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* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
@ 2012-07-05 10:10 ` redi at gcc dot gnu.org
2012-11-18 13:41 ` paolo.carlini at oracle dot com
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: redi at gcc dot gnu.org @ 2012-07-05 10:10 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2009-11-05 22:41:18 |2012-07-05
CC| |redi at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-05 10:10:40 UTC ---
That causes G++ to get the wrong results for the last two examples in 14.5.6.2
[temp.func.order]
FWIW clang++ has exactly the same behaviour as G++
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
2012-07-05 10:10 ` [Bug c++/41958] [c++0x] bogus variadic partial ordering code redi at gcc dot gnu.org
@ 2012-11-18 13:41 ` paolo.carlini at oracle dot com
2012-11-18 22:29 ` zeratul976 at hotmail dot com
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-18 13:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zeratul976 at hotmail dot
| |com
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-18 13:41:32 UTC ---
*** Bug 55373 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
2012-07-05 10:10 ` [Bug c++/41958] [c++0x] bogus variadic partial ordering code redi at gcc dot gnu.org
2012-11-18 13:41 ` paolo.carlini at oracle dot com
@ 2012-11-18 22:29 ` zeratul976 at hotmail dot com
2012-11-19 0:21 ` paolo.carlini at oracle dot com
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: zeratul976 at hotmail dot com @ 2012-11-18 22:29 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
--- Comment #4 from Nathan Ridge <zeratul976 at hotmail dot com> 2012-11-18 22:28:59 UTC ---
I filed the same bug for clang, and I was pointed to DR1395 [1]. GCC and
clang's behaviour are both in line with the resolution of this DR.
I guess this can be closed as invalid then?
[1] http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#1395
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2012-11-18 22:29 ` zeratul976 at hotmail dot com
@ 2012-11-19 0:21 ` paolo.carlini at oracle dot com
2012-11-19 1:57 ` jason at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-19 0:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-19 00:21:29 UTC ---
Oh yes, nice. I'm only a bit nervous because the status is still drafting but
it looks like there is very solid agreement about the issue. Tomorrow I mean to
add the testcase to the testsuite and close the PR.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2012-11-19 0:21 ` paolo.carlini at oracle dot com
@ 2012-11-19 1:57 ` jason at gcc dot gnu.org
2012-11-19 2:12 ` paolo.carlini at oracle dot com
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jason at gcc dot gnu.org @ 2012-11-19 1:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> 2012-11-19 01:57:16 UTC ---
No. The resolution of 1395 will not make the testcase in #1 valid, only the
case where you have a degenerate overload, like
template<typename T, typename... Args>
int& f(const T&, Args...);
template<typename T>
int& f(const T&);
The testcase in #1 should still be rejected as ambiguous.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2012-11-19 1:57 ` jason at gcc dot gnu.org
@ 2012-11-19 2:12 ` paolo.carlini at oracle dot com
2012-11-19 3:50 ` zeratul976 at hotmail dot com
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-19 2:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-19 02:11:53 UTC ---
I see...
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2012-11-19 2:12 ` paolo.carlini at oracle dot com
@ 2012-11-19 3:50 ` zeratul976 at hotmail dot com
2012-11-19 13:42 ` jason at gcc dot gnu.org
2018-11-07 0:51 ` frankhb1989 at gmail dot com
8 siblings, 0 replies; 10+ messages in thread
From: zeratul976 at hotmail dot com @ 2012-11-19 3:50 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
--- Comment #8 from Nathan Ridge <zeratul976 at hotmail dot com> 2012-11-19 03:49:39 UTC ---
(In reply to comment #6)
> No. The resolution of 1395 will not make the testcase in #1 valid, only the
> case where you have a degenerate overload, like
>
> template<typename T, typename... Args>
> int& f(const T&, Args...);
>
> template<typename T>
> int& f(const T&);
>
> The testcase in #1 should still be rejected as ambiguous.
The note describing the resolution of 1395 says "preferring an omitted
parameter over a parameter pack".
The way I read that, in the testcase in comment 1, the second overload has an
"omitted parameter" ('d'), and the first overload has a "parameter pack", so
the secodn overload would be preferred.
Am I misreading it?
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2012-11-19 3:50 ` zeratul976 at hotmail dot com
@ 2012-11-19 13:42 ` jason at gcc dot gnu.org
2018-11-07 0:51 ` frankhb1989 at gmail dot com
8 siblings, 0 replies; 10+ messages in thread
From: jason at gcc dot gnu.org @ 2012-11-19 13:42 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> 2012-11-19 13:42:06 UTC ---
(In reply to comment #8)
> The note describing the resolution of 1395 says "preferring an omitted
> parameter over a parameter pack".
"omitted parameter" here means no parameter. The second overload has a
parameter, 'd'.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
` (7 preceding siblings ...)
2012-11-19 13:42 ` jason at gcc dot gnu.org
@ 2018-11-07 0:51 ` frankhb1989 at gmail dot com
8 siblings, 0 replies; 10+ messages in thread
From: frankhb1989 at gmail dot com @ 2018-11-07 0:51 UTC (permalink / raw)
To: gcc-bugs
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="UTF-8", Size: 1264121 bytes --]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
frankhb1989 at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |frankhb1989 at gmail dot com
--- Comment #10 from frankhb1989 at gmail dot com ---
The example from IS [temp.func.order]/5 (introduced by
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3281.pdf) still fails.
As per https://godbolt.org/z/6wq5Hx (from
https://www.zhihu.com/question/55055208/answer/142424499), 4.6.4 is OK, but
4.7.1 is nonconforming.
Not sure which change cause the behavior divergence; please confirm.
(BTW, the original issue asked in the post is about PR 33807. It seems
innocent. MSVC 15.8.2 does not have the operator== for allocator<T>; not sure
it is correct, but MSVC does reject the example in this issue correctly.
Nevertheless, I wonder the status of LWG 2472 and whether the resolution of LWG
280 have some related effects.)
>From gcc-bugs-return-620406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 02:15:01 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87793] [8/9 Regression] GCC reports error when compiling with "-fpic -Os -g"
Date: Wed, 07 Nov 2018 02:15:00 -0000
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |aoliva at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |aoliva at gcc dot gnu.org
--- Comment #2 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Mine
>From gcc-bugs-return-620407-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 02:29:19 2018
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From: "hoganmeier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87913] New: max(n, 1) code generation
Date: Wed, 07 Nov 2018 02:29:00 -0000
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Bug ID: 87913
Summary: max(n, 1) code generation
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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unsigned int f(unsigned int num)
{
return num < 1 ? 1 : num;
}
int f2(int num)
{
return num < 1 ? 1 : num;
}
unsigned int g(unsigned int num)
{
return num + !num;
}
$ gcc -O3
f(unsigned int):
mov eax, edi
test edi, edi
mov edx, 1
cmove eax, edx
f2(int):
test edi, edi
mov eax, 1
cmovg eax, edi
g(unsigned int):
xor eax, eax
test edi, edi
sete al
add eax, edi
f and g could be:
f: test edi, edi
mov eax, 1
cmovne eax, edi
g: cmp edi, 1
adc edi, 0
mov eax, edi
https://godbolt.org/z/YJWjsQ
>From gcc-bugs-return-620408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 02:34:50 2018
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From: "shentino at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/87905] structures in two different cpp source files with same name get flagged by ODR warning
Date: Wed, 07 Nov 2018 02:34:00 -0000
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--- Comment #4 from Raymond Jennings <shentino at gmail dot com> ---
(In reply to Martin Liška from comment #2)
> >
> > Note in the test package that neither struct is exposed to the other
> > translation unit.
>
> But it's violation of C++ ODR and as LTO compilation unit is entire program,
> you then introduce violation.
I respectfully disagree.
Unless the source code itself changes, toggling LTO shouldn't affect generated
warnings.
It may be one /compilation/ unit, but by the standard they still count as
separate translation units. LTO is an artifact of the compiler and not the
standard so it shouldn't have an impact on ODR warnings.
>From gcc-bugs-return-620409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 04:17:06 2018
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From: "hoganmeier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87914] New: gcc fails to vectorize bitreverse code
Date: Wed, 07 Nov 2018 04:17:00 -0000
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Bug ID: 87914
Summary: gcc fails to vectorize bitreverse code
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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$ gcc -fopenmp-simd -O3 -march=haswell -fopt-info-vec-omp-optimized-missed
template <typename T>
T reverseBits(T x)
{
unsigned int s = sizeof(x) * 8;
T mask = ~T(0);
while ((s >>= 1) > 0)
{
mask ^= (mask << s);
x = ((x >> s) & mask) | ((x << s) & ~mask); // unsupported use
in stmt
}
return x;
}
void test_reverseBits(unsigned* x)
{
#pragma omp simd aligned(x:32)
for (int i = 0; i < 16; ++i)
x[i] = reverseBits(x[i]); // couldn't vectorize loop
}
clang and icc vectorize this:
https://godbolt.org/z/ROJZGZ
>From gcc-bugs-return-620410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 05:01:36 2018
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From: "hoganmeier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87915] New: emit warning if (explicit) vectorization failed
Date: Wed, 07 Nov 2018 05:01:00 -0000
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Bug ID: 87915
Summary: emit warning if (explicit) vectorization failed
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Priority: P3
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When using #pragma omp simd for explicit vectorization shouldn't it warn if
vectorization failed?
clang has -Wpass-failed for that:
http://lists.llvm.org/pipermail/cfe-dev/2015-July/044226.html
>From gcc-bugs-return-620411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 05:59:19 2018
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From: "fdumont at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87872] debug list::splice should not call _M_transfer_from_if on self-splices
Date: Wed, 07 Nov 2018 05:59:00 -0000
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François Dumont <fdumont at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |9.0
--- Comment #5 from François Dumont <fdumont at gcc dot gnu.org> ---
Patch committed, thanks again.
>From gcc-bugs-return-620412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 06:23:39 2018
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Subject: [Bug target/87793] [8/9 Regression] GCC reports error when compiling with "-fpic -Os -g"
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--- Comment #3 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Created attachment 44966
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44966&action=edit
candidate patch
>From gcc-bugs-return-620413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 06:26:10 2018
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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87874] [8/9 Regression] ICE in simplify_subreg, at simplify-rtx.c:6396
Date: Wed, 07 Nov 2018 06:26:00 -0000
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--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Wed Nov 7 06:25:30 2018
New Revision: 265860
URL: https://gcc.gnu.org/viewcvs?rev=265860&root=gcc&view=rev
Log:
[PR87874] avoid const-wide-int subreg in LRA
Just like CONST_INT, CONST_WIDE_INT is VOIDmode, so LRA might be
tempted to build a SUBREG to "convert" it to the wanted mode. That's
no use. Test for CONST_SCALAR_INT_P instead of CONST_INT_P so that we
skip the subreg creation for both.
for gcc/ChangeLog
PR rtl-optimization/87874
* lra.c (lra_substitute_pseudo): Do not create a subreg for
const wide ints.
for gcc/testsuite/ChangeLog
PR rtl-optimization/87874
* gcc.dg/pr87874.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/pr87874.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lra.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-620414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 07:43:20 2018
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Subject: [Bug lto/87905] structures in two different cpp source files with same name get flagged by ODR warning
Date: Wed, 07 Nov 2018 07:43:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Raymond Jennings from comment #4)
> (In reply to Martin Liška from comment #2)
> > >
> > > Note in the test package that neither struct is exposed to the other
> > > translation unit.
> >
> > But it's violation of C++ ODR and as LTO compilation unit is entire program,
> > you then introduce violation.
>
> I respectfully disagree.
>
> Unless the source code itself changes, toggling LTO shouldn't affect
> generated warnings.
That's not true. Your source code snippet is violating ODR even without LTO,
but compiler can't prove that.
>
> It may be one /compilation/ unit, but by the standard they still count as
> separate translation units. LTO is an artifact of the compiler and not the
> standard so it shouldn't have an impact on ODR warnings.
Please take a look at:
https://en.wikipedia.org/wiki/One_Definition_Rule
more particularly at 'Example showing unexpected side effects' where you can
see example where even non-LTO mode produces undefined behavior based on the
violation.
In general, we as compiler developers, are under pressure due to user's
expectation about highly optimized binaries. On the other hand, we need to base
these optimizations on standards that we can leverage.
>From gcc-bugs-return-620415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 07:48:56 2018
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Subject: [Bug target/87793] [8/9 Regression] GCC reports error when compiling with "-fpic -Os -g"
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--- Comment #4 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00411.html
>From gcc-bugs-return-620416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 07:58:56 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/87916] New: [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
Date: Wed, 07 Nov 2018 07:58:00 -0000
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Bug ID: 87916
Summary: [9 Regression] ICE in dwarf2out_abstract_function, at
dwarf2out.c:22479 since r264943
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Following causes ICE:
$ cat turbo.ii
struct a {
virtual ~a();
};
template <typename b> class c {
public:
class d {
public:
d(c);
b *operator->();
};
};
int e, f;
class g {
public:
class h {
public:
virtual void j(g &, int &, bool) = 0;
};
c<h> k();
int *l();
int *m();
};
int *g::l() try {
for (c<h>::d i(k());;)
i->j(*this, e, true);
} catch (int) {
return 0;
}
int *g::m() try {
for (c<h>::d i(k());;)
i->j(*this, f, false);
} catch (int) {
return 0;
}
struct n : a, g::h {
void o();
void j(g &, int &, bool) { o(); }
};
$ g++ -O2 -g turbo.ii -c -m32 -fPIC -Wall
during IPA pass: inline
turbo.ii: In member function ‘int* g::l()’:
turbo.ii:25:9: internal compiler error: in dwarf2out_abstract_function, at
dwarf2out.c:22479
25 | i->j(*this, e, true);
| ~~~~^~~~~~~~~~~~~~~~
0x731731 dwarf2out_abstract_function
/home/marxin/Programming/gcc/gcc/dwarf2out.c:22479
0x31fa65f expand_call_inline
/home/marxin/Programming/gcc/gcc/tree-inline.c:4855
0x3202412 gimple_expand_calls_inline
/home/marxin/Programming/gcc/gcc/tree-inline.c:4886
0x3202412 optimize_inline_calls(tree_node*)
/home/marxin/Programming/gcc/gcc/tree-inline.c:5026
0x57cbd67 inline_transform(cgraph_node*)
/home/marxin/Programming/gcc/gcc/ipa-inline-transform.c:682
0x29de91a execute_one_ipa_transform_pass
/home/marxin/Programming/gcc/gcc/passes.c:2190
0x29de91a execute_all_ipa_transforms()
/home/marxin/Programming/gcc/gcc/passes.c:2229
0x196c0f5 cgraph_node::expand()
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2187
0x1972724 expand_all_functions
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2332
0x1972724 symbol_table::compile()
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2683
0x197dc3a symbol_table::finalize_compilation_unit()
/home/marxin/Programming/gcc/gcc/cgraphunit.c:2861
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-620417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 07:59:25 2018
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Subject: [Bug debug/87916] [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
Date: Wed, 07 Nov 2018 07:59:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-11-7
Known to work| |8.2.0
Target Milestone|--- |9.0
Known to fail| |9.0
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Subject: [Bug tree-optimization/87901] partial DSE of memset doesn't work for other kind of stores
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87901
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> The example is undefined -- it forms a past the-end pointer -- and
> -Warray-bounds detects it:
>
> warning: array subscript 2 is outside array bounds of ‘int[1]’
> [-Warray-bounds]
> 6 | *((short *)&i + sizeof (int) - sizeof (short)) = 1;
>
> I don't suppose you meant to do that, but presumably meant to access a part
> of the object. But even then the code is undefined.
>
> Can you explain/clarify what you have in mind and why it's important?
Whoops - should be + 2 - 1 (was char * before I made it to shorts).
int i;
void foo ()
{
i = 0;
*((short *)&i + 1) = 1;
}
the original motivation is from 36602 patch regressions. When transforming
char z[32];
int
foo(void)
{
memset (z, 0, 16);
memset (z+8, 0, 24);
}
to
int
foo(void)
{
MEM[&z] = 0;
MEM[&z+8] = {};
}
DSE doesn't know to adjust the = 0 store (and likely not a = {} store if it
were first).
I first wanted to construct an example with unions...
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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/87917] New: ICE in initialize_matrix_A at gcc/tree-data-ref.c:3150
Date: Wed, 07 Nov 2018 08:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87917
Bug ID: 87917
Summary: ICE in initialize_matrix_A at gcc/tree-data-ref.c:3150
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Following causes ICE:
$ arm-linux-gnueabi-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr34635.c
-ftree-loop-distribute-patterns -ftrapv -fno-tree-fre -O2
during GIMPLE pass: ldist
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr34635.c: In
function ‘foo’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr34635.c:4:6:
internal compiler error: in int_cst_value, at tree.c:11385
4 | void foo(int x[])
| ^~~
0x59cad1 int_cst_value(tree_node const*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree.c:11385
0x112cddc initialize_matrix_A
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:3150
0x112fcd2 initialize_matrix_A
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:3143
0x112fcd2 analyze_subscript_affine_affine
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:3568
0x113632b analyze_miv_subscript
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:4014
0x113632b analyze_overlapping_iterations
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:4120
0x113632b subscript_dependence_tester_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:4656
0x1136ac7 subscript_dependence_tester_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:4652
0x1136ac7 subscript_dependence_tester
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:4706
0x1136ac7 compute_affine_dependence(data_dependence_relation*, loop*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-data-ref.c:4765
0xab3f61 get_data_dependence
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-loop-distribution.c:1188
0xab4195 data_dep_in_cycle_p
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-loop-distribution.c:1210
0xab4195 update_type_for_merge
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-loop-distribution.c:1255
0xab5b97 build_rdg_partition_for_vertex
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-loop-distribution.c:1302
0xab5b97 rdg_build_partitions
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-loop-distribution.c:1754
0xab5b97 distribute_loop
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-loop-distribution.c:2795
0xab88a0 execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-arm/build/gcc/tree-loop-distribution.c:3133
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Subject: [Bug lto/87906] [9 Regression] ICE in tree check: expected block, have function_decl in block_ultimate_origin, at tree.c:12326 since r264734
Date: Wed, 07 Nov 2018 08:07:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 7 08:06:57 2018
New Revision: 265861
URL: https://gcc.gnu.org/viewcvs?rev=265861&root=gcc&view=rev
Log:
2018-11-07 Richard Biener <rguenther@suse.de>
PR lto/87906
* tree-streamer-in.c (lto_input_ts_block_tree_pointers): Fixup
BLOCK_ABSTRACT_ORIGIN to be the ultimate origin.
* g++.dg/lto/pr87906_0.C: New testcase.
* g++.dg/lto/pr87906_1.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/lto/pr87906_0.C
trunk/gcc/testsuite/g++.dg/lto/pr87906_1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-streamer-in.c
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Subject: [Bug sanitizer/87840] LSAN not always printing the leaks when -fsanitizedress is absent
Date: Wed, 07 Nov 2018 08:18:00 -0000
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chefmax at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |chefmax at gcc dot gnu.org
--- Comment #10 from chefmax at gcc dot gnu.org ---
(In reply to Jan Engelhardt from comment #0)
> $ cat x.cpp
> #include <memory>
> struct S {
> std::shared_ptr<S> other;
> };
> int main()
> {
> auto e = std::make_shared<S>();
> e->other = e;
> }
>
> $ g++-9 x.cpp -ggdb3 -llsan -fsanitize=leak
> $ ./a.out
> $
>
> LSAN fails to report the cycle while valgrind does.
>
> Using built-in specs.
> COLLECT_GCC=g++-9
> COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/9/lto-wrapper
> OFFLOAD_TARGET_NAMES=hsa:nvptx-none
> Target: x86_64-suse-linux
> Configured 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
> --enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none,
> --without-cuda-driver --enable-checking=release --disable-werror
> --with-gxx-include-dir=/usr/include/c++/9 --enable-ssp --disable-libssp
> --disable-libvtv --disable-cet --disable-libcc1 --enable-plugin
> --with-bugurl=http://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
> --without-system-libunwind --enable-multilib --with-arch-32=x86-64
> --with-tune=generic --build=x86_64-suse-linux --host=x86_64-suse-linux
> Thread model: posix
> gcc version 9.0.0 20181026 (experimental) [trunk revision 265522] (SUSE
> Linux)
> Applies to
> gcc version 8.2.1 20180831 [gcc-8-branch revision 264010] (SUSE Linux)
> gcc version 7.3.1 20180817 [gcc-7-branch revision 263612] (SUSE Linux)
> as well.
I can confirm this with master GCC:
$ ~/install/master/bin/g++ x.cpp -ggdb3 -fsanitize=leak -static-liblsan ;
LSAN_OPTIONS=log_pointers=1:log_threads=1 ./a.out
==9273==Scanning GLOBAL range 0x000000651000-0x000000654fe0.
==9273==Scanning GLOBAL range 0x0000006552a8-0x000000ee86e8.
==9273==Scanning GLOBAL range 0x7fa92c405308-0x7fa92c4140a0.
==9273==0x7fa92c410ca8: found 0x631000000000 pointing into chunk
0x631000000000-0x631000011c00 of size 72704.
==9273==Scanning GLOBAL range 0x7fa92c090d70-0x7fa92c0910f8.
==9273==Scanning GLOBAL range 0x7fa92bd87d60-0x7fa92bd880f0.
==9273==Scanning GLOBAL range 0x7fa92bb83d58-0x7fa92bb84bc0.
==9273==Scanning GLOBAL range 0x7fa92b977b78-0x7fa92b97c428.
==9273==Scanning GLOBAL range 0x7fa92b75edc8-0x7fa92b75f450.
==9273==Scanning GLOBAL range 0x7fa92b53f7c0-0x7fa92b5489a0.
==9273==Scanning GLOBAL range 0x7fa92c63abc0-0x7fa92c63c168.
==9273==Processing thread 9272.
==9273==Scanning REGISTERS range 0x7fa92c5ff000-0x7fa92c5ff0d8.
==9273==Stack at 0x7ffe51e77000-0x7ffe52677000 (SP = 0x7ffe52674a28).
==9273==Scanning STACK range 0x7ffe52674a28-0x7ffe52677000.
==9273==0x7ffe52674bf8: found 0x602000000008 pointing into chunk
0x602000000000-0x602000000020 of size 32.
==9273==TLS at 0x7fa92c5e2000-0x7fa92c5f0c00.
==9273==Scanning TLS range 0x7fa92c5e2000-0x7fa92c5e2758.
==9273==Scanning TLS range 0x7fa92c5f02d8-0x7fa92c5f0c00.
==9273==Scanning HEAP range 0x602000000000-0x602000000020.
==9273==Scanning HEAP range 0x631000000000-0x631000011c00.
==9273==Processing platform-specific allocations.
==9273==Scanning leaked chunks
>From the log I can see that pointer to allocated chunk still reachable from
main thread stack.
I'm not sure why this doesn't happen with ASan enabled, perhaps it performs
some stack cleanup before exit and rewrites this pointer.
Anyways, I don't see any opportunity to fix this in LSan in its current usage
model.
FWIW upstream has several similar reports, see e.g.
https://github.com/google/sanitizers/issues/937
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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/36602] memset should be optimized into an empty CONSTRUCTOR
Date: Wed, 07 Nov 2018 08:18:00 -0000
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #11)
> Created attachment 44963 [details]
> updated patch
>
> Updated patch. There are the expected missing warnings plus the two missed
> optimizations noted by the bugs this now depends on.
Current fallout is
FAIL: g++.dg/pr79095-2.C -std=gnu++14 (test for warnings, line )
FAIL: g++.dg/pr79095-2.C -std=gnu++17 (test for warnings, line )
FAIL: g++.dg/pr79095-2.C -std=gnu++98 (test for warnings, line )
FAIL: gcc.dg/builtin-object-size-4.c execution test
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 72)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 75)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 78)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 81)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 84)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 87)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 92)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 95)
FAIL: gcc.dg/builtin-stringop-chk-5.c (test for warnings, line 98)
FAIL: gcc.dg/tm/memset.c scan-assembler _ITM_memsetW
FAIL: gcc.dg/tree-ssa/calloc-3.c scan-tree-dump-not optimized "malloc"
FAIL: gcc.dg/tree-ssa/calloc-3.c scan-tree-dump-times optimized "calloc" 1
-> PR87900
FAIL: gcc.dg/tree-ssa/ssa-dse-25.c scan-tree-dump dse1 "memset .&z, 0, 8."
-> PR87901
and additionally with -m32
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 101)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 110)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 111)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 117)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 118)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 119)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 153)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 154)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 155)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 156)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 157)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 158)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 46)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 71)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 72)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 73)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 74)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 75)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 76)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 92)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 96)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for warnings, line 99)
FAIL: gcc.dg/warn-strlen-no-nul.c (internal compiler error)
FAIL: gcc.dg/warn-strlen-no-nul.c (test for excess errors)
(the ICE looks latent, and thus may be the reason for the missed warnings)
FAIL: gcc.dg/tree-ssa/builtin-sprintf-10.c (test for excess errors)
Some of the missed warnings might be cured with careful placement of
check_bounds_or_overlap calls in memset folding like we do for
memcpy folding. But that's not exactly my area of expertise/interest.
I will test a slightly less aggresive patch now.
>From gcc-bugs-return-620423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 08:23:53 2018
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Subject: [Bug middle-end/87869] Unrolled loop leads to excessive code bloat with -Os on ARC EM.
Date: Wed, 07 Nov 2018 08:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amylaar at gcc dot gnu.org,
| |andrew.burgess at embecosm dot com
| |, claziss at gcc dot gnu.org
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
CCing (former) ARC port maintainers.
>From gcc-bugs-return-620424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 08:25:37 2018
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Subject: [Bug lto/87906] [9 Regression] ICE in tree check: expected block, have function_decl in block_ultimate_origin, at tree.c:12326 since r264734
Date: Wed, 07 Nov 2018 08:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-620425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 08:33:54 2018
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Subject: [Bug target/87913] max(n, 1) code generation
Date: Wed, 07 Nov 2018 08:33:00 -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| |2018-11-07
Component|tree-optimization |target
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. For f we fail to detect the max() operation at the tree level
because the test is using != 0 instead of < 1.
f (unsigned int num)
{
unsigned int iftmp.0_1;
<bb 2> [local count: 1073741825]:
if (num_2(D) != 0)
goto <bb 4>; [50.00%]
else
goto <bb 3>; [50.00%]
<bb 3> [local count: 536870913]:
<bb 4> [local count: 1073741825]:
# iftmp.0_1 = PHI <num_2(D)(2), 1(3)>
return iftmp.0_1;
g is represented as
g (unsigned int num)
{
_Bool _1;
unsigned int _2;
unsigned int _4;
<bb 2> [local count: 1073741825]:
_1 = num_3(D) == 0;
_2 = (unsigned int) _1;
_4 = _2 + num_3(D);
return _4;
expanded to (after combine)
(insn 6 3 7 2 (set (reg:CCZ 17 flags)
(compare:CCZ (reg/v:SI 85 [ num ])
(const_int 0 [0]))) "/tmp/t.c":13:16 7 {*cmpsi_ccno_1}
(nil))
(insn 8 7 9 2 (set (reg:SI 87)
(eq:SI (reg:CCZ 17 flags)
(const_int 0 [0]))) "/tmp/t.c":13:16 652 {*setcc_si_1_movzbl}
(insn 9 8 14 2 (parallel [
(set (reg:SI 86)
(plus:SI (reg:SI 87)
(reg/v:SI 85 [ num ])))
(clobber (reg:CC 17 flags))
]) "/tmp/t.c":13:14 190 {*addsi_1}
that's a target missed optimization. I'll fix the MIN/MAX detection
and thus make this issue a target one.
>From gcc-bugs-return-620426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 08:36:58 2018
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Subject: [Bug tree-optimization/87915] emit warning if (explicit) vectorization failed
Date: Wed, 07 Nov 2018 08:36:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, openmp
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-07
CC| |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
You could use -fopt-info-vec-missed but that warns about more cases than just
#pragma omp simd ones.
Thus confirmed.
I don't think we want to add -Wpass-failed but -Wopenmp might warn about
"unhandled" (unoptimized) OMP constructs?
>From gcc-bugs-return-620427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 08:46:11 2018
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Subject: [Bug tree-optimization/87914] gcc fails to vectorize bitreverse code
Date: Wed, 07 Nov 2018 08:46:00 -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| |2018-11-07
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. You are expecting the outer loop to be vectorized but outer loop
vectorization fails due to
t.C:18:27: note: Analyze phi: x_24 = PHI <_4(3), x_23(8)>
t.C:18:27: missed: reduction value used in loop.
t.C:18:27: missed: Unknown def-use cycle pattern.
t.C:18:27: note: Analyze phi: mask_26 = PHI <4294967295(3), mask_17(8)>
t.C:18:27: missed: reduction value used in loop.
t.C:18:27: missed: Unknown def-use cycle pattern.
t.C:18:27: note: Analyze phi: s_7 = PHI <16(3), s_14(8)>
t.C:18:27: missed: reduction value used in loop.
t.C:18:27: missed: Unknown def-use cycle pattern.
but for the inner loop those are just internal defs so I'm not sure why
the vectorizer backs off here... (at least mask and s should be simple
vect_nested_cycle, IMHO x as well)
>From gcc-bugs-return-620428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 09:08:44 2018
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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/87918] New: [9 Regression] ICE in simplify_binary_operation, at simplify-rtx.c:2153 since r264688
Date: Wed, 07 Nov 2018 09:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87918
Bug ID: 87918
Summary: [9 Regression] ICE in simplify_binary_operation, at
simplify-rtx.c:2153 since r264688
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Following is causing an ICE:
$ cat loops.i
typedef float a __attribute__((__vector_size__(16)));
a b, c, d;
void e() {
float f;
c = (__attribute__((__vector_size__(4 * sizeof(float)))) float){f};
d = __builtin_ia32_cmpless(c, b);
}
$ gcc loops.i -c -O2
during RTL pass: fwprop1
loops.i: In function ‘e’:
loops.i:8:1: internal compiler error: in simplify_binary_operation, at
simplify-rtx.c:2153
8 | }
| ^
0x772e68 simplify_binary_operation(rtx_code, machine_mode, rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:2153
0x26502d1 simplify_gen_binary(rtx_code, machine_mode, rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:194
0x26828f2 simplify_merge_mask(rtx_def*, rtx_def*, int)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:5650
0x26571c1 simplify_ternary_operation(rtx_code, machine_mode, machine_mode,
rtx_def*, rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:6066
0x265b68e simplify_gen_ternary(rtx_code, machine_mode, machine_mode, rtx_def*,
rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:387
0x2657211 simplify_ternary_operation(rtx_code, machine_mode, machine_mode,
rtx_def*, rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:5928
0x265b68e simplify_gen_ternary(rtx_code, machine_mode, machine_mode, rtx_def*,
rtx_def*, rtx_def*)
/home/marxin/Programming/gcc/gcc/simplify-rtx.c:387
0x4c73d30 propagate_rtx_1
/home/marxin/Programming/gcc/gcc/fwprop.c:536
0x4c767d6 propagate_rtx
/home/marxin/Programming/gcc/gcc/fwprop.c:692
0x4c781a2 forward_propagate_and_simplify
/home/marxin/Programming/gcc/gcc/fwprop.c:1361
0x4c781a2 forward_propagate_into
/home/marxin/Programming/gcc/gcc/fwprop.c:1420
0x4c7bff7 fwprop
/home/marxin/Programming/gcc/gcc/fwprop.c:1509
0x4c7bff7 execute
/home/marxin/Programming/gcc/gcc/fwprop.c:1540
>From gcc-bugs-return-620429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 09:09:16 2018
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Subject: [Bug rtl-optimization/87918] [9 Regression] ICE in simplify_binary_operation, at simplify-rtx.c:2153 since r264688
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-11-7
CC| |ams at gcc dot gnu.org,
| |hubicka at gcc dot gnu.org,
| |jamborm at gcc dot gnu.org
Known to work| |8.2.0
Target Milestone|--- |9.0
Known to fail| |9.0
>From gcc-bugs-return-620430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 09:22:49 2018
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Subject: [Bug tree-optimization/87915] emit warning if (explicit) vectorization failed
Date: Wed, 07 Nov 2018 09:22:00 -0000
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--- Comment #2 from krux <hoganmeier at gmail dot com> ---
Yeah I'm using -fopt-info for manual performance analysis but that can't be
enabled in the normal build as it's too noisy.
Furthermore a proper warning can be turned into an error to ensure that
developer expectations are met by the compiler.
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Subject: [Bug rtl-optimization/87868] testsuite/c-c++-common/pr60101.c with -O3 and ubsan
Date: Wed, 07 Nov 2018 09:33:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Nov 7 09:33:22 2018
New Revision: 265869
URL: https://gcc.gnu.org/viewcvs?rev=265869&root=gcc&view=rev
Log:
Fix UBSAN in postreload-gcse.c (PR rtl-optimization/87868).
2018-11-07 Martin Liska <mliska@suse.cz>
PR rtl-optimization/87868
* postreload-gcse.c (eliminate_partially_redundant_load): Set
threshold to max_count if we would overflow.
* profile-count.h: Make max_count a public constant.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/postreload-gcse.c
trunk/gcc/profile-count.h
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Subject: [Bug rtl-optimization/87868] testsuite/c-c++-common/pr60101.c with -O3 and ubsan
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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.
>From gcc-bugs-return-620433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 09:40:42 2018
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87919] New: Incorrect fortran handling of -fno-* options
Date: Wed, 07 Nov 2018 09:40:00 -0000
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Bug ID: 87919
Summary: Incorrect fortran handling of -fno-* options
Product: gcc
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Seems gfc_handle_options doesn't handle properly some -fno-* options.
Mark Eggleston has a fix for -fno-dec-structure (that acts the same as
-fdec-structure), but -fno-check-array-temporaries, -fno-init-local-zero and
-fno-dec behave similarly, they ignore the no- part completely.
In
case OPT_fcheck_array_temporaries:
gfc_option.rtcheck |= GFC_RTCHECK_ARRAY_TEMPS;
break;
I guess it should be:
if (value)
gfc_option.rtcheck |= GFC_RTCHECK_ARRAY_TEMPS;
else
gfc_option.rtcheck &= ~GFC_RTCHECK_ARRAY_TEMPS;
for -fno-initi-local-zero for !value I'd say it should set all the knobs to
*_OFF, and -fno-dec, the question is if set_dec_flags (0) actually shouldn't
also undo what set_dec_flags (1) does; then it should do the &= ~ for !value
rather than the useless |= value; which does nothing if value is 0.
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Subject: [Bug sanitizer/87454] Maybe implement -fsanitize=implicit-integer-truncation
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-11-07
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Note that truncation is only part of recently added Implicit Conversion
Sanitizer:
http://releases.llvm.org/7.0.0/tools/clang/docs/ReleaseNotes.html#undefined-behavior-sanitizer-ubsan
One can find a blog post about it here (mentioned in LLVM weekly):
John Regehr has a short blog post on [recently added implicit integer cast
sanitizers](https://blog.regehr.org/archives/1633).
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Subject: [Bug target/87913] max(n, 1) code generation
Date: Wed, 07 Nov 2018 09:46:00 -0000
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--- Comment #2 from krux <hoganmeier at gmail dot com> ---
The case of function g is quite interesting because of the data dependencies
and adc's latency:
https://godbolt.org/z/0V8Dlx
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Subject: [Bug c/66298] -Wmisleading-indentation should also detect missing indentation
Date: Wed, 07 Nov 2018 09:46:00 -0000
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--- Comment #3 from Florian Weimer <fw at gcc dot gnu.org> ---
This would also help to detect the incorrect pragma placement in bug 63326:
int main()
{
int result = 1;
if (result < 0)
#pragma GCC diagnostic ignored "-Wunused-result"
return result;
return 0;
}
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Subject: [Bug tree-optimization/87914] gcc fails to vectorize bitreverse code
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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> ---
Note that if that is fixed we still fail vectorization with
t.C:8:21: missed: not vectorized: relevant stmt not supported: _16 = mask_26
<< s_7;
t.C:18:27: missed: bad operation or unsupported loop bound.
I have a fix for that. But in the end the issue is weak handling of vectorized
nested cycles in general.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
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Jüri Valdmann <juri.valdmann at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |juri.valdmann at gmail dot com
--- Comment #4 from Jüri Valdmann <juri.valdmann at gmail dot com> ---
(In reply to Markus Trippelsdorf from comment #3)
> So, I see no reason at all to support -fuse-ld=lld.
I can think of one reason: users want to use it.
>From gcc-bugs-return-620439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 11:06:06 2018
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Subject: [Bug c/79775] Confusing fix-it diagnostics with double pointers to structs
Date: Wed, 07 Nov 2018 11:06:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Last reconfirmed|2017-03-01 00:00:00 |2018-11-7
CC| |dmalcolm at gcc dot gnu.org,
| |tschwinge at gcc dot gnu.org
--- Comment #2 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
I ran into such a thing, too (with today's GCC trunk r265867):
struct s
{
int m;
};
void f(struct s **s)
{
*s->m = 5;
// (*s)->m = 5;
}
C:
../f.c: In function 'f':
../f.c:8:5: error: '*s' is a pointer; did you mean to use '->'?
8 | *s->m = 5;
| ^~
| ->
C++:
../f.c: In function 'void f(s**)':
../f.c:8:7: error: request for member 'm' in '* s', which is of pointer
type 's*' (maybe you meant to use '->' ?)
8 | *s->m = 5;
| ^
>From gcc-bugs-return-620440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 12:59:35 2018
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87920] New: Lots of regression tests fail with bootstrap build of arm-linux-gnueabihf
Date: Wed, 07 Nov 2018 12:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87920
Bug ID: 87920
Summary: Lots of regression tests fail with bootstrap build of
arm-linux-gnueabihf
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Hi,
It seems lots of tests are failing with bootstrap build of arm-linux-gnueabihf
with following ICE:
during GIMPLE pass: ldist
/home/prathamesh.kulkarni/gnu-toolchain/gcc/tcwg-319-4/gcc/gcc/testsuite/c-c++-common/torture/pr53505.c:
In function 'main':
/home/prathamesh.kulkarni/gnu-toolchain/gcc/tcwg-319-4/gcc/gcc/testsuite/c-c++-common/torture/pr53505.c:29:1:
internal compiler error: Segmentation fault
0x5e83cb crash_signal
../../gcc/gcc/toplev.c:325
0x660e57 inchash::hash::add(void const*, unsigned int)
../../gcc/gcc/inchash.h:100
0x660e57 inchash::hash::add_ptr(void const*)
../../gcc/gcc/inchash.h:94
0x660e57 ddr_hasher::hash(data_dependence_relation const*)
../../gcc/gcc/tree-loop-distribution.c:143
0x660e57 hash_table<ddr_hasher,
xcallocator>::find_slot(data_dependence_relation* const&, insert_option)
../../gcc/gcc/hash-table.h:414
0x660e57 get_data_dependence
../../gcc/gcc/tree-loop-distribution.c:1184
0x66157b pg_add_dependence_edges
../../gcc/gcc/tree-loop-distribution.c:1890
0x66157b build_partition_graph
../../gcc/gcc/tree-loop-distribution.c:2107
0x66180f merge_dep_scc_partitions
../../gcc/gcc/tree-loop-distribution.c:2171
0x662e69 distribute_loop
../../gcc/gcc/tree-loop-distribution.c:2892
0x66416d execute
../../gcc/gcc/tree-loop-distribution.c:3133
Several tests fail with above ICE, like pr53505.c,
20131115-1.c, 20181024-1.c etc.
Thanks,
Prathamesh
>From gcc-bugs-return-620441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 13:01:48 2018
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Subject: [Bug target/87920] Lots of regression tests fail with bootstrap build of arm-linux-gnueabihf
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Is this a duplicate of https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87899 ?
>From gcc-bugs-return-620443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 13:03:51 2018
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Subject: [Bug target/87920] Lots of regression tests fail with bootstrap build of arm-linux-gnueabihf
Date: Wed, 07 Nov 2018 13:03:00 -0000
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prathamesh3492 at gcc dot gnu.org changed:
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--- Comment #2 from prathamesh3492 at gcc dot gnu.org ---
Likely yes, thanks for the pointer! I will mark this as dup.
Thanks,
Prathamesh
*** This bug has been marked as a duplicate of bug 87899 ***
>From gcc-bugs-return-620442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 13:03:47 2018
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Subject: [Bug middle-end/87899] [9 regression]r264897 cause mis-compiled native arm-linux-gnueabihf toolchain
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prathamesh3492 at gcc dot gnu.org changed:
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CC| |prathamesh3492 at gcc dot gnu.org
--- Comment #4 from prathamesh3492 at gcc dot gnu.org ---
*** Bug 87920 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-620444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 14:18:15 2018
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Subject: [Bug debug/87916] [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
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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> ---
I can reproduce.
>From gcc-bugs-return-620445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 14:21:25 2018
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Subject: [Bug debug/87916] [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
>From gcc-bugs-return-620446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 14:31:53 2018
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Subject: [Bug middle-end/87916] [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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Component|debug |middle-end
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Recategorizing.
>From gcc-bugs-return-620447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 14:38:10 2018
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From: "gary_mills at fastmail dot fm" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/87836] ICE in cc1 for gcc-6.5.0 with SPARC hardware
Date: Wed, 07 Nov 2018 14:38:00 -0000
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--- Comment #6 from Gary Mills <gary_mills at fastmail dot fm> ---
I'm still waiting for information on how to use gdb to check the alignment of
the structures involved in this ICE.
>From gcc-bugs-return-620448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 15:01:26 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87914] gcc fails to vectorize bitreverse code
Date: Wed, 07 Nov 2018 15:01:00 -0000
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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> ---
Fixed on trunk.
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
Date: Wed, 07 Nov 2018 15:01:00 -0000
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Bug 53947 depends on bug 87914, which changed state.
Bug 87914 Summary: gcc fails to vectorize bitreverse code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87914
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Subject: [Bug tree-optimization/87914] gcc fails to vectorize bitreverse code
Date: Wed, 07 Nov 2018 15:01:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 7 15:01:09 2018
New Revision: 265876
URL: https://gcc.gnu.org/viewcvs?rev=265876&root=gcc&view=rev
Log:
2018-11-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/87914
* tree-vect-loop.c (vect_is_simple_reduction): Improve detection
of nested cycles.
(vectorizable_reduction): Handle shifts and rotates by dispatching
to vectorizable_shift.
* tree-vect-stmts.c (vect_get_vec_def_for_operand_1): Handle
in-loop uses of vect_nested_cycle defs. Merge cycle and internal
def cases.
(vectorizable_shift): Export and handle being called as
vect_nested_cycle.
(vect_analyze_stmt): Call vectorizable_shift after
vectorizable_reduction.
* tree-vectorizer.h (vectorizable_shift): Declare.
* lib/target-supports.exp (check_effective_target_vect_var_shift): New.
(check_avx2_available): Likewise.
* g++.dg/vect/pr87914.cc: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/vect/pr87914.cc
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/lib/target-supports.exp
trunk/gcc/tree-vect-loop.c
trunk/gcc/tree-vect-stmts.c
trunk/gcc/tree-vectorizer.h
>From gcc-bugs-return-620451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 15:21:23 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug gcov-profile/87442] Add options to filter files we want to instrument for code coverage
Date: Wed, 07 Nov 2018 15:21:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Ok, I've got a patch prototype and I hope I'll be able to sent it before
the end of this stage1.
> The idea is to add two options to easily include/exclude some files from
> being instrumented.
> Here are two use cases:
> 1) -coverage-exclude=/usr/include/*: typically we remove the data for such
> files when post-processing the gcno/gcda so we don't need to instrument them
> and so we could reduce the overhead due to instrumentation.
> 2) -coverage-filter=.*/foo.cpp:.*/bar.cpp: here we want to only instrument
> these two files (for example, to display code coverage data for files
> appearing in a patch at review phase)
However, calixte can you please explain me difference in between those two
options.
More precisely, one is a white list and the second one is a black list. Will
you
mix these together or they will be used exclusively?
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87913] max(n, 1) code generation
Date: Wed, 07 Nov 2018 15:28:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
A fix for the MIN/MAX recognition generates
f:
.LFB0:
.cfi_startproc
testl %edi, %edi
movl $1, %eax
cmovne %edi, %eax
ret
it doesn't change g().
>From gcc-bugs-return-620453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 15:52:39 2018
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Subject: [Bug c/66298] -Wmisleading-indentation should also detect missing indentation
Date: Wed, 07 Nov 2018 15:52:00 -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 #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I believe there is no general consistency in the indentation of pragmas, some
projects never indent them, others put them at the same level as the previous
stmt, others at the same level as the next stmt.
To catch the
if (1)
#pragma GCC diagnostics ...
something;
we just should have a separate warning that warns if the body of an
if/else/while/for is a pragma handled as a statement.
Note, for OpenMP, this is covered by the standard and GCC already errors on
OpenMP standalone directives in such contexts, so you get an error for
if (1)
#pragma omp flush
something;
where flush is standalone directive, but not for
if (1)
#pragma omp single
something;
where single is not standalone directive and has associated non-pragma code.
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Subject: [Bug c/39438] Can't compile a wrapper around strftime with -Werror=format-nonliteral
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--- Comment #12 from Alexander Amelkin <groungccg at amelkin dot msk.ru> ---
Also happens with `gcc (Ubuntu 8.1.0-5ubuntu1~16.04) 8.1.0`
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Subject: [Bug ipa/86395] add support of -fopt-info-inline in inliner
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2018-11/msg00463.ht
| |ml
--- Comment #4 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patches: https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00463.html
>From gcc-bugs-return-620457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 16:29:56 2018
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87904] [9 Regression] ICE in lookup_mark, at cp/tree.c:2322 since r265679
Date: Wed, 07 Nov 2018 16:29:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r265879.
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Subject: [Bug c++/87904] [9 Regression] ICE in lookup_mark, at cp/tree.c:2322 since r265679
Date: Wed, 07 Nov 2018 16:29:00 -0000
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--- Comment #1 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Nov 7 16:28:46 2018
New Revision: 265879
URL: https://gcc.gnu.org/viewcvs?rev=265879&root=gcc&view=rev
Log:
[PR C++/87904] lookup ICE
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00468.html
PR c++/87904
* cp-tree.h (struct tree_overload): Fix comment.
* tree.c (ovl_iterator::reveal_node): Propagate OVL_DEDUP_P.
PR c++/87904
* g++.dg/lookup/pr87904.C: New.
Added:
trunk/gcc/testsuite/g++.dg/lookup/pr87904.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/tree.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-620458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 17:17:57 2018
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Subject: [Bug c++/87921] New: Incorrect error "storage size of [array] isn't known (when it is)
Date: Wed, 07 Nov 2018 17:17:00 -0000
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Bug ID: 87921
Summary: Incorrect error "storage size of [array] isn't known
(when it is)
Product: gcc
Version: unknown
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I'm getting an error for what I believe to be valid code. Here's a complete,
minimal example to reproduce it:
// ================================
template<class H>
struct X {
static constexpr long Ary[] = { 1L };
long foo() { return Ary[0]; }
};
void f() {
class L{};
X<L> foo{};
}
// ================================
https://godbolt.org/z/2tGwxo
#1 with x86-64 gcc (trunk)
<source>:3:27: error: storage size of 'X<f()::L>::Ary' isn't known
3 static constexpr long Ary[] = { 1L };
^~~
Clearly the size of the array should be known.
- locally, on both mac and linux I see same results
- in g++6.3, C++17 mode it compiles
- in 7.3 and all versions up through 8.2 and the trunk, in C++ 17 mode it does
not compile.
- in clang++, it compiles.
- moving the function-local class L to file-scope fixes it.
- moving the array outside of the template class fixes it.
- explicitly providing a size to the array declaration fixes it.
>From gcc-bugs-return-620459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 17:36:30 2018
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Subject: [Bug fortran/69654] ICE in gfc_trans_structure_assign
Date: Wed, 07 Nov 2018 17:36:00 -0000
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G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gscfq@t-online.de
--- Comment #6 from G. Steinmetz <gscfq@t-online.de> ---
Update, reduced a bit :
$ cat z1.f90
module m
type t
class(*), pointer :: z => null()
end type
end
program p
contains
subroutine s1
use m
type(t) :: x
call s2(x)
end
subroutine s2(x)
use m
type(t) :: x
end
end
$ gfortran-9-20181104 -c z1.f90
z1.f90:12:0:
12 | end
|
internal compiler error: Segmentation fault
0xb205df crash_signal
../../gcc/toplev.c:325
0x6f3735 gfc_trans_structure_assign(tree_node*, gfc_expr*, bool, bool)
../../gcc/fortran/trans-expr.c:7814
0x6f3282 gfc_trans_subcomponent_assign
../../gcc/fortran/trans-expr.c:7659
0x6f375a gfc_trans_structure_assign(tree_node*, gfc_expr*, bool, bool)
../../gcc/fortran/trans-expr.c:7824
0x6edf0f gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7891
0x6ee14c gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8059
0x6fc779 gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10248
0x6dd90d gfc_init_default_dt(gfc_symbol*, stmtblock_t*, bool)
../../gcc/fortran/trans-decl.c:4067
0x6e4f30 gfc_trans_deferred_vars(gfc_symbol*, gfc_wrapped_block*)
../../gcc/fortran/trans-decl.c:4792
0x6e6ef8 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6614
0x6e6c14 gfc_generate_contained_functions
../../gcc/fortran/trans-decl.c:5524
0x6e6c14 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6441
0x6740a6 translate_all_program_units
../../gcc/fortran/parse.c:6125
0x6740a6 gfc_parse_file()
../../gcc/fortran/parse.c:6328
0x6bc03f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
---
The ICE also goes away when all "use m" are moved to top level :
$ cat z7.f90
module m
type t
class(*), pointer :: z => null()
end type
end
program p
use m
call s1
contains
subroutine s1
type(t) :: x
call s2(x)
end
subroutine s2(x)
type(t) :: x
end
end
>From gcc-bugs-return-620460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 17:38:22 2018
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Subject: [Bug fortran/87922] New: ICE in gfc_wide_strlen, at fortran/scanner.c:142
Date: Wed, 07 Nov 2018 17:38:00 -0000
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Bug ID: 87922
Summary: ICE in gfc_wide_strlen, at fortran/scanner.c:142
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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With a non-scalar-default-char-constant-expr since at least gfortran-5 :
$ cat z1.f90
program p
read (1, asynchronous=['no'])
read (1, asynchronous=[character::])
end
$ cat z2.f90
program p
write (1, asynchronous=['no'])
write (1, asynchronous=[character::])
end
$ gfortran-9-20181104 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb205df crash_signal
../../gcc/toplev.c:325
0x694450 gfc_wide_strlen(unsigned int const*)
../../gcc/fortran/scanner.c:142
0x638587 compare_to_allowed_values
../../gcc/fortran/io.c:2008
0x63b7ca check_io_constraints
../../gcc/fortran/io.c:3797
0x63b7ca match_io
../../gcc/fortran/io.c:4301
0x66a3c1 match_word
../../gcc/fortran/parse.c:65
0x66e1a0 decode_statement
../../gcc/fortran/parse.c:549
0x66e72a next_free
../../gcc/fortran/parse.c:1234
0x66e72a next_statement
../../gcc/fortran/parse.c:1466
0x670a94 parse_spec
../../gcc/fortran/parse.c:3674
0x672807 parse_progunit
../../gcc/fortran/parse.c:5671
0x673e89 gfc_parse_file()
../../gcc/fortran/parse.c:6211
0x6bc03f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-620461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 17:41:14 2018
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Subject: [Bug fortran/87923] New: ICE in gfc_widechar_to_char, at fortran/scanner.c:198
Date: Wed, 07 Nov 2018 17:41:00 -0000
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Bug ID: 87923
Summary: ICE in gfc_widechar_to_char, at fortran/scanner.c:198
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
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With option -fdec and versions 7 to 9 :
$ cat z1.f90
program p
open (1, carriagecontrol=char(1000,4))
open (2, share=char(1000,4))
end
$ gfortran-9-20181104 -c z1.f90 -fdec
f951: internal compiler error: in gfc_widechar_to_char, at
fortran/scanner.c:198
0x694556 gfc_widechar_to_char(unsigned int const*, int)
../../gcc/fortran/scanner.c:198
0x638784 compare_to_allowed_values
../../gcc/fortran/io.c:2091
0x63dcd0 gfc_match_open()
../../gcc/fortran/io.c:2276
0x66a3c1 match_word
../../gcc/fortran/parse.c:65
0x66e335 decode_statement
../../gcc/fortran/parse.c:531
0x66e72a next_free
../../gcc/fortran/parse.c:1234
0x66e72a next_statement
../../gcc/fortran/parse.c:1466
0x670a94 parse_spec
../../gcc/fortran/parse.c:3674
0x672807 parse_progunit
../../gcc/fortran/parse.c:5671
0x673e89 gfc_parse_file()
../../gcc/fortran/parse.c:6211
0x6bc03f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-620462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 18:02:29 2018
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Subject: [Bug gcov-profile/87442] Add options to filter files we want to instrument for code coverage
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87442
--- Comment #9 from calixte <cdenizet at mozilla dot com> ---
(In reply to Martin Liška from comment #8)
> Ok, I've got a patch prototype and I hope I'll be able to sent it before
> the end of this stage1.
>
> > The idea is to add two options to easily include/exclude some files from
> > being instrumented.
> > Here are two use cases:
> > 1) -coverage-exclude=/usr/include/*: typically we remove the data for such
> > files when post-processing the gcno/gcda so we don't need to instrument them
> > and so we could reduce the overhead due to instrumentation.
> > 2) -coverage-filter=.*/foo.cpp:.*/bar.cpp: here we want to only instrument
> > these two files (for example, to display code coverage data for files
> > appearing in a patch at review phase)
>
> However, calixte can you please explain me difference in between those two
> options.
> More precisely, one is a white list and the second one is a black list. Will
> you
> mix these together or they will be used exclusively?
Few things:
i) I use ';' as regex separator (to avoid issues under windows with C:\...)
ii) if exclude is empty and filename is matching any of the regexes in filter
then instrument it.
iii) if filter is empty and filename is not matching any of the regexes in
exclude then instrument it.
iv) if both are not empty and filename is matching any of the regexes in
filter AND is not matching any of the regexes in exclude then instrument it.
Few examples:
i) exclude="^/usr/include/;^/usr/local/include/" => a file is instrumented if
and only if it isn't in /usr/include/ nor in /usr/local/include/
ii) filter="^/home/foo/dev/.*\.cpp;^/home/foo/ved/.*\.cpp" => a file is
instrumented if and only if it's a cpp file somewhere under /home/foo/dev/ or
/home/foo/ved/
iii) exclude="^/usr/include/.*$" and filter="^/usr/.*$" => a file is
instrumented if and only if it's somewhere under /usr/ but not under
/usr/include
My patch for llvm is here:
https://reviews.llvm.org/D52033
If you see something wrong or have idea to improve, please ping me.
>From gcc-bugs-return-620463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 18:03:36 2018
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Subject: [Bug c++/87921] Incorrect error "storage size of [array] isn't known (when it is)
Date: Wed, 07 Nov 2018 18:03:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-07
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Probably started with r241143.
>From gcc-bugs-return-620464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 18:04:47 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87921] [7/8/9 Regression] Incorrect error "storage size of [array] isn't known (when it is)
Date: Wed, 07 Nov 2018 18:04:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Target Milestone|--- |7.4
Summary|Incorrect error "storage |[7/8/9 Regression]
|size of [array] isn't known |Incorrect error "storage
|(when it is) |size of [array] isn't known
| |(when it is)
>From gcc-bugs-return-620465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 19:07:28 2018
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87924] New: OpenACC wait clauses without async-arguments
Date: Wed, 07 Nov 2018 19:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87924
Bug ID: 87924
Summary: OpenACC wait clauses without async-arguments
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: openacc, patch
Severity: normal
Priority: P3
Component: c
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As reported in <https://gcc.gnu.org/ml/gcc-patches/2018-08/msg01973.html>,
we're currently not taking any action for OpenACC wait clauses without
async-arguments.
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Subject: [Bug c++/69348] alias declarations can not be used inside qualifiers of declarators
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-620467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 20:51:48 2018
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Subject: [Bug fortran/87922] ICE in gfc_wide_strlen, at fortran/scanner.c:142
Date: Wed, 07 Nov 2018 20:51:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-07
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from kargl at gcc dot gnu.org ---
Index: gcc/fortran/io.c
===================================================================
--- gcc/fortran/io.c (revision 265885)
+++ gcc/fortran/io.c (working copy)
@@ -2232,6 +2232,21 @@ gfc_match_open (void)
if (!is_char_type ("ASYNCHRONOUS", open->asynchronous))
goto cleanup;
+ if (open->asynchronous->ts.kind != 1)
+ {
+ gfc_error ("ASYNCHRONOUS= specifier at %L must have be of default "
+ "CHARACTER kind", &open->asynchronous->where);
+ return MATCH_ERROR;
+ }
+
+ if (open->asynchronous->expr_type == EXPR_ARRAY
+ || open->asynchronous->expr_type == EXPR_STRUCTURE)
+ {
+ gfc_error ("ASYNCHRONOUS= specifier at %L must have be scalar",
+ &open->asynchronous->where);
+ return MATCH_ERROR;
+ }
+
if (open->asynchronous->expr_type == EXPR_CONSTANT)
{
static const char * asynchronous[] = { "YES", "NO", NULL };
@@ -3792,6 +3807,21 @@ if (condition) \
if (!is_char_type ("ASYNCHRONOUS", dt->asynchronous))
return MATCH_ERROR;
+
+ if (dt->asynchronous->ts.kind != 1)
+ {
+ gfc_error ("ASYNCHRONOUS= specifier at %L must have be of default "
+ "CHARACTER kind", &dt->asynchronous->where);
+ return MATCH_ERROR;
+ }
+
+ if (dt->asynchronous->expr_type == EXPR_ARRAY
+ || dt->asynchronous->expr_type == EXPR_STRUCTURE)
+ {
+ gfc_error ("ASYNCHRONOUS= specifier at %L must have be scalar",
+ &dt->asynchronous->where);
+ return MATCH_ERROR;
+ }
if (!compare_to_allowed_values
("ASYNCHRONOUS", asynchronous, NULL, NULL,
>From gcc-bugs-return-620468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 20:53:17 2018
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From: "gjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/78707] [6 Regression] internal compiler error: in push_reload, at reload.c:1349
Date: Wed, 07 Nov 2018 20:53:00 -0000
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Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.1.1, 8.0.1
--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> Does this fail also with 7.x and later?
The test case passes fine for me with 7.1.1 and 8.0.1.
>From gcc-bugs-return-620470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Nov 07 20:56:15 2018
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Subject: [Bug other/56183] [meta-bug][avr] Problems with register allocation
Date: Wed, 07 Nov 2018 20:56:00 -0000
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Bug 56183 depends on bug 78707, which changed state.
Bug 78707 Summary: [6 Regression] internal compiler error: in push_reload, at reload.c:1349
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78707
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug middle-end/78707] [6 Regression] internal compiler error: in push_reload, at reload.c:1349
Date: Wed, 07 Nov 2018 20:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78707
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|6.5 |7.0
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Thus fixed in 7.x.
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Subject: [Bug middle-end/87854] [9 Regression] gcc.c-torture/compile/pr46534.c ICE for 16-bit size_t
Date: Wed, 07 Nov 2018 21:00:00 -0000
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--- Comment #1 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to Jozef Lawrynowicz from comment #0)
> Rather than ICE'ing should there be some error message about object size
> being too large?
Yes. In any case, there should be no ICE whatever code you provide.
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Subject: [Bug fortran/87919] Incorrect fortran handling of -fno-* options
Date: Wed, 07 Nov 2018 21:29:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
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Subject: [Bug fortran/85982] ICE in resolve_component, at fortran/resolve.c:13696
Date: Wed, 07 Nov 2018 21:31:00 -0000
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Fritz Reese <foreese at gcc dot gnu.org> changed:
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Subject: [Bug fortran/87919] Incorrect fortran handling of -fno-* options
Date: Wed, 07 Nov 2018 21:47:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The -fdec-structure part has been posted in
https://gcc.gnu.org/ml/fortran/2018-11/msg00029.html
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Subject: [Bug c/87691] transparent_union attribute does not work with MODE_PARTIAL_INT
Date: Wed, 07 Nov 2018 22:07:00 -0000
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--- Comment #10 from jozefl at gcc dot gnu.org ---
Author: jozefl
Date: Wed Nov 7 22:06:26 2018
New Revision: 265894
URL: https://gcc.gnu.org/viewcvs?rev=265894&root=gcc&view=rev
Log:
2018-11-07 Jozef Lawrynowicz <jozef.l@mittosystems.com>
PR c/87691
gcc/ChangeLog:
* stor-layout.c (compute_record_mode): Set TYPE_MODE of UNION_TYPE
to the mode of the widest field iff the widest field has mode class
MODE_INT, or MODE_PARTIAL_INT and the union would be passed by
reference.
gcc/testsuite/ChangeLog:
* gcc.target/msp430/pr87691.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/msp430/pr87691.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/stor-layout.c
trunk/gcc/testsuite/ChangeLog
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From: "eyalroz at technion dot ac.il" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/87925] New: Missed optimization: Single-value if-then-else chains treated differently than switch'es
Date: Wed, 07 Nov 2018 22:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87925
Bug ID: 87925
Summary: Missed optimization: Single-value if-then-else chains
treated differently than switch'es
Product: gcc
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Have a look at this GodBolt example: https://gcc.godbolt.org/z/zR03rA
On one hand, we have:
void foo(int i) {
switch (i) {
case 1: boo<1>(); break;
case 2: boo<2>(); break;
case 3: boo<3>(); break;
case 4: boo<4>(); break;
// etc. etc.
}
}
on the other hand we have the same, but using an if-then-else chain:
void bar(int i) {
if (i == 1) boo<1>();
else if (i == 2) boo<2>();
else if (i == 3) boo<3>();
else if (i == 4) boo<4>();
// etc. etc.
}
The switch statement gets a jump table; the if-then-else chain - does not. At
the link, there are 20 cases; g++ starts using a jump table with 4 switch
values.
This is not just a matter of programmers needing to remember to prefer switch
statements (which it's better not to require of them), but rather that
if-then-else chains are sometimes generated by expansion of templated code,
e.g. this example for checking for membership in a set of values (= all values
of an enum):
https://stackoverflow.com/a/53191264/1593077
while switch() statements of variable do not get generated AFAICT. It would
thus be quite useful if such generated code would not result in
highly-inefficient long chains of comparisons.
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Subject: [Bug rtl-optimization/87925] Missed optimization: Distinct-value if-then-else chains treated differently than switch statements
Date: Wed, 07 Nov 2018 22:27:00 -0000
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Eyal Rozenberg <eyalroz at technion dot ac.il> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |9.0
--- Comment #1 from Eyal Rozenberg <eyalroz at technion dot ac.il> ---
See also:
https://stackoverflow.com/questions/53198276/do-compilers-optimize-switches-differently-than-long-if-then-else-chains
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Subject: [Bug tree-optimization/87926] New: bad array-index warning breaks --disable-checking bootstrap
Date: Wed, 07 Nov 2018 22:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87926
Bug ID: 87926
Summary: bad array-index warning breaks --disable-checking
bootstrap
Product: gcc
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Created attachment 44967
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44967&action=edit
cc1plus bug.ii -O2 -W -Wall -quiet
x86_64-linux --disable-checking bootstrap fails with:
../../../src/gcc/bitmap.c: In function ‘unsigned int
bitmap_last_set_bit(const_bitmap)’:
../../../src/gcc/bitmap.c:1191:26: error: array subscript -1 is below array
bounds of ‘const BITMAP_WORD [2]’ {aka ‘const long unsigned int [2]’}
[-Werror=array-bounds]
1191 | word = elt->bits[ix];
| ~~~~~~~~~~~~^
Attached is a reduced testcase
Adding:
bitmap.o-warn = -Wno-error
to gcc/Makefile.in works around the problem.
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Subject: [Bug tree-optimization/87926] bad array-index warning breaks --disable-checking bootstrap
Date: Wed, 07 Nov 2018 22:50:00 -0000
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--- Comment #1 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Wed Nov 7 22:50:20 2018
New Revision: 265899
URL: https://gcc.gnu.org/viewcvs?rev=265899&root=gcc&view=rev
Log:
[PR/87936] --disable-checking bootstrap break
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00502.html
PR 87926
* Makefile.in (bitmap.o-warn): Add -Wno-error to unbreak
--disable-checking bootstrap.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/Makefile.in
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Subject: [Bug c++/79393] [7/8/9 Regression] cc1plus rejects valid code with noexcept
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|SUSPENDED |ASSIGNED
--- Comment #11 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Is 2336 now has a proposed solution.
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Subject: [Bug c/87927] New: ICE: segmentation fault with patchable_function_entry attribute for msp430-elf -mlarge
Date: Thu, 08 Nov 2018 00:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87927
Bug ID: 87927
Summary: ICE: segmentation fault with patchable_function_entry
attribute for msp430-elf -mlarge
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: jozef.l at mittosystems dot com
Target Milestone: ---
Use of the patchable_function_entry attribute with msp430-elf in the large
memory model causes a segfault on trunk.
For example in c-c++-common/patchable_function_entry-decl.c:
> extern int a;
>
> int f3 (void) __attribute__((patchable_function_entry(2)));
>
> int
> __attribute__((noinline))
> f3 (void)
> {
> return 5*a;
> }
> gcc -mlarge -fpatchable-function-entry=3,1 -S gcc/testsuite/c-c++-common/patchable_function_entry-decl.c
> gcc/testsuite/c-c++-common/patchable_function_entry-decl.c: In function 'f3':
> gcc/testsuite/c-c++-common/patchable_function_entry-decl.c:18:1: internal compiler error: Segmentation fault
> 0xb5e4af crash_signal
> ../../gcc/toplev.c:325
> 0xb59d41 default_print_patchable_function_entry(_IO_FILE*, unsigned long, bool)
> ../../gcc/targhooks.c:1816
> 0xe94d2c assemble_start_function(tree_node*, char const*)
> ../../gcc/varasm.c:1903
> 0x84188f rest_of_handle_final
> ../../gcc/final.c:4645
> 0x84188f execute
> ../../gcc/final.c:4723
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Subject: [Bug c/87927] ICE: segmentation fault with patchable_function_entry attribute for msp430-elf -mlarge
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--- Comment #1 from Jozef Lawrynowicz <jozef.l at mittosystems dot com> ---
Created attachment 44968
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44968&action=edit
proposed patch
In default_print_patchable_function_entry, integer_asm_op is passed
POINTER_SIZE_UNITS. For msp430-elf -mlarge, this is 3, which is not handled in
integer_asm_op, so it returns NULL.
fputs is directly writing out the return value of integer_asm_op, so when this
is NULL we are segfaulting.
Attached is a proposed patch which implements
TARGET_ASM_{,UN}ALIGNED_P{S,D,T}I_OP, so integer_asm_op will not return NULL
for values < 16.
This fixes the c-c++-common/patchable_function_entry* tests but is otherwise
untested.
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Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jim Wilson <wilson at gcc dot gnu.org> ---
The proposed psABI change was accepted, so no gcc change is necessary.
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Subject: [Bug c/87927] ICE: segmentation fault with patchable_function_entry attribute for msp430-elf -mlarge
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Jozef Lawrynowicz <jozef.l at mittosystems dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44968|0 |1
is obsolete| |
--- Comment #2 from Jozef Lawrynowicz <jozef.l at mittosystems dot com> ---
Created attachment 44969
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44969&action=edit
proposed patch (fixed)
Fixed wrong ordering of new elements in "struct asm_int_op"
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Subject: [Bug driver/80828] Command line option -e not documented
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--- Comment #2 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Thu Nov 8 01:26:28 2018
New Revision: 265903
URL: https://gcc.gnu.org/viewcvs?rev=265903&root=gcc&view=rev
Log:
2018-11-07 Sandra Loosemore <sandra@codesourcery.com>
PR driver/80828
gcc/
* doc/invoke.texi (Option Summary): Add -e and --entry.
(Link Options): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug target/87927] ICE: segmentation fault with patchable_function_entry attribute for msp430-elf -mlarge
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Patches should be sent to gcc-patches@ after reading
https://gcc.gnu.org/contribute.html .
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Subject: [Bug driver/80828] Command line option -e not documented
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sandra at gcc dot gnu.org changed:
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--- Comment #3 from sandra at gcc dot gnu.org ---
Documentation for this option has been added on trunk.
There are several driver options, including this one, that don't include any
documentation for the --help output. I'm not sure if that was deliberate or
not, but if it's a problem, it would be worth doing a review to see what else
is missing.
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
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--- Comment #3 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Mine
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Subject: [Bug middle-end/42726] -fno-common documentation inaccuracy
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--- Comment #1 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Thu Nov 8 03:37:32 2018
New Revision: 265906
URL: https://gcc.gnu.org/viewcvs?rev=265906&root=gcc&view=rev
Log:
2018-11-07 Sandra Loosemore <sandra@codesourcery.com>
PR middle-end/42726
gcc/
* doc/invoke.texi (Code Gen Options): Clarify -fno-common behavior.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug rtl-optimization/86438] [8/9 Regression] wrong code at -Os
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--- Comment #4 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Created attachment 44970
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44970&action=edit
candidate patch
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Subject: [Bug middle-end/42726] -fno-common documentation inaccuracy
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--- Comment #2 from sandra at gcc dot gnu.org ---
This has (finally) been fixed on trunk.
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Subject: [Bug sanitizer/80998] Implement -fsanitize=pointer-overflow
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Bug 80998 depends on bug 81902, which changed state.
Bug 81902 Summary: new -fsanitize=pointer-overflow option undocumented
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81902
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Subject: [Bug sanitizer/81902] new -fsanitize=pointer-overflow option undocumented
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--- Comment #3 from sandra at gcc dot gnu.org ---
Closing this issue as it has been fixed.
>From gcc-bugs-return-620494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 07:49:24 2018
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Subject: [Bug rtl-optimization/86438] [8/9 Regression] wrong code at -Os
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--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
The candidate patch regresses the regression test added along with the fix for
bug 49095. At first I thought it should, but there seems to be logic in place
to adjust the compare for the flags-clobbering insn.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87928] New: ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
Date: Thu, 08 Nov 2018 07:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87928
Bug ID: 87928
Summary: ICE in ix86_compute_frame_layout, at
config/i386/i386.c:11161 since r228607
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: marxin at gcc dot gnu.org
Target Milestone: ---
Following causes ICE:
$ gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/aggregate-ret4.c
-mabi=ms -O1 -mstackrealign
during RTL pass: pro_and_epilogue
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/aggregate-ret4.c: In
function ‘bar’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/aggregate-ret4.c:24:1:
internal compiler error: in ix86_compute_frame_layout, at
config/i386/i386.c:11161
24 | }
| ^
0x73ba80 ix86_compute_frame_layout
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:11161
0x111ef6f ix86_finalize_stack_frame_flags
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:12925
0x11255e4 ix86_expand_prologue()
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:13035
0x145df8a gen_prologue()
/home/marxin/Programming/gcc/gcc/config/i386/i386.md:12984
0x1107728 target_gen_prologue
/home/marxin/Programming/gcc/gcc/config/i386/i386.md:18928
0xab61c1 make_prologue_seq
/home/marxin/Programming/gcc/gcc/function.c:5713
0xab6367 thread_prologue_and_epilogue_insns()
/home/marxin/Programming/gcc/gcc/function.c:5830
0xab6a96 rest_of_handle_thread_prologue_and_epilogue
/home/marxin/Programming/gcc/gcc/function.c:6321
0xab6a96 execute
/home/marxin/Programming/gcc/gcc/function.c:6363
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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/87928] [7/8/9 Regression] ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
Date: Thu, 08 Nov 2018 07:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87928
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
One more similar back-trace:
$ gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/func-1.c
-Ofast -mcall-ms2sysv-xlogues -mandroid -mavx512vpopcntdq
during RTL pass: reload
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/func-1.c:
In function ‘func_cross’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/func-1.c:20:1:
internal compiler error: in ix86_compute_frame_layout, at
config/i386/i386.c:11169
20 | }
| ^
0x73bae0 ix86_compute_frame_layout
/home/marxin/Programming/gcc/gcc/config/i386/i386.c:11169
0xc268af update_reg_eliminate
/home/marxin/Programming/gcc/gcc/lra-eliminations.c:1207
0xc28f97 lra_eliminate(bool, bool)
/home/marxin/Programming/gcc/gcc/lra-eliminations.c:1460
0xc2058a lra_constraints(bool)
/home/marxin/Programming/gcc/gcc/lra-constraints.c:4716
0xc0d2a0 lra(_IO_FILE*)
/home/marxin/Programming/gcc/gcc/lra.c:2446
0xbbe87c do_reload
/home/marxin/Programming/gcc/gcc/ira.c:5469
0xbbe87c execute
/home/marxin/Programming/gcc/gcc/ira.c:5653
>From gcc-bugs-return-620497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:01:02 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87929] New: ICE in verify_gimple failed
Date: Thu, 08 Nov 2018 08:01:00 -0000
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Bug ID: 87929
Summary: ICE in verify_gimple failed
Product: gcc
Version: 9.0
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Severity: normal
Priority: P3
Component: tree-optimization
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Very old ICE, probably caused by strange option combination:
$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/f2c_4.c
-fexceptions -fnon-call-exceptions -fsignaling-nans
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/f2c_4.c: In function
‘f2c_4c__’:
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/f2c_4.c:30:6: error:
statement marked for throw, but doesn’t
30 | void f2c_4c__(void) {
| ^~~~~~~~
_7 = _17;
during GIMPLE pass: cplxlower0
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/f2c_4.c:30:6: internal
compiler error: verify_gimple failed
0xdf2d71 verify_gimple_in_cfg(function*, bool)
/home/marxin/Programming/gcc/gcc/tree-cfg.c:5422
0xcb553e execute_function_todo
/home/marxin/Programming/gcc/gcc/passes.c:1925
0xcb5e5a execute_todo
/home/marxin/Programming/gcc/gcc/passes.c:1979
Please submit a full bug report,
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Subject: [Bug target/87913] max(n, 1) code generation
Date: Thu, 08 Nov 2018 08:03:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 8 08:03:12 2018
New Revision: 265909
URL: https://gcc.gnu.org/viewcvs?rev=265909&root=gcc&view=rev
Log:
2018-11-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/87913
* tree-ssa-phiopt.c (minmax_replacement): Turn EQ/NE compares
of extreme values to ordered comparisons.
* gcc.dg/tree-ssa/phi-opt-20.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-20.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-phiopt.c
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Subject: [Bug target/87913] max(n, 1) code generation
Date: Thu, 08 Nov 2018 08:03:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
phiopt issue fixed, target issue (not using adc) remains.
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Subject: [Bug sanitizer/87930] New: [8/9 Regression] ICE in emit_library_call_value_1, at calls.c:5422 since r249903
Date: Thu, 08 Nov 2018 08:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87930
Bug ID: 87930
Summary: [8/9 Regression] ICE in emit_library_call_value_1, at
calls.c:5422 since r249903
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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: ---
Following causes ICE:
$ gcc ice.i -mabi=ms -fsanitize=address
during RTL pass: expand
ice.i: In function ‘a’:
ice.i:1:32: internal compiler error: in emit_library_call_value_1, at
calls.c:5253
1 | int __attribute__ ((sysv_abi)) a (__builtin_va_list b)
| ^
0x90f2a5 emit_library_call_value_1(int, rtx_def*, rtx_def*, libcall_type,
machine_mode, int, std::pair<rtx_def*, machine_mode>*)
/home/marxin/Programming/gcc/gcc/calls.c:5252
0xdc216c emit_library_call_value(rtx_def*, rtx_def*, libcall_type,
machine_mode, rtx_def*, machine_mode)
/home/marxin/Programming/gcc/gcc/rtl.h:4185
0xdc216c asan_emit_stack_protection(rtx_def*, rtx_def*, unsigned int, long*,
tree_node**, int)
/home/marxin/Programming/gcc/gcc/asan.c:1370
0x924ced expand_used_vars
/home/marxin/Programming/gcc/gcc/cfgexpand.c:2273
0x9270e2 execute
/home/marxin/Programming/gcc/gcc/cfgexpand.c:6268
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Subject: [Bug sanitizer/87930] [8/9 Regression] ICE in emit_library_call_value_1, at calls.c:5422 since r249903
Date: Thu, 08 Nov 2018 08:14:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-11-08
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> ---
Mine.
>From gcc-bugs-return-620503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:17:22 2018
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Subject: [Bug tree-optimization/87931] [9 Regression] ICE in vectorizable_reduction, at tree-vect-loop.c:6193 since r265876
Date: Thu, 08 Nov 2018 08:17:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-11-8
Known to work| |8.2.0
Target Milestone|--- |9.0
Known to fail| |9.0
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Subject: [Bug tree-optimization/87931] New: [9 Regression] ICE in vectorizable_reduction, at tree-vect-loop.c:6193 since r265876
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87931
Bug ID: 87931
Summary: [9 Regression] ICE in vectorizable_reduction, at
tree-vect-loop.c:6193 since r265876
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Following is ICEing:
$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/vect/vect-outer-fir.c
-O3 -fno-tree-copy-prop -fgraphite-identity
during GIMPLE pass: vect
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/vect/vect-outer-fir.c: In
function ‘fir’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/vect/vect-outer-fir.c:37:6:
internal compiler error: in vectorizable_reduction, at tree-vect-loop.c:6193
37 | void fir (){
| ^~~
0x156cd9e vectorizable_reduction(_stmt_vec_info*, gimple_stmt_iterator*,
_stmt_vec_info**, _slp_tree*, _slp_instance*, vec<stmt_info_for_cost, va_heap,
vl_ptr>*)
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:6193
0x154d64a vect_analyze_stmt(_stmt_vec_info*, bool*, _slp_tree*, _slp_instance*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
/home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:9543
0x155e51b vect_analyze_loop_operations
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:1574
0x155f9d9 vect_analyze_loop_2
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:1969
0x1560ff1 vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*)
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:2268
0x15a0fc8 try_vectorize_loop_1
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:873
0x15a17af try_vectorize_loop
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:1015
0x15a198b vectorize_loops()
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:1097
0x13fb6a7 execute
/home/marxin/Programming/gcc/gcc/tree-ssa-loop.c:414
>From gcc-bugs-return-620504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:21:03 2018
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87928] [7/8/9 Regression] ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
Date: Thu, 08 Nov 2018 08:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87928
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |daniel.santos at pobox dot com
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Martin Liška from comment #1)
> One more similar back-trace:
>
> $ gcc
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/
> func-1.c -Ofast -mcall-ms2sysv-xlogues -mandroid -mavx512vpopcntdq
> during RTL pass: reload
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/
> func-1.c: In function ‘func_cross’:
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/
> func-1.c:20:1: internal compiler error: in ix86_compute_frame_layout, at
> config/i386/i386.c:11169
The ICE happens for different reason, it is not due to alignment issues as in
previous one, but happens with -mcall-ms2sysv-xlogues. CC author.
>From gcc-bugs-return-620505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:29:56 2018
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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/87932] New: Missing profile count data file not found [-Wmissing-profile] during profiledbootstrap
Date: Thu, 08 Nov 2018 08:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87932
Bug ID: 87932
Summary: Missing profile count data file not found
[-Wmissing-profile] during profiledbootstrap
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Using patch candidate for PR87706 I still see some problematic source files
where we miss a profile data file:
../../gcc/c-family/cppspec.c:200:37: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/c-family/cppspec.gcda’ profile count
data file not found [-Wmissing-profile]
../../gcc/cp/g++spec.c:405:37: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/cp/g++spec.gcda’ profile count data
file not found [-Wmissing-profile]
../../gcc/errors.c:134:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/errors.gcda’ profile count data file
not found [-Wmissing-profile]
../../gcc/file-prefix-map.h:26:48: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/xcoffout.gcda’ profile count data file
not found [-Wmissing-profile]
../../gcc/gcc-ar.c:254:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gcc-ar.gcda’ profile count data file
not found [-Wmissing-profile]
../../gcc/gcov.c:3122:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gcov.gcda’ profile count data file not
found [-Wmissing-profile]
../../gcc/gcov-dump.c:464:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gcov-dump.gcda’ profile count data
file not found [-Wmissing-profile]
../../gcc/gcov-tool.c:611:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gcov-tool.gcda’ profile count data
file not found [-Wmissing-profile]
../../gcc/gengtype.c:5334:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gengtype.gcda’ profile count data file
not found [-Wmissing-profile]
../../gcc/gengtype-lex.l:219:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gengtype-lex.gcda’ profile count data
file not found [-Wmissing-profile]
../../gcc/gengtype-parse.c:1179:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gengtype-parse.gcda’ profile count
data file not found [-Wmissing-profile]
../../gcc/gengtype-state.c:2616:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gengtype-state.gcda’ profile count
data file not found [-Wmissing-profile]
../../gcc/hw-doloop.c:666:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/hw-doloop.gcda’ profile count data
file not found [-Wmissing-profile]
../../gcc/../libgcc/libgcov-driver.c:569:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/libgcov-driver-tool.gcda’ profile
count data file not found [-Wmissing-profile]
../../gcc/../libgcc/libgcov-merge.c:185:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/libgcov-merge-tool.gcda’ profile count
data file not found [-Wmissing-profile]
../../gcc/../libgcc/libgcov-util.c:1339:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/libgcov-util.gcda’ profile count data
file not found [-Wmissing-profile]
../../gcc/lto/lto-object.c:378:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/lto/lto-object.gcda’ profile count
data file not found [-Wmissing-profile]
../../gcc/lto/lto-partition.c:1204:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/lto/lto-partition.gcda’ profile count
data file not found [-Wmissing-profile]
../../gcc/lto/lto-symtab.c:1104:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/lto/lto-symtab.gcda’ profile count
data file not found [-Wmissing-profile]
../../gcc/lto-wrapper.c:1815:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/lto-wrapper.gcda’ profile count data
file not found [-Wmissing-profile]
gcc-nm.c:254:1: warning: ‘/home/marxin/Programming/gcc/objdir/gcc/gcc-nm.gcda’
profile count data file not found [-Wmissing-profile]
gcc-ranlib.c:254:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/gcc-ranlib.gcda’ profile count data
file not found [-Wmissing-profile]
../../gcc/resource.c:1329:1: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/resource.gcda’ profile count data file
not found [-Wmissing-profile]
./gt-lto-lto.h:156:2: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/lto/lto.gcda’ profile count data file
not found [-Wmissing-profile]
./gt-lto-lto-lang.h:89:2: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/lto/lto-lang.gcda’ profile count data
file not found [-Wmissing-profile]
./insn-flags.h:13249:91: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/vmsdbgout.gcda’ profile count data
file not found [-Wmissing-profile]
insn-peep.c:43:20: warning:
‘/home/marxin/Programming/gcc/objdir/gcc/insn-peep.gcda’ profile count data
file not found [-Wmissing-profile]
../../libbacktrace/print.c:92:1: warning:
‘/home/marxin/Programming/gcc/objdir/libbacktrace/.libs/print.gcda’ profile
count data file not found [-Wmissing-profile]
../../libbacktrace/simple.c:108:1: warning:
‘/home/marxin/Programming/gcc/objdir/libbacktrace/.libs/simple.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/alloca.c:215:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/alloca.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/alloca.c:215:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/alloca.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/choose-temp.c:74:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/choose-temp.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/choose-temp.c:74:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/choose-temp.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/cp-demangle.c:6609:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/cp-demangle.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/cp-demint.c:237:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/cp-demint.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/cplus-dem.c:5033:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/cplus-dem.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/crc32.c:179:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/crc32.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/crc32.c:179:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/crc32.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/d-demangle.c:1645:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/d-demangle.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/dwarfnames.c:83: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/dwarfnames.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/dyn-string.c:397:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/dyn-string.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/dyn-string.c:397:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/dyn-string.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/fdmatch.c:68:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/fdmatch.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/fdmatch.c:68:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/fdmatch.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/fibheap.c:486:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/fibheap.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/fibheap.c:486:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/fibheap.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/filename_cmp.c:221:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/filename_cmp.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/floatformat.c:706:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/floatformat.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/floatformat.c:706:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/floatformat.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/fopen_unlocked.c:129:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/fopen_unlocked.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/getpwd.c:106:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/getpwd.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/getruntime.c:120:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/getruntime.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/hex.c:192:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/hex.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/lbasename.c:84:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/lbasename.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/lrealpath.c:157:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/lrealpath.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/make-relative-prefix.c:430:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/make-relative-prefix.gcda’
profile count data file not found [-Wmissing-profile]
../../libiberty/md5.c:440:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/md5.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/objalloc.c:298:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/objalloc.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/objalloc.c:298:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/objalloc.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/obstack.c:374:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/obstack.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/partition.c:182:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/partition.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/pexecute.c:124:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pexecute.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/pexecute.c:124:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/pexecute.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/pex-one.c:43:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pex-one.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/pex-one.c:43:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/pex-one.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/physmem.c:284:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/physmem.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/physmem.c:284:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/physmem.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/regex.c:8131:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/regex.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/rust-demangle.c:348:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/rust-demangle.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/setproctitle.c:48:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/setproctitle.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/setproctitle.c:48:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/setproctitle.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/sha1.c:414:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/sha1.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/sha1.c:414:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/sha1.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/simple-object.c:561:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/simple-object.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/simple-object-coff.c:805:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/simple-object-coff.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/simple-object-elf.c:1576:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/simple-object-elf.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/simple-object-mach-o.c:1379:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/simple-object-mach-o.gcda’
profile count data file not found [-Wmissing-profile]
../../libiberty/simple-object-xcoff.c:1062:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/simple-object-xcoff.gcda’
profile count data file not found [-Wmissing-profile]
../../libiberty/sort.c:131:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/sort.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/sort.c:131:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/sort.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/spaces.c:68:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/spaces.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/spaces.c:68:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/spaces.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/splay-tree.c:611:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/splay-tree.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/stack-limit.c:63:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/stack-limit.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/strerror.c:773:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/strerror.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/strerror.c:773:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/strerror.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/strsignal.c:536:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/strsignal.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/strsignal.c:536:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/strsignal.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/timeval-utils.c:87:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/timeval-utils.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/timeval-utils.c:87:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/timeval-utils.gcda’ profile
count data file not found [-Wmissing-profile]
../../libiberty/unlink-if-ordinary.c:72:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/unlink-if-ordinary.gcda’
profile count data file not found [-Wmissing-profile]
../../libiberty/xatexit.c:99:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/xatexit.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/xatexit.c:99:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/xatexit.gcda’ profile count data
file not found [-Wmissing-profile]
../../libiberty/xmemdup.c:41:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/xmemdup.gcda’ profile count
data file not found [-Wmissing-profile]
../../libiberty/xstrndup.c:57:1: warning:
‘/home/marxin/Programming/gcc/objdir/libiberty/pic/xstrndup.gcda’ profile count
data file not found [-Wmissing-profile]
../../zlib/compress.c:86:1: warning:
‘/home/marxin/Programming/gcc/objdir/zlib/libz_a-compress.gcda’ profile count
data file not found [-Wmissing-profile]
../../zlib/gzclose.c:25:1: warning:
‘/home/marxin/Programming/gcc/objdir/zlib/libz_a-gzclose.gcda’ profile count
data file not found [-Wmissing-profile]
../../zlib/gzlib.c:618:1: warning:
‘/home/marxin/Programming/gcc/objdir/zlib/libz_a-gzlib.gcda’ profile count data
file not found [-Wmissing-profile]
../../zlib/gzread.c:654:1: warning:
‘/home/marxin/Programming/gcc/objdir/zlib/libz_a-gzread.gcda’ profile count
data file not found [-Wmissing-profile]
../../zlib/gzwrite.c:665:1: warning:
‘/home/marxin/Programming/gcc/objdir/zlib/libz_a-gzwrite.gcda’ profile count
data file not found [-Wmissing-profile]
../../zlib/infback.c:640:1: warning:
‘/home/marxin/Programming/gcc/objdir/zlib/libz_a-infback.gcda’ profile count
data file not found [-Wmissing-profile]
../../zlib/uncompr.c:93:1: warning:
‘/home/marxin/Programming/gcc/objdir/zlib/libz_a-uncompr.gcda’ profile count
data file not found [-Wmissing-profile]
>From gcc-bugs-return-620506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:30:55 2018
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Subject: [Bug bootstrap/87932] Missing profile count data file not found [-Wmissing-profile] during profiledbootstrap
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-11-08
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> ---
Let me fix it.
>From gcc-bugs-return-620507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:31:12 2018
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Subject: [Bug sanitizer/87930] [8/9 Regression] ICE in emit_library_call_value_1, at calls.c:5422 since r249903
Date: Thu, 08 Nov 2018 08:31:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
$ cat ice.i
int __attribute__ ((sysv_abi)) a (__builtin_va_list b)
{
__builtin_va_arg(b, long);
}
>From gcc-bugs-return-620508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:32:33 2018
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87928] [7/8/9 Regression] ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
Date: Thu, 08 Nov 2018 08:32:00 -0000
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #2)
> (In reply to Martin Liška from comment #1)
> > One more similar back-trace:
> >
> > $ gcc
> > /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/
> > func-1.c -Ofast -mcall-ms2sysv-xlogues -mandroid -mavx512vpopcntdq
> > during RTL pass: reload
> > /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/
> > func-1.c: In function ‘func_cross’:
> > /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/x86_64/abi/callabi/
> > func-1.c:20:1: internal compiler error: in ix86_compute_frame_layout, at
> > config/i386/i386.c:11169
>
> The ICE happens for different reason, it is not due to alignment issues as
> in previous one, but happens with -mcall-ms2sysv-xlogues. CC author.
Actually, the testcase doesn't ICE for me.
>From gcc-bugs-return-620509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:38:43 2018
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Subject: [Bug web/87933] New: Bad headers and titles for:
Date: Thu, 08 Nov 2018 08:38:00 -0000
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Bug ID: 87933
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Following pages have equal title and header:
https://gcc.gnu.org/install/configure.html
https://gcc.gnu.org/install/build.html
https://gcc.gnu.org/install/finalinstall.html
all have 'Installing GCC' title.
>From gcc-bugs-return-620510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 08:41:24 2018
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Subject: [Bug c++/87934] New: [8 regression] struct with NSDMI of enum makes initialization a non-constant expression
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Bug ID: 87934
Summary: [8 regression] struct with NSDMI of enum makes
initialization a non-constant expression
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Version: 8.2.1
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Following code does not compile in g++8 and trunk, while it compiles with g++7
and older.
struct Foo
{
enum
{
BAR
} bar = BAR;
};
constexpr Foo foo{};
If bar NSDMI is changed to {}, it works. Also explicitly providing initializer
in foo variable declaration fixes it as well.
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Subject: [Bug sanitizer/87930] [8/9 Regression] ICE in emit_library_call_value_1, at calls.c:5422 since r249903
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I guess we want to report an error when one wants to use MS ABI with sanitizer?
>From gcc-bugs-return-620512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:08:58 2018
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Subject: [Bug rtl-optimization/86438] [8/9 Regression] wrong code at -Os
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Alexandre Oliva <aoliva at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44970|0 |1
is obsolete| |
--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Created attachment 44971
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44971&action=edit
another candidate patch
This one does not regress pr49095 with -m32, but -m64 scan-assembler-times
fails before and after.
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Subject: [Bug tree-optimization/87917] ICE in initialize_matrix_A at gcc/tree-data-ref.c:3150
Date: Thu, 08 Nov 2018 09:10:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-08
CC| |rguenth at gcc dot gnu.org
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think we have some duplicates here. dependence analysis use of int_cst_value
is fishy and it doesn't properly guard any of its inputs for its internal use
of 'int' as the underlying type for dependence distances... (think of
overflows,
etc.):
static tree
initialize_matrix_A (lambda_matrix A, tree chrec, unsigned index, int mult)
{
gcc_assert (chrec);
switch (TREE_CODE (chrec))
{
case POLYNOMIAL_CHREC:
A[index][0] = mult * int_cst_value (CHREC_RIGHT (chrec));
return initialize_matrix_A (A, CHREC_LEFT (chrec), index + 1, mult);
If CHREC_RIGHT doesn't fit in an 'int' or if multiplying by mult overflows
we're doomed (wrong-code, etc.). Making the lambda matrix entries
gmp values or widest_ints might be the (expensive) solution here.
int_cst_value needs a better name btw...
As said, there are dups.
>From gcc-bugs-return-620515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:13:49 2018
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Subject: [Bug tree-optimization/87926] bad array-index warning breaks --disable-checking bootstrap
Date: Thu, 08 Nov 2018 09:13:00 -0000
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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> ---
Please use -Wno-error=array-bounds instead of disabling _all_ errors.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
>From gcc-bugs-return-620514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:13:04 2018
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Subject: [Bug tree-optimization/87925] Missed optimization: Distinct-value if-then-else chains treated differently than switch statements
Date: Thu, 08 Nov 2018 09:13:00 -0000
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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> ---
IIRC there was some work turning if-then-else chains into switches (and
possibly back to a tree)
>From gcc-bugs-return-620516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:14:42 2018
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Subject: [Bug target/87928] [7/8/9 Regression] ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
Date: Thu, 08 Nov 2018 09:14:00 -0000
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>From gcc-bugs-return-620517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:15:58 2018
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Subject: [Bug tree-optimization/87929] ICE in verify_gimple failed
Date: Thu, 08 Nov 2018 09:15:00 -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> ---
Looks like some folding happens but we forget to cleanup stmts. Mine.
>From gcc-bugs-return-620518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:17:12 2018
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Subject: [Bug tree-optimization/87925] Missed optimization: Distinct-value if-then-else chains treated differently than switch statements
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> IIRC there was some work turning if-then-else chains into switches (and
> possibly back to a tree)
Currently we only do switch -> balanced decision tree (read series of
if-then-else statements). Well definitely a potentially enhancement, question
is whether it worth doing that..
>From gcc-bugs-return-620519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:19:32 2018
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Subject: [Bug tree-optimization/87925] Missed optimization: Distinct-value if-then-else chains treated differently than switch statements
Date: Thu, 08 Nov 2018 09:19:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eyal Rozenberg from comment #0)
> Have a look at this GodBolt example: https://gcc.godbolt.org/z/zR03rA
>
> On one hand, we have:
>
> void foo(int i) {
> switch (i) {
> case 1: boo<1>(); break;
> case 2: boo<2>(); break;
> case 3: boo<3>(); break;
> case 4: boo<4>(); break;
> // etc. etc.
> }
> }
>
> on the other hand we have the same, but using an if-then-else chain:
>
> void bar(int i) {
> if (i == 1) boo<1>();
> else if (i == 2) boo<2>();
> else if (i == 3) boo<3>();
> else if (i == 4) boo<4>();
> // etc. etc.
> }
>
> The switch statement gets a jump table; the if-then-else chain - does not.
> At the link, there are 20 cases; g++ starts using a jump table with 4 switch
> values.
Agree with that, but I would say that when having a lot of cases, switch is
more
natural constructor. The code looks nicer ;)
>
> This is not just a matter of programmers needing to remember to prefer
> switch statements (which it's better not to require of them), but rather
> that if-then-else chains are sometimes generated by expansion of templated
> code, e.g. this example for checking for membership in a set of values (=
> all values of an enum):
>
> https://stackoverflow.com/a/53191264/1593077
This is not problem because it's a const expression that is evaluate in C++
front-end.
Thus you don't get any penalty.
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Subject: [Bug tree-optimization/87931] [9 Regression] ICE in vectorizable_reduction, at tree-vect-loop.c:6193 since r265876
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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> ---
Mine.
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Subject: [Bug c++/87934] [8/9 regression] struct with NSDMI of enum makes initialization a non-constant expression
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-08
Known to work| |7.3.1
Target Milestone|--- |8.3
Summary|[8 regression] struct with |[8/9 regression] struct
|NSDMI of enum makes |with NSDMI of enum makes
|initialization a |initialization a
|non-constant expression |non-constant expression
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. It passes with -std=c++11.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |documentation
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
They are generated from texinfo install.texi sources so that's probably
"intended" or a texinfo bug?
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Subject: [Bug web/87933] Bad headers and titles for:
Date: Thu, 08 Nov 2018 09:33:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Hm, then it looks title after ':' is stripped:
$ grep 'Installing GCC: ' gcc/doc/install.texi
@settitle Installing GCC: Configuration
@settitle Installing GCC: Building
@settitle Installing GCC: Testing
@settitle Installing GCC: Final installation
@settitle Installing GCC: Binaries
@settitle Installing GCC: Old documentation
@settitle Installing GCC: GNU Free Documentation License
@chapter Installing GCC: Configuration
@cindex Installing GCC: Configuration
@cindex Installing GCC: Building
@chapter Installing GCC: Testing
@cindex Installing GCC: Testing
@chapter Installing GCC: Final installation
@chapter Installing GCC: Binaries
@cindex Installing GCC: Binaries
>From gcc-bugs-return-620524-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:37:11 2018
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Subject: [Bug tree-optimization/87925] Missed optimization: Distinct-value if-then-else chains treated differently than switch statements
Date: Thu, 08 Nov 2018 09:37:00 -0000
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--- Comment #5 from Eyal Rozenberg <eyalroz at technion dot ac.il> ---
(In reply to Martin Liška from comment #3)
> Currently we only do switch -> balanced decision tree (read series of
> if-then-else statements). Well definitely a potentially enhancement,
> question is whether it worth doing that..
That is a question for another bug. I'm just saying that these two cases (or
some expansion thereof, e.g. with some fallthrough on the case side, or with
several distinct values in each if statement) should be treated the same. i.e.
whatever optimizations are considered for one of them should be considered for
the other.
(In reply to Martin Liška from comment #4)
> This is not problem because it's a const expression that is evaluate in C++
> front-end. Thus you don't get any penalty.
The specific use example at the link is a static_assert, but the in() function
there works with runtime values as well. So - not just compile-time
computation. Another example - un-type-erasure dispatches, which may go into
tight loops: https://stackoverflow.com/a/38924396/1593077
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Subject: [Bug tree-optimization/87925] [missed-optimization] Distinct-value if-then-else chains treated differently than switch statements
Date: Thu, 08 Nov 2018 09:43:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eyal Rozenberg from comment #5)
> (In reply to Martin Liška from comment #3)
> > Currently we only do switch -> balanced decision tree (read series of
> > if-then-else statements). Well definitely a potentially enhancement,
> > question is whether it worth doing that..
>
> That is a question for another bug. I'm just saying that these two cases (or
> some expansion thereof, e.g. with some fallthrough on the case side, or with
> several distinct values in each if statement) should be treated the same.
> i.e. whatever optimizations are considered for one of them should be
> considered for the other.
Sure, agree with that.
>
> (In reply to Martin Liška from comment #4)
> > This is not problem because it's a const expression that is evaluate in C++
> > front-end. Thus you don't get any penalty.
>
> The specific use example at the link is a static_assert, but the in()
> function there works with runtime values as well. So - not just compile-time
> computation. Another example - un-type-erasure dispatches, which may go into
> tight loops: https://stackoverflow.com/a/38924396/1593077
Indeed.
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Subject: [Bug web/87933] Bad headers and titles for:
Date: Thu, 08 Nov 2018 09:49:00 -0000
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--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
The first @settitle wins.
$ grep @settitle gcc/doc/install.texi
@settitle Installing GCC
@settitle Installing GCC
@settitle Host/Target specific installation notes for GCC
@settitle Prerequisites for GCC
@settitle Downloading GCC
@settitle Installing GCC: Configuration
@settitle Installing GCC: Building
@settitle Installing GCC: Testing
@settitle Installing GCC: Final installation
@settitle Installing GCC: Binaries
@settitle Installing GCC: Old documentation
@settitle Installing GCC: GNU Free Documentation License
>From gcc-bugs-return-620527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:53:21 2018
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Subject: [Bug web/87933] Bad headers and titles for:
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-11-08
Ever confirmed|0 |1
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Sure, but it looks conditional:
@c Specify title for specific html page
@ifset indexhtml
@settitle Installing GCC
@end ifset
@ifset specifichtml
@settitle Host/Target specific installation notes for GCC
@end ifset
@ifset prerequisiteshtml
@settitle Prerequisites for GCC
@end ifset
@ifset downloadhtml
@settitle Downloading GCC
@end ifset
@ifset configurehtml
@settitle Installing GCC: Configuration
@end ifset
@ifset buildhtml
@settitle Installing GCC: Building
@end ifset
@ifset testhtml
@settitle Installing GCC: Testing
@end ifset
@ifset finalinstallhtml
@settitle Installing GCC: Final installation
@end ifset
@ifset binarieshtml
@settitle Installing GCC: Binaries
@end ifset
@ifset oldhtml
@settitle Installing GCC: Old documentation
@end ifset
@ifset gfdlhtml
@settitle Installing GCC: GNU Free Documentation License
@end ifset
Issue is that I don't see any recent change in git log -p and I know it used to
be right.
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Subject: [Bug tree-optimization/87917] ICE in initialize_matrix_A at gcc/tree-data-ref.c:3150
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What |Removed |Added
----------------------------------------------------------------------------
CC| |sebpop at gmail dot com
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I get:
during GIMPLE pass: ldist
pr34635.c: In function ‘foo’:
pr34635.c:4:6: internal compiler error: tree check: expected integer_cst, have
polynomial_chrec in int_cst_value, at tree.c:11188
4 | void foo(int x[])
| ^~~
0x1397ffc tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/tmp/trunk/gcc/tree.c:9371
0x83e3a7 tree_int_cst_elt_check(tree_node const*, int, char const*, int, char
const*)
/tmp/trunk/gcc/tree.h:3307
0x13a0e5b int_cst_value(tree_node const*)
/tmp/trunk/gcc/tree.c:11188
#11 0x00000000010cf399 in get_data_dependence (rdg=0x2816ba0, a=0x2817830,
b=0x28170c0) at /tmp/trunk/gcc/tree-loop-distribution.c:1188
1188 compute_affine_dependence (ddr, loop_nest[0]);
(gdb) l
1183 ent.b = b;
1184 slot = ddrs_table->find_slot (&ent, INSERT);
1185 if (*slot == NULL)
1186 {
1187 ddr = initialize_data_dependence_relation (a, b, loop_nest);
1188 compute_affine_dependence (ddr, loop_nest[0]);
1189 *slot = ddr;
1190 }
(gdb) p debug_data_reference (a)
#(Data Ref:
# bb: 3
# stmt: _8 = *_4;
# ref: *_4;
# base_object: *x_22(D);
# Access function 0: {0B, +, {0, +, 4}_1}_2
#)
$6 = void
(gdb) p debug_data_reference (b)
#(Data Ref:
# bb: 3
# stmt: *_7 = _8;
# ref: *_7;
# base_object: *x_22(D);
# Access function 0: {0B, +, 4}_1
#)
so we have an "invariant" access and a variant one.
I think
else if (evolution_function_is_affine_multivariate_p (chrec_a,
loop_nest->num)
&& !chrec_contains_symbols (chrec_a)
&& evolution_function_is_affine_multivariate_p (chrec_b,
loop_nest->num)
&& !chrec_contains_symbols (chrec_b))
{
/* testsuite/.../ssa-chrec-35.c
{0, +, 1}_2 vs. {0, +, 1}_3
the overlapping elements are respectively located at iterations:
{0, +, 1}_x and {0, +, 1}_x,
in other words, we have the equality:
{0, +, 1}_2 ({0, +, 1}_x) = {0, +, 1}_3 ({0, +, 1}_x)
Other examples:
{{0, +, 1}_1, +, 2}_2 ({0, +, 1}_x, {0, +, 1}_y) =
{0, +, 1}_1 ({{0, +, 1}_x, +, 2}_y)
{{0, +, 2}_1, +, 3}_2 ({0, +, 1}_y, {0, +, 1}_x) =
{{0, +, 3}_1, +, 2}_2 ({0, +, 1}_x, {0, +, 1}_y)
*/
analyze_subscript_affine_affine (chrec_a, chrec_b,
overlaps_a, overlaps_b, last_conflicts);
is not properly guarded. evolution_function_is_affine_multivariate_p
lets this through via
bool
evolution_function_is_affine_multivariate_p (const_tree chrec, int loopnum)
{
if (chrec == NULL_TREE)
return false;
switch (TREE_CODE (chrec))
{
case POLYNOMIAL_CHREC:
if (evolution_function_is_invariant_rec_p (CHREC_LEFT (chrec), loopnum))
{
if (evolution_function_is_invariant_rec_p (CHREC_RIGHT (chrec),
loopnum))
return true;
else
{
if (TREE_CODE (CHREC_RIGHT (chrec)) == POLYNOMIAL_CHREC
&& CHREC_VARIABLE (CHREC_RIGHT (chrec))
!= CHREC_VARIABLE (chrec)
&& evolution_function_is_affine_multivariate_p
(CHREC_RIGHT (chrec), loopnum))
but as we are interested in loopnum == 1 for {0, +, {0, +, 4}_1}_2
we have to exclude the case where CHREC_RIGHT variates in it.
Whatever exactly a affine multivariate is...
Sebastian - can you say if
evolution_function_is_affine_multivariate_p ({0, +, {0, +, 4}_1}_2, 1)
should really return true?
>From gcc-bugs-return-620529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 09:58:00 2018
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--- Comment #5 from Andreas Schwab <schwab@linux-m68k.org> ---
Nope, the first one is unconditional.
>From gcc-bugs-return-620530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:01:13 2018
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Subject: [Bug web/87933] Bad headers and titles for:
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--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
Most like this is a texinfo 4 vs 5+ difference.
>From gcc-bugs-return-620531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:01:24 2018
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Subject: [Bug middle-end/50481] builtin to reverse the bit order
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--- Comment #4 from krux <hoganmeier at gmail dot com> ---
+1
The builtins already produce better code than a generic bitreverse
implementation:
https://godbolt.org/z/Um2Tit
But using special hardware instructions automatically is even more important
imho.
>From gcc-bugs-return-620532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:02:49 2018
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Subject: [Bug web/87933] Bad headers and titles for:
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Andreas Schwab from comment #5)
> Nope, the first one is unconditional.
You're right:
...
define = indexhtml
/home/marxin/Programming/gcc/gcc/doc/install.texi:14: warning: multiple
@settitle
define = specifichtml
/home/marxin/Programming/gcc/gcc/doc/install.texi:17: warning: multiple
@settitle
...
>From gcc-bugs-return-620533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:05:50 2018
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Subject: [Bug web/87933] Bad headers and titles for:
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Using:
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index be9b07b5d23..b82594bd28e 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -2,7 +2,6 @@
@c @ifnothtml
@c %**start of header
@setfilename gccinstall.info
-@settitle Installing GCC
@setchapternewpage odd
@c %**end of header
@c @end ifnothtml
fixes the problem with HTML pages.
Btw. what does it mean:
\input texinfo.tex @c -*-texinfo-*-
@c @ifnothtml <----- this
@c %**start of header
@setfilename gccinstall.info
@settitle Installing GCC
@setchapternewpage odd
@c %**end of header
@c @end ifnothtml
?
>From gcc-bugs-return-620534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:16:03 2018
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Subject: [Bug c++/87935] New: [9 regression] new failures on arm since r265788
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Bug ID: 87935
Summary: [9 regression] new failures on arm since r265788
Product: gcc
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Hi Jason,
Since r265788, I've noticed regressions on arm targets:
FAIL: g++.dg/cpp0x/constexpr-static.C -std=gnu++14 scan-assembler-not
static_initialization
FAIL: g++.dg/cpp0x/constexpr-static.C -std=gnu++17 scan-assembler-not
static_initialization
FAIL: g++.dg/cpp0x/constexpr-static12.C -std=c++14 scan-assembler-not
_ZNSt10unique_ptrC1Ei
FAIL: g++.dg/cpp0x/constexpr-static12.C -std=c++17 scan-assembler-not
_ZNSt10unique_ptrC1Ei
FAIL: g++.dg/cpp0x/constexpr-static3.C -std=gnu++14 scan-assembler-not
static_initialization
FAIL: g++.dg/cpp0x/constexpr-static3.C -std=gnu++17 scan-assembler-not
static_initialization
FAIL: g++.dg/cpp0x/implicit13.C -std=c++14 scan-assembler-not _ZN1BC1Ev
FAIL: g++.dg/cpp0x/implicit13.C -std=c++17 scan-assembler-not _ZN1BC1Ev
FAIL: g++.dg/cpp0x/pr83734.C -std=gnu++14 (test for excess errors)
FAIL: g++.dg/cpp0x/pr83734.C -std=gnu++17 (test for excess errors)
FAIL: g++.dg/cpp1y/constexpr-empty3.C -std=c++14 scan-assembler-not
static_init
FAIL: g++.dg/cpp1y/constexpr-empty3.C -std=c++17 scan-assembler-not
static_init
>From gcc-bugs-return-620535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:28:34 2018
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Subject: [Bug c++/87935] [9 regression] new failures on arm since r265788
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Version|6.4.1 |9.0
Target Milestone|--- |9.0
>From gcc-bugs-return-620536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:32:34 2018
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Subject: [Bug target/87928] [7/8/9 Regression] ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Martin Liška from comment #0)
> Following causes ICE:
>
> $ gcc
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/aggregate-ret4.c
> -mabi=ms -O1 -mstackrealign
> during RTL pass: pro_and_epilogue
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/aggregate-ret4.c:
> In function ‘bar’:
> /home/marxin/Programming/gcc/gcc/testsuite/gcc.target/i386/aggregate-ret4.c:
> 24:1: internal compiler error: in ix86_compute_frame_layout, at
> config/i386/i386.c:11161
> 24 | }
> | ^
> 0x73ba80 ix86_compute_frame_layout
> /home/marxin/Programming/gcc/gcc/config/i386/i386.c:11161
> 0x111ef6f ix86_finalize_stack_frame_flags
> /home/marxin/Programming/gcc/gcc/config/i386/i386.c:12925
> 0x11255e4 ix86_expand_prologue()
> /home/marxin/Programming/gcc/gcc/config/i386/i386.c:13035
> 0x145df8a gen_prologue()
> /home/marxin/Programming/gcc/gcc/config/i386/i386.md:12984
> 0x1107728 target_gen_prologue
> /home/marxin/Programming/gcc/gcc/config/i386/i386.md:18928
> 0xab61c1 make_prologue_seq
> /home/marxin/Programming/gcc/gcc/function.c:5713
> 0xab6367 thread_prologue_and_epilogue_insns()
> /home/marxin/Programming/gcc/gcc/function.c:5830
> 0xab6a96 rest_of_handle_thread_prologue_and_epilogue
> /home/marxin/Programming/gcc/gcc/function.c:6321
> 0xab6a96 execute
> /home/marxin/Programming/gcc/gcc/function.c:6363
This happens in i386.c:
--cut here--
/* 64-bit MS ABI seem to require stack alignment to be always 16,
except for function prologues, leaf functions and when the defult
incoming stack boundary is overriden at command line or via
force_align_arg_pointer attribute. */
if ((TARGET_64BIT_MS_ABI && crtl->preferred_stack_boundary < 128)
&& (!crtl->is_leaf || cfun->calls_alloca != 0
|| ix86_current_function_calls_tls_descriptor
|| ix86_incoming_stack_boundary < 128))
{
crtl->preferred_stack_boundary = 128;
crtl->stack_alignment_needed = 128;
}
stack_alignment_needed = crtl->stack_alignment_needed / BITS_PER_UNIT;
preferred_alignment = crtl->preferred_stack_boundary / BITS_PER_UNIT;
gcc_assert (!size || stack_alignment_needed);
gcc_assert (preferred_alignment >= STACK_BOUNDARY / BITS_PER_UNIT);
gcc_assert (preferred_alignment <= stack_alignment_needed);
--cut here--
Where TARGET_64BIT_MS_ABI gets defined as:
#define TARGET_64BIT_MS_ABI (TARGET_64BIT && ix86_cfun_abi () == MS_ABI)
and STACK_BOUNDARY:
#define STACK_BOUNDARY \
(TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD)
Please note that the former definition depends on ix86_cfun_abi, which depends
on __attribute__(([sysv_abi|ms_abi])), while the later depends on ix86_abi
global variable. In the testcase, ix86_cfun_abi () returns SYSV_ABI due to
function __attribute__ override, while ix86_abi returns MS_ABI.
The following patch redefines STACK_BOUNDARY to:
#define STACK_BOUNDARY \
- (TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD)
+ (TARGET_64BIT && ix86_cfun_abi () == MS_ABI ? 128 : BITS_PER_WORD)
so, STACK_BOUNDARY now also depends on function __attribute__.
The patch also removes unneeded redefinition of STACK_BOUNDARY from cygming.h.
--cut here--
diff --git a/gcc/config/i386/cygming.h b/gcc/config/i386/cygming.h
index d7c7dd7057bf..0a3c9a0dd401 100644
--- a/gcc/config/i386/cygming.h
+++ b/gcc/config/i386/cygming.h
@@ -268,9 +268,6 @@ do { \
bytes in one go. */
#define CHECK_STACK_LIMIT 4000
-#undef STACK_BOUNDARY
-#define STACK_BOUNDARY (TARGET_64BIT && ix86_abi == MS_ABI ? 128 :
BITS_PER_WORD)
-
/* By default, target has a 80387, uses IEEE compatible arithmetic,
returns float values in the 387 and needs stack probes.
We also align doubles to 64-bits for MSVC default compatibility. */
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 58caab2bb55b..a85b43134092 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -808,7 +808,7 @@ extern const char *host_detect_local_cpu (int argc, const
char **argv);
/* Boundary (in *bits*) on which stack pointer should be aligned. */
#define STACK_BOUNDARY \
- (TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD)
+ (TARGET_64BIT && ix86_cfun_abi () == MS_ABI ? 128 : BITS_PER_WORD)
/* Stack boundary of the main function guaranteed by OS. */
#define MAIN_STACK_BOUNDARY (TARGET_64BIT ? 128 : 32)
--cut here--
Adding Kai to CC. The patch also needs to be tested on Windows targets.
>From gcc-bugs-return-620537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:49:00 2018
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Subject: [Bug tree-optimization/87929] ICE in verify_gimple failed
Date: Thu, 08 Nov 2018 10:48:00 -0000
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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 on trunk.
>From gcc-bugs-return-620538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 10:49:01 2018
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Subject: [Bug tree-optimization/87929] ICE in verify_gimple failed
Date: Thu, 08 Nov 2018 10:49:00 -0000
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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 on trunk.
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Nov 8 10:47:59 2018
New Revision: 265912
URL: https://gcc.gnu.org/viewcvs?rev=265912&root=gcc&view=rev
Log:
2018-11-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/87929
* tree-complex.c (expand_complex_comparison): Clean EH.
* gcc.dg/pr87929.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr87929.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-complex.c
>From gcc-bugs-return-620539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 11:02:05 2018
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Subject: [Bug rtl-optimization/86438] [8/9 Regression] wrong code at -Os
Date: Thu, 08 Nov 2018 11:02:00 -0000
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--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00533.html
>From gcc-bugs-return-620540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 11:17:07 2018
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/87936] New: gnatlink fails with -pie
Date: Thu, 08 Nov 2018 11:17:00 -0000
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Bug ID: 87936
Summary: gnatlink fails with -pie
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
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Consider the following testcase:
...
$ cat hello.adb
with Ada.Text_IO;
procedure Hello is
begin
Ada.Text_IO.Put_Line("Hello, world!");
end Hello;
...
It compiles without problems:
...
$ rm -f hello.ali hello.o hello ; gnatmake hello.adb
gcc -c hello.adb
gnatbind -x hello.ali
gnatlink hello.ali
...
and works fine:
...
delia:~ # ./hello
Hello, world!
...
However, when we try to compile with -fPIE -pie, we get:
...
$ rm -f hello.ali hello.o hello ; gnatmake -fPIE hello.adb -largs -pie
gcc -c -fPIE hello.adb
gnatbind -x hello.ali
gnatlink hello.ali -fPIE -pie
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld:
/usr/lib64/gcc/x86_64-suse-linux/8/adalib/libgnat.a(a-contai.o): relocation
R_X86_64_32 against symbol `ada__containers__capacity_error' can not be used
when making a PIE object; recompile with -fPIC
...
/usr/lib64/gcc/x86_64-suse-linux/8/../../../../x86_64-suse-linux/bin/ld: final
link failed: nonrepresentable section on output
collect2: error: ld returned 1 exit status
gnatlink: error when calling /usr/bin/gcc
gnatmake: *** link failed.
...
The problem is that libgnat.a is picked up instead of libgnat_pic.a, so a
workaround is to add -lgnat_pic:
...
$ rm -f hello.ali hello.o hello ; gnatmake -fPIE hello.adb -largs -pie
-lgnat_pic
$ ./hello
Hello, world!
...
AFAIU, gnatlink should include libgnat_pic.a instead of libgnat.a when passed
the -pie option.
>From gcc-bugs-return-620541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 11:21:44 2018
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From: "tomastrnka at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87937] New: [8/9 Regression] LHS reallocation broken inside "select type"
Date: Thu, 08 Nov 2018 11:21:00 -0000
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Bug ID: 87937
Summary: [8/9 Regression] LHS reallocation broken inside
"select type"
Product: gcc
Version: 8.2.1
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The fix for pr85954 broke LHS reallocation inside "select type" blocks. The
following program segfaults with current 8.2 branch (including the system
compiler 8.2.1 20181011 on my Fedora 29):
program lhsalloc
type, abstract :: A
real, allocatable :: x(:)
end type
type, extends(A) :: B
end type
class(A), allocatable :: t
real :: y(4)
y = 1
allocate(B::t)
select type (t)
type is (B)
t%x = y
end select
write(*,*) allocated(t%x)
end program
The code to allocate t%x is simply never generated.
Partially reverting the offending change by removing these two lines from
gfc_is_reallocatable_lhs fixes the issue:
if (sym->attr.associate_var)
return false;
Although pr87625 sounds related, its fix doesn't help here because the
associate_var check comes earlier.
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Subject: [Bug c++/87935] [9 regression] new failures on arm since r265788
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--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
It also causes:
FAIL: g++.dg/cpp0x/pr83734.C -std=gnu++14 (internal compiler error)
FAIL: g++.dg/cpp0x/pr83734.C -std=gnu++17 (internal compiler error)
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Subject: [Bug ada/87938] New: libgnat.a not compiled with -fno-PIC
Date: Thu, 08 Nov 2018 11:38:00 -0000
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Bug ID: 87938
Summary: libgnat.a not compiled with -fno-PIC
Product: gcc
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We build two versions of libgnat.a: libgnat.a and libgnat_pic.a.
The libgnat_pic.a is compiled with -fpic (more precisely, with
PICFLAG_FOR_TARGET).
But libgnat.a is compiled with whatever the default is, so if gcc defaults to
-pie -fPIE, then libgnat.a is compiled with -fPIE. My guess is that we want to
build libgnat.a with -fno-PIE/-fno-pie.
>From gcc-bugs-return-620544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 11:56:28 2018
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Subject: [Bug fortran/87625] [OOP] (re)allocate on assignment fails for polymorphic array
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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> ---
This seems fixed on trunk (9.0). Will r265283 be back ported?
>From gcc-bugs-return-620545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 11:57:10 2018
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Subject: [Bug fortran/87937] [8/9 Regression] LHS reallocation broken inside "select type"
Date: Thu, 08 Nov 2018 11:57:00 -0000
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> The code to allocate t%x is simply never generated.
How do you see that?
WORKSFORME on darwin.
>From gcc-bugs-return-620546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 11:57:41 2018
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Subject: [Bug fortran/87937] [8/9 Regression] LHS reallocation broken inside "select type"
Date: Thu, 08 Nov 2018 11:57:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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>From gcc-bugs-return-620547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 12:16:38 2018
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Subject: [Bug fortran/87937] [8/9 Regression] LHS reallocation broken inside "select type"
Date: Thu, 08 Nov 2018 12:16:00 -0000
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--- Comment #2 from Tomáš Trnka <tomastrnka at gmx dot com> ---
(In reply to Dominique d'Humieres from comment #1)
> > The code to allocate t%x is simply never generated.
>
> How do you see that?
>
> WORKSFORME on darwin.
Weird, I wouldn't expect the frontend to behave in a platform-specific way.
What version are you using to test? (8.2.0 is not affected. I haven't actually
tried it with 9, but AFAICS the code is the same.)
Running "gfortran -fdump-tree-original lhsalloc.f90" with and without the
associate_var check produces the two attached files, with the allocation
obviously missing from the bad one.
>From gcc-bugs-return-620548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 12:24:48 2018
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Subject: [Bug fortran/87937] [8/9 Regression] LHS reallocation broken inside "select type"
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--- Comment #3 from Tomáš Trnka <tomastrnka at gmx dot com> ---
Created attachment 44972
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44972&action=edit
Original tree dump from 8.2.1 20181011
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Subject: [Bug fortran/87937] [8/9 Regression] LHS reallocation broken inside "select type"
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--- Comment #4 from Tomáš Trnka <tomastrnka at gmx dot com> ---
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Original tree dump after removing the offending check
>From gcc-bugs-return-620550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 12:57:46 2018
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From: "weeks at iastate dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87939] New: Support STAT= and ERRMSG= specifiers to CRITICAL and TEAM statements
Date: Thu, 08 Nov 2018 12:57:00 -0000
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Bug ID: 87939
Summary: Support STAT= and ERRMSG= specifiers to CRITICAL and
TEAM statements
Product: gcc
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gcc/fortran/match.c appears to implement support for that STAT= and ERRMSG=
specifiers in LOCK, UNLOCK, SYNC ALL, SYNC IMAGES, and SYNC MEMORY statements
(as standardized by Fortran 2008), in addition to EVENT POST and EVENT WAIT
from the forthcoming Fortran 2018 standard.
gfortran currently lacks support for STAT= and ERRMSG= specifiers in several
statements where they will be allowed in Fortran 2018: FORM TEAM, CHANGE TEAM,
SYNC TEAM, END TEAM, CRITICAL, and END CRITICAL. It would be beneficial to add
these to gfortran to allow more comprehensive support for failed images in
OpenCoarrays.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug ada/87936] gnatlink fails with -pie
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I suppose it works when using -fPIC/-pic?
>From gcc-bugs-return-620553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 13:31:00 2018
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/87936] gnatlink fails with -pie
Date: Thu, 08 Nov 2018 13:31:00 -0000
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> I suppose it works when using -fPIC/-pic?
Using -fPIC:
...
$ rm -f hello.ali hello.o hello ; gnatmake -fPIC hello.adb
gcc -c -fPIC hello.adb
gnatbind -x hello.ali
gnatlink hello.ali -fPIC
$ ./hello
Hello, world!
...
using -fpic:
...
$ rm -f hello.ali hello.o hello ; gnatmake -fpic hello.adb
gcc -c -fpic hello.adb
gnatbind -x hello.ali
gnatlink hello.ali -fpic
$ ./hello
Hello, world!
...
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Subject: [Bug middle-end/87899] [9 regression]r264897 cause mis-compiled native arm-linux-gnueabihf toolchain
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--- Comment #5 from Renlin Li <renlin at gcc dot gnu.org> ---
Created attachment 44974
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44974&action=edit
IRA dump
The code you want to check is the following in ira pass:
insn 10905: r1 = r2040
insn 208: use and update r1 with pre_modify
insn 191: use pseudo r2040
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Subject: [Bug middle-end/87899] [9 regression]r264897 cause mis-compiled native arm-linux-gnueabihf toolchain
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--- Comment #6 from Renlin Li <renlin at gcc dot gnu.org> ---
Created attachment 44975
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IRA dump
>From gcc-bugs-return-620556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 13:43:49 2018
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Subject: [Bug gcov-profile/87442] Add options to filter files we want to instrument for code coverage
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87442
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> Few things:
> i) I use ';' as regex separator (to avoid issues under windows with C:\...)
> ii) if exclude is empty and filename is matching any of the regexes in
> filter then instrument it.
> iii) if filter is empty and filename is not matching any of the regexes in
> exclude then instrument it.
> iv) if both are not empty and filename is matching any of the regexes in
> filter AND is not matching any of the regexes in exclude then instrument it.
>
> Few examples:
> i) exclude="^/usr/include/;^/usr/local/include/" => a file is instrumented
> if and only if it isn't in /usr/include/ nor in /usr/local/include/
> ii) filter="^/home/foo/dev/.*\.cpp;^/home/foo/ved/.*\.cpp" => a file is
> instrumented if and only if it's a cpp file somewhere under /home/foo/dev/
> or /home/foo/ved/
> iii) exclude="^/usr/include/.*$" and filter="^/usr/.*$" => a file is
> instrumented if and only if it's somewhere under /usr/ but not under
> /usr/include
>
> My patch for llvm is here:
> https://reviews.llvm.org/D52033
>
> If you see something wrong or have idea to improve, please ping me.
Looks good to me, I've just sent patch candidate:
https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00568.html
>From gcc-bugs-return-620557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 13:44:05 2018
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Subject: [Bug tree-optimization/87940] New: [9 Regression] FAIL: gcc.dg/warn-strlen-no-nul.c
Date: Thu, 08 Nov 2018 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87940
Bug ID: 87940
Summary: [9 Regression] FAIL: gcc.dg/warn-strlen-no-nul.c
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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CC: edlinger at gcc dot gnu.org
Target Milestone: ---
On i686, r265778 caused:
/export/gnu/import/git/gcc-test-ia32/src-trunk/gcc/testsuite/gcc.dg/warn-strlen-no-nul.c:56:1:
internal compiler error: verify_gimple failed^M
0x8922dc4 verify_gimple_in_seq(gimple*)^M
../../src-trunk/gcc/tree-cfg.c:5082^M
0x86899d7 gimplify_body(tree_node*, bool)^M
../../src-trunk/gcc/gimplify.c:12859^M
0x8689b8b gimplify_function_tree(tree_node*)^M
../../src-trunk/gcc/gimplify.c:12949^M
0x84f7690 cgraph_node::analyze()^M
../../src-trunk/gcc/cgraphunit.c:667^M
0x84fa1d8 analyze_functions^M
../../src-trunk/gcc/cgraphunit.c:1126^M
0x84fadd3 symbol_table::finalize_compilation_unit()^M
../../src-trunk/gcc/cgraphunit.c:2833^M
Please submit a full bug report,^M
with preprocessed source if appropriate.^M
Please include the complete backtrace with any bug report.^M
See <https://gcc.gnu.org/bugs/> for instructions.^M
compiler exited with status 1
FAIL: gcc.dg/warn-strlen-no-nul.c (internal compiler error)
>From gcc-bugs-return-620558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 13:57:35 2018
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Subject: [Bug tree-optimization/87940] [9 Regression] FAIL: gcc.dg/warn-strlen-no-nul.c
Date: Thu, 08 Nov 2018 13:57:00 -0000
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Bernd Edlinger <edlinger at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-11-08
Assignee|unassigned at gcc dot gnu.org |edlinger at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
proposed patch: https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00325.html
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87941] New: by_pieces infra does not use movmisalign optab
Date: Thu, 08 Nov 2018 14:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87941
Bug ID: 87941
Summary: by_pieces infra does not use movmisalign optab
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
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by_pieces code uses only mov_optab, never checking movmisalign_optab, so on
STRICT_ALIGNMENT targets such as arm it does not use available misaligned
load/store patterns. It results in suboptimal code for e.g.
void f(char *c)
{
__builtin_memcpy(c, "foo", 4);
}
where with -O2 -march=armv6t2 gcc emits
f:
movw r3, #:lower16:.LANCHOR0
mov r2, r0
movt r3, #:upper16:.LANCHOR0
ldr r0, [r3]
str r0, [r2] @ unaligned
bx lr
.size f, .-f
.section .rodata
.align 2
.set .LANCHOR0,. + 0
.LC0:
.ascii "foo\000"
while optimal code is emitted for the equivalent
void f(char *c)
{
int t;
__builtin_memcpy(&t, "foo", 4);
__builtin_memcpy(c, &t, 4);
}
f:
movw r3, #28518
movt r3, 111
str r3, [r0] @ unaligned
bx lr
.size f, .-f
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Subject: [Bug c/87942] New: every int seems to be unaligned in packed structure
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87942
Bug ID: 87942
Summary: every int seems to be unaligned in packed structure
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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testcode:
#pragma pack(1)
typedef struct
{
volatile int cmd;
} test_t;
#pragma pack(0)
test_t test;
int read32()
{
test.cmd = 11;
return 0;
}
host: win/linux x86_64
target: arm, STM32L471
gcc versions: 4.8.3 (ok), bugs in: 5.4.1, 6.3.0, 7.2.1, 8.2.0
---
since version gcc version>=5 there seems to be a bug if pragma pack(1) is used.
gcc thinks test.cmd is missaligned, but it isn't.
The code is ok in gcc version 4. The code with AND without pack(1) should be
identical in this example.
The inner code should be something like this:
mov r2, #11
str r2, [r3, #0]
but with pack(1):
mov r1, #11
mov r2, #0
ldr r3, .L3
ldrb r0, [r3] @ zero_extendqisi2
strb r1, [r3]
ldrb r1, [r3, #1] @ zero_extendqisi2
strb r2, [r3, #1]
ldrb r1, [r3, #2] @ zero_extendqisi2
strb r2, [r3, #2]
mov r0, r2
ldrb r1, [r3, #3] @ zero_extendqisi2
strb r2, [r3, #3]
The problem is that the variable in this case is a special function register of
the chip and have to be accessed in 32bit only. Every 8bit access to this
register crashes the system.
It would be nice, if there is a compiler switch, which leeds into an error, if
a volatile variable can't be read/write in one single access.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87942] every int seems to be unaligned in packed structure
Date: Thu, 08 Nov 2018 14:54:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Johannes Vetter from comment #0)
> since version gcc version>=5 there seems to be a bug if pragma pack(1) is
> used. gcc thinks test.cmd is missaligned, but it isn't.
>
> The code is ok in gcc version 4. The code with AND without pack(1) should be
> identical in this example.
No, it was a bug in version 4: since 'test' does not have an initializer, it
ends up as a common definition, which could be preempted at link time with a
normal definition with less-than-int alignment. Compiling with -fno-common
leads to desired code generation, as does providing an initializer:
test_t test = { 0 };
You can also add __attribute__((aligned(4))) on the struct type to make it
aligned (while still packed).
> It would be nice, if there is a compiler switch, which leeds into an error,
> if a volatile variable can't be read/write in one single access.
I think this makes sense.
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Subject: [Bug middle-end/87916] [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
Date: Thu, 08 Nov 2018 14:58:00 -0000
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Nov 8 14:57:47 2018
New Revision: 265916
URL: https://gcc.gnu.org/viewcvs?rev=265916&root=gcc&view=rev
Log:
PR middle-end/87916
* cgraphclones.c (duplicate_thunk_for_node): Also set DECL_IGNORED_P.
Added:
trunk/gcc/testsuite/g++.dg/other/pr87916.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cgraphclones.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/87916] [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
Date: Thu, 08 Nov 2018 15:05:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Thanks for the reduced testcase.
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87943] New: [6.5 regression] severe regression on iso_varying_string (?)
Date: Thu, 08 Nov 2018 15:08:00 -0000
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Bug ID: 87943
Summary: [6.5 regression] severe regression on
iso_varying_string (?)
Product: gcc
Version: 6.4.1
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Reporter: juergen.reuter at desy dot de
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Created attachment 44976
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44976&action=edit
Reproducer
I put 6.4.1 as there is no option to choose 6.5.0.
This is a report on a severe regression (from our point of view) for the 6.5
(final?) version of the gfortran 6 series, so not sure whether it makes to
report. But you might close it as 'won't fix'. The attached reproducer is not
yet completely reduced, if you unpack and do 'make' it generates a dynamic
library external.Test.so (which is not really necessary) and an executable
whizard_test. Then execute this with
$./whizard_test --check models
This runs one of our unit tests, the tests models_3 and models_4 fail as the
strings for several objects have not been correctly read from file. In total,
with gfortran 6.5, 19 of 128 unit tests fail and all non-skipped functional
tests fail with segmentation faults (236 of 278). The full code is here:
http://whizard.hepforge.org/whizard-2.6.4.tar.gz
You need OCaml to run all/most tests, just to ./configure; make; make check.
I wait for feedback before I attempt to possibly reduce the reproducer.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87916] [9 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:22479 since r264943
Date: Thu, 08 Nov 2018 15:10:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #5)
> Thanks for the reduced testcase.
I thank you for the quick fix.
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Subject: [Bug c++/87934] [8/9 regression] struct with NSDMI of enum makes initialization a non-constant expression
Date: Thu, 08 Nov 2018 15:16:00 -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> ---
commit d93ee6f87d421c95c873fe09445fc77cd8624a25
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri Jun 9 22:46:51 2017 +0000
Don't fold conversion from a constant variable.
* call.c (convert_like_real): Remove "inner" parameter.
Don't replace a constant with its value.
* cp-gimplify.c (cp_fully_fold): Use cp_fold_rvalue.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@249083
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug ipa/86395] add support of -fopt-info-inline in inliner
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Thu Nov 8 15:38:30 2018
New Revision: 265920
URL: https://gcc.gnu.org/viewcvs?rev=265920&root=gcc&view=rev
Log:
ipa-inline.c/tree-inline.c: port from fprintf to dump API (PR ipa/86395)
This patch ports various fprintf calls in the inlining code to using
the dump API, using the %C format code for printing cgraph_node *.
I focussed on the dump messages that seemed most significant to
end-users; I didn't port all of the calls.
Doing so makes this information appear in -fopt-info and in
optimization records, rather than just in the dump_file.
It also changes the affected dumpfile-dumps from being unconditional
(assuming the dump_file is enabled) to being guarded by the MSG_*
status. Hence various tests with dg-final scan-*-dump directives
need to gain "-all" or "-optimized" suffixes to -fdump-ipa-inline.
The use of %C throughout also slightly changes the dump format for
several messages, e.g. changing:
Inlining void inline_me(char*) into int main(int, char**).
to:
../../src/gcc/testsuite/g++.dg/tree-ssa/inline-1.C:13:8: optimized: Inlining
void inline_me(char*)/0 into int main(int, char**)/2.
amongst other things adding "/order" suffixes to the cgraph node
names.
gcc/ChangeLog:
PR ipa/86395
* doc/invoke.texi (-fdump-ipa-): Document the "-optimized",
"-missed", "-note", and "-all" sub-options.
* ipa-inline.c (caller_growth_limits): Port from fprintf to dump
API.
(can_early_inline_edge_p): Likewise.
(want_early_inline_function_p): Likewise.
(want_inline_self_recursive_call_p): Likewise.
(recursive_inlining): Likewise.
(inline_small_functions): Likewise.
(flatten_function): Likewise.
(ipa_inline): Likewise.
(inline_always_inline_functions): Likewise.
(early_inline_small_functions): Likewise.
(early_inliner): Likewise.
* tree-inline.c (expand_call_inline): Likewise.
gcc/testsuite/ChangeLog:
PR ipa/86395
* g++.dg/ipa/devirt-12.C: Add "-all" suffix to
"-fdump-ipa-inline".
* g++.dg/ipa/imm-devirt-1.C: Add "-optimized" suffix to
"-fdump-tree-einline".
* g++.dg/tree-prof/inline_mismatch_args.C: Add "-all" suffix to
"-fdump-tree-einline".
* g++.dg/tree-ssa/inline-1.C: Add "-optimized" suffix to
"-fdump-tree-einline".
* g++.dg/tree-ssa/inline-2.C: Likewise.
* g++.dg/tree-ssa/inline-3.C: Likewise.
* g++.dg/tree-ssa/inline-4.C: New test, based on inline-1.C, but
using "-fopt-info-inline".
* gcc.dg/ipa/fopt-info-inline-1.c: New test.
* gcc.dg/ipa/inline-4.c: Add "-all" suffix to
"-fdump-ipa-inline". Add "-fopt-info-inline" and dg-optimized
directive.
* gcc.dg/ipa/inline-7.c: Add "-optimized" suffix to
"-fdump-tree-einline". Add "-fopt-info-inline" and dg-optimized
directive. Update scan-tree-dump-times to reflect /order
suffixes.
* gcc.dg/ipa/inlinehint-4.c: Update scan-tree-dump-times to
reflect /order suffixes.
* gcc.dg/plugin/dump-1.c: Add "-loop" to "-fopt-info-note" to
avoid getting extra messages from inliner.
* gcc.dg/plugin/dump-2.c: Likewise.
* gcc.dg/pr26570.c: Add dg-prune-output to ignore new
"function body not available" missed optimization messages.
* gcc.dg/pr71969-2.c: Update scan-tree-dump-times to reflect
/order suffixes.
* gcc.dg/pr71969-3.c: Likewise.
* gcc.dg/tree-ssa/inline-11.c: Add "-all" suffix to
"-fdump-tree-einline".
* gcc.dg/tree-ssa/inline-3.c: Add "-optimized" suffix to
"-fdump-tree-einline". Update scan-tree-dump-times to reflect
/order suffixes.
* gcc.dg/tree-ssa/inline-4.c: Add "-optimized" suffix to
"-fdump-tree-einline". Add "-fopt-info-inline" and dg-optimized
directive.
* gcc.dg/tree-ssa/inline-8.c: Add "-optimized" suffix to
"-fdump-tree-einline".
* gfortran.dg/pr79966.f90: Update scan-ipa-dump to reflect /order
suffixes.
Added:
trunk/gcc/testsuite/g++.dg/tree-ssa/inline-4.C
trunk/gcc/testsuite/gcc.dg/ipa/fopt-info-inline-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
trunk/gcc/ipa-inline.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/ipa/devirt-12.C
trunk/gcc/testsuite/g++.dg/ipa/imm-devirt-1.C
trunk/gcc/testsuite/g++.dg/tree-prof/inline_mismatch_args.C
trunk/gcc/testsuite/g++.dg/tree-ssa/inline-1.C
trunk/gcc/testsuite/g++.dg/tree-ssa/inline-2.C
trunk/gcc/testsuite/g++.dg/tree-ssa/inline-3.C
trunk/gcc/testsuite/gcc.dg/ipa/inline-4.c
trunk/gcc/testsuite/gcc.dg/ipa/inline-7.c
trunk/gcc/testsuite/gcc.dg/ipa/inlinehint-4.c
trunk/gcc/testsuite/gcc.dg/plugin/dump-1.c
trunk/gcc/testsuite/gcc.dg/plugin/dump-2.c
trunk/gcc/testsuite/gcc.dg/pr26570.c
trunk/gcc/testsuite/gcc.dg/pr71969-2.c
trunk/gcc/testsuite/gcc.dg/pr71969-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/inline-11.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/inline-3.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/inline-4.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/inline-8.c
trunk/gcc/testsuite/gfortran.dg/pr79966.f90
trunk/gcc/tree-inline.c
>From gcc-bugs-return-620568-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 15:40:55 2018
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Subject: [Bug tree-optimization/78969] bogus snprintf truncation warning due to missing range info
Date: Thu, 08 Nov 2018 15:40:00 -0000
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Jeremy Sheaffer <gcc at sheaffer dot ws> changed:
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----------------------------------------------------------------------------
CC| |gcc at sheaffer dot ws
--- Comment #13 from Jeremy Sheaffer <gcc at sheaffer dot ws> ---
Bug is still present in 8.2.0:
snprintf(s[i], 60, "%40s%2d %s by %2d %s", tmp,
abs(character_get_y(c[i]) - character_get_y(d->PC)),
((character_get_y(c[i]) - character_get_y(d->PC)) <= 0 ?
"North" : "South"),
abs(character_get_x(c[i]) - character_get_x(d->PC)),
((character_get_x(c[i]) - character_get_x(d->PC)) <= 0 ?
"West" : "East"));
The two integer conversion are always <= 2 digits.
>From gcc-bugs-return-620569-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 15:53:42 2018
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Subject: [Bug rtl-optimization/87902] [9 Regression] Shrink-wrapping multiple conditions
Date: Thu, 08 Nov 2018 15:53:00 -0000
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--- Comment #3 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
Judging by the following comment in lra-coalesce.c, RA doesn't do this
intentionally:
Here we coalesce only spilled pseudos. Coalescing non-spilled
pseudos (with different hard regs) might result in spilling
additional pseudos because of possible conflicts with other
non-spilled pseudos and, as a consequence, in more constraint
passes and even LRA infinite cycling. Trivial the same hard
register moves will be removed by subsequent compiler passes.
In which cases would moving copies down in prepare_shrink_wrap () make
the code worse?
>From gcc-bugs-return-620570-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 17:19:49 2018
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Subject: [Bug c/87944] New: Wrong code with LRA pushing stack local variable
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87944
Bug ID: 87944
Summary: Wrong code with LRA pushing stack local variable
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Created attachment 44977
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44977&action=edit
Dump file before reload
I see this on pdp11, I haven't found a mainline target yet that reproduces it.
The issue is on a call that passes the address of a local variable, with
arguments pushed on the stack so effectively we get a push(frame_pointer).
With frame pointer elimination, that becomes push(stack_pointer).
But that's not a legal instruction on this machine, and I created constraints
that say so. With the old reload, I see the intended result: copy SP to
another register, then push that register.
LRA instead adjusts the stack pointer by a word to make room for the argument,
then copies the stack pointer to that spot. The result is that the argument is
off by one word because it copied the SP after adjustment rather than
generating the value before. The offending pdp11 code looks like this:
add $-02,sp
mov sp,(sp)
jsr pc,_strlen
what's wanted is something like this:
mov sp,r0
mov r0,-(sp)
I've seen variations of this issue in LRA; the common thread is that it doesn't
aways account for changes in SP when calculating the SP offset for a local
variable.
I'll attach dump files that show the issue. The issue is with insn 12.
>From gcc-bugs-return-620571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 17:21:13 2018
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Subject: [Bug c/87944] Wrong code with LRA pushing stack local variable
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--- Comment #1 from pkoning at gcc dot gnu.org ---
Created attachment 44978
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44978&action=edit
Reload dump
>From gcc-bugs-return-620572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 17:22:24 2018
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Subject: [Bug c/87944] Wrong code with LRA pushing stack local variable
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--- Comment #2 from pkoning at gcc dot gnu.org ---
Created attachment 44979
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Test program source
>From gcc-bugs-return-620573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 17:33:51 2018
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Subject: [Bug middle-end/54615] unclear documentation on -fomit-frame-pointer for -O
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sandra at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #1 from sandra at gcc dot gnu.org ---
The text about the interaction between -O and -fomit-frame-pointer in the
discussion of both options has been rewritten since this issue was filed. It
looks like it agrees with the code: "Enabled by default at @option{-O} and
higher."
>From gcc-bugs-return-620574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 17:36:26 2018
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Subject: [Bug middle-end/51019] unclear documentation on -fomit-frame-pointer default for -Os and different platforms
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CC| |sandra at gcc dot gnu.org
Resolution|--- |WORKSFORME
--- Comment #2 from sandra at gcc dot gnu.org ---
Since this issue was filed, the discussion about -fomit-frame-pointer has been
rewritten so that it no longer mentions specific releases or targets. It now
says "Enabled by default at @option{-O} and higher.", which matches what the
code in opts.c does with it.
>From gcc-bugs-return-620575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 18:49:38 2018
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Subject: [Bug fortran/56423] F08/0071: Shall reject invalid Vector subscript target with Pointer assignment
Date: Thu, 08 Nov 2018 18:49:00 -0000
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G. Steinmetz <gscfq@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gscfq@t-online.de
--- Comment #2 from G. Steinmetz <gscfq@t-online.de> ---
Update, slightly simplified :
$ cat z1.f90
program p
integer, target :: x(3) = [7, 8, 9]
type t
integer, pointer :: a(:)
end type
type(t) :: z
z = t(x([2]))
print *, z%a
end
$ gfortran-9-20181104 -c z1.f90
z1.f90:7:0:
7 | z = t(x([2]))
|
internal compiler error: in gfc_conv_expr_descriptor, at
fortran/trans-array.c:7285
0x6d14c3 gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-array.c:7285
0x6f2a9b gfc_trans_subcomponent_assign
../../gcc/fortran/trans-expr.c:7485
0x6f375a gfc_trans_structure_assign(tree_node*, gfc_expr*, bool, bool)
../../gcc/fortran/trans-expr.c:7824
0x6edf0f gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7891
0x6ee14c gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8059
0x6fc779 gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10248
0x6bf54f trans_code
../../gcc/fortran/trans.c:1822
0x6e6e14 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6509
0x6740a6 translate_all_program_units
../../gcc/fortran/parse.c:6125
0x6740a6 gfc_parse_file()
../../gcc/fortran/parse.c:6328
0x6bc03f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
---
And nearby :
$ cat z2.f90
program p
integer, target :: x(3) = [7, 8, 9]
type t
integer, pointer :: a(:)
end type
type(t) :: z
z = t(x(2))
print *, z%a
end
$ gfortran-9-20181104 -c z2.f90
z2.f90:7:0:
7 | z = t(x(2))
|
internal compiler error: in gfc_conv_expr_descriptor, at
fortran/trans-array.c:7090
0x6d14eb gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-array.c:7090
0x6f2a9b gfc_trans_subcomponent_assign
../../gcc/fortran/trans-expr.c:7485
0x6f375a gfc_trans_structure_assign(tree_node*, gfc_expr*, bool, bool)
../../gcc/fortran/trans-expr.c:7824
0x6edf0f gfc_conv_structure(gfc_se*, gfc_expr*, int)
../../gcc/fortran/trans-expr.c:7891
0x6ee14c gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8059
0x6fc779 gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10248
0x6bf54f trans_code
../../gcc/fortran/trans.c:1822
0x6e6e14 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6509
0x6740a6 translate_all_program_units
../../gcc/fortran/parse.c:6125
0x6740a6 gfc_parse_file()
../../gcc/fortran/parse.c:6328
0x6bc03f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-620576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 18:51:33 2018
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Subject: [Bug fortran/87945] New: [9 Regression] ICE in var_element, at fortran/decl.c:281
Date: Thu, 08 Nov 2018 18:51:00 -0000
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Bug ID: 87945
Summary: [9 Regression] ICE in var_element, at
fortran/decl.c:281
Product: gcc
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Changed recently :
$ cat z1.f90
program p
character :: a, b
data a%len /1/
data b%kind /'b'/
end
$ gfortran-9-20181104 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb205df crash_signal
../../gcc/toplev.c:325
0x60299e var_element
../../gcc/fortran/decl.c:281
0x604ce4 top_var_list
../../gcc/fortran/decl.c:321
0x604ce4 gfc_match_data()
../../gcc/fortran/decl.c:598
0x66a3c1 match_word
../../gcc/fortran/parse.c:65
0x66db06 decode_statement
../../gcc/fortran/parse.c:468
0x66e72a next_free
../../gcc/fortran/parse.c:1234
0x66e72a next_statement
../../gcc/fortran/parse.c:1466
0x66fd3b parse_spec
../../gcc/fortran/parse.c:3858
0x672807 parse_progunit
../../gcc/fortran/parse.c:5671
0x673e89 gfc_parse_file()
../../gcc/fortran/parse.c:6211
0x6bc03f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
>From gcc-bugs-return-620577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 18:56:05 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87946] New: [7/8/9 Regression] ICE in gfc_walk_array_ref, at fortran/trans-array.c:10506
Date: Thu, 08 Nov 2018 18:56:00 -0000
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Bug ID: 87946
Summary: [7/8/9 Regression] ICE in gfc_walk_array_ref, at
fortran/trans-array.c:10506
Product: gcc
Version: 9.0
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Affects versions 7 to 9.
Compiles with "type(t), allocatable :: u(:)" instead of class...
$ cat z1.f90
module m
type t
contains
generic :: h => g
procedure, private :: g
end type
contains
function g(x, y) result(z)
class(t), intent(in) :: x
real, intent(in) :: y(:, :)
real :: z(size(y, 2))
end
end
module m2
use m
type t2
class(t), allocatable :: u(:)
end type
end
function f(x, y) result(z)
use m2
type(t2) :: x
real :: y(:, :)
real :: z(size(y, 2))
z = x%u(1)%h(y)
end
$ gfortran-6 -c z1.f90
$
$ gfortran-9-20181104 -c z1.f90
z1.f90:25:0:
25 | z = x%u(1)%h(y)
|
internal compiler error: Segmentation fault
0xb205df crash_signal
../../gcc/toplev.c:325
0x6ce11f gfc_walk_array_ref(gfc_ss*, gfc_expr*, gfc_ref*)
../../gcc/fortran/trans-array.c:10506
0x6cfda9 gfc_walk_expr(gfc_expr*)
../../gcc/fortran/trans-array.c:10886
0x6cfda9 gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-array.c:7087
0x6ffb41 gfc_conv_intrinsic_size
../../gcc/fortran/trans-intrinsic.c:7144
0x71549b gfc_conv_intrinsic_function(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-intrinsic.c:9754
0x6f9a54 gfc_conv_function_expr
../../gcc/fortran/trans-expr.c:6905
0x6ee0aa gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8039
0x6f010a gfc_apply_interface_mapping(gfc_interface_mapping*, gfc_se*,
gfc_expr*)
../../gcc/fortran/trans-expr.c:4451
0x6c5d07 gfc_set_loop_bounds_from_array_spec(gfc_interface_mapping*, gfc_se*,
gfc_array_spec*)
../../gcc/fortran/trans-array.c:932
0x6f84a5 gfc_conv_procedure_call(gfc_se*, gfc_symbol*, gfc_actual_arglist*,
gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
../../gcc/fortran/trans-expr.c:6147
0x6f9a3c gfc_conv_function_expr
../../gcc/fortran/trans-expr.c:6928
0x6ee0aa gfc_conv_expr(gfc_se*, gfc_expr*)
../../gcc/fortran/trans-expr.c:8039
0x6cf080 gfc_add_loop_ss_code
../../gcc/fortran/trans-array.c:2815
0x6cfc25 gfc_conv_loop_setup(gfc_loopinfo*, locus*)
../../gcc/fortran/trans-array.c:5129
0x6fc69b gfc_trans_assignment_1
../../gcc/fortran/trans-expr.c:10208
0x6bf54f trans_code
../../gcc/fortran/trans.c:1822
0x6e6e14 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6509
0x6740a6 translate_all_program_units
../../gcc/fortran/parse.c:6125
0x6740a6 gfc_parse_file()
../../gcc/fortran/parse.c:6328
>From gcc-bugs-return-620578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 18:58:10 2018
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From: "spop at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87917] ICE in initialize_matrix_A at gcc/tree-data-ref.c:3150
Date: Thu, 08 Nov 2018 18:58:00 -0000
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Sebastian Pop <spop at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |spop at gcc dot gnu.org
--- Comment #3 from Sebastian Pop <spop at gcc dot gnu.org> ---
> Sebastian - can you say if
> evolution_function_is_affine_multivariate_p ({0, +, {0, +, 4}_1}_2, 1)
> should really return true?
You are right, {0, +, {0, +, 4}_1}_2 is not a valid affine multivariate
function: only the base (not the step) should vary in an outer loop.
For example, this would be an affine multivariate: {{0, +, 4}_1, +, 42}_2.
>From gcc-bugs-return-620579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 20:22:02 2018
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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/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
Date: Thu, 08 Nov 2018 20:22:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-620580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 20:35:04 2018
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From: "sandra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/43105] Document restrictions on mixing -fno-rtti and -frtti
Date: Thu, 08 Nov 2018 20:35:00 -0000
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sandra at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |sandra at gcc dot gnu.org
--- Comment #4 from sandra at gcc dot gnu.org ---
It sounds to me like the right solution here is just to add a vague warning
that mixing -frtti and -fno-rtti code may not always work, citing the base
class example in the issue problem statement. WDYT?
>From gcc-bugs-return-620581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 20:40:12 2018
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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/87902] [9 Regression] Shrink-wrapping multiple conditions
Date: Thu, 08 Nov 2018 20:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87902
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
All instructions that depend on the new registers can start later, too, if
you move all new registers down. If you move copies from hard registers
down it is much worse: you are extending the lifetime of those hard regs
so that nothing else can live there, but more likely, it will have to be
spilled even.
>From gcc-bugs-return-620582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 20:58:13 2018
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87269] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475 starting from r261802
Date: Thu, 08 Nov 2018 20:58:00 -0000
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--- Comment #5 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Martin, this isn't icing now.
>From gcc-bugs-return-620583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 21:01:06 2018
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From: "nathan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87814] [9 Regression] ICE in in tsubst_copy, at cp/pt.c:15962 with range-v3
Date: Thu, 08 Nov 2018 21:01:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nathan at gcc dot gnu.org
--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
This is ICEing, but not in tsubst_copy:
87814.ii:19:8: internal compiler error: Segmentation fault
19 | struct adaptor_cursor : compressed_tuple_<int*> {
| ^~~~~~~~~~~~~~
0xb08b4f crash_signal
../../../src/gcc/toplev.c:325
0x5ac177 standard_conversion
../../../src/gcc/cp/call.c:1122
0x5b226b implicit_conversion
../../../src/gcc/cp/call.c:1860
0x5af991 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
../../../src/gcc/cp/call.c:10909
0x61d8be build_noexcept_spec(tree_node*, int)
../../../src/gcc/cp/except.c:1198
0x6a65d2 maybe_instantiate_noexcept(tree_node*, int)
../../../src/gcc/cp/pt.c:23802
0x5f5a2c start_preparsed_function(tree_node*, tree_node*, int)
../../../src/gcc/cp/decl.c:15430
0x63a6c1 synthesize_method(tree_node*)
../../../src/gcc/cp/method.c:913
0x6adaed instantiate_decl(tree_node*, bool, bool)
../../../src/gcc/cp/pt.c:24198
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Subject: [Bug c++/87137] [8/9 Regression] Non-virtual member function increases struct size
Date: Thu, 08 Nov 2018 21:02:00 -0000
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #15 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
I forgot to mark this fixed.
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Subject: [Bug c++/87814] [9 Regression] ICE in in tsubst_copy, at cp/pt.c:15962 with range-v3
Date: Thu, 08 Nov 2018 21:05:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I actually still see an ICE in tsubst_copy:
h.C: In instantiation of ‘constexpr adaptor_cursor::adaptor_cursor(Args&& ...)
[with Args = {int*}][inherited from compressed_tuple_<int*>]’:
h.C:24:43: required from here
h.C:20:30: internal compiler error: in tsubst_copy, at cp/pt.c:16090
20 | using compressed_tuple_::compressed_tuple_;
| ^~~~~~~~~~~~~~~~~
0x80b870 tsubst_copy
/home/mpolacek/src/gcc/gcc/cp/pt.c:16090
0xa3cbc2 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/mpolacek/src/gcc/gcc/cp/pt.c:19160
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bool)
/home/mpolacek/src/gcc/gcc/cp/pt.c:17862
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/home/mpolacek/src/gcc/gcc/cp/pt.c:14231
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/home/mpolacek/src/gcc/gcc/cp/pt.c:23584
0xa509b4 instantiate_decl(tree_node*, bool, bool)
/home/mpolacek/src/gcc/gcc/cp/pt.c:24154
0x8e74c9 instantiate_cx_fn_r
/home/mpolacek/src/gcc/gcc/cp/constexpr.c:4944
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Subject: =?UTF-8?B?W0J1ZyBvdGhlci8zNjU3Ml0gRG9jdW1lbnRhdGlvbiBmb3Igc29tZSBvcHRp?= =?UTF-8?B?b25zIHN0YXJ0aW5nIHdpdGgg4oCcbm8t4oCdIG5vdCBjbGVhcg==?Date: Thu, 08 Nov 2018 22:03:00 -0000
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--- Comment #1 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Thu Nov 8 22:02:38 2018
New Revision: 265939
URL: https://gcc.gnu.org/viewcvs?rev=265939&root=gcc&view=rev
Log:
2018-11-08 Sandra Loosemore <sandra@codesourcery.com>
PR other/36572
gcc/
* doc/invoke.texi (Optimize Options): Clarify default behavior
for -fno-sched-interblock and -fno-sched-spec.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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sandra at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #2 from sandra at gcc dot gnu.org ---
Fixed (finally) on trunk.
>From gcc-bugs-return-620588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 22:22:40 2018
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Subject: [Bug c++/87947] New: Symbol Does Not Appear in Object File
Date: Thu, 08 Nov 2018 22:22:00 -0000
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Bug ID: 87947
Summary: Symbol Does Not Appear in Object File
Product: gcc
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Component: c++
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A symbol is not exposed in cirucumstances where it seems it should be, and is
exposed in version 6.3.0 (and clang 7.0.0, fwiw).
$ gcc --save-temps -std=c++17 -c symbol.cpp
$ cat symbol.ii
# 1 "symbol.cpp"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "symbol.cpp"
struct A {
static constexpr auto foobar = 0;
};
constexpr int A::foobar;
$ nm symbol.o
$
The expected behavior is that A::foobar is exposed as a symbol. Note that
-std=c++17 is required to duplicate this.
The same thing done with 6.3.0 results in this.
$ nm symbol.o
0000000000000000 R _ZN1A6foobarE
Version information is as follows.
$ 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 20180831 (GCC)
>From gcc-bugs-return-620589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 22:38:52 2018
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Subject: [Bug tree-optimization/87931] [9 Regression] ICE in vectorizable_reduction, at tree-vect-loop.c:6193 since r265876
Date: Thu, 08 Nov 2018 22:38:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dcb314 at hotmail dot com
--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Might be related to this:
==6494==ERROR: AddressSanitizer: stack-buffer-overflow on address
0x7ffcf43dbd58 at pc 0x000002cfffdd bp 0x7ffcf43da650 sp 0x7ffcf43da648
READ of size 8 at 0x7ffcf43dbd58 thread T0
#0 0x2cfffdc in vectorizable_reduction(_stmt_vec_info*,
gimple_stmt_iterator*, _stmt_vec_info**, _slp_tree*, _slp_instance*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
../../trunk/gcc/tree-vect-loop.c:6485
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Subject: [Bug rtl-optimization/87600] Fix for PRs 86939 and 87479 causes build issues for several targets
Date: Thu, 08 Nov 2018 22:40:00 -0000
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--- Comment #6 from Peter Bergner <bergner at gcc dot gnu.org> ---
Author: bergner
Date: Thu Nov 8 22:39:45 2018
New Revision: 265942
URL: https://gcc.gnu.org/viewcvs?rev=265942&root=gcc&view=rev
Log:
gcc/
PR rtl-optimization/87600
* cfgexpand.c (expand_asm_stmt): Catch illegal asm constraint usage.
* lra-constraints.c (process_alt_operands): Skip illegal hard
register usage. Prefer reloading non hard register operands.
gcc/testsuite/
PR rtl-optimization/87600
* gcc.dg/pr87600.h: New file.
* gcc.dg/pr87600-1.c: New test.
* gcc.dg/pr87600-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/pr87600-1.c
trunk/gcc/testsuite/gcc.dg/pr87600-2.c
trunk/gcc/testsuite/gcc.dg/pr87600.h
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgexpand.c
trunk/gcc/lra-constraints.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-620591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 08 22:46:22 2018
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Subject: [Bug rtl-optimization/87600] Fix for PRs 86939 and 87479 causes build issues for several targets
Date: Thu, 08 Nov 2018 22:46:00 -0000
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Peter Bergner <bergner at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Peter Bergner <bergner at gcc dot gnu.org> ---
Ok, I think this resolves all but one ARM issue which is being tracked in
PR87899, so I'm going to mark this bugzilla as fixed.
>From gcc-bugs-return-620592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 00:49:13 2018
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/87948] New: LRA register allocator does not support HARD_REGNO_CALLER_SAVE_MODE returning VOIDmode
Date: Fri, 09 Nov 2018 00:49:00 -0000
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Bug ID: 87948
Summary: LRA register allocator does not support
HARD_REGNO_CALLER_SAVE_MODE returning VOIDmode
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: meissner at gcc dot gnu.org
Target Milestone: ---
The documentation for HARD_REGNO_CALLER_SAVE_MODE states:
@defmac HARD_REGNO_CALLER_SAVE_MODE (@var{regno}, @var{nregs})
A C expression specifying which mode is required for saving @var{nregs}
of a pseudo-register in call-clobbered hard register @var{regno}. If
@var{regno} is unsuitable for caller save, @code{VOIDmode} should be
returned. For most machines this macro need not be defined since GCC
will select the smallest suitable mode.
@end defmac
I was trying to prevent the GCC compiler from saving and restoring CR registers
across calls, so I defined HARD_REGNO_CALLER_SAVE_MODE as:
/* When setting up caller-save slots (MODE == VOIDmode) ensure we allocate
enough space to account for vectors in FP regs. However, TFmode/TDmode
should not use VSX instructions to do a caller save. Return VOIDmode
for the CR registers so that we don't try to save them across calls. */
#define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
(CR_REGNO_P (REGNO) \
? VOIDmode \
: (NREGS) <= rs6000_hard_regno_nregs[MODE][REGNO] \
? (MODE) \
: TARGET_VSX \
&& ((MODE) == VOIDmode || ALTIVEC_OR_VSX_VECTOR_MODE (MODE)) \
&& FP_REGNO_P (REGNO) \
? V2DFmode \
: FLOAT128_IBM_P (MODE) && FP_REGNO_P (REGNO) \
? DFmode \
: (MODE) == TDmode && FP_REGNO_P (REGNO) \
? DImode \
: choose_hard_reg_mode ((REGNO), (NREGS), false))
However, when I try to build the compiler (without bootstrap initially), I get
the following error:
during RTL pass: reload
/home/meissner/fsf-src/test/libbacktrace/elf.c: In function 'elf_add':
/home/meissner/fsf-src/test/libbacktrace/elf.c:3211:1: internal compiler error:
in lra_create_new_reg_with_unique_value, at lra.c:189
3211 | }
| ^
0x107bba3f lra_create_new_reg_with_unique_value(machine_mode, rtx_def*,
reg_class, char const*)
/home/meissner/fsf-src/test/gcc/lra.c:189
0x107bbabf lra_create_new_reg(machine_mode, rtx_def*, reg_class, char const*)
/home/meissner/fsf-src/test/gcc/lra.c:229
0x107ce00b split_reg
/home/meissner/fsf-src/test/gcc/lra-constraints.c:5566
0x107d5aa3 inherit_in_ebb
/home/meissner/fsf-src/test/gcc/lra-constraints.c:6568
0x107d5aa3 lra_inheritance()
/home/meissner/fsf-src/test/gcc/lra-constraints.c:6639
0x107c0f37 lra(_IO_FILE*)
/home/meissner/fsf-src/test/gcc/lra.c:2486
0x1075abeb do_reload
/home/meissner/fsf-src/test/gcc/ira.c:5469
0x1075abeb execute
/home/meissner/fsf-src/test/gcc/ira.c:5653
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.
Makefile:820: recipe for target 'elf.lo' failed
make[3]: *** [elf.lo] Error 1
make[3]: Leaving directory
'/home/meissner/fsf-build-ppc64le/test/powerpc64le-unknown-linux-gnu/libbacktrace'
Makefile:700: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory
'/home/meissner/fsf-build-ppc64le/test/powerpc64le-unknown-linux-gnu/libbacktrace'
Makefile:13084: recipe for target 'all-target-libbacktrace' failed
make[1]: *** [all-target-libbacktrace] Error 2
make[1]: Leaving directory '/home/meissner/fsf-build-ppc64le/test'
Makefile:939: recipe for target 'all' failed
make: *** [all] Error 2
>From gcc-bugs-return-620593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 00:59:46 2018
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Subject: [Bug target/87949] New: PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 00:59:00 -0000
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Bug ID: 87949
Summary: PowerPC saves CR registers across calls
Product: gcc
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While there are 3 saved CR registers (CR2, CR3, CR4) in the PowerPC, we really,
really, really should not be saving CR values across calls due to the amount of
time it takes to save and restore these registers.
This shows up in the Spec 2006 perlbench benchmark where the hot function
(S_regmatch in regexep.c) saves all 3 CRs at the function prologue, and has to
restore these registers at the epilog.
It also shows up in the gamess benchmark (which is where I found it in doing
some future code). Note only do functions in gamess save all 3 CR registers,
at least one function decides to use caller saves to save a 4th CR register
across a call.
I'm not sure whether this is a target feature or a machine independent feature
at this point. My first attempt at fixing it via HARD_REGNO_CALLER_SAVE_MODE
fails due to LRA not supporting it returning VOIDmode (PR 87948).
>From gcc-bugs-return-620594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 01:10:30 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87947] Symbol Does Not Appear in Object File
Date: Fri, 09 Nov 2018 01:10:00 -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 comm+gnu from comment #0)
> The expected behavior is that A::foobar is exposed as a symbol. Note that
> -std=c++17 is required to duplicate this.
Your expectation is wrong. In C++17 the static data member is implicitly
"inline" which means a definition is only emitted when it's odr-used (and the
namespace scope definition is redundant, and deprecated).
GCC 6.x does not implement the C++17 rule, so still emits the symbol.
If you need to ensure a definition is emitted in a given object file either
compile it as C++14, or mark it as used:
[[gnu::used]] constexpr int A::foobar;
>From gcc-bugs-return-620595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 01:12:12 2018
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Works for me.
>From gcc-bugs-return-620596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 01:14:22 2018
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 01:14:00 -0000
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--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 44980
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44980&action=edit
Fortran file showing problem from gamess
Compile this file with the '-Ofast -g -S -std=legacy -mcpu=power9' options.
In the assembly file, at line 1262, there is a store from a MFCR instruction to
save a CR register, and on line 1381 there is a load and a MTCRF instruction to
restore it.
>From gcc-bugs-return-620597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 01:16:09 2018
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 01:16:00 -0000
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--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 44981
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44981&action=edit
Bzip2 assembly file from the fortran source
In the assembly file, at line 1262, there is a store from a MFCR instruction to
save a CR register, and on line 1381 there is a load and a MTCRF instruction to
restore it.
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Subject: [Bug rtl-optimization/87948] LRA register allocator does not support HARD_REGNO_CALLER_SAVE_MODE returning VOIDmode
Date: Fri, 09 Nov 2018 01:17:00 -0000
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--- Comment #1 from Michael Meissner <meissner at gcc dot gnu.org> ---
I entered bug 87949 as the bug I was trying to fix when I encountered the
HARD_REGNO_CALLER_SAVE issue.
>From gcc-bugs-return-620599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 02:28:34 2018
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 02:28:00 -0000
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--- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> ---
What do you think we can do about that? The call clobbers the ABI defined
non-volatile CR regs, so we have to save/restore them. I don't think we have
any other option, other than telling GCC to never use the non-volatile CR regs
so they never have to be saved/restored. Does using -ffixed-cr2 -ffixed-cr3
-ffixed-cr4 help?
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Subject: [Bug fortran/78351] comma not terminating READ of formatted input field - ok in 4.1.7, not 4.4.7- maybe related to 25419?
Date: Fri, 09 Nov 2018 02:46:00 -0000
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--- Comment #24 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Fri Nov 9 02:46:03 2018
New Revision: 265946
URL: https://gcc.gnu.org/viewcvs?rev=265946&root=gcc&view=rev
Log:
2018-11-08 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libfortran/78351
* io/transfer.c (read_sf_internal): Add support for early
comma termination of internal unit formatted reads.
* gfortran.dg/read_legacy_comma.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/read_legacy_comma.f90
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/transfer.c
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Subject: [Bug c/87950] New: GCC warns about reaching end of non-void function when all switch is completely handled
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Bug ID: 87950
Summary: GCC warns about reaching end of non-void function when
all switch is completely handled
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Noticed this for a while. If a function has a single switch statement that
handles all enum values & returns a value GCC will warn about the function not
returning a value whereas clang does not. GCC requires an explicit
__builtin_unreachable() annotation after the switch. Maybe it's an intentional
disagreement over how to interpret the spec? AFAICT via objdump the generated
assembly is identical between clang & GCC even when compiled with
optimizations.
> cat test.c
enum Enum {
A,
B,
};
int CoverMyBases(enum Enum x) {
switch (x) {
case A:
return 1;
case B:
return 0;
}
}
int main(int argc, const char **argv) {
CoverMyBases(A);
CoverMyBases(B);
return 0;
}
> gcc-8 -Wall test.c
test.c: In function 'CoverMyBases':
test.c:16:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
> clang -Wall test.c
> gcc-8 --version
gcc-8 (Homebrew GCC 8.2.0) 8.2.0
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.
> clang --version
Apple LLVM version 10.0.0 (clang-1000.11.45.2)
Target: x86_64-apple-darwin17.7.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
This applies to both C & C++.
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
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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> ---
In C, enum valid value range is the full int range.
So all switch cases are not being handled even for valid C code.
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
Date: Fri, 09 Nov 2018 03:39:00 -0000
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--- Comment #2 from Vitali <vlovich at gmail dot com> ---
Why has clang made a different decision? Also, this warning is present in C++
code too.
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
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Vitali <vlovich at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Vitali <vlovich at gmail dot com> ---
Follow-up comment.
>From gcc-bugs-return-620605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 04:21:40 2018
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From: "hoganmeier at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/12849] testing divisibility by constant
Date: Fri, 09 Nov 2018 04:21:00 -0000
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krux <hoganmeier at gmail dot com> changed:
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--- Comment #5 from krux <hoganmeier at gmail dot com> ---
Should be fixed in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82853
>From gcc-bugs-return-620606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 04:28:25 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
Date: Fri, 09 Nov 2018 04:28:00 -0000
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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> ---
(In reply to Vitali from comment #2)
> Why has clang made a different decision? Also, this warning is present in
> C++ code too.
You need to ask clang why they made that decision. C rules are clear about
value ranges of enums and all.
In C++, (unlike C), out of ranges are just unspecified rather than undefined.
This means the warning is correct too. NOTE there is a big difference between
the three: implmenentation defined, undefined and unspecified behaviors.
implmenentation defined is behavior that needs to be documented. Undefined
behavior means the behavior can be different at different runs. unspecified
behaviors means the behavior does not need to be documented but it has to be
constitiant between runs.
So there is no bug here again.
See PR12242 also about a warning for the unspecified behavior when doing the
conversion; NOTE it is not undefined which is different.
See also https://gcc.gnu.org/ml/gcc-patches/2010-04/msg01694.html .
Also see PR 53479 for the C++ side of the warning too (for enum classes).
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Vitali from comment #2)
> Why has clang made a different decision? Also, this warning is present in
> C++ code too.
You need to ask clang why they made that decision. C rules are clear about
value ranges of enums and all.
In C++, (unlike C), out of ranges are just unspecified rather than undefined.
This means the warning is correct too. NOTE there is a big difference between
the three: implmenentation defined, undefined and unspecified behaviors.
implmenentation defined is behavior that needs to be documented. Undefined
behavior means the behavior can be different at different runs. unspecified
behaviors means the behavior does not need to be documented but it has to be
constitiant between runs.
So there is no bug here again.
See PR12242 also about a warning for the unspecified behavior when doing the
conversion; NOTE it is not undefined which is different.
See also https://gcc.gnu.org/ml/gcc-patches/2010-04/msg01694.html .
Also see PR 53479 for the C++ side of the warning too (for enum classes).
>From gcc-bugs-return-620607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 04:28:26 2018
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Vitali from comment #2)
> Why has clang made a different decision? Also, this warning is present in
> C++ code too.
You need to ask clang why they made that decision. C rules are clear about
value ranges of enums and all.
In C++, (unlike C), out of ranges are just unspecified rather than undefined.
This means the warning is correct too. NOTE there is a big difference between
the three: implmenentation defined, undefined and unspecified behaviors.
implmenentation defined is behavior that needs to be documented. Undefined
behavior means the behavior can be different at different runs. unspecified
behaviors means the behavior does not need to be documented but it has to be
constitiant between runs.
So there is no bug here again.
See PR12242 also about a warning for the unspecified behavior when doing the
conversion; NOTE it is not undefined which is different.
See also https://gcc.gnu.org/ml/gcc-patches/2010-04/msg01694.html .
Also see PR 53479 for the C++ side of the warning too (for enum classes).
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Vitali from comment #2)
> Why has clang made a different decision? Also, this warning is present in
> C++ code too.
You need to ask clang why they made that decision. C rules are clear about
value ranges of enums and all.
In C++, (unlike C), out of ranges are just unspecified rather than undefined.
This means the warning is correct too. NOTE there is a big difference between
the three: implmenentation defined, undefined and unspecified behaviors.
implmenentation defined is behavior that needs to be documented. Undefined
behavior means the behavior can be different at different runs. unspecified
behaviors means the behavior does not need to be documented but it has to be
constitiant between runs.
So there is no bug here again.
See PR12242 also about a warning for the unspecified behavior when doing the
conversion; NOTE it is not undefined which is different.
See also https://gcc.gnu.org/ml/gcc-patches/2010-04/msg01694.html .
Also see PR 53479 for the C++ side of the warning too (for enum classes).
>From gcc-bugs-return-620608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 04:34:40 2018
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
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Vitali <vlovich at gmail dot com> changed:
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--- Comment #6 from Vitali <vlovich at gmail dot com> ---
Actually as of C++17 it's undefined behaviour.
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1766
so at the very least when compiled with C++17 the compiler should be smart
enough to strengthen the control flow analysis.
>From gcc-bugs-return-620609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 04:41:12 2018
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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/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
Date: Fri, 09 Nov 2018 04:41:00 -0000
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--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Vitali from comment #6)
> Actually as of C++17 it's undefined behaviour.
>
> http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1766
>
> so at the very least when compiled with C++17 the compiler should be smart
> enough to strengthen the control flow analysis.
Open a C++ bug then rather than reusing a C bug report ...
>From gcc-bugs-return-620610-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 04:46:08 2018
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From: "vlovich at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87951] New: GCC warns about reaching end of non-void function when all switch is completely handled
Date: Fri, 09 Nov 2018 04:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87951
Bug ID: 87951
Summary: GCC warns about reaching end of non-void function when
all switch is completely handled
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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If a function has a single switch statement that handles all enum values &
returns a value GCC will warn about the function not returning a value whereas
clang does not. GCC requires an explicit __builtin_unreachable() annotation
after the switch. As of C++17 it seems to now be undefined behaviour rather
than unspecified behaviour for an enum to have a value that's not enumerated.
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1766
> cat test.c
enum Enum {
A,
B,
};
int CoverMyBases(enum Enum x) {
switch (x) {
case A:
return 1;
case B:
return 0;
}
}
int main(int argc, const char **argv) {
CoverMyBases(A);
CoverMyBases(B);
return 0;
}
> g++-8 -Wall --std=c++17 test.c
test.c: In function 'CoverMyBases':
test.c:16:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
> clang++ -std=c++17 -Wall test.c
NOTE: Clang never warns about this even prior to C++17 or in C either.
>From gcc-bugs-return-620611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 06:40:37 2018
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From: "narut.se at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87952] New: Missed optimization for std::get_if on std::variant
Date: Fri, 09 Nov 2018 06:40:00 -0000
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Bug ID: 87952
Summary: Missed optimization for std::get_if on std::variant
Product: gcc
Version: 8.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Here is the sample code:
#include <variant>
int test(std::variant<int, bool> &v)
{
return *std::get_if<int>(&v);
}
gcc generates (on x86-64):
test(std::variant<int, bool>&):
cmp BYTE PTR [rdi+4], 0
jne .L2
mov eax, DWORD PTR [rdi]
ret
test(std::variant<int, bool>&) [clone .cold]:
.L2:
mov eax, DWORD PTR ds:0
ud2
It seems like the undefined behavior branch can be optimized away leaving (as
clang does):
test(std::variant<int, bool>&): # @test(std::variant<int, bool>&)
mov eax, dword ptr [rdi]
ret
The reason this is useful is that if I know ahead of time (but the compiler
can't prove) that the variant holds a certain alternative, calling get_if this
way will provide no overhead access to the alternative. (The standard doesn't
allow this kind of access for std::get.) Since dereferencing the null pointer
(as would happen if the variant didn't hold the alternative) is undefined
behavior anyway, we could optimize it away and assume that the alternative is
valid.
>From gcc-bugs-return-620612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:01:15 2018
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Subject: [Bug target/87928] [7/8/9 Regression] ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
Date: Fri, 09 Nov 2018 08:01:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
Target| |x86_64
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Patch at [1].
[1] https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00679.html
>From gcc-bugs-return-620613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:09:19 2018
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Subject: [Bug c++/87269] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475 starting from r261802
Date: Fri, 09 Nov 2018 08:09:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I can still see it iceing:
https://godbolt.org/z/tvHnzW
Can you please also try the duplicate?
>From gcc-bugs-return-620614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:16:43 2018
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Thank you Andrew for clarification of the behavior. Apparently it's quite
common question. One note that I have about C behavior is that we can maybe
also add -fstrict-enums to behave the same as in C++. Thoughts?
>From gcc-bugs-return-620615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:18:44 2018
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-11-9
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org,
| |redi at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=87950
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1766
>
Can you please Jason and Jonathan comment about it? Can we strengthen behavior?
>From gcc-bugs-return-620616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:20:21 2018
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Fri, 09 Nov 2018 08:20:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
One more comment here. I do cooperate with our openSUSE maintainer of Chromium
package and they have quite some of these warnings when building with GCC. I
told him he can strengthen behavior with -fstrict-enums option. Once we did
that the package crashes during build.
>From gcc-bugs-return-620617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:21:04 2018
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
Date: Fri, 09 Nov 2018 08:21:00 -0000
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--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #8)
> Thank you Andrew for clarification of the behavior. Apparently it's quite
> common question. One note that I have about C behavior is that we can maybe
> also add -fstrict-enums to behave the same as in C++. Thoughts?
No, we try not to add extensions which change well defined behavior to be
undefined behavior. Adding -fstrict-enums for C would cause just that.
>From gcc-bugs-return-620618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:25:12 2018
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
Date: Fri, 09 Nov 2018 08:25:00 -0000
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--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #9)
> (In reply to Martin Liška from comment #8)
> > Thank you Andrew for clarification of the behavior. Apparently it's quite
> > common question. One note that I have about C behavior is that we can maybe
> > also add -fstrict-enums to behave the same as in C++. Thoughts?
>
> No, we try not to add extensions which change well defined behavior to be
> undefined behavior. Adding -fstrict-enums for C would cause just that.
Good, then as mentioned explicit usage of __builtin_unreachable() will enable
desired optimization.
Then, let's close this as invalid?
>From gcc-bugs-return-620619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 08:49:01 2018
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Subject: [Bug c/87953] New: asan: stack-buffer-overflow in vectorizable_reduction
Date: Fri, 09 Nov 2018 08:49:00 -0000
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Bug ID: 87953
Summary: asan: stack-buffer-overflow in vectorizable_reduction
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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For this C code:
int a[];
int b;
void d() {
char c;
b = 0;
for (; b < 6; b++) {
c = 1;
for (; c; c <<= 1) {
a[b] <<= 8;
if (b & c)
a[b] = 1;
}
}
}
compiled with -O3 on recent gcc trunk with asan, does this:
==18849==ERROR: AddressSanitizer: stack-buffer-overflow on address
0x7ffd0eb77e48 at pc 0x000002cfffdd bp 0x7ffd0eb76740 sp 0x7ffd0eb76738
READ of size 8 at 0x7ffcfa4901f8 thread T0
#0 0x2cfffdc in vectorizable_reduction(_stmt_vec_info*,
gimple_stmt_iterator
*, _stmt_vec_info**, _slp_tree*, _slp_instance*, vec<stmt_info_for_cost,
va_heap
, vl_ptr>*) ../../trunk/gcc/tree-vect-loop.c:6485
...
[5472, 5496) 'ops' (line 6004) <== Memory access at offset 5464 underflows
t
his variable
Line 6485 is
if (!vec_stmt && !vectorizable_condition (stmt_info, gsi, NULL,
ops[reduc_index], 0, NULL,
cost_vec))
I am not sure if overflow or underflow is occurring, but since ops is
a local array, I am guessing someone needs to sanity check array indexes
before use.
Problem didn't occur in gcc revision 265683 and does by revision 265907.
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Subject: [Bug tree-optimization/87931] [9 Regression] ICE in vectorizable_reduction, at tree-vect-loop.c:6193 since r265876
Date: Fri, 09 Nov 2018 08:50:00 -0000
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--- Comment #3 from David Binderman <dcb314 at hotmail dot com> ---
My asan error looks different to me. See new bug report 87953.
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Subject: [Bug c/87953] asan: stack-buffer-overflow in vectorizable_reduction
Date: Fri, 09 Nov 2018 08:52:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
svn blame says
263143 rsandifo if (!vec_stmt && !vectorizable_condition (stmt_info,
gsi, NULL,
260289 rguenth
ops[reduc_index], 0, NULL,
260289 rguenth cost_vec))
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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/87954] New: VRP can transform a * b where a,b are [0,1] to a & b
Date: Fri, 09 Nov 2018 09:09:00 -0000
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Bug ID: 87954
Summary: VRP can transform a * b where a,b are [0,1] to a & b
Product: gcc
Version: 9.0
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Code snippet reported by kernel developers:
$ cat mul.c
#define __GFP_DMA 1u
#define __GFP_RECLAIM 0x10u
#define KMALLOC_DMA 2
#define KMALLOC_RECLAIM 1
unsigned int and(unsigned int flags)
{
int is_dma, type_dma, is_rec;
is_dma = !!(flags & __GFP_DMA);
type_dma = is_dma * KMALLOC_DMA;
is_rec = !!(flags & __GFP_RECLAIM);
return type_dma + (is_rec & !is_dma) * KMALLOC_RECLAIM;
}
unsigned int imul(unsigned int flags)
{
int is_dma, type_dma, is_rec;
is_dma = !!(flags & __GFP_DMA);
type_dma = is_dma * KMALLOC_DMA;
is_rec = !!(flags & __GFP_RECLAIM);
return type_dma + (is_rec * !is_dma) * KMALLOC_RECLAIM;
}
The first function ends with fast and operation:
and:
.LFB0:
.cfi_startproc
movl %edi, %edx
movl %edi, %eax
andl $1, %edi
shrl $4, %edx
notl %eax
andl %edx, %eax
andl $1, %eax
leal (%rax,%rdi,2), %eax
ret
while the second one with imull
imul:
.LFB1:
.cfi_startproc
movl %edi, %eax
movl %edi, %edx
andl $1, %edi
shrl $4, %edx
notl %eax
andl $1, %eax
andl $1, %edx
imull %edx, %eax
leal (%rax,%rdi,2), %eax
ret
.cfi_endproc
VRP knows about the range of the operands:
_7 = _6 * is_rec_12;
_6: [0, 1]
is_rec_12: [0, 1]
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Subject: [Bug sanitizer/87892] [9 Regression]: libsanitizer fails to build on CentOS 5.11 (glibc 2.5)
Date: Fri, 09 Nov 2018 09:15:00 -0000
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--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Fri Nov 9 09:14:36 2018
New Revision: 265950
URL: https://gcc.gnu.org/viewcvs?rev=265950&root=gcc&view=rev
Log:
Fallback in libsanitizer for scudo sanitizer (PR sanitizer/87892).
2018-11-09 Martin Liska <mliska@suse.cz>
PR sanitizer/87892
* sanitizer_common/sanitizer_linux_libcdep.cc (defined): Return
1 when CPU_COUNT macro is not defined.
Modified:
trunk/libsanitizer/ChangeLog
trunk/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc
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Subject: [Bug target/87793] [8/9 Regression] GCC reports error when compiling with "-fpic -Os -g"
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--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Fri Nov 9 10:15:46 2018
New Revision: 265956
URL: https://gcc.gnu.org/viewcvs?rev=265956&root=gcc&view=rev
Log:
[PR87793] reject non-toplevel unspecs in debug loc exprs on x86
Before revision 254025, we'd reject UNSPECs in debug loc exprs.
TARGET_CONST_NOT_OK_FOR_DEBUG_P still rejects that by default, on all
ports that override it, except for x86, that accepts @gotoff unspecs.
We can indeed accept them in top-level expressions, but not as
subexpressions: the assembler rejects the difference between two
@gotoff symbols, for example.
We could simplify such a difference and drop the @gotoffs, provided
that the symbols are in the same section; we could also accept
@gotoffs plus literal constants. However, accepting those but
rejecting such combinations as subexpressions would be ugly, and most
likely not worth the trouble: sym@gotoff+litconst hardly makes sense
as a standalone expression, and the difference between @gotoffs should
be avoided to begin with, as follows.
Ideally, the debug loc exprs would use the symbolic data in
REG_EQUIV/REG_EQUAL notes, or delegitimized addresses, instead of
simplifying the difference between two legitimized addresses so that
the occurrences of the GOT register cancel each other. That would
require some more elaborate surgery in var-tracking and cselib than
would be appropriate at this stage.
for gcc/ChangeLog
PR target/87793
* config/i386/i386.c (ix86_const_not_ok_for_debug_p): Reject
non-toplevel UNSPEC.
for gcc/testsuite/ChangeLog
PR target/87793
* gcc.dg/pr87793.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/pr87793.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/87902] [9 Regression] Shrink-wrapping multiple conditions
Date: Fri, 09 Nov 2018 10:16:00 -0000
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--- Comment #5 from Ilya Leoshkevich <iii at linux dot ibm.com> ---
By the time shrink-wrapping is performed, which is after LRA
(pass_thread_prologue_and_epilogue, to be precise), aren't all spilling
decisions already made? Because if that's true, we have to be
conservative in prepare_shrink_wrap () anyway, and move down copies only
when the parameter register still contains the parameter value.
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Subject: [Bug rtl-optimization/86438] [8/9 Regression] wrong code at -Os
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--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Author: aoliva
Date: Fri Nov 9 10:16:09 2018
New Revision: 265957
URL: https://gcc.gnu.org/viewcvs?rev=265957&root=gcc&view=rev
Log:
[PR86438] compare-elim: cope with set of in_b
When in_a resolves to a register set in the prev_clobber insn, we may
use the SET_SRC for the compare instead. However, when in_b so
resolves, we proceed to use the reg with its earlier value. When both
resolve to the same register and prev_clobber is an insn that modifies
the register, this arrangement may cause the compare to match (when it
shouldn't) and the elimination of the compare to incorrectly succeed.
(set (reg 1) (plus (reg 1) (const_int N)))
(set (reg 2) (reg 1))
(set (reg flags) (compare (reg 1) (reg 2)))
in_a: (reg 1) --> (plus (reg 1) (const_int N))
in_b: (reg 2) -> (reg 1) -/> oops
(parallel [
(set (reg flags) (compare (plus (reg 1) (const_int N))
(reg 1))) ;; should be (plus...)
(set (reg 1) (plus (reg 1) (const_int N)))])
(set (reg 2) (reg 1))
This patch arranges for in_b to also undergo SET_SRC substitution
when appropriate, with a shortcut for when in_a and in_b are the same
rtx.
for gcc/ChangeLog
PR rtl-optimization/86438
* compare-elim.c (try_eliminate_compare): Use SET_SRC instead
of in_b for the compare if in_b is SET_DEST.
for gcc/testsuite/ChangeLog
PR rtl-optimization/86438
* gcc.dg/torture/pr86438.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr86438.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/compare-elim.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug ipa/87955] New: [9 Regression] ICE in cl_target_option_print_diff at gcc/options-save.c:3803 since r265920
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Bug ID: 87955
Summary: [9 Regression] ICE in cl_target_option_print_diff at
gcc/options-save.c:3803 since r265920
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: dmalcolm at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Following is iceing:
$ cat /tmp/ice.i
float a;
__attribute__((__target__("fpmath=387")))
void b() {
if (a)
__builtin_abort();
}
void c() { b(); }
$ ./xgcc -B. -O2 -fopt-info /tmp/ice.i -c
during GIMPLE pass: einline
/tmp/ice.i: In function ‘c’:
/tmp/ice.i:9:1: internal compiler error: Segmentation fault
9 | void c() { b(); }
| ^~~~
0xd0f73f crash_signal
/home/marxin/Programming/gcc/gcc/toplev.c:325
0x7ffff6bc310f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7ffff6c03d8a fputc
/usr/src/debug/glibc-2.27-6.1.x86_64/libio/fputc.c:35
0xc29812 cl_target_option_print_diff(_IO_FILE*, int, cl_target_option*,
cl_target_option*)
/dev/shm/objdir/gcc/options-save.c:3803
0x155bf98 report_inline_failed_reason
/home/marxin/Programming/gcc/gcc/ipa-inline.c:248
0x155c470 can_inline_edge_p
/home/marxin/Programming/gcc/gcc/ipa-inline.c:381
0x155d386 can_early_inline_edge_p
/home/marxin/Programming/gcc/gcc/ipa-inline.c:578
0x1563c1b early_inline_small_functions
/home/marxin/Programming/gcc/gcc/ipa-inline.c:2690
0x1564018 early_inliner(function*)
/home/marxin/Programming/gcc/gcc/ipa-inline.c:2803
0x1564225 execute
/home/marxin/Programming/gcc/gcc/ipa-inline.c:2885
>From gcc-bugs-return-620628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:25:58 2018
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Subject: [Bug ipa/87955] [9 Regression] ICE in cl_target_option_print_diff at gcc/options-save.c:3803 since r265920
Date: Fri, 09 Nov 2018 10:25:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Known to fail| |9.0
>From gcc-bugs-return-620629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:26:37 2018
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From: "romain.geissler at amadeus dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87956] New: Gcc should emit deprecation warnings when using throw() in C++ >= 17
Date: Fri, 09 Nov 2018 10:26:00 -0000
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Bug ID: 87956
Summary: Gcc should emit deprecation warnings when using
throw() in C++ >= 17
Product: gcc
Version: 9.0
Status: UNCONFIRMED
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Reporter: romain.geissler at amadeus dot com
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Hi,
Today gcc always generates an error when you use a dynamic exception
specification with some exception. However I would expect we might also get a
warning with -Wdeprecated for "throw()" expressions.
With -std=gnu++17 -Wdeprecated
#include <stdexcept>
void f() throw(); // No deprecation warning saying you should use noexcept
instead
void g() throw(std::exception); // Errors in C++17
I would expect a deprecation warning for f.
FYI, clang's -Wdeprecated flag finds and notifies about this.
Cheers,
Romain
>From gcc-bugs-return-620630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:38:53 2018
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From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/87954] VRP can transform a * b where a,b are [0,1] to a & b
Date: Fri, 09 Nov 2018 10:38:00 -0000
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Aldy Hernandez <aldyh at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Indeed, if you compile imul() with -fdump-tree-all-details-alias -O2 and look
at the vrp1 dump, one can see:
# RANGE [0, 1] NONZERO 1
is_rec_12 = (int) _4;
...
# RANGE [0, 1] NONZERO 1
_6 = (int) _15;
# RANGE [0, 1] NONZERO 1
_7 = _6 * is_rec_12;
This pattern persists throughout the optimization pipeline, so any remaining
optimizer could potentially see the range of the operands and strength reduce
this.
What would be the best place to do this?
>From gcc-bugs-return-620631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:40:58 2018
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Subject: [Bug tree-optimization/87940] [9 Regression] FAIL: gcc.dg/warn-strlen-no-nul.c
Date: Fri, 09 Nov 2018 10:40:00 -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-620632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:41:37 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/87941] by_pieces infra does not use movmisalign optab
Date: Fri, 09 Nov 2018 10:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-620633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:43:15 2018
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Subject: [Bug c/87942] every int seems to be unaligned in packed structure
Date: Fri, 09 Nov 2018 10:43:00 -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> ---
I think the proper fix is to mark either the struct or the variable with an
appropriate align attribute.
>From gcc-bugs-return-620634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:43:59 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87943] [6.5 regression] severe regression on iso_varying_string (?)
Date: Fri, 09 Nov 2018 10:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that GCC 6 is no longer supported, can you check if GCC 7 or 8 are
affected by the same bug?
>From gcc-bugs-return-620635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 10:46:29 2018
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Subject: [Bug fortran/87945] [9 Regression] ICE in var_element, at fortran/decl.c:281
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug fortran/87946] [7/8/9 Regression] ICE in gfc_walk_array_ref, at fortran/trans-array.c:10506
Date: Fri, 09 Nov 2018 10:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/87952] Missed optimization for std::get_if on std::variant
Date: Fri, 09 Nov 2018 10:49:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I belive I've seen dups for this. We merely isolate those paths but do not
remove them (removing them might end up as a security issue).
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
.
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Subject: [Bug tree-optimization/87621] outer loop auto-vectorization fails for exponentiation code
Date: Fri, 09 Nov 2018 10:53:00 -0000
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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> ---
Fixed on trunk.
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Subject: [Bug tree-optimization/53947] [meta-bug] vectorizer missed-optimizations
Date: Fri, 09 Nov 2018 10:53:00 -0000
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Bug 53947 depends on bug 87621, which changed state.
Bug 87621 Summary: outer loop auto-vectorization fails for exponentiation code
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87621
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Subject: [Bug tree-optimization/87621] outer loop auto-vectorization fails for exponentiation code
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 9 10:53:31 2018
New Revision: 265959
URL: https://gcc.gnu.org/viewcvs?rev=265959&root=gcc&view=rev
Log:
2018-11-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/87621
* tree-vect-loop.c (vectorizable_reduction): Handle reduction
op with only phi inputs.
* tree-ssa-loop-ch.c: Include tree-ssa-sccvn.h.
(ch_base::copy_headers): Run CSE on copied loop headers.
(pass_ch_vect::process_loop_p): Simplify.
* g++.dg/vect/pr87621.cc: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/vect/pr87621.cc
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-ch.c
trunk/gcc/tree-vect-loop.c
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87943] [6 regression] severe regression on iso_varying_string (?)
Date: Fri, 09 Nov 2018 11:04:00 -0000
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--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Yep, I know that 6 is no longer supported. Nevertheless
I wanted to at least report that bug. It is only in 6.5 ,
7/8/9 are ok.
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Subject: [Bug c/87953] asan: stack-buffer-overflow in vectorizable_reduction
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2018-11-09
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
valgrind reports
==21312== Conditional jump or move depends on uninitialised value(s)
==21312== at 0x14BB78D: vectorizable_condition(_stmt_vec_info*,
gimple_stmt_iterator*, _stmt_vec_info**, tree_node*, int, _slp_tree*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*) (tree-vect-stmts.c:8718)
==21312== by 0x14DCDC0: vectorizable_reduction(_stmt_vec_info*,
gimple_stmt_iterator*, _stmt_vec_info**, _slp_tree*, _slp_instance*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*) (tree-vect-loop.c:6531)
so that's probably the very same thing. reduc_index is -1 here.
I have a fix.
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From: "johannes.vetter@dom-sicherheitstechnik.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87942] every int seems to be unaligned in packed structure
Date: Fri, 09 Nov 2018 11:06:00 -0000
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--- Comment #3 from Johannes Vetter <johannes.vetter@dom-sicherheitstechnik.de> ---
Ok, thanks a lot.
I haven't expected that an initializer could change the alignment of a
variable. "-fno-common" does not work in my case (perhaps because the variable
already has a attribute "section").
If i set the alignment of the variable AND the exported variable in the header
file, it works fine.
My problem now: in how many other cases is the same behavior? I cannot check
every global variable/struct by hand.
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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/87954] VRP can transform a * b where a,b are [0,1] to a & b
Date: Fri, 09 Nov 2018 11:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87954
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Aldy Hernandez from comment #1)
> Indeed, if you compile imul() with -fdump-tree-all-details-alias -O2 and
> look at the vrp1 dump, one can see:
>
> # RANGE [0, 1] NONZERO 1
> is_rec_12 = (int) _4;
> ...
> # RANGE [0, 1] NONZERO 1
> _6 = (int) _15;
> # RANGE [0, 1] NONZERO 1
> _7 = _6 * is_rec_12;
>
> This pattern persists throughout the optimization pipeline, so any remaining
> optimizer could potentially see the range of the operands and strength
> reduce this.
>
> What would be the best place to do this?
The best place to do this is a pattern in match.pd
(simplify (mult @1 @2)
(if (INTEGRAL_TYPE_P (type)
&& wi::eq_p (get_nonzero_bits (@1), wi::one (TYPE_PRECISION (type))
&& wi::eq_p (get_nonzero_bits (@2), wi::one (TYPE_PRECISION (type)))
(and @1 @2))
maybe even think of tricks like requiring only one operand to be [0,1]
and sign-extending that from bit 0 before the and? Thus [0,1] * b
-> (a ? -1 : 0) & b. But that's probably sth to do at RTL expansion time
because it depends on costs to do the sign extension.
if nonzero-bits is 2 then we can do b + (a == 2 ? 1 : -1) * b. Thus
transfer the bit to the sign bit and do an add. This is similarly sth
for RTL expansion. I guess any power-of-two or zero duality can be
optimized a bit.
>From gcc-bugs-return-620646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 11:37:17 2018
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Subject: =?UTF-8?B?W0J1ZyBpcGEvODc5NTddIE5ldzogWzkgUmVncmVzc2lvbl0gSUNFIHRyZWUg?= =?UTF-8?B?Y2hlY2s6IGV4cGVjdGVkIHRyZWUgdGhhdCBjb250YWlucyDigJhkZWNsIG1p?= =?UTF-8?B?bmltYWzigJkgc3RydWN0dXJlLCBoYXZlIOKAmGlkZW50aWZpZXJfbm9kZQ==?= =?UTF-8?B?4oCZIGluIHdhcm5fb2RyLCBhdCBpcGEtZGV2aXJ0LmM6MTA1MSBzaW5jZSBy?= =?UTF-8?B?MjY1NTE5?Date: Fri, 09 Nov 2018 11:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87957
Bug ID: 87957
Summary: [9 Regression] ICE tree check: expected tree that
contains ‘decl minimal’ structure, have
‘identifier_node’ in warn_odr, at ipa-devirt.c:1051
since r265519
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Following is causing a new ICE:
$ cat 1.ii
typedef struct {
int a;
} YYSTYPE;
union yyalloc {
short yyss;
YYSTYPE yyvs;
};
void b() { yyalloc c; }
$ cat 2.ii
typedef struct YYSTYPE {
} YYSTYPE;
union yyalloc {
short yyss;
YYSTYPE yyvs;
};
void a() { yyalloc b; }
$ g++ -flto [12].ii
1.ii:3:3: warning: type ‘struct YYSTYPE’ violates the C++ One Definition Rule
[-Wodr]
3 | } YYSTYPE;
| ^
lto1: internal compiler error: tree check: expected tree that contains ‘decl
minimal’ structure, have ‘identifier_node’ in warn_odr, at ipa-devirt.c:1051
0x6b540e tree_contains_struct_check_failed(tree_node const*,
tree_node_structure_enum, char const*, int, char const*)
../../gcc/tree.c:9790
0x614bd4 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
../../gcc/tree.h:3268
0x614bd4 warn_odr
../../gcc/ipa-devirt.c:1051
0xa01c9e type_variants_equivalent_p
../../gcc/ipa-devirt.c:651
0xa07f68 odr_subtypes_equivalent_p
../../gcc/ipa-devirt.c:697
0xa08faa odr_types_equivalent_p
../../gcc/ipa-devirt.c:1576
0xa05ea4 add_type_duplicate
../../gcc/ipa-devirt.c:1878
0xa05ea4 get_odr_type(tree_node*, bool)
../../gcc/ipa-devirt.c:2058
0x7894d6 lto_read_decls
../../gcc/lto/lto.c:1900
0x78a78e lto_file_finalize
../../gcc/lto/lto.c:2134
0x78a78e lto_create_files_from_ids
../../gcc/lto/lto.c:2144
0x78a78e lto_file_read
../../gcc/lto/lto.c:2185
0x78a78e read_cgraph_and_symbols
../../gcc/lto/lto.c:2865
0x78a78e lto_main()
../../gcc/lto/lto.c:3401
>From gcc-bugs-return-620648-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 11:43:55 2018
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Subject: [Bug testsuite/87958] New: scan-tree-dump-times vs. (foo|bar)
Date: Fri, 09 Nov 2018 11:43:00 -0000
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Bug ID: 87958
Summary: scan-tree-dump-times vs. (foo|bar)
Product: gcc
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Anyone knows why (foo|bar) works for e.g. scan-tree-dump, but not for
scan-tree-dump-times?
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-optimized" } */
/* { dg-final { scan-tree-dump "call(123|456)fn" "optimized" } } */
/* { dg-final { scan-tree-dump-times "call(123|456)fn" 1 "optimized" } } */
void call123fn (void);
void
baz (void)
{
call123fn ();
}
fails the scan-tree-dump-times test, but succeeds scan-tree-dump, even when
there is just one such call in the dump. Surprisingly it succeeds if I change
the 1 to 2. Are ()s in scan-tree-dump-times unsupported, or does one need to
adjust the count, so that it is not the number of times the whole string
matched, but number of times the whole string as well as any of those ()s
matched? So e.g.
/* { dg-final { scan-tree-dump-times "b(a|b)z" 6 "optimized" } } */
succeeds on the testcase, because there are 3 baz strings and no bbz strings in
the dump.
>From gcc-bugs-return-620647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 11:43:53 2018
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-11-9
Known to work| |8.2.0
Target Milestone|--- |9.0
Known to fail| |9.0
>From gcc-bugs-return-620649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 12:07:19 2018
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch for it, let me take it.
>From gcc-bugs-return-620650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 12:13:48 2018
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87867] [7/8 regression] ICE on virtual destructor (-mlong-calls -ffunction-sections) on arm-none-eabi
Date: Fri, 09 Nov 2018 12:13:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-09
CC| |ebotcazou at gcc dot gnu.org
Target Milestone|--- |7.4
Summary|ICE on virtual destructor |[7/8 regression] ICE on
|(-mlong-calls |virtual destructor
|-ffunction-sections) on |(-mlong-calls
|arm-none-eabi |-ffunction-sections) on
| |arm-none-eabi
Ever confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Right, as you found you it was fixed by:
2018-09-26 Eric Botcazou <ebotcazou@adacore.com>
* config/arm/arm.c (arm_reorg): Skip Thumb reorg pass for thunks.
(arm32_output_mi_thunk): Deal with long calls.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86997
Jan Engelhardt <jengelh at inai dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jengelh at inai dot de
--- Comment #4 from Jan Engelhardt <jengelh at inai dot de> ---
>Is it trying to construct an 'a' object and pass that to the NoDestructor? Or just default construct the NoDestructor object?
As I read it, it's definitely the 1-arg form (always), not the default ctor.
auto a = NoDestructor(); // NoDestructor a;
auto b = NoDestructor{}; // NoDestructor b{};
auto c = NoDestructor({}); // NoDestructor c({});
auto d = NoDestructor{{}}; // NoDestructor d{{}};
The actual chromium code is something like
template<typename T> class NoDestructor { ... }
and is used as
NoDestructor<std::set<std::string>> google_tlds({"foo"});
which means ({}), if it appears, was intended to mean the empty set, and this
empty set is passed as the first and only parameter to the NoDestructor 1-arg
ctor.
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Subject: [Bug c/87953] asan: stack-buffer-overflow in vectorizable_reduction
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c/87953] asan: stack-buffer-overflow in vectorizable_reduction
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov 9 12:29:51 2018
New Revision: 265964
URL: https://gcc.gnu.org/viewcvs?rev=265964&root=gcc&view=rev
Log:
2018-11-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/87953
* tree-vect-loop.c (vectorizable_reduction): For analysis
always pass ops[0] to vectorizable_condition.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-vect-loop.c
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Subject: [Bug testsuite/87958] scan-tree-dump-times vs. (foo|bar)
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I guess we are supposed to use non-capturing groups, i.e. (?:123|456)
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/87959] New: ICE in tree check: expected enumeral_type, have record_type in free_enum_values, at ipa-devirt.c:2265
Date: Fri, 09 Nov 2018 12:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87959
Bug ID: 87959
Summary: ICE in tree check: expected enumeral_type, have
record_type in free_enum_values, at ipa-devirt.c:2265
Product: gcc
Version: 9.0
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The ICE is as old as -Wodr warning:
$ cat a.ii
enum Type {};
void a(Type) {}
$ cat b.ii
struct Type;
void a(Type *) {}
$ g++ [ab].ii -flto
a.ii:1:6: warning: type ‘Type’ violates the C++ One Definition Rule [-Wodr]
1 | enum Type {};
| ^
lto1: note: a different type is defined in another translation unit
during IPA pass: pure-const
lto1: internal compiler error: tree check: expected enumeral_type, have
record_type in free_enum_values, at ipa-devirt.c:2265
0x6c9738 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/home/marxin/Programming/gcc/gcc/tree.c:9623
0x800276 tree_check(tree_node*, char const*, int, char const*, tree_code)
/home/marxin/Programming/gcc/gcc/tree.h:3154
0xa1f582 free_enum_values
/home/marxin/Programming/gcc/gcc/ipa-devirt.c:2265
0xa1f5c5 build_type_inheritance_graph()
/home/marxin/Programming/gcc/gcc/ipa-devirt.c:2281
0xa62bb2 symbol_table::remove_unreachable_nodes(_IO_FILE*)
/home/marxin/Programming/gcc/gcc/ipa.c:310
0x79efb2 read_cgraph_and_symbols
/home/marxin/Programming/gcc/gcc/lto/lto.c:3017
0x79efb2 lto_main()
/home/marxin/Programming/gcc/gcc/lto/lto.c:3401
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Subject: [Bug testsuite/87958] scan-tree-dump-times vs. (foo|bar)
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, ok, thanks. Perhaps we should just mention it in our scan-tree-dump-times
documentation and close then.
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Subject: [Bug ipa/87959] ICE in tree check: expected enumeral_type, have record_type in free_enum_values, at ipa-devirt.c:2265
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-11-09
Known to work| |6.4.0, 7.2.0, 8.2.0, 9.0
Assignee|unassigned at gcc dot gnu.org |hubicka at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r265875, before the revision there was a different back-trace:
lto1: internal compiler error: tree check: expected record_type or union_type
or qual_union_type, have enumeral_type in add_type_duplicate, at
ipa-devirt.c:1710
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87960] New: [9 Regression] Miscompilation of 527.cam4_r benchmark from SPEC2017 w/ -O2 since r265946
Date: Fri, 09 Nov 2018 12:43:00 -0000
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Bug ID: 87960
Summary: [9 Regression] Miscompilation of 527.cam4_r benchmark
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I see:
Error with '/home/marxin/Programming/cpu2017/bin/specinvoke -d
/home/marxin/Programming/cpu2017/benchspec/CPU/527.cam4_r/run/run_peak_refrate_gcc7-m64.0000
-f compare.cmd -E -e compare.err -o compare.stdout'; no non-empty output files
exist
Command returned exit code 1
*** Miscompare of cam4_validate.txt; for details see
/home/marxin/Programming/cpu2017/benchspec/CPU/527.cam4_r/run/run_peak_refrate_gcc7-m64.0000/cam4_validate.txt.mis
$ cat
/home/marxin/Programming/cpu2017/benchspec/CPU/527.cam4_r/run/run_peak_refrate_gcc7-m64.0000/cam4_validate.txt.mis
0001: PASS: 4 points.
allow_std=0
^
'cam4_validate.txt' long
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Subject: [Bug fortran/87960] [9 Regression] Miscompilation of 527.cam4_r benchmark from SPEC2017 w/ -O2 since r265946
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.2.0
Blocks| |26163
Target Milestone|--- |9.0
Known to fail| |9.0
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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Subject: [Bug tree-optimization/87954] VRP can transform a * b where a,b are [0,1] to a & b
Date: Fri, 09 Nov 2018 12:50:00 -0000
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Marc, are you planning to implement that in the future?
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Subject: [Bug target/87867] [7/8 regression] ICE on virtual destructor (-mlong-calls -ffunction-sections) on arm-none-eabi
Date: Fri, 09 Nov 2018 12:51:00 -0000
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--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Author: ramana
Date: Fri Nov 9 12:50:51 2018
New Revision: 265965
URL: https://gcc.gnu.org/viewcvs?rev=265965&root=gcc&view=rev
Log:
[PATCH, arm] Backport -- Fix ICE during thunk generation with -mlong-calls
For Mihail Ionescu.
2018-11-09 Mihail Ionescu <mihail.ionsecu@arm.com>
PR target/87867
Backport from mainline
2018-09-17 Eric Botcazou <ebotcazou@adacore.com>
* g++.dg/other/thunk2a.C: New test.
* g++.dg/other/thunk2b.C: Likewise.
2018-11-09 Mihail Ionescu <mihail.ionescu@arm.com>
Backport from mainiline
2018-09-17 Eric Botcazou <ebotcazou@adacore.com>
* g++.dg/other/thunk2a.C: New test.
* g++.dg/other/thunk2b.C: Likewise.
* g++.dg/other/vthunk1.C: Rename as thunk1.C
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/other/thunk1.C
- copied unchanged from r265964,
branches/gcc-8-branch/gcc/testsuite/g++.dg/other/vthunk1.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/other/thunk2a.C
branches/gcc-8-branch/gcc/testsuite/g++.dg/other/thunk2b.C
Removed:
branches/gcc-8-branch/gcc/testsuite/g++.dg/other/vthunk1.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/arm/arm.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/87954] VRP can transform a * b where a,b are [0,1] to a & b
Date: Fri, 09 Nov 2018 12:56:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #3)
> Marc, are you planning to implement that in the future?
Not in the near future, no. It is all yours if you want it ;-)
>From gcc-bugs-return-620663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 13:09:11 2018
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/87955] [9 Regression] ICE in cl_target_option_print_diff at gcc/options-save.c:3803 since r265920
Date: Fri, 09 Nov 2018 13:09:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-11-09
Assignee|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Sorry about that. Confirmed; I'm working on a fix.
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |hubicka at gcc dot gnu.org
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
There's patch candidate:
diff --git a/gcc/ipa-devirt.c b/gcc/ipa-devirt.c
index 4676bdbdf93..71cd35caf0c 100644
--- a/gcc/ipa-devirt.c
+++ b/gcc/ipa-devirt.c
@@ -1048,7 +1048,11 @@ warn_odr (tree t1, tree t2, tree st1, tree st2,
}
else
return;
- inform (DECL_SOURCE_LOCATION (decl2), reason);
+
+ location_t loc = (TYPE_NAME (t1) && TREE_CODE (TYPE_NAME (t1)) == TYPE_DECL
+ ? DECL_SOURCE_LOCATION (TYPE_NAME (t1))
+ : UNKNOWN_LOCATION);
+ inform (loc, reason);
if (warned)
*warned = true;
But now I see repeated Wodr:
$ g++ -flto [12].ii -shared
1.ii:3:3: warning: type ‘struct YYSTYPE’ violates the C++ One Definition Rule
[-Wodr]
3 | } YYSTYPE;
| ^
1.ii:3:3: note: a type with different alignment is defined in another
translation unit
1.ii:4:7: warning: type ‘union yyalloc’ violates the C++ One Definition Rule
[-Wodr]
4 | union yyalloc {
| ^
1.ii:4:7: note: a different type is defined in another translation unit
1.ii:6:11: note: the first difference of corresponding definitions is field
‘yyvs’
6 | YYSTYPE yyvs;
| ^
1.ii:4:7: note: a field of same name but different type is defined in another
translation unit
4 | union yyalloc {
| ^
1.ii:3:3: note: type ‘struct YYSTYPE’ itself violates the C++ One Definition
Rule
3 | } YYSTYPE;
| ^
1.ii:3:3: warning: type ‘struct YYSTYPE’ violates the C++ One Definition Rule
[-Wodr]
2.ii:1:16: note: a different type is defined in another translation unit
1 | typedef struct YYSTYPE {
| ^
1.ii:2:7: note: the first difference of corresponding definitions is field ‘a’
2 | int a;
| ^
1.ii:3:3: note: a type with different number of fields is defined in another
translation unit
3 | } YYSTYPE;
| ^
Leaving to Honza.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87942] every int seems to be unaligned in packed structure
Date: Fri, 09 Nov 2018 13:27:00 -0000
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--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
(In reply to Johannes Vetter from comment #3)
> My problem now: in how many other cases is the same behavior? I cannot check
> every global variable/struct by hand.
I recommend to open a new bugreport for this aspect (diagnostics enhancement).
There's -Wpacked-not-aligned now, but it doesn't capture this specific issue.
Why was it necessary to use a packed struct for device memory at all?
>From gcc-bugs-return-620666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 13:50:48 2018
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Subject: [Bug middle-end/35903] false Warray-bounds warning when passing quoted string to function strcmp(arg,"no");
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--- Comment #11 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #4)
> (In reply to comment #3)
> > This bug has no changed for months, I think it is still active.
>
> Newer higher priority bugs often make us forget about old inactive bugs.
> Going through old bugs and testing whether they still exist in a recent GCC
> would be extremely helpful.
>
This is what I've been doing ever since I got my bugzilla account
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #1)
> This is a bug yes, but it won't get fixed unless someone that cares about it
> steps up to fix it.
I'd do this but I don't know the Ada FE well enough since I never build it
>From gcc-bugs-return-620668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 14:12:45 2018
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Subject: [Bug c++/79605] attribute [[noreturn]] accepted in explicit instantiation directives
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing C++ FE maintainers
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Subject: [Bug tree-optimization/80512] missing -Wformat-overfow on a numbered directive with width specified by "*m$"
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-620670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 14:20:02 2018
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Subject: [Bug tree-optimization/80936] bcmp, bcopy, and bzero not declared nonnull
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ghazi at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Comment in builtins.def says:
/* bcmp, bcopy and bzero have traditionally accepted NULL pointers
when the length parameter is zero, so don't apply attribute "nonnull". */
svn blame says Kaveh Ghazi wrote that comment; cc-ing him
>From gcc-bugs-return-620671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 14:23:04 2018
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Subject: [Bug target/81585] fastcall/stdcall attribute conflict not detected on distinct declarations of the same function
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |hubicka at gcc dot gnu.org,
| |ubizjak at gmail dot com
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing i386 maintainers
>From gcc-bugs-return-620672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 14:28:14 2018
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From: "eugvelesevich at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87961] New: crash at goto label inside sizeof
Date: Fri, 09 Nov 2018 14:28:00 -0000
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Bug ID: 87961
Summary: crash at goto label inside sizeof
Product: gcc
Version: 9.0
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source.cpp:
int main() {
sizeof(({M:0;}));
goto M;
}
output:
In function ‘int main()’:
<source>:1:5: internal compiler error: Segmentation fault
int main() {
^~~~
Code is a little strange... clang gets sigsegv too :)
>From gcc-bugs-return-620673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 14:41:42 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/87892] [9 Regression]: libsanitizer fails to build on CentOS 5.11 (glibc 2.5)
Date: Fri, 09 Nov 2018 14:41:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-620674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 14:47:39 2018
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 14:47:00 -0000
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--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Seems like a potential opportunity for shrink-wrap separate on the CRs. I'm
not sure whether that's implemented yet.
>From gcc-bugs-return-620675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 16:35:47 2018
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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87787] [9 Regression][UBSAN] runtime error: null pointer passed as argument 2, which is declared to never be null
Date: Fri, 09 Nov 2018 16:35:00 -0000
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Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |burnus at gcc dot gnu.org
Summary|[9 Regression] runtime |[9 Regression][UBSAN]
|error: null pointer passed |runtime error: null pointer
|as argument 2, which is |passed as argument 2, which
|declared to never be null |is declared to never be
| |null
--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #2)
> (In reply to Marc Glisse from comment #1)
> > That would be my recent commit. We will probably need to add if(size!=0) in
> > front of the call to memmove...
>
> That's what we already do in stl_algobase.h and fstream.tcc. I notice that
> we do not do it in char_traits.h for the generic version (we do for each
> specialization). I don't know if memcpy in locale_facets.h is safe either.
As that comment talks about char_traits.h, only, it is not clear whether the
following would be covered by the fix as well or not. In any case, the
following is a simple reproducer:
#include <vector>
int main() {
int *ip = NULL;
std::vector<int*> vec;
vec.push_back(ip);
return 1;
}
With gives with ubsan (-fsanitize=undefined) at run time:
stl_uninitialized.h:907:24: runtime error: null pointer passed as argument 2,
which is declared to never be null
>From gcc-bugs-return-620676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 16:43:26 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87787] [9 Regression][UBSAN] runtime error: null pointer passed as argument 2, which is declared to never be null
Date: Fri, 09 Nov 2018 16:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87787
--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #1)
> That would be my recent commit.
Namely, the commit r265485 of 2018-10-25: "Relocation (= move+destroy)"
PR libstdc++/87106
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87950] GCC warns about reaching end of non-void function when all switch cases are completely handled
Date: Fri, 09 Nov 2018 17:04:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|RESOLVED |NEW
Last reconfirmed| |2018-11-09
CC| |msebor at gcc dot gnu.org
Resolution|INVALID |---
Ever confirmed|0 |1
--- Comment #12 from Martin Sebor <msebor at gcc dot gnu.org> ---
I do agree there is room for improvement here. Consider the following test
case:
$ cat t.c && gcc -O2 -S -Wall -Wextra -Wpedantic -Wswitch-enum
-fdump-tree-optimized=/dev/stdout t.c
enum E { e0 } e;
int f (void)
{
switch (e)
case e0: return 0;
}
t.c: In function ‘f’:
t.c:7:1: warning: control reaches end of non-void function [-Wreturn-type]
7 | }
| ^
;; Function f (f, funcdef_no=0, decl_uid=1909, cgraph_uid=1, symbol_order=1)
f ()
{
E e.0_1;
<bb 2> [local count: 1073741824]:
e.0_1 = e;
if (e.0_1 == 0)
goto <bb 3>; [50.00%]
else
goto <bb 4>; [50.00%]
<bb 3> [local count: 536870913]:
return 0;
<bb 4> [local count: 536870913]:
return;
}
The -Wswitch-enum option doesn't warn about the switch statement not handling
switch values that don't correspond to any of the enumerators. To have it
diagnosed the -Wswitch-default option has to be explicitly specified (it's off
by default).
Given that, I believe the same logic should apply to the -Wreturn-type warning:
it should not trigger for the snippet above or for the test case in comment #0
unless explicitly requested somehow (perhaps it should consider
-Wswitch-default).
In addition, note the comparison to zero in the optimized GIMPLE. It's
unnecessary because the function returns no value when the value of e is
non-zero. Clang notices that and avoids the comparison. But perhaps a better
example to illustrate the missed optimization opportunity than the contrived
test case above is this:
enum E { e0, e1, e2 } e;
int f (void)
{
switch (e)
{
case e0: return 1;
case e1: return 2;
case e2: return 3;
}
}
Here, GCC also emits the same pointless comparison/branch:
f:
movl e(%rip), %eax
cmpl $2, %eax
ja .L2
addl $1, %eax
ret
.L2:
ret
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Subject: [Bug fortran/78351] comma not terminating READ of formatted input field - ok in 4.1.7, not 4.4.7- maybe related to 25419?
Date: Fri, 09 Nov 2018 17:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78351
--- Comment #25 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Fri Nov 9 17:07:39 2018
New Revision: 265976
URL: https://gcc.gnu.org/viewcvs?rev=265976&root=gcc&view=rev
Log:
2018-11-09 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from trunk
PR libfortran/78351
* io/transfer.c (read_sf_internal): Add support for early
comma termination of internal unit formatted reads.
Backported from mainline
PR libfortran/78351
* gfortran.dg/read_legacy_comma.f90: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gfortran.dg/read_legacy_comma.f90
Modified:
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/libgfortran/ChangeLog
branches/gcc-8-branch/libgfortran/io/transfer.c
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Subject: [Bug c/87795] Excessive alignment permitted for functions and labels
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--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Nov 9 17:17:47 2018
New Revision: 265977
URL: https://gcc.gnu.org/viewcvs?rev=265977&root=gcc&view=rev
Log:
PR c/87795 - Excessive alignment permitted for functions and labels
gcc/c-family/ChangeLog:
PR c/87795
* c-common.c (check_user_alignment): Use MAX_OFILE_ALIGNMENT.
gcc/testsuite/ChangeLog:
PR c/87795
* gcc.dg/attr-aligned.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/attr-aligned.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-attribs.c
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c/c-decl.c
trunk/gcc/doc/tm.texi
trunk/gcc/doc/tm.texi.in
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/87795] Excessive alignment permitted for functions and labels
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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
Known to fail| |8.2.0
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed for GCC 9 in 265977.
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Subject: [Bug fortran/78351] comma not terminating READ of formatted input field - ok in 4.1.7, not 4.4.7- maybe related to 25419?
Date: Fri, 09 Nov 2018 17:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78351
--- Comment #26 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Fri Nov 9 17:29:33 2018
New Revision: 265979
URL: https://gcc.gnu.org/viewcvs?rev=265979&root=gcc&view=rev
Log:
2018-11-09 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libfortran/78351
* io/transfer.c (read_sf_internal): Delete leftover
debug code.
Modified:
trunk/libgfortran/ChangeLog
trunk/libgfortran/io/transfer.c
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Subject: [Bug c/81824] Warn for missing attributes with function aliases
Date: Fri, 09 Nov 2018 17:33:00 -0000
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Nov 9 17:32:52 2018
New Revision: 265980
URL: https://gcc.gnu.org/viewcvs?rev=265980&root=gcc&view=rev
Log:
PR middle-end/81824 - Warn for missing attributes with function aliases
gcc/c-family/ChangeLog:
PR middle-end/81824
* c-attribs.c (handle_copy_attribute): New function.
gcc/cp/ChangeLog:
PR middle-end/81824
* pt.c (warn_spec_missing_attributes): Move code to attribs.c.
Call decls_mismatched_attributes.
gcc/ChangeLog:
PR middle-end/81824
* attribs.c (has_attribute): New helper function.
(decls_mismatched_attributes, maybe_diag_alias_attributes): Same.
* attribs.h (decls_mismatched_attributes): Declare.
* cgraphunit.c (handle_alias_pairs): Call maybe_diag_alias_attributes.
(maybe_diag_incompatible_alias): Use OPT_Wattribute_alias_.
* common.opt (-Wattribute-alias): Take an argument.
(-Wno-attribute-alias): New option.
* doc/extend.texi (Common Function Attributes): Document copy.
(Common Variable Attributes): Same.
* doc/invoke.texi (-Wmissing-attributes): Document enhancement.
(-Wattribute-alias): Document new option argument.
gcc/testsuite/ChangeLog:
PR middle-end/81824
* gcc.dg/Wattribute-alias.c: New test.
* gcc.dg/Wmissing-attributes.c: New test.
* gcc.dg/attr-copy.c: New test.
* gcc.dg/attr-copy-2.c: New test.
* gcc.dg/attr-copy-3.c: New test.
* gcc.dg/attr-copy-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wattribute-alias.c
trunk/gcc/testsuite/gcc.dg/Wmissing-attributes.c
trunk/gcc/testsuite/gcc.dg/attr-copy-2.c
trunk/gcc/testsuite/gcc.dg/attr-copy-3.c
trunk/gcc/testsuite/gcc.dg/attr-copy-4.c
trunk/gcc/testsuite/gcc.dg/attr-copy.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/attribs.c
trunk/gcc/attribs.h
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-attribs.c
trunk/gcc/cgraphunit.c
trunk/gcc/common.opt
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/doc/extend.texi
trunk/gcc/doc/invoke.texi
trunk/gcc/testsuite/ChangeLog
trunk/libgomp/libgomp.h
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87962
Bug ID: 87962
Summary: ice in vect_get_vec_def_for_operand_1, at
tree-vect-stmts.c:1485
Product: gcc
Version: 8.0
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 code:
int a, b;
int c() {
long d, e;
while (a) {
a++;
b = 0;
for (; b++ - 2; d = d >> 1)
e += d;
}
return e;
}
compiled by recent gcc trunk and flags -O3 -march=native, does this:
bug474.c:4:5: internal compiler error: in vect_get_vec_def_for_operand_1, at
tree-vect-stmts.c:1485
This code used to work at revision 265846, but fails at revision 265907.
/proc/cpuinfo says
vendor_id : AuthenticAMD
cpu family : 21
model : 2
model name : AMD FX(tm)-8350 Eight-Core Processor
>From gcc-bugs-return-620684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 17:48:30 2018
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Subject: [Bug c/87962] ice in vect_get_vec_def_for_operand_1, at tree-vect-stmts.c:1485
Date: Fri, 09 Nov 2018 17:48:00 -0000
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
svn blame says
263129 rsandifo gcc_assert (vec_stmt_info);
>From gcc-bugs-return-620685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 17:49:25 2018
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/18501] [7/8/9 Regression] Missing 'used uninitialized' warning (CCP)
Date: Fri, 09 Nov 2018 17:49:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #88 from Eric Gallager <egallager at gcc dot gnu.org> ---
This came up again on the gcc-help mailing list here:
https://gcc.gnu.org/ml/gcc-help/2018-11/msg00007.html
>From gcc-bugs-return-620686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 17:56:07 2018
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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++/85930] [8/9 Regression] Misaligned reference created in shared_ptr_base.h with -fno-rtti
Date: Fri, 09 Nov 2018 17:56:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
URL| |https://bugzilla.redhat.com
| |/show_bug.cgi?id=1643318
Resolution|FIXED |---
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang's UBsan still complains about this, because the object at the type-punned
address is not large enough to be a type_info.
>From gcc-bugs-return-620687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 18:11:51 2018
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Subject: [Bug c/81824] Warn for missing attributes with function aliases
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Target Milestone|--- |9.0
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--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
Committed in r265980.
>From gcc-bugs-return-620688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 18:29:48 2018
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Subject: [Bug libstdc++/87520] [8/9 Regression] ODR violations in std::make_shared when mixing -fno-rtti and -frtti
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> @@ -513,7 +512,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
> alignas(type_info) static constexpr _Sp_make_shared_tag __tag;
This needs to be fixed to have the right size as well as alignment, so the
reference binds to suitable storage (as per core DR 453).
>From gcc-bugs-return-620689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 18:41:36 2018
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 18:41:00 -0000
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--- Comment #5 from meissner at linux dot ibm.com ---
On Fri, Nov 09, 2018 at 02:28:28AM +0000, bergner at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87949
>
> --- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> ---
> What do you think we can do about that? The call clobbers the ABI defined
> non-volatile CR regs, so we have to save/restore them. I don't think we have
> any other option, other than telling GCC to never use the non-volatile CR regs
> so they never have to be saved/restored. Does using -ffixed-cr2 -ffixed-cr3
> -ffixed-cr4 help?
I should clarify what I would like. Yes, if the compiler needs to preserve the
CRs the current code works. But it would be helpful if instead of trying to
preserve the CR across calls, that we re-do the initial comparison, instead of
trying to keep the CR live for so long.
>From gcc-bugs-return-620690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 18:43:25 2018
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 18:43:00 -0000
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--- Comment #6 from meissner at linux dot ibm.com ---
On Fri, Nov 09, 2018 at 02:47:31PM +0000, wschmidt at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87949
>
> --- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
> Seems like a potential opportunity for shrink-wrap separate on the CRs. I'm
> not sure whether that's implemented yet.
Not really, since shrink wrap only occurs if the program has an early exit
condition. In this case, I don't think it is early exit, but instead the
compiler is just lengthening the lifetime of the CR and moving it out of loops,
etc.
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc |powerpc-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-09
Ever confirmed|0 |1
--- Comment #7 from David Edelsohn <dje at gcc dot gnu.org> ---
This sounds like the general problem of the first RA pass creating excessively
long live ranges.
Does GCC know how to re-materialize a comparison?
>From gcc-bugs-return-620692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 18:52:01 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Fri, 09 Nov 2018 18:52:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Vitali from comment #0)
> If a function has a single switch statement that handles all enum values &
> returns a value GCC will warn about the function not returning a value
> whereas clang does not. GCC requires an explicit __builtin_unreachable()
> annotation after the switch. As of C++17 it seems to now be undefined
> behaviour rather than unspecified behaviour for an enum to have a value
> that's not enumerated.
No, that's not what the defect report says. I wish this myth would die.
Outside the range of the enumerated values does not mean not enumerated.
Given enum E { e0=0, e10=7 } there is nothing undefined about E(1) or E(4).
> http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1766
>
> > cat test.c
>
> enum Enum {
> A,
> B,
> };
>
> int CoverMyBases(enum Enum x) {
> switch (x) {
> case A:
> return 1;
> case B:
> return 0;
> }
> }
>
> int main(int argc, const char **argv) {
> CoverMyBases(A);
> CoverMyBases(B);
> return 0;
> }
>
> > g++-8 -Wall --std=c++17 test.c
>
> test.c: In function 'CoverMyBases':
> test.c:16:1: warning: control reaches end of non-void function
> [-Wreturn-type]
> }
> ^
This is what -fstrict-enums is for.
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
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--- Comment #4 from Vitali <vlovich at gmail dot com> ---
Is there a way to annotate a specific enum as strict?
>From gcc-bugs-return-620694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 19:42:16 2018
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Subject: [Bug fortran/87960] [9 Regression] Miscompilation of 527.cam4_r benchmark from SPEC2017 w/ -O2 since r265946
Date: Fri, 09 Nov 2018 19:42:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |tkoenig at gcc dot gnu.org
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--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
From the description, this should be fixed with r265979.
Is that the case?
>From gcc-bugs-return-620695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 19:57:58 2018
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
Date: Fri, 09 Nov 2018 19:57:00 -0000
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--- Comment #5 from Vitali <vlovich at gmail dot com> ---
Jonathan, I think the defect report here does actually apply to this example. I
agree the argument could be made that if there's gaps in the enum values that
it's arguable that the current GCC behaviour is standards compliant (clearly
clang & GCC disagree on this for both C & C++ so unclear who's right or wrong
in their interpretation of what's allowed).
However, in the example posted this is a "dense" enum. There's no integer value
possible that's not outside the range & yet GCC still continues to treat that
as a possibility & thus missing optimization opportunities & generating
false-positive warnings.
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 20:05:00 -0000
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Bill Schmidt from comment #4)
> Seems like a potential opportunity for shrink-wrap separate on the CRs. I'm
> not sure whether that's implemented yet.
It isn't; there are some technical problems to implement it. Nothing that
cannot be overcome though.
The benefit wouldn't be huge; a much bigger benefit can be had by not using
non-volatile CR fields in the first place.
>From gcc-bugs-return-620697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 20:09:43 2018
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
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--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to meissner from comment #6)
- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
> > Seems like a potential opportunity for shrink-wrap separate on the CRs. I'm
> > not sure whether that's implemented yet.
>
> Not really, since shrink wrap only occurs if the program has an early exit
> condition.
Separate shrink-wrapping can help in all cases where not all saves or restores
are needed on every path through the function, not just in cases where on some
path through the function *no* save/restore is needed.
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Subject: [Bug c++/87951] GCC warns about reaching end of non-void function when all switch is completely handled
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Vitali from comment #5)
> Jonathan, I think the defect report here does actually apply to this
> example.
I didn't say otherwise.
> I agree the argument could be made that if there's gaps in the enum
> values that it's arguable that the current GCC behaviour is standards
> compliant (clearly clang & GCC disagree on this for both C & C++ so unclear
> who's right or wrong in their interpretation of what's allowed).
No, it has nothing to do with "gaps" in the enum. This is a myth.
All that matters is the range of representable values, which (for an
enumeration without a fixed underlying type) depends on the number of bits
required to represent the minimum and maximum enumerator values. It doesn't
make any difference whatsoever whether there are "gaps" between those minimum
and maximum
values.
> However, in the example posted this is a "dense" enum.
What matters is that all the values of the enum can be represented in a single
bit, and so the only valid values are 0 and 1, which happen to have
enumerators. But the only valid values would still be 0 and 1 if your enum was
defined as
enum Enum { B=1 }; and so a switch that failed to handle the possibility of
Enum(0) would be wrong (even with -fstrict-enums)
The mental model of "dense" vs "gaps" is WRONG.
> There's no integer
> value possible that's not outside the range & yet GCC still continues to
> treat that as a possibility & thus missing optimization opportunities &
> generating false-positive warnings.
Yes, that's what -fstrict-enums is for.
The default (without -fstrict-enums) assumes most code is buggy and doesn't
follow the rules. If you do not use values outside the valid range of values
for the enumeration, use -fstrict-enums.
I can see some value in the suggestion to annotate a specific enumeration type
as strict, but that might not be the right solution. What matters is how the
enumeration type is used (whether invalid values are ever created) and that
isn't something you can guarantee when the enum is declared.
You *can* annotate the uses of a specific enum, but telling the compiler that
no other values will ever be used in the switch, by adding:
default:
__builtin_unreachable();
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Subject: [Bug libstdc++/87787] [9 Regression][UBSAN] runtime error: null pointer passed as argument 2, which is declared to never be null
Date: Fri, 09 Nov 2018 20:14:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Fri Nov 9 20:14:07 2018
New Revision: 265984
URL: https://gcc.gnu.org/viewcvs?rev=265984&root=gcc&view=rev
Log:
PR libstdc++/87787 fix UBsan error in std::vector
PR libstdc++/87787
* include/bits/stl_uninitialized.h (__relocate_a_1): Do not call
memmove when there's nothing to copy (and pointers could be null).
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/stl_uninitialized.h
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 20:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87949
--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to David Edelsohn from comment #7)
> This sounds like the general problem of the first RA pass creating
> excessively long live ranges.
Yeah.
> Does GCC know how to re-materialize a comparison?
Not sure... Maybe secondary reloads can help?
But there also is TARGET_SELECT_EARLY_REMAT_MODES nowadays, that sounds like
just what we need here!
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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
Date: Fri, 09 Nov 2018 20:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87949
--- Comment #11 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Trying that out now.
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From: "iii at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87762] [9 Regression] extract_constrain_insn, at recog.c:2206 on s390x
Date: Fri, 09 Nov 2018 20:33:00 -0000
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--- Comment #4 from iii at gcc dot gnu.org ---
Author: iii
Date: Fri Nov 9 20:33:19 2018
New Revision: 265991
URL: https://gcc.gnu.org/viewcvs?rev=265991&root=gcc&view=rev
Log:
S/390: Allow relative addressing of literal pool entries
r265490 allowed the compiler to choose in a more flexible way whether to
use load or load-address-relative-long (LARL) instruction. When it
chose LARL for literal pool references, the latter ones were rewritten
by pass_s390_early_mach to use UNSPEC_LTREF, which assumes base register
usage, which in turn is not compatible with LARL. The end result was an
ICE because of unrecognizable insn.
UNSPEC_LTREF and friends are necessary in order to communicate the
dependency on the base register to pass_sched2. When relative
addressing is used, no base register is necessary, so in such cases the
rewrite must be avoided.
gcc/ChangeLog:
2018-11-09 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/87762
* config/s390/s390.c (s390_safe_relative_long_p): New function.
(annotate_constant_pool_refs): Skip insns which support
relative addressing.
(annotate_constant_pool_refs_1): New helper function.
(find_constant_pool_ref): Skip insns which support relative
addression.
(find_constant_pool_ref_1): New helper function.
(replace_constant_pool_ref): Skip insns which support
relative addressing.
(replace_constant_pool_ref_1): New helper function.
(s390_mainpool_start): Adapt to the new signature.
(s390_mainpool_finish): Likewise.
(s390_chunkify_start): Likewise.
(s390_chunkify_finish): Likewise.
(pass_s390_early_mach::execute): Likewise.
(s390_prologue_plus_offset): Likewise.
(s390_emit_prologue): Likewise.
(s390_emit_epilogue): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390.c
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From: "mateuszb at poczta dot onet.pl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87963] New: libstdc++-v3/src/c++17/memory_resource.cc:515:31: error: static assertion failed for mingw-w64 target since r265853
Date: Fri, 09 Nov 2018 20:35:00 -0000
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Bug ID: 87963
Summary: libstdc++-v3/src/c++17/memory_resource.cc:515:31:
error: static assertion failed for mingw-w64 target
since r265853
Product: gcc
Version: 9.0
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Priority: P3
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Reporter: mateuszb at poczta dot onet.pl
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When I build cross compiler (trunk) for mingw-w64 x86_64 target (long is
4-bytes, pointer is 8-bytes), there are errors since r265853
libtool: compile: /home/ma/m/build/bc_gcc/./gcc/xgcc -shared-libgcc
-B/home/ma/m/build/bc_gcc/./gcc -nostdinc++
-L/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/src
-L/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/src/.libs
-L/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/libsupc++/.libs
-L/home/ma/m/cross/x86_64-w64-mingw32/lib -L/home/ma/m/cross/mingw/lib -isystem
/home/ma/m/cross/x86_64-w64-mingw32/include -isystem
/home/ma/m/cross/mingw/include -B/home/ma/m/cross/x86_64-w64-mingw32/bin/
-B/home/ma/m/cross/x86_64-w64-mingw32/lib/ -isystem
/home/ma/m/cross/x86_64-w64-mingw32/include -isystem
/home/ma/m/cross/x86_64-w64-mingw32/sys-include
-I/home/ma/m/source/gcc-9/libstdc++-v3/../libgcc
-I/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/include/x86_64-w64-mingw32
-I/home/ma/m/build/bc_gcc/x86_64-w64-mingw32/libstdc++-v3/include
-I/home/ma/m/source/gcc-9/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 -g -O2 -fimplicit-templates -c
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc -o
memory_resource.o
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:515:31:
error: static assertion failed
515 | static_assert(sizeof(chunk) == (4 * sizeof(void*)), "");
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:526:48:
warning: left shift count >= width of type [-Wshift-count-overflow]
526 | static constexpr size_t all_ones = (1ul << _S_sizebits) - 1u;
| ^~~~~~~~~~~
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:526:45:
error: right operand of shift expression '(1 << 58)' is >= than the precision
of the left operand [-fpermissive]
526 | static constexpr size_t all_ones = (1ul << _S_sizebits) - 1u;
| ~~~~~^~~~~~~~~~~~~~~
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc: In member
function 'std::size_t std::pmr::{anonymous}::big_block::size() const':
/home/ma/m/source/gcc-9/libstdc++-v3/src/c++17/memory_resource.cc:548:5:
warning: control reaches end of non-void function [-Wreturn-type]
548 | }
| ^
Makefile:735: recipe for target 'memory_resource.lo' failed
make[4]: *** [memory_resource.lo] Error 1
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Subject: [Bug tree-optimization/87940] [9 Regression] FAIL: gcc.dg/warn-strlen-no-nul.c
Date: Fri, 09 Nov 2018 20:38:00 -0000
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--- Comment #2 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Author: edlinger
Date: Fri Nov 9 20:38:07 2018
New Revision: 265992
URL: https://gcc.gnu.org/viewcvs?rev=265992&root=gcc&view=rev
Log:
2018-11-09 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR tree-optimization/87940
* expr.c (string_constant): Don't strip NOPS in subexpressions.
Fold PLUS_EXPR correctly.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/expr.c
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Subject: [Bug tree-optimization/87940] [9 Regression] FAIL: gcc.dg/warn-strlen-no-nul.c
Date: Fri, 09 Nov 2018 20:39:00 -0000
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Bernd Edlinger <edlinger at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Fixed. Thanks!
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Subject: [Bug driver/41179] Documentation for "-fno-toplevel-reorder" is confusing (and wrong)
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--- Comment #4 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Fri Nov 9 20:45:06 2018
New Revision: 265993
URL: https://gcc.gnu.org/viewcvs?rev=265993&root=gcc&view=rev
Log:
2018-11-09 Sandra Loosemore <sandra@codesourcery.com>
PR driver/41179
PR middle-end/65703
gcc/
* doc/invoke.texi (Optimize Options): Clarify default behavior
for -fno-toplevel-reorder, -fno-defer-pop, and -fno-branch-count-reg.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug middle-end/65703] -fdefer-pop documentation is confusing
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--- Comment #3 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Fri Nov 9 20:45:06 2018
New Revision: 265993
URL: https://gcc.gnu.org/viewcvs?rev=265993&root=gcc&view=rev
Log:
2018-11-09 Sandra Loosemore <sandra@codesourcery.com>
PR driver/41179
PR middle-end/65703
gcc/
* doc/invoke.texi (Optimize Options): Clarify default behavior
for -fno-toplevel-reorder, -fno-defer-pop, and -fno-branch-count-reg.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug target/87221] cannot build with -pie
Date: Fri, 09 Nov 2018 20:56:00 -0000
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--- Comment #4 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Nov 9 20:55:39 2018
New Revision: 265994
URL: https://gcc.gnu.org/viewcvs?rev=265994&root=gcc&view=rev
Log:
PR target/87221
* config/netbsd-elf.h (NETBSD_STARTFILE_SPEC): Use crtbeginS.o for PIE.
(NETBSD_ENDFILE_SPEC): Use crtendS.o for PIE.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/netbsd-elf.h
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Subject: [Bug target/87221] cannot build with -pie
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
Should be fixed on the trunk.
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Subject: [Bug middle-end/65703] -fdefer-pop documentation is confusing
Date: Fri, 09 Nov 2018 20:58:00 -0000
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sandra at gcc dot gnu.org changed:
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--- Comment #4 from sandra at gcc dot gnu.org ---
I've fixed the problem with the wording of the -fno-defer-pop documentation.
The other problem raised in this issue was the difficulty in locating
documentation for the positive form -fdefer-pop. I'm going to address this in
general by adding an @opindex entry for the positive form of all "no-" options
so searching the document will at least turn up a hit in the index that will
get you to the right place.
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Subject: [Bug driver/41179] Documentation for "-fno-toplevel-reorder" is confusing (and wrong)
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sandra at gcc dot gnu.org changed:
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--- Comment #5 from sandra at gcc dot gnu.org ---
Fixed on trunk, at least for the 3 cases explicitly mentioned in this issue.
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Subject: [Bug c/87964] New: c-attribs.c:3965: possible cut'n'paste error ?
Date: Fri, 09 Nov 2018 21:28:00 -0000
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Bug ID: 87964
Summary: c-attribs.c:3965: possible cut'n'paste error ?
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Source code is
else if (!strcmp ("const", namestr))
{
if (expr && DECL_P (expr))
found_match = TREE_READONLY (expr);
}
else if (!strcmp ("const", namestr))
{
if (expr && DECL_P (expr))
found_match = DECL_PURE_P (expr);
}
svn blame says
265980 msebor else if (!strcmp ("const", namestr))
265980 msebor {
265980 msebor if (expr && DECL_P (expr))
265980 msebor found_match = TREE_READONLY (expr);
265980 msebor }
265980 msebor else if (!strcmp ("const", namestr))
265980 msebor {
265980 msebor if (expr && DECL_P (expr))
265980 msebor found_match = DECL_PURE_P (expr);
265980 msebor }
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Jeffrey A. Law <law at redhat dot com> changed:
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Subject: [Bug libstdc++/87963] libstdc++-v3/src/c++17/memory_resource.cc:515:31: error: static assertion failed for mingw-w64 target since r265853
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Subject: [Bug target/87949] PowerPC saves CR registers across calls
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Wow, this works! Mine :-)
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--- Comment #7 from Gary Mills <gary_mills at fastmail dot fm> ---
I'm still waiting for information on how to use gdb to check the alignment of
the structures involved in this ICE.
I had to RTFM and experiment. Here's the result:
$ /usr/bin/sparcv7/gdb build/sparcv7/./gcc/cc1 core
...
(gdb) bt
...
#9 <signal handler called>
#10 et_splay (occ=occ@entry=0x0)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/et-forest.c:311
#11 0x00361834 in et_set_father (t=0xeaf810, father=0xeaf808)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/et-forest.c:525
#12 0x00301e6c in calculate_dominance_info (dir=dir@entry=CDI_DOMINATORS)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/dominance.c:658
#13 0x006701cc in cleanup_tree_cfg_noloop ()
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfgcleanup.c:759
#14 cleanup_tree_cfg ()
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfgcleanup.c:818
#15 0x0066ab88 in execute_build_cfg ()
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfg.c:360
#16 (anonymous namespace)::pass_build_cfg::execute (this=<optimized out>)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfg.c:389
#17 0x0056a7e0 in execute_one_pass (pass=pass@entry=0xe30408)
---Type <return> to continue, or q <return> to quit---
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/passes.c:2336
#18 0x0056ad80 in execute_pass_list_1 (pass=0xe30408, pass@entry=0xe2e938)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/passes.c:2420
#19 0x0056ae1c in execute_pass_list (fn=0xfb410068, pass=0xe2e938)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/passes.c:2431
#20 0x002c8e18 in cgraph_node::analyze (this=this@entry=0xfb4a6000)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/cgraphunit.c:636
#21 0x002cc2b0 in analyze_functions (first_time=first_time@entry=true)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/cgraphunit.c:1086
#22 0x002cc9d0 in symbol_table::finalize_compilation_unit (this=0xfb410000)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/cgraphunit.c:2554
#23 0x006321e4 in compile_file ()
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/toplev.c:488
#24 0x00633f28 in do_compile ()
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/toplev.c:2014
---Type <return> to continue, or q <return> to quit---
#25 toplev::main (this=this@entry=0xffbff91e, argc=<optimized out>,
argc@entry=19, argv=<optimized out>, argv@entry=0xffbff984)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/toplev.c:2123
#26 0x00adcc28 in main (argc=19, argv=0xffbff984)
at
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/main.c:39
(gdb) q
So, it wasn't an alignment error after all. It was the most common thing that
causes a bus error: dereferencing a null pointer. The backtrace shows that
et_splay() was called with a NULL operand, occ. That NULL pointer was
dereferenced by this line:
311 while (occ->parent)
In et_set_father(), the et_splay() function was called with the operand rmost,
which must also be NULL.
That's the immediate cause of the ICE. I haven't identified the root cause
yet. I'm wondering, though, why the compiler built and ran on x86 hardware,
but failed on SPARC hardware. One difference is that the configuration on
SPARC hardware uses the native assembler. On x86 hardware, it uses the GNU
assembler. That's the only configuration difference. The hardware is
different, of course.
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Subject: [Bug c++/87850] Add fix-it hint for "invalid conversion from 'X' to 'X*'"
Date: Fri, 09 Nov 2018 22:38:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
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URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2018-11/msg00802.ht
| |ml
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Ever confirmed|0 |1
--- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch: https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00802.html
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Subject: [Bug c++/87947] Symbol Does Not Appear in Object File
Date: Fri, 09 Nov 2018 22:40:00 -0000
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--- Comment #2 from comm+gnu at squotd dot net ---
Thanks. I had no idea that had changed.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87965] New: [9 regression] Test cases c-c++-common/pr60226.c and gcc.dg/pr39323-1.c fail starting with r265977
Date: Fri, 09 Nov 2018 22:47:00 -0000
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Bug ID: 87965
Summary: [9 regression] Test cases c-c++-common/pr60226.c and
gcc.dg/pr39323-1.c fail starting with r265977
Product: gcc
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> FAIL: c-c++-common/pr60226.c -Wc++-compat (test for errors, line 14)
> FAIL: c-c++-common/pr60226.c -Wc++-compat (test for errors, line 8)
> FAIL: c-c++-common/pr60226.c -Wc++-compat (test for excess errors)
> FAIL: c-c++-common/pr60226.c -std=gnu++14 (test for errors, line 14)
> FAIL: c-c++-common/pr60226.c -std=gnu++14 (test for errors, line 8)
> FAIL: c-c++-common/pr60226.c -std=gnu++14 (test for excess errors)
> FAIL: c-c++-common/pr60226.c -std=gnu++17 (test for errors, line 14)
> FAIL: c-c++-common/pr60226.c -std=gnu++17 (test for errors, line 8)
> FAIL: c-c++-common/pr60226.c -std=gnu++17 (test for excess errors)
> FAIL: c-c++-common/pr60226.c -std=gnu++98 (test for errors, line 14)
> FAIL: c-c++-common/pr60226.c -std=gnu++98 (test for errors, line 8)
> FAIL: c-c++-common/pr60226.c -std=gnu++98 (test for excess errors)
> FAIL: gcc.dg/pr39323-1.c (test for errors, line 4)
> FAIL: gcc.dg/pr39323-1.c (test for errors, line 5)
> FAIL: gcc.dg/pr39323-1.c (test for excess errors)
They look like alignment errors.
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/pr60226.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -Wc++-compat -Wno-c++-compat -S -o pr60226.s
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/pr60226.c:7:1: error:
alignment of array elements is greater than element size
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/pr60226.c:8:1: error:
requested alignment '536870912' exceeds maximum 2147483648
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/pr60226.c: In function
'f':
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/pr60226.c:14:10: error:
requested alignment '536870912' exceeds maximum 2147483648
compiler exited with status 1
PASS: c-c++-common/pr60226.c -Wc++-compat (test for errors, line 7)
FAIL: c-c++-common/pr60226.c -Wc++-compat (test for errors, line 8)
FAIL: c-c++-common/pr60226.c -Wc++-compat (test for errors, line 14)
FAIL: c-c++-common/pr60226.c -Wc++-compat (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/pr60226.c:8:1: error:
requested alignment '536870912' exceeds maximum 2147483648
/home/seurer/gcc/gcc-trunk/gcc/testsuite/c-c++-common/pr60226.c:14:10: error:
requested alignment '536870912' exceeds maximum 2147483648
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-trunk/gcc/xgcc
-B/home/seurer/gcc/build/gcc-trunk/gcc/
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr39323-1.c
-fno-diagnostics-show-caret -fno-diagnostics-show-line-numbers
-fdiagnostics-color=never -ansi -pedantic-errors -S -o pr39323-1.s
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr39323-1.c:4:1: error:
requested alignment '536870912' exceeds object file maximum 268435456
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr39323-1.c:5:1: error:
requested alignment '536870912' exceeds maximum 2147483648
compiler exited with status 1
FAIL: gcc.dg/pr39323-1.c (test for errors, line 4)
FAIL: gcc.dg/pr39323-1.c (test for errors, line 5)
FAIL: gcc.dg/pr39323-1.c (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr39323-1.c:4:1: error:
requested alignment '536870912' exceeds object file maximum 268435456
/home/seurer/gcc/gcc-trunk/gcc/testsuite/gcc.dg/pr39323-1.c:5:1: error:
requested alignment '536870912' exceeds maximum 2147483648
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Subject: [Bug libfortran/87966] New: [9 regression] The SPEC2006 tests 416.gamess and 481.wrf fail starting with r265946
Date: Fri, 09 Nov 2018 22:55:00 -0000
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Bug ID: 87966
Summary: [9 regression] The SPEC2006 tests 416.gamess and
481.wrf fail starting with r265946
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The test trigger some floating point exceptions when they are run after being
compiler with gcc built from r265946.
/home/seurer/gcc/cpu2006/bin/specinvoke -E -d
/home/seurer/gcc/cpu2006/benchspec/CPU2006/416.gamess/run/run_base_ref_ppc64.0018
-c 1 -e compare.err -o compare.stdout -f compare.cmd
****************************************
Contents of h2ocu2+.gradient.err
****************************************
Note: The following floating-point exceptions are signalling:
IEEE_UNDERFLOW_FLAG
****************************************
****************************************
Contents of triazolium.err
****************************************
Note: The following floating-point exceptions are signalling: IEEE_INVALID_FLAG
****************************************
------------------------------------------------------------------------
r265946 | jvdelisle | 2018-11-08 20:46:03 -0600 (Thu, 08 Nov 2018) | 7 lines
2018-11-08 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libfortran/78351
* io/transfer.c (read_sf_internal): Add support for early
comma termination of internal unit formatted reads.
* gfortran.dg/read_legacy_comma.f90: New test.
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Subject: [Bug c++/87967] New: ice in slpeel_duplicate_current_defs_from_edges
Date: Fri, 09 Nov 2018 22:55:00 -0000
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Bug ID: 87967
Summary: ice in slpeel_duplicate_current_defs_from_edges
Product: gcc
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For this C++ code:
void h();
template <typename b> struct k { using d = b; };
template <typename b, template <typename> class> using e = k<b>;
template <typename b, template <typename> class f>
using g = typename e<b, f>::d;
struct l {
template <typename i> using ab = typename i::j;
};
struct n : l {
using j = g<char *, ab>;
};
class o {
public:
long r();
};
char m;
char s() {
if (m)
return '0';
return 'A';
}
class t {
public:
typedef char *ad;
ad m_fn2();
};
void fn3() {
char *a;
t b;
bool p = false;
while (*a) {
h();
o c;
if (*a)
a++;
if (c.r()) {
n::j q;
for (t::ad d = b.m_fn2(), e; d != e; d++) {
char f = *q;
*d = f + s();
}
p = true;
}
}
if (p)
throw;
}
compiled with recent gcc trunk and compiler flag -O3, does this:
during GIMPLE pass: vect
bug476.cc: In function ‘void fn3()’:
bug476.cc:27:6: internal compiler error: Segmentation fault
27 | void fn3() {
| ^~~
0xfa4967 crash_signal
../../trunk/gcc/toplev.c:325
0x12185e4 contains_struct_check(tree_node*, tree_node_structure_enum, char
const
*, int, char const*)
../../trunk/gcc/tree.h:3267
0x12185e4 slpeel_duplicate_current_defs_from_edges
../../trunk/gcc/tree-vect-loop-manip.c:985
The bug seems to have appeared between revision 265790 and 265846.
>From gcc-bugs-return-620722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 23:13:30 2018
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Subject: [Bug testsuite/87965] [9 regression] Test cases c-c++-common/pr60226.c and gcc.dg/pr39323-1.c fail starting with r265977
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-09
Component|c |testsuite
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The failures are due to changing the text of the warning. Somehow
I missed them in my testing.
>From gcc-bugs-return-620723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 23:16:28 2018
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Subject: [Bug testsuite/87965] [9 regression] Test cases c-c++-common/pr60226.c and gcc.dg/pr39323-1.c fail starting with r265977
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in r265998.
>From gcc-bugs-return-620724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 23:16:49 2018
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Subject: [Bug testsuite/87965] [9 regression] Test cases c-c++-common/pr60226.c and gcc.dg/pr39323-1.c fail starting with r265977
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Nov 9 23:15:59 2018
New Revision: 265998
URL: https://gcc.gnu.org/viewcvs?rev=265998&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog:
PR testsuite/87965
* c-c++-common/pr60226.c: Adjust text of expected diagnostic.
* gcc.dg/pr39323-1.c: Ditto.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/pr60226.c
trunk/gcc/testsuite/gcc.dg/pr39323-1.c
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Subject: [Bug middle-end/87836] ICE in cc1 for gcc-6.5.0 with SPARC hardware
Date: Fri, 09 Nov 2018 23:17:00 -0000
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--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> That's the immediate cause of the ICE. I haven't identified the root cause
> yet. I'm wondering, though, why the compiler built and ran on x86 hardware,
> but failed on SPARC hardware. One difference is that the configuration on
> SPARC hardware uses the native assembler. On x86 hardware, it uses the GNU
> assembler. That's the only configuration difference.
One possibility is that the base compiler miscompiles the stage #1 compiler.
In order to rule it out, we need to make sure that the base compiler is invoked
with optimization disabled, hence my request about the flags...
>From gcc-bugs-return-620726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 09 23:25:07 2018
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Subject: [Bug libfortran/87966] [9 regression] The SPEC2006 tests 416.gamess and 481.wrf fail starting with r265946
Date: Fri, 09 Nov 2018 23:24:00 -0000
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--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
I had a leftover printf statement for debugging in the initial commit last
night which I fixed this morning.
Let me know if the problem persists. The line was:
printf("allow_std=%d\n", compile_options.warn_std);
Which would have generated some extraneous output to stdout during a read.
The patch does not touch any floating point operations.
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Subject: [Bug c/87964] c-attribs.c:3965: possible cut'n'paste error ?
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Yes, that's a cut & paste mistake, thanks. I'll take care of it.
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Subject: [Bug middle-end/87836] ICE in cc1 for gcc-6.5.0 with SPARC hardware
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--- Comment #9 from Gary Mills <gary_mills at fastmail dot fm> ---
Okay, I'm compiling it with -O0 right now. It might take a couple of days.
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Subject: [Bug other/86904] Column numbers ignore tab characters
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #2)
> (In reply to richard.earnshaw from comment #1)
> > On 09/08/18 21:08, dmalcolm at gcc dot gnu.org wrote:
> [...snip...]
> > > Maybe:
> > > -fdiagnostics-x-coord=bytes : count of bytes
> > > -fdiagnostics-x-coord=characters : count of characters (not special-casing
> > > tab)
> > > -fdiagnostics-x-coord=columns : count of columns: as per characters, but with
> > > tabs doing tabstops
> >
> > how about -fdiagnostics-x-coord=visual-[n]
> >
> > Where n is the size of a hard tab? Some folks change the tab stop to 4,
> > for example. Or maybe ...coord=tab[-n], where -n defaults to "-8".
>
> The C family of frontends already has:
> -ftabstop=<number> Distance between tab stops for column reporting.
> which IIRC is currently only used by -Wmisleading-indentation. I guess it
> could be moved to common.opt.
Yeah, using -ftabstop makes sense
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Subject: [Bug middle-end/87941] by_pieces infra does not use movmisalign optab
Date: Sat, 10 Nov 2018 06:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87941
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target| |arm*-*-*
Component|rtl-optimization |middle-end
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
by_pieces was written before movmisalign_optab even was thought of.
>From gcc-bugs-return-620731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 06:40:09 2018
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Subject: [Bug c++/87961] crash at goto label inside sizeof of a statement expression
Date: Sat, 10 Nov 2018 06:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87961
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this is a dup of bug 17913 which was fixed in the C front-end in 2005
but it was never fixed in the C++ front-end (the front-ends share some code but
not all).
>From gcc-bugs-return-620732-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 06:56:30 2018
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Subject: [Bug tree-optimization/70547] Optimize multiplication of booleans to bit_and
Date: Sat, 10 Nov 2018 06:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70547
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
/* (m1 CMP m2) * d -> (m1 CMP m2) ? d : 0 */
(for cmp (gt lt ge le)
(simplify
(mult (convert (cmp @0 @1)) @2)
(cond (cmp @0 @1) @2 { build_zero_cst (type); })))
Should have caught that ...
NOTE I think that might have been broken for floating point ....
>From gcc-bugs-return-620733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 07:01:41 2018
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Subject: [Bug tree-optimization/70547] Optimize multiplication of booleans to bit_and
Date: Sat, 10 Nov 2018 07:01:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #4)
> /* (m1 CMP m2) * d -> (m1 CMP m2) ? d : 0 */
> (for cmp (gt lt ge le)
> (simplify
> (mult (convert (cmp @0 @1)) @2)
> (cond (cmp @0 @1) @2 { build_zero_cst (type); })))
>
>
> Should have caught that ...
We do get:
_1 = c_5(D) < d_6(D);
_2 = (int) _1;
_7 = a_3(D) < b_4(D) ? _2 : 0;
>From gcc-bugs-return-620735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 07:18:36 2018
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Subject: [Bug tree-optimization/14799] [tree-ssa] convert a sequence of "if"s to a "switch" statement
Date: Sat, 10 Nov 2018 07:18:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |eyalroz at technion dot ac.il
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87925 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-620734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 07:18:34 2018
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Subject: [Bug tree-optimization/87925] [missed-optimization] Distinct-value if-then-else chains treated differently than switch statements
Date: Sat, 10 Nov 2018 07:18:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of a much older bug (PR 14799) ...
*** This bug has been marked as a duplicate of bug 14799 ***
>From gcc-bugs-return-620736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 07:23:01 2018
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Subject: [Bug tree-optimization/87245] [missed optimization] switching on indices of struct members
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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CC| |pinskia at gcc dot gnu.org
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>From gcc-bugs-return-620738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 09:01:08 2018
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
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Bug 26163 depends on bug 87960, which changed state.
Bug 87960 Summary: [9 Regression] Miscompilation of 527.cam4_r benchmark from SPEC2017 w/ -O2 since r265946
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87960
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>From gcc-bugs-return-620737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 09:01:04 2018
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Subject: [Bug fortran/87960] [9 Regression] Miscompilation of 527.cam4_r benchmark from SPEC2017 w/ -O2 since r265946
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
It's fixed, thanks for it.
>From gcc-bugs-return-620739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 09:04:36 2018
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Subject: [Bug tree-optimization/87962] [9 Regression] ICE in vect_get_vec_def_for_operand_1, at tree-vect-stmts.c:1485
Date: Sat, 10 Nov 2018 09:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87962
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-10
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Known to work| |8.2.0
Target Milestone|--- |9.0
Summary|ice in |[9 Regression] ICE in
|vect_get_vec_def_for_operan |vect_get_vec_def_for_operan
|d_1, at |d_1, at
|tree-vect-stmts.c:1485 |tree-vect-stmts.c:1485
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
One can see it with -march=bdver4, started with r265876.
>From gcc-bugs-return-620740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 09:16:22 2018
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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++/87967] [9 Regression] ICE in slpeel_duplicate_current_defs_from_edges
Date: Sat, 10 Nov 2018 09:16:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |8.2.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-11-10
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ice in |[9 Regression] ICE in
|slpeel_duplicate_current_de |slpeel_duplicate_current_de
|fs_from_edges |fs_from_edges
Target Milestone|--- |9.0
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r265812.
>From gcc-bugs-return-620741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 12:04:49 2018
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/87824] x86_64-linux multilib issues
Date: Sat, 10 Nov 2018 12:04:00 -0000
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--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Jakub Jelinek from comment #1)
> In i686-linux bootstrap/regtest, I see:
> === gdc tests ===
>
>
> Running target unix
> FAIL: runnable/cppa.d execution test
> FAIL: runnable/cppa.d -g execution test
> FAIL: runnable/cppa.d -g -shared-libphobos execution test
> FAIL: runnable/cppa.d -shared-libphobos execution test
This would be dependent on available C++ libraries I guess. I couldn't
reproduce locally, I'll try in a more controlled environment.
> FAIL: runnable/eh.d -O2 execution test
> FAIL: runnable/eh.d -O2 -shared-libphobos execution test
On x86, the EH handling is unable to determine that two independently thrown
exceptions should be chained together.
Currently this is determined by comparing the LSDA, but this doesn't work when
a function is partitioned into hot and cold blocks.
> FAIL: runnable/nulltype.d execution test
> FAIL: runnable/nulltype.d -O2 execution test
> FAIL: runnable/nulltype.d -O2 -shared-libphobos execution test
> FAIL: runnable/nulltype.d -g execution test
> FAIL: runnable/nulltype.d -g -O2 execution test
> FAIL: runnable/nulltype.d -g -O2 -shared-libphobos execution test
> FAIL: runnable/nulltype.d -g -shared-libphobos execution test
> FAIL: runnable/nulltype.d -shared-libphobos execution test
This is related to returning null associative array types - internally, a
struct{void *ptr}.
Returning {.ptr=NULL} instead of {} is enough for the unoptimized tests to
pass. For the optimized tests, also setting TYPE_TRANSPARENT_AGGR seems to be
required as well.
It does make sense as part of the D language to treat associative arrays as
just a void*, though I wouldn't know why not setting TYPE_TRANSPARENT_AGGR
would have an affect on returning {} in an apparent wrong way.
> FAIL: runnable/template1.d execution test
> FAIL: runnable/template1.d -O2 execution test
> FAIL: runnable/template1.d -O2 -frelease execution test
> FAIL: runnable/template1.d -O2 -frelease -shared-libphobos execution test
> FAIL: runnable/template1.d -O2 -shared-libphobos execution test
> FAIL: runnable/template1.d -frelease execution test
> FAIL: runnable/template1.d -frelease -shared-libphobos execution test
> FAIL: runnable/template1.d -g execution test
> FAIL: runnable/template1.d -g -O2 execution test
> FAIL: runnable/template1.d -g -O2 -frelease execution test
> FAIL: runnable/template1.d -g -O2 -frelease -shared-libphobos execution
> test
> FAIL: runnable/template1.d -g -O2 -shared-libphobos execution test
> FAIL: runnable/template1.d -g -frelease execution test
> FAIL: runnable/template1.d -g -frelease -shared-libphobos execution test
> FAIL: runnable/template1.d -g -shared-libphobos execution test
> FAIL: runnable/template1.d -shared-libphobos execution test
>
This is caused by misalignment of long. Will send a patch for this.
> FAIL: libphobos.unittests/phobos/shared/std.typecons
>
std.typecons failed for same reason as runnable/template1.d
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From: "maik.riechert at arcor dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82243] -fcheck=bounds not checking, and behaving differently with different real kinds
Date: Sat, 10 Nov 2018 15:16:00 -0000
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maik.riechert at arcor dot de changed:
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----------------------------------------------------------------------------
CC| |maik.riechert at arcor dot de
--- Comment #3 from maik.riechert at arcor dot de ---
This seems to be the same as asked at https://stackoverflow.com/q/53163843.
The minimal example from there is:
program main
implicit none
real, dimension(:), allocatable :: arr
allocate (arr(5))
! should fail, but happily writes out of bounds
call foo(arr)
contains
subroutine foo(arr)
real, dimension(10), intent(inout) :: arr
arr(10) = 42
end subroutine
end program
I tested this with gfortran 8.2.0 and it doesn't trigger a runtime error.
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Subject: [Bug fortran/87968] New: [7/8/9 Regression] Warning about uninizialized variables in array constructor
Date: Sat, 10 Nov 2018 15:25:00 -0000
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Bug ID: 87968
Summary: [7/8/9 Regression] Warning about uninizialized
variables in array constructor
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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$ cat a.f90
program main
integer, parameter :: dp = selected_real_kind(15)
real(kind=dp) :: v1(3), v2(4)
real(kind=dp), allocatable :: vv(:)
v1 = [1._dp, 2._dp, 3._dp]
v2 = [7._dp, 8._dp, 9._dp, 5._dp]
vv = [v1, v2]
print *,vv
end program main
$ gfortran -O -Wall a.f90
a.f90:7:0:
7 | vv = [v1, v2]
|
Warning: 'vv.offset' is used uninitialized in this function [-Wuninitialized]
a.f90:7:0: Warning: 'vv.dim[0].lbound' is used uninitialized in this function
[-Wuninitialized]
a.f90:7:0: Warning: 'vv.dim[0].ubound' is used uninitialized in this function
[-Wuninitialized]
$ /usr/bin/gfortran-8 -O -Wall a.f90
a.f90:7:0:
vv = [v1, v2]
Warning: 'vv.offset' is used uninitialized in this function [-Wuninitialized]
a.f90:7:0: Warning: 'vv.dim[0].lbound' is used uninitialized in this function
[-Wuninitialized]
a.f90:7:0: Warning: 'vv.dim[0].ubound' is used uninitialized in this function
[-Wuninitialized]
$ /usr/bin/gfortran-7 -O -Wall a.f90
a.f90:7:0:
vv = [v1, v2]
Warning: 'vv.offset' is used uninitialized in this function [-Wuninitialized]
a.f90:7:0: Warning: 'vv.dim[0].lbound' is used uninitialized in this function
[-Wuninitialized]
a.f90:7:0: Warning: 'vv.dim[0].ubound' is used uninitialized in this function
[-Wuninitialized]
$ /usr/bin/gfortran-6 -O -Wall a.f90
$
The warning is spurious, but there may be something wrong with the
generated code - let's see.
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From: "maik.riechert at arcor dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87969] New: -fcheck does not raise signal
Date: Sat, 10 Nov 2018 15:31:00 -0000
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Bug ID: 87969
Summary: -fcheck does not raise signal
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When compiling code with -fcheck=.. I expect that a failing runtime check would
raise a signal so that gdb stops at that point, however this is not the case
and the program just exits after printing the runtime check message.
Example program:
program main
implicit none
real, dimension(5) :: arr
arr(10) = 42.
end program
Compiled with "gfortran -g -fcheck=bounds main.F90" and run under gdb:
(gdb) run
Starting program: /.../a.out
At line 4 of file main.F90
Fortran runtime error: Index '10' of dimension 1 of array 'arr' above upper
bound of 5
Error termination. Backtrace:
#0 0x7ffffef9d37a in ???
#1 0x7ffffef9df15 in ???
#2 0x7ffffef9e2e7 in ???
#3 0x800073e in MAIN__
at /.../main.F90:4
#4 0x8000774 in main
at /.../main.F90:5
[Inferior 1 (process 29666) exited with code 02]
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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/87968] [7/8/9 Regression] Warning about uninizialized variables in array constructor
Date: Sat, 10 Nov 2018 15:36:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |9.0
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
At least valgrind disagrees about undefined values here.
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From: "ibuclaw at gdcproject dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/87824] x86_64-linux multilib issues
Date: Sat, 10 Nov 2018 15:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87824
--- Comment #4 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Iain Buclaw from comment #3)
> (In reply to Jakub Jelinek from comment #1)
> > FAIL: runnable/eh.d -O2 execution test
> > FAIL: runnable/eh.d -O2 -shared-libphobos execution test
>
> On x86, the EH handling is unable to determine that two independently thrown
> exceptions should be chained together.
>
> Currently this is determined by comparing the LSDA, but this doesn't work
> when a function is partitioned into hot and cold blocks.
>
>
Having -fno-reorder-blocks-and-partitions the default is also enough for
exception chaining to work as expected.
>From gcc-bugs-return-620747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 17:22:02 2018
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From: "bruno.manga95 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/87970] New: Template Instantiation from empty parameter pack is not diagnosed in class specialization
Date: Sat, 10 Nov 2018 17:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87970
Bug ID: 87970
Summary: Template Instantiation from empty parameter pack is
not diagnosed in class specialization
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: bruno.manga95 at gmail dot com
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The following code compiles with g++ 8.1+, but fails with all the other
compilers which claim that we are trying to pass too many template arguments to
bar.
template <class T>
struct bar {};
template <class T>
struct foo {};
template <class T, int ...args>
struct foo<bar<T, args...>> {};
godbolt link: https://gcc.godbolt.org/z/pnyPvn
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Subject: [Bug ada/87936] gnatlink fails with -pie
Date: Sat, 10 Nov 2018 18:21:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-10
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Patches welcome.
>From gcc-bugs-return-620749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 18:25:19 2018
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/87938] libgnat.a not compiled with -fno-PIC
Date: Sat, 10 Nov 2018 18:25:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-10
CC| |ebotcazou at gcc dot gnu.org
Depends on| |87936
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> But libgnat.a is compiled with whatever the default is, so if gcc defaults
> to -pie -fPIE, then libgnat.a is compiled with -fPIE. My guess is that we
> want to build libgnat.a with -fno-PIE/-fno-pie.
That's not clear to me but, in any case, this depends on the other.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87936
[Bug 87936] gnatlink fails with -pie
>From gcc-bugs-return-620750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 20:59:56 2018
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Subject: [Bug c++/87971] New: gcc allows nested namespace definition of inline namespaces
Date: Sat, 10 Nov 2018 20:59:00 -0000
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Bug ID: 87971
Summary: gcc allows nested namespace definition of inline
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gcc allows the following code with -std=c++17 without any warnings or errors
even with -Wall -Wextra -pedantic -pedantic-errors.
namespace one {
inline namespace two {}
}
namespace one::two {} // ill-formed
two is an inline namespace, so it should be specified as such.
>From gcc-bugs-return-620751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 22:26:53 2018
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Subject: [Bug c++/87971] gcc allows nested namespace definition of inline namespaces
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's also accepted without using nested namespace definitions, and that's
intentional.
namespace one {
inline namespace two {}
}
namespace one {
namespace two {}
}
>From gcc-bugs-return-620752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Nov 10 23:55:24 2018
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Subject: [Bug c++/87971] gcc allows nested namespace definition of inline namespaces
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Nicolas Lesser <blitzrakete at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Nicolas Lesser <blitzrakete at gmail dot com> ---
Ha, seems like you're right. It's just the other way that is ill-formed.
>From gcc-bugs-return-620753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 11 01:34:36 2018
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Subject: [Bug middle-end/65703] -fdefer-pop documentation is confusing
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--- Comment #5 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Sun Nov 11 01:33:53 2018
New Revision: 266008
URL: https://gcc.gnu.org/viewcvs?rev=266008&root=gcc&view=rev
Log:
2018-11-10 Sandra Loosemore <sandra@codesourcery.com>
PR middle-end/65703
gcc/
* doc/invoke.texi (Optimize Options): Add @opindex entries
for the positive forms of -fno-xxx and -mno-xxx options
that were lacking them.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug ipa/87955] [9 Regression] ICE in cl_target_option_print_diff at gcc/options-save.c:3803 since r265920
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87955
David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2018-11/msg00834.ht
| |ml
--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch: https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00834.html
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Subject: [Bug middle-end/65703] -fdefer-pop documentation is confusing
Date: Sun, 11 Nov 2018 02:36:00 -0000
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sandra at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #6 from sandra at gcc dot gnu.org ---
Now fixed on trunk.
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Subject: [Bug tree-optimization/81436] missing -Wstringop-overflow on strncat to a zero-size buffer
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |dmalcolm at gcc dot gnu.org,
| |dodji at gcc dot gnu.org
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
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Subject: [Bug d/87824] x86_64-linux multilib issues
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Johannes Pfau <johannespfau at gmail dot com> changed:
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--- Comment #5 from Johannes Pfau <johannespfau at gmail dot com> ---
Iain, is there a specific reason why we don't have i686 on the GDC/buildkite
CI? We could simply run a QEMU/KVM VM on a x86_64 host for this.
And when running the testsuite on multilib, is it now running all tests (test
suite and druntime, phobos) for all multilib variants? I think last time I
checked, multilib testing tested only the main variant for some reason.
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Subject: [Bug d/87824] x86_64-linux multilib issues
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--- Comment #6 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Johannes Pfau from comment #5)
> Iain, is there a specific reason why we don't have i686 on the GDC/buildkite
> CI? We could simply run a QEMU/KVM VM on a x86_64 host for this.
>
> And when running the testsuite on multilib, is it now running all tests
> (test suite and druntime, phobos) for all multilib variants? I think last
> time I checked, multilib testing tested only the main variant for some
> reason.
Just need to add i686 to the list of test configurations, and then adjust CI
script to run make check with
RUNTESTFLAGS="--target_board=unix/-m32/-mno-sse/-mno-mmx". This is already
done for ARM.
However... there should be more servers thrown into the build farm, and not
just Linux VPS boxes. Running QEMU probably warrants getting dedicated
hardware instead.
> Running target unix
> FAIL: runnable/cppa.d execution test
> FAIL: runnable/cppa.d -g execution test
> FAIL: runnable/cppa.d -g -shared-libphobos execution test
> FAIL: runnable/cppa.d -shared-libphobos execution test
Have now reproduced, the test checks old behaviour that I dropped support for
long ago. The first failed attempt to have a type that maps to C 'long' and
'unsigned long' had a 'struct __c_long' type that expected the compiler to
magically pass it around as the correct integer type. This had passed/gone
unnoticed on x86_64 because 'struct{long}' and 'long' are passed in the same
way.
Support should have been removed from the dmd front-end when it was dropped
from the library, but it still lives on in the testsuite.
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 44982
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44982&action=edit
Tentative fix
I'm going to evaluate it on ARM and SPARC wrt pessimization.
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44982|0 |1
is obsolete| |
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 44983
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44983&action=edit
Tentative fix #2
Second try, without the thinko of the previous patch.
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From: "nicolas at debian dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/87972] New: remove -f*-prefix-map= options from Ada Library Information files
Date: Sun, 11 Nov 2018 15:01:00 -0000
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Bug ID: 87972
Summary: remove -f*-prefix-map= options from Ada Library
Information files
Product: gcc
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Created attachment 44984
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44984&action=edit
skip -f*-prefix-map options when writing .ali files
The -f(file|debug|macro)-prefix-map=OLD=NEW options added by revision 256847
explicitly ask that OLD is never written.
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
For the testcase, the tentative fix adds only one instruction:
--- pr85925_0.s 2018-11-11 16:14:32.883280168 +0100
+++ pr85925.s 2018-11-11 16:16:34.734727859 +0100
@@ -38,6 +38,7 @@
ldreq lr, [ip]
mov r3, r0
.L5:
+ ubfx r3, r3, #0, #15
str r3, [r1]
ldr r3, [r2]
add r3, r3, #1
whereas reverting the nonzero_bits1 change of PR rtl-opt/59461 adds two:
--- pr85925_0.s 2018-11-11 16:14:32.883280168 +0100
+++ pr85925_1.s 2018-11-11 16:15:18.800577679 +0100
@@ -38,6 +38,8 @@
ldreq lr, [ip]
mov r3, r0
.L5:
+ ubfx r3, r3, #0, #15
+ uxth r3, r3
str r3, [r1]
ldr r3, [r2]
add r3, r3, #1
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Subject: [Bug fortran/87968] [7/8/9 Regression] Warning about uninizialized variables in array constructor
Date: Sun, 11 Nov 2018 16:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87968
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Simplified test case (only one array is needed):
program main
integer, parameter :: dp = selected_real_kind(15)
real(kind=dp) :: v1(3)
real(kind=dp), allocatable :: vv(:)
v1 = [1._dp, 2._dp, 3._dp]
vv = [v1]
print *,vv
end program main
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From: "cthowie at netzero dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/87973] New: ICE with pragma Discard_Names and GCC optimisation for x64
Date: Sun, 11 Nov 2018 17:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87973
Bug ID: 87973
Summary: ICE with pragma Discard_Names and GCC optimisation for
x64
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: cthowie at netzero dot net
Target Milestone: ---
Created attachment 44985
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44985&action=edit
Test.adb file; see comment for other file 'Test.gpr'
PREFACE:
1) Compiler: GNAT FSF 8.2.0 with MinGW on Windows 64-bit. I've appended the
detailed output of "gcc -v" to the end of this comment.
2) My GNAT setup is default MSYS2 based GNAT FSF on Windows 64/MinGW64. No
fiddling or manual compiling of GNAT. I have also installed the Win32Ada
library from GitHub, though there are problems even if Win32Ada ignored as I
comment on below.
3) The compiler crash and other problems reported herein do not appear to
affect x86 (32-bit) GNAT, only x64. I ran these steps below on 32-bit Windows
with MSYS2 GNAT x86 and had no problems.
TWO TEST FILES: Test.adb, Test.gpr
Although I've attached Test.adb, you can make these two files by pasting the
following text into the named files (gnatchop won't work):
------------ Test.adb ------------
with Ada.Text_IO; use Ada.Text_IO;
procedure Test
is
pragma Discard_Names;
type Name is (Alice, Bob, Charles);
n : Name := Bob;
begin
Put_Line ("Hello, " & n'Image);
end Test;
------------ Test.gpr ------------
with "win32ada";
project Test is
for Source_Dirs use (".");
for Object_Dir use "obj/";
for Main use ("Test.adb");
package Compiler is
for Switches ("Ada") use ("-O2");
end Compiler;
end Test;
------------ end of test files ------
DIAGNOSTIC STEPS:
I will describe how to generate the ICE and then some finer-grained diagnostic
steps you can use to remove the ICE but get a compiler error which I'm sure
will help home in on the bug, and then finally how to get the pragma working
even with optimisation switched on.
To generate the ICE, run 'gprbuild' for the simple test and project files I've
submitted:
gprbuild -p -d -PTest.gpr
and you get this bug box
+===========================GNAT BUG
DETECTED==============================+
| 8.2.0 (x86_64-w64-mingw32) Program_Error EXCEPTION_ACCESS_VIOLATION
|
| Error detected at test.adb:8:32
|
| Please submit a bug report; see https://gcc.gnu.org/bugs/ .
|
| Use a subject line meaningful to you and us to track the bug.
|
| Include the entire contents of this bug box in the report.
|
| Include the exact command that you entered.
|
| Also include sources listed below.
|
+==========================================================================+
The crash relates to a combination of things:
- specifying Win32Ada in the project file
- the use of pragma Discard_Names inside a procedure (not at file scope)
- the use of GCC optimisation
Yet there seems to be a non-crashing bug if we drop the Win32Ada aspect because
the compiler will produce an incorrect message unless we drop optimisation as
well. To explore this further, proceed through the following steps:
1) In the Test.gpr file, comment out or remove the first line that says "with
win32ada;" as this will prevent the compiler from crashing but will give us a
new clue by triggering an incorrect compiler error message. Note that the
Win32Ada library is not actually used in this test, it's just here because I've
stripped down the test files from a bigger project and Win32Ada may help in
diagnosing the problem. Even if you don't have the Win32Ada library installed,
you can still get problems when combining the pragma with optimisation, but the
ICE itself is related to the Win32Ada specification. So, after commenting
out/removing that "with win32ada;" line and running the same command:
gprbuild -p -d -PTest.gpr
you'll see the bug box has gone but now there's an incorrect compiler error
message (incorrect because the program is legal), and the error message itself
is suspicious in claiming an empty string is undefined:
test.adb:8:32: "" is undefined
2) Now in the Test.gpr file, comment out (or remove) the line that sets the Ada
compiler switches. The issue appears related to the use of optimisation
(whether GCC level -O1 or -O2, there's a bug somewhere). Running the same
command as before:
gprbuild -p -d -PTest.gpr
gives a successful compilation and the program runs fine, producing the desired
output:
Hello, 1
3) We can drop down to a finer diagnostic level by ignoring gprbuild and
running gnatmake directly, without the project file wrapping. Run this command:
gnatmake Test.adb -cargs -O2
and we get the earlier incorrect compiler message for Test.adb line 8 about ""
being undefined. We can get a successful compilation by turning off
optimisation e.g.,
gnatmake Test.adb -cargs -O0
or just by dropping optimisation entirely e.g.,
gnatmake Test.adb
4) Note that we can both remove the ICE and the incorrect compiler error
message, and get a successful compilation at optimisation level 2, if we do as
ff:
i) restore the Test.gpr file to reenable the optimisation switches for Ada
back to "-O2".
ii) alter Test.adb to move the pragma Discard_Names to the first line of the
file
iii) run this command as we did earlier:
gprbuild -p -d -PTest.gpr
It'll even work if you uncomment the "with win32ada;" line in the Test.gpr
file. Of course, it'll also work if you go back to gnatmake with optimisation
back on:
gnatmake Test.adb -cargs -O2
So there's clearly an issue when using pragma Discard_Names with some degree of
optimisation and where the pragma appears inside the procedure scope instead of
at the top of the file. Moreover, using "with win32ada;" in the project file
causes an actual compiler crash, not just a bad error message.
COMPILER DETAILS: output of "gcc -v":
Using built-in specs.
COLLECT_GCC=C:\MSYS2\mingw64\bin\gcc.exe
COLLECT_LTO_WRAPPER=C:/MSYS2/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-8.2.0/configure --prefix=/mingw64
--with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32
--host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
--with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include
--libexecdir=/mingw64/lib --enable-bootstrap --with-arch=x86-64
--with-tune=generic --enable-languages=ada,c,lto,c++,objc,obj-c++,fortran
--enable-shared --enable-static --enable-libatomic --enable-threads=posix
--enable-graphite --enable-fully-dynamic-string
--enable-libstdcxx-filesystem-ts=yes --enable-libstdcxx-time=yes
--disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check
--enable-lto --enable-libgomp --disable-multilib --enable-checking=release
--disable-rpath --disable-win32-registry --disable-nls --disable-werror
--disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64
--with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64
--with-pkgversion='Rev1, Built by MSYS2 project'
--with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as
--with-gnu-ld
Thread model: posix
gcc version 8.2.0 (Rev1, Built by MSYS2 project)
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Subject: [Bug c++/87974] New: ice in vect_get_vec_def_for_stmt_copy
Date: Sun, 11 Nov 2018 17:03:00 -0000
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Bug ID: 87974
Summary: ice in vect_get_vec_def_for_stmt_copy
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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For this C++ code:
struct h {
typedef int &c;
};
class i {
struct j {
using c = int *;
};
using as = j::c;
};
template <typename> class k {
public:
using as = i::as;
h::c operator[](long l) {
k<int[]>::as d = 0;
return d[l];
}
};
class : public k<int[]> {
} a;
long c, f;
void m() {
for (long b; b <= 6; b++)
for (long g; g < b; g++) {
unsigned long e = g;
c = 0;
for (; c < b; c++)
f = e >>= 1;
a[g] = f;
}
}
compiled by recent gcc trunk and compiler flag -O3, does this:
during GIMPLE pass: vect
bug477.cc: In function ‘void m()’:
bug477.cc:21:6: internal compiler error: in vect_get_vec_def_for_stmt_copy, at
t
ree-vect-stmts.c:1615
21 | void m() {
| ^
0x787b69 vect_get_vec_def_for_stmt_copy(vec_info*, tree_node*)
../../trunk/gcc/tree-vect-stmts.c:1615
0x787b69 vect_get_vec_def_for_stmt_copy(vec_info*, tree_node*)
../../trunk/gcc/tree-vect-stmts.c:1607
0x787b69 vect_get_vec_defs_for_stmt_copy(vec_info*, vec<tree_node*, va_heap,
vl_
ptr>*, vec<tree_node*, va_heap, vl_ptr>*)
../../trunk/gcc/tree-vect-stmts.c:1634
This bug seems to have started sometime between revision 265846
and 265907.
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/81436] missing -Wstringop-overflow on strncat to a zero-size buffer
Date: Sun, 11 Nov 2018 17:16:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Eric, thanks for putting so much effort into helping triage and make progress
on these bugs! FWIW, I think the diagnostic maintainers are mainly focused on
the design and implementation of diagnostic infrastructure, not so much on
deficiencies in its client code, so CC'ing them on bugs like this is probably
not going to help move them along. (I'll let David and/or Dodji correct me if
I'm wrong here.)
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372
--- Comment #42 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun Nov 11 17:36:23 2018
New Revision: 266014
URL: https://gcc.gnu.org/viewcvs?rev=266014&root=gcc&view=rev
Log:
Backport from mainline
2018-11-04 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/58372
* cfgexpand.c (pass_expand::execute): Move the call to
finish_eh_generation in front of the call to expand_stack_alignment.
testsuite/ChangeLog:
Backport from mainline
2018-11-04 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/58372
* g++.dg/pr58372.C: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/g++.dg/pr58372.C
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/cfgexpand.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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--- Comment #43 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun Nov 11 17:44:43 2018
New Revision: 266015
URL: https://gcc.gnu.org/viewcvs?rev=266015&root=gcc&view=rev
Log:
Backport from mainline
2018-11-04 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/58372
* cfgexpand.c (pass_expand::execute): Move the call to
finish_eh_generation in front of the call to expand_stack_alignment.
testsuite/ChangeLog:
Backport from mainline
2018-11-04 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/58372
* g++.dg/pr58372.C: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/pr58372.C
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/cfgexpand.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
Date: Sun, 11 Nov 2018 17:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.4
--- Comment #44 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed everywhere.
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Subject: [Bug target/87928] [7/8/9 Regression] ICE in ix86_compute_frame_layout, at config/i386/i386.c:11161 since r228607
Date: Sun, 11 Nov 2018 17:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87928
--- Comment #6 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun Nov 11 17:49:33 2018
New Revision: 266016
URL: https://gcc.gnu.org/viewcvs?rev=266016&root=gcc&view=rev
Log:
PR target/87928
* config/i386/i386.h (STACK_BOUNDARY): Use TARGET_64BIT_MS_ABI
instead of (TARGET_64BIT && ix86_abi == MS_ABI).
* config/i386/darwin.h (STACK_BOUNDARY): Ditto.
* config/i386/cygming.h (STACK_BOUNDARY): Remove.
testsuite /Changelog:
PR target/87928
* gcc.target/i386/pr87928.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr87928.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/cygming.h
trunk/gcc/config/i386/darwin.h
trunk/gcc/config/i386/i386.h
trunk/gcc/testsuite/ChangeLog
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From: "sandra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/26366] __builtin_expect needs better documentation
Date: Sun, 11 Nov 2018 18:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26366
--- Comment #6 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Sun Nov 11 18:39:10 2018
New Revision: 266017
URL: https://gcc.gnu.org/viewcvs?rev=266017&root=gcc&view=rev
Log:
2018-11-11 Sandra Loosemore <sandra@codesourcery.com>
PR c/26366
gcc/
* doc/extend.texi (Other Builtins): Document probability associated
with __builtin_expect.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/extend.texi
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Subject: [Bug c/26366] __builtin_expect needs better documentation
Date: Sun, 11 Nov 2018 18:41:00 -0000
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sandra at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #7 from sandra at gcc dot gnu.org ---
Fixed (finally) on trunk.
>From gcc-bugs-return-620773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Nov 11 18:54:27 2018
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Subject: [Bug tree-optimization/18439] vectorizer failed for vector normalization
Date: Sun, 11 Nov 2018 18:54:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2011-05-22 17:43:30 |2018-11-11
CC| |tkoenig at gcc dot gnu.org
--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Hm, the test case is no longer valid, because gcc has
gotten smart enough to remove the whole function :-)
However, removing the "static" keywords of the
three variables still shows the same problem.
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
Date: Sun, 11 Nov 2018 20:51:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
For some reason, the expansion of call in llvm::cl::parser<unsigned
int>::~parser() doesn't update x_rtl->preferred_stack_boundary. Putting a
breakpoint at expand_call, we get:
Breakpoint 6, expand_call (exp=0x7ffff0ccaaf0, target=0x0, ignore=1) at
/home/uros/gcc-svn/trunk/gcc/calls.c:3232
3232 rtx_insn *normal_call_insns = NULL;
(gdb) p x_rtl->preferred_stack_boundary
$7 = 64
(gdb) fin
Run till exit from #0 expand_call (exp=0x7ffff0ccaaf0, target=0x0, ignore=1)
at /home/uros/gcc-svn/trunk/gcc/calls.c:3232
expand_expr_real_1 (exp=0x7ffff0ccaaf0, target=0x0, tmode=E_VOIDmode,
modifier=EXPAND_NORMAL, alt_rtl=0x0,
inner_reference_p=false) at /home/uros/gcc-svn/trunk/gcc/expr.c:10947
10947 return expand_call (exp, target, ignore);
Value returned is $8 = (rtx_def *) 0x7ffff0b29490
(gdb) p x_rtl->preferred_stack_boundary
$9 = 64
The same for x86_64-linux:
Breakpoint 5, expand_call (exp=0x7ffff0cca690, target=0x0, ignore=1) at
/home/uros/gcc-svn/trunk/gcc/tree.h:3153
3153 if (TREE_CODE (__t) != __c)
(gdb) p x_rtl->preferred_stack_boundary
$12 = 64
(gdb) fin
Run till exit from #0 expand_call (exp=0x7ffff0cca690, target=0x0, ignore=1)
at /home/uros/gcc-svn/trunk/gcc/tree.h:3153
expand_expr_real_1 (exp=0x7ffff0cca690, target=0x0, tmode=E_VOIDmode,
modifier=EXPAND_NORMAL, alt_rtl=0x0,
inner_reference_p=false) at /home/uros/gcc-svn/trunk/gcc/expr.c:10947
10947 return expand_call (exp, target, ignore);
Value returned is $13 = (rtx_def *) 0x7ffff0b29490
(gdb) p x_rtl->preferred_stack_boundary
$14 = 128
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From: "sandra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/38768] -fschedule-insns documentation is wrong for x86 and some other targets
Date: Sun, 11 Nov 2018 21:28:00 -0000
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sandra at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |sandra at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #9 from sandra at gcc dot gnu.org ---
It appears that the problems with -fschedule-insns on x86 were fixed in gcc 4.5
or thereabouts. The documentation on trunk agrees with what opts.c says about
when this option is enabled, so nothing left to do here.
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
Date: Sun, 11 Nov 2018 22:29:00 -0000
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I'm running this on all archs, to see what (if anything) degrades.
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Subject: [Bug c/87975] New: Bad diagnostic context arrow emission when line contains a trigraph (-trigraphs)
Date: Sun, 11 Nov 2018 22:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87975
Bug ID: 87975
Summary: Bad diagnostic context arrow emission when line
contains a trigraph (-trigraphs)
Product: gcc
Version: 8.2.1
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Created attachment 44986
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44986&action=edit
test case source file showcasing the fault (build with -trigraphs)
When trigraphs are part of any diagnostic output message (e.g. warning, note)
and in front of the highlighted context, the highlighting and arrow of the
diagnostic message context are wrongfully shifted to the left by (trigraph
count) * 2 columns
For example, building the attached test case with `gcc -trigraphs trigraph.c`
results in:
test.c: In function ‘main’:
test.c:4:21: warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]
if(false ??!??! true) printf("warn");
^~~~~~
test.c:4:21: warning: incompatible implicit declaration of built-in function
‘printf’
test.c:4:21: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’
test.c:2:1:
+#include <stdio.h>
test.c:4:21:
if(false ??!??! true) printf("warn");
^~~~~~
^ these context markers and the associated coloring are
shifted 4 to the left, possibly because the two ??! trigraphs are condensed to
|| before the diagnostic message is generated - thereby shortening the line in
front of the marker
This is on gcc version 8.2.1 20180831 (GCC)
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Subject: [Bug libstdc++/54005] Use __atomic_always_lock_free in libstdc++ is_lock_free instead of __atomic_is_lock_free
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Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #36 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
Either I goofed on the ChangeLog markup or the hook posting bugzilla notes from
svn commits has taken some time off. Anyway, I committed the change approved
in comment #35 as r266018 (and a changelog goof in r266019). It was also
posted in <https://gcc.gnu.org/ml/libstdc++/2018-11/msg00022.html>.
As the tests I wrote have no bearing on the code change, I did not commit them.
(If you still want them committed, please tell.)
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Subject: [Bug c++/43105] Document restrictions on mixing -fno-rtti and -frtti
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--- Comment #6 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Sun Nov 11 22:46:00 2018
New Revision: 266020
URL: https://gcc.gnu.org/viewcvs?rev=266020&root=gcc&view=rev
Log:
2018-11-11 Sandra Loosemore <sandra@codesourcery.com>
PR c++/43105
gcc/
* doc/invoke.texi (C++ Dialect Options): Add warning about mixing
-frtti and -fno-rtti code.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
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Subject: [Bug c++/43105] Document restrictions on mixing -fno-rtti and -frtti
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sandra at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #7 from sandra at gcc dot gnu.org ---
Fixed on trunk.
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Subject: [Bug fortran/59537] No "Automatic array cannot have an initializer", for -finit-real without a SAVE statement present in subroutine
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Maik Riechert <maik.riechert at arcor dot de> changed:
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CC| |maik.riechert at arcor dot de
--- Comment #8 from Maik Riechert <maik.riechert at arcor dot de> ---
I'm facing the same issue using gfortran 8.2.0.
Often the intent of using -finit-real is for debugging purposes. I'd like to
use '-finit-real=snan -ffpe-trap=invalid' to help find cases where unitialized
variables/values are accidently used. However, in a bigger existing code base I
cannot use -finit-real because of the gfortran behavior described in this
issue. If for some reason -finit-real cannot be applied then there should be a
warning at most, but not an error.
Ideally, I'd also like to -finit-real initialize allocatable arrays, for the
same reasons. In my opinion, this should then happen directly after an
allocate(..) call. I have a feeling that -finit-* is too closely linked to the
allowed initializations one can do in the declarations block, however it should
be more general I think and don't have such constraints really.
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Subject: [Bug tree-optimization/86965] nios2 optimizer forgets about known upper bits of register
Date: Sun, 11 Nov 2018 23:01:00 -0000
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--- Comment #3 from Michael_S <already5chosen at yahoo dot com> ---
(In reply to sandra from comment #1)
> I'm not sure what command-line options you were using, but with -O2 the bad2
> case now generates the expected code.
>
With 8.2.0 the problem exists both with -O2 and with -Os.
So, may be, a newer version got lucky and some other change eliminated my
problem.
> Looking at the bad1 case, this is what's coming out of the tree optimizers,
> and what the back end has to deal with for RTL expansion:
>
> bad1 (const signed char * str, int * res)
> {
> int c;
> signed char _1;
> int _2;
> int _11;
> signed char _12;
> _Bool _13;
>
> <bb 2> [local count: 1073741824]:
> _1 = *str_6(D);
> c_8 = (int) _1;
> _2 = c_8 + -48;
> *res_9(D) = _2;
> _12 = _1 & -33;
> _13 = _12 == 69;
> _11 = (int) _13;
> return _11;
>
> }
>
> The code coming out of RTL expand is a mess too; there's no QImode "and"
> instruction, it can't use the SImode "andi" instruction because that it only
> accepts small unsigned constants (not -33), and then it has to sign-extend
> the QImode result it computed because the comparison instructions need
> SImode too.
>
> FWIW I think the real bug here is in the tree reassoc1 pass: it shouldn't
> attempt this optimization if there is no optab support for bitwise AND in
> the appropriate mode. So I'm reclassifying this as a tree-optimization bug
> rather than a target bug; if the maintainers dispute that, feel free to
> switch it back and I will take another look see if I can do something in the
> backend to recombine the insns.
I am not a compiler expert. Never understood functionality of each and every
gcc pass. Sorry.
The only thing I know, at least on simple targets, like Nios2, is which code I
would like for compiler to generate.
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Subject: [Bug tree-optimization/81436] missing -Wstringop-overflow on strncat to a zero-size buffer
Date: Mon, 12 Nov 2018 00:59:00 -0000
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> Eric, thanks for putting so much effort into helping triage and make
> progress on these bugs! FWIW, I think the diagnostic maintainers are mainly
> focused on the design and implementation of diagnostic infrastructure, not
> so much on deficiencies in its client code, so CC'ing them on bugs like this
> is probably not going to help move them along. (I'll let David and/or Dodji
> correct me if I'm wrong here.)
OK, would there be someone else who'd be better to ask for help for bugs in
this portion of the compiler then?
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Subject: [Bug target/87976] New: [i386] Sub-optimal code generation for _mm256_set1_epi64()
Date: Mon, 12 Nov 2018 01:38:00 -0000
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Bug ID: 87976
Summary: [i386] Sub-optimal code generation for
_mm256_set1_epi64()
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In the following code, Clang and ICC emit a very optimal function that consists
of three instructions (including the tail call). MSVC emits a pretty good
equivalent with a bit more function overhead, but no memory access
GCC emits a completely unnecessary memory access.
Code:
====
#include <immintrin.h>
#include <stdint.h>
#ifndef _MSC_VER
#define __vectorcall
#endif
void __vectorcall f(__m256i value256);
void g(uint64_t value)
{
f( _mm256_set1_epi64x(value));
}
====
Clang and ICC (optimal) output:
g:
vmovd %rdi, %xmm0
vpbroadcastq %xmm0, %ymm0
jmp f
GCC:
g:
pushq %r13
leaq 16(%rsp), %r13
andq $-32, %rsp
pushq -8(%r13)
pushq %rbp
movq %rsp, %rbp
pushq %r13
movq %rdi, -24(%rbp)
vpbroadcastq -24(%rbp), %ymm0
popq %r13
popq %rbp
leaq -16(%r13), %rsp
popq %r13
jmp f
Godbolt link for all compilers: https://gcc.godbolt.org/z/-gNvec
>From gcc-bugs-return-620787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 01:58:40 2018
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To: gcc-bugs@gcc.gnu.org
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: Mon, 12 Nov 2018 01:58:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |thiago at kde dot org
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87976 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-620786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 01:58:40 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87976] [i386] Sub-optimal code generation for _mm256_set1_epi64()
Date: Mon, 12 Nov 2018 01:58:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Resolution|INVALID |DUPLICATE
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Really a dup of bug 80820.
*** This bug has been marked as a duplicate of bug 80820 ***
>From gcc-bugs-return-620785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 01:58:17 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87976] [i386] Sub-optimal code generation for _mm256_set1_epi64()
Date: Mon, 12 Nov 2018 01:58:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
apinski@xeond:~/src/toolchain-o7$ gcc t6.c -mavx -O2 -S -o - -march=native
.file "t6.c"
.text
.p2align 4,,15
.globl g
.type g, @function
g:
.LFB4758:
.cfi_startproc
vpbroadcastq %rdi, %ymm0
jmp f@PLT
.cfi_endproc
.LFE4758:
.size g, .-g
.ident "GCC: (Ubuntu 7.3.0-16ubuntu3) 7.3.0"
.section .note.GNU-stack,"",@progbits
This is on a skylake xeond:
model name : Intel(R) Xeon(R) D-2146NT CPU @ 2.30GHz
/usr/lib/gcc/x86_64-linux-gnu/7/cc1 -quiet -v -imultiarch x86_64-linux-gnu
t6.c -march=knl -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16
-msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm -mno-lwp -mfma -mno-fma4
-mno-xop -mbmi -mno-sgx -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2 -msse4.1 -mlzcnt
-mrtm -mhle -mrdrnd -mf16c -mfsgsbase -mrdseed -mprfchw -madx -mfxsr -mxsave
-mxsaveopt -mavx512f -mno-avx512er -mavx512cd -mno-avx512pf -mno-prefetchwt1
-mclflushopt -mxsavec -mxsaves -mavx512dq -mavx512bw -mavx512vl -mno-avx512ifma
-mno-avx512vbmi -mno-avx5124fmaps -mno-avx5124vnniw -mclwb -mno-mwaitx
-mno-clzero -mpku -mno-rdpid --param l1-cache-size=32 --param
l1-cache-line-size=64 --param l2-cache-size=11264 -mtune=generic -quiet
-dumpbase t6.c -mavx -auxbase-strip - -O2 -version -o -
-fstack-protector-strong -Wformat -Wformat-security
>From gcc-bugs-return-620788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 02:41:46 2018
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Subject: [Bug web/79738] Documentation for __attribute__((const)) slightly misleading
Date: Mon, 12 Nov 2018 02:41:00 -0000
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sandra at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org,
| |sandra at gcc dot gnu.org
--- Comment #2 from sandra at gcc dot gnu.org ---
The documentation for both "const" and "pure" was rewritten somewhat in r255469
(along with some much bigger changes to the attribute handling code to detect
conflicts); now both places refer to "reading global variables" in discussing
the differences between the two attributes. I think the semantics of the
attributes have not changed and the suggested language is still good, correct?
>From gcc-bugs-return-620789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 02:50:41 2018
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From: "thiago at kde dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87976] [i386] Sub-optimal code generation for _mm256_set1_epi64()
Date: Mon, 12 Nov 2018 02:50:00 -0000
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--- Comment #3 from Thiago Macieira <thiago at kde dot org> ---
Workaround:
__m128i value64 = _mm_set_epi64x(0, value); // _mm_cvtsi64_si128(value);
asm ("" : "+x" (value64));
__m256i value256 = _mm256_broadcastq_epi64(value64);
>From gcc-bugs-return-620790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 05:36:31 2018
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Subject: [Bug middle-end/81512] duplicate note in -Walloca-larger-than and alloca in a return statement
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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CC| |aldyh at gcc dot gnu.org
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Aldy added -Walloca-larger-than, right? cc-ing him
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Subject: [Bug driver/31357] document that --help and --help=<value> options cannot be combined.
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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Keywords| |easyhack
CC| |sandra at codesourcery dot com
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing the documentation maintainer who has most recently been taking care of
documentation bugs
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Subject: [Bug c++/82110] Concept for default constructing works with new T, not with new T[1]
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing concepts pseudo-maintainer
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From: "sandra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/61588] Optimization defaults are not what documentation say they should be
Date: Mon, 12 Nov 2018 05:50:00 -0000
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sandra at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #5 from sandra at gcc dot gnu.org ---
This bug is basically a duplicate of PR 87929, which was recently fixed on
trunk. I believe the current documentation is correct, so I'm marking this one
fixed as well.
>From gcc-bugs-return-620794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 06:23:57 2018
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Subject: [Bug c/69502] attribute aligned reduces alignment contrary to documentation
Date: Mon, 12 Nov 2018 06:23:00 -0000
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--- Comment #3 from sandra at gcc dot gnu.org ---
Author: sandra
Date: Mon Nov 12 06:23:16 2018
New Revision: 266025
URL: https://gcc.gnu.org/viewcvs?rev=266025&root=gcc&view=rev
Log:
2018-11-11 Sandra Loosemore <sandra@codesourcery.com>
PR c/69502
gcc/
* doc/extend.texi (Common Type Attributes): For the align type
attribute, copy language about decreasing alignment from the
corresponding variable attribute.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/extend.texi
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Subject: [Bug c/69502] attribute aligned reduces alignment contrary to documentation
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sandra at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #4 from sandra at gcc dot gnu.org ---
Fixed on trunk.
>From gcc-bugs-return-620796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 06:39:57 2018
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Subject: [Bug tree-optimization/87977] New: [9 Regression] ICE: verify_ssa failed (error: definition in block 4 follows the use)
Date: Mon, 12 Nov 2018 06:39:00 -0000
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Bug ID: 87977
Summary: [9 Regression] ICE: verify_ssa failed (error:
definition in block 4 follows the use)
Product: gcc
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gcc-9.0.0-alpha20181111 snapshot (r266019) ICEs when compiling
gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c w/ -g -O1 (-O2, -O3, -Ofast, -Os)
-funsafe-math-optimizations:
% gcc-9.0.0-alpha20181111 -g -O1 -funsafe-math-optimizations -c
gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c
gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c: In function 'foo':
gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c:5:1: error: definition in block 4
follows the use
5 | foo (double a)
| ^~~
for SSA_NAME: tmp_5 in statement:
# DEBUG tmp => tmp_5
during GIMPLE pass: recip
gcc/testsuite/gcc.dg/recip_sqrt_mult_3.c:5:1: internal compiler error:
verify_ssa failed
0xeea763 verify_ssa(bool, bool)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-ssa.c:1188
0xc04e8d execute_function_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/passes.c:1932
0xc05c8e execute_todo
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/passes.c:1979
>From gcc-bugs-return-620797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 06:42:06 2018
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Subject: [Bug rtl-optimization/85727] ICE in simplify_subreg, at simplify-rtx.c:6271
Date: Mon, 12 Nov 2018 06:42:00 -0000
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--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
I cannot reproduce it on the trunk anymore (as of r266019).
>From gcc-bugs-return-620798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 06:59:23 2018
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
Date: Mon, 12 Nov 2018 06:59:00 -0000
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--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I'm running this on all archs, to see what (if anything) degrades.
I have both wins and losses, unlike the reversion of the nonzero_bits1 change
where I have only losses, but I nevertheless think it's _not_ the way to go.
>From gcc-bugs-return-620799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 07:10:36 2018
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Subject: [Bug target/87976] [i386] Sub-optimal code generation for _mm256_set1_epi64()
Date: Mon, 12 Nov 2018 07:10:00 -0000
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> apinski@xeond:~/src/toolchain-o7$ gcc t6.c -mavx -O2 -S -o - -march=native
> .file "t6.c"
> .text
> .p2align 4,,15
> .globl g
> .type g, @function
> g:
> .LFB4758:
> .cfi_startproc
> vpbroadcastq %rdi, %ymm0
> jmp f@PLT
> .cfi_endproc
This requires AVX512. Regular -march=skylake still goes through the stack. So
it seems at least a tiny bit different from bug 80820 where -march=haswell is
enough to avoid going through memory.
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Subject: [Bug c++/87978] New: Local Register Variables Have No Effect When There is A Call Statement Between
Date: Mon, 12 Nov 2018 07:49:00 -0000
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Bug ID: 87978
Summary: Local Register Variables Have No Effect When There is
A Call Statement Between
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Source:
struct Code {
void* instruction_start;
};
Code GetCode();
#define WRONG_CODE 1
void __attribute__((noreturn)) Foo(int numargs, void* entry) {
#if WRONG_CODE
register int param1 asm("r1") = numargs;
register void* param2 asm("r0") = entry;
asm volatile("bx %0\n"
:
: "r"(GetCode().instruction_start), "r"(param1), "r"(param2));
#else
Code code = GetCode();
register int param1 asm("r1") = numargs;
register void* param2 asm("r0") = entry;
void* instruction_start = code.instruction_start;
asm volatile("bx %0\n"
:
: "r"(instruction_start), "r"(param1), "r"(param2));
#endif
__builtin_unreachable();
}
When WRONG_CODE and compile with arm-linux-androideabi-g++ -fPIC -O2
-march=armv7-a -mfloat-abi=softfp -mthumb
--sysroot=/home/linzj/android-ndk-r13b/platforms/android-21/arch-arm/
-fomit-frame-pointer -S -mfpu=neon -Wall testclobber.cpp
The code generated is
push {r3, lr}
.save {r3, lr}
bl _Z7GetCodev(PLT)
.syntax unified
@ 13 "testclobber.cpp" 1
bx r0
And When the opposite:
push {r3, r4, r5, lr}
.save {r3, r4, r5, lr}
mov r4, r1
mov r5, r0
bl _Z7GetCodev(PLT)
mov r1, r5
mov r3, r0
mov r0, r4
.syntax unified
@ 21 "testclobber.cpp" 1
bx r3
clang/llvm can make both case correct.
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Subject: [Bug target/87979] New: ICE in compute_split_row at modulo-sched.c:2393
Date: Mon, 12 Nov 2018 08:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87979
Bug ID: 87979
Summary: ICE in compute_split_row at modulo-sched.c:2393
Product: gcc
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Keywords: ice-on-valid-code
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Following is ICEing:
$ gcc
/home/marxin/BIG/Programming/llvm/tools/clang/test/OpenMP/taskloop_simd_reduction_messages.cpp
-march=z196 -fmodulo-sched -Os -fno-tree-loop-im
during RTL pass: sms
/home/marxin/BIG/Programming/llvm/tools/clang/test/OpenMP/taskloop_simd_reduction_messages.cpp:
In function ‘int main(int, char**)’:
/home/marxin/BIG/Programming/llvm/tools/clang/test/OpenMP/taskloop_simd_reduction_messages.cpp:335:1:
internal compiler error: Floating point exception
335 | }
| ^
0xb2768f crash_signal
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/toplev.c:325
0x7ffff6bc310f ???
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x1134ced compute_split_row
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/modulo-sched.c:2393
0x1135825 sms_schedule_by_order
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/modulo-sched.c:2224
0x11376ce sms_schedule
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/modulo-sched.c:1612
0x11376ce execute
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-s390x/build/gcc/modulo-sched.c:3337
>From gcc-bugs-return-620802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:07:39 2018
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Subject: [Bug tree-optimization/87962] [9 Regression] ICE in vect_get_vec_def_for_operand_1, at tree-vect-stmts.c:1485
Date: Mon, 12 Nov 2018 08:07:00 -0000
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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> ---
Mine then.
>From gcc-bugs-return-620805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:08:47 2018
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Subject: [Bug inline-asm/87978] Local Register Variables Have No Effect When There is A Call Statement Between
Date: Mon, 12 Nov 2018 08:08:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
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). In this case, use temporary variables for expressions between the register
assignments:
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Subject: [Bug inline-asm/87978] Local Register Variables Have No Effect When There is A Call Statement Between
Date: Mon, 12 Nov 2018 08:08:00 -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> ---
This is already documented that this will not work.
See
https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html#Local-Register-Variables
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Subject: [Bug c++/87967] [9 Regression] ICE in slpeel_duplicate_current_defs_from_edges
Date: Mon, 12 Nov 2018 08:08:00 -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> ---
Mine.
>From gcc-bugs-return-620806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:09:20 2018
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Subject: [Bug inline-asm/87978] Local Register Variables Have No Effect When There is A Call Statement Between
Date: Mon, 12 Nov 2018 08:09:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gcc/Local-Register-Variables.html#Local-Register-Variables
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug inline-asm/87978] Local Register Variables Have No Effect When There is A Call Statement Between
Date: Mon, 12 Nov 2018 08:11:00 -0000
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gcc/Local-Register-Variables.
> html#Local-Register-Variables
I should say it had that warning already in 8.2.0.
And 8.1.0:
https://gcc.gnu.org/onlinedocs/gcc-8.1.0/gcc/Local-Register-Variables.html#Local-Register-Variables
Even for 6.1.0:
https://gcc.gnu.org/onlinedocs/gcc-6.1.0/gcc/Local-Register-Variables.html#Local-Register-Variables
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Subject: [Bug c++/87974] [9 Regression] ICE in vect_get_vec_def_for_stmt_copy
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Martin Liška <marxin at gcc dot gnu.org> changed:
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Subject: [Bug c++/87974] [9 Regression] ICE in vect_get_vec_def_for_stmt_copy
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87974
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-11-12
CC| |rguenth at gcc dot gnu.org
Known to work| |8.2.0
Summary|ice in |[9 Regression] ICE in
|vect_get_vec_def_for_stmt_c |vect_get_vec_def_for_stmt_c
|opy |opy
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It's probably dup of PR87931.
>From gcc-bugs-return-620810-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:14:04 2018
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Subject: [Bug d/87824] x86_64-linux multilib issues
Date: Mon, 12 Nov 2018 08:14:00 -0000
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--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Sun, 11 Nov 2018, johannespfau at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87824
>
> Johannes Pfau <johannespfau at gmail dot com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |johannespfau at gmail dot com
>
> --- Comment #5 from Johannes Pfau <johannespfau at gmail dot com> ---
> Iain, is there a specific reason why we don't have i686 on the GDC/buildkite
> CI? We could simply run a QEMU/KVM VM on a x86_64 host for this.
>
> And when running the testsuite on multilib, is it now running all tests (test
> suite and druntime, phobos) for all multilib variants? I think last time I
> checked, multilib testing tested only the main variant for some reason.
To check other variants you have to do sth like
make -jN -k check RUNTESTFLAGS="--target_board=unix/\{,-m32\}"
if you have a x32 runtime you can add ,-mx32 as well.
>From gcc-bugs-return-620811-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:15:47 2018
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Subject: [Bug inline-asm/87978] Local Register Variables Have No Effect When There is A Call Statement Between
Date: Mon, 12 Nov 2018 08:15:00 -0000
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--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The old documentation contained slightly different wording but was trying to
warn you about this case:
As for global register variables, it's recommended that you choose a register
which is normally saved and restored by function calls on your machine, so that
library routines will not clobber it. A common pitfall is to initialize
multiple call-clobbered registers with arbitrary expressions, where a function
call or library call for an arithmetic operator will overwrite a register value
from a previous assignment, for example r0 below:
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Subject: [Bug tree-optimization/87977] [9 Regression] ICE: verify_ssa failed (error: definition in block 4 follows the use)
Date: Mon, 12 Nov 2018 08:16:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-11-12
CC| |ktkachov at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Known to work| |8.2.0
Target Milestone|--- |9.0
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r264126.
>From gcc-bugs-return-620813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:17:33 2018
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Subject: [Bug c++/87974] [9 Regression] ICE in vect_get_vec_def_for_stmt_copy
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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-620814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:26:00 2018
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Subject: [Bug libfortran/87966] [9 regression] The SPEC2006 tests 416.gamess and 481.wrf fail starting with r265946
Date: Mon, 12 Nov 2018 08:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Should be fixed. Please re-open if not.
>From gcc-bugs-return-620815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:26:29 2018
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Subject: [Bug fortran/87968] [7/8/9 Regression] Warning about uninizialized variables in array constructor
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>From gcc-bugs-return-620816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:31:12 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87980] New: ICE in gfc_conv_descriptor_data_get, at fortran/trans-array.c for assignment on polymorphic variable
Date: Mon, 12 Nov 2018 08:31:00 -0000
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Bug ID: 87980
Summary: ICE in gfc_conv_descriptor_data_get, at
fortran/trans-array.c for assignment on polymorphic
variable
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: juergen.reuter at desy dot de
Target Milestone: ---
Created attachment 44987
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44987&action=edit
Reproducer for the ICE
The following code using assignment on polymorphic variables yields an ICE in
gfc_conv_descriptor_data_get, at fortran/trans-array.c:145 with the actual
trunk (r266011). This feature was not supported in gfortran 5 and 6 and gives
an ICE in gfortran 7/8/9:
gfortran -c quantum_numbers.f90
quantum_numbers.f90:35:0:
35 | if (present (col)) call qns%qn(i)%set (col=col(i))
|
internal compiler error: in gfc_conv_descriptor_data_get, at
fortran/trans-array.c:145
For us, this is lower priority as the problem occurs in an experimental branch
of our development.
This is the code triggering the ICE (also attached):
module quantum_numbers
implicit none
type, abstract :: col_t
end type col_t
type :: qn_t
private
class(col_t), allocatable :: c
contains
procedure :: set => qn_set
end type qn_t
type :: qn_string_t
private
integer :: length = 0
type(qn_t), dimension(:), allocatable :: qn
end type qn_string_t
contains
impure elemental subroutine qn_set (qn, col)
class(qn_t), intent(inout) :: qn
class(col_t), intent(in), optional :: col
if (present (col)) then
qn%c = col
end if
end subroutine qn_set
subroutine qn_string_set (qns, col)
class(qn_string_t), intent(inout) :: qns
class(col_t), dimension(:), intent(in), optional :: col
integer :: i
do i = 1, qns%length
if (present (col)) call qns%qn(i)%set (col=col(i))
end do
end subroutine qn_string_set
end module quantum_numbers
>From gcc-bugs-return-620817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:33:51 2018
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Subject: [Bug fortran/87980] ICE in gfc_conv_descriptor_data_get, at fortran/trans-array.c for assignment on polymorphic variable
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--- Comment #1 from Jürgen Reuter <juergen.reuter at desy dot de> ---
There might be a relationship for 80774 which is at (almost) the same position,
but for coarray objects than for polymorphics. As this started from version 7
on, maybe the implementation for polymorphics broke the coarray objects? This
bug here is no regression but seems to be there from day 1 of implementation.
>From gcc-bugs-return-620818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:34:38 2018
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
Date: Mon, 12 Nov 2018 08:34:00 -0000
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--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I get this:
alpha 100.905%
arm 100.072%
c6x 100.000%
csky 100.063%
h8300 100.000%
i386 100.000%
microblaze 100.001%
mips 100.052%
mips64 100.043%
nios2 100.000%
parisc 100.049%
parisc64 100.031%
powerpc64 99.952%
riscv64 100.049%
s390 100.000%
sh 100.006%
shnommu 100.002%
sparc 100.003%
sparc64 100.007%
x86_64 100.000%
(the other 9 did not build, sigh. And this is code size).
The alpha one looks really bad. Only the powerpc64 is a win.
>From gcc-bugs-return-620820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:38:51 2018
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Subject: [Bug rtl-optimization/87718] [9 Regression] FAIL: gcc.target/i386/avx512dq-concatv2si-1.c
Date: Mon, 12 Nov 2018 08:38:00 -0000
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
*** Bug 87717 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-620819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:38:50 2018
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Subject: [Bug rtl-optimization/87717] [9 Regression] FAIL: gcc.target/i386/avx512vl-concatv2si-1.c scan-assembler vpunpckldq[^\n\r]*%xmm17[^\n\r]*%xmm16[^\n\r]*%xmm3
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Dup.
*** This bug has been marked as a duplicate of bug 87718 ***
>From gcc-bugs-return-620822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:39:49 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/87981] New: ICE: Segmentation fault (in add_phi_arg)
Date: Mon, 12 Nov 2018 08:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87981
Bug ID: 87981
Summary: ICE: Segmentation fault (in add_phi_arg)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
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Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20181111 snapshot (r266019), 8.2, 7.3 all ICE when compiling
gcc/testsuite/gcc.dg/vect/vect-cond-arith-2.c w/ -fexceptions -fgimple:
% gcc-9.0.0-alpha20181111 -fexceptions -fgimple -c
gcc/testsuite/gcc.dg/vect/vect-cond-arith-2.c
during GIMPLE pass: cfg
gcc/testsuite/gcc.dg/vect/vect-cond-arith-2.c: In function 'neg_xi':
gcc/testsuite/gcc.dg/vect/vect-cond-arith-2.c:5:1: internal compiler error:
Segmentation fault
5 | neg_xi (double *x)
| ^~~~~~
0xce6f8f crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/toplev.c:325
0xd9c678 add_phi_arg(gphi*, tree_node*, edge_def*, unsigned int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-phinodes.c:358
0xd304b4 lower_phi_internal_fn
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-cfg.c:394
0xd304b4 build_gimple_cfg
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-cfg.c:249
0xd304b4 execute_build_cfg
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-cfg.c:408
0xd304b4 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181111/work/gcc-9-20181111/gcc/tree-cfg.c:444
I'm not marking it a regression because feeding GIMPLE to the driver was
implemented during the gcc 7 development cycle.
>From gcc-bugs-return-620821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:39:22 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/87980] ICE in gfc_conv_descriptor_data_get, at fortran/trans-array.c for assignment on allocatable polymorphic variable
Date: Mon, 12 Nov 2018 08:39:00 -0000
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Jürgen Reuter <juergen.reuter at desy dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|ICE in |ICE in
|gfc_conv_descriptor_data_ge |gfc_conv_descriptor_data_ge
|t, at fortran/trans-array.c |t, at fortran/trans-array.c
|for assignment on |for assignment on
|polymorphic variable |allocatable polymorphic
| |variable
--- Comment #2 from Jürgen Reuter <juergen.reuter at desy dot de> ---
should have been 'assignment on _allocatable_ polymorphic variable'
>From gcc-bugs-return-620823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:41:12 2018
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Subject: [Bug rtl-optimization/85727] ICE in simplify_subreg, at simplify-rtx.c:6271
Date: Mon, 12 Nov 2018 08:41:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
OK, I'll reopen it if necessary.
>From gcc-bugs-return-620824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:51:28 2018
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Subject: [Bug rtl-optimization/87718] [9 Regression] FAIL: gcc.target/i386/avx512dq-concatv2si-1.c
Date: Mon, 12 Nov 2018 08:51:00 -0000
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Following testcase:
--cut here--
typedef int V __attribute__((vector_size (8)));
void foo (int x, int y)
{
register int a __asm ("xmm1");
register int b __asm ("xmm2");
register V c __asm ("xmm3");
a = x;
b = y;
asm volatile ("" : "+v" (a), "+v" (b));
c = (V) { a, b };
asm volatile ("" : "+v" (c));
}
--cut here--
gets compiled with -O2 -mavx -mtune=intel:
vmovd %edi, %xmm1
vmovd %esi, %xmm2
vmovd %xmm2, %eax
vpinsrd $1, %eax, %xmm1, %xmm3
ret
The relevant pattern is defined as:
(define_insn "*vec_concatv2si_sse4_1"
[(set (match_operand:V2SI 0 "register_operand"
"=Yr,*x, x, v,Yr,*x, v, v, *y,*y")
(vec_concat:V2SI
(match_operand:SI 1 "nonimmediate_operand"
" 0, 0, x,Yv, 0, 0,Yv,rm, 0,rm")
(match_operand:SI 2 "nonimm_or_0_operand"
" rm,rm,rm,rm,Yr,*x,Yv, C,*ym, C")))]
"TARGET_SSE4_1 && !(MEM_P (operands[1]) && MEM_P (operands[2]))"
"@
pinsrd\t{$1, %2, %0|%0, %2, 1}
pinsrd\t{$1, %2, %0|%0, %2, 1}
vpinsrd\t{$1, %2, %1, %0|%0, %1, %2, 1}
vpinsrd\t{$1, %2, %1, %0|%0, %1, %2, 1}
punpckldq\t{%2, %0|%0, %2}
punpckldq\t{%2, %0|%0, %2}
vpunpckldq\t{%2, %1, %0|%0, %1, %2}
%vmovd\t{%1, %0|%0, %1}
punpckldq\t{%2, %0|%0, %2}
movd\t{%1, %0|%0, %1}"
but for some reason RA chooses alternative 2 (x<-x,rm) instead of alternative 6
(v<-Yv,Yv), although alternative 2 needs an extra reload from %xmm2 to %eax.
>From gcc-bugs-return-620825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:57:42 2018
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--- Comment #6 from linzj <manjian2006 at gmail dot com> ---
Thanks for the reply.
>From gcc-bugs-return-620826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 08:59:01 2018
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
Date: Mon, 12 Nov 2018 08:59:00 -0000
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--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
Thanks, that confirms my expectation that this could/would affect other
targets.
I had previously posted the fragment below for review - and will update that
thread shortly.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 163682bdff..405bfd082b 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -11530,6 +11530,15 @@ ix86_compute_frame_layout (void)
crtl->preferred_stack_boundary = 128;
crtl->stack_alignment_needed = 128;
}
+ else if (TARGET_MACHO && crtl->preferred_stack_boundary < 128
+ && !crtl->is_leaf)
+ {
+ /* Darwin's ABI specifies 128b alignment for both 32 and
+ 64 bit variants at call sites. So we apply this if the
+ current function is not a leaf. */
+ crtl->preferred_stack_boundary = 128;
+ crtl->stack_alignment_needed = 128;
+ }
stack_alignment_needed = crtl->stack_alignment_needed / BITS_PER_UNIT;
preferred_alignment = crtl->preferred_stack_boundary / BITS_PER_UNIT;
>From gcc-bugs-return-620827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 09:02:53 2018
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Iain Sandoe from comment #2)
> I had previously posted the fragment below for review - and will update that
> thread shortly.
But still - why doesn't expand_call update crtl->preferred_stack_update to 128,
as is the case with linux targets?
>From gcc-bugs-return-620828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 09:03:45 2018
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
Date: Mon, 12 Nov 2018 09:03:00 -0000
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--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I get this:
>
> alpha 100.905%
> arm 100.072%
> c6x 100.000%
> csky 100.063%
> h8300 100.000%
> i386 100.000%
> microblaze 100.001%
> mips 100.052%
> mips64 100.043%
> nios2 100.000%
> parisc 100.049%
> parisc64 100.031%
> powerpc64 99.952%
> riscv64 100.049%
> s390 100.000%
> sh 100.006%
> shnommu 100.002%
> sparc 100.003%
> sparc64 100.007%
> x86_64 100.000%
Thanks. Note that the patch only changes something for
WORD_REGISTER_OPERATIONS
targets though, so you can exclude h8300, i386, powerpc64, s390 and x86_64.
Can you easily re-do the test with the reversion of the nonzero_bits1 change,
i.e. the patch that you had/have in your tree?
> The alpha one looks really bad. Only the powerpc64 is a win.
See above, this must be something else.
>From gcc-bugs-return-620829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 09:04:17 2018
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Subject: [Bug libstdc++/87982] New: No error for std::generate_n(ptr, ptr, f)
Date: Mon, 12 Nov 2018 09:04:00 -0000
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Bug ID: 87982
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#include <algorithm>
int main()
{
int a[2];
std::generate_n(a, a+2, []{ return 0;});
}
This compiles without error, but crashes at runtime.
The code should use std::generate(a, a+2, f) or std::generate_n(a, 2, f).
With -Wextra -Wsystem-headers there's a clue something is wrong, but it doesn't
make the problem clear:
In file included from /usr/include/c++/7/algorithm:62:0,
from gn.cc:1:
/usr/include/c++/7/bits/stl_algo.h: In instantiation of ‘_OIter
std::generate_n(_OIter, _Size, _Generator) [with _OIter = int*; _Size = int*;
_Generator = main()::<lambda()>]’:
gn.cc:6:41: required from here
/usr/include/c++/7/bits/stl_algo.h:4467:13: warning: ordered comparison of
pointer with integer zero [-Wextra]
__niter > 0; --__niter, ++__first)
~~~~~~~~^~~
>From gcc-bugs-return-620830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 09:07:14 2018
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Subject: [Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine
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--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Yes, that is already running... Still has over an hour to go.
>From gcc-bugs-return-620831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 09:08:21 2018
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Subject: [Bug target/87976] [i386] Sub-optimal code generation for _mm256_set1_epi64()
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2018-11-12
CC| |amonakov at gcc dot gnu.org
Resolution|DUPLICATE |---
Ever confirmed|0 |1
--- Comment #5 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Reopening per comment #4: while we do generate optimal code with -mavx512vl, we
should do a better job with plain avx2 (i.e. with -march=haswell).
>From gcc-bugs-return-620832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 09:11:19 2018
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Subject: [Bug c/87983] New: Feature: Add a warning when case labels from a different enum than the one in switch(EXPR) are used
Date: Mon, 12 Nov 2018 09:11:00 -0000
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Bug ID: 87983
Summary: Feature: Add a warning when case labels from a
different enum than the one in switch(EXPR) are used
Product: gcc
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A bug was fixed in git that would have been spotted by the following program
warning:
```
#include <stdio.h>
enum { A, B } foo = A;
enum { C, D } bar = C;
int main(void)
{
switch (foo) {
case C: /* Should warn: switch() on C instead of A */
puts("A");
break;
case B:
puts("B");
break;
}
}
```
I don't know how hard it would be to implement this. I understand why it's not
warning, in C enums are only skin-deep, so the compiler would need to keep
track of "foo" and the name (not just value) of C and B, and it wouldn't work
in the more general case of:
```
switch (some_complex_function(foo)) [...]
```
>From gcc-bugs-return-620833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 09:38:52 2018
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Subject: [Bug tree-optimization/87981] ICE: Segmentation fault (in add_phi_arg)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87981
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-11-12
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> ---
Note this is a limitation of the GIMPLE FE which needs to build up a CFG to
truly fix such issues.
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/87984] New: [7/8/9 Regression] wrong code for local reg var input to asm
Date: Mon, 12 Nov 2018 09:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87984
Bug ID: 87984
Summary: [7/8/9 Regression] wrong code for local reg var input
to asm
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: inline-asm
Assignee: unassigned at gcc dot gnu.org
Reporter: amonakov at gcc dot gnu.org
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In the following snippet the arguments to the second asm are not correctly
prepared:
void f(long long x[])
{
register int a asm("eax");
register int d asm("edx");
a = x[0] / x[1];
asm ("# %0" :: "r"(a));
int t;
t = x[2] / x[3];
a = x[0] / x[1];
d = t;
asm ("# %0 %1" :: "r"(a), "r"(d));
}
with -O2 -m32 we generate
call __divdi3
movl %eax, %edx
#APP
# %eax %edx
#NO_APP
We should emit moves to hardregs just prior to the asm, not lower user
variables to hardregs up front.
This is a regression on all active branches, gcc-4.4 used to get this right.
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
Date: Mon, 12 Nov 2018 10:01:00 -0000
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--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #3)
> (In reply to Iain Sandoe from comment #2)
> > I had previously posted the fragment below for review - and will update that
> > thread shortly.
> But still - why doesn't expand_call update crtl->preferred_stack_update to
> 128, as is the case with linux targets?
Digging deeper through expand_call, the alignment is reduced here:
if (fndecl)
{
struct cgraph_rtl_info *i = cgraph_node::rtl_info (fndecl);
/* Without automatic stack alignment, we can't increase preferred
stack boundary. With automatic stack alignment, it is
unnecessary since unless we can guarantee that all callers will
align the outgoing stack properly, callee has to align its
stack anyway. */
if (i
&& i->preferred_incoming_stack_boundary
&& i->preferred_incoming_stack_boundary < preferred_stack_boundary)
preferred_stack_boundary = i->preferred_incoming_stack_boundary;
}
and i->preferred_incoming_stack_boundary is set to 64 in final.c,
rest_of_clean_state:
/* We can reduce stack alignment on call site only when we are sure that
the function body just produced will be actually used in the final
executable. */
if (flag_ipa_stack_alignment
&& decl_binds_to_current_def_p (current_function_decl))
{
unsigned int pref = crtl->preferred_stack_boundary;
if (crtl->stack_alignment_needed > crtl->preferred_stack_boundary)
pref = crtl->stack_alignment_needed;
cgraph_node::rtl_info (current_function_decl)
->preferred_incoming_stack_boundary = pref;
}
So, what we want to achieve here?
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Subject: [Bug inline-asm/87978] Local Register Variables Have No Effect When There is A Call Statement Between
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #7 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Nevertheless, our rtl-expansion approach for local reg vars is wrong and it's
possible to show examples that follow recommendations and still get
miscompiled: PR 87984.
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Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
Date: Mon, 12 Nov 2018 10:01:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I dont think this is a bug. The warning in the manual talks about the call
case even.
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Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In fact the warning even mentions this case:
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). In this case, use temporary variables for expressions between the
register assignments:
See the part that is surrounded by __.
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Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Reopening - please read the testcase in detail. Neither the 'a' nor the 'd'
input are clobbered in the original code, which uses a temporary ('t') as
recommended by the docs.
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Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #3)
> Reopening - please read the testcase in detail. Neither the 'a' nor the 'd'
> input are clobbered in the original code, which uses a temporary ('t') as
> recommended by the docs.
Except a is used twice. Which even though is not very specific in the manual
is also not a support case.
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Subject: [Bug libstdc++/87982] No error for std::generate_n(ptr, ptr, f)
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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> ---
If we change the literal 0 to something like (int)0 then it can't be used in
comparisons with pointers:
/home/jwakely/gcc/9/include/c++/9.0.0/bits/stl_algo.h:4449:13: error: ISO C++
forbids comparison between pointer and integer [-fpermissive]
4449 | __niter > (int)0; --__niter, (void) ++__first)
| ~~~~~~~~^~~~~~~~
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87982] No error for std::generate_n(ptr, ptr, f)
Date: Mon, 12 Nov 2018 10:09:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
std::fill_n has the same problem (in both overloads of __fill_n_a).
>From gcc-bugs-return-620843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 10:10:31 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
Date: Mon, 12 Nov 2018 10:10:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |INVALID
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mainly because the value assigned to a is removed as it is redundant.
>From gcc-bugs-return-620844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 10:13:25 2018
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Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
Date: Mon, 12 Nov 2018 10:13:00 -0000
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The old documentation had the following:
Stores into local register variables may be deleted when they appear to be dead
according to dataflow analysis. References to local register variables may be
deleted or moved or simplified.
I can't seem to find that in the newer one but it still applies here.
>From gcc-bugs-return-620845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 10:19:55 2018
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Subject: [Bug libstdc++/54005] Use __atomic_always_lock_free in libstdc++ is_lock_free instead of __atomic_is_lock_free
Date: Mon, 12 Nov 2018 10:19:00 -0000
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--- Comment #37 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Hans-Peter Nilsson from comment #36)
> Either I goofed on the ChangeLog markup
I think it's because you use "PR libstdc++-v3/nnnnn" not "PR libstdc++/nnnnn"
> As the tests I wrote have no bearing on the code change, I did not commit
> them.
> (If you still want them committed, please tell.)
No need. Thanks.
>From gcc-bugs-return-620846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:01:09 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/87985] New: Compile-time and memory hog w/ -O1 -ftree-slp-vectorize
Date: Mon, 12 Nov 2018 11:01:00 -0000
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Bug ID: 87985
Summary: Compile-time and memory hog w/ -O1
-ftree-slp-vectorize
Product: gcc
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All gcc versions from the current trunk down to 4.5 branch (where
-ftree-slp-vectorize was introduced) take indefinite time and memory compiling
gcc/testsuite/gcc.dg/pr85180.c at any -O level (except -Og) w/
-ftree-slp-vectorize.
% timeout 10 gcc-9.0.0-alpha20181111 -O1 -ftree-slp-vectorize -c
gcc/testsuite/gcc.dg/pr85180.c
zsh: exit 124 timeout 10 gcc-9.0.0-alpha20181111 -O1 -ftree-slp-vectorize -c
perf top:
Overhead Shared Objec Symbol
56.63% cc1 [.] operand_equal_p
7.21% cc1 [.] tree_operand_check
6.65% cc1 [.] tree_strip_nop_conversions
5.14% cc1 [.] element_precision
3.86% cc1 [.] fold_binary_loc
2.42% cc1 [.] split_constant_offset_1
2.12% cc1 [.] split_tree
2.02% cc1 [.] wide_int_to_tree_1
1.79% cc1 [.] generic_simplify_PLUS_EXPR
1.44% cc1 [.] split_constant_offset
1.08% cc1 [.] build2
0.93% cc1 [.] ggc_internal_alloc
0.83% cc1 [.] integer_zerop
0.83% cc1 [.] build_int_cst
0.55% cc1 [.] tree_swap_operands_p
0.50% cc1 [.] canonize
0.50% cc1 [.] commutative_tree_code
It's even not necessary to leave ten Zs, as the issue is reproducible w/ as
"low" as two Ys.
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #4)
> So, what we want to achieve here?
AFAICS, the compiler figures out that the called function requires only 64bit
alignment and lowers the alignment requirements at the call site. So, although
the callee is not leaf, it gets "misaligned" to 64 bit.
If there are additional requirements for the alignment at call site (c.f.
Description), then the patch in Comment #2 is correct.
>From gcc-bugs-return-620848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:07:59 2018
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
Date: Mon, 12 Nov 2018 11:07:00 -0000
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--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #5)
> (In reply to Uroš Bizjak from comment #4)
> > So, what we want to achieve here?
> AFAICS, the compiler figures out that the called function requires only
> 64bit alignment and lowers the alignment requirements at the call site. So,
> although the callee is not leaf, it gets "misaligned" to 64 bit.
>
> If there are additional requirements for the alignment at call site (c.f.
> Description), then the patch in Comment #2 is correct.
For both m32 and m64 Darwin requires 128b alignment at cll sites (256 if AVX is
used).
for sysV5 psABI targets, the call site requirement is 64 for m32 and 126/256
for m64.
As er your suggestion, I am bootstrapping/testing:
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 711bec0..458430a 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -11149,8 +11149,13 @@ ix86_compute_frame_layout (void)
/* 64-bit MS ABI seem to require stack alignment to be always 16,
except for function prologues, leaf functions and when the defult
incoming stack boundary is overriden at command line or via
- force_align_arg_pointer attribute. */
- if ((TARGET_64BIT_MS_ABI && crtl->preferred_stack_boundary < 128)
+ force_align_arg_pointer attribute.
+
+ Darwin's ABI specifies 128b alignment for both 32 and 64 bit variants
+ at call sites.
+ */
+ if (((TARGET_64BIT_MS_ABI || TARGET_MACHO)
+ && crtl->preferred_stack_boundary < 128)
&& (!crtl->is_leaf || cfun->calls_alloca != 0
|| ix86_current_function_calls_tls_descriptor
|| ix86_incoming_stack_boundary < 128))
>From gcc-bugs-return-620849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:09:44 2018
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From: "avarab at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/87983] Feature: Add a warning when case labels from a different enum than the one in switch(EXPR) are used
Date: Mon, 12 Nov 2018 11:09:00 -0000
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--- Comment #1 from Ævar Arnfjörð Bjarmason <avarab at gmail dot com> ---
FYI: I filed a bug with clang for the same feature:
https://bugs.llvm.org/show_bug.cgi?id=39635
>From gcc-bugs-return-620850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:16:01 2018
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Subject: [Bug inline-asm/87984] [7/8/9 Regression] wrong code for local reg var input to asm
Date: Mon, 12 Nov 2018 11:16:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|INVALID |---
--- Comment #7 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
OK, here's an example where 'a' is used once:
void f(long long x[])
{
for (int i=0; i<3; i++) {
register int a asm("eax");
a = x[0] / x[1];
asm("# %0" :: "r"(a));
asm("xor %%eax, %%eax" ::: "eax");
}
}
>From gcc-bugs-return-620851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:21:33 2018
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
Date: Mon, 12 Nov 2018 11:21:00 -0000
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--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Iain Sandoe from comment #6)
> for sysV5 psABI targets, the call site requirement is 64 for m32 and 126/256
> for m64.
sysV5 requires 128bit alignment at the call site, but on linux no runtime
mechanism enforces this requirement. So, if it is possible to prove that the
called function doesn't need 128bit alignment, we can misalign the caller to
word size without consequences. From the trail of this PR, I suspect this is
not the case on Darwin.
>From gcc-bugs-return-620852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:27:28 2018
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Subject: [Bug target/78444] Wrong prologue stack alignment for implicit dtor on x86_64-darwin*
Date: Mon, 12 Nov 2018 11:27:00 -0000
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--- Comment #8 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Uroš Bizjak from comment #7)
> (In reply to Iain Sandoe from comment #6)
> > for sysV5 psABI targets, the call site requirement is 64 for m32 and 126/256
> > for m64.
> sysV5 requires 128bit alignment at the call site, but on linux no runtime
> mechanism enforces this requirement. So, if it is possible to prove that the
> called function doesn't need 128bit alignment, we can misalign the caller to
> word size without consequences. From the trail of this PR, I suspect this is
> not the case on Darwin.
Correct;
Darwin's dynamic loader enforces the alignment requirement.
>From gcc-bugs-return-620853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:34:16 2018
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Subject: [Bug fortran/87881] gfortran.dg/inquiry_type_ref_(1.f08|3.f90) fail on darwin
Date: Mon, 12 Nov 2018 11:34:00 -0000
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--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Hi Dominique,
I am just back from a business trip to the US. I will attend to this bug asap.
Thanks
Paul
>From gcc-bugs-return-620854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:35:15 2018
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/87986] New: Assembler errors w/ -masm=intel
Date: Mon, 12 Nov 2018 11:35:00 -0000
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Bug ID: 87986
Summary: Assembler errors w/ -masm=intel
Product: gcc
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Target: x86_64-pc-linux-gnu
Let's consider the following cases:
% cat logpnyyb.c
int bx;
void
ue (void)
{
bx = 0;
}
% cat rluc6lhr.c
void
k1 (void)
{
}
Compiling them for x86_64 w/ -masm=intel yields the following:
% gcc-9.0.0-alpha20181111 -pipe -masm=intel -c logpnyyb.c
{standard input}: Assembler messages:
{standard input}:15: Error: invalid use of register
% cat logpnyyb.s
.file "logpnyyb.c"
.intel_syntax noprefix
.text
.comm bx,4,4
.globl ue
.type ue, @function
ue:
.LFB0:
.cfi_startproc
push rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
mov rbp, rsp
.cfi_def_cfa_register 6
mov DWORD PTR bx[rip], 0
nop
pop rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size ue, .-ue
.ident "GCC: (GNU) 9.0.0-alpha20181111 20181111 (experimental)"
.section .note.GNU-stack,"",@progbits
% gcc-9.0.0-alpha20181111 -pipe -masm=intel -c rluc6lhr.c
{standard input}: Assembler messages:
{standard input}: Error: .size expression for k1 does not evaluate to a
constant
% cat rluc6lhr.s
.file "rluc6lhr.c"
.intel_syntax noprefix
.text
.globl k1
.type k1, @function
k1:
.LFB0:
.cfi_startproc
push rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
mov rbp, rsp
.cfi_def_cfa_register 6
nop
pop rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size k1, .-k1
.ident "GCC: (GNU) 9.0.0-alpha20181111 20181111 (experimental)"
.section .note.GNU-stack,"",@progbits
Top of trunk gcc is not actually necessary, it also reproduces at least on the
gcc 8 branch.
I have binutils 2.31.1 installed. I'm not sure which tool, gcc or gas, might be
at fault here, so I'll move this PR to the binutils Bugzilla if necessary.
>From gcc-bugs-return-620855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:37:21 2018
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From: "umesh.kalappa0 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
Date: Mon, 12 Nov 2018 11:37:00 -0000
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Umesh Kalappa <umesh.kalappa0 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |umesh.kalappa0 at gmail dot com
--- Comment #8 from Umesh Kalappa <umesh.kalappa0 at gmail dot com> ---
the following patch fix all the reported cases and tested with latest trunk and
8.1 source i.e
Index: gcc/cp/parser.c
===================================================================
--- gcc/cp/parser.c (revision 266026)
+++ gcc/cp/parser.c (working copy)
@@ -24615,6 +24615,8 @@
{
tree expr;
cp_lexer_consume_token (parser->lexer);
+
+ inject_this_parameter (current_class_type, TYPE_UNQUALIFIED);
if (cp_lexer_peek_token (parser->lexer)->type == CPP_OPEN_PAREN)
{
ok to commit ?
>From gcc-bugs-return-620856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Nov 12 11:50:45 2018
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In-Reply-To: <bug-52869-4-tj8h8EnZ7T@http.gcc.gnu.org/bugzilla/>
From: Umesh Kalappa <umesh.kalappa0@gmail.com>
Date: Mon, 12 Nov 2018 11:50:00 -0000
Message-ID: <CAGfacvTrDXn=wb+jKQcp8p-GROpuE1eJMTariZnv15spnARoBQ@mail.gmail.com>
Subject: Re: [Bug c++/52869] [DR 1207] "this" not being allowed in noexcept clauses
To: jason@redhat.com, nathan@acm.org, mikestump@comcast.net, iain@codesourcery.com
Cc: gcc-bugs@gcc.gnu.org
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Hi Jason /Nathan ,
We are able to fix the below issue and would like to hear any comments
/ suggestions will be appreciated.
Thank you
~Umesh
On Mon, Nov 12, 2018 at 5:07 PM umesh.kalappa0 at gmail dot com
<gcc-bugzilla@gcc.gnu.org> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?idR869
>
> Umesh Kalappa <umesh.kalappa0 at gmail dot com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |umesh.kalappa0 at gmail dot com
>
> --- Comment #8 from Umesh Kalappa <umesh.kalappa0 at gmail dot com> ---
> the following patch fix all the reported cases and tested with latest trunk and
> 8.1 source i.e
>
> Index: gcc/cp/parser.c
> ==================================================================> --- gcc/cp/parser.c (revision 266026)
> +++ gcc/cp/parser.c (working copy)
> @@ -24615,6 +24615,8 @@
> {
> tree expr;
> cp_lexer_consume_token (parser->lexer);
> +
> + inject_this_parameter (current_class_type, TYPE_UNQUALIFIED);
>
> if (cp_lexer_peek_token (parser->lexer)->type == CPP_OPEN_PAREN)
> {
>
> ok to commit ?
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug c++/41958] [c++0x] bogus variadic partial ordering code
2009-11-05 21:05 [Bug c++/41958] New: " jason at gcc dot gnu dot org
@ 2009-11-05 22:41 ` jason at gcc dot gnu dot org
0 siblings, 0 replies; 10+ messages in thread
From: jason at gcc dot gnu dot org @ 2009-11-05 22:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from jason at gcc dot gnu dot org 2009-11-05 22:41 -------
That is, I think this should be ambiguous since the WP says that unused default
args aren't considered in partial ordering (14.6.6.2):
template<typename T, typename... Args>
int& f(const T&, Args...);
template<typename T>
float& f(const T&, double d = 2);
float& g() {
return f(17);
}
--
jason at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-11-05 22:41:18
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41958
^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2018-11-07 0:51 UTC | newest]
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[not found] <bug-41958-4@http.gcc.gnu.org/bugzilla/>
2012-07-05 10:10 ` [Bug c++/41958] [c++0x] bogus variadic partial ordering code redi at gcc dot gnu.org
2012-11-18 13:41 ` paolo.carlini at oracle dot com
2012-11-18 22:29 ` zeratul976 at hotmail dot com
2012-11-19 0:21 ` paolo.carlini at oracle dot com
2012-11-19 1:57 ` jason at gcc dot gnu.org
2012-11-19 2:12 ` paolo.carlini at oracle dot com
2012-11-19 3:50 ` zeratul976 at hotmail dot com
2012-11-19 13:42 ` jason at gcc dot gnu.org
2018-11-07 0:51 ` frankhb1989 at gmail dot com
2009-11-05 21:05 [Bug c++/41958] New: " jason at gcc dot gnu dot org
2009-11-05 22:41 ` [Bug c++/41958] " jason at gcc dot gnu dot org
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