gcc/testsuite/gcc.dg/graphite/interchange-1.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[1782225];
  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 + 1335 * j];
  23
  24       u[1336 * i] *= 2;
  25     }
  26
  27   return sum + N + u[1336 * 2] + u[1336];
  28 }
  29
  30 extern void abort ();
  31
  32 int
  33 main (void)
  34 {
  35   int i, j, res;
  36
  37   for (i = 0; i < 1782225; i++)
  38     u[i] = 2;
  39
  40   res = foo (1335);
  41
  42 #if DEBUG
  43   fprintf (stderr, "res = %d \n", res);
  44 #endif
  45
  46   if (res != 3565793)
  47     abort ();
  48
  49   return 0;
  50 }
  51
  52 /*FIXME: Between isl 0.12 and isl 0.15 the schedule optimizer needs to print
  53 something canonical so that it can be checked in the test.  The final code
  54 generated by both are same in this case but the messaged printed are
  55 not consistent.  */
  56
  57 /* { dg-final { scan-tree-dump "tiled" "graphite" } } */