[gomp4] don't use VLA's in the reduction tests

[Cesar Philippidis]

Nathan noticed that I was using VLA's in the a couple of compile-time
reduction tests. That's bad because ptx doesn't have support alloca. I
guess these tests used to pass because we were only running them on the
host.

I'll apply this patch shortly.

Cesar

2015-08-21  Cesar Philippidis  <ce...@codesourcery.com>

	gcc/testsuite/
	* c-c++-common/goacc/reduction-1.c: Don't use VLA's in accelerated
	regions.
	* c-c++-common/goacc/reduction-2.c: Likewise.
	* c-c++-common/goacc/reduction-3.c: Likewise.
	* c-c++-common/goacc/reduction-4.c: Likewise.


diff --git a/gcc/testsuite/c-c++-common/goacc/reduction-1.c b/gcc/testsuite/c-c++-common/goacc/reduction-1.c
index 8f7c70d..cec1dc8 100644
--- a/gcc/testsuite/c-c++-common/goacc/reduction-1.c
+++ b/gcc/testsuite/c-c++-common/goacc/reduction-1.c
@@ -1,11 +1,11 @@
 /* Integer reductions.  */
 
 #define vl 32
+#define n 1000
 
 int
 main(void)
 {
-  const int n = 1000;
   int i;
   int result, array[n];
   int lresult;
diff --git a/gcc/testsuite/c-c++-common/goacc/reduction-2.c b/gcc/testsuite/c-c++-common/goacc/reduction-2.c
index 7ff125f..964c596 100644
--- a/gcc/testsuite/c-c++-common/goacc/reduction-2.c
+++ b/gcc/testsuite/c-c++-common/goacc/reduction-2.c
@@ -1,11 +1,11 @@
 /* float reductions.  */
 
 #define vl 32
+#define n 1000
 
 int
 main(void)
 {
-  const int n = 1000;
   int i;
   float result, array[n];
   int lresult;
diff --git a/gcc/testsuite/c-c++-common/goacc/reduction-3.c b/gcc/testsuite/c-c++-common/goacc/reduction-3.c
index cd44559..edcdaf7 100644
--- a/gcc/testsuite/c-c++-common/goacc/reduction-3.c
+++ b/gcc/testsuite/c-c++-common/goacc/reduction-3.c
@@ -1,11 +1,11 @@
 /* double reductions.  */
 
 #define vl 32
+#define n 1000
 
 int
 main(void)
 {
-  const int n = 1000;
   int i;
   double result, array[n];
   int lresult;
diff --git a/gcc/testsuite/c-c++-common/goacc/reduction-4.c b/gcc/testsuite/c-c++-common/goacc/reduction-4.c
index ec3a9c9..212266a 100644
--- a/gcc/testsuite/c-c++-common/goacc/reduction-4.c
+++ b/gcc/testsuite/c-c++-common/goacc/reduction-4.c
@@ -1,11 +1,11 @@
 /* complex reductions.  */
 
 #define vl 32
+#define n 1000
 
 int
 main(void)
 {
-  const int n = 1000;
   int i;
   __complex__ double result, array[n];
   int lresult;