[Bug middle-end/17886] variable rotate and unsigned long long rotate should be better optimized

[andi-gcc at firstfloor dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17886

--- Comment #25 from Andi Kleen <andi-gcc at firstfloor dot org> 2013-01-14 22:32:59 UTC ---
Also i need to look more closely, but most likely the C++ atomic code should be
changed to avoid this situation. This would give much better code on x86 in any
case even without elision.