[Bug tree-optimization/62031] [4.8 Regression] Different results between O2 and O2 -fpredictive-commoning

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62031

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 26 13:15:16 2014
New Revision: 218079

URL: https://gcc.gnu.org/viewcvs?rev=218079&root=gcc&view=rev
Log:
2014-11-26  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2014-10-08  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/61969
    * tree-nrv.c (pass_nrv::execute): Properly test for automatic
    variables.

    2014-08-15  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/62031
    * tree-data-ref.c (dr_analyze_indices): Do not set
    DR_UNCONSTRAINED_BASE.
    (dr_may_alias_p): All indirect accesses have to go the
    formerly DR_UNCONSTRAINED_BASE path.
    * tree-data-ref.h (struct indices): Remove
    unconstrained_base member.
    (DR_UNCONSTRAINED_BASE): Remove.

    * gcc.dg/torture/pr62031.c: New testcase.

    2014-10-10  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/63379
    * tree-vect-slp.c (vect_get_constant_vectors): Do not compute
    a neutral operand for min/max when it is not a reduction chain.

    * gcc.dg/vect/pr63379.c: New testcase.

    2014-11-07  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/63605
    * fold-const.c (fold_binary_loc): Properly use element_precision
    for types that may not be scalar.

    * gcc.dg/vect/pr63605.c: New testcase.

    2014-10-28  Richard Biener  <rguenther@suse.de>

    PR middle-end/63665
    * fold-const.c (fold_comparison): Properly guard simplifying
    against INT_MAX/INT_MIN with !TYPE_OVERFLOW_WRAPS.

    * gcc.dg/pr63665.c: New testcase.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr63665.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr62031.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/vect/pr63379.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/vect/pr63605.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/fold-const.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-data-ref.c
    branches/gcc-4_8-branch/gcc/tree-data-ref.h
    branches/gcc-4_8-branch/gcc/tree-nrv.c
    branches/gcc-4_8-branch/gcc/tree-vect-slp.c