[llvm-dev] Finding live values

[Rob Lyerly via llvm-dev]

Hi everyone,

I'm writing a pass that inserts the llvm.experimental.stackmap intrinsic
into the IR, and I'd like to record the locations of *all* live values
whenever I insert the intrinsic (all this entails is adding values as
arguments to the intrinsic).  Is there any pre-existing analysis pass which
can give me the live values at a given instruction in a basic block?  Or do
I need to write an analysis pass to calculate this information?

I realize that live value analysis is usually performed during register
allocation in the backend, but I was wondering if there was anything
available in the optimizer.


-- 
Rob Lyerly
Graduate Research Assistant, Systems Software Research Group
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