gcc/testsuite/gcc.dg/graphite/interchange-14.c

   1 /* { dg-require-effective-target size32plus } */
   2
   3 #define DEBUG 0
   4 #if DEBUG
   5 #include <stdio.h>
   6 #endif
   7
   8 #define N 200
   9
  10 int A[N][N], B[N][N], C[N][N];
  11
  12 static void __attribute__((noinline))
  13 matmult (void)
  14 {
  15   int i, j, k;
  16
  17   for (i = 0; i < N; i++)
  18     for (j = 0; j < N; j++)
  19       A[i][j] = 0;
  20
  21   /* Loops J and K should be interchanged.  */
  22   for (i = 0; i < N; i++)
  23     for (j = 0; j < N; j++)
  24       for (k = 0; k < N; k++)
  25         A[i][j] += B[i][k] * C[k][j];
  26 }
  27
  28 extern void abort ();
  29
  30 int
  31 main (void)
  32 {
  33   int i, j, res = 0;
  34
  35   for (i = 0; i < N; i++)
  36     for (j = 0; j < N; j++)
  37       {
  38         B[i][j] = j;
  39         C[i][j] = i;
  40       }
  41
  42   matmult ();
  43
  44   for (i = 0; i < N; i++)
  45     res += A[i][i];
  46
  47 #if DEBUG
  48   fprintf (stderr, "res = %d \n", res);
  49 #endif
  50
  51   if (res != 529340000)
  52     abort ();
  53
  54   return 0;
  55 }
  56
  57 /* { dg-final { scan-tree-dump "tiled by" "graphite" } } */