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

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