[nvptx] Add vector_length 128 testcases

Add a couple of test-cases using vector length 128, while checking that we
override to vector length 32.

2019-01-03  Tom de Vries  <tdevries@suse.de>

	* testsuite/libgomp.oacc-c-c++-common/vector-length-128-1.c: New test.
	* testsuite/libgomp.oacc-c-c++-common/vector-length-128-3.c: New test.

From-SVN: r267559

libgomp/ChangeLog

+2019-01-03  Tom de Vries  <tdevries@suse.de>
+
+	* testsuite/libgomp.oacc-c-c++-common/vector-length-128-1.c: New test.
+	* testsuite/libgomp.oacc-c-c++-common/vector-length-128-3.c: New test.
+
 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.

libgomp/testsuite/libgomp.oacc-c-c++-common/vector-length-128-1.c

+/* { dg-do run { target openacc_nvidia_accel_selected } } */
+/* { dg-additional-options "-foffload=-fdump-tree-oaccdevlow" } */
+/* { dg-set-target-env-var "GOMP_DEBUG" "1" } */
+
+#include <stdlib.h>
+
+#define N 1024
+
+unsigned int a[N];
+unsigned int b[N];
+unsigned int c[N];
+unsigned int n = N;
+
+int
+main (void)
+{
+  for (unsigned int i = 0; i < n; ++i)
+    {
+      a[i] = i % 3;
+      b[i] = i % 5;
+    }
+
+#pragma acc parallel vector_length (128) copyin (a,b) copyout (c)
+  {
+#pragma acc loop vector
+    for (unsigned int i = 0; i < n; i++)
+      c[i] = a[i] + b[i];
+  }
+
+  for (unsigned int i = 0; i < n; ++i)
+    if (c[i] != (i % 3) + (i % 5))
+      abort ();
+
+  return 0;
+}
+/* { dg-prune-output "using vector_length \\(32\\), ignoring 128" } */
+
+/* { dg-final { scan-offload-tree-dump "__attribute__\\(\\(oacc function \\(1, 1, 32\\)" "oaccdevlow" } } */
+/* { dg-output "nvptx_exec: kernel main\\\$_omp_fn\\\$0: launch gangs=1, workers=1, vectors=32" } */

libgomp/testsuite/libgomp.oacc-c-c++-common/vector-length-128-3.c

+/* { dg-do run { target openacc_nvidia_accel_selected } } */
+/* { dg-additional-options "-foffload=-fdump-tree-oaccdevlow" } */
+/* We default to warp size 32 for the vector length, so the GOMP_OPENACC_DIM has
+   no effect.  */
+/* { dg-set-target-env-var "GOMP_OPENACC_DIM" "-:-:128" } */
+/* { dg-set-target-env-var "GOMP_DEBUG" "1" } */
+
+
+#include <stdlib.h>
+
+#define N 1024
+
+unsigned int a[N];
+unsigned int b[N];
+unsigned int c[N];
+unsigned int n = N;
+
+int
+main (void)
+{
+  for (unsigned int i = 0; i < n; ++i)
+    {
+      a[i] = i % 3;
+      b[i] = i % 5;
+    }
+
+#pragma acc parallel copyin (a,b) copyout (c)
+  {
+#pragma acc loop vector
+    for (unsigned int i = 0; i < n; i++)
+      c[i] = a[i] + b[i];
+  }
+
+  for (unsigned int i = 0; i < n; ++i)
+    if (c[i] != (i % 3) + (i % 5))
+      abort ();
+
+  return 0;
+}
+
+/* { dg-final { scan-offload-tree-dump "__attribute__\\(\\(oacc function \\(1, 1, 32\\)" "oaccdevlow" } } */
+/* { dg-output "nvptx_exec: kernel main\\\$_omp_fn\\\$0: launch gangs=1, workers=1, vectors=32" } */