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* [Bug libstdc++/84928] std::accumulate should move the accumulator argument
[not found] <bug-84928-4@http.gcc.gnu.org/bugzilla/>
@ 2018-03-18 0:43 ` redi at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: redi at gcc dot gnu.org @ 2018-03-18 0:43 UTC (permalink / raw)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84928
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This isn't a bug, because that change has only been in the working draft for a
few months, and is not part of any published standard yet.
https://wg21.link/p0616R0
>From gcc-bugs-return-598018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 01:16:28 2018
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/84929] New: ICE at -O3 on valid code on x86_64-linux-gnu: tree check: expected polynomial_chrec, have nop_expr in analyze_siv_subscript_cst_affine, at tree-data-ref.c:3018
Date: Sun, 18 Mar 2018 01:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84929
Bug ID: 84929
Summary: ICE at -O3 on valid code on x86_64-linux-gnu: tree
check: expected polynomial_chrec, have nop_expr in
analyze_siv_subscript_cst_affine, at
tree-data-ref.c:3018
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
It happens at -O3. "-O2" works fine.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/8.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 8.0.1 20180317 (experimental) [trunk revision 258620] (GCC)
$ gcc-trunk -O3 abc.c
during GIMPLE pass: pcom
abc.c: In function ‘fn1’:
abc.c:2:6: internal compiler error: tree check: expected polynomial_chrec, have
nop_expr in analyze_siv_subscript_cst_affine, at tree-data-ref.c:3018
void fn1() {
^~~
0x6f05ca tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9322
0x76fe1b analyze_siv_subscript_cst_affine
../../gcc/gcc/tree.h:3135
0x1514588 analyze_siv_subscript
../../gcc/gcc/tree-data-ref.c:3898
0x1514588 analyze_overlapping_iterations
../../gcc/gcc/tree-data-ref.c:4153
0x1514588 subscript_dependence_tester_1
../../gcc/gcc/tree-data-ref.c:4694
0x1514a37 subscript_dependence_tester_1
../../gcc/gcc/tree-data-ref.c:4690
0x1514a37 subscript_dependence_tester
../../gcc/gcc/tree-data-ref.c:4744
0x1514a37 compute_affine_dependence(data_dependence_relation*, loop*)
../../gcc/gcc/tree-data-ref.c:4803
0x151661c compute_all_dependences(vec<data_reference*, va_heap, vl_ptr>,
vec<data_dependence_relation*, va_heap, vl_ptr>*, vec<loop*, va_heap, vl_ptr>,
bool)
../../gcc/gcc/tree-data-ref.c:4870
0x1516e0a compute_data_dependences_for_loop(loop*, bool, vec<loop*, va_heap,
vl_ptr>*, vec<data_reference*, va_heap, vl_ptr>*,
vec<data_dependence_relation*, va_heap, vl_ptr>*)
../../gcc/gcc/tree-data-ref.c:5269
0xd7d589 tree_predictive_commoning_loop
../../gcc/gcc/tree-predcom.c:3190
0xd805dd tree_predictive_commoning()
../../gcc/gcc/tree-predcom.c:3312
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.
$ cat abc.c
int a[4];
void fn1() {
unsigned long b = 7818038963515661296;
for (;; b++)
a[0xA699ECD2C348A3A0] = a[b];
}
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Subject: [Bug fortran/66310] Problems with intrinsic repeat for large number of copies
Date: Sun, 18 Mar 2018 02:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66310
--- Comment #23 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Ok I see it.
In fbuf.c (fbuf_alloc):
/* Round up to nearest multiple of the current buffer length. */
newlen = ((u->fbuf->pos + len) / u->fbuf->len + 1) *u->fbuf->len;
u->fbuf->buf = xrealloc (u->fbuf->buf, newlen);
u->fbuf->len = newlen;
We are rounding up to make sure we have enough buffer. The size newlen is
calculated to 2147484160 which exceeds the limit of 2147483647 and xrealloc
fails.
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/66310] Problems with intrinsic repeat for large number of copies
Date: Sun, 18 Mar 2018 04:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66310
--- Comment #24 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Jerry DeLisle from comment #23)
> Ok I see it.
>
> In fbuf.c (fbuf_alloc):
>
> /* Round up to nearest multiple of the current buffer length. */
> newlen = ((u->fbuf->pos + len) / u->fbuf->len + 1) *u->fbuf->len;
> u->fbuf->buf = xrealloc (u->fbuf->buf, newlen);
> u->fbuf->len = newlen;
>
> We are rounding up to make sure we have enough buffer. The size newlen is
> calculated to 2147484160 which exceeds the limit of 2147483647 and xrealloc
> fails.
There is a 2 GB limit on 32 bit processes, so this is not a bug. I suggest this
be closed.
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Subject: [Bug fortran/77414] ICE in create_function_arglist, at fortran/trans-decl.c:2410
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kargl at gcc dot gnu.org changed:
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--- Comment #6 from kargl at gcc dot gnu.org ---
I have patch.
>From gcc-bugs-return-598022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 07:02:00 2018
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Subject: [Bug tree-optimization/84811] ICE on valid code at -O3 in 64-bit mode on x86_64-linux-gnu: in smallest_mode_for_size, at stor-layout.c:355
Date: Sun, 18 Mar 2018 07:02:00 -0000
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Sorry, my fault, forgot about -da, can you repeat with that option as well?
Your optimized dump is identical to my, so if there is a difference (and there
must be, because the function in question isn't called for me), it must be
during the RTL passes.
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Subject: [Bug tree-optimization/84811] ICE on valid code at -O3 in 64-bit mode on x86_64-linux-gnu: in smallest_mode_for_size, at stor-layout.c:355
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--- Comment #20 from Zhendong Su <su at cs dot ucdavis.edu> ---
Created attachment 43695
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43695&action=edit
output from "gcctk -O3 -S -da small.c"
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Subject: [Bug fortran/79929] [7 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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--- Comment #29 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Sun Mar 18 09:20:37 2018
New Revision: 258630
URL: https://gcc.gnu.org/viewcvs?rev=258630&root=gcc&view=rev
Log:
2018-03-18 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/79929
* gfortran.dg/warn_concat.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/warn_concat.f90
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/84913] ICE vectorising chained conditional reduction
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--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Sun Mar 18 10:25:29 2018
New Revision: 258631
URL: https://gcc.gnu.org/viewcvs?rev=258631&root=gcc&view=rev
Log:
Don't try to vectorise COND_EXPR reduction chains (PR 84913)
The testcase ICEd for both SVE and AVX512 because we were trying
to vectorise a chain of COND_EXPRs as a reduction and getting
confused by reduc_index == -1.
2018-03-18 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
PR tree-optimization/84913
* tree-vect-loop.c (vectorizable_reduction): Don't try to
vectorize chains of COND_EXPRs.
gcc/testsuite/
PR tree-optimization/84913
* gfortran.dg/vect/pr84913.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/vect/pr84913.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-loop.c
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Subject: [Bug tree-optimization/84913] ICE vectorising chained conditional reduction
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Patch applied.
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Subject: [Bug tree-optimization/84811] ICE on valid code at -O3 in 64-bit mode on x86_64-linux-gnu: in smallest_mode_for_size, at stor-layout.c:355
Date: Sun, 18 Mar 2018 11:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, ok, so the difference is in your case for some reason I don't understand
you get:
;; b[2180000000000000000][8] = 1;
(insn 28 27 29 (set (reg/f:DI 104)
(symbol_ref:DI ("b") [flags 0x2] <var_decl 0x7f98b10d7ea0 b>))
"small.c":9 -1
(nil))
(insn 29 28 30 (set (reg:DI 105)
(const_int 162675373468811328 [0x241f063e9500040])) "small.c":9 -1
(nil))
(insn 30 29 31 (parallel [
(set (reg/f:DI 106)
(plus:DI (reg/f:DI 104)
(reg:DI 105)))
(clobber (reg:CC 17 flags))
]) "small.c":9 -1
(nil))
(insn 31 30 0 (set (mem:DI (reg/f:DI 106) [2 b S8 A128])
(const_int 1 [0x1])) "small.c":9 -1
(nil))
while I get:
;; b[2180000000000000000][8] = 1;
(insn 28 27 29 (set (reg/f:DI 104)
(symbol_ref:DI ("b") [flags 0x2] <var_decl 0x7f9eb9c05ea0 b>))
"small.c":9 -1
(nil))
(insn 29 28 30 (set (reg:DI 105)
(const_int -9060696663385964480 [0x8241f063e9500040])) "small.c":9 -1
(nil))
(insn 30 29 31 (parallel [
(set (reg/f:DI 106)
(plus:DI (reg/f:DI 104)
(reg:DI 105)))
(clobber (reg:CC 17 flags))
]) "small.c":9 -1
(nil))
(insn 31 30 0 (set (mem:DI (reg/f:DI 106) [2 b S8 A128])
(const_int 1 [0x1])) "small.c":9 -1
(nil))
Note that the topmost bit is lost.
Anyway, if I write what I see in your dump:
int a;
long b[1][9];
typedef long V __attribute__((vector_size (16), may_alias));
void
foo ()
{
V *c = (V *) ((char *) b + -9060696663385964544);
*c = (V) { 1, 1 };
c++;
*c = (V) { 1, 1 };
c++;
*c = (V) { 1, 1 };
c++;
*c = (V) { 1, 1 };
long __attribute__((may_alias)) *d = (long *) ((char *) b +
162675373468811328);
*d = 1;
}
then I get the ICE you are getting, so I'll have a look at that.
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Subject: [Bug tree-optimization/84811] [8 Regression] ICE on valid code at -O3 in 64-bit mode on x86_64-linux-gnu: in smallest_mode_for_size, at stor-layout.c:355
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|ICE on valid code at -O3 in |[8 Regression] ICE on valid
|64-bit mode on |code at -O3 in 64-bit mode
|x86_64-linux-gnu: in |on x86_64-linux-gnu: in
|smallest_mode_for_size, at |smallest_mode_for_size, at
|stor-layout.c:355 |stor-layout.c:355
--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
On #c21 this regressed with r255692.
>From gcc-bugs-return-598029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 11:13:16 2018
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--- Comment #30 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed by revision r256284?
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Subject: [Bug c++/53281] poor error message for calling a non-const method from a const object
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
Target Milestone|--- |9.0
--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Another example, given by reddit user "agcpp" here:
https://www.reddit.com/r/cpp/comments/84op5c/usability_improvements_in_gcc_8/dvvry8y/
> I'm little late to the party but want to add another example
> where diagnostics will improve overall experience -
> https://godbolt.org/g/kGKowz
>
> The diagnostics produced by MSVC here are just perfect, clang does
> seem a bit verbose but readable otoh gcc confuses anyone who
> hasn't been writing c++ for about 5 years :D
************************************************************
Code at that godbolt link:
#include <string>
using std::string;
void func(string &s) {
s.clear();
}
int main() {
const string s = "20";
func(s);
}
************************************************************
MSVC 19 2017:
/opt/compiler-explorer/windows/19.10.25017/lib/native/include/xlocale(314):
warning C4530: C++ exception handler used, but unwind semantics are not
enabled. Specify /EHsc
<source>(10): error C2664: 'void func(std::string &)': cannot convert argument
1 from 'const std::string' to 'std::string &'
<source>(10): note: Conversion loses qualifiers
************************************************************
clang trunk:
<source>:10:5: error: no matching function for call to 'func'
func(s);
^~~~
<source>:4:6: note: candidate function not viable: 1st argument ('const
std::__cxx11::string' (aka 'const basic_string<char>')) would lose const
qualifier
void func(string &s) {
^
1 error generated.
Compiler returned: 1
************************************************************
gcc trunk:
<source>: In function 'int main()':
<source>:10:10: error: binding reference of type 'std::__cxx11::string&' {aka
'std::__cxx11::basic_string<char>&'} to 'const string' {aka 'const
std::__cxx11::basic_string<char>'} discards qualifiers
func(s);
^
<source>:4:6: note: initializing argument 1 of 'void
func(std::__cxx11::string&)'
void func(string &s) {
^~~~
Compiler returned: 1
************************************************************
Part of the verbosity here relates to PR c++/84897 (reporting std::string
rather than std::__cxx11::string).
We're emitting a 28 words/~170 chars to seemingly talk about how:
Compiler: "did you know that std::string is actually a
std::basic_string?" mumble mumble, something
about a qualifier.
where the user has to spot the most pertinent word: "const" appearing in the
2nd pair of types, absent in the 1st pair of types.
Among other issues, the aka seems redundant/unhelpful here.
It seems best to special-case the "const member fn/param called with non-const"
cases and to report them directly in terms of the types in user's source with
and without "const", and to be explicit about which qualifier(s) are lost.
We should also underline the param, or the "const" token.
Proposed output for the above:
error: binding reference of type 'std::string&' to 'const string' discards
'const' qualifier
func(s);
^
note: initializing non-'const' argument 1 of 'void func(std::string&)'
void func(string &s) {
~~~~~~~^~
(though even that is a bit "compiler-ese"; might want to talk about it being a
call up-front)
Proposed output for the case in comment #3:
cv.cc: In member function ‘void Foo::bar2(const Foo&)’:
cv.cc:4:26: error: passing ‘const Foo’ as ‘this’ argument discards 'const'
qualifier [-fpermissive]
foo.bar1();
^
cv.cc:2:14: note: in call to ‘void Foo::bar1()’ which is non-const
void bar1() {}
^~~~
I hope to fix these for gcc 9.
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Subject: [Bug c++/53281] poor error message for calling a non-const method from a const object
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--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #6)
[...]
> We should also underline the param, or the "const" token.
(actually, if the member function or param is 'const', it's not a problem, I
think. -ENOCOFFEE)
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/84890] Overly verbose notes for missing headers
Date: Sun, 18 Mar 2018 12:55:00 -0000
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
A similar sentiment to comment #1:
https://www.reddit.com/r/cpp/comments/84op5c/usability_improvements_in_gcc_8/dvu7n5e/
> I find that "did you forget to '#include" is kind of personal message
> and it's quite clear that you forget to include something otherwise
> this notification would not appear, so it's like mocking you.
>From gcc-bugs-return-598033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 13:43:07 2018
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Subject: [Bug fortran/77680] [6/7/8 Regression] [F03] ICE in ctor_for_folding, at varpool.c:419
Date: Sun, 18 Mar 2018 13:43:00 -0000
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This is now correctly rejected:
ig25@flaemmli:/tmp> cat d.f90
program p
bind(c) :: x
call s(x)
end
ig25@flaemmli:/tmp> gfortran d.f90
d.f90:2:15:
bind(c) :: x
1
Error: Variable ‘x’ at (1) cannot be BIND(C) because it is neither a COMMON
block nor declared at the module level scope
Closing.
>From gcc-bugs-return-598034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 13:45:37 2018
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Subject: [Bug fortran/71066] [6/7/8 Regression] ICE in set_loop_bounds, at fortran/trans-array.c:4680
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--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
OK, so the first example is indeed invalid.
What about the second one? I don't speak Coarray.
>From gcc-bugs-return-598035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 13:47:15 2018
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Subject: [Bug c++/84930] New: Brace-closed initialization of cstring (i.e."abcdefghi") to coresponding aggregate types fails in certain situation
Date: Sun, 18 Mar 2018 13:47:00 -0000
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Bug ID: 84930
Summary: Brace-closed initialization of cstring
(i.e."abcdefghi") to coresponding aggregate types
fails in certain situation
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We can do this in both GCC and clang
std::array<std::array<char, 10>, 2> arr_from_cstr1{{
{{"abcdefghi"}}, {{"abcdefghi"}}
}};
std::array<const char[10], 2> arr_from_cstr2{{
{"abcdefghi"}, {"abcdefghi"}
}};
std::vector<std::array<char, 10> > vec_from_direct{{
{{ 'a','b','c','d','e','f','g','h','i','\0' }},
{{ 'a','b','c','d','e','f','g','h','i','\0' }}
}};
std::vector vec_from_ctor{{
std::array<char, 10>{ {"abcdefghi"} },
std::array<char, 10>{ {"abcdefghi"} }
}};
We can't do this in GCC but can do in clang
std::vector<std::array<char,10> > vec_from_ctr1{{
{{"abcdefghi"}}, {{"abcdefghi"}}
}};
struct A {
std::array<char, 10> x;
A(std::array<char, 10> arr) : x(arr) {}
};
A struct_from_ctr1{ {{"abcdefghi"}} };
You may see the error details in CE (tested with gcc 7.3):
https://godbolt.org/g/zV6dHd
I'm sorry that I can't describe the scenario good enough.
>From gcc-bugs-return-598036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 14:00:37 2018
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Subject: [Bug fortran/79685] [6/7/8 Regression] ICE on valid code in gfc_match_structur_constructor
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--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The problem seems to be in the renaming,
the test case
module omega_color
implicit none
type omega_color_factor
integer :: i
end type
end module
module foo
use omega_color
implicit none
type(omega_color_factor) :: table_color_factors
data table_color_factors / omega_color_factor(1) /
end module
works.
>From gcc-bugs-return-598037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 15:55:10 2018
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Subject: [Bug fortran/79929] [7 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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--- Comment #31 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #30)
> Fixed by revision r256284?
r256284 is OK, r256283 fails.
We cannot backport r256284 because this is the ABI change for
long string lengths.
So, this is a candidate for "RESOLVED FIXED" unless somebody
comes up with an independent way to fix this (but frankly,
I wouldn't try to do it).
>From gcc-bugs-return-598038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 16:34:32 2018
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Subject: [Bug fortran/65453] ICE in build_function_decl, at fortran/trans-decl.c:2001
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--- Comment #3 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Mar 18 16:33:55 2018
New Revision: 258632
URL: https://gcc.gnu.org/viewcvs?rev=258632&root=gcc&view=rev
Log:
2018-03-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/65453
* decl.c (get_proc_name): Catch clash between a procedure statement
and a contained subprogram
2018-03-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/65453
* gfortran.dg/pr65453.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/pr65453.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-598039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 17:16:19 2018
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Subject: [Bug fortran/66310] Problems with intrinsic repeat for large number of copies
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #25 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Jerry DeLisle from comment #24)
> (In reply to Jerry DeLisle from comment #23)
> > Ok I see it.
> >
> > In fbuf.c (fbuf_alloc):
> >
> > /* Round up to nearest multiple of the current buffer length. */
> > newlen = ((u->fbuf->pos + len) / u->fbuf->len + 1) *u->fbuf->len;
> > u->fbuf->buf = xrealloc (u->fbuf->buf, newlen);
> > u->fbuf->len = newlen;
> >
> > We are rounding up to make sure we have enough buffer. The size newlen is
> > calculated to 2147484160 which exceeds the limit of 2147483647 and xrealloc
> > fails.
>
> There is a 2 GB limit on 32 bit processes, so this is not a bug. I suggest
> this be closed.
I concur. Closing accordingly.
>From gcc-bugs-return-598040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 17:21:38 2018
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Subject: [Bug fortran/84931] New: Expansion of array constructor with constant implied-do-object goes sideways
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84931
Bug ID: 84931
Summary: Expansion of array constructor with constant
implied-do-object goes sideways
Product: gcc
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Priority: P3
Component: fortran
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Subject: [Bug fortran/79929] [7 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #32 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
So, fixed in gcc-8, backport too invasive / not needed for gcc-7.
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Subject: [Bug fortran/84931] Expansion of array constructor with constant implied-do-object goes sideways
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-03-18
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--- Comment #1 from kargl at gcc dot gnu.org ---
The following code does the correct thing with an
integer array 'y'.
program test
implicit none
integer, parameter :: n = 65536
integer, dimension(n) :: y
integer*4 :: i
y = (/ (1, i=1, n) /)
if (y(2) /= 1) stop 1
end program test
The expansion of the array constructor is implemented by
creating a temporary array and filling it with '1'. The
temporary array is then copied into 'y'.
This however does sideways
program test
implicit none
integer, parameter :: n = 65536
real, dimension(n) :: y
integer*4 :: i
y = (/ (1, i=1, n) /)
if (y(2) /= 1) stop 1
end program test
A temporary array is created, but only the first element of
the temporary array is initialized to 1. The temporary array
is then copied into 'y', except the temporary array has not
assigned values for tmp(2:65536).
Tree dumps are here
https://gcc.gnu.org/ml/fortran/2018-03/msg00096.html
Problem found on Stack Overflow
https://stackoverflow.com/questions/49330816/strange-initialization-behavior-for-an-array-constructor-with-implied-do-in-gfor
>From gcc-bugs-return-598043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 17:47:50 2018
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Subject: [Bug fortran/66310] Problems with intrinsic repeat for large number of copies
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--- Comment #26 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I concur. Closing accordingly.
I disagree: if there is a limit, gfortran should emit an error.
>From gcc-bugs-return-598044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 17:52:36 2018
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Subject: [Bug fortran/77414] ICE in create_function_arglist, at fortran/trans-decl.c:2410
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--- Comment #7 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sun Mar 18 17:51:57 2018
New Revision: 258633
URL: https://gcc.gnu.org/viewcvs?rev=258633&root=gcc&view=rev
Log:
2018-03-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/77414
* decl.c (get_proc_name): Check for a subroutine re-defined in
the contain portion of a subroutine. Change language of existing
error message to better describe the issue. While here fix whitespace
issues.
2018-03-18 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/77414
* gfortran.dg/pr77414.f90: New test.
* gfortran.dg/internal_references_1.f90: Adjust error message.
Added:
trunk/gcc/testsuite/gfortran.dg/pr77414.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/decl.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/internal_references_1.f90
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Subject: [Bug target/84932] New: i386/cpuinfo.h:293: 4 * bad bitshifts ?
Date: Sun, 18 Mar 2018 18:09:00 -0000
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Bug ID: 84932
Summary: i386/cpuinfo.h:293: 4 * bad bitshifts ?
Product: gcc
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[trunk/libgcc/config/i386/cpuinfo.c:293]: (error) Shifting 32-bit value by 32
bits is undefined behaviour
[trunk/libgcc/config/i386/cpuinfo.c:295]: (error) Shifting 32-bit value by 33
bits is undefined behaviour
[trunk/libgcc/config/i386/cpuinfo.c:297]: (error) Shifting 32-bit value by 34
bits is undefined behaviour
[trunk/libgcc/config/i386/cpuinfo.c:299]: (error) Shifting 32-bit value by 35
bits is undefined behaviour
Source code is
if (ecx & bit_GFNI)
features |= (1 << FEATURE_GFNI);
if (ecx & bit_VPCLMULQDQ)
features |= (1 << FEATURE_VPCLMULQDQ);
if (ecx & bit_AVX512VNNI)
features |= (1 << FEATURE_AVX512VNNI);
if (ecx & bit_AVX512BITALG)
features |= (1 << FEATURE_AVX512BITALG);
There are more than 32 features. 1UL would be a better bitmask.
Local variable "features" could do with moving from int to size_t.
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Subject: [Bug fortran/84931] Expansion of array constructor with constant implied-do-object goes sideways
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.3.1 up to trunk (8.0).
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Subject: [Bug target/84932] i386/cpuinfo.h:293: 4 * bad bitshifts ?
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David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jkoval at gcc dot gnu.org
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
Revision 258551 looks related.
Maybe Julia can offer some assistance with this possible problem.
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--- Comment #27 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #26)
> > I concur. Closing accordingly.
>
> I disagree: if there is a limit, gfortran should emit an error.
Well you are hitting on an OS limit, we could put a check in the runtime but
how do we test that -m32 was used? The error message I get now is from our
memory.c:
if (p == NULL)
os_error ("Memory allocation failed");
>From gcc-bugs-return-598049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 18:57:02 2018
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Subject: [Bug tree-optimization/84933] New: [8 Regression] ICE in set_value_range, at tree-vrp.c:288 since r257852
Date: Sun, 18 Mar 2018 18:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84933
Bug ID: 84933
Summary: [8 Regression] ICE in set_value_range, at
tree-vrp.c:288 since r257852
Product: gcc
Version: unknown
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: law at gcc dot gnu.org, msebor at gcc dot gnu.org
Target Milestone: ---
Following ICEs:
$ cat /tmp/ice.ii
enum a {};
int *d;
int b, e, f;
a c, g;
class h {
virtual unsigned i();
};
class j : h {
unsigned i() {
for (;;) {
b = c <= 0;
if (b)
e = *d;
b = g && c;
if (b)
f = *d;
}
}
};
void k() { new j; }
$ gcc -fstrict-enums -O3 -fno-inline /tmp/ice.ii -c
during GIMPLE pass: printf-return-value
/tmp/ice.ii: In member function ‘virtual unsigned int j::i()’:
/tmp/ice.ii:9:12: internal compiler error: in set_value_range, at
tree-vrp.c:288
unsigned i() {
^
c0x108f87f set_value_range(value_range*, value_range_type, tree_node*,
tree_node*, bitmap_head*)
../../gcc/tree-vrp.c:288
0x108f966 set_and_canonicalize_value_range(value_range*, value_range_type,
tree_node*, tree_node*, bitmap_head*)
../../gcc/tree-vrp.c:433
0x108fffc vrp_intersect_ranges_1
../../gcc/tree-vrp.c:6297
0x108fffc vrp_intersect_ranges(value_range*, value_range*)
../../gcc/tree-vrp.c:6334
0x1112b45 vr_values::extract_range_for_var_from_comparison_expr(tree_node*,
tree_code, tree_node*, tree_node*, value_range*)
../../gcc/vr-values.c:682
0x15b8bf5 evrp_range_analyzer::try_find_new_range(tree_node*, tree_node*,
tree_code, tree_node*)
../../gcc/gimple-ssa-evrp-analyze.c:89
0x15b9a62
evrp_range_analyzer::record_ranges_from_incoming_edge(basic_block_def*)
../../gcc/gimple-ssa-evrp-analyze.c:198
0x15ba06c evrp_range_analyzer::enter(basic_block_def*)
../../gcc/gimple-ssa-evrp-analyze.c:75
0x15dc8eb before_dom_children
../../gcc/gimple-ssa-sprintf.c:4018
0x159a0d7 dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:353
0x15d567a execute
../../gcc/gimple-ssa-sprintf.c:4053
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Subject: [Bug tree-optimization/84933] [8 Regression] ICE in set_value_range, at tree-vrp.c:288 since r257852
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-18
Known to work| |7.3.0
Target Milestone|--- |8.0
Ever confirmed|0 |1
Known to fail| |8.0
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Subject: [Bug tree-optimization/84933] [8 Regression] ICE in set_value_range, at tree-vrp.c:288 since r257852
Date: Sun, 18 Mar 2018 19:08:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
--- Comment #1 from Jeffrey A. Law <law at redhat dot com> ---
Looks like a bug in vrp_intersect_ranges_1 or its children to me.
We call vrp_intersect_range_1 with:
(gdb) p debug_value_range (vr0)
~[0, 2147483647] EQUIVALENCES: { c.0_1 } (1 elements)
$16 = void
(gdb) p debug_value_range (vr1)
~[1, 2147483647] EQUIVALENCES: { c.0_1 } (1 elements)
$17 = void
Which then proceeds to call set_and_canonicalize_value_range with min/max as:
(gdb) p debug_tree (min)
<integer_cst 0x7ffff01c7af8 type <enumeral_type 0x7ffff01b39d8 a> constant
2147483648>
$18 = void
(gdb) p debug_tree (max)
<integer_cst 0x7ffff01c71b0 type <enumeral_type 0x7ffff01b39d8 a> constant 1>
$19 = void
Which looks bogus to me.
I'll have to look deeper tues/wed if nobody gets to it before then..
>From gcc-bugs-return-598052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 19:09:08 2018
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Subject: [Bug target/84932] [8 Regression] i386/cpuinfo.h:293: 4 * bad bitshifts ?
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-18
CC| |marxin at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|i386/cpuinfo.h:293: 4 * |[8 Regression]
|bad bitshifts ? |i386/cpuinfo.h:293: 4 *
| |bad bitshifts ?
Ever confirmed|0 |1
Known to fail| |8.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug tree-optimization/84929] [8 Regression] ICE at -O3 on valid code on x86_64-linux-gnu: tree check: expected polynomial_chrec, have nop_expr in analyze_siv_subscript_cst_affine, at tree-data-ref.c:3018
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |7.3.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2018-03-18
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ICE at -O3 on valid code on |[8 Regression] ICE at -O3
|x86_64-linux-gnu: tree |on valid code on
|check: expected |x86_64-linux-gnu: tree
|polynomial_chrec, have |check: expected
|nop_expr in |polynomial_chrec, have
|analyze_siv_subscript_cst_a |nop_expr in
|ffine, at |analyze_siv_subscript_cst_a
|tree-data-ref.c:3018 |ffine, at
| |tree-data-ref.c:3018
Target Milestone|--- |8.0
Known to fail| |8.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r257013.
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2018-03-18
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It will be unrelated, please attach content of --verbose for the problematic
source file.
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Subject: [Bug tree-optimization/84811] [8 Regression] ICE on valid code at -O3 in 64-bit mode on x86_64-linux-gnu: in smallest_mode_for_size, at stor-layout.c:355
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84811
--- Comment #23 from Martin Liška <marxin at gcc dot gnu.org> ---
Isn't that caused by a undefined behavior in compiler?
Can you please run it in valgrind:
valgrind --leak-check=yes --trace-children=yes ...
Can you please test it with compiler that is built w/o optimization:
make all-host -k CFLAGS="-O0 -g" CXXFLAGS="-O0 -g"
>From gcc-bugs-return-598056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 19:40:06 2018
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvODQ5MjZdIGVycm9yOiBpbmxpbmluZyBmYWlsZWQgaW4g?= =?UTF-8?B?Y2FsbCB0byBhbHdheXNfaW5saW5lIOKAmF9tbV9jcmMzMl91NjTigJk6IHRh?= =?UTF-8?B?cmdldCBzcGVjaWZpYyBvcHRpb24gbWlzbWF0Y2ggIF9tbV9jcmMzMl91NjQ=?Date: Sun, 18 Mar 2018 19:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84926
--- Comment #2 from ДилÑн Палаузов <dilyan.palauzov at aegee dot org> ---
make -C src all
make[1]: Entering directory '/git/postgresql/src'
make -C common all
make[2]: Entering directory '/git/postgresql/src/common'
make -C ../backend submake-errcodes
make[3]: Entering directory '/git/postgresql/src/backend'
make[3]: Nothing to be done for 'submake-errcodes'.
make[3]: Leaving directory '/git/postgresql/src/backend'
make[2]: Leaving directory '/git/postgresql/src/common'
make -C port all
make[2]: Entering directory '/git/postgresql/src/port'
make -C ../backend submake-errcodes
make[3]: Entering directory '/git/postgresql/src/backend'
make[3]: Nothing to be done for 'submake-errcodes'.
make[3]: Leaving directory '/git/postgresql/src/backend'
gcc -flto --verbose -I../../src/port -DFRONTEND -I../../src/include
-D_GNU_SOURCE -I/usr/local/include/libxml2 -c -o pg_crc32c_sse42.o
pg_crc32c_sse42.c
Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-pc-linux-gnu
Configured with: ./configure --enable-threads=posix --enable-nls
--enable-interpreter --with-system-zlib --enable-libgcj-multifile
--enable-languages=all --enable-targets=all --with-system-unwind --without-x
--with-linker-hash-style=gnu --disable-multilib --enable-shared
--with-build-config='bootstrap-lto bootstrap-O3'
Thread model: posix
gcc version 7.3.1 20180316 (GCC)
COLLECT_GCC_OPTIONS='-flto' '-v' '-I' '../../src/port' '-D' 'FRONTEND' '-I'
'../../src/include' '-D' '_GNU_SOURCE' '-I' '/usr/local/include/libxml2' '-c'
'-o' 'pg_crc32c_sse42.o' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc/x86_64-pc-linux-gnu/7.3.1/cc1 -quiet -v -I
../../src/port -I ../../src/include -I /usr/local/include/libxml2 -imultiarch
x86_64-linux-gnu -D FRONTEND -D _GNU_SOURCE pg_crc32c_sse42.c -quiet -dumpbase
pg_crc32c_sse42.c -mtune=generic -march=x86-64 -auxbase-strip pg_crc32c_sse42.o
-version -flto -o /tmp/cce8jOUn.s
GNU C11 (GCC) version 7.3.1 20180316 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.3.1 20180316, GMP version 6.1.2, MPFR
version 4.0.0, MPC version 1.1.0, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
../../src/port
../../src/include
/usr/local/include/libxml2
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include
/usr/local/include
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C11 (GCC) version 7.3.1 20180316 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.3.1 20180316, GMP version 6.1.2, MPFR
version 4.0.0, MPC version 1.1.0, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: e97c32a4d3c4d8b00665455dd270ad26
In file included from
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include/nmmintrin.h:31:0,
from pg_crc32c_sse42.c:19:
pg_crc32c_sse42.c: In function ‘pg_comp_crc32c_sse42’:
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include/smmintrin.h:846:1: error:
inlining failed in call to always_inline ‘_mm_crc32_u64’: target specific
option mismatch
_mm_crc32_u64 (unsigned long long __C, unsigned long long __V)
^~~~~~~~~~~~~
pg_crc32c_sse42.c:37:18: note: called from here
crc = (uint32) _mm_crc32_u64(crc, *((const uint64 *) p));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include/nmmintrin.h:31:0,
from pg_crc32c_sse42.c:19:
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include/smmintrin.h:839:1: error:
inlining failed in call to always_inline ‘_mm_crc32_u32’: target specific
option mismatch
_mm_crc32_u32 (unsigned int __C, unsigned int __V)
^~~~~~~~~~~~~
pg_crc32c_sse42.c:44:7: note: called from here
crc = _mm_crc32_u32(crc, *((const unsigned int *) p));
~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include/nmmintrin.h:31:0,
from pg_crc32c_sse42.c:19:
/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.3.1/include/smmintrin.h:827:1: error:
inlining failed in call to always_inline ‘_mm_crc32_u8’: target specific option
mismatch
_mm_crc32_u8 (unsigned int __C, unsigned char __V)
^~~~~~~~~~~~
pg_crc32c_sse42.c:63:7: note: called from here
crc = _mm_crc32_u8(crc, *p);
~~~~^~~~~~~~~~~~~~~~~~~~~~~
make[2]: *** [<builtin>: pg_crc32c_sse42.o] Error 1
make[2]: Leaving directory '/git/postgresql/src/port'
make[1]: *** [Makefile:38: all-port-recurse] Error 2
make[1]: Leaving directory '/git/postgresql/src'
make: *** [GNUmakefile:11: all-src-recurse] Error 2
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Subject: [Bug middle-end/84048] [8 Regression] FAIL: gcc.dg/torture/tls/run-ld.c -O0 -pie -fPIE execution test
Date: Sun, 18 Mar 2018 19:51:00 -0000
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--- Comment #5 from John David Anglin <danglin at gcc dot gnu.org> ---
With binutils-2.29,test passes:
https://sourceware.org/bugzilla/show_bug.cgi?id=22978
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Subject: [Bug target/84902] [8 Regression] 549.fotonik3d_r from SPEC2017 fails verification with -Ofast -march=native on Zen since r258518
Date: Sun, 18 Mar 2018 19:56:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Thank you both, works for me. Thus closing.
>From gcc-bugs-return-598059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 19:56:10 2018
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Subject: [Bug middle-end/26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
Date: Sun, 18 Mar 2018 19:56:00 -0000
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Bug 26163 depends on bug 84902, which changed state.
Bug 84902 Summary: [8 Regression] 549.fotonik3d_r from SPEC2017 fails verification with -Ofast -march=native on Zen since r258518
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84902
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
The issue is that it uses always_inline for a function that uses -msse3 and you
use -march=native and -mtune=generic.
If I configure postgres with :
CFLAGS="-mtune=generic -march=x86-64"
CXXFLAGS=...
LDFLAGS=...
then it builds fine. The file should not be built with the flags.
Clang has nicer error message:
error: always_inline function '_mm_crc32_u64' requires target feature 'ssse3',
but would be inlined into function 'pg_comp_crc32c_sse42' that is compiled
without support for 'ssse3'
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Subject: [Bug rtl-optimization/84635] gcc/regrename.c:1706:64: runtime error: index -1 out of bounds for type 'machine_mode [30]'
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Sun Mar 18 20:17:10 2018
New Revision: 258634
URL: https://gcc.gnu.org/viewcvs?rev=258634&root=gcc&view=rev
Log:
Fix UBSAN in regrename.c (PR rtl-optimization/84635).
2018-03-18 Martin Liska <mliska@suse.cz>
PR rtl-optimization/84635
* regrename.c (build_def_use): Use matches_mode only when
matches >= 0.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/regrename.c
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Subject: [Bug rtl-optimization/84635] gcc/regrename.c:1706:64: runtime error: index -1 out of bounds for type 'machine_mode [30]'
Date: Sun, 18 Mar 2018 20:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84635
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-598063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 20:22:21 2018
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From: "dilyan.palauzov at aegee dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/84934] New: Installing the lto plugin where binutils will look for it
Date: Sun, 18 Mar 2018 20:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84934
Bug ID: 84934
Summary: Installing the lto plugin where binutils will look for
it
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: dilyan.palauzov at aegee dot org
CC: marxin at gcc dot gnu.org
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For the LTO prime time to arise, "gcc/Makefile install" shall put the
liblto_plugin in a place, where the ar/ranlib/nm tools load it. They load
search for plugins in the {libdir}/bfd-plugins directory.
Currently users detect in autoconf if they will do LTO, then switch
ar/nm/ranlib to gcc-ar/gcc-nm/gcc-ranlib in order to avoid dealing with the
--plugin and because they are unaware of the bfd-plugin directory. This is
unacceptable.
There are several options:
*) ar/nm/ranlib provide a mechanism to show the directory, where they look for
plugins, and gcc installs the plugins there,
*) ar/nm/ranlib ask gcc, clang and the other compilers where they have put
their plugins.
*) gcc and binutils mutually agree on a directory where the plugins are
installed and install/read the plugins there. Assuming that both gcc and
binutils share the same value for {libdir}, being it /usr/local/lib, or
/usr/lib64, gcc could install it in {libdir}/bfd-plugins, clang can do the same
for LLVMgold.so , and then binutils don't change, as they look for the files
there.
What speaks against the third option?
>From gcc-bugs-return-598064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 20:32:10 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 lto/84934] Installing the lto plugin where binutils will look for it
Date: Sun, 18 Mar 2018 20:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84934
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think it is up to the distro/installer themselves to install the plugin in
the correct location. Binutils might be installed in a fully differently
directory structure as gcc is.
>From gcc-bugs-return-598065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 20:42:07 2018
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From: "dilyan.palauzov at aegee dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/84934] Installing the lto plugin where binutils will look for it
Date: Sun, 18 Mar 2018 20:42:00 -0000
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--- Comment #2 from ДилÑн Палаузов <dilyan.palauzov at aegee dot org> ---
Builind a linux from scratch system, doing everywhere "./configure && make
install" shall work, taking all defaults into account. For gcc+LTO+binutils
this does not work. While distros can adjust the exact location, for binutils
doing "./configure && make install" the location is
"/usr/local/bin/bfd-plugins/", so with gcc's "./configure && make install "
this location shall be used by default.
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Subject: [Bug tree-optimization/84935] New: FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
Date: Sun, 18 Mar 2018 20:58:00 -0000
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Bug ID: 84935
Summary: FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump
optimized "return 285;"
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Host: hppa64-hp-hpux11.11
Target: hppa64-hp-hpux11.11
Build: hppa64-hp-hpux11.11
Executing on host: /test/gnu/gcc/objdir/gcc/xgcc -B/test/gnu/gcc/objdir/gcc/
/te
st/gnu/gcc/gcc/gcc/testsuite/gcc.dg/tree-ssa/pr84512.c
-fno-diagnostics-show-c
aret -fdiagnostics-color=never -O3 -fdump-tree-optimized -S -o pr84512.s
(timeout = 300)
spawn /test/gnu/gcc/objdir/gcc/xgcc -B/test/gnu/gcc/objdir/gcc/
/test/gnu/gcc/gc
c/gcc/testsuite/gcc.dg/tree-ssa/pr84512.c -fno-diagnostics-show-caret
-fdiagnost
ics-color=never -O3 -fdump-tree-optimized -S -o pr84512.s
PASS: gcc.dg/tree-ssa/pr84512.c (test for excess errors)
FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
>From gcc-bugs-return-598067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 21:11:09 2018
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Subject: [Bug c++/84936] New: [8 Regression] ICE with unexpanded parameter pack
Date: Sun, 18 Mar 2018 21:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84936
Bug ID: 84936
Summary: [8 Regression] ICE with unexpanded parameter pack
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
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Priority: P3
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The following invalid code snippet triggers an ICE on trunk:
==========================================================
struct A
{
template<typename... T> A(T... t) : decltype(t)() {}
};
A a;
==========================================================
bug.cc: In instantiation of 'A::A(T ...) [with T = {}]':
bug.cc:6:3: required from here
bug.cc:3:51: internal compiler error: Segmentation fault
template<typename... T> A(T... t) : decltype(t)() {}
^
0xebab0f crash_signal
../../gcc/gcc/toplev.c:325
0x9d5e09 invalid_nonstatic_memfn_p(unsigned int, tree_node*, int)
../../gcc/gcc/cp/typeck.c:1882
0x9b2529 finish_decltype_type(tree_node*, bool, int)
../../gcc/gcc/cp/semantics.c:8734
0x975ed5 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14580
0x96ed2f tsubst_initializer_list
../../gcc/gcc/cp/pt.c:23825
0x96ed2f tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16213
0x96d6cf tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16489
0x96c868 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc/gcc/cp/pt.c:16193
0x96c868 instantiate_decl(tree_node*, bool, bool)
../../gcc/gcc/cp/pt.c:23575
0x99146b instantiate_pending_templates(int)
../../gcc/gcc/cp/pt.c:23691
0x8b760b c_parse_final_cleanups()
../../gcc/gcc/cp/decl2.c:4721
Please submit a full bug report, [etc.]
The regression was introduced between 2017-05-06 and 2017-05-12.
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From: "mikael at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84931] Expansion of array constructor with constant implied-do-object goes sideways
Date: Sun, 18 Mar 2018 21:25:00 -0000
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Mikael Morin <mikael at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mikael at gcc dot gnu.org
--- Comment #3 from Mikael Morin <mikael at gcc dot gnu.org> ---
Note that gfc_trans_assignment has short-circuit code to specifically handle
"simple" assignment such as assignment from an array constructor.
This may explain the difference between the integer and real version: they use
a completely different code path.
>From gcc-bugs-return-598069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 21:40:00 2018
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From: "reichelt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/84937] New: [7/8 Regression] ICE with class template argument deduction and auto
Date: Sun, 18 Mar 2018 21:39:00 -0000
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Bug ID: 84937
Summary: [7/8 Regression] ICE with class template argument
deduction and auto
Product: gcc
Version: 8.0.1
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The following valid code snippet (compiled with "-std=c++17")
triggers an ICE since GCC 7.1.0:
==================================
template<int, int> struct A {};
template<int I> struct B
{
template<auto J> B(A<I,J>);
};
B b(A<0,0>{});
==================================
bug.cc: In substitution of 'template<int I, auto J> B(A<I, J>)-> B<I> [with int
I = <missing>; auto J = <missing>]':
bug.cc:8:13: required from here
bug.cc:8:13: internal compiler error: in tsubst, at cp/pt.c:14007
B b(A<0,0>{});
^
0x643561 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:14007
0x9699e8 unify
../../gcc/gcc/cp/pt.c:21239
0x968f44 unify
../../gcc/gcc/cp/pt.c:21434
0x989312 try_class_unification
../../gcc/gcc/cp/pt.c:20439
0x968fc5 unify
../../gcc/gcc/cp/pt.c:21471
0x985d13 unify_one_argument
../../gcc/gcc/cp/pt.c:19681
0x989763 type_unification_real
../../gcc/gcc/cp/pt.c:19801
0x98be55 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, bool, bool)
../../gcc/gcc/cp/pt.c:19186
0x82af2f add_template_candidate_real
../../gcc/gcc/cp/call.c:3179
0x82b940 add_template_candidate
../../gcc/gcc/cp/call.c:3258
0x82b940 add_candidates
../../gcc/gcc/cp/call.c:5523
0x82bd61 add_candidates
../../gcc/gcc/cp/call.c:4195
0x82bd61 perform_overload_resolution
../../gcc/gcc/cp/call.c:4203
0x82dde2 build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/gcc/cp/call.c:4276
0x967298 do_class_deduction
../../gcc/gcc/cp/pt.c:26163
0x967298 do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
../../gcc/gcc/cp/pt.c:26218
0x89e733 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc/gcc/cp/decl.c:6909
0x93b893 cp_parser_init_declarator
../../gcc/gcc/cp/parser.c:19723
0x942cc8 cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:13057
0x943ad8 cp_parser_block_declaration
../../gcc/gcc/cp/parser.c:12882
Please submit a full bug report, [etc.]
>From gcc-bugs-return-598070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 21:53:22 2018
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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/84931] Expansion of array constructor with constant implied-do-object goes sideways
Date: Sun, 18 Mar 2018 21:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84931
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |tkoenig at gcc dot gnu.org
--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Let's see.
>From gcc-bugs-return-598071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 21:59:44 2018
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82992] ICE in create_int_parameter_array, at fortran/module.c:6586
Date: Sun, 18 Mar 2018 21:59:00 -0000
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--- Comment #5 from Harald Anlauf <anlauf at gmx dot de> ---
Adding 'implicit none' after the use statements:
subroutine sub (c_int)
use iso_c_binding, only: c_int
implicit none ! makes no difference
end
-> still no error message
module pr82992
integer :: x
end module pr82992
subroutine sub (x)
use pr82992, only : x
implicit none ! -> Error: Symbol 'x' at (1) has no IMPLICIT type
end
-> gives wrong/misleading error message
pr82992c.f90:4:17:
subroutine sub (x)
1
Error: Symbol 'x' at (1) has no IMPLICIT type
>From gcc-bugs-return-598072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 22:36:24 2018
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From: "vegard.nossum at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84938] New: internal compiler error: in gen_reg_rtx, at emit-rtl.c:1187 (gen_reg_rtx()/maybe_legitimize_operand())
Date: Sun, 18 Mar 2018 22:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84938
Bug ID: 84938
Summary: internal compiler error: in gen_reg_rtx, at
emit-rtl.c:1187
(gen_reg_rtx()/maybe_legitimize_operand())
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
int &&a = 1 / ~-1ULL;
Output:
$ cc1plus
<stdin>:1:13: warning: division by zero [-Wdiv-by-zero]
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<targetclone> <free-fnsummary> <whole-program> <fnsummary> <inline>
<free-fnsummary> <single-use> <comdats>Assembling functions:
<materialize-all-clones> <simdclone><stdin>:1:21: internal compiler error: in
gen_reg_rtx, at emit-rtl.c:1187
0x1d84b67 gen_reg_rtx(machine_mode)
/home/vegard/git/gcc/gcc/emit-rtl.c:1187
0x2b0ee4c maybe_legitimize_operand
/home/vegard/git/gcc/gcc/optabs.c:7143
0x2b0ee4c maybe_legitimize_operands(insn_code, unsigned int, unsigned int,
expand_operand*)
/home/vegard/git/gcc/gcc/optabs.c:7222
0x2b0ee4c maybe_gen_insn(insn_code, unsigned int, expand_operand*)
/home/vegard/git/gcc/gcc/optabs.c:7240
0x2b0ee4c expand_unop_direct
/home/vegard/git/gcc/gcc/optabs.c:2695
0x2b07681 expand_unop(machine_mode, optab_tag, rtx_def*, rtx_def*, int)
/home/vegard/git/gcc/gcc/optabs.c:2737
0x1edee2a expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/home/vegard/git/gcc/gcc/expr.c:9222
0x1e76836 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/home/vegard/git/gcc/gcc/expr.c:11286
0x1eb0674 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
/home/vegard/git/gcc/gcc/expr.c:8227
0x1eb0674 expand_expr
/home/vegard/git/gcc/gcc/expr.h:276
0x1eb0674 expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
/home/vegard/git/gcc/gcc/expr.c:7825
0x1edc677 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/home/vegard/git/gcc/gcc/expr.c:8971
0x1e76836 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/home/vegard/git/gcc/gcc/expr.c:11286
0x41d9f62 expand_expr
/home/vegard/git/gcc/gcc/expr.h:276
0x41d9f62 output_constant
/home/vegard/git/gcc/gcc/varasm.c:4907
0x41dcc2b assemble_variable_contents
/home/vegard/git/gcc/gcc/varasm.c:2136
0x41fd542 assemble_variable(tree_node*, int, int, int)
/home/vegard/git/gcc/gcc/varasm.c:2312
0x4218599 varpool_node::assemble_decl()
/home/vegard/git/gcc/gcc/varpool.c:590
0x19a9497 output_in_order
/home/vegard/git/gcc/gcc/cgraphunit.c:2385
0x19a9497 symbol_table::compile()
/home/vegard/git/gcc/gcc/cgraphunit.c:2623
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
Possibly related: bug #70420, bug #78380
Clang complains about UB (division by zero) but does compiles it.
>From gcc-bugs-return-598073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 22:44:01 2018
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Subject: =?UTF-8?B?W0J1ZyB0cmVlLW9wdGltaXphdGlvbi83MTQ4NV0gZysrIElDRSBvbiB4ODZf?= =?UTF-8?B?NjQtbGludXgtZ251IGluIOKAnGdpbXBsaWZ5X2V4cHLigJ0=?Date: Sun, 18 Mar 2018 22:44:00 -0000
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Vegard Nossum <vegard.nossum at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vegard.nossum at gmail dot com
--- Comment #2 from Vegard Nossum <vegard.nossum at gmail dot com> ---
This does not ICE for me with either 7.1 or trunk on godbolt.org (but 6.3 has
"confused by earlier errors, bailing out"), nor with 8.0.1 compiled with checks
enabled, so maybe it has been fixed?
>From gcc-bugs-return-598074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 22:48:51 2018
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From: "vegard.nossum at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84939] New: internal compiler error: in gimplify_expr, at gimplify.c:12382
Date: Sun, 18 Mar 2018 22:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84939
Bug ID: 84939
Summary: internal compiler error: in gimplify_expr, at
gimplify.c:12382
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
struct a {
void b() {
struct c {
int d struct d e(decltype(d));
};
}
a() { (sizeof(char[static_cast<char &&>(d)])); }
} f;
Output:
$ cc1plus
void a::b()
<stdin>:4:11: error: expected ';' at end of member declaration
a::a() a::a() a::a() void __static_initialization_and_destruction_0(int, int)
void _GLOBAL__sub_I_f()
Analyzing compilation unit
<stdin>: In constructor 'a::a()':
<stdin>:7:43: internal compiler error: in gimplify_expr, at gimplify.c:12382
0x222617f gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:12382
0x2219625 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11375
0x2218312 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11556
0x2238683 gimplify_compound_lval
/home/vegard/git/gcc/gcc/gimplify.c:2969
0x22191c9 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11387
0x2219625 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11375
0x227604c gimplify_modify_expr
/home/vegard/git/gcc/gcc/gimplify.c:5626
0x221b0e6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11435
0x221b493 gimplify_target_expr
/home/vegard/git/gcc/gcc/gimplify.c:6577
0x221b493 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11815
0x2219625 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11375
0x2218f62 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:12159
0x227604c gimplify_modify_expr
/home/vegard/git/gcc/gcc/gimplify.c:5626
0x221b0e6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11435
0x2228401 gimplify_stmt(tree_node**, gimple**)
/home/vegard/git/gcc/gcc/gimplify.c:6658
0x221a50d gimplify_cleanup_point_expr
/home/vegard/git/gcc/gcc/gimplify.c:6400
0x221a50d gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11811
0x2228401 gimplify_stmt(tree_node**, gimple**)
/home/vegard/git/gcc/gcc/gimplify.c:6658
0x221bc6b gimplify_statement_list
/home/vegard/git/gcc/gcc/gimplify.c:1767
0x221bc6b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/vegard/git/gcc/gcc/gimplify.c:11863
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.
Version:
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From: "vegard.nossum at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84940] New: internal compiler error: in build_value_init_noctor, at cp/init.c:465
Date: Sun, 18 Mar 2018 22:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84940
Bug ID: 84940
Summary: internal compiler error: in build_value_init_noctor,
at cp/init.c:465
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
int b;
void c() {
struct {
} a[__builtin_constant_p(0)][b](-a[0])
}
Output:
$ cc1plus
void c()
<stdin>:4:39: error: wrong type argument to unary minus
<stdin>:4:39: internal compiler error: in build_value_init_noctor, at
cp/init.c:465
0xcf8133 build_value_init_noctor(tree_node*, int)
/home/vegard/git/gcc/gcc/cp/init.c:465
0xcf8474 build_value_init(tree_node*, int)
/home/vegard/git/gcc/gcc/cp/init.c:378
0xa429f6 cxx_eval_array_reference
/home/vegard/git/gcc/gcc/cp/constexpr.c:2472
0xa2f3d0 cxx_eval_constant_expression
/home/vegard/git/gcc/gcc/cp/constexpr.c:4475
0xa4996a cxx_eval_outermost_constant_expr
/home/vegard/git/gcc/gcc/cp/constexpr.c:4832
0xa57256 maybe_constant_value(tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/cp/constexpr.c:5049
0xab6bea cp_fully_fold(tree_node*)
/home/vegard/git/gcc/gcc/cp/cp-gimplify.c:2041
0x1273a47 finish_unary_op_expr(unsigned int, tree_code, cp_expr, int)
/home/vegard/git/gcc/gcc/cp/semantics.c:2679
0xf2a14f cp_parser_unary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:8303
0xebfeca cp_parser_cast_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9090
0xec24f6 cp_parser_binary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9191
0xec62ca cp_parser_assignment_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9486
0xecc0a3 cp_parser_constant_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9770
0xed376b cp_parser_parenthesized_expression_list
/home/vegard/git/gcc/gcc/cp/parser.c:7758
0xedc2bc cp_parser_initializer
/home/vegard/git/gcc/gcc/cp/parser.c:21864
0xfa0f3d cp_parser_init_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:19677
0xfa57a7 cp_parser_simple_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:13065
0xfab998 cp_parser_block_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:12883
0xfade64 cp_parser_declaration_statement
/home/vegard/git/gcc/gcc/cp/parser.c:12476
0xefab2b cp_parser_statement
/home/vegard/git/gcc/gcc/cp/parser.c:10925
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
Possibly related to bug #80812?
>From gcc-bugs-return-598076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 22:54:32 2018
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From: "vegard.nossum at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84941] New: internal compiler error: in reg_overlap_mentioned_p, at rtlanal.c:1870 (reg_overlap_mentioned_p()/match_asm_constraints_1())
Date: Sun, 18 Mar 2018 22:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84941
Bug ID: 84941
Summary: internal compiler error: in reg_overlap_mentioned_p,
at rtlanal.c:1870
(reg_overlap_mentioned_p()/match_asm_constraints_1())
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
struct a {
~a() {
short *b[]{0};
asm("" : "=m"(b), "=d"(b) : "1p"(b));
}
} b;
Output:
$ cc1plus -O2
a::~a() a::~a() a::~a() void __static_initialization_and_destruction_0(int,
int) void _GLOBAL__sub_I_b()
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<targetclone> <free-fnsummary> <whole-program> <profile_estimate> <icf>
<devirt> <cp> <fnsummary> <inline> <pure-const> <free-fnsummary> <static-var>
<single-use> <comdats>Assembling functions:
<materialize-all-clones> <simdclone> a::~a()during RTL pass: asmcons
<stdin>: In destructor 'a::~a()':
<stdin>:5:3: internal compiler error: in reg_overlap_mentioned_p, at
rtlanal.c:1870
0x2f0c0e7 reg_overlap_mentioned_p(rtx_def const*, rtx_def const*)
/home/vegard/git/gcc/gcc/rtlanal.c:1870
0x2002163 match_asm_constraints_1
/home/vegard/git/gcc/gcc/function.c:6720
0x2005f43 execute
/home/vegard/git/gcc/gcc/function.c:6800
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
Actually compiles at -O0, get the ICE at -O1.
>From gcc-bugs-return-598077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 22:58:03 2018
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From: "vegard.nossum at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84942] New: internal compiler error: in fold_convert_const_int_from_real, at fold-const.c:2011
Date: Sun, 18 Mar 2018 22:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84942
Bug ID: 84942
Summary: internal compiler error: in
fold_convert_const_int_from_real, at fold-const.c:2011
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
a(__attribute__((b((int)__builtin_inf() * 1ULL / auto))))
Output:
$ cc1plus
<stdin>:1:41: internal compiler error: in fold_convert_const_int_from_real, at
fold-const.c:2011
0x1f571ab fold_convert_const_int_from_real
/home/vegard/git/gcc/gcc/fold-const.c:2011
0x1f571ab fold_convert_const
/home/vegard/git/gcc/gcc/fold-const.c:2257
0x1fc4255 const_unop(tree_code, tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/fold-const.c:1729
0x1f9aff4 fold_unary_loc(unsigned int, tree_code, tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/fold-const.c:7737
0x1fa2321 fold_build1_loc(unsigned int, tree_code, tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/fold-const.c:12282
0xa34f93 cxx_eval_constant_expression
/home/vegard/git/gcc/gcc/cp/constexpr.c:4638
0xa4996a cxx_eval_outermost_constant_expr
/home/vegard/git/gcc/gcc/cp/constexpr.c:4832
0xa57256 maybe_constant_value(tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/cp/constexpr.c:5049
0xab6bea cp_fully_fold(tree_node*)
/home/vegard/git/gcc/gcc/cp/cp-gimplify.c:2041
0x13cf877 cp_build_binary_op(unsigned int, tree_code, tree_node*, tree_node*,
int)
/home/vegard/git/gcc/gcc/cp/typeck.c:5391
0x940727 build_new_op_1
/home/vegard/git/gcc/gcc/cp/call.c:6017
0x944116 build_new_op(unsigned int, tree_code, int, tree_node*, tree_node*,
tree_node*, tree_node**, int)
/home/vegard/git/gcc/gcc/cp/call.c:6062
0x1392a6b build_x_binary_op(unsigned int, tree_code, tree_node*, tree_code,
tree_node*, tree_code, tree_node**, int)
/home/vegard/git/gcc/gcc/cp/typeck.c:4032
0x10f0d9c tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/vegard/git/gcc/gcc/cp/pt.c:17546
0xa5796a fold_non_dependent_expr(tree_node*)
/home/vegard/git/gcc/gcc/cp/constexpr.c:5102
0x105112f build_non_dependent_expr(tree_node*)
/home/vegard/git/gcc/gcc/cp/pt.c:25305
0x13933bf build_x_binary_op(unsigned int, tree_code, tree_node*, tree_code,
tree_node*, tree_code, tree_node**, int)
/home/vegard/git/gcc/gcc/cp/typeck.c:4024
0xec484b cp_parser_binary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9356
0xec62ca cp_parser_assignment_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9486
0xed4304 cp_parser_parenthesized_expression_list
/home/vegard/git/gcc/gcc/cp/parser.c:7764
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
>From gcc-bugs-return-598078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Mar 18 23:02:28 2018
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From: "vegard.nossum at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84943] New: internal compiler error: in build_call_a, at cp/call.c:374
Date: Sun, 18 Mar 2018 23:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84943
Bug ID: 84943
Summary: internal compiler error: in build_call_a, at
cp/call.c:374
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at gmail dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
void a() { a[0]() }
Output:
$ cc1plus
void a()
<stdin>:1:15: warning: pointer to a function used in arithmetic
[-Wpointer-arith]
<stdin>:1:17: internal compiler error: in build_call_a, at cp/call.c:374
0x8bd3d7 build_call_a(tree_node*, int, tree_node**)
/home/vegard/git/gcc/gcc/cp/call.c:372
0x8c7d79 build_cxx_call(tree_node*, int, tree_node**, int)
/home/vegard/git/gcc/gcc/cp/call.c:8663
0x13f7f75 cp_build_function_call_vec(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
/home/vegard/git/gcc/gcc/cp/typeck.c:3775
0x127d98e finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**,
bool, bool, int)
/home/vegard/git/gcc/gcc/cp/semantics.c:2521
0xf77968 cp_parser_postfix_expression
/home/vegard/git/gcc/gcc/cp/parser.c:7246
0xf2a4b7 cp_parser_unary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:8322
0xebfeca cp_parser_cast_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9090
0xec24f6 cp_parser_binary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9191
0xec62ca cp_parser_assignment_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9486
0xeca236 cp_parser_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9655
0xede7b6 cp_parser_expression_statement
/home/vegard/git/gcc/gcc/cp/parser.c:11131
0xefa0e0 cp_parser_statement
/home/vegard/git/gcc/gcc/cp/parser.c:10935
0xefe5eb cp_parser_statement_seq_opt
/home/vegard/git/gcc/gcc/cp/parser.c:11274
0xeff08a cp_parser_compound_statement
/home/vegard/git/gcc/gcc/cp/parser.c:11228
0xf9283b cp_parser_function_body
/home/vegard/git/gcc/gcc/cp/parser.c:21778
0xf9283b cp_parser_ctor_initializer_opt_and_function_body
/home/vegard/git/gcc/gcc/cp/parser.c:21813
0xf9ba45 cp_parser_function_definition_after_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:26818
0xfa209d cp_parser_function_definition_from_specifiers_and_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:26735
0xfa209d cp_parser_init_declarator
/home/vegard/git/gcc/gcc/cp/parser.c:19502
0xfa57a7 cp_parser_simple_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:13065
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
The error itself looks VERY similar to bug #67533 but the code is sufficiently
different that I think it might be a different underlying problem so I'm
opening a new bug.
>From gcc-bugs-return-598079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 07:05:13 2018
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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/84931] Expansion of array constructor with constant implied-do-object goes sideways
Date: Mon, 19 Mar 2018 07:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84931
--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Mon Mar 19 07:04:35 2018
New Revision: 258641
URL: https://gcc.gnu.org/viewcvs?rev=258641&root=gcc&view=rev
Log:
2018-03-19 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/84931
* simplify.c (gfc_convert_constant): Correctly handle iterators
for type conversion.
2018-03-19 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/84931
* gfortran.dg/array_constructor_52.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/array_constructor_52.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/simplify.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/84938] [7/8 Regression] internal compiler error: in gen_reg_rtx, at emit-rtl.c:1187 (gen_reg_rtx()/maybe_legitimize_operand())
Date: Mon, 19 Mar 2018 07:18:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-19
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |7.4
Summary|internal compiler error: in |[7/8 Regression] internal
|gen_reg_rtx, at |compiler error: in
|emit-rtl.c:1187 |gen_reg_rtx, at
|(gen_reg_rtx()/maybe_legiti |emit-rtl.c:1187
|mize_operand()) |(gen_reg_rtx()/maybe_legiti
| |mize_operand())
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. r241531.
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Subject: [Bug c++/84939] [6/7/8 Regression] internal compiler error: in gimplify_expr, at gimplify.c:12382
Date: Mon, 19 Mar 2018 07:29:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.5
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Subject: [Bug c++/84939] [6/7/8 Regression] internal compiler error: in gimplify_expr, at gimplify.c:12382
Date: Mon, 19 Mar 2018 07:29:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-19
CC| |mpolacek at gcc dot gnu.org
Summary|internal compiler error: in |[6/7/8 Regression] internal
|gimplify_expr, at |compiler error: in
|gimplify.c:12382 |gimplify_expr, at
| |gimplify.c:12382
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
r210692
>From gcc-bugs-return-598083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 07:30:35 2018
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Subject: [Bug c++/84939] [6/7/8 Regression] internal compiler error: in gimplify_expr, at gimplify.c:12382
Date: Mon, 19 Mar 2018 07:30:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
G++ 4.9 says:
84939.C:8:46: warning: taking sizeof array of runtime bound [-Wvla]
a() { (sizeof(char[static_cast<char &&>(d)])); }
^
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Subject: =?UTF-8?B?W0J1ZyB0cmVlLW9wdGltaXphdGlvbi83MTQ4NV0gZysrIElDRSBvbiB4ODZf?= =?UTF-8?B?NjQtbGludXgtZ251IGluIOKAnGdpbXBsaWZ5X2V4cHLigJ0=?Date: Mon, 19 Mar 2018 07:40:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |mpolacek at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed by r246034.
>From gcc-bugs-return-598085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 07:41:58 2018
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Subject: [Bug target/84944] New: UBSAN: gcc/optabs.c:6550:26: runtime error: load of value 131075, which is not a valid value for type 'memmodel'
Date: Mon, 19 Mar 2018 07:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84944
Bug ID: 84944
Summary: UBSAN: gcc/optabs.c:6550:26: runtime error: load of
value 131075, which is not a valid value for type
'memmodel'
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
$ UBSAN_OPTIONS="print_stacktrace=1 halt_on_error=1" ./xgcc -B.
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.target/i386/hle-clear-rel.c
../../gcc/optabs.c:6550:26: runtime error: load of value 131075, which is not a
valid value for type 'memmodel'
#0 0x186dc79 in expand_atomic_store(rtx_def*, rtx_def*, memmodel, bool)
../../gcc/optabs.c:6550
#1 0x9f34ab in expand_builtin_atomic_clear ../../gcc/builtins.c:6352
#2 0xa15c41 in expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode,
int) ../../gcc/builtins.c:7644
#3 0xf5c974 in expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool) ../../gcc/expr.c:10999
#4 0xaa6132 in expand_expr ../../gcc/expr.h:276
#5 0xaa6132 in expand_call_stmt ../../gcc/cfgexpand.c:2690
#6 0xaa6132 in expand_gimple_stmt_1 ../../gcc/cfgexpand.c:3624
#7 0xaa6132 in expand_gimple_stmt ../../gcc/cfgexpand.c:3790
#8 0xaabfe9 in expand_gimple_basic_block ../../gcc/cfgexpand.c:5819
#9 0xac4f59 in execute ../../gcc/cfgexpand.c:6425
#10 0x18f5250 in execute_one_pass(opt_pass*) ../../gcc/passes.c:2497
#11 0x18f85bb in execute_pass_list_1 ../../gcc/passes.c:2586
#12 0x18f8674 in execute_pass_list(function*, opt_pass*)
../../gcc/passes.c:2597
#13 0xbe01ae in cgraph_node::expand() ../../gcc/cgraphunit.c:2139
#14 0xbe4fed in output_in_order ../../gcc/cgraphunit.c:2381
#15 0xbe4fed in symbol_table::compile() ../../gcc/cgraphunit.c:2623
#16 0xbeee87 in symbol_table::compile() ../../gcc/cgraphunit.c:2720
#17 0xbeee87 in symbol_table::finalize_compilation_unit()
../../gcc/cgraphunit.c:2717
#18 0x1d10338 in compile_file ../../gcc/toplev.c:480
#19 0x639d9c in do_compile ../../gcc/toplev.c:2132
#20 0x639d9c in toplev::main(int, char**) ../../gcc/toplev.c:2267
#21 0x63c7fa in main ../../gcc/main.c:39
#22 0x7ffff5cafa86 in __libc_start_main (/lib64/libc.so.6+0x21a86)
#23 0x63c929 in _start
(/home/marxin/Programming/gcc/objdir2/gcc/cc1+0x63c929)
It's caused by fact that
#define IX86_HLE_ACQUIRE (1 << 16)
#define IX86_HLE_RELEASE (1 << 17)
are not defined in memmodel enum.
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Subject: [Bug c++/84940] [7/8 Regression] internal compiler error: in build_value_init_noctor, at cp/init.c:465
Date: Mon, 19 Mar 2018 07:44:00 -0000
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What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-19
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |7.4
Summary|internal compiler error: in |[7/8 Regression] internal
|build_value_init_noctor, at |compiler error: in
|cp/init.c:465 |build_value_init_noctor, at
| |cp/init.c:465
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug target/84944] UBSAN: gcc/optabs.c:6550:26: runtime error: load of value 131075, which is not a valid value for type 'memmodel'
Date: Mon, 19 Mar 2018 07:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84944
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 84643 ***
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Subject: [Bug rtl-optimization/84643] gcc/optabs.c:6549:26: runtime error: load of value 131075, which is not a valid value for type 'memmodel'
Date: Mon, 19 Mar 2018 07:46:00 -0000
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
It's caused by fact that
#define IX86_HLE_ACQUIRE (1 << 16)
#define IX86_HLE_RELEASE (1 << 17)
are not defined in memmodel enum.
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Subject: [Bug rtl-optimization/84643] gcc/optabs.c:6549:26: runtime error: load of value 131075, which is not a valid value for type 'memmodel'
Date: Mon, 19 Mar 2018 07:46:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 84944 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/84940] [7/8 Regression] internal compiler error: in build_value_init_noctor, at cp/init.c:465
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
r239267
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Subject: [Bug c++/84941] internal compiler error: in reg_overlap_mentioned_p, at rtlanal.c:1870 (reg_overlap_mentioned_p()/match_asm_constraints_1())
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
4.6 ICEs too.
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Subject: [Bug target/84945] New: UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
Date: Mon, 19 Mar 2018 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84945
Bug ID: 84945
Summary: UBSAN: gcc/config/i386/i386.c:33312:22: runtime error:
shift exponent 32 is too large for 32-bit type 'int'
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Blocks: 63426
Target Milestone: ---
Following causes an UBSAN:
$ cat tc.i
void a() { __builtin_cpu_supports ("gfni"); }
$ ./xgcc -B. tc.i
../../gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too
large for 32-bit type 'int'
#0 0x2a7434e in fold_builtin_cpu ../../gcc/config/i386/i386.c:33312
#1 0x2a76664 in ix86_fold_builtin ../../gcc/config/i386/i386.c:33334
#2 0x10055ba in fold_build_call_array_loc(unsigned int, tree_node*,
tree_node*, int, tree_node**) ../../gcc/fold-const.c:12450
#3 0x73a5b7 in build_function_call_vec(unsigned int, vec<unsigned int,
va_heap, vl_ptr>, tree_node*, vec<tree_node*, va_gc, vl_embed>*,
vec<tree_node*, va_gc, vl_embed>*) ../../gcc/c/c-typeck.c:3124
#4 0x7b018f in c_parser_postfix_expression_after_primary
../../gcc/c/c-parser.c:9155
#5 0x776898 in c_parser_postfix_expression ../../gcc/c/c-parser.c:8980
#6 0x7998ca in c_parser_unary_expression ../../gcc/c/c-parser.c:7260
#7 0x79c22a in c_parser_cast_expression ../../gcc/c/c-parser.c:7104
#8 0x79ca1b in c_parser_binary_expression ../../gcc/c/c-parser.c:6907
#9 0x79fe76 in c_parser_conditional_expression ../../gcc/c/c-parser.c:6645
#10 0x7a108b in c_parser_expr_no_commas ../../gcc/c/c-parser.c:6562
#11 0x7a15fe in c_parser_expression ../../gcc/c/c-parser.c:9292
#12 0x7aad13 in c_parser_expression_conv ../../gcc/c/c-parser.c:9325
#13 0x7d43f7 in c_parser_statement_after_labels ../../gcc/c/c-parser.c:5540
#14 0x7dac3c in c_parser_compound_statement_nostart
../../gcc/c/c-parser.c:5078
#15 0x7dc332 in c_parser_compound_statement ../../gcc/c/c-parser.c:4912
#16 0x7df56e in c_parser_declaration_or_fndef ../../gcc/c/c-parser.c:2341
#17 0x7f9e10 in c_parser_external_declaration ../../gcc/c/c-parser.c:1643
#18 0x7fbd61 in c_parser_translation_unit ../../gcc/c/c-parser.c:1524
#19 0x7fbd61 in c_parse_file() ../../gcc/c/c-parser.c:18411
#20 0x8ebe43 in c_common_parse_file() ../../gcc/c-family/c-opts.c:1132
#21 0x1d0fdfa in compile_file ../../gcc/toplev.c:455
#22 0x639d9c in do_compile ../../gcc/toplev.c:2132
#23 0x639d9c in toplev::main(int, char**) ../../gcc/toplev.c:2267
#24 0x63c7fa in main ../../gcc/main.c:39
#25 0x7ffff5cafa86 in __libc_start_main (/lib64/libc.so.6+0x21a86)
#26 0x63c929 in _start
(/home/marxin/Programming/gcc/objdir2/gcc/cc1+0x63c929)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
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Subject: [Bug c++/84942] [6/7/8 Regression] internal compiler error: in fold_convert_const_int_from_real, at fold-const.c:2011
Date: Mon, 19 Mar 2018 07:57:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-19
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |6.5
Summary|internal compiler error: in |[6/7/8 Regression] internal
|fold_convert_const_int_from |compiler error: in
|_real, at fold-const.c:2011 |fold_convert_const_int_from
| |_real, at fold-const.c:2011
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r230365.
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Subject: [Bug c++/84943] [8 Regression] internal compiler error: in build_call_a, at cp/call.c:374
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-19
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|internal compiler error: in |[8 Regression] internal
|build_call_a, at |compiler error: in
|cp/call.c:374 |build_call_a, at
| |cp/call.c:374
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r254712.
Better:
void a() { a[0](); }
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Subject: [Bug tree-optimization/84946] New: UBSAN: in mem_valid_for_store_merging ../../gcc/gimple-ssa-store-merging.c:3951
Date: Mon, 19 Mar 2018 08:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84946
Bug ID: 84946
Summary: UBSAN: in mem_valid_for_store_merging
../../gcc/gimple-ssa-store-merging.c:3951
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Following causes UBSAN:
$ ./xgcc -B. -mavx512f -O2
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr82389.c
../../gcc/poly-int.h:845:5: runtime error: signed integer overflow:
9223372034573074432 + 8589934592 cannot be represented in type 'long int'
#0 0x38fd659 in poly_int<1u, poly_result<long, long,
poly_coeff_pair_traits<long, long>::result_kind>::type> operator+<1u, long,
long>(poly_int_pod<1u, long> const&, poly_int_pod<1u, long> const&)
../../gcc/poly-int.h:845
#1 0x38fd659 in mem_valid_for_store_merging
../../gcc/gimple-ssa-store-merging.c:3951
#2 0x3908e85 in process_store ../../gcc/gimple-ssa-store-merging.c:4043
#3 0x3908e85 in execute ../../gcc/gimple-ssa-store-merging.c:4279
#4 0x18f5250 in execute_one_pass(opt_pass*) ../../gcc/passes.c:2497
#5 0x18f85bb in execute_pass_list_1 ../../gcc/passes.c:2586
#6 0x18f85e4 in execute_pass_list_1 ../../gcc/passes.c:2587
#7 0x18f8674 in execute_pass_list(function*, opt_pass*)
../../gcc/passes.c:2597
#8 0xbe01ae in cgraph_node::expand() ../../gcc/cgraphunit.c:2139
#9 0xbe4f7d in expand_all_functions ../../gcc/cgraphunit.c:2275
#10 0xbe4f7d in symbol_table::compile() ../../gcc/cgraphunit.c:2624
#11 0xbeee87 in symbol_table::compile() ../../gcc/cgraphunit.c:2720
#12 0xbeee87 in symbol_table::finalize_compilation_unit()
../../gcc/cgraphunit.c:2717
#13 0x1d100a8 in compile_file ../../gcc/toplev.c:480
#14 0x639d9c in do_compile ../../gcc/toplev.c:2132
#15 0x639d9c in toplev::main(int, char**) ../../gcc/toplev.c:2267
#16 0x63c7fa in main ../../gcc/main.c:39
#17 0x7ffff5cafa86 in __libc_start_main (/lib64/libc.so.6+0x21a86)
#18 0x63c929 in _start
(/home/marxin/Programming/gcc/objdir2/gcc/cc1+0x63c929)
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Subject: [Bug tree-optimization/84946] UBSAN: in mem_valid_for_store_merging ../../gcc/gimple-ssa-store-merging.c:3951
Date: Mon, 19 Mar 2018 08:09:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-3-19
Blocks| |63426
Target Milestone|--- |8.0
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
>From gcc-bugs-return-598097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:16:00 2018
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Subject: [Bug tree-optimization/84811] [8 Regression] ICE on valid code at -O3 in 64-bit mode on x86_64-linux-gnu: in smallest_mode_for_size, at stor-layout.c:355
Date: Mon, 19 Mar 2018 08:15:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |rsandifo at gcc dot gnu.org
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--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is UB in the compiler, sure.
And I believe the bug is in known_subrange_p and similar patterns,
template<typename T1, typename T2, typename T3, typename T4>
inline bool
known_subrange_p (const T1 &pos1, const T2 &size1,
const T3 &pos2, const T4 &size2)
{
typedef typename poly_int_traits<T2>::coeff_type C2;
typedef POLY_BINARY_COEFF (T2, T4) size_diff_type;
typedef poly_span_traits<T1, T3, size_diff_type> span;
return (known_gt (size1, POLY_INT_TYPE (T2) (0))
&& (poly_coeff_traits<C2>::signedness > 0
|| known_size_p (size1))
&& known_size_p (size2)
&& known_ge (pos1, pos2)
&& known_le (size1, size2)
&& known_le (span::cast (pos1 - pos2), size2 - size1));
}
isn't enough if pos2 is negative (i.e. poly_coeff_traits<C3>::signedness > 0),
we can run into overflow that way.
The standard way to handle this pos1 - pos2 <= size2 - size1 is perform the
computation in unsigned type, but poly-int.h probably doesn't have so far an
easy way to cast to corresponding unsigned poly_int if signedness > 0.
What complicates it even more is that pos1 and pos2 can have different types.
size2 - size1 could in theory overflow too, even assuming that sizeN can be
only positive or -1, if size1 is -1 and size2 maximum signed size, but perhaps
we can't run into that.
I think other poly-int.h templates suffer from similar issues.
Richard, can you please handle this?
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Subject: [Bug c++/84937] [7/8 Regression] ICE with class template argument deduction and auto
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Subject: [Bug c++/84937] [7/8 Regression] ICE with class template argument deduction and auto
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
r240756
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/84947] New: UBSAN: ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >, generic_wide_int<fixed_wide_int_storage<192> >, unsigned int) ../../gcc/ipa-cp.c:1058
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84947
Bug ID: 84947
Summary: UBSAN:
ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wi
de_int_storage<192> >,
generic_wide_int<fixed_wide_int_storage<192> >,
unsigned int) ../../gcc/ipa-cp.c:1058
Product: gcc
Version: unknown
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: jamborm at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Following causes UBSAN:
$ cat a.c
int main() { foo(0); }
$ cat b.c
struct a {
} foo(struct a b) {
}
$ gcc -flto -O2 [ab].c
a.c: In function ‘main’:
a.c:1:14: warning: implicit declaration of function ‘foo’
[-Wimplicit-function-declaration]
int main() { foo(0); }
^~~
a.c:1:14: warning: type of ‘foo’ does not match original declaration
[-Wlto-type-mismatch]
int main() { foo(0); }
^
b.c:2:3: note: return value type mismatch
} foo(struct a b) {
^
b.c:2:3: note: type ‘struct a’ should match type ‘int’
b.c:2:3: note: ‘foo’ was previously declared here
../../gcc/hwint.h:293:61: runtime error: shift exponent 64 is too large for
64-bit type 'long unsigned int'
#0 0x37bd3d1 in sext_hwi ../../gcc/hwint.h:293
#1 0x37bd3d1 in
wi::binary_traits<generic_wide_int<fixed_wide_int_storage<192> >,
generic_wide_int<fixed_wide_int_storage<192> >,
wi::int_traits<generic_wide_int<fixed_wide_int_storage<192> >
>::precision_type, wi::int_traits<generic_wide_int<fixed_wide_int_storage<192>
> >::precision_type>::result_type
wi::sext<generic_wide_int<fixed_wide_int_storage<192> >
>(generic_wide_int<fixed_wide_int_storage<192> > const&, unsigned int)
../../gcc/wide-int.h:2133
#2 0x37bd3d1 in
ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >,
generic_wide_int<fixed_wide_int_storage<192> >, unsigned int)
../../gcc/ipa-cp.c:1058
#3 0x37c3d07 in propagate_bits_across_jump_function(cgraph_edge*, int,
ipa_jump_func*, ipcp_bits_lattice*) ../../gcc/ipa-cp.c:1878
#4 0x37c5892 in propagate_constants_across_call ../../gcc/ipa-cp.c:2317
#5 0x37d8ca2 in propagate_constants_topo ../../gcc/ipa-cp.c:3224
#6 0x37d8ca2 in ipcp_propagate_stage ../../gcc/ipa-cp.c:3318
#7 0x37e28ee in ipcp_driver ../../gcc/ipa-cp.c:5044
#8 0x37e28ee in execute ../../gcc/ipa-cp.c:5138
#9 0x16690a0 in execute_one_pass(opt_pass*) ../../gcc/passes.c:2497
#10 0x166e35a in execute_ipa_pass_list(opt_pass*) ../../gcc/passes.c:2932
#11 0x6a22f8 in do_whole_program_analysis ../../gcc/lto/lto.c:3147
#12 0x6a22f8 in lto_main() ../../gcc/lto/lto.c:3368
#13 0x1a607ca in compile_file ../../gcc/toplev.c:455
#14 0x628cdc in do_compile ../../gcc/toplev.c:2132
#15 0x628cdc in toplev::main(int, char**) ../../gcc/toplev.c:2267
#16 0x62b76a in main ../../gcc/main.c:39
#17 0x7ffff5cafa86 in __libc_start_main (/lib64/libc.so.6+0x21a86)
#18 0x62b899 in _start
(/home/marxin/bin/gcc/lib/gcc/x86_64-pc-linux-gnu/8.0.1/lto1+0x62b899)
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Subject: [Bug tree-optimization/84946] UBSAN: in mem_valid_for_store_merging ../../gcc/gimple-ssa-store-merging.c:3951
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is another thing that I could easily fix for UHWI computations, but not
really sure how to do it with the poly-int.h stuff in the way. Richard, please
have a look.
>From gcc-bugs-return-598102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:28:36 2018
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Subject: [Bug c++/84936] [8 Regression] ICE with unexpanded parameter pack
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-19
CC| |mpolacek at gcc dot gnu.org
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
r247842
>From gcc-bugs-return-598103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:29:52 2018
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Subject: [Bug lto/84901] --dynamic-list=export is ignored in presence of -flto
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this is a BFD linker bug, with --dynamic-list the linker resolution
with
GNU ld 2.30 is the following
2
func.o 4
190 37612a23f90e023e PREVAILING_DEF_IRONLY func_attr_used_disabled
194 37612a23f90e023e PREVAILING_DEF_IRONLY func_attr_used_enabled
199 37612a23f90e023e PREVAILING_DEF_IRONLY var_attr_used_disabled
202 37612a23f90e023e PREVAILING_DEF_IRONLY var_attr_used_enabled
main.o 5
201 7ea6415e61742ba7 PREVAILING_DEF main
224 7ea6415e61742ba7 RESOLVED_IR var_attr_used_disabled
226 7ea6415e61742ba7 RESOLVED_IR var_attr_used_enabled
218 7ea6415e61742ba7 RESOLVED_IR func_attr_used_enabled
220 7ea6415e61742ba7 RESOLVED_IR func_attr_used_disabled
while when using gold it is
2
func.o 4
190 1ff7d470667c7203 PREVAILING_DEF_IRONLY_EXP func_attr_used_disabled
194 1ff7d470667c7203 PREVAILING_DEF_IRONLY_EXP func_attr_used_enabled
199 1ff7d470667c7203 PREVAILING_DEF_IRONLY_EXP var_attr_used_disabled
202 1ff7d470667c7203 PREVAILING_DEF_IRONLY_EXP var_attr_used_enabled
main.o 5
201 64462b5d6de9d7fa PREVAILING_DEF main
224 64462b5d6de9d7fa RESOLVED_IR var_attr_used_disabled
226 64462b5d6de9d7fa RESOLVED_IR var_attr_used_enabled
218 64462b5d6de9d7fa RESOLVED_IR func_attr_used_enabled
220 64462b5d6de9d7fa RESOLVED_IR func_attr_used_disabled
which looks correct to me and results in properly exported symbols. So it
should work correctly when using gold (from recent enough binutils version,
didn't try to bisect).
HJ, can you look to fix GNU ld?
>From gcc-bugs-return-598104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:30:41 2018
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Subject: [Bug target/84899] [6/7 Regression] ICE: in final_scan_insn_1, at final.c:3139 (error: could not split insn)
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>From gcc-bugs-return-598106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:32:47 2018
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Subject: [Bug c++/84936] [8 Regression] ICE with unexpanded parameter pack
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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>From gcc-bugs-return-598105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:32:03 2018
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Subject: [Bug c/84900] Compiler report a error unexpectedly.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I belive the code is invalid and using literal 0 instead of test = 0 shouldn't
make it accepted either. clang rejects both variants.
>From gcc-bugs-return-598107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:34:42 2018
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Subject: [Bug c++/84906] [8 Regression] Ambiguous conversion not diagnosed, causes entire selection-statement to be omitted
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/84908] retpoline weirdness: 7.3.0-1 and 4.8.5-16: with -fPIC: R_X86_64_PC32 against undefined symbol `__x86_indirect_thunk_rax'
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*, i?86-*-*
Status|WAITING |RESOLVED
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So not a gcc bug?.
>From gcc-bugs-return-598109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:40:09 2018
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From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/84711] AArch32 big-endian fails when taking subreg of a vector mode to a scalar mode.
Date: Mon, 19 Mar 2018 08:40:00 -0000
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--- Comment #9 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Hi Christophhe,
This seems to be a combine issue.
It thinks that
(set (reg/i:SF 16 s0)
(vec_select:SF (reg:V4SF 16 s0 [ xD.6085 ])
(parallel [
(const_int 0 [0])
])))
is a no-op while it doesn't think that
(set (reg/i:SF 16 s0)
(vec_select:SF (reg:V4SF 16 s0 [ xD.6082 ])
(parallel [
(const_int 3 [0x3])
])))
is. It's removing the instruction and there doesn't seem to be anyway for the
backend to tell it not to.
The reason it worked before seem to be that we were telling it any subreg under
big-endian is invalid, so the big-endian code would skip this no-op check.
Marking the destination register as a use
(use (match_dup 0))
seems to make it skip the first no-op check but later deletes it anyway. So I
see no way around this without a mid-end change. As such I will revert the
commit for GCC 8.
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Subject: [Bug ipa/84947] UBSAN: ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >, generic_wide_int<fixed_wide_int_storage<192> >, unsigned int) ../../gcc/ipa-cp.c:1058
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Martin Liška <marxin at gcc dot gnu.org> changed:
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Subject: [Bug c/84919] [8 Regression] error: passing argument 1 to restrict-qualified parameter aliases with argument 5 [-Werror=restrict]
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug c++/84927] [7/8 Regressiion] ICE with NSDMI and reference
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
r238559
>From gcc-bugs-return-598113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:43:07 2018
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Subject: [Bug c++/84925] [8 Regression] ICE with segfault in __PRETTY_FUNCTION__
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-598114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:43:34 2018
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Subject: [Bug target/84945] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
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Martin Liška <marxin at gcc dot gnu.org> changed:
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>From gcc-bugs-return-598116-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:44:40 2018
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Subject: [Bug tree-optimization/84929] [8 Regression] ICE at -O3 on valid code on x86_64-linux-gnu: tree check: expected polynomial_chrec, have nop_expr in analyze_siv_subscript_cst_affine, at tree-data-ref.c:3018
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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-598115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:44:18 2018
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Subject: [Bug c++/84927] [7/8 Regressiion] ICE with NSDMI and reference
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-598117-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:46:02 2018
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Subject: [Bug c/84900] Compiler report a error unexpectedly.
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--- Comment #2 from wierton <141242068 at smail dot nju.edu.cn> ---
(In reply to Richard Biener from comment #1)
> I belive the code is invalid and using literal 0 instead of test = 0
> shouldn't make it accepted either. clang rejects both variants.
I think so too, the gcc should accept the both two forms or reject them
together, but as I tested above, the gcc accept the first and reject the
second.
>From gcc-bugs-return-598118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 08:47:48 2018
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Subject: [Bug tree-optimization/84935] FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
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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> ---
Please provide the .optimized dump. Note the testcase is expected to fully
unroll on the GIMPLE level with both loops vectorized or both loops not
vectorized.
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
Date: Mon, 19 Mar 2018 08:47:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Last reconfirmed|2018-03-19 00:00:00 |
CC| |hjl.tools at gmail dot com,
| |jakub at gcc dot gnu.org,
| |kyukhin at gcc dot gnu.org,
| |uros at gcc dot gnu.org
Version|unknown |8.0
Summary|UBSAN: |[8 Regression] UBSAN:
|gcc/config/i386/i386.c:3331 |gcc/config/i386/i386.c:3331
|2:22: runtime error: shift |2:22: runtime error: shift
|exponent 32 is too large |exponent 32 is too large
|for 32-bit type 'int' |for 32-bit type 'int'
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ugh, this is an important issue.
In GCC 7 we had F_MAX 31, so all of the runtime feature tests are fine.
We have:
struct __processor_model
{
unsigned int __cpu_vendor;
unsigned int __cpu_type;
unsigned int __cpu_subtype;
unsigned int __cpu_features[1];
} __cpu_model;
and that is an exported variable from libgcc, thankfully only as @GCC_4.8
symbol and thus new programs shouldn't link against that.
No matter what, at least for targets that don't use symbol versioning and
prevent using that symbol, I think we need to rename __cpu_model to something
else (__cpu_model2), add at least one another 32-bit __cpu_features bitfield
and for features >= 32 use the second field instead of the first one.
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
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Subject: [Bug c++/84936] [8 Regression] ICE with unexpanded parameter pack
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Subject: [Bug tree-optimization/84946] [8 Regression] UBSAN: in mem_valid_for_store_merging ../../gcc/gimple-ssa-store-merging.c:3951
Date: Mon, 19 Mar 2018 08:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Version|unknown |8.0.1
Summary|UBSAN: in |[8 Regression] UBSAN: in
|mem_valid_for_store_merging |mem_valid_for_store_merging
|../../gcc/gimple-ssa-store- |../../gcc/gimple-ssa-store-
|merging.c:3951 |merging.c:3951
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Subject: [Bug fortran/84615] [8 Regression] Executable Segfault for some tests compiled with -m32 after r256284
Date: Mon, 19 Mar 2018 09:01:00 -0000
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--- Comment #11 from Janne Blomqvist <jb at gcc dot gnu.org> ---
Yes, makes sense. And the same happens if one uses an external function with a
hand-rolled interface declaration:
function chararray2string(chararray) result(text)
character(len=1), dimension(:) :: chararray ! input
character(len=int(size(chararray, 1), kind=8)) :: text ! output
print *, ">", chararray, "<"
do i = 1,size(chararray,1)
text(i:i) = chararray (i)
end do
print *, ">", text, "<"
end function chararray2string
program TestStringTools
interface
function chararray2string(chararray) result(text)
character(len=1), dimension(:) :: chararray ! input
character(len=int(size(chararray, 1), kind=8)) :: text ! output
end function chararray2string
end interface
character(len=52) :: txt
character(len=1), dimension(52) :: chararr = &
(/(char(i+64),char(i+96), i = 1,26)/)
print *, ">", chararr, "<"
txt = chararray2string(chararr)
if (txt .ne. "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz") &
STOP 1
end program TestStringTools
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Subject: [Bug target/84711] AArch32 big-endian fails when taking subreg of a vector mode to a scalar mode.
Date: Mon, 19 Mar 2018 09:15:00 -0000
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--- Comment #10 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Author: tnfchris
Date: Mon Mar 19 09:14:25 2018
New Revision: 258642
URL: https://gcc.gnu.org/viewcvs?rev=258642&root=gcc&view=rev
Log:
gcc/
2018-03-19 Tamar Christina <tamar.christina@arm.com>
PR target/84711
* config/arm/arm.c (arm_can_change_mode_class): revert r258554.
gcc/testsuite/
2018-03-19 Tamar Christina <tamar.christina@arm.com>
PR target/84711
* gcc.target/arm/big-endian-subreg.c: Delete.
Removed:
trunk/gcc/testsuite/gcc.target/arm/big-endian-subreg.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/84615] [8 Regression] Executable Segfault for some tests compiled with -m32 after r256284
Date: Mon, 19 Mar 2018 09:15:00 -0000
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--- Comment #12 from Janne Blomqvist <jb at gcc dot gnu.org> ---
So to be clear, the problem seems to be that while the code generation for the
function itself appears Ok, it generates the interface wrong (i.e. uses the
declared charlen kind instead of C_SIZE_T), and thus calling it doesn't work
properly.
I still have no idea where in the frontend code the error is.
>From gcc-bugs-return-598132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 09:24:41 2018
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
Date: Mon, 19 Mar 2018 09:24:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43696
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43696&action=edit
gcc8-pr84945.patch
Untested fix.
I think this ought to work well on x86_64/i?86-linux, but I'm afraid is going
to be an ABI change otherwise, because __cpu_model exported out of libgcc will
change in that case size and objects referencing it might have copy relocations
against it.
Another possibility is not to add the extra features into
__cpu_model.__cpu_features, but add a new variable (say __cpu_features2), and
make sure to not add this variable at all into libgcc_s.so.1 (i.e. force it to
be libgcc.a only), then __builtin_cpu_supports for these new features would
always link in the libgcc.a(cpuinfo.o).
>From gcc-bugs-return-598133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 09:36:55 2018
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Subject: [Bug rtl-optimization/84643] gcc/optabs.c:6549:26: runtime error: load of value 131075, which is not a valid value for type 'memmodel'
Date: Mon, 19 Mar 2018 09:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-03-19
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43697
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43697&action=edit
gcc8-pr84643.patch
Untested fix.
>From gcc-bugs-return-598134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:01:03 2018
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/84948] New: [8 regression] ICE in set_from, at go/gofrontend/types.cc:2660
Date: Mon, 19 Mar 2018 10:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84948
Bug ID: 84948
Summary: [8 regression] ICE in set_from, at
go/gofrontend/types.cc:2660
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: go
Assignee: ian at airs dot com
Reporter: schwab@linux-m68k.org
CC: cmang at google dot com
Target Milestone: ---
Target: m68k-*-*
It looks like set_from makes some invalid alignment assumptions.
libtool: compile:
/home/abuild/rpmbuild/BUILD/gcc-8.0.1+r258445/obj-m68k-suse-linux/./gcc/gccgo
-B/home/abuild/rpmbuild/BUILD/gcc-8.0.1+r258445/obj-m68k-suse-linux/./gcc/
-B/usr/m68k-suse-linux/bin/ -B/usr/m68k-suse-linux/lib/ -isystem
/usr/m68k-suse-linux/include -isystem /usr/m68k-suse-linux/sys-include -O2 -g
-I . -c -fgo-pkgpath=runtime -fgo-c-header=runtime.inc.tmp
-fgo-compiling-runtime ../../../libgo/go/runtime/alg.go
../../../libgo/go/runtime/atomic_pointer.go
../../../libgo/go/runtime/cgo_gccgo.go ../../../libgo/go/runtime/cgocall.go
../../../libgo/go/runtime/cgocheck.go ../../../libgo/go/runtime/chan.go
../../../libgo/go/runtime/compiler.go ../../../libgo/go/runtime/cpuprof.go
../../../libgo/go/runtime/cputicks.go ../../../libgo/go/runtime/debug.go
../../../libgo/go/runtime/env_posix.go ../../../libgo/go/runtime/error.go
../../../libgo/go/runtime/extern.go ../../../libgo/go/runtime/fastlog2.go
../../../libgo/go/runtime/fastlog2table.go ../../../libgo/go/runtime/ffi.go
../../../libgo/go/runtime/float.go ../../../libgo/go/runtime/hash32.go
../../../libgo/go/runtime/hashmap.go ../../../libgo/go/runtime/hashmap_fast.go
../../../libgo/go/runtime/heapdump.go ../../../libgo/go/runtime/iface.go
../../../libgo/go/runtime/lfstack.go ../../../libgo/go/runtime/lfstack_32bit.go
../../../libgo/go/runtime/lock_futex.go ../../../libgo/go/runtime/malloc.go
../../../libgo/go/runtime/mbarrier.go ../../../libgo/go/runtime/mbitmap.go
../../../libgo/go/runtime/mcache.go ../../../libgo/go/runtime/mcentral.go
../../../libgo/go/runtime/mem_gccgo.go ../../../libgo/go/runtime/mfinal.go
../../../libgo/go/runtime/mfixalloc.go ../../../libgo/go/runtime/mgc.go
../../../libgo/go/runtime/mgc_gccgo.go ../../../libgo/go/runtime/mgclarge.go
../../../libgo/go/runtime/mgcmark.go ../../../libgo/go/runtime/mgcsweep.go
../../../libgo/go/runtime/mgcsweepbuf.go ../../../libgo/go/runtime/mgcwork.go
../../../libgo/go/runtime/mheap.go ../../../libgo/go/runtime/mprof.go
../../../libgo/go/runtime/msan0.go ../../../libgo/go/runtime/msize.go
../../../libgo/go/runtime/mstats.go ../../../libgo/go/runtime/mwbbuf.go
../../../libgo/go/runtime/netpoll.go ../../../libgo/go/runtime/netpoll_epoll.go
../../../libgo/go/runtime/os_gccgo.go ../../../libgo/go/runtime/os_linux.go
../../../libgo/go/runtime/panic.go ../../../libgo/go/runtime/print.go
../../../libgo/go/runtime/proc.go ../../../libgo/go/runtime/profbuf.go
../../../libgo/go/runtime/proflabel.go ../../../libgo/go/runtime/race0.go
../../../libgo/go/runtime/rdebug.go ../../../libgo/go/runtime/relax_stub.go
../../../libgo/go/runtime/runtime.go ../../../libgo/go/runtime/runtime1.go
../../../libgo/go/runtime/runtime2.go ../../../libgo/go/runtime/rwmutex.go
../../../libgo/go/runtime/select.go ../../../libgo/go/runtime/sema.go
../../../libgo/go/runtime/signal_gccgo.go
../../../libgo/go/runtime/signal_sighandler.go
../../../libgo/go/runtime/signal_unix.go ../../../libgo/go/runtime/sigqueue.go
../../../libgo/go/runtime/sizeclasses.go ../../../libgo/go/runtime/slice.go
../../../libgo/go/runtime/string.go ../../../libgo/go/runtime/stubs.go
../../../libgo/go/runtime/stubs2.go ../../../libgo/go/runtime/stubs_linux.go
../../../libgo/go/runtime/symtab.go ../../../libgo/go/runtime/time.go
../../../libgo/go/runtime/timestub.go ../../../libgo/go/runtime/trace.go
../../../libgo/go/runtime/traceback_gccgo.go ../../../libgo/go/runtime/type.go
../../../libgo/go/runtime/typekind.go ../../../libgo/go/runtime/unaligned2.go
../../../libgo/go/runtime/utf8.go ../../../libgo/go/runtime/write_err.go
runtime_sysinfo.go sigtab.go -fPIC -o .libs/runtime.o
go1: internal compiler error: in set_from, at go/gofrontend/types.cc:2660
0x80241bd9 Ptrmask::set_from(Gogo*, Type*, long long, long long)
../../gcc/go/gofrontend/types.cc:2660
0x80241959 Ptrmask::set_from(Gogo*, Type*, long long, long long)
../../gcc/go/gofrontend/types.cc:2696
0x80241cb1 Type::gc_ptrmask_var(Gogo*, long long, long long)
../../gcc/go/gofrontend/types.cc:2816
0x80243409 Type::make_gc_symbol_var(Gogo*)
../../gcc/go/gofrontend/types.cc:2523
0x802437ab Type::gc_symbol_pointer(Gogo*)
../../gcc/go/gofrontend/types.cc:2473
0x801ad2ad Expression::get_backend(Translate_context*)
../../gcc/go/gofrontend/expressions.cc:413
0x801c2ee9 Struct_construction_expression::do_get_backend(Translate_context*)
../../gcc/go/gofrontend/expressions.cc:12782
0x801ad2ad Expression::get_backend(Translate_context*)
../../gcc/go/gofrontend/expressions.cc:413
0x801c2ee9 Struct_construction_expression::do_get_backend(Translate_context*)
../../gcc/go/gofrontend/expressions.cc:12782
0x801ad2ad Expression::get_backend(Translate_context*)
../../gcc/go/gofrontend/expressions.cc:413
0x8023c0d7 Type::make_type_descriptor_var(Gogo*)
../../gcc/go/gofrontend/types.cc:1418
0x8023c377 Type::type_descriptor_pointer(Gogo*, Location)
../../gcc/go/gofrontend/types.cc:1298
0x801e9107 Named_object::get_backend(Gogo*, std::vector<Bexpression*,
std::allocator<Bexpression*> >&, std::vector<Btype*, std::allocator<Btype*> >&,
std::vector<Bfunction*, std::allocator<Bfunction*> >&)
../../gcc/go/gofrontend/gogo.cc:7524
0x801f0d8d Gogo::write_globals()
../../gcc/go/gofrontend/gogo.cc:1329
0x801db3b5 go_write_globals()
../../gcc/go/gofrontend/go.cc:183
>From gcc-bugs-return-598135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:03:40 2018
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Subject: [Bug go/84948] [8 regression] ICE in set_from, at go/gofrontend/types.cc:2660
Date: Mon, 19 Mar 2018 10:03:00 -0000
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Andreas Schwab <schwab@linux-m68k.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-598136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:06:00 2018
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Subject: [Bug c++/84942] [6/7/8 Regression] internal compiler error: in fold_convert_const_int_from_real, at fold-const.c:2011
Date: Mon, 19 Mar 2018 10:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Using cp_build_unary_op for FIX_TRUNC_EXPR looks wrong to me, that function
uses the type of the operand as the type of the unary expression.
Perhaps:
--- gcc/cp/pt.c.jj 2018-03-16 21:11:04.440773108 +0100
+++ gcc/cp/pt.c 2018-03-19 10:58:39.803657613 +0100
@@ -17495,8 +17495,10 @@ tsubst_copy_and_build (tree t,
complain|decltype_flag));
case FIX_TRUNC_EXPR:
- RETURN (cp_build_unary_op (FIX_TRUNC_EXPR, RECUR (TREE_OPERAND (t, 0)),
- false, complain));
+ op1 = RECUR (TREE_OPERAND (t, 0));
+ if (error_operand_p (op1))
+ RETURN (error_mark_node);
+ RETURN (build1 (FIX_TRUNC_EXPR, TREE_TYPE (t), op1));
case ADDR_EXPR:
op1 = TREE_OPERAND (t, 0);
>From gcc-bugs-return-598137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:16:38 2018
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Subject: [Bug fortran/84615] [8 Regression] Executable Segfault for some tests compiled with -m32 after r256284
Date: Mon, 19 Mar 2018 10:16:00 -0000
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--- Comment #13 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(In reply to Janne Blomqvist from comment #12)
> So to be clear, the problem seems to be that while the code generation for
> the function itself appears Ok, it generates the interface wrong (i.e. uses
> the declared charlen kind instead of C_SIZE_T), and thus calling it doesn't
> work properly.
I'm confused. Should not the charlen kind be identical to C_SIZE_T, also
for -m32?
>From gcc-bugs-return-598138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:24:45 2018
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Subject: [Bug fortran/84615] [8 Regression] Executable Segfault for some tests compiled with -m32 after r256284
Date: Mon, 19 Mar 2018 10:24:00 -0000
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--- Comment #14 from Janne Blomqvist <jb at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #13)
> (In reply to Janne Blomqvist from comment #12)
> > So to be clear, the problem seems to be that while the code generation for
> > the function itself appears Ok, it generates the interface wrong (i.e. uses
> > the declared charlen kind instead of C_SIZE_T), and thus calling it doesn't
> > work properly.
>
> I'm confused. Should not the charlen kind be identical to C_SIZE_T, also
> for -m32?
Yes, it should. But if you look e.g. at #c8 and #c9 you'll see that in the
interface the compiler thinks it should be kind=8 (on 32-bit i686), most likely
because the charlen is declared as kind=8. Which isn't C_SIZE_T which is 4 on
32-bit targets.
So what I'm trying to say is that we should always treat charlens as
kind=C_SIZE_T (gfc_charlen_type_node) in interfaces regardless of how they are
actually declared in the Fortran source code.
>From gcc-bugs-return-598139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:25:01 2018
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Subject: [Bug inline-asm/84941] [6/7/8 Regression] internal compiler error: in reg_overlap_mentioned_p, at rtlanal.c:1870 (reg_overlap_mentioned_p()/match_asm_constraints_1())
Date: Mon, 19 Mar 2018 10:25:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Component|c++ |inline-asm
Version|8.0.1 |8.0
Target Milestone|--- |8.0
Summary|internal compiler error: in |[6/7/8 Regression] internal
|reg_overlap_mentioned_p, at |compiler error: in
|rtlanal.c:1870 |reg_overlap_mentioned_p, at
|(reg_overlap_mentioned_p()/ |rtlanal.c:1870
|match_asm_constraints_1()) |(reg_overlap_mentioned_p()/
| |match_asm_constraints_1())
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Doesn't need the destructor, not C++
void
foo (void)
{
short *b[1] = { 0 };
asm ("" : "=m" (b), "=d" (b) : "1p" (b));
}
ICEs at -O1+ as well.
Started with r128864.
>From gcc-bugs-return-598140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:28:37 2018
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
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Julia Koval <julia.koval at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |julia.koval at intel dot com
--- Comment #3 from Julia Koval <julia.koval at intel dot com> ---
Created attachment 43698
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43698&action=edit
64bit const patch
As an idea, can we use 64bit int instead of second array element(was proposed
in PR84932)?
>From gcc-bugs-return-598141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:39:33 2018
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
See above, that is an ABI change on all of x86.
>From gcc-bugs-return-598143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:40:54 2018
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |dcb314 at hotmail dot com
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
*** Bug 84932 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-598144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:40:56 2018
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
Date: Mon, 19 Mar 2018 10:40:00 -0000
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Bug 63426 depends on bug 84932, which changed state.
Bug 84932 Summary: [8 Regression] i386/cpuinfo.h:293: 4 * bad bitshifts ?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84932
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----------------------------------------------------------------------------
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>From gcc-bugs-return-598142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:40:52 2018
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Subject: [Bug target/84932] [8 Regression] i386/cpuinfo.h:293: 4 * bad bitshifts ?
Date: Mon, 19 Mar 2018 10:40:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 84945 ***
>From gcc-bugs-return-598145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:59:06 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/84941] [6/7/8 Regression] internal compiler error: in reg_overlap_mentioned_p, at rtlanal.c:1870 (reg_overlap_mentioned_p()/match_asm_constraints_1())
Date: Mon, 19 Mar 2018 10:59:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43699
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43699&action=edit
gcc8-pr84941.patch
Untested fix.
>From gcc-bugs-return-598146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 10:59:06 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/84933] [8 Regression] ICE in set_value_range, at tree-vrp.c:288 since r257852
Date: Mon, 19 Mar 2018 10:59:00 -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> ---
else if (is_min
/* As a special exception preserve non-null ranges. */
&& !(TYPE_UNSIGNED (TREE_TYPE (min))
&& integer_zerop (max)))
{
tree one = build_int_cst (TREE_TYPE (max), 1);
min = int_const_binop (PLUS_EXPR, max, one);
max = vrp_val_max (TREE_TYPE (max));
t = VR_RANGE;
}
the issue is we end up with ~[0, 2147483647] which we want to canonicalize
to [2147483647 + 1, type-max]. But with -fstrict-enums TYPE_MAX_VALUE
of the enumeral type is 1.
So we have out-of-bound ranges as input if we look at TYPE_MIN/MAX_VALUE
which leads to GIGO.
Not sure what to do here at this point. I was always uncomfortable with
using TYPE_MIN/MAX_VALUE and given we use wi::min/max_value in a lot of
places already we could do the same in vrp_val_min/max. Another fix
would be to prune those out-of-bound ranges in both
set_and_canonicalize_value_range and set_value_range. Or a more
localized fix in set_and_canonicalize_value_range instead of looking
for an exact match of vrp_val_is_min/max check <=/>= here and thus in
this case drop into
if (is_min && is_max)
{
/* We cannot deal with empty ranges, drop to varying.
??? This could be VR_UNDEFINED instead. */
set_value_range_to_varying (vr);
return;
}
we still have the issue of using TYPE_MIN/MAX_VALUE and allowing
out-of-bound ranges at the same time though.
vrp_val_is_min/max has the issue to only work reliably for integral
types as well. Auditing all users of vrp_val_[is_]{min,max} is
necessary here.
So the simplest fix I can think of is
Index: gcc/tree-vrp.c
===================================================================
--- gcc/tree-vrp.c (revision 258641)
+++ gcc/tree-vrp.c (working copy)
@@ -386,8 +386,13 @@ set_and_canonicalize_value_range (value_
/* Anti-ranges that can be represented as ranges should be so. */
if (t == VR_ANTI_RANGE)
{
- bool is_min = vrp_val_is_min (min);
- bool is_max = vrp_val_is_max (max);
+ /* For -fstrict-enums we may receive out-of-range ranges so consider
+ values < -INF and values > INF as -INF/INF as well. */
+ tree type = TREE_TYPE (min);
+ bool is_min = (INTEGRAL_TYPE_P (type)
+ && tree_int_cst_compare (min, TYPE_MIN_VALUE (type)) <=
0);
+ bool is_max = (INTEGRAL_TYPE_P (type)
+ && tree_int_cst_compare (max, TYPE_MAX_VALUE (type)) >=
0);
if (is_min && is_max)
{
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Subject: [Bug ipa/84947] UBSAN: ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >, generic_wide_int<fixed_wide_int_storage<192> >, unsigned int) ../../gcc/ipa-cp.c:1058
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
#if defined (__GNUC__)
{
/* Take the faster path if the implementation-defined bits it's relying
on are implemented the way we expect them to be. Namely, conversion
from unsigned to signed preserves bit pattern, and right shift of
a signed value propagates the sign bit.
We have to convert from signed to unsigned and back, because when left
shifting signed values, any overflow is undefined behavior. */
gcc_checking_assert (prec < HOST_BITS_PER_WIDE_INT);
int shift = HOST_BITS_PER_WIDE_INT - prec;
return ((HOST_WIDE_INT) ((unsigned HOST_WIDE_INT) src << shift)) >>
shift;
}
#else
so prec is zero for some reason?
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From: "christoph@lipka-koeln.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84949] New: -ffast-math bugged with respect to NaNs
Date: Mon, 19 Mar 2018 11:26:00 -0000
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Bug ID: 84949
Summary: -ffast-math bugged with respect to NaNs
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
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Priority: P3
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Target Milestone: ---
When -ffast-math is specified, NaNs are broken in _one_ of the following ways:
(A)
std::isnan() and std::fpclassify() are broken in that they fail to identify
NaNs.
-OR-
(B)
std::numeric_limits<T>::has_quiet_NaN() is broken in that it claims that NaNs
are supported.
Seen with both g++ 4.8.4 on Ubuntu 14.04, as well as g++ 5.4.0 on MS Windows
Subsystem for Linux, using the following set of compiler flags in both cases:
-pipe -Wno-multichar -Wno-write-strings -fno-enforce-eh-specs
-Wno-non-template-friend -s -O3 -ffast-math -march=native -pthread
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/84949] -ffast-math bugged with respect to NaNs
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Component|c++ |libstdc++
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
-ffast-math implies -ffinite-math-only which causes GCC to assume no inputs to
isnan/fpclassify are NaN. As a programmer using -ffast-math you give this
guarantee to the compiler, so what you report is a pilot error?
I'm not sure if std::numeric_limits is wrong with -ffinite-math-only given
NaNs are still "supported" as in
double nan = __builtin_nan("");
int main()
{
__builtin_printf ("%f\n", nan);
return __builtin_isnan (nan);
}
> g++-7 t.C -ffast-math -O2
> ./a.out
nan
> echo $?
0
so NaNs are there. But in the testcase I broke the contract with the compiler
with feeding a NaN into isnan().
I guess the compiler could have as well replaced the NaN generated by
__builtin_nan("") with zero.
>From gcc-bugs-return-598150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 11:36:32 2018
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Subject: [Bug c++/84942] [6/7/8 Regression] internal compiler error: in fold_convert_const_int_from_real, at fold-const.c:2011
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43700
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43700&action=edit
gcc8-pr84942.patch
Full untested patch.
>From gcc-bugs-return-598151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 11:46:17 2018
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Subject: [Bug middle-end/84891] -fno-signed-zeros leads to optimization which should be possible only if also -ffinite-math-only is on
Date: Mon, 19 Mar 2018 11:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org,
| |pault at gcc dot gnu.org
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to joseph@codesourcery.com from comment #2)
> I'm not sure what the C++ complex multiplication / division requirements
> are here (for that matter, C doesn't seem to precisely define which NaN -
> which value with at least one NaN part and the other part not infinite -
> is produced from complex multiplication / division in this case, though
> NaN + iNaN probably makes more sense).
I don't see anything in the C++ standard going into detail here either.
It simply says (from C++14 26.4/3):
"If the result of a function is not mathematically defined or not in the
range of representable vaslues for its type, the behavior is undefined."
which to my reading makes any operation with NaN/Inf undefined given
"mathematically" a NaN or Inf does not exist.
I can't find anything in the Fortran2008 standard specifying how
arithmetic on intrinsic complex types work. CCing two Fortran maintainers
to see whether Fortran requires us to do any changes here.
So we conclude this bug isn't a bug after all just there's implementation
defined behavior that would make more sense?
>From gcc-bugs-return-598152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 11:48:29 2018
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Subject: [Bug c++/84940] [7/8 Regression] internal compiler error: in build_value_init_noctor, at cp/init.c:465
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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| |jason at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Similar to PR84665. Also needs an empty class to invoke constexpr evaluation.
>From gcc-bugs-return-598153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 11:52:07 2018
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Subject: [Bug c++/84940] [7/8 Regression] internal compiler error: in build_value_init_noctor, at cp/init.c:465
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Slightly adjusted testcase:
void
foo (int x)
{
struct {} a[1][x](-a[0]); // { dg-error "wrong type argument to unary minus"
}
}
>From gcc-bugs-return-598154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 11:52:31 2018
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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>From gcc-bugs-return-598155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 11:53:03 2018
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Subject: [Bug c++/84665] [7/8 Regression] internal compiler error: in build_value_init, at cp/init.c:343
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Related to PR84940.
>From gcc-bugs-return-598156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 11:58:07 2018
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Subject: [Bug target/84908] retpoline weirdness: 7.3.0-1 and 4.8.5-16: with -fPIC: R_X86_64_PC32 against undefined symbol `__x86_indirect_thunk_rax'
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
It is a kernel bug:
https://bugzilla.kernel.org/show_bug.cgi?id=199129
>From gcc-bugs-return-598157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:03:43 2018
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
Date: Mon, 19 Mar 2018 12:03:00 -0000
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #2)
> Created attachment 43696 [details]
> gcc8-pr84945.patch
>
> Untested fix.
> I think this ought to work well on x86_64/i?86-linux, but I'm afraid is
> going to be an ABI change otherwise, because __cpu_model exported out of
> libgcc will change in that case size and objects referencing it might have
> copy relocations against it.
>
> Another possibility is not to add the extra features into
> __cpu_model.__cpu_features, but add a new variable (say __cpu_features2),
> and make sure to not add this variable at all into libgcc_s.so.1 (i.e. force
> it to be libgcc.a only), then __builtin_cpu_supports for these new features
> would always link in the libgcc.a(cpuinfo.o).
I like this approach better.
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
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--- Comment #1 from Florian Weimer <fw at gcc dot gnu.org> ---
This bit needs to change for glibc 2.27 and later:
#ifdef __i386__
# define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
#else
# define DL_INTERNAL_FUNCTION
#endif
We removed the regparm attribute for compatibility with CET. The GCC manual
says that regparm (3) is ABI-compatible on i386, but it really is not.
We could perhaps add an alias to newer glibcs (including 2.27), so that libasan
can detect that glibc is more recent and call the function with the right ABI.
Or expose the information via dlinfo (but the interface is problematic because
it assumes that the static TLS size is fixed—we could eventually switch to a
model where we have a larger reserved region for the initial thread).
>From gcc-bugs-return-598159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:18:48 2018
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Subject: [Bug middle-end/84891] -fno-signed-zeros leads to optimization which should be possible only if also -ffinite-math-only is on
Date: Mon, 19 Mar 2018 12:18:00 -0000
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--- Comment #4 from ead <noone@turm-lahnstein.de> ---
From my naive point of view:
- The c++ standard doesn't define how complex-number-multiplication should
work, it is implementation defined/gcc-specific (I'm not a standard-scholar, so
might be very wrong about it).
- One can deduce from the results in the IEEE 754 mode, how this
multiplication (implementation-defined and gcc-specific) is implemented.
- One's expectation with -fno-signed-zeros is that only transformations
which honor infs/nans can be performed by the optimizer. Clearly, we cannot
refer to the standard to see, what the result with -fno-signed-zeros should be,
because -fno-signed-zeros is not covered by standard, but is a gcc-specific
option.
So in this case, the effect of -fno-signed-zeros is not covered by the
description in the man-pages (at least as I understand that):
-fno-signed-zeros
Allow optimizations for floating point arithmetic that ignore the
signedness of zero. IEEE arithmetic specifies the behavior of distinct +0.0 and
-0.0 values, which then prohibits simplification of expressions such as x+0.0
or 0.0*x (even with -ffinite-math-only). This option implies that the sign of a
zero result isn't significant.
The default is -fsigned-zeros.
>From gcc-bugs-return-598160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:23:29 2018
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Subject: [Bug c++/84938] [7/8 Regression] internal compiler error: in gen_reg_rtx, at emit-rtl.c:1187 (gen_reg_rtx()/maybe_legitimize_operand())
Date: Mon, 19 Mar 2018 12:23:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
int &&a = 1 / ~-1;
is enough.
When we have
int &&b = 1 / 0;
this doesn't ICE. When creating TRUNC_DIV_EXPR for the latter, we don't set
the constant bit on it, because the last argument is integer_zerop. That is
not the case with the former testcase, but both arguments are TREE_CONSTANT and
so we set TREE_CONSTANT on the TRUNC_DIV_EXPR as well.
I'm surprised we never cp_fold this initializer.
>From gcc-bugs-return-598162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:27:55 2018
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
Date: Mon, 19 Mar 2018 12:27:00 -0000
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--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 19 Mar 2018, fw at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84761
>
> --- Comment #1 from Florian Weimer <fw at gcc dot gnu.org> ---
> This bit needs to change for glibc 2.27 and later:
>
> #ifdef __i386__
> # define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
> #else
> # define DL_INTERNAL_FUNCTION
> #endif
>
> We removed the regparm attribute for compatibility with CET. The GCC manual
> says that regparm (3) is ABI-compatible on i386, but it really is not.
>
> We could perhaps add an alias to newer glibcs (including 2.27), so that libasan
> can detect that glibc is more recent and call the function with the right ABI.
> Or expose the information via dlinfo (but the interface is problematic because
> it assumes that the static TLS size is fixed—we could eventually switch to a
> model where we have a larger reserved region for the initial thread).
I think as there are already quite some __GLIBC_PREREQ uses in the
sanitizer lib changing the above prototype appropriately would be
good enough.
Of course exposing the desired information without the need to resort
to a private interface would be nice.
So sth like
Index: libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc
===================================================================
--- libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc (revision
258641)
+++ libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc (working
copy)
@@ -152,7 +152,14 @@ bool SanitizerGetThreadName(char *name,
static uptr g_tls_size;
#ifdef __i386__
+#ifndef __GLIBC_PREREQ
+#define __GLIBC_PREREQ(x, y) 0
+#endif
+#ifdef SANITIZER_LINUX && __GLIBC_PREREQ(2, 27)
+# define DL_INTERNAL_FUNCTION
+#else
# define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
+#endif
#else
# define DL_INTERNAL_FUNCTION
#endif
>From gcc-bugs-return-598161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:27:56 2018
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Subject: [Bug c++/84938] [7/8 Regression] internal compiler error: in gen_reg_rtx, at emit-rtl.c:1187 (gen_reg_rtx()/maybe_legitimize_operand())
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps instead of integer_zerop for div_by_zero build2 could use
div_by_zero = TREE_CONSTANT (arg1) && !integer_nonzerop (arg1);
i.e. be conservative rather than optimistic when arg1 is TREE_CONSTANT, but not
INTEGER_CST/COMPLEX_CST. But integer_nonzerop doesn't handle for some reason
VECTOR_CSTs, so we'd either need to change integer_nonzerop or for now build2
to handle VECTOR_CST somehow.
>From gcc-bugs-return-598164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:31:39 2018
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Subject: [Bug middle-end/84891] -fno-signed-zeros leads to optimization which should be possible only if also -ffinite-math-only is on
Date: Mon, 19 Mar 2018 12:31:00 -0000
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 19 Mar 2018, noone@turm-lahnstein.de wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84891
>
> --- Comment #4 from ead <noone@turm-lahnstein.de> ---
> From my naive point of view:
>
> - The c++ standard doesn't define how complex-number-multiplication should
> work, it is implementation defined/gcc-specific (I'm not a standard-scholar, so
> might be very wrong about it).
>
> - One can deduce from the results in the IEEE 754 mode, how this
> multiplication (implementation-defined and gcc-specific) is implemented.
>
> - One's expectation with -fno-signed-zeros is that only transformations
> which honor infs/nans can be performed by the optimizer. Clearly, we cannot
> refer to the standard to see, what the result with -fno-signed-zeros should be,
> because -fno-signed-zeros is not covered by standard, but is a gcc-specific
> option.
>
> So in this case, the effect of -fno-signed-zeros is not covered by the
> description in the man-pages (at least as I understand that):
>
>
>
> -fno-signed-zeros
>
> Allow optimizations for floating point arithmetic that ignore the
> signedness of zero. IEEE arithmetic specifies the behavior of distinct +0.0 and
> -0.0 values, which then prohibits simplification of expressions such as x+0.0
> or 0.0*x (even with -ffinite-math-only). This option implies that the sign of a
> zero result isn't significant.
>
> The default is -fsigned-zeros.
The implementation might choose to make complex multiplication with
NaN have either the real or imag part NaN and not exactly specify
which one.
I previously said in this bug that the way tree-complex.c guards
against signed-zeros is awkward and overly pessimistic.
>From gcc-bugs-return-598163-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:31:39 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 demangler/84950] New: UBSAN: libiberty/cplus-dem.c:4430:3: runtime error: null pointer passed as argument 2, which is declared to never be null
Date: Mon, 19 Mar 2018 12:31:00 -0000
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Bug ID: 84950
Summary: UBSAN: libiberty/cplus-dem.c:4430:3: runtime error:
null pointer passed as argument 2, which is declared
to never be null
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: demangler
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Blocks: 63426
Target Milestone: ---
Following causes the run-time error:
$ cat /tmp/todo
_Q.__0
::Q.(void)
$ ./libiberty/testsuite/test-demangle < /tmp/todo
../../libiberty/cplus-dem.c:4430:3: runtime error: null pointer passed as
argument 2, which is declared to never be null
#0 0x402378 in remember_Ktype ../../libiberty/cplus-dem.c:4430
#1 0x41bd85 in demangle_class ../../libiberty/cplus-dem.c:2688
#2 0x41bd85 in demangle_signature ../../libiberty/cplus-dem.c:1556
#3 0x41f211 in internal_cplus_demangle ../../libiberty/cplus-dem.c:1257
#4 0x40cc3e in cplus_demangle ../../libiberty/cplus-dem.c:918
#5 0x404a2c in main ../../../libiberty/testsuite/test-demangle.c:317
#6 0x7ffff707ca86 in __libc_start_main (/lib64/libc.so.6+0x21a86)
#7 0x405269 in _start
(/home/marxin/Programming/gcc/objdir3/libiberty/testsuite/test-demangle+0x405269)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
>From gcc-bugs-return-598165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:33:49 2018
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Subject: [Bug demangler/84951] New: UBSAN: libiberty/d-demangle.c:209:14: runtime error: signed integer overflow: 922337203685477581 * 10 cannot be represented in type 'long int'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84951
Bug ID: 84951
Summary: UBSAN: libiberty/d-demangle.c:209:14: runtime error:
signed integer overflow: 922337203685477581 * 10
cannot be represented in type 'long int'
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: demangler
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Blocks: 63426
Target Milestone: ---
Following causes trouble:
$ cat /tmp/todo2
#
--format=dlang
_D9223372036854775817
_D9223372036854775817
$ ./libiberty/testsuite/test-demangle < /tmp/todo2
../../libiberty/d-demangle.c:209:14: runtime error: signed integer overflow:
922337203685477581 * 10 cannot be represented in type 'long int'
#0 0x457e1f in dlang_number ../../libiberty/d-demangle.c:209
#1 0x45af90 in dlang_identifier ../../libiberty/d-demangle.c:788
#2 0x45c43c in dlang_parse_qualified ../../libiberty/d-demangle.c:1437
#3 0x45cc6e in dlang_parse_mangle ../../libiberty/d-demangle.c:1354
#4 0x45d361 in dlang_demangle ../../libiberty/d-demangle.c:1633
#5 0x40cce1 in cplus_demangle ../../libiberty/cplus-dem.c:913
#6 0x404a2c in main ../../../libiberty/testsuite/test-demangle.c:317
#7 0x7ffff707ca86 in __libc_start_main (/lib64/libc.so.6+0x21a86)
#8 0x405269 in _start
(/home/marxin/Programming/gcc/objdir3/libiberty/testsuite/test-demangle+0x405269)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
Date: Mon, 19 Mar 2018 12:49:00 -0000
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--- Comment #3 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #2)
> I think as there are already quite some __GLIBC_PREREQ uses in the
> sanitizer lib changing the above prototype appropriately would be
> good enough.
If that's the way to go, then your patch should work. I'd add a comment:
/* glibc 2.27 changed internal ABI and removed internal_function. */
And perhaps the condition can be simplified to:
#if defined (__i386__) && defined (__GLIBC_PREREQ) && !__GLIBC_PREREQ(2, 27)
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Subject: [Bug tree-optimization/84929] [8 Regression] ICE at -O3 on valid code on x86_64-linux-gnu: tree check: expected polynomial_chrec, have nop_expr in analyze_siv_subscript_cst_affine, at tree-data-ref.c:3018
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 19 12:49:30 2018
New Revision: 258643
URL: https://gcc.gnu.org/viewcvs?rev=258643&root=gcc&view=rev
Log:
2018-03-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/84929
* tree-data-ref.c (analyze_siv_subscript_cst_affine): Guard
chrec_is_positive against non-chrec arg.
* gcc.dg/torture/pr84929.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr84929.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-data-ref.c
>From gcc-bugs-return-598168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 12:52:55 2018
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That won't really work, if you configure against one glibc version and run
against another one, that will still not work properly.
So I think we need something like:
--- libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc 2017-10-19
13:20:58.972958379 +0200
+++ libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc 2018-03-19
13:50:41.978147828 +0100
@@ -151,25 +151,35 @@ bool SanitizerGetThreadName(char *name,
!SANITIZER_NETBSD
static uptr g_tls_size;
-#ifdef __i386__
-# define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
-#else
-# define DL_INTERNAL_FUNCTION
-#endif
-
void InitTlsSize() {
// all current supported platforms have 16 bytes stack alignment
const size_t kStackAlign = 16;
- typedef void (*get_tls_func)(size_t*, size_t*) DL_INTERNAL_FUNCTION;
- get_tls_func get_tls;
- void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info");
- CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr));
- internal_memcpy(&get_tls, &get_tls_static_info_ptr,
- sizeof(get_tls_static_info_ptr));
- CHECK_NE(get_tls, 0);
size_t tls_size = 0;
size_t tls_align = 0;
- get_tls(&tls_size, &tls_align);
+ void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info");
+#ifdef __i386__
+ /* On i?86, _dl_get_tls_static_info used to be regparm(3) before glibc 2.27
+ and is now a normal function. */
+ if (!dlvsym(RTLD_NEXT, "glob", "GLIBC_2.27")) {
+ typedef void (*get_tls_func)(size_t*, size_t*)
+ __attribute__((regparm(3), stdcall));
+ get_tls_func get_tls;
+ CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr));
+ internal_memcpy(&get_tls, &get_tls_static_info_ptr,
+ sizeof(get_tls_static_info_ptr));
+ CHECK_NE(get_tls, 0);
+ get_tls(&tls_size, &tls_align);
+ } else
+#endif
+ {
+ typedef void (*get_tls_func)(size_t*, size_t*);
+ get_tls_func get_tls;
+ CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr));
+ internal_memcpy(&get_tls, &get_tls_static_info_ptr,
+ sizeof(get_tls_static_info_ptr));
+ CHECK_NE(get_tls, 0);
+ get_tls(&tls_size, &tls_align);
+ }
if (tls_align < kStackAlign)
tls_align = kStackAlign;
g_tls_size = RoundUpTo(tls_size, tls_align);
instead. If we only support using the glibc with which gcc has been configured
or later, perhaps that dlvsym call could be avoided if __GLIBC_PREREQ(2, 27).
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Subject: [Bug c/84890] Overly verbose notes for missing headers
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I have very little sympathy for anybody who thinks that an automated message
from a compiler is "kind of personal", but how about instead of asking a
question or equivocating with "you may want to ..." just say what the required
header is:
#include <foo.h> to define std::foo
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Subject: [Bug c++/53281] poor error message for calling a non-const method from a const object
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #6)
> It seems best to special-case the "const member fn/param called with
> non-const" cases and to report them directly in terms of the types in user's
> source with and without "const", and to be explicit about which qualifier(s)
> are lost.
Don't forget 'volatile', which is rarely used for member function qualifiers,
but we might as well handle both at once (as my patches above do).
> Proposed output for the case in comment #3:
>
> cv.cc: In member function ‘void Foo::bar2(const Foo&)’:
> cv.cc:4:26: error: passing ‘const Foo’ as ‘this’ argument discards 'const'
> qualifier [-fpermissive]
> foo.bar1();
> ^
> cv.cc:2:14: note: in call to ‘void Foo::bar1()’ which is non-const
> void bar1() {}
> ^~~~
This has a number of problems, see comment 5 for discussion and a patch.
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2018-03-19
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43701
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43701&action=edit
gcc8-pr84761.patch
Full untested patch, tested so far just with building against glibc 2.26 and
running a simple 32-bit -fsanitize=address sanitized program against:
1) unpatched libasan.so.5 and glibc 2.26
2) unpatched libasan.so.5 and glibc 2.27 (this crashes)
3) patched libasan.so.5 and glibc 2.26
4) patched libasan.so.5 and glibc 2.27
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Subject: [Bug c++/84918] Better handling of "std::cout >> 42;"
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> I'd much rather see a solution to the more general problem of drowning the
> user in information when the overload set is very large.
Which is now PR 84920
>From gcc-bugs-return-598173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 13:50:40 2018
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
Date: Mon, 19 Mar 2018 13:50:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Filed https://reviews.llvm.org/D44623 upstream.
>From gcc-bugs-return-598174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 13:51:59 2018
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
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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> ---
Is it possible that a distribution would backport glob() changes together with
its symver update (without also backporting the regparm change)? In that case
the dlvsym check shown above will be wrong I think.
Would the approach with confstr query for glibc version (discussed on irc) be
less fragile?
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Subject: [Bug sanitizer/84761] AddressSanitizer is not compatible with glibc 2.27 on x86
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Distributions should never backport symbol additions to symbol versioned
libraries, unless they backport all the corresponding changes.
So no, I don't think this is an issue.
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Subject: [Bug c++/84812] [8 Regression] ICE with local function
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--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Mon Mar 19 14:07:07 2018
New Revision: 258644
URL: https://gcc.gnu.org/viewcvs?rev=258644&root=gcc&view=rev
Log:
[C++/84812] ICE with local fn decl
https://gcc.gnu.org/ml/gcc-patches/2018-03/msg00872.html
PR c++/84812
* name-lookup.c (set_local_extern_decl_linkage): Defend against
ambiguous lookups.
PR c++/84812
* g++.dg/lookup/pr84812.C: New.
Added:
trunk/gcc/testsuite/g++.dg/lookup/pr84812.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
trunk/gcc/testsuite/ChangeLog
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
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--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r258644.
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Subject: [Bug tree-optimization/84935] FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Is that with r258590 in? I don't think hppa* is vect_int_mult effective
target.
>From gcc-bugs-return-598179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:09:09 2018
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
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Bug 56456 depends on bug 84859, which changed state.
Bug 84859 Summary: [8 Regression] bogus -Warray-bounds on a memcpy in a loop
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84859
What |Removed |Added
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Subject: [Bug tree-optimization/84859] [8 Regression] bogus -Warray-bounds on a memcpy in a loop
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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> ---
Fixed.
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 19 14:08:58 2018
New Revision: 258645
URL: https://gcc.gnu.org/viewcvs?rev=258645&root=gcc&view=rev
Log:
2018-03-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/84859
* tree-ssa-phiopt.c (single_trailing_store_in_bb): New function.
(cond_if_else_store_replacement): Perform sinking operation on
single-store BBs regardless of MAX_STORES_TO_SINK setting.
Generalize what a BB with a single eligible store is.
* gcc.dg/tree-ssa/pr84859.c: New testcase.
* gcc.dg/tree-ssa/pr35286.c: Disable cselim.
* gcc.dg/tree-ssa/split-path-6.c: Likewise.
* gcc.dg/tree-ssa/split-path-7.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr84859.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr35286.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-6.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-7.c
trunk/gcc/tree-ssa-phiopt.c
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Subject: [Bug tree-optimization/84929] [8 Regression] ICE at -O3 on valid code on x86_64-linux-gnu: tree check: expected polynomial_chrec, have nop_expr in analyze_siv_subscript_cst_affine, at tree-data-ref.c:3018
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/84933] [8 Regression] ICE in set_value_range, at tree-vrp.c:288 since r257852
Date: Mon, 19 Mar 2018 14:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84933
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 19 14:11:05 2018
New Revision: 258646
URL: https://gcc.gnu.org/viewcvs?rev=258646&root=gcc&view=rev
Log:
2018-03-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/84933
* tree-vrp.c (set_and_canonicalize_value_range): Treat out-of-bound
values as -INF/INF when canonicalizing an ANTI_RANGE to a RANGE.
* g++.dg/pr84933.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/pr84933.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c
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Subject: [Bug tree-optimization/84933] [8 Regression] ICE in set_value_range, at tree-vrp.c:288 since r257852
Date: Mon, 19 Mar 2018 14:11:00 -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.
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Subject: [Bug ipa/84947] UBSAN: ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >, generic_wide_int<fixed_wide_int_storage<192> >, unsigned int) ../../gcc/ipa-cp.c:1058
Date: Mon, 19 Mar 2018 14:12:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Because:
(gdb) p debug_tree(parm_type)
<record_type 0x7ffff52be930 a BLK
size <integer_cst 0x7ffff50c5c60 type <integer_type 0x7ffff50d90a8
bitsizetype> constant 0>
unit-size <integer_cst 0x7ffff50c5c18 type <integer_type 0x7ffff50d9000
sizetype> constant 0>
align:8 warn_if_not_align:0 symtab:0 alias-set 2 canonical-type
0x7ffff52be930 context <translation_unit_decl 0x7ffff50cf1e0 b.c>
chain <type_decl 0x7ffff52c0130 D.4324>>
In the original testcase it's also zero for:
$ gcc -flto /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lto/20120723_*.c
-O2
(gdb) p parm_type
$2 = (tree) 0x7ffff52be690
(gdb) p debug_tree(parm_type)
<record_type 0x7ffff52be690 E DI
size <integer_cst 0x7ffff50c5be8 type <integer_type 0x7ffff50d90a8
bitsizetype> constant 64>
unit-size <integer_cst 0x7ffff50c5c00 type <integer_type 0x7ffff50d9000
sizetype> constant 8>
align:64 warn_if_not_align:0 symtab:0 alias-set 2 canonical-type
0x7ffff52be690
fields <field_decl 0x7ffff52c05f0 p
type <pointer_type 0x7ffff52be738 type <record_type 0x7ffff52be7e0 S>
unsigned DI size <integer_cst 0x7ffff50c5be8 64> unit-size
<integer_cst 0x7ffff50c5c00 8>
align:64 warn_if_not_align:0 symtab:0 alias-set 1
structural-equality
pointer_to_this <pointer_type 0x7ffff52be348>>
unsigned DI
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lto/20120723_1.c:15:13 size
<integer_cst 0x7ffff50c5be8 64> unit-size <integer_cst 0x7ffff50c5c00 8>
align:64 warn_if_not_align:0 offset_align 128
offset <integer_cst 0x7ffff50c5c18 constant 0>
bit-offset <integer_cst 0x7ffff50c5c60 constant 0> context <record_type
0x7ffff52be690 E>> context <translation_unit_decl 0x7ffff50cf1e0
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/lto/20120723_1.c>
chain <type_decl 0x7ffff52c0688 D.4340>>
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Subject: [Bug tree-optimization/84935] FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
Date: Mon, 19 Mar 2018 14:13:00 -0000
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--- Comment #3 from dave.anglin at bell dot net ---
On 2018-03-19 10:08 AM, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84935
>
> --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Is that with r258590 in? I don't think hppa* is vect_int_mult effective
> target.
>
No. It was seen with r258555.
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Subject: [Bug tree-optimization/84935] FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
Date: Mon, 19 Mar 2018 14:13:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 19 Mar 2018, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84935
>
> --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Is that with r258590 in? I don't think hppa* is vect_int_mult effective
> target.
The rev wasn't supposed to go in. The testcase was really supposed
to verify we either vectorize both loops or none.
It shows with nvptx that still fails and so that's a bug (and thus
the testcase should be XFAILed there).
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Subject: [Bug ipa/84947] UBSAN: ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >, generic_wide_int<fixed_wide_int_storage<192> >, unsigned int) ../../gcc/ipa-cp.c:1058
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
bool
propagate_bits_across_jump_function (cgraph_edge *cs, int idx,
ipa_jump_func *jfunc,
ipcp_bits_lattice *dest_lattice)
{
...
/* For K&R C programs, ipa_get_type() could return NULL_TREE.
Avoid the transform for these cases. */
if (!parm_type)
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Setting dest_lattice to bottom, because"
" param %i type is NULL for %s\n", idx,
cs->callee->name ());
return dest_lattice->set_to_bottom ();
}
unsigned precision = TYPE_PRECISION (parm_type);
signop sgn = TYPE_SIGN (parm_type);
those two accesses only work for INTEGRAL_TYPE_P types. So maybe
the !parm_type should be instead
if (!parm_type || !INTEGRAL_TYPE_P (parm_type))
? (with appropriate adjustment of the dump message)
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/84947] UBSAN: ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >, generic_wide_int<fixed_wide_int_storage<192> >, unsigned int) ../../gcc/ipa-cp.c:1058
Date: Mon, 19 Mar 2018 14:19:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> bool
> propagate_bits_across_jump_function (cgraph_edge *cs, int idx,
> ipa_jump_func *jfunc,
> ipcp_bits_lattice *dest_lattice)
> {
> ...
> /* For K&R C programs, ipa_get_type() could return NULL_TREE.
> Avoid the transform for these cases. */
> if (!parm_type)
> {
> if (dump_file && (dump_flags & TDF_DETAILS))
> fprintf (dump_file, "Setting dest_lattice to bottom, because"
> " param %i type is NULL for %s\n", idx,
> cs->callee->name ());
>
> return dest_lattice->set_to_bottom ();
> }
>
> unsigned precision = TYPE_PRECISION (parm_type);
> signop sgn = TYPE_SIGN (parm_type);
>
> those two accesses only work for INTEGRAL_TYPE_P types. So maybe
> the !parm_type should be instead
>
> if (!parm_type || !INTEGRAL_TYPE_P (parm_type))
!(INTEGRAL_TYPE_P (parm_type) || POINTER_TYPE_P (parm_type))
of course.
> ? (with appropriate adjustment of the dump message)
Does IPA-CP in any way handle jump functions of float types?
>From gcc-bugs-return-598190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:20:17 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/84935] FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
Date: Mon, 19 Mar 2018 14:20:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems it actually is vectorized, probably just using DImode vectors for
2xSImode,
and dom doesn't handle vector stores followed by scalar loads. Before
store-merging the dump is:
MEM[(int *)&a] = { 0, 1 };
MEM[(int *)&a + 8B] = { 4, 9 };
MEM[(int *)&a + 16B] = { 16, 25 };
MEM[(int *)&a + 24B] = { 36, 49 };
MEM[(int *)&a + 32B] = { 64, 81 };
_6 = a[0];
_28 = a[1];
res_29 = _6 + _28;
_35 = a[2];
res_36 = res_29 + _35;
_42 = a[3];
res_43 = res_36 + _42;
_49 = a[4];
res_50 = res_43 + _49;
_56 = a[5];
res_57 = res_50 + _56;
_63 = a[6];
res_64 = res_57 + _63;
_70 = a[7];
res_71 = res_64 + _70;
_77 = a[8];
res_78 = res_71 + _77;
_2 = a[9];
res_11 = _2 + res_78;
a ={v} {CLOBBER};
return res_11;
and nothing really changes till *.optimized in it.
>From gcc-bugs-return-598191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:22:33 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/84935] FAIL: gcc.dg/tree-ssa/pr84512.c scan-tree-dump optimized "return 285;"
Date: Mon, 19 Mar 2018 14:22:00 -0000
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 19 Mar 2018, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84935
>
> --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Seems it actually is vectorized, probably just using DImode vectors for
> 2xSImode,
> and dom doesn't handle vector stores followed by scalar loads. Before
> store-merging the dump is:
> MEM[(int *)&a] = { 0, 1 };
> MEM[(int *)&a + 8B] = { 4, 9 };
> MEM[(int *)&a + 16B] = { 16, 25 };
> MEM[(int *)&a + 24B] = { 36, 49 };
> MEM[(int *)&a + 32B] = { 64, 81 };
> _6 = a[0];
> _28 = a[1];
> res_29 = _6 + _28;
> _35 = a[2];
> res_36 = res_29 + _35;
> _42 = a[3];
> res_43 = res_36 + _42;
> _49 = a[4];
> res_50 = res_43 + _49;
> _56 = a[5];
> res_57 = res_50 + _56;
> _63 = a[6];
> res_64 = res_57 + _63;
> _70 = a[7];
> res_71 = res_64 + _70;
> _77 = a[8];
> res_78 = res_71 + _77;
> _2 = a[9];
> res_11 = _2 + res_78;
> a ={v} {CLOBBER};
> return res_11;
> and nothing really changes till *.optimized in it.
Similar as with nvptx. Yes, DOM doesn't handle this while FRE would.
>From gcc-bugs-return-598192-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:25:13 2018
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Subject: [Bug ipa/84947] UBSAN: ipcp_bits_lattice::meet_with(generic_wide_int<fixed_wide_int_storage<192> >, generic_wide_int<fixed_wide_int_storage<192> >, unsigned int) ../../gcc/ipa-cp.c:1058
Date: Mon, 19 Mar 2018 14:25:00 -0000
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
I can confirm it works for me:
diff --git a/gcc/ipa-cp.c b/gcc/ipa-cp.c
index ee41a8d55b7..96fff686a3a 100644
--- a/gcc/ipa-cp.c
+++ b/gcc/ipa-cp.c
@@ -1813,7 +1813,8 @@ propagate_bits_across_jump_function (cgraph_edge *cs, int
idx,
/* For K&R C programs, ipa_get_type() could return NULL_TREE.
Avoid the transform for these cases. */
- if (!parm_type)
+ if (!parm_type || !(INTEGRAL_TYPE_P (parm_type)
+ || POINTER_TYPE_P (parm_type)))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "Setting dest_lattice to bottom, because"
I'm leaving that to Martin.
>From gcc-bugs-return-598193-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:30:57 2018
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Subject: [Bug c++/84920] Better handling of unmatched/ambiguous calls
Date: Mon, 19 Mar 2018 14:30:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #0)
> As reported by user "jcoffland" on Hacker News:
> https://news.ycombinator.com/item?id=16598071
>
> > One improvement I'd like to see is a simplified error message
> > for mismatched overloaded calls. If you make an overloaded call
> > for which the is no matching conversion or if the conversation is
> > ambiguous the compiler will "helpfully" dump a list of possibly
> > matching overloaded function signatures. The list can be hundreds
> > of lines long.
It's rare to get hundreds of lines in general. That usually only happens for
iostream operator<< and operator>>, because not many operators have as many
overloads all in the same namespace. But a general solution wouldn't hurt.
> > For example, when you try to pipe a class to std::cout that
> > doesn't have an std::ostream &operator<<(std::ostream &, const X &).
> > Perhaps instead of dumping the complete function signatures it
> > could show one function signature followed by a list of types
> > accepted as the second parameter. Since the signatures are
> > otherwise the same.
I like the idea, but this isn't *strictly* true, as there's a function template
taking an rvalue stream as the first parameter, but that should accept all the
same types as the version for lvalue streams, so showing it doesn't add much
value.
The other advantages of the signatures is that they include the location info,
so if an overload doesn't match because of a SFINAE constraint you can go and
check the source, e.g. given
#include <ostream>
template<typename T> struct A { T value; };
template<typename T>
auto operator<<(std::ostream& o, const A<T>& a)
-> decltype(o << a.value)
{ return o << a.value; }
struct Y { };
void f(std::ostream& o, const A<Y>& a)
{
o << a;
}
Included in the output is:
a.cc:5:6: note: candidate: template<class T> decltype ((o << a.value))
operator<<(std::ostream&, const A<T>&)
auto operator<<(std::ostream& o, const A<T>& a)
^~~~~~~~
a.cc:5:6: note: template argument deduction/substitution failed:
a.cc: In substitution of ‘template<class T> decltype ((o << a.value))
operator<<(std::ostream&, const A<T>&) [with T = Y]’:
a.cc:13:8: required from here
a.cc:6:15: error: no match for ‘operator<<’ (operand types are ‘std::ostream
{aka std::basic_ostream<char>}’ and ‘const Y’)
-> decltype(o << a.value)
~~^~~~~~~~~~
which points to a.cc:5:6 as the location of the overload, and the expression at
a.cc:6:15 is potentially useful infomration.
Maybe we could special-case the overloads from namespace std, since they are
usually less interesting. Usually.
More generally, maybe add -foverload-candidates-limit=N so if the overload set
is above the limit don't show the notes with the reasons overload resolution
failed, just show the candidates.
>From gcc-bugs-return-598194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:31:03 2018
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Subject: [Bug middle-end/83665] [8 regression] Big code size regression and some code quality improvement at Jan 2 2018
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--- Comment #15 from Martin Liška <marxin at gcc dot gnu.org> ---
Honza, may I close this as fixed?
>From gcc-bugs-return-598195-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:34:13 2018
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Daniel Krügler from comment #3)
> A possible fix might be to change the Standard ;-) Despite the smiley I
> seriously consider to make the proposal/open an issue that the "all-eating"
> signature
That was done, and implemented in libstdc++.
Maybe any remaining improvements should be left to PR c++/84920 and this one
closed? (The original report of inconsistent behaviour was just due to
forgetting -std=c++11, and the greedy rvalue overload is constrained now so the
output is similar for c++11 and c++98 anyway).
>From gcc-bugs-return-598196-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:34:41 2018
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Closing (see comment 8).
>From gcc-bugs-return-598197-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:48:59 2018
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Subject: [Bug middle-end/54183] Generate __udivmoddi4 instead of __udivdi3 plus __umoddi3
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jimis <jimis at gmx dot net> changed:
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--- Comment #6 from jimis <jimis at gmx dot net> ---
Thanks, closing ticket then!
*** This bug has been marked as a duplicate of bug 84759 ***
>From gcc-bugs-return-598198-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:49:00 2018
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Subject: [Bug target/84759] Calculation of quotient and remainder with constant denominator uses __umoddi3+__udivdi3 instead of __udivmoddi4
Date: Mon, 19 Mar 2018 14:48:00 -0000
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--- Comment #2 from jimis <jimis at gmx dot net> ---
*** Bug 54183 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-598199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:53:21 2018
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Subject: [Bug c/84919] [8 Regression] error: passing argument 1 to restrict-qualified parameter aliases with argument 5 [-Werror=restrict]
Date: Mon, 19 Mar 2018 14:53:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Not aware of any right now, but 1) if the format string is not compile time
known, we don't know if it is %p or not 2) the format string parsing is done in
other passes (-Wformat code in FEs, and gimple-ssa-sprintf.c) compared to the
restrict warning.
>From gcc-bugs-return-598200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 14:57:52 2018
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Subject: [Bug c/84919] [8 Regression] error: passing argument 1 to restrict-qualified parameter aliases with argument 5 [-Werror=restrict]
Date: Mon, 19 Mar 2018 14:57:00 -0000
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--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Jakub Jelinek from comment #8)
> Not aware of any right now, but 1) if the format string is not compile time
> known, we don't know if it is %p or not 2) the format string parsing is done
We only need to handle the known format string case.
> in other passes (-Wformat code in FEs, and gimple-ssa-sprintf.c) compared to
> the restrict warning.
This shouldn't be the reason not to do it.
>From gcc-bugs-return-598201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:00:44 2018
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Subject: [Bug c++/84927] [7/8 Regressiion] ICE with NSDMI and reference
Date: Mon, 19 Mar 2018 15:00:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'd like to try to fix this one.
>From gcc-bugs-return-598202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:02:08 2018
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Subject: [Bug middle-end/84891] -fno-signed-zeros leads to optimization which should be possible only if also -ffinite-math-only is on
Date: Mon, 19 Mar 2018 15:02:00 -0000
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--- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Mar 19, 2018 at 11:46:11AM +0000, rguenth at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84891
>
> Richard Biener <rguenth at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |kargl at gcc dot gnu.org,
> | |pault at gcc dot gnu.org
>
> --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
> (In reply to joseph@codesourcery.com from comment #2)
> > I'm not sure what the C++ complex multiplication / division requirements
> > are here (for that matter, C doesn't seem to precisely define which NaN -
> > which value with at least one NaN part and the other part not infinite -
> > is produced from complex multiplication / division in this case, though
> > NaN + iNaN probably makes more sense).
>
> I don't see anything in the C++ standard going into detail here either.
> It simply says (from C++14 26.4/3):
>
> "If the result of a function is not mathematically defined or not in the
> range of representable vaslues for its type, the behavior is undefined."
>
> which to my reading makes any operation with NaN/Inf undefined given
> "mathematically" a NaN or Inf does not exist.
>
> I can't find anything in the Fortran2008 standard specifying how
> arithmetic on intrinsic complex types work. CCing two Fortran maintainers
> to see whether Fortran requires us to do any changes here.
>
It's a little complicated. If the Fortran program isn't
using a module from the Fortran 2008, Sec. 14, "Exceptions
and IEEE arithmetic", then the following applies
F20008
7.1.5.2.4 Evaluation of numeric intrinsic operations
The execution of any numeric operation whose result is not defined
by the arithmetic used by the processor is prohibited. Raising a
negative-valued primary of type real to a real power is prohibited.
Note "the processor" here is "the compiler".
What complicates the matter is that Fortran makes a distinct
between a model number and a representable number. For gfortran
with a binary radix, the model numbers are essentially the normalized
finite IEEE 754 binary floating pointing numbers. The representable
numbers, which are a property of the compiler, can be considered to
include Inf/NaN and subnormal. So, in this Fortran program
program foo
x = 1
y = 0
call sub(x,y)
end program foo
subroutine sub(x,y)
print *, x/y
end subroutine sub
gfortran gives an Infinity on output with no error or warning.
gfortran does have the -ffpe-trap=zero option, which with enables
trapping of division-by-zero errors.
With all that said, gfortran uses the GCC backend, and follows
whatever is enforced by the backend.
>From gcc-bugs-return-598203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:03:33 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82965] [8 regression] gcc.dg/vect/pr79347.c starts failing after r254379
Date: Mon, 19 Mar 2018 15:03:00 -0000
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--- Comment #13 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #10 from bin.cheng <amker.cheng at gmail dot com> ---
> a proposed patch @https://gcc.gnu.org/ml/gcc-patches/2018-01/msg02419.html
I've regtested the patch on sparc-sun-solaris2.11 and
i386-pc-solaris2.11: the gcc.dg/vect/pr79347.c failures are gone on the
former, no change on the latter.
Thanks.
Rainer
>From gcc-bugs-return-598204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:05:43 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/84005] [8 regression] gcc.dg/vect/bb-slp-1.c etc. FAIL
Date: Mon, 19 Mar 2018 15:05:00 -0000
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--- Comment #10 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #9 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot
> gnu.org> ---
[...]
> Could you try the attached patch? It should restore the ability
> to look through steps when trying to align variables.
I've regtested the patch on sparc-sun-solaris2.11 (and
i386-pc-solaris2.11 for good measure): the bb-slp-*.c failures are gone
on sparc, no change on i386.
Thanks.
Rainer
>From gcc-bugs-return-598205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:14:25 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/84919] [8 Regression] error: passing argument 1 to restrict-qualified parameter aliases with argument 5 [-Werror=restrict]
Date: Mon, 19 Mar 2018 15:14:00 -0000
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--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #9)
> (In reply to Jakub Jelinek from comment #8)
> > Not aware of any right now, but 1) if the format string is not compile time
> > known, we don't know if it is %p or not 2) the format string parsing is done
>
> We only need to handle the known format string case.
>
> > in other passes (-Wformat code in FEs, and gimple-ssa-sprintf.c) compared to
> > the restrict warning.
>
> This shouldn't be the reason not to do it.
If there is no way to fix it, we should warn (char *) cases under -Wextra,
not under -Wall.
>From gcc-bugs-return-598206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:22:34 2018
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/84891] -fno-signed-zeros leads to optimization which should be possible only if also -ffinite-math-only is on
Date: Mon, 19 Mar 2018 15:22:00 -0000
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--- Comment #7 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, Mar 19, 2018 at 08:01:17AM -0700, Steve Kargl wrote:
> > I can't find anything in the Fortran2008 standard specifying how
> > arithmetic on intrinsic complex types work. CCing two Fortran maintainers
> > to see whether Fortran requires us to do any changes here.
I forgot about what I believe are default setting.
'-fcx-fortran-rules'
Complex multiplication and division follow Fortran rules. Range
reduction is done as part of complex division, but there is no
checking whether the result of a complex multiplication or division
is 'NaN + I*NaN', with an attempt to rescue the situation in that
case.
I also believe that
'-fcx-limited-range'
When enabled, this option states that a range reduction step is not
needed when performing complex division. Also, there is no
checking whether the result of a complex multiplication or division
is 'NaN + I*NaN', with an attempt to rescue the situation in that
case. The default is '-fno-cx-limited-range', but is enabled by
'-ffast-math'.
is active, but I can't find where either is set.
>From gcc-bugs-return-598207-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:32:47 2018
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From: "christoph@lipka-koeln.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/84949] -ffast-math bugged with respect to NaNs
Date: Mon, 19 Mar 2018 15:32:00 -0000
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--- Comment #2 from Christoph Lipka <christoph@lipka-koeln.de> ---
Having dug a bit deeper, I notice another way in which NaNs are broken in
-ffinite-math-only mode:
Normally, NaNs should always compare NON-EQUAL, even when compared to itself.
In -ffinite-math-only mode, NaNs ALWAYS compare EQUAL, even when compared to a
totally different value (such as, say, 0.0).
I would disagree with the claim that "NaNs are there" in -ffinite-math-only
mode - de facto they're not. What is there is one or more representations that
cause all sorts of undefined behaviour, which just so _happens_ to include
rendering as "nan" when converted to a string.
So my point stands that std::numeric_limits<T>::has_quiet_NaN() should return
false when -ffinite-math-only is active.
>From gcc-bugs-return-598208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:41:26 2018
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Subject: [Bug c/84919] [8 Regression] error: passing argument 1 to restrict-qualified parameter aliases with argument 5 [-Werror=restrict]
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83688,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=83859
--- Comment #11 from Martin Sebor <msebor at gcc dot gnu.org> ---
The warning will go away once -Wrestrict is implemented for sprintf, hopefully
in GCC 9 (the patch I submitted in July didn't make it to GCC 8:
https://gcc.gnu.org/ml/gcc-patches/2017-07/msg00036.html), and the handling for
the built-in functions removed from the front-end. This is being tracked in
bug 83688.
Until then, the only way to avoid the warning that I can think of is to exclude
from checking arguments passed through the ellipsis, but that will result in
some false negatives for sprintf et al. So the question is: do the benefits of
the warning outweigh the cost of the false positives.
The potential for false positives here also isn't limited to sprintf. It's a
general problem that affects user-defined functions as well. For example:
$ cat z.c && gcc -S -Wall z.c
void f (char* restrict, const char* restrict, const void*);
void g (char *s)
{
f (s, "", s);
}
z.c: In function ‘g’:
z.c:5:3: warning: passing argument 1 to restrict-qualified parameter aliases
with argument 3 [-Wrestrict]
f (s, "", s);
^
The only way to avoid these false positives (and negatives) is to add some
annotation to let users indicate how each argument is used (e.g., such as the
attributes read_only and write_only that I've been working on). This is being
tracked in bug 83859.
>From gcc-bugs-return-598210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:46:46 2018
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Subject: [Bug c++/84943] [8 Regression] internal compiler error: in build_call_a, at cp/call.c:374
Date: Mon, 19 Mar 2018 15:46:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org
--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Failed assertion here in build_call_a:
368 /* We invoke build_call directly for several library
369 functions. These may have been declared normally if
370 we're building libgcc, so we can't just check
371 DECL_ARTIFICIAL. */
372 gcc_assert (DECL_ARTIFICIAL (decl)
373 || !strncmp (IDENTIFIER_POINTER (DECL_NAME (decl)),
374 "__", 2));
375 mark_used (decl);
376 }
(gdb) p decl
$1 = <function_decl 0x7ffff1a1d000 a>
>From gcc-bugs-return-598209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:46:23 2018
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/84952] New: [nvptx] bar.sync generated in divergent code
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Bug ID: 84952
Summary: [nvptx] bar.sync generated in divergent code
Product: gcc
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[ As discussed here: https://gcc.gnu.org/ml/gcc-patches/2018-03/msg00408.html ]
Consider testcase workers.c:
...
int
main (void)
{
int a[10];
#pragma acc parallel loop worker
for (int i = 0; i < 10; i++)
a[i] = i;
return 0;
}
...
At -O2, we generate (edited for readability):
...
// BEGIN PREAMBLE
.version 3.1
.target sm_30
.address_size 64
// END PREAMBLE
// BEGIN FUNCTION DECL: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0);
//:FUNC_MAP "main$_omp_fn$0", 0x1, 0x20, 0x20
// BEGIN VAR DEF: __worker_bcast
.shared .align 8 .u8 __worker_bcast[8];
// BEGIN FUNCTION DEF: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0)
{
.reg .u64 %ar0;
ld.param.u64 %ar0,[%in_ar0];
.reg .u32 %r24;
.reg .u64 %r25;
.reg .pred %r26;
.reg .u64 %r27;
.reg .u64 %r28;
.reg .u64 %r29;
.reg .u64 %r30;
.reg .u64 %r31;
.reg .u64 %r32;
.reg .pred %r33;
.reg .pred %r34;
{
.reg .u32 %y;
mov.u32 %y,%tid.y;
setp.ne.u32 %r34,%y,0;
}
{
.reg .u32 %x;
mov.u32 %x,%tid.x;
setp.ne.u32 %r33,%x,0;
}
@ %r34 bra.uni $L6;
@ %r33 bra $L7;
mov.u64 %r25,%ar0;
// fork 2;
cvta.shared.u64 %r32,__worker_bcast;
st.u64 [%r32],%r25;
$L7:
$L6:
@ %r33 bra $L5;
// forked 2;
bar.sync 0;
cvta.shared.u64 %r31,__worker_bcast;
ld.u64 %r25,[%r31];
mov.u32 %r24,%tid.y;
setp.le.s32 %r26,%r24,9;
@ %r26 bra $L2;
bra $L3;
$L2:
ld.u64 %r27,[%r25];
cvt.s64.s32 %r28,%r24;
shl.b64 %r29,%r28,2;
add.u64 %r30,%r27,%r29;
st.u32 [%r30],%r24;
$L3:
bar.sync 1;
// joining 2;
$L5:
@ %r34 bra.uni $L8;
@ %r33 bra $L9;
// join 2;
$L9:
$L8:
ret;
}
...
[ Note the neutering of "join 2", that's PR84025 - [nvptx] Don't generate
branch-around-nothing ].
The problem is the positioning of bar.sync, inside the vector-neutering branch.
The documentation for bar.sync says:
...
Barriers are executed on a per-warp basis as if all the threads in a warp are
active. Thus, if any thread in a warp executes a bar instruction, it is as if
all the threads in the warp have executed the bar instruction. All threads in
the warp are stalled until the barrier completes, and the arrival count for the
barrier is incremented by the warp size (not the number of active threads in
the warp). In conditionally executed code, a bar instruction should only be
used if it is known that all threads evaluate the condition identically (the
warp does not diverge).
...
The documentation is somewhat contradictory, in that it first explains that
that it is executed on a per-warp basis (implying that only one thread
executing it should be fine), but then goes on to state that it should not be
executed in divergent mode (implying that all threads should execute it).
Either way, the safest form of usage is: don't execute in divergent mode.
As is evident from the example above, we do generate bar.sync in divergent
mode, and that should be fixed.
>From gcc-bugs-return-598211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:47:30 2018
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Subject: [Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'
Date: Mon, 19 Mar 2018 15:47:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #43696|0 |1
is obsolete| |
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43702
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43702&action=edit
gcc8-pr84945.patch
Untested fix with __cpu_features2 var for features 32+.
>From gcc-bugs-return-598212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 15:56:50 2018
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Subject: [Bug lto/84901] --dynamic-list=export is ignored in presence of -flto
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--- Comment #2 from Alex Khatskevich <avkhatskevich at gmail dot com> ---
It seems, like the commit (20 sep)
https://sourceware.org/ml/binutils-cvs/2017-09/msg00172.html
fixes the issue in gold.
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Subject: [Bug target/84952] [nvptx] bar.sync generated in divergent code
Date: Mon, 19 Mar 2018 15:58:00 -0000
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
For stage1, I have the following patch set:
...
git log --pretty=%s --reverse HEAD^^^..HEAD | cat -n
1 Fix branch-around-nothing
2 Fix bar.sync position
3 Verify bar.sync position
...
where 1 is a fix for PR84025, 2 is a fix for this PR and 3 is a verification
for this PR.
Using this patch set, we generate (edited for readability):
...
// BEGIN PREAMBLE
.version 3.1
.target sm_30
.address_size 64
// END PREAMBLE
// BEGIN FUNCTION DECL: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0);
//:FUNC_MAP "main$_omp_fn$0", 0x1, 0x20, 0x20
// BEGIN VAR DEF: __worker_bcast
.shared .align 8 .u8 __worker_bcast[8];
// BEGIN FUNCTION DEF: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0)
{
.reg .u64 %ar0;
ld.param.u64 %ar0,[%in_ar0];
.reg .u32 %r24;
.reg .u64 %r25;
.reg .pred %r26;
.reg .u64 %r27;
.reg .u64 %r28;
.reg .u64 %r29;
.reg .u64 %r30;
.reg .u64 %r31;
.reg .u64 %r32;
.reg .pred %r33;
.reg .pred %r34;
{
.reg .u32 %y;
mov.u32 %y,%tid.y;
setp.ne.u32 %r34,%y,0;
}
{
.reg .u32 %x;
mov.u32 %x,%tid.x;
setp.ne.u32 %r33,%x,0;
}
@ %r34 bra.uni $L6;
@ %r33 bra $L7;
mov.u64 %r25,%ar0;
// fork 2;
cvta.shared.u64 %r32,__worker_bcast;
st.u64 [%r32],%r25;
$L7:
$L6:
bar.sync 0;
// forked 2;
@ %r33 bra $L5;
cvta.shared.u64 %r31,__worker_bcast;
ld.u64 %r25,[%r31];
mov.u32 %r24,%tid.y;
setp.le.s32 %r26,%r24,9;
@ %r26 bra $L2;
bra $L3;
$L2:
ld.u64 %r27,[%r25];
cvt.s64.s32 %r28,%r24;
shl.b64 %r29,%r28,2;
add.u64 %r30,%r27,%r29;
st.u32 [%r30],%r24;
$L3:
// joining 2;
$L5:
bar.sync 1;
// join 2;
ret;
}
...
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Subject: [Bug target/84952] [nvptx] bar.sync generated in divergent code
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--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43703
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43703&action=edit
0001-Fix-branch-around-nothing.patch
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Subject: [Bug target/84952] [nvptx] bar.sync generated in divergent code
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43704
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0002-Fix-bar.sync-position.patch
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Subject: [Bug target/84952] [nvptx] bar.sync generated in divergent code
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43705
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0003-Verify-bar.sync-position.patch
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Subject: [Bug c/84919] [8 Regression] error: passing argument 1 to restrict-qualified parameter aliases with argument 5 [-Werror=restrict]
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--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Martin Sebor from comment #11)
>
> Until then, the only way to avoid the warning that I can think of is to
> exclude from checking arguments passed through the ellipsis, but that will
> result in some false negatives for sprintf et al. So the question is: do
> the benefits of the warning outweigh the cost of the false positives.
>
It is a regression that GCC 8 can't compile lib/str_error_r.c in Linux kernel
without modifications.
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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/84953] New: misleading warning from strpbrk(x,"")
Date: Mon, 19 Mar 2018 16:21:00 -0000
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Bug ID: 84953
Summary: misleading warning from strpbrk(x,"")
Product: gcc
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The following program prints a misleading warning:
$ cat t1.c
#include <string.h>
char* test(char *p)
{
p = strpbrk(p, "");
return p;
}
$ gcc -c t1.c
t1.c: In function ‘test’:
t1.c:4:5: warning: assignment discards ‘const’ qualifier from pointer target
type [-Wdiscarded-qualifiers]
p = strpbrk(p, "");
^
The code _is_ bogus, because strpbrk does not make sense with "" as second
Parameter and strpbrk will always return null.
It is just the warning could be much more helpful if the empty string
constant is diagnosed.
Issue was originally found here: https://github.com/openssl/openssl/pull/5666
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Subject: [Bug target/84954] New: [nvptx] prevent_branch_around_nothing doesn't trigger often enough
Date: Mon, 19 Mar 2018 16:50:00 -0000
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Bug ID: 84954
Summary: [nvptx] prevent_branch_around_nothing doesn't trigger
often enough
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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[ Encountered at PR84952 - [nvptx] bar.sync generated in divergent code ]
Consider testcase workers.c:
...
int
main (void)
{
int a[10];
#pragma acc parallel loop worker
for (int i = 0; i < 10; i++)
a[i] = i;
return 0;
}
...
At -O2, we generate (edited for readability):
...
// BEGIN PREAMBLE
.version 3.1
.target sm_30
.address_size 64
// END PREAMBLE
// BEGIN FUNCTION DECL: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0);
//:FUNC_MAP "main$_omp_fn$0", 0x1, 0x20, 0x20
// BEGIN VAR DEF: __worker_bcast
.shared .align 8 .u8 __worker_bcast[8];
// BEGIN FUNCTION DEF: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0)
{
.reg .u64 %ar0;
ld.param.u64 %ar0,[%in_ar0];
.reg .u32 %r24;
.reg .u64 %r25;
.reg .pred %r26;
.reg .u64 %r27;
.reg .u64 %r28;
.reg .u64 %r29;
.reg .u64 %r30;
.reg .u64 %r31;
.reg .u64 %r32;
.reg .pred %r33;
.reg .pred %r34;
{
.reg .u32 %y;
mov.u32 %y,%tid.y;
setp.ne.u32 %r34,%y,0;
}
{
.reg .u32 %x;
mov.u32 %x,%tid.x;
setp.ne.u32 %r33,%x,0;
}
@ %r34 bra.uni $L6;
@ %r33 bra $L7;
mov.u64 %r25,%ar0;
// fork 2;
cvta.shared.u64 %r32,__worker_bcast;
st.u64 [%r32],%r25;
$L7:
$L6:
@ %r33 bra $L5;
// forked 2;
bar.sync 0;
cvta.shared.u64 %r31,__worker_bcast;
ld.u64 %r25,[%r31];
mov.u32 %r24,%tid.y;
setp.le.s32 %r26,%r24,9;
@ %r26 bra $L2;
bra $L3;
$L2:
ld.u64 %r27,[%r25];
cvt.s64.s32 %r28,%r24;
shl.b64 %r29,%r28,2;
add.u64 %r30,%r27,%r29;
st.u32 [%r30],%r24;
$L3:
bar.sync 1;
// joining 2;
$L5:
@ %r34 bra.uni $L8;
@ %r33 bra $L9;
// join 2;
$L9:
$L8:
ret;
}
...
prevent_branch_around_nothing should be generating a nop next to the "join 2".
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Subject: [Bug c++/84905] Improve warning for __attribute__((const)) on function returning void
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Agreed that the new attributes warnings should be mentioned in
gcc-8/changes.html (I still need to submit my updates).
This particular warning is issued based on the note in the manual: "It does not
make sense for a const function to return void" (it might be worthwhile to
expand on why it doesn't make sense in case it's not clear from the prior
text). I tend to prefer descriptive warnings over other kinds and I'm not sure
that changing it to say "attribute const doesn't make sense for a void
function" would be an improvement. Either way, as in many other cases, to
understand this warning the user needs to know why the attribute doesn't make
sense and that cannot easily be summed up in a single sentence. The only way
to find that out is to read up on what the attribute is used for by GCC.
Jon, unless you have a suggestion for a different phrasing that makes it
clearer I'm inclined to resolve this part of the report as won't fix.
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Subject: [Bug target/84574] Function return thunks shouldn't be aliased to indirect branch thunks
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--- Comment #3 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Mon Mar 19 16:52:13 2018
New Revision: 258647
URL: https://gcc.gnu.org/viewcvs?rev=258647&root=gcc&view=rev
Log:
i386: Don't generate alias for function return thunk
Function return thunks shouldn't be aliased to indirect branch thunks
since indirect branch thunks are placed in COMDAT section and a COMDAT
section with indirect branch may not have function return thunk. This
patch generates function return thunks directly.
gcc/
Backport from mainline
2018-03-15 H.J. Lu <hongjiu.lu@intel.com>
PR target/84574
* config/i386/i386.c (indirect_thunk_needed): Update comments.
(indirect_thunk_bnd_needed): Likewise.
(indirect_thunks_used): Likewise.
(indirect_thunks_bnd_used): Likewise.
(indirect_return_needed): New.
(indirect_return_bnd_needed): Likewise.
(output_indirect_thunk_function): Add a bool argument for
function return.
(output_indirect_thunk_function): Don't generate alias for
function return thunk.
(ix86_code_end): Call output_indirect_thunk_function to generate
function return thunks.
(ix86_output_function_return): Set indirect_return_bnd_needed
and indirect_return_needed instead of indirect_thunk_bnd_needed
and indirect_thunk_needed.
gcc/testsuite/
Backport from mainline
2018-03-15 H.J. Lu <hongjiu.lu@intel.com>
PR target/84574
* gcc.target/i386/ret-thunk-9.c: Expect __x86_return_thunk
label instead of __x86_indirect_thunk label.
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/i386/i386.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.target/i386/ret-thunk-9.c
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Subject: [Bug target/84954] [nvptx] prevent_branch_around_nothing doesn't trigger often enough
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43706
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43706&action=edit
Tentative patch
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Subject: [Bug target/84952] [nvptx] bar.sync generated in divergent code
Date: Mon, 19 Mar 2018 16:54:00 -0000
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--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
For stage4, however, we want a fix without fixing optimization issue PR84025,
so we have:
...
$ git log --pretty=%s --reverse HEAD^^..HEAD | cat -n
1 Fix bar.sync position
2 Verify bar.sync position
...
which results in:
...
// BEGIN PREAMBLE
.version 3.1
.target sm_30
.address_size 64
// END PREAMBLE
// BEGIN FUNCTION DECL: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0);
//:FUNC_MAP "main$_omp_fn$0", 0x1, 0x20, 0x20
// BEGIN VAR DEF: __worker_bcast
.shared .align 8 .u8 __worker_bcast[8];
// BEGIN FUNCTION DEF: main$_omp_fn$0
.entry main$_omp_fn$0 (.param .u64 %in_ar0)
{
.reg .u64 %ar0;
ld.param.u64 %ar0,[%in_ar0];
.reg .u32 %r24;
.reg .u64 %r25;
.reg .pred %r26;
.reg .u64 %r27;
.reg .u64 %r28;
.reg .u64 %r29;
.reg .u64 %r30;
.reg .u64 %r31;
.reg .u64 %r32;
.reg .pred %r33;
.reg .pred %r34;
{
.reg .u32 %y;
mov.u32 %y,%tid.y;
setp.ne.u32 %r34,%y,0;
}
{
.reg .u32 %x;
mov.u32 %x,%tid.x;
setp.ne.u32 %r33,%x,0;
}
@ %r34 bra.uni $L6;
@ %r33 bra $L7;
mov.u64 %r25,%ar0;
// fork 2;
cvta.shared.u64 %r32,__worker_bcast;
st.u64 [%r32],%r25;
$L7:
$L6:
bar.sync 0;
@ %r33 bra $L5;
// forked 2;
cvta.shared.u64 %r31,__worker_bcast;
ld.u64 %r25,[%r31];
mov.u32 %r24,%tid.y;
setp.le.s32 %r26,%r24,9;
@ %r26 bra $L2;
bra $L3;
$L2:
ld.u64 %r27,[%r25];
cvt.s64.s32 %r28,%r24;
shl.b64 %r29,%r28,2;
add.u64 %r30,%r27,%r29;
st.u32 [%r30],%r24;
$L3:
// joining 2;
$L5:
bar.sync 1;
@ %r34 bra.uni $L8;
@ %r33 bra $L9;
// join 2;
$L9:
$L8:
ret;
}
...
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Subject: [Bug target/84952] [nvptx] bar.sync generated in divergent code
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--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43707
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0001-Fix-bar.sync-position.patch (stage4)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84952
--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 43708
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43708&action=edit
0002-Verify-bar.sync-position.patch (stage4)
>From gcc-bugs-return-598226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 16:58:33 2018
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Subject: [Bug target/84952] [nvptx] bar.sync generated in divergent code
Date: Mon, 19 Mar 2018 16:58:00 -0000
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--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #5)
> For stage4, however, we want a fix without fixing optimization issue
> PR84025
> ...
> @ %r34 bra.uni $L8;
> @ %r33 bra $L9;
> // join 2;
> $L9:
> $L8:
> ...
Now I realize that prevent_branch_around_nothing is not triggering here, while
it should. Filed PR84954 - "[nvptx] prevent_branch_around_nothing doesn't
trigger often enough"
>From gcc-bugs-return-598227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:04:39 2018
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Subject: [Bug tree-optimization/84946] [8 Regression] UBSAN: in mem_valid_for_store_merging ../../gcc/gimple-ssa-store-merging.c:3951
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43709
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43709&action=edit
gcc8-pr84946.patch
Untested fix.
>From gcc-bugs-return-598228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:17:12 2018
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Subject: [Bug c++/84905] Improve warning for __attribute__((const)) on function returning void
Date: Mon, 19 Mar 2018 17:17:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No suggestions here, I was just passing on it on. My response on IRC was pretty
much what you said: you need to read the manual to know what the attribute
does, the warning is not the place to put that info.
>From gcc-bugs-return-598229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:21:17 2018
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Subject: [Bug libstdc++/84949] -ffast-math bugged with respect to NaNs
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Christoph Lipka from comment #0)
> (B)
> std::numeric_limits<T>::has_quiet_NaN() is broken in that it claims that
> NaNs are supported.
Agreed.
> Seen with both g++ 4.8.4 on Ubuntu 14.04, as well as g++ 5.4.0 on MS Windows
> Subsystem for Linux
Neither of those compilers is still supported by the GCC project.
>From gcc-bugs-return-598230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:29:16 2018
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Subject: [Bug target/84826] ICE in extract_insn, at recog.c:2304 on arm-linux-gnueabi
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>From gcc-bugs-return-598231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:31:34 2018
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From: "dilyan.palauzov at aegee dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/84934] Installing the lto plugin where binutils will look for it
Date: Mon, 19 Mar 2018 17:31:00 -0000
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--- Comment #3 from ДилÑн Палаузов <dilyan.palauzov at aegee dot org> ---
For LLVM I filled the same request: https://bugs.llvm.org/show_bug.cgi?id=36802
.
>From gcc-bugs-return-598232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:35:02 2018
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Subject: [Bug lto/84901] --dynamic-list=export is ignored in presence of -flto
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Moved to
https://sourceware.org/bugzilla/show_bug.cgi?id=22983
>From gcc-bugs-return-598233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:44:14 2018
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/84953] misleading warning from strpbrk(x,"")
Date: Mon, 19 Mar 2018 17:44:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
DEF_LIB_BUILTIN (BUILT_IN_STRPBRK, "strpbrk",
BT_FN_STRING_CONST_STRING_CONST_STRING, ATTR_PURE_NOTHROW_NONNULL_LEAF)
DEF_FUNCTION_TYPE_2 (BT_FN_STRING_CONST_STRING_CONST_STRING,
BT_STRING, BT_CONST_STRING, BT_CONST_STRING)
>From gcc-bugs-return-598234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 17:47:44 2018
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Subject: [Bug fortran/84615] [8 Regression] Executable Segfault for some tests compiled with -m32 after r256284
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84615
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #15 from kargl at gcc dot gnu.org ---
(In reply to Janne Blomqvist from comment #12)
> So to be clear, the problem seems to be that while the code generation for
> the function itself appears Ok, it generates the interface wrong (i.e. uses
> the declared charlen kind instead of C_SIZE_T), and thus calling it doesn't
> work properly.
>
> I still have no idea where in the frontend code the error is.
I haven't looked, but suspect that you can force a
conversion to the correct charlen in
trans-intrinsic.c:gfc_conv_intrinsic_function_args
Well, for intrinsics, the above function has
if (e->ts.type == BT_CHARACTER)
{
gfc_conv_expr (&argse, e);
gfc_conv_string_parameter (&argse);
argarray[curr_arg++] = argse.string_length;
gcc_assert (curr_arg < nargs);
}
From trans-expr.c, one has
/* Makes sure se is suitable for passing as a function string parameter. */
/* TODO: Need to check all callers of this function. It may be abused. */
void
gfc_conv_string_parameter (gfc_se * se)
I suspect you can do a fold_convert here or a conversion
before the gfc_conv_expr.
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Subject: [Bug c/84953] misleading warning from strpbrk(x,"")
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84953
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
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Ever confirmed|0 |1
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Subject: [Bug c/84953] misleading warning from strpbrk(x,"")
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/builtins.c.jj 2018-03-07 22:51:58.871478732 +0100
+++ gcc/builtins.c 2018-03-19 18:49:45.313898848 +0100
@@ -9573,7 +9573,7 @@ fold_builtin_strpbrk (location_t loc, tr
if (p2[0] == '\0')
/* strpbrk(x, "") == NULL.
Evaluate and ignore s1 in case it had side-effects. */
- return omit_one_operand_loc (loc, TREE_TYPE (s1), integer_zero_node,
s1);
+ return omit_one_operand_loc (loc, type, integer_zero_node, s1);
if (p2[1] != '\0')
return NULL_TREE; /* Really call strpbrk. */
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Subject: [Bug middle-end/70359] [6/7/8 Regression] Code size increase for x86/ARM/others compared to gcc-5.3.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70359
--- Comment #42 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #36)
> WRT the division removal. That seems so profitable that a slight increase
> in codesize is warranted. So if we fix the other issue and the source of
> the remaining codesize regressions is the removal of the division, I would
> consider this BZ resolved.
Richi. Jeff.
Limiting the single_use with optimize_size as well may give us the best of both
worlds. Would you like me to post the [untested] patch below upstream? With
this patch code size is even smaller than GCC 5.3.
I really don't care. Actually, I'd prefer to do nothing and close the PR ;-).
Up to y'all.
diff --git a/gcc/match.pd b/gcc/match.pd
index f61c4d7440a..5d29bf62dc9 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -1290,11 +1290,12 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
/* X / C1 op C2 into a simple range test. */
(for cmp (simple_comparison)
(simplify
- (cmp (trunc_div:s @0 INTEGER_CST@1) INTEGER_CST@2)
+ (cmp (trunc_div:s@3 @0 INTEGER_CST@1) INTEGER_CST@2)
(if (INTEGRAL_TYPE_P (TREE_TYPE (@0))
&& integer_nonzerop (@1)
&& !TREE_OVERFLOW (@1)
- && !TREE_OVERFLOW (@2))
+ && !TREE_OVERFLOW (@2)
+ && (!optimize_size || single_use (@3)))
(with { tree lo, hi; bool neg_overflow;
enum tree_code code = fold_div_compare (cmp, @1, @2, &lo, &hi,
&neg_overflow); }
@@ -1456,9 +1457,10 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(for cmp (eq ne)
ocmp (lt ge)
(simplify
- (cmp (trunc_div @0 @1) integer_zerop)
+ (cmp (trunc_div@2 @0 @1) integer_zerop)
(if (TYPE_UNSIGNED (TREE_TYPE (@0))
- && (VECTOR_TYPE_P (type) || !VECTOR_TYPE_P (TREE_TYPE (@0))))
+ && (VECTOR_TYPE_P (type) || !VECTOR_TYPE_P (TREE_TYPE (@0)))
+ && (!optimize_size || single_use (@2)))
(ocmp @0 @1))))
/* X == C - X can never be true if C is odd. */
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Subject: [Bug bootstrap/84856] Bootstrap failure on riscv: comparison of integer expressions of different signedness
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--- Comment #5 from Jim Wilson <wilson at gcc dot gnu.org> ---
Author: wilson
Date: Mon Mar 19 18:08:24 2018
New Revision: 258650
URL: https://gcc.gnu.org/viewcvs?rev=258650&root=gcc&view=rev
Log:
RISC-V: Fix bootstrap failure.
gcc/
PR bootstrap/84856
* config/riscv/riscv.c (riscv_function_arg_boundary): Use
PREFERRED_STACK_BOUNDARY instead of STACK_BOUNDARY.
(riscv_first_stack_step): Likewise.
(riscv_option_override): Use STACK_BOUNDARY instead of
MIN_STACK_BOUNDARY.
* config/riscv/riscv.h (STACK_BOUNDARY): Renamed from
MIN_STACK_BOUNDARY.
(BIGGEST_ALIGNMENT): Set to 128.
(PREFERRED_STACK_BOUNDARY): Renamed from STACK_BOUNDARY.
(RISCV_STACK_ALIGN): Use PREFERRED_STACK_BOUNDARY instead of
STACK_BOUNDARY.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/riscv/riscv.c
trunk/gcc/config/riscv/riscv.h
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Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |wilson at gcc dot gnu.org
--- Comment #6 from Jim Wilson <wilson at gcc dot gnu.org> ---
Patch committed.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/84826] ICE in extract_insn, at recog.c:2304 on arm-linux-gnueabi
Date: Mon, 19 Mar 2018 18:11:00 -0000
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sudi at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu.org
--- Comment #3 from sudi at gcc dot gnu.org ---
So I looked into this. Turns out the actual issue is that USE_RETURN_INSN
(FALSE) changes its value and becomes false after pass ce3.
According to what I can see, arm_r3_live_at_start_p() starts to return true
after ce3.
+static bool
+arm_r3_live_at_start_p (void)
+{
+ /* Just look at cfg info, which is still close enough to correct at this
+ point. This gives false positives for broken functions that might use
+ uninitialized data that happens to be allocated in r3, but who cares? */
This particular test cares :P
+ return REGNO_REG_SET_P (df_get_live_out (ENTRY_BLOCK_PTR_FOR_FN (cfun)), 3);
+}
r3 in this test case is being allocated for b and after ifcvt, it becomes
partially defined and thus the liveness does not get killed. (Look below for
excerpt from ce3)
;; lr in 0 [r0] 3 [r3] 12 [ip] 13 [sp] 14 [lr]
;; lr use 0 [r0] 3 [r3] 12 [ip] 13 [sp]
;; lr def 100 [cc]
;; live in 0 [r0] 3 [r3] 12 [ip] 13 [sp] 14 [lr]
;; live gen 3 [r3] 100 [cc]
;; live kill
(note 5 1 47 2 [bb 2] NOTE_INSN_BASIC_BLOCK)
(note 47 5 2 2 NOTE_INSN_PROLOGUE_END)
(note 2 47 4 2 NOTE_INSN_DELETED)
(note 4 2 7 2 NOTE_INSN_FUNCTION_BEG)
(insn 7 4 10 2 (set (reg:CC 100 cc)
(compare:CC (reg:SI 0 r0 [ cD.5556 ])
(const_int 0 [0]))) "ice.i":6 193 {*arm_cmpsi_insn}
(expr_list:REG_DEAD (reg:SI 0 r0 [ cD.5556 ])
(nil)))
(insn 10 7 11 2 (cond_exec (ne (reg:CC 100 cc)
(const_int 0 [0]))
(set (reg:SI 3 r3 [orig:115 CHAIN.1_5(D)->bD.5567 ] [115])
(mem/j:SI (reg/f:SI 12 ip [orig:113 CHAIN.1D.5566 ] [113]) [1
CHAIN.1_5(D)->bD.5567+0 S4 A32]))) "ice.i":7 4068 {*p *arm_movsi_vfp}
(expr_list:REG_EQUIV (mem/j:SI (reg/f:SI 12 ip [orig:113 CHAIN.1D.5566 ]
[113]) [1 CHAIN.1_5(D)->bD.5567+0 S4 A32])
(nil)))
My question is:
1) Is there any easy way to avoid the false positives from
arm_r3_live_at_start_p()
2) Why is r3 still live at IN of BB2 when there is no reaching definition of
it? I mean also there will never be any reaching definition at IN of BB2. So
shouldn't all the liveness (barring the artificially create ones for the
prologues/stack requirements) be killed there? I know I may be over simplifying
all the intricate details of liveness analysis when I ask this question, but I
am looking for some help here!
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Subject: [Bug c/84953] misleading warning from strpbrk(x,"")
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84953
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43710
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43710&action=edit
gcc8-pr84953.patch
Untested fix.
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Subject: [Bug c/84953] [6/7/8 Regression] misleading warning from strpbrk(x,"")
Date: Mon, 19 Mar 2018 18:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84953
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |6.5
Summary|misleading warning from |[6/7/8 Regression]
|strpbrk(x,"") |misleading warning from
| |strpbrk(x,"")
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 3.[234] didn't warn, but already r90000 warns here.
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Subject: [Bug fortran/84955] New: [7/8 Regression] ICE in substitute_and_fold_dom_walker, at tree-ssa-propagate.c:1089
Date: Mon, 19 Mar 2018 18:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84955
Bug ID: 84955
Summary: [7/8 Regression] ICE in
substitute_and_fold_dom_walker, at
tree-ssa-propagate.c:1089
Product: gcc
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Changed between 20170205 and 20170212 :
$ cat z1.f90
subroutine s
integer :: i, j
!$acc parallel loop tile(2,3)
do i = 1, 10
do j = 1, 10
do
end do
end do
end do
!$acc end parallel loop
end
$ gfortran-7-20170205 -c z1.f90 -O2 -fopenacc
$ gfortran-8-20180318 -c z1.f90 -O0 -fopenacc
$
$ gfortran-8-20180318 -c z1.f90 -O2 -fopenacc
during GIMPLE pass: ccp
z1.f90:11:0:
end
internal compiler error: Segmentation fault
0xb9bd5f crash_signal
../../gcc/toplev.c:325
0xcf35b2 substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
../../gcc/tree-ssa-propagate.c:1089
0x11dc6ef dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:353
0xcf2ac0 substitute_and_fold_engine::substitute_and_fold()
../../gcc/tree-ssa-propagate.c:1173
0xc73959 ccp_finalize
../../gcc/tree-ssa-ccp.c:992
0xc73959 do_ssa_ccp
../../gcc/tree-ssa-ccp.c:2475
0xc73959 execute
../../gcc/tree-ssa-ccp.c:2518
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Subject: [Bug fortran/84955] [7/8 Regression] ICE in substitute_and_fold_dom_walker, at tree-ssa-propagate.c:1089
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--- Comment #1 from G. Steinmetz <gscfq@t-online.de> ---
Configured with --enable-checking=yes :
$ gfortran-8-20180318 -c z1.f90 -O2 -fopenacc
during GIMPLE pass: fixup_cfg
z1.f90:11:0:
end
internal compiler error: in operator[], at vec.h:841
0xd2490f vec<edge_def*, va_gc, vl_embed>::operator[](unsigned int)
../../gcc/vec.h:841
0xd2490f extract_true_false_edges_from_block(basic_block_def*, edge_def**,
edge_def**)
../../gcc/tree-cfg.c:9194
0xd29e5d gimple_verify_flow_info
../../gcc/tree-cfg.c:5740
0x87aeb3 verify_flow_info()
../../gcc/cfghooks.c:263
0xc09a71 execute_function_todo
../../gcc/passes.c:2006
0xc0a499 execute_todo
../../gcc/passes.c:2048
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Subject: [Bug c/84953] [6/7/8 Regression] misleading warning from strpbrk(x,"")
Date: Mon, 19 Mar 2018 18:29:00 -0000
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--- Comment #5 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
WOW! That was quick!
Note that strpbrk(p, "") is certainly worth a warning: in the original
context the second parameter was the result from a macro substitution,
that was far from obvious to spot, and strpbrk does not make much sense
with empty strings.
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Subject: [Bug c/84956] New: ICE in replace_block_by, at tree-ssa-tail-merge.c:1546
Date: Mon, 19 Mar 2018 18:33:00 -0000
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Bug ID: 84956
Summary: ICE in replace_block_by, at tree-ssa-tail-merge.c:1546
Product: gcc
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Derived from gcc/testsuite/gcc.dg/torture/pr82264.c
ICEs at -O[s23] on x86_64/linux, gcc-4.8 compiles.
$ cat z1.c
char a;
int c;
unsigned b ();
unsigned
setjmp ()
{
}
static void
d ()
{
if (b ())
c = 3;
}
void
e ()
{
d ();
a && ({ setjmp (); });
a && ({ setjmp (); });
a && ({ setjmp (); });
}
$ gcc-4.8 -c z1.c -O2
$ gcc-8-20180318 -c z1.c -O1
$
$ gcc-8-20180318 -c z1.c -O2
during GIMPLE pass: pre
z1.c: In function 'e':
z1.c:15:1: internal compiler error: in replace_block_by, at
tree-ssa-tail-merge.c:1546
e ()
^
0xc90c30 replace_block_by
../../gcc/tree-ssa-tail-merge.c:1546
0xc90c30 apply_clusters
../../gcc/tree-ss a-tail-merge.c:1637
0xc90c30 tail_merge_optimize(unsigned int)
../../gcc/tree-ssa-tail-merge.c:1755
0xc40997 execute
../../gcc/tree-ssa-pre.c:4209
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Subject: [Bug fortran/84957] New: [8 Regression] ICE in gfc_sym_type, at fortran/trans-types.c:2255
Date: Mon, 19 Mar 2018 18:36:00 -0000
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Bug ID: 84957
Summary: [8 Regression] ICE in gfc_sym_type, at
fortran/trans-types.c:2255
Product: gcc
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Changed between 20171119 and 20171126 :
$ cat z1.f90
function f() result(u)
entry g() result(v)
contains
function v(x) result(z)
character :: x(2)
character(sum(len_trim(x))) :: z
end
end
$ cat z2.f90
function f() result(u)
entry g() result(v)
contains
function u(x) result(z)
character :: x(2)
character(sum(len_trim(x))) :: z
end
end
$ gfortran-8-20171119 -c z1.f90
$
$ gfortran-8-20180318 -c z1.f90
z1.f90:2:0:
entry g() result(v)
internal compiler error: Segmentation fault
0xb9bd5f crash_signal
../../gcc/toplev.c:325
0x7c348b gfc_sym_type(gfc_symbol*)
../../gcc/fortran/trans-types.c:2255
0x7c18e3 gfc_get_function_type(gfc_symbol*)
../../gcc/fortran/trans-types.c:3031
0x766a9f build_function_decl
../../gcc/fortran/trans-decl.c:2233
0x768561 build_entry_thunks
../../gcc/fortran/trans-decl.c:2739
0x768561 gfc_create_function_decl(gfc_namespace*, bool)
../../gcc/fortran/trans-decl.c:2913
0x77284b gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6398
0x7009c0 translate_all_program_units
../../gcc/fortran/parse.c:6121
0x7009c0 gfc_parse_file()
../../gcc/fortran/parse.c:6324
0x74755f gfc_be_parse_file
../../gcc/fortran/f95-lang.c:204
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Subject: [Bug fortran/65453] ICE in build_function_decl, at fortran/trans-decl.c:2001
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--- Comment #4 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Mar 19 18:36:29 2018
New Revision: 258652
URL: https://gcc.gnu.org/viewcvs?rev=258652&root=gcc&view=rev
Log:
2018-03-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/65453
* decl.c (get_proc_name): Catch clash between a procedure statement
and a contained subprogram
2018-03-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/65453
* gfortran.dg/pr65453.f90: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr65453.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/decl.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/84958] New: int loads not eliminated against larger stores
Date: Mon, 19 Mar 2018 18:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84958
Bug ID: 84958
Summary: int loads not eliminated against larger stores
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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[ As discussed here: https://gcc.gnu.org/ml/gcc-patches/2018-03/msg00800.html ]
This test-case:
...
int foo()
{
int a[10];
for(int i = 0; i < 10; ++i)
a[i] = i*i;
int res = 0;
for(int i = 0; i < 10; ++i)
res += a[i];
return res;
}
...
compiled with -O3 results in this gimple at optimized:
...
MEM[(int *)&a] = { 0, 1 };
MEM[(int *)&a + 8B] = { 4, 9 };
MEM[(int *)&a + 16B] = { 16, 25 };
MEM[(int *)&a + 24B] = { 36, 49 };
MEM[(int *)&a + 32B] = { 64, 81 };
_6 = a[0];
_28 = a[1];
res_29 = _6 + _28;
_35 = a[2];
res_36 = res_29 + _35;
_42 = a[3];
res_43 = res_36 + _42;
_49 = a[4];
res_50 = res_43 + _49;
_56 = a[5];
res_57 = res_50 + _56;
_63 = a[6];
res_64 = res_57 + _63;
_70 = a[7];
res_71 = res_64 + _70;
_77 = a[8];
res_78 = res_71 + _77;
_2 = a[9];
res_11 = _2 + res_78;
a ={v} {CLOBBER};
return res_11;
...
Loop vectorization has no effect, and the scalar loops are completely unrolled.
Then slp vectorization vectorizes the stores.
When disabling slp vectorization, we have instead:
...
return 285;
...
[ FWIW, adding an extra fre pass here also results in optimal gimple:
...
diff --git a/gcc/passes.def b/gcc/passes.def
index 3ebcfc30349..6b64f600c4a 100644
--- a/gcc/passes.def
+++ b/gcc/passes.def
@@ -325,6 +325,7 @@ along with GCC; see the file COPYING3. If not see
NEXT_PASS (pass_tracer);
NEXT_PASS (pass_thread_jumps);
NEXT_PASS (pass_dominator, false /* may_peel_loop_headers_p */);
+ NEXT_PASS (pass_fre);
NEXT_PASS (pass_strlen);
NEXT_PASS (pass_thread_jumps);
NEXT_PASS (pass_vrp, false /* warn_array_bounds_p */);
...
]
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Subject: [Bug target/81647] inconsistent LTGT behavior at different optimization levels on AArch64.
Date: Mon, 19 Mar 2018 18:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81647
--- Comment #9 from sudi at gcc dot gnu.org ---
Author: sudi
Date: Mon Mar 19 18:50:32 2018
New Revision: 258653
URL: https://gcc.gnu.org/viewcvs?rev=258653&root=gcc&view=rev
Log:
[PR81647][AARCH64] Fix handling of Unordered Comparisons in aarch64-simd.md
This patch fixes the inconsistent behavior observed at -O3 for the unordered
comparisons. According to the online docs (https://gcc.gnu.org/onlinedocs
/gcc-7.2.0/gccint/Unary-and-Binary-Expressions.html), all of the following
should not raise an FP exception:
- UNGE_EXPR
- UNGT_EXPR
- UNLE_EXPR
- UNLT_EXPR
- UNEQ_EXPR
Also ORDERED_EXPR and UNORDERED_EXPR should only return zero or one.
The aarch64-simd.md handling of these were generating exception raising
instructions such as fcmgt. This patch changes the instructions that are
emitted in order to not give out the exceptions. We first check each
operand for NaNs and force any elements containing NaN to zero before using
them in the compare.
Example: UN<cc> (a, b) -> UNORDERED (a, b)
| (cm<cc> (isnan (a) ? 0.0 : a, isnan (b) ? 0.0 : b))
The ORDERED_EXPR is now handled as (cmeq (a, a) & cmeq (b, b)) and
UNORDERED_EXPR as ~ORDERED_EXPR and UNEQ as (~ORDERED_EXPR | cmeq (a,b)).
ChangeLog Entries:
*** gcc/ChangeLog ***
2018-03-19 Sudakshina Das <sudi.das@arm.com>
PR target/81647
* config/aarch64/aarch64-simd.md (vec_cmp<mode><v_int_equiv>): Modify
instructions for UNLT, UNLE, UNGT, UNGE, UNEQ, UNORDERED and ORDERED.
*** gcc/testsuite/ChangeLog ***
2018-03-19 Sudakshina Das <sudi.das@arm.com>
PR target/81647
* gcc.target/aarch64/pr81647.c: New.
Added:
trunk/gcc/testsuite/gcc.target/aarch64/pr81647.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64-simd.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/77414] ICE in create_function_arglist, at fortran/trans-decl.c:2410
Date: Mon, 19 Mar 2018 18:55:00 -0000
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--- Comment #8 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Mar 19 18:54:29 2018
New Revision: 258654
URL: https://gcc.gnu.org/viewcvs?rev=258654&root=gcc&view=rev
Log:
2018-03-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/77414
* decl.c (get_proc_name): Check for a subroutine re-defined in
the contain portion of a subroutine. Change language of existing
error message to better describe the issue. While here fix whitespace
issues.
2018-03-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/77414
* gfortran.dg/pr77414.f90: New test.
* gfortran.dg/internal_references_1.f90: Adjust error message.
Added:
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/pr77414.f90
Modified:
branches/gcc-7-branch/gcc/fortran/ChangeLog
branches/gcc-7-branch/gcc/fortran/decl.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gfortran.dg/internal_references_1.f90
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Subject: [Bug c++/84835] [8 Regression] ICE in add_method, at cp/class.c:996
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Nathan Sidwell <nathan at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Fixed r258655.
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Subject: [Bug c/84953] [6/7/8 Regression] misleading warning from strpbrk(x,"")
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I disagree, it is a well documented behavior and user gets exactly what he
asked for. There is no questionable or problematic behavior with those
options. It is not any different from strchr ("abcd", 'e') and many other
functions that can be determined at compile time to return NULL.
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Subject: [Bug c++/84835] [8 Regression] ICE in add_method, at cp/class.c:996
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84835
--- Comment #4 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
Author: nathan
Date: Mon Mar 19 18:56:22 2018
New Revision: 258655
URL: https://gcc.gnu.org/viewcvs?rev=258655&root=gcc&view=rev
Log:
[PR c++/84835] ICE with generic lambda in extern "C"
https://gcc.gnu.org/ml/gcc-patches/2018-03/msg00890.html
PR c++/84835
* lambda.c (maybe_add_lambda_conv_op): Force C++ linkage.
* pt.c (build_template_decl): Propagate language linkage.
PR c++/84835
* g++.dg/cpp1y/pr84835.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/pr84835.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/lambda.c
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
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From: "jason.vas.dias at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/84908] retpoline weirdness: 7.3.0-1 and 4.8.5-16: with -fPIC: R_X86_64_PC32 against undefined symbol `__x86_indirect_thunk_rax'
Date: Mon, 19 Mar 2018 18:59:00 -0000
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--- Comment #8 from Jason Vas Dias <jason.vas.dias at gmail dot com> ---
Thanks for the clarification, and I hope the kernel
developers stop compiling the mainline vDSO with
-mindirect-branch=thunk-extern -mindirect-branch-register
.
But there are still a few things I am trying to figure out :
o Why is the thunk entry reference & relocation inserted
for 6 switch clauses and not for 5 ?
o So do I understand correctly:
__x86_indirect_thunk_rax
is resolved and jumped to save %rax , jump to the address in %rcx,
and then restore %rax, and return ?
it is normally
A) generated for libraries / executable as required or
B) is in libgcc ?
If (A), then what triggers it and why is it not being generated for the
vDSO?
If (B), then where is the code in libgcc ? I can't find it.
I'd also like more details on why it is wrong to compile the vDSO with these
flags - it does work, and yes causes compilation problems like this one which
can be worked around by declaring all 'notrace static inline' entry points
in vclock_gettime.c to have the function attributes:
static inline
__attribute__((
indirect_branch("keep"),
function_return("keep")
))
int do_monotonic_raw( int clock, struct timespec *ts );
which effectively disables the effect of
-mindirect-branch=thunk-extern -mindirect-branch-register
for these functions ; also __vdso_clock_gettime itself MUST
be then declared:
__attribute__((
indirect_branch("keep"),
function_return("keep")
))
int __vdso_clock_gettime ( ... ) { ...
But does it cause any other issues ?
I did investigate changing the switch in __vdso_clock_gettime
to :
#define _GTOD_LABEL_PREFIX_ _vcg_
#define _SYMCAT_(_S1_,_S2_) _S1_##_S2_
#define _GTOD_CLK_LABEL_(_CLK_) _SYMCAT_(_GTOD_LABEL_PREFIX_,_CLK_)
notrace int __vdso_clock_gettime(clockid_t clock, struct timespec *ts)
{
static const void * clk_jmp_tbl[ MAX_CLOCKS ] = {
[ CLOCK_REALTIME ] =
&&_GTOD_CLK_LABEL_(CLOCK_REALTIME) ,
[ CLOCK_MONOTONIC ] =
&&_GTOD_CLK_LABEL_(CLOCK_MONOTONIC) ,
[ CLOCK_PROCESS_CPUTIME_ID ] = &&fallback ,
[ CLOCK_THREAD_CPUTIME_ID ] = &&fallback ,
[ CLOCK_MONOTONIC_RAW ] =
&&_GTOD_CLK_LABEL_(CLOCK_MONOTONIC_RAW) ,
[ CLOCK_REALTIME_COARSE ] =
&&_GTOD_CLK_LABEL_(CLOCK_REALTIME_COARSE) ,
[ CLOCK_MONOTONIC_COARSE ] =
&&_GTOD_CLK_LABEL_(CLOCK_MONOTONIC_COARSE) ,
[ CLOCK_BOOTTIME ] = &&fallback ,
[ CLOCK_BOOTTIME_ALARM ] = &&fallback ,
[ CLOCK_SGI_CYCLE ] = &&fallback ,
[ CLOCK_TAI ] = &&fallback , // unused clocks
[ 12 ] = &¬_supported ,
[ 13 ] = &¬_supported ,
[ 14 ] = &¬_supported ,
[ 15 ] = &¬_supported
};
goto *clk_jmp_tbl [ clock & 0xf ] ;
_GTOD_CLK_LABEL_(CLOCK_REALTIME) :
if (do_realtime(ts) == VCLOCK_NONE)
goto fallback;
goto return_ok;
_GTOD_CLK_LABEL_(CLOCK_MONOTONIC) :
if (do_monotonic(ts) == VCLOCK_NONE)
goto fallback;
goto return_ok;
_GTOD_CLK_LABEL_(CLOCK_MONOTONIC_RAW) :
if (do_monotonic_raw(ts) == VCLOCK_NONE)
goto fallback;
goto return_ok;
_GTOD_CLK_LABEL_(CLOCK_REALTIME_COARSE) :
do_realtime_coarse(ts);
goto return_ok;
_GTOD_CLK_LABEL_(CLOCK_MONOTONIC_COARSE):
do_monotonic_coarse(ts);
goto return_ok;
return_ok:
return 0;
not_supported:
return -1;
fallback:
return vdso_fallback_gettime(clock, ts);
}
Results in 16 dynamic relocations,
shown in objdump -R arch/x86/entry/vdso/vdso64.so.dbg output:
DYNAMIC RELOCATION RECORDS
OFFSET TYPE VALUE
00000000000004a0 R_X86_64_RELATIVE *ABS*+0x0000000000000c49
...
000000000000518 R_X86_64_RELATIVE *ABS*+0x0000000000000b31
what's the problem with dyn relocs ?
I can't understand why GCC decides to generate relocations
here - it knows all the information before hand - why
can't it insert code to compute
( ( LOAD_ADDRESS_OF(__vdso_clock_gettime) == %pc at entry) + label_offset )
and populate the clk_jmp_table in an initializer in the
above version of the function rather than generate
relocations ?
Thanks & Best Regards,
Jason
>From gcc-bugs-return-598257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 19:14:44 2018
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Subject: [Bug fortran/65453] ICE in build_function_decl, at fortran/trans-decl.c:2001
Date: Mon, 19 Mar 2018 19:14:00 -0000
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--- Comment #5 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Mon Mar 19 19:14:06 2018
New Revision: 258657
URL: https://gcc.gnu.org/viewcvs?rev=258657&root=gcc&view=rev
Log:
2018-03-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/65453
* decl.c (get_proc_name): Catch clash between a procedure statement
and a contained subprogram
2018-03-19 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/65453
* gfortran.dg/pr65453.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/pr65453.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/decl.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/84958] int loads not eliminated against larger stores
Date: Mon, 19 Mar 2018 19:14:00 -0000
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-cvs/2018-03/msg00566.html :
Author: vries
Date: Mon Mar 19 19:12:53 2018
New Revision: 258656
URL: https://gcc.gnu.org/viewcvs?rev=258656&root=gcc&view=rev
Log:
[testsuite] Add nvptx xfail to pr84512.c
2018-03-19 Tom de Vries <tom@codesourcery.com>
* gcc.dg/tree-ssa/pr84512.c: Don't require effective target
vect_int_mult. Add nvptx xfail for PR84958.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr84512.c
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Subject: [Bug fortran/65453] ICE in build_function_decl, at fortran/trans-decl.c:2001
Date: Mon, 19 Mar 2018 19:16:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |6.5
--- Comment #6 from kargl at gcc dot gnu.org ---
Fixed on 6-branch, 7-branch, and trunk.
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Subject: [Bug fortran/77414] ICE in create_function_arglist, at fortran/trans-decl.c:2410
Date: Mon, 19 Mar 2018 19:18:00 -0000
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #9 from kargl at gcc dot gnu.org ---
Fixed on 7-branch and trunk. Thanks for bug report.
Patch does not apply cleanly to 6-branch.
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Subject: [Bug c/84953] [6/7/8 Regression] misleading warning from strpbrk(x,"")
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--- Comment #7 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Well, okay then...
Thanks!
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From: "vegard.nossum at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84959] New: internal compiler error: in store_binding, at cp/name-lookup.c:6549 (store_binding()/store_class_binding())
Date: Mon, 19 Mar 2018 19:28:00 -0000
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Bug ID: 84959
Summary: internal compiler error: in store_binding, at
cp/name-lookup.c:6549
(store_binding()/store_class_binding())
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at oracle dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
class {
void a() {
struct {
virtual void b();
union b
}
}
char b;
};
Output:
$ cc1plus
void<unnamed class>::a()
<stdin>:6:5: error: expected unqualified-id before '}' token
<stdin>:3:12: internal compiler error: in store_binding, at
cp/name-lookup.c:6549
0xe2f887 store_binding
/home/vegard/git/gcc/gcc/cp/name-lookup.c:6549
0xe2f887 store_class_bindings
/home/vegard/git/gcc/gcc/cp/name-lookup.c:6611
0xe30189 do_push_to_top_level
/home/vegard/git/gcc/gcc/cp/name-lookup.c:6657
0xe4cec0 do_push_nested_namespace
/home/vegard/git/gcc/gcc/cp/name-lookup.c:6751
0xe4d654 push_nested_namespace(tree_node*)
/home/vegard/git/gcc/gcc/cp/name-lookup.c:7037
0x120b92f push_abi_namespace
/home/vegard/git/gcc/gcc/cp/rtti.c:149
0x120b92f get_tinfo_desc
/home/vegard/git/gcc/gcc/cp/rtti.c:1449
0x120b552 get_tinfo_desc
/home/vegard/git/gcc/gcc/cp/rtti.c:1330
0x121092e get_tinfo_decl(tree_node*)
/home/vegard/git/gcc/gcc/cp/rtti.c:452
0x9ac8bf build_rtti_vtbl_entries
/home/vegard/git/gcc/gcc/cp/class.c:9636
0x9ac8bf build_vtbl_initializer
/home/vegard/git/gcc/gcc/cp/class.c:9151
0x9ac8bf dfs_accumulate_vtbl_inits
/home/vegard/git/gcc/gcc/cp/class.c:9075
0x9ac8bf accumulate_vtbl_inits
/home/vegard/git/gcc/gcc/cp/class.c:8978
0x9e45a1 finish_vtbls
/home/vegard/git/gcc/gcc/cp/class.c:8609
0x9e45a1 finish_struct_1(tree_node*)
/home/vegard/git/gcc/gcc/cp/class.c:6905
0x9ebe54 finish_struct(tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/cp/class.c:7065
0xf144c3 cp_parser_class_specifier_1
/home/vegard/git/gcc/gcc/cp/parser.c:22524
0xf231cb cp_parser_class_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:22768
0xf231cb cp_parser_type_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:16774
0xf8858a cp_parser_decl_specifier_seq
/home/vegard/git/gcc/gcc/cp/parser.c:13629
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
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Subject: [Bug c++/84960] New: internal compiler error: verify_flow_info failed
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84960
Bug ID: 84960
Summary: internal compiler error: verify_flow_info failed
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at oracle dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
int a;
float b;
void c() {
long d;
e:
if ((b - (a %= 0) < 1) * -1)
;
else {
decltype(d) f(a);
__builtin_unreachable();
__builtin_prefetch(&&e);
}
goto *a;
}
Output:
$ cc1plus -O2 -fno-strict-overflow
void c()
<stdin>:6:15: warning: division by zero [-Wdiv-by-zero]
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<targetclone> <free-fnsummary> <whole-program> <profile_estimate> <icf>
<devirt> <cp> <fnsummary> <inline> <pure-const> <free-fnsummary> <static-var>
<single-use> <comdats>Assembling functions:
<materialize-all-clones> <simdclone> void c()
<stdin>: In function 'void c()':
<stdin>:3:6: error: ENTRY_BLOCK has IL associated with it
during GIMPLE pass: isolate-paths
<stdin>:3:6: internal compiler error: verify_flow_info failed
0x185ac87 verify_flow_info()
/home/vegard/git/gcc/gcc/cfghooks.c:265
0x331048c checking_verify_flow_info
/home/vegard/git/gcc/gcc/cfghooks.h:198
0x331048c cleanup_tree_cfg_noloop
/home/vegard/git/gcc/gcc/tree-cfgcleanup.c:920
0x331048c cleanup_tree_cfg()
/home/vegard/git/gcc/gcc/tree-cfgcleanup.c:971
0x2b66e84 execute_function_todo
/home/vegard/git/gcc/gcc/passes.c:1947
0x2b700f6 do_per_function
/home/vegard/git/gcc/gcc/passes.c:1659
0x2b700f6 execute_todo
/home/vegard/git/gcc/gcc/passes.c:2048
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
>From gcc-bugs-return-598263-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 19:32:24 2018
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From: "vegard.nossum at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84961] New: internal compiler error: verify_ssa failed
Date: Mon, 19 Mar 2018 19:32:00 -0000
X-Bugzilla-Reason: CC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84961
Bug ID: 84961
Summary: internal compiler error: verify_ssa failed
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at oracle dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
short a;
volatile double b;
void c() { asm("" : "=a"(b = a)); }
Output:
$ cc1plus
void c()
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes>
<stdin>:3:35: error: SSA_NAME_DEF_STMT is wrong
Expected definition statement:
__asm__("" : "=a" _3);
Actual definition statement:
_3 = _2;
during GIMPLE pass: ssa
<stdin>:3:35: internal compiler error: verify_ssa failed
0x3d61773 verify_ssa(bool, bool)
/home/vegard/git/gcc/gcc/tree-ssa.c:1188
0x2b674cd execute_function_todo
/home/vegard/git/gcc/gcc/passes.c:2001
0x2b700f6 do_per_function
/home/vegard/git/gcc/gcc/passes.c:1659
0x2b700f6 execute_todo
/home/vegard/git/gcc/gcc/passes.c:2048
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
>From gcc-bugs-return-598264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 19:35:51 2018
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From: "vegard.nossum at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84962] New: internal compiler error: in get_fns, at cp/tree.c:2505
Date: Mon, 19 Mar 2018 19:35:00 -0000
X-Bugzilla-Reason: CC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84962
Bug ID: 84962
Summary: internal compiler error: in get_fns, at cp/tree.c:2505
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at oracle dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
struct {
struct {
template <typename> void a();
}; : a
}
Output:
$ cc1plus
<stdin>:4:17: internal compiler error: in get_fns, at cp/tree.c:2505
0x130ac07 get_fns(tree_node*)
/home/vegard/git/gcc/gcc/cp/tree.c:2504
0x130adf0 get_first_fn(tree_node*)
/home/vegard/git/gcc/gcc/cp/tree.c:2514
0x12ae65f finish_id_expression(tree_node*, tree_node*, tree_node*, cp_id_kind*,
bool, bool, bool*, bool, bool, bool, bool, char const**, unsigned int)
/home/vegard/git/gcc/gcc/cp/semantics.c:3731
0xf33f42 cp_parser_primary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:5611
0xf7698b cp_parser_postfix_expression
/home/vegard/git/gcc/gcc/cp/parser.c:7030
0xf2a4b7 cp_parser_unary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:8322
0xebfeca cp_parser_cast_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9090
0xec24f6 cp_parser_binary_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9191
0xecbd14 cp_parser_constant_expression
/home/vegard/git/gcc/gcc/cp/parser.c:9762
0xfdec8d cp_parser_member_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:23684
0xf142ab cp_parser_member_specification_opt
/home/vegard/git/gcc/gcc/cp/parser.c:23374
0xf142ab cp_parser_class_specifier_1
/home/vegard/git/gcc/gcc/cp/parser.c:22516
0xf231cb cp_parser_class_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:22768
0xf231cb cp_parser_type_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:16774
0xf8858a cp_parser_decl_specifier_seq
/home/vegard/git/gcc/gcc/cp/parser.c:13629
0xfa3a70 cp_parser_simple_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:12938
0xfab998 cp_parser_block_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:12883
0xffead5 cp_parser_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:12780
0xff5b8b cp_parser_declaration_seq_opt
/home/vegard/git/gcc/gcc/cp/parser.c:12656
0xff71b3 cp_parser_translation_unit
/home/vegard/git/gcc/gcc/cp/parser.c:4561
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
>From gcc-bugs-return-598265-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 19:42:43 2018
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From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/84963] New: [8 Regression] ICE in get_constraint_for_ssa_var, at tree-ssa-structalias.c:2955
Date: Mon, 19 Mar 2018 19:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84963
Bug ID: 84963
Summary: [8 Regression] ICE in get_constraint_for_ssa_var, at
tree-ssa-structalias.c:2955
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gscfq@t-online.de
Target Milestone: ---
Changed between 20180311 and 20180318, reappearance of pr70856 :
$ cat z1.f90
program p
print *, sin([1.0, 2.0])
print *, cos([1.0, 2.0])
end
$ gfortran-8-20180311 -c z1.f90 -fopenacc -O2
$ gfortran-8-20180318 -c z1.f90 -fopenacc -O1
$
$ gfortran-8-20180318 -c z1.f90 -fopenacc -O2
during IPA pass: pta
z1.f90:4:0:
end
internal compiler error: in get_constraint_for_ssa_var, at
tree-ssa-structalias.c:2955
0xd2f3b0 get_constraint_for_ssa_var
../../gcc/tree-ssa-structalias.c:2952
0xd2f4de get_constraint_for_1
../../gcc/tree-ssa-structalias.c:3559
0xd2f5c9 get_constraint_for_component_ref
../../gcc/tree-ssa-structalias.c:3237
0xd2f5c9 get_constraint_for_1
../../gcc/tree-ssa-structalias.c:3514
0xd31bf7 find_func_aliases
../../gcc/tree-ssa-structalias.c:4911
0xd392e1 ipa_pta_execute
../../gcc/tree-ssa-structalias.c:7988
>From gcc-bugs-return-598267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Mar 19 19:43:55 2018
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From: "vegard.nossum at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/84964] New: internal compiler error: in expand_call, at calls.c:4540
Date: Mon, 19 Mar 2018 19:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84964
Bug ID: 84964
Summary: internal compiler error: in expand_call, at
calls.c:4540
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at oracle dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
struct a {
short b : -1ULL;
};
void c(...) { c(a()); }
Output:
$ cc1plus
<stdin>:2:14: warning: width of 'a::b' exceeds its type
void c(...)
Analyzing compilation unit
Performing interprocedural optimizations
<*free_lang_data> <visibility> <build_ssa_passes> <opt_local_passes>
<targetclone> <free-fnsummary> <whole-program> <fnsummary> <inline>
<free-fnsummary> <single-use> <comdats>Assembling functions:
<materialize-all-clones> <simdclone> void c(...)
<stdin>: In function 'void c(...)':
<stdin>:4:16: sorry, unimplemented: passing too large argument on stack
during RTL pass: expand
<stdin>:4:16: internal compiler error: in expand_call, at calls.c:4540
0x17b719f expand_call(tree_node*, rtx_def*, int)
/home/vegard/git/gcc/gcc/calls.c:4537
0x1e78955 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/home/vegard/git/gcc/gcc/expr.c:11002
0x181e6d4 expand_expr
/home/vegard/git/gcc/gcc/expr.h:276
0x181e6d4 expand_call_stmt
/home/vegard/git/gcc/gcc/cfgexpand.c:2690
0x181e6d4 expand_gimple_stmt_1
/home/vegard/git/gcc/gcc/cfgexpand.c:3624
0x181e6d4 expand_gimple_stmt
/home/vegard/git/gcc/gcc/cfgexpand.c:3790
0x1824c48 expand_gimple_basic_block
/home/vegard/git/gcc/gcc/cfgexpand.c:5819
0x18443d7 execute
/home/vegard/git/gcc/gcc/cfgexpand.c:6425
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
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Reply-To: amcgitirana@gmail.com
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Date: Mon, 19 Mar 2018 19:43:00 -0000
Subject: [Bug Duplication Problem] Survey Invite
From: amcgitirana@gmail.com
To: gcc-bugs@gcc.gnu.org
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I've invited you to fill out the following form:
Professional Profile
To fill it out, visit:
https://docs.google.com/forms/d/e/1FAIpQLSfQTZkrylE1t49gjzewPQSPWHFnPtGCZfRujg_G8VTwqGrbHg/viewform?c=0&w=1&usp=mail_form_link
Dear friend,
I am a master's student in Computer Science at the Federal University
of Bahia, Salvador, Brazil, under the advising of Dr. Eduardo Almeida.
We chose you because you participated in one of the open source projects
included in this study. All the information provided will be kept
confidential. We have no intention to judge your work since we are merely
interested in learning about some aspects of your work.
We are investigating the bug report duplication problem, so based on your
experience using bug-trackers, we would like to invite you to participate
in a short 8-10 minute survey that our research group is conducting to get
opinion about this subject.
Please, return it until February 31st, 2018. We will offer a lottery ticket
to compete for an Amazon $100 credit and the results of the study when we
finished the analysis.
We appreciate your time!
Best Regards,
Alexandre Gitirana
Google Forms: Create and analyze surveys.
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2018-03-18 0:43 ` [Bug libstdc++/84928] std::accumulate should move the accumulator argument redi at gcc dot gnu.org
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