gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-fre1-details" } */
   3
   4 int foo (int a, int s, unsigned int k)
   5 {
   6   int i = a, j = a;
   7   do
   8     {
   9       i += s;
  10       j += j;
  11       j -= a;
  12     }
  13   while (k--);
  14   return j+i;
  15 }
  16
  17 /* We want the redundant PHI for j to disappear.  */
  18 /* { dg-final { scan-tree-dump "Replaced redundant PHI node defining j" "fre1" } } */