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...f I add the BB->getInstList().push_back() following new CallInst(), I got error information when runing opt. What is the reason for it? And is it necessary to add push_back() after new CallInst ? And if I used those two instructions , it works well. Thanks Instruction *InstrCall = new CallInst (InstrFn, Args , ""); BB->getInstList().insert(InsertPos,InstrCall); Error inforamtion: %opt -load ../../lib/Debug/libcntPass.so -cntPass<insert.bc -f -o i.bc BB name : entry opt: SymbolTableListTraitsImpl.h:53: void llvm::SymbolTableListTraits<ValueSubClass, ItemParentClass, SymTa...

Hi , I am using LLVM for my Post Graduate course project on Optimization. I am trying to do some insrtumentation to the bytecode.I 've been going through your Instrumentation code for the past few days in /llvm/lib/Transforms/Instrumentation folder and finally found two ways of instrumentation : 1) injecting LLVM bytecode instructions 2) calling an external C function. I am trying both and