[LLVMdev] Control dependence pass

[funceval]

Hi,

I have written a pass to find the control dependences. Right now I am
using a map of of basic blocks to vectors of basic blocks to store the
dependences, so the dependence is represented in terms of basic
blocks. Before I submit the patch for review, I wanted to know the
format in which control dependences should be stored.

1) Should the dependence information be instead represented in terms
of instructions? This is how I plan to do in terms of instructions -
if basic block bb1 is control dependent on basic block bb2, then all
instructions in bb1 are dependent on the compare instruction in bb2.
2) Shall I provide an additional wrapper class to get the dependence
information in terms of instructions?
3) Is the STL map good enough for storing and retrieving the
dependence information?

Thanks