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Re: [patch] for PR 18687


On Tue, Feb 08, 2005 at 05:41:24PM +0100, Zdenek Dvorak wrote:
> 	* tree-flow.h (find_loop_niter): Declare.
> 	* tree-ssa-loop-ivcanon.c (canonicalize_loop_induction_variables):
> 	Try using scev even for loops with more than one exit.
> 	* tree-ssa-loop-ivopts.c (struct loop_data): Removed niter field.
> 	(struct ivopts_data): Added niters field.
> 	(struct nfe_cache_elt): New.
> 	(nfe_hash, nfe_eq, niter_for_exit, niter_for_single_dom_exit): New
> 	functions.
> 	(tree_ssa_iv_optimize_init): Initialize niters cache.
> 	(determine_number_of_iterations): Removed.
> 	(find_induction_variables): Do not call determine_number_of_iterations.
> 	Access niters for single exit through niter_for_single_dom_exit.
> 	(add_iv_outer_candidates): Access niters for single exit through
> 	niter_for_single_dom_exit.
> 	(may_eliminate_iv): Take data argument.  Use niter_for_exit.  Do not use
> 	number_of_iterations_cond.
> 	(iv_period): New function.
> 	(determine_use_iv_cost_condition): Pass data to may_eliminate_iv.
> 	(may_replace_final_value): Take data argument.  Use
> 	niter_for_single_dom_exit.
> 	(determine_use_iv_cost_outer): Pass data to may_replace_final_value.
> 	(rewrite_use_compare): Pass data to may_eliminate_iv.
> 	(rewrite_use_outer): Pass data to may_replace_final_value.
> 	(free_loop_data): Clean up the niters cache.
> 	(tree_ssa_iv_optimize_finalize): Free the niters cache.
> 	(tree_ssa_iv_optimize_loop): Do not call loop_commit_inserts.
> 	* tree-ssa-loop-niter.c (find_loop_niter): New function.
> 	(find_loop_niter_by_eval): Use tree_int_cst_lt.
> 	(num_ending_zeros): Moved to tree.c.
> 	* tree.h (num_ending_zeros): Declare.
> 	* tree.c (num_ending_zeros): Moved from tree.c.

Ok.



r~


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