[LLVMdev] First time!

[Chris Lattner]

On Thu, 20 Dec 2007, aditya vishnubhotla wrote:
> I want to know
> How to count the number of predecessors for each basic
> block?

Use:

#include "llvm/Support/CFG.h"

   for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++I) {
     BasicBlock *PredBB = *PI;
     ..
   }

to walk basic block predecessors.  Similarly, use succ_* for successors.

You might find this section useful:
http://llvm.org/docs/ProgrammersManual.html#common

-Chris

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