[Bug target/55953] hand loop faster then builtin memset

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55953

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

           What    |Removed                     |Added
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             Target|                            |x86_64-*-*
          Component|c                           |target

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-01-11 23:35:53 UTC ---
This is a target issue.  The first function uses the AVX/SSE registers while
the second only uses the integer registers.  So the target decides not to
vectorize memset but only use the integer registers.