gcc/testsuite/gcc.dg/graphite/uns-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 unsigned 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;
  34   unsigned res = 0;
  35
  36   for (i = 0; i < N; i++)
  37     for (j = 0; j < N; j++)
  38       {
  39         B[i][j] = j;
  40         C[i][j] = i;
  41       }
  42
  43   matmult ();
  44
  45   for (i = 0; i < N; i++)
  46     res += A[i][i];
  47
  48 #if DEBUG
  49   fprintf (stderr, "res = %d \n", res);
  50 #endif
  51
  52   if (res != 529340000)
  53     abort ();
  54
  55   return 0;
  56 }
  57
  58 /* { dg-final { scan-tree-dump "tiled by" "graphite" } } */