[llvm-commits] [llvm] r169182 - in /llvm/trunk: lib/Transforms/InstCombine/InstCombine.h lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp test/Transforms/InstCombine/2010-11-01-lshr-mask.ll test/Transforms/InstCombine/shift.ll test/Transforms/InstCombine/signext.ll

[Shuxin Yang]

Oops, I miss one thing,  when X >> c1 << c2 => X >> (c1 - c2), the type 
of shift-right should remain unchanged.
I will fix right now.

> I see, re-reading your comments above SimplifyDemandedUseBits I can see what the checks are.
>
>