[Bug tree-optimization/52459] [x86] loop performance very bad (worse than -O0) when using sse4.2 popcnt

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52459

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[x86] loop vectorization    |[x86] loop performance very
                   |performance very bad (worse |bad (worse than -O0) when
                   |than -O0) when using sse4.2 |using sse4.2 popcnt
                   |popcnt                      |

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-03-02 07:19:49 UTC ---
This has nothing to do with the vectorizer but rather PPRE.