- if (TruncInst *TI = dyn_cast<TruncInst>(II->getArgOperand(0))) {
- if (IntrinsicInst *Operand = dyn_cast<IntrinsicInst>(TI->getOperand(0)))
- if (Operand->getIntrinsicID() == Intrinsic::bswap) {
- unsigned C = Operand->getType()->getPrimitiveSizeInBits() -
- TI->getType()->getPrimitiveSizeInBits();
- Value *CV = ConstantInt::get(Operand->getType(), C);
- Value *V = Builder->CreateLShr(Operand->getArgOperand(0), CV);
- return new TruncInst(V, TI->getType());
- }
+ if (match(IIOperand, m_Trunc(m_BSwap(m_Value(X))))) {
+ unsigned C = X->getType()->getPrimitiveSizeInBits() -
+ IIOperand->getType()->getPrimitiveSizeInBits();
+ Value *CV = ConstantInt::get(X->getType(), C);
+ Value *V = Builder->CreateLShr(X, CV);
+ return new TruncInst(V, IIOperand->getType());