gcc/testsuite/gcc.dg/graphite/interchange-13.c

   1 /* { dg-require-effective-target size32plus } */
   2
   3 /* Formerly known as ltrans-1.c */
   4
   5 #define DEBUG 0
   6 #if DEBUG
   7 #include <stdio.h>
   8 #endif
   9
  10 double u[25];
  11
  12 static int __attribute__((noinline))
  13 foo (int N)
  14 {
  15   int i, j;
  16   double sum = 0.0;
  17
  18   /* These two loops should be interchanged. */
  19   for (i = 0; i < N; i++)
  20     {
  21       for (j = 0; j < N; j++)
  22         sum = sum + u[i + 5 * j];
  23
  24       u[6 * i] *= 2;
  25     }
  26
  27   return sum + N + u[6];
  28 }
  29
  30 extern void abort ();
  31
  32 int
  33 main (void)
  34 {
  35   int i, j, res;
  36
  37   for (i = 0; i < 25; i++)
  38     u[i] = 2;
  39
  40   res = foo (5);
  41
  42 #if DEBUG
  43   fprintf (stderr, "res = %d \n", res);
  44 #endif
  45
  46   if (res != 59)
  47     abort ();
  48
  49   return 0;
  50 }
  51
  52
  53 /* { dg-final { scan-tree-dump-times "tiled by" 2 "graphite" } } */