From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 30 Aug 2019 12:46:52 +0000 (+0200)
Subject: backport: re PR c++/90950 (OpenMP clause handling rejecting references to incomplete... 
X-Git-Tag: releases/gcc-7.5.0~203
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=630bb153d6a64d274087f4a60c848da3ce54df86;p=thirdparty%2Fgcc.git

backport: re PR c++/90950 (OpenMP clause handling rejecting references to incomplete types in templates)

	Backported from mainline
	2019-06-21  Jakub Jelinek  <jakub@redhat.com>

	PR c++/90950
	* semantics.c (finish_omp_clauses): Don't reject references to
	incomplete types if processing_template_decl.

	* g++.dg/gomp/lastprivate-1.C: New test.

From-SVN: r275160
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index bd1e464c107d..4f55803a5dc3 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,6 +1,12 @@
 2019-08-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2019-06-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/90950
+	* semantics.c (finish_omp_clauses): Don't reject references to
+	incomplete types if processing_template_decl.
+
 	2019-05-10  Jakub Jelinek  <jakub@redhat.com>
 
 	PR pch/90326
diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index 6ed0495c33bd..694aef52fa09 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -7369,7 +7369,8 @@ finish_omp_clauses (tree clauses, enum c_omp_region_type ort)
 	  t = require_complete_type (t);
 	  if (t == error_mark_node)
 	    remove = true;
-	  else if (TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE
+	  else if (!processing_template_decl
+		   && TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE
 		   && !complete_type_or_else (TREE_TYPE (TREE_TYPE (t)), t))
 	    remove = true;
 	}
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index dcb3634ead05..5ec7de87a3ec 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2019-08-30  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
+	2019-06-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/90950
+	* g++.dg/gomp/lastprivate-1.C: New test.
+
 	2019-06-12  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/90760
diff --git a/gcc/testsuite/g++.dg/gomp/lastprivate-1.C b/gcc/testsuite/g++.dg/gomp/lastprivate-1.C
new file mode 100644
index 000000000000..ce25e1a6b900
--- /dev/null
+++ b/gcc/testsuite/g++.dg/gomp/lastprivate-1.C
@@ -0,0 +1,16 @@
+// PR c++/90950
+// { dg-do compile }
+
+template <typename T>
+T
+foo (void)
+{
+  T y = 0;
+  T &x = y;
+  #pragma omp parallel for lastprivate (x)
+  for (int i = 0; i < 8; ++i)
+    x = i;
+  return x;
+}
+
+int a = foo<int> ();