[LLVMdev] IPA based pass

[Tehila Mayzels]

Hi,

 

I'm trying to write a pass that deals with the whole program, and should be
based on the CallGraph information.

I understand that the way of doing that is inherit from CallGraphSCCPass. Is
that correct?

In addition, I would like to know:

1.       I read that this pass works bottom-up. Is there a pass that works
top-down? 

2.       How do I get the Module and the Context in runOnSCC function? I
need them in order to insert new function calls into existing functions?
What's the meaning of Module and Context exactly?

 

Thanks a lot in advance,

Tehila.

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