gcc/testsuite/gcc.dg/graphite/interchange-11.c

   1 /* { dg-require-effective-target size32plus } */
   2
   3 #define DEBUG 0
   4 #if DEBUG
   5 #include <stdio.h>
   6 #endif
   7
   8 double u[1782225];
   9
  10 static void __attribute__((noinline))
  11 foo (int N, int *res)
  12 {
  13   int i, j;
  14   double sum = 0.0;
  15
  16   /* These two loops should be interchanged.  */
  17   for (i = 0; i < 1335; i++)
  18     {
  19       for (j = 0; j < 1335; j++)
  20         sum = sum + u[i + 1335 * j];
  21
  22       u[1336 * i] *= 2;
  23     }
  24   *res = sum;
  25 }
  26
  27 extern void abort ();
  28
  29 int
  30 main (void)
  31 {
  32   int i, res;
  33
  34   for (i = 0; i < 1782225; i++)
  35     u[i] = 2;
  36
  37   foo (1335, &res);
  38
  39 #if DEBUG
  40   fprintf (stderr, "res = %d \n", res);
  41 #endif
  42
  43   if (res != 3564450)
  44     abort ();
  45
  46   return 0;
  47 }