[Bug rtl-optimization/57569] [4.8 Regression] wrong code for struct copy at -O3 on x86_64-linux

["wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57569

--- Comment #7 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Mar 17 15:31:43 2014
New Revision: 208620

URL: http://gcc.gnu.org/viewcvs?rev=208620&root=gcc&view=rev
Log:
gcc/

2014-03-17  Mikael Pettersson  <mikpelinux@gmail.com>
        Committed by Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

    Backport from mainline:

    2013-06-20  Joern Rennecke <joern.rennecke@embecosm.com>

    PR rtl-optimization/57425
    PR rtl-optimization/57569
    * alias.c (write_dependence_p): Remove parameters mem_mode and
    canon_mem_addr.  Add parameters x_mode, x_addr and x_canonicalized.
    Changed all callers.
    (canon_anti_dependence): Get comments and semantics in sync.
    Add parameter mem_canonicalized.  Changed all callers.
    * rtl.h (canon_anti_dependence): Update prototype.

    2013-06-16  Joern Rennecke <joern.rennecke@embecosm.com>

    PR rtl-optimization/57425
    PR rtl-optimization/57569
    * alias.c (write_dependence_p): Add new parameters mem_mode,
    canon_mem_addr and mem_canonicalized.  Change type of writep to bool.
    Changed all callers.
    (canon_anti_dependence): New function.
    * cse.c (check_dependence): Use canon_anti_dependence.
    * cselib.c (cselib_invalidate_mem): Likewise.
    * rtl.h (canon_anti_dependence): Declare.

gcc/testsuite/

2014-03-17  Mikael Pettersson  <mikpelinux@gmail.com>
        Committed by Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

    Backport from mainline:

    2013-06-16  Joern Rennecke <joern.rennecke@embecosm.com>

    PR rtl-optimization/57425
    PR rtl-optimization/57569
    * gcc.dg/torture/pr57425-1.c, gcc.dg/torture/pr57425-2.c: New files.
    * gcc.dg/torture/pr57425-3.c, gcc.dg/torture/pr57569.c: Likewise.


Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57425-1.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57425-2.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57425-3.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr57569.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/alias.c
    branches/gcc-4_8-branch/gcc/cse.c
    branches/gcc-4_8-branch/gcc/cselib.c
    branches/gcc-4_8-branch/gcc/rtl.h
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog