C++ (Cpp) MachineOperand::ChangeToImmediate Examples

Example #1

File: HexagonPeephole.cpp Project: sigma-random/llvm

void HexagonPeephole::ChangeOpInto(MachineOperand &Dst, MachineOperand &Src) {
  assert (&Dst != &Src && "Cannot duplicate into itself");
  switch (Dst.getType()) {
    case MachineOperand::MO_Register:
      if (Src.isReg()) {
        Dst.setReg(Src.getReg());
      } else if (Src.isImm()) {
        Dst.ChangeToImmediate(Src.getImm());
      } else {
        llvm_unreachable("Unexpected src operand type");
      }
      break;

    case MachineOperand::MO_Immediate:
      if (Src.isImm()) {
        Dst.setImm(Src.getImm());
      } else if (Src.isReg()) {
        Dst.ChangeToRegister(Src.getReg(), Src.isDef(), Src.isImplicit(),
                             Src.isKill(), Src.isDead(), Src.isUndef(),
                             Src.isDebug());
      } else {
        llvm_unreachable("Unexpected src operand type");
      }
      break;

    default:
      llvm_unreachable("Unexpected dst operand type");
      break;
  }
}

Example #2

File: NVPTXReplaceImageHandles.cpp Project: ADonut/LLVM-GPGPU

void NVPTXReplaceImageHandles::
replaceImageHandle(MachineOperand &Op, MachineFunction &MF) {
  const MachineRegisterInfo &MRI = MF.getRegInfo();
  NVPTXMachineFunctionInfo *MFI = MF.getInfo<NVPTXMachineFunctionInfo>();
  // Which instruction defines the handle?
  MachineInstr *MI = MRI.getVRegDef(Op.getReg());
  assert(MI && "No def for image handle vreg?");
  MachineInstr &TexHandleDef = *MI;

  switch (TexHandleDef.getOpcode()) {
  case NVPTX::LD_i64_avar: {
    // The handle is a parameter value being loaded, replace with the
    // parameter symbol
    assert(TexHandleDef.getOperand(6).isSymbol() && "Load is not a symbol!");
    StringRef Sym = TexHandleDef.getOperand(6).getSymbolName();
    std::string ParamBaseName = MF.getName();
    ParamBaseName += "_param_";
    assert(Sym.startswith(ParamBaseName) && "Invalid symbol reference");
    unsigned Param = atoi(Sym.data()+ParamBaseName.size());
    std::string NewSym;
    raw_string_ostream NewSymStr(NewSym);
    NewSymStr << MF.getFunction()->getName() << "_param_" << Param;
    Op.ChangeToImmediate(
      MFI->getImageHandleSymbolIndex(NewSymStr.str().c_str()));
    InstrsToRemove.insert(&TexHandleDef);
    break;
  }
  case NVPTX::texsurf_handles: {
    // The handle is a global variable, replace with the global variable name
    assert(TexHandleDef.getOperand(1).isGlobal() && "Load is not a global!");
    const GlobalValue *GV = TexHandleDef.getOperand(1).getGlobal();
    assert(GV->hasName() && "Global sampler must be named!");
    Op.ChangeToImmediate(MFI->getImageHandleSymbolIndex(GV->getName().data()));
    InstrsToRemove.insert(&TexHandleDef);
    break;
  }
  default:
    llvm_unreachable("Unknown instruction operating on handle");
  }
}