tree-ssa-loop-ivopts.c (struct cost_pair): Add value field.

tree-ssa-loop-ivopts.c (struct cost_pair): Add value field.

	* tree-ssa-loop-ivopts.c (struct cost_pair): Add value field.
	(find_interesting_uses_cond): Do not use integer_zerop and
	integer_nonzerop to check for integer constants.
	(set_use_iv_cost): Record the value field.
	(determine_use_iv_cost_generic, determine_use_iv_cost_address,
	determine_use_iv_cost_outer): Set the value field of the cost pair.
	(may_eliminate_iv): Do not return the comparison code.
	(iv_elimination_compare): New function.
	(determine_use_iv_cost_condition): Set the value field.  Record
	noneliminable invariants correctly.
	(rewrite_use_compare, rewrite_use_outer): Use the value field.

From-SVN: r98634