[Bug target/48227] "rep ret" generated for -march=core2

[zuxy.meng at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48227

--- Comment #3 from Zuxy <zuxy.meng at gmail dot com> 2011-04-06 13:42:21 UTC ---
(In reply to comment #1)
> A good question is does it make a difference in actual performance numbers, it
> might still make a positive difference.  Until someone tries it out and sees
> the difference in performance, I am going to say we should keep it.

Actually GCC since 4.6 has stopped generating 'rep ret' for all Intel CPUs.