C++ (Cpp) MachineInstrBuilder::cloneMemRefs Examples

Example #1

File: HexagonEarlyIfConv.cpp Project: FreeBSDFoundation/freebsd

void HexagonEarlyIfConversion::predicateInstr(MachineBasicBlock *ToB,
      MachineBasicBlock::iterator At, MachineInstr *MI,
      unsigned PredR, bool IfTrue) {
  DebugLoc DL;
  if (At != ToB->end())
    DL = At->getDebugLoc();
  else if (!ToB->empty())
    DL = ToB->back().getDebugLoc();

  unsigned Opc = MI->getOpcode();

  if (isPredicableStore(MI)) {
    unsigned COpc = getCondStoreOpcode(Opc, IfTrue);
    assert(COpc);
    MachineInstrBuilder MIB = BuildMI(*ToB, At, DL, HII->get(COpc));
    MachineInstr::mop_iterator MOI = MI->operands_begin();
    if (HII->isPostIncrement(*MI)) {
      MIB.add(*MOI);
      ++MOI;
    }
    MIB.addReg(PredR);
    for (const MachineOperand &MO : make_range(MOI, MI->operands_end()))
      MIB.add(MO);

    // Set memory references.
    MIB.cloneMemRefs(*MI);

    MI->eraseFromParent();
    return;
  }

  if (Opc == Hexagon::J2_jump) {
    MachineBasicBlock *TB = MI->getOperand(0).getMBB();
    const MCInstrDesc &D = HII->get(IfTrue ? Hexagon::J2_jumpt
                                           : Hexagon::J2_jumpf);
    BuildMI(*ToB, At, DL, D)
      .addReg(PredR)
      .addMBB(TB);
    MI->eraseFromParent();
    return;
  }

  // Print the offending instruction unconditionally as we are about to
  // abort.
  dbgs() << *MI;
  llvm_unreachable("Unexpected instruction");
}