gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-16.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre-stats -std=c99" } */
   3 int foo(int k, int *x)
   4 {
   5   int j=0;
   6   int res = 0;
   7   /* We should pull res = *x all the way out of the do-while */
   8   do {
   9     for (int n=0;n<3;++n);
  10     res = *x;
  11   }  while (++j<k);
  12   return res;
  13 }
  14 /* { dg-final { scan-tree-dump-times "Eliminated: 1" 1 "pre"} } */
  15 /* { dg-final { cleanup-tree-dump "pre" } } */