gcc/testsuite/gcc.dg/graphite/uns-interchange-12.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 unsigned int __attribute__((noinline))
  13 matmult (void)
  14 {
  15   int i, j, k;
  16
  17   /* Loops J and K should be interchanged.  */
  18   for (i = 0; i < N; i++)
  19     for (j = 0; j < N; j++)
  20       {
  21         A[i][j] = 0;
  22         for (k = 0; k < N; k++)
  23           A[i][j] += B[i][k] * C[k][j];
  24       }
  25
  26   return A[0][0] + A[N-1][N-1];
  27 }
  28
  29 extern void abort ();
  30
  31 int
  32 main (void)
  33 {
  34   int i, j;
  35   unsigned int res;
  36
  37   for (i = 0; i < N; i++)
  38     for (j = 0; j < N; j++)
  39       {
  40         A[i][j] = 0;
  41         B[i][j] = i - j;
  42         C[i][j] = i + j;
  43       }
  44
  45   res = matmult ();
  46
  47 #if DEBUG
  48   fprintf (stderr, "res = %d \n", res);
  49 #endif
  50
  51   if (res != 2626800)
  52     abort ();
  53
  54   return 0;
  55 }
  56
  57 /* { dg-final { scan-tree-dump "tiled by" "graphite" } } */