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📄 ConstantPools.h(3.35 KB)
📄 LaneBitmask.h(3.24 KB)
📄 MCAsmBackend.h(8.09 KB)
📄 MCAsmInfo.h(25.48 KB)
📄 MCAsmInfoCOFF.h(900 B)
📄 MCAsmInfoDarwin.h(927 B)
📄 MCAsmInfoELF.h(711 B)
📄 MCAsmInfoWasm.h(612 B)
📄 MCAsmInfoXCOFF.h(792 B)
📄 MCAsmLayout.h(3.75 KB)
📄 MCAsmMacro.h(4.54 KB)
📄 MCAssembler.h(16.1 KB)
📄 MCCodeEmitter.h(1.53 KB)
📄 MCCodeView.h(9.03 KB)
📄 MCContext.h(31.99 KB)
📄 MCDirectives.h(3.12 KB)
📁 MCDisassembler
📄 MCDwarf.h(21.46 KB)
📄 MCELFObjectWriter.h(5.27 KB)
📄 MCELFStreamer.h(3.97 KB)
📄 MCExpr.h(21.55 KB)
📄 MCFixedLenDisassembler.h(1.39 KB)
📄 MCFixup.h(7.4 KB)
📄 MCFixupKindInfo.h(1.6 KB)
📄 MCFragment.h(17.72 KB)
📄 MCInst.h(6.06 KB)
📄 MCInstBuilder.h(1.76 KB)
📄 MCInstPrinter.h(5.88 KB)
📄 MCInstrAnalysis.h(6.8 KB)
📄 MCInstrDesc.h(25.13 KB)
📄 MCInstrInfo.h(2.93 KB)
📄 MCInstrItineraries.h(9.02 KB)
📄 MCLabel.h(1.63 KB)
📄 MCLinkerOptimizationHint.h(5.73 KB)
📄 MCMachObjectWriter.h(9.77 KB)
📄 MCObjectFileInfo.h(16.57 KB)
📄 MCObjectStreamer.h(8.78 KB)
📄 MCObjectWriter.h(4.44 KB)
📁 MCParser
📄 MCRegister.h(4.16 KB)
📄 MCRegisterInfo.h(28.96 KB)
📄 MCSchedule.h(16.25 KB)
📄 MCSection.h(6.52 KB)
📄 MCSectionCOFF.h(3.37 KB)
📄 MCSectionELF.h(3.3 KB)
📄 MCSectionMachO.h(3.15 KB)
📄 MCSectionWasm.h(2.78 KB)
📄 MCSectionXCOFF.h(3.22 KB)
📄 MCStreamer.h(43.55 KB)
📄 MCSubtargetInfo.h(10.04 KB)
📄 MCSymbol.h(13.8 KB)
📄 MCSymbolCOFF.h(1.62 KB)
📄 MCSymbolELF.h(1.45 KB)
📄 MCSymbolMachO.h(4.18 KB)
📄 MCSymbolWasm.h(4.28 KB)
📄 MCSymbolXCOFF.h(2.39 KB)
📄 MCTargetOptions.h(2.29 KB)
📄 MCTargetOptionsCommandFlags.h(1.26 KB)
📄 MCValue.h(2.42 KB)
📄 MCWasmObjectWriter.h(1.61 KB)
📄 MCWasmStreamer.h(2.83 KB)
📄 MCWin64EH.h(2.41 KB)
📄 MCWinCOFFObjectWriter.h(1.81 KB)
📄 MCWinCOFFStreamer.h(3.05 KB)
📄 MCWinEH.h(1.97 KB)
📄 MCXCOFFObjectWriter.h(1.45 KB)
📄 MCXCOFFStreamer.h(1.86 KB)
📄 MachineLocation.h(2.04 KB)
📄 SectionKind.h(7.53 KB)
📄 StringTableBuilder.h(2.47 KB)
📄 SubtargetFeature.h(7.12 KB)

Editing: MCRegister.h

//===-- llvm/MC/Register.h --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_MC_REGISTER_H
#define LLVM_MC_REGISTER_H

#include "llvm/ADT/DenseMapInfo.h"
#include <cassert>

namespace llvm {

/// An unsigned integer type large enough to represent all physical registers,
/// but not necessarily virtual registers.
using MCPhysReg = uint16_t;

/// Wrapper class representing physical registers. Should be passed by value.
class MCRegister {
  unsigned Reg;

public:
  constexpr MCRegister(unsigned Val = 0): Reg(Val) {}

// Register numbers can represent physical registers, virtual registers, and
  // sometimes stack slots. The unsigned values are divided into these ranges:
  //
  //   0           Not a register, can be used as a sentinel.
  //   [1;2^30)    Physical registers assigned by TableGen.
  //   [2^30;2^31) Stack slots. (Rarely used.)
  //   [2^31;2^32) Virtual registers assigned by MachineRegisterInfo.
  //
  // Further sentinels can be allocated from the small negative integers.
  // DenseMapInfo<unsigned> uses -1u and -2u.
  static_assert(std::numeric_limits<decltype(Reg)>::max() >= 0xFFFFFFFF,
                "Reg isn't large enough to hold full range.");
  static constexpr unsigned NoRegister = 0u;
  static constexpr unsigned FirstPhysicalReg = 1u;
  static constexpr unsigned FirstStackSlot = 1u << 30;
  static constexpr unsigned VirtualRegFlag = 1u << 31;

/// This is the portion of the positive number space that is not a physical
  /// register. StackSlot values do not exist in the MC layer, see
  /// Register::isStackSlot() for the more information on them.
  ///
  /// Note that isVirtualRegister() and isPhysicalRegister() cannot handle stack
  /// slots, so if a variable may contains a stack slot, always check
  /// isStackSlot() first.
  static bool isStackSlot(unsigned Reg) {
    return !(Reg & VirtualRegFlag) &&
           uint32_t(Reg & ~VirtualRegFlag) >= FirstStackSlot;
  }

/// Return true if the specified register number is in
  /// the physical register namespace.
  static bool isPhysicalRegister(unsigned Reg) {
    assert(!isStackSlot(Reg) && "Not a register! Check isStackSlot() first.");
    return Reg >= FirstPhysicalReg && !(Reg & VirtualRegFlag);
  }

/// Return true if the specified register number is in the physical register
  /// namespace.
  bool isPhysical() const {
    return isPhysicalRegister(Reg);
  }

constexpr operator unsigned() const {
    return Reg;
  }

unsigned id() const {
    return Reg;
  }

bool isValid() const { return Reg != NoRegister; }

/// Comparisons between register objects
  bool operator==(const MCRegister &Other) const { return Reg == Other.Reg; }
  bool operator!=(const MCRegister &Other) const { return Reg != Other.Reg; }

/// Comparisons against register constants. E.g.
  /// * R == AArch64::WZR
  /// * R == 0
  /// * R == VirtRegMap::NO_PHYS_REG
  bool operator==(unsigned Other) const { return Reg == Other; }
  bool operator!=(unsigned Other) const { return Reg != Other; }
  bool operator==(int Other) const { return Reg == unsigned(Other); }
  bool operator!=(int Other) const { return Reg != unsigned(Other); }
  // MSVC requires that we explicitly declare these two as well.
  bool operator==(MCPhysReg Other) const { return Reg == unsigned(Other); }
  bool operator!=(MCPhysReg Other) const { return Reg != unsigned(Other); }
};

// Provide DenseMapInfo for MCRegister
template<> struct DenseMapInfo<MCRegister> {
  static inline unsigned getEmptyKey() {
    return DenseMapInfo<unsigned>::getEmptyKey();
  }
  static inline unsigned getTombstoneKey() {
    return DenseMapInfo<unsigned>::getTombstoneKey();
  }
  static unsigned getHashValue(const MCRegister &Val) {
    return DenseMapInfo<unsigned>::getHashValue(Val.id());
  }
  static bool isEqual(const MCRegister &LHS, const MCRegister &RHS) {
    return DenseMapInfo<unsigned>::isEqual(LHS.id(), RHS.id());
  }
};

}

#endif // ifndef LLVM_MC_REGISTER_H

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Editing: MCRegister.h

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