Optimising std::find on x86 and PPC

[Paolo Carlini]

Paolo Carlini wrote:

> Hi Theodore and thanks for the interesting analysis.

I would like to add, that both gcc3.3.3 and other compilers are 
definitely able to unroll the loop at issue, therefore I'm tempted to 
consider the current behavior just a serious (performance) regression 
(i.e., correctness vs aliasing and other subtleties should not be in the 
way)

Paolo.