[Bug tree-optimization/69297] [6 Regression] Performance regression after r230020

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69297

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jan 18 14:25:56 2016
New Revision: 232519

URL: https://gcc.gnu.org/viewcvs?rev=232519&root=gcc&view=rev
Log:
2016-01-18  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/69297
        * tree-vect-slp.c (vect_bb_slp_scalar_cost): Count each scalar
        stmt at most once.
        (vect_bb_vectorization_profitable_p): Clear visited flag again.

        * gcc.dg/vect/costmodel/x86_64/costmodel-pr69297.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/costmodel/x86_64/costmodel-pr69297.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-slp.c