From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 21 Jul 2021 07:38:59 +0000 (+0200)
Subject: c++: Ensure OpenMP reduction with reference type references complete type [PR101516]
X-Git-Tag: upstream/12.2.0~6265
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aea199f96cf116ba4c81426207acde371556610c;p=platform%2Fupstream%2Fgcc.git

c++: Ensure OpenMP reduction with reference type references complete type [PR101516]

The following testcase ICEs because we haven't verified if reduction decl
has reference type that TREE_TYPE of the reference is a complete type,
require_complete_type on the decl doesn't ensure that.

2021-07-21  Jakub Jelinek  <jakub@redhat.com>

	PR c++/101516
	* semantics.c (finish_omp_reduction_clause): Also call
	complete_type_or_else and return true if it fails.

	* g++.dg/gomp/pr101516.C: New test.
---

diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index b97dc1f..331daf8 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -6070,7 +6070,8 @@ finish_omp_reduction_clause (tree c, bool *need_default_ctor, bool *need_dtor)
       if (!processing_template_decl)
 	{
 	  t = require_complete_type (t);
-	  if (t == error_mark_node)
+	  if (t == error_mark_node
+	      || !complete_type_or_else (oatype, NULL_TREE))
 	    return true;
 	  tree size = size_binop (EXACT_DIV_EXPR, TYPE_SIZE_UNIT (oatype),
 				  TYPE_SIZE_UNIT (type));
diff --git a/gcc/testsuite/g++.dg/gomp/pr101516.C b/gcc/testsuite/g++.dg/gomp/pr101516.C
new file mode 100644
index 0000000..48f60de
--- /dev/null
+++ b/gcc/testsuite/g++.dg/gomp/pr101516.C
@@ -0,0 +1,8 @@
+// PR c++/101516
+
+void
+foo (int (&v) [])
+{
+  #pragma omp parallel reduction (+:v)	// { dg-error "invalid use of array with unspecified bounds" }
+  ;
+}