[Bug tree-optimization/53773] Vectorizer generates non-canonical multiplies

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53773

--- Comment #7 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2012-07-31 12:25:10 UTC ---
Author: wschmidt
Date: Tue Jul 31 12:25:04 2012
New Revision: 190007

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190007
Log:
gcc:

2012-07-31  Bill Schmidt  <wschmidt@linux.ibm.com>

    PR tree-optimization/53773
    * tree-vectorizer.h (struct _loop_vec_info): Add operands_swapped.
    (LOOP_VINFO_OPERANDS_SWAPPED): New macro.
    * tree-vect-loop.c (new_loop_vec_info): Initialize
    LOOP_VINFO_OPERANDS_SWAPPED field.
    (destroy_loop_vec_info): Restore canonical form.
    (vect_is_slp_reduction): Set LOOP_VINFO_OPERANDS_SWAPPED field.
    (vect_is_simple_reduction_1): Likewise.

gcc/testsuite:

2012-07-31  Bill Schmidt  <wschmidt@linux.ibm.com>

    PR tree-optimization/53773
    * testsuite/gcc.dg/vect/pr53773.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/vect/pr53773.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-loop.c
    trunk/gcc/tree-vectorizer.h