2014-11-26  Richard Biener  <rguenther@suse.de>

	* fold-const.h (const_unop): Declare.
	(const_binop): Likewise.
	* fold-const.c (const_binop): Export overload that expects
	a type parameter and dispatches to fold_relational_const as well.
	Check both operand kinds for guarding the transforms.
	(const_unop): New function, with constant folding from fold_unary_loc.
	(fold_unary_loc): Dispatch to const_unop for tcc_constant operand.
	Remove constant folding done there from the simplifications.
	(fold_binary_loc): Check for constants using CONSTANT_CLASS_P.
	(fold_negate_expr): Remove dead code from the REAL_CST case.
	Avoid building garbage in the COMPLEX_CST case.
	* gimple-match-head.c (gimple_resimplify1): Dispatch to
	const_unop.
	(gimple_resimplify2): Dispatch to const_binop.
	(gimple_simplify): Likewise.

From-SVN: r218086