C++ (Cpp) CallInst::removeFromParent示例

  void visitCallInst(CallInst &I) {
    string intrinsic = I.getCalledFunction()->getName().str();

    if(intrinsic.find("modmul") != -1) {

      CallInst *enterMontpro1 = enterMontgomery(I.getOperand(0), I.getOperand(2), &I);
      CallInst *enterMontpro2 = enterMontgomery(I.getOperand(1), I.getOperand(2), &I);
      CallInst *mulMontpro = mulMontgomery(I.getName().str(), enterMontpro1, enterMontpro2, I.getOperand(2), &I);
      CallInst *exitMontpro = leaveMontgomery(mulMontpro, I.getOperand(2), &I);

      I.replaceAllUsesWith(exitMontpro);

      I.removeFromParent();
    } else if(intrinsic.find("modexp") != -1) {
      
      CallInst *enterMontpro1 = enterMontgomery(I.getOperand(0), I.getOperand(2), &I);
      CallInst *expMontpro = expMontgomery(I.getName().str(), enterMontpro1, I.getOperand(1), I.getOperand(2), &I);
      CallInst *exitMontpro = leaveMontgomery(expMontpro, I.getOperand(2), &I);

      I.replaceAllUsesWith(exitMontpro);

      I.eraseFromParent();
    }
  }