[LLVMdev] How to change the type of an Instruction?

[Marius Wachtler]

Hello

I think you will just have to insert a truncation instruction...

For example:

   CastInst* V0 = new TruncInst(Op0, Type::getInt16Ty(Op0->getContext()));
   CastInst* V1 = new TruncInst(Op1, Type::getInt16Ty(Op0->getContext()));
   BinaryOperator* newInst = BinaryOperator::CreateNSWAdd(V0, V1, "test");

I find the online demo on llvm.org helpful for this sort of questions
(Show LLVM C++ API code).

Hope this Helps

-- Marius Wachtler