2014-12-03  Richard Biener  <rguenther@suse.de>

	* builtins.c (fold_builtin_fpclassify): Change to take
	array of arguments instead of CALL_EXPR tree.
	(MAX_ARGS_TO_FOLD_BUILTIN): Remove.
	(fold_builtin_n): Dispatch to fold_builtin_varargs.
	(fold_call_expr): Always use fold_builtin_n.
	(fold_builtin_call_array): Change to not build the unfolded call,
	always use fold_builtin_n.
	(fold_builtin_varargs): Change to take array of arguments instead
	of CALL_EXPR tree.
	(fold_call_stmt): Always use fold_builtin_n.
	* tree.c (build_call_expr_loc_array): Use fold_build_call_array_loc.
	* fold-const.c (fold_build_call_array_loc): Build the call
	if fold_builtin_call_array returned NULL_TREE.
	* gimple-fold.c (gimple_fold_stmt_to_constant_1): Do not build
	a CALL_EXPR and use fold_builtin_call_array instead of
	fold_call_expr.

	cp/
	* constexpr.c (cxx_eval_builtin_function_call): Use
	fold_build_call_array_loc.

From-SVN: r218311