[Bug tree-optimization/48172] [4.5/4.6/4.7 Regression] incorrect vectorization of loop in GCC 4.5.* with -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48172

--- Comment #14 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-05-13 
08:31:28 UTC ---
Author: rguenth
Date: Fri May 13 08:31:18 2011
New Revision: 173725

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173725
Log:
2011-05-13  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/48172
    * tree-vect-loop-manip.c (vect_vfa_segment_size): Avoid
    multiplying by number of iterations for equal step.
    (vect_create_cond_for_alias_checks): Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-vect-loop-manip.c