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re PR c/51360 (spurious unused-but-set-variable warning for var used in OpenMP pragma) 

PR c/51360
	* c-parser.c (c_parser_omp_clause_num_threads,
	c_parser_omp_clause_schedule): Call mark_exp_read.

	* semantics.c (finish_omp_clauses): For OMP_CLAUSE_NUM_THREADS_EXPR
	and OMP_CLAUSE_SCHEDULE_CHUNK_EXPR call mark_rvalue_use.

	* c-c++-common/gomp/pr51360.c: New test.
	* g++.dg/gomp/pr51360.C: New test.

From-SVN: r182381
This commit is contained in:
Jakub Jelinek 2011-12-15 18:29:25 +01:00 committed by Jakub Jelinek
parent 323492f6f9
commit 7d1362bcd6
7 changed files with 83 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-12-15 Jakub Jelinek <jakub@redhat.com>
PR c/51360
* c-parser.c (c_parser_omp_clause_num_threads,
c_parser_omp_clause_schedule): Call mark_exp_read.
2011-12-15 Romain Geissler <romain.geissler@gmail.com>
* builtins.def (BUILT_IN_STPNCPY_CHK): New definition.

2
gcc/c-parser.c
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@ -9011,6 +9011,7 @@ c_parser_omp_clause_num_threads (c_parser *parser, tree list)
{
location_t expr_loc = c_parser_peek_token (parser)->location;
tree c, t = c_parser_expression (parser).value;
mark_exp_read (t);
t = c_fully_fold (t, false, NULL);
c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
@ -9218,6 +9219,7 @@ c_parser_omp_clause_schedule (c_parser *parser, tree list)
here = c_parser_peek_token (parser)->location;
t = c_parser_expr_no_commas (parser, NULL).value;
mark_exp_read (t);
t = c_fully_fold (t, false, NULL);
if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)

6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2011-12-15 Jakub Jelinek <jakub@redhat.com>
PR c/51360
* semantics.c (finish_omp_clauses): For OMP_CLAUSE_NUM_THREADS_EXPR
and OMP_CLAUSE_SCHEDULE_CHUNK_EXPR call mark_rvalue_use.
2011-12-15 Dodji Seketeli <dodji@redhat.com>
PR c++/51473

4
gcc/cp/semantics.c
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@ -4087,6 +4087,8 @@ finish_omp_clauses (tree clauses)
error ("num_threads expression must be integral");
remove = true;
}
else
OMP_CLAUSE_NUM_THREADS_EXPR (c) = mark_rvalue_use (t);
break;
case OMP_CLAUSE_SCHEDULE:
@ -4101,6 +4103,8 @@ finish_omp_clauses (tree clauses)
error ("schedule chunk size expression must be integral");
remove = true;
}
else
OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = mark_rvalue_use (t);
break;
case OMP_CLAUSE_NOWAIT:

4
gcc/testsuite/ChangeLog
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@ -1,5 +1,9 @@
2011-12-15 Jakub Jelinek <jakub@redhat.com>
PR c/51360
* c-c++-common/gomp/pr51360.c: New test.
* g++.dg/gomp/pr51360.C: New test.
PR middle-end/49806
* gcc.dg/tree-ssa-vrp47.c: Add -fdump-tree-dom2 to dg-options.
Check for x_? & y in dom2 dump and xfail the check in dom1 dump.

27
gcc/testsuite/c-c++-common/gomp/pr51360.c Normal file
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@ -0,0 +1,27 @@
/* PR c/51360 */
/* { dg-do compile } */
/* { dg-options "-Wunused -W -fopenmp" } */
void
foo (int a, int b, int c, int d)
{
int m, n, o, p, i;
m = 6;
n = 1;
o = 5;
p = 1;
a = 6;
b = 1;
c = 5;
d = 1;
#pragma omp parallel for num_threads (m) if (n) schedule (static, o)
for (i = 0; i < 10; i++)
;
#pragma omp parallel for num_threads (a) if (b) schedule (static, c)
for (i = 0; i < 10; i++)
;
#pragma omp task final (p)
;
#pragma omp task final (d)
;
}

34
gcc/testsuite/g++.dg/gomp/pr51360.C Normal file
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@ -0,0 +1,34 @@
// PR c/51360
// { dg-do compile }
// { dg-options "-Wunused -W -fopenmp" }
template <typename T>
void
foo (T a, T b, T c, T d)
{
T m, n, o, p, i;
m = 6;
n = 1;
o = 5;
p = 1;
a = 6;
b = 1;
c = 5;
d = 1;
#pragma omp parallel for num_threads (m) if (n) schedule (static, o)
for (i = 0; i < 10; i++)
;
#pragma omp parallel for num_threads (a) if (b) schedule (static, c)
for (i = 0; i < 10; i++)
;
#pragma omp task final (p)
;
#pragma omp task final (d)
;
}
void
bar ()
{
foo (0, 0, 0, 0);
}