[Bug tree-optimization/52571] vectorizer changes alignment of common symbols

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52571

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-14 13:00:49 UTC ---
Author: rguenth
Date: Wed Mar 14 13:00:44 2012
New Revision: 185380

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185380
Log:
2012-03-14  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/52571
    * tree-vect-data-refs.c (vect_compute_data_ref_alignment): Move
    flag_section_anchors check ...
    (vect_can_force_dr_alignment_p): ... here.  Do not re-align
    DECL_COMMON variables.

    * gcc.dg/vect/vect-2.c: Initialize arrays.
    * gcc.dg/vect/no-section-anchors-vect-34.c: Likewise.
    * gcc.target/i386/recip-vec-divf.c: Use -fno-common.
    * gcc.target/i386/recip-vec-sqrtf.c: Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vect/no-section-anchors-vect-34.c
    trunk/gcc/testsuite/gcc.dg/vect/vect-2.c
    trunk/gcc/testsuite/gcc.target/i386/recip-vec-divf.c
    trunk/gcc/testsuite/gcc.target/i386/recip-vec-sqrtf.c
    trunk/gcc/tree-vect-data-refs.c