* gimple-fold.c (size_must_be_zero_p): Use value_range API instead

	* gimple-fold.c (size_must_be_zero_p): Use value_range API instead
	of performing ad-hoc calculations.
	* tree-ssanames.c (set_range_info): New overloaded function
	accepting value_range &.
	(get_range_info): Same.
	* tree-ssanames.h (set_range_info_raw): Remove.
	(set_range_info): New prototype.
	(get_range_info): Same.
	* tree-vrp.h (value_range::null_p): Rename to zero_p.
	* tree-vrp.c (value_range::null_p): Same.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@265952 138bc75d-0d04-0410-961f-82ee72b054a4