[llvm-commits] [llvm] r108109 - /llvm/trunk/lib/CodeGen/MachineLICM.cpp

[Chris Lattner]

On Jul 12, 2010, at 4:53 PM, Evan Cheng wrote:

>> I can't imagine why we would want to keep IMPLICIT_DEFs around, but I can imagine ProcessImplicitDefs getting confused because the code is not SSA.
>> 
>> 
> 
> 
> RA, or rather ProcessImplicitDef pass, turn them into trivial short live ranges when it's possible. But it does miss some cases. It's relatively rare but it does happen.

I don't think that LICM should be complicated by a deficiency handling implicit defs.

-Chris