[llvm-commits] CVS: llvm/lib/Analysis/ScalarEvolution.cpp ScalarEvolutionExpander.cpp

[Dan Gohman]

> Nifty.  Have you done any performance analysis of this?  What cases
> is it beneficial for?  If this helps LSR, for example, can you please
> add a testcase to verify this doesn't break in the future?

It doesn't actually help LSR much. At this point, a signextend isn't
much less opaque than an unknown, though hasComputableLoopEvolution 
works.

Dan

-- 
Dan Gohman, Cray Inc.