[Bug middle-end/58956] [4.7/4.8 Regression] wrong code at -O1 and above (affecting gcc 4.6 to trunk)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58956

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Dec  5 13:10:20 2013
New Revision: 205709

URL: http://gcc.gnu.org/viewcvs?rev=205709&root=gcc&view=rev
Log:
2013-12-05  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2013-11-19  Richard Biener  <rguenther@suse.de>

    PR middle-end/58956
    * tree-ssa-ter.c (find_replaceable_in_bb): Avoid forwarding
    loads into stmts that may clobber it.

    * gcc.dg/torture/pr58956.c: New testcase.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr58956.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-ssa-ter.c