[Bug tree-optimization/59354] [4.8/4.9 Regression] Element swizzling produces invalid result with -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59354

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Feb 23 11:14:25 2015
New Revision: 220912

URL: https://gcc.gnu.org/viewcvs?rev=220912&root=gcc&view=rev
Log:
2015-02-23  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2014-11-19  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/63844
    * omp-low.c (fixup_child_record_type): Use a restrict qualified
    referece type for the receiver parameter.

    2014-11-27  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/61634
    * tree-vect-slp.c: Include gimple-walk.h.
    (vect_detect_hybrid_slp_stmts): Rewrite to propagate hybrid
    down the SLP tree for one scalar statement.
    (vect_detect_hybrid_slp_1): New walker function.
    (vect_detect_hybrid_slp_2): Likewise.
    (vect_detect_hybrid_slp): Properly handle pattern statements
    in a pre-scan over all loop stmts.

    * gcc.dg/vect/pr61634.c: New testcase.

    2015-01-14  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/59354
    * tree-vect-slp.c (vect_build_slp_tree_1): Treat loads from
    groups larger than the slp group size as having gaps.

    * gcc.dg/vect/pr59354.c: New testcase.

    2015-02-10  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/64909
    * tree-vect-loop.c (vect_estimate_min_profitable_iters): Properly
    pass a scalar-stmt count estimate to the cost model.
    * tree-vect-data-refs.c (vect_peeling_hash_get_lowest_cost): Likewise.

    * gcc.dg/vect/costmodel/x86_64/costmodel-pr64909.c: New testcase.

Added:
   
branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-pr64909.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/vect/pr59354.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/vect/pr61634.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/omp-low.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_9-branch/gcc/tree-vect-data-refs.c
    branches/gcc-4_9-branch/gcc/tree-vect-loop.c
    branches/gcc-4_9-branch/gcc/tree-vect-slp.c