gcc/testsuite/gcc.dg/graphite/fuse-2.c

   1 /* Check that the three loops are fused.  */
   2
   3 /* Make sure we fuse the loops like this:
   4 AST generated by isl:
   5 for (int c0 = 0; c0 <= 99; c0 += 1) {
   6   S_3(c0);
   7   S_6(c0);
   8   S_9(c0);
   9 }
  10 */
  11
  12 /* { dg-final { scan-tree-dump-times "AST generated by isl:.*for \\(int c0 = 0; c0 <= 99; c0 \\+= 1\\) \\{.*S_.*\\(c0\\);.*S_.*\\(c0\\);.*S_.*\\(c0\\);.*\\}" 1 "graphite" } } */
  13
  14 #define MAX 100
  15 int A[MAX], B[MAX], C[MAX];
  16
  17 extern void abort ();
  18
  19 int
  20 main (void)
  21 {
  22   int i;
  23
  24   /* The next three loops should be fused.  */
  25   for (i = 0; i < MAX; i++)
  26     {
  27       A[i] = i;
  28       B[i] = i + 2;
  29       C[i] = i + 1;
  30     }
  31   for(int i=0; i<MAX; i++)
  32     A[i] += B[i];
  33   for(int i=0; i<MAX; i++)
  34     A[i] += C[i];
  35
  36   for (i = 0; i < MAX; i++)
  37     if (A[i] != 3*i+3)
  38       abort ();
  39
  40   return 0;
  41 }