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* [gcc r13-1888] openmp: Reject invalid forms of C++ #pragma omp atomic compare [PR106448]
@ 2022-07-29 8:00 Jakub Jelinek
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From: Jakub Jelinek @ 2022-07-29 8:00 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:2dcceedb3c121f2498ae58d8414e7b8454b7bf55
commit r13-1888-g2dcceedb3c121f2498ae58d8414e7b8454b7bf55
Author: Jakub Jelinek <jakub@redhat.com>
Date: Fri Jul 29 09:59:19 2022 +0200
openmp: Reject invalid forms of C++ #pragma omp atomic compare [PR106448]
The allowed syntaxes of atomic compare don't allow ()s around the condition
of ?:, but we were accepting it in one case for C++.
Fixed thusly.
2022-07-29 Jakub Jelinek <jakub@redhat.com>
PR c++/106448
* parser.cc (cp_parser_omp_atomic): For simple cast followed by
CPP_QUERY token, don't try cp_parser_binary_operation if compare
is true.
* c-c++-common/gomp/atomic-32.c: New test.
Diff:
---
gcc/cp/parser.cc | 4 +++-
gcc/testsuite/c-c++-common/gomp/atomic-32.c | 14 ++++++++++++++
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc
index 4f67441eeb1..826595a3722 100644
--- a/gcc/cp/parser.cc
+++ b/gcc/cp/parser.cc
@@ -41535,7 +41535,9 @@ restart:
goto saw_error;
}
token = cp_lexer_peek_token (parser->lexer);
- if (token->type != CPP_SEMICOLON && !cp_tree_equal (lhs, rhs1))
+ if (token->type != CPP_SEMICOLON
+ && (!compare || token->type != CPP_QUERY)
+ && !cp_tree_equal (lhs, rhs1))
{
cp_parser_abort_tentative_parse (parser);
cp_parser_parse_tentatively (parser);
diff --git a/gcc/testsuite/c-c++-common/gomp/atomic-32.c b/gcc/testsuite/c-c++-common/gomp/atomic-32.c
new file mode 100644
index 00000000000..e39a96789d6
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/gomp/atomic-32.c
@@ -0,0 +1,14 @@
+/* PR c++/106448 */
+
+int x, expr;
+
+void
+foo (void)
+{
+ #pragma omp atomic compare
+ x = (expr > x) ? expr : x; /* { dg-error "invalid (form|operator)" } */
+ #pragma omp atomic compare
+ x = (x < expr) ? expr : x; /* { dg-error "invalid (form|operator)" } */
+ #pragma omp atomic compare
+ x = (x == expr) ? expr : x; /* { dg-error "invalid (form|operator)" } */
+}
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