* simplify-rtx.c (simplify_unary_operation_1): Use unsigned arithmetics
	in masking operations.
	(simplify_const_unary_operation): Likewise.
	(simplify_binary_operation_1): Likewise.
	(simplify_const_binary_operation): Likewise.
	(simplify_const_relational_operation): Likewise.
	(simplify_ternary_operation): Likewise.
	(simplify_immed_subreg): Likewise.

From-SVN: r165320