[LLVMdev] Uniform data dependence info?

[Chris Lattner]

> Is there some uniform way to find data dependence between two (sets of) 
> instructions?  There is use/def data, and there is AliasAnalysis 
> information, but I am looking for something more high-level and uniform. 
> I guess I am missing then was abandoned. Any ideas?

Nope, there currently isn't a uniform interface for doing so, at least not 
at the LLVM level.  As you said, use/def information will tell you about 
dependence between non-side-effecting instructions, and AliasAnalysis will 
tell you what dependences exist between side-effecting ones.

What are you trying to do here?  It would be really easy to add a helper 
method to the AliasAnalysis interface that took into consideration 
dependencies between scalar instructions.  What specific information do 
you need?

-Chris

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