[libgomp, testsuite, openacc] Don't use const int for dimensions

Const int is handled differently at -O0 for -xc and -xc++, which can cause noise
in testsuite/libgomp.oacc-c-c++-common test-cases (which are both run for c and
c++) if const int is used for launch dimensions.

Fix this by using #defines instead.

2019-01-09  Tom de Vries  <tdevries@suse.de>

	PR target/88756
	* testsuite/libgomp.oacc-c-c++-common/reduction-1.c (ng, nw, vl): Use
	#define instead of "const int".
	* testsuite/libgomp.oacc-c-c++-common/reduction-2.c (ng, nw, vl): Same.
	* testsuite/libgomp.oacc-c-c++-common/reduction-3.c (ng, nw, vl): Same.
	* testsuite/libgomp.oacc-c-c++-common/reduction-4.c (ng, nw, vl): Same.
	* testsuite/libgomp.oacc-c-c++-common/reduction-5.c (ng, nw, vl): Same.

From-SVN: r267747

libgomp/ChangeLog

 2019-01-09  Tom de Vries  <tdevries@suse.de>
 
+	PR target/88756
+	* testsuite/libgomp.oacc-c-c++-common/reduction-1.c (ng, nw, vl): Use
+	#define instead of "const int".
+	* testsuite/libgomp.oacc-c-c++-common/reduction-2.c (ng, nw, vl): Same.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-3.c (ng, nw, vl): Same.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-4.c (ng, nw, vl): Same.
+	* testsuite/libgomp.oacc-c-c++-common/reduction-5.c (ng, nw, vl): Same.
+
+2019-01-09  Tom de Vries  <tdevries@suse.de>
+
 	* plugin/plugin-nvptx.c (nvptx_exec): Make sure to launch with at least
 	one worker.
 

libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-1.c

@@ -8,9 +8,9 @@
 #include <stdlib.h>
 #include "reduction.h"
 
-const int ng = 8;
-const int nw = 4;
-const int vl = 32;
+#define ng 8
+#define nw 4
+#define vl 32
 
 static void
 test_reductions (void)

libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-2.c

@@ -8,9 +8,9 @@
 #include <stdlib.h>
 #include "reduction.h"
 
-const int ng = 8;
-const int nw = 4;
-const int vl = 32;
+#define ng 8
+#define nw 4
+#define vl 32
 
 static void
 test_reductions (void)

libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-3.c

@@ -8,9 +8,9 @@
 #include <stdlib.h>
 #include "reduction.h"
 
-const int ng = 8;
-const int nw = 4;
-const int vl = 32;
+#define ng 8
+#define nw 4
+#define vl 32
 
 static void
 test_reductions (void)

libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-4.c

@@ -9,9 +9,9 @@
 #include <complex.h>
 #include "reduction.h"
 
-const int ng = 8;
-const int nw = 4;
-const int vl = 32;
+#define ng 8
+#define nw 4
+#define vl 32
 
 static void
 test_reductions (void)

libgomp/testsuite/libgomp.oacc-c-c++-common/reduction-5.c

@@ -9,9 +9,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-const int ng = 8;
-const int nw = 4;
-const int vl = 32;
+#define ng 8
+#define nw 4
+#define vl 32
 
 const int n = 100;