* stor-layout.c (skip_simple_constant_arithmetic): Move to...
	* tree.c (skip_simple_constant_arithmetic): ...here and make public.
	(skip_simple_arithmetic): Tidy up.
	* tree.h (skip_simple_constant_arithmetic): Declare.
ada/
	* gcc-interface/decl.c (elaborate_expression_1): Skip only constant
	arithmetics when looking for a read-only variable in the expression.

From-SVN: r197815