[Bug middle-end/53844] [4.6 Regression] GCC generates suboptimal code for unused members of classes in some cases on multiple targets.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53844

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-18 13:46:46 UTC ---
Author: rguenth
Date: Mon Feb 18 13:46:37 2013
New Revision: 196120

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196120
Log:
2013-02-18  Richard Biener  <rguenther@suse.de>

    Revert
    2013-02-04  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2012-07-04  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/53844
    * tree-ssa-dse.c (dse_possible_dead_store_p): Properly handle
    the loop virtual PHI.

    * g++.dg/tree-ssa/pr53844.C: New testcase.

Removed:
    branches/gcc-4_7-branch/gcc/testsuite/g++.dg/tree-ssa/pr53844.C
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_7-branch/gcc/tree-ssa-dse.c