gcc/testsuite/gcc.dg/graphite/block-3.c

   1 /* { dg-require-effective-target size32plus } */
   2 /* { dg-require-effective-target run_expensive_tests }  PR testsuite/48283 */
   3 /* { dg-timeout-factor 4.0 } */
   4
   5 #define DEBUG 0
   6 #if DEBUG
   7 #include <stdio.h>
   8 #endif
   9
  10 #define N 24
  11 #define M 100
  12
  13 int A[M][M][M], B[M][M], C[M][M];
  14
  15 static int __attribute__((noinline))
  16 foo (void)
  17 {
  18   int i, j, k;
  19
  20   /* These loops contain too few iterations to be blocked.  */
  21   for (i = 0; i < 24; i++)
  22     for (j = 0; j < 24; j++)
  23       for (k = 0; k < 24; k++)
  24         A[i][j][k] = B[i][k] * C[k][j];
  25
  26   /* These loops should still be loop blocked.  */
  27   for (i = 0; i < M; i++)
  28     for (j = 0; j < M; j++)
  29       for (k = 0; k < M; k++)
  30         A[i][j][k] = B[i][k] * C[k][j];
  31
  32   return A[0][0][0] + A[M-1][M-1][M-1];
  33 }
  34
  35 extern void abort ();
  36
  37 int
  38 main (void)
  39 {
  40   int i, j, res;
  41
  42   for (i = 0; i < M; i++)
  43     for (j = 0; j < M; j++)
  44       {
  45         B[i][j] = i;
  46         C[i][j] = j;
  47       }
  48
  49   res = foo ();
  50
  51 #if DEBUG
  52   fprintf (stderr, "res = %d \n", res);
  53 #endif
  54
  55   if (res != 9801)
  56     abort ();
  57
  58   return 0;
  59 }
  60
  61 /* { dg-final { scan-tree-dump "tiled by" "graphite" } } */