genmatch.c (struct operand): Add OP_IF and OP_WITH op_types.

2015-07-14  Richard Biener  <rguenther@suse.de>

	* genmatch.c (struct operand): Add OP_IF and OP_WITH op_types.
	(struct if_expr): New.
	(struct with_expr): Likewise.
	(is_a_helper): Add helpers for if_expr and with_expr.
	(struct simplify): Add simplify_kind enum and member.  Remove
	ifexpr_vec member.
	(simplify::simplify): Adjust.
	(lower_commutative): Adjust.
	(lower_opt_convert): Likewise.
	(lower_cond): Likewise.
	(replace_id): Handle with_expr and if_expr.
	(lower_for): Adjust.
	(dt_simplify::gen_1): New recursive worker, split out from ...
	(dt_simplify::gen): ... here.  Deal with if and with expansion
	recursively.
	(capture_info::capture_info): Take context argument
	(capture_info::walk_result): Only analyze specific result.
	(parser::parse_result): New function.
	(parser::parse_simplify): Adjust to parse ifs with then end
	else case.
	(parser::parse_if): Simplify.
	(parser::parse_pattern): Pass down simplify kind.
	* match.pd: Convert if structure to new syntax.

From-SVN: r225760