re PR middle-end/91920 (ggc 9.2.0 failing openmp compile on ppc64le)

	PR middle-end/91920
	* gimplify.c (omp_default_clause): Predetermine DECL_IN_CONSTANT_POOL
	variables as shared.

	* c-c++-common/gomp/pr91920.c: New test.

From-SVN: r276211

gcc/ChangeLog

+2019-09-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/91920
+	* gimplify.c (omp_default_clause): Predetermine DECL_IN_CONSTANT_POOL
+	variables as shared.
+
 2019-09-27  Iain Sandoe  <iain@sandoe.co.uk>
 
 	* config/rs6000/darwin.md (@macho_correct_pic_<mode>): New,

gcc/gimplify.c

@@ -7132,6 +7132,8 @@ omp_default_clause (struct gimplify_omp_ctx *ctx, tree decl,
   kind = lang_hooks.decls.omp_predetermined_sharing (decl);
   if (kind != OMP_CLAUSE_DEFAULT_UNSPECIFIED)
     default_kind = kind;
+  else if (VAR_P (decl) && TREE_STATIC (decl) && DECL_IN_CONSTANT_POOL (decl))
+    default_kind = OMP_CLAUSE_DEFAULT_SHARED;
 
   switch (default_kind)
     {

gcc/testsuite/ChangeLog

 2019-09-27  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/91920
+	* c-c++-common/gomp/pr91920.c: New test.
+
 	PR target/91919
-	* gcc.c-torture/compile/pr91919.c: New.test
+	* gcc.c-torture/compile/pr91919.c: New test.
 
 2019-09-27  Manfred Schwarb  <manfred99@gmx.ch>
 

gcc/testsuite/c-c++-common/gomp/pr91920.c

+/* PR middle-end/91920 */
+
+void bar (float *);
+
+void
+foo (void)
+{
+  int i;
+  float f[3] = { 0.0f, 0.0f, 0.0f };
+#pragma omp parallel for default(none) reduction(+:f[:3])
+  for (i = 0; i < 1000; i++)
+    {
+      int j;
+      float k[3] = { 0.25f, 0.5f, 0.75f };
+      for (j = 0; j < 3; j++)
+	f[j] += k[j];
+    }
+  bar (f);
+}