gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-46.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-fre1-details" } */
   3
   4 int x[1024];
   5 int foo (int a, int s, unsigned int k)
   6 {
   7   int i = a, j = a;
   8   int sum = 0;
   9   do
  10     {
  11       sum += x[i];
  12       sum += x[j];
  13       i += s;
  14       j += s;
  15     }
  16   while (k--);
  17   return sum;
  18 }
  19
  20 /* We want to remove the redundant induction variable and thus its PHI node.  */
  21 /* { dg-final { scan-tree-dump "Removing dead stmt \[^\r\n\]*PHI" "fre1" } } */