[Bug tree-optimization/71518] [6 Regression] wrong code at -O3 on x86_64-linux-gnu in 64-bit mode (not in 32-bit mode)

[ienkovich at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71518

--- Comment #4 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Mon Jul 11 15:21:20 2016
New Revision: 238212

URL: https://gcc.gnu.org/viewcvs?rev=238212&root=gcc&view=rev
Log:
2016-07-11  Yuri Rumyantsev  <ysrumyan@gmail.com>

        Backport from mainline r238055.
        2016-07-06  Yuri Rumyantsev  <ysrumyan@gmail.com>

        PR tree-optimization/71518
        * tree-vect-data-refs.c (vect_compute_data_ref_alignment): Adjust
        misalign also for outer loops with negative step.

gcc/testsuite/

2016-07-11  Yuri Rumyantsev  <ysrumyan@gmail.com>

        Backport from mainline r238055.
        2016-07-06  Yuri Rumyantsev  <ysrumyan@gmail.com>

        PR tree-optimization/71518
        * gcc.dg/pr71518.c: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/gcc.dg/pr71518.c
Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/testsuite/ChangeLog
    branches/gcc-6-branch/gcc/tree-vect-data-refs.c