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* [Bug middle-end/101167] New: Miscompilation of task_reduction
@ 2021-06-22 17:41 jakub at gcc dot gnu.org
2021-06-22 17:41 ` [Bug middle-end/101167] " jakub at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-06-22 17:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101167
Bug ID: 101167
Summary: Miscompilation of task_reduction
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: jakub at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
struct S { int a, b, c[2]; };
void
init (struct S *x)
{
x->a = 0;
x->b = 0;
x->c[0] = 0;
x->c[1] = 0;
}
void
merge (struct S *x, struct S *y)
{
x->a += y->a;
x->b += y->b;
}
#pragma omp declare reduction (+: struct S : merge (&omp_out, &omp_in))
initializer (init (&omp_priv))
void
foo (struct S x)
{
#pragma omp taskgroup task_reduction (+: x)
{
#pragma omp task in_reduction (+: x)
{
x.a++;
x.b++;
}
#pragma omp task in_reduction (+: x)
{
x.a += 4;
x.b += 14;
}
#pragma omp task in_reduction (+: x)
{
x.a += 9;
x.b += 19;
}
}
if (x.a != 56 || x.b != 86)
__builtin_abort ();
}
int
main ()
{
struct S x = { 42, 52 };
#pragma omp parallel master
foo (x);
return 0;
}
is miscompiled, merge is called with the same argument twice instead of merging
from the task privatized variable(s) into the PARM_DECL.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/101167] Miscompilation of task_reduction
2021-06-22 17:41 [Bug middle-end/101167] New: Miscompilation of task_reduction jakub at gcc dot gnu.org
@ 2021-06-22 17:41 ` jakub at gcc dot gnu.org
2021-06-23 8:06 ` cvs-commit at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-06-22 17:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101167
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Keywords| |openmp, wrong-code
Last reconfirmed| |2021-06-22
Status|UNCONFIRMED |ASSIGNED
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/101167] Miscompilation of task_reduction
2021-06-22 17:41 [Bug middle-end/101167] New: Miscompilation of task_reduction jakub at gcc dot gnu.org
2021-06-22 17:41 ` [Bug middle-end/101167] " jakub at gcc dot gnu.org
@ 2021-06-23 8:06 ` cvs-commit at gcc dot gnu.org
2021-06-23 13:19 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-06-23 8:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101167
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:679506c3830ea1a93c755413609bfac3538e2cbd
commit r12-1740-g679506c3830ea1a93c755413609bfac3538e2cbd
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Jun 23 10:03:28 2021 +0200
openmp: Fix up *_reduction clause handling with UDRs on PARM_DECLs
[PR101167]
The following testcase FAILs, because the UDR combiner is invoked
incorrectly.
lower_omp_rec_clauses expects that when it sets
DECL_VALUE_EXPR/DECL_HAS_VALUE_EXPR_P
for both the placeholder and the var that everything will be properly
regimplified, but as the variable in question is a PARM_DECL rather than
VAR_DECL, lower_omp_regimplify_p doesn't say that it should be regimplified
and so it is not.
2021-06-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/101167
* omp-low.c (lower_omp_regimplify_p): Regimplify also PARM_DECLs
and RESULT_DECLs that have DECL_HAS_VALUE_EXPR_P set.
* testsuite/libgomp.c-c++-common/task-reduction-15.c: New test.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/101167] Miscompilation of task_reduction
2021-06-22 17:41 [Bug middle-end/101167] New: Miscompilation of task_reduction jakub at gcc dot gnu.org
2021-06-22 17:41 ` [Bug middle-end/101167] " jakub at gcc dot gnu.org
2021-06-23 8:06 ` cvs-commit at gcc dot gnu.org
@ 2021-06-23 13:19 ` cvs-commit at gcc dot gnu.org
2022-05-10 8:19 ` cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-06-23 13:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101167
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:f50a222dffb448ef5c69a64b6945acafc6b16e12
commit r11-8643-gf50a222dffb448ef5c69a64b6945acafc6b16e12
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Jun 23 10:03:28 2021 +0200
openmp: Fix up *_reduction clause handling with UDRs on PARM_DECLs
[PR101167]
The following testcase FAILs, because the UDR combiner is invoked
incorrectly.
lower_omp_rec_clauses expects that when it sets
DECL_VALUE_EXPR/DECL_HAS_VALUE_EXPR_P
for both the placeholder and the var that everything will be properly
regimplified, but as the variable in question is a PARM_DECL rather than
VAR_DECL, lower_omp_regimplify_p doesn't say that it should be regimplified
and so it is not.
2021-06-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/101167
* omp-low.c (lower_omp_regimplify_p): Regimplify also PARM_DECLs
and RESULT_DECLs that have DECL_HAS_VALUE_EXPR_P set.
* testsuite/libgomp.c-c++-common/task-reduction-15.c: New test.
(cherry picked from commit 679506c3830ea1a93c755413609bfac3538e2cbd)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/101167] Miscompilation of task_reduction
2021-06-22 17:41 [Bug middle-end/101167] New: Miscompilation of task_reduction jakub at gcc dot gnu.org
` (2 preceding siblings ...)
2021-06-23 13:19 ` cvs-commit at gcc dot gnu.org
@ 2022-05-10 8:19 ` cvs-commit at gcc dot gnu.org
2022-05-11 6:20 ` cvs-commit at gcc dot gnu.org
2022-05-11 6:36 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-10 8:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101167
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:6a2724b37766b612e5b7695ed39042a5e707c971
commit r10-10625-g6a2724b37766b612e5b7695ed39042a5e707c971
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Jun 23 10:03:28 2021 +0200
openmp: Fix up *_reduction clause handling with UDRs on PARM_DECLs
[PR101167]
The following testcase FAILs, because the UDR combiner is invoked
incorrectly.
lower_omp_rec_clauses expects that when it sets
DECL_VALUE_EXPR/DECL_HAS_VALUE_EXPR_P
for both the placeholder and the var that everything will be properly
regimplified, but as the variable in question is a PARM_DECL rather than
VAR_DECL, lower_omp_regimplify_p doesn't say that it should be regimplified
and so it is not.
2021-06-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/101167
* omp-low.c (lower_omp_regimplify_p): Regimplify also PARM_DECLs
and RESULT_DECLs that have DECL_HAS_VALUE_EXPR_P set.
* testsuite/libgomp.c-c++-common/task-reduction-15.c: New test.
(cherry picked from commit 679506c3830ea1a93c755413609bfac3538e2cbd)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/101167] Miscompilation of task_reduction
2021-06-22 17:41 [Bug middle-end/101167] New: Miscompilation of task_reduction jakub at gcc dot gnu.org
` (3 preceding siblings ...)
2022-05-10 8:19 ` cvs-commit at gcc dot gnu.org
@ 2022-05-11 6:20 ` cvs-commit at gcc dot gnu.org
2022-05-11 6:36 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-11 6:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101167
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:
https://gcc.gnu.org/g:7ce8cb98ef1b6a8de2918b963d225eeee52dae9c
commit r9-10082-g7ce8cb98ef1b6a8de2918b963d225eeee52dae9c
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Jun 23 10:03:28 2021 +0200
openmp: Fix up *_reduction clause handling with UDRs on PARM_DECLs
[PR101167]
The following testcase FAILs, because the UDR combiner is invoked
incorrectly.
lower_omp_rec_clauses expects that when it sets
DECL_VALUE_EXPR/DECL_HAS_VALUE_EXPR_P
for both the placeholder and the var that everything will be properly
regimplified, but as the variable in question is a PARM_DECL rather than
VAR_DECL, lower_omp_regimplify_p doesn't say that it should be regimplified
and so it is not.
2021-06-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/101167
* omp-low.c (lower_omp_regimplify_p): Regimplify also PARM_DECLs
and RESULT_DECLs that have DECL_HAS_VALUE_EXPR_P set.
* testsuite/libgomp.c-c++-common/task-reduction-15.c: New test.
(cherry picked from commit 679506c3830ea1a93c755413609bfac3538e2cbd)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/101167] Miscompilation of task_reduction
2021-06-22 17:41 [Bug middle-end/101167] New: Miscompilation of task_reduction jakub at gcc dot gnu.org
` (4 preceding siblings ...)
2022-05-11 6:20 ` cvs-commit at gcc dot gnu.org
@ 2022-05-11 6:36 ` jakub at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-05-11 6:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101167
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 7+ messages in thread
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2021-06-22 17:41 [Bug middle-end/101167] New: Miscompilation of task_reduction jakub at gcc dot gnu.org
2021-06-22 17:41 ` [Bug middle-end/101167] " jakub at gcc dot gnu.org
2021-06-23 8:06 ` cvs-commit at gcc dot gnu.org
2021-06-23 13:19 ` cvs-commit at gcc dot gnu.org
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