re PR middle-end/51644 (va_list vs. warning: ‘noreturn’ function does return is not...

re PR middle-end/51644 (va_list vs. warning: ‘noreturn’ function does return is not fixable)

	PR middle-end/51644
	PR middle-end/51647
	* tree-eh.c (decide_copy_try_finally): At -O0, return true
	even when ndests is not 1, if there are only gimple_clobber_p
	(or debug) stmts in the finally sequence.
	* tree-inline.c (estimate_num_insns): Return 0 for gimple_clobber_p
	stmts.

	* gcc.dg/pr51644.c: New test.
	* g++.dg/warn/Wreturn-4.C: New test.

From-SVN: r182589