builtins.c (expand_builtin_mathfn): Always stabilize the argument list against re...

builtins.c (expand_builtin_mathfn): Always stabilize the argument list against re-evaluation.

	* builtins.c (expand_builtin_mathfn): Always stabilize the argument
	list against re-evaluation.  If expand_unop fails, call expand_call
	with the stabilized argument list rather than return NULL_RTX.
	(expand_builtin_mathfn2): Likewise, always stabilize the argument
	list, and call expand_call ourselves if expand_binop fails.

Co-Authored-By: Richard Henderson <rth@redhat.com>
From-SVN: r68526