[Bug tree-optimization/53970] -ftree-vectorization does not handle well unaligned data

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53970

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-18 
10:46:11 UTC ---
Author: rguenth
Date: Wed Jul 18 10:46:05 2012
New Revision: 189609

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189609
Log:
2012-07-18  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/53970
    * tree.h (contains_packed_reference): Remove.
    * expr.c (contains_packed_reference): Likewise.
    * tree-vect-data-refs.c (not_size_aligned): New function.
    (vector_alignment_reachable_p): Use it.
    (vect_supportable_dr_alignment): Likewise.

    * g++.dg/torture/pr53970.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr53970.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expr.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-data-refs.c
    trunk/gcc/tree.h