CodeGen/GlobalISel/Utils.cpp

228                             &MRI](const MachineInstr &MI) -> Optional<APInt> {
236       APInt Val = CstVal.isImm() ? APInt(BitWidth, CstVal.getImm())
270   Optional<APInt> MaybeVal = GetImmediateValue(*MI);
273   APInt &Val = *MaybeVal;
338 Optional<APInt> llvm::ConstantFoldBinOp(unsigned Opcode, const unsigned Op1,
345     APInt C1(Ty.getSizeInBits(), *MaybeOp1Cst, true);
346     APInt C2(Ty.getSizeInBits(), *MaybeOp2Cst, true);
414 Optional<APInt> llvm::ConstantFoldExtOp(unsigned Opcode, const unsigned Op1,
420     APInt C1(Ty.getSizeInBits(), *MaybeOp1Cst, true);