gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-pre-stats" } */
   3 int main(int argc, char **argv)
   4 {
   5         int a;
   6         int b;
   7         int c;
   8         b  = argc + 1;
   9         c =  argc + 2;
  10         a = b + c;
  11         if (argc * 2)
  12         {
  13                 c = argc + 3;
  14         }
  15         printf ("%d, %d\n", a, b + c);
  16 }
  17 /* We should eliminate one evaluation of b + c along the main path,
  18    causing one reload. */
  19 /* { dg-final { scan-tree-dump-times "Reloads:1" 1 "pre"} } */