1 /* { dg-do compile } */
2 /* { dg-options "-O -ffast-math -fdump-tree-original" } */
3 
foo(double x)4 double foo (double x)
5 {
6   return (x + 0.5 - x - 0.5);
7 }
8 
9 /* { dg-final { scan-tree-dump "return 0.0;" "original" } } */
10