gcc/testsuite/gcc.dg/graphite/uns-interchange-15.c

   1 /* { dg-require-effective-target size32plus } */
   2
   3 #define DEBUG 0
   4 #if DEBUG
   5 #include <stdio.h>
   6 #endif
   7
   8 #define NMAX 2000
   9
  10 static unsigned int x[NMAX], a[NMAX][NMAX];
  11
  12 static unsigned int __attribute__((noinline))
  13 mvt (long N)
  14 {
  15   int i,j;
  16
  17   /* These two loops should be interchanged.  */
  18   for (i = 0; i < N; i++)
  19     for (j = 0; j < N; j++)
  20       x[i] += a[j][i];
  21
  22   return x[1];
  23 }
  24
  25 extern void abort ();
  26
  27 int
  28 main (void)
  29 {
  30   int i, j;
  31   unsigned int res;
  32
  33   for (i = 0; i < NMAX; i++)
  34     for (j = 0; j < NMAX; j++)
  35       a[i][j] = j;
  36
  37   for (i = 0; i < NMAX; i++)
  38     x[i] = i;
  39
  40   res = mvt (NMAX);
  41
  42 #if DEBUG
  43   fprintf (stderr, "res = %d \n", res);
  44 #endif
  45
  46   if (res != 2001)
  47     abort ();
  48
  49   return 0;
  50 }
  51
  52 /* { dg-final { scan-tree-dump "tiled by" "graphite" } } */