1/* Copyright (C) 2001 Free Software Foundation, Inc.  */
2
3/* { dg-do preprocess } */
4
5/* Source: Neil Booth, 2 Oct 2001.
6
7   Tests that we clear the disabled flag that is set by the
8   macro-defined-to-itself optimization (the optimization might not be
9   worth it).  */
10
11#define foo foo
12#undef foo
13#define foo 1
14#if !foo
15#error foo still disabled!
16#endif
17