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Re: [patch] for PRs 27639 and 26719

Zdenek Dvorak wrote:
> 	PR tree-optimization/27639
> 	PR tree-optimization/26719
> 	* tree-vrp.c (adjust_range_with_scev): Use scev_direction and adjust
> 	call to scev_probably_wraps_p.
> 	* tree-ssa-loop-niter.c (compare_trees, convert_step_widening,
> 	used_in_pointer_arithmetic_p, convert_step): Removed.
> 	(nowrap_type_p): New function.
> 	(scev_probably_wraps_p): Rewritten.
> 	* tree-scalar-evolution.c (instantiate_parameters_1): Do not call
> 	chrec_convert if chrec_convert_aggressive might have been used.
> 	* tree-chrec.c (convert_affine_scev, chrec_convert_1,
> 	scev_direction): New functions.
> 	(chrec_convert): Changed to a wrapper over chrec_convert_1.
> 	* tree-ssa-loop-ivopts.c (idx_find_step): Use convert_affine_scev
> 	instead of convert_step.
> 	* tree-flow.h (scev_probably_wraps_p): Declaration changed.
> 	(convert_step): Declaration removed.
> 	(convert_affine_scev, nowrap_type_p, scev_direction): Declare.
> 	* gcc.dg/pr27639.c: New test.
> 	* gcc.dg/pr26719.c: New test.
> 	* gcc.dg/tree-ssa/scev-cast.c: New test.

This looks ok to me, 
many thanks Zdenek for this cleanup.


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