[Bug testsuite/65594] libgomp.graphite/force-parallel-6.c timeout

["vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65594

--- Comment #6 from vries at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #5)
> And use M instead of N in the outer two loops and define M to something
> lower (100, 50 or similar)? 

Yep, that works:
...
index 5071630..e9e4b56 100644
--- a/libgomp/testsuite/libgomp.graphite/force-parallel-6.c
+++ b/libgomp/testsuite/libgomp.graphite/force-parallel-6.c
@@ -1,4 +1,5 @@
 #define N 500
+#define M 50

 int X[2*N], Y[2*N], B[2*N];
 int A[2*N][2*N], C[2*N][2*N];
@@ -7,10 +8,10 @@ int foo(void)
 {
   int i, j, k;

-  for (i = 0; i < N; i++)
+  for (i = 0; i < M; i++)
     {
       X[i] = Y[i] + 10;
-      for (j = 0; j < N; j++)
+      for (j = 0; j < M; j++)
        {
          B[j] = A[j][N];
          for (k = 0; k < N; k++)
...

The only tricky bit is that N is used as array index twice, but I don't think
those need updating.