2015-07-24  Richard Biener  <rguenther@suse.de>

	* gimple-fold.c (replace_stmt_with_simplification): Special-case
	valueizing call operands.
	* gimple-match-head.c (maybe_push_res_to_seq): Take
	number of call arguments from ops array.
	(do_valueize): New function.
	(gimple_simplify): Return true if valueization changed
	any operand even if the result didn't simplify further.

From-SVN: r226139