用于进行gcc测试

				// Copyright (C) 2005 Free Software Foundation, Inc.				// Contributed by Nathan Sidwell 13 Oct 2005 								// PR 22551:ICE				// Origin:  Johnny Casey 								const int B = ~(~0u >> 1);								#define b(x) (B + x)												int Foo (int error)				{				  switch (error)				  {				  case b (1): return 0;				  case b (2): return 0;				  case b (3): return 0;				  case b (4): return 0;				  case b (5): return 0;				  }				  return 0;				}