tree-ssa-loop-ivopts.c (enum comp_iv_rewrite): New.

	* tree-ssa-loop-ivopts.c (enum comp_iv_rewrite): New.
	(extract_cond_operands): Detect condition comparing against non-
	invariant bound and return appropriate enum value.
	(find_interesting_uses_cond): Update use of extract_cond_operands.
	Handle its return value accordingly.
	(determine_group_iv_cost_cond, rewrite_use_compare): Ditto.

From-SVN: r247892