[patch] Minor ivopts improvements

[Richard Henderson]

On Fri, Apr 22, 2005 at 10:38:39AM +0200, Zdenek Dvorak wrote:
> 	* 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.

Ok.


r~