/powerpc/vsx-builtin-15a.c: New test.
* gcc.target/powerpc/vsx-builtin-15b.c: New test.
* gcc.target/powerpc/vsx-builtin-16a.c: New test.
* gcc.target/powerpc/vsx-builtin-16b.c: New test.
* gcc.target/powerpc/vsx-builtin-17a.c: New test.
* gcc.target/powerpc/vsx-builtin-17b.c: New test.
* gcc.target/powerpc/vsx-builtin-18a.c: New test.
* gcc.target/powerpc/vsx-builtin-18b.c: New test.
* gcc.target/powerpc/vsx-builtin-19a.c: New test.
* gcc.target/powerpc/vsx-builtin-19b.c: New test.
* gcc.target/powerpc/vsx-builtin-20a.c: New test.
* gcc.target/powerpc/vsx-builtin-20b.c: New test.
* gcc.target/powerpc/vsx-builtin-9a.c: New test.
* gcc.target/powerpc/vsx-builtin-9b.c: New test.
2019-03-19 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/89736
* gcc.target/powerpc/pr87532-mc.c: Modify dejagnu directives to
restrict this test to vsx targets.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87532-mc.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/pr87532.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2.h
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20b.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9a.c
branches/gcc-8-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9b.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/rs6000-c.c
branches/gcc-8-branch/gcc/config/rs6000/rs6000.c
branches/gcc-8-branch/gcc/config/rs6000/vsx.md
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Wed, 17 Apr 2019 15:44:00 -0000
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--- Comment #31 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It's how you do a parallel of a mov and a flags set, which of course you
can have before RA, and you want created by combine, typically. Or do I
misunderstand the question?
(I though Arm have a "movs" op for this, btw?)
>From gcc-bugs-return-641039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:50:30 2019
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Wed, 17 Apr 2019 15:50:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org
--- Comment #6 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #5)
> The first above is on:
> case MINUS:
> /* If X is (minus C Y) where C's least set bit is larger than any bit
> in the mask, then we may replace with (neg Y). */
> if (poly_int_rtx_p (XEXP (x, 0), &const_op0)
> && (unsigned HOST_WIDE_INT) known_alignment (const_op0) > mask)
> and
> template<unsigned int N, typename Ca>
> inline POLY_BINARY_COEFF (Ca, Ca)
> known_alignment (const poly_int_pod<N, Ca> &a)
> {
> typedef POLY_BINARY_COEFF (Ca, Ca) C;
> C r = a.coeffs[0];
> for (unsigned int i = 1; i < N; ++i)
> r |= a.coeffs[i];
> return r & -r;
> }
>
> The poly_int* stuff makes this much harder to fix, it is unclear if there is
> some way to get the unsigned type for the C type and use that as r & -(Cuns)
> r;
> to avoid the UB, and there is no poly_uint_rtx_p or something to request
> poly_uint64 from the rtx. Richard?
Changing:
(unsigned HOST_WIDE_INT) known_alignment (const_op0)
to:
known_alignment (poly_uint64 (const_op0))
should work.
>
> The second one is
> return (!known_size_p (decl_size) || known_eq (decl_size, 0)
> ? maybe_ne (offset, 0)
> : maybe_gt (offset + size, decl_size));
> and again, both offset and size are poly_int64, not sure how can one
> reinterpret cast that to poly_uint64 for the operation and then cast back to
> poly_int64.
Normal casts between poly_X and poly_Y work if casts between X and Y work.
> But in that case also if we shouldn't punt on the overflow somehow.
I guess using known_subrange_p would do that.
>From gcc-bugs-return-641041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:52:52 2019
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87008] [8 Regression] gimple mem-to-mem assignment badly optimized
Date: Wed, 17 Apr 2019 15:52:00 -0000
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--- Comment #12 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Wed Apr 17 15:52:16 2019
New Revision: 270414
URL: https://gcc.gnu.org/viewcvs?rev=270414&root=gcc&view=rev
Log:
2019-04-17 Martin Jambor <mjambor@suse.cz>
Backport from mainline
2019-03-10 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/85762
PR tree-optimization/87008
PR tree-optimization/85459
* tree-sra.c (contains_vce_or_bfcref_p): New parameter, set the bool
it points to if there is a type changing MEM_REF. Adjust all callers.
(build_accesses_from_assign): Disable total scalarization if
contains_vce_or_bfcref_p returns true through the new parameter, for
both rhs and lhs.
testsuite/
* g++.dg/tree-ssa/pr87008.C: New test.
* gcc.dg/guality/pr54970.c: Xfail tests querying a[0] everywhere.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/tree-ssa/pr87008.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/guality/pr54970.c
branches/gcc-8-branch/gcc/tree-sra.c
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Subject: [Bug tree-optimization/85459] [8 Regression] Larger code generated from GMP template meta-programming
Date: Wed, 17 Apr 2019 15:52:00 -0000
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--- Comment #12 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Wed Apr 17 15:52:16 2019
New Revision: 270414
URL: https://gcc.gnu.org/viewcvs?rev=270414&root=gcc&view=rev
Log:
2019-04-17 Martin Jambor <mjambor@suse.cz>
Backport from mainline
2019-03-10 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/85762
PR tree-optimization/87008
PR tree-optimization/85459
* tree-sra.c (contains_vce_or_bfcref_p): New parameter, set the bool
it points to if there is a type changing MEM_REF. Adjust all callers.
(build_accesses_from_assign): Disable total scalarization if
contains_vce_or_bfcref_p returns true through the new parameter, for
both rhs and lhs.
testsuite/
* g++.dg/tree-ssa/pr87008.C: New test.
* gcc.dg/guality/pr54970.c: Xfail tests querying a[0] everywhere.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/tree-ssa/pr87008.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/guality/pr54970.c
branches/gcc-8-branch/gcc/tree-sra.c
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Subject: [Bug tree-optimization/85762] [8/9 Regression] range-v3 abstraction overhead not optimized away
Date: Wed, 17 Apr 2019 15:52:00 -0000
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--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Wed Apr 17 15:52:16 2019
New Revision: 270414
URL: https://gcc.gnu.org/viewcvs?rev=270414&root=gcc&view=rev
Log:
2019-04-17 Martin Jambor <mjambor@suse.cz>
Backport from mainline
2019-03-10 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/85762
PR tree-optimization/87008
PR tree-optimization/85459
* tree-sra.c (contains_vce_or_bfcref_p): New parameter, set the bool
it points to if there is a type changing MEM_REF. Adjust all callers.
(build_accesses_from_assign): Disable total scalarization if
contains_vce_or_bfcref_p returns true through the new parameter, for
both rhs and lhs.
testsuite/
* g++.dg/tree-ssa/pr87008.C: New test.
* gcc.dg/guality/pr54970.c: Xfail tests querying a[0] everywhere.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/tree-ssa/pr87008.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/guality/pr54970.c
branches/gcc-8-branch/gcc/tree-sra.c
>From gcc-bugs-return-641043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:53:39 2019
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Subject: [Bug tree-optimization/85459] [8 Regression] Larger code generated from GMP template meta-programming
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #13 from Martin Jambor <jamborm at gcc dot gnu.org> ---
And fixed on the gcc-8-branch too.
>From gcc-bugs-return-641044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:54:02 2019
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Subject: [Bug tree-optimization/85762] [8/9 Regression] range-v3 abstraction overhead not optimized away
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #11 from Martin Jambor <jamborm at gcc dot gnu.org> ---
And fixed on the gcc-8-branch too.
>From gcc-bugs-return-641045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 15:54:17 2019
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Subject: [Bug tree-optimization/87008] [8 Regression] gimple mem-to-mem assignment badly optimized
Date: Wed, 17 Apr 2019 15:54:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
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--- Comment #13 from Martin Jambor <jamborm at gcc dot gnu.org> ---
And fixed on the gcc-8-branch too.
>From gcc-bugs-return-641046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:02:10 2019
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Subject: [Bug tree-optimization/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Wed, 17 Apr 2019 16:02:00 -0000
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--- Comment #11 from Jeffrey A. Law <law at redhat dot com> ---
That may be an interesting approach. I think we'd want the new blocks created
by threading as well as the original blocks we threaded through since their
in-degree gets reduced which in turn can expose new cprop opportunities.
We'd have to somehow be able to mark or otherwise remember the blocks in
question across a call to cfgcleanup so we'd know what SEME regions to
optimize. But I guess missing one or more regions isn't fatal, it's "just" a
missed optimization.
>From gcc-bugs-return-641047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:10:54 2019
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Wed, 17 Apr 2019 16:10:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to rsandifo@gcc.gnu.org from comment #6)
Thanks for handling this.
> > template<unsigned int N, typename Ca>
> > inline POLY_BINARY_COEFF (Ca, Ca)
> > known_alignment (const poly_int_pod<N, Ca> &a)
> > {
> > typedef POLY_BINARY_COEFF (Ca, Ca) C;
> > C r = a.coeffs[0];
> > for (unsigned int i = 1; i < N; ++i)
> > r |= a.coeffs[i];
> > return r & -r;
> > }
> >
> > The poly_int* stuff makes this much harder to fix, it is unclear if there is
> > some way to get the unsigned type for the C type and use that as r & -(Cuns)
> > r;
> > to avoid the UB, and there is no poly_uint_rtx_p or something to request
> > poly_uint64 from the rtx. Richard?
>
> Changing:
>
> (unsigned HOST_WIDE_INT) known_alignment (const_op0)
>
> to:
>
> known_alignment (poly_uint64 (const_op0))
>
> should work.
That will handle this specific case, I was just hoping that for known_alignment
we could fix all the cases that could be called on poly_int64. For
HOST_WIDE_INT_MIN, do we want known_alignment to return HOST_WIDE_INT_MIN or
something different? It is maximum alignment admittedly only if we are
treating the result as unsigned. Or shall we in known_alignment assert or
compile time assert that it is unsigned and fix all the users?
>From gcc-bugs-return-641048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:15:55 2019
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Wed, 17 Apr 2019 16:15:00 -0000
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--- Comment #8 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #7)
> (In reply to rsandifo@gcc.gnu.org from comment #6)
>
> Thanks for handling this.
>
> > > template<unsigned int N, typename Ca>
> > > inline POLY_BINARY_COEFF (Ca, Ca)
> > > known_alignment (const poly_int_pod<N, Ca> &a)
> > > {
> > > typedef POLY_BINARY_COEFF (Ca, Ca) C;
> > > C r = a.coeffs[0];
> > > for (unsigned int i = 1; i < N; ++i)
> > > r |= a.coeffs[i];
> > > return r & -r;
> > > }
> > >
> > > The poly_int* stuff makes this much harder to fix, it is unclear if there is
> > > some way to get the unsigned type for the C type and use that as r & -(Cuns)
> > > r;
> > > to avoid the UB, and there is no poly_uint_rtx_p or something to request
> > > poly_uint64 from the rtx. Richard?
> >
> > Changing:
> >
> > (unsigned HOST_WIDE_INT) known_alignment (const_op0)
> >
> > to:
> >
> > known_alignment (poly_uint64 (const_op0))
> >
> > should work.
>
> That will handle this specific case, I was just hoping that for
> known_alignment we could fix all the cases that could be called on
> poly_int64. For HOST_WIDE_INT_MIN, do we want known_alignment to return
> HOST_WIDE_INT_MIN or something different? It is maximum alignment
> admittedly only if we are treating the result as unsigned. Or shall we in
> known_alignment assert or compile time assert that it is unsigned and fix
> all the users?
A compile-time assert sounds good. Will try that on top to see how
invasive it ends up being. (Shouldn't be too bad, since there aren't
many callers.)
>From gcc-bugs-return-641049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:30:51 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 17 Apr 2019 16:30:00 -0000
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--- Comment #60 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Jakub Jelinek from comment #59)
> That looks like a D FE bug then.
> In any case, why can't you just use -mgeneral-regs-only on the deh.d
> compilation command line?
Could work, just anxious, that something in comdat segment depends on this
flag.
Another alternative would be to re-factor the code so that
CONTINUE_UNWINDING just returns _URC_CONTINUE_UNWIND,
and _only_ gdc_personality does call __gnu_unwind_frame and has the
@attribute("target", ("general-regs-only")).
>From gcc-bugs-return-641050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:40:24 2019
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
Date: Wed, 17 Apr 2019 16:40:00 -0000
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--- Comment #9 from Ian Lance Taylor <ian at airs dot com> ---
> I think the *end != '\0' check is the problem here. The temporary object is gone at that point.
Ah ha. Thanks.
>From gcc-bugs-return-641051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:41:05 2019
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Subject: [Bug target/89146] arm: "nor" constraint prefers memory reference over constant
Date: Wed, 17 Apr 2019 16:41:00 -0000
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--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> I've looked for constraints that include [ijnIJKLMNO] together with [mo] and
> couldn't find any. So, not really sure what note_invalid_constants is
> supposed to handle (why would reload let a constant get through as constant
> if it required only memory).
GCC simply doesn't know how to deal with architectures that don't have
unlimited offsets from the PC for the constant pool without generating stupidly
bad code. So we run an additional pass late on to fix up constants that aren't
valid by dumping them into 'minipools' that get inlined within the function
code. We do this by using special constraints to handle this, knowing that the
final pass will deal with them.
All *real* patterns in the back-end can deal with this; but this artificial asm
is confusing things. Perhaps for ASM insns we should just skip them entirely
and assume that the user knows what they are doing, but I'm worried that users
might somehow be relying on the existing behaviour.
>From gcc-bugs-return-641052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:43:43 2019
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Subject: [Bug debug/90109] gstabs flag generates wrong entry for long on x86_64
Date: Wed, 17 Apr 2019 16:43:00 -0000
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--- Comment #5 from Jim Wilson <wilson at gcc dot gnu.org> ---
Stabs requires that we emit info for all of the base types at the start. But
if one of the base types does not exist for a 32-bit K&R C target, then we are
struck, as that can't be described. And if we can't describe one or more of
the base types, then we can't safely describe derived types. Currently, we just
lie about the base types we can't describe, which lets us emit debug info for
the derived types that we can describe. It is possible to describe some things
as derived types that can't be described as base types. But if we aren't
allowed to lie about base types, then we probably have to refuse to emit any
debug info at all for the file, which doesn't help.
You can get correct debug info for this testcase if you use
stabs-plus-gdb-extensions. At least until you try to use some language feature
invented in the last decade or two that we never added
stabs-plus-gdb-extensions support for, and then you are screwed again.
Which takes me back to don't use stabs again.
>From gcc-bugs-return-641053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:50:29 2019
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The operand of the decltype specifier is an unevaluated operand and perhaps we
have to take that into account here.
>From gcc-bugs-return-641054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:51:29 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #61 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
At least looking at x86_64-linux gcc/deh.o, I really don't see any .text
comdats, only data comdats, all STT_FUNC symbols are in the same section,
except for the global ctors in .text.startup and dtors in .text.exit.
>From gcc-bugs-return-641055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:53:25 2019
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Subject: [Bug c++/88330] Implement P0542R5, P1289R1, C++20 contract based programming.
Date: Wed, 17 Apr 2019 16:53:00 -0000
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--- Comment #1 from emsr at gcc dot gnu.org ---
I saw this through reddit:
https://gitlab.com/lock3/gcc-new.git branch origin/contracts-jac-kona
This user has several interesting branches of contracts and concepts!
Wiki: http://gummif.github.io/blog/contract_code_gen.html
This Wiki is a 3rd party one.
This is the wiki connected to the repo:
https://gitlab.com/lock3/gcc-new/wikis/contract-assertions
>From gcc-bugs-return-641056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 16:55:31 2019
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
Date: Wed, 17 Apr 2019 16:55:00 -0000
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #6)
> The operand of the decltype specifier is an unevaluated operand and perhaps
> we have to take that into account here.
...i.e., naming of objects does not, by itself, require that a definition be
provided. This should fix it:
--- a/gcc/cp/typeck.c
+++ b/gcc/cp/typeck.c
@@ -2478,6 +2478,7 @@ build_class_member_access_expr (cp_expr object, tree
member,
must: we don't know how to refer to a base member before layout is
complete. But still don't complain in a template. */
if (!dependent_type_p (object_type)
+ && !cp_unevaluated_operand
&& !complete_type_or_maybe_complain (object_type, object,
complain))
return error_mark_node;
>From gcc-bugs-return-641057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 17:06:04 2019
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Subject: [Bug target/90128] 507.cactuBSSN_r is 9-11% slower at -Ofast and native march/tuning on Zen CPUs
Date: Wed, 17 Apr 2019 17:06:00 -0000
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--- Comment #9 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I have only seen this when compiling with -march=native on Zen, but even at -O2
(which I overlooked yesterday, and which is also confirmed by LNT).
>From gcc-bugs-return-641058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 17:20:17 2019
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Subject: [Bug tree-optimization/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
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--- Comment #8 from Walter Landry <wlandry at caltech dot edu> ---
(In reply to Martin Liška from comment #5)
> (In reply to bin cheng from comment #4)
> > Another problem is the generated binary has segment fault issue even
> > compiled O0:
> >
> > $ ./g++ -O0 pr90078.cc -o a.out -ftemplate-depth=1000000 -ftime-report -g
> > -std=c++14
> > $ gdb --args ./a.out
> >
> > Dump of assembler code for function main():
> > 0x0000000000400572 <+0>: push %rbp
> > 0x0000000000400573 <+1>: mov %rsp,%rbp
> > 0x0000000000400576 <+4>: sub $0x2625a020,%rsp
> > 0x000000000040057d <+11>: lea -0x2625a020(%rbp),%rax
> > 0x0000000000400584 <+18>: mov %rax,%rdi
> > => 0x0000000000400587 <+21>: callq 0x4006c0 <Tensor4<float, 100, 100,
> > 100, 100>::Tensor4()>
> > 0x000000000040058c <+26>: lea -0x4c4b410(%rbp),%rax
> > 0x0000000000400593 <+33>: lea -0xe4e1c10(%rbp),%rdx
> >
> > The segment fault happens at the callq instruction.
>
> Yes, same happens also for clang. It's a stack overflow:
That is not surprising. The code recurses 1000 times. I would not consider
crashing at runtime to be a bug.
>From gcc-bugs-return-641059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 17:30:46 2019
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Subject: [Bug bootstrap/90132] New: make bootstrap fails with -O3 (gcc9 snapshot 20190414)
Date: Wed, 17 Apr 2019 17:30:00 -0000
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Bug ID: 90132
Summary: make bootstrap fails with -O3 (gcc9 snapshot 20190414)
Product: gcc
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(I don't know what the correct 'component' is, please adjust as necessary.)
On x86_64 with gcc9 snapshot 20190414 while building c,c++ targets, I noticed
that -O2 works, but -O3 fails with:
checking for vsprintf... checking whether byte ordering is bigendian...
../../gcc-9-20190414/libdecnumber/decNumber.c: In function 'decNumberPower':
cc1: error: '__builtin_memcpy' reading 2 or more bytes from a region of size 0
[-Werror=stringop-overflow=]
yes
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
Date: Wed, 17 Apr 2019 17:32:00 -0000
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--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #7)
> (In reply to Marek Polacek from comment #6)
> > The operand of the decltype specifier is an unevaluated operand and perhaps
> > we have to take that into account here.
>
> ...i.e., naming of objects does not, by itself, require that a definition be
> provided. This should fix it:
>
> --- a/gcc/cp/typeck.c
> +++ b/gcc/cp/typeck.c
> @@ -2478,6 +2478,7 @@ build_class_member_access_expr (cp_expr object, tree
> member,
> must: we don't know how to refer to a base member before layout is
> complete. But still don't complain in a template. */
> if (!dependent_type_p (object_type)
> + && !cp_unevaluated_operand
> && !complete_type_or_maybe_complain (object_type, object,
> complain))
> return error_mark_node;
Looks good.
>From gcc-bugs-return-641061-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 17:35:09 2019
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Thanks -- I just moved the "!cp_unevaluated_operand" check before
dependent_type_p, as that's cheaper. Testing in progress.
>From gcc-bugs-return-641062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 17:37:41 2019
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Subject: [Bug c++/90047] [8/9 Regression] internal compiler error: in finish_expr_stmt, at cp/semantics.c:680
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>From gcc-bugs-return-641063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 17:44:24 2019
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Subject: [Bug target/90125] Typo of AVX512 intrinsics
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>From gcc-bugs-return-641064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 18:09:40 2019
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Subject: [Bug c++/86368] an unknown [[attribute]] should not trigger a warning in C++17
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--- Comment #9 from Justin Bassett <jbassett271 at gmail dot com> ---
After more reflection, I do believe that ignoring attributes from unknown
namespaces is one of the best options.
My suggestion of whitelisting attributes falls apart when we consider how many
attributes there may be. It's not unreasonable to expect that there could be
100s of unknown attributes, or at least around 30. Having to pass 30-100+ flags
to whitelist each of those is not reasonable.
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed Apr 17 18:26:42 2019
New Revision: 270418
URL: https://gcc.gnu.org/viewcvs?rev=270418&root=gcc&view=rev
Log:
PR c++/90124 - bogus error with incomplete type in decltype.
* typeck.c (build_class_member_access_expr): Check
cp_unevaluated_operand.
* g++.dg/cpp0x/decltype70.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/decltype70.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/90124] [9 Regression] Compilation of llvm PDBContext.cpp fails.
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--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-641068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 19:24:46 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90125] Typo of AVX512 intrinsics
Date: Wed, 17 Apr 2019 19:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90125
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 17 19:23:45 2019
New Revision: 270421
URL: https://gcc.gnu.org/viewcvs?rev=270421&root=gcc&view=rev
Log:
PR target/90125
* config/i386/avx512fintrin.h (_mm_maskz_fmadd_round_sd,
_mm_maskz_fmadd_round_ss, _mm_maskz_fmsub_round_sd,
_mm_maskz_fmsub_round_ss, _mm_maskz_fnmadd_round_sd,
_mm_maskz_fnmadd_round_ss, _mm_maskz_fnmsub_round_sd,
_mm_maskz_fnmsub_round_ss): Use _maskz builtin instead of _mask3.
PR target/90125
* gcc.target/i386/avx512f-vfmsubXXXss-2.c (avx512f_test): Adjust
constants to ensure precise result even when not using fma.
* gcc.target/i386/avx512f-vfnmaddXXXss-2.c (avx512f_test): Likewise.
* gcc.target/i386/avx512f-vfmaddXXXsd-3.c: New test.
* gcc.target/i386/avx512f-vfmaddXXXss-3.c: New test.
* gcc.target/i386/avx512f-vfmsubXXXsd-3.c: New test.
* gcc.target/i386/avx512f-vfmsubXXXss-3.c: New test.
* gcc.target/i386/avx512f-vfnmaddXXXsd-3.c: New test.
* gcc.target/i386/avx512f-vfnmaddXXXss-3.c: New test.
* gcc.target/i386/avx512f-vfnmsubXXXsd-3.c: New test.
* gcc.target/i386/avx512f-vfnmsubXXXss-3.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfmaddXXXsd-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfmaddXXXss-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfmsubXXXsd-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfmsubXXXss-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfnmaddXXXsd-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfnmaddXXXss-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfnmsubXXXsd-3.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfnmsubXXXss-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/avx512fintrin.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfmsubXXXss-2.c
trunk/gcc/testsuite/gcc.target/i386/avx512f-vfnmaddXXXss-2.c
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/79183] Hard coded plurals in gimple-ssa-sprintf.c:2050
Date: Wed, 17 Apr 2019 19:24:00 -0000
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Roland Illig <roland.illig at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |roland.illig at gmx dot de
--- Comment #6 from Roland Illig <roland.illig at gmx dot de> ---
Also in gimple-ssa-sprintf.c:
inform (callloc,
(min == 1
? G_("%qE output %wu byte")
: G_("%qE output %wu bytes")),
info.func, min);
inform (callloc,
(min == 1
? G_("%qE output %wu byte into a destination of size %wu")
: G_("%qE output %wu bytes into a destination of size "
"%wu")),
info.func, min, info.objsize);
>From gcc-bugs-return-641070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 19:25:33 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/89325] [7/8/9 Regression] False warnings about "optimization attribute" on operators when -fno-ipa-cp-clone
Date: Wed, 17 Apr 2019 19:25:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 17 19:24:55 2019
New Revision: 270422
URL: https://gcc.gnu.org/viewcvs?rev=270422&root=gcc&view=rev
Log:
PR c++/89325
* g++.dg/ext/attrib58.C: New test.
* g++.dg/ext/attrib59.C: New test.
* g++.dg/ext/attrib60.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ext/attrib58.C
trunk/gcc/testsuite/g++.dg/ext/attrib59.C
trunk/gcc/testsuite/g++.dg/ext/attrib60.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-641069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 19:25:25 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/90125] Typo of AVX512 intrinsics
Date: Wed, 17 Apr 2019 19:25:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC|jakub at redhat dot com |
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-641071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 19:35:12 2019
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Subject: [Bug c++/89953] ICE in nothrow_spec_p, at cp/except.c:1244
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
--- Comment #16 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'll keep poking for now, though I'm not sure what to do.
>From gcc-bugs-return-641072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 19:46:01 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/79183] Hard coded plurals in gimple-ssa-sprintf.c:2050
Date: Wed, 17 Apr 2019 19:46:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46188
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46188&action=edit
gcc9-pr79183.patch
Untested fix for those two cases.
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Subject: [Bug c++/89949] Internal compiler error with lambda as template argument
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This doesn't ICE for me.
>From gcc-bugs-return-641074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 19:54:17 2019
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/89410] [7/8 Regression] ICE in calculate_line_spans, at diagnostic-show-locus.c:1237 after #line
Date: Wed, 17 Apr 2019 19:54:00 -0000
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--- Comment #21 from Jonny Grant <jg at jguk dot org> ---
Hi! In comment 9 I raised if #line 0 could be prevented please
#line next_line_num
So a line can only be >=1 as I understand it.
Editors show files from line 1. There's no line 0
Godbolt can't show the error.. as it prevents showing line 0 that doesn't exist
(files count from 1), and gcc shows the wrong code line highlighted.
#line 0
#error 3
#error hello
#1 with x86-64 gcc (trunk)
<source>: error: #error 3
<source>:1:2: error: #error hello
1 | #line 0
| ^~~~~
Compiler returned: 1
>From gcc-bugs-return-641075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 20:17:26 2019
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Subject: [Bug c/90123] "/usr/include/string.h", line 44: syntax error at token '__dest'
Date: Wed, 17 Apr 2019 20:17:00 -0000
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--- Comment #2 from iris <iris.041619 at gmail dot com> ---
Hi Andrew, thank you so much for your comments!
I tried cproto4.7m and I no longer see these errors.
>From gcc-bugs-return-641076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 20:46:32 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/90132] make bootstrap fails with -O3 (gcc9 snapshot 20190414)
Date: Wed, 17 Apr 2019 20:46:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-17
CC| |msebor at gcc dot gnu.org
Blocks| |88443
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
I can reproduce the warning without -fPIC:
$ (cd /build/gcc-svn-self/libdecnumber && /build/gcc-svn/gcc/xgcc -B
/build/gcc-svn/gcc -I/src/gcc/svn/libdecnumber -I. -O3 -g3 -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
-Wmissing-format-attribute -Wcast-qual -pedantic -Wno-long-long -fno-lto
-I/src/gcc/svn/libdecnumber -I. -S /src/gcc/svn/libdecnumber/decNumber.c)
/src/gcc/svn/libdecnumber/decNumber.c: In function ‘decNumberPower’:
cc1: warning: ‘__builtin_memcpy’ reading 2 or more bytes from a region of size
0 [-Wstringop-overflow=]
$
The variable being read is dnOne:
<bb 94> [local count: 3614127]:
# iftmp.231_443 = PHI <iftmp.231_438(92), iftmp.231_442(93)>
smsup_444 = &dnOne.lsu + iftmp.231_443;
if (&MEM[(void *)&dnOne + 12B] < smsup_444)
goto <bb 95>; [89.00%]
else
goto <bb 97>; [11.00%]
<bb 95> [local count: 3216573]:
_110 = (unsigned long) smsup_444;
_550 = (unsigned long) &MEM[(void *)&dnOne + 12B];
_568 = ~_550;
_525 = _110 + _568;
_524 = _525 >> 1;
_520 = _524 + 1;
_518 = _520 * 2;
__builtin_memcpy (d_434, &MEM[(void *)&dnOne + 12B], _518);
The offset 12 in the MEM_REF corresponds to sizeof (decnumber).
compute_builtin_object_size() returns zero for &MEM[(void *)&dnOne + 12B] and
_518's range is ~[1, 1], so either zero or 2 or more. The warning doesn't
consider the unlikely case of zero and treats the anti-range as [2, SIZE_MAX].
The missing location information suggests the memcpy call is the result of some
transformation. The reference to smsup implies it comes from this loop in
decNumberCopy() (the only function in the translation unit that defines the
smsup variable):
if (src->digits>3) {
const uint16_t *smsup, *s;
uint16_t *d;
d=dest->lsu+1;
smsup=src->lsu+((src->digits)<=49?d2utable[src->digits]:((src->digits)+3
-1)/3);
for (s=src->lsu+1; s<smsup; s++, d++) *d=*s;
}
return dest;
}
The trailing one-element decnumber::lsu array is being used as a flexible-array
member with decnumber::digits corresponding to the number of elements. The
value src->lsu+1 is past the end of the dnOne object but smsup has one of two
values: src->lsu + d2utable[src->digits] or src->lsu + 1, and the first one
doesn't look determinate because dnOne is also used as some sort of a temporary
by decNumberPower and its digits member (initially set to 1) is overwritten.
So the loop gets transformed into memcpy that reads some number other than 1
from an object of size zero.
Adding an assertion like in the otherwise untested patch below should let GCC
see that dnOne.digits is unchanged. I don't know enough about the library to
tell if that's actually correct or what the correct macro or value to use here
might be.
===================================================================
--- libdecnumber/decNumber.c (revision 270418)
+++ libdecnumber/decNumber.c (working copy)
@@ -2188,6 +2188,8 @@ decNumber * decNumberPower(decNumber *res, const d
}
/* [inv now points to big-enough buffer or allocated storage] */
decNumberCopy(inv, dac); /* copy the 1/lhs */
+ if (dnOne.digits > 1)
+ __builtin_unreachable ();
decNumberCopy(dac, &dnOne); /* restore acc=1 */
lhs=inv; /* .. and go forward with new lhs */
#if DECSUBSET
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88443
[Bug 88443] [meta-bug] bogus/missing -Wstringop-overflow warnings
>From gcc-bugs-return-641077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 20:58:45 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/90132] make bootstrap fails with -O3 (gcc9 snapshot 20190414)
Date: Wed, 17 Apr 2019 20:58:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I think the following test case reproduces what's going on in decNumber.c.
Both GCC 8 and 9 issue the warning (IIRC, the warning was added in GCC 7 for
writes but enhanced to reads in GCC 8).
$ cat a.c && gcc -O3 -S -Wall -fdump-tree-optimized=/dev/stdout a.c
struct S
{
int n, a[1];
};
static inline void f (int *d, const struct S *p)
{
const int *e = p->n > 1 ? p->a + p->n : p->a + 1;
for (const int *s = p->a + 1; s < e; ++s, ++d)
*d = *s;
}
void g (struct S*);
void h (int *d)
{
struct S s = { 0 };
g (&s);
f (d, &s);
}
;; Function h (h, funcdef_no=1, decl_uid=1920, cgraph_uid=2, symbol_order=1)
Removing basic block 6
Removing basic block 7
h (int * d)
{
struct S s;
int _6;
long unsigned int _7;
long unsigned int _8;
const int * iftmp.0_9;
unsigned long _15;
unsigned long _16;
sizetype _20;
unsigned long _23;
sizetype _24;
unsigned long _25;
unsigned long _26;
<bb 2> [local count: 118111600]:
s = {};
g (&s);
_6 = s.n;
if (_6 > 1)
goto <bb 3>; [59.00%]
else
goto <bb 5>; [41.00%]
<bb 3> [local count: 69685844]:
_7 = (long unsigned int) _6;
_8 = _7 * 4;
iftmp.0_9 = &s.a + _8;
if (&MEM[(void *)&s + 8B] < iftmp.0_9)
goto <bb 4>; [93.20%]
else
goto <bb 5>; [6.80%]
<bb 4> [local count: 64949629]:
_26 = (unsigned long) iftmp.0_9;
_16 = (unsigned long) &MEM[(void *)&s + 8B];
_15 = ~_16;
_23 = _15 + _26;
_25 = _23 >> 2;
_24 = _25 + 1;
_20 = _24 * 4;
__builtin_memcpy (d_4(D), &MEM[(void *)&s + 8B], _20); [tail call]
<bb 5> [local count: 118111601]:
s ={v} {CLOBBER};
return;
}
a.c: In function ‘h’:
cc1: warning: ‘__builtin_memcpy’ reading 4 or more bytes from a region of size
0 [-Wstringop-overflow=]
>From gcc-bugs-return-641078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 21:02:29 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/89410] [7/8 Regression] ICE in calculate_line_spans, at diagnostic-show-locus.c:1237 after #line
Date: Wed, 17 Apr 2019 21:02:00 -0000
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--- Comment #22 from Segher Boessenkool <segher at gcc dot gnu.org> ---
#line 0 isn't valid C code. If it causes problems we should just
error on it (and perhaps even when it doesn't (yet) cause problems).
>From gcc-bugs-return-641079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 21:11:29 2019
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Subject: [Bug middle-end/7651] Define -Wextra strictly in terms of other warning flags
Date: Wed, 17 Apr 2019 21:11:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
CC| |egallager at gcc dot gnu.org,
| |msebor at gcc dot gnu.org
--- Comment #35 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing Martin Sebor since this bug is relevant to this blog post he wrote:
https://developers.redhat.com/blog/2019/03/13/understanding-gcc-warnings/
(In reply to Manuel López-Ibáñez from comment #16)
> Subject: Bug 7651
>
> Author: manu
> Date: Tue Jan 2 17:33:25 2007
> New Revision: 120347
>
> URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=120347
> Log:
> 2007-01-02 Manuel Lopez-Ibanez <manu@gcc.gnu.org>
>
> PR middle-end/7651
> * c.opt (Wold-style-declaration): New.
> * doc/invoke.texi (C-only Warning Options): New.
> (Wold-style-declaration): Document it.
> (Wextra): Enabled by -Wextra.
> * c-opts.c (c_common_post_options): Enabled by -Wextra.
> * c-decl.c (declspecs_add_scspec): Replace -Wextra with
> -Wold-style-declaration.
>
> testsuite/
> * gcc.dg/declspec-3.c: Replace -W with -Wold-style-declaration.
> * gcc.dg/declspec-3-Wextra.c: New.
> * gcc.dg/declspec-3-no.c: New
>
> Added:
> trunk/gcc/testsuite/gcc.dg/declspec-3-Wextra.c
> trunk/gcc/testsuite/gcc.dg/declspec-3-no.c
> Modified:
> trunk/gcc/ChangeLog
> trunk/gcc/c-decl.c
> trunk/gcc/c-opts.c
> trunk/gcc/c.opt
> trunk/gcc/doc/invoke.texi
> trunk/gcc/testsuite/ChangeLog
> trunk/gcc/testsuite/gcc.dg/declspec-3.c
Would have been nice to have a testcase explicitly named
gcc.dg/Wold-style-declaration.c, too, for easier findability
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Subject: [Bug c++/67906] Missing warning about std::move without effect
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #10 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #8)
> Kinda related: PR 86981
cc-ing Marek since he fixed that
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Subject: [Bug c++/81159] New warning idea: -Wself-move
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing Marek since he wrote a blog post that seems relevant here:
https://developers.redhat.com/blog/2019/04/12/understanding-when-not-to-stdmove-in-c/
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/81159] New warning idea: -Wself-move
Date: Wed, 17 Apr 2019 21:37:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Ok, this shouldn't be too hard. I guess I could implement it for GCC 10.
>From gcc-bugs-return-641083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 21:47:59 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90105] std::forward_list::sort() is not "stable"
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 17 21:47:20 2019
New Revision: 270427
URL: https://gcc.gnu.org/viewcvs?rev=270427&root=gcc&view=rev
Log:
PR libstdc++/90105 make forward_list::sort stable
While testing the fix I also discovered that operator== assumes the
elements are comparable with operator!= which is not required.
PR libstdc++/90105
* include/bits/forward_list.h (operator==): Do not use operator!= to
compare elements.
(forward_list<T, A>::sort(Comp)): When elements are equal take the one
earlier in the list, so that sort is stable.
* testsuite/23_containers/forward_list/operations/90105.cc: New test.
* testsuite/23_containers/forward_list/comparable.cc: Test with
types that meet the minimum EqualityComparable and LessThanComparable
requirements. Remove irrelevant comment.
Added:
trunk/libstdc++-v3/testsuite/23_containers/forward_list/operations/90105.cc
- copied, changed from r270425,
trunk/libstdc++-v3/testsuite/23_containers/forward_list/comparable.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/forward_list.tcc
trunk/libstdc++-v3/testsuite/23_containers/forward_list/comparable.cc
>From gcc-bugs-return-641084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 22:36:44 2019
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Subject: [Bug c++/81159] New warning idea: -Wself-move
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Nikolay Orliuk <virkony at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |virkony at gmail dot com
--- Comment #4 from Nikolay Orliuk <virkony at gmail dot com> ---
Just curious if this code works good with return value optimization like:
static inline T conditional_update(T&& src, bool flag) {
if (flag) {
return T{};
} else {
return std::move(src);
}
}
T a;
a = conditional_update(a, true);
a = conditional_update(a, false);
Is it going to produce warning after inlining and propagating constants?..
>From gcc-bugs-return-641085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 23:13:05 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #79 from fink at snaggledworks dot com ---
(In reply to Iain Sandoe from comment #68)
> Created attachment 46176 [details]
> revised fixincludes patch.
>
> So I have an answer about the language implications.
>
> Any C++ program containing _Atomic is using a reserved identifier, and so is
> "ill-formed no diagnostic required", per [lex.name]/3
>
> Therefore, it's standards-conforming for a [C++] implementation to make such
> identifiers keywords (as GCC does for __attribute__, for example)
>
> Apparently, this is intentional extension and is only one of a longer list
> of such keywords that clang++ accepts.
>
> ====
>
> Since, according to the discussion above, this is not a bug in the compiler
> but rather in using a non-portable extension, perhaps we should not expect
> any change to the headers.
>
> ====
>
> The patch attached include the generated files, and I'd be grateful if folks
> would test it (right now I have limited access to Darwin test boxen, but it
> seems to DTRT for me) - I will post to @patches, but leave commit until it's
> confirmed that it's working.
A little late to the party, but this revised patch worked for me on
10.4.4/Xcode10.2 with gcc8.3.0, gcc7.4.0, and gcc6.5.0. fftw3-3.3.8 built and
passed all tests against the patched gcc8 and gcc7. cernlib built against the
patched gcc6.
>From gcc-bugs-return-641086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 23:16:21 2019
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #80 from Jürgen Reuter <juergen.reuter at desy dot de> ---
> A little late to the party, but this revised patch worked for me on
> 10.4.4/Xcode10.2 with gcc8.3.0, gcc7.4.0, and gcc6.5.0. fftw3-3.3.8 built
> and passed all tests against the patched gcc8 and gcc7. cernlib built
> against the patched gcc6.
Never too late for an important confirmation.^^
LLVM now builds (after solving unrelated PR90124, its tests are running
(45%done). Looks good.
>From gcc-bugs-return-641087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 23:25:15 2019
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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #32 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #26)
> (In reply to Vladimir Makarov from comment #25)
> > (In reply to Peter Bergner from comment #24)
> >> I don't know why r0 isn't in profitable_regs for pseudo 116.
> >
> > Profitable regs there contain also conflict regs. R0 is conflicting with
> > p106. If R0 usage (in call insn) were in the same BB, your new conflict
> > calculation found that there is no actual conflict. But IRA uses
> > df-infrastructure which tells IRA that R0 lives at the BB end where p106
> > occurs.
>
> I'm sorry, but I don't see where p116 conflicts with r0. Can you show me
> where/how? Looking at my IRA dump, I see:
Ok, so there is a bug in print_allocno_conflicts() that causes us to skip
printing the hard reg conflicts if the allocno doesn't have any conflicts with
other allocnos. I submitted a patch to fix that. With the fix, I know see the
following conflict info for p116:
;; a5(r116,l0) conflicts:
;; total conflict hard regs: 0
;; conflict hard regs:
So this explains why p116 isn't assigned r0. That doesn't explain why p116
conflicts with r0 though, because looking at the rtl brlow, it shouldn't:
<r0 is live here>
(insn 50 3 7 2 (set (reg:SI 116)
(reg:SI 0 r0 [ aD.4197 ])) "bug.i":7:1 181 {*arm_movsi_insn}
(nil))
(insn 7 50 8 2 (parallel [
(set (reg:CC 100 cc)
(compare:CC (reg:SI 116)
(const_int 0 [0])))
(set (reg/v:SI 112 [ aD.4197 ])
(reg:SI 116))
]) "bug.i":10:6 188 {*movsi_compare0}
(expr_list:REG_DEAD (reg:SI 116)
(nil)))
<r0 is live here>
So yes, r0 is live at the definition of p116, we know they have the same value.
My ira-conflicts.c changes adding non_conflicting_reg_copy_p() should have
handled that, but it isn't. Now non_conflicting_reg_copy_p() does correctly
notice that insn 50 is a simple copy that we can ignore for conflict purposes,
but somehow, a conflict is still being added.
I tracked the problem down to ira-conflicts.c:make_object_dead() not handling
ignore_reg_for_conflicts correctly. The bug is that we correctly remove the
ignored reg (r0) from OBJECT_CONFLICT_HARD_REGS, but we miss removing it from
OBJECT_TOTAL_CONFLICT_HARD_REGS too. I'm working on a patch.
>From gcc-bugs-return-641088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 17 23:55:00 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #33 from Peter Bergner <bergner at gcc dot gnu.org> ---
Created attachment 46189
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46189&action=edit
Proposed patch
Here is a patch that fixes make_object_dead() that was causing r0 to be
incorrectly added to p116's total_conflict_regs which made it impossible to
assign r0 to p116. With this patch, we now assign r0 to p116 like we want:
;; a5(r116,l0) conflicts:
;; total conflict hard regs:
;; conflict hard regs:
...
Popping a5(r116,l0) -- assign reg 0
Popping a3(r112,l0) -- assign reg 4
Popping a2(r114,l0) -- assign reg 4
Popping a0(r111,l0) -- assign reg 0
Popping a4(r117,l0) -- assign reg 0
Popping a1(r113,l0) -- assign reg 3
Disposition:
0:r111 l0 0 3:r112 l0 4 1:r113 l0 3 2:r114 l0 4
5:r116 l0 0 4:r117 l0 0
Can someone on the ARM side please bootstrap and regtest the patch to see if it
fixes the testsuite fallout? I'll bootstrap and regtest it on power.
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 18 Apr 2019 01:28:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46189|0 |1
is obsolete| |
--- Comment #34 from Peter Bergner <bergner at gcc dot gnu.org> ---
Created attachment 46190
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46190&action=edit
Updated patch
Updated patch that is functionally the same, but I like this one better.
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From: "damian at sourceryinstitute dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90133] New: Linker error if no
Date: Thu, 18 Apr 2019 03:26:00 -0000
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Bug ID: 90133
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The code below compiles cleanly with -fcoarray=single but generates a linker
error when I use -fcoarray=lib and link to MPICH and OpenCoarrays. The linking
problem goes away if the "use" statement and "type(event_type)" declaration are
moved to just after the "associate" statement and wrapped in "block/end block",
which leads me to suspect this might be a gfortran bug rather than an
OpenCoarrays bug.
$ cat link-error.f90
module link_error
contains
subroutine post_event_in_associate
use iso_fortran_env
type(event_type), save :: e[*]
associate( i => 1 )
event post(e[1])
end associate
end
end module
end
$ gfortran \
-I/home/rouson/Desktop/Builds/opt/opencoarrays/2.6.1-b480f1d/gnu/9.0.1/include/OpenCoarrays-2.6.1-14-gb480f1d_GNU-9.0.1
\
-fcoarray=lib \
-Wl,-rpath \
-Wl,/home/rouson/Builds/opt/mpich/3.2/gnu/9.0.1/lib \
-Wl,--enable-new-dtags ${@} \
/home/rouson/Desktop/Builds/opt/opencoarrays/2.6.1-b480f1d/gnu/9.0.1/lib/libcaf_mpi.a
\
/home/rouson/Desktop/Builds/opt/mpich/3.2/gnu/9.0.1/lib/libmpifort.so \
/home/rouson/Desktop/Builds/opt/mpich/3.2/gnu/9.0.1/lib/libmpi.so \
link-error.f90
/tmp/ccU8ZmCw.o: In function `_caf_init.1.3907':
link-error.f90:(.text+0x4d): undefined reference to `caf_token.0.3905'
link-error.f90:(.text+0x5c): undefined reference to `_gfortran_caf_register'
/tmp/ccU8ZmCw.o: In function `__link_error_MOD_post_event_in_associate':
link-error.f90:(.text+0x8b): undefined reference to `caf_token.0.3905'
link-error.f90:(.text+0xae): undefined reference to `_gfortran_caf_event_post'
/tmp/ccU8ZmCw.o: In function `main':
link-error.f90:(.text+0xda): undefined reference to `_gfortran_caf_init'
link-error.f90:(.text+0x104): undefined reference to `_gfortran_caf_finalize'
collect2: error: ld returned 1 exit status
$ gfortran --version
GNU Fortran (GCC) 9.0.1 20190318 (experimental)
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Subject: [Bug c++/90047] [8/9 Regression] internal compiler error: in finish_expr_stmt, at cp/semantics.c:680
Date: Thu, 18 Apr 2019 03:33:00 -0000
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 18 03:32:24 2019
New Revision: 270433
URL: https://gcc.gnu.org/viewcvs?rev=270433&root=gcc&view=rev
Log:
PR c++/90047 - ICE with enable_if alias template.
In order to make alias templates useful for SFINAE we instantiate them under
the prevailing 'complain' argument, so an error encountered while
instantiating during SFINAE context is silent. The problem in this PR comes
when we later look up the erroneous instantiation and don't give an error at
that point. Fixed by not adding an erroneous instantiation to the hash
table, so we instantiate it again when needed and get the error. This
required changes to a number of tests, which previously said "substitution
failed:" with no explanation of what the failure was; now we properly
explain.
* pt.c (tsubst_decl) [TYPE_DECL]: Don't put an erroneous decl in the
hash table when we're in SFINAE context.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-67.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/g++.old-deja/g++.robertl/eb43.C
trunk/libstdc++-v3/testsuite/20_util/duration/arithmetic/dr3050.cc
trunk/libstdc++-v3/testsuite/20_util/from_chars/1_c++20_neg.cc
trunk/libstdc++-v3/testsuite/20_util/from_chars/1_neg.cc
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/assign/auto_ptr_neg.cc
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/assign/shared_ptr_neg.cc
trunk/libstdc++-v3/testsuite/20_util/shared_ptr/cons/unique_ptr_neg.cc
trunk/libstdc++-v3/testsuite/20_util/to_chars/1_neg.cc
trunk/libstdc++-v3/testsuite/20_util/tuple/element_access/get_neg.cc
trunk/libstdc++-v3/testsuite/20_util/unique_ptr/cons/ptr_deleter_neg.cc
trunk/libstdc++-v3/testsuite/20_util/unique_ptr/modifiers/reset_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/deque/requirements/dr438/assign_neg.cc
trunk/libstdc++-v3/testsuite/23_containers/deque/requirements/dr438/constructor_1_neg.cc
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trunk/libstdc++-v3/testsuite/experimental/memory/shared_ptr/cons/pointer_ctor_neg.cc
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
Date: Thu, 18 Apr 2019 04:12:00 -0000
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--- Comment #10 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Thu Apr 18 04:11:22 2019
New Revision: 270434
URL: https://gcc.gnu.org/viewcvs?rev=270434&root=gcc&view=rev
Log:
PR go/90110
compiler: use temporary to avoid early destruction
The code was passing a substr directly to strtol, and then checking
the *end value returned by strtol. But the substr could be destroyed
as soon as strtol returns, making the test of *end invalid.
Also fix an incorrect test of the string index rather than the value.
Fixes https://gcc.gnu.org/PR90110
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/172663
Modified:
trunk/gcc/go/gofrontend/MERGE
trunk/gcc/go/gofrontend/import.cc
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
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Ian Lance Taylor <ian at airs dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Ian Lance Taylor <ian at airs dot com> ---
Fixed, I hope.
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug inline-asm/52813] %rsp in clobber list is silently ignored
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--- Comment #10 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to rsandifo@gcc.gnu.org from comment #8)
> Author: rsandifo
> Date: Tue Jan 15 16:46:54 2019
> New Revision: 267941
>
> URL: https://gcc.gnu.org/viewcvs?rev=267941&root=gcc&view=rev
> Log:
> PR inline-asm/52813 revisited
>
> The original patch for this PR made it an error to list the stack
> pointer in the clobber list of an inline asm. However, the general
> feeling seemed to be that going straight to a hard error was too harsh,
> since there's quite a bit of existing code that has the clobber.
>
> This patch implements the compromise discussed on IRC of making it
> a -Wdeprecated warning instead.
>
> 2019-01-15 Richard Sandiford <richard.sandiford@arm.com>
>
> gcc/
> PR inline-asm/52813
> * doc/extend.texi: Document that listing the stack pointer in the
> clobber list of an asm is a deprecated feature.
> * common.opt (Wdeprecated): Moved from c-family/c.opt.
> * cfgexpand.c (asm_clobber_reg_is_valid): Issue a -Wdeprecated
> warning instead of an error for clobbers of the stack pointer.
> Add a note explaining why.
>
> gcc/c-family/
> PR inline-asm/52813
> * c.opt (Wdeprecated): Move documentation and variable to common.opt.
>
> gcc/d/
> PR inline-asm/52813
> * lang.opt (Wdeprecated): Reference common.opt instead of c.opt.
>
> gcc/testsuite/
> PR inline-asm/52813
> * gcc.target/i386/pr52813.c (test1): Turn the diagnostic into a
> -Wdeprecated warning and expect a following note:.
>
> Modified:
> trunk/gcc/ChangeLog
> trunk/gcc/c-family/ChangeLog
> trunk/gcc/c-family/c.opt
> trunk/gcc/cfgexpand.c
> trunk/gcc/common.opt
> trunk/gcc/d/ChangeLog
> trunk/gcc/d/lang.opt
> trunk/gcc/doc/extend.texi
> trunk/gcc/testsuite/ChangeLog
> trunk/gcc/testsuite/gcc.target/i386/pr52813.c
(In reply to Christophe Lyon from comment #9)
> Author: clyon
> Date: Fri Jan 18 09:57:41 2019
> New Revision: 268066
>
> URL: https://gcc.gnu.org/viewcvs?rev=268066&root=gcc&view=rev
> Log:
> [ARM][testsuite] follow-up to PR target/52813 and target/11807 fix.
>
> 2019-01-18 Christophe Lyon <christophe.lyon@linaro.org>
>
> * gcc.target/arm/pr77904.c: Add dg-warning for sp clobber.
>
>
> Modified:
> trunk/gcc/testsuite/ChangeLog
> trunk/gcc/testsuite/gcc.target/arm/pr77904.c
So after these 2, has this been fixed now?
>From gcc-bugs-return-641095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 05:05:13 2019
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 18 Apr 2019 05:05:00 -0000
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--- Comment #81 from Jürgen Reuter <juergen.reuter at desy dot de> ---
LLVM worked, so I think there are enough green lights now for committing this
fix.
>From gcc-bugs-return-641096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 05:44:55 2019
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Subject: [Bug rtl-optimization/85789] Signed integer overflow with nonzero optimization in cse.c
Date: Thu, 18 Apr 2019 05:44:00 -0000
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--- Comment #1 from Vittorio Zecca <zeccav at gmail dot com> ---
I confirm it is still in trunk 270309, must be compiled with
nonzero optimization
~/local/gcc-270309-undefined/bin/gcc -S -O gccerr67.c
../../gcc/gcc/cse.c:2215:34: runtime error: signed integer overflow: 1 -
-9223372036854775807 cannot be represented in type 'long int'
Bug now moved at line 2215
offset = (get_integer_term (x) - get_integer_term (p->exp));
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Subject: [Bug inline-asm/52813] %rsp in clobber list is silently ignored
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #11 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #10)
> So after these 2, has this been fixed now?
OK for me.
>From gcc-bugs-return-641098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 06:50:24 2019
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Subject: [Bug tree-optimization/90134] New: ICE in duplicate_eh_regions_1, at except.c:557
Date: Thu, 18 Apr 2019 06:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90134
Bug ID: 90134
Summary: ICE in duplicate_eh_regions_1, at except.c:557
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, openmp
Severity: normal
Priority: P3
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g++-9.0.0-alpha20190414 snapshot (r270355), 8.3, 7.4, 6.3 all ICE when
compiling the following testcase w/ -O1 (-O2, -O3, -Ofast)
-fnon-call-exceptions -ftree-parallelize-loops=2 --param
max-loop-header-insns=1 (the last --param is not needed for gcc 6.3):
void
ot ();
struct xv {
int te;
};
class m7 {
public:
~m7 ()
{
for (int za = qr; za < 1; ++za)
{
xv *fq;
if (fq->te == 0)
;
}
try {
ot ();
} catch (...) {
}
}
private:
int qr;
};
m7 n1;
% g++-9.0.0-alpha20190414 -O1 -fnon-call-exceptions -ftree-parallelize-loops=2
--param max-loop-header-insns=1 -c tfl5v9ir.cc
during GIMPLE pass: ompexpssa
tfl5v9ir.cc: In function 'm7___m7._loopfn.0':
tfl5v9ir.cc:12:26: internal compiler error: in duplicate_eh_regions_1, at
except.c:557
12 | for (int za = qr; za < 1; ++za)
| ~~~^~~
0x6b4497 duplicate_eh_regions_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/except.c:557
0xc29281 duplicate_eh_regions_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/except.c:599
0xc29784 duplicate_eh_regions(function*, eh_region_d*, int, tree_node*
(*)(tree_node*, void*), void*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/except.c:628
0xfc4bc1 move_sese_region_to_fn(function*, basic_block_def*, basic_block_def*,
tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/tree-cfg.c:7509
0xe4ab0c expand_omp_taskreg
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/omp-expand.c:1427
0xe51237 expand_omp_synch
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/omp-expand.c:6344
0xe51237 expand_omp
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/omp-expand.c:8189
0xe5305d execute_expand_omp
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/omp-expand.c:8381
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #82 from Iain Sandoe <iains at gcc dot gnu.org> ---
Author: iains
Date: Thu Apr 18 06:53:21 2019
New Revision: 270435
URL: https://gcc.gnu.org/viewcvs?rev=270435&root=gcc&view=rev
Log:
fix PR89864
2019-04-18 Erik Schnetter <schnetter@gmail.com>
Jakub Jelinek <jakub@redhat.com>
Iain Sandoe <iain@sandoe.co.uk>
PR bootstrap/89864
* inclhack.def (darwin_ucred__Atomic): New, work around _Atomic keyword
use in headers included by C++.
* fixincl.x: Regenerated.
Modified:
trunk/fixincludes/ChangeLog
trunk/fixincludes/fixincl.x
trunk/fixincludes/inclhack.def
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Subject: [Bug libstdc++/90135] New: std::map::at incorrectly included in C++03 mode
Date: Thu, 18 Apr 2019 07:01:00 -0000
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Bug ID: 90135
Summary: std::map::at incorrectly included in C++03 mode
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Created attachment 46191
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46191&action=edit
Do not include std::map::at before C++11
This was introduced in C++11:
https://en.cppreference.com/w/cpp/container/map/at
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #83 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Jürgen Reuter from comment #81)
> LLVM worked, so I think there are enough green lights now for committing
> this fix.
yeah, I had a few tests of my own to complete.
So - fixed on trunk
back ports are approved but I will let it bake on trunk for a week or so before
doing them, please leave the PR open until then
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Subject: [Bug go/90110] [9 Regression] libgo fails to build against glibc 2.19
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Ian Lance Taylor from comment #11)
> Fixed, I hope.
Yes.
>From gcc-bugs-return-641103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 07:25:11 2019
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Subject: [Bug libstdc++/90135] std::map::at incorrectly included in C++03 mode
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patches should be sent to the mailing lists, not in bugzilla, but as the
comment indicates, this member function was added to resolve a library defect:
https://wg21.link/lwg464
Generally we resolve defects in all applicable dialects, and so as a defect
against C++03 we applied the fix to C++03 mode.
Changing this now risks breaking code that uses the function, and I don't see
any benefit to doing that. If you don't want to use the function in C++03 code
then don't use it.
>From gcc-bugs-return-641104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 07:28:41 2019
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Subject: [Bug libstdc++/90135] std::map::at incorrectly included in C++03 mode
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
FWIW, these days a proposal to add new member functions would almost certainly
not be handled as a defect report, and would require a proposal to add it to
the next revision of the standard. But things were sometimes done differently a
decade ago, both in the C++ committee and libstdc++.
>From gcc-bugs-return-641105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 07:31:11 2019
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Thu, 18 Apr 2019 07:30:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the assembler error is for code trying to handle
/* Do relax(). */
{
...
/* Most horrible, but gcc may give us some exception data that
is impossible to assemble, of the form
.align 4
.byte 0, 0
.uleb128 end - start
start:
.space 128*128 - 1
.align 4
end:
If the leb128 is two bytes in size, then end-start is 128*128,
which requires a three byte leb128. If the leb128 is three
bytes in size, then end-start is 128*128-1, which requires a
two byte leb128. We work around this dilemma by inserting
an extra 4 bytes of alignment just after the .align. This
works because the data after the align is accessed relative to
the end label.
This counter is used in a tiny state machine to detect
whether a leb128 followed by an align is impossible to
relax. */
...
/* Until nothing further to relax. */
while (stretched && -- max_iterations);
if (stretched)
as_fatal (_("Infinite loop encountered whilst attempting to compute the
addresses of symbols in section %s"),
segment_name (segment));
so it does look like an error on the compiler side. Though maybe
impossible to avoid. I'll try to attach a reproducer.
>From gcc-bugs-return-641106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 07:31:39 2019
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Subject: [Bug libstdc++/90135] std::map::at incorrectly included in C++03 mode
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--- Comment #3 from Andrew Gaul <gcc at gaul dot org> ---
I understand; thank you for sharing this background.
>From gcc-bugs-return-641107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 07:45:56 2019
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Subject: [Bug tree-optimization/90134] ICE in duplicate_eh_regions_1, at except.c:557
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-18
CC| |jakub at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed. With -std=c++14 fails for all releases that support that.
>From gcc-bugs-return-641108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 07:53:41 2019
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46192
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46192&action=edit
preprocessed source
With a cross to rx-elf
> ./configure --enable-languages=c,c++,lto --target=rx-elf --with-newlib --enable-multilib
> make all-gcc
> ./gcc/cc1plus -fpreprocessed valarray.ii -quiet -dumpbase valarray.cc -auxbase-strip valarray.o -g -O2 -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2 -std=gnu++98 -version -fno-implicit-templates -fdiagnostics-show-location=once -frandom-seed=valarray.lo -o valarray.s
> rx-elf-as -m32bit-doubles -mrx-abi -o valarray.o valarray.s
valarray.s: Assembler messages:
valarray.s: Fatal error: Infinite loop encountered whilst attempting to compute
the addresses of symbols in section .text._ZSt15__valarray_copyImEvPKT_mPS0_
trying to reduce that now (the assembly looks innocous).
>From gcc-bugs-return-641109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 08:10:11 2019
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |law at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Reduced C testcase, fails with -O2, succeeds with -O1:
typedef long unsigned int size_t;
void copy(const void* __restrict__ __a, size_t __n, void* __restrict__ __b)
{
if (__n != 0)
__builtin_memcpy(__b, __a, __n);
}
-O2 failing assembly:
.file "valarray.3.ii"
.section P,"ax"
.global _copy
.type _copy, @function
_copy:
mov.L r2, r14
cmp #0, r14
mov.L r1, r2
bne .L7
rts
.balign 8,3,7
.L7:
mov.L r3, r1
mov.L r14, r3
smovf
rts
.size _copy, .-_copy
.ident "GCC: (GNU) 9.0.1 20190418 (experimental) [trunk revision
269411]"
if I remove the .balign it assembles. Knowing nothing about RX I can't
say if this is to be solved in the assembler or the compiler but I note
that GCC 8 didn't align and the only backend change done for GCC 9 was
re-orgs of the *_ALIGN target macro stuff with
2018-07-17 Martin Liska <mliska@suse.cz>
* config/rx/rx.h (JUMP_ALIGN): Wrap integer values
* config/rx/rx-protos.h (rx_align_for_label): Make it
static function.
* config/rx/rx.c (rx_align_for_label): Change return type
to align_flags.
(rx_max_skip_for_label): Remove TARGET_ASM_*_ALIGN_MAX_SKIP
macro definitions.
into align_flags class.
(LABEL_ALIGN): Likewise.
(LOOP_ALIGN): Likewise.
2018-07-04 Denys Vlasenko <dvlasenk@redhat.com>
Martin Liska <mliska@suse.cz>
PR middle-end/66240
PR target/45996
PR c/84100
* config/rx/rx.c (rx_option_override): Likewise.
* config/rx/rx.h (JUMP_ALIGN): Use align_jumps_log.
(LABEL_ALIGN): Use align_labels_log.
(LOOP_ALIGN): Use align_loops_align.
which likely caused this regression.
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
That is, r262804 or more likely r262375 (not yet confirmed). This currently
causes sub-package FAILs for our GCC 9 package builds.
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
That would be mine.
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Martin Liška <marxin at gcc dot gnu.org> changed:
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>From gcc-bugs-return-641113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 08:32:05 2019
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Subject: [Bug d/90136] New: [d] Merge UDAs between function prototype and definitions
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90136
Bug ID: 90136
Summary: [d] Merge UDAs between function prototype and
definitions
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: d
Assignee: ibuclaw at gdcproject dot org
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For two function declarations that have identical signatures (there's no
mismatched nothrow/pure/@nogc/...) any user defined attributes applied to one
should be merged with the other.
Given:
@("foo")
void bar(ref double[4]);
void bar(ref double[4] a)
{
foreach (ref b; a)
b += 42;
}
This is important for one use of the gcc.attribute module.
static if (GNU_ARM_EABI_Unwinder)
{
@attribute("target", ("general-regs-only"))
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
_Unwind_Context* context);
}
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #62 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Bernd Edlinger from comment #55)
> But, how about that:
>
The gcc.attribute module just reuses the UDA mechanism, the value after @ can
be any kind of compile-time evaluated tuple or literal.
So you can do instead. if it makes things much nicer for you.
static if (GNU_ARM_EABI_Unwinder)
enum personality_fn_attributes = attribute("target", ("general-regs-only"))
else
enum personality_fn_attributes = "";
@personality_fn_attributes
private _Unwind_Reason_Code __gdc_personality(...)
>From gcc-bugs-return-641116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 08:40:14 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #63 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Jakub Jelinek from comment #59)
> That looks like a D FE bug then.
That shouldn't be difficult, I've create PR d/90136 to keep track of that.
>From gcc-bugs-return-641117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 08:45:59 2019
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Subject: [Bug bootstrap/90132] make bootstrap fails with -O3 (gcc9 snapshot 20190414)
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I guess the basic issue again that we warn for unreachable code. Note
libdecnumber is barely maintained and quite a big mess...
>From gcc-bugs-return-641118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 09:02:47 2019
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Subject: [Bug debug/90131] wrong debug info at -O3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-18
Version|unknown |9.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is mergephi at work:
@@ -101,14 +45,10 @@
if (i_5 != 9)
goto <bb 3>; [90.00%]
else
- goto <bb 5>; [10.00%]
-
- <bb 5> [local count: 107374183]:
- # DEBUG i => NULL
- # DEBUG i => 0
+ goto <bb 6>; [10.00%]
<bb 6> [local count: 160259975]:
- # d_21 = PHI <0(5), 1(8)>
+ # d_21 = PHI <0(4), 1(8)>
# DEBUG d => NULL
# DEBUG d => d_21
if (d_21 == 0)
where remove_forwarder_block_with_phi doesn't bother to move debug stmts
as the fixed CFG cleanup copy tried and now does conservatively.
>From gcc-bugs-return-641119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 10:21:07 2019
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Subject: [Bug c++/90137] New: Using declaration (constructor inheritance) prevents overriding
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90137
Bug ID: 90137
Summary: Using declaration (constructor inheritance) prevents
overriding
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: kshegunov at gmail dot com
Target Milestone: ---
Created attachment 46193
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46193&action=edit
A complete source code to reproduce
Hello,
When inheriting constructors from a base class with a virtual destructor and
overriding the destructor, the compiler doesn't hide from lookup the generated
destructor call (as per rules for using declarations). This causes failed
compilation on object instantiation for the following simple program (attached
a MWE):
#include <memory>
class Base
{
public:
Base(int = 0);
virtual ~Base();
};
class DerivedPrivate;
class Derived final : public Base
{
public:
using Base::Base;
~Derived() override;
private:
std::unique_ptr<DerivedPrivate> d;
};
DerivedPrivate is obviously only forward declared, and the inline destructor
for the std::unique_ptr instance can't be generated at the point of
declaration, however the destructor of Derived is overriden and defined in the
source file and the call to the member destructor should be emitted there.
Substituting the using declaration with a trivial class constructor that
delegates to the base class solves the issue and compiles as expected.
-------------------------
Diagnostic information:
GCC version:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-6'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.3.0 (Debian 8.3.0-6)
Compiling with:
g++ -c -pipe -g -std=gnu++11 -Wall -W -Wextra -fPIC -I. -o main.o main.cpp
Results in:
In file included from /usr/include/c++/8/memory:80,
from ../gcc-bug/using.h:4,
from ../gcc-bug/main.cpp:1:
/usr/include/c++/8/bits/unique_ptr.h: In instantiation of ‘void
std::default_delete<_Tp>::operator()(_Tp*) const [with _Tp = DerivedPrivate]’:
/usr/include/c++/8/bits/unique_ptr.h:274:17: required from
‘std::unique_ptr<_Tp, _Dp>::~unique_ptr() [with _Tp = DerivedPrivate; _Dp =
std::default_delete<DerivedPrivate>]’
../gcc-bug/using.h:14:7: required from here
/usr/include/c++/8/bits/unique_ptr.h:79:16: error: invalid application of
‘sizeof’ to incomplete type ‘DerivedPrivate’
static_assert(sizeof(_Tp)>0,
^~~~~~~~~~~
Expected result:
Successful compilation.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90137] Using declaration (constructor inheritance) prevents overriding
Date: Thu, 18 Apr 2019 10:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90137
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-18
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It works for me with FSF GCC 8.3.0. The attached testcase instead emits
> /space/rguenther/install/gcc-8.3/bin/g++ main.cpp -I. -S -std=gnu++11 -g -Wall -W -Wextra -fPIC
In file included from
/home/space/rguenther/install/gcc-8.3/include/c++/8.3.0/memory:80,
from using.h:4,
from main.cpp:1:
/home/space/rguenther/install/gcc-8.3/include/c++/8.3.0/bits/unique_ptr.h: In
instantiation of ‘void std::default_delete<_Tp>::operator()(_Tp*) const [with
_Tp = DerivedPrivate]’:
/home/space/rguenther/install/gcc-8.3/include/c++/8.3.0/bits/unique_ptr.h:274:17:
required from ‘std::unique_ptr<_Tp, _Dp>::~unique_ptr() [with _Tp =
DerivedPrivate; _Dp = std::default_delete<DerivedPrivate>]’
using.h:14:7: required from here
/home/space/rguenther/install/gcc-8.3/include/c++/8.3.0/bits/unique_ptr.h:79:16error:
invalid application of ‘sizeof’ to incomplete type ‘DerivedPrivate’
static_assert(sizeof(_Tp)>0,
^~~~~~~~~~~
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/79183] Hard coded plurals in gimple-ssa-sprintf.c:2050
Date: Thu, 18 Apr 2019 10:28:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 18 10:28:21 2019
New Revision: 270438
URL: https://gcc.gnu.org/viewcvs?rev=270438&root=gcc&view=rev
Log:
PR translation/79183
* gimple-ssa-sprintf.c (format_directive): Use inform_n instead of
inform where appropriate.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/cp/decl.c
trunk/gcc/gimple-ssa-sprintf.c
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From: "kshegunov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90137] Using declaration (constructor inheritance) prevents overriding
Date: Thu, 18 Apr 2019 10:40:00 -0000
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--- Comment #2 from Konstantin Shegunov <kshegunov at gmail dot com> ---
Yes, this is the error I get.
What should happen instead is that compilation succeeds. Having the following
as declaration in using.h:
class DerivedPrivate;
class Derived final : public Base
{
public:
Derived(); // using Base::Base;
~Derived() override;
private:
std::unique_ptr<DerivedPrivate> d;
};
And trivially defining it in using.cpp:
Derived::Derived()
{
}
compiles correctly, i.e.
g++ -c -pipe -g -std=gnu++11 -Wall -W -fPIC -I. -o main.o main.cpp
produces no error.
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Subject: [Bug bootstrap/90132] make bootstrap fails with -O3 (gcc9 snapshot 20190414)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Plus when using non-standard compilation flags during bootstrap
--disable-werror should be used, we only support no warnings for the default
set of flags and normal and profiledbootstrap (not sure about lto bootstraps).
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://sourceware.org/bugz
| |illa/show_bug.cgi?id=24464
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I created a binutils bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=24464
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 18 Apr 2019, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90045
>
> Martin Liška <marxin at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> See Also| |https://sourceware.org/bugz
> | |illa/show_bug.cgi?id=24464
>
> --- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
> I created a binutils bug:
> https://sourceware.org/bugzilla/show_bug.cgi?id=24464
But compiler behavior changed from GCC 8 -> 9 with your changes.
I do not think that the .balign is desired (I guess the backend
doesn't properly take that into account when choosing jump form).
Do you understand why your changes caused this change in behavior?
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Subject: [Bug c++/90138] New: ICE on invalid in contains_struct_check()
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Bug ID: 90138
Summary: ICE on invalid in contains_struct_check()
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
r270434 --enable-checking=release not ICE
r270435 --enable-checking=yes,df,fold,rtl,extra ICE
$ cat x_2.ii
template <, typename a, typename typename, typename a,
$ g++ -fpreprocessed -fsyntax-only -c a.ii^C
[dimhen:dim ice]$ cat x_2.ii
template <, typename a, typename typename, typename a,[dimhen:dim ice]$ cat
x_2.ii
[dimhen:dim ice]$ /usr/local/gcc_current/bin/g++ -fpreprocessed -fsyntax-only
-c x_2.ii
x_2.ii:1:11: error: expected identifier before ‘,’ token
1 | template <, typename a, typename typename, typename a,
| ^
x_2.ii:1:34: error: expected nested-name-specifier before ‘typename’
1 | template <, typename a, typename typename, typename a,
| ^~~~~~~~
x_2.ii:1:42: error: expected nested-name-specifier before ‘,’ token
1 | template <, typename a, typename typename, typename a,
| ^
x_2.ii:1:42: error: two or more data types in declaration of ‘parameter’
x_2.ii:1:54: error: expected identifier at end of input
1 | template <, typename a, typename typename, typename a,
| ^
x_2.ii:1:54: internal compiler error: Segmentation fault
0x11f6bdf crash_signal
/home/dimhen/src/gcc_current/gcc/toplev.c:326
0x7f69746b55ff ???
/usr/src/debug/glibc-2.28-95-g7423da211d/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0xc1a517 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
/home/dimhen/src/gcc_current/gcc/tree.h:3289
0xc1a517 process_template_parm(tree_node*, unsigned int, tree_node*, bool,
bool)
/home/dimhen/src/gcc_current/gcc/cp/pt.c:4345
0xbfab99 cp_parser_template_parameter_list
/home/dimhen/src/gcc_current/gcc/cp/parser.c:15642
0xc01694 cp_parser_explicit_template_declaration
/home/dimhen/src/gcc_current/gcc/cp/parser.c:28091
0xc01694 cp_parser_template_declaration_after_export
/home/dimhen/src/gcc_current/gcc/cp/parser.c:28125
0xc041f9 cp_parser_declaration
/home/dimhen/src/gcc_current/gcc/cp/parser.c:13187
0xc0484f cp_parser_translation_unit
/home/dimhen/src/gcc_current/gcc/cp/parser.c:4701
0xc0484f c_parse_file()
/home/dimhen/src/gcc_current/gcc/cp/parser.c:41181
0xd0b1fb c_common_parse_file()
/home/dimhen/src/gcc_current/gcc/c-family/c-opts.c:1156
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ /usr/local/gcc_current/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc_current/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-checking=yes,df,fold,rtl,extra
--enable-languages=c,c++,lto --disable-multilib --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-offload-targets=nvptx-none
--without-cuda-driver --enable-gnu-indirect-function --with-tune=native
Thread model: posix
gcc version 9.0.1 20190418 (experimental) [trunk revision 270435] (GCC)
>From gcc-bugs-return-641127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 11:45:44 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90138] ICE on invalid in contains_struct_check()
Date: Thu, 18 Apr 2019 11:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90138
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-18
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reproduces also with
template <, typename T, typename typename, typename T>
struct S;
>From gcc-bugs-return-641128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 11:57:26 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Thu, 18 Apr 2019 11:57:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, passing -relax to the assembler makes it assemble OK, producing
Disassembly of section P:
00000000 <_copy>:
0: ef 2e mov.l r2, r14
2: 61 0e cmp #0, r14
4: ef 12 mov.l r1, r2
6: 21 0a bne.b 10 <.L7>
8: 02 rts
9: fd 70 40 00 00 00 80 nop ; max #0x80000000, r0
00000010 <.L7>:
10: ef 31 mov.l r3, r1
12: ef e3 mov.l r14, r3
14: 7f 8f smovf
16: 02 rts
17: 03 nop
likewise writing bne.b instead of bne in the assembly. That's odd
since w/o the .balign and without -relax gas produces the same:
00000000 <_copy>:
0: ef 2e mov.l r2, r14
2: 61 0e cmp #0, r14
4: ef 12 mov.l r1, r2
6: 21 03 bne.b 9 <_copy+0x9>
8: 02 rts
9: ef 31 mov.l r3, r1
b: ef e3 mov.l r14, r3
d: 7f 8f smovf
f: 02 rts
>From gcc-bugs-return-641129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 11:58:27 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90138] [7/8/9 Regression] ICE on invalid in contains_struct_check()
Date: Thu, 18 Apr 2019 11:58:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Target Milestone|--- |9.0
Summary|ICE on invalid in |[7/8/9 Regression] ICE on
|contains_struct_check() |invalid in
| |contains_struct_check()
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
ICE started most likely with r117118 (r117114 was still ok).
>From gcc-bugs-return-641130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 12:01:19 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Thu, 18 Apr 2019 12:01:00 -0000
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--- Comment #9 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #7)
> On Thu, 18 Apr 2019, marxin at gcc dot gnu.org wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90045
> >
> > Martin Liška <marxin at gcc dot gnu.org> changed:
> >
> > What |Removed |Added
> > ----------------------------------------------------------------------------
> > See Also| |https://sourceware.org/bugz
> > | |illa/show_bug.cgi?id=24464
> >
> > --- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
> > I created a binutils bug:
> > https://sourceware.org/bugzilla/show_bug.cgi?id=24464
>
> But compiler behavior changed from GCC 8 -> 9 with your changes.
> I do not think that the .balign is desired (I guess the backend
> doesn't properly take that into account when choosing jump form).
Yes, the change was not 1:1, there are some differences.
>
> Do you understand why your changes caused this change in behavior?
Yes, first before my first commit r262374, rx was the only target that defined:
gcc/config/rx/rx.c:#define TARGET_LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP
rx_max_skip_for_label
However in final.c:
944 if (rtx_code_label *label = dyn_cast <rtx_code_label *> (insn))
945 {
946 /* Merge in alignments computed by compute_alignments. */
947 log = LABEL_TO_ALIGNMENT (label);
948 if (max_log < log)
949 {
950 max_log = log;
951 max_skip = LABEL_TO_MAX_SKIP (label);
952 }
953
954 rtx_jump_table_data *table = jump_table_for_label (label);
955 if (!table)
956 {
957 log = LABEL_ALIGN (label);
958 if (max_log < log)
959 {
960 max_log = log;
961 max_skip = targetm.asm_out.label_align_max_skip
(label);
962 }
963 }
964 /* ADDR_VECs only take room if read-only data goes into the
text
965 section. */
966 if ((JUMP_TABLES_IN_TEXT_SECTION
967 || readonly_data_section == text_section)
968 && table)
969 {
970 log = ADDR_VEC_ALIGN (table);
971 if (max_log < log)
972 {
973 max_log = log;
974 max_skip = targetm.asm_out.label_align_max_skip
(label);
975 }
976 }
977 LABEL_TO_ALIGNMENT (label) = max_log;
978 LABEL_TO_MAX_SKIP (label) = max_skip;
979 max_log = 0;
980 max_skip = 0;
981 }
982 else if (BARRIER_P (insn))
983 {
984 rtx_insn *label;
985
986 for (label = insn; label && ! INSN_P (label);
987 label = NEXT_INSN (label))
988 if (LABEL_P (label))
989 {
990 log = LABEL_ALIGN_AFTER_BARRIER (insn);
991 if (max_log < log)
992 {
993 max_log = log;
994 max_skip =
targetm.asm_out.label_align_after_barrier_max_skip (label);
995 }
996 break;
997 }
998 }
The call at 994 didn't call rx_max_skip_for_label (which would return 1), but
default_label_align_after_barrier_max_skip
was called and returned 0. So max_skip is 0. Then at 948 we don't adjust
max_skip as max_log == log.
So that we end up with max_log == 3 and max_skip == 0 and so that no .balign is
used.
For current trunk, TARGET_LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP is gone and the
code looks as follows:
878 if (rtx_code_label *label = dyn_cast <rtx_code_label *> (insn))
879 {
880 /* Merge in alignments computed by compute_alignments. */
881 align_flags alignment = LABEL_TO_ALIGNMENT (label);
882 max_alignment = align_flags::max (max_alignment, alignment);
883
884 rtx_jump_table_data *table = jump_table_for_label (label);
885 if (!table)
886 {
887 align_flags alignment = LABEL_ALIGN (label);
888 max_alignment = align_flags::max (max_alignment,
alignment);
889 }
890 /* ADDR_VECs only take room if read-only data goes into the
text
891 section. */
892 if ((JUMP_TABLES_IN_TEXT_SECTION
893 || readonly_data_section == text_section)
894 && table)
895 {
896 align_flags alignment = align_flags (ADDR_VEC_ALIGN
(table));
897 max_alignment = align_flags::max (max_alignment,
alignment);
898 }
899 LABEL_TO_ALIGNMENT (label) = max_alignment;
900 max_alignment = align_flags ();
901 }
902 else if (BARRIER_P (insn))
903 {
904 rtx_insn *label;
905
906 for (label = insn; label && ! INSN_P (label);
907 label = NEXT_INSN (label))
908 if (LABEL_P (label))
909 {
910 align_flags alignment
911 = align_flags (LABEL_ALIGN_AFTER_BARRIER (insn));
912 max_alignment = align_flags::max (max_alignment,
alignment);
913 break;
914 }
915 }
Where at 912 we have (log=3, maxskip=1), and then we merge it at 882 with
(log=3, maxskip=7) and
we end up with (3,7).
Yes, I can confirm that with current trunk we make a bigger alignment. But
still, gas should not fail.
>From gcc-bugs-return-641131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 12:03:05 2019
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Subject: [Bug debug/90131] wrong debug info at -O3
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 9.
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 18 12:02:40 2019
New Revision: 270441
URL: https://gcc.gnu.org/viewcvs?rev=270441&root=gcc&view=rev
Log:
2019-04-18 Richard Biener <rguenther@suse.de>
PR debug/90131
* tree-cfgcleanup.c (move_debug_stmts_from_forwarder): Split
out from ...
(remove_forwarder_block): ... here.
(remove_forwarder_block_with_phi): Also move debug stmts here.
* gcc.dg/guality/pr90131.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/guality/pr90131.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfgcleanup.c
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Thu, 18 Apr 2019 12:11:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
So it looks like gas does without -relax simply use bne.s which when used
explicitely results in
valarray.s: Assembler messages:
valarray.s:9: Error: jump not 3..10 bytes away (is 2)
a bne.s is one byte large while a bne.b is two bytes. Still not sure why
gas chooses bne.b when no .balign is present but not when it is. Possibly
because when fixing up from bne.s to bne.b the variant with .balign now
suddenly needs to insert nops to fulfill the requested alignment
(with bne.s the .balign is a no-op).
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Iff 'bne' is supposed to auto-"relax" then it is a GAS issue indeed.
Target maintainers?
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Thu, 18 Apr 2019 12:16:00 -0000
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--- Comment #64 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Okay, using Ian's suggestion I've got this now:
Index: libphobos/libdruntime/gcc/deh.d
===================================================================
--- libphobos/libdruntime/gcc/deh.d (revision 270395)
+++ libphobos/libdruntime/gcc/deh.d (working copy)
@@ -28,6 +28,7 @@
import gcc.unwind.pe;
import gcc.builtins;
import gcc.config;
+import gcc.attribute;
extern(C)
{
@@ -519,10 +520,19 @@
terminate("unwind error", __LINE__);
}
+static if (GNU_ARM_EABI_Unwinder)
+{
+ enum personality_fn_attributes = attribute("target",
("general-regs-only"));
+}
+else
+{
+ enum personality_fn_attributes = "";
+}
/**
* Read and extract information from the LSDA (.gcc_except_table section).
*/
+@personality_fn_attributes
_Unwind_Reason_Code scanLSDA(const(ubyte)* lsda, _Unwind_Exception_Class
exceptionClass,
_Unwind_Action actions, _Unwind_Exception*
unwindHeader,
_Unwind_Context* context, _Unwind_Word cfa,
@@ -772,6 +782,7 @@
* Called when the personality function has found neither a cleanup or
handler.
* To support ARM EABI personality routines, that must also unwind the stack.
*/
+@personality_fn_attributes
_Unwind_Reason_Code CONTINUE_UNWINDING(_Unwind_Exception* unwindHeader,
_Unwind_Context* context)
{
static if (GNU_ARM_EABI_Unwinder)
@@ -814,6 +825,7 @@
static if (GNU_ARM_EABI_Unwinder)
{
pragma(mangle, PERSONALITY_FUNCTION)
+ @personality_fn_attributes
extern(C) _Unwind_Reason_Code gdc_personality(_Unwind_State state,
_Unwind_Exception*
unwindHeader,
_Unwind_Context* context)
@@ -873,6 +885,7 @@
}
}
+@personality_fn_attributes
private _Unwind_Reason_Code __gdc_personality(_Unwind_Action actions,
_Unwind_Exception_Class
exceptionClass,
_Unwind_Exception* unwindHeader,
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #35 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Peter's patch solves this particular problem, but not the PR unfortunately.
I finally understand Jakub's comment 30. This patch solves the PR (also
without Peter's patch):
===
diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index 0aecd03..67dddb2 100644
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -6340,7 +6340,7 @@ (define_insn "*movsi_compare0"
(const_int 0)))
(set (match_operand:SI 0 "s_register_operand" "=r,r")
(match_dup 1))]
- "TARGET_32BIT"
+ "TARGET_32BIT && reload_completed"
"@
cmp%?\\t%0, #0
subs%?\\t%0, %1, #0"
===
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #36 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #35)
> Peter's patch solves this particular problem, but not the PR unfortunately.
>
> I finally understand Jakub's comment 30. This patch solves the PR (also
> without Peter's patch):
>
> ===
> diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
> index 0aecd03..67dddb2 100644
> --- a/gcc/config/arm/arm.md
> +++ b/gcc/config/arm/arm.md
> @@ -6340,7 +6340,7 @@ (define_insn "*movsi_compare0"
> (const_int 0)))
> (set (match_operand:SI 0 "s_register_operand" "=r,r")
> (match_dup 1))]
> - "TARGET_32BIT"
> + "TARGET_32BIT && reload_completed"
> "@
> cmp%?\\t%0, #0
> subs%?\\t%0, %1, #0"
> ===
And what about all the cases where the move and compare are not adjacent in the
instruction stream so don't get matched by peepholing?
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 18 Apr 2019 12:26:00 -0000
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--- Comment #84 from Zaak <zbeekman at gmail dot com> ---
Ian, Jurgen, et al.,
Thanks for your hard work getting the patch created and validated!
I'm a mac Homebrew maintainer, and was hoping to get a patch into the GCC-8
formula sooner rather than later as this Xcode regression makes building
certain software e.g., libMesh[1], MOOSE[2] impossible (or difficult, requiring
patching that might be breaking things).
Is there a patch somewhere that resolves this and will apply cleanly to a GCC
8.3 tarball? I'd like to test the backport, and get the patch ready to include
in brewed GCCs.
If I revision bump the formula after including the patch, our CI system will
rebuild all dependent formulae which should be quite a thorough validation of
the patch.
Apologies if an 8.3 patch went by already, if so, please point me in the right
direction.
Cheers!
-Izaak "Zaak" Beekman
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
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--- Comment #9 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Apr 18 12:29:56 2019
New Revision: 270442
URL: https://gcc.gnu.org/viewcvs?rev=270442&root=gcc&view=rev
Log:
Fix two ubsan failures (PR85164)
Two fixes for UB when handling very large offsets. The calculation in
force_int_to_mode would have been correct if signed integers used modulo
arithmetic, so just switch to unsigned types. The calculation in
rtx_addr_can_trap_p_1 didn't handle overflow properly, so switch to
known_subrange_p instead (which is supposed to handle all cases).
2019-04-18 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR middle-end/85164
* combine.c (force_int_to_mode): Cast the argument rather than
the result of known_alignment.
* rtlanal.c (rtx_addr_can_trap_p_1): Use known_subrange_p.
gcc/testsuite/
PR middle-end/85164
* gcc.dg/pr85164-1.c, gcc.dg/pr85164-2.c: New tests.
Added:
trunk/gcc/testsuite/gcc.dg/pr85164-1.c
trunk/gcc/testsuite/gcc.dg/pr85164-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
trunk/gcc/rtlanal.c
trunk/gcc/testsuite/ChangeLog
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Thu, 18 Apr 2019 12:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85164
--- Comment #10 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Thu Apr 18 12:30:36 2019
New Revision: 270443
URL: https://gcc.gnu.org/viewcvs?rev=270443&root=gcc&view=rev
Log:
Fix UB in int_const_binop
When testing PR 85164, the baseline bootstrap-ubsan results had
a lot of failures from int_const_binop. This is because with the
new overflow handling we can sometimes do:
poly_res = res;
on an uninitialised res.
2019-04-18 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* fold-const.c (int_const_binop): Return early on failure.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
>From gcc-bugs-return-641141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 12:35:49 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 18 Apr 2019 12:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87871
--- Comment #37 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Yes, it is a balancing act. Which option works better?
>From gcc-bugs-return-641142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 12:52:56 2019
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Subject: [Bug middle-end/90139] New: ICE in emit_block_move_hints, at expr.c:1601
Date: Thu, 18 Apr 2019 12:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90139
Bug ID: 90139
Summary: ICE in emit_block_move_hints, at expr.c:1601
Product: gcc
Version: 9.0
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CC: ebotcazou at gcc dot gnu.org
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Target: sparc*-sun-solaris2.11
Created attachment 46194
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46194&action=edit
reduced testcase
The following reduced testcase ICEs on trunk:
$ ./xg++ -B./ -S -m64 -O skcms.ii
during RTL pass: expand
skcms.ii: In function ‘void m()’:
skcms.ii:7:6: internal compiler error: in emit_block_move_hints, at expr.c:1601
7 | void m() {
| ^
0x9a8f4f emit_block_move_hints(rtx_def*, rtx_def*, rtx_def*, block_op_methods,
unsigned int, long long, unsigned long long, unsigned long long, unsigned long
long)
/vol/gcc/src/hg/trunk/local/gcc/expr.c:1601
0x9a9043 emit_block_move(rtx_def*, rtx_def*, rtx_def*, block_op_methods)
/vol/gcc/src/hg/trunk/local/gcc/expr.c:1655
0xe8dd23 emit_partition_copy
/vol/gcc/src/hg/trunk/local/gcc/tree-outof-ssa.c:226
0xe8dd23 insert_part_to_rtx_on_edge
/vol/gcc/src/hg/trunk/local/gcc/tree-outof-ssa.c:391
0xe8dd23 elim_create
/vol/gcc/src/hg/trunk/local/gcc/tree-outof-ssa.c:677
0xe8dd23 eliminate_phi
/vol/gcc/src/hg/trunk/local/gcc/tree-outof-ssa.c:735
0xe8dd23 expand_phi_nodes(ssaexpand*)
/vol/gcc/src/hg/trunk/local/gcc/tree-outof-ssa.c:988
0x84bd23 execute
/vol/gcc/src/hg/trunk/local/gcc/cfgexpand.c:6486
While the original testcase shows the same ICE back to gcc 5, this one also
ICEs on mainline.
>From gcc-bugs-return-641143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:05:06 2019
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Subject: [Bug c++/90138] [7/8/9 Regression] ICE on invalid in contains_struct_check()
Date: Thu, 18 Apr 2019 13:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46195
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46195&action=edit
gcc9-pr90138.patch
Untested fix. If pushdecl finds a duplicate decl, it ggc_frees the passed in
decl, so better check the return value of pushdecl...
>From gcc-bugs-return-641144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:08:16 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #38 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #37)
> Yes, it is a balancing act. Which option works better?
Well the question really is what is bad about movsi_compare0 that could be
easily fixed?
The move is for free so there is no need for the "r,0" variant in principle, so
if that helps reducing constraints on register allocation then we could remove
or reorder that alternative.
>From gcc-bugs-return-641146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:24:56 2019
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/80820] _mm_set_epi64x shouldn't store/reload for -mtune=haswell, Zen should avoid store/reload, and generic should think about it.
Date: Thu, 18 Apr 2019 13:24:00 -0000
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Bug 80820 depends on bug 81616, which changed state.
Bug 81616 Summary: Update -mtune=generic for the current Intel and AMD processors
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81616
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>From gcc-bugs-return-641145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:24:54 2019
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Subject: [Bug target/81616] Update -mtune=generic for the current Intel and AMD processors
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
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--- Comment #54 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Yep, I think we could declare this as fixed.
The cost tuning seems to work reasonably well for cores and zens.
>From gcc-bugs-return-641148-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:25:40 2019
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From: "fink at snaggledworks dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 18 Apr 2019 13:25:00 -0000
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--- Comment #85 from fink at snaggledworks dot com ---
(In reply to Zaak from comment #84)
> Ian, Jurgen, et al.,
>
> Thanks for your hard work getting the patch created and validated!
>
> I'm a mac Homebrew maintainer, and was hoping to get a patch into the GCC-8
> formula sooner rather than later as this Xcode regression makes building
> certain software e.g., libMesh[1], MOOSE[2] impossible (or difficult,
> requiring patching that might be breaking things).
>
> Is there a patch somewhere that resolves this and will apply cleanly to a
> GCC 8.3 tarball? I'd like to test the backport, and get the patch ready to
> include in brewed GCCs.
>
> If I revision bump the formula after including the patch, our CI system will
> rebuild all dependent formulae which should be quite a thorough validation
> of the patch.
>
> Apologies if an 8.3 patch went by already, if so, please point me in the
> right direction.
>
> Cheers!
> -Izaak "Zaak" Beekman
Zaak,
I have patches for Fink for gcc5-gcc8 release tarballs. I'm waiting for the
gcc5 build to finish before I make a public commit, which should be tonight.
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Subject: [Bug translation/90118] Missing space between words
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #2 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 46196
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46196&action=edit
Patch proposal
>From gcc-bugs-return-641149-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:28:00 2019
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Subject: [Bug translation/90118] Missing space between words
Date: Thu, 18 Apr 2019 13:27:00 -0000
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--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Sorry Martin I didn't noticed you were looking at this PR.
I've attached a small patch that checks whether %< has a "word" character
immediately before, rather than a space; otherwise it warns in cases where %<
is preceded by -, ", etc...
When running the script, it warned in 3 more occurrences in gcc/cp/call.c,
which I updated too.
>From gcc-bugs-return-641150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:29:55 2019
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From: "TonyELewis at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/82891] stable_sort() won't compile with function object that takes parameters by non-const reference
Date: Thu, 18 Apr 2019 13:29:00 -0000
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--- Comment #6 from Tony E Lewis <TonyELewis at hotmail dot com> ---
(also posted to the libc++ equiv: https://bugs.llvm.org/show_bug.cgi?id=35235)
Thanks to everyone involved in libc++, libstdc++ and wg21 for all work on this.
This makes sense to me. When the world is awash in good concepts-based compiler
diagnostics, this should be pretty easy for users to deal with.
Do the changes arising from issue 3031 take retrospective effect on previous
standards? If not, is there an issue with libc++ / libstdc++ not adhering to
those previous standards? Or is the point that, even if the change isn't
retrospective, the previous standards were "wrong" enough and/or the violation
is trivial enough that it isn't worth supporting the non-const references when
compiling under previous standards?
Either way, thanks very much everyone.
>From gcc-bugs-return-641151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:34:12 2019
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Subject: [Bug libstdc++/82891] stable_sort() won't compile with function object that takes parameters by non-const reference
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Tony E Lewis from comment #6)
> Do the changes arising from issue 3031 take retrospective effect on previous
> standards?
Yes.
> If not, is there an issue with libc++ / libstdc++ not adhering to
> those previous standards?
No. We do not pedantically adhere to defective specifications. It was a defect
in the old standards, it's been fixed by improving the spec.
Implementing before+after for every standard defect in different dialects would
be totally unmaintainable anyway.
> Or is the point that, even if the change isn't
> retrospective, the previous standards were "wrong" enough and/or the
> violation is trivial enough that it isn't worth supporting the non-const
> references when compiling under previous standards?
That too.
>From gcc-bugs-return-641152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:34:50 2019
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Subject: [Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool
Date: Thu, 18 Apr 2019 13:34:00 -0000
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--- Comment #8 from Tony E Lewis <TonyELewis at hotmail dot com> ---
As far as I can see on Godbolt, this is now fixed in trunk. I'm happy for this
issue to be closed.
>From gcc-bugs-return-641153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:38:06 2019
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Subject: [Bug c++/80485] rejects-valid: constexpr static_cast of pointer-to-member-function to bool
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.2.0
Target Milestone|--- |8.2
Known to fail| |7.4.0, 8.1.0
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Jason, I assume you don't plan to backport this to gcc-7-branch?
>From gcc-bugs-return-641154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:40:48 2019
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Subject: [Bug libstdc++/82891] stable_sort() won't compile with function object that takes parameters by non-const reference
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--- Comment #8 from Tony E Lewis <TonyELewis at hotmail dot com> ---
That makes sense. Thanks for the quick and clear response.
>From gcc-bugs-return-641155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:41:13 2019
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Subject: [Bug c++/81159] New warning idea: -Wself-move
Date: Thu, 18 Apr 2019 13:41:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The warning is taking place in the front end, long before inlining/cprop has
run.
>From gcc-bugs-return-641156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:43:05 2019
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Subject: [Bug middle-end/90139] ICE in emit_block_move_hints, at expr.c:1601
Date: Thu, 18 Apr 2019 13:43:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'd say this is a tree-outof-ssa.c bug, in elim_create it calls get_temp_reg on
a SSA_NAME which has VECTOR_TYPE with one SFmode element, and as SPARC backend
doesn't have V1SFmode, it has BLKmode. Creating a BLKmode pseudo of course
doesn't work too well.
>From gcc-bugs-return-641157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:44:14 2019
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Subject: [Bug middle-end/90139] ICE in emit_block_move_hints, at expr.c:1601
Date: Thu, 18 Apr 2019 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90139
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-18
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46197
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46197&action=edit
gcc9-pr90139.patch
Untested fix.
>From gcc-bugs-return-641158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:46:03 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #39 from Segher Boessenkool <segher at gcc dot gnu.org> ---
On a linux kernel defconfig build it increases code size by 0.567%.
That seems a bit much :-(
The peephole only recognises
mov rA,rB
cmp rB,#0
and not
mov rA,rB
cmp rA,#0
or
cmp rB,#0
mov rA,rB
and we see a lot of the latter, after my patch anyway.
>From gcc-bugs-return-641159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:51:07 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 18 Apr 2019 13:51:00 -0000
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--- Comment #40 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #39)
> On a linux kernel defconfig build it increases code size by 0.567%.
> That seems a bit much :-(
>
> The peephole only recognises
>
> mov rA,rB
> cmp rB,#0
>
> and not
>
> mov rA,rB
> cmp rA,#0
Well, changing the peephole2 so that it handles both of the above at the same
time shall be quite easy.
>
> or
>
> cmp rB,#0
> mov rA,rB
And adding a peephole for this case too.
The question is what the code size differences would be with those changes
(i.e. how often does it help not to have *movsi_compare0 make RA decisions
worse vs. how often we actually have those two instructions separated by other
insns).
>From gcc-bugs-return-641160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:52:10 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
Date: Thu, 18 Apr 2019 13:52:00 -0000
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--- Comment #86 from Zaak <zbeekman at gmail dot com> ---
> (In reply to fink from comment #85)
>
> Zaak,
> I have patches for Fink for gcc5-gcc8 release tarballs. I'm waiting for the
> gcc5 build to finish before I make a public commit, which should be tonight.
Thanks! I'll keep an eye out for those, but please don't hesitate to ping me
when you push them out.
In the meantime, a user has adapted the patch for gcc-8 and can be seen here:
https://github.com/androidports/homebrew-patch/blob/master/Formula/gcc.rb#L153-L255
I'm currently compiling and testing and have opened up a PR on homebrew-core:
https://github.com/Homebrew/homebrew-core/pull/39041
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #41 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Wilco from comment #38)
> Well the question really is what is bad about movsi_compare0 that could be
> easily fixed?
"Easily fixed"... There is no such thing here.
Because it is a parallel everything has to work on the compare and the move
together. Various things do not handle that, things that only handle simple
moves for example. Like prepare_shrink_wrap in this testcase. And for many
other things you have to split the parallel before you can do the transform
you want.
>From gcc-bugs-return-641162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 13:56:29 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #42 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #40)
> The question is what the code size differences would be with those changes
> (i.e. how often does it help not to have *movsi_compare0 make RA decisions
> worse vs. how often we actually have those two instructions separated by
> other insns).
Yeah. If someone writes patches adding the peepholes, I can test it, but I'm
no hero at writing peepholes, esp. for an arch I do not fully understand :-/
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Subject: [Bug middle-end/90139] [9 Regression] ICE in emit_block_move_hints, at expr.c:1601
Date: Thu, 18 Apr 2019 13:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Target Milestone|--- |9.0
Summary|ICE in |[9 Regression] ICE in
|emit_block_move_hints, at |emit_block_move_hints, at
|expr.c:1601 |expr.c:1601
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
At least on x86_64-linux on the testcase in the patch this started to ICE with
r265677, so it is a recent regression.
>From gcc-bugs-return-641164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:06:57 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #43 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #40)
> The question is what the code size differences would be with those changes
> (i.e. how often does it help not to have *movsi_compare0 make RA decisions
> worse vs. how often we actually have those two instructions separated by
> other insns).
How does *movsi_compare0 make RA decisions worse other than the issue of p116
not being assigned r0 above, which my patch attached above fixes?
>From gcc-bugs-return-641165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:10:03 2019
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Subject: [Bug bootstrap/90132] make bootstrap fails with -O3 (gcc9 snapshot 20190414)
Date: Thu, 18 Apr 2019 14:10:00 -0000
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--- Comment #5 from Jason Mancini <jayrusman at hotmail dot com> ---
But bootstrap-O3 is a documented target, which is equivalent to BOOT_CFLAGS='-g
-O3', per https://gcc.gnu.org/install/build.html
>From gcc-bugs-return-641166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:14:17 2019
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Subject: [Bug inline-asm/52813] %rsp in clobber list is silently ignored
Date: Thu, 18 Apr 2019 14:14:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #11)
> (In reply to Eric Gallager from comment #10)
> > So after these 2, has this been fixed now?
> OK for me.
OK.
>From gcc-bugs-return-641167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:16:53 2019
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Thu, 18 Apr 2019 14:16:00 -0000
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--- Comment #12 from Jeffrey A. Law <law at redhat dot com> ---
Nick has indicated this is a gas bug. Tracking via:
https://sourceware.org/bugzilla/show_bug.cgi?id=24464
>From gcc-bugs-return-641168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:25:00 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 18 Apr 2019 14:25:00 -0000
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--- Comment #44 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, it requires that the RA looks specially for this kind of pattern and if
it ends up being a noop move, nothing simplifies the pattern again back to
normal comparison, and as Segher noted, it can negatively affect other
optimization passes.
Completely untested patch peephole2 patch:
--- gcc/config/arm/arm.md.jj 2019-03-19 11:04:49.283170205 +0100
+++ gcc/config/arm/arm.md 2019-04-18 16:21:18.974543408 +0200
@@ -10928,12 +10928,22 @@
[(set (match_operand:SI 0 "arm_general_register_operand" "")
(match_operand:SI 1 "arm_general_register_operand" ""))
(set (reg:CC CC_REGNUM)
- (compare:CC (match_dup 1) (const_int 0)))]
+ (compare:CC (match_operand:SI 2 "arm_general_register_operand" "")
+ (const_int 0)))]
+ "TARGET_ARM
+ && (rtx_equal_p (operands[2], operands[0])
+ || rtx_equal_p (operands[2], operands[1]))"
+ [(parallel [(set (reg:CC CC_REGNUM) (compare:CC (match_dup 1) (const_int
0)))
+ (set (match_dup 0) (match_dup 1))])])
+
+(define_peephole2
+ [(set (reg:CC CC_REGNUM)
+ (compare:CC (match_operand:SI 1 "arm_general_register_operand" "")
+ (const_int 0)))]
+ (set (match_operand:SI 0 "arm_general_register_operand" "") (match_dup 1))]
"TARGET_ARM"
[(parallel [(set (reg:CC CC_REGNUM) (compare:CC (match_dup 1) (const_int
0)))
- (set (match_dup 0) (match_dup 1))])]
- ""
-)
+ (set (match_dup 0) (match_dup 1))])])
(define_split
[(set (match_operand:SI 0 "s_register_operand" "")
>From gcc-bugs-return-641169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:27:44 2019
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Subject: [Bug bootstrap/90132] make bootstrap fails with -O3 (gcc9 snapshot 20190414)
Date: Thu, 18 Apr 2019 14:27:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even in that case, several times in the past we've just decided to recommend
--disable-werror in those cases instead of adding too ugly workarounds for some
warnings (while for the default we always add workarounds or disable warnings
or whatever is needed to make them build cleanly).
The thing is, with too many different optimization options vs. different
targets etc. the support matrix for warning-free builds gets too large.
>From gcc-bugs-return-641171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:31:36 2019
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Subject: [Bug middle-end/85414] [8 Regression] ICE: in ix86_expand_prologue, at config/i386/i386.c:13810 with -Og -fgcse
Date: Thu, 18 Apr 2019 14:31:00 -0000
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Bug 85414 depends on bug 90095, which changed state.
Bug 90095 Summary: [9 Regression] wrong code with -Os -fno-tree-bit-ccp
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90095
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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>From gcc-bugs-return-641170-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:31:36 2019
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Subject: [Bug middle-end/90095] [9 Regression] wrong code with -Os -fno-tree-bit-ccp
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-641172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:40:07 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #87 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Zaak from comment #86)
> > (In reply to fink from comment #85)
> >
> > Zaak,
> > I have patches for Fink for gcc5-gcc8 release tarballs. I'm waiting for the
> > gcc5 build to finish before I make a public commit, which should be tonight.
>
> Thanks! I'll keep an eye out for those, but please don't hesitate to ping me
> when you push them out.
>
> In the meantime, a user has adapted the patch for gcc-8 and can be seen
> here:
> https://github.com/androidports/homebrew-patch/blob/master/Formula/gcc.
> rb#L153-L255
>
> I'm currently compiling and testing and have opened up a PR on
> homebrew-core:
> https://github.com/Homebrew/homebrew-core/pull/39041
I will apply a patch to my combined darwin 8,3 tree
(https://github.com/iains/gcc-8-branch) and push it later - so you can use
that, but I'd like to wait a little while before back-porting to upstream
branches, just in case uf hidden gremlins - these things happen.
>From gcc-bugs-return-641173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 14:51:12 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90118] Missing space between words
Date: Thu, 18 Apr 2019 14:51:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #3)
> Sorry Martin I didn't noticed you were looking at this PR.
It's OK, I haven't started working on that ;)
>
> I've attached a small patch that checks whether %< has a "word" character
> immediately before, rather than a space; otherwise it warns in cases where
> %< is preceded by -, ", etc...
>
> When running the script, it warned in 3 more occurrences in gcc/cp/call.c,
> which I updated too.
Great.
>From gcc-bugs-return-641174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:01:46 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Thu, 18 Apr 2019 15:01:00 -0000
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--- Comment #65 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46198
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46198&action=edit
gcc9-pr89093.patch
So, can we converge to a single patch that does everything? Attached is
completely untested compilation of Ramana's above patch, the above discussions
and some cleanups/fixes, but I don't have cycles to actually verify it and test
it.
>From gcc-bugs-return-641175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:16:25 2019
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From: "matthew.thompson at nasa dot gov" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/90140] New: Compiler incorrectly rejects use of pure functions in DIMENSION attribute of procedure dummy arguments.
Date: Thu, 18 Apr 2019 15:16:00 -0000
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Bug ID: 90140
Summary: Compiler incorrectly rejects use of pure functions in
DIMENSION attribute of procedure dummy arguments.
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Created attachment 46199
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Reproducer of incorrect compilation
In porting a code that works with Intel Fortran, we started getting errors when
compiling with GCC 8.2 (and 8.3). We eventually whipped up a reproducer and
when run:
(340) $ gfortran -v -save-temps -c dimension_with_function.F90
Using built-in specs.
COLLECT_GCC=gfortran
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-8.2.0/configure --prefix=/ford1/local/gcc/gcc-8.2.0
--disable-multilib
Thread model: posix
gcc version 8.2.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-mtune=generic' '-march=x86-64'
/ford1/local/gcc/gcc-8.2.0/libexec/gcc/x86_64-pc-linux-gnu/8.2.0/f951
dimension_with_function.F90 -cpp=dimension_with_function.f90 -quiet -v
dimension_with_function.F90 -quiet -dumpbase dimension_with_function.F90
-mtune=generic -march=x86-64 -auxbase dimension_with_function -version
-fintrinsic-modules-path
/ford1/local/gcc/gcc-8.2.0/lib/gcc/x86_64-pc-linux-gnu/8.2.0/finclude -o
dimension_with_function.s
GNU Fortran (GCC) version 8.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/ford1/local/gcc/gcc-8.2.0/lib/gcc/x86_64-pc-linux-gnu/8.2.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/ford1/local/gcc/gcc-8.2.0/lib/gcc/x86_64-pc-linux-gnu/8.2.0/finclude
/ford1/local/gcc/gcc-8.2.0/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include
/usr/local/include
/ford1/local/gcc/gcc-8.2.0/include
/ford1/local/gcc/gcc-8.2.0/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include-fixed
/usr/include
End of search list.
GNU Fortran2008 (GCC) version 8.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.0, MPFR version 3.1.4,
MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
dimension_with_function.F90:27:30:
character(32), dimension(this%get_ngas()) :: get_gases
1
Error: ‘get_ngas’ at (1) should be a FUNCTION
dimension_with_function.F90:27:30:
character(32), dimension(this%get_ngas()) :: get_gases
1
Error: ‘get_ngas’ at (1) should be a FUNCTION
dimension_with_function.F90:39:37:
real(wp), dimension(ncol,nlay,0:this%get_ngas()) :: col_gas
1
Error: ‘get_ngas’ at (1) should be a FUNCTION
****
We have tested this reproducer with Intel 19.0.1 and NAG Fortran 6.2 and both
pass it. (A colleague notes that "NAG diagnoses that the PURE is required to do
this.")
I've also reproduced it on my macOS laptop with 8.3 but it's having issues at
the moment, so I'm reporting with the output of 8.2 on my Linux box (I've asked
the admins to install 8.3).
At present we have ugly workarounds where we paste "size(this%gas_names)" where
the declarations use "this%get_ngas()", but we'd prefer the function version
being used.
>From gcc-bugs-return-641176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:25:05 2019
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Subject: [Bug target/16798] PowerPC - Opportunity to use recording form instruction.
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
With all three patches together (Peter's, mine, Jakub's), I get a code size
increase of only 0.047%, much more acceptable. Now looking what that diff
really *is* :-)
>From gcc-bugs-return-641177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:26:26 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/90141] New: Missing test case for ambiguous -gdwarf command line options
Date: Thu, 18 Apr 2019 15:26:00 -0000
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Bug ID: 90141
Summary: Missing test case for ambiguous -gdwarf command line
options
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From opts.c:
case OPT_gdwarf:
if (arg && strlen (arg) != 0)
{
error_at (loc, "%<-gdwarf%s%> is ambiguous; "
"use %<-gdwarf-%s%> for DWARF version "
"or %<-gdwarf%> %<-g%s%> for debug level", arg, arg, arg);
break;
}
else
value = opts->x_dwarf_version;
This diagnostic looks wrong. It is probably missing the = between -gdwarf and
%s.
Since there is no test case for this invocation, I can only guess that it is
wrong.
>From gcc-bugs-return-641178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:26:36 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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Peter Bergner <bergner at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2019-04/msg00768.ht
| |ml
--- Comment #45 from Peter Bergner <bergner at gcc dot gnu.org> ---
I submitted a patch to fix the IRA conflict issue.
>From gcc-bugs-return-641179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:29:52 2019
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Subject: [Bug other/90142] New: contrib/download_prerequisites uses test =Date: Thu, 18 Apr 2019 15:29:00 -0000
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Since download_prerequisites is (probably) run via /bin/sh, it should use
portable shell programming constructs:
--- contrib/download_prerequisites.orig 2017-04-11 16:34:07.000000000 +0000
+++ contrib/download_prerequisites
@@ -122,7 +122,7 @@ md5_check() {
md5_checksum_output=$(md5 -r "${file_to_check}")
# Grab the text before the first space
md5_checksum_detected="${md5_checksum_output%% *}"
- [ "${md5_checksum_expected}" == "${md5_checksum_detected}" ] \
+ [ "${md5_checksum_expected}" = "${md5_checksum_detected}" ] \
|| die "Cannot verify integrity of possibly corrupted file
${file_to_check}"
echo "${file_to_check}: OK"
}
>From gcc-bugs-return-641180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:34:01 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #46 from Segher Boessenkool <segher at gcc dot gnu.org> ---
With all three patches together (Peter's, mine, Jakub's), I get a code size
increase of only 0.047%, much more acceptable. Now looking what that diff
really *is* :-)
>From gcc-bugs-return-641181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:38:33 2019
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Subject: [Bug target/90143] New: Add NetBSD in configure.ac
Date: Thu, 18 Apr 2019 15:38:00 -0000
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Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: roland.illig at gmx dot de
Target Milestone: ---
From
https://github.com/NetBSD/pkgsrc/blob/342fd468170/lang/gcc8/patches/patch-gcc_configure:
--- gcc/configure.orig 2015-09-30 23:06:11.000000000 +0000
+++ gcc/configure
@@ -28321,7 +28321,7 @@ case "$target" in
gcc_cv_target_dl_iterate_phdr=no
fi
;;
- *-*-dragonfly* | *-*-freebsd*)
+ *-*-dragonfly* | *-*-freebsd* | *-*-netbsd* )
if grep dl_iterate_phdr $target_header_dir/sys/link_elf.h > /dev/null
2>&1; then
gcc_cv_target_dl_iterate_phdr=yes
else
>From gcc-bugs-return-641182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:40:52 2019
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Subject: [Bug other/90144] New: Use portable test(1) in isl/configure
Date: Thu, 18 Apr 2019 15:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90144
Bug ID: 90144
Summary: Use portable test(1) in isl/configure
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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From
https://github.com/NetBSD/pkgsrc/blob/342fd468170ed3d1902196089f8b920e333b750e/lang/gcc8/patches/patch-isl_configure:
$NetBSD: patch-isl_configure,v 1.1 2018/05/05 04:08:36 maya Exp $
Make test portable
--- isl/configure.orig 2016-01-14 17:26:10.000000000 +0000
+++ isl/configure
@@ -17561,7 +17561,7 @@ else
fi
- if test "x$with_int" == "ximath-32"; then
+ if test "x$with_int" = "ximath-32"; then
SMALL_INT_OPT_TRUE=
SMALL_INT_OPT_FALSE='#'
else
@@ -17569,7 +17569,7 @@ else
SMALL_INT_OPT_FALSE=
fi
-if test "x$with_int" == "ximath-32"; then :
+if test "x$with_int" = "ximath-32"; then :
$as_echo "#define USE_SMALL_INT_OPT /**/" >>confdefs.h
>From gcc-bugs-return-641183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:41:10 2019
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Thu, 18 Apr 2019 15:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89093
--- Comment #66 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Jakub Jelinek from comment #65)
> Created attachment 46198 [details]
> gcc9-pr89093.patch
>
> So, can we converge to a single patch that does everything? Attached is
> completely untested compilation of Ramana's above patch, the above
> discussions and some cleanups/fixes, but I don't have cycles to actually
> verify it and test it.
Thanks, it misses the go and obj-c personality functions.
I can quickly add that (and what I mentioned above regarding
defining TARGET_HARD_FLOAT as TARGET_HARD_FLOAT_SUB &&
!TARGET_GENERAL_REGS_ONLY.
I can do a native armhf boot/reg-test but that will take 4-5 days.
>From gcc-bugs-return-641184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:42:42 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libffi/90145] New: Wrong comment in float2.c
Date: Thu, 18 Apr 2019 15:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90145
Bug ID: 90145
Summary: Wrong comment in float2.c
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libffi
Assignee: unassigned at gcc dot gnu.org
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From float2.c:
#if 1
/* This is ifdef'd out for now. long double support under SunOS/gcc
is pretty much non-existent. You'll get the odd bus error in library
This is an obvious contradition.
>From gcc-bugs-return-641186-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:44:49 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libffi/90146] New: Add support for NetBSD
Date: Thu, 18 Apr 2019 15:44:00 -0000
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Bug ID: 90146
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Product: gcc
Version: 9.0
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https://github.com/NetBSD/pkgsrc/blob/342fd468170ed3d1902196089f8b920e333b750e/lang/gcc8/patches/patch-libffi_configure
$NetBSD: patch-libffi_configure,v 1.1 2018/05/05 04:08:36 maya Exp $
--- libffi/configure.orig 2013-06-01 17:03:49.000000000 +0000
+++ libffi/configure
@@ -12689,7 +12689,7 @@ case "$target" in
$as_echo "#define FFI_EXEC_TRAMPOLINE_TABLE 1" >>confdefs.h
;;
- *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* |
*-pc-solaris*)
+ *-apple-darwin1* | *-*-freebsd* | *-*-kfreebsd* | *-*-netbsd* |
*-*-openbsd* | *-pc-solaris*)
$as_echo "#define FFI_MMAP_EXEC_WRIT 1" >>confdefs.h
https://github.com/NetBSD/pkgsrc/blob/342fd468170ed3d1902196089f8b920e333b750e/lang/gcc8/patches/patch-libffi_testsuite_libffi.call_float2.c
$NetBSD: patch-libffi_testsuite_libffi.call_float2.c,v 1.1 2018/05/05 04:08:36
maya Exp $
--- libffi/testsuite/libffi.call/float2.c.orig 2013-06-01 17:08:18.000000000
+0000
+++ libffi/testsuite/libffi.call/float2.c
@@ -45,7 +45,7 @@ int main (void)
/* This is ifdef'd out for now. long double support under SunOS/gcc
is pretty much non-existent. You'll get the odd bus error in library
routines like printf(). */
- printf ("%Lf, %Lf, %Lf, %Lf\n", ld, ldblit(f), ld - ldblit(f),
LDBL_EPSILON);
+ printf ("%Lf, %Lf, %Lf, %Lf\n", (long double)ld, (long double)ldblit(f),
(long double)(ld - ldblit(f)), (long double)LDBL_EPSILON);
#endif
/* These are not always the same!! Check for a reasonable delta */
>From gcc-bugs-return-641185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:44:01 2019
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Subject: [Bug c++/89923] printf format check and char8_t
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--- Comment #5 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 5 Apr 2019, tom at honermann dot net wrote:
> To be clear, the position I'm suggesting is that we add support for something
> like these:
We (GCC) don't control printf; the format checking should match what the
actual libc supports.
>From gcc-bugs-return-641187-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:47:17 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcc/90147] New: Support OpenBSD
Date: Thu, 18 Apr 2019 15:47:00 -0000
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Bug ID: 90147
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Product: gcc
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From
https://github.com/NetBSD/pkgsrc/blob/342fd468170ed3d1902196089f8b920e333b750e/lang/gcc8/patches/patch-libgcc_crtstuff.c:
$NetBSD: patch-libgcc_crtstuff.c,v 1.1 2018/05/05 04:08:36 maya Exp $
--- libgcc/crtstuff.c.orig 2017-01-01 12:07:43.000000000 +0000
+++ libgcc/crtstuff.c
@@ -81,7 +81,7 @@ call_ ## FUNC (void) \
#endif
#if defined(TARGET_DL_ITERATE_PHDR) && \
- (defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__))
+ (defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) ||
defined(__OpenBSD__))
#define BSD_DL_ITERATE_PHDR_AVAILABLE
#endif
>From gcc-bugs-return-641188-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:53:48 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #47 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #46)
> With all three patches together (Peter's, mine, Jakub's), I get a code size
> increase of only 0.047%, much more acceptable. Now looking what that diff
> really *is* :-)
I think with Jakub's change you don't need to disable the movsi_compare0
pattern in combine. If regalloc works as expected, it will get split into a
compare so shrinkwrap can handle it.
>From gcc-bugs-return-641189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:56:00 2019
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Subject: [Bug c++/87554] [8/9 Regression] internal compiler error: in record_reference, at cgraphbuild.c:64
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
>From gcc-bugs-return-641190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:57:17 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #88 from Iain Sandoe <iains at gcc dot gnu.org> ---
unless some problem shows up, this is what I will commit to 8.3 (limited
checking only).
https://github.com/iains/gcc-8-branch/commit/235ccac0aeb941c860c1e469a645ab9a90c9eca2
>From gcc-bugs-return-641191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:57:39 2019
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Subject: [Bug debug/90141] Missing test case for ambiguous -gdwarf command line options
Date: Thu, 18 Apr 2019 15:57:00 -0000
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
While here, the "%> %<" was probably a mistake by a recent mass update to
surround command line options with quotes. That program didn't take into
account that the two options %<-gdwarf -g%s%> form a group that should be
enclosed as a whole.
The "%> %<" should be replaced with a simple " ".
>From gcc-bugs-return-641192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 15:59:47 2019
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Subject: [Bug other/90142] contrib/download_prerequisites uses test =Date: Thu, 18 Apr 2019 15:59:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please send patches to the mailing list, not to bugzilla:
https://gcc.gnu.org/contribute.html#patches
>From gcc-bugs-return-641193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:01:05 2019
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Subject: [Bug translation/90148] New: Closing quote in wrong position in plugin.c
Date: Thu, 18 Apr 2019 16:00:00 -0000
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Bug ID: 90148
Summary: Closing quote in wrong position in plugin.c
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From plugin.c, at the bottom:
fatal_error (input_location,
"%<-iplugindir%> <dir> option not passed from the gcc
driver");
The %> should be after the <dir>, not before it.
>From gcc-bugs-return-641194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:01:10 2019
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Thu, 18 Apr 2019 16:01:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Resolution|FIXED |---
--- Comment #21 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Sigh, there is yet another problem with this patch. Consider:
#include <variant>
#include <vector>
struct DeletedMoves
{
DeletedMoves() = default;
DeletedMoves(const DeletedMoves&) = default;
DeletedMoves(DeletedMoves&&) = delete;
DeletedMoves& operator=(const DeletedMoves&) = default;
DeletedMoves& operator=(DeletedMoves&&) = delete;
};
struct ThrowingCopy
{
ThrowingCopy() = default;
ThrowingCopy(const ThrowingCopy&) { throw 1; }
ThrowingCopy& operator=(const ThrowingCopy&) { throw 1; }
};
int main()
{
using namespace std;
variant<int, DeletedMoves, vector<ThrowingCopy>> v;
v.emplace<2>(1);
v.emplace<2>(1);
}
_Never_valueless<vector<ThrowingCopy>> is true, so we try to provide the
strong-exception guarantee:
else if constexpr (__detail::__variant::_Never_valueless_alt<type>())
{
// This construction might throw:
variant __tmp(in_place_index<_Np>, __il,
std::forward<_Args>(__args)...);
// But _Never_valueless_alt<type> means this won't:
*this = std::move(__tmp);
}
However because is_move_assignable_v<DeletedMoves> is false the variant has no
move assignment operator, only a copy assignment operator. That means the
"move" assignment actually uses the variant's copy assignment operator, which
performs a copy of the vector, and that can throw. If the variant's current
contained value is not the same type as the one being emplaced, the copy
assignment will destroy the previous value, and then if copying the vector
throws we become valueless. But the variant thinks it can never become
valueless, so we have undefined behaviour.
We can restrict the strong exception safety guarantee to only happen when the
variant has a move assignment operator:
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -1428,7 +1428,8 @@ namespace __variant
this->_M_reset();
__variant_construct_by_index<_Np>(*this, __tmp);
}
- else if constexpr (__detail::__variant::_Never_valueless_alt<type>())
+ else if constexpr (__detail::__variant::_Never_valueless_alt<type>()
+ && _Traits::_S_move_assign)
{
// This construction might throw:
variant __tmp(in_place_index<_Np>,
@@ -1474,7 +1475,8 @@ namespace __variant
__variant_construct_by_index<_Np>(*this, __il,
std::forward<_Args>(__args)...);
}
- else if constexpr (__detail::__variant::_Never_valueless_alt<type>())
+ else if constexpr (__detail::__variant::_Never_valueless_alt<type>()
+ && _Traits::_S_move_assign)
{
// This construction might throw:
variant __tmp(in_place_index<_Np>, __il,
But this means that branch won't be taken for the variant type in the example
above, and so we don't offer the strong exception safety guarantee for that
type, so we also need to consider the extra condition in the
__never_valueless() function:
@@ -352,7 +352,8 @@ namespace __variant
template <typename... _Types>
constexpr bool __never_valueless()
{
- return (_Never_valueless_alt<_Types>::value && ...);
+ return _Traits<_Types...>::_S_move_assign
+ && (_Never_valueless_alt<_Types>::value && ...);
}
// Defines index and the dtor, possibly trivial.
>From gcc-bugs-return-641195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:07:15 2019
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
Date: Thu, 18 Apr 2019 16:07:00 -0000
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--- Comment #22 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm tempted to just rip out this stuff entirely, and go back to only offering
the strong exception safety guarantee for trivially copyable types, and so
variants would only be never-valueless if all alternatives are trivially
copyable.
>From gcc-bugs-return-641196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:09:37 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #48 from Segher Boessenkool <segher at gcc dot gnu.org> ---
With just Peter's and Jakub's patch, it *improves* code size by 0.090%.
That does not fix this PR though :-/
>From gcc-bugs-return-641197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:10:59 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #49 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Wilco from comment #47)
> (In reply to Segher Boessenkool from comment #46)
> > With all three patches together (Peter's, mine, Jakub's), I get a code size
> > increase of only 0.047%, much more acceptable. Now looking what that diff
> > really *is* :-)
>
> I think with Jakub's change you don't need to disable the movsi_compare0
> pattern in combine. If regalloc works as expected, it will get split into a
> compare so shrinkwrap can handle it.
prepare_shrink_wrap can not handle that. prepare_shrink_wrap needs to be
improved for other reasons, of course.
>From gcc-bugs-return-641198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:15:40 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 18 Apr 2019 16:15:00 -0000
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--- Comment #50 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The insn is
(insn 7 3 8 2 (parallel [
(set (reg:CC 100 cc)
(compare:CC (reg:SI 0 r0 [116])
(const_int 0 [0])))
(set (reg/v:SI 4 r4 [orig:112 a ] [112])
(reg:SI 0 r0 [116]))
]) "ira-shrinkwrap-prep-1.c":17:6 188 {*movsi_compare0}
(nil))
and that isn't split, and then prepare_shrink_wrap gives up on it.
>From gcc-bugs-return-641199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:20:03 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 18 Apr 2019 16:20:00 -0000
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--- Comment #51 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #50)
> The insn is
>
> (insn 7 3 8 2 (parallel [
> (set (reg:CC 100 cc)
> (compare:CC (reg:SI 0 r0 [116])
> (const_int 0 [0])))
> (set (reg/v:SI 4 r4 [orig:112 a ] [112])
> (reg:SI 0 r0 [116]))
> ]) "ira-shrinkwrap-prep-1.c":17:6 188 {*movsi_compare0}
> (nil))
>
> and that isn't split, and then prepare_shrink_wrap gives up on it.
In the more general case splitting this would produce worse code, not better,
since then we'd end up with two instructions rather than one.
>From gcc-bugs-return-641200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:30:04 2019
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Subject: [Bug tree-optimization/90149] New: diagnostics containing BIT_FIELD_REF don't conform to diagnostics guideline
Date: Thu, 18 Apr 2019 16:30:00 -0000
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Bug ID: 90149
Summary: diagnostics containing BIT_FIELD_REF don't conform to
diagnostics guideline
Product: gcc
Version: 9.0
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The guideline for diagnostics
(https://gcc.gnu.org/onlinedocs/gccint/Guidelines-for-Diagnostics.html) says:
> 27.1.1 Talk in terms of the user’s code
From tree-cfg.c:
error ("BIT_FIELD_REF of non-mode-precision operand");
The word BIT_FIELD_REF (in uppercase) appears neither in the C nor in the C++
standard. Therefore it is probably not "in terms of the user's code".
This error message should probably be an internal error instead. This also
applies to many other diagnostics, especially those in tree-cfg.c.
>From gcc-bugs-return-641201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:32:50 2019
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Subject: [Bug tree-optimization/90149] diagnostics containing BIT_FIELD_REF don't conform to diagnostics guideline
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
Just another remark:
The words "BIT_FIELD_REF of non-mode-precision operand" do not occur anywhere
in the test suite. They should. Or did I miss something?
If this is meant to be unreachable code, it should rather be an "assert"
instead of an "error".
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Subject: [Bug c++/87554] [8/9 Regression] internal compiler error: in record_reference, at cgraphbuild.c:64
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--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 18 16:50:10 2019
New Revision: 270445
URL: https://gcc.gnu.org/viewcvs?rev=270445&root=gcc&view=rev
Log:
PR c++/87554 - ICE with extern template and reference member.
The removed code ended up setting DECL_INITIAL to the INIT_EXPR returned by
split_nonconstant_init, which makes no sense. This code was added back in
1996, so any rationale is long lost.
* decl.c (cp_finish_decl): Don't set DECL_INITIAL of external vars.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/extern_template-5.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #67 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 46200
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46200&action=edit
updated patch
So, that is what I am going to bootstrap now.
Adds a libgo patch and some minor changes, mostly where to
put the target-attribute (immediately before the function name).
I assume we can apply that to libgo when its ready.
(I wrote a change log entry but actually there is no libgo/ChangeLog)
>From gcc-bugs-return-641204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 16:59:34 2019
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Subject: [Bug tree-optimization/90149] diagnostics containing BIT_FIELD_REF don't conform to diagnostics guideline
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is recorded as a different bug report. I think that one was reported by
me. I will find it latertoday.
>From gcc-bugs-return-641206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 17:03:34 2019
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Subject: [Bug ipa/85051] [7/8/9 Regression] ICE: in edge_badness, at ipa-inline.c:1035 with flattening recursive calls
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--- Comment #7 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Thu Apr 18 17:03:00 2019
New Revision: 270446
URL: https://gcc.gnu.org/viewcvs?rev=270446&root=gcc&view=rev
Log:
PR ipa/85051
* ipa-inline.c (flatten_function): New parameter UPDATE.
(ipa_inline, early_inliner): Use it.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-inline.c
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Subject: [Bug tree-optimization/90037] [9 Regression] -Wnull-dereference false positive after r269302
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--- Comment #12 from Jeffrey A. Law <law at redhat dot com> ---
So another update and a rather surprising one at that.
One of the things that is clear is that we need to do some kind of cleanup
between DOM and erroneous path isolation. Furthermore, the existing cleanup
done by phi-only-cprop is insufficient.
So I finished cobbling together the necessary extensions to phi-only cprop.
Essentially if we have one or more degenerate PHIs in a block, we also scan the
block for const/copy propagation opportunities.
I then compared that to just using the lattice cprop.
It turns out that the lattice based cprop is consistently better. Using
valgrind/cachegrind across a collection of .i files the lattice cprop version
executes about .5% fewer instructions. It was better on each and every input
source file.
Of course to fix the BZ we're going to have to add an instance of the pass. So
I compared a pristine compiler to one with an extra pass of the lattice copy
propagator inserted between DOM and erroneous path isolation. The total
slowdown is in the .4% range.
>From a codegen standpoint, it looks like a wash, which was largely expected.
We tend to clean things up earlier in the pipeline, but the net result is
almost always the same.
I still need to look at the VN on the SEME approach. That's today's task.
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #52 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #48)
> With just Peter's and Jakub's patch, it *improves* code size by 0.090%.
> That does not fix this PR though :-/
But it does fix most of the codesize regression. The shrinkwrapping testcase
seems a preexisting problem that was exposed by the combine changes, so it
doesn't need to hold up the release. The regalloc change might fix
addr-modes-float.c too.
>From gcc-bugs-return-641208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 17:09:12 2019
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Subject: [Bug fortran/90150] New: wrong output produced by float format fX.Y descriptor following translated scientific format XpeY.Z
Date: Thu, 18 Apr 2019 17:09:00 -0000
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Bug ID: 90150
Summary: wrong output produced by float format fX.Y descriptor
following translated scientific format XpeY.Z
Product: gcc
Version: 6.2.0
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Created attachment 46201
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46201&action=edit
Simple test program that reproduces the error
Hi,
just found this error in floating point string format in gfortran 7.4.0.
The error affects floating point output (fX.Y), ONLY when this follows a
scientific output with heading non-zeros (ZpeX.Y).
The fX.Y output number is multiplied i.e. translated by as many digits as in
the previous scientific specifier. The issue seems to happen only when both are
part of a same string format.
The attached program prints the same two numbers (1000.0, 10.0) three times
with the following formats:
A = 1000.0
b = 10.0
$ a.exe
0.100E+04 10.000 ! "(1e10.3,1x,f8.3)"
1.000E+03 100.000 ! "(1pe10.3,1x,f8.3)"
10.00E+02 1000.000 ! "(2pe10.3,1x,f8.3)"
Thanks and keep up the good work!
Federico
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Subject: [Bug c++/87554] [8 Regression] internal compiler error: in record_reference, at cgraphbuild.c:64
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] internal |[8 Regression] internal
|compiler error: in |compiler error: in
|record_reference, at |record_reference, at
|cgraphbuild.c:64 |cgraphbuild.c:64
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #8)
> The constructor indeed looks broken to me: it should not have naked
> var_decl. So I am changing component to C++
I agree that the C++ front end is wrong here, but I also wonder why cgraph is
looking at the DECL_INITIAL of a DECL_EXTERNAL variable.
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Subject: [Bug tree-optimization/90149] diagnostics containing BIT_FIELD_REF don't conform to diagnostics guideline
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually it was reported by you :)
PR 79878
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Subject: [Bug c++/87554] [8 Regression] internal compiler error: in record_reference, at cgraphbuild.c:64
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--- Comment #11 from Jan Hubicka <hubicka at ucw dot cz> ---
> > The constructor indeed looks broken to me: it should not have naked
> > var_decl. So I am changing component to C++
>
> I agree that the C++ front end is wrong here, but I also wonder why cgraph is
> looking at the DECL_INITIAL of a DECL_EXTERNAL variable.
Well, at least for constant variables those are useful for contant
folding. But I suppose we may take care to get rid of decl initials
of non-readonly externals somewhere soon (we do it eventually as part
of unreachable code removal)
Honza
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/90151] New: 554.roms_r regression on x86_64 at -O2 and generic march/mtune
Date: Thu, 18 Apr 2019 17:16:00 -0000
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Bug ID: 90151
Summary: 554.roms_r regression on x86_64 at -O2 and generic
march/mtune
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Blocks: 26163
Target Milestone: ---
Host: x86_64-linux
Target: x86_64-linux
My apologies for discovering and reporting this so late, but my
measurements show that 554.roms_r at -O2 and with generic x86_64
march/mtune regressed in performance when compiled with GCC 8 or GCC 9
compared to GCC 7. On an Intel Sandy Bridge I see 4% slowdown, on an
AMD Zen CPU I see 6.8%, LNT reports almost 4% on Kaby Lake and 5.5% on
Zen: https://lnt.opensuse.org/db_default/v4/SPEC/spec_report/branch
I have bisected this down to r254885 which is Honza's update of
profile info in IPA-CP:
Author: hubicka
Date: Fri Nov 17 17:41:10 2017
New Revision: 254885
URL: https://gcc.gnu.org/viewcvs?rev=254885&root=gcc&view=rev
Log:
* ipa-cp.c (update_profiling_info): Handle conversion to local
profile.
* tree-cfg.c (execute_fixup_cfg): Do fixup same way as inliner does.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-cp.c
trunk/gcc/tree-cfg.c
I compared the number of samples in the hottest functions and arrived
at the following table:
| Object | Function | r254884 | r254885 | diff
| % |
|--------------+------------------------------------+---------+---------+-------+--------|
| roms_r_base | __step2d_mod_MOD_step2d_tile | 407180 | 409257 | 2077
| +0.51 |
| roms_r_base | __pre_step3d_mod_MOD_pre_step3d | 118119 | 134705 | 16586
| +14.04 |
| roms_r_base | __t3dmix_mod_MOD_t3dmix2 | 85499 | 101650 | 16151
| +18.89 |
| roms_r_base | __step3d_t_mod_MOD_step3d_t | 85003 | 104599 | 19596
| +23.05 |
| roms_r_base | __rho_eos_mod_MOD_rho_eos_tile | 74216 | 74746 | 530
| +0.71 |
| roms_r_base | __step3d_uv_mod_MOD_step3d_uv_tile | 66393 | 67117 | 724
| +1.09 |
| roms_r_base | __rhs3d_mod_MOD_rhs3d | 62354 | 73321 | 10967
| +17.59 |
| roms_r_base | __lmd_skpp_mod_MOD_lmd_skpp | 59767 | 70798 | 11031
| +18.46 |
| libm-2.29.so | __ieee754_exp_fma | 54324 | 56546 | 2222
| +4.09 |
| roms_r_base | __prsgrd_mod_MOD_prsgrd | 48439 | 56413 | 7974
| +16.46 |
| roms_r_base | __uv3dmix_mod_MOD_uv3dmix2 | 45255 | 52950 | 7695
| +17.00 |
| roms_r_base | __lmd_vmix_mod_MOD_lmd_vmix | 45069 | 46098 | 1029
| +2.28 |
| libm-2.29.so | __ieee754_pow_fma | 39869 | 40731 | 862
| +2.16 |
When I looked at what happens to the compilation unit with
__step3d_t_mod_MOD_step3d_t, I discovered that no IPA-CP is taking
place. In fact all IPA dumps from both revisions are exactly the
same, but profile counts of BB in tree dumps that immediately follow
are vastly different:
$ diff -u0 1/step3d_t.fppized.f90.092t.ccp2 2/step3d_t.fppized.f90.092t.ccp2 |
head -38
--- 1/step3d_t.fppized.f90.092t.ccp2 2019-04-18 18:34:39.725703893 +0200
+++ 2/step3d_t.fppized.f90.092t.ccp2 2019-04-18 18:53:23.999336873 +0200
@@ -1064 +1064 @@
- <bb 2> [local count: 8]:
+ <bb 2> [local count: 10000]:
@@ -1227 +1227 @@
- <bb 3> [local count: 4]:
+ <bb 3> [local count: 5000]:
@@ -1229 +1229 @@
- <bb 4> [local count: 8]:
+ <bb 4> [local count: 10000]:
@@ -1264 +1264 @@
- <bb 5> [local count: 4]:
+ <bb 5> [local count: 5000]:
@@ -1266 +1266 @@
- <bb 6> [local count: 8]:
+ <bb 6> [local count: 10000]:
@@ -1314 +1314 @@
- <bb 7> [local count: 4]:
+ <bb 7> [local count: 5000]:
@@ -1316 +1316 @@
- <bb 8> [local count: 8]:
+ <bb 8> [local count: 10000]:
@@ -1347 +1347 @@
- <bb 9> [local count: 4]:
+ <bb 9> [local count: 5000]:
@@ -1349 +1349 @@
- <bb 10> [local count: 8]:
+ <bb 10> [local count: 10000]:
@@ -1380 +1380 @@
- <bb 11> [local count: 4]:
+ <bb 11> [local count: 5000]:
@@ -1382 +1382 @@
- <bb 12> [local count: 8]:
+ <bb 12> [local count: 10000]:
@@ -1407 +1407 @@
- <bb 13> [local count: 4]:
+ <bb 13> [local count: 5000]:
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
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From: "jayrusman at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/90132] make bootstrap fails with -O3 (gcc9 snapshot 20190414)
Date: Thu, 18 Apr 2019 17:20:00 -0000
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--- Comment #7 from Jason Mancini <jayrusman at hotmail dot com> ---
Okay! The patch in Comment #1 worked for me. Someone else can fix or reject as
it's not an important bug then.
>From gcc-bugs-return-641214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:05:52 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90152] New: untranslated strings in print_z_candidate
Date: Thu, 18 Apr 2019 18:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90152
Bug ID: 90152
Summary: untranslated strings in print_z_candidate
Product: gcc
Version: 9.0
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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From call.c:
const char *msg = (msgstr == NULL
? ""
: ACONCAT ((msgstr, " ", NULL)));
inform (cloc, "%s%<%D(%T, %T, %T)%> <built-in>", msg, fn,
candidate->convs[0]->type,
candidate->convs[1]->type,
candidate->convs[2]->type);
As a translator I have no idea what this first %s might be. It turns out that
by inspecting the call hierarchy, it can be, among others:
print_z_candidate (0, " after user-defined conversion:",
t->cand);
That's a string literal starting with two spaces (rather uncommon I think), and
in addition, this string is never translated, as it does not appear in gcc.pot.
If the msgstr can be translated as a self-contained unit of text in all the
languages into which GCC is translated (which as of 2019 are mainly French and
German), the proper fix is to surround these strings with _(...). If not, each
of these messages needs its own call to inform().
There's even a comment above print_z_candidate:
NOTE: Unlike most diagnostic functions in GCC, MSGSTR is expected
to have been run through gettext by the caller. This wart makes
life simpler in print_z_candidates and for the translators. */
Instead of this comment, it would be better to pass the untranslated msgstr to
print_z_candidate by enclosing the actual string literals with _(...). Then,
print_z_candidates could be run in a special test build in which there is an
arbitrary translation for each msgid. Then, gettext(msgstr) must be different
from msgstr itself.
>From gcc-bugs-return-641215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:09:17 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90118] Missing space between words
Date: Thu, 18 Apr 2019 18:09:00 -0000
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--- Comment #5 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Christophe Lyon from comment #3)
> When running the script, it warned in 3 more occurrences in gcc/cp/call.c,
> which I updated too.
By reading the code, I think these instances are correct since the trailing
space is added by this code:
const char *msg = (msgstr == NULL
? ""
: ACONCAT ((msgstr, " ", NULL)));
There's a much worse problem regarding the first %s though, which I have just
reported in bug 90152.
It would be good if the check-internal-format-escaping.py linter would actually
output what is wrong in the msgid. The number of checks will increase as I'm
trying to translate the rest of GCC 9, therefore it will become more difficult
to guess what is wrong with a translation. Ideally this linter should follow
the GCC guidelines for diagnostics, which are described in
https://gcc.gnu.org/onlinedocs/gccint/Guidelines-for-Diagnostics.html.
>From gcc-bugs-return-641216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:12:04 2019
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Subject: [Bug translation/90152] untranslated strings in print_z_candidate
Date: Thu, 18 Apr 2019 18:12:00 -0000
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Roland Illig from comment #0)
> Instead of this comment, it would be better to pass the untranslated msgstr
> to print_z_candidate by enclosing the actual string literals with _(...).
Oops, I meant N_(...) of course.
The _(...) would then be inside print_z_candidates.
>From gcc-bugs-return-641217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:24:36 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90153] New: aarch64: unclear diagnostic for stack-protector options
Date: Thu, 18 Apr 2019 18:24:00 -0000
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Bug ID: 90153
Summary: aarch64: unclear diagnostic for stack-protector
options
Product: gcc
Version: 9.0
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From aarch64.c:
if (aarch64_stack_protector_guard == SSP_SYSREG
&& !(opts->x_aarch64_stack_protector_guard_offset_str
&& opts->x_aarch64_stack_protector_guard_reg_str))
{
error ("both %<-mstack-protector-guard-offset%> and "
"%<-mstack-protector-guard-reg%> must be used "
"with %<-mstack-protector-guard=sysreg%>");
}
From reading the diagnostic alone, it could also mean:
-mstack-protector-guard-offset requires -mstack-protector-guard=sysreg
and
-mstack-protector-guard-reg requires -mstack-protector-guard=sysreg
actually it's the other way round:
mstack-protector-guard=sysreg requires both mstack-protector-guard-offset and
mstack-protector-guard-reg to be set.
The term "must be used with" is ambiguous regarding the direction of the "must
be used" here. It could mean "from right to left", or alternatively, "from left
to right".
>From gcc-bugs-return-641218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:37:38 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90154] New: aarch64: insufficient check for aarch64_stack_protector_guard_reg_str
Date: Thu, 18 Apr 2019 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90154
Bug ID: 90154
Summary: aarch64: insufficient check for
aarch64_stack_protector_guard_reg_str
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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From aarch64.c:
if (opts->x_aarch64_stack_protector_guard_reg_str)
{
if (strlen (opts->x_aarch64_stack_protector_guard_reg_str) > 100)
error ("specify a system register with a small string length.");
}
As the German translator I stumbled upon this error message and I had to dig
into the code to find a proper translation for it. Now I have the following
questions:
What are the valid register names?
Is any of these possible names longer than 5 characters?
Why the arbitrary limit on 100 characters?
Where can I find the list of sensible register names to use?
The term "with a small string length" is really confusing. Granted, no one will
ever see this message. Nevertheless, even if I specify "abcde" as the register
name, it will probably be incorrect, and the generated code will be wrong.
I could also launch an Assembly Injection attack on this piece of code by
specifying "0" or "0; halt" or something similar as the register name. I don't
know anything about AArch64 assembly, therefore I'm not the ideal person to
launch this attack. But someone else could.
Having this diagnostic just because of the following code is a lame excuse:
char buf[150];
snprintf (buf, 150, "mrs\\t%%<w>0, %s",
aarch64_stack_protector_guard_reg_str);
Why not use a dynamically allocated string? Since this is the GCC code, it
should be even simpler than allocating a local buffer. There's probably an
asprintf lying around.
>From gcc-bugs-return-641219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:42:56 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90155] New: aarch64: too much quoting in diagnostic for %d
Date: Thu, 18 Apr 2019 18:42:00 -0000
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Bug ID: 90155
Summary: aarch64: too much quoting in diagnostic for %d
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From aarch64.c:
if (guard_size != probe_interval)
error ("stack clash guard size %<%d%> must be equal to probing interval "
"%<%d%>", guard_size, probe_interval);
https://gcc.gnu.org/onlinedocs/gccint/Guidelines-for-Diagnostics.html#Quoting
says:
> Other elements such as numbers that do not refer to numeric constants that appear in the source code should not be quoted.
Therefore the %<quotes%> around the %d should be removed.
>From gcc-bugs-return-641220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:46:24 2019
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Subject: [Bug fortran/90150] wrong output produced by float format fX.Y descriptor following translated scientific format XpeY.Z
Date: Thu, 18 Apr 2019 18:46:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #1 from kargl at gcc dot gnu.org ---
(In reply to federico from comment #0)
> Created attachment 46201 [details]
> Simple test program that reproduces the error
>
> Hi,
>
> just found this error in floating point string format in gfortran 7.4.0.
>
> The error affects floating point output (fX.Y), ONLY when this follows a
> scientific output with heading non-zeros (ZpeX.Y).
>
> The fX.Y output number is multiplied i.e. translated by as many digits as in
> the previous scientific specifier. The issue seems to happen only when both
> are part of a same string format.
>
> The attached program prints the same two numbers (1000.0, 10.0) three times
> with the following formats:
> A = 1000.0
> b = 10.0
>
> $ a.exe
> 0.100E+04 10.000 ! "(1e10.3,1x,f8.3)"
> 1.000E+03 100.000 ! "(1pe10.3,1x,f8.3)"
> 10.00E+02 1000.000 ! "(2pe10.3,1x,f8.3)"
>
>
Can you explain what you think the compiler should output?
The P edit descriptor affects the entire string not just
the immediately following edit descriptor.
>From gcc-bugs-return-641221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:48:43 2019
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Subject: [Bug translation/90156] New: add linter check suggesting to replace %<%s%> with %qs
Date: Thu, 18 Apr 2019 18:48:00 -0000
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Bug ID: 90156
Summary: add linter check suggesting to replace %<%s%> with %qs
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For GCC 9, all occurrences of %<%s%> had been replaced with %qs.
That must have been before 2019-01-08 since on that day the following code
appeared in aarch64.c:
error ("invalid arg %<%s%> for %<-mbranch-protection=%>", str);
To prevent this unnecessarily verbose %<%s%> in the future,
check-internal-format-escaping.py should check for this as well and suggest to
replace it with the simpler %qs.
>From gcc-bugs-return-641222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:50:27 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #68 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Comment on attachment 46200
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46200
updated patch
I believe the second hunk in libgo/runtime/go-unwind.c is incorrect, that is on
code not guarded with #ifdef __ARM_EABI_UNWINDER__, so that will break all
other targets.
I can do a distro build which includes --enable-checking=release
bootstrap/regtest within ~ 24 hours or so, but all that is done without me
having easy access to it, so if it works, fine, if it doesn't, I'll just know
it does not.
>From gcc-bugs-return-641223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:51:58 2019
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Subject: [Bug translation/90157] New: aarch64: unnecessary abbreviation in diagnostic
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Bug ID: 90157
Summary: aarch64: unnecessary abbreviation in diagnostic
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From aarch64.c:
error ("missing arg for %<-mbranch-protection=%>");
The word "arg" is only allowed in code, not in diagnostics. For example,
https://gcc.gnu.org/codingconventions.html#Diagnostics always talks about
"arguments" never about "args".
>From gcc-bugs-return-641224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:56:20 2019
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Subject: [Bug translation/90158] New: aarch64: wrong quotation in diagnostics
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Bug ID: 90158
Summary: aarch64: wrong quotation in diagnostics
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From aarch64.c:
error ("invalid name (\"%s\") in %<target(\"arch=\")%> pragma or attribute",
str);
Here, the "%s" should be replaced with %qs, to conform to the GCC guidelines
for diagnostics, see
https://gcc.gnu.org/onlinedocs/gccint/Guidelines-for-Diagnostics.html#Quoting.
error ("invalid feature modifier %s of value (\"%s\") in "
"%<target()%> pragma or attribute", invalid_extension.c_str (), str);
The %s must be %qs here.
>From gcc-bugs-return-641225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 18:58:07 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46198|0 |1
is obsolete| |
--- Comment #69 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46202
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46202&action=edit
gcc9-pr89093.patch
So, here is the above patch updated in the one libgo hunk.
>From gcc-bugs-return-641226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:01:39 2019
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Subject: [Bug translation/90158] aarch64: wrong quotation in diagnostics
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
The above are not the only occurrences in aarch64.c, there is at least one
more. It's easy to find: \"%s\" or a simple %s surrounded by spaces on both
ends.
See also bug 90156.
>From gcc-bugs-return-641227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:02:23 2019
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Subject: [Bug translation/90156] add linter check suggesting to replace %<%s%> with %qs
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
To fix bug 90158 thoroughly, please also add \"%s\" to the forbidden string
literals.
>From gcc-bugs-return-641228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:10:43 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #70 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Yes, thanks, now switching to your latest patch.
>From gcc-bugs-return-641229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:13:59 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #53 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Richard Earnshaw from comment #51)
> In the more general case splitting this would produce worse code, not
> better, since then we'd end up with two instructions rather than one.
Sure, it _often_ is good to have it merged. Quite clearly more often than
not it's good, so if you have to pick only one way, this is the way to go.
Hopefully we can do better though. But not for stage 4, sure.
>From gcc-bugs-return-641230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:16:34 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
Date: Thu, 18 Apr 2019 19:16:00 -0000
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--- Comment #54 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Wilco from comment #52)
> (In reply to Segher Boessenkool from comment #48)
> > With just Peter's and Jakub's patch, it *improves* code size by 0.090%.
> > That does not fix this PR though :-/
>
> But it does fix most of the codesize regression.
Yes, and it often creates *better* code, as far as I can see.
> The shrinkwrapping testcase
> seems a preexisting problem that was exposed by the combine changes,
It is.
> so it
> doesn't need to hold up the release. The regalloc change might fix
> addr-modes-float.c too.
I'd like to see the RA fix in GCC 9.
>From gcc-bugs-return-641231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:20:01 2019
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From: "david.bolvansky at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90159] New: Poor warning for an ambiguous reference
Date: Thu, 18 Apr 2019 19:20:00 -0000
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Bug ID: 90159
Summary: Poor warning for an ambiguous reference
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Test case:
#include <queue>
#include <algorithm>
using namespace std;
struct sort_heap
{
bool operator()(const int* lhs, const int* rhs) const
{
return *lhs < *rhs;
}
};
void foo()
{
std::priority_queue<int*, std::vector<int*>, sort_heap> tmp;
}
<source>: In function 'void foo()':
<source>:16:59: error: template argument 3 is invalid
16 | std::priority_queue<int*, std::vector<int*>, sort_heap> tmp;
| ^
<source>:16:61: warning: unused variable 'tmp' [-Wunused-variable]
16 | std::priority_queue<int*, std::vector<int*>, sort_heap> tmp;
| ^~~
GCC does not provide enough info why argument is really invalid. Clang produces
more info, which explain the root problem:
Clang
<source>:16:50: error: reference to 'sort_heap' is ambiguous
std::priority_queue<int*, std::vector<int*>, sort_heap> tmp;
^
<source>:6:8: note: candidate found by name lookup is 'sort_heap'
struct sort_heap
^
/opt/compiler-explorer/gcc-8.3.0/lib/gcc/x86_64-linux-gnu/8.3.0/../../../../include/c++/8.3.0/bits/algorithmfwd.h:576:5:
note: candidate found by name lookup is 'std::sort_heap'
sort_heap(_RAIter, _RAIter, _Compare);
^
>From gcc-bugs-return-641232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:21:14 2019
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Subject: [Bug translation/90149] diagnostics containing BIT_FIELD_REF don't conform to diagnostics guideline
Date: Thu, 18 Apr 2019 19:21:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-18
CC| |msebor at gcc dot gnu.org
Component|tree-optimization |translation
Ever confirmed|0 |1
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
FWIW, I'm working on a -Wformat enhancement to detect this and some of the
other translation problems you have pointed out. I'm also going through
gcc.pot and looking for patterns like this to detect myself but having them
pointed out by someone actually doing the translation is very helpful. Thank
you!
As for this specific error (and others like it) in tree-cfg.c and a few other
files, they are issued for failures detected by internal consistency checks
that ultimately do trigger an internal compiler error. In my patch I disable
the detection of these problems via #pragma GCC diagnostic ignored
"-Wformat-diag" but another option is to simply fix them:
error ("%qs of non-mode-precision operand", "BIT_FIELD_REF");
The challenge with doing it that it would changing a fair number of messages
and in some cases, make the format strings look pretty cryptic (by replacing
multiple strings with %s directives).
>From gcc-bugs-return-641233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:23:33 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90148] Closing quote in wrong position in plugin.c
Date: Thu, 18 Apr 2019 19:23:00 -0000
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
From arm-builtins.c:
fatal_error (input_location,
"You must enable NEON instructions"
" (e.g. %<-mfloat-abi=softfp%> %<-mfpu=neon%>)"
" to use these intrinsics.");
>From gcc-bugs-return-641234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:27:36 2019
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From: "perini at wisc dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90150] wrong output produced by float format fX.Y descriptor following translated scientific format XpeY.Z
Date: Thu, 18 Apr 2019 19:27:00 -0000
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--- Comment #2 from federico <perini at wisc dot edu> ---
Number b=10.0, so in format f8.3 it should always be output as “ 10.000†?
Federico Perini
________________________________
From: kargl at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>
Sent: Thursday, April 18, 2019 8:46:19 PM
To: Federico Perini
Subject: [Bug fortran/90150] wrong output produced by float format fX.Y
descriptor following translated scientific format XpeY.Z
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90150
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #1 from kargl at gcc dot gnu.org ---
(In reply to federico from comment #0)
> Created attachment 46201 [details]
> Simple test program that reproduces the error
>
> Hi,
>
> just found this error in floating point string format in gfortran 7.4.0.
>
> The error affects floating point output (fX.Y), ONLY when this follows a
> scientific output with heading non-zeros (ZpeX.Y).
>
> The fX.Y output number is multiplied i.e. translated by as many digits as in
> the previous scientific specifier. The issue seems to happen only when both
> are part of a same string format.
>
> The attached program prints the same two numbers (1000.0, 10.0) three times
> with the following formats:
> A = 1000.0
> b = 10.0
>
> $ a.exe
> 0.100E+04 10.000 ! "(1e10.3,1x,f8.3)"
> 1.000E+03 100.000 ! "(1pe10.3,1x,f8.3)"
> 10.00E+02 1000.000 ! "(2pe10.3,1x,f8.3)"
>
>
Can you explain what you think the compiler should output?
The P edit descriptor affects the entire string not just
the immediately following edit descriptor.
--
You are receiving this mail because:
You reported the bug.
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Subject: [Bug translation/90160] New: missing quote in diagnostic
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Bug ID: 90160
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From arm.c:
error ("%s incompatible with %<-mword-relocations%>", flag);
The first %s is also a command line option and thus should be %qs.
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Subject: [Bug translation/90160] missing quote in diagnostic
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
From csky.c:
warning (0, "cpu %s is not based on arch %s, ignoring the arch",
csky_selected_cpu->name, csky_selected_arch->name);
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--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Thu, Apr 18, 2019 at 07:27:31PM +0000, perini at wisc dot edu wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90150
>
> --- Comment #2 from federico <perini at wisc dot edu> ---
> Number b=10.0, so in format f8.3 it should always be output as “ 10.000†?
Ahem, no. 1p changes the scale factor by 10. 2p changes
scale factor to 100. The scale factor is a property of
the output connection. So, 1p and 2p apply to both e10.3
and f8.3 in your format strings.
>> $ a.exe
>> 0.100E+04 10.000 ! "(1e10.3,1x,f8.3)"
>> 1.000E+03 100.000 ! "(1pe10.3,1x,f8.3)"
Perhaps, you want '(1pe10.3,1x,0pf8.3)'
>> 10.00E+02 1000.000 ! "(2pe10.3,1x,f8.3)"
Perhaps, you want '(2pe10.3,1x,0pf8.3)'
> Can you explain what you think the compiler should output?
>
> The P edit descriptor affects the entire string not just
> the immediately following edit descriptor.
>From gcc-bugs-return-641238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:48:34 2019
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From: "perini at wisc dot edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/90150] wrong output produced by float format fX.Y descriptor following translated scientific format XpeY.Z
Date: Thu, 18 Apr 2019 19:48:00 -0000
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--- Comment #4 from federico <perini at wisc dot edu> ---
uhm so that is my fault, I guess - sorry about that.
Apparently this is what the FORTRAN standard features. Still, I’m a bit
confused that the P descriptor produces only a format change with the E format,
while leading to a _value_ change with F.
Federico Perini
________________________________
From: sgk at troutmask dot apl.washington.edu <gcc-bugzilla@gcc.gnu.org>
Sent: Thursday, April 18, 2019 9:40:05 PM
To: Federico Perini
Subject: [Bug fortran/90150] wrong output produced by float format fX.Y
descriptor following translated scientific format XpeY.Z
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90150
--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Thu, Apr 18, 2019 at 07:27:31PM +0000, perini at wisc dot edu wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90150
>
> --- Comment #2 from federico <perini at wisc dot edu> ---
> Number b=10.0, so in format f8.3 it should always be output as “ 10.000†?
Ahem, no. 1p changes the scale factor by 10. 2p changes
scale factor to 100. The scale factor is a property of
the output connection. So, 1p and 2p apply to both e10.3
and f8.3 in your format strings.
>> $ a.exe
>> 0.100E+04 10.000 ! "(1e10.3,1x,f8.3)"
>> 1.000E+03 100.000 ! "(1pe10.3,1x,f8.3)"
Perhaps, you want '(1pe10.3,1x,0pf8.3)'
>> 10.00E+02 1000.000 ! "(2pe10.3,1x,f8.3)"
Perhaps, you want '(2pe10.3,1x,0pf8.3)'
> Can you explain what you think the compiler should output?
>
> The P edit descriptor affects the entire string not just
> the immediately following edit descriptor.
--
You are receiving this mail because:
You reported the bug.
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Subject: [Bug translation/90160] missing quote in diagnostic
Date: Thu, 18 Apr 2019 19:50:00 -0000
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
From gcn.c:
error ("unknown specifier %s in amdgpu_hsa_kernel attribute", str);
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From: "haining.cpp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87652] [8 Regression] inner class template of outer class template can't access friend's protected data member
Date: Thu, 18 Apr 2019 19:50:00 -0000
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--- Comment #7 from Ryan R Haining <haining.cpp at gmail dot com> ---
Still fails in 8.3.0 https://wandbox.org/permlink/69kAYkUWgFD5TTxs
>From gcc-bugs-return-641241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:51:37 2019
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Subject: [Bug translation/90158] aarch64: wrong quotation in diagnostics
Date: Thu, 18 Apr 2019 19:51:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-18
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Let me add the \"%s\" pattern to my diagnostic checker to flag
outside %< and %>.
I'll see if also flagging plain either %s or " %s " wouldn't cause too many
false positives for valid uses.
>From gcc-bugs-return-641242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:54:14 2019
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Subject: [Bug c++/87651] [8 Regression] inner class with template template friend declaration of same name fails to compile
Date: Thu, 18 Apr 2019 19:54:00 -0000
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--- Comment #5 from Ryan R Haining <haining.cpp at gmail dot com> ---
Failing on 8.3.0 https://wandbox.org/permlink/69kAYkUWgFD5TTxs
>From gcc-bugs-return-641244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:55:43 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90150] wrong output produced by float format fX.Y descriptor following translated scientific format XpeY.Z
Date: Thu, 18 Apr 2019 19:55:00 -0000
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--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Thu, Apr 18, 2019 at 07:48:25PM +0000, perini at wisc dot edu wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90150
>
> --- Comment #4 from federico <perini at wisc dot edu> ---
> uhm so that is my fault, I guess - sorry about that.
>
> Apparently this is what the FORTRAN standard features. Still,
> I’m a bit confused that the P descriptor produces only a format
> change with the E format, while leading to a _value_ change with F.
>
It is not a value in change. You have asked the compiler
to scale the output of the F edit descriptor. It is
assumed that you, the programmer, know that the output
value has been scaled. For example, 1p causes b=10.0
to be output as 100.000, but you know the true value is
10.000.
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Subject: [Bug c++/90161] New: GCC does not always dllexport constexpr member variables in C++17 mode
Date: Thu, 18 Apr 2019 19:55:00 -0000
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Bug ID: 90161
Summary: GCC does not always dllexport constexpr member
variables in C++17 mode
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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$ cat x.cpp
struct __attribute__((dllexport)) foo {
static constexpr int i = 3;
};
constexpr int foo::i;
$ cat y.cpp
struct __attribute__((dllimport)) foo {
static constexpr int i = 3;
};
int main() {
volatile auto v = &foo::i;
}
$ i686-w64-mingw32-g++ x.cpp -shared -o libx.dll
$ i686-w64-mingw32-g++ y.cpp -o y.exe -L. -lx
$ rm -f libx.dll y.exe
$ i686-w64-mingw32-g++ -std=c++17 x.cpp -shared -o libx.dll
$ i686-w64-mingw32-g++ -std=c++17 y.cpp -o y.exe -L. -lx
/usr/lib/gcc/i686-w64-mingw32/8.3.0/../../../../i686-w64-mingw32/bin/ld:
/tmp/cc8oSAlw.o:y.cpp:(.text+0xf): undefined reference to `_imp___ZN3foo1iE'
collect2: error: ld returned 1 exit status
$ i686-w64-mingw32-g++ -v
Using built-in specs.
COLLECT_GCC=i686-w64-mingw32-g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-w64-mingw32/8.3.0/lto-wrapper
Target: i686-w64-mingw32
Configured with: /home/marc/.cache/aurman/mingw-w64-gcc/src/gcc/configure
--prefix=/usr --libexecdir=/usr/lib --target=i686-w64-mingw32
--enable-languages=c,lto,c++,objc,obj-c++,fortran,ada --enable-shared
--enable-static --enable-threads=posix --enable-fully-dynamic-string
--enable-libstdcxx-time=yes --with-system-zlib --enable-cloog-backend=isl
--enable-lto --enable-dw2-exceptions --disable-sjlj-exceptions --enable-libgomp
--disable-multilib --enable-checking=release
Thread model: posix
gcc version 8.3.0 (GCC)
This difference is likely because in C++17, foo::i is an inline variable due to
being constexpr. If there is a function in libx.dll which uses foo::i's
address, the address is exported properly and linking y.exe works fine. This
works fine on Linux using the visibility attribute. GCC appears to have
stopped exporting foo::i in GCC 7 (https://godbolt.org/z/yatDtS).
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90160] missing quote in diagnostic
Date: Thu, 18 Apr 2019 19:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90160
--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
From gcn.c, one more:
error ("duplicated parameter specifier %s in amdgpu_hsa_kernel "
"attribute", str);
>From gcc-bugs-return-641246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 19:57:27 2019
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Subject: [Bug translation/90162] New: exclamation mark in diagnostic!!!!!1111!!!!
Date: Thu, 18 Apr 2019 19:57:00 -0000
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Bug ID: 90162
Summary: exclamation mark in diagnostic!!!!!1111!!!!
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From h8300.c:
warning (OPT_mno_exr, "%<-mno-exr%> valid only with %<-ms%> or "
"%<-msx%> - Option ignored!");
Diagnostics should not contain any exclamation mark.
>From gcc-bugs-return-641247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:01:57 2019
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Subject: [Bug translation/90160] missing quote in diagnostic
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-18
CC| |msebor at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=90158
Ever confirmed|0 |1
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. See also pr90158 for similar issues.
>From gcc-bugs-return-641249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:06:48 2019
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Subject: [Bug translation/90156] add linter check suggesting to replace %<%s%> with %qs
Date: Thu, 18 Apr 2019 20:06:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |ASSIGNED
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CC| |msebor at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I'm working on it for GCC 10.
>From gcc-bugs-return-641248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:06:37 2019
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Subject: [Bug translation/90163] New: untranslated placeholder in warn_once_call_ms2sysv_xlogues
Date: Thu, 18 Apr 2019 20:06:00 -0000
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Bug ID: 90163
Summary: untranslated placeholder in
warn_once_call_ms2sysv_xlogues
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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From i386.c:
static void warn_once_call_ms2sysv_xlogues (const char *feature)
{
static bool warned_once = false;
if (!warned_once)
{
warning (0, "%<-mcall-ms2sysv-xlogues%> is not compatible with %s",
feature);
warned_once = true;
}
}
warn_once_call_ms2sysv_xlogues ("__builtin_eh_return");
warn_once_call_ms2sysv_xlogues ("static call chains");
warn_once_call_ms2sysv_xlogues ("-fsplit-stack");
The placeholder "feature" can be practically anything. The name of an
intrinsic, a fragment of an English sentence or a command line option.
The fragment of the English sentence doesn't make sense when it is translated.
The %s placeholder must be a %qs, and then the diagnostic becomes:
%<-mcall-ms2sysv-xlogues%> is not compatible with %<static call chains%>
This breaks the English sentence and is impossible to translate into other
languages.
>From gcc-bugs-return-641250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:07:00 2019
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Thu, 18 Apr 2019 20:07:00 -0000
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--- Comment #7 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Sat, 13 Apr 2019, bafap5 at yahoo dot com wrote:
> int x = sizeof ((int8_t) 5); /* Correct, gives 1 */
> int y = sizeof (INT8_C(5)); /* Incorrect, gives 4 */
No, INT8_C(5) must expand to have type int, not int_least8_t, if
int_least8_t promotes to int. See 7.20.4#3, "The type of the expression
shall have the same type as would an expression of the corresponding type
converted according to the integer promotions.". *Not* the type itself,
the promoted type.
I think expanding the macro to its argument is clearly correct here,
including for UINT8_C, as the interpretation suggested in DR#456
regarding having an unsigned type in #if leads to the obvious absurdities
I described in reflector message 13320 (15 May 2014).
>From gcc-bugs-return-641251-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:08:41 2019
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Subject: [Bug translation/90158] aarch64: wrong quotation in diagnostics
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Blocks| |90156
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
See pr90156 for the general request to add a checker for these misquoting
patterns.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90156
[Bug 90156] add linter check suggesting to replace %<%s%> with %qs
>From gcc-bugs-return-641252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:09:51 2019
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Subject: [Bug translation/90164] New: wrong tense in ABI change diagnostic
Date: Thu, 18 Apr 2019 20:09:00 -0000
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Bug ID: 90164
Summary: wrong tense in ABI change diagnostic
Product: gcc
Version: 9.0
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From i386.c:
warning (OPT_Wabi, "empty class %qT parameter passing ABI "
"changes in %<-fabi-version=12%> (GCC 8)", type);
Since the current GCC version is 9, "changes" should be "changed".
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Subject: [Bug translation/90162] exclamation mark in diagnostic!!!!!1111!!!!
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-18
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The -Wformat-diag checker I'm working on detects this. The
capitalization should also be corrected.
>From gcc-bugs-return-641254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:15:29 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90148] Closing quote in wrong position in plugin.c
Date: Thu, 18 Apr 2019 20:15:00 -0000
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
From m68k.c:
error ("%<-mpcrel%> %<-fPIC%> is not currently supported on selected cpu");
>From gcc-bugs-return-641255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:26:42 2019
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/89797] ICE on a vector_size (1LU << 33) int variable
Date: Thu, 18 Apr 2019 20:26:00 -0000
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Thu Apr 18 20:26:07 2019
New Revision: 270447
URL: https://gcc.gnu.org/viewcvs?rev=270447&root=gcc&view=rev
Log:
PR middle-end/89797 - ICE on a vector_size (1LU << 33) int variable
gcc/ChangeLog:
* tree.h (TYPE_VECTOR_SUBPARTS): Use HOST_WIDE_INT_1U.
* config/aarch64/aarch64.c (aarch64_simd_vector_alignment): Avoid
assuming type size fits in SHWI.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.c
trunk/gcc/tree.h
>From gcc-bugs-return-641256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 20:44:21 2019
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From: "harald at gigawatt dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Thu, 18 Apr 2019 20:44:00 -0000
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--- Comment #8 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to joseph@codesourcery.com from comment #7)
> No, INT8_C(5) must expand to have type int, not int_least8_t, if
> int_least8_t promotes to int. See 7.20.4#3, "The type of the expression
> shall have the same type as would an expression of the corresponding type
> converted according to the integer promotions.". *Not* the type itself,
> the promoted type.
Good point, my earlier suggested definition is missing an extra + to handle
that.
> I think expanding the macro to its argument is clearly correct here,
> including for UINT8_C, as the interpretation suggested in DR#456
> regarding having an unsigned type in #if leads to the obvious absurdities
> I described in reflector message 13320 (15 May 2014).
That pre-dates the DR's proposed committee response, which is from Oct 2014.
Are absurdities not just the natural result of requiring all preprocessor
number processing to be done in (u)intmax_t? We already have the situation that
e.g. 0U > -1LL is required (under obvious assumptions about type widths) to
give different results in #if expressions than outside of them, and GCC
implements that.
>From gcc-bugs-return-641257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 21:04:06 2019
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Thu, 18 Apr 2019 21:04:00 -0000
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--- Comment #9 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Thu, 18 Apr 2019, harald at gigawatt dot nl wrote:
> > I think expanding the macro to its argument is clearly correct here,
> > including for UINT8_C, as the interpretation suggested in DR#456
> > regarding having an unsigned type in #if leads to the obvious absurdities
> > I described in reflector message 13320 (15 May 2014).
>
> That pre-dates the DR's proposed committee response, which is from Oct 2014.
I don't think the committee response paid any attention to the points I
raised; I think a supposition that compiler magic would be needed is
inaccurate as the proper reading of the changes in the C99 TCs is that
they specifically avoid needing such magic. In any case, it says nothing
about the types of these macros in #if. I agree with the conclusion that
there is no defect (as I think the common-sense reading of the standard
text is that the promoted type is the result of promoting outside #if,
just like the limits are the limits of the type outside #if - the limits
being otherwise would contradict express normative text about the values
of certain macros).
>From gcc-bugs-return-641258-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 21:06:21 2019
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/90037] [9 Regression] -Wnull-dereference false positive after r269302
Date: Thu, 18 Apr 2019 21:06:00 -0000
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--- Comment #13 from Jeffrey A. Law <law at redhat dot com> ---
So results from playing with do_rpo_vn.
Running do_rpo_vn on the full function is slower than lattice cprop. It's on
the order of a percent or two. I mostly did this because it was trivial to
code up, verify it fixed the regression and see if performance was even in the
right ballpark.
Then I did a version which only called do_rpo_vn on blocks with single
predecessors that had PHI nodes. ie, the vast majority of degenerate PHI
cases. That still fixed the regression (as expected). Performance was ever so
slightly worse than doing a full function lattice cprop. Overall it's on the
order of .03%. THe resulting code is effectively the same as doing lattice
cprop.
So my current thought is to drop all the phi-only cprop code and use the
lattice cprop instead, adding a single call to the pass between DOM and path
isolation. The compile-time hit is going to be small, on the order of .4%. I
could be convinced to use rpo_vn as well -- it's ultimately a wash in terms of
compile-time and resulting code.
>From gcc-bugs-return-641259-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 21:24:46 2019
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From: "harald at gigawatt dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90081] stdint constant macros evaluating to wrong type
Date: Thu, 18 Apr 2019 21:24:00 -0000
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--- Comment #10 from Harald van Dijk <harald at gigawatt dot nl> ---
(In reply to joseph@codesourcery.com from comment #9)
Thanks, appreciate the explanation. I guess I'm less willing to trust that the
interpretation that makes sense is the one that's intended, but I can see that
either you're right or the requirements are unclear, and either of those leads
to the same conclusion here.
>From gcc-bugs-return-641260-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 21:48:47 2019
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From: "quicknir at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/78113] std::variant and std::visit's current implementations do not get optimized out (compared to "recursive visitation")
Date: Thu, 18 Apr 2019 21:48:00 -0000
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--- Comment #5 from Nir Friedman <quicknir at gmail dot com> ---
Jonathan, I saw you just change the status of this. Michael Park's and I work
has resulted in a different implementation of std::visit which has much better
codegen; also backed by performance numbers. This also improves perf for things
like comparison, since internally this uses the same mechanisms. We've actually
been trying to contact someone from clang and gcc standard libraries about this
for a while to no success... please feel free to email me at quicknir@gmail.com
to get the convo going about how to maybe merge some of that code in. Happy to
help with the actual merging work as well.
>From gcc-bugs-return-641261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 18 21:54:34 2019
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Subject: [Bug libstdc++/90165] New: std::variant constructs wrong alternative
Date: Thu, 18 Apr 2019 21:54:00 -0000
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Bug ID: 90165
Summary: std::variant constructs wrong alternative
Product: gcc
Version: 8.3.1
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#include <variant>
#include <stdio.h>
struct none { none() = delete; };
struct any { template <typename T> any(T&&) {} };
int main()
{
std::variant<none, any> v(std::in_place_type<none>);
std::variant<none, any> v2(std::in_place_index<0>);
printf("constructed alternatives %zu and %zu\n", v.index(), v2.index());
}
This program should be ill-formed, but instead compiles and outputs:
constructed alternatives 1 and 1
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Subject: [Bug translation/79878] verify_gimple_assign_single: replace error with internal_error
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
This predates pr90149 but that one has more detail so I'm resolving this as a
dupe of the latter.
*** This bug has been marked as a duplicate of bug 90149 ***
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Subject: [Bug translation/90149] diagnostics containing BIT_FIELD_REF don't conform to diagnostics guideline
Date: Thu, 18 Apr 2019 21:55:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 79878 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/90166] New: Compiler Fails at Assembler
Date: Thu, 18 Apr 2019 22:10:00 -0000
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Bug ID: 90166
Summary: Compiler Fails at Assembler
Product: gcc
Version: 8.3.0
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If I try to compile the following code (filename = hello.f90)
module subroutine hello
write(*,*) "hello"
end subroutine
with 'gfortran -c hello.f90' I get the assembler error
/tmp/ccrIt4g8.s: Assembler messages:
/tmp/ccrIt4g8.s:10: Error: junk at end of line, first unrecognized character
is `('
/tmp/ccrIt4g8.s:11: Error: unrecognized symbol type ""
/tmp/ccrIt4g8.s:11: Error: junk at end of line, first unrecognized character
is `('
/tmp/ccrIt4g8.s:12: Error: invalid character '(' in mnemonic
/tmp/ccrIt4g8.s:42: Error: expected comma after name `__' in .size directive
It is incorrect code, but I think the compiler should give the error, not the
assembler. In this case, it's incorrect to have the module attribute in front
of "subroutine hello".
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #55 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Thu Apr 18 22:14:17 2019
New Revision: 270448
URL: https://gcc.gnu.org/viewcvs?rev=270448&root=gcc&view=rev
Log:
PR rtl-optimization/87871
* ira-lives.c (make_object_dead): Don't add conflicts to
TOTAL_CONFLICT_HARD_REGS for register ignore_reg_for_conflicts.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ira-lives.c
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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--- Comment #56 from Peter Bergner <bergner at gcc dot gnu.org> ---
I committed the RA fix. Unassigning myself now.
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Subject: [Bug rtl-optimization/79405] [8/9/10 Regression] Infinite loop in fwprop
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
We have a fine workaround, committed ages ago, so this isn't a P1 anymore.
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Subject: [Bug c/90167] New: invalid example in GCC documentation wrt. effective type rules
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Bug ID: 90167
Summary: invalid example in GCC documentation wrt. effective
type rules
Product: gcc
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The gcc manual says the following under "-fstrict-aliasing"
<https://gcc.gnu.org/onlinedocs/gcc-8.3.0/gcc/Optimize-Options.html>:
> union a_union {
> int i;
> double d;
> };
>
> [...]
>
> Similarly, access by taking the address, casting the resulting pointer
> and dereferencing the result has undefined behavior, even if the cast
> uses a union type, e.g.:
>
> int f() {
> double d = 3.0;
> return ((union a_union *) &d)->i;
> }
I think this particular statement does not match the C99 standard. The
C99 standard says, under 6.5p7:
> An object shall have its stored value accessed only by an lvalue
> expression that has one of the following types:
> - a type compatible with the effective type of the object,
> - a qualified version of a type compatible with the effective type of
> the object,
> - a type that is the signed or unsigned type corresponding to the
> effective type of the object,
> - a type that is the signed or unsigned type corresponding to a
> qualified version of the effective type of the object,
> - an aggregate or union type that includes one of the aforementioned
> types among its members (including, recursively, a member of a
> subaggregate or contained union), or
> - a character type.
The object whose stored value we're accessing is the local variable "d".
The effective type of the local variable "d" is "double". (Because it
has a declared type, and so the declared type is the effective type.)
The expression (*(union a_union *)&d) is an lvalue expression.
The expression (*(union a_union *)&d) has type "union a_union", which is
a union type that includes "double" among its members (6.5p7 bullet 5).
The "double" type of the union member in question is compatible with the
"double" type of the object whose stored value we're accessing (6.5p7
bullet 1). That's because both "double" types are identical.
Finally, expression (((union a_union *)&d)->i) is equivalent to
((*(union a_union *)&d).i).
Therefore the example given by the gcc documentation is valid C, in my
opinion.
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Subject: [Bug fortran/90166] Compiler Fails at Assembler
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kargl at gcc dot gnu.org changed:
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--- Comment #1 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
ndex: decl.c
===================================================================
--- decl.c (revision 270181)
+++ decl.c (working copy)
@@ -7598,6 +7598,13 @@ gfc_match_subroutine (void)
if (m != MATCH_YES)
return m;
+ if (current_attr.module_procedure == 1
+ && gfc_current_state () != COMP_MODULE)
+ {
+ gfc_error ("MODULE SUBROUTINE found outside of a module at %C");
+ return MATCH_ERROR;
+ }
+
if (get_proc_name (name, &sym, false))
return MATCH_ERROR;
>From gcc-bugs-return-641271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 00:01:58 2019
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Subject: [Bug fortran/90166] Compiler Fails at Assembler
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--- Comment #2 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Thu, Apr 18, 2019 at 11:55:51PM +0000, sgk at troutmask dot
apl.washington.edu wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90166
>
> --- Comment #1 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
> ndex: decl.c
> ===================================================================
> --- decl.c (revision 270181)
> +++ decl.c (working copy)
> @@ -7598,6 +7598,13 @@ gfc_match_subroutine (void)
> if (m != MATCH_YES)
> return m;
>
> + if (current_attr.module_procedure == 1
> + && gfc_current_state () != COMP_MODULE)
This isn't quite right. A module subroutine can appear in
an interface statement.
>From gcc-bugs-return-641272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 00:08:52 2019
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Subject: [Bug libstdc++/90165] std::variant constructs wrong alternative
Date: Fri, 19 Apr 2019 00:08:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-19
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The variant(T&&) constructor is being selected by overload resolution, because
we talk to apply this constraint:
remove_Âcvref_Ât<T> is neither a specialization of in_Âplace_Âtype_Ât nor a
specialization of in_Âplace_Âindex_Ât,
>From gcc-bugs-return-641273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 01:09:30 2019
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90166] Compiler Fails at Assembler
Date: Fri, 19 Apr 2019 01:09:00 -0000
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--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Apr 19, 2019 at 12:01:55AM +0000, sgk at troutmask dot
apl.washington.edu wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90166
>
> --- Comment #2 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
> On Thu, Apr 18, 2019 at 11:55:51PM +0000, sgk at troutmask dot
> apl.washington.edu wrote:
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90166
> >
> > --- Comment #1 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
> > ndex: decl.c
> > ===================================================================
> > --- decl.c (revision 270181)
> > +++ decl.c (working copy)
> > @@ -7598,6 +7598,13 @@ gfc_match_subroutine (void)
> > if (m != MATCH_YES)
> > return m;
> >
> > + if (current_attr.module_procedure == 1
> > + && gfc_current_state () != COMP_MODULE)
>
> This isn't quite right. A module subroutine can appear in
> an interface statement.
>
This survives regression testing, but boy is it ugly.
Index: decl.c
===================================================================
--- decl.c (revision 270181)
+++ decl.c (working copy)
@@ -6103,6 +6103,19 @@ gfc_match_prefix (gfc_typespec *ts)
if (!gfc_notify_std (GFC_STD_F2008, "MODULE prefix at %C"))
goto error;
+ if (gfc_current_state () != COMP_MODULE
+ && gfc_current_state () != COMP_SUBMODULE
+ && gfc_current_state () != COMP_INTERFACE
+ && gfc_current_state () != COMP_CONTAINS
+ && !(gfc_state_stack->state == COMP_FUNCTION
+ && (gfc_state_stack->previous->state == COMP_INTERFACE
+ || gfc_state_stack->previous->state == COMP_CONTAINS)))
+ {
+ gfc_error ("MODULE prefix at %C found outside of a module, "
+ "submodule, or INTERFACE");
+ goto error;
+ }
+
current_attr.module_procedure = 1;
found_prefix = true;
}
>From gcc-bugs-return-641274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 02:12:38 2019
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Subject: [Bug translation/90164] wrong tense in ABI change diagnostic
Date: Fri, 19 Apr 2019 02:12:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-19
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. There seems to be little consistency between "changes" and "has
changed" -- it's 11 vs 6. But "has changed" seems more appropriate here
since/when it's still in effect in the current version.
$ grep " change[ds] " gcc/po/gcc.pot | grep ABI
msgid "AVX512F vector argument without AVX512F enabled changes the ABI"
msgid "AVX512F vector return without AVX512F enabled changes the ABI"
msgid "AVX vector argument without AVX enabled changes the ABI"
msgid "AVX vector return without AVX enabled changes the ABI"
msgid "SSE vector argument without SSE enabled changes the ABI"
msgid "SSE vector return without SSE enabled changes the ABI"
msgid "MMX vector argument without MMX enabled changes the ABI"
msgid "MMX vector return without MMX enabled changes the ABI"
"the ABI of passing struct with a flexible array member has changed in GCC 4.4"
msgid "the ABI of passing union with long double has changed in GCC 4.4"
"the ABI of passing structure with complex float member has changed in GCC 4.4"
"the ABI for passing parameters with %d-byte alignment has changed in GCC 4.6"
"empty class %qT parameter passing ABI changes in %<-fabi-version=12%> (GCC 8)"
msgid "target attribute or pragma changes AltiVec ABI"
msgid "target attribute or pragma changes darwin64 ABI"
"the ABI of passing aggregates with %d-byte alignment has changed in GCC 5"
msgid "the ABI of passing homogeneous float aggregates has changed in GCC 5"
>From gcc-bugs-return-641275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 02:27:58 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90166] Compiler Fails at Assembler
Date: Fri, 19 Apr 2019 02:27:00 -0000
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--- Comment #4 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Apr 19, 2019 at 01:09:25AM +0000, sgk at troutmask dot
apl.washington.edu wrote:
>
> This survives regression testing, but boy is it ugly.
>
> Index: decl.c
> ===================================================================
> --- decl.c (revision 270181)
> +++ decl.c (working copy)
> @@ -6103,6 +6103,19 @@ gfc_match_prefix (gfc_typespec *ts)
> if (!gfc_notify_std (GFC_STD_F2008, "MODULE prefix at %C"))
> goto error;
>
> + if (gfc_current_state () != COMP_MODULE
> + && gfc_current_state () != COMP_SUBMODULE
> + && gfc_current_state () != COMP_INTERFACE
> + && gfc_current_state () != COMP_CONTAINS
This is likely incorrect. A CONTAINS can appear in the program,
a subroutine, or function. Need to check that the CONTAINS is
with a module.
That is, someone could do
function foo
contains
module subroutine bar
end subroutine bar
end function foo
>From gcc-bugs-return-641276-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 03:15:47 2019
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From: "fxue at os dot amperecomputing.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90168] New: Unstable register allocation result for same source code
Date: Fri, 19 Apr 2019 03:15:00 -0000
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Bug ID: 90168
Summary: Unstable register allocation result for same source
code
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Supposed a function as the following, in which 'cond', 'S1' and 'S2' are
completely irrelevant, means they do not access same variables(in term of RA,
they own separate live range set).
f1()
{
if (cond) {
S1
} else {
S2
}
}
Ideally, we can expect that register allocation on 'S1'is totally independent
of 'S2', w or w/o which makes no difference. Its result should be same as below
function consisting of only 'S1':
f2()
{
S1
}
But we found gcc does not has this property. Strictly speaking, this is not a
bug, but exposes some kind of instability in code generation, has
undeterminable impact on some optimization, such as inlining.
A real example code is listed here (-m64 -O3, for x86-64). Besides different
register number assignments, RA generates different amount of register spills
for 'CODES', foo() has 3 spills and foo1() has only 2.
int value[10];
int count;
int user1;
int fncall(void);
#define CODES \
int i; \
int sum = 0; \
int lv_in_1 = value[1]; \
int lv_in_2 = value[2]; \
int lv_in_3 = value[3]; \
int lv_in_4 = value[4]; \
int lv_in_5 = value[5]; \
int lv_in_6 = value[6]; \
int lv_in_7 = value[7]; \
\
for (i = 0; i < count; i++) { \
int j; \
sum += lv_in_1; \
sum += lv_in_2; \
sum += lv_in_3; \
sum += lv_in_4; \
sum += lv_in_5; \
sum += lv_in_6; \
sum += lv_in_7; \
\
for (j = 0; j < 16; j++) { \
fncall(); \
sum += lv_in_1 ^ j; \
sum += lv_in_2 ^ j; \
sum += lv_in_3 ^ j; \
sum += lv_in_4 ^ j; \
sum += lv_in_5 ^ j; \
sum += lv_in_6 ^ j; \
sum += lv_in_7 ^ j; \
} \
\
lv_in_1 ^= i; \
lv_in_2 ^= i; \
lv_in_3 ^= i; \
lv_in_4 ^= i; \
lv_in_5 ^= i; \
lv_in_6 ^= i; \
lv_in_7 ^= i; \
} \
user1 = sum
void foo()
{
CODES;
}
int cond;
int user2;
void foo1()
{
if (cond == 5) {
CODES;
} else {
unsigned long long i, j;
for (i = 0; i < 100000000; i++) {
for (j = 0; j < 100000000; j++) {
user2 += i * j;
}
}
}
}
Investigation shows this is related to integer-based frequency normalization
(REG_FREQ_FROM_BB) used by RA, which always rounds up a small frequency (less
than 1) to 1. In foo1(), introduction of new code makes profile counts of CODES
be decreased, so that impact of frequency normalization error becomes more
significant and actually distorts original proportion of profile counts among
basic blocks in CODES. For example, in foo(), two blocks have counts of 3 and
100 receptively, and in foo1(), they become 0.3 and 10, after rounding up, they
are 1 and 10, thus proportion is changed from (3 vs 100) to (1 vs 10).
Possible solution might be to adjust two scale factors used by REG_FREQ_FROM_BB
: REG_FREQ_MAX and BB_FREQ_MAX, or to use float type to hold frequency?
>From gcc-bugs-return-641277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 03:29:52 2019
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From: "menospaamthereaper at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90169] New: allocatable character in type
Date: Fri, 19 Apr 2019 03:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90169
Bug ID: 90169
Summary: allocatable character in type
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: menospaamthereaper at hotmail dot com
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The following code does not produce the correct result on gfortran 7.3.0 (and
probably other versions):
Program Main
implicit none
type str
character(len=:),allocatable :: CStr(:)
end type
type(str) :: tstr
allocate(character(len=2) :: tstr%CStr(2))
tstr%CStr(1) = "20"
tstr%CStr(2) = "30"
print *,'First: ',tstr%CStr(1)
print *,'Second:',tstr%CStr(2)
End Program Main
The expected result is
First: 20
Second:30
but the actual result is
First: 30
Second:30
Note that this works as expected if CStr is not inside of a type. The details
used in this example of the length, etc. do not matter.
(This problem is also listed in 78578 but was not perhaps properly discussed
and so was marked resolved / invalid)
>From gcc-bugs-return-641278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 03:49:45 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90170] New: [7/8/9 Regression] ICE in unify, at cp/pt.c:22209
Date: Fri, 19 Apr 2019 03:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90170
Bug ID: 90170
Summary: [7/8/9 Regression] ICE in unify, at cp/pt.c:22209
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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g++-9.0.0-alpha20190414 snapshot (r270355) ICEs when compiling the following
testcase extracted from test/SemaTemplate/temp_arg_nontype.cpp from the clang
8.0.0 test suite w/ -std=c++17:
namespace partial_order_different_types {
template<int, int, typename T, typename, T> struct A;
// FIXME: It appears that this partial specialization should be ill-formed as
// it is not more specialized than the primary template. V is not deducible
// because it does not have the same type as the corresponding parameter.
template<int N, typename T, typename U, U V> struct A<0, N, T, U, V> {}; //
expected-note {{matches}}
}
% g++-9.0.0-alpha20190414 -std=c++17 -c zaccgjmf.cpp
zaccgjmf.cpp:7:55: internal compiler error: in unify, at cp/pt.c:22209
7 | template<int N, typename T, typename U, U V> struct A<0, N, T, U, V>
{}; // expected-note {{matches}}
| ^~~~~~~~~~~~~~~~
0x620a62 unify
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:22209
0x9d05a8 unify
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:22391
0x9d0116 unify
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:22553
0x9d15ff get_partial_spec_bindings
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:23366
0x9f98fa process_partial_specialization
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:4883
0x9f9c45 push_template_decl_real(tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:5619
0x9fbeb7 push_template_decl_real(tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:5846
0x9fbeb7 push_template_decl(tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:5848
0x9fbeb7 push_template_decl(tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:5846
0x9fbeb7 maybe_process_partial_specialization(tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:1014
0x98d054 cp_parser_class_head
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:24021
0x98d054 cp_parser_class_specifier_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:23362
0x98d9d8 cp_parser_class_specifier
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:23686
0x98d9d8 cp_parser_type_specifier
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:17431
0x98e944 cp_parser_decl_specifier_seq
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:14124
0x9b0ba8 cp_parser_single_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:28177
0x9b0f3d cp_parser_template_declaration_after_parameters
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:27860
0x9b188e cp_parser_explicit_template_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:28106
0x9b188e cp_parser_template_declaration_after_export
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:28125
0x9b4459 cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:13187
It may be a duplicate of PR89480, though.
>From gcc-bugs-return-641279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 03:49:46 2019
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90171] New: [9 Regression] ICE in build_op_delete_call, at cp/call.c:6630
Date: Fri, 19 Apr 2019 03:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90171
Bug ID: 90171
Summary: [9 Regression] ICE in build_op_delete_call, at
cp/call.c:6630
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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g++-9.0.0-alpha20190414 snapshot (r270355) ICEs when compiling the following
testcase extracted from test/SemaCXX/cxx2a-destroying-delete.cpp from the clang
8.0.0 test suite w/ -std=c++17:
namespace std {
using size_t = decltype(sizeof(0));
enum class align_val_t : size_t;
struct destroying_delete_t { };
}
struct A {
void operator delete(A*, std::destroying_delete_t, std::align_val_t);
void operator delete(A*, std::destroying_delete_t, std::size_t,
std::align_val_t);
};
void delete_A(A *a) { delete a; }
% g++-9.0.0-alpha20190414 -std=c++17 -c hmayxrtu.cpp
hmayxrtu.cpp: In function 'void delete_A(A*)':
hmayxrtu.cpp:13:30: internal compiler error: in build_op_delete_call, at
cp/call.c:6630
13 | void delete_A(A *a) { delete a; }
| ^
0x5a373b build_op_delete_call(tree_code, tree_node*, tree_node*, bool,
tree_node*, tree_node*, int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/call.c:6630
0x937168 build_delete(tree_node*, tree_node*, special_function_kind, int, int,
int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/init.c:4849
0x9a7e3e cp_parser_unary_expression
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:8209
0x9802d2 cp_parser_cast_expression
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:9357
0x980b7a cp_parser_binary_expression
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:9460
0x981bb6 cp_parser_assignment_expression
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:9758
0x981f39 cp_parser_expression
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:9925
0x985455 cp_parser_expression_statement
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:11514
0x9912ec cp_parser_statement
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:11310
0x9929e8 cp_parser_statement_seq_opt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:11657
0x992ac8 cp_parser_compound_statement
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:11611
0x9ac975 cp_parser_function_body
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:22660
0x9ac975 cp_parser_ctor_initializer_opt_and_function_body
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:22711
0x9ad2d6 cp_parser_function_definition_after_declarator
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:27802
0x9ae0ac cp_parser_function_definition_from_specifiers_and_declarator
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:27718
0x9ae0ac cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:20297
0x98f245 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:13541
0x9b432d cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:13238
0x9b4ac1 cp_parser_translation_unit
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:4701
0x9b4ac1 c_parse_file()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:41181
>From gcc-bugs-return-641281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 03:49:49 2019
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Subject: [Bug c++/90173] New: [9 Regression] ICE: Segmentation fault (in strip_declarator_types)
Date: Fri, 19 Apr 2019 03:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90173
Bug ID: 90173
Summary: [9 Regression] ICE: Segmentation fault (in
strip_declarator_types)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: error-recovery, ice-on-invalid-code
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g++-9.0.0-alpha20190414 snapshot (r270355) ICEs when compiling the following
testcase extracted from test/Parser/cxx1z-class-template-argument-deduction.cpp
from the clang 8.0.0 test suite w/ -std=c++17:
template <typename T> struct A { };
A(int) -> A<int>;
namespace decl {
A (*fp)() = 0;
}
% g++-9.0.0-alpha20190414 -std=c++17 -c yuz02xm1.cpp
yuz02xm1.cpp:6:3: error: template placeholder type 'A<...auto...>' must be
followed by a simple declarator-id
6 | A (*fp)() = 0;
| ^
yuz02xm1.cpp:1:30: note: 'template<class T> struct A' declared here
1 | template <typename T> struct A { };
| ^
yuz02xm1.cpp:6:15: error: conversion from 'int' to non-scalar type 'A<int>'
requested
6 | A (*fp)() = 0;
| ^
yuz02xm1.cpp:6:15: internal compiler error: Segmentation fault
0xf780df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/toplev.c:326
0x9ada1f strip_declarator_types
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:20058
0x9ada1f cp_parser_init_declarator
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:20559
0x98f245 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:13541
0x9b432d cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:13238
0x9b4eeb cp_parser_declaration_seq_opt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:13114
0x9b4eeb cp_parser_namespace_body
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:19327
0x9b4eeb cp_parser_namespace_definition
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:19305
0x9b4440 cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:13218
0x9b4ac1 cp_parser_translation_unit
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:4701
0x9b4ac1 c_parse_file()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/parser.c:41181
0xabe3eb c_common_parse_file()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/c-family/c-opts.c:1156
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90172] New: [9 Regression] ICE: Segmentation fault (in contains_struct_check)
Date: Fri, 19 Apr 2019 03:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90172
Bug ID: 90172
Summary: [9 Regression] ICE: Segmentation fault (in
contains_struct_check)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: error-recovery
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
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g++-9.0.0-alpha20190414 snapshot (r270355) ICEs when compiling the following
testcase extracted from test/SemaCXX/cxx1y-generic-lambdas.cpp from the clang
8.0.0 test suite w/ -std=c++17:
template<class ... Ts> int fooV(Ts ... ts) {
auto L = [](auto ... a) {
auto M = [](decltype(a) ... b) -> void {
};
return M;
};
decltype(L(L, ts...)) (*fp)(decltype(L), decltype(ts) ...) = L;
return 0;
}
int run2 = fooV("BC", 3, 2.77, 'A', float{}, short{}, unsigned{});
% g++-9.0.0-alpha20190414 -std=c++17 -c mziudrma.cpp
mziudrma.cpp: In instantiation of 'int fooV(Ts ...) [with Ts = {const char*,
int, double, char, float, short int, unsigned int}]':
mziudrma.cpp:13:65: required from here
mziudrma.cpp:3:14: error: expansion pattern 'decltype (#'nontype_argument_pack'
not supported by dump_expr#<expression error>)' contains no parameter packs
3 | auto M = [](decltype(a) ... b) -> void {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 | };
| ~
mziudrma.cpp: In instantiation of 'static constexpr decltype (((const fooV(Ts
...) [with Ts = {const char*, int, double, char, float, short int, unsigned
int}]::<lambda(auto:1 ...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&>(fooV::__lambda2::_FUN::<unnamed>) ...)) fooV(Ts ...)
[with Ts = {const char*, int, double, char, float, short int, unsigned
int}]::<lambda(auto:1 ...)>::_FUN(auto:1 ...) [with auto:1 = {fooV(Ts ...)
[with Ts = {const char*, int, double, char, float, short int, unsigned
int}]::<lambda(auto:1 ...)>, const char*, int, double, char, float, short int,
unsigned int}; decltype (((const fooV(Ts ...) [with Ts = {const char*, int,
double, char, float, short int, unsigned int}]::<lambda(auto:1
...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&>(fooV::__lambda2::_FUN::<unnamed>) ...)) = void]':
mziudrma.cpp:2:12: required from 'constexpr fooV(Ts ...) [with Ts = {const
char*, int, double, char, float, short int, unsigned int}]::<lambda(auto:1
...)>::operator decltype (((const fooV(Ts ...) [with Ts = {const char*, int,
double, char, float, short int, unsigned int}]::<lambda(auto:1
...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&>(fooV::__lambda2::_FUN::<unnamed>) ...)) (*)(auto:1
...)() const [with auto:1 = {fooV(Ts ...) [with Ts = {const char*, int, double,
char, float, short int, unsigned int}]::<lambda(auto:1 ...)>, const char*, int,
double, char, float, short int, unsigned int}; decltype (((const fooV(Ts ...)
[with Ts = {const char*, int, double, char, float, short int, unsigned
int}]::<lambda(auto:1 ...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&>(fooV::__lambda2::_FUN::<unnamed>) ...)) = void]'
mziudrma.cpp:8:27: required from 'int fooV(Ts ...) [with Ts = {const char*,
int, double, char, float, short int, unsigned int}]'
mziudrma.cpp:13:65: required from here
mziudrma.cpp:2:12: internal compiler error: Segmentation fault
2 | auto L = [](auto ... a) {
| ^~~~~~~~~~~~~~~~
3 | auto M = [](decltype(a) ... b) -> void {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 | };
| ~~
5 | return M;
| ~~~~~~~~~
6 | };
| ~
0xf780df crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/toplev.c:326
0x87eb94 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/tree.h:3289
0x87eb94 build_call_a(tree_node*, int, tree_node**)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/call.c:396
0x9d5142 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:18886
0x9df6af tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:18238
0x9df6af tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:17914
0x9e0ed6 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:17030
0x9df721 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:17321
0x9df096 instantiate_decl(tree_node*, bool, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:24774
0xa0569b instantiate_pending_templates(int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/pt.c:24890
0x91e770 c_parse_final_cleanups()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cp/decl2.c:4818
>From gcc-bugs-return-641282-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 04:02:20 2019
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Subject: [Bug middle-end/64122] ICE: tree check: expected tree that contains 'decl common' structure, have 'ssa_name' in prepare_gimple_addressable, at gimplify.c:3228 with -fgnu-tm
Date: Fri, 19 Apr 2019 04:02:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
I can reproduce it only on the 4.9 and 5 branches.
>From gcc-bugs-return-641283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 04:11:44 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90169] Setting an allocatable variable length character array in a type incorrectly sets all members of the array
Date: Fri, 19 Apr 2019 04:11:00 -0000
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kargl at gcc dot gnu.org changed:
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Resolution|--- |INVALID
--- Comment #1 from kargl at gcc dot gnu.org ---
The problem is fixed on trunk. Don't know if anyone intends to back port.
Doubt it as no one has done so.
PR 78578 is irrelevant as the individual who submitted
the testcase has a typo in his/her code.
>From gcc-bugs-return-641284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 05:42:57 2019
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From: "fxue at os dot amperecomputing.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90174] New: Bad register spill due to top-down allocation order
Date: Fri, 19 Apr 2019 05:42:00 -0000
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Bug ID: 90174
Summary: Bad register spill due to top-down allocation order
Product: gcc
Version: unknown
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Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
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Current regional RA uses a top-down allocation order, which may not properly
split a long live range that crosses sub-region with high register pressure.
In the following graph, lv0 is live in whole outer region, and suppose inner
region is under high register pressure due to lots of live ranges inside it.
According to RA algorithm, out region is processed firstly, lv0 is picked up as
spill candidate. And then turn to inner region, also the part of lv0 in inner
region is marked as being spilled. Finally result is that the whole lv0 should
be spilled. But if in area excluding inner region, there is with low register
pressure, we can get a better choice to place lv0 in register instead of
memory, and only spill/reload lv0 at boundary of entry-into(A)/exist-from(B)
inner region. In other word, inner region boundary are split points for lv0.
|
outer | lv0
region | __________ split point
|/
.----------A---------------.
| | |
| | | | |
| inner | | lv1 | |
| region | | | |
| | | lv2 | |
| | | | |
| | |
'----------B---------------'
|\__________
| split point
|
Here is an example to show this. gcc produces bad spills as we point out(-m64
-O3, for x86-64), but llvm generates better spill/reload as we expect.
int value[20];
int user0;
int user1;
int user2[100];
int user3;
int fncall(void);
void foo(int cond)
{
int lv_out = value[0];
int i;
user0 = lv_out; /* Better to place lv_out in register. */
if (cond) {
int sum = 0;
int lv_in_1 = value[1];
int lv_in_2 = value[2];
int lv_in_3 = value[3];
int lv_in_4 = value[4];
int lv_in_5 = value[5];
int lv_in_6 = value[6];
int lv_in_7 = value[7];
int lv_in_8 = value[8];
int lv_in_9 = value[9];
int lv_in_10 = value[10];
int lv_in_11 = value[11];
int lv_in_12 = value[12];
int lv_in_13 = value[13];
int lv_in_14 = value[14];
int lv_in_15 = value[15];
/* Better to spill lv_out here */
for (i = 0; i < 1000; i++) {
sum += lv_in_1;
sum += lv_in_2;
sum += lv_in_3;
sum += lv_in_4;
sum += lv_in_5;
sum += lv_in_6;
sum += lv_in_7;
sum += lv_in_8;
sum += lv_in_9;
sum += lv_in_10;
sum += lv_in_11;
sum += lv_in_12;
sum += lv_in_13;
sum += lv_in_14;
sum += lv_in_15;
fncall();
lv_in_1 ^= i;
lv_in_2 ^= i;
lv_in_3 ^= i;
lv_in_4 ^= i;
lv_in_5 ^= i;
lv_in_6 ^= i;
lv_in_7 ^= i;
lv_in_8 ^= i;
lv_in_9 ^= i;
lv_in_10 ^= i;
lv_in_11 ^= i;
lv_in_12 ^= i;
lv_in_13 ^= i;
lv_in_14 ^= i;
lv_in_15 ^= i;
}
/* Better to reload lv_out here */
user1 = sum;
}
for (i = 0; i < 100; i++) {
user2[i ^ 100] = lv_out; /* Better to place lv_out in register */
}
user3 = lv_out; /* Better to place lv_out in register */
}
For top-down allocation, we can only adjust inner region allocation result, but
no way to refine decision that has been made on outside live-range, it is an
intrinsic weakness of the top-down algorithm. To fix that, we may need to add a
new pass to explicitly split live ranges based on region boundary, or adopt a
reverse means, from inner to outer to perform allocation.
>From gcc-bugs-return-641285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 05:44:15 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Fri, 19 Apr 2019 05:44:00 -0000
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--- Comment #71 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
I am sorry, but my native arm bootstrap Fails:
g++ -std=gnu++98 -fno-PIE -c -I../../gcc-trunk-r270444/gcc/../libgcc
-DEH_MECHANISM_arm -DIN_GCC_FRONTEND -g -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common
-DHAVE_CONFIG_H -I. -Iada -I../../gcc-trunk-r270444/gcc
-I../../gcc-trunk-r270444/gcc/ada -I../../gcc-trunk-r270444/gcc/../include
-I../../gcc-trunk-r270444/gcc/../libcpp/include
-I/home/ed/gnu/gcc-build-arm-linux-gnueabihf/./gmp
-I/home/ed/gnu/gcc-trunk-r270444/gmp
-I/home/ed/gnu/gcc-build-arm-linux-gnueabihf/./mpfr/src
-I/home/ed/gnu/gcc-trunk-r270444/mpfr/src
-I/home/ed/gnu/gcc-trunk-r270444/mpc/src
-I../../gcc-trunk-r270444/gcc/../libdecnumber
-I../../gcc-trunk-r270444/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../gcc-trunk-r270444/gcc/../libbacktrace
-I/home/ed/gnu/gcc-build-arm-linux-gnueabihf/./isl/include
-I/home/ed/gnu/gcc-trunk-r270444/isl/include -o ada/raise-gcc.o -MT
ada/raise-gcc.o -MMD -MP -MF ada/.deps/raise-gcc.TPo
../../gcc-trunk-r270444/gcc/ada/raise-gcc.c
g++ -std=gnu++98 -fno-PIE -c -DIN_GCC_FRONTEND -g -DIN_GCC -fno-exceptions
-fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common
-DHAVE_CONFIG_H -I. -Iada -I../../gcc-trunk-r270444/gcc
-I../../gcc-trunk-r270444/gcc/ada -I../../gcc-trunk-r270444/gcc/../include
-I../../gcc-trunk-r270444/gcc/../libcpp/include
-I/home/ed/gnu/gcc-build-arm-linux-gnueabihf/./gmp
-I/home/ed/gnu/gcc-trunk-r270444/gmp
-I/home/ed/gnu/gcc-build-arm-linux-gnueabihf/./mpfr/src
-I/home/ed/gnu/gcc-trunk-r270444/mpfr/src
-I/home/ed/gnu/gcc-trunk-r270444/mpc/src
-I../../gcc-trunk-r270444/gcc/../libdecnumber
-I../../gcc-trunk-r270444/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../gcc-trunk-r270444/gcc/../libbacktrace
-I/home/ed/gnu/gcc-build-arm-linux-gnueabihf/./isl/include
-I/home/ed/gnu/gcc-trunk-r270444/isl/include -o ada/seh_init.o -MT
ada/seh_init.o -MMD -MP -MF ada/.deps/seh_init.TPo
../../gcc-trunk-r270444/gcc/ada/seh_init.c
../../gcc-trunk-r270444/gcc/ada/raise-gcc.c:1165:55: error: unknown target
attribute or pragma 'general-regs-only'
1165 | struct _Unwind_Context* uw_context ATTRIBUTE_UNUSED)
| ^
../../gcc-trunk-r270444/gcc/ada/raise-gcc.c:1183:32: error: unknown target
attribute or pragma 'general-regs-only'
1183 | _Unwind_Context *uw_context)
| ^
../../gcc-trunk-r270444/gcc/ada/raise-gcc.c:1354:43: error: unknown target
attribute or pragma 'general-regs-only'
1354 | struct _Unwind_Context* uw_context)
| ^
make[3]: *** [ada/raise-gcc.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/ed/gnu/gcc-build-arm-linux-gnueabihf'
make: *** [all] Error 2
>From gcc-bugs-return-641286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 05:54:13 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Fri, 19 Apr 2019 05:54:00 -0000
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--- Comment #72 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
I use host Compiler from last week:
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/ed/gnu/arm-linux-gnueabihf/libexec/gcc/armv7l-unknown-linux-gnueabihf/9.0.1/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-9-20190331/configure
--prefix=/home/ed/gnu/arm-linux-gnueabihf --enable-languages=all
--with-arch=armv7-a --with-tune=cortex-a9 --with-fpu=vfpv3-d16
--with-float=hard
Thread model: posix
gcc version 9.0.1 20190331 (experimental) (GCC)
and libgnat, is definietly affected since the personality function pushes d8-d9
>From gcc-bugs-return-641287-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 06:05:53 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #73 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Okay, the requirement is only to be able to boot-strap with
a released gcc version, so gcc-8 should not use the pragma,
while gcc-9 should use the pagma.
I was able to bootstrap from x86_64 -> arm cross -> arm native
that worked fine.
I will guard the pragma with a gcc-version check.
>From gcc-bugs-return-641288-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 06:08:21 2019
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Subject: [Bug c++/52961] Make -Wempty-body less noisy and enable it with -Wall
Date: Fri, 19 Apr 2019 06:08:00 -0000
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--- Comment #12 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #10)
> Clang... suggests placing the ";" on a different line to silence
> the warning:
>
>
> warning: if statement has empty body [-Wempty-body]
> if(a);
> ^
> note: put the semicolon on a separate line to silence this warning
>
> which seems a nicer way to silence the warning instead of ugly { ; }
That's a debatable opinion; I think the braces do a better job expressing
grouping
>From gcc-bugs-return-641289-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 06:16:03 2019
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Subject: [Bug translation/90163] untranslated placeholder in warn_once_call_ms2sysv_xlogues
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel.santos at pobox dot com,
| |egallager at gcc dot gnu.org
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
pretty sure Daniel Santos did this code
>From gcc-bugs-return-641290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 06:22:19 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46200|0 |1
is obsolete| |
--- Comment #74 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Created attachment 46203
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46203&action=edit
gcc9-pr89093.patch
Same patch, just guard the target attribute with a version check,
so that supported boot-strap configurations should work
>From gcc-bugs-return-641291-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 06:42:40 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/90175] New: ambiguous wording "critical attribute" in diagnostic
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Bug ID: 90175
Summary: ambiguous wording "critical attribute" in diagnostic
Product: gcc
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From msp430.c:
if (is_critical_func (* node))
{
warning (OPT_Wattributes,
"critical attribute has no effect on interrupt functions");
DECL_ATTRIBUTES (*node) = remove_attribute (ATTR_CRIT,
DECL_ATTRIBUTES (*
node));
}
The words "critical attribute" could either mean an attribute that is critical
for producing correct code. Or, alternatively, they could mean "the
%<critical%> attribute", which is more probable in this case.
While here, I noticed that the warning message "naked functions cannot be
reentrant" is never translated properly. This message, and the other ones must
be enclosed in N_(...).
It's unfortunate that the function attributes are often named after English
adjectives, so that constructing these ambiguous sentences is possible in the
first place.
>From gcc-bugs-return-641292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 07:09:33 2019
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Subject: [Bug translation/90176] New: diagnostics should generally contain underscore only inside quotes
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Bug ID: 90176
Summary: diagnostics should generally contain underscore only
inside quotes
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From nds32.c:
if (!TREE_PUBLIC (decl))
error ("indirect_call attribute can%'t apply for static function");
Names of attributes or pragmas are usually %<quoted%>. Since many attributes
correspond to an English adjective, this can produce ambiguous warnings like
this:
warning (OPT_Wattributes,
"critical attribute has no effect on interrupt functions");
The "critical attribute" is so difficult to decide that I think only humans can
do this, as of April 2019. The case of "indirect_call attribute" is easier to
decide though since written everyday English doesn't make use of the underscore
character.
It's debatable whether words like x86_64 need to be quoted in every case. To
find out which words need to be quoted and which words don't, the
check-internal-format-escaping.py should be extended to warn about all words
that contain an underscore and appear outside of any %<quotes%>.
To do this, it's probably time to switch the linter to using polib, so that
diagnostics that consist of multiple lines can be checked correctly, such as:
msgid ""
"%<"
"this_is_ok"
"%>"
" "
"and_this_is_not"
The check might then be:
for each occurrence of "_" in msg.msgid:
before = text before the "_"
if count("%<", before) == count("%>", before):
warn(msg, 'underscore outside of quotes')
>From gcc-bugs-return-641293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 07:11:09 2019
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--- Comment #11 from Vittorio Zecca <zeccav at gmail dot com> ---
After applying your fixes I still have overflow compiling the following
// Must be compiled with nonzero optimization
//../../gcc/gcc/poly-int.h:1095:5: runtime error: signed integer
overflow: 9223372036854775807 * 8 cannot be represented in type 'long
int'
// 87042
const char a[] = {};
int b() { '\0' == a[9223372036854775807]; }
../../gcc/gcc/poly-int.h:1095:5: runtime error: signed integer
overflow: 9223372036854775807 * 8 cannot be represented in type 'long
int'
Remember must be compiled with nonzero optimization
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Subject: [Bug target/90177] New: nds32: diagnostic says "must be enable"
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From nds32.c:
error ("Disable FPU ISA, "
"the ABI option must be enable %<-mfloat-abi=soft%>");
else
error ("%<-mabi=2fp+%> option only support when FPU available, "
"must be enable %<-mext-fpu-sp%> or %<-mext-fpu-dp%>");
As the German translator, I'm not sure what to make out of these two
diagnostics.
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/90168] context-sensitive local register allocation
Date: Fri, 19 Apr 2019 07:49:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2019-04-19
CC| |ebotcazou at gcc dot gnu.org
Summary|Unstable register |context-sensitive local
|allocation result for same |register allocation
|source code |
Ever confirmed|0 |1
Severity|normal |minor
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Supposed a function as the following, in which 'cond', 'S1' and 'S2' are
> completely irrelevant, means they do not access same variables(in term of
> RA, they own separate live range set).
>
> f1()
> {
> if (cond) {
> S1
> } else {
> S2
> }
> }
>
> Ideally, we can expect that register allocation on 'S1'is totally
> independent of 'S2', w or w/o which makes no difference.
This seems a rather far-fetched assumption, to say the least. This would
essentially imply that no global optimization is applied to the function.
> Its result should be same as below function consisting of only 'S1':
>
> f2()
> {
> S1
> }
>
> But we found gcc does not has this property. Strictly speaking, this is not
> a bug, but exposes some kind of instability in code generation, has
> undeterminable impact on some optimization, such as inlining.
And do you know of any non-toy/production compiler that has the property?
> Investigation shows this is related to integer-based frequency normalization
> (REG_FREQ_FROM_BB) used by RA, which always rounds up a small frequency
> (less than 1) to 1. In foo1(), introduction of new code makes profile counts
> of CODES be decreased, so that impact of frequency normalization error
> becomes more significant and actually distorts original proportion of
> profile counts among basic blocks in CODES. For example, in foo(), two
> blocks have counts of 3 and 100 receptively, and in foo1(), they become 0.3
> and 10, after rounding up, they are 1 and 10, thus proportion is changed
> from (3 vs 100) to (1 vs 10).
>
> Possible solution might be to adjust two scale factors used by
> REG_FREQ_FROM_BB : REG_FREQ_MAX and BB_FREQ_MAX, or to use float type to
> hold frequency?
Which version of the compiler are you using? This changed in GCC 8.
>From gcc-bugs-return-641296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 08:03:56 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #75 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It failed for me as well. And a GCC version check won't really help when using
earlier GCC 9 snapshot as system compiler (though, admittedly that isn't
supported).
Another option would be to define the attribute only #ifdef IN_RTS, because
when it is #ifdef IN_GCC_FRONTEND, it is compiled with -fno-exceptions and so
won't be really invoked.
>From gcc-bugs-return-641297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 08:12:19 2019
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Subject: [Bug rtl-optimization/90168] context-sensitive local register allocation
Date: Fri, 19 Apr 2019 08:12:00 -0000
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--- Comment #2 from Feng Xue <fxue at os dot amperecomputing.com> ---
(In reply to Eric Botcazou from comment #1)
> > Supposed a function as the following, in which 'cond', 'S1' and 'S2' are
> > completely irrelevant, means they do not access same variables(in term of
> > RA, they own separate live range set).
> >
> > f1()
> > {
> > if (cond) {
> > S1
> > } else {
> > S2
> > }
> > }
> >
> > Ideally, we can expect that register allocation on 'S1'is totally
> > independent of 'S2', w or w/o which makes no difference.
>
> This seems a rather far-fetched assumption, to say the least. This would
> essentially imply that no global optimization is applied to the function.
>
> > Its result should be same as below function consisting of only 'S1':
> >
> > f2()
> > {
> > S1
> > }
> >
> > But we found gcc does not has this property. Strictly speaking, this is not
> > a bug, but exposes some kind of instability in code generation, has
> > undeterminable impact on some optimization, such as inlining.
>
> And do you know of any non-toy/production compiler that has the property?
llvm has, and icc nearly has(only minor difference in register number, but
completely same spills).
>
> > Investigation shows this is related to integer-based frequency normalization
> > (REG_FREQ_FROM_BB) used by RA, which always rounds up a small frequency
> > (less than 1) to 1. In foo1(), introduction of new code makes profile counts
> > of CODES be decreased, so that impact of frequency normalization error
> > becomes more significant and actually distorts original proportion of
> > profile counts among basic blocks in CODES. For example, in foo(), two
> > blocks have counts of 3 and 100 receptively, and in foo1(), they become 0.3
> > and 10, after rounding up, they are 1 and 10, thus proportion is changed
> > from (3 vs 100) to (1 vs 10).
> >
> > Possible solution might be to adjust two scale factors used by
> > REG_FREQ_FROM_BB : REG_FREQ_MAX and BB_FREQ_MAX, or to use float type to
> > hold frequency?
>
> Which version of the compiler are you using? This changed in GCC 8.
GCC trunk (9.0.1 20190325)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/81598] -fsanitize=enum does not detect range violation
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Julien Blanc <julien.blanc at sprinte dot eu> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |julien.blanc at sprinte dot eu
--- Comment #9 from Julien Blanc <julien.blanc at sprinte dot eu> ---
I recently ran into this while trying to use -fsanitize=enum for the codebase.
The situation is worse for C++ enum class : since you can only assign them with
static_cast, no load check can be done (clang also fails to detect such cases).
Here’s a sample code that should trigger but does not :
#include <iostream>
enum class Foo
{
foo1 = 0,
foo2 = 1
};
std::ostream& operator<<(std::ostream& o, Foo foo)
{
switch(foo)
{
case Foo::foo1:
return o << "foo1";
case Foo::foo2:
return o << "foo2";
}
return o << "unknown";
}
int main()
{
Foo foo = static_cast<Foo>(3);
std::cout << foo << std::endl;
return 0;
}
$ g++ -fsanitize=enum -fsanitize=undefined -fno-sanitize-recover enum.cpp
$ ./a.out
unknown
$
Note that clang++ is no better :
$ clang++-7 -fsanitize=enum -fsanitize=undefined -fno-sanitize-recover=all
enum.cpp
$ ./a.out
unknown
$
But i’d expect both checkers to detect such misuse. While it could be valid
code, there’s a high chance that its a bug. Ideally an attribute could be used
if it is expected behaviour.
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Subject: [Bug c++/90108] ICE: Segmentation fault (in c_tree_chain_next)
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 19 08:24:05 2019
New Revision: 270453
URL: https://gcc.gnu.org/viewcvs?rev=270453&root=gcc&view=rev
Log:
PR c++/90108
* c-decl.c (merge_decls): If remove is main variant and
DECL_ORIGINAL_TYPE is some other type, remove a DECL_ORIGINAL_TYPE
variant that has newdecl as TYPE_NAME if any.
* decl.c (duplicate_decls): If remove is main variant and
DECL_ORIGINAL_TYPE is some other type, remove a DECL_ORIGINAL_TYPE
variant that has newdecl as TYPE_NAME if any.
* c-c++-common/pr90108.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/pr90108.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90178
Bug ID: 90178
Summary: Missed optimization: duplicated terminal basic block
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: alex.reinking at gmail dot com
Target Milestone: ---
The following short C program,
int* find_ptr(int* mem, int sz, int val) {
for (int i = 0; i < sz; i++) {
if (mem[i] == val) {
return &mem[i];
}
}
return nullptr;
}
compiles to the following on GCC (trunk) with -O3 -march=skylake on Godbolt.
find_ptr(int*, int, int):
mov rax, rdi
test esi, esi
jle .L4 ## Why not .L8?
lea ecx, [rsi-1]
lea rcx, [rdi+4+rcx*4]
jmp .L3
.L9:
add rax, 4
cmp rax, rcx
je .L8
.L3:
cmp DWORD PTR [rax], edx
jne .L9
ret
.L8:
xor eax, eax
ret
.L4:
xor eax, eax
ret
Godbolt link: https://godbolt.org/z/WczJ3J
Here the terminal basic blocks .L8 and .L4 are identical. It seems to me that
there is no benefit to keeping .L4 around, and jumps should be redirected to
.L8. Disabling AVX via -mno-avx eliminates the duplicate. However, a similar
code generation quirk exists in Clang for this program, so I apologize if there
is a microarchitectural subtlety I'm missing here.
Godbolt link for Clang comparison: https://godbolt.org/z/2uVZ8v
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Subject: [Bug rtl-optimization/90168] context-sensitive local register allocation
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|WAITING |NEW
Version|unknown |9.0
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Subject: [Bug inline-asm/67944] GCC emits unnecessary push/pop for callee-save reads.
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Alex Reinking <alex.reinking at gmail dot com> changed:
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--- Comment #4 from Alex Reinking <alex.reinking at gmail dot com> ---
Closing as invalid per Segher's comments.
>From gcc-bugs-return-641303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 09:05:25 2019
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Subject: [Bug translation/90176] diagnostics should generally contain underscore only inside quotes
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
Created attachment 46204
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46204&action=edit
linter ported to using polib
I rewrote the linter to use polib. As this is a complete rewrite, a diff would
be less readable.
I also added the check for underscores outside of %<quotes%>. It finds many
occurrences.
The ones in fortran/simplify.c are mostly internal function names, related to
internal compiler errors. In the German translation, these are left
untranslated, and only prefixed by "Interner Fehler: ".
The ones in config/arm/arm-builtins.c refer to names of builtin functions and
are really boring and error-prone to translate, as pointed out in bug 90119.
The ones in tree.c do not conform to the GCC Guidelines for Diagnostics since
they use GCC-internal words like TYPE_METHOD_BASETYPE, therefore they are left
untranslated in the German translation, and only prefixed by "Interner Fehler:
".
It's exactly this use of internal identifiers I wanted to show by filing this
bug.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #76 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46205
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gcc9-pr89093.patch
Updated patch.
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Subject: [Bug translation/90176] diagnostics should generally contain underscore only inside quotes
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Roland Illig <roland.illig at gmx dot de> changed:
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
Created attachment 46206
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linter ported to using polib
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Subject: [Bug translation/90118] Missing space between words
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--- Comment #6 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Author: clyon
Date: Fri Apr 19 09:08:49 2019
New Revision: 270454
URL: https://gcc.gnu.org/viewcvs?rev=270454&root=gcc&view=rev
Log:
PR translation/90118 Missing space between words
2019-04-19 Christophe Lyon <christophe.lyon@linaro.org>
PR translation/90118
contrib/
* check-internal-format-escaping.py: Check that %< is not next to
a word.
gcc/
* config/aarch64/aarch64.c (aarch64_override_options_internal):
Add missing space before %<.
Modified:
trunk/contrib/ChangeLog
trunk/contrib/check-internal-format-escaping.py
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64.c
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
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Nick Clifton <nickc at gcc dot gnu.org> changed:
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CC| |nickc at gcc dot gnu.org
--- Comment #13 from Nick Clifton <nickc at gcc dot gnu.org> ---
FYI - I have now checked in a patch to the RX assembler which fixes this
problem.
Martin - I will leave it to you to verify that the build now works (since I am
lazy, and it is the start of a long weekend) but if there are problems please
let me know.
Cheers
Nick
>From gcc-bugs-return-641309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 09:59:11 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90119] Merge translation msgids that only differ in placeholders
Date: Fri, 19 Apr 2019 09:59:00 -0000
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--- Comment #4 from Roland Illig <roland.illig at gmx dot de> ---
Created attachment 46207
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46207&action=edit
linter that checks diagnostics that only differ in placeholder content
Using polib, writing the linter was not trivial, but still easy.
When you consider to commit this, please coordinate with bug 90176 since I have
submitted an older version of the linter there, too.
Since the linter gets more and more features, it may be the right time to
rename it to something more generic.
>From gcc-bugs-return-641310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 10:01:20 2019
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Subject: [Bug testsuite/82920] cet test failures on darwin
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--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 46208
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Patch for codegen and testsuite
This is not just a testsuite issue, there are multiple places where incorrect
code is generated because the output mechanism doesn't use
__USER_LABEL_PREFIX__.
Thus this is breaking ABI on Darwin - the fact that there's a relatively small
number of test fails is only because most of the tests are compile-only and
just test what is generated (so there is nothing catching the wrong code except
a single test that does link).
Once the output is corrected there are a lot of fails and thus the test-suite
part of the patch is large, if mostly mechanical.
Darwin folks, please test this - I have limited test resources for the next
couple of weeks.
>From gcc-bugs-return-641311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 10:04:04 2019
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ABI, wrong-code
--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> ---
This will need a similar patch for 8.x
Note that the target-supports test for set should include the "-fcf-protection"
flag as noted in comment #3. That is not included in the patch above.
>From gcc-bugs-return-641312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 10:36:20 2019
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Subject: [Bug translation/90148] Closing quote in wrong position in plugin.c
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--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
From rs6000/linux64.h:
error ("%<-mcmodel incompatible with other toc options%>"); \
The closing quote should be directly behind the "-mcmodel".
>From gcc-bugs-return-641313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 10:39:08 2019
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Subject: [Bug translation/90179] New: typo in diagnostic for unrecognized control register
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Bug ID: 90179
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From rx.c:
warning (0, "unrecognized control register number: %d"
"- using %<psw%>", (int) INTVAL (op));
Between the %d and the hyphen should be a space.
>From gcc-bugs-return-641314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 10:41:30 2019
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Subject: [Bug translation/90148] Closing quote in wrong position in plugin.c
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--- Comment #4 from Roland Illig <roland.illig at gmx dot de> ---
From rx.c:
error ("use %<__builtin_rx_mvtc%> (0, ... ) to write arbitrary values to
PSW");
The closing quote should be after the closing parenthesis.
>From gcc-bugs-return-641315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 10:46:14 2019
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Subject: [Bug translation/90180] New: ambiguous diagnostic for "out of range"
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Bug ID: 90180
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From s390.c:
error ("constant argument %d for builtin %qF is out of range "
"(0..%wu)", argnum, decl,
(HOST_WIDE_INT_1U << bitwidth) - 1);
In other places, the round parentheses are used to exclude one edge of the
interval, like in [0..size). In the German translation I have therefore omitted
the parentheses:
... liegt außerhalb des Bereichs 0..%wu
>From gcc-bugs-return-641316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 10:47:49 2019
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Subject: [Bug translation/90180] ambiguous diagnostic for "out of range"
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--- Comment #1 from Roland Illig <roland.illig at gmx dot de> ---
While here, the two diagnostics in s390_const_operand_ok are very similar. It
would be nice if the first of them had the same text as the second one, passing
the 0 as an argument.
>From gcc-bugs-return-641317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 11:06:54 2019
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From: "nfxjfg at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug inline-asm/90181] New: Feature request: provide a way to explicitly select specific named registers in constraints
Date: Fri, 19 Apr 2019 11:06:00 -0000
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Currently, inline assembler constraints have no way to select an explicitly
named register. Apparently you're supposed to use register variables. There is
even text that register variables exist only for this use case.
For example, suppose you want to pass something through the register a7 on the
RISC-V platform. You need to do:
void call_ecall(size_t num)
{
register size_t r_a7 __asm("a7") = num;
__asm volatile("ecall" : : "r" (r_a7) : "memory");
}
This gets awkward fast. It adds a lot of extra noise if you have many registers
to pass (the ecall instruction provides an example where this may be needed).
The semantics are also not entirely clear: will r_a7 occupy the a7 register for
the entire function (suppose there is more C code around it)? What if
call_ecall gets inlined into a larger function? I think the intended (and
actual) semantics are that it's effective only at the points where it's passed
with register inline asm constraints.
Why can't this just be:
void call_ecall(size_t num)
{
__asm volatile("ecall" : : "a7" (num) : "memory");
}
Some architectures do support this (like x86), but not all.
If this is not possible, I'd be nice if the gcc developers could establish why
not, and in particular why a new architecture/backend like RISC-V does not.
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90164] wrong tense in ABI change diagnostic
Date: Fri, 19 Apr 2019 11:41:00 -0000
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Martin Sebor from comment #1)
> Confirmed. There seems to be little consistency between "changes" and "has
> changed" -- it's 11 vs 6.
To me it looks completely consistent.
If something changed in the GCC history, it's "changed".
If something is changing in the current GCC major version (which GCC 8 was last
year), it's "changes". It's just that whoever wrote that code didn't remember
to update the word to "changed" after the release.
The other diagnostics refer to options that the GCC user can actively influence
at any time, therefore "changes" is appropriate.
In summary, it's really only this one "GCC 8 changed" that is inconsistent.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/89888] [7/8/9 Regression] When switch controlling expression is promoted from type narrower than int, GCC does not diagnose identical cases
Date: Fri, 19 Apr 2019 11:56:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 19 11:56:07 2019
New Revision: 270455
URL: https://gcc.gnu.org/viewcvs?rev=270455&root=gcc&view=rev
Log:
PR c/89888
* c-common.h (c_add_case_label): Remove orig_type and outside_range_p
arguments.
(c_do_switch_warnings): Remove outside_range_p argument.
* c-common.c (check_case_bounds): Removed.
(c_add_case_label): Remove orig_type and outside_range_p arguments.
Don't call check_case_bounds. Fold low_value as well as high_value.
* c-warn.c (c_do_switch_warnings): Remove outside_range_p argument.
Check for case labels outside of range of original type here and
adjust them.
c/
* c-typeck.c (struct c_switch): Remove outside_range_p member.
(c_start_case): Don't clear it.
(do_case): Adjust c_add_case_label caller.
(c_finish_case): Adjust c_do_switch_warnings caller.
cp/
* decl.c (struct cp_switch): Remove outside_range_p member.
(push_switch): Don't clear it.
(pop_switch): Adjust c_do_switch_warnings caller.
(finish_case_label): Adjust c_add_case_label caller.
testsuite/
* c-c++-common/pr89888.c: New test.
* g++.dg/torture/pr40335.C: Change dg-bogus into dg-warning.
Don't expect -Wswitch-unreachable warning.
Added:
trunk/gcc/testsuite/c-c++-common/pr89888.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c-family/c-warn.c
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-typeck.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/torture/pr40335.C
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Subject: [Bug c++/90138] [7/8/9 Regression] ICE on invalid in contains_struct_check()
Date: Fri, 19 Apr 2019 11:57:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 19 11:57:23 2019
New Revision: 270456
URL: https://gcc.gnu.org/viewcvs?rev=270456&root=gcc&view=rev
Log:
PR c++/90138
* pt.c (process_template_parm): Set decl to pushdecl result. If
!is_non_type, also set parm to that.
* g++.dg/template/pr90138.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/template/pr90138.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/90139] [9 Regression] ICE in emit_block_move_hints, at expr.c:1601
Date: Fri, 19 Apr 2019 11:58:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 19 11:58:11 2019
New Revision: 270457
URL: https://gcc.gnu.org/viewcvs?rev=270457&root=gcc&view=rev
Log:
PR middle-end/90139
* tree-outof-ssa.c (get_temp_reg): If reg_mode is BLKmode, return
assign_temp instead of gen_reg_rtx.
* gcc.c-torture/compile/pr90139.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr90139.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-outof-ssa.c
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Subject: [Bug c++/90108] ICE: Segmentation fault (in c_tree_chain_next)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Known to fail|9.0 |
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk.
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Subject: [Bug c/89888] [7/8 Regression] When switch controlling expression is promoted from type narrower than int, GCC does not diagnose identical cases
Date: Fri, 19 Apr 2019 12:07:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] When |[7/8 Regression] When
|switch controlling |switch controlling
|expression is promoted from |expression is promoted from
|type narrower than int, GCC |type narrower than int, GCC
|does not diagnose identical |does not diagnose identical
|cases |cases
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.1 (so far).
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Subject: [Bug middle-end/90139] [9 Regression] ICE in emit_block_move_hints, at expr.c:1601
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/90138] [7/8 Regression] ICE on invalid in contains_struct_check()
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |9.0
Resolution|--- |FIXED
Summary|[7/8/9 Regression] ICE on |[7/8 Regression] ICE on
|invalid in |invalid in
|contains_struct_check() |contains_struct_check()
Known to fail| |7.4.0, 8.3.0
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.1+ so far.
error-recovery, so not backporting it to release branches.
>From gcc-bugs-return-641326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 12:34:02 2019
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/90181] Feature request: provide a way to explicitly select specific named registers in constraints
Date: Fri, 19 Apr 2019 12:34:00 -0000
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
x86 doesn't support this either. It just happens to have a few register
classes that consist of a single register, but only because of ISA constraints.
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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/60591] Report enum conversions as part of Wconversion
Date: Fri, 19 Apr 2019 12:55:00 -0000
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Jonny Grant <jg at jguk dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jg at jguk dot org
--- Comment #3 from Jonny Grant <jg at jguk dot org> ---
Clang++ gives a signedness conversion warning that g++ doesn't for C++ code.
#1 with x86-64 clang (trunk)
<source>:4:22: warning: implicit conversion changes signedness: 'things' to
'unsigned int' [-Wsign-conversion]
unsigned int i = thing;
~ ^~~~~
1 warning generated.
Compiler returned: 0
enum things { thing=-1 }; //< declaration of a constant of type int
int main()
{
unsigned int i = thing;
return (int)i;
}
>From gcc-bugs-return-641328-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 13:00:23 2019
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Subject: [Bug c/60591] Report enum conversions as part of Wconversion
Date: Fri, 19 Apr 2019 13:00:00 -0000
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--- Comment #4 from Jonny Grant <jg at jguk dot org> ---
Clang++ gives a nice error, can gcc improve to also make it clear it is an
enum?
-Wall -Wconversion -Wextra
1
<Compilation failed>
<Compilation failed>
Find
x86-64 clang (trunk) - 349ms
#1 with x86-64 clang (trunk)
<source>:8:9: error: assigning to 'enum hello' from incompatible type 'enum
things'
h = a;
^
1 error generated.
Compiler returned: 1
#1 with x86-64 gcc (trunk)
<source>: In function 'int main()':
<source>:8:9: error: cannot convert 'things' to 'hello' in assignment
8 | h = a;
| ^
| |
| things
Compiler returned: 1
enum things { thing=-1 };
enum hello {t};
int main()
{
enum things a;
a= thing;
enum hello h;
h = a;
return (int)a;
}
>From gcc-bugs-return-641329-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 13:15:32 2019
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From: "daniel.santos at pobox dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90163] untranslated placeholder in warn_once_call_ms2sysv_xlogues
Date: Fri, 19 Apr 2019 13:15:00 -0000
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--- Comment #2 from Daniel Santos <daniel.santos at pobox dot com> ---
Yes, this is mine. Does this only become untranslatable when feature is
"static call chains"?
iiuc, static call chains are only used with nested functions (a GNU C
extension) and closure functions -- is this correct? So using the descriptor
"static call chains" is probably bad in the first place. We might be able to
just change this to "nested functions".
But given that, what would be the ideal way to present this?
This is one of those things that *could* be implemented but was initially
deemed to be more work than it would be worth. It would be better to disable
-mcall-ms2sysv-xloguesthe for the affected functions, but this is pretty much
for Wine and, to my knowledge, we haven't encountered this error in the wild.
>From gcc-bugs-return-641330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 13:24:37 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90182] New: missing space in multiline string literal
Date: Fri, 19 Apr 2019 13:24:00 -0000
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Bug ID: 90182
Summary: missing space in multiline string literal
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Fixing this issue for good is being done in bug 79618. That is more complicated
than "trivial".
In this bug I collect the trivial occurrences that should be fixed
individually, until the general solution is ready.
From cp/decl.c:
error ("too many braces around scalar initializer"
"for type %qT", type);
>From gcc-bugs-return-641331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 13:40:01 2019
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Subject: [Bug translation/90183] New: ambiguous diagnostics "only available with"
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Bug ID: 90183
Summary: ambiguous diagnostics "only available with"
Product: gcc
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For example:
pedwarn (cp_lexer_peek_token (parser->lexer)->location,
OPT_Wpedantic, "nested inline namespace definitions only "
"available with %<-std=c++2a%> or %<-std=gnu++2a%>");
Should this be really "only available with", or shouldn't it better be "only
available since" or "only available starting with"?
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90184] New: confusing diagnostic "attribute using prefix"
Date: Fri, 19 Apr 2019 14:35:00 -0000
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Bug ID: 90184
Summary: confusing diagnostic "attribute using prefix"
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From cp/parser.c:
pedwarn (input_location, 0,
"attribute using prefix only available "
"with %<-std=c++17%> or %<-std=gnu++17%>");
The words "attribute using prefix" can be interpreted by humans in really many
different ways:
- "attribute" can be a noun or an adjective
- "using" can be a verb or the C++ keyword
Is this about an "attribute that is using a prefix"?
Is this about a "prefix to an attribute called "using""?
Is this about a prefix called "attribute using"?
Since the comment above this diagnostic mentions that "attribute-using-prefix"
is a fixed term in the C++ grammar, the diagnostic should use hyphens instead
of spaces.
>From gcc-bugs-return-641333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 14:40:49 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90185] New: diagnostic "argument pack of characters" sounds like a complaint
Date: Fri, 19 Apr 2019 14:40:00 -0000
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Bug ID: 90185
Summary: diagnostic "argument pack of characters" sounds like a
complaint
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From cp/parser.c:
/* http://cplusplus.github.io/EWG/ewg-active.html#66 */
pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wpedantic,
"ISO C++ did not adopt string literal operator templa"
"tes taking an argument pack of characters");
First, the words "templa" and "tes" should not be split.
Second, this diagnostic doesn't conform to the GCC Guidelines for Diagnostics,
which say that diagnostics should be helpful and lead the reader into the right
direction.
The part "ISO C++ did not accept" is not helpful at all. So what? When? What
were the circumstances? What would have happened if they had adopted them?
And what does this all mean for me? How do I fix my code when I get this
warning? That's the essential question that the diagnostic should answer.
>From gcc-bugs-return-641334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 15:19:03 2019
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Subject: [Bug translation/90118] Missing space between words
Date: Fri, 19 Apr 2019 15:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90118
--- Comment #7 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Roland Illig from comment #5)
> It would be good if the check-internal-format-escaping.py linter would
> actually output what is wrong in the msgid. The number of checks will
> increase as I'm trying to translate the rest of GCC 9, therefore it will
> become more difficult to guess what is wrong with a translation. Ideally
> this linter should follow the GCC guidelines for diagnostics, which are
> described in
> https://gcc.gnu.org/onlinedocs/gccint/Guidelines-for-Diagnostics.html.
Do you mean something like that?
diff --git a/contrib/check-internal-format-escaping.py
b/contrib/check-internal-format-escaping.py
index 9c62586..802dff2 100755
--- a/contrib/check-internal-format-escaping.py
+++ b/contrib/check-internal-format-escaping.py
@@ -53,15 +53,19 @@ for i, l in enumerate(lines):
for p in parts:
if p.startswith('-'):
if len(p) >= 2 and (p[1].isalpha() and p != '-INF'):
- print('%s: %s' % (origin, text))
+ reason = 'Illegal string after "-"'
+ print('%s: %s: %s' % (origin, reason, text))
elif p.startswith('__builtin_'):
- print('%s: %s' % (origin, text))
+ reason = 'Starts with _builtin_'
+ print('%s: %s: %s' % (origin, reason, text))
if re.search("[^%]'", p):
- print('%s: %s' % (origin, text))
+ reason = 'Illegal single quote'
+ print('%s: %s: %s' % (origin, reason, text))
# %< should not be preceded by a non-punctuation
# %character.
if re.search("[a-zA-Z0-9]%<", p):
- print('%s: %s' % (origin, text))
+ reason = 'Illegal character before %<'
+ print('%s: %s: %s' % (origin, reason, text))
j += 1
origin = None
>From gcc-bugs-return-641335-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 15:36:56 2019
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
Date: Fri, 19 Apr 2019 15:36:00 -0000
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--- Comment #8 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Fri Apr 19 15:36:20 2019
New Revision: 270459
URL: https://gcc.gnu.org/viewcvs?rev=270459&root=gcc&view=rev
Log:
/cp
2019-04-19 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/89900
* pt.c (fn_type_unification): When handling null explicit
arguments do not special case non-parameter packs.
/testsuite
2019-04-19 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/89900
* g++.dg/cpp0x/pr89900-1.C: New.
* g++.dg/cpp0x/pr89900-2.C: Likewise.
* g++.dg/cpp0x/pr89900-3.C: Likewise.
* g++.dg/cpp0x/pr89900-4.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/pr89900-1.C
trunk/gcc/testsuite/g++.dg/cpp0x/pr89900-2.C
trunk/gcc/testsuite/g++.dg/cpp0x/pr89900-3.C
trunk/gcc/testsuite/g++.dg/cpp0x/pr89900-4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-641336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 15:43:08 2019
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From: "austin.card at torchtechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90186] New: optimizing options -O1 and -O2 produce different results
Date: Fri, 19 Apr 2019 15:43:00 -0000
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Bug ID: 90186
Summary: optimizing options -O1 and -O2 produce different
results
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: austin.card at torchtechnologies dot com
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Created attachment 46209
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46209&action=edit
source code and input .txt file
CentOS 7:
g++ -std=c++11 -O1 -o CheckSum main.cpp CheckSum.cpp -I/usr/local/include
./CheckSum
prints a different checksum result than
g++ -std=c++11 -O2 -o CheckSum main.cpp CheckSum.cpp -I/usr/local/include
./CheckSum
If you uncomment line 144 of Udp.h, then both builds output the same result.
Attached is the source code and an input .txt file.
>From gcc-bugs-return-641337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 15:43:56 2019
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Fri, 19 Apr 2019 15:43:00 -0000
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--- Comment #12 from Vittorio Zecca <zeccav at gmail dot com> ---
Here are two more test cases with undefined behaviour in poly-int.h
Must be compiled with nonzero optimization
cat gccerr73.c
// must be compiled with nonzero optimization
// ../../gcc/gcc/poly-int.h:753:21: runtime error: signed integer
overflow: -5621332293356458048 * 8 cannot be represented in type 'long
int'
int a[4];
void f()
{
long int b = 7818038963515661296;
a[0xA699ECD2C348A3A0] = a[b];
}
[vitti cc]$cat gccerr74.c
// Must be compiled with nonzero optimization
// ../../gcc/gcc/poly-int.h:944:5: runtime error: signed integer
overflow: 162675373468811328 - -9060696663385964544 cannot be
represented in type 'long int'
long b[1][9];
typedef long V __attribute__((vector_size (16), may_alias));
void
foo ()
{
V *c = (V *) ((char *) b + -9060696663385964544);
*c = (V) { 1, 1 };
long __attribute__((may_alias)) *d = (long *) ((char *) b +
162675373468811328);
*d = 1;
}
>From gcc-bugs-return-641338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 15:57:50 2019
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Subject: [Bug c++/89923] printf format check and char8_t
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--- Comment #6 from Tom Honermann <tom at honermann dot net> ---
(In reply to joseph@codesourcery.com from comment #5)
> We (GCC) don't control printf;
I know, by "we" I meant the C and C++ standards community.
> the format checking should match what the
> actual libc supports.
Agreed.
>From gcc-bugs-return-641339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 16:12:23 2019
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Subject: [Bug testsuite/81058] FAIL: gcc.target/i386/avx512bw-vpmovu?swb-1.c scan-assembler-times vpmovu?swb.*
Date: Fri, 19 Apr 2019 16:12:00 -0000
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--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 46210
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46210&action=edit
Patch for testing
Darwin doesn't support non-pic for user-space programs, so these tests fail
(and the codeine is sufficiently different that it would be better to write a
second set of tests if that is seen as useful). {aside, why is there no PIC
test for Linux, I guess?]
There is "dynamic-no-pic" for m32 but it doesn't seem worth jumping through
hoops to make a test case for that, since it's not realistically going to be
used on a machine supporting AVX512.
>From gcc-bugs-return-641340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 16:18:05 2019
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Subject: [Bug translation/90164] wrong tense in ABI change diagnostic
Date: Fri, 19 Apr 2019 16:18:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Agreed.
>From gcc-bugs-return-641341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 16:28:23 2019
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Subject: [Bug translation/90180] ambiguous diagnostic for "out of range"
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-19
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Most middle-end diagnostics format ranges using the [min, max] notation (and
less commonly [min, max + 1) for half open intervals). If I'm reading the
s390.c code correctly, here (0..%wu) would be rendered as the closed interval
[0, %wu] by the middle-end. We should adopt the same convention throughout.
Thus confirmed.
>From gcc-bugs-return-641342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 16:33:10 2019
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From: "ianbriggsutah at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90187] New: ICE in extract_insn, at recog.c:2304 x86_64
Date: Fri, 19 Apr 2019 16:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90187
Bug ID: 90187
Summary: ICE in extract_insn, at recog.c:2304 x86_64
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ianbriggsutah at gmail dot com
Target Milestone: ---
Created attachment 46211
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46211&action=edit
Creduced file which triggers the ICE
the exact version of GCC:
gcc version 8.2.0 (Ubuntu 8.2.0-1ubuntu2~18.04)
the system type:
x86_64-linux-gnu
the options given when GCC was configured/built:
../src/configure -v --with-pkgversion='Ubuntu 8.2.0-1ubuntu2~18.04'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
the complete command line that triggers the bug:
g++-8 -Ofast -ffloat-store -c test.c
the compiler output:
test.cpp: In member function ‘int* e::g()’:
test.cpp:30:1: error: unrecognizable insn:
}
^
(insn 38 37 39 6 (set (reg:V2DF 120)
(smin:V2DF (mem/c:V2DF (plus:DI (reg/f:DI 82 virtual-stack-vars)
(const_int -64 [0xffffffffffffffc0])) [3 vect__5.6+0 S16
A128])
(mem/c:V2DF (plus:DI (reg/f:DI 82 virtual-stack-vars)
(const_int -48 [0xffffffffffffffd0])) [3 vect__6.9+0 S16
A128]))) -1
(nil))
during RTL pass: vregs
test.cpp:30:1: internal compiler error: in extract_insn, at recog.c:2304
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
>From gcc-bugs-return-641343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 16:53:28 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90178] Missed optimization: duplicated terminal basic block with -mavx
Date: Fri, 19 Apr 2019 16:53:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Missed optimization: |Missed optimization:
|duplicated terminal basic |duplicated terminal basic
|block |block with -mavx
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This is triggered by -mavx:
[hjl@gnu-cfl-1 pr90178]$ cat x.i
int* find_ptr(int* mem, int sz, int val) {
for (int i = 0; i < sz; i++) {
if (mem[i] == val) {
return &mem[i];
}
}
return 0;
}
[hjl@gnu-cfl-1 pr90178]$ make
/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/ -O2 -mavx
-S x.i
[hjl@gnu-cfl-1 pr90178]$ cat x.s
.file "x.i"
.text
.p2align 4
.globl find_ptr
.type find_ptr, @function
find_ptr:
.LFB0:
.cfi_startproc
movq %rdi, %rax
testl %esi, %esi
jle .L4
leal -1(%rsi), %ecx
leaq 4(%rdi,%rcx,4), %rcx
jmp .L3
.p2align 4,,10
.p2align 3
.L9:
addq $4, %rax
cmpq %rcx, %rax
je .L8
.L3:
cmpl %edx, (%rax)
jne .L9
ret
.p2align 4,,10
.p2align 3
.L8:
xorl %eax, %eax
ret
.L4:
xorl %eax, %eax
ret
.cfi_endproc
.LFE0:
.size find_ptr, .-find_ptr
.ident "GCC: (GNU) 9.0.1 20190418 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 pr90178]$
/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-wip-debug/build-x86_64-linux/gcc/ -O2 -S
x.i
[hjl@gnu-cfl-1 pr90178]$ cat x.s
.file "x.i"
.text
.p2align 4
.globl find_ptr
.type find_ptr, @function
find_ptr:
.LFB0:
.cfi_startproc
movq %rdi, %rax
testl %esi, %esi
jle .L4
leal -1(%rsi), %ecx
leaq 4(%rdi,%rcx,4), %rcx
jmp .L3
.p2align 4,,10
.p2align 3
.L7:
addq $4, %rax
cmpq %rcx, %rax
je .L4
.L3:
cmpl %edx, (%rax)
jne .L7
ret
.p2align 4,,10
.p2align 3
.L4:
xorl %eax, %eax
ret
.cfi_endproc
.LFE0:
.size find_ptr, .-find_ptr
.ident "GCC: (GNU) 9.0.1 20190418 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 pr90178]$
>From gcc-bugs-return-641344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 16:58:38 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/88055] [9 regression] ICE in extract_insn, at recog.c:2305 on ppc64le
Date: Fri, 19 Apr 2019 16:58:00 -0000
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--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Fri Apr 19 16:58:01 2019
New Revision: 270460
URL: https://gcc.gnu.org/viewcvs?rev=270460&root=gcc&view=rev
Log:
tree-call-cdce: If !HONOR_NANS do not make code with NaNs (PR88055)
If we don't HONOR_NANS we should not try to use any unordered
comparison results. Best case those will just be optimized away;
realistically, they ICE. For example, the rs6000 backend has some
code that specifically checks we never do this.
PR tree-optimization/88055
* tree-call-cdce.c (comparison_code_if_no_nans): New function.
(gen_one_condition): Use it if !HONOR_NANS.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-call-cdce.c
>From gcc-bugs-return-641345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 17:12:36 2019
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Subject: [Bug tree-optimization/88055] [9 regression] ICE in extract_insn, at recog.c:2305 on ppc64le
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-641346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 17:15:37 2019
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From: "pthaugen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/84369] test case gcc.dg/sms-10.c fails on power9
Date: Fri, 19 Apr 2019 17:15:00 -0000
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--- Comment #7 from pthaugen at gcc dot gnu.org ---
Author: pthaugen
Date: Fri Apr 19 17:14:57 2019
New Revision: 270461
URL: https://gcc.gnu.org/viewcvs?rev=270461&root=gcc&view=rev
Log:
Backport from mainline:
2019-04-16 Pat Haugen <pthaugen@us.ibm.com>
PR target/84369
* config/rs6000/power9.md: Add store forwarding bypass.
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/rs6000/power9.md
>From gcc-bugs-return-641347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 17:35:29 2019
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Subject: [Bug translation/90118] Missing space between words
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--- Comment #8 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Christophe Lyon from comment #7)
> Do you mean something like that?
>
> if p.startswith('-'):
> if len(p) >= 2 and (p[1].isalpha() and p != '-INF'):
> - print('%s: %s' % (origin, text))
> + reason = 'Illegal string after "-"'
> + print('%s: %s: %s' % (origin, reason, text))
Almost. The guidelines recommend to say _why_ something is wrong. It could also
be more specific by additionally providing the information that this diagnostic
is meant to match command line arguments.
In my current local version of the linter, the code is:
if part.startswith('-'):
if len(part) >= 2 and part[1].isalpha() and part != '-INF':
warn(msg, 'command line option outside %<quotes%>')
> elif p.startswith('__builtin_'):
> - print('%s: %s' % (origin, text))
> + reason = 'Starts with _builtin_'
> + print('%s: %s: %s' % (origin, reason, text))
And why is that bad? I chose the following diagnostic:
elif part.startswith('__builtin_'):
warn(msg, 'builtin function outside %<quotes%>')
> if re.search("[^%]'", p):
> - print('%s: %s' % (origin, text))
> + reason = 'Illegal single quote'
> + print('%s: %s: %s' % (origin, reason, text))
if re.search("[^%]'", msgid):
warn(msg, 'apostrophe without leading %')
> # %< should not be preceded by a non-punctuation
> # %character.
> if re.search("[a-zA-Z0-9]%<", p):
> - print('%s: %s' % (origin, text))
> + reason = 'Illegal character before %<'
> + print('%s: %s: %s' % (origin, reason, text))
# from bug 90118: Missing space between words
if re.search("[a-zA-Z0-9]%<", msgid):
warn(msg, '%< directly following a letter or digit')
See bug 90119 and bug 90176 for my versions of the linter from today's
afternoon. I've added some more changes since then.
Of course it would be even nicer if the linter would also offer an explanation,
like I did in https://github.com/rillig/pkglint, or like the MIPSPro compiler
has with its separate explain(1) utility. That could be the next step.
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Subject: [Bug c++/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
Date: Fri, 19 Apr 2019 17:46:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-19
Summary|Missed optimization: |[9 Regression] Missed
|duplicated terminal basic |optimization: duplicated
|block with -mavx |terminal basic block with
| |-mavx
Ever confirmed|0 |1
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Subject: [Bug c++/90171] [9 Regression] ICE in build_op_delete_call, at cp/call.c:6630
Date: Fri, 19 Apr 2019 17:50:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-641350-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:02:16 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90188] New: ambiguous diagnostic "may not"
Date: Fri, 19 Apr 2019 18:02:00 -0000
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Bug ID: 90188
Summary: ambiguous diagnostic "may not"
Product: gcc
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From cp/parser.c:
parser->type_definition_forbidden_message
= G_("types may not be defined in iterator type");
The term "may not" is ambiguous. It can either mean:
it could be that types are not defined in iterator type
or:
types should/must not be defined in iterator type
In this case I guess it's the latter. The diagnostic should be worded more
clearly. There's a reason that RFC 2119 does not include "may not" in its list
of keywords.
>From gcc-bugs-return-641351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:15:48 2019
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Subject: [Bug translation/90183] ambiguous diagnostics "only available with"
Date: Fri, 19 Apr 2019 18:15:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Currently there's nothing later than c++2a so it's correct. To be future proof
it could say "or later" but that's a bit misleading, as there is (currently)
nothing later.
>From gcc-bugs-return-641352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:16:49 2019
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Subject: [Bug inline-asm/90181] Feature request: provide a way to explicitly select specific named registers in constraints
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think the manual is clear (when it comes to the following questions:
will r_a7 occupy the a7 register for the entire function (suppose there is more
C code around it)? What if call_ecall gets inlined into a larger function?
)
https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html#Local-Register-Variables
Warning: In the above example, be aware that a register (for example r0) can be
call-clobbered by subsequent code, including function calls and library calls
for arithmetic operators on other variables (for example the initialization of
p2).
>From gcc-bugs-return-641353-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:21:43 2019
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Subject: [Bug c++/90184] confusing diagnostic "attribute using prefix"
Date: Fri, 19 Apr 2019 18:21:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
But is it confusing in context when the diagnostic points to a piece of code
saying [[using gnu: noinline]] ?
>From gcc-bugs-return-641354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:26:34 2019
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Subject: [Bug c++/90185] diagnostic "argument pack of characters" sounds like a complaint
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Agreed. I think "ISO C++ does not support..." is how we usually say this.
It's a -pedantic warning, so that already tells users that this is warning
about a feature GCC supports as an extension.
>From gcc-bugs-return-641355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:30:45 2019
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Subject: [Bug c++/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
Host| |ubizjak at gmail dot com
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Add -mno-vzeroupper fixes it.
>From gcc-bugs-return-641356-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:44:28 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90148] Closing quote in wrong position in plugin.c
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--- Comment #5 from Roland Illig <roland.illig at gmx dot de> ---
From fortran/intrinsic.c:
gfc_warning_now (OPT_Wintrinsics_std, "The intrinsic %qs at %L is not "
"included in the selected standard but %s and %qs
will"
" be treated as if declared EXTERNAL. Use an"
" appropriate %<-std=%>* option or define"
" %<-fall-intrinsics%> to allow this intrinsic.",
sym->name, &loc, symstd, sym->name);
After the "-std=".
>From gcc-bugs-return-641357-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 18:54:47 2019
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Subject: [Bug c++/90189] New: Spurious "error: parameter packs not expanded" when a dependent name coincides
Date: Fri, 19 Apr 2019 18:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90189
Bug ID: 90189
Summary: Spurious "error: parameter packs not expanded" when a
dependent name coincides
Product: gcc
Version: 9.0
URL: https://godbolt.org/z/UuwYK4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lkoppel at uwaterloo dot ca
Target Milestone: ---
Source:
struct A {
using CommonName = char;
};
template <typename T, typename... CommonName>
struct B {
using V = typename T::CommonName;
};
template struct B<A>;
Output:
<source>:7:37: error: parameter packs not expanded with '...':
7 | using V = typename T::CommonName;
| ^
<source>:7:37: note: 'CommonName'
Compiler returned: 1
Rejected by all GCC versions. Accepted by clang, msvc.
>From gcc-bugs-return-641358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 19:07:03 2019
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Subject: [Bug c++/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
Date: Fri, 19 Apr 2019 19:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90178
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r266358.
>From gcc-bugs-return-641359-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 19:15:34 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90184] confusing diagnostic "attribute using prefix"
Date: Fri, 19 Apr 2019 19:15:00 -0000
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Jonathan Wakely from comment #1)
> But is it confusing in context when the diagnostic points to a piece of code
> saying [[using gnu: noinline]] ?
Yes, it is. I just had a look at gen-attrs-66.C, and even when seeing the
corresponding source code, I am still confused by the highly ambiguous grammar.
My try for a better wording:
the %<using%> prefix for attributes is only available ...
This follows the GCC Guidelines for Diagnostics more closely, which say that
diagnostics should be complete sentences.
>From gcc-bugs-return-641360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 19:16:56 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90183] ambiguous diagnostics "only available with"
Date: Fri, 19 Apr 2019 19:16:00 -0000
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
The same diagnostic also appears for %<-std=c++-17%> and several others, and
these are in the past. Are the options from these standard only available in
that particular version of the standard? I don't guess so.
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/90163] untranslated placeholder in warn_once_call_ms2sysv_xlogues
Date: Fri, 19 Apr 2019 19:27:00 -0000
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--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Daniel Santos from comment #2)
> Yes, this is mine. Does this only become untranslatable when feature is
> "static call chains"?
In German, this might result in:
%<-mcall-ms2sysv-xlogues%> ist nicht mit static call chains kompatibel
This would be a change of language in the middle of the sentence without any
indication. Therefore yes, I consider it impossible to translate.
> But given that, what would be the ideal way to present this?
Two variants of the warning:
static void warn_once_call_ms2sysv_xlogues (const char *feature, bool q)
{
static bool warned_once = false;
if (warned_once)
return;
warned_once = true;
if (q)
{
/* TRANSLATORS: %qs is either a command line option or the name of a
* built-in function. */
warning (0, "%<-mcall-ms2sysv-xlogues%> is not compatible with %qs",
feature);
}
else
{
warning (0, "%<-mcall-ms2sysv-xlogues%> is not compatible with "
"nested functions");
}
}
Either way, it's strange that the "feature" parameter is not used at all in the
!q case. That's only complicated because of the warned_once variable. If it
were possible to extract the warned_once variable out of this function, the
variant for nested functions could be called directly.
>From gcc-bugs-return-641362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 19:33:07 2019
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Subject: [Bug c++/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
Date: Fri, 19 Apr 2019 19:33:00 -0000
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
The removed insn is insn 35 in:
;; basic block 8, loop depth 0, count 114863532 (estimated locally), maybe hot
;; prev block 7, next block 1, flags: (REACHABLE, HOT_PARTITION, RTL)
;; pred: 7 [always] count:6317494 (estimated locally) (FALLTHRU)
;; 4 [5.5% (guessed)] count:55807731 (estimated locally)
(LOOP_EXIT)
;; 6 [always] count:52738306 (estimated locally)
;; bb 8 artificial_defs: { }
;; bb 8 artificial_uses: { u44(6){ }u45(7){ }u46(16){ }u47(19){ }}
;; lr in 6 [bp] 7 [sp] 16 [argp] 19 [frame] 90
;; lr use 6 [bp] 7 [sp] 16 [argp] 19 [frame] 90
;; lr def 0 [ax]
(code_label 34 6 37 8 1 (nil) [2 uses])
(note 37 34 35 8 [bb 8] NOTE_INSN_BASIC_BLOCK)
(insn 35 37 36 8 (set (reg/i:DI 0 ax)
(reg/f:DI 90 [ <retval> ])) "x.i":8:1 66 {*movdi_internal}
(expr_list:REG_DEAD (reg/f:DI 90 [ <retval> ])
(nil)))
(insn 36 35 0 8 (use (reg/i:DI 0 ax)) "x.i":8:1 -1
(nil))
;; succ: EXIT [always] count:114863532 (estimated locally) (FALLTHRU)
;; lr out 0 [ax] 6 [bp] 7 [sp] 16 [argp] 19 [frame]
With -mvzeroupper, it becomes:
;; basic block 8, loop depth 0, count 114863532 (estimated locally), maybe hot
;; prev block 7, next block 1, flags: (HOT_PARTITION, RTL)
;; pred: 7 [always] count:6317494 (estimated locally) (FALLTHRU)
;; 4 [5.5% (guessed)] count:55807731 (estimated locally)
(LOOP_EXIT)
;; 6 [always] count:52738306 (estimated locally)
;; bb 8 artificial_defs: { }
;; bb 8 artificial_uses: { u-1(7){ }}
;; lr in 0 [ax] 7 [sp]
;; lr use 7 [sp] <<<< [ax] is missing.
;; lr def
;; live in 0 [ax] 7 [sp]
;; live gen
;; live kill
(code_label 54 36 53 8 6 (nil) [2 uses])
(note 53 54 51 8 [bb 8] NOTE_INSN_BASIC_BLOCK)
;; succ: EXIT [always] count:114863532 (estimated locally) (FALLTHRU)
;; lr out 0 [ax] 7 [sp]
;; live out 0 [ax] 7 [sp]
>From gcc-bugs-return-641363-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 19:36:37 2019
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Subject: [Bug c++/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
Date: Fri, 19 Apr 2019 19:36:00 -0000
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--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
zveroupper pass drops:
(insn 36 37 51 8 (use (reg/i:DI 0 ax)) "x.i":8:1 -1
(nil))
>From gcc-bugs-return-641364-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 20:18:05 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug translation/90176] diagnostics should generally contain underscore only inside quotes
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Roland Illig <roland.illig at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46206|0 |1
is obsolete| |
--- Comment #3 from Roland Illig <roland.illig at gmx dot de> ---
Created attachment 46212
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46212&action=edit
linter with extended checks
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Subject: [Bug inline-asm/90181] Feature request: provide a way to explicitly select specific named registers in constraints
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90181
--- Comment #3 from nfxjfg at googlemail dot com ---
Yes, it's documented this way, but it makes it appear all kinds of fragile. For
one, I normally expect that the compiler will reorder and interleave any
statements in my code (because that's what compilers always tend to do from a
user's POV), so it seems weird that it works at all, since there is nothing
that strictly associates the register declaration and the asm block. Yes, the
gcc docs (the part you quoted in particular) sort of make it clear that it's
simply the lexical order of operations that matters here. In the gcc example
for example, the compiler can't just move the initialization of t1 below the p1
initialization, although with normal code it can and will do that.
Anyway, that is not the central point of this feature request. I only brought
it up as an argument that register variables are confusing and roundabout.
The central point of this feature request is that I'm asking for a way to
specify a named register in a contraint directly, instead of having to use this
detour over register variables. Can I ask why this feature request has been
rejected?
>From gcc-bugs-return-641366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 20:34:36 2019
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From: "lichray at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90190] New: [8/9 regression] CTAD confuses with {one element} initializer_list
Date: Fri, 19 Apr 2019 20:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90190
Bug ID: 90190
Summary: [8/9 regression] CTAD confuses with {one element}
initializer_list
Product: gcc
Version: 8.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 46213
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46213&action=edit
test case
https://godbolt.org/z/f8rKSG
#include <type_traits>
#include <initializer_list>
enum class X {};
struct Term {
double a;
X i;
};
template <class It = const Term *>
struct sum {
sum(std::initializer_list<Term>) {}
};
int main() {
auto c2 = sum{{1, X()}, {2, X()}};
auto c1 = sum{{1, X()}}; // fails only this
auto c0 = sum{{}};
}
<source>:18:25: note: cannot convert '{1, (X)0}' (type '<brace-enclosed
initializer list>') to type 'std::initializer_list<Term>'
auto c1 = sum{{1, X()}};
-- It's certainly convertible if you add <>.
Works in GCC 7, MSVC, Clang.
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From: "dimhen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90191] New: [9 regression] -Wformat-overflow depends on --param max-jump-thread-duplication-stmts\x17
Date: Fri, 19 Apr 2019 20:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90191
Bug ID: 90191
Summary: [9 regression] -Wformat-overflow depends on --param
max-jump-thread-duplication-stmts=17
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
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Reporter: dimhen at gmail dot com
Target Milestone: ---
r265568 PASS
r265754 FAIL
r270458 FAIL
Warn if compiled with "-O2 --param max-jump-thread-duplication-stmts=17"
And not warn if compiled with -O2
Original code fill & printf() 2 vectors of chars (pseudo-code see below)
-- If second vector is in "if() {}" then warning emitted.
-- If second vector is out of "if() {}" then no warning produced.
-- if printf() divided into 2 printf there are no warning.
$ cat a.ii
extern "C" int printf(const char *...);
struct i {
void j(char *p1, int) { delete p1; }
};
struct q {
typedef char &d;
};
struct t {
static char *u();
};
template <typename e, typename ab, typename g, typename h> void ad(e, ab, g,
h);
char *m;
struct v {
struct w {
char *l;
};
v(int p1) {
int o = p1, a = o;
m = a ? t::u() : 0;
n.l = m;
}
~v() {
char *c = n.l, *p = c;
int f = 0;
i k;
k.j(p, f);
}
w n;
};
int s;
struct x : v {
x() : v(y()) {
i b;
ad(0, 0, s, b);
}
q::d operator[](int p1) { return *(n.l + p1); }
static int y();
};
unsigned ap();
char r;
static int av() {
{
x d;
if (0)
goto ay;
char &e = d[0];
printf("%s = %s\n", &r, &e);
}
ay:
return 0;
}
unsigned ap() {
av();
return 0;
}
$ /usr/local/gcc_current/bin/g++ -O2 -fpreprocessed -Wall -Wextra -c a.ii
$ /usr/local/gcc_current/bin/g++ -O2 --param
max-jump-thread-duplication-stmts=17 -fpreprocessed -Wall -Wextra -c a.ii
In function 'int av()',
inlined from 'unsigned int ap()' at a.ii:53:5:
a.ii:47:11: warning: '%s' directive argument is null [-Wformat-overflow=]
47 | printf("%s = %s\n", &r, &e);
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~
Original code looks as
size_t l1, l2, sel;
if(foo_1(&l1))
goto err;
if(foo_2(&sel, &l2))
goto err;
std::vector<char> v(l1);
if(bar_1(&v[0])
goto err;
if(sel) {
std::vector<char> w(l2); // <--- if move out of block then warning disappears
if(bar_2(&w[0]))
goto err;
printf("%s = %s\n", &v[0], &w[0]); // <-- if divided to 2 calls then warning
disappears
return;
}
err:
return;
$ /usr/local/gcc_current/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc_current/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-pc-linux-gnu
Configured with: /home/dimhen/src/gcc_current/configure
--prefix=/usr/local/gcc_current --enable-checking=yes,df,fold,rtl,extra
--enable-languages=c,c++,lto --disable-multilib --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-gnu-unique-object
--enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-offload-targets=nvptx-none
--without-cuda-driver --enable-gnu-indirect-function --with-tune=native
Thread model: posix
gcc version 9.0.1 20190419 (experimental) [trunk revision 270458] (GCC)
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From: "lemo1234 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90192] New: std::vector<T>::resize() requires more than the CopyInsertable
Date: Fri, 19 Apr 2019 21:13:00 -0000
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Bug ID: 90192
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CopyInsertable
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std::vector<T>::resize(size_type count, const value_type& value) requires
CopyInsertable, but recent libstdc++ versions try to use the assignment
operator (https://godbolt.org/z/xrutNZ)
#include <vector>
struct X { const int c; };
void foo() {
std::vector<X> v;
v.resize(10, X{});
}
n file included from
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/vector:60,
from <source>:2:
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h: In
instantiation of 'typename __gnu_cxx::__enable_if<(!
std::__is_scalar<_Tp>::__value), void>::__type std::__fill_a(_ForwardIterator,
_ForwardIterator, const _Tp&) [with _ForwardIterator = X*; _Tp = X; typename
__gnu_cxx::__enable_if<(! std::__is_scalar<_Tp>::__value), void>::__type =
void]':
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h:731:20:
required from 'void std::fill(_ForwardIterator, _ForwardIterator, const _Tp&)
[with _ForwardIterator = X*; _Tp = X]'
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/vector.tcc:505:14:
required from 'void std::vector<_Tp, _Alloc>::_M_fill_insert(std::vector<_Tp,
_Alloc>::iterator, std::vector<_Tp, _Alloc>::size_type, const value_type&)
[with _Tp = X; _Alloc = std::allocator<X>; std::vector<_Tp, _Alloc>::iterator =
__gnu_cxx::__normal_iterator<X*, std::vector<X> >; typename
std::_Vector_base<_Tp, _Alloc>::pointer = X*; std::vector<_Tp,
_Alloc>::size_type = long unsigned int; std::vector<_Tp, _Alloc>::value_type =
X]'
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_vector.h:847:4:
required from 'void std::vector<_Tp, _Alloc>::resize(std::vector<_Tp,
_Alloc>::size_type, const value_type&) [with _Tp = X; _Alloc =
std::allocator<X>; std::vector<_Tp, _Alloc>::size_type = long unsigned int;
std::vector<_Tp, _Alloc>::value_type = X]'
<source>:8:21: required from here
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h:685:11:
error: use of deleted function 'X& X::operator=(const X&)'
*__first = __value;
~~~~~~~~~^~~~~~~~~
<source>:4:8: note: 'X& X::operator=(const X&)' is implicitly deleted because
the default definition would be ill-formed:
struct X { const int c; };
^
<source>:4:8: error: non-static const member 'const int X::c', can't use
default assignment operator
In file included from
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/vector:60,
from <source>:2:
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h: In
instantiation of 'static _Tp* std::__copy_move_backward<_IsMove, true,
std::random_access_iterator_tag>::__copy_move_b(const _Tp*, const _Tp*, _Tp*)
[with _Tp = X; bool _IsMove = true]':
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h:588:37:
required from '_BI2 std::__copy_move_backward_a(_BI1, _BI1, _BI2) [with bool
_IsMove = true; _BI1 = X*; _BI2 = X*]'
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h:598:5:
required from '_BI2 std::__copy_move_backward_a2(_BI1, _BI1, _BI2) [with bool
_IsMove = true; _BI1 = X*; _BI2 = X*]'
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h:668:48:
required from '_BI2 std::move_backward(_BI1, _BI1, _BI2) [with _BI1 = X*; _BI2
= X*]'
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/vector.tcc:503:5:
required from 'void std::vector<_Tp, _Alloc>::_M_fill_insert(std::vector<_Tp,
_Alloc>::iterator, std::vector<_Tp, _Alloc>::size_type, const value_type&)
[with _Tp = X; _Alloc = std::allocator<X>; std::vector<_Tp, _Alloc>::iterator =
__gnu_cxx::__normal_iterator<X*, std::vector<X> >; typename
std::_Vector_base<_Tp, _Alloc>::pointer = X*; std::vector<_Tp,
_Alloc>::size_type = long unsigned int; std::vector<_Tp, _Alloc>::value_type =
X]'
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_vector.h:847:4:
required from 'void std::vector<_Tp, _Alloc>::resize(std::vector<_Tp,
_Alloc>::size_type, const value_type&) [with _Tp = X; _Alloc =
std::allocator<X>; std::vector<_Tp, _Alloc>::size_type = long unsigned int;
std::vector<_Tp, _Alloc>::value_type = X]'
<source>:8:21: required from here
/opt/compiler-explorer/gcc-8.3.0/include/c++/8.3.0/bits/stl_algobase.h:566:19:
error: static assertion failed: type is not assignable
static_assert( __assignable::type::value, "type is not assignable" );
^~~~~~~~~~~~
Compiler returned: 1
>From gcc-bugs-return-641369-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 19 21:45:34 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90166] Compiler Fails at Assembler
Date: Fri, 19 Apr 2019 21:45:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P5 |P4
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
Target Milestone|--- |9.0
Severity|enhancement |minor
--- Comment #5 from kargl at gcc dot gnu.org ---
Patch submitted to mail listings.
https://gcc.gnu.org/ml/fortran/2019-04/msg00096.html
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
Date: Fri, 19 Apr 2019 21:59:00 -0000
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #3)
> It is caused by r266358.
The nop INSN can be removed by split_all_insns later:
if (INSN_P (insn))
{
rtx set = single_set (insn);
/* Don't split no-op move insns. These should silently
disappear later in final. Splitting such insns would
break the code that handles LIBCALL blocks. */
if (set && set_noop_p (set))
{
/* Nops get in the way while scheduling, so delete them
now if register allocation has already been done. It
is too risky to try to do this before register
allocation, and there are unlikely to be very many
nops then anyways. */
if (reload_completed)
delete_insn_and_edges (insn);
>From gcc-bugs-return-641371-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 00:05:17 2019
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Subject: [Bug other/90144] Use portable test(1) in isl/configure
Date: Sat, 20 Apr 2019 00:05:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |MOVED
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
isl is not part of the GCC project and is not included with GCC's sources.
The project page is http://isl.gforge.inria.fr/ .
>From gcc-bugs-return-641372-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 00:47:23 2019
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Subject: [Bug c++/90190] [8/9 regression] CTAD confuses with {one element} initializer_list
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-04-20
CC| |jason at gcc dot gnu.org
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Ever confirmed|0 |1
>From gcc-bugs-return-641373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 02:27:01 2019
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From: "mathieu.desnoyers at efficios dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/90193] New: asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
Date: Sat, 20 Apr 2019 02:27:00 -0000
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Bug ID: 90193
Summary: asm goto with TLS "m" input operand generates
incorrect assembler in O1 and O2
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: mathieu.desnoyers at efficios dot com
Target Milestone: ---
This issue can be reproduced with:
gcc version 8.3.0 (GCC)
Target: x86_64-pc-linux-gnu
Configured with: ./configure --prefix=/home/efficios/local
Command line reproducing the bug:
/home/efficios/local/bin/gcc -O1 -o test-asm-goto test-asm-goto.c
(same with -O2)
Compiler output:
/tmp/ccsWO2Fm.o: In function `main':
test-asm-goto.c:(.text+0x1): undefined reference to `.L2'
collect2: error: ld returned 1 exit status
Preprocessed file reproducing the bug:
# 1 "test-asm-goto.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 32 "<command-line>" 2
# 1 "test-asm-goto.c"
__thread int var;
static int fct(void)
{
asm goto ( "jmp %l[testlabel]\n\t"
: : [var] "m" (var) : : testlabel);
return 0;
testlabel:
return 1;
}
int main()
{
return fct();
}
It works fine with gcc 7.3.0 with and without optimizations, and it works fine
with gcc 8.3.0 without optimizations. It also affects compilation with -m32
(32-bit x86).
>From gcc-bugs-return-641374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 04:38:30 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90169] Setting an allocatable variable length character array in a type incorrectly sets all members of the array
Date: Sat, 20 Apr 2019 04:38:00 -0000
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--- Comment #2 from menospaamthereaper at hotmail dot com ---
(In reply to kargl from comment #1)
> The problem is fixed on trunk. Don't know if anyone intends to back port.
> Doubt it as no one has done so.
>
> PR 78578 is irrelevant as the individual who submitted
> the testcase has a typo in his/her code.
Thanks kargl, can you identify for which release(s) this case works correctly?
>From gcc-bugs-return-641375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 04:42:08 2019
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Subject: [Bug fortran/90169] Setting an allocatable variable length character array in a type incorrectly sets all members of the array
Date: Sat, 20 Apr 2019 04:42:00 -0000
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--- Comment #3 from menospaamthereaper at hotmail dot com ---
Also why was this bug marked as resolved / invalid? It still exists for 7.3.0
whether or not it will be resolved, and is rather serious.
>From gcc-bugs-return-641376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 04:55:33 2019
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From: "jed at 59A2 dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/32605] Missing byte swap optimizations
Date: Sat, 20 Apr 2019 04:55:00 -0000
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Jed Brown <jed at 59A2 dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jed at 59A2 dot org
--- Comment #5 from Jed Brown <jed at 59A2 dot org> ---
The missed optimization even exists for code such as this, which should compile
to a simple load on LE architectures.
unsigned read_u32_le(const unsigned char arr[]) {
return (arr[0] << 0)
| (arr[1] << 8)
| (arr[2] << 16)
| (arr[3] << 24);
}
gcc-8.3/trunk -O:
read_u32_le:
movzx eax, BYTE PTR [rdi+1]
sal eax, 8
movzx edx, BYTE PTR [rdi+2]
sal edx, 16
or eax, edx
movzx edx, BYTE PTR [rdi]
or eax, edx
movzx edx, BYTE PTR [rdi+3]
sal edx, 24
or eax, edx
ret
clang-8 -O:
read_u32_le: # @read_u32_le
mov eax, dword ptr [rdi]
ret
https://gcc.godbolt.org/z/8lGeCF
>From gcc-bugs-return-641377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 05:38:01 2019
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90169] Setting an allocatable variable length character array in a type incorrectly sets all members of the array
Date: Sat, 20 Apr 2019 05:37:00 -0000
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--- Comment #4 from kargl at gcc dot gnu.org ---
(In reply to menospaamthereaper from comment #2)
> (In reply to kargl from comment #1)
> > The problem is fixed on trunk. Don't know if anyone intends to back port.
> > Doubt it as no one has done so.
> >
> > PR 78578 is irrelevant as the individual who submitted
> > the testcase has a typo in his/her code.
>
> Thanks kargl, can you identify for which release(s) this case works
> correctly?
I already have. The problem is fixed on trunk. The first
release with the fix will be 9.1, which should be released
in the next few weeks.
>From gcc-bugs-return-641378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 05:41:18 2019
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90169] Setting an allocatable variable length character array in a type incorrectly sets all members of the array
Date: Sat, 20 Apr 2019 05:41:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |WONTFIX
--- Comment #5 from kargl at gcc dot gnu.org ---
(In reply to menospaamthereaper from comment #3)
> Also why was this bug marked as resolved / invalid? It still exists for
> 7.3.0 whether or not it will be resolved, and is rather serious.
I choose the wrong menu item. Changing it to WONTFIX.
The allocation/deallocation is fairly complicated. Whether
a patch is back ported depends on the person who fixed the
bug and how difficult the back may be. There are too many
bugs to fix and features to implement for the available
man power.
>From gcc-bugs-return-641380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 06:19:16 2019
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90190] [8/9 regression] CTAD confuses with {one element} initializer_list
Date: Sat, 20 Apr 2019 06:19:00 -0000
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Apr 20 06:18:39 2019
New Revision: 270468
URL: https://gcc.gnu.org/viewcvs?rev=270468&root=gcc&view=rev
Log:
PR c++/90190 - CTAD with list-constructor.
The passage quoted talks about an initializer list containing a single
expression, but a braced-init-list is not an expression.
* pt.c (do_class_deduction): Don't try the single element deduction
if the single element is also a braced list.
Added:
trunk/gcc/testsuite/g++.dg/cpp1z/class-deduction65.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug c++/90171] [9 Regression] ICE in build_op_delete_call, at cp/call.c:6630
Date: Sat, 20 Apr 2019 06:19:00 -0000
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Sat Apr 20 06:18:30 2019
New Revision: 270467
URL: https://gcc.gnu.org/viewcvs?rev=270467&root=gcc&view=rev
Log:
PR c++/90171 - ICE with destroying delete with size_t parm.
The problem here was that "second parm is size_t" is false for a destroying
sized delete. So let's introduce sized_deallocation_fn_p when that's what
we're asking, and reserve second_parm_is_size_t for the specific case of
warning about possible confusion with placement delete.
* call.c (sized_deallocation_fn_p): New. Use it instead of
second_parm_is_size_t in most cases.
(second_parm_is_size_t): Don't check for aligned.
Added:
trunk/gcc/testsuite/g++.dg/cpp2a/destroying-delete4.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
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Subject: [Bug c++/90171] [9 Regression] ICE in build_op_delete_call, at cp/call.c:6630
Date: Sat, 20 Apr 2019 06:20:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/90169] Setting an allocatable variable length character array in a type incorrectly sets all members of the array
Date: Sat, 20 Apr 2019 06:33:00 -0000
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--- Comment #6 from menospaamthereaper at hotmail dot com ---
Thank you for the update and your hard work, kargl.
>From gcc-bugs-return-641383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 06:35:21 2019
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Subject: [Bug inline-asm/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
Date: Sat, 20 Apr 2019 06:35:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |wrong-code
Last reconfirmed| |2019-04-20
CC| |amonakov at gcc dot gnu.org
Ever confirmed|0 |1
Summary|asm goto with TLS "m" input |[8/9 Regression] asm goto
|operand generates incorrect |with TLS "m" input operand
|assembler in O1 and O2 |generates incorrect
| |assembler in O1 and O2
Known to fail| |8.3.0, 9.0
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
split1 transforms JUMP_INSN with the asm into a plain INSN, after which the cfg
becomes corrupted in various ways.
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Subject: [Bug fortran/57284] [OOP] ICE with find_array_spec for polymorphic arrays
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |pault at gcc dot gnu.org
--- Comment #8 from Paul Thomas <pault at gcc dot gnu.org> ---
I posted a full fix for this yesterday.
Paul
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Subject: [Bug testsuite/81058] FAIL: gcc.target/i386/avx512bw-vpmovu?swb-1.c scan-assembler-times vpmovu?swb.*
Date: Sat, 20 Apr 2019 08:33:00 -0000
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--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #5)
> Created attachment 46210 [details]
> Patch for testing
>
> Darwin doesn't support non-pic for user-space programs, so these tests fail
> (and the codeine is sufficiently different that it would be better to write
> a second set of tests if that is seen as useful). {aside, why is there no
> PIC test for Linux, I guess?]
>
> There is "dynamic-no-pic" for m32 but it doesn't seem worth jumping through
> hoops to make a test case for that, since it's not realistically going to be
> used on a machine supporting AVX512.
there could be a better solution here - remove the need for indirection [Darwin
indirects common accesses] (and hence the change in codegen).
/* { dg-additional-options "-fno-common" { target *-*-darwin* } } */
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Subject: [Bug tree-optimization/32605] Missing byte swap optimizations
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jed Brown from comment #5)
> The missed optimization even exists for code such as this, which should
> compile to a simple load on LE architectures.
That is because GCC decided to only optimize this code at -O2 and above.
Rather than at -O1. IIRC this is because in some cases it can introduce some
bigger decrease compile time.
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Subject: [Bug fortran/90169] Setting an allocatable variable length character array in a type incorrectly sets all members of the array
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|WONTFIX |DUPLICATE
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I think it is a duplicate of pr72709.
*** This bug has been marked as a duplicate of bug 72709 ***
>From gcc-bugs-return-641388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 11:18:18 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/72709] Incorrect assignment of allocatable character array used as component of derived type
Date: Sat, 20 Apr 2019 11:18:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |menospaamthereaper@hotmail.
| |com
--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 90169 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-641390-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 11:19:27 2019
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/68241] [meta-bug] [F03] Deferred-length character
Date: Sat, 20 Apr 2019 11:19:00 -0000
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Bug 68241 depends on bug 70752, which changed state.
Bug 70752 Summary: Incorrect LEN for ALLOCATABLE CHARACTER
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70752
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug fortran/70752] Incorrect LEN for ALLOCATABLE CHARACTER
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
pr72709 is resolved as FIXED, closing.
>From gcc-bugs-return-641391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 11:23:33 2019
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Subject: [Bug fortran/90150] wrong output produced by float format fX.Y descriptor following translated scientific format XpeY.Z
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Apparently this is what the FORTRAN standard features. Still,
> I’m a bit confused that the P descriptor produces only a format
> change with the E format, while leading to a _value_ change with F.
I agree it's confusing, but it is how it should work.
>From gcc-bugs-return-641392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 11:26:41 2019
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90194] New: ICE in expand_debug_expr, at cfgexpand.c:5244
Date: Sat, 20 Apr 2019 11:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90194
Bug ID: 90194
Summary: ICE in expand_debug_expr, at cfgexpand.c:5244
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-checking
Severity: normal
Priority: P3
Component: debug
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Target Milestone: ---
g++-9.0.0-alpha20190407 snapshot (r270192) ICEs when compiling the following
testcase at any optimization level (except -Og) and w/ -g:
struct cb {
int yr;
};
void *
operator new (__SIZE_TYPE__, void *nq)
{
return nq;
}
void
af (int xn)
{
new (&xn) cb { };
}
% g++-9.0.0-alpha20190407 -O1 -g -c vquxpovp.cc
<constructor 0x7fd5336356d8
type <record_type 0x7fd53360e690 cb asm_written type_5 type_6 SI
size <integer_cst 0x7fd5334d9078 constant 32>
unit-size <integer_cst 0x7fd5334d9090 constant 4>
align:32 warn_if_not_align:0 symtab:860696976 alias-set 1
canonical-type 0x7fd53360e690
fields <function_decl 0x7fd533613f00 __dt type <method_type
0x7fd533628738>
public abstract external autoinline decl_3 QI vquxpovp.cc:1:8
align:16 warn_if_not_align:0 context <record_type 0x7fd53360e690 cb>
full-name "cb::~cb() noexcept (<uninstantiated>)"
not-really-extern chain <function_decl 0x7fd533629100 __dt_base >>
context <translation_unit_decl 0x7fd5334c4168 vquxpovp.cc>
full-name "struct cb"
X() X(constX&) this=(X&) n_parents=0 use_template=0 interface-unknown
pointer_to_this <pointer_type 0x7fd53360ebd0> reference_to_this
<reference_type 0x7fd5336282a0> chain <type_decl 0x7fd5335da688 cb>>
constant static tree_0 length:0>
during RTL pass: expand
vquxpovp.cc: In function 'void af(int)':
vquxpovp.cc:12:1: internal compiler error: in expand_debug_expr, at
cfgexpand.c:5244
12 | af (int xn)
| ^~
0xb29d93 expand_debug_expr
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/cfgexpand.c:5244
0xb2a044 expand_debug_expr
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/cfgexpand.c:4560
0xb359e3 expand_debug_locations
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/cfgexpand.c:5442
0xb359e3 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190407/work/gcc-9-20190407/gcc/cfgexpand.c:6512
g++ 8.3, 7.4, 6.3 fail differently:
% g++-8.3.0 -O1 -fchecking -g -c vquxpovp.cc
vquxpovp.cc: In function 'void af(int)':
vquxpovp.cc:12:1: error: invalid reference prefix
af (int xn)
^~
{}
vquxpovp.cc:14:3: note: in statement
new (&xn) cb { };
^~~~~~~~~~~~~~~~
xn_5 = VIEW_CONVERT_EXPR<int>({});
vquxpovp.cc:12: confused by earlier errors, bailing out
>From gcc-bugs-return-641393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 13:18:11 2019
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From: "pat at rack911labs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/90195] New: GCC: Insecure Tmp Write(s) / Arbitrary Data Injection
Date: Sat, 20 Apr 2019 13:18:00 -0000
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Bug ID: 90195
Summary: GCC: Insecure Tmp Write(s) / Arbitrary Data Injection
Product: gcc
Version: 4.8.5
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Priority: P3
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While auditing some third party software, I noticed that when performing a
basic compile with gcc that it does a few insecure file operations under /tmp/
that allows data to be arbitrarily injected.
For example:
open("/tmp/ccQaUMl2.ld", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
open("/tmp/ccQaUMl2.ld", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3
open("/tmp/ccQaUMl2.ld", O_RDONLY) = 3
unlink("/tmp/ccQaUMl2.ld") = 0
open("/tmp/ccQaUMl2.ld", O_RDONLY) = -1 ENOENT (No such file or directory)
The unlink() and following open() allow for data to be easily injected into
that file using inotifywait since the filename remains the same. I wrote a
quick shell script to demonstrate:
user@cpanel [~]# cat demo.sh
#!/bin/sh
inotifywait -m /tmp/ -e DELETE |
while read path action file; do
echo "This shouldn't happen!" > /tmp/$file
done
user@cpanel [~]# sh demo.sh
Setting up watches.
Watches established.
Another user then compiles something:
[root@cpanel ~]# cat example.c
#include <stdio.h>
int main()
{
printf("Hello, World!");
return 0;
}
[root@cpanel ~]#
[root@cpanel ~]# gcc -Wall -o example /root/example.c
This shouldn't happen!
This shouldn't happen!
[root@cpanel ~]#
* This was initially reported to cPanel but they believe this to be a gcc
upstream security flaw. I'm not sure what component to file this under, please
move it if necessary. Thanks!
>From gcc-bugs-return-641394-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 13:19:06 2019
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From: "mathieu.desnoyers at efficios dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
Date: Sat, 20 Apr 2019 13:19:00 -0000
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--- Comment #2 from Mathieu Desnoyers <mathieu.desnoyers at efficios dot com> ---
By the way, it can also be reproduced by replacing the "jmp" instruction within
the inline asm by a ".long":
# 1 "test-asm-goto-data.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 31 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 32 "<command-line>" 2
# 1 "test-asm-goto-data.c"
__thread int var;
static int fct(void)
{
asm goto ( ".long %l[testlabel]\n\t"
: : [var] "m" (var) : : testlabel);
return 0;
testlabel:
return 1;
}
int main()
{
return fct();
}
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/90195] GCC: Insecure Tmp Write(s) / Arbitrary Data Injection
Date: Sat, 20 Apr 2019 15:15:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Use a TMPDIR env if you want to prevent other users from getting access to
files.
This is a minor security hole really because it allows a person with already
have access to do bad things. If you trust an user to have an user account
then you have to trust enough not do bad things.
>From gcc-bugs-return-641396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 15:35:22 2019
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From: "pat at rack911labs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/90195] GCC: Insecure Tmp Write(s) / Arbitrary Data Injection
Date: Sat, 20 Apr 2019 15:35:00 -0000
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--- Comment #2 from pat at rack911labs dot com ---
(In reply to Andrew Pinski from comment #1)
> Use a TMPDIR env if you want to prevent other users from getting access to
> files.
>
> This is a minor security hole really because it allows a person with already
> have access to do bad things. If you trust an user to have an user account
> then you have to trust enough not do bad things.
Unless of course you run a shared hosting environment, etc.
While I agree it is a pretty minor issue, it is still a security vulnerability
that should be addressed outside of expecting developers to set a TMPDIR env.
>From gcc-bugs-return-641397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 15:38:10 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90167] invalid example in GCC documentation wrt. effective type rules
Date: Sat, 20 Apr 2019 15:38:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |segher at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The code accesses d, of type double, as an int. That is not a compatible
type. It does not matter how it got there, what pointer casts trickery
with unions it did.
You can access a union type as the type of any of its members. But a double
is not a union type.
>From gcc-bugs-return-641398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 15:39:23 2019
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Subject: [Bug fortran/90166] Compiler Fails at Assembler
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-20
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>From gcc-bugs-return-641399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 17:15:26 2019
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Subject: [Bug d/89293] libphobos: core.atomic should have fallback for no atomic library
Date: Sat, 20 Apr 2019 17:15:00 -0000
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--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Sat Apr 20 17:14:50 2019
New Revision: 270470
URL: https://gcc.gnu.org/viewcvs?rev=270470&root=gcc&view=rev
Log:
libphobos: core.atomic should have fallback when there's no libatomic.
libphobos/ChangeLog:
2019-04-20 Iain Buclaw <ibuclaw@gdcproject.org>
PR d/89293
* libdruntime/core/atomic.d (casImpl): Remove static assert for
GNU_Have_Atomics, add static path to handle missing atomic support.
(atomicLoad): Likewise.
(atomicStore): Likewise.
(atomicFence): Likewise.
(atomicMutexHandle, AtomicMutex): Declare types.
(_getAtomicMutex): New function.
(getAtomicMutex): Declare.
Modified:
trunk/libphobos/ChangeLog
trunk/libphobos/libdruntime/core/atomic.d
>From gcc-bugs-return-641400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 17:22:16 2019
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Subject: [Bug d/89293] libphobos: core.atomic should have fallback for no atomic library
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Dealt with in r270470.
>From gcc-bugs-return-641401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 18:18:20 2019
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/90195] GCC: Insecure Tmp Write(s) / Arbitrary Data Injection
Date: Sat, 20 Apr 2019 18:18:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2019-04-20
Component|other |driver
Ever confirmed|0 |1
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
do_tlink in tlink.c is the issue.
We should just truncate the file instead of unlink the two files there.
Unlinking also can cause other issues where another call to mktemp will cause
those files to exist for another process.
So it is not too bad of a security bug as it is only printing out to stdout and
stderr though.
This code dates back to before 1997.
>From gcc-bugs-return-641402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 18:19:13 2019
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From: "ppluzhnikov at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/83029] Memory leaks due to leaked thread local variable
Date: Sat, 20 Apr 2019 18:19:00 -0000
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Paul Pluzhnikov <ppluzhnikov at google dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ppluzhnikov at google dot com
--- Comment #2 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
We just hit the same bug. Confirmed in 9.0.1 20190216 (experimental) -- the
latest trunk build I have.
Trivial test case (similar to the original, but makes it easy to tell what's
going on).
------------ cut ------------
#include <iostream>
#include <memory>
#include <thread>
class Box {
public:
explicit Box(const char *s) : s_(s) {}
~Box() {
std::cout << s_ << std::endl;
}
private:
const char *const s_;
};
int main() {
thread_local std::unique_ptr<Box> box;
std::cout << "line " << __LINE__ << ": " << &box << std::endl;
box.reset(new Box("Main thread"));
std::thread thread0([&] {
std::cout << "line " << __LINE__ << ": " << &box << std::endl;
std::thread thread1([&] {
std::cout << "line " << __LINE__ << ": " << &box << std::endl;
box.reset(new Box("thread1a"));
box.reset(new Box("thread1b"));
});
thread1.join();
box.reset(new Box("thread0A"));
box.reset(new Box("thread0B"));
});
thread0.join();
std::cout << "END" << std::endl;
}
------------ cut ------------
g++ -g -fsanitize=leak -pthread thr.cc && ./a.out
line 18: 0x7f95ae9e02f0
line 23: 0x7f95abeff6f0
line 26: 0x7f95ab6fe6f0
thread1a
thread0A
END
Main thread
=================================================================
==207583==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 8 byte(s) in 1 object(s) allocated from:
#0 0x7f95ad954840 in operator new(unsigned long)
(/usr/lib/x86_64-linux-gnu/liblsan.so.0+0xf840)
#1 0x558bd33cb127 in operator() /tmp/thr.cc:28
#2 0x558bd33cb6cc in __invoke_impl<void, main()::<lambda()>::<lambda()> >
/usr/include/c++/7/bits/invoke.h:60
#3 0x558bd33cb411 in __invoke<main()::<lambda()>::<lambda()> >
/usr/include/c++/7/bits/invoke.h:95
#4 0x558bd33cbc5d in _M_invoke<0> /usr/include/c++/7/thread:234
#5 0x558bd33cbc02 in operator() /usr/include/c++/7/thread:243
#6 0x558bd33cbbbd in _M_run /usr/include/c++/7/thread:186
#7 0x7f95ad67cb22 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbcb22)
Direct leak of 8 byte(s) in 1 object(s) allocated from:
#0 0x7f95ad954840 in operator new(unsigned long)
(/usr/lib/x86_64-linux-gnu/liblsan.so.0+0xf840)
#1 0x558bd33cb228 in operator() /tmp/thr.cc:33
#2 0x558bd33cb864 in __invoke_impl<void, main()::<lambda()> >
/usr/include/c++/7/bits/invoke.h:60
#3 0x558bd33cb4e2 in __invoke<main()::<lambda()> >
/usr/include/c++/7/bits/invoke.h:95
#4 0x558bd33cbc31 in _M_invoke<0> /usr/include/c++/7/thread:234
#5 0x558bd33cbbde in operator() /usr/include/c++/7/thread:243
#6 0x558bd33cbb9d in _M_run /usr/include/c++/7/thread:186
#7 0x7f95ad67cb22 (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbcb22)
SUMMARY: LeakSanitizer: 16 byte(s) leaked in 2 allocation(s).
Here we can observe that:
1. there are 3 separate instances of std::unique_ptr<Box> (as expected), but
2. only 1 of these instances is destructed, the other two are leaked.
>From gcc-bugs-return-641403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 18:31:52 2019
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Subject: [Bug tree-optimization/88775] [8/9 Regression] Optimize std::string assignment
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #20 from Eric Gallager <egallager at gcc dot gnu.org> ---
came up on the mailing lists here:
https://gcc.gnu.org/ml/gcc/2019-04/msg00202.html
>From gcc-bugs-return-641404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 18:44:53 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
Date: Sat, 20 Apr 2019 18:44:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
Component|inline-asm |target
Target Milestone|--- |8.4
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a target issue ...
I think is the insn and split which causes the problem:
(define_insn_and_split "*add_tp_<mode>"
[(set (match_operand:PTR 0 "register_operand" "=r")
(plus:PTR
(unspec:PTR [(const_int 0)] UNSPEC_TP)
(match_operand:PTR 1 "register_operand" "0")))
(clobber (reg:CC FLAGS_REG))]
""
"#"
""
[(parallel
[(set (match_dup 0)
(plus:PTR (match_dup 1) (match_dup 2)))
(clobber (reg:CC FLAGS_REG))])]
{
addr_space_t as = DEFAULT_TLS_SEG_REG;
operands[2] = gen_const_mem (<MODE>mode, const0_rtx);
set_mem_addr_space (operands[2], as);
})
Which was introduced/changed in r251075.
>From gcc-bugs-return-641405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 19:03:32 2019
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Subject: [Bug libstdc++/83029] Memory leaks due to leaked thread local variable
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--- Comment #3 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
Reconfirmed with today trunk (r270470).
>From gcc-bugs-return-641406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 19:30:59 2019
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Subject: [Bug d/90130] gdc.test/runnable/test12.d FAILs
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--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Rainer Orth from comment #0)
> The gdc.test/runnable/test12.d test FAILs on Solaris 11/SPARC with Robin's
> big-endian
> patches applied:
>
> FAIL: gdc.test/runnable/test12.d -finline-functions -funittest -g
> execution test
>
> core.exception.AssertError@runnable/test12.d(630): Assertion failure
> ----------------
-- snip --
> (gdb) p/x *(int *)&s
> $9 = 0x1020304
>
> I don't fully see why yet, however all this strongly argues that this part of
> testcase is bogus: you cannot pass a struct to sprintf whose format string
> expects an int.
I'm not sure the reason for the test - there's no upstream bugzilla reference,
and it was added 10 years or so back in one big bulk import.
Rather than removing outright, I guess using *cast(int*)&s as you've been doing
in gdb is probably the path of least resistance.
>From gcc-bugs-return-641407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 20:56:44 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It actually ICEs if you have checking enabled.
>From gcc-bugs-return-641408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 20:59:33 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #4)
> It actually ICEs if you have checking enabled.
Didn't for me with:
GNU C17 (GCC) version 9.0.1 20190401 (experimental) [master revision
449a19898aa:0239598e3c8:8fe074cf790f632b22e59c24f102e528407bb04e]
(x86_64-pc-linux-gnu)
compiled by GNU C version 9.0.1 20190401 (experimental) [master
revision 449a19898aa:0239598e3c8:8fe074cf790f632b22e59c24f102e528407bb04e], GMP
version 6.1.2, MPFR version 4.0.1, MPC version 1.1.0, isl version none
>From gcc-bugs-return-641409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 21:04:51 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It emits an insn instead if a jump_insn in the asm, during split1, in
(define_split
[(match_operand 0 "tls_address_pattern")]
"TARGET_TLS_DIRECT_SEG_REFS"
[(match_dup 0)]
"operands[0] = ix86_rewrite_tls_address (operands[0]);")
>From gcc-bugs-return-641410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 21:35:17 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
The same splitter is what causes the bb of the asm to be marked as
always falling through, which is why that non-fallthrough label is
eventually deleted.
>From gcc-bugs-return-641411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 21:39:26 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
Date: Sat, 20 Apr 2019 21:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90193
--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(As Alexander said in comment 1... I need to learn how to read some day).
>From gcc-bugs-return-641412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 21:58:42 2019
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From: "maxim.prohorenko at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90196] New: std:: types unused without warnings but simple type not affected
Date: Sat, 20 Apr 2019 21:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90196
Bug ID: 90196
Summary: std:: types unused without warnings but simple type
not affected
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: maxim.prohorenko at gmail dot com
Target Milestone: ---
#include <vector>
#include <bitset>
int main()
{
std::bitset<20> std_unused_bitset;
std::vector<int> std_unused_vector;
double unused_double = 0;
int unused_int = 0;
}
Start
Using built-in specs.
COLLECT_GCC=/opt/wandbox/gcc-head/bin/g++
COLLECT_LTO_WRAPPER=/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../source/configure --prefix=/opt/wandbox/gcc-head
--enable-languages=c,c++ --disable-multilib --without-ppl --without-cloog-ppl
--enable-checking=release --disable-nls --enable-lto
LDFLAGS=-Wl,-rpath,/opt/wandbox/gcc-head/lib,-rpath,/opt/wandbox/gcc-head/lib64,-rpath,/opt/wandbox/gcc-head/lib32
Thread model: posix
gcc version 9.0.1 20190419 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-o' 'prog.exe' '-I' '/opt/wandbox/boost-sml/include' '-I'
'/opt/wandbox/boost-di/include' '-I' '/opt/wandbox/range-v3/include' '-I'
'/opt/wandbox/nlohmann-json/src' '-I' '/opt/wandbox/cmcstl2/include' '-I'
'/opt/wandbox/te/include' '-Wpedantic' '-Wextra' '-v' '-std=gnu++2a' '-Wall'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/cc1plus -quiet -v
-I /opt/wandbox/boost-sml/include -I /opt/wandbox/boost-di/include -I
/opt/wandbox/range-v3/include -I /opt/wandbox/nlohmann-json/src -I
/opt/wandbox/cmcstl2/include -I /opt/wandbox/te/include -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE prog.cc -quiet -dumpbase prog.cc -mtune=generic
-march=x86-64 -auxbase prog -Wpedantic -Wextra -Wall -std=gnu++2a -version -o
/tmp/ccMrqaZh.s
GNU C++17 (GCC) version 9.0.1 20190419 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 9.0.1 20190419 (experimental), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory
"/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../../../x86_64-pc-linux-gnu/include"
ignoring nonexistent directory "/opt/wandbox/nlohmann-json/src"
#include "..." search starts here:
#include <...> search starts here:
/opt/wandbox/boost-sml/include
/opt/wandbox/boost-di/include
/opt/wandbox/range-v3/include
/opt/wandbox/cmcstl2/include
/opt/wandbox/te/include
/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../../../include/c++/9.0.1
/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../../../include/c++/9.0.1/x86_64-pc-linux-gnu
/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../../../include/c++/9.0.1/backward
/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/include
/opt/wandbox/gcc-head/include
/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C++17 (GCC) version 9.0.1 20190419 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 9.0.1 20190419 (experimental), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 5727b3035a99e91491262c43ff2f6952
prog.cc: In function 'int main()':
prog.cc:9:10: warning: unused variable 'unused_double' [-Wunused-variable]
9 | double unused_double = 0;
| ^~~~~~~~~~~~~
prog.cc:10:7: warning: unused variable 'unused_int' [-Wunused-variable]
10 | int unused_int = 0;
| ^~~~~~~~~~
COLLECT_GCC_OPTIONS='-o' 'prog.exe' '-I' '/opt/wandbox/boost-sml/include' '-I'
'/opt/wandbox/boost-di/include' '-I' '/opt/wandbox/range-v3/include' '-I'
'/opt/wandbox/nlohmann-json/src' '-I' '/opt/wandbox/cmcstl2/include' '-I'
'/opt/wandbox/te/include' '-Wpedantic' '-Wextra' '-v' '-std=gnu++2a' '-Wall'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
as -v -I /opt/wandbox/boost-sml/include -I /opt/wandbox/boost-di/include -I
/opt/wandbox/range-v3/include -I /opt/wandbox/nlohmann-json/src -I
/opt/wandbox/cmcstl2/include -I /opt/wandbox/te/include --64 -o /tmp/ccgTBy2z.o
/tmp/ccMrqaZh.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COMPILER_PATH=/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/:/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/:/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/:/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/:/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/
LIBRARY_PATH=/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/:/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../../../lib64/:/lib/x86_64-linux-gnu/:/lib/../lib64/:/usr/lib/x86_64-linux-gnu/:/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-o' 'prog.exe' '-I' '/opt/wandbox/boost-sml/include' '-I'
'/opt/wandbox/boost-di/include' '-I' '/opt/wandbox/range-v3/include' '-I'
'/opt/wandbox/nlohmann-json/src' '-I' '/opt/wandbox/cmcstl2/include' '-I'
'/opt/wandbox/te/include' '-Wpedantic' '-Wextra' '-v' '-std=gnu++2a' '-Wall'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/collect2 -plugin
/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/liblto_plugin.so
-plugin-opt=/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.1/lto-wrapper
-plugin-opt=-fresolution=/tmp/cckzTO8R.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc
--eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o
prog.exe /usr/lib/x86_64-linux-gnu/crt1.o /usr/lib/x86_64-linux-gnu/crti.o
/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/crtbegin.o
-L/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1
-L/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../../../lib64
-L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu
-L/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/../../.. -rpath
/opt/wandbox/gcc-head/lib64 -lpthread /tmp/ccgTBy2z.o -lstdc++ -lm -lgcc_s
-lgcc -lc -lgcc_s -lgcc
/opt/wandbox/gcc-head/lib/gcc/x86_64-pc-linux-gnu/9.0.1/crtend.o
/usr/lib/x86_64-linux-gnu/crtn.o
COLLECT_GCC_OPTIONS='-o' 'prog.exe' '-I' '/opt/wandbox/boost-sml/include' '-I'
'/opt/wandbox/boost-di/include' '-I' '/opt/wandbox/range-v3/include' '-I'
'/opt/wandbox/nlohmann-json/src' '-I' '/opt/wandbox/cmcstl2/include' '-I'
'/opt/wandbox/te/include' '-Wpedantic' '-Wextra' '-v' '-std=gnu++2a' '-Wall'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
0
Finish
No Wrap
>From gcc-bugs-return-641413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 22:04:58 2019
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From: "maxim.prohorenko at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90196] std:: types unused without warnings but simple type not affected
Date: Sat, 20 Apr 2019 22:04:00 -0000
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--- Comment #1 from МакÑим Прохоренко <maxim.prohorenko at gmail dot com> ---
Start
prog.cc:6:19: warning: unused variable 'std_unused_bitset' [-Wunused-variable]
std::bitset<20> std_unused_bitset;
^
prog.cc:9:10: warning: unused variable 'unused_double' [-Wunused-variable]
double unused_double = 0;
^
prog.cc:10:7: warning: unused variable 'unused_int' [-Wunused-variable]
int unused_int = 0;
^
3 warnings generated.
0
Finish clang-8.0.0
But vector?
>From gcc-bugs-return-641414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 22:19:44 2019
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Subject: [Bug preprocessor/60875] `_Pragma("message \"foo\")"` doesn't work in expression contexts.
Date: Sat, 20 Apr 2019 22:19:00 -0000
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--- Comment #6 from Nikita Kniazev <nok.raven at gmail dot com> ---
> Those pragmas are all extensions, so the standard doesn't cover them.
There was a Clang bug report recently with a pretty much same code I had posted
previously and Clang developers said that it is ill-formed with a reference to
the C11 standard https://bugs.llvm.org/show_bug.cgi?id=41514#c1
>From gcc-bugs-return-641415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 20 23:34:41 2019
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/90181] Feature request: provide a way to explicitly select specific named registers in constraints
Date: Sat, 20 Apr 2019 23:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90181
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2019-04-20
CC| |segher at gcc dot gnu.org
Resolution|WONTFIX |---
Ever confirmed|0 |1
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to nfxjfg from comment #0)
> Currently, inline assembler constraints have no way to select an explicitly
> named register. Apparently you're supposed to use register variables. There
> is even text that register variables exist only for this use case.
That is not what it says. Originally a local register variable lived in
the specified register always. This quickly was found out to not really
work. After many years it was finally documented as just not supported
for anything but assembler operands.
Hopefully it will actually do *only* this in the not too far future. We
should be able to make (almost) all gotchas here magically disappear.
> For example, suppose you want to pass something through the register a7 on
> the RISC-V platform. You need to do:
>
> void call_ecall(size_t num)
> {
> register size_t r_a7 __asm("a7") = num;
> __asm volatile("ecall" : : "r" (r_a7) : "memory");
> }
>
> This gets awkward fast. It adds a lot of extra noise if you have many
> registers to pass (the ecall instruction provides an example where this may
> be needed).
Does the riscv port not have a builtin for this?
> The semantics are also not entirely clear: will r_a7 occupy the a7 register
> for the entire function
It does not matter: you are only allowed to pass it to the asm, and nothing
else is defined behaviour.
> void call_ecall(size_t num)
> {
> __asm volatile("ecall" : : "a7" (num) : "memory");
> }
Because a7 is not a constraint. It also cannot *be* one, in general;
for example, many archs have a register "r0" but the constraint "r0"
already means something else.
So we need some new syntax for this. I suggested "*a7" before.
Confirmed. It's a reasonable request, and it is a feature that would make
GCC better, and isn't too hard to define or implement. Reopening.
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Subject: [Bug inline-asm/90181] Feature request: provide a way to explicitly select specific named registers in constraints
Date: Sat, 20 Apr 2019 23:44:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually it is not as bad if you use preprocessor tricks.
Like this code from glibc for aarch64:
# undef INTERNAL_SYSCALL_RAW
# define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \
({ long _sys_result; \
{ \
LOAD_ARGS_##nr (args) \
register long _x8 asm ("x8") = (name); \
asm volatile ("svc 0 // syscall " # name \
: "=r" (_x0) : "r"(_x8) ASM_ARGS_##nr : "memory"); \
_sys_result = _x0; \
} \
_sys_result; })
# define LOAD_ARGS_0() \
register long _x0 asm ("x0");
# define LOAD_ARGS_1(x0) \
long _x0tmp = (long) (x0); \
LOAD_ARGS_0 () \
_x0 = _x0tmp;
# define LOAD_ARGS_2(x0, x1) \
long _x1tmp = (long) (x1); \
LOAD_ARGS_1 (x0) \
register long _x1 asm ("x1") = _x1tmp;
# define LOAD_ARGS_3(x0, x1, x2) \
long _x2tmp = (long) (x2); \
LOAD_ARGS_2 (x0, x1) \
register long _x2 asm ("x2") = _x2tmp;
# define LOAD_ARGS_4(x0, x1, x2, x3) \
long _x3tmp = (long) (x3); \
LOAD_ARGS_3 (x0, x1, x2) \
register long _x3 asm ("x3") = _x3tmp;
# define LOAD_ARGS_5(x0, x1, x2, x3, x4) \
long _x4tmp = (long) (x4); \
LOAD_ARGS_4 (x0, x1, x2, x3) \
register long _x4 asm ("x4") = _x4tmp;
# define LOAD_ARGS_6(x0, x1, x2, x3, x4, x5) \
long _x5tmp = (long) (x5); \
LOAD_ARGS_5 (x0, x1, x2, x3, x4) \
register long _x5 asm ("x5") = _x5tmp;
# define LOAD_ARGS_7(x0, x1, x2, x3, x4, x5, x6)\
long _x6tmp = (long) (x6); \
LOAD_ARGS_6 (x0, x1, x2, x3, x4, x5) \
register long _x6 asm ("x6") = _x6tmp;
# define ASM_ARGS_0
# define ASM_ARGS_1 , "r" (_x0)
# define ASM_ARGS_2 ASM_ARGS_1, "r" (_x1)
# define ASM_ARGS_3 ASM_ARGS_2, "r" (_x2)
# define ASM_ARGS_4 ASM_ARGS_3, "r" (_x3)
# define ASM_ARGS_5 ASM_ARGS_4, "r" (_x4)
# define ASM_ARGS_6 ASM_ARGS_5, "r" (_x5)
# define ASM_ARGS_7 ASM_ARGS_6, "r" (_x6)
>From gcc-bugs-return-641417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 04:10:46 2019
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Subject: [Bug target/82920] cet test failures on darwin
Date: Sun, 21 Apr 2019 04:10:00 -0000
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Iain Sandoe <iains at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46208|0 |1
is obsolete| |
--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 46214
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46214&action=edit
Patch set
a) I found one case where I'd missed the necessary change (which means that
something isn't tested on Darwin at least :().
b) Split into
- code change to i386.c
- testsuite changes
- testsuite - target supports (no mx32 for Darwin)
- testsuite - target supports (make the CET support test more robust).
*** this still needs wider testing - I haven't even tried to build it on Linux,
so it's not ready to post.
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Subject: [Bug testsuite/81058] FAIL: gcc.target/i386/avx512bw-vpmovu?swb-1.c scan-assembler-times vpmovu?swb.*
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--- Comment #7 from Iain Sandoe <iains at gcc dot gnu.org> ---
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Revised patch
On Dominique's prompting, I had a look at alternatives to skipping these tests.
It turns out that we can fix the problem by avoiding the PIC indirections that
Darwin's ABI mandates for common accesses.
Modulo missing ChangeLog this would be the proposed patch.
>From gcc-bugs-return-641419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 07:04:08 2019
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Subject: [Bug d/89017] ICE in force_type_die, at dwarf2out.c:26061
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--- Comment #4 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Sun Apr 21 07:03:32 2019
New Revision: 270478
URL: https://gcc.gnu.org/viewcvs?rev=270478&root=gcc&view=rev
Log:
d: Use semanticRun to prevent declaration pass from running multiple times.
This shouldn't happen during normal traversal of the AST provided from
the front-end, however as there are some cases where declarations need
to be visited out of order, such as what is being done in PR d/89017, it
then becomes necessary to guard against this.
gcc/d/ChangeLog:
2019-04-21 Iain Buclaw <ibuclaw@gdcproject.org>
* decl.cc (DeclVisitor::visit(Import)): Set semanticRun after
completion, guard against being called more than once.
(DeclVisitor::visit(StructDeclaration)): Likewise.
(DeclVisitor::visit(ClassDeclaration)): Likewise.
(DeclVisitor::visit(InterfaceDeclaration)): Likewise.
(DeclVisitor::visit(VarDeclaration)): Likewise.
(DeclVisitor::visit(TypeInfoDeclaration)): Likewise.
Modified:
trunk/gcc/d/ChangeLog
trunk/gcc/d/decl.cc
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Subject: [Bug c++/89900] [9 Regression] ICE: Segmentation fault (in check_instantiated_arg)
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.
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Subject: [Bug d/90064] InSituRegion lacks SPARC64 support
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--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Sun Apr 21 10:21:07 2019
New Revision: 270483
URL: https://gcc.gnu.org/viewcvs?rev=270483&root=gcc&view=rev
Log:
PR d/90064
libphobos: Merge upstream phobos 428460ddd
Defines growDownwards on SPARC64, initial patch by Rainer Orth.
Backports another fix to std.process, allowing permissions tests to be
skipped when running as root.
Reviewed-on: https://github.com/dlang/phobos/pull/6962
Modified:
trunk/libphobos/src/MERGE
trunk/libphobos/src/std/experimental/allocator/building_blocks/region.d
trunk/libphobos/src/std/process.d
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Merged in r270483.
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Subject: [Bug c++/90172] [9 Regression] ICE: Segmentation fault (in contains_struct_check)
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-21
CC| |paolo.carlini at oracle dot com
Ever confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I think this is also a rejects-valid.
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
Date: Sun, 21 Apr 2019 10:48:00 -0000
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--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> ---
The Component field is wrong, right?
>From gcc-bugs-return-641425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 11:16:54 2019
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/88238] libphobos compile problems on Solaris 10
Date: Sun, 21 Apr 2019 11:16:00 -0000
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--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Rainer Orth from comment #0)
>
> which allow libgdruntime.so and libgphobos.so to link on Solaris 11.3 without
> unresolved symbols, there are more on Solaris 10:
>
> *
> symbol not found: backtrace (libdruntime/.libs/libgdruntime.so)
> symbol not found: backtrace_symbols_fd (libdruntime/.libs/libgdruntime.so)
> symbol not found: backtrace_symbols (libdruntime/.libs/libgdruntime.so)
>
> Unlike Solaris 11, Solaris 10 lacks the backtrace functions in libc. When
> trying to use them, this failed because backtrace-supported.h wasn't found
> during configure. This is due to an error in m4/druntime/libraries.m4
> which
> tries to add to CPPFLAGS with +=, which of course the shell doesn't
> understand.
>
Just saw this, I noticed this also when building on one of the BSDs, fixed in
r270377.
> *
>
> symbol not found: dl_iterate_phdr (libdruntime/.libs/libgdruntime.so)
>
> Unlike Solaris 11, dl_iterate_phdr support was only backported to a late
> Solaris 10 update and even so only lives in libdl, not in libc. Not yet
> fixed.
>
So does dlopen and dl_iterate_phdr live in separate libraries? I would have
thought that DRUNTIME_LIBRARIES_DLOPEN would correctly add -ldl to the driver
spec file.
> *
>
> symbol not found: getprogname (libdruntime/.libs/libgdruntime.so)
>
> Solaris 10 lacks getprogname or equivalent; for now I'm faking this by just
> returning "a.out".
>
There's the following function in rt/dmain2.d
extern (C) string[] rt_args();
Would the basename() of argv[0] be a suitable fallback? Looking at illumos,
they use dlinfo(RTLD_SELF, RTLD_DI_ARGSINFO) and strrchr(argv0, '/').
> *
> symbol not found: posix_memalign
> (src/.libs/libgphobos.so)
>
> Also missing from Solaris 10. I've not yet checked what to do here. One
> might be able to use pagealign_alloc from gnulib instead?
If the OS version can be obtained from the compiler, same as FBSD_MAJOR, then
one option would be to provide posix_memalign internally in druntime.
extern(D) int posix_memalign(void** ptr, size_t alignment, size_t size)
{
// ...
}
extern(D) so that it won't conflict with extern(C) function of the same name.
Though whether it is worth the effort, I'm not so sure. As you've said that
Solaris10 will be removed before.
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Subject: [Bug libstdc++/83029] Memory leaks due to leaked thread local variable
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Which version of glibc are you using?
>From gcc-bugs-return-641428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 14:55:37 2019
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Subject: [Bug c++/90196] std:: types unused without warnings but simple type not affected
Date: Sun, 21 Apr 2019 14:55:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The warning works as intended. Types with a non-trivial destructor do not cause
a warning, because if the destructor has side effects then the variable is not
unused. We don't want to warn for types like std::lock_guard which are
constructed and then not "used", because the destructor does all the useful
work.
>From gcc-bugs-return-641429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 15:15:36 2019
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Subject: [Bug c++/90196] std:: types unused without warnings but simple type not affected
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--- Comment #3 from МакÑим Прохоренко <maxim.prohorenko at gmail dot com> ---
Allocate GiB of unused memory and don't warn about it? But 1 simple double - it
is a big problem.
For std:: objects with side effect - OK!
But for simple unused vector or set or map???
>From gcc-bugs-return-641430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 15:48:47 2019
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/90197] New: [8/9 Regression] Cannot step through simple loop at -O -g
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Bug ID: 90197
Summary: [8/9 Regression] Cannot step through simple loop at -O
-g
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Compiling:
__attribute__((noipa))
void
test (unsigned int *dst, unsigned int base, int count)
{
for (int i = 0; i < count; ++i, base += 15)
dst[i] = base;
}
int
main (void)
{
unsigned int dst[100];
test (dst, 0x4000, 100);
}
with -O -g and launching with recent gdb trunk (and stock gdb):
(gdb) break test
Breakpoint 1 ...
(gdb) run
Starting program: ...
Breakpoint 1, test ...
5 for (int i = 0; i < count; ++i, base += 15)
(gdb) next
6 dst[i] = base;
(gdb) next
__libc_start_main (main=...
i.e. it isn't possible to step through each iteration of the loop. With gcc 7
this worked even for -O2 -g.
The test works with -O -fno-tree-ch -g (and thus also with -Og). For -O2
-fno-tree-ch -g we get:
(gdb) break test
Breakpoint 1 ...
(gdb) run
Starting program: ...
Breakpoint 1, test ...
5 for (int i = 0; i < count; ++i, base += 15)
(gdb) next
__libc_start_main ...
With just -O2 -g we get the same as for -O -g.
A breakpoint on the loop body (line 6) hits for each iteration of the loop
though.
As you can tell, this isn't my area, so I'm not sure whether it's actually a
gdb bug (or a dup).
>From gcc-bugs-return-641431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 16:34:46 2019
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Subject: [Bug d/88431] link errors on build
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--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to David Binderman from comment #1)
> This config line works fine:
>
> ../trunk/configure --prefix=/home/dcb/gcc/results.266950 \
> --disable-multilib \
> --disable-werror \
> --enable-checking=df,extra,fold,rtl,yes \
> --enable-languages=d
>
> so it looks like using -O3 in the top level Makefile causes trouble.
I see the following in the config.cache for libphobos:
lt_cv_prog_compiler_pic_works=${lt_cv_prog_compiler_pic_works=yes}
lt_cv_prog_compiler_pic_works_D=${lt_cv_prog_compiler_pic_works_D=no}
config.log:
configure:12414: checking if ./gcc/gdc -B./gcc/ PIC flag -fPIC works
configure:12432: ./gcc/gdc -B./gcc/ -c -nophoboslib -fno-moduleinfo -nostdinc
-g -O3 -march=native -Wlogical-op -fPIC conftest.d >&5
d21: warning: command line option '-Wlogical-op' is valid for C/C++/ObjC/ObjC++
but not for D
configure:12436: $? = 0
configure:12449: result: no
It looks like -Wlogical-op is the culprit, not -O3.
This is the condition in configure:
---
if (exit $ac_status) && test -s "$ac_outfile"; then
# The compiler can only warn and ignore the option if not recognized
# So say no if there are warnings other than the usual output.
$ECHO "$_lt_compiler_boilerplate" | $SED '/^$/d' >conftest.exp
$SED '/^$/d; /^ *+/d' conftest.err >conftest.er2
if test ! -s conftest.er2 || diff conftest.exp conftest.er2 >/dev/null; then
lt_cv_prog_compiler_pic_works_D=yes
fi
fi
>From gcc-bugs-return-641433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 16:53:21 2019
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Subject: [Bug c++/55203] No unused warning for variables of non-trivial types
Date: Sun, 21 Apr 2019 16:53:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |maxim.prohorenko at gmail dot com
--- Comment #21 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 90196 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-641432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 16:53:20 2019
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Subject: [Bug c++/90196] std:: types unused without warnings but simple type not affected
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 55203.
*** This bug has been marked as a duplicate of bug 55203 ***
>From gcc-bugs-return-641434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 17:03:47 2019
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From: "ppluzhnikov at google dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/83029] Memory leaks due to leaked thread local variable
Date: Sun, 21 Apr 2019 17:03:00 -0000
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--- Comment #5 from Paul Pluzhnikov <ppluzhnikov at google dot com> ---
(In reply to Jonathan Wakely from comment #4)
> Which version of glibc are you using?
"Debian GLIBC 2.24-12".
I believe this bug should be closed as fixed or invalid:
1. The original test case does not fail on this system, and produces expected
matching constructors / destructors:
Constructing printer.
Constructing printer.
Printing something...
Destroying printer...
Printing something...
Destroying printer...
2. The test case from #c2 is quite different (because thread_local is in
function scope rather than the global scope), and is actually a (hard to spot)
bug in the test case.
Analysis by richardsmith@google.com: "The program references a function-static
local variable without ever having executed its initializer."
(This happens because function-local thread_local variables are initialized
when they are reached, just like function-local static variables, and that
never happens in the test case from #c2)
>From gcc-bugs-return-641435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 17:20:53 2019
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Subject: [Bug d/88431] link errors on build
Date: Sun, 21 Apr 2019 17:20:00 -0000
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--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Added some debug prints in the boilerplate check.
configure:12017: Checking compiler boilerplate from: $CC -o conftest$ac_exeext
$CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5
configure:12018: module mod; extern(C) int main() { return 0; }
configure:12019: Boilerplate = d21: warning: command line option '-Wlogical-op'
is valid for C/C++/ObjC/ObjC++ but not for D
d21: error: cannot find source code for runtime library file 'object.d'
d21: note: dmd might not be correctly installed. Run 'dmd -man' for
installation instructions.
d21: note: config file: not found
import path[0] = /usr/include/d
So the D boilerplate in the initial test does not match the warnings in latter
tests.
This is the problem here.
>From gcc-bugs-return-641436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 17:34:13 2019
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Subject: [Bug c++/90196] std:: types unused without warnings but simple type not affected
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--- Comment #5 from МакÑим Прохоренко <maxim.prohorenko at gmail dot com> ---
using namespace std;
class __attribute__((warn_unused)) kw
{
public:
bitset<12> flags{"000000000010"};
};
int main() {
printf("Hello World!\n");
kw KW;
puts(to_string(sizeof(kw)).c_str());
return 0;
}
Mark all my class by __attribute__((warn_unused)) and all my colleagues was
hate me.
>From gcc-bugs-return-641437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 18:10:10 2019
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Subject: [Bug target/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
Date: Sun, 21 Apr 2019 18:23:00 -0000
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--- Comment #8 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Sun Apr 21 18:23:00 2019
New Revision: 270484
URL: https://gcc.gnu.org/viewcvs?rev=270484&root=gcc&view=rev
Log:
LRA: Revert "Remove useless move insns"
Useless move insn removal was added to LRA just to avoid wasting CPU
cycles on such insn processing afterwards. Such insns are removed
anyway later in the pass pipeline. The CPU time savings are tiny but
the removal creates too many problems including PR target/90178.
Vladimir pre-approved the patch to remove the code:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00834.html
gcc/
PR target/90178
Revert:
2018-11-21 Uros Bizjak <ubizjak@gmail.com>
Revert the revert:
2013-10-26 Vladimir Makarov <vmakarov@redhat.com>
Revert:
2013-10-25 Vladimir Makarov <vmakarov@redhat.com>
* lra-spills.c (lra_final_code_change): Remove useless move insns.
gcc/testsuite/
PR target/90178
* gcc.target/i386/pr90178.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr90178.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra-spills.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/90178] [9 Regression] Missed optimization: duplicated terminal basic block with -mavx
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed.
>From gcc-bugs-return-641440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 20:02:46 2019
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Subject: [Bug fortran/83118] [7/8/9 Regression] Bad intrinsic assignment of class(*) array component of derived type
Date: Sun, 21 Apr 2019 20:02:00 -0000
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--- Comment #17 from Paul Thomas <pault at gcc dot gnu.org> ---
Created attachment 46216
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46216&action=edit
Patch for the remaining problems.
I am registering this now as a measure of progress towards doing a proper job
of fixing this PR for good.
The part in trans-expr.c(gfc_trans_assignment_1) is obligatory and stops the
compiler doubling up mallocs on top of one another.
The part in trans-array.c(gfc_alloc_allocatable_for_assignment) is a partial
solution. Instead of testing the shape of the lhs against that of that of the
rhs, we need to be comparing the size in bytes. The attached lets the system do
this by relying on realloc to do the job. This might be the most efficient way
to do it - I will look into it. I note in passing that the estimate of the size
of the rhs is going to fail, where class entities are a dynamic type other than
the declared type. This is easily done and requires perspiration rather than
inspiration :-)
Paul
>From gcc-bugs-return-641441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 21 20:26:48 2019
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Subject: [Bug d/90130] gdc.test/runnable/test12.d FAILs
Date: Sun, 21 Apr 2019 20:26:00 -0000
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--- Comment #2 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Sun Apr 21 20:26:12 2019
New Revision: 270485
URL: https://gcc.gnu.org/viewcvs?rev=270485&root=gcc&view=rev
Log:
PR d/90130
d/dmd: Merge upstream dmd 065fbd452
Fixes endian bug in CTFE, and corrects tests in the D2 testsuite that
failed on big endian targets.
Initial patch by Robin Dapp.
Reviewed-on: https://github.com/dlang/dmd/pull/9665
Modified:
trunk/gcc/d/dmd/MERGE
trunk/gcc/d/dmd/constfold.c
trunk/gcc/testsuite/gdc.test/runnable/mars1.d
trunk/gcc/testsuite/gdc.test/runnable/test12.d
trunk/gcc/testsuite/gdc.test/runnable/test23.d
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Subject: [Bug fortran/90198] New: internal compiler error: in convert_move, at expr.c:229
Date: Mon, 22 Apr 2019 00:41:00 -0000
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Bug ID: 90198
Summary: internal compiler error: in convert_move, at
expr.c:229
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Hello gcc users,
While trying to compile a fortran code, I obtained the following error:
flash_err.f90:31:0:
l_t_field=rho_0*heat_function_field*(1E7*1.184E5/(temp+1000)**2*exp(-1.184E5/(temp+1000))+1.4E-2*(0.5*temp**(-0.5)*exp(-92/temp)+sqrt(temp)*92/temp**2*exp(-92/temp)))/sim_m_proton
internal compiler error: in convert_move, at expr.c:229
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
I compiled it the following way:
gfortran -ffree-line-length-none flash_err.f90 -o flash.exe
Here you have some compiler information:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.3.0-27ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04)
I tried to compile the same code using gcc version 4.4.7 20120313 (Red Hat
4.4.7-11) (GCC) and I got the same error.
The code I used is:
program test
implicit none
real:: sim_temp,sim_num_dens,sim_k,sim_cond,sim_box_size,sim_pi
real::sim_m_proton,sim_gamma,sim_mu_mol,sim_gasconstant,sim_boltzmann
real,dimension(4) :: coeff
sim_m_proton=1.6726219E-24
sim_gamma=1.66666666
sim_mu_mol=1.27
sim_gasconstant=8.3144598E-7
sim_boltzmann=1.38064852E-16
sim_pi=3.14159265
sim_temp=729.5
sim_num_dens=3.0
sim_box_size=10*3.085678E18
sim_k=2*sim_pi/sim_box_size
sim_cond=67524.2086
call coeficients(sim_temp,sim_num_dens,sim_k,sim_cond,coeff)
contains
!!!!!!!!!!!!!!!!!! Initial velocity functions !!!!!!!!!!!!!!!!!!!!!
real function cool_function_field(temp)
real, intent(in) :: temp
cool_function_field=heat_function_field()*(1.0E7*exp(-1.184E5/(temp+1000))+1.4*1e-2*sqrt(temp)*exp(-92/temp))/sim_m_proton
end function cool_function_field
real function l_t_field(temp,nh)
real,intent(in):: temp,nh
real :: rho_0
rho_0=sim_m_proton*nh
l_t_field=rho_0*heat_function_field*(1E7*1.184E5/(temp+1000)**2*exp(-1.184E5/(temp+1000))+1.4E-2*(0.5*temp**(-0.5)*exp(-92/temp)+sqrt(temp)*92/temp**2*exp(-92/temp)))/sim_m_proton
end function l_t_field
real function heat_function_field()
heat_function_field=2.0E-26/sim_m_proton
end function heat_function_field
real function sound_speed(temp)
real,intent(in):: temp
sound_speed=sqrt(sim_gamma*sim_boltzmann*temp/(sim_mu_mol*sim_m_proton))
end function sound_speed
real function kappa_rho(temp,nh)
real,intent(in):: temp,nh
real:: rho_0
rho_0=sim_m_proton*nh
kappa_rho=sim_mu_mol*rho_0*cool_function_field(temp)/(sim_gasConstant*sound_speed(temp)*temp)
end function kappa_rho
real function kappa_t(temp,nh)
real,intent(in):: temp,nh
kappa_t=sim_mu_mol*(sim_gamma-1)*l_t_field(temp,nh)/(sim_gasConstant*sound_speed(temp))
end function kappa_t
real function kappa_k(temp,nh,cond)
real,intent(in):: temp,nh,cond
real :: rho_0
rho_0=sim_m_proton*nh
kappa_k=sim_gasConstant*sound_speed(temp)*rho_0/(sim_mu_mol*(sim_gamma-1)*cond)
end function kappa_k
real function omega(cond,temp,nh,w,k)
real, intent(in) :: cond,temp,nh,w,k
omega=w**3+w**2*sound_speed(temp)*kappa_t(temp,nh)+k**2/kappa_k(temp,nh,cond)+w*sound_speed(temp)**2*k**2+sound_speed(temp)**3.0*k**2/sim_gamma*(kappa_t(temp,nh)-kappa_rho(temp,nh)+k**2/kappa_k(temp,nh,cond))
end function omega
!!!! solver !!!
SUBROUTINE laguer(a,m,x,its)
INTEGER m,its,MAXIT,MR,MT
REAL EPSS
COMPLEX a(m+1),x
PARAMETER (EPSS=2.e-7,MR=8,MT=10,MAXIT=MT*MR)
INTEGER iter,j
REAL abx,abp,abm,err,frac(MR)
COMPLEX dx,x1,b,d,f,g,h,sq,gp,gm,g2
SAVE frac
DATA frac /.5,.25,.75,.13,.38,.62,.88,1./
do 12 iter=1,MAXIT
its=iter
b=a(m+1)
err=abs(b)
d=cmplx(0.,0.)
f=cmplx(0.,0.)
abx=abs(x)
do 11 j=m,1,-1
f=x*f+d
d=x*d+b
b=x*b+a(j)
err=abs(b)+abx*err
11 continue
err=EPSS*err
if(abs(b).le.err) then
return
else
g=d/b
g2=g*g
h=g2-2.*f/b
sq=sqrt((m-1)*(m*h-g2))
gp=g+sq
gm=g-sq
abp=abs(gp)
abm=abs(gm)
if(abp.lt.abm) gp=gm
if (max(abp,abm).gt.0.) then
dx=m/gp
else
dx=exp(cmplx(log(1.+abx),float(iter)))
endif
endif
x1=x-dx
if(x.eq.x1)return
if (mod(iter,MT).ne.0) then
x=x1
else
x=x-dx*frac(iter/MT)
endif
12 continue
return
END
subroutine coeficients(temp,nh,k,cond,coef)
real, intent(in):: temp,nh,cond,k
real, intent(out),dimension(4):: coef
coef(1)=1
coef(2)=sound_speed(temp)*kappa_t(temp,nh)
coef(3)=sound_speed(temp)**2*k**2
coef(4)=k**2/kappa_k(temp,nh,cond)+sound_speed(temp)**3.0*k**2/sim_gamma*(kappa_t(temp,nh)-kappa_rho(temp,nh)+k**2/kappa_k(temp,nh,cond))
end subroutine coeficients
end program
I hope you can help to find out what is wrong in my code and to solve this
issue.
Cheers,
Guido
>From gcc-bugs-return-641443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 02:54:29 2019
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Subject: [Bug c++/90199] New: ICE: tree check: expected complex_cst, have plus_expr in output_constant, at varasm.c:4994
Date: Mon, 22 Apr 2019 02:54:00 -0000
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Bug ID: 90199
Summary: ICE: tree check: expected complex_cst, have plus_expr
in output_constant, at varasm.c:4994
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g++-9.0.0-alpha20190414 snapshot (r270355), 8.3, 7.4, 6.3 all ICE when
compiling the following testcase w/ -frounding-math:
template <typename>
class complex;
template <typename D7> constexpr complex<D7>
operator+ (complex<D7> hd, complex<D7> qc)
{
hd += qc;
return hd;
}
template <>
class complex<float> {
public:
constexpr complex
operator+= (complex rm)
{
jp += rm.jp;
return *this;
}
_Complex float jp;
};
constexpr complex<float> fl{3.3}, ka{1.1}, r0 = fl + ka;
% g++-9.0.0-alpha20190414 -frounding-math -c cvzjr7ol.cc
cvzjr7ol.cc:24:56: internal compiler error: tree check: expected complex_cst,
have plus_expr in output_constant, at varasm.c:4994
24 | constexpr complex<float> fl{3.3}, ka{1.1}, r0 = fl + ka;
| ^
0x7b55c1 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/tree.c:9881
0x7cce74 tree_check(tree_node*, char const*, int, char const*, tree_code)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/tree.h:3176
0x7cce74 output_constant
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varasm.c:4994
0x126c2bf output_constant
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varasm.c:5246
0x126c2bf output_constructor_regular_field
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varasm.c:5246
0x126c2bf output_constructor
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varasm.c:5513
0x126d034 output_constant
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varasm.c:4885
0x126d034 assemble_variable_contents
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varasm.c:2144
0x1275ad4 assemble_variable(tree_node*, int, int, int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varasm.c:2323
0x1278449 varpool_node::assemble_decl()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/varpool.c:584
0xb6b69c output_in_order
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cgraphunit.c:2446
0xb6b69c symbol_table::compile()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cgraphunit.c:2686
0xb6ddfc symbol_table::compile()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cgraphunit.c:2599
0xb6ddfc symbol_table::finalize_compilation_unit()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/cgraphunit.c:2865
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Subject: [Bug tree-optimization/90200] New: [graphite] ICE: Segmentation fault (in apply_schedule_on_deps)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90200
Bug ID: 90200
Summary: [graphite] ICE: Segmentation fault (in
apply_schedule_on_deps)
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Reporter: asolokha at gmx dot com
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Target: powerpc-*-linux-gnu
Created attachment 46217
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46217&action=edit
The original testcase
gfortran-9.0.0-alpha20190414 snapshot (r270355) ICEs when compiling silup.f
from the MATH77 package[1] w/ -Ofast -floop-parallelize-all -fstack-reuse=none
-fwrapv -fno-code-hoisting -fno-tree-ccp -fno-tree-vrp
-fno-unsafe-math-optimizations:
% powerpc-e300c3-linux-gnu-gfortran-9.0.0-alpha20190414 -Ofast
-floop-parallelize-all -fstack-reuse=none -fwrapv -fno-code-hoisting
-fno-tree-ccp -fno-tree-vrp -fno-unsafe-math-optimizations -w -c silup.f
during GIMPLE pass: graphite
silup.f:1:0:
1 | subroutine SILUP (X, Y, NTAB, XT, YT, NDEG, LUP, IOPT, EOPT)
|
internal compiler error: Segmentation fault
0xd84526 crash_signal
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/toplev.c:326
0x14ba10d apply_schedule_on_deps
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite-dependences.c:207
0x14ba10d carries_deps(isl_union_map*, isl_union_map*, int)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite-dependences.c:229
0x14b5b7a ast_build_before_for(isl_ast_build*, void*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite-isl-ast-to-gimple.c:1372
0x14b6f3b translate_isl_ast_to_gimple::scop_to_isl_ast(scop*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite-isl-ast-to-gimple.c:1407
0x14b9547 graphite_regenerate_ast_isl(scop*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite-isl-ast-to-gimple.c:1480
0x14b4da4 graphite_transform_loops()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite.c:472
0x14b5340 graphite_transforms
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite.c:538
0x14b5340 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190414/work/gcc-9-20190414/gcc/graphite.c:615
Unfortunately I failed to minimize the testcase in any meaningful way.
I have isl 0.21 installed on this machine.
[1] http://netlib.org/math/index.html
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asm file generated by gcc
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Subject: [Bug fortran/90198] internal compiler error: in convert_move, at expr.c:229
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #1 from kargl at gcc dot gnu.org ---
(In reply to guido from comment #0)
> Hello gcc users,
> While trying to compile a fortran code, I obtained the following error:
>
> flash_err.f90:31:0:
>
>
> l_t_field=rho_0*heat_function_field*(1E7*1.184E5/(temp+1000)**2*exp(-1.184E5/
> (temp+1000))+1.4E-2*(0.5*temp**(-0.5)*exp(-92/temp)+sqrt(temp)*92/
> temp**2*exp(-92/temp)))/sim_m_proton
While gfortran should not ICE, it would help if you considered
writing better structure code. In the above line of code,
what does "rho_0 * heat_function_field * (1E7 *..." do?
>From gcc-bugs-return-641448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 05:02:12 2019
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Subject: [Bug target/38182] stddef.h assumes machinee/ansi.h defines _ANSI_H_
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #21 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to joseph@codesourcery.com from comment #20)
> r261797 removed all references to _ANSI_H_ from stddef.h, so this issue
> can't be relevant after then.
...so that sounds like it can be closed, then.
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Subject: [Bug fortran/90198] internal compiler error: in convert_move, at expr.c:229
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--- Comment #2 from kargl at gcc dot gnu.org ---
Reduced testcase.
program test
implicit none
contains
real function foo(temp)
real, intent(in) :: temp
foo=bah()*(2)
end function foo
real function bar(temp,nh)
real,intent(in):: temp,nh
bar = 2 * bah ! Danger Will Roberson!
end function bar
real function bah()
bah = 1
end function bah
end program
The problem is that bah is referenced in bar() as a variable. Later,
we find that bah is defined as a function. gfortran chokes on this.
Note, if the function bah() were moved in front of the function
bar(), then gfortran generates
a.f90:18:36:
18 | bar = 2 * bah ! Danger Will Roberson!
| 1
Error: Function 'bah' requires an argument list at (1)
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Subject: [Bug c++/18635] [DR 504] use of uninitialised reference accepted (without -Wuninitialized) in C++ front end
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|accepts-invalid |diagnostic
Blocks| |24639
Summary|[DR 504] use of |[DR 504] use of
|uninitialised reference |uninitialised reference
|accepted in C++ front end |accepted (without
| |-Wuninitialized) in C++
| |front end
Severity|normal |enhancement
--- Comment #17 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #16)
> This is
> http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3293.html#504 which
> is Open, so I'm suspending this. If/when that gets resolved we can revisit
> this PR.
>
> I think SUSPENDED rather than INVALID is being generous, as G++ is
> completely correct to accept the code, and follows the committee's
> intentions:
> "Implementations can warn about such constructs, and the resolution for
> issue 453 makes executing such code undefined behavior; that seemed to
> address the situation adequately."
Changing from an accepts-invalid to an enhancement request for an optional
-Wuninitialized diagnostic then
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24639
[Bug 24639] [meta-bug] bug to track all Wuninitialized issues
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Subject: [Bug fortran/90198] internal compiler error: in convert_move, at expr.c:229
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--- Comment #3 from guido <g.granda at irya dot unam.mx> ---
Hello Kargl,
Thank you a lot! The problem was that I was calling the
heat_function_field incorrectly. I forgot to put the "()" and the error
message wasn't that helpful. Therefore this is not a bug at all.
Cheers,
On 2019-04-22 00:04, kargl at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90198
>
> --- Comment #2 from kargl at gcc dot gnu.org ---
> Reduced testcase.
>
> program test
>
> implicit none
>
> contains
>
> real function foo(temp)
> real, intent(in) :: temp
> foo=bah()*(2)
> end function foo
>
> real function bar(temp,nh)
> real,intent(in):: temp,nh
> bar = 2 * bah ! Danger Will Roberson!
> end function bar
>
> real function bah()
> bah = 1
> end function bah
>
> end program
>
> The problem is that bah is referenced in bar() as a variable. Later,
> we find that bah is defined as a function. gfortran chokes on this.
>
> Note, if the function bah() were moved in front of the function
> bar(), then gfortran generates
>
> a.f90:18:36:
>
> 18 | bar = 2 * bah ! Danger Will Roberson!
> | 1
> Error: Function 'bah' requires an argument list at (1)
>From gcc-bugs-return-641452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 06:51:09 2019
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Subject: [Bug fortran/57284] [OOP] ICE with find_array_spec for polymorphic arrays
Date: Mon, 22 Apr 2019 06:51:00 -0000
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--- Comment #9 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Mon Apr 22 06:50:33 2019
New Revision: 270489
URL: https://gcc.gnu.org/viewcvs?rev=270489&root=gcc&view=rev
Log:
2019-04-22 Paul Thomas <pault@gcc.gnu.org>
PR fortran/57284
* resolve.c (find_array_spec): If this is a class expression
and the symbol and component array specs are the same, this is
not an error.
*trans-intrinsic.c (gfc_conv_intrinsic_size): If a class symbol
argument, has no namespace, it has come from the interface
mapping and the _data component must be accessed directly.
2019-04-22 Paul Thomas <pault@gcc.gnu.org>
PR fortran/57284
* gfortran.dg/class_70.f03
Added:
trunk/gcc/testsuite/gfortran.dg/class_70.f03
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/testsuite/ChangeLog
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From: "prokofjev.d at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90201] New: -Werror=useless-cast in move constructir
Date: Mon, 22 Apr 2019 08:22:00 -0000
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Bug ID: 90201
Summary: -Werror=useless-cast in move constructir
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Compiler options:
$ gcc kill_me.cpp -Wall -Wextra -std=c++17 "-Werror=useless-cast"
Code:
class foo
{
void bar(foo&& f)
{
foo(static_cast<foo&&>(f));
//foo(std::move(f));
}
};
int main()
{
}
Error:
with static_cast:
kill_me.cpp:5:30: error: useless cast to type ‘foo’ [-Werror=useless-cast]
foo(static_cast<foo&&>(f));
with std::move:
kill_me.cpp:7:21: error: useless cast to type ‘foo’ [-Werror=useless-cast]
foo(std::move(f));
^
>From gcc-bugs-return-641455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 08:49:55 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46205|0 |1
is obsolete| |
--- Comment #77 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46220
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46220&action=edit
gcc9-pr89093.patch
The above patch passed bootstrap, but there is a regression:
+FAIL: compiler driver --help=target option(s): "^ +-.*[^:.]\$" absent from
output: " -mgeneral-regs-only Generate code which uses the cor
e registers only(r0-r14)"
because there is no full stop at the end of description. Fixed in this patch
(I've also added a space before (.
I've also seen
+FAIL: TestAbort
+FAIL: TestBreakpoint
+FAIL: TestCgoCrashHandler
+FAIL: TestCgoSignalDeadlock
+FAIL: TestSelectStackAdjust
regressions, but 1) not sure if they are reproducible or not, go has usually
lots of random intermitent failures 2) even if yes, the libgo part of the patch
I believe can't be committed together with the rest, as libgo has a different
upstream and will need to guard it on being compiled with gcc 9+, because it
can be built with other compilers too.
>From gcc-bugs-return-641456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 09:14:05 2019
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Subject: [Bug ada/89556] error when using "with Priority"
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simon at pushface dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #1 from simon at pushface dot org ---
Ignoring the GPR file (which references nonexistent directories) and
just compiling the source files, GNAT CE 2018 does indeed result in
this ICE.
However gcc version 9.0.1 20190323 (experimental) (GCC) does NOT.
>From gcc-bugs-return-641457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 09:19:58 2019
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From: "akim.demaille at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/90034] gcc hangs on wait4 after vfork after opening tmp file
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Akim Demaille <akim.demaille at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |akim.demaille at gmail dot com
--- Comment #8 from Akim Demaille <akim.demaille at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> That said, bison should be fixed to not emit this kind of line directives...
Hi Richard,
I maintain Bison.
Bison is emitting two types of #lines: right before emitting code coming
from the input file, something like (1)
#line "parse.y" 42
and once we are done with the input, and back to generated code, something
like (2)
#line "parse.tab.c" 1024
What is special here is the way Bison and GCC were invoked:
bison -o /dev/stdout parser.y | gcc -xc -
So "of course", because the output file is /dev/stdout, we emit
this for (2)
#line "/dev/stdout" 1024
and if someone were to call bison with
bison -o /dev/stdout /dev/stdin
no doubt that (1) will become
#line "/dev/stdin" 42
Back your comment:
> That said, bison should be fixed to not emit this kind of line directives...
Well, I don't think we should decide whether or not to emit the
#lines based on how magic the input files, but if the consensus
here differs, I will change that. I personally do not understand
the point of not generating the output file and sending the output
directly to stdout. Especially in the case of Bison which also
might generate other files based on the base name of the output file
(/dev/stdout.h, /dev/stdout.output, etc.).
If you do think we should detect special input and output files
and not emit #line in their case, what kind of check would you
recommend?
That being said, since we also have caret-diagnostics, and we also support
#line in the input, we also have to get robust to users/generators
putting special file names in the #lines inside parser.y...
Cheers!
>From gcc-bugs-return-641458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 09:26:56 2019
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/90051] Error in spec comments - g-caliio.ads (%Z)
Date: Mon, 22 Apr 2019 09:26:00 -0000
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simon at pushface dot org changed:
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----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #1 from simon at pushface dot org ---
That would be g-catiio.
Still no %Z in gcc version 9.0.1 20190323 (experimental) (GCC); %Z results in
GNAT.CALENDAR.TIME_IO.PICTURE_ERROR.
>From gcc-bugs-return-641459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 09:53:13 2019
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Subject: [Bug target/90202] New: AVX-512 instructions not used
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90202
Bug ID: 90202
Summary: AVX-512 instructions not used
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
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Consider the following test program:
struct v {
int val[16];
};
v test(v a, v b) {
v res;
for (int i = 0; i < 16; i++)
res.val[i] = a.val[i] + b.val[i];
return res;
}
When compiled with `g++ -O3 -march=skylake-avx512` the following assembly is
produced:
test(v, v):
push rbp
mov rax, rdi
mov rbp, rsp
vmovdqu32 ymm1, YMMWORD PTR [rbp+16]
vmovdqu32 ymm2, YMMWORD PTR [rbp+48]
vpaddd ymm0, ymm1, YMMWORD PTR [rbp+80]
vmovdqu32 YMMWORD PTR [rdi], ymm0
vpaddd ymm0, ymm2, YMMWORD PTR [rbp+112]
vmovdqu32 YMMWORD PTR [rdi+32], ymm0
vzeroupper
pop rbp
ret
it seems suboptimal, as the 512 registers are available and a better assembly
is possible:
test(v, v):
vmovdqu32 zmm0, zmmword ptr [rsp + 72]
vpaddd zmm0, zmm0, zmmword ptr [rsp + 8]
vmovdqu32 zmmword ptr [rdi], zmm0
mov rax, rdi
vzeroupper
ret
>From gcc-bugs-return-641460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 09:57:51 2019
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From: "shreyans.doshi94 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90203] New: Can't compare "const std::pair<int, int>" with "std::pair<const int, int>"
Date: Mon, 22 Apr 2019 09:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90203
Bug ID: 90203
Summary: Can't compare "const std::pair<int, int>" with
"std::pair<const int, int>"
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: shreyans.doshi94 at gmail dot com
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Created attachment 46221
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46221&action=edit
Complete error message
The following code works fine:
#include <algorithm>
#include <map>
#include <iostream>
using namespace std;
int main()
{
map<int, int> a = {{1, 2}, {3, 4}};
pair<const int, int> x = {1, 2};
cout << count(a.begin(), a.end(), x); // Outputs 1
return 0;
}
But when I do the same thing inside count function using make_pair, it doesn't
work:
#include <algorithm>
#include <map>
#include <iostream>
using namespace std;
int main()
{
map<int, int> a = {{1, 2}, {3, 4}};
cout << count(a.begin(), a.end(), make_pair<const int, int>(1, 2)); //
Compilation error
return 0;
}
Exact error message:
/usr/include/c++/7/bits/predefined_ops.h:241:17: error: no match for
‘operator==’ (operand types are ‘std::pair<const int, int>’ and ‘const
std::pair<int, int>’)
{ return *__it == _M_value; }
~~~~~~^~~~~~~~~~~
I've attached complete error message in a file with Description "Complete error
message" for reference. But I believe the issues is easy to reproduce on local
machine as well
Surprisingly, const pair<int, int> and pair<const int, int> are not comparable,
which it should be in such cases. Ideally, if a container is const, it should
imply that all the underlying members are also const.
To play around a little bit, I also tried to keep the type of x in the first
snippet to be "pair<const int, const int>" and it starts giving similar error
that it can't compare "pair<const int, int>" with "pair<const int, const int>".
Although this should have worked, but logically thinking, the case above where
the whole pair is const should be more likely to work in my opinion.
Although the error message I've given is from gcc7, I've tried the same thing
on gcc8.3, clang8 and even MSVC19.20 to see if any other compiler has the same
issue and it turns out that all of them are giving me same error.
Compilation flag: -g3 -std=c++17 -O3
I've also tried adding "-Wall -Werror -Wpedantic" and it gives me same error.
I'll be happy to give any more info if required by anyone.
>From gcc-bugs-return-641461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 09:59:46 2019
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From: "antoshkka at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90204] New: [8 Regression] C code is optimized worse than C++
Date: Mon, 22 Apr 2019 09:59:00 -0000
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Bug ID: 90204
Summary: [8 Regression] C code is optimized worse than C++
Product: gcc
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Consider the example:
struct v {
int val[16];
};
struct v test(struct v a, struct v b) {
struct v res;
for (int i = 0; i < 16; i++)
res.val[i] = a.val[i] + b.val[i];
return res;
}
Compiling that snippet with `g++ -O3 -march=skylake-avx512` gives a short
assembly:
test(v, v):
push rbp
mov rax, rdi
mov rbp, rsp
vmovdqu32 ymm1, YMMWORD PTR [rbp+16]
vmovdqu32 ymm2, YMMWORD PTR [rbp+48]
vpaddd ymm0, ymm1, YMMWORD PTR [rbp+80]
vmovdqu32 YMMWORD PTR [rdi], ymm0
vpaddd ymm0, ymm2, YMMWORD PTR [rbp+112]
vmovdqu32 YMMWORD PTR [rdi+32], ymm0
vzeroupper
pop rbp
ret
Compiling the same sample with the C compiler and same flags produces a ~150
lines of assembly with a lot of jumps and comparisons. The regression appeared
after GCC-7.3
>From gcc-bugs-return-641462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 10:06:02 2019
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Subject: [Bug target/90202] AVX-512 instructions not used
Date: Mon, 22 Apr 2019 10:06:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
IIRC this is a tuning decision made on purpose. If you use just -mavx512f
instead of the -march, you get the code you expected.
>From gcc-bugs-return-641463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 10:10:34 2019
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Subject: [Bug c/89774] Add flag to force single precision
Date: Mon, 22 Apr 2019 10:10:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2019-04-22
CC| |segher at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=90070,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=22326
Resolution|INVALID |---
Ever confirmed|0 |1
--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
We currently only do it for trivial cases, as the example in comment 6 shows
as well. This is done during expand, which is the wrong place for it.
PR90070 is asking for better optimisation of this: do the operation in single
precision, and use single-precision constants, if this does not change the
result (or there is some -ffast-math option).
PR22326 is also closely related. I don't think we can close any of these PRs
as a dup of another, they are all asking for slightly different things :-)
>From gcc-bugs-return-641464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 10:17:19 2019
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Subject: [Bug libstdc++/90203] Can't compare "const std::pair<int, int>" with "std::pair<const int, int>"
Date: Mon, 22 Apr 2019 10:17:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c++ |libstdc++
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
There is usually a reason when all compilers agree: that's what the standard
dictates. You probably need to present a proposal to the standardization
committee explaining the extension you want.
(It would seem sensible to me to be able to compare pair<A,B> < pair<C,D> as
long as one can do A<=>C (or A<C and C<A) and B<D)
>From gcc-bugs-return-641465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 11:14:07 2019
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Subject: [Bug target/90202] AVX-512 instructions not used
Date: Mon, 22 Apr 2019 11:14:00 -0000
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--- Comment #2 from Antony Polukhin <antoshkka at gmail dot com> ---
Then I'm fine with the current codegen.
However with -mavx512f it produces a few additional instructions for rbp
register
test(v, v):
push rbp ; not necessary
mov rax, rdi
mov rbp, rsp ; not necessary
vmovdqu32 zmm1, ZMMWORD PTR [rbp+16] ; could use rsp directly
vpaddd zmm0, zmm1, ZMMWORD PTR [rbp+80] ; could use rsp directly
vmovdqu32 ZMMWORD PTR [rdi], zmm0
vzeroupper
pop rbp ; not necessary
ret
>From gcc-bugs-return-641466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 11:19:09 2019
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Subject: [Bug c++/90205] New: Wformat-signedness detects %d and suggests %d fixit hint
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Version: unknown
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Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jg at jguk dot org
Target Milestone: ---
C++ trunk suggests '%d' when I '%u' is what is needed
#1 with x86-64 gcc (trunk)
<source>: In function 'int main()':
<source>:5:14: warning: format '%d' expects argument of type 'int', but
argument 2 has type 'unsigned int' [-Wformat=]
5 | printf("%d", i);
| ~^ ~
| | |
| int unsigned int
| %d
Compiler returned: 0
#include <cstdio>
int main()
{
unsigned int i = 0;
printf("%d", i);
}
Another is %f is suggested, but the message states 'double' instead of 'float'
#1 with x86-64 gcc (trunk)
<source>: In function 'int main()':
<source>:5:14: warning: format '%d' expects argument of type 'int', but
argument 2 has type 'double' [-Wformat=]
5 | printf("%d", i);
| ~^ ~
| | |
| int double
| %f
Compiler returned: 0
#include <cstdio>
int main()
{
float i = 0;
printf("%d", i);
}
>From gcc-bugs-return-641467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 11:56:36 2019
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Subject: [Bug fortran/90198] internal compiler error: in convert_move, at expr.c:229
Date: Mon, 22 Apr 2019 11:56:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-22
Ever confirmed|0 |1
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from at least 4.8 up to trunk (9.0). The ICE reported in comment 0 is
emitted for compilers configured with --enable-checking=release. For those
configures with --enable-checking=yes the ICE is
pr90198.f90:24:0:
24 | real function l_t_field(temp,nh)
|
Error: type mismatch in binary expression
real(kind=4)
real(kind=4)
real(kind=4) (*<T5f8>) (void)
_4 = rho_0 * heat_function_field;
pr90198.f90:24:0: internal compiler error: verify_gimple failed
>From gcc-bugs-return-641468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:14:10 2019
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Subject: [Bug c/82542] -fdump-lang-raw (formerly -fdump-translation-unit) no longer available for C
Date: Mon, 22 Apr 2019 12:14:00 -0000
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--- Comment #12 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Richard, I have no idea. AFAICT all the dump_tu stuff is in the C++ FE.
>From gcc-bugs-return-641469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:17:41 2019
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Subject: [Bug fortran/90198] internal compiler error: in convert_move, at expr.c:229
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This is a duplicate of pr80467.
*** This bug has been marked as a duplicate of bug 80467 ***
>From gcc-bugs-return-641470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:17:41 2019
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Subject: [Bug fortran/80467] Function Without Arguments Fails to Generate Error When Declared Later
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |g.granda at irya dot unam.mx
--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 90198 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-641471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:19:09 2019
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
%f is correct for double.
>From gcc-bugs-return-641472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:20:20 2019
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Subject: [Bug fortran/88099] ICE in maybe_legitimize_operand, at optabs.c:7170
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Priority|P3 |P4
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See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=80467
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Related to/duplicate of pr80467.
>From gcc-bugs-return-641474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:26:46 2019
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Subject: [Bug fortran/50974] ICE on invalid on function used as variable
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----------------------------------------------------------------------------
CC| |jeffrey.armstrong@approxima
| |trix.com
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 80467 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-641473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:26:46 2019
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Subject: [Bug fortran/80467] Function Without Arguments Fails to Generate Error When Declared Later
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr50974.
*** This bug has been marked as a duplicate of bug 50974 ***
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Subject: [Bug tree-optimization/89804] optimization opportunity: move variable from stack to register
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
That sounds not too hard to fix, no?
Expand should expand and not do all kinds of other things. Also, doing this
optimisation in RTL is much harder to do than in gimple, I think.
>From gcc-bugs-return-641476-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:37:59 2019
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Subject: [Bug tree-optimization/89811] uint32_t load is not recognized if shifts are done in a fixed-size loop
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
On PowerPC, for "bad" we get
addi 9,3,2
lbz 0,1(3)
lbz 3,0(3)
lhbrx 10,0,9
rlwimi 0,10,8,0,31-8
rlwimi 3,0,8,0,31-8
rldicl 3,3,0,32
blr
(BE -m64); it managed to recognise the top two bytes as a byte-reverse load,
but not the lower two.
(And yup, "loop" uses no byte-reverse at all.)
>From gcc-bugs-return-641477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 12:44:08 2019
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Subject: [Bug libstdc++/90203] Can't compare "const std::pair<int, int>" with "std::pair<const int, int>"
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Not a bug, this is how the standard requires it to behave.
>From gcc-bugs-return-641478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 13:04:16 2019
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Subject: [Bug libstdc++/90203] Can't compare "const std::pair<int, int>" with "std::pair<const int, int>"
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Shreyans Doshi from comment #0)
>
> Surprisingly, const pair<int, int> and pair<const int, int> are not
> comparable, which it should be in such cases. Ideally, if a container is
> const, it should imply that all the underlying members are also const.
>
const pair<T, T> does imply the members are const, but it's still not the same
type as pair<const int, const int>, and so isn't comparable.
>From gcc-bugs-return-641479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 13:07:08 2019
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Subject: [Bug libstdc++/90203] Can't compare "const std::pair<int, int>" with "std::pair<const int, int>"
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--- Comment #4 from Shreyans Doshi <shreyans.doshi94 at gmail dot com> ---
Yeah, I checked that scenario as well. Logically both are same, but
compiler doesn't agree to that.
But as pointed out by other members, it is not just the compiler,
surprisingly it is not present in the standard itself. So, I guess I'll
have to propose it C++ std committee.
Thanks for looking into it anyways.
Regards
Shreyans
On Mon, Apr 22, 2019 at 6:34 PM redi at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90203
>
> --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to Shreyans Doshi from comment #0)
> >
> > Surprisingly, const pair<int, int> and pair<const int, int> are not
> > comparable, which it should be in such cases. Ideally, if a container is
> > const, it should imply that all the underlying members are also const.
> >
>
> const pair<T, T> does imply the members are const, but it's still not the
> same
> type as pair<const int, const int>, and so isn't comparable.
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
> You reported the bug.
>From gcc-bugs-return-641480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 13:58:39 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Looks like missing asm goto support in classify_insn to me.
>From gcc-bugs-return-641481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 14:31:07 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46222
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46222&action=edit
gcc9-pr90193.patch
Untested fix.
>From gcc-bugs-return-641482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 14:45:37 2019
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Subject: [Bug tree-optimization/90021] [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
From what I can see, a fix for this has been acked 11 days ago:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00413.html
Bin, are you going to commit it?
>From gcc-bugs-return-641483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 14:59:04 2019
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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--- Comment #11 from Mathieu Desnoyers <mathieu.desnoyers at efficios dot com> ---
The proposed fix "gcc9-pr90193.patch" applied on top of gcc-8.3.0 fixes the
issue for both x86-64 and for x86-32 (-m32) from a 64-bit x86 gcc.
>From gcc-bugs-return-641484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 15:01:16 2019
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Subject: [Bug target/88474] Inline built-in hypot for -ffast-math
Date: Mon, 22 Apr 2019 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88474
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
CC| |segher at gcc dot gnu.org
Resolution|FIXED |---
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It isn't implemented for any other targets yet. When I use __builtin_hypot
with -ffast-math (I tried on powerpc64-linux) I get a call to __hypot_finite,
instead of just three machine instructions, like e.g.
fmul 2,2,2
fmadd 1,1,1,2
fsqrt 1,1
which is what you get for
double hypot(double x, double y) { return __builtin_sqrt(x*x + y*y); }
Reopened. (Or do you want this PR to be just for x87? If so, why?)
>From gcc-bugs-return-641485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 16:09:19 2019
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Subject: [Bug ada/90206] New: GNAT gcc ada function out argument not support with -gnat12
Date: Mon, 22 Apr 2019 16:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90206
Bug ID: 90206
Summary: GNAT gcc ada function out argument not support with
-gnat12
Product: gcc
Version: 4.5.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: leonard.kramer at boeing dot com
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Created attachment 46223
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46223&action=edit
Verbose output from gcc -v -save-temps -gnat12
Using ada with -gnat12 switch, function access type passed to generic package
does not support "out" qualified arguments contrary to ada 2012 specification.
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Subject: [Bug target/87532] bad results from vec_extract(unsigned char, foo) dependent upon function inline
Date: Mon, 22 Apr 2019 16:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87532
--- Comment #19 from kelvin at gcc dot gnu.org ---
Author: kelvin
Date: Mon Apr 22 16:09:13 2019
New Revision: 270493
URL: https://gcc.gnu.org/viewcvs?rev=270493&root=gcc&view=rev
Log:
gcc/ChangeLog:
2019-04-22 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
When handling vec_extract, use modular arithmetic to allow
constant selectors greater than vector length.
* config/rs6000/rs6000.c (rs6000_expand_vector_extract): Allow
V1TImode vectors to have constant selector values greater than 0.
Use modular arithmetic to compute vector index.
(rs6000_split_vec_extract_var): Use modular arithmetic to compute
index for in-memory vectors. Correct code generation for
in-register vectors. Use inner mode of vector rather than mode of
destination for move instruction.
(altivec_expand_vec_ext_builtin): Use modular arithmetic to
compute index.
2019-04-12 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/vsx.md (*vsx_extract_<mode>_<VS_scalar>mode_var):
Use QI inner mode with V16QI vector mode.
gcc/testsuite/ChangeLog:
2019-04-22 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* gcc.target/powerpc/pr87532-mc.c: New test.
* gcc.target/powerpc/pr87532.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2.h: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2a.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2b.c: New test.
* gcc.target/powerpc/vsx-builtin-10a.c: New test.
* gcc.target/powerpc/vsx-builtin-10b.c: New test.
* gcc.target/powerpc/vsx-builtin-11a.c: New test.
* gcc.target/powerpc/vsx-builtin-11b.c: New test.
* gcc.target/powerpc/vsx-builtin-12a.c: New test.
* gcc.target/powerpc/vsx-builtin-12b.c: New test.
* gcc.target/powerpc/vsx-builtin-13a.c: New test.
* gcc.target/powerpc/vsx-builtin-13b.c: New test.
* gcc.target/powerpc/vsx-builtin-14a.c: New test.
* gcc.target/powerpc/vsx-builtin-14b.c: New test.
* gcc.target/powerpc/vsx-builtin-15a.c: New test.
* gcc.target/powerpc/vsx-builtin-15b.c: New test.
* gcc.target/powerpc/vsx-builtin-16a.c: New test.
* gcc.target/powerpc/vsx-builtin-16b.c: New test.
* gcc.target/powerpc/vsx-builtin-17a.c: New test.
* gcc.target/powerpc/vsx-builtin-17b.c: New test.
* gcc.target/powerpc/vsx-builtin-18a.c: New test.
* gcc.target/powerpc/vsx-builtin-18b.c: New test.
* gcc.target/powerpc/vsx-builtin-19a.c: New test.
* gcc.target/powerpc/vsx-builtin-19b.c: New test.
* gcc.target/powerpc/vsx-builtin-20a.c: New test.
* gcc.target/powerpc/vsx-builtin-20b.c: New test.
* gcc.target/powerpc/vsx-builtin-9a.c: New test.
* gcc.target/powerpc/vsx-builtin-9b.c: New test.
2019-03-19 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/89736
* gcc.target/powerpc/pr87532-mc.c: Modify dejagnu directives to
restrict this test to vsx targets.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr87532-mc.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr87532.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2.h
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9b.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000-c.c
branches/gcc-7-branch/gcc/config/rs6000/rs6000.c
branches/gcc-7-branch/gcc/config/rs6000/vsx.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-641486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 16:09:49 2019
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From: "kelvin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89736] New test pr87532-mc.c fails on compiler not defaulting to VSX
Date: Mon, 22 Apr 2019 16:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89736
--- Comment #6 from kelvin at gcc dot gnu.org ---
Author: kelvin
Date: Mon Apr 22 16:09:13 2019
New Revision: 270493
URL: https://gcc.gnu.org/viewcvs?rev=270493&root=gcc&view=rev
Log:
gcc/ChangeLog:
2019-04-22 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
When handling vec_extract, use modular arithmetic to allow
constant selectors greater than vector length.
* config/rs6000/rs6000.c (rs6000_expand_vector_extract): Allow
V1TImode vectors to have constant selector values greater than 0.
Use modular arithmetic to compute vector index.
(rs6000_split_vec_extract_var): Use modular arithmetic to compute
index for in-memory vectors. Correct code generation for
in-register vectors. Use inner mode of vector rather than mode of
destination for move instruction.
(altivec_expand_vec_ext_builtin): Use modular arithmetic to
compute index.
2019-04-12 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* config/rs6000/vsx.md (*vsx_extract_<mode>_<VS_scalar>mode_var):
Use QI inner mode with V16QI vector mode.
gcc/testsuite/ChangeLog:
2019-04-22 Kelvin Nilsen <kelvin@gcc.gnu.org>
Backport from mainline
2019-03-15 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/87532
* gcc.target/powerpc/pr87532-mc.c: New test.
* gcc.target/powerpc/pr87532.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2.h: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2a.c: New test.
* gcc.target/powerpc/vec-extract-v16qiu-v2b.c: New test.
* gcc.target/powerpc/vsx-builtin-10a.c: New test.
* gcc.target/powerpc/vsx-builtin-10b.c: New test.
* gcc.target/powerpc/vsx-builtin-11a.c: New test.
* gcc.target/powerpc/vsx-builtin-11b.c: New test.
* gcc.target/powerpc/vsx-builtin-12a.c: New test.
* gcc.target/powerpc/vsx-builtin-12b.c: New test.
* gcc.target/powerpc/vsx-builtin-13a.c: New test.
* gcc.target/powerpc/vsx-builtin-13b.c: New test.
* gcc.target/powerpc/vsx-builtin-14a.c: New test.
* gcc.target/powerpc/vsx-builtin-14b.c: New test.
* gcc.target/powerpc/vsx-builtin-15a.c: New test.
* gcc.target/powerpc/vsx-builtin-15b.c: New test.
* gcc.target/powerpc/vsx-builtin-16a.c: New test.
* gcc.target/powerpc/vsx-builtin-16b.c: New test.
* gcc.target/powerpc/vsx-builtin-17a.c: New test.
* gcc.target/powerpc/vsx-builtin-17b.c: New test.
* gcc.target/powerpc/vsx-builtin-18a.c: New test.
* gcc.target/powerpc/vsx-builtin-18b.c: New test.
* gcc.target/powerpc/vsx-builtin-19a.c: New test.
* gcc.target/powerpc/vsx-builtin-19b.c: New test.
* gcc.target/powerpc/vsx-builtin-20a.c: New test.
* gcc.target/powerpc/vsx-builtin-20b.c: New test.
* gcc.target/powerpc/vsx-builtin-9a.c: New test.
* gcc.target/powerpc/vsx-builtin-9b.c: New test.
2019-03-19 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/89736
* gcc.target/powerpc/pr87532-mc.c: Modify dejagnu directives to
restrict this test to vsx targets.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr87532-mc.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr87532.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2.h
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vec-extract-v16qiu-v2b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-10b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-11b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-12b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-13b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-14b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-15b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-16b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-17b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-18b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-19b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-20b.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9a.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/vsx-builtin-9b.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000-c.c
branches/gcc-7-branch/gcc/config/rs6000/rs6000.c
branches/gcc-7-branch/gcc/config/rs6000/vsx.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/90206] GNAT gcc ada function out argument not support with -gnat12
Date: Mon, 22 Apr 2019 16:11:00 -0000
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--- Comment #1 from Leonard Kramer <leonard.kramer at boeing dot com> ---
Created attachment 46224
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46224&action=edit
Main package body
Package program that exhibits the bug.
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Subject: [Bug ada/90206] GNAT gcc ada function out argument not support with -gnat12
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--- Comment #2 from Leonard Kramer <leonard.kramer at boeing dot com> ---
Created attachment 46225
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.ads specification code.
Spec for generic function that exhibits the bug.
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
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Subject: [Bug ada/90206] GNAT gcc ada function out argument not support with -gnat12
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--- Comment #3 from Leonard Kramer <leonard.kramer at boeing dot com> ---
Created attachment 46226
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.adb body of generic function exhibiting the bug.
Body of generic function that exhibits the bug.
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Subject: [Bug ada/90206] GNAT gcc ada function out argument not support with -gnat12
Date: Mon, 22 Apr 2019 16:18:00 -0000
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--- Comment #4 from Leonard Kramer <leonard.kramer at boeing dot com> ---
The issue is that Ada2012 supports functions with arguments qualified with an
"out" or "in out" keyword. (Originally, Ada did not support functions that
permitted modifying arguments.) When I attempt to create a generic package,
passing a function "access" type, the compiler fails complaining that
'functions can only have "in" parameters'
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Subject: [Bug ada/90206] GNAT gcc ada function out argument not support with -gnat12
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--- Comment #5 from Leonard Kramer <leonard.kramer at boeing dot com> ---
Created attachment 46227
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Makefile to demonstrate bug
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90201] -Werror=useless-cast in move constructir
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-22
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. This is a warning, not an error. Reporting that you get an error because
you turned it into an error doesn't change that is a warning :-)
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87366] [7/8/9 Regression] SFINAE trait as template parameter causes incorrect application of trait to other areas
Date: Mon, 22 Apr 2019 19:17:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Apr 22 19:16:46 2019
New Revision: 270494
URL: https://gcc.gnu.org/viewcvs?rev=270494&root=gcc&view=rev
Log:
PR c++/87366 - wrong error with alias template.
With this testcase the code in template_args_equal to treat aliases as
distinct wasn't sufficient, because it only looked at the top level, whereas
here we have a reference to the alias. So let's also handle treating them
as distinct in structural_comptypes. For GCC 10 I have a more comprehensive
patch, but for GCC 9 let's go with this smaller change.
* typeck.c (structural_comptypes): When comparing_specializations,
aliases are unequal.
(comptypes): When comparing_specializations, do structural
comparison.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/alias-decl-66.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
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Subject: [Bug c++/89910] [7/8/9 Regression] ICE in make_ssa_name_fn with VLA cast
Date: Mon, 22 Apr 2019 19:24:00 -0000
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----------------------------------------------------------------------------
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Yes.
*** This bug has been marked as a duplicate of bug 88256 ***
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Subject: [Bug c++/88256] [7/8/9 Regression] ICE: Segmentation fault (in make_ssa_name_fn), C++ FE missing DECL_EXPRs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88256
--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 89910 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-641498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 19:48:57 2019
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From: "tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/90207] New: Debugging generated tree code
Date: Mon, 22 Apr 2019 19:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90207
Bug ID: 90207
Summary: Debugging generated tree code
Product: gcc
Version: unknown
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Fortran statements are translated into trees (as seen with
-fdump-tree-original). I would help if there was a flag which
allowed inspecting values of individual variables and stepping
through the generated vs. the original source code.
This could also be implemented by a transformation of
what -fdump-tree-original produces into a valid C program,
using data structures from libgfortran.
>From gcc-bugs-return-641499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 19:53:24 2019
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Subject: [Bug fortran/90207] Debugging generated tree code
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |internal-improvement
Target Milestone|--- |10.0
>From gcc-bugs-return-641500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 20:02:51 2019
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From: "nfxjfg at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/90181] Feature request: provide a way to explicitly select specific named registers in constraints
Date: Mon, 22 Apr 2019 20:02:00 -0000
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--- Comment #6 from nfxjfg at googlemail dot com ---
Yes, it's clear that that the constraint can't be _just_ the register name,
since they'll clash with builtin constraints now or with future architectures
(which may add arbitrary register names). The proposed "*registername" is
pretty nice, though. Having this would be great.
I didn't find a RISC-V builtin for ecall (maybe I looked in the wrong place).
That wouldbn't be sufficient anyway. Another situation where I wanted to
specify many fixed register constraints was a piece of inline code that did
some syscalls without touching the stack (it needed all inputs as registers,
and in specific registers, and have some registers for free use by the asm code
itself).
Throwing macros at the problem does help to reduce the duplication, but I think
this proposed extension would solve this in a better way.
>From gcc-bugs-return-641501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 20:16:02 2019
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Subject: [Bug tree-optimization/89847] Simplify subexpressions of % constant
Date: Mon, 22 Apr 2019 20:16:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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CC| |segher at gcc dot gnu.org
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
They didn't test the right targets ;-)
While for x86_64 you get
movl %edi, %eax
sall $5, %eax
subl %edi, %eax
addl $27961, %eax
andl $15, %eax
ret
and for aarch64 you get
lsl w1, w0, 5
sub w0, w1, w0
mov w1, 27961
add w0, w0, w1
and w0, w0, 15
ret
for sparc{,64} you get
sethi %hi(27648), %g1
or %g1, 313, %g1
sub %g1, %o0, %o0
jmp %o7+8
and %o0, 15, %o0
(the mul-by-31 was optimised away by combine).
While for 32-bit powerpc you get
mulli 3,3,31
addi 3,3,27961
rlwinm 3,3,0,28,31
blr
(if you don't set a modern -mcpu=, anyway), for powerpc64 you get
subfic 3,3,9
rldicl 3,3,0,60
blr
This again is done by combine:
Trying 10, 11 -> 12:
10: r129:SI=r128:SI-r132:DI#4
REG_DEAD r132:DI
REG_DEAD r128:SI
11: r130:SI=r129:SI+0x6d39
REG_DEAD r129:SI
12: r125:SI=r130:SI&0xf
REG_DEAD r130:SI
Failed to match this instruction:
(set (reg:SI 125)
(and:SI (minus:SI (const_int 9 [0x9])
(subreg:SI (reg:DI 132) 4))
(const_int 15 [0xf])))
Successfully matched this instruction:
(set (reg:SI 130)
(minus:SI (const_int 9 [0x9])
(subreg:SI (reg:DI 132) 4)))
Successfully matched this instruction:
(set (reg:SI 125)
(and:SI (reg:SI 130)
(const_int 15 [0xf])))
Ideally this would be done in gimple already, of course. Combine cannot
handle this in general.
>From gcc-bugs-return-641502-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 20:21:36 2019
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90173] [9 Regression] ICE: Segmentation fault (in strip_declarator_types)
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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CC| |paolo.carlini at oracle dot com
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--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
I believe we can cut it short and simply do (passes testing):
Index: decl.c
===================================================================
--- decl.c (revision 270483)
+++ decl.c (working copy)
@@ -10973,6 +10973,7 @@ grokdeclarator (const cp_declarator *declarator,
error_at (typespec_loc, "template placeholder type %qT must be followed
"
"by a simple declarator-id", type);
inform (DECL_SOURCE_LOCATION (tmpl), "%qD declared here", tmpl);
+ return error_mark_node;
}
staticp = 0;
>From gcc-bugs-return-641503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 20:46:16 2019
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
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--- Comment #2 from Jonny Grant <jg at jguk dot org> ---
(In reply to Andreas Schwab from comment #1)
> %f is correct for double.
Yes, the float was promoted to double via the ellipsis ... as I understand it
(default type promotion - I am sure you know a lot more about this than I do),
but the message should say 'float' like the following I thought?
The 'argument' is float, within the printf it arrives as a 'parameter' of type
double after the promotion before the call.
I guess what I am saying, is the message should state the type before the
promotion? Clang does it as I expect
I expected:
<source>:5:14: warning: format '%d' expects argument of type 'int', but
argument 2 has type 'float' [-Wformat=]
5 | printf("%d", i);
| ~^ ~
| | |
| int float
| %f
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
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--- Comment #3 from Jonny Grant <jg at jguk dot org> ---
A clang++ example, doing it as I expected, showing the type before automatic
promotion. I did with char, as I couldn't find a -Wformat-signedness for the
original example code in clang++
#include <stdio.h>
int main()
{
char b = 'b';
printf("%f", b);
}
#1 with x86-64 clang (trunk)
<source>:5:18: warning: format specifies type 'double' but the argument has
type 'char' [-Wformat]
printf("%f", b);
~~ ^
%c
1 warning generated.
Compiler returned: 0
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Subject: [Bug fortran/90166] Compiler Fails at Assembler
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--- Comment #6 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Apr 22 21:00:40 2019
New Revision: 270495
URL: https://gcc.gnu.org/viewcvs?rev=270495&root=gcc&view=rev
Log:
2019-04-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/90166
* decl.c (in_module_or_interface): New function to check that the
current state is in a module, submodule, or interface.
(gfc_match_prefix): Use it.
2019-04-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/90166
* gfortran.dg/submodule_22.f08: Add additional dg-error comments.
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/submodule_22.f08
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Subject: [Bug fortran/90166] Compiler Fails at Assembler
Date: Mon, 22 Apr 2019 21:02:00 -0000
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kargl at gcc dot gnu.org changed:
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--- Comment #7 from kargl at gcc dot gnu.org ---
Fixed on trunk.
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #2)
> The 'argument' is float, within the printf it arrives as a 'parameter' of
> type double after the promotion before the call.
Yes, it seems more correct to say "but argument 2 has type 'float'"
>From gcc-bugs-return-641508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 22 21:40:14 2019
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Subject: [Bug libstdc++/90192] std::vector<T>::resize() requires more than it should (CopyInsertable)
Date: Mon, 22 Apr 2019 21:40:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The requirements were altered by https://wg21.link/lwg2033 (and then simplified
by https://wg21.link/lwg2323 to remove some redundancy).
Looks like we never implemented 2033. I think we need to stop using
_M_fill_insert for resize.
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Subject: [Bug c/89774] Add flag to force single precision
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--- Comment #10 from JunMa <JunMa at linux dot alibaba.com> ---
(In reply to Segher Boessenkool from comment #9)
> We currently only do it for trivial cases, as the example in comment 6 shows
> as well. This is done during expand, which is the wrong place for it.
>
> PR90070 is asking for better optimisation of this: do the operation in single
> precision, and use single-precision constants, if this does not change the
> result (or there is some -ffast-math option).
>
> PR22326 is also closely related. I don't think we can close any of these PRs
> as a dup of another, they are all asking for slightly different things :-)
clang can do this optimization in instcombine pass. see this case:
float f4( float x ) {double t = x + 2.0; return t; }
float f5( float x ) {return x + 2.0; }
compiled with -O2 -march=native, GCC gives:
f4:
vcvtss2sd %xmm0, %xmm0, %xmm0
vaddsd .LC1(%rip), %xmm0, %xmm0
vcvtsd2ss %xmm0, %xmm0, %xmm0
ret
f5:
vaddss .LC3(%rip), %xmm0, %xmm0
ret
while clang always emits vaddss instruction.
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Subject: [Bug tree-optimization/90078] [7/8/9 Regression] ICE with deep templates caused by overflow [PATCH]
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--- Comment #9 from bin cheng <amker at gcc dot gnu.org> ---
Author: amker
Date: Tue Apr 23 04:07:46 2019
New Revision: 270500
URL: https://gcc.gnu.org/viewcvs?rev=270500&root=gcc&view=rev
Log:
PR tree-optimization/90078
* tree-ssa-loop-ivopts.c (comp_cost::operator +,-,+=,-+,/=,*=): Add
checks for infinite_cost overflow.
gcc/testsuite
* gcc/testsuite/g++.dg/tree-ssa/pr90078.C: New test.
Also fix typo in ChangeLog entry for revision 270499.
Added:
trunk/gcc/testsuite/g++.dg/tree-ssa/pr90078.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-ivopts.c
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Subject: [Bug tree-optimization/90021] [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
Date: Tue, 23 Apr 2019 04:09:00 -0000
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--- Comment #5 from bin cheng <amker at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #4)
> From what I can see, a fix for this has been acked 11 days ago:
> https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00413.html
> Bin, are you going to commit it?
I just commit it. There was a typo in PR number of ChangeLog entry, so this PR
is not update. For the record, it's
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=270499
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Iain Sandoe <iains at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |iains at gcc dot gnu.org
Target Milestone|--- |8.4
--- Comment #17 from Iain Sandoe <iains at gcc dot gnu.org> ---
I have a patch series to fix this - but it's not really appropriate this late
in stage 4. So plan is to fix in early 10 stage 1 and back port.
(you can try my pending patch series from
https://github.com/iains/gcc-8-branch, I don't expect to make too much change
from that).
the key patch for this is -
https://github.com/iains/gcc-8-branch/commit/85d8544e8cfab2e89198e83373b169b29c429777
but it probably won't apply cleanly without the preceding ones.
>From gcc-bugs-return-641514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 07:05:50 2019
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Subject: [Bug tree-optimization/90021] [9 Regression] ICE in index_in_loop_nest, at tree-data-ref.h:587 since r270203
Date: Tue, 23 Apr 2019 07:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: amker
Date: Tue Apr 23 03:54:59 2019
New Revision: 270499
URL: https://gcc.gnu.org/viewcvs?rev=270499&root=gcc&view=rev
Log:
PR tree-optimization/92001
* tree-chrec.c (evolution_function_is_univariate_p): New parameter
and check univariate against it.
* tree-chrec.h (evolution_function_is_univariate_p): New parameter.
* tree-data-ref.c (add_other_self_distances): Pass new argument.
gcc/testsuite
* gcc/testsuite/gfortran.dg/pr90021.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr90021.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-chrec.c
trunk/gcc/tree-chrec.h
trunk/gcc/tree-data-ref.c
>From gcc-bugs-return-641515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 07:31:51 2019
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Subject: [Bug translation/90119] Merge translation msgids that only differ in placeholders
Date: Tue, 23 Apr 2019 07:31:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Thank you Roland for working on that. Can you please integrate your script
with:
contrib/check-internal-format-escaping.py
?
>From gcc-bugs-return-641516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 07:36:14 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/90208] New: [7/8/9 Regression] error: EH landing pad label
Date: Tue, 23 Apr 2019 07:36:00 -0000
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Bug ID: 90208
Summary: [7/8/9 Regression] error: EH landing pad label
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
This is a following up of PR89280:
$ gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/pr89280.c
-fexceptions -fsanitize=thread -O3
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/pr89280.c: In
function ‘test4’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/pr89280.c:48:1:
error: EH landing pad label
48 | }
| ^
<L6> is not first in a sequence of labels in bb 4during GIMPLE pass: einline
/home/marxin/Programming/gcc/gcc/testsuite/gcc.c-torture/compile/pr89280.c:48:1:
internal compiler error: verify_flow_info failed
0x8d931b verify_flow_info()
/home/marxin/Programming/gcc/gcc/cfghooks.c:265
0xd4a684 checking_verify_flow_info
/home/marxin/Programming/gcc/gcc/cfghooks.h:211
0xd4a684 cleanup_tree_cfg_noloop
/home/marxin/Programming/gcc/gcc/tree-cfgcleanup.c:1108
0xd4a684 cleanup_tree_cfg(unsigned int)
/home/marxin/Programming/gcc/gcc/tree-cfgcleanup.c:1159
0xc1f0cf execute_function_todo
/home/marxin/Programming/gcc/gcc/passes.c:1930
0xc1ff7e execute_todo
/home/marxin/Programming/gcc/gcc/passes.c:2031
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
And I have also a reduced test-case that started with r269243:
$ cat ice-new.c
void *b;
void a();
void c(int d) {
while (d)
a();
}
void e() {
c(2);
__builtin_setjmp(b);
}
$ gcc -fexceptions -fsanitize=thread -O2 ice-new.c
ice-new.c: In function ‘e’:
ice-new.c:10:1: error: EH landing pad label
10 | }
| ^
<L4> is not first in a sequence of labels in bb 4during GIMPLE pass: einline
ice-new.c:10:1: internal compiler error: verify_flow_info failed
0x8d931b verify_flow_info()
/home/marxin/Programming/gcc/gcc/cfghooks.c:265
0xd4a684 checking_verify_flow_info
/home/marxin/Programming/gcc/gcc/cfghooks.h:211
0xd4a684 cleanup_tree_cfg_noloop
/home/marxin/Programming/gcc/gcc/tree-cfgcleanup.c:1108
0xd4a684 cleanup_tree_cfg(unsigned int)
/home/marxin/Programming/gcc/gcc/tree-cfgcleanup.c:1159
0xc1f0cf execute_function_todo
/home/marxin/Programming/gcc/gcc/passes.c:1930
0xc1ff7e execute_todo
/home/marxin/Programming/gcc/gcc/passes.c:2031
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-641517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 07:36:46 2019
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Subject: [Bug sanitizer/90208] [7/8/9 Regression] error: EH landing pad label
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Last reconfirmed| |2019-4-23
CC| |rguenth at gcc dot gnu.org
Target Milestone|--- |7.5
Known to fail| |7.4.0, 8.3.1, 9.0
>From gcc-bugs-return-641518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 07:37:46 2019
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Tue, 23 Apr 2019 07:37:00 -0000
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--- Comment #13 from Martin Liška <marxin at gcc dot gnu.org> ---
Can you please use:
$ export UBSAN_OPTIONS="print_stacktrace=1"
so that we see the complete back-trace? Thanks.
>From gcc-bugs-return-641519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 07:40:46 2019
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Subject: [Bug libstdc++/90045] [9 Regression] fails to build a rx-elf cross toolchain with C++ enabled
Date: Tue, 23 Apr 2019 07:40:00 -0000
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--- Comment #14 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Nick Clifton from comment #13)
> FYI - I have now checked in a patch to the RX assembler which fixes this
> problem.
>
> Martin - I will leave it to you to verify that the build now works (since I
> am lazy, and it is the start of a long weekend) but if there are problems
> please let me know.
>
> Cheers
> Nick
Yep, I'm fine with that. Thanks for the fix.
>From gcc-bugs-return-641520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 07:49:58 2019
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Subject: [Bug target/65886] [5/6 Regression] Copy reloc in PIE incompatible with DSO created by -Wl,-Bsymbolic
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Florian Weimer <fw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fw at gcc dot gnu.org
--- Comment #38 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #28)
> (In reply to Thiago Macieira from comment #27)
> > (In reply to Jakub Jelinek from comment #26)
> > > Plus, if KDE uses so small binaries, why don't just compile them with -fPIC
> > > then?
> > > You can then link them as normal executables or PIEs, depending on what you
> > > prefer, and still it supposedly wouldn't use copy relocations, as all
> > > references to externals would be through .got.
> >
> > Can you guarantee that the linker won't generate copy relocs for -fPIC?
>
> Yes.
I do not think this follows from the ELF specification, so portable
applications cannot assume this. Considering the recent proliferation of link
editors, relying on specific BFD ld behavior seems increasingly unwise.
(Not sure why this bug is marked RESOLVED/FIXED—shouldn't it be INVALID?)
>From gcc-bugs-return-641521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 08:09:19 2019
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Tue, 23 Apr 2019 08:09:00 -0000
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--- Comment #14 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Yeah, the patch I committed fixed two separate instances of
undefined overflow, but I think there are a lot more left.
The testsuite results with bootstrap-ubsan show a lot of failures
generally, so the compiler isn't UB-free even for our existing tests.
I fixed another instance in r85164 that was unrelated to the testcases
in this PR, so if you're just applying the patches locally, it'd be worth
trying that as well.
Could you open separate PRs for the new tests? We could perhaps
have a meta-bug for ubsan failures too, if we don't already.
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Tue, 23 Apr 2019 08:10:00 -0000
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--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> Could you open separate PRs for the new tests? We could perhaps
> have a meta-bug for ubsan failures too, if we don't already.
We do have one ('ubsan' alias name):
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
Date: Tue, 23 Apr 2019 08:40:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-23
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.4
Summary|ICE in extract_insn, at |[8/9 Regression] ICE in
|recog.c:2304 x86_64 |extract_insn, at
| |recog.c:2304 x86_64
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Doesn't reproduce on the trunk starting with r265489, likely latent afterwards.
Started with r253975, likely latent before.
I'll have a look.
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From: "vegard.nossum at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/90209] New: codegen regression (x < 0 ? -x : x) results in branch instead of single instruction on x86_64
Date: Tue, 23 Apr 2019 08:48:00 -0000
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Bug ID: 90209
Summary: codegen regression (x < 0 ? -x : x) results in branch
instead of single instruction on x86_64
Product: gcc
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This test case:
double abs1(double x) {
return x < 0 ? -x : x;
}
used to generate just a single "andpd" instruction before r131381
(5921cbdff68):
abs1:
andpd .LC2(%rip), %xmm0
ret
afterward this revision, it generated this:
fabs1:
movapd %xmm0, %xmm1
ucomisd .LC0(%rip), %xmm0
jb .L7
.L2:
movapd %xmm1, %xmm0
ret
.L7:
jp .L2
movsd .LC1(%rip), %xmm0
xorpd %xmm0, %xmm1
movapd %xmm1, %xmm0
ret
The branch is still present on trunk, as can be seen here:
https://godbolt.org/z/P4tQMB
Thanks to jakub for narrowing it down to r131375..r131425.
Three related bugs (AFAICT) are #29253, #62055, and #64897.
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Simplified testcase:
double a[64];
double *foo (void);
void
bar (int x, const double *y)
{
int i;
for (i = 0; i < x; i++)
if (y[i] < a[i])
a[i] = y[i];
}
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
It looks like middle-end is bypassing sminv2df3 expander and constructs RTX by
hand. This should not be done, since the expander decides whether IEEE or
non-IEEE variant should be used.
Please note that there is also an issue with {smax,smin}{sf,df}3, where
&& !(MEM_P (operands[1]) && MEM_P (operands[2]))
is (intentionally?) missing, and we depend on RA to fix invalid RTX.
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Subject: [Bug c++/90196] std:: types unused without warnings but simple type not affected
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to МакÑим Прохоренко from comment #3)
> Allocate GiB of unused memory and don't warn about it? But 1 simple double -
> it is a big problem.
Nobody said that. But the warning has to be driven by simple rules. An unused
double is easy to detect and warn about. Knowing if a complex type exists for
some reason that the compiler can't infer is harder to do.
> For std:: objects with side effect - OK!
> But for simple unused vector or set or map???
Destroying elements and deallocating memory is a side effect.
The compiler doesn't do arbitrarily complex analysis of what a destructor does,
it just considers a non-trivial destructor to be doing something.
>From gcc-bugs-return-641528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 09:14:23 2019
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is not what I see.
I see that vcondv2dfv2df is being expanded, and that one has general_operand
and vector_operand predicates which do allow MEM.
That calls ix86_expand_sse_fp_minmax which doesn't ensure both operands aren't
MEM.
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Subject: [Bug rtl-optimization/90209] codegen regression (x < 0 ? -x : x) results in branch instead of single instruction on x86_64
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Try with -fno-signed-zeros.
>From gcc-bugs-return-641530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 09:41:57 2019
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Subject: [Bug c++/90173] [9 Regression] ICE: Segmentation fault (in strip_declarator_types)
Date: Tue, 23 Apr 2019 09:41:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC|paolo.carlini at oracle dot com |
Assignee|unassigned at gcc dot gnu.org |paolo.carlini at oracle dot com
Target Milestone|--- |9.0
--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Mine.
>From gcc-bugs-return-641531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 09:50:25 2019
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
Date: Tue, 23 Apr 2019 09:50:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46228
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46228&action=edit
gcc9-pr90187.patch
Untested fix.
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87431
--- Comment #23 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Apr 23 09:55:33 2019
New Revision: 270502
URL: https://gcc.gnu.org/viewcvs?rev=270502&root=gcc&view=rev
Log:
Fix std::variant regression caused by never-valueless optimization
A regression was introduced by the recent changes to provide the strong
exception safety guarantee for "never valueless" types that have O(1),
non-throwing move assignment. The problematic code is:
else if constexpr (__detail::__variant::_Never_valueless_alt<type>())
{
// This construction might throw:
variant __tmp(in_place_index<_Np>, __il,
std::forward<_Args>(__args)...);
// But _Never_valueless_alt<type> means this won't:
*this = std::move(__tmp);
}
When the variant is not assignable, the assignment is ill-formed, so
should not be attempted. When the variant has a copy assignment operator
but not a move assignment operator, the assignment performs a copy
assignment and that could throw, so should not be attempted.
The solution is to only take that branch when the variant has a move
assignment operator, which is determined by the _Traits::_S_move_assign
constant. When that is false the strong exception safety guarantee is
not possible, and so the __never_valueless function should also depend
on _S_move_assign.
While testing the fixes for this I noticed that the partial
specialization _Never_valueless_alt<basic_string<C,T,A>> incorrectly
assumed that is_nothrow_move_constructible<basic_string<C,T,A>> is
always true, but that's wrong for fully-dynamic COW strings. Fix the
partial specialization, and improve the comment describing
_Never_valueless_alt to be clear it depends on move construction as well
as move assignment.
Finally, I also observed that _Variant_storage<false, T...>::_M_valid()
was not taking advantage of the __never_valueless<T...>() function to
avoid a runtime check. Only the _Variant_storage<true, T...>::_M_valid()
function was using __never_valueless. That is also fixed.
PR libstdc++/87431
* include/bits/basic_string.h (_Never_valueless_alt): Make partial
specialization also depend on is_nothrow_move_constructible.
* include/std/variant (__detail::__variant::__never_valueless()):
Only true if the variant would have a move assignment operator.
(__detail::__variant::_Variant_storage<false, T...>::_M_valid()):
Check __never_valueless<T...>().
(variant::emplace): Only perform non-throwing move assignments
for never-valueless alternatives if the variant has a move assignment
operator.
* testsuite/20_util/variant/compile.cc: Check that never-valueless
types can be emplaced into non-assignable variants.
* testsuite/20_util/variant/run.cc: Check that never-valueless types
don't get copied when emplaced into non-assignable variants.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/basic_string.h
trunk/libstdc++-v3/include/std/variant
trunk/libstdc++-v3/testsuite/20_util/variant/compile.cc
trunk/libstdc++-v3/testsuite/20_util/variant/run.cc
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Subject: [Bug c++/90210] New: [C++17] CTAD forbidding explicit deduction guide for copy-list-initialization
Date: Tue, 23 Apr 2019 09:56:00 -0000
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Bug ID: 90210
Summary: [C++17] CTAD forbidding explicit deduction guide for
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gcc currently allows the following code:
template<typename T> struct tuple { tuple(T); };
template<typename T> explicit tuple(T t) -> tuple<T>;
tuple t = { 1 };
this should fail to compile because the deduction guide is marked explicit.
the issue may come from the implicit deduction guide not being overridden by
the user defined one.
example from other compilers:
https://godbolt.org/z/M198L5
the standard says in [over.match.list]:
"In copy-list-initialization, if an explicit constructor is chosen, the
initialization is ill-formed."
>From gcc-bugs-return-641534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 09:58:03 2019
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
Date: Tue, 23 Apr 2019 09:58:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Or would you prefer:
--- gcc/config/i386/i386.c.jj 2019-04-16 10:40:15.077091789 +0200
+++ gcc/config/i386/i386.c 2019-04-23 11:55:59.397227347 +0200
@@ -23712,7 +23712,10 @@ ix86_expand_sse_fp_minmax (rtx dest, enu
else
{
code = is_min ? SMIN : SMAX;
- tmp = gen_rtx_fmt_ee (code, mode, if_true, if_false);
+ rtx operands[3] = { dest, if_true, if_false };
+ ix86_fixup_binary_operands_no_copy (code, mode, operands);
+ tmp = gen_rtx_fmt_ee (code, mode, operands[1], operands[2]);
+ dest = operands[0];
}
emit_insn (gen_rtx_SET (dest, tmp));
instead? I think a switch on mode to handle all the possible modes in there
and assign the different gen_{smin,smax}* in those cases would be too large.
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
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--- Comment #78 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 23 10:03:41 2019
New Revision: 270504
URL: https://gcc.gnu.org/viewcvs?rev=270504&root=gcc&view=rev
Log:
PR target/89093
* config/arm/arm.c (aapcs_vfp_is_call_or_return_candidate): Diagnose
if used with general-regs-only.
(arm_conditional_register_usage): Don't add non-general regs if
general-regs-only.
(arm_valid_target_attribute_rec): Handle general-regs-only.
* config/arm/arm.h (TARGET_HARD_FLOAT): Return false if
general-regs-only.
(TARGET_HARD_FLOAT_SUB): Define.
(TARGET_SOFT_FLOAT): Define as negation of TARGET_HARD_FLOAT_SUB.
(TARGET_REALLY_IWMMXT): Add && !TARGET_GENERAL_REGS_ONLY.
(TARGET_REALLY_IWMMXT2): Likewise.
* config/arm/arm.opt: Add -mgeneral-regs-only.
* doc/extend.texi: Document ARM general-regs-only target.
* doc/invoke.texi: Document ARM -mgeneral-regs-only.
libgcc/
* config/arm/pr-support.c: Add #pragma GCC target("general-regs-only").
* config/arm/unwind-arm.c: Likewise.
* unwind-c.c (PERSONALITY_FUNCTION): Add general-regs-only target
attribute for ARM.
libobjc/
* exception.c (PERSONALITY_FUNCTION): Add general-regs-only target
attribute for ARM.
libphobos/
* libdruntime/gcc/deh.d: Import gcc.attribute.
(personality_fn_attributes): New enum.
(scanLSDA, CONTINUE_UNWINDING, gdc_personality, __gdc_personality):
Add @personality_fn_attributes.
libstdc++-v3/
* libsupc++/eh_personality.cc (PERSONALITY_FUNCTION): Add
general-regs-only target attribute for ARM.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.c
trunk/gcc/config/arm/arm.h
trunk/gcc/config/arm/arm.opt
trunk/gcc/doc/extend.texi
trunk/gcc/doc/invoke.texi
trunk/libgcc/ChangeLog
trunk/libgcc/config/arm/pr-support.c
trunk/libgcc/config/arm/unwind-arm.c
trunk/libgcc/unwind-c.c
trunk/libobjc/ChangeLog
trunk/libobjc/exception.c
trunk/libphobos/ChangeLog
trunk/libphobos/libdruntime/gcc/deh.d
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/libsupc++/eh_personality.cc
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Subject: [Bug debug/90131] wrong debug info at -O3
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Apr 23 10:10:10 2019
New Revision: 270505
URL: https://gcc.gnu.org/viewcvs?rev=270505&root=gcc&view=rev
Log:
2019-04-23 Richard Biener <rguenther@suse.de>
PR debug/90131
* tree-cfgcleanup.c (move_debug_stmts_from_forwarder): Add
dest_single_pred_p argument.
(remove_forwarder_block): Adjust.
(remove_forwarder_block_with_phi): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-cfgcleanup.c
>From gcc-bugs-return-641536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:10:30 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Tue, 23 Apr 2019 10:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89093
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P1 |P4
CC| |ebotcazou at gcc dot gnu.org,
| |ian at gcc dot gnu.org
--- Comment #79 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for all languages but Ada and Go, neither of them is release critical.
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Subject: [Bug c++/90101] [P0732] Error using non-type template parameter in a template template argument
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Benjamin Buch <benni.buch at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Benjamin Buch <benni.buch at gmail dot com> ---
simplified test case:
template<int N>
struct A{};
template<int N, A<N>>
struct B {};
$ g++ -std=c++2a test.cpp
test.cpp:4:17: error: invalid use of incomplete type 'struct A<N>'
4 | template<int N, A<N>>
| ^~~
test.cpp:2:8: note: declaration of 'struct A<N>'
2 | struct A{};
| ^
$ g++ --version
g++ (Compiler-Explorer-Build) 9.0.1 20190422 (experimental)
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
https://godbolt.org/z/kdDPaO
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Subject: [Bug tree-optimization/90211] New: [8/9 Regression] ICE: tree check: expected ssa_name, have real_cst in first_readonly_imm_use, at ssa-iterators.h:351
Date: Tue, 23 Apr 2019 10:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90211
Bug ID: 90211
Summary: [8/9 Regression] ICE: tree check: expected ssa_name,
have real_cst in first_readonly_imm_use, at
ssa-iterators.h:351
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20190421 snapshot (r270485) ICEs when compiling the following
testcase w/ -O3 (-Ofast) -fassociative-math -ftree-parallelize-loops=2
-fno-signed-zeros -fno-trapping-math -fno-tree-copy-prop:
double
yk (int d9)
{
double vy, q4 = 0.0;
while (d9 < 3)
{
int tc;
vy = 0.0;
tc = 0;
while (tc < d9)
{
vy += 1.0;
++tc;
}
q4 += 1.0;
++d9;
}
return vy + q4;
}
% gcc-9.0.0-alpha20190421 -O3 -fassociative-math -ftree-parallelize-loops=2
-fno-signed-zeros -fno-trapping-math -fno-tree-copy-prop -c vnd2w3xt.c
during GIMPLE pass: parloops
vnd2w3xt.c: In function 'yk':
vnd2w3xt.c:2:1: internal compiler error: tree check: expected ssa_name, have
real_cst in first_readonly_imm_use, at ssa-iterators.h:351
2 | yk (int d9)
| ^~
0x6f1e75 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree.c:9900
0x69d256 tree_check(tree_node*, char const*, int, char const*, tree_code)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree.h:3176
0x69d256 first_readonly_imm_use
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/ssa-iterators.h:351
0x69d256 try_create_reduction_list
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:2817
0x69d256 parallelize_loops
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:3392
0xe0583d execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:3506
0xe0583d execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:3485
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Subject: [Bug libstdc++/87431] valueless_by_exception() should unconditionally return false if all the constructors are noexcept
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed again, I hope.
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
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--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #6)
> Or would you prefer:
> --- gcc/config/i386/i386.c.jj 2019-04-16 10:40:15.077091789 +0200
> +++ gcc/config/i386/i386.c 2019-04-23 11:55:59.397227347 +0200
> @@ -23712,7 +23712,10 @@ ix86_expand_sse_fp_minmax (rtx dest, enu
> else
> {
> code = is_min ? SMIN : SMAX;
> - tmp = gen_rtx_fmt_ee (code, mode, if_true, if_false);
> + rtx operands[3] = { dest, if_true, if_false };
> + ix86_fixup_binary_operands_no_copy (code, mode, operands);
> + tmp = gen_rtx_fmt_ee (code, mode, operands[1], operands[2]);
> + dest = operands[0];
> }
>
> emit_insn (gen_rtx_SET (dest, tmp));
> instead? I think a switch on mode to handle all the possible modes in there
> and assign the different gen_{smin,smax}* in those cases would be too large.
No, the proposed patch that forces if_true operand to a register should be
enough. It doesn't make much difference calling ix86_fixup_binary_operands_*
without memory output operand.
>From gcc-bugs-return-641542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:21:48 2019
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Subject: [Bug c++/90210] [C++17] CTAD forbidding explicit deduction guide for copy-list-initialization
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/90211] [8/9 Regression] ICE: tree check: expected ssa_name, have real_cst in first_readonly_imm_use, at ssa-iterators.h:351
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.4
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r255267.
Cleaned up testcase:
/* PR tree-optimization/90211 */
/* { dg-do compile } */
/* { dg-require-effective-target pthread } */
/* { dg-options "-O3 -fassociative-math -ftree-parallelize-loops=2
-fno-signed-zeros -fno-trapping-math -fno-tree-copy-prop" } */
double
foo (int x)
{
double a, b = 0.0;
while (x < 3)
{
int c;
a = 0.0;
c = 0;
while (c < x)
{
a += 1.0;
++c;
}
b += 1.0;
++x;
}
return a + b;
}
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Subject: [Bug c++/90170] [7/8/9 Regression] ICE in unify, at cp/pt.c:22209
Date: Tue, 23 Apr 2019 10:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.5
>From gcc-bugs-return-641545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:41:49 2019
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Subject: [Bug c++/90172] [9 Regression] ICE: Segmentation fault (in contains_struct_check)
Date: Tue, 23 Apr 2019 10:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|error-recovery |ice-on-valid-code
Target Milestone|--- |9.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
If previous compilers didn't ICE but still reject the testcase this PR would be
P4, if we correctly accepted the code before it would be P1.
>From gcc-bugs-return-641546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:43:01 2019
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Subject: [Bug middle-end/90191] [9 regression] -Wformat-overflow depends on --param max-jump-thread-duplication-stmts\x17
Date: Tue, 23 Apr 2019 10:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So is the warning good or bad? That it now depends on the param suggests a
change in default optimization behavior.
>From gcc-bugs-return-641547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:51:57 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90212] New: [8/9 Regression] by-ref capture of constexpr class object rejected
Date: Tue, 23 Apr 2019 10:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90212
Bug ID: 90212
Summary: [8/9 Regression] by-ref capture of constexpr class
object rejected
Product: gcc
Version: 8.3.1
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Keywords: rejects-valid
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template<typename T> struct tuple {
constexpr tuple(T&& t) : t(t) { }
int t;
};
void foo() {
constexpr tuple<int> v1{1};
constexpr auto v2 = v1;
[&]{ constexpr auto v2 = v1; };
}
Since r256842 GCC 8 and trunk reject this:
a.cc: In lambda function:
a.cc:9:30: error: lambda capture of ‘v1’ is not a constant expression
[&]{ constexpr auto v2 = v1; };
^~
Clang and icc accept it, and I think it's valid.
>From gcc-bugs-return-641548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:53:44 2019
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Subject: [Bug debug/90197] [8/9 Regression] Cannot step through simple loop at -O -g
Date: Tue, 23 Apr 2019 10:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Version|unknown |8.3.1
Keywords| |wrong-debug
Last reconfirmed| |2019-04-23
CC| |aoliva at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Target Milestone|--- |8.4
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The issue is that the line number program only contains line number
6
and the consumer (gdb) doesn't handle a jump in a stmt sequence as "ending"
a line, thus 'next' advances to after the loop. We expand from
<bb 2> [local count: 118111600]:
[t.c:5:3] # DEBUG BEGIN_STMT
[t.c:5:8] # DEBUG BEGIN_STMT
[t.c:5:12] # DEBUG i => 0
# DEBUG i => 0
# DEBUG base => base_7(D)
[t.c:5:3] if (count_9(D) > 0)
goto <bb 3>; [89.00%]
else
goto <bb 5>; [11.00%]
<bb 3> [local count: 105119324]:
ivtmp.10_4 = (unsigned long) dst_10(D);
_14 = (unsigned int) count_9(D);
_15 = _14 * 15;
_21 = base_7(D) + _15;
<bb 4> [local count: 955630224]:
# base_17 = PHI <base_7(D)(3), [t.c:5:40] base_13(4)>
# ivtmp.10_6 = PHI <ivtmp.10_4(3), ivtmp.10_5(4)>
# DEBUG i => NULL
# DEBUG base => base_17
[t.c:6:5] # DEBUG BEGIN_STMT
_16 = (void *) ivtmp.10_6;
[t.c:6:12] MEM[base: _16, offset: 0B] = base_17;
[t.c:5:30] # DEBUG i => D#1
[t.c:5:40] base_13 = base_17 + 15;
[t.c:5:40] # DEBUG base => base_13
# DEBUG i => D#1
# DEBUG base => base_13
ivtmp.10_5 = ivtmp.10_6 + 4;
[t.c:5:3] if (base_13 != _21)
goto <bb 4>; [89.00%]
else
goto <bb 5>; [11.00%]
<bb 5> [local count: 118111601]:
[t.c:7:1] return;
notice how the only stmt marker inside the loop body is for t.c:6.
gimplification shows
test (unsigned int * dst, unsigned int base, int count)
[t.c:4:1] {
[t.c:5:3] # DEBUG BEGIN_STMT
[t.c:5:3] {
int i;
[t.c:5:8] # DEBUG BEGIN_STMT
[t.c:5:12] i = 0;
[t.c:5:3] goto <D.1912>;
<D.1911>:
[t.c:6:5] # DEBUG BEGIN_STMT
[t.c:6:8] _1 = (long unsigned int) i;
[t.c:6:8] _2 = _1 * 4;
[t.c:6:8] _3 = dst + _2;
[t.c:6:12] [t.c:6:8] *_3 = base;
[t.c:5:30] i = i + 1;
[t.c:5:40] base = base + 15;
<D.1912>:
[t.c:5:3] if (i < count) goto <D.1911>; else goto <D.1913>;
<D.1913>:
so the debug begin_stmt for the loop is attached before the IV
initialization. Not sure if that has consequences.
The testcase behaves as expected with -gno-statement-frontiers
Alex?
>From gcc-bugs-return-641549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:55:05 2019
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Subject: [Bug debug/90197] [8/9 Regression] Cannot step through simple loop at -O -g
Date: Tue, 23 Apr 2019 10:55:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Just to say I used gdb 8.2 for my investigation.
>From gcc-bugs-return-641550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 10:56:18 2019
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Subject: [Bug middle-end/90191] [9 regression] -Wformat-overflow depends on --param max-jump-thread-duplication-stmts\x17
Date: Tue, 23 Apr 2019 10:56:00 -0000
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--- Comment #2 from Dmitry G. Dyachenko <dimhen at gmail dot com> ---
(In reply to Richard Biener from comment #1)
> So is the warning good or bad? That it now depends on the param suggests a
> change in default optimization behavior.
Sorry not to be clear
Warning with --param ... is incorrect.
And creduced testcase has "dead" code: "if(0) goto ...;"
May be some pass (jump-threading?) cant simplify it?
If so then smth like 90037 probably will be the root PR
>From gcc-bugs-return-641551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 11:13:52 2019
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Subject: [Bug tree-optimization/90211] [8/9 Regression] ICE: tree check: expected ssa_name, have real_cst in first_readonly_imm_use, at ssa-iterators.h:351
Date: Tue, 23 Apr 2019 11:13:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-23
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46229
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46229&action=edit
gcc9-pr90211.patch
Untested fix.
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Subject: [Bug middle-end/90139] [9 Regression] ICE in emit_block_move_hints, at expr.c:1601
Date: Tue, 23 Apr 2019 12:31:00 -0000
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--- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 46230
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46230&action=edit
gcc 7 reduced testcase
>From gcc-bugs-return-641553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:32:33 2019
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Subject: [Bug middle-end/90139] [9 Regression] ICE in emit_block_move_hints, at expr.c:1601
Date: Tue, 23 Apr 2019 12:32:00 -0000
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--- Comment #7 from Rainer Orth <ro at gcc dot gnu.org> ---
While my original testcase fails on gcc 7, 8, and 9, the one reduced using gcc
9
only failed on trunk. I've now ran creduce with the original testcase against
both gcc 7 and 8. Each run produced a different reduced testcase, neither of
which is fixed by applying the trunk patch to the branches.
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Subject: [Bug middle-end/90139] [9 Regression] ICE in emit_block_move_hints, at expr.c:1601
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--- Comment #8 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 46231
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46231&action=edit
gcc 8 reduced testcase
>From gcc-bugs-return-641555-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:34:17 2019
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Subject: [Bug middle-end/90139] [9 Regression] ICE in emit_block_move_hints, at expr.c:1601
Date: Tue, 23 Apr 2019 12:34:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #9 from Rainer Orth <ro at gcc dot gnu.org> ---
Reopening as explained in Comment 7.
>From gcc-bugs-return-641556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:35:29 2019
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Subject: [Bug middle-end/90139] [7/8 Regression] ICE in emit_block_move_hints, at expr.c:1601
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[9 Regression] ICE in |[7/8 Regression] ICE in
|emit_block_move_hints, at |emit_block_move_hints, at
|expr.c:1601 |expr.c:1601
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is a 7/8 regression though then. Or do you have a testcase that still
fails on the trunk?
>From gcc-bugs-return-641557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:38:27 2019
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Tue, 23 Apr 2019 12:38:00 -0000
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--- Comment #16 from Vittorio Zecca <zeccav at gmail dot com> ---
On Saturday afternoon I had a power failure that probably damaged my disk,
so I cannot help you now.
>From gcc-bugs-return-641558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:40:22 2019
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From: "lersek at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/90167] invalid example in GCC documentation wrt. effective type rules
Date: Tue, 23 Apr 2019 12:40:00 -0000
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--- Comment #2 from Laszlo Ersek (RH) <lersek at redhat dot com> ---
(In reply to Segher Boessenkool from comment #1)
> The code accesses d, of type double, as an int. That is not a
> compatible type.
Agreed; I didn't claim it was.
> It does not matter how it got there, what pointer casts trickery with
> unions it did.
I disagree, and in my opinion, the standard disagrees too.
> You can access a union type as the type of any of its members. But a
> double is not a union type.
I didn't claim it was.
The standard writes,
An object [the double] shall have its stored value accessed only by
an lvalue expression that has one of the following types:
[...]
- a [...] union type that includes [a type compatible with the
effective type of the [double] object] among its members
It says we can access a "double" through a union which has a "double"
member.
union u {
int i;
double d1;
};
double d2;
The expression (*(union u *)&d2) is an lvalue expression that has a
union type that includes a double among its members.
To me this seems to follow from the letter of the standard. If my
interpretation is incorrect, or the standard is unclear or incorrect,
please show that. Thanks.
>From gcc-bugs-return-641559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:41:18 2019
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Subject: [Bug libstdc++/90165] std::variant constructs wrong alternative
Date: Tue, 23 Apr 2019 12:41:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> because we talk to apply this constraint:
s/talk/fail/
>From gcc-bugs-return-641560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:45:36 2019
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90139] [7/8 Regression] ICE in emit_block_move_hints, at expr.c:1601
Date: Tue, 23 Apr 2019 12:45:00 -0000
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--- Comment #11 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> That is a 7/8 regression though then. Or do you have a testcase that still
> fails on the trunk?
No: it seems the original testcase produces the same ICE in different
places on gcc 7, 8, and 9.
I'm not certain about the regression part, TBH: when I tried the
original (preprocessed) testcase with gcc [876].1.0, it ICEd on all of
them, but it wouldn't even compile on gcc 5.1.0. So I don't have a gcc
release where it worked.
>From gcc-bugs-return-641561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:47:19 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/90213] New: UBSAN: signed integer overflow: -5621332293356458048 * 8 cannot be represented in type 'long int'
Date: Tue, 23 Apr 2019 12:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90213
Bug ID: 90213
Summary: UBSAN: signed integer overflow: -5621332293356458048 *
8 cannot be represented in type 'long int'
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Fails for:
$ cat ubsan.c
int a[4];
void f()
{
long int b = 7818038963515661296;
a[0xA699ECD2C348A3A0] = a[b];
}
$ ~/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/objdir/gcc/xgcc -B
~/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/objdir/gcc/ ubsan.c -c -O
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/poly-int.h:753:21:
runtime error: signed integer overflow: -5621332293356458048 * 8 cannot be
represented in type 'long int'
#0 0x139a5ef in if_nonpoly<int, poly_int<1u, long>,
poly_int_traits<int>::is_poly>::type& poly_int<1u, long>::operator*=<int>(int
const&)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/poly-int.h:753
#1 0x139a5ef in fold_const_aggregate_ref_1(tree_node*, tree_node*
(*)(tree_node*))
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/gimple-fold.c:6992
#2 0x139bfd0 in gimple_fold_stmt_to_constant_1(gimple*, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*))
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/gimple-fold.c:6426
#3 0x25df8ec in ccp_fold
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-ccp.c:1257
#4 0x25df8ec in evaluate_stmt
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-ccp.c:1785
#5 0x25e449c in visit_assignment
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-ccp.c:2355
#6 0x284805d in ssa_propagation_engine::simulate_stmt(gimple*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-propagate.c:230
#7 0x284900c in ssa_propagation_engine::simulate_block(basic_block_def*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-propagate.c:337
#8 0x284ddc1 in ssa_propagation_engine::ssa_propagate()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-propagate.c:802
#9 0x25c726f in do_ssa_ccp
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-ccp.c:2474
#10 0x25c726f in execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/tree-ssa-ccp.c:2518
#11 0x1c6d018 in execute_one_pass(opt_pass*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2487
#12 0x1c70921 in execute_pass_list_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2573
#13 0x1c70964 in execute_pass_list_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2574
#14 0x1c70a18 in execute_pass_list(function*, opt_pass*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2584
#15 0x1c67cd6 in do_per_function_toporder(void (*)(function*, void*),
void*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:1705
#16 0x1c72d7d in execute_ipa_pass_list(opt_pass*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2932
#17 0xdb75c8 in ipa_passes
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2484
#18 0xdb75c8 in symbol_table::compile()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2620
#19 0xdc0d5b in symbol_table::compile()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2599
#20 0xdc0d5b in symbol_table::finalize_compilation_unit()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2865
#21 0x2148fc4 in compile_file
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.c:481
#22 0x7bf43a in do_compile
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.c:2205
#23 0x7bf43a in toplev::main(int, char**)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.c:2340
#24 0x83062e in main
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/main.c:39
#25 0x7ffff7976b7a in __libc_start_main ../csu/libc-start.c:308
#26 0x834749 in _start
(/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/objdir/gcc/cc1+0x834749)
>From gcc-bugs-return-641563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:48:59 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90165] std::variant constructs wrong alternative
Date: Tue, 23 Apr 2019 12:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90165
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Apr 23 12:48:18 2019
New Revision: 270509
URL: https://gcc.gnu.org/viewcvs?rev=270509&root=gcc&view=rev
Log:
PR libstdc++/90165 constrain variant(T&&) constructor
Also refactor some constraints slightly to be more readable.
PR libstdc++/90165
* include/std/variant (variant::__not_self): New helper for the
is_same_v<remove_cvref_t<T>, variant>==false constraints.
(variant::__to_type_impl): Remove.
(variant::__to_type): Add default argument to check pack size, instead
of using __to_type_impl.
(variant::__accepted_type): Add default argument using __not_self.
(variant::__is_in_place_tag, variant::__not_in_place_tag): New helpers
for variant(T&&) constructor constraint.
(variant::variant(T&&)): Use __not_in_place_tag in constraints.
Extract __accepted_type into a named template parameter for reuse in
other constraints and in the exception specification.
(variant::variant(in_place_type_t<T>, Args&&...))
(variant::variant(in_place_type_t<T>, initializer_list<U>, Args&&...))
(variant::variant(in_place_index_t<T>, Args&&...))
(variant::variant(in_place_index_t<T>, initializer_list<U>, Args&&...))
(variant::operator=T&&)): Remove redundant && from trait arguments.
* testsuite/20_util/variant/compile.cc: Check variant(T&&) constructor
isn't used for in_place_type or in_place_index arguments.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/variant
trunk/libstdc++-v3/testsuite/20_util/variant/compile.cc
>From gcc-bugs-return-641562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:48:45 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90214] New: UBSAN: signed integer overflow: 162675373468811328 - -9060696663385964544 cannot be represented in type 'long int'
Date: Tue, 23 Apr 2019 12:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90214
Bug ID: 90214
Summary: UBSAN: signed integer overflow: 162675373468811328 -
-9060696663385964544 cannot be represented in type
'long int'
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Following fails:
$ cat ubsan2.c
long b[1][9];
typedef long V __attribute__((vector_size (16), may_alias));
void
foo ()
{
V *c = (V *) ((char *) b + -9060696663385964544);
*c = (V) { 1, 1 };
long __attribute__((may_alias)) *d = (long *) ((char *) b +
162675373468811328);
*d = 1;
}
$ ~/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/objdir/gcc/xgcc -B
~/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/objdir/gcc/ ubsan2.c -c -O
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/poly-int.h:944:5:
runtime error: signed integer overflow: 162675373468811328 -
-9060696663385964544 cannot be represented in type 'long int'
#0 0x4335e62 in poly_int<1u, poly_result<long, long,
poly_coeff_pair_traits<long, long>::result_kind>::type> operator-<1u, long,
long>(poly_int_pod<1u, long> const&, poly_int_pod<1u, long> const&)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/poly-int.h:944
#1 0x4335e62 in record_store
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/dse.c:1573
#2 0x43393d2 in scan_insn
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/dse.c:2568
#3 0x43393d2 in dse_step1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/dse.c:2680
#4 0x43393d2 in rest_of_handle_dse
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/dse.c:3597
#5 0x43393d2 in execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/dse.c:3655
#6 0x1c6d018 in execute_one_pass(opt_pass*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2487
#7 0x1c70921 in execute_pass_list_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2573
#8 0x1c70964 in execute_pass_list_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2574
#9 0x1c70a18 in execute_pass_list(function*, opt_pass*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/passes.c:2584
#10 0xdb211d in cgraph_node::expand()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2198
#11 0xdb64ab in expand_all_functions
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2336
#12 0xdb64ab in symbol_table::compile()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2687
#13 0xdc0d5b in symbol_table::compile()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2599
#14 0xdc0d5b in symbol_table::finalize_compilation_unit()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/cgraphunit.c:2865
#15 0x2148fc4 in compile_file
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.c:481
#16 0x7bf43a in do_compile
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.c:2205
#17 0x7bf43a in toplev::main(int, char**)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.c:2340
#18 0x83062e in main
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/main.c:39
#19 0x7ffff7976b7a in __libc_start_main ../csu/libc-start.c:308
#20 0x834749 in _start
(/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/objdir/gcc/cc1+0x834749)
>From gcc-bugs-return-641564-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:49:25 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Tue, 23 Apr 2019 12:49:00 -0000
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--- Comment #17 from Martin Liška <marxin at gcc dot gnu.org> ---
> Could you open separate PRs for the new tests? We could perhaps
> have a meta-bug for ubsan failures too, if we don't already.
I did so: PR90213 and PR90214.
>From gcc-bugs-return-641565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 12:50:02 2019
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Subject: [Bug libstdc++/90165] std::variant constructs wrong alternative
Date: Tue, 23 Apr 2019 12:50:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Known to work| |9.0
Target Milestone|--- |8.4
Known to fail| |8.3.0
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk so far.
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Subject: [Bug tree-optimization/90208] [7/8/9 Regression] error: EH landing pad label
Date: Tue, 23 Apr 2019 12:53:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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Subject: [Bug rtl-optimization/84032] ICE in optimize_sc, at modulo-sched.c:1064
Date: Tue, 23 Apr 2019 12:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84032
--- Comment #5 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Author: zhroma
Date: Tue Apr 23 12:53:43 2019
New Revision: 270511
URL: https://gcc.gnu.org/viewcvs?rev=270511&root=gcc&view=rev
Log:
modulo-sched: fix branch scheduling issue (PR84032)
PR rtl-optimization/84032
* modulo-sched.c (ps_insn_find_column): Change condition so that
branch will always be the last insn in a row inside partial
schedule.
testsuite:
PR rtl-optimization/84032
* gcc.dg/pr84032.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr84032.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/modulo-sched.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/90208] [7/8/9 Regression] error: EH landing pad label
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46232
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46232&action=edit
gcc9-pr90208.patch
Untested fix.
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Subject: [Bug rtl-optimization/84032] ICE in optimize_sc, at modulo-sched.c:1064
Date: Tue, 23 Apr 2019 13:00:00 -0000
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Roman Zhuykov <zhroma at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/87979] ICE in compute_split_row at modulo-sched.c:2393
Date: Tue, 23 Apr 2019 13:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87979
--- Comment #3 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Author: zhroma
Date: Tue Apr 23 13:14:57 2019
New Revision: 270512
URL: https://gcc.gnu.org/viewcvs?rev=270512&root=gcc&view=rev
Log:
modulo-sched: prevent division by zero (PR87979)
PR rtl-optimization/87979
* modulo-sched.c (sms_schedule): Start ii value "mii" should
not equal zero.
testsuite:
PR rtl-optimization/87979
* gcc.dg/pr87979.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr87979.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/modulo-sched.c
trunk/gcc/testsuite/ChangeLog
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/88238] libphobos compile problems on Solaris 10
Date: Tue, 23 Apr 2019 13:18:00 -0000
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--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> (In reply to Rainer Orth from comment #0)
[...]
>> *
>>
>> symbol not found: dl_iterate_phdr (libdruntime/.libs/libgdruntime.so)
>>
>> Unlike Solaris 11, dl_iterate_phdr support was only backported to a late
>> Solaris 10 update and even so only lives in libdl, not in libc. Not yet
>> fixed.
>>
>
> So does dlopen and dl_iterate_phdr live in separate libraries? I would have
In Solaris 10, dlopen lives in libc, but is just a filter on ld.so.1
(the runtime linker), while dl_iterate_phdr only exists in libdl.so.1.
In Solaris 11, OTOH, both exist in libc as filter on ld.so.1.
> thought that DRUNTIME_LIBRARIES_DLOPEN would correctly add -ldl to the driver
> spec file.
Since no separate library is needed for dlopen, -ldl isn't added to $LIBS.
This could certainly be fixed by augmenting the autoconf test.
>> *
>>
>> symbol not found: getprogname (libdruntime/.libs/libgdruntime.so)
>>
>> Solaris 10 lacks getprogname or equivalent; for now I'm faking this by just
>> returning "a.out".
>>
>
> There's the following function in rt/dmain2.d
>
> extern (C) string[] rt_args();
>
> Would the basename() of argv[0] be a suitable fallback? Looking at illumos,
Sure. As an initial hack, I even used a hardcoded "a.out".
> they use dlinfo(RTLD_SELF, RTLD_DI_ARGSINFO) and strrchr(argv0, '/').
True, and that dlinfo request already exists in Solaris 10.
>> *
>> symbol not found: posix_memalign
>> (src/.libs/libgphobos.so)
>>
>> Also missing from Solaris 10. I've not yet checked what to do here. One
>> might be able to use pagealign_alloc from gnulib instead?
>
> If the OS version can be obtained from the compiler, same as FBSD_MAJOR, then
Right now, it can't. However, the Studio compilers predefine
__SunOS_RELEASE, and gcc could be changed to mimic that. Of course, the
test could always be made in configure one way or the other and the
outcome used in libdruntime, similarly to OS_Have_Dlpi_Tls_Modid.
> one option would be to provide posix_memalign internally in druntime.
>
> extern(D) int posix_memalign(void** ptr, size_t alignment, size_t size)
> {
> // ...
> }
>
> extern(D) so that it won't conflict with extern(C) function of the same name.
>
> Though whether it is worth the effort, I'm not so sure. As you've said that
> Solaris10 will be removed before.
Exactly: I've had a look at the open issues on Solaris 10. The ones
above can certainly be worked around or avoided some way or another, but
there's a showstopper, I believe: the 64-bit x86 problem worked around
by ld -z relax=transtls also exists on Solaris 10, but the workaround
does not. This means that we're either left with a 32-bit-only Solaris
10/x86 port or one that is only usable with gld. While Solaris 10/SPARC
wouldn't be affected, SPARC is in considerably worse shape right now,
and I'm pretty certain our time would be far better spent fixing Solaris
11 issues: this will benefit way more users. I doubt there are many
considering upgrading to gcc 9 on Solaris 10, let alone trying a new
language.
My suggestion would be to close the PR as WONTFIX. Should there really
be demand, one could still apply Solaris 10 fixes to the GCC 9 branch
after the 9.1.0 release: there's considerable leeway for changes like
this and a new language.
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Subject: [Bug rtl-optimization/87979] ICE in compute_split_row at modulo-sched.c:2393
Date: Tue, 23 Apr 2019 13:18:00 -0000
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--- Comment #4 from Roman Zhuykov <zhroma at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass when member of union passed to copysignf
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
I'll take a look.
>From gcc-bugs-return-641574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 13:41:04 2019
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Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass when member of union passed to copysignf
Date: Tue, 23 Apr 2019 13:41:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Seems to have been "fixed" by the commit to fix PR87369,
Richard, is this something to backport ? Prima-facie , it appears not and we
will need an appropriate fix for the release branches.
>From gcc-bugs-return-641575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 13:51:59 2019
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Subject: [Bug c/90167] invalid example in GCC documentation wrt. effective type rules
Date: Tue, 23 Apr 2019 13:51:00 -0000
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
But you are not accessing as the union type. You do the access with the
type of one of its members. And that is UB.
The part of the standard you quote is about things like
union a_union f(double *p) { return *(union a_union *)p; }
>From gcc-bugs-return-641576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 14:47:00 2019
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
Date: Tue, 23 Apr 2019 14:47:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I've been thinking about something like:
--- gcc/c/c-format.c.jj 2019-02-26 00:43:18.000000000 +0100
+++ gcc/c/c-format.c 2019-04-23 16:44:54.552064471 +0200
@@ -1060,7 +1060,7 @@ static void check_format_types (const su
vec<location_t> *arglocs);
static void format_type_warning (const substring_loc &fmt_loc,
location_t param_loc,
- format_wanted_type *, tree,
+ format_wanted_type *, tree, tree,
tree,
const format_kind_info *fki,
int offset_to_type_start,
@@ -3109,7 +3109,7 @@ check_format_types (const substring_loc
if (!cur_param)
{
format_type_warning (fmt_loc, UNKNOWN_LOCATION, types, wanted_type,
- NULL, fki, offset_to_type_start,
+ NULL, NULL, fki, offset_to_type_start,
conversion_char);
continue;
}
@@ -3197,8 +3197,8 @@ check_format_types (const substring_loc
}
else
{
- format_type_warning (fmt_loc, param_loc,
- types, wanted_type, orig_cur_type, fki,
+ format_type_warning (fmt_loc, param_loc, types, wanted_type,
+ orig_cur_type, NULL, fki,
offset_to_type_start, conversion_char);
break;
}
@@ -3268,7 +3268,7 @@ check_format_types (const substring_loc
continue;
/* Now we have a type mismatch. */
format_type_warning (fmt_loc, param_loc, types,
- wanted_type, orig_cur_type, fki,
+ wanted_type, orig_cur_type, cur_param, fki,
offset_to_type_start, conversion_char);
}
}
@@ -3339,7 +3339,7 @@ test_get_modifier_for_format_len ()
Wformat type errors where the argument has type ARG_TYPE. */
static bool
-matching_type_p (tree spec_type, tree arg_type)
+matching_type_p (tree spec_type, tree arg_type, tree cur_param)
{
gcc_assert (spec_type);
gcc_assert (arg_type);
@@ -3353,14 +3353,29 @@ matching_type_p (tree spec_type, tree ar
spec_type = TYPE_CANONICAL (spec_type);
arg_type = TYPE_CANONICAL (arg_type);
+ if (spec_type == arg_type)
+ return true;
+
if (TREE_CODE (spec_type) == INTEGER_TYPE
&& TREE_CODE (arg_type) == INTEGER_TYPE
&& (TYPE_UNSIGNED (spec_type)
? spec_type == c_common_unsigned_type (arg_type)
: spec_type == c_common_signed_type (arg_type)))
- return true;
+ {
+ if (!warn_format_signedness)
+ return true;
+ if (TYPE_UNSIGNED (spec_type)
+ && cur_param != NULL_TREE
+ && TREE_CODE (cur_param) == NOP_EXPR)
+ {
+ tree t = TREE_TYPE (TREE_OPERAND (cur_param, 0));
+ if (TYPE_UNSIGNED (t)
+ && spec_type == lang_hooks.types.type_promotes_to (t))
+ return true;
+ }
+ }
- return spec_type == arg_type;
+ return false;
}
/* Subroutine of get_format_for_type.
@@ -3380,7 +3395,7 @@ matching_type_p (tree spec_type, tree ar
static char *
get_format_for_type_1 (const format_kind_info *fki, tree arg_type,
- char conversion_char)
+ tree cur_param, char conversion_char)
{
gcc_assert (arg_type);
@@ -3402,7 +3417,7 @@ get_format_for_type_1 (const format_kind
const format_type_detail *ftd = &spec->types[i];
if (!ftd->type)
continue;
- if (matching_type_p (*ftd->type, effective_arg_type))
+ if (matching_type_p (*ftd->type, effective_arg_type, cur_param))
{
const char *len_modifier
= get_modifier_for_format_len (fki->length_char_specs,
@@ -3439,7 +3454,7 @@ get_format_for_type_1 (const format_kind
static char *
get_format_for_type (const format_kind_info *fki, tree arg_type,
- char conversion_char)
+ tree cur_param, char conversion_char)
{
gcc_assert (arg_type);
gcc_assert (conversion_char);
@@ -3447,13 +3462,14 @@ get_format_for_type (const format_kind_i
/* First pass: look for a format_char_info containing CONVERSION_CHAR
If we find one, then presumably the length modifier was incorrect
(or absent). */
- char *result = get_format_for_type_1 (fki, arg_type, conversion_char);
+ char *result = get_format_for_type_1 (fki, arg_type, cur_param,
+ conversion_char);
if (result)
return result;
/* Second pass: we didn't find a match for CONVERSION_CHAR, so try
matching just on the type. */
- return get_format_for_type_1 (fki, arg_type, '\0');
+ return get_format_for_type_1 (fki, arg_type, cur_param, '\0');
}
/* Attempt to get a string for use as a replacement fix-it hint for the
@@ -3489,7 +3505,7 @@ get_format_for_type (const format_kind_i
static char *
get_corrected_substring (const substring_loc &fmt_loc,
format_wanted_type *type, tree arg_type,
- const format_kind_info *fki,
+ tree cur_param, const format_kind_info *fki,
int offset_to_type_start, char conversion_char)
{
/* Attempt to provide hints for argument types, but not for field widths
@@ -3554,7 +3570,8 @@ get_corrected_substring (const substring
(length modifier and conversion char), based on ARG_TYPE and
CONVERSION_CHAR.
In the above example, this would be "ld". */
- char *format_for_type = get_format_for_type (fki, arg_type,
conversion_char);
+ char *format_for_type = get_format_for_type (fki, arg_type, cur_param,
+ conversion_char);
if (!format_for_type)
{
free (prefix);
@@ -3656,7 +3673,7 @@ class range_label_for_format_type_mismat
precision"), the placement in the format string, a possibly more
friendly name of WANTED_TYPE, and the number of pointer dereferences
are taken from TYPE. ARG_TYPE is the type of the actual argument,
- or NULL if it is missing.
+ or NULL if it is missing. CUR_PARAM is the actual argument tree.
OFFSET_TO_TYPE_START is the offset within the execution-charset encoded
format string to where type information begins for the conversion
@@ -3683,6 +3700,7 @@ format_type_warning (const substring_loc
location_t param_loc,
format_wanted_type *type,
tree wanted_type, tree arg_type,
+ tree cur_param,
const format_kind_info *fki,
int offset_to_type_start,
char conversion_char)
@@ -3723,7 +3741,7 @@ format_type_warning (const substring_loc
/* Get a string for use as a replacement fix-it hint for the range in
fmt_loc, or NULL. */
char *corrected_substring
- = get_corrected_substring (fmt_loc, type, arg_type, fki,
+ = get_corrected_substring (fmt_loc, type, arg_type, cur_param, fki,
offset_to_type_start, conversion_char);
format_string_diagnostic_t diag (fmt_loc, &fmt_label, param_loc,
¶m_label,
corrected_substring);
@@ -4285,7 +4303,7 @@ assert_format_for_type_streq (const loca
gcc_assert (expected_format);
gcc_assert (type);
- char *actual_format = get_format_for_type (fki, type, conversion_char);
+ char *actual_format = get_format_for_type (fki, type, NULL,
conversion_char);
ASSERT_STREQ_AT (loc, expected_format, actual_format);
free (actual_format);
}
but that actually suggests %o instead of %u, I'd say if one writes %d or %i
then %u is a better suggestion.
>From gcc-bugs-return-641577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 14:54:39 2019
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Subject: [Bug middle-end/90191] [9 regression] incorrect -Wformat-overflow with --param max-jump-thread-duplication-stmts\x17
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This particular warning is a late warning during optimizations, and as such has
the issues other late warnings have, various false positives, sometimes more,
sometimes less depending on how much jump threading is done; in some cases more
jump threading causes more false positives, in other cases fewer.
>From gcc-bugs-return-641578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 14:57:30 2019
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Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass when member of union passed to copysignf
Date: Tue, 23 Apr 2019 14:57:00 -0000
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--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Ramana Radhakrishnan from comment #3)
> Seems to have been "fixed" by the commit to fix PR87369,
>
> Richard, is this something to backport ? Prima-facie , it appears not and we
> will need an appropriate fix for the release branches.
Given that the patch for PR87369 eliminates the ICE, it's probably preferable
for backporting to a separate patch that is only used on the release branches.
That patch has now been soaking on trunk for a while now, so is likely to be
pretty safe.
I am a bit worried however, that the patch papers over a likely trunk ICE that
isn't really fixed. It would be nice to investigate further if some additional
mitigation is warranted.
>From gcc-bugs-return-641579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 15:09:22 2019
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Subject: [Bug c++/90172] [9 Regression] ICE: Segmentation fault (in contains_struct_check)
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What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This used to be accepted before r251433, which started rejecting it.
Before r257018, the diagnostics has been:
pr90172.C: In instantiation of ‘fooV(Ts ...) [with Ts = {const char*, int,
double, char, float, short int, unsigned int}]::<lambda(auto:1 ...)> [with
auto:1 = {fooV(Ts ...) [with Ts = {const char*, int, double, char, float, short
int, unsigned int}]::<lambda(auto:1 ...)>, const char*, int, double, char,
float, short int, unsigned int}]’:
pr90172.C:8:13: required from ‘int fooV(Ts ...) [with Ts = {const char*, int,
double, char, float, short int, unsigned int}]’
pr90172.C:13:65: required from here
pr90172.C:3:10: error: use ‘...’ to expand argument pack
auto M = [](decltype(a) ... b) -> void {
^
pr90172.C:5:12: error: unable to deduce lambda return type from ‘M’
return M;
^
but in r257018 and onwards:
pr90172.C: In instantiation of ‘int fooV(Ts ...) [with Ts = {const char*, int,
double, char, float, short int, unsigned int}]’:
pr90172.C:13:65: required from here
pr90172.C:3:10: error: expansion pattern ‘decltype (#‘nontype_argument_pack’
not supported by dump_expr#<expression error>)’ contains no argument packs
auto M = [](decltype(a) ... b) -> void {
^
and finally starting with r268377 we also ICE during error recovery.
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Subject: [Bug d/90130] gdc.test/runnable/test12.d FAILs
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
I think it should be done in r270485.
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Subject: [Bug d/90079] SEGV in _aaKeys, _aaValues on 32-bit SPARC
Date: Tue, 23 Apr 2019 15:20:00 -0000
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--- Comment #5 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Tue Apr 23 15:19:55 2019
New Revision: 270514
URL: https://gcc.gnu.org/viewcvs?rev=270514&root=gcc&view=rev
Log:
PR d/90079
libphobos: Fix SEGV in _aaKeys, _aaValues on 32-bit SPARC
Merges upstream druntime b43203a1
Reviewed-on: https://github.com/dlang/druntime/pull/2572
Modified:
trunk/libphobos/libdruntime/MERGE
trunk/libphobos/libdruntime/object.d
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Subject: [Bug c++/78940] [missed optimization] Useless guard variable in thread_local defaulted constructor
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--- Comment #4 from Avi Kivity <avi@cloudius-systems.com> ---
Since constexpr constructors do send the variable into the .data (or .tls)
section, perhaps gcc can attempt to evaluate the initializer as if it (and any
functions it calls) was marked constexpr. If it fails it can emit the guard and
initialization calls, but if it succeeds, we save some runtime to check those
guards.
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Subject: [Bug c++/90172] [9 Regression] ICE: Segmentation fault (in contains_struct_check)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, I guess the rejects-valid part is a P2 8/9 regression (if the testcase is
really valid) and the ICE is error recovery regression for that (9 only).
For the latter, I guess something like:
--- gcc/cp/pt.c.jj 2019-04-22 16:03:23.000000000 +0200
+++ gcc/cp/pt.c 2019-04-23 17:21:01.898950417 +0200
@@ -18869,7 +18869,8 @@ tsubst_copy_and_build (tree t,
/* We aren't going to do normal overload resolution, so force the
template-id to resolve. */
function = resolve_nondeduced_context (function, complain);
- for (unsigned i = 0; i < nargs; ++i)
+ unsigned int n_call_args = call_args->length ();
+ for (unsigned i = 0; i < n_call_args; ++i)
{
/* In a thunk, pass through args directly, without any
conversions. */
@@ -18881,9 +18882,10 @@ tsubst_copy_and_build (tree t,
if (thisarg)
{
/* Shift the other args over to make room. */
- vec_safe_push (call_args, (*call_args)[nargs-1]);
- for (int i = nargs-1; i > 0; --i)
- (*call_args)[i] = (*call_args)[i-1];
+ tree last_arg = (*call_args)[n_call_args - 1];
+ vec_safe_push (call_args, last_arg);
+ for (int i = n_call_args - 1; i > 0; --i)
+ (*call_args)[i] = (*call_args)[i - 1];
(*call_args)[0] = thisarg;
}
ret = build_call_a (function, call_args->length (),
could do the job, nargs doesn't take into account if there are more arguments
in call_args due to some pack expansion and also the vec_safe_push is broken
because (*call_args)[nargs-1] is just a reference and trying to push it if it
needs to reallocate is broken.
I have no idea if n_call_args could be 0 and thisarg non-NULL, if yes, we need
to just vec_safe_push (call_args, thisarg); in that case instead of moving
anything.
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Subject: [Bug c++/90172] [9 Regression] ICE: Segmentation fault (in contains_struct_check)
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
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Subject: [Bug c++/90212] [8/9 Regression] by-ref capture of constexpr class object rejected
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.4
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Subject: [Bug target/90204] [8/9 Regression] C code is optimized worse than C++
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-23
CC| |hjl.tools at gmail dot com,
| |jakub at gcc dot gnu.org,
| |uros at gcc dot gnu.org
Component|c |target
Target Milestone|--- |8.4
Summary|[8 Regression] C code is |[8/9 Regression] C code is
|optimized worse than C++ |optimized worse than C++
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r257505. A smaller regression happened already earlier with
r254855. Before the latter, we emitted:
pushq %rbp
movq %rdi, %rax
movq %rsp, %rbp
andq $-64, %rsp
vmovdqu32 16(%rbp), %zmm1
vpaddd 80(%rbp), %zmm1, %zmm0
vmovdqa64 %zmm0, -64(%rsp)
vmovdqa64 -64(%rsp), %xmm2
vmovdqa64 -48(%rsp), %xmm3
vmovdqa64 -32(%rsp), %xmm4
vmovdqa64 -16(%rsp), %xmm5
vmovups %xmm2, (%rdi)
vmovups %xmm3, 16(%rdi)
vmovups %xmm4, 32(%rdi)
vmovups %xmm5, 48(%rdi)
vzeroupper
leave
ret
r254855 then changed it into:
pushq %rbp
movq %rsp, %rbp
andq $-32, %rsp
movq %rdi, %rax
vmovdqu32 16(%rbp), %ymm2
vpaddd 80(%rbp), %ymm2, %ymm0
vmovq %xmm0, %rdx
vmovdqa64 %ymm0, -64(%rsp)
vmovdqu32 48(%rbp), %ymm3
vpaddd 112(%rbp), %ymm3, %ymm0
vmovdqa64 %ymm0, -32(%rsp)
movq %rdx, (%rdi)
movq -56(%rsp), %rdx
movq %rdx, 8(%rdi)
movq -48(%rsp), %rdx
movq %rdx, 16(%rdi)
movq -40(%rsp), %rdx
movq %rdx, 24(%rdi)
vmovq %xmm0, 32(%rax)
movq -24(%rsp), %rdx
movq %rdx, 40(%rdi)
movq -16(%rsp), %rdx
movq %rdx, 48(%rdi)
movq -8(%rsp), %rdx
movq %rdx, 56(%rdi)
vzeroupper
leave
ret
After the r257505 we seem to be versioning for alignment or so, that can't be
right for a loop with just 16 iterations.
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Subject: [Bug inline-asm/90181] Feature request: provide a way to explicitly select specific named registers in constraints
Date: Tue, 23 Apr 2019 15:57:00 -0000
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to nfxjfg from comment #6)
> Yes, it's clear that that the constraint can't be _just_ the register name,
> since they'll clash with builtin constraints now or with future
> architectures (which may add arbitrary register names). The proposed
> "*registername" is pretty nice, though. Having this would be great.
Hrm, "*" already has a meaning with current GCC (it essentially is ignored
in inline asm)... It might be better to have some new syntax that gives an
error with older GCC.
> I didn't find a RISC-V builtin for ecall (maybe I looked in the wrong
> place). That wouldbn't be sufficient anyway.
Right, you would need a builtin for every calling convention for syscalls.
The aren't too many of those though?
> Another situation where I
> wanted to specify many fixed register constraints was a piece of inline code
> that did some syscalls without touching the stack (it needed all inputs as
> registers, and in specific registers, and have some registers for free use
> by the asm code itself).
A biggish piece of asm like that might be better as actual assembler code
than as inline asm, you may want to consider that?
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Subject: [Bug debug/90197] [8/9 Regression] Cannot step through simple loop at -O -g
Date: Tue, 23 Apr 2019 16:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This changed with r255569.
Using -gno-statement-frontiers helps here even with recent-ish trunk.
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Subject: [Bug tree-optimization/90078] [7/8 Regression] ICE with deep templates caused by overflow
Date: Tue, 23 Apr 2019 16:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 Regression] ICE with |[7/8 Regression] ICE with
|deep templates caused by |deep templates caused by
|overflow [PATCH] |overflow
Known to fail|9.0 |
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug target/87532] bad results from vec_extract(unsigned char, foo) dependent upon function inline
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kelvin at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #20 from kelvin at gcc dot gnu.org ---
Patch has been committed to trunk and backported to gcc8 and gcc7.
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Subject: [Bug c++/90212] [8/9 Regression] by-ref capture of constexpr class object rejected
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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>From gcc-bugs-return-641592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 16:32:20 2019
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #57 from Jeffrey A. Law <law at redhat dot com> ---
So what's actually left to do with this BZ? ie, what tests are still
regressing?
>From gcc-bugs-return-641593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 16:35:05 2019
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Subject: [Bug c++/90205] Wformat-signedness detects %d and suggests %d fixit hint
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--- Comment #6 from Jonny Grant <jg at jguk dot org> ---
Wondering if it is also worth the message making clear the type was promoted?
eg:
<source>:5:14: warning: format '%d' expects argument of type 'int', but
argument 2 has type 'float' automatically promoted to 'double', for which '%f'
is required [-Wformat=]
5 | printf("%d", i);
| ~^ ~
| | |
| int float
| %f
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #58 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If we don't want to go with #c35 at least for GCC 9, would the #c44 patch be
still useful without it (does it ever trigger say on the kernel where it didn't
trigger before)?
>From gcc-bugs-return-641595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 16:58:40 2019
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Subject: [Bug debug/90197] [8/9 Regression] Cannot step through simple loop at -O -g
Date: Tue, 23 Apr 2019 16:58:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For the for loop, we emit a DEBUG_BEGIN_STMT, which maps to DWARF:
is_stmt
'A boolean indicating that the current instruction is a recommended breakpoint
location. A recommended breakpoint location is intended to “represent†a line,
a statement and/or a semantically distinct subpart of a statement.'
I would think that for a C/C++ normal for loop we should emit a recommanded
breakpoint location not just at the start of the whole statement (== at the
start of the init expression), but also at the start of the increment
expression and maybe also at the start of the condition (though not sure about
that, perhaps it is enough to have just one on the increment expression and
cover the condition through the recommended breakpoint location at the start of
the whole for loop and before the increment expression.
Wonder about other loop constructs too.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90197] [8/9 Regression] Cannot step through simple loop at -O -g
Date: Tue, 23 Apr 2019 17:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90197
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
__attribute__((noipa))
void
test (unsigned int *dst, unsigned int base, int count)
{
int i = 0;
while (i < count)
dst[i++] = (base += 15);
}
int
main (void)
{
unsigned int dst[100];
test (dst, 0x4000, 100);
}
and
__attribute__((noipa))
void
test (unsigned int *dst, unsigned int base, int count)
{
int i = 0;
do
dst[i++] = (base += 15);
while (i < count);
}
int
main (void)
{
unsigned int dst[100];
test (dst, 0x4000, 100);
}
show that too. For the do while loop, not sure if we shouldn't have something
also one recommended location at the start of the do/while loop on do line,
then of course in the body and then on the while condition. For while loop at
the start of the condition. Also, in C++ we have range-for loops that need
some thinking too.
>From gcc-bugs-return-641597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 17:11:32 2019
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From: "vegard.nossum at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/90209] codegen regression (x < 0 ? -x : x) results in branch instead of single instruction on x86_64
Date: Tue, 23 Apr 2019 17:11:00 -0000
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Vegard Nossum <vegard.nossum at oracle dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #2 from Vegard Nossum <vegard.nossum at oracle dot com> ---
x < 0 will be false for x == -0. and therefore the return value will be -0.,
which it won't be with just the "andpd". Closing as invalid
>From gcc-bugs-return-641598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 17:13:18 2019
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From: "vittorio.romeo at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90215] New: ICE with lambda in fold expression over comma and assignment
Date: Tue, 23 Apr 2019 17:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90215
Bug ID: 90215
Summary: ICE with lambda in fold expression over comma and
assignment
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vittorio.romeo at outlook dot com
Target Milestone: ---
The following code
#include <tuple>
template <class T>
struct X
{
template <class F>
void f(F f)
{
f(0);
}
};
template <class... Xs>
void bug(X<Xs>... xs)
{
std::tuple<Xs...> t;
std::apply([&](auto&... ys)
{
(xs.f([&](auto y)
{
ys = y;
}), ...);
}, t);
}
int main()
{
bug(X<int>{});
}
produces an ICE with g++ trunk (version 9.0.1 20190422):
<source>:22:16: internal compiler error: in tsubst_copy, at cp/pt.c:15551
22 | ys = y;
| ~~~^~~
The bug can be reproduced on godbolt.org here:
https://gcc.godbolt.org/z/NNLI5p
>From gcc-bugs-return-641599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 17:17:44 2019
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Subject: [Bug c++/90215] ICE with lambda in fold expression over comma and assignment
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-23
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-641600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 17:24:56 2019
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Subject: [Bug c++/90215] ICE with lambda in fold expression over comma and assignment
Date: Tue, 23 Apr 2019 17:24:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code,
| |needs-reduction
Target Milestone|--- |8.4
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The ICE started with r251433. Before:
90215.C: In lambda function:
90215.C:22:20: error: parameter packs not expanded with ‘...’:
90215.C:22:20: note: ‘__ys’
>From gcc-bugs-return-641601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 18:16:43 2019
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From: "Casey at Carter dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86044] noexcept(false) of constexpr member function ignored
Date: Tue, 23 Apr 2019 18:16:00 -0000
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Casey Carter <Casey at Carter dot net> changed:
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----------------------------------------------------------------------------
CC| |Casey at Carter dot net
--- Comment #1 from Casey Carter <Casey at Carter dot net> ---
In C++14, this is conforming behavior per N4140 [expr.unary.noexcept]/3:
"""
3. The result of the noexcept operator is false if in a potentially-evaluated
context the expression would contain
3.1 - a potentially-evaluated call to a function, member function, function
pointer, or member function pointer that does not have a non-throwing
exception-specification, unless the call is a constant expression,
[...]
"""
In C++17 and later, it is not conforming per [expr.unary.noexcept]/3:
"""
3 The result of the noexcept operator is true unless the expression is
potentially-throwing ([except.spec]).
""
and [except.spec]/6 which defines "potentially-throwing" and includes no
mention of constant expressions (I won't duplicate the full text here).
>From gcc-bugs-return-641602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 18:17:37 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90197] [8/9 Regression] Cannot step through simple loop at -O -g
Date: Tue, 23 Apr 2019 18:17:00 -0000
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--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
What's confusing to me is that, as far as I know, GDB pays no attention to
is_stmt yet.
So I think we should focus on what, if any, changes to the line number program
are brought about by enabling or disabling the SFN option.
That said, markers at increments and conditions, besides loop headers, is
definitely something we should have. I'm more than surprised they aren't
there.
>From gcc-bugs-return-641603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 18:40:06 2019
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Subject: [Bug c++/86044] noexcept(false) of constexpr member function ignored
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Resolved by my r270320.
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Subject: [Bug rtl-optimization/87871] [9 Regression] testcases fail after r265398 on arm
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--- Comment #59 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #58)
> If we don't want to go with #c35 at least for GCC 9, would the #c44 patch be
> still useful without it (does it ever trigger say on the kernel where it
> didn't trigger before)?
The patch in comment 44 is obviously good, it improves the size by 0.090%
as noted (this is a kernel build, multi_v5_defconfig iirc).
I'd say it is perfectly safe for GCC 9, but I'm not an Arm maintainer :-)
>From gcc-bugs-return-641605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 19:08:28 2019
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Subject: [Bug translation/90119] Merge translation msgids that only differ in placeholders
Date: Tue, 23 Apr 2019 19:08:00 -0000
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--- Comment #6 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Martin Liška from comment #5)
> Thank you Roland for working on that. Can you please integrate your script
> with:
> contrib/check-internal-format-escaping.py
No, I cannot. Integrating it doesn't make sense. In bug 90176 I posted the most
recent version of my work. Reading the gcc.pot file line by line doesn't make
sense anymore, since that prevents the more interesting linter checks (such as
the one checking for structurally equivalent msgids) from working.
I converted the existing program to using polib exactly for the purpose of
having more advanced checks than are possible with the current code base.
To the best of my knowledge I have preserved all current linter checks.
>From gcc-bugs-return-641606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 19:19:27 2019
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Subject: [Bug c++/68092] [C++1z] error: Two symbols with same comdat_group are not linked by the same_comdat_group list.
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S. Davis Herring <herring at lanl dot gov> changed:
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--- Comment #7 from S. Davis Herring <herring at lanl dot gov> ---
Created attachment 46233
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46233&action=edit
ICE output from variable template test
This simple test case produces a similar ICE (with current trunk at Compiler
Explorer):
int i;
template<auto> extern const int v=i++;
void f();
const int j=v<f>;
int g() {
void f();
return v<f>;
}
Making v have internal linkage makes it go away. If this should be a separate
bug, please let me know.
>From gcc-bugs-return-641607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 19:24:58 2019
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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--- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
It ended up being a little more work, as the proposed patch had a bug in it.
But it's now done in r270514.
>From gcc-bugs-return-641608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 20:16:06 2019
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonny Grant from comment #6)
> Wondering if it is also worth the message making clear the type was promoted?
>
> eg:
>
> <source>:5:14: warning: format '%d' expects argument of type 'int', but
> argument 2 has type 'float' automatically promoted to 'double', for which
> '%f' is required [-Wformat=]
>
> 5 | printf("%d", i);
> | ~^ ~
> | | |
> | int float
> | %f
Maybe, but the message would be getting pretty long by that point...
>From gcc-bugs-return-641609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 20:18:20 2019
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Subject: [Bug translation/90176] diagnostics should generally contain underscore only inside quotes
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Roland Illig <roland.illig at gmx dot de> changed:
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is obsolete| |
--- Comment #4 from Roland Illig <roland.illig at gmx dot de> ---
Created attachment 46234
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46234&action=edit
linter uses polib and checks for several new inconsistencies
>From gcc-bugs-return-641610-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 20:35:21 2019
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Subject: [Bug translation/90119] Merge translation msgids that only differ in placeholders
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--- Comment #7 from Roland Illig <roland.illig at gmx dot de> ---
I didn't want to sound that harsh in my previous comment.
What I wanted to say is: to make the linter reliable and be able to handle the
full syntax of .po files, it's better to use an exising library that is
well-tested instead of parsing .po files ad-hoc using regular expressions and
raw string functions.
That way the code of the linter becomes easy to read since it uses the standard
terminology of the .po structures, and it is easy to access all gettext
features (such as plurals or other formats) without modifying the parser code.
It also becomes easier to add new checks to the linter.
The diagnostics of the linter now follow more closely the GCC Guidelines for
Diagnostics, by offering guidance and saying what the actual possible problem
is, instead of only pointing to the problematic message.
This of course requires a bit more code than the current linter.
I have checked that my rewrite preserves all existing features of the linter. I
don't think adding new features to the current architecture of the linter makes
sense since it requires more work than absolutely necessary. To add a new
linter check, it shouldn't be necessary to modify any .po file format parser.
Therefore I think replacing the current linter with the latest suggested code
from bug 90176 actually makes sense.
>From gcc-bugs-return-641611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 20:38:20 2019
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Subject: [Bug c++/86044] noexcept(false) of constexpr member function ignored
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, this was a duplicate of PR 87603.
>From gcc-bugs-return-641612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 21:00:59 2019
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Tavian Barnes <tavianator at gmail dot com> changed:
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--- Comment #8 from Tavian Barnes <tavianator at gmail dot com> ---
Maybe "argument 2 has type 'double' (promoted from 'float')"?
>From gcc-bugs-return-641613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 21:43:29 2019
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Subject: [Bug c++/90216] New: Stack Pointer decrementing even when not loading extra data to stack.
Date: Tue, 23 Apr 2019 21:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90216
Bug ID: 90216
Summary: Stack Pointer decrementing even when not loading extra
data to stack.
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: stevexiong98 at hotmail dot com
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Hi,
Using ARM GCC 8.2, when I instantiate an object the corresponding Assembly
instructions involve a decrementing, then incrementing of the stack pointer.
However, no values are being transferred between the registers and the empty
stack space.
Please check out this link for details, lines 5 and 7 in the Assembly panel
show how the stack pointer is decremented/incremented unnecessarily.
https://godbolt.org/z/h-H7Ox
In the C++ panel when you comment out line 53 and uncomment the line below, the
Assembly instructions involving the stack pointer disappear. The same is true
if you uncomment just line 55.
Can you please explain why the stack pointer inc/dec operations are not
optimized out in the first line of code (line 53)? Can you please try to
release a patch where this unnecessary stack pointer inc/dec is no longer an
issue?
Thanks
>From gcc-bugs-return-641614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 21:57:18 2019
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Subject: [Bug middle-end/90216] Stack Pointer decrementing even when not loading extra data to stack.
Date: Tue, 23 Apr 2019 21:57:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-23
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed, part of the problem is union is forced to memory early on but then
optimized out but the object still exist in memory even though it is dead.
I am working on an optimization which improves this by the lowering of
bit-fields. But it won't go in until post GCC 9 (released next year).
>From gcc-bugs-return-641615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 21:59:18 2019
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From: "roland.illig at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug translation/79183] Hard coded plurals in gimple-ssa-sprintf.c:2050
Date: Tue, 23 Apr 2019 21:59:00 -0000
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--- Comment #9 from Roland Illig <roland.illig at gmx dot de> ---
Is there already someone who wants to fix the remaining messages?
Jakub, you fixed some of them already in
https://gcc.gnu.org/viewcvs?rev=258154&root=gcc&view=rev in March 2018.
There are still some messages that use fmtwarn instead of fmtwarn_n and still
contain "%wu bytes" or its close relative "%wu or more bytes".
Another even trickier message is "between %wu and %wu bytes". This one uses a
range of numbers, and in Arabic the rules for the correct word form are quite
numerous:
https://www.unicode.org/cldr/charts/33/supplemental/language_plural_rules.html#ar
If GCC wants to be the project demonstrating best practices in translation, it
should even handle this case correctly. I'm not sure though whether gettext
supports this at all.
Current state:
#c0 is fixed
#c1 is fixed in 2 out of 3 cases
#c6 is fixed
>From gcc-bugs-return-641616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 22:21:22 2019
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Subject: [Bug translation/90176] diagnostics should generally contain underscore only inside quotes
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Roland Illig <roland.illig at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #46234|0 |1
is obsolete| |
--- Comment #5 from Roland Illig <roland.illig at gmx dot de> ---
Created attachment 46235
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46235&action=edit
linter with check for bug 90117
>From gcc-bugs-return-641617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 22:21:31 2019
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Subject: [Bug translation/90117] Replace %<%s%> with %qs
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--- Comment #2 from Roland Illig <roland.illig at gmx dot de> ---
(In reply to Martin Liška from comment #1)
> Makes sense, I'll integrate that to our linter.
I've already integrated that into the linter, see the latest attachment in bug
90176.
>From gcc-bugs-return-641618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 23 22:22:27 2019
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From: "stevexiong98 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90217] New: Greater optimization of C++ Code
Date: Tue, 23 Apr 2019 22:22:00 -0000
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Bug ID: 90217
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Hi,
This is not so much a bug, but more of an enhancement. There are 2 pieces of
code I have listed below which should translate to identical assembly
instructions at high levels of compiler optimization (level 3) but currently do
not.
https://godbolt.org/z/Zn7FMK
https://godbolt.org/z/wB8eZd
Using ARM GCC 8.2, the code in the second link involves the stack pointer and
extra load/store operations to the newly-created stack space. There are more
assembly instructions in link 2's code than in link 1's code.
However, in Godbolt if you switch the compiler to Clang, at optimization 3 both
pieces of code manage to compile down to the same minimal Assembly
instructions.
Switching the compiler to x86-64 GCC (trunk), the code in the second link also
has a few extra operations compared the first link's code.
Is it possible to set ARM GCC and x86-64 GCC to a particular optimization
setting that allows both links' code to have matching assembly instructions? If
not, is it possible that in a future release, both compilers could apply enough
optimizations so that the assembly in link 1 matches link 2?
Thanks
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Subject: [Bug d/88431] link errors on build
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--- Comment #4 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Apr 24 02:04:04 2019
New Revision: 270531
URL: https://gcc.gnu.org/viewcvs?rev=270531&root=gcc&view=rev
Log:
libphobos: Fix link build errors when compiling with unsupported options
The first compilation test to get baseline warnings was getting more
messages due to a missing object.d file, compared to later configure
tests where libphobos is in the include paths.
Because there must always be an object module during compilation, let
the tests themselves be an empty object module instead.
libphobos/ChangeLog:
2019-04-24 Iain Buclaw <ibuclaw@gdcproject.org>
PR d/88431
* configure: Regenerate.
* m4/libtool.m4 (lt_simple_compile_test_code): Update to not have
dependencies on libphobos.
(lt_simple_link_test_code): Likewise.
(GDCFLAGS): Don't override for D compiler tests.
Modified:
trunk/libphobos/ChangeLog
trunk/libphobos/configure
trunk/libphobos/m4/libtool.m4
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Fixed in r270531.
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Tests that were problematic on bigendian were fixed in r270523.
I can't see any more reported issues, so marking resolved.
>From gcc-bugs-return-641622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 03:12:58 2019
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Subject: [Bug target/90204] [8/9 Regression] C code is optimized worse than C++
Date: Wed, 24 Apr 2019 03:12:00 -0000
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--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
It seems such code generation is r254855's intention.
/* Use 256-bit AVX instructions instead of 512-bit AVX
instructions
4695 in the auto-vectorizer. */
4696 if (ix86_tune_features[X86_TUNE_AVX256_OPTIMAL]
4697 && !(opts_set->x_ix86_target_flags &
OPTION_MASK_PREFER_AVX256))
4698 opts->x_ix86_target_flags |= OPTION_MASK_PREFER_AVX256;
I know there is a frequency reduction issue when many zmm registers are used,
but i don't know what exact situation did r254855 deal with?
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Subject: [Bug fortran/90218] New: [PDT] ICE: tree check: expected array_type, have record_type in gfc_conv_array_initializer, at fortran/trans-array.c:6071
Date: Wed, 24 Apr 2019 03:15:00 -0000
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Bug ID: 90218
Summary: [PDT] ICE: tree check: expected array_type, have
record_type in gfc_conv_array_initializer, at
fortran/trans-array.c:6071
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Created attachment 46236
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Testcase
gfortran-9.0.0-alpha20190421 snapshot (r270485) ICEs, and 8.2 demonstrates a
memory hog when compiling the attached testcase copied from [1]:
% powerpc-e300c3-linux-gnu-gfortran-9.0.0-alpha20190421 -c nag-20180205a.f90
nag-20180205a.f90:21:0:
21 | end
|
internal compiler error: tree check: expected array_type, have record_type in
gfc_conv_array_initializer, at fortran/trans-array.c:6071
0x6a3d1c tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree.c:9900
0x56293c tree_check(tree_node*, char const*, int, char const*, tree_code)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree.h:3176
0x56293c gfc_conv_array_initializer(tree_node*, gfc_expr*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/trans-array.c:6068
0x88a342 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/trans-expr.c:7384
0x88a823 gfc_conv_structure(gfc_se*, gfc_expr*, int)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/trans-expr.c:8286
0x88a317 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/trans-expr.c:7419
0x866499 gfc_emit_parameter_debug_info
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/trans-decl.c:5409
0x866499 gfc_emit_parameter_debug_info
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/trans-decl.c:5341
0x82a652 do_traverse_symtree
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/symbol.c:4166
0x8741b2 gfc_generate_function_code(gfc_namespace*)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/trans-decl.c:6821
0x7f2714 translate_all_program_units
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/parse.c:6134
0x7f2714 gfc_parse_file()
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/parse.c:6337
0x84064e gfc_be_parse_file
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/fortran/f95-lang.c:204
(While my target is powerpc here, the ICE is not target-specific.)
[1]
https://github.com/nncarlson/fortran-compiler-tests/blob/bee34a692422e8c6dba49d3e7ac3fd9629fda068/nag-bugs/nag-20180205a.f90
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Subject: [Bug target/90204] [8/9 Regression] C code is optimized worse than C++
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--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #2)
> It seems such code generation is r254855's intention.
>
> /* Use 256-bit AVX instructions instead of 512-bit AVX
> instructions
> 4695 in the auto-vectorizer. */
> 4696 if (ix86_tune_features[X86_TUNE_AVX256_OPTIMAL]
> 4697 && !(opts_set->x_ix86_target_flags &
> OPTION_MASK_PREFER_AVX256))
> 4698 opts->x_ix86_target_flags |= OPTION_MASK_PREFER_AVX256;
>
> I know there is a frequency reduction issue when many zmm registers are
> used, but i don't know what exact situation did r254855 deal with?
But it should generate assemble like what g++ did which also use ymm instead of
zmm.
>From gcc-bugs-return-641625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 05:23:31 2019
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Subject: [Bug other/44435] gengtype: don't test undefined value after vasprintf failure
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dj at redhat dot com,
| |joseph at codesourcery dot com
--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #6)
> (In reply to joseph@codesourcery.com from comment #5)
> > Subject: Re: gengtype: don't test undefined value after
> > vasprintf failure
> >
> > On Mon, 7 Jun 2010, dj at redhat dot com wrote:
> >
> > > > If the libiberty maintainers won't review the xvasprintf patch,
> > >
> > > I did: http://gcc.gnu.org/ml/gcc-patches/2009-08/msg00589.html
> >
> > That's a review of an older version. The URLs I gave were of a version a
> > different person updated to take account of your original review comments.
>
> Has the updated version been reviewed yet?
Joseph, do you remember what happened with this, if anything?
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Subject: [Bug rtl-optimization/90174] Bad register spill due to top-down allocation order
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--- Comment #3 from Feng Xue <fxue at os dot amperecomputing.com> ---
Created attachment 46237
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46237&action=edit
test case for aarch64
Add another case composed for aarch64.
>From gcc-bugs-return-641627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 06:35:47 2019
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Subject: [Bug c++/90217] Greater optimization of C++ Code
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Please always attach your testcases to bugzilla.
I took a look at the .optimized dump.
First issue is that we fail to simplify
MEM[(union ._1 *)&apart] = 1;
_3 = apart.D.2494.contam_level;
Second issue is that we do not replace the write to the field lobby with a
word-sized write, so the second read is harder to optimize than in the first
issue.
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Subject: [Bug fortran/87127] External function not recognised from within an associate block
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--- Comment #7 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Wed Apr 24 07:27:42 2019
New Revision: 270532
URL: https://gcc.gnu.org/viewcvs?rev=270532&root=gcc&view=rev
Log:
2019-04-24 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87127
* resolve.c (check_host_association): If an external function
is typed but not declared explicitly to be external, change the
old symbol from a variable to an external function.
2019-04-24 Paul Thomas <pault@gcc.gnu.org>
PR fortran/87127
* gfortran.dg/external_procedures_4.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/external_procedures_4.f90
Modified:
branches/gcc-8-branch/gcc/fortran/ChangeLog
branches/gcc-8-branch/gcc/fortran/resolve.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "tbaeder at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90219] New: Wrong source location for "cannot convert to a pointer type" warning
Date: Wed, 24 Apr 2019 07:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90219
Bug ID: 90219
Summary: Wrong source location for "cannot convert to a pointer
type" warning
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: tbaeder at redhat dot com
Target Milestone: ---
Using gcc 8.3.1 and the following sample code:
static int use_float(float *f) {
return (int)*f;
}
// Type your code here, or load an example.
int square(int num) {
float f = 1.0f;
return use_float((float*)f);
}
it prints the following error:
<source>: In function 'square':
<source>:8:5: error: cannot convert to a pointer type
return use_float((float*)f);
^~~~~~
which is highlighting the wrong part of that line. The error message itself
could be improved as well (I forgot to take the address of f of course!) but I
think the cast should be highlighted.
If use_float() is instead called stand-alone and not as part of the return
statment:
int square(int num) {
float f = 1.0f;
use_float((float*)f);
return 1;
}
The source location is slightly better:
<source>: In function 'square':
<source>:8:5: error: cannot convert to a pointer type
use_float((float*)f);
^~~~~~~~~
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90219] Wrong source location for "cannot convert to a pointer type" warning
Date: Wed, 24 Apr 2019 07:56:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-24
Ever confirmed|0 |1
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/90219] Wrong source location for "cannot convert to a pointer type" warning
Date: Wed, 24 Apr 2019 07:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90219
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Timm Bäder from comment #0)
> Using gcc 8.3.1 and the following sample code:
>
> static int use_float(float *f) {
> return (int)*f;
> }
>
> // Type your code here, or load an example.
> int square(int num) {
> float f = 1.0f;
> return use_float((float*)f);
> }
>
> it prints the following error:
>
> <source>: In function 'square':
> <source>:8:5: error: cannot convert to a pointer type
> return use_float((float*)f);
> ^~~~~~
>
> which is highlighting the wrong part of that line. The error message itself
> could be improved as well (I forgot to take the address of f of course!)
Well if you took the address you wouldn't need to cast it to (float*) so I
don't think the diagnostic should try to infer that you wanted to say &f here.
It certainly looks like the code is attempting to do an invalid type
conversion, so the message seems reasonable. The highlighted location is
definitely poor though.
> but
> I think the cast should be highlighted.
>
> If use_float() is instead called stand-alone and not as part of the return
> statment:
>
> int square(int num) {
> float f = 1.0f;
> use_float((float*)f);
> return 1;
> }
>
> The source location is slightly better:
>
> <source>: In function 'square':
> <source>:8:5: error: cannot convert to a pointer type
> use_float((float*)f);
> ^~~~~~~~~
Well it's still just the start of the statement, which is not really any
better.
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Subject: [Bug tree-optimization/90211] [8/9 Regression] ICE: tree check: expected ssa_name, have real_cst in first_readonly_imm_use, at ssa-iterators.h:351
Date: Wed, 24 Apr 2019 08:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90211
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 24 08:13:29 2019
New Revision: 270533
URL: https://gcc.gnu.org/viewcvs?rev=270533&root=gcc&view=rev
Log:
PR tree-optimization/90211
* tree-parloops.c (try_create_reduction_list): Ignore phi arguments
which are not SSA_NAMEs.
* gcc.dg/autopar/pr90211.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/autopar/pr90211.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-parloops.c
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Subject: [Bug tree-optimization/90208] [7/8/9 Regression] error: EH landing pad label
Date: Wed, 24 Apr 2019 08:15:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 24 08:14:50 2019
New Revision: 270534
URL: https://gcc.gnu.org/viewcvs?rev=270534&root=gcc&view=rev
Log:
PR tree-optimization/90208
* tree-cfg.c (remove_bb): Move forced labels from removed bbs
after labels of new_bb, not before them.
* gcc.dg/tsan/pr90208-1.c: New test.
* gcc.dg/tsan/pr90208-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tsan/pr90208-1.c
trunk/gcc/testsuite/gcc.dg/tsan/pr90208-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfg.c
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Subject: [Bug tree-optimization/90208] [7/8 Regression] error: EH landing pad label
Date: Wed, 24 Apr 2019 08:16:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[7/8/9 Regression] error: |[7/8 Regression] error: EH
|EH landing pad label |landing pad label
Known to fail|9.0 |
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 24 Apr 2019 08:16:00 -0000
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--- Comment #80 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 24 08:16:07 2019
New Revision: 270535
URL: https://gcc.gnu.org/viewcvs?rev=270535&root=gcc&view=rev
Log:
PR target/89093
* raise-gcc.c (TARGET_ATTRIBUTE): Define.
(continue_unwind, personality_body, PERSONALITY_FUNCTION): Add
TARGET_ATTRIBUTE.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/raise-gcc.c
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Subject: [Bug tree-optimization/90211] [8 Regression] ICE: tree check: expected ssa_name, have real_cst in first_readonly_imm_use, at ssa-iterators.h:351
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90211
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] ICE: tree |[8 Regression] ICE: tree
|check: expected ssa_name, |check: expected ssa_name,
|have real_cst in |have real_cst in
|first_readonly_imm_use, at |first_readonly_imm_use, at
|ssa-iterators.h:351 |ssa-iterators.h:351
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 9.1+ so far.
>From gcc-bugs-return-641637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 08:30:40 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 24 Apr 2019 08:30:00 -0000
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--- Comment #81 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for Ada as well, only Go left to do.
>From gcc-bugs-return-641638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 08:34:26 2019
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From: "ramana.radhakrishnan at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass when member of union passed to copysignf
Date: Wed, 24 Apr 2019 08:34:00 -0000
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--- Comment #5 from ramana.radhakrishnan at arm dot com <ramana.radhakrishnan at arm dot com> ---
The main reason for the ICE is this bit of code here.
GCC-8 and earlier have this bit of code in the expansion for copysignsf3
..
rtx op2 = lowpart_subreg (V2SFmode, operands[2], SFmode);
..
which looks quite a bit different to the approach taken with copysigndf3 until
your rewrite.
This gets an input in operands[2] which is subreg:SF (reg:SI 100) and then
lower_subreg->simplify_gen_subreg seems to get into a tangle that it can't get
out of. That causes simplify_gen_subreg to get confused and that ends up
returning a Null pointer as it is unable to do the conversion - we then don't
check and thus ICE with a null pointer error.
Having looked at it again this morning my reaction is that while there be
dragons in subreg's of vector modes and such mode casting, the newer rewrite
seems reasonable and is not papering over any underlying modes.
For the release branches, I think backporting your patch (and any followups ,
do you remember any ?) should be fine and we should just do it ./
Ramana
________________________________________
From: rearnsha at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org>
Sent: 23 April 2019 15:57
To: ramana@gcc.gnu.org
Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass
when member of union passed to copysignf
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90075
--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to Ramana Radhakrishnan from comment #3)
> Seems to have been "fixed" by the commit to fix PR87369,
>
> Richard, is this something to backport ? Prima-facie , it appears not and we
> will need an appropriate fix for the release branches.
Given that the patch for PR87369 eliminates the ICE, it's probably preferable
for backporting to a separate patch that is only used on the release branches.
That patch has now been soaking on trunk for a while now, so is likely to be
pretty safe.
I am a bit worried however, that the patch papers over a likely trunk ICE that
isn't really fixed. It would be nice to investigate further if some additional
mitigation is warranted.
--
You are receiving this mail because:
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Subject: [Bug c/90167] invalid example in GCC documentation wrt. effective type rules
Date: Wed, 24 Apr 2019 08:41:00 -0000
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--- Comment #4 from Laszlo Ersek (RH) <lersek at redhat dot com> ---
So one way to define the behavior for the original example (from the gcc docs)
would be:
int f(void) {
double d = 3.0;
union a_union u = *(union a_union *)&d;
return u.i;
}
Thanks.
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Subject: [Bug target/90187] [8/9 Regression] ICE in extract_insn, at recog.c:2304 x86_64
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 24 09:27:14 2019
New Revision: 270537
URL: https://gcc.gnu.org/viewcvs?rev=270537&root=gcc&view=rev
Log:
PR target/90187
* config/i386/i386.c (ix86_expand_sse_fp_minmax): Force if_true into
a register if both if_true and if_false are MEMs.
* g++.target/i386/pr90187.C: New test.
Added:
trunk/gcc/testsuite/g++.target/i386/pr90187.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/90220] std::any_cast misbehaves for function and array types
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2019-04-24
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
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Subject: [Bug libstdc++/90220] New: std::any_cast misbehaves for function and array types
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Bug ID: 90220
Summary: std::any_cast misbehaves for function and array types
Product: gcc
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This valid program fails to compile:
#include <any>
int main() {
std::any a;
std::any_cast<void()>(&a);
}
In file included from a.cc:1:
/home/jwakely/gcc/9/include/c++/9.0.1/any: In instantiation of '_ValueType*
std::any_cast(std::any*) [with _ValueType = void()]':
a.cc:4:27: required from here
/home/jwakely/gcc/9/include/c++/9.0.1/any:544:9: error: invalid static_cast
from type 'void*' to type 'void (*)()'
544 | return static_cast<_ValueType*>(__any_caster<_ValueType>(__any));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The contained value can never be a function type, so any_cast can just return
nullptr if !is_object_v<_ValueType>.
This program compiles but fails the assertion:
#include <any>
#include <assert.h>
#include <typeinfo>
int main()
{
int arr[3];
std::any a(arr);
assert( a.type() == typeid(int*) ); // contained value is decayed
int (*p)[3] = std::any_cast<int[3]>(&a);
assert( p == nullptr );
}
a.out: b.cc:12: int main(): Assertion `p == nullptr' failed.
Aborted (core dumped)
The problem is that __any_caster uses decay_t<_ValueType> to see if the manager
function matches the requested type. That's wrong, because decaying should only
happen on construction, not when accessing the value with any_cast.
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Subject: [Bug libstdc++/90221] New: Resource leak in object
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Bug ID: 90221
Summary: Resource leak in object
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https://github.com/gcc-mirror/gcc/blob/gcc-6_4_0-release/libstdc++-v3/include/bits/shared_ptr_base.h#L646
Is this false positive by coverity ?
Coverity report:
{
633 // _GLIBCXX_RESOLVE_LIB_DEFECTS
634 // 2415. Inconsistency between unique_ptr and shared_ptr
1. Condition __r->get() == NULL, taking false branch.
635 if (__r.get() == nullptr)
636 return;
637
638 using _Ptr = typename unique_ptr<_Tp, _Del>::pointer;
639 using _Del2 = typename conditional<is_reference<_Del>::value,
640 reference_wrapper<typename remove_reference<_Del>::type>,
641 _Del>::type;
642 using _Sp_cd_type
643 = _Sp_counted_deleter<_Ptr, _Del2, allocator<void>, _Lp>;
644 using _Alloc = allocator<_Sp_cd_type>;
645 using _Alloc_traits = allocator_traits<_Alloc>;
646 _Alloc __a;
CID 8655046 (#1 of 1): Resource leak in object (CTOR_DTOR_LEAK)
2. alloc_fn: Calling allocation function allocate. [show details]
3. assign: Assigning: __mem =
std::allocator_traits<std::allocator<std::_Sp_counted_deleter<JCI::MediaBase::IAPVolumeManager
*, std::default_delete<JCI::MediaBase::IAPVolumeManager>, std::allocator<void>,
(__gnu_cxx::_Lock_policy)2> > >::allocate(__a, 1UL).
647 _Sp_cd_type* __mem = _Alloc_traits::allocate(__a, 1);
648 _Alloc_traits::construct(__a, __mem, __r.release(),
649 __r.get_deleter()); // non-throwing
4. assign: Assigning: this->_M_pi = __mem.
5. ctor_dtor_leak: The constructor allocates field _M_pi of
std::__shared_count<(__gnu_cxx::_Lock_policy)2> but the destructor and whatever
functions it calls do not free it.
650 _M_pi = __mem;
651 }
652
653 // Throw bad_weak_ptr when __r._M_get_use_count() == 0.
654 explicit __shared_count(const __weak_count<_Lp>& __r);
655
656 // Does not throw if __r._M_get_use_count() == 0, caller must check.
657 explicit __shared_count(const __weak_count<_Lp>& __r, std::nothrow_t);
658
A1. destructor: This is the destructor implementation.
659 ~__shared_count() noexcept
660 {
661 if (_M_pi != nullptr)
662 _M_pi->_M_release();
663 }
664
665 __shared_count(const __shared_count& __r) noexcept
666 : _M_pi(__r._M_pi)
667 {
668 if (_M_pi != 0)
669 _M_pi->_M_add_ref_copy();
670 }
671
672 __shared_count&
673 operator=(const __shared_count& __r) noexcept
674 {
675 _Sp_counted_base<_Lp>* __tmp = __r._M_pi;
676 if (__tmp != _M_pi)
677 {
678 if (__tmp != 0)
679 __tmp->_M_add_ref_copy();
680 if (_M_pi != 0)
681 _M_pi->_M_release();
CID 285739: Unsafe assignment operator (SELF_ASSIGN) [select issue]
682 _M_pi = __tmp;
683 }
684 return *this;
685 }
686
687 void
688 _M_swap(__shared_count& __r) noexcept
689 {
690 _Sp_counted_base<_Lp>* __tmp = __r._M_pi;
691 __r._M_pi = _M_pi;
692 _M_pi = __tmp;
693 }
694
695 long
696 _M_get_use_count() const noexcept
697 { return _M_pi != 0 ? _M_pi->_M_get_use_count() : 0; }
698
699 bool
700 _M_unique() const noexcept
701 { return this->_M_get_use_count() == 1; }
702
703 void*
704 _M_get_deleter(const std::type_info& __ti) const noexcept
705 { return _M_pi ? _M_pi->_M_get_deleter(__ti) : nullptr; }
706
707 bool
708 _M_less(const __shared_count& __rhs) const noexcept
709 { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi,
__rhs._M_pi); }
710
711 bool
712 _M_less(const __weak_count<_Lp>& __rhs) const noexcept
713 { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi,
__rhs._M_pi); }
714
715 // Friend function injected into enclosing namespace and found by ADL
716 friend inline bool
717 operator==(const __shared_count& __a, const __shared_count& __b)
noexcept
718 { return __a._M_pi == __b._M_pi; }
719
720 private:
721 friend class __weak_count<_Lp>;
722
723 _Sp_counted_base<_Lp>* _M_pi;
724 };
725
726
727 template<_Lock_policy _Lp>
728 class __weak_count
729 {
730 public:
731 constexpr __weak_count() noexcept : _M_pi(nullptr)
732 { }
733
734 __weak_count(const __shared_count<_Lp>& __r) noexcept
735 : _M_pi(__r._M_pi)
736 {
737 if (_M_pi != nullptr)
738 _M_pi->_M_weak_add_ref();
739 }
740
741 __weak_count(const __weak_count& __r) noexcept
742 : _M_pi(__r._M_pi)
743 {
744 if (_M_pi != nullptr)
745 _M_pi->_M_weak_add_ref();
746 }
747
748 __weak_count(__weak_count&& __r) noexcept
749 : _M_pi(__r._M_pi)
750 { __r._M_pi = nullptr; }
751
752 ~__weak_count() noexcept
753 {
754 if (_M_pi != nullptr)
755 _M_pi->_M_weak_release();
756 }
757
758 __weak_count&
759 operator=(const __shared_count<_Lp>& __r) noexcept
760 {
761 _Sp_counted_base<_Lp>* __tmp = __r._M_pi;
762 if (__tmp != nullptr)
763 __tmp->_M_weak_add_ref();
764 if (_M_pi != nullptr)
765 _M_pi->_M_weak_release();
766 _M_pi = __tmp;
767 return *this;
768 }
769
770 __weak_count&
771 operator=(const __weak_count& __r) noexcept
772 {
773 _Sp_counted_base<_Lp>* __tmp = __r._M_pi;
774 if (__tmp != nullptr)
775 __tmp->_M_weak_add_ref();
776 if (_M_pi != nullptr)
777 _M_pi->_M_weak_release();
CID 285738: Unsafe assignment operator (SELF_ASSIGN) [select issue]
778 _M_pi = __tmp;
779 return *this;
780 }
781
782 __weak_count&
783 operator=(__weak_count&& __r) noexcept
784 {
785 if (_M_pi != nullptr)
786 _M_pi->_M_weak_release();
CID 5529785: Unsafe assignment operator (SELF_ASSIGN) [select issue]
787 _M_pi = __r._M_pi;
788 __r._M_pi = nullptr;
789 return *this;
790 }
791
792 void
793 _M_swap(__weak_count& __r) noexcept
794 {
795 _Sp_counted_base<_Lp>* __tmp = __r._M_pi;
796 __r._M_pi = _M_pi;
797 _M_pi = __tmp;
798 }
799
800 long
801 _M_get_use_count() const noexcept
802 { return _M_pi != nullptr ? _M_pi->_M_get_use_count() : 0; }
803
804 bool
805 _M_less(const __weak_count& __rhs) const noexcept
806 { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi,
__rhs._M_pi); }
807
808 bool
809 _M_less(const __shared_count<_Lp>& __rhs) const noexcept
810 { return std::less<_Sp_counted_base<_Lp>*>()(this->_M_pi,
__rhs._M_pi); }
811
812 // Friend function injected into enclosing namespace and found by ADL
813 friend inline bool
814 operator==(const __weak_count& __a, const __weak_count& __b) noexcept
815 { return __a._M_pi == __b._M_pi; }
816
817 private:
818 friend class __shared_count<_Lp>;
819
820 _Sp_counted_base<_Lp>* _M_pi;
821 };
822
823 // Now that __weak_count is defined we can define this constructor:
824 template<_Lock_policy _Lp>
825 inline
826 __shared_count<_Lp>::__shared_count(const __weak_count<_Lp>& __r)
827 : _M_pi(__r._M_pi)
828 {
829 if (_M_pi != nullptr)
830 _M_pi->_M_add_ref_lock();
831 else
832 __throw_bad_weak_ptr();
833 }
834
835 // Now that __weak_count is defined we can define this constructor:
836 template<_Lock_policy _Lp>
837 inline
838 __shared_count<_Lp>::
839 __shared_count(const __weak_count<_Lp>& __r, std::nothrow_t)
840 : _M_pi(__r._M_pi)
841 {
842 if (_M_pi != nullptr)
843 if (!_M_pi->_M_add_ref_lock_nothrow())
844 _M_pi = nullptr;
845 }
846
847 // Support for enable_shared_from_this.
848
849 // Friend of __enable_shared_from_this.
850 template<_Lock_policy _Lp, typename _Tp1, typename _Tp2>
851 void
852 __enable_shared_from_this_helper(const __shared_count<_Lp>&,
853 const __enable_shared_from_this<_Tp1,
854 _Lp>*, const _Tp2*) noexcept;
855
856 // Friend of enable_shared_from_this.
857 template<typename _Tp1, typename _Tp2>
858 void
859 __enable_shared_from_this_helper(const __shared_count<>&,
860 const enable_shared_from_this<_Tp1>*,
861 const _Tp2*) noexcept;
862
863 template<_Lock_policy _Lp>
864 inline void
865 __enable_shared_from_this_helper(const __shared_count<_Lp>&, ...)
noexcept
866 { }
867
868
869 template<typename _Tp, _Lock_policy _Lp>
870 class __shared_ptr
871 {
872 template<typename _Ptr>
873 using _Convertible
874 = typename enable_if<is_convertible<_Ptr, _Tp*>::value>::type;
875
876 public:
877 typedef _Tp element_type;
878
879 constexpr __shared_ptr() noexcept
880 : _M_ptr(0), _M_refcount()
881 { }
882
883 template<typename _Tp1>
884 explicit __shared_ptr(_Tp1* __p)
885 : _M_ptr(__p), _M_refcount(__p)
886 {
887 __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
888 static_assert( !is_void<_Tp1>::value, "incomplete type" );
889 static_assert( sizeof(_Tp1) > 0, "incomplete type" );
890 __enable_shared_from_this_helper(_M_refcount, __p, __p);
891 }
>From gcc-bugs-return-641644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:39:09 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90187] [8 Regression] ICE in extract_insn, at recog.c:2304 x86_64
Date: Wed, 24 Apr 2019 09:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90187
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8/9 Regression] ICE in |[8 Regression] ICE in
|extract_insn, at |extract_insn, at
|recog.c:2304 x86_64 |recog.c:2304 x86_64
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
>From gcc-bugs-return-641645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:46:05 2019
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From: "venkateshprabu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90222] New: Speculative execution data leak
Date: Wed, 24 Apr 2019 09:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90222
Bug ID: 90222
Summary: Speculative execution data leak
Product: gcc
Version: 6.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: venkateshprabu at gmail dot com
Target Milestone: ---
File:
aarch64-gnu-linux/usr/include/c++/6.4.1/aarch64-gnu-linux/bits/ctype_inline.h
Speculative execution data leak
An attacker might be able to read the process' memory.
In std::​ctype<char>::​scan_is(unsigned short, char const *, char const *):
Accessing memory based on a speculative out-of-bounds access. (CWE-200)
Coverity report:
37namespace std _GLIBCXX_VISIBILITY(default)
38{
39_GLIBCXX_BEGIN_NAMESPACE_VERSION
40
41 bool
42 ctype<char>::
43 is(mask __m, char __c) const
44 { return _M_table[static_cast<unsigned char>(__c)] & __m; }
45
46 const char*
47 ctype<char>::
48 is(const char* __low, const char* __high, mask* __vec) const
49 {
50 while (__low < __high)
CID 8654704: Nested memory access
(AUDIT.SPECULATIVE_EXECUTION_DATA_LEAK) [select issue]
51 *__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
52 return __high;
53 }
54
55 const char*
56 ctype<char>::
57 scan_is(mask __m, const char* __low, const char* __high) const
58 {
1. compare_value: Comparing __low in __low < __high.
2. Condition __low < __high, taking true branch.
3. compared_memory_access: Using compared value __low to access memory
in *__low, yielding a potentially sensitive 1-byte value.
CID 8655024 (#1 of 1): Speculative execution data leak
(AUDIT.SPECULATIVE_EXECUTION_DATA_LEAK)
4. sensitive_memory_access: Using sensitive value static_cast<unsigned
char>(*__low) to access memory in this->_M_table[static_cast<unsigned
char>(*__low)].
Insert a barrier, such as the lfence instruction, between the
comparison and the memory accesses to prevent speculative execution.
59 while (__low < __high
60 && !(_M_table[static_cast<unsigned char>(*__low)] & __m))
61 ++__low;
62 return __low;
63 }
64
65 const char*
66 ctype<char>::
67 scan_not(mask __m, const char* __low, const char* __high) const
68 {
CID 8654818: Speculative execution data leak
(AUDIT.SPECULATIVE_EXECUTION_DATA_LEAK) [select issue]
69 while (__low < __high
70 && (_M_table[static_cast<unsigned char>(*__low)] & __m) != 0)
71 ++__low;
72 return __low;
73 }
74
75_GLIBCXX_END_NAMESPACE_VERSION
76} // namespace
>From gcc-bugs-return-641646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:46:46 2019
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90220] std::any_cast misbehaves for function and array types
Date: Wed, 24 Apr 2019 09:46:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 24 09:46:07 2019
New Revision: 270538
URL: https://gcc.gnu.org/viewcvs?rev=270538&root=gcc&view=rev
Log:
PR libstdc++/90220 Fix std::any_cast for function pointers
PR libstdc++/90220 (partial)
* include/std/any (any_cast<T>(any*), any_cast<T>(const any*)): Do
not attempt ill-formed static_cast to pointers to non-object types.
* testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
function types.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/any
trunk/libstdc++-v3/testsuite/20_util/any/misc/any_cast.cc
>From gcc-bugs-return-641647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:48:27 2019
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From: "venkateshprabu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90223] New: Speculative execution data leak
Date: Wed, 24 Apr 2019 09:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90223
Bug ID: 90223
Summary: Speculative execution data leak
Product: gcc
Version: 6.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: venkateshprabu at gmail dot com
Target Milestone: ---
File :
/aarch64-gnu-linux/usr/include/c++/6.4.1/aarch64-gnu-linux/bits/ctype_inline.h
scan_not
Speculative execution data leak
An attacker might be able to read the process' memory.
In std::​ctype<char>::​scan_not(unsigned short, char const *, char const *):
Accessing memory based on a speculative out-of-bounds access. (CWE-200)
Is this false postivie by coverity ??
Coverity report:
37namespace std _GLIBCXX_VISIBILITY(default)
38{
39_GLIBCXX_BEGIN_NAMESPACE_VERSION
40
41 bool
42 ctype<char>::
43 is(mask __m, char __c) const
44 { return _M_table[static_cast<unsigned char>(__c)] & __m; }
45
46 const char*
47 ctype<char>::
48 is(const char* __low, const char* __high, mask* __vec) const
49 {
50 while (__low < __high)
CID 8654704: Nested memory access
(AUDIT.SPECULATIVE_EXECUTION_DATA_LEAK) [select issue]
51 *__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
52 return __high;
53 }
54
55 const char*
56 ctype<char>::
57 scan_is(mask __m, const char* __low, const char* __high) const
58 {
CID 8655024: Speculative execution data leak
(AUDIT.SPECULATIVE_EXECUTION_DATA_LEAK) [select issue]
59 while (__low < __high
60 && !(_M_table[static_cast<unsigned char>(*__low)] & __m))
61 ++__low;
62 return __low;
63 }
64
65 const char*
66 ctype<char>::
67 scan_not(mask __m, const char* __low, const char* __high) const
68 {
1. compare_value: Comparing __low in __low < __high.
2. Condition __low < __high, taking true branch.
3. compared_memory_access: Using compared value __low to access memory
in *__low, yielding a potentially sensitive 1-byte value.
CID 8654818 (#1 of 1): Speculative execution data leak
(AUDIT.SPECULATIVE_EXECUTION_DATA_LEAK)
4. sensitive_memory_access: Using sensitive value static_cast<unsigned
char>(*__low) to access memory in this->_M_table[static_cast<unsigned
char>(*__low)].
Insert a barrier, such as the lfence instruction, between the
comparison and the memory accesses to prevent speculative execution.
69 while (__low < __high
70 && (_M_table[static_cast<unsigned char>(*__low)] & __m) != 0)
71 ++__low;
72 return __low;
73 }
74
75_GLIBCXX_END_NAMESPACE_VERSION
76} // namespace
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90221] Resource leak in object
Date: Wed, 24 Apr 2019 09:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90221
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Venkatesh Prabhu from comment #0)
> Is this false positive by coverity ?
Yes, the destructor frees it.
>From gcc-bugs-return-641649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:52:56 2019
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From: "venkateshprabu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90224] New: Resource leak..
Date: Wed, 24 Apr 2019 09:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90224
Bug ID: 90224
Summary: Resource leak..
Product: gcc
Version: 6.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: venkateshprabu at gmail dot com
Target Milestone: ---
File: /aarch64-gnu-linux/usr/include/c++/6.4.1/bits/unordered_set.h operator
=
Resource leak
The system resource will not be reclaimed and reused, reducing the future
availability of the resource.
In std::​unordered_set<communication::​remoteUI::​ResourceID::​type,
std::​hash<communication::​remoteUI::​ResourceID::​type>,
std::​equal_to<communication::​remoteUI::​ResourceID::​type>,
std::​allocator<communication::​remoteUI::​ResourceID::​type>>::​operator
=(std::​unordered_set<communication::​remoteUI::​ResourceID::​type,
std::​hash<communication::​remoteUI::​ResourceID::​type>,
std::​equal_to<communication::​remoteUI::​ResourceID::​type>,
std::​allocator<communication::​remoteUI::​ResourceID::​type>> const&): Leak of
memory or pointers to system resources (CWE-404)
Is this false positive by coverity ?
Coverity report:
242 unordered_set(initializer_list<value_type> __l,
243 size_type __n,
244 const allocator_type& __a)
245 : unordered_set(__l, __n, hasher(), key_equal(), __a)
246 { }
247
248 unordered_set(initializer_list<value_type> __l,
249 size_type __n, const hasher& __hf,
250 const allocator_type& __a)
251 : unordered_set(__l, __n, __hf, key_equal(), __a)
252 { }
253
254 /// Copy assignment operator.
255 unordered_set&
1. alloc_arg: operator = allocates memory that is stored into
this->_M_h._M_buckets. [show details]
CID 8652455 (#1 of 1): Resource leak (RESOURCE_LEAK)
2. overwrite_var: Overwriting this->_M_h._M_buckets in call to operator = leaks
the storage that this->_M_h._M_buckets points to. [show details]
256 operator=(const unordered_set&) = default;
257
258 /// Move assignment operator.
259 unordered_set&
260 operator=(unordered_set&&) = default;
261
262 /**
263 * @brief %Unordered_set list assignment operator.
264 * @param __l An initializer_list.
265 *
266 * This function fills an %unordered_set with copies of the elements
in
267 * the initializer list @a __l.
268 *
269 * Note that the assignment completely changes the %unordered_set and
270 * that the resulting %unordered_set's size is the same as the number
271 * of elements assigned. Old data may be lost.
272 */
273 unordered_set&
274 operator=(initializer_list<value_type> __l)
275 {
276 _M_h = __l;
277 return *this;
278 }
279
280 /// Returns the allocator object with which the %unordered_set was
281 /// constructed.
282 allocator_type
283 get_allocator() const noexcept
284 { return _M_h.get_allocator(); }
285
286 // size and capacity:
287
288 /// Returns true if the %unordered_set is empty.
289 bool
290 empty() const noexcept
>From gcc-bugs-return-641651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:54:44 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90225] New: Resource leak..
Date: Wed, 24 Apr 2019 09:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90225
Bug ID: 90225
Summary: Resource leak..
Product: gcc
Version: 6.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
File:
Resource leak
The system resource will not be reclaimed and reused, reducing the future
availability of the resource.
In std::​unordered_map<std::​__cxx11::​basic_string<char,
std::​char_traits<char>, std::​allocator<char>>,
std::​__cxx11::​basic_string<char, std::​char_traits<char>,
std::​allocator<char>>, std::​hash<std::​__cxx11::​basic_string<char,
std::​char_traits<char>, std::​allocator<char>>>,
std::​equal_to<std::​__cxx11::​basic_string<char, std::​char_traits<char>,
std::​allocator<char>>>,
std::​allocator<std::​pair<std::​__cxx11::​basic_string<char,
std::​char_traits<char>, std::​allocator<char>> const,
std::​__cxx11::​basic_string<char, std::​char_traits<char>,
std::​allocator<char>>>>>::​operator
=(std::​unordered_map<std::​__cxx11::​basic_string<char,
std::​char_traits<char>, std::​allocator<char>>,
std::​__cxx11::​basic_string<char, std::​char_traits<char>,
std::​allocator<char>>, std::​hash<std::​__cxx11::​basic_string<char,
std::​char_traits<char>, std::​allocator<char>>>,
std::​equal_to<std::​__cxx11::​basic_string<char, std::​char_traits<char>,
std::​allocator<char>>>,
std::​allocator<std::​pair<std::​__cxx11::​basic_string<char,
std::​char_traits<char>, std::​allocator<char>> const,
std::​__cxx11::​basic_string<char, std::​char_traits<char>,
std::​allocator<char>>>>> const &): Leak of memory or pointers to system
resources (CWE-404)
Is this false positive by coverity?
Coverity report:
unordered_map(initializer_list<value_type> __l,
255 size_type __n, const hasher& __hf,
256 const allocator_type& __a)
257 : unordered_map(__l, __n, __hf, key_equal(), __a)
258 { }
259
260 /// Copy assignment operator.
261 unordered_map&
1. alloc_arg: operator = allocates memory that is stored into
this->_M_h._M_buckets. [show details]
CID 8650859 (#1 of 1): Resource leak (RESOURCE_LEAK)
2. overwrite_var: Overwriting this->_M_h._M_buckets in call to operator = leaks
the storage that this->_M_h._M_buckets points to. [show details]
262 operator=(const unordered_map&) = default;
263
264 /// Move assignment operator.
265 unordered_map&
266 operator=(unordered_map&&) = default;
267
268 /**
269 * @brief %Unordered_map list assignment operator.
270 * @param __l An initializer_list.
271 *
272 * This function fills an %unordered_map with copies of the elements
in
273 * the initializer list @a __l.
274 *
>From gcc-bugs-return-641650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:54:01 2019
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Subject: [Bug libstdc++/90220] std::any_cast misbehaves for function and array types
Date: Wed, 24 Apr 2019 09:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90220
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The first example compiles OK on trunk now, the second isn't fixed yet.
>From gcc-bugs-return-641652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:54:46 2019
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90226] New: ICE in expand_expr_addr_expr_1, at expr.c:7994
Date: Wed, 24 Apr 2019 09:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90226
Bug ID: 90226
Summary: ICE in expand_expr_addr_expr_1, at expr.c:7994
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu
g++-9.0.0-alpha20190421 snapshot (r270485) ICEs when compiling the following
testcase w/ -m32 -Os -fno-inline -fno-ipa-cp -fno-ipa-sra:
struct sa {
};
struct j4 {
template <typename... VY> constexpr
j4 (VY...)
{
}
int at, os = 0;
};
j4 lu { sa { } };
% powerpc-e300c3-linux-gnu-g++-9.0.0-alpha20190421 -m32 -Os -fno-inline
-fno-ipa-cp -fno-ipa-sra -c fzgqcnnp.cc
during RTL pass: expand
fzgqcnnp.cc: In constructor 'constexpr j4::j4(VY ...) [with VY = {sa}]':
fzgqcnnp.cc:8:3: internal compiler error: in expand_expr_addr_expr_1, at
expr.c:7994
8 | }
| ^
0x678a4e expand_expr_addr_expr_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/expr.c:7994
0xc147e6 expand_expr_addr_expr
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/expr.c:8107
0xc147e6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/expr.c:11262
0xaec7c6 expand_normal
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/expr.h:285
0xaec7c6 precompute_register_parameters
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/calls.c:967
0xaec7c6 expand_call(tree_node*, rtx_def*, int)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/calls.c:4001
0xc16305 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/expr.c:11033
0xafda0d expand_expr
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/expr.h:279
0xafda0d expand_call_stmt
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/cfgexpand.c:2724
0xafda0d expand_gimple_stmt_1
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/cfgexpand.c:3691
0xafda0d expand_gimple_stmt
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/cfgexpand.c:3850
0xb0342c expand_gimple_tailcall
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/cfgexpand.c:3897
0xb0342c expand_gimple_basic_block
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/cfgexpand.c:5863
0xb05507 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/cfgexpand.c:6509
>From gcc-bugs-return-641653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:57:23 2019
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Subject: [Bug libstdc++/90224] Resource leak..
Date: Wed, 24 Apr 2019 09:57:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Venkatesh Prabhu from comment #0)
> Is this false positive by coverity ?
Yes, it's just nonsense.
>From gcc-bugs-return-641654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:58:33 2019
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Subject: [Bug libstdc++/90223] Speculative execution data leak
Date: Wed, 24 Apr 2019 09:58:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why are you bothering to test and report issues in GCC 6.4.1, which is not a
released version, and is from a closed, unsupported branch?
>From gcc-bugs-return-641655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 09:59:00 2019
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Subject: [Bug libstdc++/90222] Speculative execution data leak
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why are you bothering to test and report issues in GCC 6.4.1, which is not a
released version, and is from a closed, unsupported branch?
>From gcc-bugs-return-641656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 10:01:51 2019
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Subject: [Bug libstdc++/90225] Resource leak..
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is the same nonsense as PR 90224, please stop.
>From gcc-bugs-return-641657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 10:04:13 2019
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From: "venkateshprabu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/90225] Resource leak..
Date: Wed, 24 Apr 2019 10:04:00 -0000
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--- Comment #2 from Venkatesh Prabhu <venkateshprabu at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> This is the same nonsense as PR 90224, please stop.
Sorry for the trouble. Thanks a lot for quicker response.
>From gcc-bugs-return-641658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 10:04:47 2019
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Subject: [Bug libstdc++/90222] Speculative execution data leak
Date: Wed, 24 Apr 2019 10:04:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I already said GCC 6.x is not supported in PR 88673
>From gcc-bugs-return-641659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 10:04:56 2019
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Subject: [Bug libstdc++/90223] Speculative execution data leak
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I already said GCC 6.x is not supported in PR 88673
>From gcc-bugs-return-641660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 10:07:06 2019
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Subject: [Bug middle-end/90075] [7/8 Regression] [AArch64] ICE during RTL pass when member of union passed to copysignf
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--- Comment #6 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
(In reply to ramana.radhakrishnan@arm.com from comment #5)
> For the release branches, I think backporting your patch (and any followups
> , do you remember any ?) should be fine and we should just do it ./
I don't recall any. Certainly none are recorded in the PR.
>From gcc-bugs-return-641661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 10:08:54 2019
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Subject: [Bug c++/90215] [8/9 Regression] ICE with lambda in fold expression over comma and assignment
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--- Comment #3 from Vittorio Romeo <vittorio.romeo at outlook dot com> ---
Changing the lambda to the following
std::apply([&xs...](auto&... ys)
{
(xs.f([&ys...](auto y)
{
ys = y;
}), ...);
}, t);
produces a different ICE:
<source>:20:9: internal compiler error: Segmentation fault
20 | (xs.f([&ys...](auto y)
| ^
https://gcc.godbolt.org/z/hp2hMN
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
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--- Comment #18 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to rsandifo@gcc.gnu.org from comment #14)
> Yeah, the patch I committed fixed two separate instances of
> undefined overflow, but I think there are a lot more left.
Excellent results so far, but I have new data on remaining
runtime errors.
I tried all the C code in the testsuite with a ubsan
version of gcc trunk 270500. I used compiler flags -g -O3 -march=native -Wall.
I got 26 runtime errors, of which 20 are poly-int.h
C++ and fortran remain untested. I'll get to those soon.
Of the C errors, the 6 that aren't poly-int.h, I will report on
in other bug reports.
Of the 20 runtime errors from poly-int.h, they are produced
by this list of C source code files:
./c-c++-common/Warray-bounds-2.c
./c-c++-common/Warray-bounds.c
./gcc.dg/strlenopt-55.c
./gcc.dg/torture/pr84811.c
./gcc.dg/torture/pr84929.c
./gcc.dg/Warray-bounds-22.c
./gcc.dg/Warray-bounds-30.c
./gcc.dg/Warray-bounds-31.c
Most of these are array bounds. I'll find out stack backtraces for
each of these.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libffi/90146] Add support for NetBSD
Date: Wed, 24 Apr 2019 10:50:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that libffi has a different upstream (but we've not updated since quite
some time)
>From gcc-bugs-return-641664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 10:53:21 2019
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Subject: [Bug translation/90149] diagnostics containing BIT_FIELD_REF don't conform to diagnostics guideline
Date: Wed, 24 Apr 2019 10:53:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
IMNSHO the IL checker "errors" should continue to use GCC terms since they
check the GIMPLE intermediate language. They also shouldn't necessarily be
translated (though they may end up user-facing if they turn on -fchecking).
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Wed, 24 Apr 2019 11:00:00 -0000
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--- Comment #19 from David Binderman <dcb314 at hotmail dot com> ---
For ./c-c++-common/Warray-bounds-2.c
../../trunk/gcc/poly-int.h:1107:5: runtime error: signed integer overflow: 8 *
-9223372036854775796 cannot be represented in type 'long int'
#0 0x2ddd587 in poly_int<1u, poly_result<if_nonpoly<int, int,
poly_int_traits<int>::is_poly>::type, long,
poly_coeff_pair_traits<if_nonpoly<int, int,
poly_int_traits<int>::is_poly>::type, long>::result_kind>::type> operator*<1u,
int, long>(int const&, poly_int_pod<1u, long> const&)
../../trunk/gcc/poly-int.h:1107
#1 0x2ddd587 in ao_ref_init_from_ptr_and_size(ao_ref*, tree_node*,
tree_node*) ../../trunk/gcc/tree-ssa-alias.c:703
#2 0x2ea1f49 in initialize_ao_ref_for_dse
../../trunk/gcc/tree-ssa-dse.c:106
#3 0x2ea1f49 in initialize_ao_ref_for_dse ../../trunk/gcc/tree-ssa-dse.c:91
#4 0x2ea784b in dse_dom_walker::dse_optimize_stmt(gimple_stmt_iterator*)
../../trunk/gcc/tree-ssa-dse.c:851
For ./c-c++-common/Warray-bounds.c
../../trunk/gcc/poly-int.h:715:21: runtime error: signed integer overflow:
9223372036854775804 + 4 cannot be represented in type 'long int'
#0 0x318ecb2 in poly_int<1u, long>& poly_int<1u,
long>::operator+=<long>(poly_int_pod<1u, long> const&)
../../trunk/gcc/poly-int.h:715
#1 0x318ecb2 in vn_reference_compute_hash
../../trunk/gcc/tree-ssa-sccvn.c:657
#2 0x31b26b5 in vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind,
vn_reference_s**, bool) ../../trunk/gcc/tree-ssa-sccvn.c:2714
#3 0x31ea070 in visit_reference_op_load
../../trunk/gcc/tree-ssa-sccvn.c:4091
#4 0x31ea070 in visit_stmt ../../trunk/gcc/tree-ssa-sccvn.c:4509
For /gcc.dg/strlenopt-55.c
../../trunk/gcc/poly-int.h:1095:5: runtime error: signed integer overflow:
9223372036854775805 * 8 cannot be represented in type 'long int'
#0 0x31917e4 in poly_int<1u, poly_result<long, if_nonpoly<int, int,
poly_int_traits<int>::is_poly>::type, poly_coeff_pair_traits<long,
if_nonpoly<int, int, poly_int_traits<int>::is_poly>::type>::result_kind>::type>
operator*<1u, long, int>(poly_int_pod<1u, long> const&, int const&)
../../trunk/gcc/poly-int.h:1095
#1 0x31917e4 in fully_constant_vn_reference_p(vn_reference_s*)
../../trunk/gcc/tree-ssa-sccvn.c:1485
#2 0x31b26c3 in vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind,
vn_reference_s**, bool) ../../trunk/gcc/tree-ssa-sccvn.c:2715
#3 0x31ea070 in visit_reference_op_load
../../trunk/gcc/tree-ssa-sccvn.c:4091
#4 0x31ea070 in visit_stmt ../../trunk/gcc/tree-ssa-sccvn.c:4509
For ./gcc.dg/torture/pr84811.c
../../trunk/gcc/cse.c:2215:34: runtime error: signed integer overflow:
162675373468811328 - -9060696663385964544 cannot be represented in type 'long
int'
#0 0x4e5f416 in use_related_value ../../trunk/gcc/cse.c:2215
#1 0x4e5f416 in cse_insn ../../trunk/gcc/cse.c:4877
#2 0x4e60b7e in cse_extended_basic_block ../../trunk/gcc/cse.c:6662
#3 0x4e60b7e in cse_main ../../trunk/gcc/cse.c:6841
#4 0x4e680ee in rest_of_handle_cse2 ../../trunk/gcc/cse.c:7743
For /gcc.dg/torture/pr84929.c
../../trunk/gcc/poly-int.h:753:21: runtime error: signed integer overflow:
-5621332293356458048 * 8 cannot be represented in type 'long int'
#0 0x1929e14 in if_nonpoly<int, poly_int<1u, long>,
poly_int_traits<int>::is_poly>::type& poly_int<1u, long>::operator*=<int>(int
const&) ../../trunk/gcc/poly-int.h:753
#1 0x1929e14 in fold_const_aggregate_ref_1(tree_node*, tree_node*
(*)(tree_node*)) ../../trunk/gcc/gimple-fold.c:6992
#2 0x192b422 in gimple_fold_stmt_to_constant_1(gimple*, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*)) ../../trunk/gcc/gimple-fold.c:6426
#3 0x2e1ab24 in ccp_fold ../../trunk/gcc/tree-ssa-ccp.c:1257
#4 0x2e1ab24 in evaluate_stmt ../../trunk/gcc/tree-ssa-ccp.c:1785
For ./gcc.dg/Warray-bounds-22.c
../../trunk/gcc/poly-int.h:1095:5: runtime error: signed integer overflow:
9223372036854775807 * 8 cannot be represented in type 'long int'
#0 0xf85e20 in poly_int<1u, poly_result<long, if_nonpoly<int, int,
poly_int_traits<int>::is_poly>::type, poly_coeff_pair_traits<long,
if_nonpoly<int, int, poly_int_traits<int>::is_poly>::type>::result_kind>::type>
operator*<1u, long, int>(poly_int_pod<1u, long> const&, int const&)
../../trunk/gcc/poly-int.h:1095
#1 0xf85e20 in get_object_alignment_2 ../../trunk/gcc/builtins.c:344
#2 0xf86d9d in get_object_alignment_1(tree_node*, unsigned int*, unsigned
long*) ../../trunk/gcc/builtins.c:394
#3 0xf86d9d in get_object_alignment(tree_node*)
../../trunk/gcc/builtins.c:405
#4 0x1690d75 in expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool) ../../trunk/gcc/expr.c:10343
For ./gcc.dg/Warray-bounds-30.c
../../trunk/gcc/cse.c:2215:34: runtime error: signed integer overflow: 0 -
-9223372036854775808 cannot be represented in type 'long int'
#0 0x4e5f416 in use_related_value ../../trunk/gcc/cse.c:2215
#1 0x4e5f416 in cse_insn ../../trunk/gcc/cse.c:4877
#2 0x4e60b7e in cse_extended_basic_block ../../trunk/gcc/cse.c:6662
#3 0x4e60b7e in cse_main ../../trunk/gcc/cse.c:6841
#4 0x4e67ef5 in rest_of_handle_cse ../../trunk/gcc/cse.c:7678
For ./gcc.dg/Warray-bounds-31.c
../../trunk/gcc/poly-int.h:1095:5: runtime error: signed integer overflow:
-9223372036854775799 * 8 cannot be represented in type 'long int'
#0 0x31917e4 in poly_int<1u, poly_result<long, if_nonpoly<int, int,
poly_int_traits<int>::is_poly>::type, poly_coeff_pair_traits<long,
if_nonpoly<int, int, poly_int_traits<int>::is_poly>::type>::result_kind>::type>
operator*<1u, long, int>(poly_int_pod<1u, long> const&, int const&)
../../trunk/gcc/poly-int.h:1095
#1 0x31917e4 in fully_constant_vn_reference_p(vn_reference_s*)
../../trunk/gcc/tree-ssa-sccvn.c:1485
#2 0x31b26c3 in vn_reference_lookup(tree_node*, tree_node*, vn_lookup_kind,
vn_reference_s**, bool) ../../trunk/gcc/tree-ssa-sccvn.c:2715
#3 0x31ea070 in visit_reference_op_load
../../trunk/gcc/tree-ssa-sccvn.c:4091
#4 0x31ea070 in visit_stmt ../../trunk/gcc/tree-ssa-sccvn.c:4509
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Subject: [Bug c++/90170] [7/8/9 Regression] ICE in unify, at cp/pt.c:22209
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Subject: [Bug c++/90173] [9 Regression] ICE: Segmentation fault (in strip_declarator_types)
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Subject: [Bug d/90130] gdc.test/runnable/test12.d FAILs
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--- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> I think it should be done in r270485.
Indeed. It works fine on i386-pc-solaris2.11 and sparc-sun-solaris2.11
with gas. I do get BUS errors in
gcc.unwind.pe.read_encoded_value_with_base on Solaris 11/SPARC when
using /bin/as, but that's unrelated: there are several more failures
that don't occur with gas.
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--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
Still going wrong in revision 270500. Here is a stack backtrace:
../../trunk/gcc/cse.c:2215:34: runtime error: signed integer overflow: 1 -
-9223
372036854775807 cannot be represented in type 'long int'
#0 0x4e5f416 in use_related_value ../../trunk/gcc/cse.c:2215
#1 0x4e5f416 in cse_insn ../../trunk/gcc/cse.c:4877
#2 0x4e60b7e in cse_extended_basic_block ../../trunk/gcc/cse.c:6662
#3 0x4e60b7e in cse_main ../../trunk/gcc/cse.c:6841
#4 0x4e67ef5 in rest_of_handle_cse ../../trunk/gcc/cse.c:7678
>From gcc-bugs-return-641670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:11:03 2019
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Subject: [Bug c++/90201] -Werror=useless-cast in move constructir
Date: Wed, 24 Apr 2019 11:11:00 -0000
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--- Comment #2 from Dima Pro <prokofjev.d at gmail dot com> ---
without -Werror=useless-cast no warning for this code at all.(In reply to
Jonathan Wakely from comment #1)
> N.B. This is a warning, not an error. Reporting that you get an error
> because you turned it into an error doesn't change that is a warning :-)
without -Werror=useless-cast no warning for this code at all.
>From gcc-bugs-return-641671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:12:45 2019
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/90079] SEGV in _aaKeys, _aaValues on 32-bit SPARC
Date: Wed, 24 Apr 2019 11:12:00 -0000
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--- Comment #7 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
> It ended up being a little more work, as the proposed patch had a bug in it.
No wonder given that I just started with D ;-)
> But it's now done in r270514.
Excellent, thanks.
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Subject: [Bug c++/90227] New: [9 Regression] trunk rejects polymake since r269965
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Bug ID: 90227
Summary: [9 Regression] trunk rejects polymake since r269965
Product: gcc
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template < int b > struct c {
static constexpr int d = b;
typedef c e;
};
template < bool, typename a > using f = a;
template < bool g > using h = c< g >;
template < int g > using i = c< g >;
template < typename... > struct ab {};
template < typename... j > struct k { using e = ab< j... >; };
template < typename > struct ad;
template < typename j, typename... l > struct ad< ab< j, l... > > {
using e = ab< l... >;
};
template < typename > struct ae;
template < typename... m > struct ae< ab< m... > > : i< sizeof...(m) > {};
template < typename af, int, int = ae< af >::d > struct ag;
template < typename... m > struct ag< ab< m... >, 0, 0 > { using e = ab<>; };
template < typename... m, int ah >
struct ag< ab< m... >, 0, ah >
: k< typename ag< typename ad< ab< m... > >::e, ah - 1 >::e > {};
template < typename... m, int ai, int ah >
struct ag< ab< m... >, ai, ah > : ag< typename ad< ab< m... > >::e, ai - 1 >
{};
template < typename, template < typename > class > struct aj;
template < typename... j, template < typename > class ak >
struct aj< ab< j... >, ak > {
using e = ab< typename ak< j >::e... >;
};
template < typename, template < typename > class > struct am;
template < typename > struct an {};
template < typename a, a > using ap = an< a >;
template < long... aq > using ar = an< unsigned long, aq... >;
template < long ao > using as = ap< unsigned long, ao >;
class au {
public:
using e = h< c< false >::d >;
};
template < typename, template < typename > class, typename... >
struct ax : au::e {};
struct az {
using e = ar<>;
};
template < typename > struct bb;
template < typename... j > struct bb< ab< j... > > {
using e = as< sizeof...(j) >;
};
template < typename, typename > struct bc;
template < typename... j, long... ba > struct bc< ab< j... >, ar< ba... > > {
using e = az::e;
};
template < typename j, template < typename > class ak >
struct bb< am< j, ak > > : bc< k<>::e, bb< k<>::e >::e > {};
namespace be {
enum bf { bg };
class bk {
public:
enum bl { bm };
};
struct bn {
static const bk::bl bo = bk::bm;
};
template < typename bq > struct br { using e = bq; };
template < typename, bf, int, typename... > class bs;
template < typename bq, bf bt, int bu, typename... j, long... anchors >
class bs< bq, bt, bu, ab< j... >, ar< anchors... > > : bk {
public:
static const bl bo = bq::bo;
static const long bv = bu;
using bw = int;
using bx = ab< j... >;
using by = typename ag< bx, bu >::e;
using bz = typename ag< bx, bu >::e;
using ca = as< bv >;
using cb = typename br< bq >::e;
using c = decltype(cb()(bw(), by(), bz(), ca()));
};
class cf;
template < typename > struct cg : c< false > {};
template < typename bq, bf bt, int bu, typename... j >
class bs< bq, bt, bu, ab< j... > >
: public bs<
bq, bt, bu, typename aj< ab< j... >, cg >::e,
typename bb< am< typename ag< ab< j... >, bu >::e, cg > >::e > {};
} using be::bf;
using be::cf;
template < typename cj > class ck {
template < typename cl > ck(cl) { c< cj::bo >(); }
static ck n;
};
namespace be {
template < typename > class cm;
template < typename j > using cn = ax< j, cm >;
template < typename, typename co >
void r(co, f< cn< co >::d, void * > = nullptr);
} using be::r;
struct cq : be::bn {
template < typename... cs, typename... ct >
auto operator()(int cu, ab< cs... >, ab< ct... >, ar<>) {
r< cs... >(cu);
}
};
template <>
ck< be::bs< cq, bf::bg, 1, ab< int, cf > > >
ck< be::bs< cq, bf::bg, 1, ab< int, cf > > >::n(0);
at -std=c++14 started to be rejected with r269965.
Unreduced testcase is in https://bugzilla.redhat.com/show_bug.cgi?id=1702533#c0
and slightly tweaked unreduced testcase (to workaround lack of clang++
features, ugh, didn't know it doesn't even have __builtin_va_arg_pack, can't
handle constexpr math builtins etc.) in
https://bugzilla.redhat.com/show_bug.cgi?id=1702533#c2 is still accepted before
r269965 and rejected after it, but both clang++ trunk and icpc 19.0.1 reject
both the unreduced and reduced testcases (both with completely different
errors).
So, whether what polymake does is valid is unclear.
>From gcc-bugs-return-641673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:13:57 2019
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Subject: [Bug c++/90227] [9 Regression] trunk rejects polymake since r269965
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Subject: [Bug c++/90190] [8 regression] CTAD confuses with {one element} initializer_list
Date: Wed, 24 Apr 2019 11:14:00 -0000
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Subject: [Bug c++/90190] [8 regression] CTAD confuses with {one element} initializer_list
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Subject: [Bug tree-optimization/88239] ./gcc.dg/torture/pr84929.c with -O3 -march=native causes ubsan error
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
Still going wrong at revision 270500. Here is a stack backtrace:
../../trunk/gcc/tree-ssa-loop-prefetch.c:468:14: runtime error: signed integer
o
verflow: 7818038963515661296 * 4 cannot be represented in type 'long int'
#0 0x30177c3 in idx_analyze_ref
../../trunk/gcc/tree-ssa-loop-prefetch.c:468
#1 0x303b6d8 in for_each_index(tree_node**, bool (*)(tree_node*,
tree_node**
, void*), void*) ../../trunk/gcc/tree-ssa-loop.c:622
#2 0x30147d3 in analyze_ref ../../trunk/gcc/tree-ssa-loop-prefetch.c:530
#3 0x30147d3 in gather_memory_references_ref
../../trunk/gcc/tree-ssa-loop-p
refetch.c:548
#4 0x3018fec in gather_memory_references
../../trunk/gcc/tree-ssa-loop-prefe
tch.c:651
>From gcc-bugs-return-641677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:26:27 2019
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/83118] [7/8/9 Regression] Bad intrinsic assignment of class(*) array component of derived type
Date: Wed, 24 Apr 2019 11:26:00 -0000
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--- Comment #18 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #17 from Paul Thomas <pault at gcc dot gnu.org> ---
> Created attachment 46216
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46216&action=edit
> Patch for the remaining problems.
>
> I am registering this now as a measure of progress towards doing a proper job
> of fixing this PR for good.
I've just applied the patch to trunk, rebuilt f951 on
sparc-sun-solaris2.11 and tested unlimited_polymorphic_30.f03: the test
now PASSes for both 32 and 64-bit.
I'll include the patch in tonight's bootstrap and let you know if there
are any problems elsewhere.
>From gcc-bugs-return-641678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:29:16 2019
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/90065] Unaligned accesses on strict-alignment targets
Date: Wed, 24 Apr 2019 11:29:00 -0000
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--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
I have my suspicions that the following code will throw an unaligned access
error as well.
shared int var;
void main() {
synchronized { var = 1; }
}
As synchronized statements are lowered to the following equivalent C.
static char __critsec64[48];
_d_criticalenter(& __critsec64);
var = 0;
_d_criticalexit(& __critsec64);
Just going off memory, but I don't think the artificial __critsec variable
would be suitably aligned for use as a pthread_mutex_t.
>From gcc-bugs-return-641679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:31:57 2019
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Subject: [Bug debug/90194] ICE in expand_debug_expr, at cfgexpand.c:5244
Date: Wed, 24 Apr 2019 11:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-24
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. update-address-taken does, after CCP:
af (int xn)
{
void * D.2359;
- void * _2;
<bb 2> [local count: 1073741824]:
# DEBUG BEGIN_STMT
# DEBUG D.2357 => 4
# DEBUG nq => &xn
# DEBUG BEGIN_STMT
- _4 = &xn;
# DEBUG D.2357 => NULL
# DEBUG nq => NULL
- _2 = _4;
- MEM[(struct cb *)_2] = {};
+ xn_5 = VIEW_CONVERT_EXPR<int>({});
+ # DEBUG xn => xn_5
return;
which failed to "fold" the V_C_E. It does reach
rhs = fold_build1 (VIEW_CONVERT_EXPR,
TREE_TYPE (lhs), rhs);
but this does nothing.
>From gcc-bugs-return-641680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:32:19 2019
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Subject: [Bug debug/90194] ICE in expand_debug_expr, at cfgexpand.c:5244
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-641681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:39:42 2019
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Subject: [Bug c++/90201] -Werror=useless-cast in move constructir
Date: Wed, 24 Apr 2019 11:39:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You get a warning with -Wuseless-cast
>From gcc-bugs-return-641682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:40:38 2019
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Subject: [Bug libstdc++/90220] std::any_cast misbehaves for function and array types
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch for the second bit posted:
https://gcc.gnu.org/ml/gcc-patches/2019-04/msg00927.html
>From gcc-bugs-return-641683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:43:51 2019
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Subject: [Bug c++/90201] -Werror=useless-cast in move constructir
Date: Wed, 24 Apr 2019 11:43:00 -0000
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--- Comment #4 from Dima Pro <prokofjev.d at gmail dot com> ---
(In reply to Jonathan Wakely from comment #3)
> You get a warning with -Wuseless-cast
Yes, sorry. Miss this.
Anyway, no useless cast warning should be for this code.
>From gcc-bugs-return-641684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 11:54:34 2019
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Subject: [Bug c++/90228] New: [UBSAN]: get_addr_base_and_unit_offset_1
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Bug ID: 90228
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From the C++ testsuite, for source code file
./g++.dg/warn/Wplacement-new-size-5.C with gcc trunk version 207500 and
compiler flag -O2, I get this:
../../trunk/gcc/poly-int.h:715:21: runtime error: signed integer overflow:
92233
72036854775807 + 1 cannot be represented in type 'long int'
#0 0x331775c in poly_int<1u, long>& poly_int<1u,
long>::operator+=<long>(pol
y_int_pod<1u, long> const&) ../../trunk/gcc/poly-int.h:715
#1 0x331775c in get_addr_base_and_unit_offset_1(tree_node*,
poly_int_pod<1u,
long>*, tree_node* (*)(tree_node*)) ../../trunk/gcc/tree-dfa.c:796
#2 0x222248d in gimple_fold_stmt_to_constant_1(gimple*, tree_node*
(*)(tree_
node*), tree_node* (*)(tree_node*)) ../../trunk/gcc/gimple-fold.c:6350
#3 0x36ea4f4 in ccp_fold ../../trunk/gcc/tree-ssa-ccp.c:1257
#4 0x36ea4f4 in evaluate_stmt ../../trunk/gcc/tree-ssa-ccp.c:1785
>From gcc-bugs-return-641685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:09:31 2019
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Subject: [Bug target/90202] AVX-512 instructions not used
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Target| |x86_64-*-* i?86-*-*
Status|UNCONFIRMED |RESOLVED
CC| |hjl.tools at gmail dot com
Resolution|--- |WORKSFORME
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The same pushes/moves appear for the AVX2 code. I think we have a duplicate
for this issue and it appears because we eventually have to align the local
stack to be able to spill ymm/zmm registers and we can't fully elide
the frame construction after RA.
Original issue worksfrme (works as designed), frame issue has a duplicate
somewhere.
>From gcc-bugs-return-641687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:16:56 2019
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Subject: [Bug lto/90229] Interaction among -Wl,--as-needed and LTO results in an undefined symbol
Date: Wed, 24 Apr 2019 12:16:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
$ cat 1.ii
extern int FLAGS_verbose;
extern "C" void pthread_create();
void a(const char *b...) {
if (FLAGS_verbose) {
__builtin_va_list ap;
__builtin_va_start(ap, b);
}
}
void a() { pthread_create(); }
int main() { a(""); return 0; }
>From gcc-bugs-return-641686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:16:45 2019
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Subject: [Bug lto/90229] New: Interaction among -Wl,--as-needed and LTO results in an undefined symbol
Date: Wed, 24 Apr 2019 12:16:00 -0000
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Bug ID: 90229
Summary: Interaction among -Wl,--as-needed and LTO results in
an undefined symbol
Product: gcc
Version: 9.0
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Severity: normal
Priority: P3
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As seen in few openSUSE packages with LTO enabled:
https://bugzilla.opensuse.org/show_bug.cgi?id=1133232
https://bugzilla.opensuse.org/show_bug.cgi?id=1133131
There's some issue:
$ cat lib.cc
int FLAGS_verbose;
$ g++ -shared -fPIC lib.cc -o mylib.so
$ g++ -pthread 1.ii libpes.so -Wl,--as-needed -O
[OK]
But:
$ g++ -pthread 1.ii libpes.so -Wl,--as-needed -O -flto
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld:
/usr/lib64/gcc/x86_64-suse-linux/8/libstdc++.so: undefined reference to
`pthread_create'
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-641688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:17:22 2019
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Subject: [Bug target/90204] [8/9 Regression] C code is optimized worse than C++
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
The difference is that for C++ we directly use DECL_RESULT in the GIMPLE IL
while for C we end up with a copy to it. The C++ FE does
;; Function v test(v, v) (null)
;; enabled by -tree-original
{
struct v res [value-expr: <retval>];
and at the end
<<cleanup_point return <retval>>>;
}
while the C FE uses plain res:
{
struct v res;
...
return res;
}
which in the end also results in try/finally processing for CLOBBERs. Not sure
where the C++ FE decides using <retval> for res is fine and whether the C
FE could do the same. Certainly eliding this extra copy is beneficial.
>From gcc-bugs-return-641689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:18:13 2019
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Subject: [Bug lto/90229] Interaction among -Wl,--as-needed and LTO results in an undefined symbol
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |matz at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
CCing my favorite --as-needed experts ;)
>From gcc-bugs-return-641691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:19:31 2019
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Subject: [Bug tree-optimization/90208] [7/8 Regression] error: EH landing pad label
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----------------------------------------------------------------------------
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>From gcc-bugs-return-641690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:19:16 2019
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Subject: [Bug fortran/90207] Debugging generated tree code
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #0)
> This could also be implemented by a transformation of
> what -fdump-tree-original produces into a valid C program,
> using data structures from libgfortran.
Note this is probably not OK with the FSF (opens up the possibility
of using the gfortran frontend with a proprietary backend).
>From gcc-bugs-return-641692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:20:03 2019
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Subject: [Bug tree-optimization/90211] [8 Regression] ICE: tree check: expected ssa_name, have real_cst in first_readonly_imm_use, at ssa-iterators.h:351
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Known to work| |9.0
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Subject: [Bug c++/90212] [8/9 Regression] by-ref capture of constexpr class object rejected
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Subject: [Bug target/90204] [8/9 Regression] C code is optimized worse than C++
Date: Wed, 24 Apr 2019 12:20:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That would be likely NRV optimization in the C++ FE, but then why doesn't the
generic NRV optimization handle it in the middle-end later on?
>From gcc-bugs-return-641695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:20:30 2019
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/85164] poly-int.h:845:5: runtime error: signed integer overflow
Date: Wed, 24 Apr 2019 12:20:00 -0000
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--- Comment #20 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
> Most of these are array bounds. I'll find out stack backtraces for
> each of these.
Thanks for the testing. Could you open new PRs for the new backtraces?
These are really independent bugs, and it'd be useful to keep this PR
specific to the two problems fixed in r270442.
> I got 26 runtime errors, of which 20 are poly-int.h
FWIW, whether something occurs in poly-int.h or not isn't usually
that relevant. A lot of arithmetic that used to be open-coded now
goes through functions in poly-int.h, so it tends to show up a lot
as the immediate point of failure. But whether the operation triggers
UB is usually determined by the operation being done (i.e. by the
caller) rather than the way poly-int.h implements it. On x86 targets,
what poly-int.h does is usually the same as what the original pre-poly-int
code did.
This was the case in both of the bugs fixed in r270442 for example.
>From gcc-bugs-return-641697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:22:39 2019
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Subject: [Bug tree-optimization/90213] UBSAN: signed integer overflow: -5621332293356458048 * 8 cannot be represented in type 'long int'
Date: Wed, 24 Apr 2019 12:22:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Lemme fix it.
>From gcc-bugs-return-641696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:22:24 2019
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Subject: [Bug tree-optimization/90213] UBSAN: signed integer overflow: -5621332293356458048 * 8 cannot be represented in type 'long int'
Date: Wed, 24 Apr 2019 12:22:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The code even says
/* TODO: This code seems wrong, multiply then check
to see if it fits. */
offset *= tree_to_uhwi (unit_size);
offset *= BITS_PER_UNIT;
it might be as simple as moving the multiplication above the to_shwi
check.
>From gcc-bugs-return-641698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:28:33 2019
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Subject: [Bug target/90204] [8/9 Regression] C code is optimized worse than C++
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 24 Apr 2019, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90204
>
> --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> That would be likely NRV optimization in the C++ FE, but then why doesn't the
> generic NRV optimization handle it in the middle-end later on?
Probably getting address-taken due to vectorization / IVOPTs. NRV
runs pretty late.
>From gcc-bugs-return-641699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:29:05 2019
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Subject: [Bug c++/90215] [8/9 Regression] ICE with lambda in fold expression over comma and assignment
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>From gcc-bugs-return-641700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:30:49 2019
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Subject: [Bug libstdc++/88888] Cannot construct filesystem::path from variable length array
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm not sure we should bother doing anything here. There are various
workarounds possible:
std::filesystem::path p(vla);
std::filesystem::path p({vla, (size_t)i});
std::filesystem::path p = (const char*)vla;
std::filesystem::path p = std::string(vla);
std::filesystem::path p = std::string(vla, i);
std::filesystem::path p = std::string_view(vla);
std::filesystem::path p = std::string_view(vla, i);
>From gcc-bugs-return-641701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:31:53 2019
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Subject: [Bug c++/90217] Greater optimization of C++ Code
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Please attach the testcases.
>From gcc-bugs-return-641702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:32:32 2019
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Subject: [Bug libstdc++/88888] Cannot construct filesystem::path from variable length array
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(The versions passing i as the length will do the wrong thing here, because the
array actually contains the empty string "", but I'm just showing examples of
valid syntax that work with VLAs).
>From gcc-bugs-return-641703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:33:04 2019
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Subject: [Bug libstdc++/89728] ctype is underconstrained
Date: Wed, 24 Apr 2019 12:33:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2019-04-24
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>From gcc-bugs-return-641704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:37:37 2019
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Subject: [Bug c++/90228] [UBSAN]: get_addr_base_and_unit_offset_1
Date: Wed, 24 Apr 2019 12:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90228
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm. We return signed offset because the maximum object size is half of the
address space. So I think the code is OK and just invalid C input will produce
undefined output here. Otherwise we'd need one bit more in precision and
sacrifice speed of compilation quite a bit for this hot function.
>From gcc-bugs-return-641705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:42:51 2019
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From: "vittorio.romeo at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90215] [8/9 Regression] ICE with lambda in fold expression over comma and assignment
Date: Wed, 24 Apr 2019 12:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90215
--- Comment #4 from Vittorio Romeo <vittorio.romeo at outlook dot com> ---
Simplified quite a lot, removed `<tuple>` dependency:
https://gcc.godbolt.org/z/6uNcCN
struct X
{
template <class F>
void f(F f)
{
f(0);
}
};
template <class... Xs>
void bug(Xs... xs)
{
int i;
[&](auto&... ys)
{
(xs.f([&](auto)
{
ys;
}), ...);
}(i);
}
int main()
{
bug(X{});
}
>From gcc-bugs-return-641706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:45:02 2019
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Subject: [Bug libstdc++/89728] ctype is underconstrained
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
>From gcc-bugs-return-641708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:46:31 2019
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/90229] Interaction among -Wl,--as-needed and LTO results in an undefined symbol
Date: Wed, 24 Apr 2019 12:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2019-04-24
CC| |hjl.tools at gmail dot com
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is probably a linker bug.
1
1.o 5
207 247afdd8dccf97e2 PREVAILING_DEF_IRONLY _Z1aPKcz
210 247afdd8dccf97e2 PREVAILING_DEF_IRONLY _Z1av
213 247afdd8dccf97e2 PREVAILING_DEF main
228 247afdd8dccf97e2 RESOLVED_DYN FLAGS_verbose
224 247afdd8dccf97e2 UNDEF pthread_create
ld is invoked as
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld -plugin
/usr/lib64/gcc/x86_64-suse-linux/8/liblto_plugin.so
-plugin-opt=/usr/lib64/gcc/x86_64-suse-linux/8/lto-wrapper
-plugin-opt=-fresolution=1.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lpthread
-plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc --build-id --eh-frame-hdr -m elf_x86_64
-dynamic-linker /lib64/ld-linux-x86-64.so.2
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../lib64/crt1.o
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../lib64/crti.o
/usr/lib64/gcc/x86_64-suse-linux/8/crtbegin.o -L.
-L/usr/lib64/gcc/x86_64-suse-linux/8
-L/usr/lib64/gcc/x86_64-suse-linux/8/../../../../lib64 -L/lib/../lib64
-L/usr/lib/../lib64
-L/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/lib
-L/usr/lib64/gcc/x86_64-suse-linux/8/../../.. 1.o mylib.so --as-needed -lstdc++
-lm -lgcc_s -lgcc -lpthread -lc -lgcc_s -lgcc
/usr/lib64/gcc/x86_64-suse-linux/8/crtend.o
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../lib64/crtn.o
works fine with -fuse-ld=gold.
>From gcc-bugs-return-641707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:46:21 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 24 Apr 2019 12:46:00 -0000
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--- Comment #82 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Wed Apr 24 12:45:45 2019
New Revision: 270542
URL: https://gcc.gnu.org/viewcvs?rev=270542&root=gcc&view=rev
Log:
PR target/89093
runtime: mark unwind functions general-regs-only on ARM
For https://gcc.gnu.org/PR89093.
Change-Id: Ic426b43d633c77104bda01d4e7835bc9ab4695ef
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/173657
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Modified:
trunk/gcc/go/gofrontend/MERGE
trunk/libgo/runtime/go-unwind.c
>From gcc-bugs-return-641709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:48:58 2019
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90228] [UBSAN]: get_addr_base_and_unit_offset_1
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-24
CC| |marxin at gcc dot gnu.org
Blocks| |63426
Ever confirmed|0 |1
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
>From gcc-bugs-return-641710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 12:59:51 2019
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Subject: [Bug c++/90186] optimizing options -O1 and -O2 produce different results
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that using #pragma pack(1) on struct Ipv4 makes u_short members not
naturally aligned and thus code like
void UpdateChecksum()
{
u_long sum(0);
SetChecksum(0);
u_short *buf = (u_short*)ip->Payload();
u_long nwords = ip->PayloadSize() / 2;
for (unsigned i = 0; i < nwords; ++i)
{
sum += ntohs(*buf++);
dereferences pointers to u_short that might not be aligned to a 2 byte
boundary.
Confirmed though, even when using -fno-inline. -fno-strict-aliasing fixes
it. Possibly the very same issue above - using u_short * to access memory
with a different dynamic type. The same happens here:
buf = (u_short*)&ph;
nwords = 6;
for (unsigned i = 0; i < nwords; ++i)
{
sum += ntohs(*buf++);
ph is of type PseudoHeader. You cannot use lvalues of type u_short to
refer to them.
>From gcc-bugs-return-641711-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 13:23:27 2019
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Subject: [Bug debug/90197] [8/9 Regression] Cannot step through simple loop at -O -g
Date: Wed, 24 Apr 2019 13:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90197
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46238
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46238&action=edit
gcc9-pr90197-wip.patch
Untested WIP patch (for the C FE so far only, C++ needs something similar
though).
>From gcc-bugs-return-641712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 13:37:22 2019
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Subject: [Bug target/89093] [9 Regression] C++ exception handling clobbers d8 VFP register
Date: Wed, 24 Apr 2019 13:37:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #83 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed then.
>From gcc-bugs-return-641713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 13:40:22 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90227] [9 Regression] trunk rejects polymake since r269965
Date: Wed, 24 Apr 2019 13:40:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-24
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, unfortunately the originally submitted preprocessed source has been
hand-edited and so clang++ rejected it while g++ 8 still accepted it, I bet in
the category of what can but doesn't have to be diagnosed in uninstantiated
templates. I've hand-edited that back from original polymake sources so that
it compiled with clang++ and creduced again, verifying that it compiles without
errors with g++ 8 as well as clang++ and is rejected by g++ trunk this way.
The result is -std=c++14:
template <int b> struct c { static constexpr int d = b; typedef c e; };
template <bool, typename a> using f = a;
template <bool g> using h = c<g>;
template <int g> using i = c<g>;
template <typename...> struct ab {};
template <typename... j> struct k { using e = ab<j...>; };
template <typename> struct ad;
template <typename j, typename... l> struct ad<ab<j, l...>> { using e =
ab<l...>; };
template <typename> struct ae;
template <typename... m> struct ae<ab<m...>> : i<sizeof...(m)> {};
template <typename af, int, int = ae<af>::d> struct ag;
template <typename... m> struct ag<ab<m...>, 0, 0> { using e = ab<>; };
template <typename... m, int ah>
struct ag<ab<m...>, 0, ah> : k<typename ag<typename ad<ab<m...>>::e, ah -
1>::e> {};
template <typename... m, int ai, int ah>
struct ag<ab<m...>, ai, ah> : ag<typename ad<ab<m...>>::e, ai - 1> {};
template <typename, template <typename> class> struct aj;
template <typename... j, template <typename> class ak> struct aj<ab<j...>, ak>
{
using e = ab<typename ak<j>::e...>;
};
template <unsigned long> struct an;
struct ao { typedef an<0> ap; };
template <typename a, a...> struct aq {};
template <typename, typename = ao::ap> struct as;
template <typename a, unsigned long... at> struct as<a, an<at...>> { typedef
aq<a> ap; };
template <typename a, a> using au = typename as<a>::ap;
template <long... at> using av = aq<unsigned long, at...>;
template <long ar> using aw = au<unsigned long, ar>;
struct ay { using e = h<c<false>::d>; };
template <typename, template <typename> class, typename...>
struct bb : ay::e {};
struct bd { using e = av<>; };
struct bg { using e = bd::e; };
namespace bi {
enum bj { bk };
struct bo { enum n { bp }; };
struct bq { bool br; static const bo::n bs = bo::bp; };
template <typename bv> struct bw { using e = bv; };
template <typename, bj, int, typename...> class bx;
template <typename bv, bj by, int bz, typename... j, long... anchors>
struct bx<bv, by, bz, ab<j...>, av<anchors...>> : bo {
static const n bs = bv::bs;
static const long ca = sizeof bv::br;
using cb = int;
using cc = ab<j...>;
using cd = typename ag<cc, bz>::e;
using ce = typename ag<cc, bz>::e;
using cf = aw<ca>;
using cg = typename bw<bv>::e;
using ch = decltype(cg()(cb(), cd(), ce(), cf()));
};
class ck;
template <typename> struct cl : c<false> {};
template <typename bv, bj by, int bz, typename... j>
struct bx<bv, by, bz, ab<j...>> : public bx<bv, by, bz, typename aj<ab<j...>,
cl>::e, bg::e> {};
}
using bi::bj;
using bi::ck;
template <typename cn> class co {
template <typename p> co(p) { c<cn::bs>(); }
static co o;
};
namespace bi {
template <typename> class cp;
template <typename j> using cq = bb<j, cp>;
template <typename, typename cr> void cs(cr, f<cq<cr>::d, void *> = nullptr);
}
using bi::cs;
struct cu : bi::bq {
template <typename... cw, typename... cx>
auto operator()(int q, ab<cw...>, ab<cx...>, av<>) {
cs<cw...>(q);
}
};
template <>
co<bi::bx<cu, bj::bk, 1, ab<int, ck>>>
co<bi::bx<cu, bj::bk, 1, ab<int, ck>>>::o(0);
>From gcc-bugs-return-641714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 13:41:14 2019
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Subject: [Bug target/89952] S/390: Inconsistent CFI info when restoring frame pointer from fpr
Date: Wed, 24 Apr 2019 13:41:00 -0000
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--- Comment #2 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Wed Apr 24 13:40:38 2019
New Revision: 270544
URL: https://gcc.gnu.org/viewcvs?rev=270544&root=gcc&view=rev
Log:
S/390: Fix PR89952 incorrect CFI
This patch fixes a cases where inconsistent CFI is generated.
After restoring the hard frame pointer (r11) from an FPR we have to
set the CFA register. In order to be able to set it back to the stack
pointer (r15) we have to make sure that r15 has been restored already.
The patch also adds a scheduler dependency to prevent the instruction
scheduler from swapping the r11 and r15 restore again.
gcc/ChangeLog:
2019-04-24 Andreas Krebbel <krebbel@linux.ibm.com>
PR target/89952
* config/s390/s390.c (s390_restore_gprs_from_fprs): Restore GPRs
from FPRs in reverse order. Generate REG_CFA_DEF_CFA note also
for restored hard frame pointer.
(s390_sched_dependencies_evaluation): Implement new target hook.
(TARGET_SCHED_DEPENDENCIES_EVALUATION_HOOK): New macro definition.
gcc/testsuite/ChangeLog:
2019-04-24 Andreas Krebbel <krebbel@linux.ibm.com>
PR target/89952
* gcc.target/s390/pr89952.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/s390/pr89952.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-641715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 13:53:23 2019
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Subject: [Bug target/89952] S/390: Inconsistent CFI info when restoring frame pointer from fpr
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Andreas Krebbel <krebbel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Fixed upstream with the patch from comment #2
>From gcc-bugs-return-641716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 14:01:51 2019
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Subject: [Bug libstdc++/88888] Cannot construct filesystem::path from variable length array
Date: Wed, 24 Apr 2019 14:01:00 -0000
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ville.voutilainen at gmail dot com
--- Comment #3 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Work-around #3 looks splendidly sufficient to me, let's close this without
further extension-work into this wonderful overload set.
>From gcc-bugs-return-641717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 14:09:44 2019
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Subject: [Bug libstdc++/88888] Cannot construct filesystem::path from variable length array
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Agreed.
>From gcc-bugs-return-641718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 14:11:12 2019
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Subject: [Bug fortran/90230] New: newunit in open function is not threadsafe with openmp
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90230
Bug ID: 90230
Summary: newunit in open function is not threadsafe with openmp
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: mweiland at freenet dot de
Target Milestone: ---
Created attachment 46239
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46239&action=edit
Source file to reproduce the error
The issue can be reproduced with:
gfortran -c -fopenmp minimal.f90
gfortran -fopenmp minimal.o
./a.out
It yields:
opened file with lun: -10
At line 7 of file minimal.f90
Fortran runtime error: File already opened in another unit
It seems to me that the newunit feature of open() is not threadsafe.
I get the output:
opened file with lun: -11
At line 7 of file minimal.f90
Fortran runtime error: File already opened in another unit
Error termination. Backtrace:
...
With ifort/14.0 and NagCompiler, this example works, e.g.:
ifort -c -fopenmp minimal.f90
ifort -fopenmp minimal.o
./a.out
opened file with lun: -130
closed file with lun: -130
opened file with lun: -133
opened file with lun: -131
opened file with lun: -134
opened file with lun: -135
closed file with lun: -134
opened file with lun: -129
closed file with lun: -133
closed file with lun: -131
closed file with lun: -129
opened file with lun: -132
closed file with lun: -132
opened file with lun: -136
opened file with lun: -137
closed file with lun: -137
closed file with lun: -135
opened file with lun: -138
closed file with lun: -138
closed file with lun: -136
Not sure if this is really a bug, since I do not know if newunit is actually
supposed to be treadsafe from the Fortran standard.
>From gcc-bugs-return-641719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 14:18:13 2019
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Subject: [Bug d/88654] Hangs in libphobos testsuite
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88654
--- Comment #8 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Apr 24 14:17:34 2019
New Revision: 270545
URL: https://gcc.gnu.org/viewcvs?rev=270545&root=gcc&view=rev
Log:
libphobos: Skip curl tests if libcurl is not installed on the target.
libphobos/ChangeLog:
2019-04-24 Iain Buclaw <ibuclaw@gdcproject.org>
PR d/88654
* testsuite/lib/libphobos.exp (libphobos-dg-test): Check
libphobos_skipped_test_p before running test.
(libphobos-dg-prune): New proc.
(libphobos_init): Set libphobos_skip_tests.
(libphobos_skipped_test_p): New proc.
(check_effective_target_libcurl_available): New proc.
* testsuite/libphobos.phobos/phobos.exp: Skip curl tests if library
not found.
* testsuite/libphobos.phobos_shared/phobos_shared.exp: Likewise.
Modified:
trunk/libphobos/ChangeLog
trunk/libphobos/testsuite/lib/libphobos.exp
trunk/libphobos/testsuite/libphobos.phobos/phobos.exp
trunk/libphobos/testsuite/libphobos.phobos_shared/phobos_shared.exp
>From gcc-bugs-return-641720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 14:23:16 2019
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Subject: [Bug d/88654] Hangs in libphobos testsuite
Date: Wed, 24 Apr 2019 14:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88654
Iain Buclaw <ibuclaw at gdcproject dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Jakub Jelinek from comment #0)
> 3) and, if libcurl isn't available, I think it would be better to skip the
> test as UNSUPPORTED, i.e. add some effective-target that tests if libcurl is
> available and if it fails, don't even try to run the test
This has been done in r270545, nothing else left do here as far as I can see.
>From gcc-bugs-return-641721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 14:43:50 2019
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Subject: [Bug target/59888] Darwin linker error "illegal text-relocation" with -shared
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Zaak <zbeekman at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zbeekman at gmail dot com
--- Comment #15 from Zaak <zbeekman at gmail dot com> ---
This is preventing gtk-fortran from compiling on macOS with GCC 8.3, AFAICT.
cd /tmp/gtk-fortran-20190424-36870-ggjnvc/gtk-fortran-19.04.gtk3.24.8/build/src
&& /usr/local/Cellar/cmake/3.14.3/bin/cmake -E cmake_link_script
CMakeFiles/gtk-fortran_shared.dir/link.txt --verbose=1
/usr/local/bin/gfortran -pthread -O2 -fPIC -dynamiclib
-Wl,-headerpad_max_install_names -compatibility_version 0.1.0 -current_version
0.1.0 -o libgtk-3-fortran.0.1.dylib -install_name
@rpath/libgtk-3-fortran.0.1.dylib
CMakeFiles/gtk-fortran_object.dir/atk-auto.f90.o
CMakeFiles/gtk-fortran_object.dir/cairo-auto.f90.o
CMakeFiles/gtk-fortran_object.dir/gdk-auto.f90.o
CMakeFiles/gtk-fortran_object.dir/gdk-pixbuf-auto.f90.o
CMakeFiles/gtk-fortran_object.dir/glib-auto.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-container.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-button.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-entry.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-tree.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-menu.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-combobox.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-spin-slider.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-chooser.f90.o
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CMakeFiles/gtk-fortran_object.dir/gtk-hl-progress.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-accelerator.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-infobar.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-assistant.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-hl-misc.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-draw-hl.f90.o
CMakeFiles/gtk-fortran_object.dir/gtk-sup.f90.o
CMakeFiles/gtk-fortran_object.dir/gdk-pixbuf-hl.f90.o
CMakeFiles/gtk-fortran_object.dir/pango-auto.f90.o
CMakeFiles/gtk-fortran_object.dir/gdkevents-auto3.f90.o
CMakeFiles/gtk-fortran_object.dir/unixonly-auto.f90.o
-L/usr/local/Cellar/plplot/5.14.0_1/lib
-Wl,-rpath,/usr/local/Cellar/plplot/5.14.0_1/lib
/usr/local/lib/libatk-1.0.dylib /usr/local/lib/libcairo.dylib
/usr/local/lib/libgdk-3.0.dylib /usr/local/lib/libgdk_pixbuf-2.0.dylib
/usr/local/lib/libglib-2.0.dylib /usr/local/lib/libgio-2.0.dylib
/usr/local/lib/libgobject-2.0.dylib /usr/local/lib/libgtk-3.0.dylib
/usr/local/lib/libpango-1.0.dylib
ld: illegal text-relocation to '_hl_gtk_listn_edit_cb' in
CMakeFiles/gtk-fortran_object.dir/gtk-hl-tree.f90.o from 'lC72' in
CMakeFiles/gtk-fortran_object.dir/gtk-hl-tree.f90.o for architecture x86_64
collect2: error: ld returned 1 exit status
make[2]: *** [src/libgtk-3-fortran.0.1.dylib] Error 1
make[1]: *** [src/CMakeFiles/gtk-fortran_shared.dir/all] Error 2
make: *** [all] Error 2
>From gcc-bugs-return-641722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 14:58:06 2019
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Subject: [Bug target/88496] Unnecessary stack adjustment with -mavx512f
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
From PR 90202:
[hjl@gnu-cfl-1 pr90202]$ cat x.ii
struct v {
int val[16];
};
struct v test(struct v a, struct v b) {
struct v res;
for (int i = 0; i < 16; i++)
res.val[i] = a.val[i] + b.val[i];
return res;
}
[hjl@gnu-cfl-1 pr90202]$ make CC=gcc
gcc -O3 -march=skylake -S x.ii
[hjl@gnu-cfl-1 pr90202]$ cat x.s
.file "x.ii"
.text
.p2align 4,,15
.globl _Z4test1vS_
.type _Z4test1vS_, @function
_Z4test1vS_:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rdi, %rax
movq %rsp, %rbp
.cfi_def_cfa_register 6
vmovdqu 16(%rbp), %ymm1
vmovdqu 48(%rbp), %ymm2
vpaddd 80(%rbp), %ymm1, %ymm0
vmovdqu %ymm0, (%rdi)
vpaddd 112(%rbp), %ymm2, %ymm0
vmovdqu %ymm0, 32(%rdi)
vzeroupper
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
>From gcc-bugs-return-641723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 15:03:45 2019
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90231] New: ivopts causes <optimized away> iterator in the loop
Date: Wed, 24 Apr 2019 15:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90231
Bug ID: 90231
Summary: ivopts causes <optimized away> iterator in the loop
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Keywords: wrong-debug
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
CC: aoliva at gcc dot gnu.org, jakub at gcc dot gnu.org,
rguenth at gcc dot gnu.org, rsandifo at gcc dot gnu.org,
unassigned at gcc dot gnu.org
Depends on: 90197
Target Milestone: ---
+++ This bug was initially created as a clone of Bug #90197 +++
In the PR90197 testcase with -g -O2 ivopts results in bad debug info quality,
at least on x86_64-linux.
__attribute__((noipa))
void
test (unsigned int *dst, unsigned int base, int count)
{
for (int i = 0; i < count; ++i, base += 15)
dst[i] = base;
}
int
main (void)
{
unsigned int dst[100];
test (dst, 0x4000, 100);
}
Before ivopts pass, the IL is:
<bb 5> [local count: 105119324]:
<bb 3> [local count: 955630224]:
# base_17 = PHI <base_7(D)(5), base_13(6)>
# i_18 = PHI <0(5), i_12(6)>
# DEBUG i => i_18
# DEBUG base => base_17
# DEBUG BEGIN_STMT
_1 = (long unsigned int) i_18;
_2 = _1 * 4;
_3 = dst_10(D) + _2;
*_3 = base_17;
# DEBUG BEGIN_STMT
i_12 = i_18 + 1;
# DEBUG i => i_12
base_13 = base_17 + 15;
# DEBUG base => base_13
# DEBUG i => i_12
# DEBUG base => base_13
# DEBUG BEGIN_STMT
if (count_9(D) > i_12)
goto <bb 6>; [89.00%]
else
goto <bb 4>; [11.00%]
<bb 6> [local count: 850510900]:
goto <bb 3>; [100.00%]
The IVOPTS pass keeps the base IV and replaces the i IV with a different one:
<bb 5> [local count: 105119324]:
ivtmp.11_5 = (unsigned long) dst_10(D);
_16 = (unsigned int) count_9(D);
_15 = _16 * 15;
_14 = base_7(D) + _15;
<bb 3> [local count: 955630224]:
# base_17 = PHI <base_7(D)(5), base_13(6)>
# ivtmp.11_20 = PHI <ivtmp.11_5(5), ivtmp.11_6(6)>
# DEBUG i => NULL
# DEBUG base => base_17
# DEBUG BEGIN_STMT
_4 = (void *) ivtmp.11_20;
MEM[base: _4, offset: 0B] = base_17;
# DEBUG BEGIN_STMT
# DEBUG D#1 => NULL
# DEBUG i => D#1
base_13 = base_17 + 15;
# DEBUG base => base_13
# DEBUG i => D#1
# DEBUG base => base_13
# DEBUG BEGIN_STMT
ivtmp.11_6 = ivtmp.11_20 + 4;
if (base_13 != _14)
goto <bb 6>; [89.00%]
else
goto <bb 4>; [11.00%]
<bb 6> [local count: 850510900]:
goto <bb 3>; [100.00%]
The problem is that i => NULL and D#1 => NULL; while we don't have any register
holding the i value at runtime through iterations of the loop, I would hope
that ivopts pass has enough information on how to express one IV from another
IV and should be able to emit that information in a form of debug stmts into
the IL. In this case, I guess it can either say that the i at the beginning of
the loop is either (int) ((ivtmp.11_20 - (unsigned long) dst_10(D)) / 4), or
(int) ((base_17 - base_7(D)) / 15). Even if those dst_10(D) or base_7(D)
aren't really used later in the function (that is the case of both in this
function), those can be still live in some register (e.g. count argument is
live in a register) or memory and even if it doesn't, in some cases it could be
expressed through DW_OP_entry_value (the callers sets those up in this
testcase).
It could be as simple as replacing the debug uses of i_18 (the IV that is going
away) with a debug temp decl, either
# DEBUG D#2 = ivtmp.11_20 - ivtmp.11_5
# DEBUG D#3 = D#2 / 4
# DEBUG i => D#3
or similar and let the normal debug handling code do the rest when ivtmp.11_5
is no longer needed or optimized away etc.
I guess one needs to properly think if the to be removed IV is actually
properly expressible through some other IV, in the ivtmp case when that one is
64-bit and the IV is 32-bit and division just by 4 that is clearly the case, in
other cases we could use assumption that signed integer overflow is UB etc.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90197
[Bug 90197] [8/9 Regression] Cannot step through simple loop at -O -g
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Subject: [Bug debug/90231] ivopts causes <optimized away> iterator in the loop
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
Version|8.3.1 |9.0
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Alex or Bin, could you please have a look into this during GCC 10 stage1?
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/89432] FAIL: libphobos.unittests/druntime/{static,shared}/core.time on CentOS 5.11, Linux 2.6.18
Date: Wed, 24 Apr 2019 15:08:00 -0000
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--- Comment #5 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Created attachment 46240
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46240&action=edit
patch for pr89432
(In reply to Uroš Bizjak from comment #4)
> Created attachment 46182 [details]
> Proposed patch
>
> Attached patch introduces DRUNTIME_OS_LINUX_PRE_2639 function that detects
> linux version < 2.6.39 and sets LINUX_PRE_2639_FLAG. However, as shown in
> the Comment #0, CentOS 5.11 (kernel 2.6.18) lacks several other clock types
> besides CLOCK_BOOTTIME, so the patch does not fix the failure for these
> older kernels.
>
> I doubt it is worth pushing this any further, so I'll just attach the patch
> here for reference.
Now that the unit-test runner has been hauled out properly into dejagnu, I was
thinking of this being the better way.
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Subject: [Bug c++/90227] [9 Regression] trunk rejects polymake since r269965
Date: Wed, 24 Apr 2019 15:15:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
icc also accepts #c1 with -std=c++14.
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Subject: [Bug libstdc++/90220] std::any_cast misbehaves for function and array types
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 24 15:17:43 2019
New Revision: 270547
URL: https://gcc.gnu.org/viewcvs?rev=270547&root=gcc&view=rev
Log:
PR libstdc++/90220 Fix std::any_cast for array types
Although the std::any constructors use decay_t to determine the type of
the contained value, std::any_cast should use the un-decayed type (and
so always fail for function and array types that decay to pointers).
Using remove_cv_t is correct, because the condition for std::any_cast
to return non-null is operand.type() == typeid(T) and typeid ignores
top-level cv-qualifiers.
PR libstdc++/90220
* include/std/any (__any_caster): Use remove_cv_t instead of decay_t.
Avoid a runtime check for types that can never be stored in std::any.
* testsuite/20_util/any/misc/any_cast.cc: Test std::any_cast with
array types.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/any
trunk/libstdc++-v3/testsuite/20_util/any/misc/any_cast.cc
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Subject: [Bug libstdc++/90220] std::any_cast misbehaves for function and array types
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Both examples are fixed on trunk. I plan to backport the fixes.
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Subject: [Bug debug/90231] ivopts causes <optimized away> iterator in the loop
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--- Comment #2 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
that's a known (to me) problem; it's mentioned in the gOlogy report, and IIRC I
even highlighted it in the slides about it
I spent some time looking for a low-hanging fix a while ago, but came out
empty-handed
a fix will likely take involvement by someone a lot more familiar with ivopts
than I am (or putting in the time required to become one ;-)
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Subject: [Bug debug/90232] New: gcc drops top-level dies with -fdebug-types-section
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90232
Bug ID: 90232
Summary: gcc drops top-level dies with -fdebug-types-section
Product: gcc
Version: 9.0
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[ Spinoff bug from gdb PR
https://sourceware.org/bugzilla/show_bug.cgi?id=14148#c3 ]
Consider two-file test-case 36:
...
$ cat 36.c
struct s { int i; };
extern void f (void);
int main (void) {
struct s a;
f ();
return 0;
}
$ cat 36b.c
struct s { int j; };
void f (void) {
struct s b;
}
...
Compiled like this:
...
$ gcc -fdebug-types-section -o 36 36.c 36b.c -Wall -g
...
Without -fdebug-types-section, for 36.c we have the struct type s as top-level
die, and as type of main variable a:
...
<0><d2>: Abbrev Number: 1 (DW_TAG_compile_unit)
<d8> DW_AT_name : (indirect string, offset: 0x1f8): 36.c
<1><f4>: Abbrev Number: 2 (DW_TAG_structure_type)
<f5> DW_AT_name : s
<1><112>: Abbrev Number: 5 (DW_TAG_subprogram)
<113> DW_AT_name : (indirect string, offset: 0x1fd): main
<2><130>: Abbrev Number: 6 (DW_TAG_variable)
<131> DW_AT_name : a
<136> DW_AT_type : <0xf4>
...
with the same pattern for 36b.c:
...
<0><14a>: Abbrev Number: 1 (DW_TAG_compile_unit)
<150> DW_AT_name : (indirect string, offset: 0x261): 36b.c
<1><16c>: Abbrev Number: 2 (DW_TAG_structure_type)
<16d> DW_AT_name : s
<1><18a>: Abbrev Number: 5 (DW_TAG_subprogram)
<18b> DW_AT_name : f
<2><1a2>: Abbrev Number: 6 (DW_TAG_variable)
<1a3> DW_AT_name : b
<1a8> DW_AT_type : <0x16c>
...
With -fdebug-types-section, we have struct s in .debug_types with only a
reference from the variable for 36.c:
...
<1><fb>: Abbrev Number: 6 (DW_TAG_subprogram)
<fc> DW_AT_name : (indirect string, offset: 0x272): main
<2><119>: Abbrev Number: 7 (DW_TAG_variable)
<11a> DW_AT_name : a
<11f> DW_AT_type : signature: 0xfd1462823bb6f7b7
Contents of the .debug_types section:
Signature: 0xfd1462823bb6f7b7
<1><1d>: Abbrev Number: 2 (DW_TAG_structure_type)
<1e> DW_AT_name : s
...
and the same for 36b.c:
...
<1><160>: Abbrev Number: 6 (DW_TAG_subprogram)
<161> DW_AT_name : f
<2><178>: Abbrev Number: 7 (DW_TAG_variable)
<179> DW_AT_name : b
<17e> DW_AT_type : signature: 0x534310fbefba324d
Contents of the .debug_types section:
Signature: 0x534310fbefba324d
<1><59>: Abbrev Number: 2 (DW_TAG_structure_type)
<5a> DW_AT_name : s
...
So, AFAICT gcc drops the top-level struct s dies.
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Subject: [Bug debug/90231] ivopts causes <optimized away> iterator in the loop
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90231
--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> ---
On April 24, 2019 5:04:37 PM GMT+02:00, "jakub at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90231
>
>Jakub Jelinek <jakub at gcc dot gnu.org> changed:
>
> What |Removed |Added
>----------------------------------------------------------------------------
> CC| |amker at gcc dot gnu.org
> Version|8.3.1 |9.0
>
>--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
>Alex or Bin, could you please have a look into this during GCC 10
>stage1?
Might be also an issue of IVOs own DCE not working in optimal order for debug
temp creation.
>From gcc-bugs-return-641732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 15:33:58 2019
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Subject: [Bug debug/90232] gcc drops top-level dies with -fdebug-types-section
Date: Wed, 24 Apr 2019 15:33:00 -0000
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
With this demonstrator patch:
...
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index b9a624e1ac7..1e818973fae 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -8400,10 +8400,11 @@ generate_skeleton (dw_die_ref die)
/* If this type definition is nested inside another type,
and is not an instantiation of a template, always leave
at least a declaration in its place. */
- if (die->die_parent != NULL
- && is_type_die (die->die_parent)
- && !is_template_instantiation (die))
- node.new_die = clone_as_declaration (die);
+ if (true || (die->die_parent != NULL
+ && is_type_die (die->die_parent)
+ && !is_template_instantiation (die)))
+ node.new_die = clone_as_declaration (die);
+ node.new_die->die_perennial_p = 1;
generate_skeleton_bottom_up (&node);
return node.new_die;
...
instead we get the desired:
...
<0><d2>: Abbrev Number: 5 (DW_TAG_compile_unit)
<d8> DW_AT_name : (indirect string, offset: 0x1f8): 36.c
<1><f4>: Abbrev Number: 6 (DW_TAG_structure_type)
<f5> DW_AT_name : s
<f7> DW_AT_signature : signature: 0xfd1462823bb6f7b7
<1><106>: Abbrev Number: 7 (DW_TAG_subprogram)
<107> DW_AT_name : (indirect string, offset: 0x2b8): main
<2><124>: Abbrev Number: 8 (DW_TAG_variable)
<125> DW_AT_name : a
<12a> DW_AT_type : <0xf4>
Contents of the .debug_types section:
Signature: 0xfd1462823bb6f7b7
<1><1d>: Abbrev Number: 2 (DW_TAG_structure_type)
<1e> DW_AT_name : s
...
and:
...
<0><13e>: Abbrev Number: 5 (DW_TAG_compile_unit)
<144> DW_AT_name : (indirect string, offset: 0x2bd): 36b.c
<1><160>: Abbrev Number: 6 (DW_TAG_structure_type)
<161> DW_AT_name : s
<163> DW_AT_signature : signature: 0x534310fbefba324d
<1><172>: Abbrev Number: 7 (DW_TAG_subprogram)
<173> DW_AT_name : f
<2><18a>: Abbrev Number: 8 (DW_TAG_variable)
<18b> DW_AT_name : b
Contents of the .debug_types section:
Signature: 0x534310fbefba324d
<1><59>: Abbrev Number: 2 (DW_TAG_structure_type)
<5a> DW_AT_name : s
...
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Subject: [Bug libstdc++/90233] New: std::hash<long double>()(INFINITY) == std::hash<long double>()(0)
Date: Wed, 24 Apr 2019 15:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90233
Bug ID: 90233
Summary: std::hash<long double>()(INFINITY) == std::hash<long
double>()(0)
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
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Reporter: redi at gcc dot gnu.org
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#include <functional>
#include <iostream>
#include <cmath>
int main()
{
std::hash<double> hd;
std::hash<long double> hl;
std::cout << hd(0) << ' ' << hd(INFINITY) << ' ' << hd(-INFINITY) << '\n';
std::cout << hl(0) << ' ' << hl(INFINITY) << ' ' << hl(-INFINITY) << '\n';
}
Output:
0 3377428025507081056 6848127736350075394
0 0 0
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Subject: [Bug target/90193] [8/9 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 24 15:49:36 2019
New Revision: 270550
URL: https://gcc.gnu.org/viewcvs?rev=270550&root=gcc&view=rev
Log:
PR target/90193
* rtl.c (classify_insn): Return JUMP_INSN for asm goto.
* emit-rtl.c (try_split): Copy over REG_LABEL_TARGET.
* gcc.target/i386/pr90193.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr90193.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/emit-rtl.c
trunk/gcc/rtl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/90193] [8 Regression] asm goto with TLS "m" input operand generates incorrect assembler in O1 and O2
Date: Wed, 24 Apr 2019 15:51:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |9.0
Summary|[8/9 Regression] asm goto |[8 Regression] asm goto
|with TLS "m" input operand |with TLS "m" input operand
|generates incorrect |generates incorrect
|assembler in O1 and O2 |assembler in O1 and O2
Known to fail|9.0 |
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed on the trunk so far.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/90234] New: 503.bwaves_r is 6% slower on Zen CPUs at -Ofast with native march/mtune than with generic ones
Date: Wed, 24 Apr 2019 15:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90234
Bug ID: 90234
Summary: 503.bwaves_r is 6% slower on Zen CPUs at -Ofast with
native march/mtune than with generic ones
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org
Blocks: 26163
Target Milestone: ---
Host: x86_64-linux
Target: x86_64-linux
In my experiments on an EPYC CPU and GCC trunk r270364, 503.bwaves_r
is over 6% slower at -Ofast when I supply -march=native =mtune=native
than when I compile for generic x86_64. LNT sees 3.55% regression
too: https://lnt.opensuse.org/db_default/v4/SPEC/spec_report/tuning
perf stat and report of the generic (fast) binary run:
Performance counter stats for 'numactl -C 0 -l specinvoke':
240411.714022 task-clock:u (msec) # 0.999 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
35189 page-faults:u # 0.146 K/sec
757727387955 cycles:u # 3.152 GHz
(83.32%)
40175950077 stalled-cycles-frontend:u # 5.30% frontend cycles
idle (83.31%)
91872393105 stalled-cycles-backend:u # 12.12% backend cycles
idle (83.37%)
2177387522561 instructions:u # 2.87 insn per cycle
# 0.04 stalled cycles per
insn (83.32%)
98299602685 branches:u # 408.880 M/sec
(83.32%)
131591436 branch-misses:u # 0.13% of all branches
(83.36%)
240.668052943 seconds time elapsed
# Samples: 960K of event 'cycles'
# Event count (approx.): 755626377551
#
# Overhead Samples Command Shared Object Symbol
# ........ ........ ........ ................. ........................
#
62.10% 595840 bwaves_r bwaves_r_peak-gen mat_times_vec_
13.91% 133958 bwaves_r bwaves_r_peak-gen shell_
12.40% 119012 bwaves_r bwaves_r_peak-gen bi_cgstab_block_
7.81% 75246 bwaves_r bwaves_r_peak-gen jacobian_
2.11% 20290 bwaves_r bwaves_r_peak-gen flux_
1.27% 12217 bwaves_r libc-2.29.so __memset_avx2_unaligned
perf stat and report of the native (slow) binary run:
Performance counter stats for 'numactl -C 0 -l specinvoke':
255695.249393 task-clock:u (msec) # 0.999 CPUs utilized
0 context-switches:u # 0.000 K/sec
0 cpu-migrations:u # 0.000 K/sec
35604 page-faults:u # 0.139 K/sec
800619530480 cycles:u # 3.131 GHz
(83.32%)
77320365388 stalled-cycles-frontend:u # 9.66% frontend cycles
idle (83.34%)
93389410778 stalled-cycles-backend:u # 11.66% backend cycles
idle (83.33%)
1821704428841 instructions:u # 2.28 insn per cycle
# 0.05 stalled cycles per
insn (83.32%)
99885762475 branches:u # 390.644 M/sec
(83.34%)
130710907 branch-misses:u # 0.13% of all branches
(83.34%)
255.958363704 seconds time elapsed
# Samples: 1M of event 'cycles'
# Event count (approx.): 804011318580
#
# Overhead Samples Command Shared Object Symbol
# ........ ........ ........ ................. ........................
#
64.87% 662574 bwaves_r bwaves_r_peak-nat mat_times_vec_
12.75% 130756 bwaves_r bwaves_r_peak-nat shell_
11.48% 117266 bwaves_r bwaves_r_peak-nat bi_cgstab_block_
7.45% 76415 bwaves_r bwaves_r_peak-nat jacobian_
1.92% 19701 bwaves_r bwaves_r_peak-nat flux_
1.34% 13662 bwaves_r libc-2.29.so __memset_avx2_unaligned
Examining the slow mat_times_vec_ further, perf claims that the
following loop is the most sample-heavy:
0.01 |6c0:+->vmulpd (%r8,%rax,1),%xmm9,%xmm0
4.34 | | vandnp (%r10,%rax,1),%xmm2,%xmm1
0.83 | | vfmadd (%r15,%rax,1),%xmm11,%xmm1
1.35 | | vfmadd (%r14,%rax,1),%xmm10,%xmm0
5.85 | | vaddpd %xmm1,%xmm0,%xmm1
7.41 | | vmulpd (%rsi,%rax,1),%xmm7,%xmm0
2.19 | | vfmadd (%rdi,%rax,1),%xmm8,%xmm0
3.97 | | vmovap %xmm0,%xmm12
0.07 | | vmulpd (%r11,%rax,1),%xmm5,%xmm0
0.93 | | vfmadd (%rcx,%rax,1),%xmm6,%xmm0
1.92 | | vaddpd %xmm12,%xmm0,%xmm0
6.34 | | vaddpd %xmm1,%xmm0,%xmm0
9.58 | | vmovup %xmm0,(%r10,%rax,1)
0.49 | | add $0x10,%rax
0.05 | | cmp %rax,0x38(%rsp)
0.02 | +--jne 6c0
Objdump perhaps gives a better idea about exactly which instructions
these are:
4011c0: c4 c1 31 59 04 00 vmulpd (%r8,%rax,1),%xmm9,%xmm0
4011c6: c4 c1 68 55 0c 02 vandnps (%r10,%rax,1),%xmm2,%xmm1
4011cc: c4 c2 a1 b8 0c 07 vfmadd231pd (%r15,%rax,1),%xmm11,%xmm1
4011d2: c4 c2 a9 b8 04 06 vfmadd231pd (%r14,%rax,1),%xmm10,%xmm0
4011d8: c5 f9 58 c9 vaddpd %xmm1,%xmm0,%xmm1
4011dc: c5 c1 59 04 06 vmulpd (%rsi,%rax,1),%xmm7,%xmm0
4011e1: c4 e2 b9 b8 04 07 vfmadd231pd (%rdi,%rax,1),%xmm8,%xmm0
4011e7: c5 78 28 e0 vmovaps %xmm0,%xmm12
4011eb: c4 c1 51 59 04 03 vmulpd (%r11,%rax,1),%xmm5,%xmm0
4011f1: c4 e2 c9 b8 04 01 vfmadd231pd (%rcx,%rax,1),%xmm6,%xmm0
4011f7: c4 c1 79 58 c4 vaddpd %xmm12,%xmm0,%xmm0
4011fc: c5 f9 58 c1 vaddpd %xmm1,%xmm0,%xmm0
401200: c4 c1 78 11 04 02 vmovups %xmm0,(%r10,%rax,1)
401206: 48 83 c0 10 add $0x10,%rax
40120a: 48 39 44 24 38 cmp %rax,0x38(%rsp)
40120f: 75 af jne 4011c0 <mat_times_vec_+0x6c0>
I did a quick experiment with completely disabling FMA generation but
it did not help.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
>From gcc-bugs-return-641737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 16:13:27 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/90233] std::hash<long double>()(INFINITY) == std::hash<long double>()(0)
Date: Wed, 24 Apr 2019 16:13:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
frexpl documentation says:
If x is positive infinity (negative infinity), positive infinity (negative
infinity) is returned, and the value of *exp is unspecified.
Ditto for NaN (if std::hash<long double>::operator() needs to be meaningful for
NaNs too).
Perhaps frexpl should be only used if isfinite and do something else otherwise?
>From gcc-bugs-return-641738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 16:18:52 2019
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/90235] New: Unnecessary save and restore frame pointer with AVX/AVX512 pseudo registers
Date: Wed, 24 Apr 2019 16:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90235
Bug ID: 90235
Summary: Unnecessary save and restore frame pointer with
AVX/AVX512 pseudo registers
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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CC: crazylht at gmail dot com, skpgkp1 at gmail dot com
Target Milestone: ---
From PR 90202:
[hjl@gnu-cfl-1 pr90202]$ cat x.ii
struct v {
int val[16];
};
struct v test(struct v a, struct v b) {
struct v res;
for (int i = 0; i < 16; i++)
res.val[i] = a.val[i] + b.val[i];
return res;
}
[hjl@gnu-cfl-1 pr90202]$ make CC=gcc
gcc -O3 -march=skylake -S x.ii
[hjl@gnu-cfl-1 pr90202]$ cat x.s
.file "x.ii"
.text
.p2align 4,,15
.globl _Z4test1vS_
.type _Z4test1vS_, @function
_Z4test1vS_:
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rdi, %rax
movq %rsp, %rbp
.cfi_def_cfa_register 6
vmovdqu 16(%rbp), %ymm1
vmovdqu 48(%rbp), %ymm2
vpaddd 80(%rbp), %ymm1, %ymm0
vmovdqu %ymm0, (%rdi)
vpaddd 112(%rbp), %ymm2, %ymm0
vmovdqu %ymm0, 32(%rdi)
vzeroupper
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
Since there is
rtx
gen_reg_rtx (machine_mode mode)
{
rtx val;
unsigned int align = GET_MODE_ALIGNMENT (mode);
gcc_assert (can_create_pseudo_p ());
/* If a virtual register with bigger mode alignment is generated,
increase stack alignment estimation because it might be spilled
to stack later. */
if (SUPPORTS_STACK_ALIGNMENT
&& crtl->stack_alignment_estimated < align
&& !crtl->stack_realign_processed)
{
unsigned int min_align = MINIMUM_ALIGNMENT (NULL, mode, align);
if (crtl->stack_alignment_estimated < min_align)
crtl->stack_alignment_estimated = min_align;
}
and IRA has
frame_pointer_needed
= (! flag_omit_frame_pointer
|| (cfun->calls_alloca && EXIT_IGNORE_STACK)
/* We need the frame pointer to catch stack overflow exceptions if
the stack pointer is moving (as for the alloca case just above). */
|| (STACK_CHECK_MOVING_SP
&& flag_stack_check
&& flag_exceptions
&& cfun->can_throw_non_call_exceptions)
|| crtl->accesses_prior_frames
|| (SUPPORTS_STACK_ALIGNMENT && crtl->stack_realign_needed)
|| targetm.frame_pointer_required ());
generate AVX/AVX512 pseudo registers via gen_reg_rtx will mark frame
pointer as needed. Stack realignment is needed to
1. Align the outgoing stack.
2. Support aligned spill of AVX/AVX512 registers.
But we won't know if spill is needed before RA. As the result, we
save and restore frame pointer even if not needed. Since
(define_insn "mov<mode>_internal"
[(set (match_operand:VMOVE 0 "nonimmediate_operand"
"=v,v ,v ,m")
(match_operand:VMOVE 1 "nonimmediate_or_sse_const_operand"
" C,BC,vm,v"))]
"TARGET_SSE
&& (register_operand (operands[0], <MODE>mode)
|| register_operand (operands[1], <MODE>mode))"
now supports both aligned and unaligned load/store of AVX/AVX512
registers, we can change gen_reg_rtx to
/* If a virtual register with bigger mode alignment is generated,
increase stack alignment estimation because it might be spilled
to stack later. */
if (SUPPORTS_STACK_ALIGNMENT
&& !SUPPORTS_MISALIGNED_SPILL
&& crtl->stack_alignment_estimated < align
&& !crtl->stack_realign_processed)
{
unsigned int min_align = MINIMUM_ALIGNMENT (NULL, mode, align);
if (crtl->stack_alignment_estimated < min_align)
crtl->stack_alignment_estimated = min_align;
}
>From gcc-bugs-return-641739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 16:30:45 2019
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Subject: [Bug libstdc++/90233] std::hash<long double>()(INFINITY) == std::hash<long double>()(0)
Date: Wed, 24 Apr 2019 16:30:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> Perhaps frexpl should be only used if isfinite and do something else
> otherwise?
Yes, I think that makes sense.
The standard doesn't require different values for 0.0 and INFINITY but I think
we should do it for QoI.
>From gcc-bugs-return-641740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 16:35:43 2019
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Subject: [Bug libffi/90146] Add support for NetBSD
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The second patch looks really weird, ld, ldblit () and LDBL_EPSILON already do
(or the last one should, unless NetBSD float.h is buggy) have long double type,
so there is no point in casting it to long double again.
>From gcc-bugs-return-641741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 16:53:41 2019
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Subject: [Bug c++/82171] Cant use std::declval in concept testing map operator[]
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Casey Carter <Casey at Carter dot net> changed:
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--- Comment #4 from Casey Carter <Casey at Carter dot net> ---
Likely a duplicate of 68781.
>From gcc-bugs-return-641742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 17:54:58 2019
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/90231] ivopts causes <optimized away> iterator in the loop
Date: Wed, 24 Apr 2019 17:54:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think the order doesn't matter in this case, as debug stmts can't have PHIs
ATM and that is what you either immediately or soonish end up with.
The only thing it changes is IMHO whether the D#1 appears in there or whether
the second DEBUG i => is reset immediately, if you remove from end to start of
the bb, then you first create D#1 that is the phi result + const and then reset
that as it still refers to the PHI result, otherwise if you first remove the
PHI result, you just reset whatever it refers to it.
The point is that ivopts knows better and should before the removal of the IV
remap it in debug stmt to something else.
>From gcc-bugs-return-641743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 18:58:12 2019
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Subject: [Bug d/89432] FAIL: libphobos.unittests/druntime/{static,shared}/core.time on CentOS 5.11, Linux 2.6.18
Date: Wed, 24 Apr 2019 18:58:00 -0000
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--- Comment #6 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Apr 24 18:57:36 2019
New Revision: 270554
URL: https://gcc.gnu.org/viewcvs?rev=270554&root=gcc&view=rev
Log:
libphobos: Fix FAIL phobos.exp/core.time on CentOS 5.11, Linux 2.6.18
Merges upstream druntime e03164b5.
Reviewed-on: https://github.com/dlang/druntime/pull/2581
libphobos/ChangeLog:
2019-04-24 Iain Buclaw <ibuclaw@gdcproject.org>
PR d/89432
* testsuite/lib/libphobos.exp (check_effective_target_linux_pre_2639):
New proc.
* testsuite/libphobos.druntime/druntime.exp: Add compiler flag
-fversion=Linux_Pre_2639 if target is linux_pre_2639.
* testsuite/libphobos.druntime_shared/druntime_shared.exp: Likewise.
Modified:
trunk/libphobos/ChangeLog
trunk/libphobos/libdruntime/MERGE
trunk/libphobos/libdruntime/core/time.d
trunk/libphobos/testsuite/lib/libphobos.exp
trunk/libphobos/testsuite/libphobos.druntime/druntime.exp
trunk/libphobos/testsuite/libphobos.druntime_shared/druntime_shared.exp
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90236] New: bogus error with auto non-type template argument
Date: Wed, 24 Apr 2019 18:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90236
Bug ID: 90236
Summary: bogus error with auto non-type template argument
Product: gcc
Version: 8.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
Compiling this with g++8 and -std=c++17
struct foo { };
template <const auto &> void fnc() { }
void
test()
{
static constexpr foo a;
fnc<a>();
}
results in
r.cc: In function ‘void test()’:
r.cc:9:10: error: no matching function for call to ‘fnc<a>()’
fnc<a>();
^
r.cc:3:30: note: candidate: ‘template<const auto& <anonymous> > void fnc()’
template <const auto &> void fnc() { }
^~~
r.cc:3:30: note: template argument deduction/substitution failed:
r.cc:9:10: error: ‘a’ is not a valid template argument for type ‘const foo&’
because object ‘a’ does not have linkage
fnc<a>();
^
This doesn't happen on trunk since r265789, so maybe we need to apply parts of
that commit to 8.
>From gcc-bugs-return-641745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 18:59:48 2019
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/90236] bogus error with auto non-type template argument
Date: Wed, 24 Apr 2019 18:59:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Target Milestone|--- |7.5
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
g++7 also fails the same.
(Thanks Hana for providing the testcase!)
>From gcc-bugs-return-641746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 19:09:26 2019
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From: "austin.card at torchtechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/90186] optimizing options -O1 and -O2 produce different results
Date: Wed, 24 Apr 2019 19:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90186
--- Comment #2 from austin.card at torchtechnologies dot com ---
(In reply to Richard Biener from comment #1)
> Note that using #pragma pack(1) on struct Ipv4 makes u_short members not
> naturally aligned and thus code like
>
> void UpdateChecksum()
> {
> u_long sum(0);
>
> SetChecksum(0);
>
> u_short *buf = (u_short*)ip->Payload();
> u_long nwords = ip->PayloadSize() / 2;
>
> for (unsigned i = 0; i < nwords; ++i)
> {
>
> sum += ntohs(*buf++);
>
> dereferences pointers to u_short that might not be aligned to a 2 byte
> boundary.
>
> Confirmed though, even when using -fno-inline. -fno-strict-aliasing fixes
> it. Possibly the very same issue above - using u_short * to access memory
> with a different dynamic type. The same happens here:
>
> buf = (u_short*)&ph;
> nwords = 6;
>
> for (unsigned i = 0; i < nwords; ++i)
> {
>
> sum += ntohs(*buf++);
>
> ph is of type PseudoHeader. You cannot use lvalues of type u_short to
> refer to them.
So if this is an alignment issue, How does the #pragma pack(1) change the
alignment differently between option -O1 and -O2? Also in Udp.h if I uncomment
the dummy function at line 147, then the code produces the same output between
-O1 and -O2.
I have tried to produce the same result with other compilers:
clang++ -std=c+11 -O2 -o CheckSum main.cpp CheckSum.cpp
clang++ -std=c+11 -O1 -o CheckSum main.cpp CheckSum.cpp
does not have this problem.
And Microsoft VS2017 compiler does not have this problem between Debug and
Release.
Lastly, the code provided is computing the 16-bit checksum of a UDP packet
header contained in an IPv4 network packet. While the comment regarding
alignment of u_short members is in general correct, any misaligned members are
intended by the RFC standards.
>From gcc-bugs-return-641747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 19:26:51 2019
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Subject: [Bug d/89432] FAIL: libphobos.unittests/druntime/{static,shared}/core.time on CentOS 5.11, Linux 2.6.18
Date: Wed, 24 Apr 2019 19:26:00 -0000
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Iain Buclaw <ibuclaw at gdcproject dot org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Upstream druntime has been patched to assume that only CLOCK_MONOTONIC and
CLOCK_REALTIME exist on linux versions older than 2.6.39.
Applied the fix, as well as what I posted to r270554.
>From gcc-bugs-return-641748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 19:32:46 2019
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Subject: [Bug bootstrap/89864] gcc fails to build/bootstrap with XCode 10.2
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--- Comment #89 from Zaak <zbeekman at gmail dot com> ---
Anyone have a patch for 4.9? A user wants one, but I can't build 4.9 from
source on Mojave.
>From gcc-bugs-return-641749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 24 20:34:03 2019
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To: <gcc-bugs@gcc.gnu.org>
Subject: Mortgage Industry Professionals
Date: Wed, 24 Apr 2019 20:34:00 -0000
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