[Bug middle-end/45098] Missed induction variable optimization

[vries at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45098

--- Comment #5 from vries at gcc dot gnu.org 2011-05-19 09:03:15 UTC ---
Author: vries
Date: Thu May 19 09:03:12 2011
New Revision: 173894

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173894
Log:
2011-05-19  Tom de Vries  <tom@codesourcery.com>

    PR target/45098
    * tree-ssa-loop-ivopts.c (get_expr_id): Factored new function out of
    get_loop_invariant_expr_id.
    (get_loop_invariant_expr_id): Use get_expr_id.
    (parm_decl_cost): New function.
    (determine_use_iv_cost_condition): Use get_expr_id and parm_decl_cost.
    Improve bound cost estimation.  Use different inv_expr_id for elim and
    express cases.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c