Set PROP_gimple_lva for functions without IFN_VA_ARG

2015-04-17  Tom de Vries  <tom@codesourcery.com>

	* gimplify.c (gimplify_function_tree): Tentatively set PROP_gimple_lva
	in cfun->curr_properties.
	(gimplify_va_arg_expr): Clear PROP_gimple_lva in cfun->curr_properties
	if we generate an IFN_VA_ARG.
	* tree-inline.c (expand_call_inline): Reset PROP_gimple_lva in dest
	function if PROP_gimple_lva is not set in src function.

From-SVN: r222174