[Bug rtl-optimization/32283] Missed induction variable optimization

[rakdver at gcc dot gnu dot org]

------- Comment #11 from rakdver at gcc dot gnu dot org  2007-09-08 13:19 -------
Subject: Bug 32283

Author: rakdver
Date: Sat Sep  8 13:18:49 2007
New Revision: 128272

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128272
Log:
        PR tree-optimization/32283
        * tree-ssa-loop-ivopts.c (may_eliminate_iv): Use
        estimated_loop_iterations.
        (determine_use_iv_cost_condition): Decrease cost of expressions
        used in iv elimination.

        * gcc.dg/tree-ssa/loop-31.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/loop-31.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32283