* loop.c (canonicalize_condition): New function,
	broken out of get_condition.
	(get_condition): Use it.
	* expr.h (canonicalize_condition): Prototype it.

	* tree.h (tree_int_cst_msb): Declare.
	* tree.c (tree_int_cst_msb): New function.

From-SVN: r32045