* alias.c: Minor reformatting.
	* flow.c: Likewise.
	* regs.h: Likewise.
	* stor-layout.c: Likewise.
	* fold-const.c: Likewise.
 	(OVERFLOW_SUM_SIGN): Renamed from overflow_sum_sign.
	(struct cb_args, const_binop_1, const_binop): Pass type of arg,
	not arg itself.
	(size_int_wide): Cache nodes even if garbage collecting.
	(twoval_comparison_p): Reenable SAVE_EXPR case if operand
	of SAVE_EXPR has no side effects.
	* cse.c: Move a comment.
	* tree.c: Minor reformatting.
	(int_size_in_bytes): Return -1 if constant overflows.
	* reload.c (combine_reloads): Do nothing if no output reload

From-SVN: r31017