int printf(char *, ...);
typedef void (*RET_FUNC)(int, void *);

void g(RET_FUNC func)
{
	func(33, 0);
}

int f()
{
	void *ret;
	ret = ({
		__label__ exit0;
		int retval;
		void __return_func(int retval_, void *fp){
			retval = retval_;
			goto exit0;
		}
		if (0) {
		  exit0:
			printf("f2: fp = 0x%x\n", __builtin_frame_address(0));
			return retval;
		}
		__return_func;
	});

	//g(__return_func, __builtin_frame_address(0));
	printf("f0: fp = 0x%x\n", __builtin_frame_address(0));
	printf("__return_func = %x\n", ret);
	g(ret);

	printf("not good\n");
	return 0;

//exit0:
	//printf("f2: fp = 0x%x\n", __builtin_frame_address(0));
	//return retval;
}

int main(int argc, char **argv)
{
	int t;
	printf("main before: fp = 0x%x\n", __builtin_frame_address(0));
	t = f();
	printf("f = %d\n", t);
	printf("main after: fp = 0x%x\n", __builtin_frame_address(0));
}