gcc/testsuite/gcc.dg/graphite/interchange-2.c

   1 /* { dg-require-effective-target size32plus } */
   2
   3 /* Formerly known as ltrans-2.c */
   4
   5 #define DEBUG 0
   6 #if DEBUG
   7 #include <stdio.h>
   8 #endif
   9
  10 double u[1782225];
  11
  12 static void __attribute__((noinline))
  13 foo (int N, int *res)
  14 {
  15   unsigned int i, j;
  16   double sum = 0;
  17
  18   /* This loop should be converted to a perfect nest and
  19      interchanged.  */
  20   for (i = 0; i < N; i++)
  21     {
  22       for (j = 0; j < N; j++)
  23         {
  24           sum = sum + u[i + 1335 * j];
  25           if (j == N - 1)
  26             u[1336 * i] *= 2;
  27         }
  28     }
  29
  30   *res = sum + N + u[1336 * 2] + u[1336];
  31 }
  32
  33 extern void abort ();
  34
  35 int
  36 main (void)
  37 {
  38   int i, j, res;
  39
  40   for (i = 0; i < 1782225; i++)
  41     u[i] = 2;
  42
  43   foo (1335, &res);
  44
  45 #if DEBUG
  46   fprintf (stderr, "res = %d \n", res);
  47 #endif
  48
  49   if (res != 3565793)
  50     abort ();
  51
  52   return 0;
  53 }
  54
  55 /* { dg-final { scan-tree-dump-times "will be interchanged" 1 "graphite" { xfail *-*-* } } } */