* [committed] openmp: Map holds clause to IFN_ASSUME for C/C++
@ 2022-10-06 8:42 Jakub Jelinek
0 siblings, 0 replies; only message in thread
From: Jakub Jelinek @ 2022-10-06 8:42 UTC (permalink / raw)
To: gcc-patches; +Cc: Tobias Burnus
Hi!
Now that [[assume (cond)]] support is in, this simple patch makes
#pragma omp assume holds(cond)
use it.
Committed to trunk.
2022-10-06 Jakub Jelinek <jakub@redhat.com>
* c-parser.cc (c_parser_omp_assumption_clauses): Emit IFN_ASSUME
call for holds clause on assume construct.
* parser.cc (cp_parser_omp_assumption_clauses): Emit IFN_ASSUME
call for holds clause on assume construct.
* c-c++-common/gomp/assume-4.c: New test.
--- gcc/c/c-parser.cc.jj 2022-10-06 08:56:28.570128568 +0200
+++ gcc/c/c-parser.cc 2022-10-06 10:07:25.596420330 +0200
@@ -23571,10 +23571,12 @@ c_parser_omp_assumption_clauses (c_parse
tree t = convert_lvalue_to_rvalue (eloc, expr, true, true).value;
t = c_objc_common_truthvalue_conversion (eloc, t);
t = c_fully_fold (t, false, NULL);
- if (is_assume)
+ if (is_assume && t != error_mark_node)
{
- /* FIXME: Emit .ASSUME (t) call here. */
- (void) t;
+ tree fn = build_call_expr_internal_loc (eloc, IFN_ASSUME,
+ void_type_node, 1,
+ t);
+ add_stmt (fn);
}
parens.skip_until_found_close (parser);
}
--- gcc/cp/parser.cc.jj 2022-10-06 08:56:28.625127823 +0200
+++ gcc/cp/parser.cc 2022-10-06 10:20:35.452732109 +0200
@@ -46023,13 +46023,15 @@ cp_parser_omp_assumption_clauses (cp_par
matching_parens parens;
if (parens.require_open (parser))
{
+ location_t eloc = cp_lexer_peek_token (parser->lexer)->location;
tree t = cp_parser_assignment_expression (parser);
if (!type_dependent_expression_p (t))
t = contextual_conv_bool (t, tf_warning_or_error);
- if (is_assume)
+ if (is_assume && !error_operand_p (t))
{
- /* FIXME: Emit .ASSUME (t) call here. */
- (void) t;
+ t = build_call_expr_internal_loc (eloc, IFN_ASSUME,
+ void_type_node, 1, t);
+ finish_expr_stmt (t);
}
if (!parens.require_close (parser))
cp_parser_skip_to_closing_parenthesis (parser,
--- gcc/testsuite/c-c++-common/gomp/assume-4.c.jj 2022-10-06 10:17:58.028862432 +0200
+++ gcc/testsuite/c-c++-common/gomp/assume-4.c 2022-10-06 10:23:41.011221059 +0200
@@ -0,0 +1,23 @@
+/* { dg-do compile } */
+/* { dg-options "-fopenmp -O2 -fdump-tree-optimized" } */
+/* { dg-final { scan-tree-dump-times "return 42;" 2 "optimized" } } */
+/* { dg-final { scan-tree-dump-not "return -1;" "optimized" } } */
+
+int
+foo (int x)
+{
+ int y;
+ #pragma omp assume holds (x == 42)
+ y = x;
+ return y;
+}
+
+int
+bar (int x)
+{
+ #pragma omp assume holds (x < 42)
+ ;
+ if (x == 42)
+ return -1;
+ return 42;
+}
Jakub
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