用于进行gcc测试

				/* { dg-do compile } */				/* { dg-options "-O1 -fdump-tree-cfg" } */				/* { dg-skip-if "" { "*-*-*" } { "-fpic" "-fPIC" } { "" } } */				double a;				void t()				{					a=1;				}				void t1(void);				void abort(void);								void q()				{					try {						t();					}					catch (...) {abort();}				}				/* We shouldnotice nothrow attribute.  */				/* { dg-final { scan-tree-dump-times "exception" 0 "cfg"} } */				/* { dg-final { cleanup-tree-dump "cfg" } } */