[Bug tree-optimization/60172] New: ARM performance regression from trunk@207239

[joey.ye at arm dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60172

            Bug ID: 60172
           Summary: ARM performance regression from trunk@207239
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: joey.ye at arm dot com

Dhrystone on Cortex-M4 drops by 1.5% with this patch:

    2014-01-29  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/58742
        * tree-ssa-forwprop.c (associate_pointerplus): Rename to
        associate_pointerplus_align.
        (associate_pointerplus_diff): New function.
        (associate_pointerplus): Likewise.  Call associate_pointerplus_align
        and associate_pointerplus_diff.

        * gcc.dg/pr58742-1.c: New testcase.
        * gcc.dg/pr58742-2.c: Likewise.
        * gcc.dg/pr58742-3.c: Likewise.


    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@207239

Options used: -O2 -fno-inline -fno-common