omp-low.c (lower_rec_input_clauses): Don't force simd arrays for lastprivate…

omp-low.c (lower_rec_input_clauses): Don't force simd arrays for lastprivate non-addressable iterator of a...

	* omp-low.c (lower_rec_input_clauses): Don't force simd arrays for
	lastprivate non-addressable iterator of a collapse(1) simd.

	* gcc.dg/vect/vect-simd-16.c: New test.

From-SVN: r273620

gcc/ChangeLog

+2019-07-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* omp-low.c (lower_rec_input_clauses): Don't force simd arrays for
+	lastprivate non-addressable iterator of a collapse(1) simd.
+
 2019-07-17  Bill Seurer  <seurer@linux.vnet.ibm.com>
 
 	* config/rs6000/rs6000-call.c (HAVE_AS_GNU_ATTRIBUTE): define value

gcc/omp-low.c

@@ -5097,7 +5097,10 @@ lower_rec_input_clauses (tree clauses, gimple_seq *ilist, gimple_seq *dlist,
 		{
 		  tree y = lang_hooks.decls.omp_clause_dtor (c, new_var);
 		  if ((TREE_ADDRESSABLE (new_var) || nx || y
-		       || OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE
+		       || (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE
+			   && (gimple_omp_for_collapse (ctx->stmt) != 1
+			       || (gimple_omp_for_index (ctx->stmt, 0)
+				   != new_var)))
 		       || OMP_CLAUSE_CODE (c) == OMP_CLAUSE__CONDTEMP_
 		       || omp_is_reference (var))
 		      && lower_rec_simd_input_clauses (new_var, ctx, &sctx,

gcc/testsuite/ChangeLog

+2019-07-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.dg/vect/vect-simd-16.c: New test.
+
 2019-07-19  Jeff Law  <law@redhat.com>
 
 	* gcc.dg/tree-ssa/ssa-dse-37.c: New test.

gcc/testsuite/gcc.dg/vect/vect-simd-16.c

+/* { dg-additional-options "-fopenmp-simd" } */
+/* { dg-additional-options "-mavx" { target avx_runtime } } */
+/* { dg-final { scan-tree-dump-times "vectorized \[1-3] loops" 3 "vect" { target i?86-*-* x86_64-*-* } } } */
+
+#include "tree-vect.h"
+
+__attribute__((noipa)) int
+foo (int *a)
+{
+  int i;
+  #pragma omp simd lastprivate (i)
+  for (i = 0; i < 64; i++)
+    a[i] = i;
+  return i;
+}
+
+__attribute__((noipa)) void
+bar (int *a)
+{
+  int i;
+  #pragma omp simd private (i)
+  for (i = 0; i < 64; i++)
+    a[i] = i + 1;
+}
+
+__attribute__((noipa)) int
+baz (int *a)
+{
+  int i;
+  #pragma omp simd linear (i)
+  for (i = 0; i < 64; i++)
+    a[i] = i + 2;
+  return i;
+}
+
+int
+main ()
+{
+  int i;
+  int a[64];
+  check_vect ();
+  if (foo (a) != 64)
+    abort ();
+  for (i = 0; i < 64; ++i)
+    if (a[i] != i)
+      abort ();
+    else
+      a[i] = -8;
+  bar (a);
+  for (i = 0; i < 64; ++i)
+    if (a[i] != i + 1)
+      abort ();
+    else
+      a[i] = -8;
+  if (baz (a) != 64)
+    abort ();
+  for (i = 0; i < 64; ++i)
+    if (a[i] != i + 2)
+      abort ();
+  return 0;
+}