[LLVMdev] IR code modification/transformation

[Rinaldini Julien]

Hi,

I have a question about the llvm passes.

I'm iterating over a basicblock and I can get an instruction and print it.
Now, I want to iterate over the instruction and be able to modify the values of the instruction.

For example, if my instruction is an add "<result> = add i32 4, %var" I want to transform it in a sub "<result> = sub i32 4, %var".

I looked up on getOperands() and getAllMetadata() and some others methods, but none work.

Can you help me with that please?

Thx