How to check if instruction is a PHI instruction in LLVM IR

问题

I am writing an LLVM pass. For an instruction (llvm::Instruction Class), how can I check if an instruction is a PHI instruction?

回答1:

I found the solution. You can check for a PHI node like this, isa<PHINode>(inst).

回答2:

    Instruction* I;

    if(I->getOpcode()==Instruction::PHI){
    //code
    }

来源：https://stackoverflow.com/questions/9470505/how-to-check-if-instruction-is-a-phi-instruction-in-llvm-ir