[LLVMdev] Help with pass registration

[Fernando Magno Quintao Pereira]

> >    I have updated my LLVM to the top of CVS, and now I am getting
> > errors like this one below when I write new passes:
>
> What does your getAnalysisUsage method look like?
>

Chris,

    I think I've figured the problem out. I have a very basic question
though. What is the difference between addRequired, and addRequiredID?
For instance, in RegAllocLocal.cpp, you have both:

AU.addRequired<LiveVariables>();
AU.addRequiredID(PHIEliminationID);

    When should I use one, and when the other should be used?

Thanks a lot,

Fernando