Lines Matching defs:AH

4181   // Don't interfere with something that can be handled by extracting AH.
4182   // TODO: If we are able to fold a load, BEXTR might still be better than AH.
5907       LoReg = X86::AL;  ClrReg = HiReg = X86::AH;
5932       // clear the upper 8 bits (AH).
6010     // Prevent use of AH in a REX instruction by explicitly copying it to
6017     if (HiReg == X86::AH && !SDValue(Node, 1).use_empty()) {
6018       SDValue AHCopy = CurDAG->getRegister(X86::AH, MVT::i8);
6106     // Move AH into flags.
6110     SDValue AH = CurDAG->getCopyToReg(Chain, dl, X86::AH, Extract, SDValue());
6111     Chain = AH;
6113         CurDAG->getMachineNode(X86::SAHF, dl, MVT::i32, AH.getValue(1)), 0);