InstrRefBasedImpl.h

  LLVM_DUMP_METHOD
  void dump_mloc_transfer(const MLocTransferMap &mloc_transfer) const;

  bool isCalleeSaved(LocIdx L) const;

  bool hasFoldedStackStore(const MachineInstr &MI) {
    // Instruction must have a memory operand that's a stack slot, and isn't
    // aliased, meaning it's a spill from regalloc instead of a variable.
    // If it's aliased, we can't guarantee its value.
    if (!MI.hasOneMemOperand())
      return false;
    auto *MemOperand = *MI.memoperands_begin();
    return MemOperand->isStore() &&
           MemOperand->getPseudoValue() &&
           MemOperand->getPseudoValue()->kind() == PseudoSourceValue::FixedStack
           && !MemOperand->getPseudoValue()->isAliased(MFI);
  }

  Optional<LocIdx> findLocationForMemOperand(const MachineInstr &MI);
};

} // namespace LiveDebugValues

namespace llvm {
using namespace LiveDebugValues;

template <> struct DenseMapInfo<LocIdx> {
  static inline LocIdx getEmptyKey() { return LocIdx::MakeIllegalLoc(); }
  static inline LocIdx getTombstoneKey() { return LocIdx::MakeTombstoneLoc(); }

  static unsigned getHashValue(const LocIdx &Loc) { return Loc.asU64(); }

  static bool isEqual(const LocIdx &A, const LocIdx &B) { return A == B; }
};

template <> struct DenseMapInfo<ValueIDNum> {
  static inline ValueIDNum getEmptyKey() { return ValueIDNum::EmptyValue; }
  static inline ValueIDNum getTombstoneKey() {
    return ValueIDNum::TombstoneValue;
  }

  static unsigned getHashValue(const ValueIDNum &Val) { return Val.asU64(); }

  static bool isEqual(const ValueIDNum &A, const ValueIDNum &B) {
    return A == B;
  }
};

} // end namespace llvm

#endif /* LLVM_LIB_CODEGEN_LIVEDEBUGVALUES_INSTRREFBASEDLDV_H */