[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  <rguent...@suse.de>



    Revert

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



    Backport from mainline

    2012-07-04  Richard Guenther  <rguent...@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