gcc/testsuite/gcc.dg/graphite/block-5.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];
  11 int b[N][N];
  12
  13 static int __attribute__((noinline))
  14 foo (void)
  15 {
  16   int i, j;
  17   int res = 0;
  18
  19   /* This loop nest should be blocked.  */
  20   for (j = 1; j < N; j++)
  21     for (i = 0; i < N; i++)
  22       a[i][j] = a[i][j-1] + b[i][j];
  23
  24   for (i = 0; i < N; i++)
  25     res += a[i][i];
  26
  27   return res;
  28 }
  29
  30 extern void abort ();
  31
  32 int
  33 main (void)
  34 {
  35   int i, j, res;
  36
  37   for (i = 0; i < N; i++)
  38     for (j = 0; j < N; j++)
  39       {
  40         a[i][j] = i + j;
  41         b[i][j] = i - j;
  42       }
  43
  44   res = foo ();
  45
  46 #if DEBUG
  47   fprintf (stderr, "res = %d \n", res);
  48 #endif
  49
  50   if (res != 1333300)
  51     abort ();
  52
  53   return 0;
  54 }
  55
  56 /* { dg-final { scan-tree-dump "tiled by" "graphite" } } */