[Bug c/50693] Slightly different loop body leads to 5.5x slower performance

[alex.gaynor at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50693

--- Comment #1 from Alex Gaynor <alex.gaynor at gmail dot com> 2011-10-10 
22:52:07 UTC ---
It may be interesting to note that clang (version 2.9) does not exhibit this
performance difference, but versions execute quickly.