[Bug tree-optimization/41488] IVOpts cannot coalesce multiple induction variables

[amker at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41488

--- Comment #6 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue Dec 10 06:31:41 2013
New Revision: 205848

URL: http://gcc.gnu.org/viewcvs?rev=205848&root=gcc&view=rev
Log:

    PR tree-optimization/41488
    * tree-ssa-loop-ivopts.c (add_old_iv_candidates): Don't add cand
    for PEELED_CHREC kind IV.
    * tree-scalar-evolution.c: Include necessary header files.
    (peeled_chrec_map, simplify_peeled_chrec): New.
    (analyze_evolution_in_loop): New static variable.
    Call simplify_peeled_chrec.
    (scev_initialize): Initialize peeled_chrec_map.
    (scev_reset, scev_finalize): Reset and release peeled_chrec_map.

    PR tree-optimization/41488
    * gcc.dg/tree-ssa/scev-7.c: New test.
    * gcc.dg/pr41488.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/pr41488.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/scev-7.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-scalar-evolution.c
    trunk/gcc/tree-ssa-loop-ivopts.c