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* [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
@ 2015-07-09 9:47 simon at sconseil dot fr
2015-07-09 9:48 ` [Bug libgomp/66820] " simon at sconseil dot fr
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: simon at sconseil dot fr @ 2015-07-09 9:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
Bug ID: 66820
Summary: internal compiler error: in get_expr_operands, at
tree-ssa-operands.c:910
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: simon at sconseil dot fr
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Created attachment 35938
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35938&action=edit
Code to reproduce the bug
Hi,
I get this error when compiling a C code using OpenMP, since the upgrade to GCC
5.1, it was compiling without error with GCC 4.9. I'm using Archlinux.
The attached merging.c file is the C code where I removed everything I could to
get a minimal code to reproduce the bug. If I remove the strcat call in the omp
parallel block (and replace it with the commented sprintf) then it compiles.
The C code is wrapped in a python module, below is the compilation log:
$ LANG=C python setup.py build_ext -i
running build_ext
building 'libCmethods' extension
gcc -pthread -fno-strict-aliasing -march=x86-64 -mtune=generic -O2 -pipe
-fstack-protector-strong --param=ssp-buffer-size=4 -DNDEBUG -march=x86-64
-mtune=generic -O2 -pipe -fstack-protector-strong --param=ssp-buffer-size=4
-fPIC -I/usr/include/python2.7 -c src/tools.c -o
build/temp.linux-x86_64-2.7/src/tools.o -freport-bug -fopenmp
gcc -pthread -fno-strict-aliasing -march=x86-64 -mtune=generic -O2 -pipe
-fstack-protector-strong --param=ssp-buffer-size=4 -DNDEBUG -march=x86-64
-mtune=generic -O2 -pipe -fstack-protector-strong --param=ssp-buffer-size=4
-fPIC -I/usr/include/python2.7 -c src/subtract_slice_median.c -o
build/temp.linux-x86_64-2.7/src/subtract_slice_median.o -freport-bug -fopenmp
gcc -pthread -fno-strict-aliasing -march=x86-64 -mtune=generic -O2 -pipe
-fstack-protector-strong --param=ssp-buffer-size=4 -DNDEBUG -march=x86-64
-mtune=generic -O2 -pipe -fstack-protector-strong --param=ssp-buffer-size=4
-fPIC -I/usr/include/python2.7 -c src/merging.c -o
build/temp.linux-x86_64-2.7/src/merging.o -freport-bug -fopenmp
src/merging.c: In function 'mpdaf_merging_median._omp_fn.0':
src/merging.c:36:1: internal compiler error: in get_expr_operands, at
tree-ssa-operands.c:910
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
Preprocessed source stored into /tmp/simon/ccsj0rjP.out file, please attach
this to your bugreport.
error: command 'gcc' failed with exit status 1
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug libgomp/66820] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
@ 2015-07-09 9:48 ` simon at sconseil dot fr
2015-07-09 10:04 ` [Bug libgomp/66820] [5/6 Regression] " mpolacek at gcc dot gnu.org
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: simon at sconseil dot fr @ 2015-07-09 9:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
--- Comment #1 from Simon Conseil <simon at sconseil dot fr> ---
Created attachment 35939
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35939&action=edit
Preprocessed source from -freport-bug
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug libgomp/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
2015-07-09 9:48 ` [Bug libgomp/66820] " simon at sconseil dot fr
@ 2015-07-09 10:04 ` mpolacek at gcc dot gnu.org
2015-07-09 10:16 ` [Bug middle-end/66820] " jakub at gcc dot gnu.org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2015-07-09 10:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-07-09
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |5.3
Summary|internal compiler error: in |[5/6 Regression] internal
|get_expr_operands, at |compiler error: in
|tree-ssa-operands.c:910 |get_expr_operands, at
| |tree-ssa-operands.c:910
Ever confirmed|0 |1
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. With checking:
$ ./cc1 -quiet ccsj0rjP.out.i -fopenmp
src/merging.c: In function ‘mpdaf_merging_median’:
src/merging.c:35:12: error: non-register as LHS of binary operation
<<< error >>> = &filename + D.2786;
src/merging.c:35:12: error: invalid argument to gimple call
<<< error >>>
__builtin_memcpy (<<< error >>>, "[data]", 7);
src/merging.c:35:12: internal compiler error: verify_gimple failed
0xf63acd verify_gimple_in_seq(gimple_statement_base*)
/home/marek/src/gcc/gcc/tree-cfg.c:4804
0xe1afd4 execute_function_todo
/home/marek/src/gcc/gcc/passes.c:1949
0xe1a0ac do_per_function
/home/marek/src/gcc/gcc/passes.c:1638
0xe1b19f execute_todo
/home/marek/src/gcc/gcc/passes.c:2004
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
Date: Thu, 09 Jul 2015 10:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idf820
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r213753.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/66820] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
2015-07-09 9:48 ` [Bug libgomp/66820] " simon at sconseil dot fr
2015-07-09 10:04 ` [Bug libgomp/66820] [5/6 Regression] " mpolacek at gcc dot gnu.org
@ 2015-07-09 10:16 ` jakub at gcc dot gnu.org
2015-07-09 10:21 ` [Bug middle-end/66820] [5/6 Regression] " mpolacek at gcc dot gnu.org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-07-09 10:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openmp
Last reconfirmed|2015-07-09 00:00:00 |
Component|libgomp |middle-end
Target Milestone|5.3 |5.2
Summary|[5/6 Regression] internal |internal compiler error: in
|compiler error: in |get_expr_operands, at
|get_expr_operands, at |tree-ssa-operands.c:910
|tree-ssa-operands.c:910 |
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r213753, though more likely OpenMP lowering or expansion bug
somewhere, not handling addressable variables properly.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
` (2 preceding siblings ...)
2015-07-09 10:16 ` [Bug middle-end/66820] " jakub at gcc dot gnu.org
@ 2015-07-09 10:21 ` mpolacek at gcc dot gnu.org
2015-07-09 14:34 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2015-07-09 10:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I guess related to PR66633.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
` (3 preceding siblings ...)
2015-07-09 10:21 ` [Bug middle-end/66820] [5/6 Regression] " mpolacek at gcc dot gnu.org
@ 2015-07-09 14:34 ` jakub at gcc dot gnu.org
2015-07-09 15:14 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-07-09 14:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, the problem is that the fold_stmt folding added in that revision creates
new decls that it doesn't put into the current gimplification context vars, but
instead creates whole function temporaries.
So we have in *.gimple:
#pragma omp parallel num_threads(num_nthreads) shared(filenames)
{
char * D.2570;
long unsigned int D.2571;
{
char filename[508];
int i;
try
{
i = 0;
D.2570 = filenames[i];
strcpy (&filename, D.2570);
D.2571 = __builtin_strlen (&filename);
D.2572 = &filename + D.2571;
__builtin_memcpy (D.2572, "[data]", 7);
}
finally
{
filename = {CLOBBER};
}
}
where the D.2572 temporary has been created by fold_stmt, but it hasn't been
added into the parallel region (nor has private(D.2572) clause which would work
too).
Right now in gimplify.c maybe_fold_stmt has a hack to avoid folding anything
inside of ORT_TARGET regions, perhaps we should extend that also to
(ctx->region_type & (ORT_PARALLEL | ORT_TASK)) != 0 too (and adjust lower_omp
to fold_stmt accordingly even when taskreg_nesting_level is non-zero).
Or get rid of fold_stmt during gimplification altogether, though that is
supposedly not suitable for gcc 5 (and keep doing it only in forwprop and
later)?
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
` (4 preceding siblings ...)
2015-07-09 14:34 ` jakub at gcc dot gnu.org
@ 2015-07-09 15:14 ` jakub at gcc dot gnu.org
2015-07-10 10:26 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-07-09 15:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Note, this is unrelated to PR66633, that one even after the fix is a bug
somewhere in tree-nested.c.
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
` (5 preceding siblings ...)
2015-07-09 15:14 ` jakub at gcc dot gnu.org
@ 2015-07-10 10:26 ` jakub at gcc dot gnu.org
2015-07-10 14:14 ` jakub at gcc dot gnu.org
2015-07-10 14:15 ` jakub at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-07-10 10:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jul 10 10:26:19 2015
New Revision: 225661
URL: https://gcc.gnu.org/viewcvs?rev=225661&root=gcc&view=rev
Log:
PR middle-end/66820
* gimplify.c (maybe_fold_stmt): Don't fold in ORT_PARALLEL
or ORT_TASK contexts.
* omp-low.c (lower_omp): Call fold_stmt even if taskreg_nesting_level
is non-zero.
* gcc.dg/gomp/pr66820.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/gomp/pr66820.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimplify.c
trunk/gcc/omp-low.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
` (6 preceding siblings ...)
2015-07-10 10:26 ` jakub at gcc dot gnu.org
@ 2015-07-10 14:14 ` jakub at gcc dot gnu.org
2015-07-10 14:15 ` jakub at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-07-10 14:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jul 10 14:14:18 2015
New Revision: 225678
URL: https://gcc.gnu.org/viewcvs?rev=225678&root=gcc&view=rev
Log:
PR middle-end/66820
* gimplify.c (maybe_fold_stmt): Don't fold in ORT_PARALLEL
or ORT_TASK contexts.
* omp-low.c (lower_omp): Call fold_stmt even if taskreg_nesting_level
is non-zero.
* gcc.dg/gomp/pr66820.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.dg/gomp/pr66820.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/gimplify.c
branches/gcc-5-branch/gcc/omp-low.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/66820] [5/6 Regression] internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910
2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
` (7 preceding siblings ...)
2015-07-10 14:14 ` jakub at gcc dot gnu.org
@ 2015-07-10 14:15 ` jakub at gcc dot gnu.org
8 siblings, 0 replies; 10+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-07-10 14:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66820
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 10+ messages in thread
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2015-07-09 9:47 [Bug libgomp/66820] New: internal compiler error: in get_expr_operands, at tree-ssa-operands.c:910 simon at sconseil dot fr
2015-07-09 9:48 ` [Bug libgomp/66820] " simon at sconseil dot fr
2015-07-09 10:04 ` [Bug libgomp/66820] [5/6 Regression] " mpolacek at gcc dot gnu.org
2015-07-09 10:16 ` [Bug middle-end/66820] " jakub at gcc dot gnu.org
2015-07-09 10:21 ` [Bug middle-end/66820] [5/6 Regression] " mpolacek at gcc dot gnu.org
2015-07-09 14:34 ` jakub at gcc dot gnu.org
2015-07-09 15:14 ` jakub at gcc dot gnu.org
2015-07-10 10:26 ` jakub at gcc dot gnu.org
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