[Bug tree-optimization/58228] [4.7/4.8 Regression] wrong code (with vectorization?) at -O3 on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58228

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Sep  3 12:16:28 2013
New Revision: 202216

URL: http://gcc.gnu.org/viewcvs?rev=202216&root=gcc&view=rev
Log:
2013-09-03  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2013-08-30  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/58228
    * tree-vect-data-refs.c (vect_analyze_data_ref_access): Do not
    allow invariant loads in nested loop vectorization.

    * gcc.dg/torture/pr58228.c: New testcase.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr58228.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-vect-data-refs.c