/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp

Bug Summary

File:	build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
Warning:	line 6348, column 34 Called C++ object pointer is null
Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name AArch64AsmParser.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-15/lib/clang/15.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I lib/Target/AArch64/AsmParser -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/AArch64/AsmParser -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/AArch64 -I lib/Target/AArch64 -I include -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/include -I lib/Target/AArch64/AsmParser/.. -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/AArch64/AsmParser/.. -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-15/lib/clang/15.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/= -ferror-limit 19 -fvisibility hidden -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2022-04-20-140412-16051-1 -x c++ /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
1//==- AArch64AsmParser.cpp - Parse AArch64 assembly to MCInst instructions -==//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//

9#include "AArch64InstrInfo.h"
10#include "MCTargetDesc/AArch64AddressingModes.h"
11#include "MCTargetDesc/AArch64InstPrinter.h"
12#include "MCTargetDesc/AArch64MCExpr.h"
13#include "MCTargetDesc/AArch64MCTargetDesc.h"
14#include "MCTargetDesc/AArch64TargetStreamer.h"
15#include "TargetInfo/AArch64TargetInfo.h"
16#include "Utils/AArch64BaseInfo.h"
17#include "llvm/ADT/APFloat.h"
18#include "llvm/ADT/APInt.h"
19#include "llvm/ADT/ArrayRef.h"
20#include "llvm/ADT/STLExtras.h"
21#include "llvm/ADT/SmallSet.h"
22#include "llvm/ADT/SmallVector.h"
23#include "llvm/ADT/StringExtras.h"
24#include "llvm/ADT/StringMap.h"
25#include "llvm/ADT/StringRef.h"
26#include "llvm/ADT/StringSwitch.h"
27#include "llvm/ADT/Twine.h"
28#include "llvm/MC/MCContext.h"
29#include "llvm/MC/MCExpr.h"
30#include "llvm/MC/MCInst.h"
31#include "llvm/MC/MCLinkerOptimizationHint.h"
32#include "llvm/MC/MCObjectFileInfo.h"
33#include "llvm/MC/MCParser/MCAsmLexer.h"
34#include "llvm/MC/MCParser/MCAsmParser.h"
35#include "llvm/MC/MCParser/MCAsmParserExtension.h"
36#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
37#include "llvm/MC/MCParser/MCTargetAsmParser.h"
38#include "llvm/MC/MCRegisterInfo.h"
39#include "llvm/MC/MCStreamer.h"
40#include "llvm/MC/MCSubtargetInfo.h"
41#include "llvm/MC/MCSymbol.h"
42#include "llvm/MC/MCTargetOptions.h"
43#include "llvm/MC/MCValue.h"
44#include "llvm/MC/SubtargetFeature.h"
45#include "llvm/MC/TargetRegistry.h"
46#include "llvm/Support/Casting.h"
47#include "llvm/Support/Compiler.h"
48#include "llvm/Support/ErrorHandling.h"
49#include "llvm/Support/MathExtras.h"
50#include "llvm/Support/SMLoc.h"
51#include "llvm/Support/AArch64TargetParser.h"
52#include "llvm/Support/TargetParser.h"
53#include "llvm/Support/raw_ostream.h"
54#include <cassert>
55#include <cctype>
56#include <cstdint>
57#include <cstdio>
58#include <string>
59#include <tuple>
60#include <utility>
61#include <vector>

63using namespace llvm;

65namespace {

67enum class RegKind {
Scalar,
NeonVector,
SVEDataVector,
SVEPredicateVector,
Matrix
73};

75enum class MatrixKind { Array, Tile, Row, Col };

77enum RegConstraintEqualityTy {
EqualsReg,
EqualsSuperReg,
EqualsSubReg
81};

83class AArch64AsmParser : public MCTargetAsmParser {
84private:
StringRef Mnemonic; ///< Instruction mnemonic.

// Map of register aliases registers via the .req directive.
StringMap<std::pair<RegKind, unsigned>> RegisterReqs;

class PrefixInfo {
public:
  static PrefixInfo CreateFromInst(const MCInst &Inst, uint64_t TSFlags) {
    PrefixInfo Prefix;
    switch (Inst.getOpcode()) {
    case AArch64::MOVPRFX_ZZ:
      Prefix.Active = true;
      Prefix.Dst = Inst.getOperand(0).getReg();
      break;
    case AArch64::MOVPRFX_ZPmZ_B:
    case AArch64::MOVPRFX_ZPmZ_H:
    case AArch64::MOVPRFX_ZPmZ_S:
    case AArch64::MOVPRFX_ZPmZ_D:
      Prefix.Active = true;
      Prefix.Predicated = true;
      Prefix.ElementSize = TSFlags & AArch64::ElementSizeMask;
      assert(Prefix.ElementSize != AArch64::ElementSizeNone &&(static_cast <bool> (Prefix.ElementSize != AArch64::ElementSizeNone
 && "No destructive element size set for movprfx") ? void
 (0) : __assert_fail ("Prefix.ElementSize != AArch64::ElementSizeNone && \"No destructive element size set for movprfx\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 107
, __extension__ __PRETTY_FUNCTION__))
             "No destructive element size set for movprfx")(static_cast <bool> (Prefix.ElementSize != AArch64::ElementSizeNone
 && "No destructive element size set for movprfx") ? void
 (0) : __assert_fail ("Prefix.ElementSize != AArch64::ElementSizeNone && \"No destructive element size set for movprfx\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 107
, __extension__ __PRETTY_FUNCTION__));
      Prefix.Dst = Inst.getOperand(0).getReg();
      Prefix.Pg = Inst.getOperand(2).getReg();
      break;
    case AArch64::MOVPRFX_ZPzZ_B:
    case AArch64::MOVPRFX_ZPzZ_H:
    case AArch64::MOVPRFX_ZPzZ_S:
    case AArch64::MOVPRFX_ZPzZ_D:
      Prefix.Active = true;
      Prefix.Predicated = true;
      Prefix.ElementSize = TSFlags & AArch64::ElementSizeMask;
      assert(Prefix.ElementSize != AArch64::ElementSizeNone &&(static_cast <bool> (Prefix.ElementSize != AArch64::ElementSizeNone
 && "No destructive element size set for movprfx") ? void
 (0) : __assert_fail ("Prefix.ElementSize != AArch64::ElementSizeNone && \"No destructive element size set for movprfx\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 119
, __extension__ __PRETTY_FUNCTION__))
             "No destructive element size set for movprfx")(static_cast <bool> (Prefix.ElementSize != AArch64::ElementSizeNone
 && "No destructive element size set for movprfx") ? void
 (0) : __assert_fail ("Prefix.ElementSize != AArch64::ElementSizeNone && \"No destructive element size set for movprfx\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 119
, __extension__ __PRETTY_FUNCTION__));
      Prefix.Dst = Inst.getOperand(0).getReg();
      Prefix.Pg = Inst.getOperand(1).getReg();
      break;
    default:
      break;
    }

    return Prefix;
  }

  PrefixInfo() : Active(false), Predicated(false) {}
  bool isActive() const { return Active; }
  bool isPredicated() const { return Predicated; }
  unsigned getElementSize() const {
    assert(Predicated)(static_cast <bool> (Predicated) ? void (0) : __assert_fail
 ("Predicated", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 134, __extension__ __PRETTY_FUNCTION__));
    return ElementSize;
  }
  unsigned getDstReg() const { return Dst; }
  unsigned getPgReg() const {
    assert(Predicated)(static_cast <bool> (Predicated) ? void (0) : __assert_fail
 ("Predicated", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 139, __extension__ __PRETTY_FUNCTION__));
    return Pg;
  }

private:
  bool Active;
  bool Predicated;
  unsigned ElementSize;
  unsigned Dst;
  unsigned Pg;
} NextPrefix;

AArch64TargetStreamer &getTargetStreamer() {
  MCTargetStreamer &TS = *getParser().getStreamer().getTargetStreamer();
  return static_cast<AArch64TargetStreamer &>(TS);
}

SMLoc getLoc() const { return getParser().getTok().getLoc(); }

bool parseSysAlias(StringRef Name, SMLoc NameLoc, OperandVector &Operands);
void createSysAlias(uint16_t Encoding, OperandVector &Operands, SMLoc S);
AArch64CC::CondCode parseCondCodeString(StringRef Cond,
                                        std::string &Suggestion);
bool parseCondCode(OperandVector &Operands, bool invertCondCode);
unsigned matchRegisterNameAlias(StringRef Name, RegKind Kind);
bool parseRegister(OperandVector &Operands);
bool parseSymbolicImmVal(const MCExpr *&ImmVal);
bool parseNeonVectorList(OperandVector &Operands);
bool parseOptionalMulOperand(OperandVector &Operands);
bool parseKeywordOperand(OperandVector &Operands);
bool parseOperand(OperandVector &Operands, bool isCondCode,
                  bool invertCondCode);
bool parseImmExpr(int64_t &Out);
bool parseComma();
bool parseRegisterInRange(unsigned &Out, unsigned Base, unsigned First,
                          unsigned Last);

bool showMatchError(SMLoc Loc, unsigned ErrCode, uint64_t ErrorInfo,
                    OperandVector &Operands);

bool parseDirectiveArch(SMLoc L);
bool parseDirectiveArchExtension(SMLoc L);
bool parseDirectiveCPU(SMLoc L);
bool parseDirectiveInst(SMLoc L);

bool parseDirectiveTLSDescCall(SMLoc L);

bool parseDirectiveLOH(StringRef LOH, SMLoc L);
bool parseDirectiveLtorg(SMLoc L);

bool parseDirectiveReq(StringRef Name, SMLoc L);
bool parseDirectiveUnreq(SMLoc L);
bool parseDirectiveCFINegateRAState();
bool parseDirectiveCFIBKeyFrame();

bool parseDirectiveVariantPCS(SMLoc L);

bool parseDirectiveSEHAllocStack(SMLoc L);
bool parseDirectiveSEHPrologEnd(SMLoc L);
bool parseDirectiveSEHSaveR19R20X(SMLoc L);
bool parseDirectiveSEHSaveFPLR(SMLoc L);
bool parseDirectiveSEHSaveFPLRX(SMLoc L);
bool parseDirectiveSEHSaveReg(SMLoc L);
bool parseDirectiveSEHSaveRegX(SMLoc L);
bool parseDirectiveSEHSaveRegP(SMLoc L);
bool parseDirectiveSEHSaveRegPX(SMLoc L);
bool parseDirectiveSEHSaveLRPair(SMLoc L);
bool parseDirectiveSEHSaveFReg(SMLoc L);
bool parseDirectiveSEHSaveFRegX(SMLoc L);
bool parseDirectiveSEHSaveFRegP(SMLoc L);
bool parseDirectiveSEHSaveFRegPX(SMLoc L);
bool parseDirectiveSEHSetFP(SMLoc L);
bool parseDirectiveSEHAddFP(SMLoc L);
bool parseDirectiveSEHNop(SMLoc L);
bool parseDirectiveSEHSaveNext(SMLoc L);
bool parseDirectiveSEHEpilogStart(SMLoc L);
bool parseDirectiveSEHEpilogEnd(SMLoc L);
bool parseDirectiveSEHTrapFrame(SMLoc L);
bool parseDirectiveSEHMachineFrame(SMLoc L);
bool parseDirectiveSEHContext(SMLoc L);
bool parseDirectiveSEHClearUnwoundToCall(SMLoc L);

bool validateInstruction(MCInst &Inst, SMLoc &IDLoc,
                         SmallVectorImpl<SMLoc> &Loc);
bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                             OperandVector &Operands, MCStreamer &Out,
                             uint64_t &ErrorInfo,
                             bool MatchingInlineAsm) override;
227/// @name Auto-generated Match Functions
228/// {

230#define GET_ASSEMBLER_HEADER
231#include "AArch64GenAsmMatcher.inc"

/// }

OperandMatchResultTy tryParseScalarRegister(unsigned &Reg);
OperandMatchResultTy tryParseVectorRegister(unsigned &Reg, StringRef &Kind,
                                            RegKind MatchKind);
OperandMatchResultTy tryParseMatrixRegister(OperandVector &Operands);
OperandMatchResultTy tryParseSVCR(OperandVector &Operands);
OperandMatchResultTy tryParseOptionalShiftExtend(OperandVector &Operands);
OperandMatchResultTy tryParseBarrierOperand(OperandVector &Operands);
OperandMatchResultTy tryParseBarriernXSOperand(OperandVector &Operands);
OperandMatchResultTy tryParseMRSSystemRegister(OperandVector &Operands);
OperandMatchResultTy tryParseSysReg(OperandVector &Operands);
OperandMatchResultTy tryParseSysCROperand(OperandVector &Operands);
template <bool IsSVEPrefetch = false>
OperandMatchResultTy tryParsePrefetch(OperandVector &Operands);
OperandMatchResultTy tryParsePSBHint(OperandVector &Operands);
OperandMatchResultTy tryParseBTIHint(OperandVector &Operands);
OperandMatchResultTy tryParseAdrpLabel(OperandVector &Operands);
OperandMatchResultTy tryParseAdrLabel(OperandVector &Operands);
template<bool AddFPZeroAsLiteral>
OperandMatchResultTy tryParseFPImm(OperandVector &Operands);
OperandMatchResultTy tryParseImmWithOptionalShift(OperandVector &Operands);
OperandMatchResultTy tryParseGPR64sp0Operand(OperandVector &Operands);
bool tryParseNeonVectorRegister(OperandVector &Operands);
OperandMatchResultTy tryParseVectorIndex(OperandVector &Operands);
OperandMatchResultTy tryParseGPRSeqPair(OperandVector &Operands);
template <bool ParseShiftExtend,
          RegConstraintEqualityTy EqTy = RegConstraintEqualityTy::EqualsReg>
OperandMatchResultTy tryParseGPROperand(OperandVector &Operands);
template <bool ParseShiftExtend, bool ParseSuffix>
OperandMatchResultTy tryParseSVEDataVector(OperandVector &Operands);
OperandMatchResultTy tryParseSVEPredicateVector(OperandVector &Operands);
template <RegKind VectorKind>
OperandMatchResultTy tryParseVectorList(OperandVector &Operands,
                                        bool ExpectMatch = false);
OperandMatchResultTy tryParseMatrixTileList(OperandVector &Operands);
OperandMatchResultTy tryParseSVEPattern(OperandVector &Operands);
OperandMatchResultTy tryParseGPR64x8(OperandVector &Operands);

272public:
enum AArch64MatchResultTy {
  Match_InvalidSuffix = FIRST_TARGET_MATCH_RESULT_TY,
275#define GET_OPERAND_DIAGNOSTIC_TYPES
276#include "AArch64GenAsmMatcher.inc"
};
bool IsILP32;

AArch64AsmParser(const MCSubtargetInfo &STI, MCAsmParser &Parser,
                 const MCInstrInfo &MII, const MCTargetOptions &Options)
  : MCTargetAsmParser(Options, STI, MII) {
  IsILP32 = STI.getTargetTriple().getEnvironment() == Triple::GNUILP32;
  MCAsmParserExtension::Initialize(Parser);
  MCStreamer &S = getParser().getStreamer();
  if (S.getTargetStreamer() == nullptr)
    new AArch64TargetStreamer(S);

  // Alias .hword/.word/.[dx]word to the target-independent
  // .2byte/.4byte/.8byte directives as they have the same form and
  // semantics:
  ///  ::= (.hword | .word | .dword | .xword ) [ expression (, expression)* ]
  Parser.addAliasForDirective(".hword", ".2byte");
  Parser.addAliasForDirective(".word", ".4byte");
  Parser.addAliasForDirective(".dword", ".8byte");
  Parser.addAliasForDirective(".xword", ".8byte");

  // Initialize the set of available features.
  setAvailableFeatures(ComputeAvailableFeatures(getSTI().getFeatureBits()));
}

bool regsEqual(const MCParsedAsmOperand &Op1,
               const MCParsedAsmOperand &Op2) const override;
bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
                      SMLoc NameLoc, OperandVector &Operands) override;
bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override;
OperandMatchResultTy tryParseRegister(unsigned &RegNo, SMLoc &StartLoc,
                                      SMLoc &EndLoc) override;
bool ParseDirective(AsmToken DirectiveID) override;
unsigned validateTargetOperandClass(MCParsedAsmOperand &Op,
                                    unsigned Kind) override;

static bool classifySymbolRef(const MCExpr *Expr,
                              AArch64MCExpr::VariantKind &ELFRefKind,
                              MCSymbolRefExpr::VariantKind &DarwinRefKind,
                              int64_t &Addend);
317};

319/// AArch64Operand - Instances of this class represent a parsed AArch64 machine
320/// instruction.
321class AArch64Operand : public MCParsedAsmOperand {
322private:
enum KindTy {
  k_Immediate,
  k_ShiftedImm,
  k_CondCode,
  k_Register,
  k_MatrixRegister,
  k_MatrixTileList,
  k_SVCR,
  k_VectorList,
  k_VectorIndex,
  k_Token,
  k_SysReg,
  k_SysCR,
  k_Prefetch,
  k_ShiftExtend,
  k_FPImm,
  k_Barrier,
  k_PSBHint,
  k_BTIHint,
} Kind;

SMLoc StartLoc, EndLoc;

struct TokOp {
  const char *Data;
  unsigned Length;
  bool IsSuffix; // Is the operand actually a suffix on the mnemonic.
};

// Separate shift/extend operand.
struct ShiftExtendOp {
  AArch64_AM::ShiftExtendType Type;
  unsigned Amount;
  bool HasExplicitAmount;
};

struct RegOp {
  unsigned RegNum;
  RegKind Kind;
  int ElementWidth;

  // The register may be allowed as a different register class,
  // e.g. for GPR64as32 or GPR32as64.
  RegConstraintEqualityTy EqualityTy;

  // In some cases the shift/extend needs to be explicitly parsed together
  // with the register, rather than as a separate operand. This is needed
  // for addressing modes where the instruction as a whole dictates the
  // scaling/extend, rather than specific bits in the instruction.
  // By parsing them as a single operand, we avoid the need to pass an
  // extra operand in all CodeGen patterns (because all operands need to
  // have an associated value), and we avoid the need to update TableGen to
  // accept operands that have no associated bits in the instruction.
  //
  // An added benefit of parsing them together is that the assembler
  // can give a sensible diagnostic if the scaling is not correct.
  //
  // The default is 'lsl #0' (HasExplicitAmount = false) if no
  // ShiftExtend is specified.
  ShiftExtendOp ShiftExtend;
};

struct MatrixRegOp {
  unsigned RegNum;
  unsigned ElementWidth;
  MatrixKind Kind;
};

struct MatrixTileListOp {
  unsigned RegMask = 0;
};

struct VectorListOp {
  unsigned RegNum;
  unsigned Count;
  unsigned NumElements;
  unsigned ElementWidth;
  RegKind  RegisterKind;
};

struct VectorIndexOp {
  int Val;
};

struct ImmOp {
  const MCExpr *Val;
};

struct ShiftedImmOp {
  const MCExpr *Val;
  unsigned ShiftAmount;
};

struct CondCodeOp {
  AArch64CC::CondCode Code;
};

struct FPImmOp {
  uint64_t Val; // APFloat value bitcasted to uint64_t.
  bool IsExact; // describes whether parsed value was exact.
};

struct BarrierOp {
  const char *Data;
  unsigned Length;
  unsigned Val; // Not the enum since not all values have names.
  bool HasnXSModifier;
};

struct SysRegOp {
  const char *Data;
  unsigned Length;
  uint32_t MRSReg;
  uint32_t MSRReg;
  uint32_t PStateField;
};

struct SysCRImmOp {
  unsigned Val;
};

struct PrefetchOp {
  const char *Data;
  unsigned Length;
  unsigned Val;
};

struct PSBHintOp {
  const char *Data;
  unsigned Length;
  unsigned Val;
};

struct BTIHintOp {
  const char *Data;
  unsigned Length;
  unsigned Val;
};

struct SVCROp {
  const char *Data;
  unsigned Length;
  unsigned PStateField;
};

union {
  struct TokOp Tok;
  struct RegOp Reg;
  struct MatrixRegOp MatrixReg;
  struct MatrixTileListOp MatrixTileList;
  struct VectorListOp VectorList;
  struct VectorIndexOp VectorIndex;
  struct ImmOp Imm;
  struct ShiftedImmOp ShiftedImm;
  struct CondCodeOp CondCode;
  struct FPImmOp FPImm;
  struct BarrierOp Barrier;
  struct SysRegOp SysReg;
  struct SysCRImmOp SysCRImm;
  struct PrefetchOp Prefetch;
  struct PSBHintOp PSBHint;
  struct BTIHintOp BTIHint;
  struct ShiftExtendOp ShiftExtend;
  struct SVCROp SVCR;
};

// Keep the MCContext around as the MCExprs may need manipulated during
// the add<>Operands() calls.
MCContext &Ctx;

493public:
AArch64Operand(KindTy K, MCContext &Ctx) : Kind(K), Ctx(Ctx) {}

AArch64Operand(const AArch64Operand &o) : MCParsedAsmOperand(), Ctx(o.Ctx) {
  Kind = o.Kind;
  StartLoc = o.StartLoc;
  EndLoc = o.EndLoc;
  switch (Kind) {
  case k_Token:
    Tok = o.Tok;
    break;
  case k_Immediate:
    Imm = o.Imm;
    break;
  case k_ShiftedImm:
    ShiftedImm = o.ShiftedImm;
    break;
  case k_CondCode:
    CondCode = o.CondCode;
    break;
  case k_FPImm:
    FPImm = o.FPImm;
    break;
  case k_Barrier:
    Barrier = o.Barrier;
    break;
  case k_Register:
    Reg = o.Reg;
    break;
  case k_MatrixRegister:
    MatrixReg = o.MatrixReg;
    break;
  case k_MatrixTileList:
    MatrixTileList = o.MatrixTileList;
    break;
  case k_VectorList:
    VectorList = o.VectorList;
    break;
  case k_VectorIndex:
    VectorIndex = o.VectorIndex;
    break;
  case k_SysReg:
    SysReg = o.SysReg;
    break;
  case k_SysCR:
    SysCRImm = o.SysCRImm;
    break;
  case k_Prefetch:
    Prefetch = o.Prefetch;
    break;
  case k_PSBHint:
    PSBHint = o.PSBHint;
    break;
  case k_BTIHint:
    BTIHint = o.BTIHint;
    break;
  case k_ShiftExtend:
    ShiftExtend = o.ShiftExtend;
    break;
  case k_SVCR:
    SVCR = o.SVCR;
    break;
  }
}

/// getStartLoc - Get the location of the first token of this operand.
SMLoc getStartLoc() const override { return StartLoc; }
/// getEndLoc - Get the location of the last token of this operand.
SMLoc getEndLoc() const override { return EndLoc; }

StringRef getToken() const {
  assert(Kind == k_Token && "Invalid access!")(static_cast <bool> (Kind == k_Token && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Token && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 564
, __extension__ __PRETTY_FUNCTION__));
  return StringRef(Tok.Data, Tok.Length);
}

bool isTokenSuffix() const {
  assert(Kind == k_Token && "Invalid access!")(static_cast <bool> (Kind == k_Token && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Token && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 569
, __extension__ __PRETTY_FUNCTION__));
  return Tok.IsSuffix;
}

const MCExpr *getImm() const {
  assert(Kind == k_Immediate && "Invalid access!")(static_cast <bool> (Kind == k_Immediate && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Immediate && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 574
, __extension__ __PRETTY_FUNCTION__));
  return Imm.Val;
}

const MCExpr *getShiftedImmVal() const {
  assert(Kind == k_ShiftedImm && "Invalid access!")(static_cast <bool> (Kind == k_ShiftedImm && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_ShiftedImm && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 579
, __extension__ __PRETTY_FUNCTION__));
  return ShiftedImm.Val;
}

unsigned getShiftedImmShift() const {
  assert(Kind == k_ShiftedImm && "Invalid access!")(static_cast <bool> (Kind == k_ShiftedImm && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_ShiftedImm && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 584
, __extension__ __PRETTY_FUNCTION__));
  return ShiftedImm.ShiftAmount;
}

AArch64CC::CondCode getCondCode() const {
  assert(Kind == k_CondCode && "Invalid access!")(static_cast <bool> (Kind == k_CondCode && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_CondCode && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 589
, __extension__ __PRETTY_FUNCTION__));
  return CondCode.Code;
}

APFloat getFPImm() const {
  assert (Kind == k_FPImm && "Invalid access!")(static_cast <bool> (Kind == k_FPImm && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_FPImm && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 594
, __extension__ __PRETTY_FUNCTION__));
  return APFloat(APFloat::IEEEdouble(), APInt(64, FPImm.Val, true));
}

bool getFPImmIsExact() const {
  assert (Kind == k_FPImm && "Invalid access!")(static_cast <bool> (Kind == k_FPImm && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_FPImm && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 599
, __extension__ __PRETTY_FUNCTION__));
  return FPImm.IsExact;
}

unsigned getBarrier() const {
  assert(Kind == k_Barrier && "Invalid access!")(static_cast <bool> (Kind == k_Barrier && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Barrier && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 604
, __extension__ __PRETTY_FUNCTION__));
  return Barrier.Val;
}

StringRef getBarrierName() const {
  assert(Kind == k_Barrier && "Invalid access!")(static_cast <bool> (Kind == k_Barrier && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Barrier && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 609
, __extension__ __PRETTY_FUNCTION__));
  return StringRef(Barrier.Data, Barrier.Length);
}

bool getBarriernXSModifier() const {
  assert(Kind == k_Barrier && "Invalid access!")(static_cast <bool> (Kind == k_Barrier && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Barrier && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 614
, __extension__ __PRETTY_FUNCTION__));
  return Barrier.HasnXSModifier;
}

unsigned getReg() const override {
  assert(Kind == k_Register && "Invalid access!")(static_cast <bool> (Kind == k_Register && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Register && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 619
, __extension__ __PRETTY_FUNCTION__));
  return Reg.RegNum;
}

unsigned getMatrixReg() const {
  assert(Kind == k_MatrixRegister && "Invalid access!")(static_cast <bool> (Kind == k_MatrixRegister &&
 "Invalid access!") ? void (0) : __assert_fail ("Kind == k_MatrixRegister && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 624
, __extension__ __PRETTY_FUNCTION__));
  return MatrixReg.RegNum;
}

unsigned getMatrixElementWidth() const {
  assert(Kind == k_MatrixRegister && "Invalid access!")(static_cast <bool> (Kind == k_MatrixRegister &&
 "Invalid access!") ? void (0) : __assert_fail ("Kind == k_MatrixRegister && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 629
, __extension__ __PRETTY_FUNCTION__));
  return MatrixReg.ElementWidth;
}

MatrixKind getMatrixKind() const {
  assert(Kind == k_MatrixRegister && "Invalid access!")(static_cast <bool> (Kind == k_MatrixRegister &&
 "Invalid access!") ? void (0) : __assert_fail ("Kind == k_MatrixRegister && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 634
, __extension__ __PRETTY_FUNCTION__));
  return MatrixReg.Kind;
}

unsigned getMatrixTileListRegMask() const {
  assert(isMatrixTileList() && "Invalid access!")(static_cast <bool> (isMatrixTileList() && "Invalid access!"
) ? void (0) : __assert_fail ("isMatrixTileList() && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 639
, __extension__ __PRETTY_FUNCTION__));
  return MatrixTileList.RegMask;
}

RegConstraintEqualityTy getRegEqualityTy() const {
  assert(Kind == k_Register && "Invalid access!")(static_cast <bool> (Kind == k_Register && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Register && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 644
, __extension__ __PRETTY_FUNCTION__));
  return Reg.EqualityTy;
}

unsigned getVectorListStart() const {
  assert(Kind == k_VectorList && "Invalid access!")(static_cast <bool> (Kind == k_VectorList && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_VectorList && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 649
, __extension__ __PRETTY_FUNCTION__));
  return VectorList.RegNum;
}

unsigned getVectorListCount() const {
  assert(Kind == k_VectorList && "Invalid access!")(static_cast <bool> (Kind == k_VectorList && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_VectorList && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 654
, __extension__ __PRETTY_FUNCTION__));
  return VectorList.Count;
}

int getVectorIndex() const {
  assert(Kind == k_VectorIndex && "Invalid access!")(static_cast <bool> (Kind == k_VectorIndex && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_VectorIndex && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 659
, __extension__ __PRETTY_FUNCTION__));
  return VectorIndex.Val;
}

StringRef getSysReg() const {
  assert(Kind == k_SysReg && "Invalid access!")(static_cast <bool> (Kind == k_SysReg && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_SysReg && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 664
, __extension__ __PRETTY_FUNCTION__));
  return StringRef(SysReg.Data, SysReg.Length);
}

unsigned getSysCR() const {
  assert(Kind == k_SysCR && "Invalid access!")(static_cast <bool> (Kind == k_SysCR && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_SysCR && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 669
, __extension__ __PRETTY_FUNCTION__));
  return SysCRImm.Val;
}

unsigned getPrefetch() const {
  assert(Kind == k_Prefetch && "Invalid access!")(static_cast <bool> (Kind == k_Prefetch && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Prefetch && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 674
, __extension__ __PRETTY_FUNCTION__));
  return Prefetch.Val;
}

unsigned getPSBHint() const {
  assert(Kind == k_PSBHint && "Invalid access!")(static_cast <bool> (Kind == k_PSBHint && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_PSBHint && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 679
, __extension__ __PRETTY_FUNCTION__));
  return PSBHint.Val;
}

StringRef getPSBHintName() const {
  assert(Kind == k_PSBHint && "Invalid access!")(static_cast <bool> (Kind == k_PSBHint && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_PSBHint && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 684
, __extension__ __PRETTY_FUNCTION__));
  return StringRef(PSBHint.Data, PSBHint.Length);
}

unsigned getBTIHint() const {
  assert(Kind == k_BTIHint && "Invalid access!")(static_cast <bool> (Kind == k_BTIHint && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_BTIHint && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 689
, __extension__ __PRETTY_FUNCTION__));
  return BTIHint.Val;
}

StringRef getBTIHintName() const {
  assert(Kind == k_BTIHint && "Invalid access!")(static_cast <bool> (Kind == k_BTIHint && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_BTIHint && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 694
, __extension__ __PRETTY_FUNCTION__));
  return StringRef(BTIHint.Data, BTIHint.Length);
}

StringRef getSVCR() const {
  assert(Kind == k_SVCR && "Invalid access!")(static_cast <bool> (Kind == k_SVCR && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_SVCR && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 699
, __extension__ __PRETTY_FUNCTION__));
  return StringRef(SVCR.Data, SVCR.Length);
}

StringRef getPrefetchName() const {
  assert(Kind == k_Prefetch && "Invalid access!")(static_cast <bool> (Kind == k_Prefetch && "Invalid access!"
) ? void (0) : __assert_fail ("Kind == k_Prefetch && \"Invalid access!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 704
, __extension__ __PRETTY_FUNCTION__));
  return StringRef(Prefetch.Data, Prefetch.Length);
}

AArch64_AM::ShiftExtendType getShiftExtendType() const {
  if (Kind == k_ShiftExtend)
    return ShiftExtend.Type;
  if (Kind == k_Register)
    return Reg.ShiftExtend.Type;
  llvm_unreachable("Invalid access!")::llvm::llvm_unreachable_internal("Invalid access!", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 713);
}

unsigned getShiftExtendAmount() const {
  if (Kind == k_ShiftExtend)
    return ShiftExtend.Amount;
  if (Kind == k_Register)
    return Reg.ShiftExtend.Amount;
  llvm_unreachable("Invalid access!")::llvm::llvm_unreachable_internal("Invalid access!", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 721);
}

bool hasShiftExtendAmount() const {
  if (Kind == k_ShiftExtend)
    return ShiftExtend.HasExplicitAmount;
  if (Kind == k_Register)
    return Reg.ShiftExtend.HasExplicitAmount;
  llvm_unreachable("Invalid access!")::llvm::llvm_unreachable_internal("Invalid access!", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 729);
}

bool isImm() const override { return Kind == k_Immediate; }
bool isMem() const override { return false; }

bool isUImm6() const {
  if (!isImm())
    return false;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return false;
  int64_t Val = MCE->getValue();
  return (Val >= 0 && Val < 64);
}

template <int Width> bool isSImm() const { return isSImmScaled<Width, 1>(); }

template <int Bits, int Scale> DiagnosticPredicate isSImmScaled() const {
  return isImmScaled<Bits, Scale>(true);
}

template <int Bits, int Scale> DiagnosticPredicate isUImmScaled() const {
  return isImmScaled<Bits, Scale>(false);
}

template <int Bits, int Scale>
DiagnosticPredicate isImmScaled(bool Signed) const {
  if (!isImm())
    return DiagnosticPredicateTy::NoMatch;

  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return DiagnosticPredicateTy::NoMatch;

  int64_t MinVal, MaxVal;
  if (Signed) {
    int64_t Shift = Bits - 1;
    MinVal = (int64_t(1) << Shift) * -Scale;
    MaxVal = ((int64_t(1) << Shift) - 1) * Scale;
  } else {
    MinVal = 0;
    MaxVal = ((int64_t(1) << Bits) - 1) * Scale;
  }

  int64_t Val = MCE->getValue();
  if (Val >= MinVal && Val <= MaxVal && (Val % Scale) == 0)
    return DiagnosticPredicateTy::Match;

  return DiagnosticPredicateTy::NearMatch;
}

DiagnosticPredicate isSVEPattern() const {
  if (!isImm())
    return DiagnosticPredicateTy::NoMatch;
  auto *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return DiagnosticPredicateTy::NoMatch;
  int64_t Val = MCE->getValue();
  if (Val >= 0 && Val < 32)
    return DiagnosticPredicateTy::Match;
  return DiagnosticPredicateTy::NearMatch;
}

bool isSymbolicUImm12Offset(const MCExpr *Expr) const {
  AArch64MCExpr::VariantKind ELFRefKind;
  MCSymbolRefExpr::VariantKind DarwinRefKind;
  int64_t Addend;
  if (!AArch64AsmParser::classifySymbolRef(Expr, ELFRefKind, DarwinRefKind,
                                         Addend)) {
    // If we don't understand the expression, assume the best and
    // let the fixup and relocation code deal with it.
    return true;
  }

  if (DarwinRefKind == MCSymbolRefExpr::VK_PAGEOFF ||
      ELFRefKind == AArch64MCExpr::VK_LO12 ||
      ELFRefKind == AArch64MCExpr::VK_GOT_LO12 ||
      ELFRefKind == AArch64MCExpr::VK_DTPREL_LO12 ||
      ELFRefKind == AArch64MCExpr::VK_DTPREL_LO12_NC ||
      ELFRefKind == AArch64MCExpr::VK_TPREL_LO12 ||
      ELFRefKind == AArch64MCExpr::VK_TPREL_LO12_NC ||
      ELFRefKind == AArch64MCExpr::VK_GOTTPREL_LO12_NC ||
      ELFRefKind == AArch64MCExpr::VK_TLSDESC_LO12 ||
      ELFRefKind == AArch64MCExpr::VK_SECREL_LO12 ||
      ELFRefKind == AArch64MCExpr::VK_SECREL_HI12 ||
      ELFRefKind == AArch64MCExpr::VK_GOT_PAGE_LO15) {
    // Note that we don't range-check the addend. It's adjusted modulo page
    // size when converted, so there is no "out of range" condition when using
    // @pageoff.
    return true;
  } else if (DarwinRefKind == MCSymbolRefExpr::VK_GOTPAGEOFF ||
             DarwinRefKind == MCSymbolRefExpr::VK_TLVPPAGEOFF) {
    // @gotpageoff/@tlvppageoff can only be used directly, not with an addend.
    return Addend == 0;
  }

  return false;
}

template <int Scale> bool isUImm12Offset() const {
  if (!isImm())
    return false;

  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return isSymbolicUImm12Offset(getImm());

  int64_t Val = MCE->getValue();
  return (Val % Scale) == 0 && Val >= 0 && (Val / Scale) < 0x1000;
}

template <int N, int M>
bool isImmInRange() const {
  if (!isImm())
    return false;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return false;
  int64_t Val = MCE->getValue();
  return (Val >= N && Val <= M);
}

// NOTE: Also used for isLogicalImmNot as anything that can be represented as
// a logical immediate can always be represented when inverted.
template <typename T>
bool isLogicalImm() const {
  if (!isImm())
    return false;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return false;

  int64_t Val = MCE->getValue();
  // Avoid left shift by 64 directly.
  uint64_t Upper = UINT64_C(-1)-1UL << (sizeof(T) * 4) << (sizeof(T) * 4);
  // Allow all-0 or all-1 in top bits to permit bitwise NOT.
  if ((Val & Upper) && (Val & Upper) != Upper)
    return false;

  return AArch64_AM::isLogicalImmediate(Val & ~Upper, sizeof(T) * 8);
}

bool isShiftedImm() const { return Kind == k_ShiftedImm; }

/// Returns the immediate value as a pair of (imm, shift) if the immediate is
/// a shifted immediate by value 'Shift' or '0', or if it is an unshifted
/// immediate that can be shifted by 'Shift'.
template <unsigned Width>
Optional<std::pair<int64_t, unsigned> > getShiftedVal() const {
  if (isShiftedImm() && Width == getShiftedImmShift())
    if (auto *CE = dyn_cast<MCConstantExpr>(getShiftedImmVal()))
      return std::make_pair(CE->getValue(), Width);

  if (isImm())
    if (auto *CE = dyn_cast<MCConstantExpr>(getImm())) {
      int64_t Val = CE->getValue();
      if ((Val != 0) && (uint64_t(Val >> Width) << Width) == uint64_t(Val))
        return std::make_pair(Val >> Width, Width);
      else
        return std::make_pair(Val, 0u);
    }

  return {};
}

bool isAddSubImm() const {
  if (!isShiftedImm() && !isImm())
    return false;

  const MCExpr *Expr;

  // An ADD/SUB shifter is either 'lsl #0' or 'lsl #12'.
  if (isShiftedImm()) {
    unsigned Shift = ShiftedImm.ShiftAmount;
    Expr = ShiftedImm.Val;
    if (Shift != 0 && Shift != 12)
      return false;
  } else {
    Expr = getImm();
  }

  AArch64MCExpr::VariantKind ELFRefKind;
  MCSymbolRefExpr::VariantKind DarwinRefKind;
  int64_t Addend;
  if (AArch64AsmParser::classifySymbolRef(Expr, ELFRefKind,
                                        DarwinRefKind, Addend)) {
    return DarwinRefKind == MCSymbolRefExpr::VK_PAGEOFF
        || DarwinRefKind == MCSymbolRefExpr::VK_TLVPPAGEOFF
        || (DarwinRefKind == MCSymbolRefExpr::VK_GOTPAGEOFF && Addend == 0)
        || ELFRefKind == AArch64MCExpr::VK_LO12
        || ELFRefKind == AArch64MCExpr::VK_DTPREL_HI12
        || ELFRefKind == AArch64MCExpr::VK_DTPREL_LO12
        || ELFRefKind == AArch64MCExpr::VK_DTPREL_LO12_NC
        || ELFRefKind == AArch64MCExpr::VK_TPREL_HI12
        || ELFRefKind == AArch64MCExpr::VK_TPREL_LO12
        || ELFRefKind == AArch64MCExpr::VK_TPREL_LO12_NC
        || ELFRefKind == AArch64MCExpr::VK_TLSDESC_LO12
        || ELFRefKind == AArch64MCExpr::VK_SECREL_HI12
        || ELFRefKind == AArch64MCExpr::VK_SECREL_LO12;
  }

  // If it's a constant, it should be a real immediate in range.
  if (auto ShiftedVal = getShiftedVal<12>())
    return ShiftedVal->first >= 0 && ShiftedVal->first <= 0xfff;

  // If it's an expression, we hope for the best and let the fixup/relocation
  // code deal with it.
  return true;
}

bool isAddSubImmNeg() const {
  if (!isShiftedImm() && !isImm())
    return false;

  // Otherwise it should be a real negative immediate in range.
  if (auto ShiftedVal = getShiftedVal<12>())
    return ShiftedVal->first < 0 && -ShiftedVal->first <= 0xfff;

  return false;
}

// Signed value in the range -128 to +127. For element widths of
// 16 bits or higher it may also be a signed multiple of 256 in the
// range -32768 to +32512.
// For element-width of 8 bits a range of -128 to 255 is accepted,
// since a copy of a byte can be either signed/unsigned.
template <typename T>
DiagnosticPredicate isSVECpyImm() const {
  if (!isShiftedImm() && (!isImm() || !isa<MCConstantExpr>(getImm())))
    return DiagnosticPredicateTy::NoMatch;

  bool IsByte = std::is_same<int8_t, std::make_signed_t<T>>::value ||
                std::is_same<int8_t, T>::value;
  if (auto ShiftedImm = getShiftedVal<8>())
    if (!(IsByte && ShiftedImm->second) &&
        AArch64_AM::isSVECpyImm<T>(uint64_t(ShiftedImm->first)
                                   << ShiftedImm->second))
      return DiagnosticPredicateTy::Match;

  return DiagnosticPredicateTy::NearMatch;
}

// Unsigned value in the range 0 to 255. For element widths of
// 16 bits or higher it may also be a signed multiple of 256 in the
// range 0 to 65280.
template <typename T> DiagnosticPredicate isSVEAddSubImm() const {
  if (!isShiftedImm() && (!isImm() || !isa<MCConstantExpr>(getImm())))
    return DiagnosticPredicateTy::NoMatch;

  bool IsByte = std::is_same<int8_t, std::make_signed_t<T>>::value ||
                std::is_same<int8_t, T>::value;
  if (auto ShiftedImm = getShiftedVal<8>())
    if (!(IsByte && ShiftedImm->second) &&
        AArch64_AM::isSVEAddSubImm<T>(ShiftedImm->first
                                      << ShiftedImm->second))
      return DiagnosticPredicateTy::Match;

  return DiagnosticPredicateTy::NearMatch;
}

template <typename T> DiagnosticPredicate isSVEPreferredLogicalImm() const {
  if (isLogicalImm<T>() && !isSVECpyImm<T>())
    return DiagnosticPredicateTy::Match;
  return DiagnosticPredicateTy::NoMatch;
}

bool isCondCode() const { return Kind == k_CondCode; }

bool isSIMDImmType10() const {
  if (!isImm())
    return false;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return false;
  return AArch64_AM::isAdvSIMDModImmType10(MCE->getValue());
}

template<int N>
bool isBranchTarget() const {
  if (!isImm())
    return false;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    return true;
  int64_t Val = MCE->getValue();
  if (Val & 0x3)
    return false;
  assert(N > 0 && "Branch target immediate cannot be 0 bits!")(static_cast <bool> (N > 0 && "Branch target immediate cannot be 0 bits!"
) ? void (0) : __assert_fail ("N > 0 && \"Branch target immediate cannot be 0 bits!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1017
, __extension__ __PRETTY_FUNCTION__));
  return (Val >= -((1<<(N-1)) << 2) && Val <= (((1<<(N-1))-1) << 2));
}

bool
isMovWSymbol(ArrayRef<AArch64MCExpr::VariantKind> AllowedModifiers) const {
  if (!isImm())
    return false;

  AArch64MCExpr::VariantKind ELFRefKind;
  MCSymbolRefExpr::VariantKind DarwinRefKind;
  int64_t Addend;
  if (!AArch64AsmParser::classifySymbolRef(getImm(), ELFRefKind,
                                           DarwinRefKind, Addend)) {
    return false;
  }
  if (DarwinRefKind != MCSymbolRefExpr::VK_None)
    return false;

  return llvm::is_contained(AllowedModifiers, ELFRefKind);
}

bool isMovWSymbolG3() const {
  return isMovWSymbol({AArch64MCExpr::VK_ABS_G3, AArch64MCExpr::VK_PREL_G3});
}

bool isMovWSymbolG2() const {
  return isMovWSymbol(
      {AArch64MCExpr::VK_ABS_G2, AArch64MCExpr::VK_ABS_G2_S,
       AArch64MCExpr::VK_ABS_G2_NC, AArch64MCExpr::VK_PREL_G2,
       AArch64MCExpr::VK_PREL_G2_NC, AArch64MCExpr::VK_TPREL_G2,
       AArch64MCExpr::VK_DTPREL_G2});
}

bool isMovWSymbolG1() const {
  return isMovWSymbol(
      {AArch64MCExpr::VK_ABS_G1, AArch64MCExpr::VK_ABS_G1_S,
       AArch64MCExpr::VK_ABS_G1_NC, AArch64MCExpr::VK_PREL_G1,
       AArch64MCExpr::VK_PREL_G1_NC, AArch64MCExpr::VK_GOTTPREL_G1,
       AArch64MCExpr::VK_TPREL_G1, AArch64MCExpr::VK_TPREL_G1_NC,
       AArch64MCExpr::VK_DTPREL_G1, AArch64MCExpr::VK_DTPREL_G1_NC});
}

bool isMovWSymbolG0() const {
  return isMovWSymbol(
      {AArch64MCExpr::VK_ABS_G0, AArch64MCExpr::VK_ABS_G0_S,
       AArch64MCExpr::VK_ABS_G0_NC, AArch64MCExpr::VK_PREL_G0,
       AArch64MCExpr::VK_PREL_G0_NC, AArch64MCExpr::VK_GOTTPREL_G0_NC,
       AArch64MCExpr::VK_TPREL_G0, AArch64MCExpr::VK_TPREL_G0_NC,
       AArch64MCExpr::VK_DTPREL_G0, AArch64MCExpr::VK_DTPREL_G0_NC});
}

template<int RegWidth, int Shift>
bool isMOVZMovAlias() const {
  if (!isImm()) return false;

  const MCExpr *E = getImm();
  if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(E)) {
    uint64_t Value = CE->getValue();

    return AArch64_AM::isMOVZMovAlias(Value, Shift, RegWidth);
  }
  // Only supports the case of Shift being 0 if an expression is used as an
  // operand
  return !Shift && E;
}

template<int RegWidth, int Shift>
bool isMOVNMovAlias() const {
  if (!isImm()) return false;

  const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
  if (!CE) return false;
  uint64_t Value = CE->getValue();

  return AArch64_AM::isMOVNMovAlias(Value, Shift, RegWidth);
}

bool isFPImm() const {
  return Kind == k_FPImm &&
         AArch64_AM::getFP64Imm(getFPImm().bitcastToAPInt()) != -1;
}

bool isBarrier() const {
  return Kind == k_Barrier && !getBarriernXSModifier();
}
bool isBarriernXS() const {
  return Kind == k_Barrier && getBarriernXSModifier();
}
bool isSysReg() const { return Kind == k_SysReg; }

bool isMRSSystemRegister() const {
  if (!isSysReg()) return false;

  return SysReg.MRSReg != -1U;
}

bool isMSRSystemRegister() const {
  if (!isSysReg()) return false;
  return SysReg.MSRReg != -1U;
}

bool isSystemPStateFieldWithImm0_1() const {
  if (!isSysReg()) return false;
  return (SysReg.PStateField == AArch64PState::PAN ||
          SysReg.PStateField == AArch64PState::DIT ||
          SysReg.PStateField == AArch64PState::UAO ||
          SysReg.PStateField == AArch64PState::SSBS);
}

bool isSystemPStateFieldWithImm0_15() const {
  if (!isSysReg() || isSystemPStateFieldWithImm0_1()) return false;
  return SysReg.PStateField != -1U;
}

bool isSVCR() const {
  if (Kind != k_SVCR)
    return false;
  return SVCR.PStateField != -1U;
}

bool isReg() const override {
  return Kind == k_Register;
}

bool isScalarReg() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar;
}

bool isNeonVectorReg() const {
  return Kind == k_Register && Reg.Kind == RegKind::NeonVector;
}

bool isNeonVectorRegLo() const {
  return Kind == k_Register && Reg.Kind == RegKind::NeonVector &&
         (AArch64MCRegisterClasses[AArch64::FPR128_loRegClassID].contains(
              Reg.RegNum) ||
          AArch64MCRegisterClasses[AArch64::FPR64_loRegClassID].contains(
              Reg.RegNum));
}

bool isMatrix() const { return Kind == k_MatrixRegister; }
bool isMatrixTileList() const { return Kind == k_MatrixTileList; }

template <unsigned Class> bool isSVEVectorReg() const {
  RegKind RK;
  switch (Class) {
  case AArch64::ZPRRegClassID:
  case AArch64::ZPR_3bRegClassID:
  case AArch64::ZPR_4bRegClassID:
    RK = RegKind::SVEDataVector;
    break;
  case AArch64::PPRRegClassID:
  case AArch64::PPR_3bRegClassID:
    RK = RegKind::SVEPredicateVector;
    break;
  default:
    llvm_unreachable("Unsupport register class")::llvm::llvm_unreachable_internal("Unsupport register class",
 "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1174
);
  }

  return (Kind == k_Register && Reg.Kind == RK) &&
         AArch64MCRegisterClasses[Class].contains(getReg());
}

template <unsigned Class> bool isFPRasZPR() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar &&
         AArch64MCRegisterClasses[Class].contains(getReg());
}

template <int ElementWidth, unsigned Class>
DiagnosticPredicate isSVEPredicateVectorRegOfWidth() const {
  if (Kind != k_Register || Reg.Kind != RegKind::SVEPredicateVector)
    return DiagnosticPredicateTy::NoMatch;

  if (isSVEVectorReg<Class>() && (Reg.ElementWidth == ElementWidth))
    return DiagnosticPredicateTy::Match;

  return DiagnosticPredicateTy::NearMatch;
}

template <int ElementWidth, unsigned Class>
DiagnosticPredicate isSVEDataVectorRegOfWidth() const {
  if (Kind != k_Register || Reg.Kind != RegKind::SVEDataVector)
    return DiagnosticPredicateTy::NoMatch;

  if (isSVEVectorReg<Class>() && Reg.ElementWidth == ElementWidth)
    return DiagnosticPredicateTy::Match;

  return DiagnosticPredicateTy::NearMatch;
}

template <int ElementWidth, unsigned Class,
          AArch64_AM::ShiftExtendType ShiftExtendTy, int ShiftWidth,
          bool ShiftWidthAlwaysSame>
DiagnosticPredicate isSVEDataVectorRegWithShiftExtend() const {
  auto VectorMatch = isSVEDataVectorRegOfWidth<ElementWidth, Class>();
  if (!VectorMatch.isMatch())
    return DiagnosticPredicateTy::NoMatch;

  // Give a more specific diagnostic when the user has explicitly typed in
  // a shift-amount that does not match what is expected, but for which
  // there is also an unscaled addressing mode (e.g. sxtw/uxtw).
  bool MatchShift = getShiftExtendAmount() == Log2_32(ShiftWidth / 8);
  if (!MatchShift && (ShiftExtendTy == AArch64_AM::UXTW ||
                      ShiftExtendTy == AArch64_AM::SXTW) &&
      !ShiftWidthAlwaysSame && hasShiftExtendAmount() && ShiftWidth == 8)
    return DiagnosticPredicateTy::NoMatch;

  if (MatchShift && ShiftExtendTy == getShiftExtendType())
    return DiagnosticPredicateTy::Match;

  return DiagnosticPredicateTy::NearMatch;
}

bool isGPR32as64() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar &&
    AArch64MCRegisterClasses[AArch64::GPR64RegClassID].contains(Reg.RegNum);
}

bool isGPR64as32() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar &&
    AArch64MCRegisterClasses[AArch64::GPR32RegClassID].contains(Reg.RegNum);
}

bool isGPR64x8() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar &&
         AArch64MCRegisterClasses[AArch64::GPR64x8ClassRegClassID].contains(
             Reg.RegNum);
}

bool isWSeqPair() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar &&
         AArch64MCRegisterClasses[AArch64::WSeqPairsClassRegClassID].contains(
             Reg.RegNum);
}

bool isXSeqPair() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar &&
         AArch64MCRegisterClasses[AArch64::XSeqPairsClassRegClassID].contains(
             Reg.RegNum);
}

template<int64_t Angle, int64_t Remainder>
DiagnosticPredicate isComplexRotation() const {
  if (!isImm()) return DiagnosticPredicateTy::NoMatch;

  const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
  if (!CE) return DiagnosticPredicateTy::NoMatch;
  uint64_t Value = CE->getValue();

  if (Value % Angle == Remainder && Value <= 270)
    return DiagnosticPredicateTy::Match;
  return DiagnosticPredicateTy::NearMatch;
}

template <unsigned RegClassID> bool isGPR64() const {
  return Kind == k_Register && Reg.Kind == RegKind::Scalar &&
         AArch64MCRegisterClasses[RegClassID].contains(getReg());
}

template <unsigned RegClassID, int ExtWidth>
DiagnosticPredicate isGPR64WithShiftExtend() const {
  if (Kind != k_Register || Reg.Kind != RegKind::Scalar)
    return DiagnosticPredicateTy::NoMatch;

  if (isGPR64<RegClassID>() && getShiftExtendType() == AArch64_AM::LSL &&
      getShiftExtendAmount() == Log2_32(ExtWidth / 8))
    return DiagnosticPredicateTy::Match;
  return DiagnosticPredicateTy::NearMatch;
}

/// Is this a vector list with the type implicit (presumably attached to the
/// instruction itself)?
template <RegKind VectorKind, unsigned NumRegs>
bool isImplicitlyTypedVectorList() const {
  return Kind == k_VectorList && VectorList.Count == NumRegs &&
         VectorList.NumElements == 0 &&
         VectorList.RegisterKind == VectorKind;
}

template <RegKind VectorKind, unsigned NumRegs, unsigned NumElements,
          unsigned ElementWidth>
bool isTypedVectorList() const {
  if (Kind != k_VectorList)
    return false;
  if (VectorList.Count != NumRegs)
    return false;
  if (VectorList.RegisterKind != VectorKind)
    return false;
  if (VectorList.ElementWidth != ElementWidth)
    return false;
  return VectorList.NumElements == NumElements;
}

template <int Min, int Max>
DiagnosticPredicate isVectorIndex() const {
  if (Kind != k_VectorIndex)
    return DiagnosticPredicateTy::NoMatch;
  if (VectorIndex.Val >= Min && VectorIndex.Val <= Max)
    return DiagnosticPredicateTy::Match;
  return DiagnosticPredicateTy::NearMatch;
}

bool isToken() const override { return Kind == k_Token; }

bool isTokenEqual(StringRef Str) const {
  return Kind == k_Token && getToken() == Str;
}
bool isSysCR() const { return Kind == k_SysCR; }
bool isPrefetch() const { return Kind == k_Prefetch; }
bool isPSBHint() const { return Kind == k_PSBHint; }
bool isBTIHint() const { return Kind == k_BTIHint; }
bool isShiftExtend() const { return Kind == k_ShiftExtend; }
bool isShifter() const {
  if (!isShiftExtend())
    return false;

  AArch64_AM::ShiftExtendType ST = getShiftExtendType();
  return (ST == AArch64_AM::LSL || ST == AArch64_AM::LSR ||
          ST == AArch64_AM::ASR || ST == AArch64_AM::ROR ||
          ST == AArch64_AM::MSL);
}

template <unsigned ImmEnum> DiagnosticPredicate isExactFPImm() const {
  if (Kind != k_FPImm)
    return DiagnosticPredicateTy::NoMatch;

  if (getFPImmIsExact()) {
    // Lookup the immediate from table of supported immediates.
    auto *Desc = AArch64ExactFPImm::lookupExactFPImmByEnum(ImmEnum);
    assert(Desc && "Unknown enum value")(static_cast <bool> (Desc && "Unknown enum value"
) ? void (0) : __assert_fail ("Desc && \"Unknown enum value\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1347
, __extension__ __PRETTY_FUNCTION__));

    // Calculate its FP value.
    APFloat RealVal(APFloat::IEEEdouble());
    auto StatusOrErr =
        RealVal.convertFromString(Desc->Repr, APFloat::rmTowardZero);
    if (errorToBool(StatusOrErr.takeError()) || *StatusOrErr != APFloat::opOK)
      llvm_unreachable("FP immediate is not exact")::llvm::llvm_unreachable_internal("FP immediate is not exact"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1354
);

    if (getFPImm().bitwiseIsEqual(RealVal))
      return DiagnosticPredicateTy::Match;
  }

  return DiagnosticPredicateTy::NearMatch;
}

template <unsigned ImmA, unsigned ImmB>
DiagnosticPredicate isExactFPImm() const {
  DiagnosticPredicate Res = DiagnosticPredicateTy::NoMatch;
  if ((Res = isExactFPImm<ImmA>()))
    return DiagnosticPredicateTy::Match;
  if ((Res = isExactFPImm<ImmB>()))
    return DiagnosticPredicateTy::Match;
  return Res;
}

bool isExtend() const {
  if (!isShiftExtend())
    return false;

  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  return (ET == AArch64_AM::UXTB || ET == AArch64_AM::SXTB ||
          ET == AArch64_AM::UXTH || ET == AArch64_AM::SXTH ||
          ET == AArch64_AM::UXTW || ET == AArch64_AM::SXTW ||
          ET == AArch64_AM::UXTX || ET == AArch64_AM::SXTX ||
          ET == AArch64_AM::LSL) &&
         getShiftExtendAmount() <= 4;
}

bool isExtend64() const {
  if (!isExtend())
    return false;
  // Make sure the extend expects a 32-bit source register.
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  return ET == AArch64_AM::UXTB || ET == AArch64_AM::SXTB ||
         ET == AArch64_AM::UXTH || ET == AArch64_AM::SXTH ||
         ET == AArch64_AM::UXTW || ET == AArch64_AM::SXTW;
}

bool isExtendLSL64() const {
  if (!isExtend())
    return false;
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  return (ET == AArch64_AM::UXTX || ET == AArch64_AM::SXTX ||
          ET == AArch64_AM::LSL) &&
         getShiftExtendAmount() <= 4;
}

template<int Width> bool isMemXExtend() const {
  if (!isExtend())
    return false;
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  return (ET == AArch64_AM::LSL || ET == AArch64_AM::SXTX) &&
         (getShiftExtendAmount() == Log2_32(Width / 8) ||
          getShiftExtendAmount() == 0);
}

template<int Width> bool isMemWExtend() const {
  if (!isExtend())
    return false;
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  return (ET == AArch64_AM::UXTW || ET == AArch64_AM::SXTW) &&
         (getShiftExtendAmount() == Log2_32(Width / 8) ||
          getShiftExtendAmount() == 0);
}

template <unsigned width>
bool isArithmeticShifter() const {
  if (!isShifter())
    return false;

  // An arithmetic shifter is LSL, LSR, or ASR.
  AArch64_AM::ShiftExtendType ST = getShiftExtendType();
  return (ST == AArch64_AM::LSL || ST == AArch64_AM::LSR ||
          ST == AArch64_AM::ASR) && getShiftExtendAmount() < width;
}

template <unsigned width>
bool isLogicalShifter() const {
  if (!isShifter())
    return false;

  // A logical shifter is LSL, LSR, ASR or ROR.
  AArch64_AM::ShiftExtendType ST = getShiftExtendType();
  return (ST == AArch64_AM::LSL || ST == AArch64_AM::LSR ||
          ST == AArch64_AM::ASR || ST == AArch64_AM::ROR) &&
         getShiftExtendAmount() < width;
}

bool isMovImm32Shifter() const {
  if (!isShifter())
    return false;

  // A MOVi shifter is LSL of 0, 16, 32, or 48.
  AArch64_AM::ShiftExtendType ST = getShiftExtendType();
  if (ST != AArch64_AM::LSL)
    return false;
  uint64_t Val = getShiftExtendAmount();
  return (Val == 0 || Val == 16);
}

bool isMovImm64Shifter() const {
  if (!isShifter())
    return false;

  // A MOVi shifter is LSL of 0 or 16.
  AArch64_AM::ShiftExtendType ST = getShiftExtendType();
  if (ST != AArch64_AM::LSL)
    return false;
  uint64_t Val = getShiftExtendAmount();
  return (Val == 0 || Val == 16 || Val == 32 || Val == 48);
}

bool isLogicalVecShifter() const {
  if (!isShifter())
    return false;

  // A logical vector shifter is a left shift by 0, 8, 16, or 24.
  unsigned Shift = getShiftExtendAmount();
  return getShiftExtendType() == AArch64_AM::LSL &&
         (Shift == 0 || Shift == 8 || Shift == 16 || Shift == 24);
}

bool isLogicalVecHalfWordShifter() const {
  if (!isLogicalVecShifter())
    return false;

  // A logical vector shifter is a left shift by 0 or 8.
  unsigned Shift = getShiftExtendAmount();
  return getShiftExtendType() == AArch64_AM::LSL &&
         (Shift == 0 || Shift == 8);
}

bool isMoveVecShifter() const {
  if (!isShiftExtend())
    return false;

  // A logical vector shifter is a left shift by 8 or 16.
  unsigned Shift = getShiftExtendAmount();
  return getShiftExtendType() == AArch64_AM::MSL &&
         (Shift == 8 || Shift == 16);
}

// Fallback unscaled operands are for aliases of LDR/STR that fall back
// to LDUR/STUR when the offset is not legal for the former but is for
// the latter. As such, in addition to checking for being a legal unscaled
// address, also check that it is not a legal scaled address. This avoids
// ambiguity in the matcher.
template<int Width>
bool isSImm9OffsetFB() const {
  return isSImm<9>() && !isUImm12Offset<Width / 8>();
}

bool isAdrpLabel() const {
  // Validation was handled during parsing, so we just verify that
  // something didn't go haywire.
  if (!isImm())
      return false;

  if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Imm.Val)) {
    int64_t Val = CE->getValue();
    int64_t Min = - (4096 * (1LL << (21 - 1)));
    int64_t Max = 4096 * ((1LL << (21 - 1)) - 1);
    return (Val % 4096) == 0 && Val >= Min && Val <= Max;
  }

  return true;
}

bool isAdrLabel() const {
  // Validation was handled during parsing, so we just verify that
  // something didn't go haywire.
  if (!isImm())
      return false;

  if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Imm.Val)) {
    int64_t Val = CE->getValue();
    int64_t Min = - (1LL << (21 - 1));
    int64_t Max = ((1LL << (21 - 1)) - 1);
    return Val >= Min && Val <= Max;
  }

  return true;
}

template <MatrixKind Kind, unsigned EltSize, unsigned RegClass>
DiagnosticPredicate isMatrixRegOperand() const {
  if (!isMatrix())
    return DiagnosticPredicateTy::NoMatch;
  if (getMatrixKind() != Kind ||
      !AArch64MCRegisterClasses[RegClass].contains(getMatrixReg()) ||
      EltSize != getMatrixElementWidth())
    return DiagnosticPredicateTy::NearMatch;
  return DiagnosticPredicateTy::Match;
}

void addExpr(MCInst &Inst, const MCExpr *Expr) const {
  // Add as immediates when possible.  Null MCExpr = 0.
  if (!Expr)
    Inst.addOperand(MCOperand::createImm(0));
  else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
    Inst.addOperand(MCOperand::createImm(CE->getValue()));
  else
    Inst.addOperand(MCOperand::createExpr(Expr));
}

void addRegOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1564
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createReg(getReg()));
}

void addMatrixOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1569
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createReg(getMatrixReg()));
}

void addGPR32as64Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1574
, __extension__ __PRETTY_FUNCTION__));
  assert((static_cast <bool> (AArch64MCRegisterClasses[AArch64::
GPR64RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::GPR64RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1576
, __extension__ __PRETTY_FUNCTION__))
      AArch64MCRegisterClasses[AArch64::GPR64RegClassID].contains(getReg()))(static_cast <bool> (AArch64MCRegisterClasses[AArch64::
GPR64RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::GPR64RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1576
, __extension__ __PRETTY_FUNCTION__));

  const MCRegisterInfo *RI = Ctx.getRegisterInfo();
  uint32_t Reg = RI->getRegClass(AArch64::GPR32RegClassID).getRegister(
      RI->getEncodingValue(getReg()));

  Inst.addOperand(MCOperand::createReg(Reg));
}

void addGPR64as32Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1586
, __extension__ __PRETTY_FUNCTION__));
  assert((static_cast <bool> (AArch64MCRegisterClasses[AArch64::
GPR32RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::GPR32RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1588
, __extension__ __PRETTY_FUNCTION__))
      AArch64MCRegisterClasses[AArch64::GPR32RegClassID].contains(getReg()))(static_cast <bool> (AArch64MCRegisterClasses[AArch64::
GPR32RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::GPR32RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1588
, __extension__ __PRETTY_FUNCTION__));

  const MCRegisterInfo *RI = Ctx.getRegisterInfo();
  uint32_t Reg = RI->getRegClass(AArch64::GPR64RegClassID).getRegister(
      RI->getEncodingValue(getReg()));

  Inst.addOperand(MCOperand::createReg(Reg));
}

template <int Width>
void addFPRasZPRRegOperands(MCInst &Inst, unsigned N) const {
  unsigned Base;
  switch (Width) {
  case 8:   Base = AArch64::B0; break;
  case 16:  Base = AArch64::H0; break;
  case 32:  Base = AArch64::S0; break;
  case 64:  Base = AArch64::D0; break;
  case 128: Base = AArch64::Q0; break;
  default:
    llvm_unreachable("Unsupported width")::llvm::llvm_unreachable_internal("Unsupported width", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 1607);
  }
  Inst.addOperand(MCOperand::createReg(AArch64::Z0 + getReg() - Base));
}

void addVectorReg64Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1613
, __extension__ __PRETTY_FUNCTION__));
  assert((static_cast <bool> (AArch64MCRegisterClasses[AArch64::
FPR128RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1615
, __extension__ __PRETTY_FUNCTION__))
      AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg()))(static_cast <bool> (AArch64MCRegisterClasses[AArch64::
FPR128RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1615
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createReg(AArch64::D0 + getReg() - AArch64::Q0));
}

void addVectorReg128Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1620
, __extension__ __PRETTY_FUNCTION__));
  assert((static_cast <bool> (AArch64MCRegisterClasses[AArch64::
FPR128RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1622
, __extension__ __PRETTY_FUNCTION__))
      AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg()))(static_cast <bool> (AArch64MCRegisterClasses[AArch64::
FPR128RegClassID].contains(getReg())) ? void (0) : __assert_fail
 ("AArch64MCRegisterClasses[AArch64::FPR128RegClassID].contains(getReg())"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1622
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createReg(getReg()));
}

void addVectorRegLoOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1627
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createReg(getReg()));
}

enum VecListIndexType {
  VecListIdx_DReg = 0,
  VecListIdx_QReg = 1,
  VecListIdx_ZReg = 2,
};

template <VecListIndexType RegTy, unsigned NumRegs>
void addVectorListOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1639
, __extension__ __PRETTY_FUNCTION__));
  static const unsigned FirstRegs[][5] = {
    /* DReg */ { AArch64::Q0,
                 AArch64::D0,       AArch64::D0_D1,
                 AArch64::D0_D1_D2, AArch64::D0_D1_D2_D3 },
    /* QReg */ { AArch64::Q0,
                 AArch64::Q0,       AArch64::Q0_Q1,
                 AArch64::Q0_Q1_Q2, AArch64::Q0_Q1_Q2_Q3 },
    /* ZReg */ { AArch64::Z0,
                 AArch64::Z0,       AArch64::Z0_Z1,
                 AArch64::Z0_Z1_Z2, AArch64::Z0_Z1_Z2_Z3 }
  };

  assert((RegTy != VecListIdx_ZReg || NumRegs <= 4) &&(static_cast <bool> ((RegTy != VecListIdx_ZReg || NumRegs
 <= 4) && " NumRegs must be <= 4 for ZRegs") ? void
 (0) : __assert_fail ("(RegTy != VecListIdx_ZReg || NumRegs <= 4) && \" NumRegs must be <= 4 for ZRegs\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1653
, __extension__ __PRETTY_FUNCTION__))
         " NumRegs must be <= 4 for ZRegs")(static_cast <bool> ((RegTy != VecListIdx_ZReg || NumRegs
 <= 4) && " NumRegs must be <= 4 for ZRegs") ? void
 (0) : __assert_fail ("(RegTy != VecListIdx_ZReg || NumRegs <= 4) && \" NumRegs must be <= 4 for ZRegs\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1653
, __extension__ __PRETTY_FUNCTION__));

  unsigned FirstReg = FirstRegs[(unsigned)RegTy][NumRegs];
  Inst.addOperand(MCOperand::createReg(FirstReg + getVectorListStart() -
                                       FirstRegs[(unsigned)RegTy][0]));
}

void addMatrixTileListOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1661
, __extension__ __PRETTY_FUNCTION__));
  unsigned RegMask = getMatrixTileListRegMask();
  assert(RegMask <= 0xFF && "Invalid mask!")(static_cast <bool> (RegMask <= 0xFF && "Invalid mask!"
) ? void (0) : __assert_fail ("RegMask <= 0xFF && \"Invalid mask!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1663
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(RegMask));
}

void addVectorIndexOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1668
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getVectorIndex()));
}

template <unsigned ImmIs0, unsigned ImmIs1>
void addExactFPImmOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1674
, __extension__ __PRETTY_FUNCTION__));
  assert(bool(isExactFPImm<ImmIs0, ImmIs1>()) && "Invalid operand")(static_cast <bool> (bool(isExactFPImm<ImmIs0, ImmIs1
>()) && "Invalid operand") ? void (0) : __assert_fail
 ("bool(isExactFPImm<ImmIs0, ImmIs1>()) && \"Invalid operand\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1675
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(bool(isExactFPImm<ImmIs1>())));
}

void addImmOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1680
, __extension__ __PRETTY_FUNCTION__));
  // If this is a pageoff symrefexpr with an addend, adjust the addend
  // to be only the page-offset portion. Otherwise, just add the expr
  // as-is.
  addExpr(Inst, getImm());
}

template <int Shift>
void addImmWithOptionalShiftOperands(MCInst &Inst, unsigned N) const {
  assert(N == 2 && "Invalid number of operands!")(static_cast <bool> (N == 2 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 2 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1689
, __extension__ __PRETTY_FUNCTION__));
  if (auto ShiftedVal = getShiftedVal<Shift>()) {
    Inst.addOperand(MCOperand::createImm(ShiftedVal->first));
    Inst.addOperand(MCOperand::createImm(ShiftedVal->second));
  } else if (isShiftedImm()) {
    addExpr(Inst, getShiftedImmVal());
    Inst.addOperand(MCOperand::createImm(getShiftedImmShift()));
  } else {
    addExpr(Inst, getImm());
    Inst.addOperand(MCOperand::createImm(0));
  }
}

template <int Shift>
void addImmNegWithOptionalShiftOperands(MCInst &Inst, unsigned N) const {
  assert(N == 2 && "Invalid number of operands!")(static_cast <bool> (N == 2 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 2 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1704
, __extension__ __PRETTY_FUNCTION__));
  if (auto ShiftedVal = getShiftedVal<Shift>()) {
    Inst.addOperand(MCOperand::createImm(-ShiftedVal->first));
    Inst.addOperand(MCOperand::createImm(ShiftedVal->second));
  } else
    llvm_unreachable("Not a shifted negative immediate")::llvm::llvm_unreachable_internal("Not a shifted negative immediate"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1709
);
}

void addCondCodeOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1713
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getCondCode()));
}

void addAdrpLabelOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1718
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE)
    addExpr(Inst, getImm());
  else
    Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 12));
}

void addAdrLabelOperands(MCInst &Inst, unsigned N) const {
  addImmOperands(Inst, N);
}

template<int Scale>
void addUImm12OffsetOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1732
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());

  if (!MCE) {
    Inst.addOperand(MCOperand::createExpr(getImm()));
    return;
  }
  Inst.addOperand(MCOperand::createImm(MCE->getValue() / Scale));
}

void addUImm6Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1743
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
  Inst.addOperand(MCOperand::createImm(MCE->getValue()));
}

template <int Scale>
void addImmScaledOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1750
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
  Inst.addOperand(MCOperand::createImm(MCE->getValue() / Scale));
}

template <typename T>
void addLogicalImmOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1757
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
  std::make_unsigned_t<T> Val = MCE->getValue();
  uint64_t encoding = AArch64_AM::encodeLogicalImmediate(Val, sizeof(T) * 8);
  Inst.addOperand(MCOperand::createImm(encoding));
}

template <typename T>
void addLogicalImmNotOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1766
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
  std::make_unsigned_t<T> Val = ~MCE->getValue();
  uint64_t encoding = AArch64_AM::encodeLogicalImmediate(Val, sizeof(T) * 8);
  Inst.addOperand(MCOperand::createImm(encoding));
}

void addSIMDImmType10Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1774
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
  uint64_t encoding = AArch64_AM::encodeAdvSIMDModImmType10(MCE->getValue());
  Inst.addOperand(MCOperand::createImm(encoding));
}

void addBranchTarget26Operands(MCInst &Inst, unsigned N) const {
  // Branch operands don't encode the low bits, so shift them off
  // here. If it's a label, however, just put it on directly as there's
  // not enough information now to do anything.
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1784
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE) {
    addExpr(Inst, getImm());
    return;
  }
  assert(MCE && "Invalid constant immediate operand!")(static_cast <bool> (MCE && "Invalid constant immediate operand!"
) ? void (0) : __assert_fail ("MCE && \"Invalid constant immediate operand!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1790
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 2));
}

void addPCRelLabel19Operands(MCInst &Inst, unsigned N) const {
  // Branch operands don't encode the low bits, so shift them off
  // here. If it's a label, however, just put it on directly as there's
  // not enough information now to do anything.
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1798
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE) {
    addExpr(Inst, getImm());
    return;
  }
  assert(MCE && "Invalid constant immediate operand!")(static_cast <bool> (MCE && "Invalid constant immediate operand!"
) ? void (0) : __assert_fail ("MCE && \"Invalid constant immediate operand!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1804
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 2));
}

void addBranchTarget14Operands(MCInst &Inst, unsigned N) const {
  // Branch operands don't encode the low bits, so shift them off
  // here. If it's a label, however, just put it on directly as there's
  // not enough information now to do anything.
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1812
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(getImm());
  if (!MCE) {
    addExpr(Inst, getImm());
    return;
  }
  assert(MCE && "Invalid constant immediate operand!")(static_cast <bool> (MCE && "Invalid constant immediate operand!"
) ? void (0) : __assert_fail ("MCE && \"Invalid constant immediate operand!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1818
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(MCE->getValue() >> 2));
}

void addFPImmOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1823
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(
      AArch64_AM::getFP64Imm(getFPImm().bitcastToAPInt())));
}

void addBarrierOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1829
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getBarrier()));
}

void addBarriernXSOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1834
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getBarrier()));
}

void addMRSSystemRegisterOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1839
, __extension__ __PRETTY_FUNCTION__));

  Inst.addOperand(MCOperand::createImm(SysReg.MRSReg));
}

void addMSRSystemRegisterOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1845
, __extension__ __PRETTY_FUNCTION__));

  Inst.addOperand(MCOperand::createImm(SysReg.MSRReg));
}

void addSystemPStateFieldWithImm0_1Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1851
, __extension__ __PRETTY_FUNCTION__));

  Inst.addOperand(MCOperand::createImm(SysReg.PStateField));
}

void addSVCROperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1857
, __extension__ __PRETTY_FUNCTION__));

  Inst.addOperand(MCOperand::createImm(SVCR.PStateField));
}

void addSystemPStateFieldWithImm0_15Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1863
, __extension__ __PRETTY_FUNCTION__));

  Inst.addOperand(MCOperand::createImm(SysReg.PStateField));
}

void addSysCROperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1869
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getSysCR()));
}

void addPrefetchOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1874
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getPrefetch()));
}

void addPSBHintOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1879
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getPSBHint()));
}

void addBTIHintOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1884
, __extension__ __PRETTY_FUNCTION__));
  Inst.addOperand(MCOperand::createImm(getBTIHint()));
}

void addShifterOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1889
, __extension__ __PRETTY_FUNCTION__));
  unsigned Imm =
      AArch64_AM::getShifterImm(getShiftExtendType(), getShiftExtendAmount());
  Inst.addOperand(MCOperand::createImm(Imm));
}

void addExtendOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1896
, __extension__ __PRETTY_FUNCTION__));
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  if (ET == AArch64_AM::LSL) ET = AArch64_AM::UXTW;
  unsigned Imm = AArch64_AM::getArithExtendImm(ET, getShiftExtendAmount());
  Inst.addOperand(MCOperand::createImm(Imm));
}

void addExtend64Operands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1904
, __extension__ __PRETTY_FUNCTION__));
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  if (ET == AArch64_AM::LSL) ET = AArch64_AM::UXTX;
  unsigned Imm = AArch64_AM::getArithExtendImm(ET, getShiftExtendAmount());
  Inst.addOperand(MCOperand::createImm(Imm));
}

void addMemExtendOperands(MCInst &Inst, unsigned N) const {
  assert(N == 2 && "Invalid number of operands!")(static_cast <bool> (N == 2 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 2 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1912
, __extension__ __PRETTY_FUNCTION__));
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  bool IsSigned = ET == AArch64_AM::SXTW || ET == AArch64_AM::SXTX;
  Inst.addOperand(MCOperand::createImm(IsSigned));
  Inst.addOperand(MCOperand::createImm(getShiftExtendAmount() != 0));
}

// For 8-bit load/store instructions with a register offset, both the
// "DoShift" and "NoShift" variants have a shift of 0. Because of this,
// they're disambiguated by whether the shift was explicit or implicit rather
// than its size.
void addMemExtend8Operands(MCInst &Inst, unsigned N) const {
  assert(N == 2 && "Invalid number of operands!")(static_cast <bool> (N == 2 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 2 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1924
, __extension__ __PRETTY_FUNCTION__));
  AArch64_AM::ShiftExtendType ET = getShiftExtendType();
  bool IsSigned = ET == AArch64_AM::SXTW || ET == AArch64_AM::SXTX;
  Inst.addOperand(MCOperand::createImm(IsSigned));
  Inst.addOperand(MCOperand::createImm(hasShiftExtendAmount()));
}

template<int Shift>
void addMOVZMovAliasOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1933
, __extension__ __PRETTY_FUNCTION__));

  const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
  if (CE) {
    uint64_t Value = CE->getValue();
    Inst.addOperand(MCOperand::createImm((Value >> Shift) & 0xffff));
  } else {
    addExpr(Inst, getImm());
  }
}

template<int Shift>
void addMOVNMovAliasOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1946
, __extension__ __PRETTY_FUNCTION__));

  const MCConstantExpr *CE = cast<MCConstantExpr>(getImm());
  uint64_t Value = CE->getValue();
  Inst.addOperand(MCOperand::createImm((~Value >> Shift) & 0xffff));
}

void addComplexRotationEvenOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1954
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
  Inst.addOperand(MCOperand::createImm(MCE->getValue() / 90));
}

void addComplexRotationOddOperands(MCInst &Inst, unsigned N) const {
  assert(N == 1 && "Invalid number of operands!")(static_cast <bool> (N == 1 && "Invalid number of operands!"
) ? void (0) : __assert_fail ("N == 1 && \"Invalid number of operands!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 1960
, __extension__ __PRETTY_FUNCTION__));
  const MCConstantExpr *MCE = cast<MCConstantExpr>(getImm());
  Inst.addOperand(MCOperand::createImm((MCE->getValue() - 90) / 180));
}

void print(raw_ostream &OS) const override;

static std::unique_ptr<AArch64Operand>
CreateToken(StringRef Str, SMLoc S, MCContext &Ctx, bool IsSuffix = false) {
  auto Op = std::make_unique<AArch64Operand>(k_Token, Ctx);
  Op->Tok.Data = Str.data();
  Op->Tok.Length = Str.size();
  Op->Tok.IsSuffix = IsSuffix;
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateReg(unsigned RegNum, RegKind Kind, SMLoc S, SMLoc E, MCContext &Ctx,
          RegConstraintEqualityTy EqTy = RegConstraintEqualityTy::EqualsReg,
          AArch64_AM::ShiftExtendType ExtTy = AArch64_AM::LSL,
          unsigned ShiftAmount = 0,
          unsigned HasExplicitAmount = false) {
  auto Op = std::make_unique<AArch64Operand>(k_Register, Ctx);
  Op->Reg.RegNum = RegNum;
  Op->Reg.Kind = Kind;
  Op->Reg.ElementWidth = 0;
  Op->Reg.EqualityTy = EqTy;
  Op->Reg.ShiftExtend.Type = ExtTy;
  Op->Reg.ShiftExtend.Amount = ShiftAmount;
  Op->Reg.ShiftExtend.HasExplicitAmount = HasExplicitAmount;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateVectorReg(unsigned RegNum, RegKind Kind, unsigned ElementWidth,
                SMLoc S, SMLoc E, MCContext &Ctx,
                AArch64_AM::ShiftExtendType ExtTy = AArch64_AM::LSL,
                unsigned ShiftAmount = 0,
                unsigned HasExplicitAmount = false) {
  assert((Kind == RegKind::NeonVector || Kind == RegKind::SVEDataVector ||(static_cast <bool> ((Kind == RegKind::NeonVector || Kind
 == RegKind::SVEDataVector || Kind == RegKind::SVEPredicateVector
) && "Invalid vector kind") ? void (0) : __assert_fail
 ("(Kind == RegKind::NeonVector || Kind == RegKind::SVEDataVector || Kind == RegKind::SVEPredicateVector) && \"Invalid vector kind\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 2005
, __extension__ __PRETTY_FUNCTION__))
          Kind == RegKind::SVEPredicateVector) &&(static_cast <bool> ((Kind == RegKind::NeonVector || Kind
 == RegKind::SVEDataVector || Kind == RegKind::SVEPredicateVector
) && "Invalid vector kind") ? void (0) : __assert_fail
 ("(Kind == RegKind::NeonVector || Kind == RegKind::SVEDataVector || Kind == RegKind::SVEPredicateVector) && \"Invalid vector kind\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 2005
, __extension__ __PRETTY_FUNCTION__))
         "Invalid vector kind")(static_cast <bool> ((Kind == RegKind::NeonVector || Kind
 == RegKind::SVEDataVector || Kind == RegKind::SVEPredicateVector
) && "Invalid vector kind") ? void (0) : __assert_fail
 ("(Kind == RegKind::NeonVector || Kind == RegKind::SVEDataVector || Kind == RegKind::SVEPredicateVector) && \"Invalid vector kind\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 2005
, __extension__ __PRETTY_FUNCTION__));
  auto Op = CreateReg(RegNum, Kind, S, E, Ctx, EqualsReg, ExtTy, ShiftAmount,
                      HasExplicitAmount);
  Op->Reg.ElementWidth = ElementWidth;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateVectorList(unsigned RegNum, unsigned Count, unsigned NumElements,
                 unsigned ElementWidth, RegKind RegisterKind, SMLoc S, SMLoc E,
                 MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_VectorList, Ctx);
  Op->VectorList.RegNum = RegNum;
  Op->VectorList.Count = Count;
  Op->VectorList.NumElements = NumElements;
  Op->VectorList.ElementWidth = ElementWidth;
  Op->VectorList.RegisterKind = RegisterKind;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateVectorIndex(int Idx, SMLoc S, SMLoc E, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_VectorIndex, Ctx);
  Op->VectorIndex.Val = Idx;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateMatrixTileList(unsigned RegMask, SMLoc S, SMLoc E, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_MatrixTileList, Ctx);
  Op->MatrixTileList.RegMask = RegMask;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static void ComputeRegsForAlias(unsigned Reg, SmallSet<unsigned, 8> &OutRegs,
                                const unsigned ElementWidth) {
  static std::map<std::pair<unsigned, unsigned>, std::vector<unsigned>>
      RegMap = {
          {{0, AArch64::ZAB0},
           {AArch64::ZAD0, AArch64::ZAD1, AArch64::ZAD2, AArch64::ZAD3,
            AArch64::ZAD4, AArch64::ZAD5, AArch64::ZAD6, AArch64::ZAD7}},
          {{8, AArch64::ZAB0},
           {AArch64::ZAD0, AArch64::ZAD1, AArch64::ZAD2, AArch64::ZAD3,
            AArch64::ZAD4, AArch64::ZAD5, AArch64::ZAD6, AArch64::ZAD7}},
          {{16, AArch64::ZAH0},
           {AArch64::ZAD0, AArch64::ZAD2, AArch64::ZAD4, AArch64::ZAD6}},
          {{16, AArch64::ZAH1},
           {AArch64::ZAD1, AArch64::ZAD3, AArch64::ZAD5, AArch64::ZAD7}},
          {{32, AArch64::ZAS0}, {AArch64::ZAD0, AArch64::ZAD4}},
          {{32, AArch64::ZAS1}, {AArch64::ZAD1, AArch64::ZAD5}},
          {{32, AArch64::ZAS2}, {AArch64::ZAD2, AArch64::ZAD6}},
          {{32, AArch64::ZAS3}, {AArch64::ZAD3, AArch64::ZAD7}},
      };

  if (ElementWidth == 64)
    OutRegs.insert(Reg);
  else {
    std::vector<unsigned> Regs = RegMap[std::make_pair(ElementWidth, Reg)];
    assert(!Regs.empty() && "Invalid tile or element width!")(static_cast <bool> (!Regs.empty() && "Invalid tile or element width!"
) ? void (0) : __assert_fail ("!Regs.empty() && \"Invalid tile or element width!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 2069
, __extension__ __PRETTY_FUNCTION__));
    for (auto OutReg : Regs)
      OutRegs.insert(OutReg);
  }
}

static std::unique_ptr<AArch64Operand> CreateImm(const MCExpr *Val, SMLoc S,
                                                 SMLoc E, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_Immediate, Ctx);
  Op->Imm.Val = Val;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand> CreateShiftedImm(const MCExpr *Val,
                                                        unsigned ShiftAmount,
                                                        SMLoc S, SMLoc E,
                                                        MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_ShiftedImm, Ctx);
  Op->ShiftedImm .Val = Val;
  Op->ShiftedImm.ShiftAmount = ShiftAmount;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateCondCode(AArch64CC::CondCode Code, SMLoc S, SMLoc E, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_CondCode, Ctx);
  Op->CondCode.Code = Code;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateFPImm(APFloat Val, bool IsExact, SMLoc S, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_FPImm, Ctx);
  Op->FPImm.Val = Val.bitcastToAPInt().getSExtValue();
  Op->FPImm.IsExact = IsExact;
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand> CreateBarrier(unsigned Val,
                                                     StringRef Str,
                                                     SMLoc S,
                                                     MCContext &Ctx,
                                                     bool HasnXSModifier) {
  auto Op = std::make_unique<AArch64Operand>(k_Barrier, Ctx);
  Op->Barrier.Val = Val;
  Op->Barrier.Data = Str.data();
  Op->Barrier.Length = Str.size();
  Op->Barrier.HasnXSModifier = HasnXSModifier;
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand> CreateSysReg(StringRef Str, SMLoc S,
                                                    uint32_t MRSReg,
                                                    uint32_t MSRReg,
                                                    uint32_t PStateField,
                                                    MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_SysReg, Ctx);
  Op->SysReg.Data = Str.data();
  Op->SysReg.Length = Str.size();
  Op->SysReg.MRSReg = MRSReg;
  Op->SysReg.MSRReg = MSRReg;
  Op->SysReg.PStateField = PStateField;
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand> CreateSysCR(unsigned Val, SMLoc S,
                                                   SMLoc E, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_SysCR, Ctx);
  Op->SysCRImm.Val = Val;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand> CreatePrefetch(unsigned Val,
                                                      StringRef Str,
                                                      SMLoc S,
                                                      MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_Prefetch, Ctx);
  Op->Prefetch.Val = Val;
  Op->Barrier.Data = Str.data();
  Op->Barrier.Length = Str.size();
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand> CreatePSBHint(unsigned Val,
                                                     StringRef Str,
                                                     SMLoc S,
                                                     MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_PSBHint, Ctx);
  Op->PSBHint.Val = Val;
  Op->PSBHint.Data = Str.data();
  Op->PSBHint.Length = Str.size();
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand> CreateBTIHint(unsigned Val,
                                                     StringRef Str,
                                                     SMLoc S,
                                                     MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_BTIHint, Ctx);
  Op->BTIHint.Val = Val | 32;
  Op->BTIHint.Data = Str.data();
  Op->BTIHint.Length = Str.size();
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateMatrixRegister(unsigned RegNum, unsigned ElementWidth, MatrixKind Kind,
                     SMLoc S, SMLoc E, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_MatrixRegister, Ctx);
  Op->MatrixReg.RegNum = RegNum;
  Op->MatrixReg.ElementWidth = ElementWidth;
  Op->MatrixReg.Kind = Kind;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateSVCR(uint32_t PStateField, StringRef Str, SMLoc S, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_SVCR, Ctx);
  Op->SVCR.PStateField = PStateField;
  Op->SVCR.Data = Str.data();
  Op->SVCR.Length = Str.size();
  Op->StartLoc = S;
  Op->EndLoc = S;
  return Op;
}

static std::unique_ptr<AArch64Operand>
CreateShiftExtend(AArch64_AM::ShiftExtendType ShOp, unsigned Val,
                  bool HasExplicitAmount, SMLoc S, SMLoc E, MCContext &Ctx) {
  auto Op = std::make_unique<AArch64Operand>(k_ShiftExtend, Ctx);
  Op->ShiftExtend.Type = ShOp;
  Op->ShiftExtend.Amount = Val;
  Op->ShiftExtend.HasExplicitAmount = HasExplicitAmount;
  Op->StartLoc = S;
  Op->EndLoc = E;
  return Op;
}
2228};

2230} // end anonymous namespace.

2232void AArch64Operand::print(raw_ostream &OS) const {
switch (Kind) {
case k_FPImm:
  OS << "<fpimm " << getFPImm().bitcastToAPInt().getZExtValue();
  if (!getFPImmIsExact())
    OS << " (inexact)";
  OS << ">";
  break;
case k_Barrier: {
  StringRef Name = getBarrierName();
  if (!Name.empty())
    OS << "<barrier " << Name << ">";
  else
    OS << "<barrier invalid #" << getBarrier() << ">";
  break;
}
case k_Immediate:
  OS << *getImm();
  break;
case k_ShiftedImm: {
  unsigned Shift = getShiftedImmShift();
  OS << "<shiftedimm ";
  OS << *getShiftedImmVal();
  OS << ", lsl #" << AArch64_AM::getShiftValue(Shift) << ">";
  break;
}
case k_CondCode:
  OS << "<condcode " << getCondCode() << ">";
  break;
case k_VectorList: {
  OS << "<vectorlist ";
  unsigned Reg = getVectorListStart();
  for (unsigned i = 0, e = getVectorListCount(); i != e; ++i)
    OS << Reg + i << " ";
  OS << ">";
  break;
}
case k_VectorIndex:
  OS << "<vectorindex " << getVectorIndex() << ">";
  break;
case k_SysReg:
  OS << "<sysreg: " << getSysReg() << '>';
  break;
case k_Token:
  OS << "'" << getToken() << "'";
  break;
case k_SysCR:
  OS << "c" << getSysCR();
  break;
case k_Prefetch: {
  StringRef Name = getPrefetchName();
  if (!Name.empty())
    OS << "<prfop " << Name << ">";
  else
    OS << "<prfop invalid #" << getPrefetch() << ">";
  break;
}
case k_PSBHint:
  OS << getPSBHintName();
  break;
case k_BTIHint:
  OS << getBTIHintName();
  break;
case k_MatrixRegister:
  OS << "<matrix " << getMatrixReg() << ">";
  break;
case k_MatrixTileList: {
  OS << "<matrixlist ";
  unsigned RegMask = getMatrixTileListRegMask();
  unsigned MaxBits = 8;
  for (unsigned I = MaxBits; I > 0; --I)
    OS << ((RegMask & (1 << (I - 1))) >> (I - 1));
  OS << '>';
  break;
}
case k_SVCR: {
  OS << getSVCR();
  break;
}
case k_Register:
  OS << "<register " << getReg() << ">";
  if (!getShiftExtendAmount() && !hasShiftExtendAmount())
    break;
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case k_ShiftExtend:
  OS << "<" << AArch64_AM::getShiftExtendName(getShiftExtendType()) << " #"
     << getShiftExtendAmount();
  if (!hasShiftExtendAmount())
    OS << "<imp>";
  OS << '>';
  break;
}
2324}

2326/// @name Auto-generated Match Functions
2327/// {

2329static unsigned MatchRegisterName(StringRef Name);

2331/// }

2333static unsigned MatchNeonVectorRegName(StringRef Name) {
return StringSwitch<unsigned>(Name.lower())
    .Case("v0", AArch64::Q0)
    .Case("v1", AArch64::Q1)
    .Case("v2", AArch64::Q2)
    .Case("v3", AArch64::Q3)
    .Case("v4", AArch64::Q4)
    .Case("v5", AArch64::Q5)
    .Case("v6", AArch64::Q6)
    .Case("v7", AArch64::Q7)
    .Case("v8", AArch64::Q8)
    .Case("v9", AArch64::Q9)
    .Case("v10", AArch64::Q10)
    .Case("v11", AArch64::Q11)
    .Case("v12", AArch64::Q12)
    .Case("v13", AArch64::Q13)
    .Case("v14", AArch64::Q14)
    .Case("v15", AArch64::Q15)
    .Case("v16", AArch64::Q16)
    .Case("v17", AArch64::Q17)
    .Case("v18", AArch64::Q18)
    .Case("v19", AArch64::Q19)
    .Case("v20", AArch64::Q20)
    .Case("v21", AArch64::Q21)
    .Case("v22", AArch64::Q22)
    .Case("v23", AArch64::Q23)
    .Case("v24", AArch64::Q24)
    .Case("v25", AArch64::Q25)
    .Case("v26", AArch64::Q26)
    .Case("v27", AArch64::Q27)
    .Case("v28", AArch64::Q28)
    .Case("v29", AArch64::Q29)
    .Case("v30", AArch64::Q30)
    .Case("v31", AArch64::Q31)
    .Default(0);
2368}

2370/// Returns an optional pair of (#elements, element-width) if Suffix
2371/// is a valid vector kind. Where the number of elements in a vector
2372/// or the vector width is implicit or explicitly unknown (but still a
2373/// valid suffix kind), 0 is used.
2374static Optional<std::pair<int, int>> parseVectorKind(StringRef Suffix,
                                                   RegKind VectorKind) {
std::pair<int, int> Res = {-1, -1};

switch (VectorKind) {
case RegKind::NeonVector:
  Res =
      StringSwitch<std::pair<int, int>>(Suffix.lower())
          .Case("", {0, 0})
          .Case(".1d", {1, 64})
          .Case(".1q", {1, 128})
          // '.2h' needed for fp16 scalar pairwise reductions
          .Case(".2h", {2, 16})
          .Case(".2s", {2, 32})
          .Case(".2d", {2, 64})
          // '.4b' is another special case for the ARMv8.2a dot product
          // operand
          .Case(".4b", {4, 8})
          .Case(".4h", {4, 16})
          .Case(".4s", {4, 32})
          .Case(".8b", {8, 8})
          .Case(".8h", {8, 16})
          .Case(".16b", {16, 8})
          // Accept the width neutral ones, too, for verbose syntax. If those
          // aren't used in the right places, the token operand won't match so
          // all will work out.
          .Case(".b", {0, 8})
          .Case(".h", {0, 16})
          .Case(".s", {0, 32})
          .Case(".d", {0, 64})
          .Default({-1, -1});
  break;
case RegKind::SVEPredicateVector:
case RegKind::SVEDataVector:
case RegKind::Matrix:
  Res = StringSwitch<std::pair<int, int>>(Suffix.lower())
            .Case("", {0, 0})
            .Case(".b", {0, 8})
            .Case(".h", {0, 16})
            .Case(".s", {0, 32})
            .Case(".d", {0, 64})
            .Case(".q", {0, 128})
            .Default({-1, -1});
  break;
default:
  llvm_unreachable("Unsupported RegKind")::llvm::llvm_unreachable_internal("Unsupported RegKind", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 2419);
}

if (Res == std::make_pair(-1, -1))
  return Optional<std::pair<int, int>>();

return Optional<std::pair<int, int>>(Res);
2426}

2428static bool isValidVectorKind(StringRef Suffix, RegKind VectorKind) {
return parseVectorKind(Suffix, VectorKind).hasValue();
2430}

2432static unsigned matchSVEDataVectorRegName(StringRef Name) {
return StringSwitch<unsigned>(Name.lower())
    .Case("z0", AArch64::Z0)
    .Case("z1", AArch64::Z1)
    .Case("z2", AArch64::Z2)
    .Case("z3", AArch64::Z3)
    .Case("z4", AArch64::Z4)
    .Case("z5", AArch64::Z5)
    .Case("z6", AArch64::Z6)
    .Case("z7", AArch64::Z7)
    .Case("z8", AArch64::Z8)
    .Case("z9", AArch64::Z9)
    .Case("z10", AArch64::Z10)
    .Case("z11", AArch64::Z11)
    .Case("z12", AArch64::Z12)
    .Case("z13", AArch64::Z13)
    .Case("z14", AArch64::Z14)
    .Case("z15", AArch64::Z15)
    .Case("z16", AArch64::Z16)
    .Case("z17", AArch64::Z17)
    .Case("z18", AArch64::Z18)
    .Case("z19", AArch64::Z19)
    .Case("z20", AArch64::Z20)
    .Case("z21", AArch64::Z21)
    .Case("z22", AArch64::Z22)
    .Case("z23", AArch64::Z23)
    .Case("z24", AArch64::Z24)
    .Case("z25", AArch64::Z25)
    .Case("z26", AArch64::Z26)
    .Case("z27", AArch64::Z27)
    .Case("z28", AArch64::Z28)
    .Case("z29", AArch64::Z29)
    .Case("z30", AArch64::Z30)
    .Case("z31", AArch64::Z31)
    .Default(0);
2467}

2469static unsigned matchSVEPredicateVectorRegName(StringRef Name) {
return StringSwitch<unsigned>(Name.lower())
    .Case("p0", AArch64::P0)
    .Case("p1", AArch64::P1)
    .Case("p2", AArch64::P2)
    .Case("p3", AArch64::P3)
    .Case("p4", AArch64::P4)
    .Case("p5", AArch64::P5)
    .Case("p6", AArch64::P6)
    .Case("p7", AArch64::P7)
    .Case("p8", AArch64::P8)
    .Case("p9", AArch64::P9)
    .Case("p10", AArch64::P10)
    .Case("p11", AArch64::P11)
    .Case("p12", AArch64::P12)
    .Case("p13", AArch64::P13)
    .Case("p14", AArch64::P14)
    .Case("p15", AArch64::P15)
    .Default(0);
2488}

2490static unsigned matchMatrixTileListRegName(StringRef Name) {
return StringSwitch<unsigned>(Name.lower())
    .Case("za0.d", AArch64::ZAD0)
    .Case("za1.d", AArch64::ZAD1)
    .Case("za2.d", AArch64::ZAD2)
    .Case("za3.d", AArch64::ZAD3)
    .Case("za4.d", AArch64::ZAD4)
    .Case("za5.d", AArch64::ZAD5)
    .Case("za6.d", AArch64::ZAD6)
    .Case("za7.d", AArch64::ZAD7)
    .Case("za0.s", AArch64::ZAS0)
    .Case("za1.s", AArch64::ZAS1)
    .Case("za2.s", AArch64::ZAS2)
    .Case("za3.s", AArch64::ZAS3)
    .Case("za0.h", AArch64::ZAH0)
    .Case("za1.h", AArch64::ZAH1)
    .Case("za0.b", AArch64::ZAB0)
    .Default(0);
2508}

2510static unsigned matchMatrixRegName(StringRef Name) {
return StringSwitch<unsigned>(Name.lower())
    .Case("za", AArch64::ZA)
    .Case("za0.q", AArch64::ZAQ0)
    .Case("za1.q", AArch64::ZAQ1)
    .Case("za2.q", AArch64::ZAQ2)
    .Case("za3.q", AArch64::ZAQ3)
    .Case("za4.q", AArch64::ZAQ4)
    .Case("za5.q", AArch64::ZAQ5)
    .Case("za6.q", AArch64::ZAQ6)
    .Case("za7.q", AArch64::ZAQ7)
    .Case("za8.q", AArch64::ZAQ8)
    .Case("za9.q", AArch64::ZAQ9)
    .Case("za10.q", AArch64::ZAQ10)
    .Case("za11.q", AArch64::ZAQ11)
    .Case("za12.q", AArch64::ZAQ12)
    .Case("za13.q", AArch64::ZAQ13)
    .Case("za14.q", AArch64::ZAQ14)
    .Case("za15.q", AArch64::ZAQ15)
    .Case("za0.d", AArch64::ZAD0)
    .Case("za1.d", AArch64::ZAD1)
    .Case("za2.d", AArch64::ZAD2)
    .Case("za3.d", AArch64::ZAD3)
    .Case("za4.d", AArch64::ZAD4)
    .Case("za5.d", AArch64::ZAD5)
    .Case("za6.d", AArch64::ZAD6)
    .Case("za7.d", AArch64::ZAD7)
    .Case("za0.s", AArch64::ZAS0)
    .Case("za1.s", AArch64::ZAS1)
    .Case("za2.s", AArch64::ZAS2)
    .Case("za3.s", AArch64::ZAS3)
    .Case("za0.h", AArch64::ZAH0)
    .Case("za1.h", AArch64::ZAH1)
    .Case("za0.b", AArch64::ZAB0)
    .Case("za0h.q", AArch64::ZAQ0)
    .Case("za1h.q", AArch64::ZAQ1)
    .Case("za2h.q", AArch64::ZAQ2)
    .Case("za3h.q", AArch64::ZAQ3)
    .Case("za4h.q", AArch64::ZAQ4)
    .Case("za5h.q", AArch64::ZAQ5)
    .Case("za6h.q", AArch64::ZAQ6)
    .Case("za7h.q", AArch64::ZAQ7)
    .Case("za8h.q", AArch64::ZAQ8)
    .Case("za9h.q", AArch64::ZAQ9)
    .Case("za10h.q", AArch64::ZAQ10)
    .Case("za11h.q", AArch64::ZAQ11)
    .Case("za12h.q", AArch64::ZAQ12)
    .Case("za13h.q", AArch64::ZAQ13)
    .Case("za14h.q", AArch64::ZAQ14)
    .Case("za15h.q", AArch64::ZAQ15)
    .Case("za0h.d", AArch64::ZAD0)
    .Case("za1h.d", AArch64::ZAD1)
    .Case("za2h.d", AArch64::ZAD2)
    .Case("za3h.d", AArch64::ZAD3)
    .Case("za4h.d", AArch64::ZAD4)
    .Case("za5h.d", AArch64::ZAD5)
    .Case("za6h.d", AArch64::ZAD6)
    .Case("za7h.d", AArch64::ZAD7)
    .Case("za0h.s", AArch64::ZAS0)
    .Case("za1h.s", AArch64::ZAS1)
    .Case("za2h.s", AArch64::ZAS2)
    .Case("za3h.s", AArch64::ZAS3)
    .Case("za0h.h", AArch64::ZAH0)
    .Case("za1h.h", AArch64::ZAH1)
    .Case("za0h.b", AArch64::ZAB0)
    .Case("za0v.q", AArch64::ZAQ0)
    .Case("za1v.q", AArch64::ZAQ1)
    .Case("za2v.q", AArch64::ZAQ2)
    .Case("za3v.q", AArch64::ZAQ3)
    .Case("za4v.q", AArch64::ZAQ4)
    .Case("za5v.q", AArch64::ZAQ5)
    .Case("za6v.q", AArch64::ZAQ6)
    .Case("za7v.q", AArch64::ZAQ7)
    .Case("za8v.q", AArch64::ZAQ8)
    .Case("za9v.q", AArch64::ZAQ9)
    .Case("za10v.q", AArch64::ZAQ10)
    .Case("za11v.q", AArch64::ZAQ11)
    .Case("za12v.q", AArch64::ZAQ12)
    .Case("za13v.q", AArch64::ZAQ13)
    .Case("za14v.q", AArch64::ZAQ14)
    .Case("za15v.q", AArch64::ZAQ15)
    .Case("za0v.d", AArch64::ZAD0)
    .Case("za1v.d", AArch64::ZAD1)
    .Case("za2v.d", AArch64::ZAD2)
    .Case("za3v.d", AArch64::ZAD3)
    .Case("za4v.d", AArch64::ZAD4)
    .Case("za5v.d", AArch64::ZAD5)
    .Case("za6v.d", AArch64::ZAD6)
    .Case("za7v.d", AArch64::ZAD7)
    .Case("za0v.s", AArch64::ZAS0)
    .Case("za1v.s", AArch64::ZAS1)
    .Case("za2v.s", AArch64::ZAS2)
    .Case("za3v.s", AArch64::ZAS3)
    .Case("za0v.h", AArch64::ZAH0)
    .Case("za1v.h", AArch64::ZAH1)
    .Case("za0v.b", AArch64::ZAB0)
    .Default(0);
2607}

2609bool AArch64AsmParser::ParseRegister(unsigned &RegNo, SMLoc &StartLoc,
                                   SMLoc &EndLoc) {
return tryParseRegister(RegNo, StartLoc, EndLoc) != MatchOperand_Success;
2612}

2614OperandMatchResultTy AArch64AsmParser::tryParseRegister(unsigned &RegNo,
                                                      SMLoc &StartLoc,
                                                      SMLoc &EndLoc) {
StartLoc = getLoc();
auto Res = tryParseScalarRegister(RegNo);
EndLoc = SMLoc::getFromPointer(getLoc().getPointer() - 1);
return Res;
2621}

2623// Matches a register name or register alias previously defined by '.req'
2624unsigned AArch64AsmParser::matchRegisterNameAlias(StringRef Name,
                                                RegKind Kind) {
unsigned RegNum = 0;
if ((RegNum = matchSVEDataVectorRegName(Name)))
  return Kind == RegKind::SVEDataVector ? RegNum : 0;

if ((RegNum = matchSVEPredicateVectorRegName(Name)))
  return Kind == RegKind::SVEPredicateVector ? RegNum : 0;

if ((RegNum = MatchNeonVectorRegName(Name)))
  return Kind == RegKind::NeonVector ? RegNum : 0;

if ((RegNum = matchMatrixRegName(Name)))
  return Kind == RegKind::Matrix ? RegNum : 0;

// The parsed register must be of RegKind Scalar
if ((RegNum = MatchRegisterName(Name)))
  return Kind == RegKind::Scalar ? RegNum : 0;

if (!RegNum) {
  // Handle a few common aliases of registers.
  if (auto RegNum = StringSwitch<unsigned>(Name.lower())
                  .Case("fp", AArch64::FP)
                  .Case("lr",  AArch64::LR)
                  .Case("x31", AArch64::XZR)
                  .Case("w31", AArch64::WZR)
                  .Default(0))
    return Kind == RegKind::Scalar ? RegNum : 0;

  // Check for aliases registered via .req. Canonicalize to lower case.
  // That's more consistent since register names are case insensitive, and
  // it's how the original entry was passed in from MC/MCParser/AsmParser.
  auto Entry = RegisterReqs.find(Name.lower());
  if (Entry == RegisterReqs.end())
    return 0;

  // set RegNum if the match is the right kind of register
  if (Kind == Entry->getValue().first)
    RegNum = Entry->getValue().second;
}
return RegNum;
2665}

2667/// tryParseScalarRegister - Try to parse a register name. The token must be an
2668/// Identifier when called, and if it is a register name the token is eaten and
2669/// the register is added to the operand list.
2670OperandMatchResultTy
2671AArch64AsmParser::tryParseScalarRegister(unsigned &RegNum) {
const AsmToken &Tok = getTok();
if (Tok.isNot(AsmToken::Identifier))
  return MatchOperand_NoMatch;

std::string lowerCase = Tok.getString().lower();
unsigned Reg = matchRegisterNameAlias(lowerCase, RegKind::Scalar);
if (Reg == 0)
  return MatchOperand_NoMatch;

RegNum = Reg;
Lex(); // Eat identifier token.
return MatchOperand_Success;
2684}

2686/// tryParseSysCROperand - Try to parse a system instruction CR operand name.
2687OperandMatchResultTy
2688AArch64AsmParser::tryParseSysCROperand(OperandVector &Operands) {
SMLoc S = getLoc();

if (getTok().isNot(AsmToken::Identifier)) {
  Error(S, "Expected cN operand where 0 <= N <= 15");
  return MatchOperand_ParseFail;
}

StringRef Tok = getTok().getIdentifier();
if (Tok[0] != 'c' && Tok[0] != 'C') {
  Error(S, "Expected cN operand where 0 <= N <= 15");
  return MatchOperand_ParseFail;
}

uint32_t CRNum;
bool BadNum = Tok.drop_front().getAsInteger(10, CRNum);
if (BadNum || CRNum > 15) {
  Error(S, "Expected cN operand where 0 <= N <= 15");
  return MatchOperand_ParseFail;
}

Lex(); // Eat identifier token.
Operands.push_back(
    AArch64Operand::CreateSysCR(CRNum, S, getLoc(), getContext()));
return MatchOperand_Success;
2713}

2715/// tryParsePrefetch - Try to parse a prefetch operand.
2716template <bool IsSVEPrefetch>
2717OperandMatchResultTy
2718AArch64AsmParser::tryParsePrefetch(OperandVector &Operands) {
SMLoc S = getLoc();
const AsmToken &Tok = getTok();

auto LookupByName = [](StringRef N) {
  if (IsSVEPrefetch) {
    if (auto Res = AArch64SVEPRFM::lookupSVEPRFMByName(N))
      return Optional<unsigned>(Res->Encoding);
  } else if (auto Res = AArch64PRFM::lookupPRFMByName(N))
    return Optional<unsigned>(Res->Encoding);
  return Optional<unsigned>();
};

auto LookupByEncoding = [](unsigned E) {
  if (IsSVEPrefetch) {
    if (auto Res = AArch64SVEPRFM::lookupSVEPRFMByEncoding(E))
      return Optional<StringRef>(Res->Name);
  } else if (auto Res = AArch64PRFM::lookupPRFMByEncoding(E))
    return Optional<StringRef>(Res->Name);
  return Optional<StringRef>();
};
unsigned MaxVal = IsSVEPrefetch ? 15 : 31;

// Either an identifier for named values or a 5-bit immediate.
// Eat optional hash.
if (parseOptionalToken(AsmToken::Hash) ||
    Tok.is(AsmToken::Integer)) {
  const MCExpr *ImmVal;
  if (getParser().parseExpression(ImmVal))
    return MatchOperand_ParseFail;

  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
  if (!MCE) {
    TokError("immediate value expected for prefetch operand");
    return MatchOperand_ParseFail;
  }
  unsigned prfop = MCE->getValue();
  if (prfop > MaxVal) {
    TokError("prefetch operand out of range, [0," + utostr(MaxVal) +
             "] expected");
    return MatchOperand_ParseFail;
  }

  auto PRFM = LookupByEncoding(MCE->getValue());
  Operands.push_back(AArch64Operand::CreatePrefetch(
      prfop, PRFM.getValueOr(""), S, getContext()));
  return MatchOperand_Success;
}

if (Tok.isNot(AsmToken::Identifier)) {
  TokError("prefetch hint expected");
  return MatchOperand_ParseFail;
}

auto PRFM = LookupByName(Tok.getString());
if (!PRFM) {
  TokError("prefetch hint expected");
  return MatchOperand_ParseFail;
}

Operands.push_back(AArch64Operand::CreatePrefetch(
    *PRFM, Tok.getString(), S, getContext()));
Lex(); // Eat identifier token.
return MatchOperand_Success;
2782}

2784/// tryParsePSBHint - Try to parse a PSB operand, mapped to Hint command
2785OperandMatchResultTy
2786AArch64AsmParser::tryParsePSBHint(OperandVector &Operands) {
SMLoc S = getLoc();
const AsmToken &Tok = getTok();
if (Tok.isNot(AsmToken::Identifier)) {
  TokError("invalid operand for instruction");
  return MatchOperand_ParseFail;
}

auto PSB = AArch64PSBHint::lookupPSBByName(Tok.getString());
if (!PSB) {
  TokError("invalid operand for instruction");
  return MatchOperand_ParseFail;
}

Operands.push_back(AArch64Operand::CreatePSBHint(
    PSB->Encoding, Tok.getString(), S, getContext()));
Lex(); // Eat identifier token.
return MatchOperand_Success;
2804}

2806/// tryParseBTIHint - Try to parse a BTI operand, mapped to Hint command
2807OperandMatchResultTy
2808AArch64AsmParser::tryParseBTIHint(OperandVector &Operands) {
SMLoc S = getLoc();
const AsmToken &Tok = getTok();
if (Tok.isNot(AsmToken::Identifier)) {
  TokError("invalid operand for instruction");
  return MatchOperand_ParseFail;
}

auto BTI = AArch64BTIHint::lookupBTIByName(Tok.getString());
if (!BTI) {
  TokError("invalid operand for instruction");
  return MatchOperand_ParseFail;
}

Operands.push_back(AArch64Operand::CreateBTIHint(
    BTI->Encoding, Tok.getString(), S, getContext()));
Lex(); // Eat identifier token.
return MatchOperand_Success;
2826}

2828/// tryParseAdrpLabel - Parse and validate a source label for the ADRP
2829/// instruction.
2830OperandMatchResultTy
2831AArch64AsmParser::tryParseAdrpLabel(OperandVector &Operands) {
SMLoc S = getLoc();
const MCExpr *Expr = nullptr;

if (getTok().is(AsmToken::Hash)) {
  Lex(); // Eat hash token.
}

if (parseSymbolicImmVal(Expr))
  return MatchOperand_ParseFail;

AArch64MCExpr::VariantKind ELFRefKind;
MCSymbolRefExpr::VariantKind DarwinRefKind;
int64_t Addend;
if (classifySymbolRef(Expr, ELFRefKind, DarwinRefKind, Addend)) {
  if (DarwinRefKind == MCSymbolRefExpr::VK_None &&
      ELFRefKind == AArch64MCExpr::VK_INVALID) {
    // No modifier was specified at all; this is the syntax for an ELF basic
    // ADRP relocation (unfortunately).
    Expr =
        AArch64MCExpr::create(Expr, AArch64MCExpr::VK_ABS_PAGE, getContext());
  } else if ((DarwinRefKind == MCSymbolRefExpr::VK_GOTPAGE ||
              DarwinRefKind == MCSymbolRefExpr::VK_TLVPPAGE) &&
             Addend != 0) {
    Error(S, "gotpage label reference not allowed an addend");
    return MatchOperand_ParseFail;
  } else if (DarwinRefKind != MCSymbolRefExpr::VK_PAGE &&
             DarwinRefKind != MCSymbolRefExpr::VK_GOTPAGE &&
             DarwinRefKind != MCSymbolRefExpr::VK_TLVPPAGE &&
             ELFRefKind != AArch64MCExpr::VK_ABS_PAGE_NC &&
             ELFRefKind != AArch64MCExpr::VK_GOT_PAGE &&
             ELFRefKind != AArch64MCExpr::VK_GOT_PAGE_LO15 &&
             ELFRefKind != AArch64MCExpr::VK_GOTTPREL_PAGE &&
             ELFRefKind != AArch64MCExpr::VK_TLSDESC_PAGE) {
    // The operand must be an @page or @gotpage qualified symbolref.
    Error(S, "page or gotpage label reference expected");
    return MatchOperand_ParseFail;
  }
}

// We have either a label reference possibly with addend or an immediate. The
// addend is a raw value here. The linker will adjust it to only reference the
// page.
SMLoc E = SMLoc::getFromPointer(getLoc().getPointer() - 1);
Operands.push_back(AArch64Operand::CreateImm(Expr, S, E, getContext()));

return MatchOperand_Success;
2878}

2880/// tryParseAdrLabel - Parse and validate a source label for the ADR
2881/// instruction.
2882OperandMatchResultTy
2883AArch64AsmParser::tryParseAdrLabel(OperandVector &Operands) {
SMLoc S = getLoc();
const MCExpr *Expr = nullptr;

// Leave anything with a bracket to the default for SVE
if (getTok().is(AsmToken::LBrac))
  return MatchOperand_NoMatch;

if (getTok().is(AsmToken::Hash))
  Lex(); // Eat hash token.

if (parseSymbolicImmVal(Expr))
  return MatchOperand_ParseFail;

AArch64MCExpr::VariantKind ELFRefKind;
MCSymbolRefExpr::VariantKind DarwinRefKind;
int64_t Addend;
if (classifySymbolRef(Expr, ELFRefKind, DarwinRefKind, Addend)) {
  if (DarwinRefKind == MCSymbolRefExpr::VK_None &&
      ELFRefKind == AArch64MCExpr::VK_INVALID) {
    // No modifier was specified at all; this is the syntax for an ELF basic
    // ADR relocation (unfortunately).
    Expr = AArch64MCExpr::create(Expr, AArch64MCExpr::VK_ABS, getContext());
  } else {
    Error(S, "unexpected adr label");
    return MatchOperand_ParseFail;
  }
}

SMLoc E = SMLoc::getFromPointer(getLoc().getPointer() - 1);
Operands.push_back(AArch64Operand::CreateImm(Expr, S, E, getContext()));
return MatchOperand_Success;
2915}

2917/// tryParseFPImm - A floating point immediate expression operand.
2918template<bool AddFPZeroAsLiteral>
2919OperandMatchResultTy
2920AArch64AsmParser::tryParseFPImm(OperandVector &Operands) {
SMLoc S = getLoc();

bool Hash = parseOptionalToken(AsmToken::Hash);

// Handle negation, as that still comes through as a separate token.
bool isNegative = parseOptionalToken(AsmToken::Minus);

const AsmToken &Tok = getTok();
if (!Tok.is(AsmToken::Real) && !Tok.is(AsmToken::Integer)) {
  if (!Hash)
    return MatchOperand_NoMatch;
  TokError("invalid floating point immediate");
  return MatchOperand_ParseFail;
}

// Parse hexadecimal representation.
if (Tok.is(AsmToken::Integer) && Tok.getString().startswith("0x")) {
  if (Tok.getIntVal() > 255 || isNegative) {
    TokError("encoded floating point value out of range");
    return MatchOperand_ParseFail;
  }

  APFloat F((double)AArch64_AM::getFPImmFloat(Tok.getIntVal()));
  Operands.push_back(
      AArch64Operand::CreateFPImm(F, true, S, getContext()));
} else {
  // Parse FP representation.
  APFloat RealVal(APFloat::IEEEdouble());
  auto StatusOrErr =
      RealVal.convertFromString(Tok.getString(), APFloat::rmTowardZero);
  if (errorToBool(StatusOrErr.takeError())) {
    TokError("invalid floating point representation");
    return MatchOperand_ParseFail;
  }

  if (isNegative)
    RealVal.changeSign();

  if (AddFPZeroAsLiteral && RealVal.isPosZero()) {
    Operands.push_back(AArch64Operand::CreateToken("#0", S, getContext()));
    Operands.push_back(AArch64Operand::CreateToken(".0", S, getContext()));
  } else
    Operands.push_back(AArch64Operand::CreateFPImm(
        RealVal, *StatusOrErr == APFloat::opOK, S, getContext()));
}

Lex(); // Eat the token.

return MatchOperand_Success;
2970}

2972/// tryParseImmWithOptionalShift - Parse immediate operand, optionally with
2973/// a shift suffix, for example '#1, lsl #12'.
2974OperandMatchResultTy
2975AArch64AsmParser::tryParseImmWithOptionalShift(OperandVector &Operands) {
SMLoc S = getLoc();

if (getTok().is(AsmToken::Hash))
  Lex(); // Eat '#'
else if (getTok().isNot(AsmToken::Integer))
  // Operand should start from # or should be integer, emit error otherwise.
  return MatchOperand_NoMatch;

const MCExpr *Imm = nullptr;
if (parseSymbolicImmVal(Imm))
  return MatchOperand_ParseFail;
else if (getTok().isNot(AsmToken::Comma)) {
  Operands.push_back(
      AArch64Operand::CreateImm(Imm, S, getLoc(), getContext()));
  return MatchOperand_Success;
}

// Eat ','
Lex();

// The optional operand must be "lsl #N" where N is non-negative.
if (!getTok().is(AsmToken::Identifier) ||
    !getTok().getIdentifier().equals_insensitive("lsl")) {
  Error(getLoc(), "only 'lsl #+N' valid after immediate");
  return MatchOperand_ParseFail;
}

// Eat 'lsl'
Lex();

parseOptionalToken(AsmToken::Hash);

if (getTok().isNot(AsmToken::Integer)) {
  Error(getLoc(), "only 'lsl #+N' valid after immediate");
  return MatchOperand_ParseFail;
}

int64_t ShiftAmount = getTok().getIntVal();

if (ShiftAmount < 0) {
  Error(getLoc(), "positive shift amount required");
  return MatchOperand_ParseFail;
}
Lex(); // Eat the number

// Just in case the optional lsl #0 is used for immediates other than zero.
if (ShiftAmount == 0 && Imm != nullptr) {
  Operands.push_back(
      AArch64Operand::CreateImm(Imm, S, getLoc(), getContext()));
  return MatchOperand_Success;
}

Operands.push_back(AArch64Operand::CreateShiftedImm(Imm, ShiftAmount, S,
                                                    getLoc(), getContext()));
return MatchOperand_Success;
3031}

3033/// parseCondCodeString - Parse a Condition Code string, optionally returning a
3034/// suggestion to help common typos.
3035AArch64CC::CondCode
3036AArch64AsmParser::parseCondCodeString(StringRef Cond, std::string &Suggestion) {
AArch64CC::CondCode CC = StringSwitch<AArch64CC::CondCode>(Cond.lower())
                  .Case("eq", AArch64CC::EQ)
                  .Case("ne", AArch64CC::NE)
                  .Case("cs", AArch64CC::HS)
                  .Case("hs", AArch64CC::HS)
                  .Case("cc", AArch64CC::LO)
                  .Case("lo", AArch64CC::LO)
                  .Case("mi", AArch64CC::MI)
                  .Case("pl", AArch64CC::PL)
                  .Case("vs", AArch64CC::VS)
                  .Case("vc", AArch64CC::VC)
                  .Case("hi", AArch64CC::HI)
                  .Case("ls", AArch64CC::LS)
                  .Case("ge", AArch64CC::GE)
                  .Case("lt", AArch64CC::LT)
                  .Case("gt", AArch64CC::GT)
                  .Case("le", AArch64CC::LE)
                  .Case("al", AArch64CC::AL)
                  .Case("nv", AArch64CC::NV)
                  .Default(AArch64CC::Invalid);

if (CC == AArch64CC::Invalid &&
    getSTI().getFeatureBits()[AArch64::FeatureSVE]) {
  CC = StringSwitch<AArch64CC::CondCode>(Cond.lower())
                  .Case("none",  AArch64CC::EQ)
                  .Case("any",   AArch64CC::NE)
                  .Case("nlast", AArch64CC::HS)
                  .Case("last",  AArch64CC::LO)
                  .Case("first", AArch64CC::MI)
                  .Case("nfrst", AArch64CC::PL)
                  .Case("pmore", AArch64CC::HI)
                  .Case("plast", AArch64CC::LS)
                  .Case("tcont", AArch64CC::GE)
                  .Case("tstop", AArch64CC::LT)
                  .Default(AArch64CC::Invalid);

  if (CC == AArch64CC::Invalid && Cond.lower() == "nfirst")
    Suggestion = "nfrst";
}
return CC;
3077}

3079/// parseCondCode - Parse a Condition Code operand.
3080bool AArch64AsmParser::parseCondCode(OperandVector &Operands,
                                   bool invertCondCode) {
SMLoc S = getLoc();
const AsmToken &Tok = getTok();
assert(Tok.is(AsmToken::Identifier) && "Token is not an Identifier")(static_cast <bool> (Tok.is(AsmToken::Identifier) &&
 "Token is not an Identifier") ? void (0) : __assert_fail ("Tok.is(AsmToken::Identifier) && \"Token is not an Identifier\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 3084
, __extension__ __PRETTY_FUNCTION__));

StringRef Cond = Tok.getString();
std::string Suggestion;
AArch64CC::CondCode CC = parseCondCodeString(Cond, Suggestion);
if (CC == AArch64CC::Invalid) {
  std::string Msg = "invalid condition code";
  if (!Suggestion.empty())
    Msg += ", did you mean " + Suggestion + "?";
  return TokError(Msg);
}
Lex(); // Eat identifier token.

if (invertCondCode) {
  if (CC == AArch64CC::AL || CC == AArch64CC::NV)
    return TokError("condition codes AL and NV are invalid for this instruction");
  CC = AArch64CC::getInvertedCondCode(AArch64CC::CondCode(CC));
}

Operands.push_back(
    AArch64Operand::CreateCondCode(CC, S, getLoc(), getContext()));
return false;
3106}

3108OperandMatchResultTy
3109AArch64AsmParser::tryParseSVCR(OperandVector &Operands) {
const AsmToken &Tok = getTok();
SMLoc S = getLoc();

if (Tok.isNot(AsmToken::Identifier)) {
  TokError("invalid operand for instruction");
  return MatchOperand_ParseFail;
}

unsigned PStateImm = -1;
const auto *SVCR = AArch64SVCR::lookupSVCRByName(Tok.getString());
if (SVCR && SVCR->haveFeatures(getSTI().getFeatureBits()))
  PStateImm = SVCR->Encoding;

Operands.push_back(
    AArch64Operand::CreateSVCR(PStateImm, Tok.getString(), S, getContext()));
Lex(); // Eat identifier token.
return MatchOperand_Success;
3127}

3129OperandMatchResultTy
3130AArch64AsmParser::tryParseMatrixRegister(OperandVector &Operands) {
const AsmToken &Tok = getTok();
SMLoc S = getLoc();

StringRef Name = Tok.getString();

if (Name.equals_insensitive("za")) {
  Lex(); // eat "za"
  Operands.push_back(AArch64Operand::CreateMatrixRegister(
      AArch64::ZA, /*ElementWidth=*/0, MatrixKind::Array, S, getLoc(),
      getContext()));
  if (getLexer().is(AsmToken::LBrac)) {
    // There's no comma after matrix operand, so we can parse the next operand
    // immediately.
    if (parseOperand(Operands, false, false))
      return MatchOperand_NoMatch;
  }
  return MatchOperand_Success;
}

// Try to parse matrix register.
unsigned Reg = matchRegisterNameAlias(Name, RegKind::Matrix);
if (!Reg)
  return MatchOperand_NoMatch;

size_t DotPosition = Name.find('.');
assert(DotPosition != StringRef::npos && "Unexpected register")(static_cast <bool> (DotPosition != StringRef::npos &&
 "Unexpected register") ? void (0) : __assert_fail ("DotPosition != StringRef::npos && \"Unexpected register\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 3156
, __extension__ __PRETTY_FUNCTION__));

StringRef Head = Name.take_front(DotPosition);
StringRef Tail = Name.drop_front(DotPosition);
StringRef RowOrColumn = Head.take_back();

MatrixKind Kind = StringSwitch<MatrixKind>(RowOrColumn)
                      .Case("h", MatrixKind::Row)
                      .Case("v", MatrixKind::Col)
                      .Default(MatrixKind::Tile);

// Next up, parsing the suffix
const auto &KindRes = parseVectorKind(Tail, RegKind::Matrix);
if (!KindRes) {
  TokError("Expected the register to be followed by element width suffix");
  return MatchOperand_ParseFail;
}
unsigned ElementWidth = KindRes->second;

Lex();

Operands.push_back(AArch64Operand::CreateMatrixRegister(
    Reg, ElementWidth, Kind, S, getLoc(), getContext()));

if (getLexer().is(AsmToken::LBrac)) {
  // There's no comma after matrix operand, so we can parse the next operand
  // immediately.
  if (parseOperand(Operands, false, false))
    return MatchOperand_NoMatch;
}
return MatchOperand_Success;
3187}

3189/// tryParseOptionalShift - Some operands take an optional shift argument. Parse
3190/// them if present.
3191OperandMatchResultTy
3192AArch64AsmParser::tryParseOptionalShiftExtend(OperandVector &Operands) {
const AsmToken &Tok = getTok();
std::string LowerID = Tok.getString().lower();
AArch64_AM::ShiftExtendType ShOp =
    StringSwitch<AArch64_AM::ShiftExtendType>(LowerID)
        .Case("lsl", AArch64_AM::LSL)
        .Case("lsr", AArch64_AM::LSR)
        .Case("asr", AArch64_AM::ASR)
        .Case("ror", AArch64_AM::ROR)
        .Case("msl", AArch64_AM::MSL)
        .Case("uxtb", AArch64_AM::UXTB)
        .Case("uxth", AArch64_AM::UXTH)
        .Case("uxtw", AArch64_AM::UXTW)
        .Case("uxtx", AArch64_AM::UXTX)
        .Case("sxtb", AArch64_AM::SXTB)
        .Case("sxth", AArch64_AM::SXTH)
        .Case("sxtw", AArch64_AM::SXTW)
        .Case("sxtx", AArch64_AM::SXTX)
        .Default(AArch64_AM::InvalidShiftExtend);

if (ShOp == AArch64_AM::InvalidShiftExtend)
  return MatchOperand_NoMatch;

SMLoc S = Tok.getLoc();
Lex();

bool Hash = parseOptionalToken(AsmToken::Hash);

if (!Hash && getLexer().isNot(AsmToken::Integer)) {
  if (ShOp == AArch64_AM::LSL || ShOp == AArch64_AM::LSR ||
      ShOp == AArch64_AM::ASR || ShOp == AArch64_AM::ROR ||
      ShOp == AArch64_AM::MSL) {
    // We expect a number here.
    TokError("expected #imm after shift specifier");
    return MatchOperand_ParseFail;
  }

  // "extend" type operations don't need an immediate, #0 is implicit.
  SMLoc E = SMLoc::getFromPointer(getLoc().getPointer() - 1);
  Operands.push_back(
      AArch64Operand::CreateShiftExtend(ShOp, 0, false, S, E, getContext()));
  return MatchOperand_Success;
}

// Make sure we do actually have a number, identifier or a parenthesized
// expression.
SMLoc E = getLoc();
if (!getTok().is(AsmToken::Integer) && !getTok().is(AsmToken::LParen) &&
    !getTok().is(AsmToken::Identifier)) {
  Error(E, "expected integer shift amount");
  return MatchOperand_ParseFail;
}

const MCExpr *ImmVal;
if (getParser().parseExpression(ImmVal))
  return MatchOperand_ParseFail;

const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
if (!MCE) {
  Error(E, "expected constant '#imm' after shift specifier");
  return MatchOperand_ParseFail;
}

E = SMLoc::getFromPointer(getLoc().getPointer() - 1);
Operands.push_back(AArch64Operand::CreateShiftExtend(
    ShOp, MCE->getValue(), true, S, E, getContext()));
return MatchOperand_Success;
3259}

3261static const struct Extension {
const char *Name;
const FeatureBitset Features;
3264} ExtensionMap[] = {
  {"crc", {AArch64::FeatureCRC}},
  {"sm4", {AArch64::FeatureSM4}},
  {"sha3", {AArch64::FeatureSHA3}},
  {"sha2", {AArch64::FeatureSHA2}},
  {"aes", {AArch64::FeatureAES}},
  {"crypto", {AArch64::FeatureCrypto}},
  {"fp", {AArch64::FeatureFPARMv8}},
  {"simd", {AArch64::FeatureNEON}},
  {"ras", {AArch64::FeatureRAS}},
  {"lse", {AArch64::FeatureLSE}},
  {"predres", {AArch64::FeaturePredRes}},
  {"ccdp", {AArch64::FeatureCacheDeepPersist}},
  {"mte", {AArch64::FeatureMTE}},
  {"memtag", {AArch64::FeatureMTE}},
  {"tlb-rmi", {AArch64::FeatureTLB_RMI}},
  {"pan", {AArch64::FeaturePAN}},
  {"pan-rwv", {AArch64::FeaturePAN_RWV}},
  {"ccpp", {AArch64::FeatureCCPP}},
  {"rcpc", {AArch64::FeatureRCPC}},
  {"rng", {AArch64::FeatureRandGen}},
  {"sve", {AArch64::FeatureSVE}},
  {"sve2", {AArch64::FeatureSVE2}},
  {"sve2-aes", {AArch64::FeatureSVE2AES}},
  {"sve2-sm4", {AArch64::FeatureSVE2SM4}},
  {"sve2-sha3", {AArch64::FeatureSVE2SHA3}},
  {"sve2-bitperm", {AArch64::FeatureSVE2BitPerm}},
  {"ls64", {AArch64::FeatureLS64}},
  {"xs", {AArch64::FeatureXS}},
  {"pauth", {AArch64::FeaturePAuth}},
  {"flagm", {AArch64::FeatureFlagM}},
  {"rme", {AArch64::FeatureRME}},
  {"sme", {AArch64::FeatureSME}},
  {"sme-f64", {AArch64::FeatureSMEF64}},
  {"sme-i64", {AArch64::FeatureSMEI64}},
  {"hbc", {AArch64::FeatureHBC}},
  {"mops", {AArch64::FeatureMOPS}},
  // FIXME: Unsupported extensions
  {"lor", {}},
  {"rdma", {}},
  {"profile", {}},
3305};

3307static void setRequiredFeatureString(FeatureBitset FBS, std::string &Str) {
if (FBS[AArch64::HasV8_0aOps])
  Str += "ARMv8a";
if (FBS[AArch64::HasV8_1aOps])
  Str += "ARMv8.1a";
else if (FBS[AArch64::HasV8_2aOps])
  Str += "ARMv8.2a";
else if (FBS[AArch64::HasV8_3aOps])
  Str += "ARMv8.3a";
else if (FBS[AArch64::HasV8_4aOps])
  Str += "ARMv8.4a";
else if (FBS[AArch64::HasV8_5aOps])
  Str += "ARMv8.5a";
else if (FBS[AArch64::HasV8_6aOps])
  Str += "ARMv8.6a";
else if (FBS[AArch64::HasV8_7aOps])
  Str += "ARMv8.7a";
else if (FBS[AArch64::HasV8_8aOps])
  Str += "ARMv8.8a";
else if (FBS[AArch64::HasV9_0aOps])
  Str += "ARMv9-a";
else if (FBS[AArch64::HasV9_1aOps])
  Str += "ARMv9.1a";
else if (FBS[AArch64::HasV9_2aOps])
  Str += "ARMv9.2a";
else if (FBS[AArch64::HasV9_3aOps])
  Str += "ARMv9.3a";
else if (FBS[AArch64::HasV8_0rOps])
  Str += "ARMv8r";
else {
  SmallVector<std::string, 2> ExtMatches;
  for (const auto& Ext : ExtensionMap) {
    // Use & in case multiple features are enabled
    if ((FBS & Ext.Features) != FeatureBitset())
      ExtMatches.push_back(Ext.Name);
  }
  Str += !ExtMatches.empty() ? llvm::join(ExtMatches, ", ") : "(unknown)";
}
3345}

3347void AArch64AsmParser::createSysAlias(uint16_t Encoding, OperandVector &Operands,
                                    SMLoc S) {
const uint16_t Op2 = Encoding & 7;
const uint16_t Cm = (Encoding & 0x78) >> 3;
const uint16_t Cn = (Encoding & 0x780) >> 7;
const uint16_t Op1 = (Encoding & 0x3800) >> 11;

const MCExpr *Expr = MCConstantExpr::create(Op1, getContext());

Operands.push_back(
    AArch64Operand::CreateImm(Expr, S, getLoc(), getContext()));
Operands.push_back(
    AArch64Operand::CreateSysCR(Cn, S, getLoc(), getContext()));
Operands.push_back(
    AArch64Operand::CreateSysCR(Cm, S, getLoc(), getContext()));
Expr = MCConstantExpr::create(Op2, getContext());
Operands.push_back(
    AArch64Operand::CreateImm(Expr, S, getLoc(), getContext()));
3365}

3367/// parseSysAlias - The IC, DC, AT, and TLBI instructions are simple aliases for
3368/// the SYS instruction. Parse them specially so that we create a SYS MCInst.
3369bool AArch64AsmParser::parseSysAlias(StringRef Name, SMLoc NameLoc,
                                 OperandVector &Operands) {
if (Name.contains('.'))
  return TokError("invalid operand");

Mnemonic = Name;
Operands.push_back(AArch64Operand::CreateToken("sys", NameLoc, getContext()));

const AsmToken &Tok = getTok();
StringRef Op = Tok.getString();
SMLoc S = Tok.getLoc();

if (Mnemonic == "ic") {
  const AArch64IC::IC *IC = AArch64IC::lookupICByName(Op);
  if (!IC)
    return TokError("invalid operand for IC instruction");
  else if (!IC->haveFeatures(getSTI().getFeatureBits())) {
    std::string Str("IC " + std::string(IC->Name) + " requires: ");
    setRequiredFeatureString(IC->getRequiredFeatures(), Str);
    return TokError(Str);
  }
  createSysAlias(IC->Encoding, Operands, S);
} else if (Mnemonic == "dc") {
  const AArch64DC::DC *DC = AArch64DC::lookupDCByName(Op);
  if (!DC)
    return TokError("invalid operand for DC instruction");
  else if (!DC->haveFeatures(getSTI().getFeatureBits())) {
    std::string Str("DC " + std::string(DC->Name) + " requires: ");
    setRequiredFeatureString(DC->getRequiredFeatures(), Str);
    return TokError(Str);
  }
  createSysAlias(DC->Encoding, Operands, S);
} else if (Mnemonic == "at") {
  const AArch64AT::AT *AT = AArch64AT::lookupATByName(Op);
  if (!AT)
    return TokError("invalid operand for AT instruction");
  else if (!AT->haveFeatures(getSTI().getFeatureBits())) {
    std::string Str("AT " + std::string(AT->Name) + " requires: ");
    setRequiredFeatureString(AT->getRequiredFeatures(), Str);
    return TokError(Str);
  }
  createSysAlias(AT->Encoding, Operands, S);
} else if (Mnemonic == "tlbi") {
  const AArch64TLBI::TLBI *TLBI = AArch64TLBI::lookupTLBIByName(Op);
  if (!TLBI)
    return TokError("invalid operand for TLBI instruction");
  else if (!TLBI->haveFeatures(getSTI().getFeatureBits())) {
    std::string Str("TLBI " + std::string(TLBI->Name) + " requires: ");
    setRequiredFeatureString(TLBI->getRequiredFeatures(), Str);
    return TokError(Str);
  }
  createSysAlias(TLBI->Encoding, Operands, S);
} else if (Mnemonic == "cfp" || Mnemonic == "dvp" || Mnemonic == "cpp") {
  const AArch64PRCTX::PRCTX *PRCTX = AArch64PRCTX::lookupPRCTXByName(Op);
  if (!PRCTX)
    return TokError("invalid operand for prediction restriction instruction");
  else if (!PRCTX->haveFeatures(getSTI().getFeatureBits())) {
    std::string Str(
        Mnemonic.upper() + std::string(PRCTX->Name) + " requires: ");
    setRequiredFeatureString(PRCTX->getRequiredFeatures(), Str);
    return TokError(Str);
  }
  uint16_t PRCTX_Op2 =
    Mnemonic == "cfp" ? 4 :
    Mnemonic == "dvp" ? 5 :
    Mnemonic == "cpp" ? 7 :
    0;
  assert(PRCTX_Op2 && "Invalid mnemonic for prediction restriction instruction")(static_cast <bool> (PRCTX_Op2 && "Invalid mnemonic for prediction restriction instruction"
) ? void (0) : __assert_fail ("PRCTX_Op2 && \"Invalid mnemonic for prediction restriction instruction\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 3436
, __extension__ __PRETTY_FUNCTION__));
  createSysAlias(PRCTX->Encoding << 3 | PRCTX_Op2 , Operands, S);
}

Lex(); // Eat operand.

bool ExpectRegister = (Op.lower().find("all") == StringRef::npos);
bool HasRegister = false;

// Check for the optional register operand.
if (parseOptionalToken(AsmToken::Comma)) {
  if (Tok.isNot(AsmToken::Identifier) || parseRegister(Operands))
    return TokError("expected register operand");
  HasRegister = true;
}

if (ExpectRegister && !HasRegister)
  return TokError("specified " + Mnemonic + " op requires a register");
else if (!ExpectRegister && HasRegister)
  return TokError("specified " + Mnemonic + " op does not use a register");

if (parseToken(AsmToken::EndOfStatement, "unexpected token in argument list"))
  return true;

return false;
3461}

3463OperandMatchResultTy
3464AArch64AsmParser::tryParseBarrierOperand(OperandVector &Operands) {
MCAsmParser &Parser = getParser();
const AsmToken &Tok = getTok();

if (Mnemonic == "tsb" && Tok.isNot(AsmToken::Identifier)) {
  TokError("'csync' operand expected");
  return MatchOperand_ParseFail;
} else if (parseOptionalToken(AsmToken::Hash) || Tok.is(AsmToken::Integer)) {
  // Immediate operand.
  const MCExpr *ImmVal;
  SMLoc ExprLoc = getLoc();
  AsmToken IntTok = Tok;
  if (getParser().parseExpression(ImmVal))
    return MatchOperand_ParseFail;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
  if (!MCE) {
    Error(ExprLoc, "immediate value expected for barrier operand");
    return MatchOperand_ParseFail;
  }
  int64_t Value = MCE->getValue();
  if (Mnemonic == "dsb" && Value > 15) {
    // This case is a no match here, but it might be matched by the nXS
    // variant. Deliberately not unlex the optional '#' as it is not necessary
    // to characterize an integer immediate.
    Parser.getLexer().UnLex(IntTok);
    return MatchOperand_NoMatch;
  }
  if (Value < 0 || Value > 15) {
    Error(ExprLoc, "barrier operand out of range");
    return MatchOperand_ParseFail;
  }
  auto DB = AArch64DB::lookupDBByEncoding(Value);
  Operands.push_back(AArch64Operand::CreateBarrier(Value, DB ? DB->Name : "",
                                                   ExprLoc, getContext(),
                                                   false /*hasnXSModifier*/));
  return MatchOperand_Success;
}

if (Tok.isNot(AsmToken::Identifier)) {
  TokError("invalid operand for instruction");
  return MatchOperand_ParseFail;
}

StringRef Operand = Tok.getString();
auto TSB = AArch64TSB::lookupTSBByName(Operand);
auto DB = AArch64DB::lookupDBByName(Operand);
// The only valid named option for ISB is 'sy'
if (Mnemonic == "isb" && (!DB || DB->Encoding != AArch64DB::sy)) {
  TokError("'sy' or #imm operand expected");
  return MatchOperand_ParseFail;
// The only valid named option for TSB is 'csync'
} else if (Mnemonic == "tsb" && (!TSB || TSB->Encoding != AArch64TSB::csync)) {
  TokError("'csync' operand expected");
  return MatchOperand_ParseFail;
} else if (!DB && !TSB) {
  if (Mnemonic == "dsb") {
    // This case is a no match here, but it might be matched by the nXS
    // variant.
    return MatchOperand_NoMatch;
  }
  TokError("invalid barrier option name");
  return MatchOperand_ParseFail;
}

Operands.push_back(AArch64Operand::CreateBarrier(
    DB ? DB->Encoding : TSB->Encoding, Tok.getString(), getLoc(),
    getContext(), false /*hasnXSModifier*/));
Lex(); // Consume the option

return MatchOperand_Success;
3534}

3536OperandMatchResultTy
3537AArch64AsmParser::tryParseBarriernXSOperand(OperandVector &Operands) {
const AsmToken &Tok = getTok();

assert(Mnemonic == "dsb" && "Instruction does not accept nXS operands")(static_cast <bool> (Mnemonic == "dsb" && "Instruction does not accept nXS operands"
) ? void (0) : __assert_fail ("Mnemonic == \"dsb\" && \"Instruction does not accept nXS operands\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 3540
, __extension__ __PRETTY_FUNCTION__));
if (Mnemonic != "dsb")
  return MatchOperand_ParseFail;

if (parseOptionalToken(AsmToken::Hash) || Tok.is(AsmToken::Integer)) {
  // Immediate operand.
  const MCExpr *ImmVal;
  SMLoc ExprLoc = getLoc();
  if (getParser().parseExpression(ImmVal))
    return MatchOperand_ParseFail;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
  if (!MCE) {
    Error(ExprLoc, "immediate value expected for barrier operand");
    return MatchOperand_ParseFail;
  }
  int64_t Value = MCE->getValue();
  // v8.7-A DSB in the nXS variant accepts only the following immediate
  // values: 16, 20, 24, 28.
  if (Value != 16 && Value != 20 && Value != 24 && Value != 28) {
    Error(ExprLoc, "barrier operand out of range");
    return MatchOperand_ParseFail;
  }
  auto DB = AArch64DBnXS::lookupDBnXSByImmValue(Value);
  Operands.push_back(AArch64Operand::CreateBarrier(DB->Encoding, DB->Name,
                                                   ExprLoc, getContext(),
                                                   true /*hasnXSModifier*/));
  return MatchOperand_Success;
}

if (Tok.isNot(AsmToken::Identifier)) {
  TokError("invalid operand for instruction");
  return MatchOperand_ParseFail;
}

StringRef Operand = Tok.getString();
auto DB = AArch64DBnXS::lookupDBnXSByName(Operand);

if (!DB) {
  TokError("invalid barrier option name");
  return MatchOperand_ParseFail;
}

Operands.push_back(
    AArch64Operand::CreateBarrier(DB->Encoding, Tok.getString(), getLoc(),
                                  getContext(), true /*hasnXSModifier*/));
Lex(); // Consume the option

return MatchOperand_Success;
3588}

3590OperandMatchResultTy
3591AArch64AsmParser::tryParseSysReg(OperandVector &Operands) {
const AsmToken &Tok = getTok();

if (Tok.isNot(AsmToken::Identifier))
  return MatchOperand_NoMatch;

if (AArch64SVCR::lookupSVCRByName(Tok.getString()))
  return MatchOperand_NoMatch;

int MRSReg, MSRReg;
auto SysReg = AArch64SysReg::lookupSysRegByName(Tok.getString());
if (SysReg && SysReg->haveFeatures(getSTI().getFeatureBits())) {
  MRSReg = SysReg->Readable ? SysReg->Encoding : -1;
  MSRReg = SysReg->Writeable ? SysReg->Encoding : -1;
} else
  MRSReg = MSRReg = AArch64SysReg::parseGenericRegister(Tok.getString());

auto PState = AArch64PState::lookupPStateByName(Tok.getString());
unsigned PStateImm = -1;
if (PState && PState->haveFeatures(getSTI().getFeatureBits()))
  PStateImm = PState->Encoding;

Operands.push_back(
    AArch64Operand::CreateSysReg(Tok.getString(), getLoc(), MRSReg, MSRReg,
                                 PStateImm, getContext()));
Lex(); // Eat identifier

return MatchOperand_Success;
3619}

3621/// tryParseNeonVectorRegister - Parse a vector register operand.
3622bool AArch64AsmParser::tryParseNeonVectorRegister(OperandVector &Operands) {
if (getTok().isNot(AsmToken::Identifier))
  return true;

SMLoc S = getLoc();
// Check for a vector register specifier first.
StringRef Kind;
unsigned Reg;
OperandMatchResultTy Res =
    tryParseVectorRegister(Reg, Kind, RegKind::NeonVector);
if (Res != MatchOperand_Success)
  return true;

const auto &KindRes = parseVectorKind(Kind, RegKind::NeonVector);
if (!KindRes)
  return true;

unsigned ElementWidth = KindRes->second;
Operands.push_back(
    AArch64Operand::CreateVectorReg(Reg, RegKind::NeonVector, ElementWidth,
                                    S, getLoc(), getContext()));

// If there was an explicit qualifier, that goes on as a literal text
// operand.
if (!Kind.empty())
  Operands.push_back(AArch64Operand::CreateToken(Kind, S, getContext()));

return tryParseVectorIndex(Operands) == MatchOperand_ParseFail;
3650}

3652OperandMatchResultTy
3653AArch64AsmParser::tryParseVectorIndex(OperandVector &Operands) {
SMLoc SIdx = getLoc();
if (parseOptionalToken(AsmToken::LBrac)) {
  const MCExpr *ImmVal;
  if (getParser().parseExpression(ImmVal))
    return MatchOperand_NoMatch;
  const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal);
  if (!MCE) {
    TokError("immediate value expected for vector index");
    return MatchOperand_ParseFail;;
  }

  SMLoc E = getLoc();

  if (parseToken(AsmToken::RBrac, "']' expected"))
    return MatchOperand_ParseFail;;

  Operands.push_back(AArch64Operand::CreateVectorIndex(MCE->getValue(), SIdx,
                                                       E, getContext()));
  return MatchOperand_Success;
}

return MatchOperand_NoMatch;
3676}

3678// tryParseVectorRegister - Try to parse a vector register name with
3679// optional kind specifier. If it is a register specifier, eat the token
3680// and return it.
3681OperandMatchResultTy
3682AArch64AsmParser::tryParseVectorRegister(unsigned &Reg, StringRef &Kind,
                                       RegKind MatchKind) {
const AsmToken &Tok = getTok();

if (Tok.isNot(AsmToken::Identifier))
  return MatchOperand_NoMatch;

StringRef Name = Tok.getString();
// If there is a kind specifier, it's separated from the register name by
// a '.'.
size_t Start = 0, Next = Name.find('.');
StringRef Head = Name.slice(Start, Next);
unsigned RegNum = matchRegisterNameAlias(Head, MatchKind);

if (RegNum) {
  if (Next != StringRef::npos) {
    Kind = Name.slice(Next, StringRef::npos);
    if (!isValidVectorKind(Kind, MatchKind)) {
      TokError("invalid vector kind qualifier");
      return MatchOperand_ParseFail;
    }
  }
  Lex(); // Eat the register token.

  Reg = RegNum;
  return MatchOperand_Success;
}

return MatchOperand_NoMatch;
3711}

3713/// tryParseSVEPredicateVector - Parse a SVE predicate register operand.
3714OperandMatchResultTy
3715AArch64AsmParser::tryParseSVEPredicateVector(OperandVector &Operands) {
// Check for a SVE predicate register specifier first.
const SMLoc S = getLoc();
StringRef Kind;
unsigned RegNum;
auto Res = tryParseVectorRegister(RegNum, Kind, RegKind::SVEPredicateVector);
if (Res != MatchOperand_Success)
  return Res;

const auto &KindRes = parseVectorKind(Kind, RegKind::SVEPredicateVector);
if (!KindRes)
  return MatchOperand_NoMatch;

unsigned ElementWidth = KindRes->second;
Operands.push_back(AArch64Operand::CreateVectorReg(
    RegNum, RegKind::SVEPredicateVector, ElementWidth, S,
    getLoc(), getContext()));

if (getLexer().is(AsmToken::LBrac)) {
  // Indexed predicate, there's no comma so try parse the next operand
  // immediately.
  if (parseOperand(Operands, false, false))
    return MatchOperand_NoMatch;
}

// Not all predicates are followed by a '/m' or '/z'.
if (getTok().isNot(AsmToken::Slash))
  return MatchOperand_Success;

// But when they do they shouldn't have an element type suffix.
if (!Kind.empty()) {
  Error(S, "not expecting size suffix");
  return MatchOperand_ParseFail;
}

// Add a literal slash as operand
Operands.push_back(AArch64Operand::CreateToken("/", getLoc(), getContext()));

Lex(); // Eat the slash.

// Zeroing or merging?
auto Pred = getTok().getString().lower();
if (Pred != "z" && Pred != "m") {
  Error(getLoc(), "expecting 'm' or 'z' predication");
  return MatchOperand_ParseFail;
}

// Add zero/merge token.
const char *ZM = Pred == "z" ? "z" : "m";
Operands.push_back(AArch64Operand::CreateToken(ZM, getLoc(), getContext()));

Lex(); // Eat zero/merge token.
return MatchOperand_Success;
3768}

3770/// parseRegister - Parse a register operand.
3771bool AArch64AsmParser::parseRegister(OperandVector &Operands) {
// Try for a Neon vector register.
if (!tryParseNeonVectorRegister(Operands))
  return false;

// Otherwise try for a scalar register.
if (tryParseGPROperand<false>(Operands) == MatchOperand_Success)
  return false;

return true;
3781}

3783bool AArch64AsmParser::parseSymbolicImmVal(const MCExpr *&ImmVal) {
bool HasELFModifier = false;
AArch64MCExpr::VariantKind RefKind;

if (parseOptionalToken(AsmToken::Colon)) {
  HasELFModifier = true;

  if (getTok().isNot(AsmToken::Identifier))
    return TokError("expect relocation specifier in operand after ':'");

  std::string LowerCase = getTok().getIdentifier().lower();
  RefKind = StringSwitch<AArch64MCExpr::VariantKind>(LowerCase)
                .Case("lo12", AArch64MCExpr::VK_LO12)
                .Case("abs_g3", AArch64MCExpr::VK_ABS_G3)
                .Case("abs_g2", AArch64MCExpr::VK_ABS_G2)
                .Case("abs_g2_s", AArch64MCExpr::VK_ABS_G2_S)
                .Case("abs_g2_nc", AArch64MCExpr::VK_ABS_G2_NC)
                .Case("abs_g1", AArch64MCExpr::VK_ABS_G1)
                .Case("abs_g1_s", AArch64MCExpr::VK_ABS_G1_S)
                .Case("abs_g1_nc", AArch64MCExpr::VK_ABS_G1_NC)
                .Case("abs_g0", AArch64MCExpr::VK_ABS_G0)
                .Case("abs_g0_s", AArch64MCExpr::VK_ABS_G0_S)
                .Case("abs_g0_nc", AArch64MCExpr::VK_ABS_G0_NC)
                .Case("prel_g3", AArch64MCExpr::VK_PREL_G3)
                .Case("prel_g2", AArch64MCExpr::VK_PREL_G2)
                .Case("prel_g2_nc", AArch64MCExpr::VK_PREL_G2_NC)
                .Case("prel_g1", AArch64MCExpr::VK_PREL_G1)
                .Case("prel_g1_nc", AArch64MCExpr::VK_PREL_G1_NC)
                .Case("prel_g0", AArch64MCExpr::VK_PREL_G0)
                .Case("prel_g0_nc", AArch64MCExpr::VK_PREL_G0_NC)
                .Case("dtprel_g2", AArch64MCExpr::VK_DTPREL_G2)
                .Case("dtprel_g1", AArch64MCExpr::VK_DTPREL_G1)
                .Case("dtprel_g1_nc", AArch64MCExpr::VK_DTPREL_G1_NC)
                .Case("dtprel_g0", AArch64MCExpr::VK_DTPREL_G0)
                .Case("dtprel_g0_nc", AArch64MCExpr::VK_DTPREL_G0_NC)
                .Case("dtprel_hi12", AArch64MCExpr::VK_DTPREL_HI12)
                .Case("dtprel_lo12", AArch64MCExpr::VK_DTPREL_LO12)
                .Case("dtprel_lo12_nc", AArch64MCExpr::VK_DTPREL_LO12_NC)
                .Case("pg_hi21_nc", AArch64MCExpr::VK_ABS_PAGE_NC)
                .Case("tprel_g2", AArch64MCExpr::VK_TPREL_G2)
                .Case("tprel_g1", AArch64MCExpr::VK_TPREL_G1)
                .Case("tprel_g1_nc", AArch64MCExpr::VK_TPREL_G1_NC)
                .Case("tprel_g0", AArch64MCExpr::VK_TPREL_G0)
                .Case("tprel_g0_nc", AArch64MCExpr::VK_TPREL_G0_NC)
                .Case("tprel_hi12", AArch64MCExpr::VK_TPREL_HI12)
                .Case("tprel_lo12", AArch64MCExpr::VK_TPREL_LO12)
                .Case("tprel_lo12_nc", AArch64MCExpr::VK_TPREL_LO12_NC)
                .Case("tlsdesc_lo12", AArch64MCExpr::VK_TLSDESC_LO12)
                .Case("got", AArch64MCExpr::VK_GOT_PAGE)
                .Case("gotpage_lo15", AArch64MCExpr::VK_GOT_PAGE_LO15)
                .Case("got_lo12", AArch64MCExpr::VK_GOT_LO12)
                .Case("gottprel", AArch64MCExpr::VK_GOTTPREL_PAGE)
                .Case("gottprel_lo12", AArch64MCExpr::VK_GOTTPREL_LO12_NC)
                .Case("gottprel_g1", AArch64MCExpr::VK_GOTTPREL_G1)
                .Case("gottprel_g0_nc", AArch64MCExpr::VK_GOTTPREL_G0_NC)
                .Case("tlsdesc", AArch64MCExpr::VK_TLSDESC_PAGE)
                .Case("secrel_lo12", AArch64MCExpr::VK_SECREL_LO12)
                .Case("secrel_hi12", AArch64MCExpr::VK_SECREL_HI12)
                .Default(AArch64MCExpr::VK_INVALID);

  if (RefKind == AArch64MCExpr::VK_INVALID)
    return TokError("expect relocation specifier in operand after ':'");

  Lex(); // Eat identifier

  if (parseToken(AsmToken::Colon, "expect ':' after relocation specifier"))
    return true;
}

if (getParser().parseExpression(ImmVal))
  return true;

if (HasELFModifier)
  ImmVal = AArch64MCExpr::create(ImmVal, RefKind, getContext());

return false;
3859}

3861OperandMatchResultTy
3862AArch64AsmParser::tryParseMatrixTileList(OperandVector &Operands) {
if (getTok().isNot(AsmToken::LCurly))
  return MatchOperand_NoMatch;

auto ParseMatrixTile = [this](unsigned &Reg, unsigned &ElementWidth) {
  StringRef Name = getTok().getString();
  size_t DotPosition = Name.find('.');
  if (DotPosition == StringRef::npos)
    return MatchOperand_NoMatch;

  unsigned RegNum = matchMatrixTileListRegName(Name);
  if (!RegNum)
    return MatchOperand_NoMatch;

  StringRef Tail = Name.drop_front(DotPosition);
  const Optional<std::pair<int, int>> &KindRes =
      parseVectorKind(Tail, RegKind::Matrix);
  if (!KindRes) {
    TokError("Expected the register to be followed by element width suffix");
    return MatchOperand_ParseFail;
  }
  ElementWidth = KindRes->second;
  Reg = RegNum;
  Lex(); // Eat the register.
  return MatchOperand_Success;
};

SMLoc S = getLoc();
auto LCurly = getTok();
Lex(); // Eat left bracket token.

// Empty matrix list
if (parseOptionalToken(AsmToken::RCurly)) {
  Operands.push_back(AArch64Operand::CreateMatrixTileList(
      /*RegMask=*/0, S, getLoc(), getContext()));
  return MatchOperand_Success;
}

// Try parse {za} alias early
if (getTok().getString().equals_insensitive("za")) {
  Lex(); // Eat 'za'

  if (parseToken(AsmToken::RCurly, "'}' expected"))
    return MatchOperand_ParseFail;

  Operands.push_back(AArch64Operand::CreateMatrixTileList(
      /*RegMask=*/0xFF, S, getLoc(), getContext()));
  return MatchOperand_Success;
}

SMLoc TileLoc = getLoc();

unsigned FirstReg, ElementWidth;
auto ParseRes = ParseMatrixTile(FirstReg, ElementWidth);
if (ParseRes != MatchOperand_Success) {
  getLexer().UnLex(LCurly);
  return ParseRes;
}

const MCRegisterInfo *RI = getContext().getRegisterInfo();

unsigned PrevReg = FirstReg;

SmallSet<unsigned, 8> DRegs;
AArch64Operand::ComputeRegsForAlias(FirstReg, DRegs, ElementWidth);

SmallSet<unsigned, 8> SeenRegs;
SeenRegs.insert(FirstReg);

while (parseOptionalToken(AsmToken::Comma)) {
  TileLoc = getLoc();
  unsigned Reg, NextElementWidth;
  ParseRes = ParseMatrixTile(Reg, NextElementWidth);
  if (ParseRes != MatchOperand_Success)
    return ParseRes;

  // Element size must match on all regs in the list.
  if (ElementWidth != NextElementWidth) {
    Error(TileLoc, "mismatched register size suffix");
    return MatchOperand_ParseFail;
  }

  if (RI->getEncodingValue(Reg) <= (RI->getEncodingValue(PrevReg)))
    Warning(TileLoc, "tile list not in ascending order");

  if (SeenRegs.contains(Reg))
    Warning(TileLoc, "duplicate tile in list");
  else {
    SeenRegs.insert(Reg);
    AArch64Operand::ComputeRegsForAlias(Reg, DRegs, ElementWidth);
  }

  PrevReg = Reg;
}

if (parseToken(AsmToken::RCurly, "'}' expected"))
  return MatchOperand_ParseFail;

unsigned RegMask = 0;
for (auto Reg : DRegs)
  RegMask |= 0x1 << (RI->getEncodingValue(Reg) -
                     RI->getEncodingValue(AArch64::ZAD0));
Operands.push_back(
    AArch64Operand::CreateMatrixTileList(RegMask, S, getLoc(), getContext()));

return MatchOperand_Success;
3968}

3970template <RegKind VectorKind>
3971OperandMatchResultTy
3972AArch64AsmParser::tryParseVectorList(OperandVector &Operands,
                                   bool ExpectMatch) {
MCAsmParser &Parser = getParser();
if (!getTok().is(AsmToken::LCurly))
  return MatchOperand_NoMatch;

// Wrapper around parse function
auto ParseVector = [this](unsigned &Reg, StringRef &Kind, SMLoc Loc,
                          bool NoMatchIsError) {
  auto RegTok = getTok();
  auto ParseRes = tryParseVectorRegister(Reg, Kind, VectorKind);
  if (ParseRes == MatchOperand_Success) {
    if (parseVectorKind(Kind, VectorKind))
      return ParseRes;
    llvm_unreachable("Expected a valid vector kind")::llvm::llvm_unreachable_internal("Expected a valid vector kind"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 3986
);
  }

  if (RegTok.isNot(AsmToken::Identifier) ||
      ParseRes == MatchOperand_ParseFail ||
      (ParseRes == MatchOperand_NoMatch && NoMatchIsError &&
       !RegTok.getString().startswith_insensitive("za"))) {
    Error(Loc, "vector register expected");
    return MatchOperand_ParseFail;
  }

  return MatchOperand_NoMatch;
};

SMLoc S = getLoc();
auto LCurly = getTok();
Lex(); // Eat left bracket token.

StringRef Kind;
unsigned FirstReg;
auto ParseRes = ParseVector(FirstReg, Kind, getLoc(), ExpectMatch);

// Put back the original left bracket if there was no match, so that
// different types of list-operands can be matched (e.g. SVE, Neon).
if (ParseRes == MatchOperand_NoMatch)
  Parser.getLexer().UnLex(LCurly);

if (ParseRes != MatchOperand_Success)
  return ParseRes;

int64_t PrevReg = FirstReg;
unsigned Count = 1;

if (parseOptionalToken(AsmToken::Minus)) {
  SMLoc Loc = getLoc();
  StringRef NextKind;

  unsigned Reg;
  ParseRes = ParseVector(Reg, NextKind, getLoc(), true);
  if (ParseRes != MatchOperand_Success)
    return ParseRes;

  // Any Kind suffices must match on all regs in the list.
  if (Kind != NextKind) {
    Error(Loc, "mismatched register size suffix");
    return MatchOperand_ParseFail;
  }

  unsigned Space = (PrevReg < Reg) ? (Reg - PrevReg) : (Reg + 32 - PrevReg);

  if (Space == 0 || Space > 3) {
    Error(Loc, "invalid number of vectors");
    return MatchOperand_ParseFail;
  }

  Count += Space;
}
else {
  while (parseOptionalToken(AsmToken::Comma)) {
    SMLoc Loc = getLoc();
    StringRef NextKind;
    unsigned Reg;
    ParseRes = ParseVector(Reg, NextKind, getLoc(), true);
    if (ParseRes != MatchOperand_Success)
      return ParseRes;

    // Any Kind suffices must match on all regs in the list.
    if (Kind != NextKind) {
      Error(Loc, "mismatched register size suffix");
      return MatchOperand_ParseFail;
    }

    // Registers must be incremental (with wraparound at 31)
    if (getContext().getRegisterInfo()->getEncodingValue(Reg) !=
        (getContext().getRegisterInfo()->getEncodingValue(PrevReg) + 1) % 32) {
      Error(Loc, "registers must be sequential");
      return MatchOperand_ParseFail;
    }

    PrevReg = Reg;
    ++Count;
  }
}

if (parseToken(AsmToken::RCurly, "'}' expected"))
  return MatchOperand_ParseFail;

if (Count > 4) {
  Error(S, "invalid number of vectors");
  return MatchOperand_ParseFail;
}

unsigned NumElements = 0;
unsigned ElementWidth = 0;
if (!Kind.empty()) {
  if (const auto &VK = parseVectorKind(Kind, VectorKind))
    std::tie(NumElements, ElementWidth) = *VK;
}

Operands.push_back(AArch64Operand::CreateVectorList(
    FirstReg, Count, NumElements, ElementWidth, VectorKind, S, getLoc(),
    getContext()));

return MatchOperand_Success;
4090}

4092/// parseNeonVectorList - Parse a vector list operand for AdvSIMD instructions.
4093bool AArch64AsmParser::parseNeonVectorList(OperandVector &Operands) {
auto ParseRes = tryParseVectorList<RegKind::NeonVector>(Operands, true);
if (ParseRes != MatchOperand_Success)
  return true;

return tryParseVectorIndex(Operands) == MatchOperand_ParseFail;
4099}

4101OperandMatchResultTy
4102AArch64AsmParser::tryParseGPR64sp0Operand(OperandVector &Operands) {
SMLoc StartLoc = getLoc();

unsigned RegNum;
OperandMatchResultTy Res = tryParseScalarRegister(RegNum);
if (Res != MatchOperand_Success)
  return Res;

if (!parseOptionalToken(AsmToken::Comma)) {
  Operands.push_back(AArch64Operand::CreateReg(
      RegNum, RegKind::Scalar, StartLoc, getLoc(), getContext()));
  return MatchOperand_Success;
}

parseOptionalToken(AsmToken::Hash);

if (getTok().isNot(AsmToken::Integer)) {
  Error(getLoc(), "index must be absent or #0");
  return MatchOperand_ParseFail;
}

const MCExpr *ImmVal;
if (getParser().parseExpression(ImmVal) || !isa<MCConstantExpr>(ImmVal) ||
    cast<MCConstantExpr>(ImmVal)->getValue() != 0) {
  Error(getLoc(), "index must be absent or #0");
  return MatchOperand_ParseFail;
}

Operands.push_back(AArch64Operand::CreateReg(
    RegNum, RegKind::Scalar, StartLoc, getLoc(), getContext()));
return MatchOperand_Success;
4133}

4135template <bool ParseShiftExtend, RegConstraintEqualityTy EqTy>
4136OperandMatchResultTy
4137AArch64AsmParser::tryParseGPROperand(OperandVector &Operands) {
SMLoc StartLoc = getLoc();

unsigned RegNum;
OperandMatchResultTy Res = tryParseScalarRegister(RegNum);
if (Res != MatchOperand_Success)
  return Res;

// No shift/extend is the default.
if (!ParseShiftExtend || getTok().isNot(AsmToken::Comma)) {
  Operands.push_back(AArch64Operand::CreateReg(
      RegNum, RegKind::Scalar, StartLoc, getLoc(), getContext(), EqTy));
  return MatchOperand_Success;
}

// Eat the comma
Lex();

// Match the shift
SmallVector<std::unique_ptr<MCParsedAsmOperand>, 1> ExtOpnd;
Res = tryParseOptionalShiftExtend(ExtOpnd);
if (Res != MatchOperand_Success)
  return Res;

auto Ext = static_cast<AArch64Operand*>(ExtOpnd.back().get());
Operands.push_back(AArch64Operand::CreateReg(
    RegNum, RegKind::Scalar, StartLoc, Ext->getEndLoc(), getContext(), EqTy,
    Ext->getShiftExtendType(), Ext->getShiftExtendAmount(),
    Ext->hasShiftExtendAmount()));

return MatchOperand_Success;
4168}

4170bool AArch64AsmParser::parseOptionalMulOperand(OperandVector &Operands) {
MCAsmParser &Parser = getParser();

// Some SVE instructions have a decoration after the immediate, i.e.
// "mul vl". We parse them here and add tokens, which must be present in the
// asm string in the tablegen instruction.
bool NextIsVL =
    Parser.getLexer().peekTok().getString().equals_insensitive("vl");
bool NextIsHash = Parser.getLexer().peekTok().is(AsmToken::Hash);
if (!getTok().getString().equals_insensitive("mul") ||
    !(NextIsVL || NextIsHash))
  return true;

Operands.push_back(
    AArch64Operand::CreateToken("mul", getLoc(), getContext()));
Lex(); // Eat the "mul"

if (NextIsVL) {
  Operands.push_back(
      AArch64Operand::CreateToken("vl", getLoc(), getContext()));
  Lex(); // Eat the "vl"
  return false;
}

if (NextIsHash) {
  Lex(); // Eat the #
  SMLoc S = getLoc();

  // Parse immediate operand.
  const MCExpr *ImmVal;
  if (!Parser.parseExpression(ImmVal))
    if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(ImmVal)) {
      Operands.push_back(AArch64Operand::CreateImm(
          MCConstantExpr::create(MCE->getValue(), getContext()), S, getLoc(),
          getContext()));
      return MatchOperand_Success;
    }
}

return Error(getLoc(), "expected 'vl' or '#<imm>'");
4210}

4212bool AArch64AsmParser::parseKeywordOperand(OperandVector &Operands) {
auto Tok = getTok();
if (Tok.isNot(AsmToken::Identifier))
  return true;

auto Keyword = Tok.getString();
Keyword = StringSwitch<StringRef>(Keyword.lower())
              .Case("sm", "sm")
              .Case("za", "za")
              .Default(Keyword);
Operands.push_back(
    AArch64Operand::CreateToken(Keyword, Tok.getLoc(), getContext()));

Lex();
return false;
4227}

4229/// parseOperand - Parse a arm instruction operand.  For now this parses the
4230/// operand regardless of the mnemonic.
4231bool AArch64AsmParser::parseOperand(OperandVector &Operands, bool isCondCode,
                                bool invertCondCode) {
MCAsmParser &Parser = getParser();

OperandMatchResultTy ResTy =
    MatchOperandParserImpl(Operands, Mnemonic, /*ParseForAllFeatures=*/ true);

// Check if the current operand has a custom associated parser, if so, try to
// custom parse the operand, or fallback to the general approach.
if (ResTy == MatchOperand_Success)
  return false;
// If there wasn't a custom match, try the generic matcher below. Otherwise,
// there was a match, but an error occurred, in which case, just return that
// the operand parsing failed.
if (ResTy == MatchOperand_ParseFail)
  return true;

// Nothing custom, so do general case parsing.
SMLoc S, E;
switch (getLexer().getKind()) {
default: {
  SMLoc S = getLoc();
  const MCExpr *Expr;
  if (parseSymbolicImmVal(Expr))
    return Error(S, "invalid operand");

  SMLoc E = SMLoc::getFromPointer(getLoc().getPointer() - 1);
  Operands.push_back(AArch64Operand::CreateImm(Expr, S, E, getContext()));
  return false;
}
case AsmToken::LBrac: {
  Operands.push_back(
      AArch64Operand::CreateToken("[", getLoc(), getContext()));
  Lex(); // Eat '['

  // There's no comma after a '[', so we can parse the next operand
  // immediately.
  return parseOperand(Operands, false, false);
}
case AsmToken::LCurly: {
  if (!parseNeonVectorList(Operands))
    return false;

  Operands.push_back(
      AArch64Operand::CreateToken("{", getLoc(), getContext()));
  Lex(); // Eat '{'

  // There's no comma after a '{', so we can parse the next operand
  // immediately.
  return parseOperand(Operands, false, false);
}
case AsmToken::Identifier: {
  // If we're expecting a Condition Code operand, then just parse that.
  if (isCondCode)
    return parseCondCode(Operands, invertCondCode);

  // If it's a register name, parse it.
  if (!parseRegister(Operands))
    return false;

  // See if this is a "mul vl" decoration or "mul #<int>" operand used
  // by SVE instructions.
  if (!parseOptionalMulOperand(Operands))
    return false;

  // If this is an "smstart" or "smstop" instruction, parse its special
  // keyword operand as an identifier.
  if (Mnemonic == "smstart" || Mnemonic == "smstop")
    return parseKeywordOperand(Operands);

  // This could be an optional "shift" or "extend" operand.
  OperandMatchResultTy GotShift = tryParseOptionalShiftExtend(Operands);
  // We can only continue if no tokens were eaten.
  if (GotShift != MatchOperand_NoMatch)
    return GotShift;

  // If this is a two-word mnemonic, parse its special keyword
  // operand as an identifier.
  if (Mnemonic == "brb")
    return parseKeywordOperand(Operands);

  // This was not a register so parse other operands that start with an
  // identifier (like labels) as expressions and create them as immediates.
  const MCExpr *IdVal;
  S = getLoc();
  if (getParser().parseExpression(IdVal))
    return true;
  E = SMLoc::getFromPointer(getLoc().getPointer() - 1);
  Operands.push_back(AArch64Operand::CreateImm(IdVal, S, E, getContext()));
  return false;
}
case AsmToken::Integer:
case AsmToken::Real:
case AsmToken::Hash: {
  // #42 -> immediate.
  S = getLoc();

  parseOptionalToken(AsmToken::Hash);

  // Parse a negative sign
  bool isNegative = false;
  if (getTok().is(AsmToken::Minus)) {
    isNegative = true;
    // We need to consume this token only when we have a Real, otherwise
    // we let parseSymbolicImmVal take care of it
    if (Parser.getLexer().peekTok().is(AsmToken::Real))
      Lex();
  }

  // The only Real that should come through here is a literal #0.0 for
  // the fcmp[e] r, #0.0 instructions. They expect raw token operands,
  // so convert the value.
  const AsmToken &Tok = getTok();
  if (Tok.is(AsmToken::Real)) {
    APFloat RealVal(APFloat::IEEEdouble(), Tok.getString());
    uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
    if (Mnemonic != "fcmp" && Mnemonic != "fcmpe" && Mnemonic != "fcmeq" &&
        Mnemonic != "fcmge" && Mnemonic != "fcmgt" && Mnemonic != "fcmle" &&
        Mnemonic != "fcmlt" && Mnemonic != "fcmne")
      return TokError("unexpected floating point literal");
    else if (IntVal != 0 || isNegative)
      return TokError("expected floating-point constant #0.0");
    Lex(); // Eat the token.

    Operands.push_back(AArch64Operand::CreateToken("#0", S, getContext()));
    Operands.push_back(AArch64Operand::CreateToken(".0", S, getContext()));
    return false;
  }

  const MCExpr *ImmVal;
  if (parseSymbolicImmVal(ImmVal))
    return true;

  E = SMLoc::getFromPointer(getLoc().getPointer() - 1);
  Operands.push_back(AArch64Operand::CreateImm(ImmVal, S, E, getContext()));
  return false;
}
case AsmToken::Equal: {
  SMLoc Loc = getLoc();
  if (Mnemonic != "ldr") // only parse for ldr pseudo (e.g. ldr r0, =val)
    return TokError("unexpected token in operand");
  Lex(); // Eat '='
  const MCExpr *SubExprVal;
  if (getParser().parseExpression(SubExprVal))
    return true;

  if (Operands.size() < 2 ||
      !static_cast<AArch64Operand &>(*Operands[1]).isScalarReg())
    return Error(Loc, "Only valid when first operand is register");

  bool IsXReg =
      AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
          Operands[1]->getReg());

  MCContext& Ctx = getContext();
  E = SMLoc::getFromPointer(Loc.getPointer() - 1);
  // If the op is an imm and can be fit into a mov, then replace ldr with mov.
  if (isa<MCConstantExpr>(SubExprVal)) {
    uint64_t Imm = (cast<MCConstantExpr>(SubExprVal))->getValue();
    uint32_t ShiftAmt = 0, MaxShiftAmt = IsXReg ? 48 : 16;
    while(Imm > 0xFFFF && countTrailingZeros(Imm) >= 16) {
      ShiftAmt += 16;
      Imm >>= 16;
    }
    if (ShiftAmt <= MaxShiftAmt && Imm <= 0xFFFF) {
      Operands[0] = AArch64Operand::CreateToken("movz", Loc, Ctx);
      Operands.push_back(AArch64Operand::CreateImm(
          MCConstantExpr::create(Imm, Ctx), S, E, Ctx));
      if (ShiftAmt)
        Operands.push_back(AArch64Operand::CreateShiftExtend(AArch64_AM::LSL,
                   ShiftAmt, true, S, E, Ctx));
      return false;
    }
    APInt Simm = APInt(64, Imm << ShiftAmt);
    // check if the immediate is an unsigned or signed 32-bit int for W regs
    if (!IsXReg && !(Simm.isIntN(32) || Simm.isSignedIntN(32)))
      return Error(Loc, "Immediate too large for register");
  }
  // If it is a label or an imm that cannot fit in a movz, put it into CP.
  const MCExpr *CPLoc =
      getTargetStreamer().addConstantPoolEntry(SubExprVal, IsXReg ? 8 : 4, Loc);
  Operands.push_back(AArch64Operand::CreateImm(CPLoc, S, E, Ctx));
  return false;
}
}
4416}

4418bool AArch64AsmParser::parseImmExpr(int64_t &Out) {
const MCExpr *Expr = nullptr;
SMLoc L = getLoc();
if (check(getParser().parseExpression(Expr), L, "expected expression"))
  return true;
const MCConstantExpr *Value = dyn_cast_or_null<MCConstantExpr>(Expr);
if (check(!Value, L, "expected constant expression"))
  return true;
Out = Value->getValue();
return false;
4428}

4430bool AArch64AsmParser::parseComma() {
if (check(getTok().isNot(AsmToken::Comma), getLoc(), "expected comma"))
  return true;
// Eat the comma
Lex();
return false;
4436}

4438bool AArch64AsmParser::parseRegisterInRange(unsigned &Out, unsigned Base,
                                          unsigned First, unsigned Last) {
unsigned Reg;
SMLoc Start, End;
if (check(ParseRegister(Reg, Start, End), getLoc(), "expected register"))
  return true;

// Special handling for FP and LR; they aren't linearly after x28 in
// the registers enum.
unsigned RangeEnd = Last;
if (Base == AArch64::X0) {
  if (Last == AArch64::FP) {
    RangeEnd = AArch64::X28;
    if (Reg == AArch64::FP) {
      Out = 29;
      return false;
    }
  }
  if (Last == AArch64::LR) {
    RangeEnd = AArch64::X28;
    if (Reg == AArch64::FP) {
      Out = 29;
      return false;
    } else if (Reg == AArch64::LR) {
      Out = 30;
      return false;
    }
  }
}

if (check(Reg < First || Reg > RangeEnd, Start,
          Twine("expected register in range ") +
              AArch64InstPrinter::getRegisterName(First) + " to " +
              AArch64InstPrinter::getRegisterName(Last)))
  return true;
Out = Reg - Base;
return false;
4475}

4477bool AArch64AsmParser::regsEqual(const MCParsedAsmOperand &Op1,
                               const MCParsedAsmOperand &Op2) const {
auto &AOp1 = static_cast<const AArch64Operand&>(Op1);
auto &AOp2 = static_cast<const AArch64Operand&>(Op2);
if (AOp1.getRegEqualityTy() == RegConstraintEqualityTy::EqualsReg &&
    AOp2.getRegEqualityTy() == RegConstraintEqualityTy::EqualsReg)
  return MCTargetAsmParser::regsEqual(Op1, Op2);

assert(AOp1.isScalarReg() && AOp2.isScalarReg() &&(static_cast <bool> (AOp1.isScalarReg() && AOp2
.isScalarReg() && "Testing equality of non-scalar registers not supported"
) ? void (0) : __assert_fail ("AOp1.isScalarReg() && AOp2.isScalarReg() && \"Testing equality of non-scalar registers not supported\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 4486
, __extension__ __PRETTY_FUNCTION__))
       "Testing equality of non-scalar registers not supported")(static_cast <bool> (AOp1.isScalarReg() && AOp2
.isScalarReg() && "Testing equality of non-scalar registers not supported"
) ? void (0) : __assert_fail ("AOp1.isScalarReg() && AOp2.isScalarReg() && \"Testing equality of non-scalar registers not supported\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 4486
, __extension__ __PRETTY_FUNCTION__));

// Check if a registers match their sub/super register classes.
if (AOp1.getRegEqualityTy() == EqualsSuperReg)
  return getXRegFromWReg(Op1.getReg()) == Op2.getReg();
if (AOp1.getRegEqualityTy() == EqualsSubReg)
  return getWRegFromXReg(Op1.getReg()) == Op2.getReg();
if (AOp2.getRegEqualityTy() == EqualsSuperReg)
  return getXRegFromWReg(Op2.getReg()) == Op1.getReg();
if (AOp2.getRegEqualityTy() == EqualsSubReg)
  return getWRegFromXReg(Op2.getReg()) == Op1.getReg();

return false;
4499}

4501/// ParseInstruction - Parse an AArch64 instruction mnemonic followed by its
4502/// operands.
4503bool AArch64AsmParser::ParseInstruction(ParseInstructionInfo &Info,
                                      StringRef Name, SMLoc NameLoc,
                                      OperandVector &Operands) {
Name = StringSwitch<StringRef>(Name.lower())
           .Case("beq", "b.eq")
           .Case("bne", "b.ne")
           .Case("bhs", "b.hs")
           .Case("bcs", "b.cs")
           .Case("blo", "b.lo")
           .Case("bcc", "b.cc")
           .Case("bmi", "b.mi")
           .Case("bpl", "b.pl")
           .Case("bvs", "b.vs")
           .Case("bvc", "b.vc")
           .Case("bhi", "b.hi")
           .Case("bls", "b.ls")
           .Case("bge", "b.ge")
           .Case("blt", "b.lt")
           .Case("bgt", "b.gt")
           .Case("ble", "b.le")
           .Case("bal", "b.al")
           .Case("bnv", "b.nv")
           .Default(Name);

// First check for the AArch64-specific .req directive.
if (getTok().is(AsmToken::Identifier) &&
    getTok().getIdentifier().lower() == ".req") {
  parseDirectiveReq(Name, NameLoc);
  // We always return 'error' for this, as we're done with this
  // statement and don't need to match the 'instruction."
  return true;
}

// Create the leading tokens for the mnemonic, split by '.' characters.
size_t Start = 0, Next = Name.find('.');
StringRef Head = Name.slice(Start, Next);

// IC, DC, AT, TLBI and Prediction invalidation instructions are aliases for
// the SYS instruction.
if (Head == "ic" || Head == "dc" || Head == "at" || Head == "tlbi" ||
    Head == "cfp" || Head == "dvp" || Head == "cpp")
  return parseSysAlias(Head, NameLoc, Operands);

Operands.push_back(AArch64Operand::CreateToken(Head, NameLoc, getContext()));
Mnemonic = Head;

// Handle condition codes for a branch mnemonic
if ((Head == "b" || Head == "bc") && Next != StringRef::npos) {
  Start = Next;
  Next = Name.find('.', Start + 1);
  Head = Name.slice(Start + 1, Next);

  SMLoc SuffixLoc = SMLoc::getFromPointer(NameLoc.getPointer() +
                                          (Head.data() - Name.data()));
  std::string Suggestion;
  AArch64CC::CondCode CC = parseCondCodeString(Head, Suggestion);
  if (CC == AArch64CC::Invalid) {
    std::string Msg = "invalid condition code";
    if (!Suggestion.empty())
      Msg += ", did you mean " + Suggestion + "?";
    return Error(SuffixLoc, Msg);
  }
  Operands.push_back(AArch64Operand::CreateToken(".", SuffixLoc, getContext(),
                                                 /*IsSuffix=*/true));
  Operands.push_back(
      AArch64Operand::CreateCondCode(CC, NameLoc, NameLoc, getContext()));
}

// Add the remaining tokens in the mnemonic.
while (Next != StringRef::npos) {
  Start = Next;
  Next = Name.find('.', Start + 1);
  Head = Name.slice(Start, Next);
  SMLoc SuffixLoc = SMLoc::getFromPointer(NameLoc.getPointer() +
                                          (Head.data() - Name.data()) + 1);
  Operands.push_back(AArch64Operand::CreateToken(
      Head, SuffixLoc, getContext(), /*IsSuffix=*/true));
}

// Conditional compare instructions have a Condition Code operand, which needs
// to be parsed and an immediate operand created.
bool condCodeFourthOperand =
    (Head == "ccmp" || Head == "ccmn" || Head == "fccmp" ||
     Head == "fccmpe" || Head == "fcsel" || Head == "csel" ||
     Head == "csinc" || Head == "csinv" || Head == "csneg");

// These instructions are aliases to some of the conditional select
// instructions. However, the condition code is inverted in the aliased
// instruction.
//
// FIXME: Is this the correct way to handle these? Or should the parser
//        generate the aliased instructions directly?
bool condCodeSecondOperand = (Head == "cset" || Head == "csetm");
bool condCodeThirdOperand =
    (Head == "cinc" || Head == "cinv" || Head == "cneg");

// Read the remaining operands.
if (getLexer().isNot(AsmToken::EndOfStatement)) {

  unsigned N = 1;
  do {
    // Parse and remember the operand.
    if (parseOperand(Operands, (N == 4 && condCodeFourthOperand) ||
                                   (N == 3 && condCodeThirdOperand) ||
                                   (N == 2 && condCodeSecondOperand),
                     condCodeSecondOperand || condCodeThirdOperand)) {
      return true;
    }

    // After successfully parsing some operands there are three special cases
    // to consider (i.e. notional operands not separated by commas). Two are
    // due to memory specifiers:
    //  + An RBrac will end an address for load/store/prefetch
    //  + An '!' will indicate a pre-indexed operation.
    //
    // And a further case is '}', which ends a group of tokens specifying the
    // SME accumulator array 'ZA' or tile vector, i.e.
    //
    //   '{ ZA }' or '{ <ZAt><HV>.<BHSDQ>[<Wv>, #<imm>] }'
    //
    // It's someone else's responsibility to make sure these tokens are sane
    // in the given context!

    if (parseOptionalToken(AsmToken::RBrac))
      Operands.push_back(
          AArch64Operand::CreateToken("]", getLoc(), getContext()));
    if (parseOptionalToken(AsmToken::Exclaim))
      Operands.push_back(
          AArch64Operand::CreateToken("!", getLoc(), getContext()));
    if (parseOptionalToken(AsmToken::RCurly))
      Operands.push_back(
          AArch64Operand::CreateToken("}", getLoc(), getContext()));

    ++N;
  } while (parseOptionalToken(AsmToken::Comma));
}

if (parseToken(AsmToken::EndOfStatement, "unexpected token in argument list"))
  return true;

return false;
4644}

4646static inline bool isMatchingOrAlias(unsigned ZReg, unsigned Reg) {
assert((ZReg >= AArch64::Z0) && (ZReg <= AArch64::Z31))(static_cast <bool> ((ZReg >= AArch64::Z0) &&
 (ZReg <= AArch64::Z31)) ? void (0) : __assert_fail ("(ZReg >= AArch64::Z0) && (ZReg <= AArch64::Z31)"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 4647
, __extension__ __PRETTY_FUNCTION__));
return (ZReg == ((Reg - AArch64::B0) + AArch64::Z0)) ||
       (ZReg == ((Reg - AArch64::H0) + AArch64::Z0)) ||
       (ZReg == ((Reg - AArch64::S0) + AArch64::Z0)) ||
       (ZReg == ((Reg - AArch64::D0) + AArch64::Z0)) ||
       (ZReg == ((Reg - AArch64::Q0) + AArch64::Z0)) ||
       (ZReg == ((Reg - AArch64::Z0) + AArch64::Z0));
4654}

4656// FIXME: This entire function is a giant hack to provide us with decent
4657// operand range validation/diagnostics until TableGen/MC can be extended
4658// to support autogeneration of this kind of validation.
4659bool AArch64AsmParser::validateInstruction(MCInst &Inst, SMLoc &IDLoc,
                                         SmallVectorImpl<SMLoc> &Loc) {
const MCRegisterInfo *RI = getContext().getRegisterInfo();
const MCInstrDesc &MCID = MII.get(Inst.getOpcode());

// A prefix only applies to the instruction following it.  Here we extract
// prefix information for the next instruction before validating the current
// one so that in the case of failure we don't erronously continue using the
// current prefix.
PrefixInfo Prefix = NextPrefix;
NextPrefix = PrefixInfo::CreateFromInst(Inst, MCID.TSFlags);

// Before validating the instruction in isolation we run through the rules
// applicable when it follows a prefix instruction.
// NOTE: brk & hlt can be prefixed but require no additional validation.
if (Prefix.isActive() &&
    (Inst.getOpcode() != AArch64::BRK) &&
    (Inst.getOpcode() != AArch64::HLT)) {

  // Prefixed intructions must have a destructive operand.
  if ((MCID.TSFlags & AArch64::DestructiveInstTypeMask) ==
      AArch64::NotDestructive)
    return Error(IDLoc, "instruction is unpredictable when following a"
                 " movprfx, suggest replacing movprfx with mov");

  // Destination operands must match.
  if (Inst.getOperand(0).getReg() != Prefix.getDstReg())
    return Error(Loc[0], "instruction is unpredictable when following a"
                 " movprfx writing to a different destination");

  // Destination operand must not be used in any other location.
  for (unsigned i = 1; i < Inst.getNumOperands(); ++i) {
    if (Inst.getOperand(i).isReg() &&
        (MCID.getOperandConstraint(i, MCOI::TIED_TO) == -1) &&
        isMatchingOrAlias(Prefix.getDstReg(), Inst.getOperand(i).getReg()))
      return Error(Loc[0], "instruction is unpredictable when following a"
                   " movprfx and destination also used as non-destructive"
                   " source");
  }

  auto PPRRegClass = AArch64MCRegisterClasses[AArch64::PPRRegClassID];
  if (Prefix.isPredicated()) {
    int PgIdx = -1;

    // Find the instructions general predicate.
    for (unsigned i = 1; i < Inst.getNumOperands(); ++i)
      if (Inst.getOperand(i).isReg() &&
          PPRRegClass.contains(Inst.getOperand(i).getReg())) {
        PgIdx = i;
        break;
      }

    // Instruction must be predicated if the movprfx is predicated.
    if (PgIdx == -1 ||
        (MCID.TSFlags & AArch64::ElementSizeMask) == AArch64::ElementSizeNone)
      return Error(IDLoc, "instruction is unpredictable when following a"
                   " predicated movprfx, suggest using unpredicated movprfx");

    // Instruction must use same general predicate as the movprfx.
    if (Inst.getOperand(PgIdx).getReg() != Prefix.getPgReg())
      return Error(IDLoc, "instruction is unpredictable when following a"
                   " predicated movprfx using a different general predicate");

    // Instruction element type must match the movprfx.
    if ((MCID.TSFlags & AArch64::ElementSizeMask) != Prefix.getElementSize())
      return Error(IDLoc, "instruction is unpredictable when following a"
                   " predicated movprfx with a different element size");
  }
}

// Check for indexed addressing modes w/ the base register being the
// same as a destination/source register or pair load where
// the Rt == Rt2. All of those are undefined behaviour.
switch (Inst.getOpcode()) {
case AArch64::LDPSWpre:
case AArch64::LDPWpost:
case AArch64::LDPWpre:
case AArch64::LDPXpost:
case AArch64::LDPXpre: {
  unsigned Rt = Inst.getOperand(1).getReg();
  unsigned Rt2 = Inst.getOperand(2).getReg();
  unsigned Rn = Inst.getOperand(3).getReg();
  if (RI->isSubRegisterEq(Rn, Rt))
    return Error(Loc[0], "unpredictable LDP instruction, writeback base "
                         "is also a destination");
  if (RI->isSubRegisterEq(Rn, Rt2))
    return Error(Loc[1], "unpredictable LDP instruction, writeback base "
                         "is also a destination");
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
}
case AArch64::LDPDi:
case AArch64::LDPQi:
case AArch64::LDPSi:
case AArch64::LDPSWi:
case AArch64::LDPWi:
case AArch64::LDPXi: {
  unsigned Rt = Inst.getOperand(0).getReg();
  unsigned Rt2 = Inst.getOperand(1).getReg();
  if (Rt == Rt2)
    return Error(Loc[1], "unpredictable LDP instruction, Rt2==Rt");
  break;
}
case AArch64::LDPDpost:
case AArch64::LDPDpre:
case AArch64::LDPQpost:
case AArch64::LDPQpre:
case AArch64::LDPSpost:
case AArch64::LDPSpre:
case AArch64::LDPSWpost: {
  unsigned Rt = Inst.getOperand(1).getReg();
  unsigned Rt2 = Inst.getOperand(2).getReg();
  if (Rt == Rt2)
    return Error(Loc[1], "unpredictable LDP instruction, Rt2==Rt");
  break;
}
case AArch64::STPDpost:
case AArch64::STPDpre:
case AArch64::STPQpost:
case AArch64::STPQpre:
case AArch64::STPSpost:
case AArch64::STPSpre:
case AArch64::STPWpost:
case AArch64::STPWpre:
case AArch64::STPXpost:
case AArch64::STPXpre: {
  unsigned Rt = Inst.getOperand(1).getReg();
  unsigned Rt2 = Inst.getOperand(2).getReg();
  unsigned Rn = Inst.getOperand(3).getReg();
  if (RI->isSubRegisterEq(Rn, Rt))
    return Error(Loc[0], "unpredictable STP instruction, writeback base "
                         "is also a source");
  if (RI->isSubRegisterEq(Rn, Rt2))
    return Error(Loc[1], "unpredictable STP instruction, writeback base "
                         "is also a source");
  break;
}
case AArch64::LDRBBpre:
case AArch64::LDRBpre:
case AArch64::LDRHHpre:
case AArch64::LDRHpre:
case AArch64::LDRSBWpre:
case AArch64::LDRSBXpre:
case AArch64::LDRSHWpre:
case AArch64::LDRSHXpre:
case AArch64::LDRSWpre:
case AArch64::LDRWpre:
case AArch64::LDRXpre:
case AArch64::LDRBBpost:
case AArch64::LDRBpost:
case AArch64::LDRHHpost:
case AArch64::LDRHpost:
case AArch64::LDRSBWpost:
case AArch64::LDRSBXpost:
case AArch64::LDRSHWpost:
case AArch64::LDRSHXpost:
case AArch64::LDRSWpost:
case AArch64::LDRWpost:
case AArch64::LDRXpost: {
  unsigned Rt = Inst.getOperand(1).getReg();
  unsigned Rn = Inst.getOperand(2).getReg();
  if (RI->isSubRegisterEq(Rn, Rt))
    return Error(Loc[0], "unpredictable LDR instruction, writeback base "
                         "is also a source");
  break;
}
case AArch64::STRBBpost:
case AArch64::STRBpost:
case AArch64::STRHHpost:
case AArch64::STRHpost:
case AArch64::STRWpost:
case AArch64::STRXpost:
case AArch64::STRBBpre:
case AArch64::STRBpre:
case AArch64::STRHHpre:
case AArch64::STRHpre:
case AArch64::STRWpre:
case AArch64::STRXpre: {
  unsigned Rt = Inst.getOperand(1).getReg();
  unsigned Rn = Inst.getOperand(2).getReg();
  if (RI->isSubRegisterEq(Rn, Rt))
    return Error(Loc[0], "unpredictable STR instruction, writeback base "
                         "is also a source");
  break;
}
case AArch64::STXRB:
case AArch64::STXRH:
case AArch64::STXRW:
case AArch64::STXRX:
case AArch64::STLXRB:
case AArch64::STLXRH:
case AArch64::STLXRW:
case AArch64::STLXRX: {
  unsigned Rs = Inst.getOperand(0).getReg();
  unsigned Rt = Inst.getOperand(1).getReg();
  unsigned Rn = Inst.getOperand(2).getReg();
  if (RI->isSubRegisterEq(Rt, Rs) ||
      (RI->isSubRegisterEq(Rn, Rs) && Rn != AArch64::SP))
    return Error(Loc[0],
                 "unpredictable STXR instruction, status is also a source");
  break;
}
case AArch64::STXPW:
case AArch64::STXPX:
case AArch64::STLXPW:
case AArch64::STLXPX: {
  unsigned Rs = Inst.getOperand(0).getReg();
  unsigned Rt1 = Inst.getOperand(1).getReg();
  unsigned Rt2 = Inst.getOperand(2).getReg();
  unsigned Rn = Inst.getOperand(3).getReg();
  if (RI->isSubRegisterEq(Rt1, Rs) || RI->isSubRegisterEq(Rt2, Rs) ||
      (RI->isSubRegisterEq(Rn, Rs) && Rn != AArch64::SP))
    return Error(Loc[0],
                 "unpredictable STXP instruction, status is also a source");
  break;
}
case AArch64::LDRABwriteback:
case AArch64::LDRAAwriteback: {
  unsigned Xt = Inst.getOperand(0).getReg();
  unsigned Xn = Inst.getOperand(1).getReg();
  if (Xt == Xn)
    return Error(Loc[0],
        "unpredictable LDRA instruction, writeback base"
        " is also a destination");
  break;
}
}

// Check v8.8-A memops instructions.
switch (Inst.getOpcode()) {
case AArch64::CPYFP:
case AArch64::CPYFPWN:
case AArch64::CPYFPRN:
case AArch64::CPYFPN:
case AArch64::CPYFPWT:
case AArch64::CPYFPWTWN:
case AArch64::CPYFPWTRN:
case AArch64::CPYFPWTN:
case AArch64::CPYFPRT:
case AArch64::CPYFPRTWN:
case AArch64::CPYFPRTRN:
case AArch64::CPYFPRTN:
case AArch64::CPYFPT:
case AArch64::CPYFPTWN:
case AArch64::CPYFPTRN:
case AArch64::CPYFPTN:
case AArch64::CPYFM:
case AArch64::CPYFMWN:
case AArch64::CPYFMRN:
case AArch64::CPYFMN:
case AArch64::CPYFMWT:
case AArch64::CPYFMWTWN:
case AArch64::CPYFMWTRN:
case AArch64::CPYFMWTN:
case AArch64::CPYFMRT:
case AArch64::CPYFMRTWN:
case AArch64::CPYFMRTRN:
case AArch64::CPYFMRTN:
case AArch64::CPYFMT:
case AArch64::CPYFMTWN:
case AArch64::CPYFMTRN:
case AArch64::CPYFMTN:
case AArch64::CPYFE:
case AArch64::CPYFEWN:
case AArch64::CPYFERN:
case AArch64::CPYFEN:
case AArch64::CPYFEWT:
case AArch64::CPYFEWTWN:
case AArch64::CPYFEWTRN:
case AArch64::CPYFEWTN:
case AArch64::CPYFERT:
case AArch64::CPYFERTWN:
case AArch64::CPYFERTRN:
case AArch64::CPYFERTN:
case AArch64::CPYFET:
case AArch64::CPYFETWN:
case AArch64::CPYFETRN:
case AArch64::CPYFETN:
case AArch64::CPYP:
case AArch64::CPYPWN:
case AArch64::CPYPRN:
case AArch64::CPYPN:
case AArch64::CPYPWT:
case AArch64::CPYPWTWN:
case AArch64::CPYPWTRN:
case AArch64::CPYPWTN:
case AArch64::CPYPRT:
case AArch64::CPYPRTWN:
case AArch64::CPYPRTRN:
case AArch64::CPYPRTN:
case AArch64::CPYPT:
case AArch64::CPYPTWN:
case AArch64::CPYPTRN:
case AArch64::CPYPTN:
case AArch64::CPYM:
case AArch64::CPYMWN:
case AArch64::CPYMRN:
case AArch64::CPYMN:
case AArch64::CPYMWT:
case AArch64::CPYMWTWN:
case AArch64::CPYMWTRN:
case AArch64::CPYMWTN:
case AArch64::CPYMRT:
case AArch64::CPYMRTWN:
case AArch64::CPYMRTRN:
case AArch64::CPYMRTN:
case AArch64::CPYMT:
case AArch64::CPYMTWN:
case AArch64::CPYMTRN:
case AArch64::CPYMTN:
case AArch64::CPYE:
case AArch64::CPYEWN:
case AArch64::CPYERN:
case AArch64::CPYEN:
case AArch64::CPYEWT:
case AArch64::CPYEWTWN:
case AArch64::CPYEWTRN:
case AArch64::CPYEWTN:
case AArch64::CPYERT:
case AArch64::CPYERTWN:
case AArch64::CPYERTRN:
case AArch64::CPYERTN:
case AArch64::CPYET:
case AArch64::CPYETWN:
case AArch64::CPYETRN:
case AArch64::CPYETN: {
  unsigned Xd_wb = Inst.getOperand(0).getReg();
  unsigned Xs_wb = Inst.getOperand(1).getReg();
  unsigned Xn_wb = Inst.getOperand(2).getReg();
  unsigned Xd = Inst.getOperand(3).getReg();
  unsigned Xs = Inst.getOperand(4).getReg();
  unsigned Xn = Inst.getOperand(5).getReg();
  if (Xd_wb != Xd)
    return Error(Loc[0],
                 "invalid CPY instruction, Xd_wb and Xd do not match");
  if (Xs_wb != Xs)
    return Error(Loc[0],
                 "invalid CPY instruction, Xs_wb and Xs do not match");
  if (Xn_wb != Xn)
    return Error(Loc[0],
                 "invalid CPY instruction, Xn_wb and Xn do not match");
  if (Xd == Xs)
    return Error(Loc[0], "invalid CPY instruction, destination and source"
                         " registers are the same");
  if (Xd == Xn)
    return Error(Loc[0], "invalid CPY instruction, destination and size"
                         " registers are the same");
  if (Xs == Xn)
    return Error(Loc[0], "invalid CPY instruction, source and size"
                         " registers are the same");
  break;
}
case AArch64::SETP:
case AArch64::SETPT:
case AArch64::SETPN:
case AArch64::SETPTN:
case AArch64::SETM:
case AArch64::SETMT:
case AArch64::SETMN:
case AArch64::SETMTN:
case AArch64::SETE:
case AArch64::SETET:
case AArch64::SETEN:
case AArch64::SETETN:
case AArch64::SETGP:
case AArch64::SETGPT:
case AArch64::SETGPN:
case AArch64::SETGPTN:
case AArch64::SETGM:
case AArch64::SETGMT:
case AArch64::SETGMN:
case AArch64::SETGMTN:
case AArch64::MOPSSETGE:
case AArch64::MOPSSETGET:
case AArch64::MOPSSETGEN:
case AArch64::MOPSSETGETN: {
  unsigned Xd_wb = Inst.getOperand(0).getReg();
  unsigned Xn_wb = Inst.getOperand(1).getReg();
  unsigned Xd = Inst.getOperand(2).getReg();
  unsigned Xn = Inst.getOperand(3).getReg();
  unsigned Xm = Inst.getOperand(4).getReg();
  if (Xd_wb != Xd)
    return Error(Loc[0],
                 "invalid SET instruction, Xd_wb and Xd do not match");
  if (Xn_wb != Xn)
    return Error(Loc[0],
                 "invalid SET instruction, Xn_wb and Xn do not match");
  if (Xd == Xn)
    return Error(Loc[0], "invalid SET instruction, destination and size"
                         " registers are the same");
  if (Xd == Xm)
    return Error(Loc[0], "invalid SET instruction, destination and source"
                         " registers are the same");
  if (Xn == Xm)
    return Error(Loc[0], "invalid SET instruction, source and size"
                         " registers are the same");
  break;
}
}

// Now check immediate ranges. Separate from the above as there is overlap
// in the instructions being checked and this keeps the nested conditionals
// to a minimum.
switch (Inst.getOpcode()) {
case AArch64::ADDSWri:
case AArch64::ADDSXri:
case AArch64::ADDWri:
case AArch64::ADDXri:
case AArch64::SUBSWri:
case AArch64::SUBSXri:
case AArch64::SUBWri:
case AArch64::SUBXri: {
  // Annoyingly we can't do this in the isAddSubImm predicate, so there is
  // some slight duplication here.
  if (Inst.getOperand(2).isExpr()) {
    const MCExpr *Expr = Inst.getOperand(2).getExpr();
    AArch64MCExpr::VariantKind ELFRefKind;
    MCSymbolRefExpr::VariantKind DarwinRefKind;
    int64_t Addend;
    if (classifySymbolRef(Expr, ELFRefKind, DarwinRefKind, Addend)) {

      // Only allow these with ADDXri.
      if ((DarwinRefKind == MCSymbolRefExpr::VK_PAGEOFF ||
           DarwinRefKind == MCSymbolRefExpr::VK_TLVPPAGEOFF) &&
          Inst.getOpcode() == AArch64::ADDXri)
        return false;

      // Only allow these with ADDXri/ADDWri
      if ((ELFRefKind == AArch64MCExpr::VK_LO12 ||
           ELFRefKind == AArch64MCExpr::VK_DTPREL_HI12 ||
           ELFRefKind == AArch64MCExpr::VK_DTPREL_LO12 ||
           ELFRefKind == AArch64MCExpr::VK_DTPREL_LO12_NC ||
           ELFRefKind == AArch64MCExpr::VK_TPREL_HI12 ||
           ELFRefKind == AArch64MCExpr::VK_TPREL_LO12 ||
           ELFRefKind == AArch64MCExpr::VK_TPREL_LO12_NC ||
           ELFRefKind == AArch64MCExpr::VK_TLSDESC_LO12 ||
           ELFRefKind == AArch64MCExpr::VK_SECREL_LO12 ||
           ELFRefKind == AArch64MCExpr::VK_SECREL_HI12) &&
          (Inst.getOpcode() == AArch64::ADDXri ||
           Inst.getOpcode() == AArch64::ADDWri))
        return false;

      // Don't allow symbol refs in the immediate field otherwise
      // Note: Loc.back() may be Loc[1] or Loc[2] depending on the number of
      // operands of the original instruction (i.e. 'add w0, w1, borked' vs
      // 'cmp w0, 'borked')
      return Error(Loc.back(), "invalid immediate expression");
    }
    // We don't validate more complex expressions here
  }
  return false;
}
default:
  return false;
}
5113}

5115static std::string AArch64MnemonicSpellCheck(StringRef S,
                                           const FeatureBitset &FBS,
                                           unsigned VariantID = 0);

5119bool AArch64AsmParser::showMatchError(SMLoc Loc, unsigned ErrCode,
                                    uint64_t ErrorInfo,
                                    OperandVector &Operands) {
switch (ErrCode) {
case Match_InvalidTiedOperand: {
  RegConstraintEqualityTy EqTy =
      static_cast<const AArch64Operand &>(*Operands[ErrorInfo])
          .getRegEqualityTy();
  switch (EqTy) {
  case RegConstraintEqualityTy::EqualsSubReg:
    return Error(Loc, "operand must be 64-bit form of destination register");
  case RegConstraintEqualityTy::EqualsSuperReg:
    return Error(Loc, "operand must be 32-bit form of destination register");
  case RegConstraintEqualityTy::EqualsReg:
    return Error(Loc, "operand must match destination register");
  }
  llvm_unreachable("Unknown RegConstraintEqualityTy")::llvm::llvm_unreachable_internal("Unknown RegConstraintEqualityTy"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 5135
);
}
case Match_MissingFeature:
  return Error(Loc,
               "instruction requires a CPU feature not currently enabled");
case Match_InvalidOperand:
  return Error(Loc, "invalid operand for instruction");
case Match_InvalidSuffix:
  return Error(Loc, "invalid type suffix for instruction");
case Match_InvalidCondCode:
  return Error(Loc, "expected AArch64 condition code");
case Match_AddSubRegExtendSmall:
  return Error(Loc,
    "expected '[su]xt[bhw]' with optional integer in range [0, 4]");
case Match_AddSubRegExtendLarge:
  return Error(Loc,
    "expected 'sxtx' 'uxtx' or 'lsl' with optional integer in range [0, 4]");
case Match_AddSubSecondSource:
  return Error(Loc,
    "expected compatible register, symbol or integer in range [0, 4095]");
case Match_LogicalSecondSource:
  return Error(Loc, "expected compatible register or logical immediate");
case Match_InvalidMovImm32Shift:
  return Error(Loc, "expected 'lsl' with optional integer 0 or 16");
case Match_InvalidMovImm64Shift:
  return Error(Loc, "expected 'lsl' with optional integer 0, 16, 32 or 48");
case Match_AddSubRegShift32:
  return Error(Loc,
     "expected 'lsl', 'lsr' or 'asr' with optional integer in range [0, 31]");
case Match_AddSubRegShift64:
  return Error(Loc,
     "expected 'lsl', 'lsr' or 'asr' with optional integer in range [0, 63]");
case Match_InvalidFPImm:
  return Error(Loc,
               "expected compatible register or floating-point constant");
case Match_InvalidMemoryIndexedSImm6:
  return Error(Loc, "index must be an integer in range [-32, 31].");
case Match_InvalidMemoryIndexedSImm5:
  return Error(Loc, "index must be an integer in range [-16, 15].");
case Match_InvalidMemoryIndexed1SImm4:
  return Error(Loc, "index must be an integer in range [-8, 7].");
case Match_InvalidMemoryIndexed2SImm4:
  return Error(Loc, "index must be a multiple of 2 in range [-16, 14].");
case Match_InvalidMemoryIndexed3SImm4:
  return Error(Loc, "index must be a multiple of 3 in range [-24, 21].");
case Match_InvalidMemoryIndexed4SImm4:
  return Error(Loc, "index must be a multiple of 4 in range [-32, 28].");
case Match_InvalidMemoryIndexed16SImm4:
  return Error(Loc, "index must be a multiple of 16 in range [-128, 112].");
case Match_InvalidMemoryIndexed32SImm4:
  return Error(Loc, "index must be a multiple of 32 in range [-256, 224].");
case Match_InvalidMemoryIndexed1SImm6:
  return Error(Loc, "index must be an integer in range [-32, 31].");
case Match_InvalidMemoryIndexedSImm8:
  return Error(Loc, "index must be an integer in range [-128, 127].");
case Match_InvalidMemoryIndexedSImm9:
  return Error(Loc, "index must be an integer in range [-256, 255].");
case Match_InvalidMemoryIndexed16SImm9:
  return Error(Loc, "index must be a multiple of 16 in range [-4096, 4080].");
case Match_InvalidMemoryIndexed8SImm10:
  return Error(Loc, "index must be a multiple of 8 in range [-4096, 4088].");
case Match_InvalidMemoryIndexed4SImm7:
  return Error(Loc, "index must be a multiple of 4 in range [-256, 252].");
case Match_InvalidMemoryIndexed8SImm7:
  return Error(Loc, "index must be a multiple of 8 in range [-512, 504].");
case Match_InvalidMemoryIndexed16SImm7:
  return Error(Loc, "index must be a multiple of 16 in range [-1024, 1008].");
case Match_InvalidMemoryIndexed8UImm5:
  return Error(Loc, "index must be a multiple of 8 in range [0, 248].");
case Match_InvalidMemoryIndexed4UImm5:
  return Error(Loc, "index must be a multiple of 4 in range [0, 124].");
case Match_InvalidMemoryIndexed2UImm5:
  return Error(Loc, "index must be a multiple of 2 in range [0, 62].");
case Match_InvalidMemoryIndexed8UImm6:
  return Error(Loc, "index must be a multiple of 8 in range [0, 504].");
case Match_InvalidMemoryIndexed16UImm6:
  return Error(Loc, "index must be a multiple of 16 in range [0, 1008].");
case Match_InvalidMemoryIndexed4UImm6:
  return Error(Loc, "index must be a multiple of 4 in range [0, 252].");
case Match_InvalidMemoryIndexed2UImm6:
  return Error(Loc, "index must be a multiple of 2 in range [0, 126].");
case Match_InvalidMemoryIndexed1UImm6:
  return Error(Loc, "index must be in range [0, 63].");
case Match_InvalidMemoryWExtend8:
  return Error(Loc,
               "expected 'uxtw' or 'sxtw' with optional shift of #0");
case Match_InvalidMemoryWExtend16:
  return Error(Loc,
               "expected 'uxtw' or 'sxtw' with optional shift of #0 or #1");
case Match_InvalidMemoryWExtend32:
  return Error(Loc,
               "expected 'uxtw' or 'sxtw' with optional shift of #0 or #2");
case Match_InvalidMemoryWExtend64:
  return Error(Loc,
               "expected 'uxtw' or 'sxtw' with optional shift of #0 or #3");
case Match_InvalidMemoryWExtend128:
  return Error(Loc,
               "expected 'uxtw' or 'sxtw' with optional shift of #0 or #4");
case Match_InvalidMemoryXExtend8:
  return Error(Loc,
               "expected 'lsl' or 'sxtx' with optional shift of #0");
case Match_InvalidMemoryXExtend16:
  return Error(Loc,
               "expected 'lsl' or 'sxtx' with optional shift of #0 or #1");
case Match_InvalidMemoryXExtend32:
  return Error(Loc,
               "expected 'lsl' or 'sxtx' with optional shift of #0 or #2");
case Match_InvalidMemoryXExtend64:
  return Error(Loc,
               "expected 'lsl' or 'sxtx' with optional shift of #0 or #3");
case Match_InvalidMemoryXExtend128:
  return Error(Loc,
               "expected 'lsl' or 'sxtx' with optional shift of #0 or #4");
case Match_InvalidMemoryIndexed1:
  return Error(Loc, "index must be an integer in range [0, 4095].");
case Match_InvalidMemoryIndexed2:
  return Error(Loc, "index must be a multiple of 2 in range [0, 8190].");
case Match_InvalidMemoryIndexed4:
  return Error(Loc, "index must be a multiple of 4 in range [0, 16380].");
case Match_InvalidMemoryIndexed8:
  return Error(Loc, "index must be a multiple of 8 in range [0, 32760].");
case Match_InvalidMemoryIndexed16:
  return Error(Loc, "index must be a multiple of 16 in range [0, 65520].");
case Match_InvalidImm0_0:
  return Error(Loc, "immediate must be 0.");
case Match_InvalidImm0_1:
  return Error(Loc, "immediate must be an integer in range [0, 1].");
case Match_InvalidImm0_3:
  return Error(Loc, "immediate must be an integer in range [0, 3].");
case Match_InvalidImm0_7:
  return Error(Loc, "immediate must be an integer in range [0, 7].");
case Match_InvalidImm0_15:
  return Error(Loc, "immediate must be an integer in range [0, 15].");
case Match_InvalidImm0_31:
  return Error(Loc, "immediate must be an integer in range [0, 31].");
case Match_InvalidImm0_63:
  return Error(Loc, "immediate must be an integer in range [0, 63].");
case Match_InvalidImm0_127:
  return Error(Loc, "immediate must be an integer in range [0, 127].");
case Match_InvalidImm0_255:
  return Error(Loc, "immediate must be an integer in range [0, 255].");
case Match_InvalidImm0_65535:
  return Error(Loc, "immediate must be an integer in range [0, 65535].");
case Match_InvalidImm1_8:
  return Error(Loc, "immediate must be an integer in range [1, 8].");
case Match_InvalidImm1_16:
  return Error(Loc, "immediate must be an integer in range [1, 16].");
case Match_InvalidImm1_32:
  return Error(Loc, "immediate must be an integer in range [1, 32].");
case Match_InvalidImm1_64:
  return Error(Loc, "immediate must be an integer in range [1, 64].");
case Match_InvalidSVEAddSubImm8:
  return Error(Loc, "immediate must be an integer in range [0, 255]"
                    " with a shift amount of 0");
case Match_InvalidSVEAddSubImm16:
case Match_InvalidSVEAddSubImm32:
case Match_InvalidSVEAddSubImm64:
  return Error(Loc, "immediate must be an integer in range [0, 255] or a "
                    "multiple of 256 in range [256, 65280]");
case Match_InvalidSVECpyImm8:
  return Error(Loc, "immediate must be an integer in range [-128, 255]"
                    " with a shift amount of 0");
case Match_InvalidSVECpyImm16:
  return Error(Loc, "immediate must be an integer in range [-128, 127] or a "
                    "multiple of 256 in range [-32768, 65280]");
case Match_InvalidSVECpyImm32:
case Match_InvalidSVECpyImm64:
  return Error(Loc, "immediate must be an integer in range [-128, 127] or a "
                    "multiple of 256 in range [-32768, 32512]");
case Match_InvalidIndexRange0_0:
  return Error(Loc, "expected lane specifier '[0]'");
case Match_InvalidIndexRange1_1:
  return Error(Loc, "expected lane specifier '[1]'");
case Match_InvalidIndexRange0_15:
  return Error(Loc, "vector lane must be an integer in range [0, 15].");
case Match_InvalidIndexRange0_7:
  return Error(Loc, "vector lane must be an integer in range [0, 7].");
case Match_InvalidIndexRange0_3:
  return Error(Loc, "vector lane must be an integer in range [0, 3].");
case Match_InvalidIndexRange0_1:
  return Error(Loc, "vector lane must be an integer in range [0, 1].");
case Match_InvalidSVEIndexRange0_63:
  return Error(Loc, "vector lane must be an integer in range [0, 63].");
case Match_InvalidSVEIndexRange0_31:
  return Error(Loc, "vector lane must be an integer in range [0, 31].");
case Match_InvalidSVEIndexRange0_15:
  return Error(Loc, "vector lane must be an integer in range [0, 15].");
case Match_InvalidSVEIndexRange0_7:
  return Error(Loc, "vector lane must be an integer in range [0, 7].");
case Match_InvalidSVEIndexRange0_3:
  return Error(Loc, "vector lane must be an integer in range [0, 3].");
case Match_InvalidLabel:
  return Error(Loc, "expected label or encodable integer pc offset");
case Match_MRS:
  return Error(Loc, "expected readable system register");
case Match_MSR:
case Match_InvalidSVCR:
  return Error(Loc, "expected writable system register or pstate");
case Match_InvalidComplexRotationEven:
  return Error(Loc, "complex rotation must be 0, 90, 180 or 270.");
case Match_InvalidComplexRotationOdd:
  return Error(Loc, "complex rotation must be 90 or 270.");
case Match_MnemonicFail: {
  std::string Suggestion = AArch64MnemonicSpellCheck(
      ((AArch64Operand &)*Operands[0]).getToken(),
      ComputeAvailableFeatures(STI->getFeatureBits()));
  return Error(Loc, "unrecognized instruction mnemonic" + Suggestion);
}
case Match_InvalidGPR64shifted8:
  return Error(Loc, "register must be x0..x30 or xzr, without shift");
case Match_InvalidGPR64shifted16:
  return Error(Loc, "register must be x0..x30 or xzr, with required shift 'lsl #1'");
case Match_InvalidGPR64shifted32:
  return Error(Loc, "register must be x0..x30 or xzr, with required shift 'lsl #2'");
case Match_InvalidGPR64shifted64:
  return Error(Loc, "register must be x0..x30 or xzr, with required shift 'lsl #3'");
case Match_InvalidGPR64shifted128:
  return Error(
      Loc, "register must be x0..x30 or xzr, with required shift 'lsl #4'");
case Match_InvalidGPR64NoXZRshifted8:
  return Error(Loc, "register must be x0..x30 without shift");
case Match_InvalidGPR64NoXZRshifted16:
  return Error(Loc, "register must be x0..x30 with required shift 'lsl #1'");
case Match_InvalidGPR64NoXZRshifted32:
  return Error(Loc, "register must be x0..x30 with required shift 'lsl #2'");
case Match_InvalidGPR64NoXZRshifted64:
  return Error(Loc, "register must be x0..x30 with required shift 'lsl #3'");
case Match_InvalidGPR64NoXZRshifted128:
  return Error(Loc, "register must be x0..x30 with required shift 'lsl #4'");
case Match_InvalidZPR32UXTW8:
case Match_InvalidZPR32SXTW8:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s, (uxtw|sxtw)'");
case Match_InvalidZPR32UXTW16:
case Match_InvalidZPR32SXTW16:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s, (uxtw|sxtw) #1'");
case Match_InvalidZPR32UXTW32:
case Match_InvalidZPR32SXTW32:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s, (uxtw|sxtw) #2'");
case Match_InvalidZPR32UXTW64:
case Match_InvalidZPR32SXTW64:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s, (uxtw|sxtw) #3'");
case Match_InvalidZPR64UXTW8:
case Match_InvalidZPR64SXTW8:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d, (uxtw|sxtw)'");
case Match_InvalidZPR64UXTW16:
case Match_InvalidZPR64SXTW16:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d, (lsl|uxtw|sxtw) #1'");
case Match_InvalidZPR64UXTW32:
case Match_InvalidZPR64SXTW32:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d, (lsl|uxtw|sxtw) #2'");
case Match_InvalidZPR64UXTW64:
case Match_InvalidZPR64SXTW64:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d, (lsl|uxtw|sxtw) #3'");
case Match_InvalidZPR32LSL8:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s'");
case Match_InvalidZPR32LSL16:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s, lsl #1'");
case Match_InvalidZPR32LSL32:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s, lsl #2'");
case Match_InvalidZPR32LSL64:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].s, lsl #3'");
case Match_InvalidZPR64LSL8:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d'");
case Match_InvalidZPR64LSL16:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d, lsl #1'");
case Match_InvalidZPR64LSL32:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d, lsl #2'");
case Match_InvalidZPR64LSL64:
  return Error(Loc, "invalid shift/extend specified, expected 'z[0..31].d, lsl #3'");
case Match_InvalidZPR0:
  return Error(Loc, "expected register without element width suffix");
case Match_InvalidZPR8:
case Match_InvalidZPR16:
case Match_InvalidZPR32:
case Match_InvalidZPR64:
case Match_InvalidZPR128:
  return Error(Loc, "invalid element width");
case Match_InvalidZPR_3b8:
  return Error(Loc, "Invalid restricted vector register, expected z0.b..z7.b");
case Match_InvalidZPR_3b16:
  return Error(Loc, "Invalid restricted vector register, expected z0.h..z7.h");
case Match_InvalidZPR_3b32:
  return Error(Loc, "Invalid restricted vector register, expected z0.s..z7.s");
case Match_InvalidZPR_4b16:
  return Error(Loc, "Invalid restricted vector register, expected z0.h..z15.h");
case Match_InvalidZPR_4b32:
  return Error(Loc, "Invalid restricted vector register, expected z0.s..z15.s");
case Match_InvalidZPR_4b64:
  return Error(Loc, "Invalid restricted vector register, expected z0.d..z15.d");
case Match_InvalidSVEPattern:
  return Error(Loc, "invalid predicate pattern");
case Match_InvalidSVEPredicateAnyReg:
case Match_InvalidSVEPredicateBReg:
case Match_InvalidSVEPredicateHReg:
case Match_InvalidSVEPredicateSReg:
case Match_InvalidSVEPredicateDReg:
  return Error(Loc, "invalid predicate register.");
case Match_InvalidSVEPredicate3bAnyReg:
  return Error(Loc, "invalid restricted predicate register, expected p0..p7 (without element suffix)");
case Match_InvalidSVEExactFPImmOperandHalfOne:
  return Error(Loc, "Invalid floating point constant, expected 0.5 or 1.0.");
case Match_InvalidSVEExactFPImmOperandHalfTwo:
  return Error(Loc, "Invalid floating point constant, expected 0.5 or 2.0.");
case Match_InvalidSVEExactFPImmOperandZeroOne:
  return Error(Loc, "Invalid floating point constant, expected 0.0 or 1.0.");
case Match_InvalidMatrixTileVectorH8:
case Match_InvalidMatrixTileVectorV8:
  return Error(Loc, "invalid matrix operand, expected za0h.b or za0v.b");
case Match_InvalidMatrixTileVectorH16:
case Match_InvalidMatrixTileVectorV16:
  return Error(Loc,
               "invalid matrix operand, expected za[0-1]h.h or za[0-1]v.h");
case Match_InvalidMatrixTileVectorH32:
case Match_InvalidMatrixTileVectorV32:
  return Error(Loc,
               "invalid matrix operand, expected za[0-3]h.s or za[0-3]v.s");
case Match_InvalidMatrixTileVectorH64:
case Match_InvalidMatrixTileVectorV64:
  return Error(Loc,
               "invalid matrix operand, expected za[0-7]h.d or za[0-7]v.d");
case Match_InvalidMatrixTileVectorH128:
case Match_InvalidMatrixTileVectorV128:
  return Error(Loc,
               "invalid matrix operand, expected za[0-15]h.q or za[0-15]v.q");
case Match_InvalidMatrixTile32:
  return Error(Loc, "invalid matrix operand, expected za[0-3].s");
case Match_InvalidMatrixTile64:
  return Error(Loc, "invalid matrix operand, expected za[0-7].d");
case Match_InvalidMatrix:
  return Error(Loc, "invalid matrix operand, expected za");
case Match_InvalidMatrixIndexGPR32_12_15:
  return Error(Loc, "operand must be a register in range [w12, w15]");
default:
  llvm_unreachable("unexpected error code!")::llvm::llvm_unreachable_internal("unexpected error code!", "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp"
, 5468);
}
5470}

5472static const char *getSubtargetFeatureName(uint64_t Val);

5474bool AArch64AsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                                             OperandVector &Operands,
                                             MCStreamer &Out,
                                             uint64_t &ErrorInfo,
                                             bool MatchingInlineAsm) {
assert(!Operands.empty() && "Unexpect empty operand list!")(static_cast <bool> (!Operands.empty() && "Unexpect empty operand list!"
) ? void (0) : __assert_fail ("!Operands.empty() && \"Unexpect empty operand list!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 5479
, __extension__ __PRETTY_FUNCTION__));
AArch64Operand &Op = static_cast<AArch64Operand &>(*Operands[0]);
assert(Op.isToken() && "Leading operand should always be a mnemonic!")(static_cast <bool> (Op.isToken() && "Leading operand should always be a mnemonic!"
) ? void (0) : __assert_fail ("Op.isToken() && \"Leading operand should always be a mnemonic!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 5481
, __extension__ __PRETTY_FUNCTION__));

StringRef Tok = Op.getToken();
unsigned NumOperands = Operands.size();

if (NumOperands == 4 && Tok == "lsl") {
  AArch64Operand &Op2 = static_cast<AArch64Operand &>(*Operands[2]);
  AArch64Operand &Op3 = static_cast<AArch64Operand &>(*Operands[3]);
  if (Op2.isScalarReg() && Op3.isImm()) {
    const MCConstantExpr *Op3CE = dyn_cast<MCConstantExpr>(Op3.getImm());
    if (Op3CE) {
      uint64_t Op3Val = Op3CE->getValue();
      uint64_t NewOp3Val = 0;
      uint64_t NewOp4Val = 0;
      if (AArch64MCRegisterClasses[AArch64::GPR32allRegClassID].contains(
              Op2.getReg())) {
        NewOp3Val = (32 - Op3Val) & 0x1f;
        NewOp4Val = 31 - Op3Val;
      } else {
        NewOp3Val = (64 - Op3Val) & 0x3f;
        NewOp4Val = 63 - Op3Val;
      }

      const MCExpr *NewOp3 = MCConstantExpr::create(NewOp3Val, getContext());
      const MCExpr *NewOp4 = MCConstantExpr::create(NewOp4Val, getContext());

      Operands[0] =
          AArch64Operand::CreateToken("ubfm", Op.getStartLoc(), getContext());
      Operands.push_back(AArch64Operand::CreateImm(
          NewOp4, Op3.getStartLoc(), Op3.getEndLoc(), getContext()));
      Operands[3] = AArch64Operand::CreateImm(NewOp3, Op3.getStartLoc(),
                                              Op3.getEndLoc(), getContext());
    }
  }
} else if (NumOperands == 4 && Tok == "bfc") {
  // FIXME: Horrible hack to handle BFC->BFM alias.
  AArch64Operand &Op1 = static_cast<AArch64Operand &>(*Operands[1]);
  AArch64Operand LSBOp = static_cast<AArch64Operand &>(*Operands[2]);
  AArch64Operand WidthOp = static_cast<AArch64Operand &>(*Operands[3]);

  if (Op1.isScalarReg() && LSBOp.isImm() && WidthOp.isImm()) {
    const MCConstantExpr *LSBCE = dyn_cast<MCConstantExpr>(LSBOp.getImm());
    const MCConstantExpr *WidthCE = dyn_cast<MCConstantExpr>(WidthOp.getImm());

    if (LSBCE && WidthCE) {
      uint64_t LSB = LSBCE->getValue();
      uint64_t Width = WidthCE->getValue();

      uint64_t RegWidth = 0;
      if (AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
              Op1.getReg()))
        RegWidth = 64;
      else
        RegWidth = 32;

      if (LSB >= RegWidth)
        return Error(LSBOp.getStartLoc(),
                     "expected integer in range [0, 31]");
      if (Width < 1 || Width > RegWidth)
        return Error(WidthOp.getStartLoc(),
                     "expected integer in range [1, 32]");

      uint64_t ImmR = 0;
      if (RegWidth == 32)
        ImmR = (32 - LSB) & 0x1f;
      else
        ImmR = (64 - LSB) & 0x3f;

      uint64_t ImmS = Width - 1;

      if (ImmR != 0 && ImmS >= ImmR)
        return Error(WidthOp.getStartLoc(),
                     "requested insert overflows register");

      const MCExpr *ImmRExpr = MCConstantExpr::create(ImmR, getContext());
      const MCExpr *ImmSExpr = MCConstantExpr::create(ImmS, getContext());
      Operands[0] =
          AArch64Operand::CreateToken("bfm", Op.getStartLoc(), getContext());
      Operands[2] = AArch64Operand::CreateReg(
          RegWidth == 32 ? AArch64::WZR : AArch64::XZR, RegKind::Scalar,
          SMLoc(), SMLoc(), getContext());
      Operands[3] = AArch64Operand::CreateImm(
          ImmRExpr, LSBOp.getStartLoc(), LSBOp.getEndLoc(), getContext());
      Operands.emplace_back(
          AArch64Operand::CreateImm(ImmSExpr, WidthOp.getStartLoc(),
                                    WidthOp.getEndLoc(), getContext()));
    }
  }
} else if (NumOperands == 5) {
  // FIXME: Horrible hack to handle the BFI -> BFM, SBFIZ->SBFM, and
  // UBFIZ -> UBFM aliases.
  if (Tok == "bfi" || Tok == "sbfiz" || Tok == "ubfiz") {
    AArch64Operand &Op1 = static_cast<AArch64Operand &>(*Operands[1]);
    AArch64Operand &Op3 = static_cast<AArch64Operand &>(*Operands[3]);
    AArch64Operand &Op4 = static_cast<AArch64Operand &>(*Operands[4]);

    if (Op1.isScalarReg() && Op3.isImm() && Op4.isImm()) {
      const MCConstantExpr *Op3CE = dyn_cast<MCConstantExpr>(Op3.getImm());
      const MCConstantExpr *Op4CE = dyn_cast<MCConstantExpr>(Op4.getImm());

      if (Op3CE && Op4CE) {
        uint64_t Op3Val = Op3CE->getValue();
        uint64_t Op4Val = Op4CE->getValue();

        uint64_t RegWidth = 0;
        if (AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
                Op1.getReg()))
          RegWidth = 64;
        else
          RegWidth = 32;

        if (Op3Val >= RegWidth)
          return Error(Op3.getStartLoc(),
                       "expected integer in range [0, 31]");
        if (Op4Val < 1 || Op4Val > RegWidth)
          return Error(Op4.getStartLoc(),
                       "expected integer in range [1, 32]");

        uint64_t NewOp3Val = 0;
        if (RegWidth == 32)
          NewOp3Val = (32 - Op3Val) & 0x1f;
        else
          NewOp3Val = (64 - Op3Val) & 0x3f;

        uint64_t NewOp4Val = Op4Val - 1;

        if (NewOp3Val != 0 && NewOp4Val >= NewOp3Val)
          return Error(Op4.getStartLoc(),
                       "requested insert overflows register");

        const MCExpr *NewOp3 =
            MCConstantExpr::create(NewOp3Val, getContext());
        const MCExpr *NewOp4 =
            MCConstantExpr::create(NewOp4Val, getContext());
        Operands[3] = AArch64Operand::CreateImm(
            NewOp3, Op3.getStartLoc(), Op3.getEndLoc(), getContext());
        Operands[4] = AArch64Operand::CreateImm(
            NewOp4, Op4.getStartLoc(), Op4.getEndLoc(), getContext());
        if (Tok == "bfi")
          Operands[0] = AArch64Operand::CreateToken("bfm", Op.getStartLoc(),
                                                    getContext());
        else if (Tok == "sbfiz")
          Operands[0] = AArch64Operand::CreateToken("sbfm", Op.getStartLoc(),
                                                    getContext());
        else if (Tok == "ubfiz")
          Operands[0] = AArch64Operand::CreateToken("ubfm", Op.getStartLoc(),
                                                    getContext());
        else
          llvm_unreachable("No valid mnemonic for alias?")::llvm::llvm_unreachable_internal("No valid mnemonic for alias?"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 5629
);
      }
    }

    // FIXME: Horrible hack to handle the BFXIL->BFM, SBFX->SBFM, and
    // UBFX -> UBFM aliases.
  } else if (NumOperands == 5 &&
             (Tok == "bfxil" || Tok == "sbfx" || Tok == "ubfx")) {
    AArch64Operand &Op1 = static_cast<AArch64Operand &>(*Operands[1]);
    AArch64Operand &Op3 = static_cast<AArch64Operand &>(*Operands[3]);
    AArch64Operand &Op4 = static_cast<AArch64Operand &>(*Operands[4]);

    if (Op1.isScalarReg() && Op3.isImm() && Op4.isImm()) {
      const MCConstantExpr *Op3CE = dyn_cast<MCConstantExpr>(Op3.getImm());
      const MCConstantExpr *Op4CE = dyn_cast<MCConstantExpr>(Op4.getImm());

      if (Op3CE && Op4CE) {
        uint64_t Op3Val = Op3CE->getValue();
        uint64_t Op4Val = Op4CE->getValue();

        uint64_t RegWidth = 0;
        if (AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
                Op1.getReg()))
          RegWidth = 64;
        else
          RegWidth = 32;

        if (Op3Val >= RegWidth)
          return Error(Op3.getStartLoc(),
                       "expected integer in range [0, 31]");
        if (Op4Val < 1 || Op4Val > RegWidth)
          return Error(Op4.getStartLoc(),
                       "expected integer in range [1, 32]");

        uint64_t NewOp4Val = Op3Val + Op4Val - 1;

        if (NewOp4Val >= RegWidth || NewOp4Val < Op3Val)
          return Error(Op4.getStartLoc(),
                       "requested extract overflows register");

        const MCExpr *NewOp4 =
            MCConstantExpr::create(NewOp4Val, getContext());
        Operands[4] = AArch64Operand::CreateImm(
            NewOp4, Op4.getStartLoc(), Op4.getEndLoc(), getContext());
        if (Tok == "bfxil")
          Operands[0] = AArch64Operand::CreateToken("bfm", Op.getStartLoc(),
                                                    getContext());
        else if (Tok == "sbfx")
          Operands[0] = AArch64Operand::CreateToken("sbfm", Op.getStartLoc(),
                                                    getContext());
        else if (Tok == "ubfx")
          Operands[0] = AArch64Operand::CreateToken("ubfm", Op.getStartLoc(),
                                                    getContext());
        else
          llvm_unreachable("No valid mnemonic for alias?")::llvm::llvm_unreachable_internal("No valid mnemonic for alias?"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 5683
);
      }
    }
  }
}

// The Cyclone CPU and early successors didn't execute the zero-cycle zeroing
// instruction for FP registers correctly in some rare circumstances. Convert
// it to a safe instruction and warn (because silently changing someone's
// assembly is rude).
if (getSTI().getFeatureBits()[AArch64::FeatureZCZeroingFPWorkaround] &&
    NumOperands == 4 && Tok == "movi") {
  AArch64Operand &Op1 = static_cast<AArch64Operand &>(*Operands[1]);
  AArch64Operand &Op2 = static_cast<AArch64Operand &>(*Operands[2]);
  AArch64Operand &Op3 = static_cast<AArch64Operand &>(*Operands[3]);
  if ((Op1.isToken() && Op2.isNeonVectorReg() && Op3.isImm()) ||
      (Op1.isNeonVectorReg() && Op2.isToken() && Op3.isImm())) {
    StringRef Suffix = Op1.isToken() ? Op1.getToken() : Op2.getToken();
    if (Suffix.lower() == ".2d" &&
        cast<MCConstantExpr>(Op3.getImm())->getValue() == 0) {
      Warning(IDLoc, "instruction movi.2d with immediate #0 may not function"
              " correctly on this CPU, converting to equivalent movi.16b");
      // Switch the suffix to .16b.
      unsigned Idx = Op1.isToken() ? 1 : 2;
      Operands[Idx] =
          AArch64Operand::CreateToken(".16b", IDLoc, getContext());
    }
  }
}

// FIXME: Horrible hack for sxtw and uxtw with Wn src and Xd dst operands.
//        InstAlias can't quite handle this since the reg classes aren't
//        subclasses.
if (NumOperands == 3 && (Tok == "sxtw" || Tok == "uxtw")) {
  // The source register can be Wn here, but the matcher expects a
  // GPR64. Twiddle it here if necessary.
  AArch64Operand &Op = static_cast<AArch64Operand &>(*Operands[2]);
  if (Op.isScalarReg()) {
    unsigned Reg = getXRegFromWReg(Op.getReg());
    Operands[2] = AArch64Operand::CreateReg(Reg, RegKind::Scalar,
                                            Op.getStartLoc(), Op.getEndLoc(),
                                            getContext());
  }
}
// FIXME: Likewise for sxt[bh] with a Xd dst operand
else if (NumOperands == 3 && (Tok == "sxtb" || Tok == "sxth")) {
  AArch64Operand &Op = static_cast<AArch64Operand &>(*Operands[1]);
  if (Op.isScalarReg() &&
      AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
          Op.getReg())) {
    // The source register can be Wn here, but the matcher expects a
    // GPR64. Twiddle it here if necessary.
    AArch64Operand &Op = static_cast<AArch64Operand &>(*Operands[2]);
    if (Op.isScalarReg()) {
      unsigned Reg = getXRegFromWReg(Op.getReg());
      Operands[2] = AArch64Operand::CreateReg(Reg, RegKind::Scalar,
                                              Op.getStartLoc(),
                                              Op.getEndLoc(), getContext());
    }
  }
}
// FIXME: Likewise for uxt[bh] with a Xd dst operand
else if (NumOperands == 3 && (Tok == "uxtb" || Tok == "uxth")) {
  AArch64Operand &Op = static_cast<AArch64Operand &>(*Operands[1]);
  if (Op.isScalarReg() &&
      AArch64MCRegisterClasses[AArch64::GPR64allRegClassID].contains(
          Op.getReg())) {
    // The source register can be Wn here, but the matcher expects a
    // GPR32. Twiddle it here if necessary.
    AArch64Operand &Op = static_cast<AArch64Operand &>(*Operands[1]);
    if (Op.isScalarReg()) {
      unsigned Reg = getWRegFromXReg(Op.getReg());
      Operands[1] = AArch64Operand::CreateReg(Reg, RegKind::Scalar,
                                              Op.getStartLoc(),
                                              Op.getEndLoc(), getContext());
    }
  }
}

MCInst Inst;
FeatureBitset MissingFeatures;
// First try to match against the secondary set of tables containing the
// short-form NEON instructions (e.g. "fadd.2s v0, v1, v2").
unsigned MatchResult =
    MatchInstructionImpl(Operands, Inst, ErrorInfo, MissingFeatures,
                         MatchingInlineAsm, 1);

// If that fails, try against the alternate table containing long-form NEON:
// "fadd v0.2s, v1.2s, v2.2s"
if (MatchResult != Match_Success) {
  // But first, save the short-form match result: we can use it in case the
  // long-form match also fails.
  auto ShortFormNEONErrorInfo = ErrorInfo;
  auto ShortFormNEONMatchResult = MatchResult;
  auto ShortFormNEONMissingFeatures = MissingFeatures;

  MatchResult =
      MatchInstructionImpl(Operands, Inst, ErrorInfo, MissingFeatures,
                           MatchingInlineAsm, 0);

  // Now, both matches failed, and the long-form match failed on the mnemonic
  // suffix token operand.  The short-form match failure is probably more
  // relevant: use it instead.
  if (MatchResult == Match_InvalidOperand && ErrorInfo == 1 &&
      Operands.size() > 1 && ((AArch64Operand &)*Operands[1]).isToken() &&
      ((AArch64Operand &)*Operands[1]).isTokenSuffix()) {
    MatchResult = ShortFormNEONMatchResult;
    ErrorInfo = ShortFormNEONErrorInfo;
    MissingFeatures = ShortFormNEONMissingFeatures;
  }
}

switch (MatchResult) {
case Match_Success: {
  // Perform range checking and other semantic validations
  SmallVector<SMLoc, 8> OperandLocs;
  NumOperands = Operands.size();
  for (unsigned i = 1; i < NumOperands; ++i)
    OperandLocs.push_back(Operands[i]->getStartLoc());
  if (validateInstruction(Inst, IDLoc, OperandLocs))
    return true;

  Inst.setLoc(IDLoc);
  Out.emitInstruction(Inst, getSTI());
  return false;
}
case Match_MissingFeature: {
  assert(MissingFeatures.any() && "Unknown missing feature!")(static_cast <bool> (MissingFeatures.any() && "Unknown missing feature!"
) ? void (0) : __assert_fail ("MissingFeatures.any() && \"Unknown missing feature!\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 5810
, __extension__ __PRETTY_FUNCTION__));
  // Special case the error message for the very common case where only
  // a single subtarget feature is missing (neon, e.g.).
  std::string Msg = "instruction requires:";
  for (unsigned i = 0, e = MissingFeatures.size(); i != e; ++i) {
    if (MissingFeatures[i]) {
      Msg += " ";
      Msg += getSubtargetFeatureName(i);
    }
  }
  return Error(IDLoc, Msg);
}
case Match_MnemonicFail:
  return showMatchError(IDLoc, MatchResult, ErrorInfo, Operands);
case Match_InvalidOperand: {
  SMLoc ErrorLoc = IDLoc;

  if (ErrorInfo != ~0ULL) {
    if (ErrorInfo >= Operands.size())
      return Error(IDLoc, "too few operands for instruction",
                   SMRange(IDLoc, getTok().getLoc()));

    ErrorLoc = ((AArch64Operand &)*Operands[ErrorInfo]).getStartLoc();
    if (ErrorLoc == SMLoc())
      ErrorLoc = IDLoc;
  }
  // If the match failed on a suffix token operand, tweak the diagnostic
  // accordingly.
  if (((AArch64Operand &)*Operands[ErrorInfo]).isToken() &&
      ((AArch64Operand &)*Operands[ErrorInfo]).isTokenSuffix())
    MatchResult = Match_InvalidSuffix;

  return showMatchError(ErrorLoc, MatchResult, ErrorInfo, Operands);
}
case Match_InvalidTiedOperand:
case Match_InvalidMemoryIndexed1:
case Match_InvalidMemoryIndexed2:
case Match_InvalidMemoryIndexed4:
case Match_InvalidMemoryIndexed8:
case Match_InvalidMemoryIndexed16:
case Match_InvalidCondCode:
case Match_AddSubRegExtendSmall:
case Match_AddSubRegExtendLarge:
case Match_AddSubSecondSource:
case Match_LogicalSecondSource:
case Match_AddSubRegShift32:
case Match_AddSubRegShift64:
case Match_InvalidMovImm32Shift:
case Match_InvalidMovImm64Shift:
case Match_InvalidFPImm:
case Match_InvalidMemoryWExtend8:
case Match_InvalidMemoryWExtend16:
case Match_InvalidMemoryWExtend32:
case Match_InvalidMemoryWExtend64:
case Match_InvalidMemoryWExtend128:
case Match_InvalidMemoryXExtend8:
case Match_InvalidMemoryXExtend16:
case Match_InvalidMemoryXExtend32:
case Match_InvalidMemoryXExtend64:
case Match_InvalidMemoryXExtend128:
case Match_InvalidMemoryIndexed1SImm4:
case Match_InvalidMemoryIndexed2SImm4:
case Match_InvalidMemoryIndexed3SImm4:
case Match_InvalidMemoryIndexed4SImm4:
case Match_InvalidMemoryIndexed1SImm6:
case Match_InvalidMemoryIndexed16SImm4:
case Match_InvalidMemoryIndexed32SImm4:
case Match_InvalidMemoryIndexed4SImm7:
case Match_InvalidMemoryIndexed8SImm7:
case Match_InvalidMemoryIndexed16SImm7:
case Match_InvalidMemoryIndexed8UImm5:
case Match_InvalidMemoryIndexed4UImm5:
case Match_InvalidMemoryIndexed2UImm5:
case Match_InvalidMemoryIndexed1UImm6:
case Match_InvalidMemoryIndexed2UImm6:
case Match_InvalidMemoryIndexed4UImm6:
case Match_InvalidMemoryIndexed8UImm6:
case Match_InvalidMemoryIndexed16UImm6:
case Match_InvalidMemoryIndexedSImm6:
case Match_InvalidMemoryIndexedSImm5:
case Match_InvalidMemoryIndexedSImm8:
case Match_InvalidMemoryIndexedSImm9:
case Match_InvalidMemoryIndexed16SImm9:
case Match_InvalidMemoryIndexed8SImm10:
case Match_InvalidImm0_0:
case Match_InvalidImm0_1:
case Match_InvalidImm0_3:
case Match_InvalidImm0_7:
case Match_InvalidImm0_15:
case Match_InvalidImm0_31:
case Match_InvalidImm0_63:
case Match_InvalidImm0_127:
case Match_InvalidImm0_255:
case Match_InvalidImm0_65535:
case Match_InvalidImm1_8:
case Match_InvalidImm1_16:
case Match_InvalidImm1_32:
case Match_InvalidImm1_64:
case Match_InvalidSVEAddSubImm8:
case Match_InvalidSVEAddSubImm16:
case Match_InvalidSVEAddSubImm32:
case Match_InvalidSVEAddSubImm64:
case Match_InvalidSVECpyImm8:
case Match_InvalidSVECpyImm16:
case Match_InvalidSVECpyImm32:
case Match_InvalidSVECpyImm64:
case Match_InvalidIndexRange0_0:
case Match_InvalidIndexRange1_1:
case Match_InvalidIndexRange0_15:
case Match_InvalidIndexRange0_7:
case Match_InvalidIndexRange0_3:
case Match_InvalidIndexRange0_1:
case Match_InvalidSVEIndexRange0_63:
case Match_InvalidSVEIndexRange0_31:
case Match_InvalidSVEIndexRange0_15:
case Match_InvalidSVEIndexRange0_7:
case Match_InvalidSVEIndexRange0_3:
case Match_InvalidLabel:
case Match_InvalidComplexRotationEven:
case Match_InvalidComplexRotationOdd:
case Match_InvalidGPR64shifted8:
case Match_InvalidGPR64shifted16:
case Match_InvalidGPR64shifted32:
case Match_InvalidGPR64shifted64:
case Match_InvalidGPR64shifted128:
case Match_InvalidGPR64NoXZRshifted8:
case Match_InvalidGPR64NoXZRshifted16:
case Match_InvalidGPR64NoXZRshifted32:
case Match_InvalidGPR64NoXZRshifted64:
case Match_InvalidGPR64NoXZRshifted128:
case Match_InvalidZPR32UXTW8:
case Match_InvalidZPR32UXTW16:
case Match_InvalidZPR32UXTW32:
case Match_InvalidZPR32UXTW64:
case Match_InvalidZPR32SXTW8:
case Match_InvalidZPR32SXTW16:
case Match_InvalidZPR32SXTW32:
case Match_InvalidZPR32SXTW64:
case Match_InvalidZPR64UXTW8:
case Match_InvalidZPR64SXTW8:
case Match_InvalidZPR64UXTW16:
case Match_InvalidZPR64SXTW16:
case Match_InvalidZPR64UXTW32:
case Match_InvalidZPR64SXTW32:
case Match_InvalidZPR64UXTW64:
case Match_InvalidZPR64SXTW64:
case Match_InvalidZPR32LSL8:
case Match_InvalidZPR32LSL16:
case Match_InvalidZPR32LSL32:
case Match_InvalidZPR32LSL64:
case Match_InvalidZPR64LSL8:
case Match_InvalidZPR64LSL16:
case Match_InvalidZPR64LSL32:
case Match_InvalidZPR64LSL64:
case Match_InvalidZPR0:
case Match_InvalidZPR8:
case Match_InvalidZPR16:
case Match_InvalidZPR32:
case Match_InvalidZPR64:
case Match_InvalidZPR128:
case Match_InvalidZPR_3b8:
case Match_InvalidZPR_3b16:
case Match_InvalidZPR_3b32:
case Match_InvalidZPR_4b16:
case Match_InvalidZPR_4b32:
case Match_InvalidZPR_4b64:
case Match_InvalidSVEPredicateAnyReg:
case Match_InvalidSVEPattern:
case Match_InvalidSVEPredicateBReg:
case Match_InvalidSVEPredicateHReg:
case Match_InvalidSVEPredicateSReg:
case Match_InvalidSVEPredicateDReg:
case Match_InvalidSVEPredicate3bAnyReg:
case Match_InvalidSVEExactFPImmOperandHalfOne:
case Match_InvalidSVEExactFPImmOperandHalfTwo:
case Match_InvalidSVEExactFPImmOperandZeroOne:
case Match_InvalidMatrixTile32:
case Match_InvalidMatrixTile64:
case Match_InvalidMatrix:
case Match_InvalidMatrixTileVectorH8:
case Match_InvalidMatrixTileVectorH16:
case Match_InvalidMatrixTileVectorH32:
case Match_InvalidMatrixTileVectorH64:
case Match_InvalidMatrixTileVectorH128:
case Match_InvalidMatrixTileVectorV8:
case Match_InvalidMatrixTileVectorV16:
case Match_InvalidMatrixTileVectorV32:
case Match_InvalidMatrixTileVectorV64:
case Match_InvalidMatrixTileVectorV128:
case Match_InvalidSVCR:
case Match_InvalidMatrixIndexGPR32_12_15:
case Match_MSR:
case Match_MRS: {
  if (ErrorInfo >= Operands.size())
    return Error(IDLoc, "too few operands for instruction", SMRange(IDLoc, (*Operands.back()).getEndLoc()));
  // Any time we get here, there's nothing fancy to do. Just get the
  // operand SMLoc and display the diagnostic.
  SMLoc ErrorLoc = ((AArch64Operand &)*Operands[ErrorInfo]).getStartLoc();
  if (ErrorLoc == SMLoc())
    ErrorLoc = IDLoc;
  return showMatchError(ErrorLoc, MatchResult, ErrorInfo, Operands);
}
}

llvm_unreachable("Implement any new match types added!")::llvm::llvm_unreachable_internal("Implement any new match types added!"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 6014
);
6015}

6017/// ParseDirective parses the arm specific directives
6018bool AArch64AsmParser::ParseDirective(AsmToken DirectiveID) {
const MCContext::Environment Format = getContext().getObjectFileType();
bool IsMachO = Format == MCContext::IsMachO;
bool IsCOFF = Format == MCContext::IsCOFF;

auto IDVal = DirectiveID.getIdentifier().lower();
SMLoc Loc = DirectiveID.getLoc();
if (IDVal == ".arch")
  parseDirectiveArch(Loc);
else if (IDVal == ".cpu")
  parseDirectiveCPU(Loc);
else if (IDVal == ".tlsdesccall")
  parseDirectiveTLSDescCall(Loc);
else if (IDVal == ".ltorg" || IDVal == ".pool")
  parseDirectiveLtorg(Loc);
else if (IDVal == ".unreq")
  parseDirectiveUnreq(Loc);
else if (IDVal == ".inst")
  parseDirectiveInst(Loc);
else if (IDVal == ".cfi_negate_ra_state")
  parseDirectiveCFINegateRAState();
else if (IDVal == ".cfi_b_key_frame")
  parseDirectiveCFIBKeyFrame();
else if (IDVal == ".arch_extension")
  parseDirectiveArchExtension(Loc);
else if (IDVal == ".variant_pcs")
  parseDirectiveVariantPCS(Loc);
else if (IsMachO) {
  if (IDVal == MCLOHDirectiveName())
    parseDirectiveLOH(IDVal, Loc);
  else
    return true;
} else if (IsCOFF) {
  if (IDVal == ".seh_stackalloc")
    parseDirectiveSEHAllocStack(Loc);
  else if (IDVal == ".seh_endprologue")
    parseDirectiveSEHPrologEnd(Loc);
  else if (IDVal == ".seh_save_r19r20_x")
    parseDirectiveSEHSaveR19R20X(Loc);
  else if (IDVal == ".seh_save_fplr")
    parseDirectiveSEHSaveFPLR(Loc);
  else if (IDVal == ".seh_save_fplr_x")
    parseDirectiveSEHSaveFPLRX(Loc);
  else if (IDVal == ".seh_save_reg")
    parseDirectiveSEHSaveReg(Loc);
  else if (IDVal == ".seh_save_reg_x")
    parseDirectiveSEHSaveRegX(Loc);
  else if (IDVal == ".seh_save_regp")
    parseDirectiveSEHSaveRegP(Loc);
  else if (IDVal == ".seh_save_regp_x")
    parseDirectiveSEHSaveRegPX(Loc);
  else if (IDVal == ".seh_save_lrpair")
    parseDirectiveSEHSaveLRPair(Loc);
  else if (IDVal == ".seh_save_freg")
    parseDirectiveSEHSaveFReg(Loc);
  else if (IDVal == ".seh_save_freg_x")
    parseDirectiveSEHSaveFRegX(Loc);
  else if (IDVal == ".seh_save_fregp")
    parseDirectiveSEHSaveFRegP(Loc);
  else if (IDVal == ".seh_save_fregp_x")
    parseDirectiveSEHSaveFRegPX(Loc);
  else if (IDVal == ".seh_set_fp")
    parseDirectiveSEHSetFP(Loc);
  else if (IDVal == ".seh_add_fp")
    parseDirectiveSEHAddFP(Loc);
  else if (IDVal == ".seh_nop")
    parseDirectiveSEHNop(Loc);
  else if (IDVal == ".seh_save_next")
    parseDirectiveSEHSaveNext(Loc);
  else if (IDVal == ".seh_startepilogue")
    parseDirectiveSEHEpilogStart(Loc);
  else if (IDVal == ".seh_endepilogue")
    parseDirectiveSEHEpilogEnd(Loc);
  else if (IDVal == ".seh_trap_frame")
    parseDirectiveSEHTrapFrame(Loc);
  else if (IDVal == ".seh_pushframe")
    parseDirectiveSEHMachineFrame(Loc);
  else if (IDVal == ".seh_context")
    parseDirectiveSEHContext(Loc);
  else if (IDVal == ".seh_clear_unwound_to_call")
    parseDirectiveSEHClearUnwoundToCall(Loc);
  else
    return true;
} else
  return true;
return false;
6104}

6106static void ExpandCryptoAEK(AArch64::ArchKind ArchKind,
                          SmallVector<StringRef, 4> &RequestedExtensions) {
const bool NoCrypto = llvm::is_contained(RequestedExtensions, "nocrypto");
const bool Crypto = llvm::is_contained(RequestedExtensions, "crypto");

if (!NoCrypto && Crypto) {
  switch (ArchKind) {
  default:
    // Map 'generic' (and others) to sha2 and aes, because
    // that was the traditional meaning of crypto.
  case AArch64::ArchKind::ARMV8_1A:
  case AArch64::ArchKind::ARMV8_2A:
  case AArch64::ArchKind::ARMV8_3A:
    RequestedExtensions.push_back("sha2");
    RequestedExtensions.push_back("aes");
    break;
  case AArch64::ArchKind::ARMV8_4A:
  case AArch64::ArchKind::ARMV8_5A:
  case AArch64::ArchKind::ARMV8_6A:
  case AArch64::ArchKind::ARMV8_7A:
  case AArch64::ArchKind::ARMV8_8A:
  case AArch64::ArchKind::ARMV9A:
  case AArch64::ArchKind::ARMV9_1A:
  case AArch64::ArchKind::ARMV9_2A:
  case AArch64::ArchKind::ARMV9_3A:
  case AArch64::ArchKind::ARMV8R:
    RequestedExtensions.push_back("sm4");
    RequestedExtensions.push_back("sha3");
    RequestedExtensions.push_back("sha2");
    RequestedExtensions.push_back("aes");
    break;
  }
} else if (NoCrypto) {
  switch (ArchKind) {
  default:
    // Map 'generic' (and others) to sha2 and aes, because
    // that was the traditional meaning of crypto.
  case AArch64::ArchKind::ARMV8_1A:
  case AArch64::ArchKind::ARMV8_2A:
  case AArch64::ArchKind::ARMV8_3A:
    RequestedExtensions.push_back("nosha2");
    RequestedExtensions.push_back("noaes");
    break;
  case AArch64::ArchKind::ARMV8_4A:
  case AArch64::ArchKind::ARMV8_5A:
  case AArch64::ArchKind::ARMV8_6A:
  case AArch64::ArchKind::ARMV8_7A:
  case AArch64::ArchKind::ARMV8_8A:
  case AArch64::ArchKind::ARMV9A:
  case AArch64::ArchKind::ARMV9_1A:
  case AArch64::ArchKind::ARMV9_2A:
    RequestedExtensions.push_back("nosm4");
    RequestedExtensions.push_back("nosha3");
    RequestedExtensions.push_back("nosha2");
    RequestedExtensions.push_back("noaes");
    break;
  }
}
6164}

6166/// parseDirectiveArch
6167///   ::= .arch token
6168bool AArch64AsmParser::parseDirectiveArch(SMLoc L) {
SMLoc ArchLoc = getLoc();

StringRef Arch, ExtensionString;
std::tie(Arch, ExtensionString) =
    getParser().parseStringToEndOfStatement().trim().split('+');

AArch64::ArchKind ID = AArch64::parseArch(Arch);
if (ID == AArch64::ArchKind::INVALID)
  return Error(ArchLoc, "unknown arch name");

if (parseToken(AsmToken::EndOfStatement))
  return true;

// Get the architecture and extension features.
std::vector<StringRef> AArch64Features;
AArch64::getArchFeatures(ID, AArch64Features);
AArch64::getExtensionFeatures(AArch64::getDefaultExtensions("generic", ID),
                              AArch64Features);

MCSubtargetInfo &STI = copySTI();
std::vector<std::string> ArchFeatures(AArch64Features.begin(), AArch64Features.end());
STI.setDefaultFeatures("generic", /*TuneCPU*/ "generic",
                       join(ArchFeatures.begin(), ArchFeatures.end(), ","));

SmallVector<StringRef, 4> RequestedExtensions;
if (!ExtensionString.empty())
  ExtensionString.split(RequestedExtensions, '+');

ExpandCryptoAEK(ID, RequestedExtensions);

FeatureBitset Features = STI.getFeatureBits();
for (auto Name : RequestedExtensions) {
  bool EnableFeature = true;

  if (Name.startswith_insensitive("no")) {
    EnableFeature = false;
    Name = Name.substr(2);
  }

  for (const auto &Extension : ExtensionMap) {
    if (Extension.Name != Name)
      continue;

    if (Extension.Features.none())
      report_fatal_error("unsupported architectural extension: " + Name);

    FeatureBitset ToggleFeatures =
        EnableFeature
            ? STI.SetFeatureBitsTransitively(~Features & Extension.Features)
            : STI.ToggleFeature(Features & Extension.Features);
    setAvailableFeatures(ComputeAvailableFeatures(ToggleFeatures));
    break;
  }
}
return false;
6224}

6226/// parseDirectiveArchExtension
6227///   ::= .arch_extension [no]feature
6228bool AArch64AsmParser::parseDirectiveArchExtension(SMLoc L) {
SMLoc ExtLoc = getLoc();

StringRef Name = getParser().parseStringToEndOfStatement().trim();

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.arch_extension' directive"))
  return true;

bool EnableFeature = true;
if (Name.startswith_insensitive("no")) {
  EnableFeature = false;
  Name = Name.substr(2);
}

MCSubtargetInfo &STI = copySTI();
FeatureBitset Features = STI.getFeatureBits();
for (const auto &Extension : ExtensionMap) {
  if (Extension.Name != Name)
    continue;

  if (Extension.Features.none())
    return Error(ExtLoc, "unsupported architectural extension: " + Name);

  FeatureBitset ToggleFeatures =
      EnableFeature
          ? STI.SetFeatureBitsTransitively(~Features & Extension.Features)
          : STI.ToggleFeature(Features & Extension.Features);
  setAvailableFeatures(ComputeAvailableFeatures(ToggleFeatures));
  return false;
}

return Error(ExtLoc, "unknown architectural extension: " + Name);
6261}

6263static SMLoc incrementLoc(SMLoc L, int Offset) {
return SMLoc::getFromPointer(L.getPointer() + Offset);
6265}

6267/// parseDirectiveCPU
6268///   ::= .cpu id
6269bool AArch64AsmParser::parseDirectiveCPU(SMLoc L) {
SMLoc CurLoc = getLoc();

StringRef CPU, ExtensionString;
std::tie(CPU, ExtensionString) =
    getParser().parseStringToEndOfStatement().trim().split('+');

if (parseToken(AsmToken::EndOfStatement))
  return true;

SmallVector<StringRef, 4> RequestedExtensions;
if (!ExtensionString.empty())
  ExtensionString.split(RequestedExtensions, '+');

// FIXME This is using tablegen data, but should be moved to ARMTargetParser
// once that is tablegen'ed
if (!getSTI().isCPUStringValid(CPU)) {
  Error(CurLoc, "unknown CPU name");
  return false;
}

MCSubtargetInfo &STI = copySTI();
STI.setDefaultFeatures(CPU, /*TuneCPU*/ CPU, "");
CurLoc = incrementLoc(CurLoc, CPU.size());

ExpandCryptoAEK(llvm::AArch64::getCPUArchKind(CPU), RequestedExtensions);

for (auto Name : RequestedExtensions) {
  // Advance source location past '+'.
  CurLoc = incrementLoc(CurLoc, 1);

  bool EnableFeature = true;

  if (Name.startswith_insensitive("no")) {
    EnableFeature = false;
    Name = Name.substr(2);
  }

  bool FoundExtension = false;
  for (const auto &Extension : ExtensionMap) {
    if (Extension.Name != Name)
      continue;

    if (Extension.Features.none())
      report_fatal_error("unsupported architectural extension: " + Name);

    FeatureBitset Features = STI.getFeatureBits();
    FeatureBitset ToggleFeatures =
        EnableFeature
            ? STI.SetFeatureBitsTransitively(~Features & Extension.Features)
            : STI.ToggleFeature(Features & Extension.Features);
    setAvailableFeatures(ComputeAvailableFeatures(ToggleFeatures));
    FoundExtension = true;

    break;
  }

  if (!FoundExtension)
    Error(CurLoc, "unsupported architectural extension");

  CurLoc = incrementLoc(CurLoc, Name.size());
}
return false;
6332}

6334/// parseDirectiveInst
6335///  ::= .inst opcode [, ...]
6336bool AArch64AsmParser::parseDirectiveInst(SMLoc Loc) {
if (getLexer().is(AsmToken::EndOfStatement))
  return Error(Loc, "expected expression following '.inst' directive");

auto parseOp = [&]() -> bool {
  SMLoc L = getLoc();
  const MCExpr *Expr = nullptr;
  if (check(getParser().parseExpression(Expr), L, "expected expression"))
1
Assuming the condition is false→
2
←
Taking false branch→
    return true;
  const MCConstantExpr *Value = dyn_cast_or_null<MCConstantExpr>(Expr);
3
←
Assuming null pointer is passed into cast→
4
←
'Value' initialized to a null pointer value→
  if (check(!Value, L, "expected constant expression"))
5
←
Assuming the condition is false→
6
←
Taking false branch→
    return true;
  getTargetStreamer().emitInst(Value->getValue());
7
←
Called C++ object pointer is null
  return false;
};

return parseMany(parseOp);
6353}

6355// parseDirectiveTLSDescCall:
6356//   ::= .tlsdesccall symbol
6357bool AArch64AsmParser::parseDirectiveTLSDescCall(SMLoc L) {
StringRef Name;
if (check(getParser().parseIdentifier(Name), L,
          "expected symbol after directive") ||
    parseToken(AsmToken::EndOfStatement))
  return true;

MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
const MCExpr *Expr = MCSymbolRefExpr::create(Sym, getContext());
Expr = AArch64MCExpr::create(Expr, AArch64MCExpr::VK_TLSDESC, getContext());

MCInst Inst;
Inst.setOpcode(AArch64::TLSDESCCALL);
Inst.addOperand(MCOperand::createExpr(Expr));

getParser().getStreamer().emitInstruction(Inst, getSTI());
return false;
6374}

6376/// ::= .loh <lohName | lohId> label1, ..., labelN
6377/// The number of arguments depends on the loh identifier.
6378bool AArch64AsmParser::parseDirectiveLOH(StringRef IDVal, SMLoc Loc) {
MCLOHType Kind;
if (getTok().isNot(AsmToken::Identifier)) {
  if (getTok().isNot(AsmToken::Integer))
    return TokError("expected an identifier or a number in directive");
  // We successfully get a numeric value for the identifier.
  // Check if it is valid.
  int64_t Id = getTok().getIntVal();
  if (Id <= -1U && !isValidMCLOHType(Id))
    return TokError("invalid numeric identifier in directive");
  Kind = (MCLOHType)Id;
} else {
  StringRef Name = getTok().getIdentifier();
  // We successfully parse an identifier.
  // Check if it is a recognized one.
  int Id = MCLOHNameToId(Name);

  if (Id == -1)
    return TokError("invalid identifier in directive");
  Kind = (MCLOHType)Id;
}
// Consume the identifier.
Lex();
// Get the number of arguments of this LOH.
int NbArgs = MCLOHIdToNbArgs(Kind);

assert(NbArgs != -1 && "Invalid number of arguments")(static_cast <bool> (NbArgs != -1 && "Invalid number of arguments"
) ? void (0) : __assert_fail ("NbArgs != -1 && \"Invalid number of arguments\""
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 6404
, __extension__ __PRETTY_FUNCTION__));

SmallVector<MCSymbol *, 3> Args;
for (int Idx = 0; Idx < NbArgs; ++Idx) {
  StringRef Name;
  if (getParser().parseIdentifier(Name))
    return TokError("expected identifier in directive");
  Args.push_back(getContext().getOrCreateSymbol(Name));

  if (Idx + 1 == NbArgs)
    break;
  if (parseToken(AsmToken::Comma,
                 "unexpected token in '" + Twine(IDVal) + "' directive"))
    return true;
}
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '" + Twine(IDVal) + "' directive"))
  return true;

getStreamer().emitLOHDirective((MCLOHType)Kind, Args);
return false;
6425}

6427/// parseDirectiveLtorg
6428///  ::= .ltorg | .pool
6429bool AArch64AsmParser::parseDirectiveLtorg(SMLoc L) {
if (parseToken(AsmToken::EndOfStatement, "unexpected token in directive"))
  return true;
getTargetStreamer().emitCurrentConstantPool();
return false;
6434}

6436/// parseDirectiveReq
6437///  ::= name .req registername
6438bool AArch64AsmParser::parseDirectiveReq(StringRef Name, SMLoc L) {
Lex(); // Eat the '.req' token.
SMLoc SRegLoc = getLoc();
RegKind RegisterKind = RegKind::Scalar;
unsigned RegNum;
OperandMatchResultTy ParseRes = tryParseScalarRegister(RegNum);

if (ParseRes != MatchOperand_Success) {
  StringRef Kind;
  RegisterKind = RegKind::NeonVector;
  ParseRes = tryParseVectorRegister(RegNum, Kind, RegKind::NeonVector);

  if (ParseRes == MatchOperand_ParseFail)
    return true;

  if (ParseRes == MatchOperand_Success && !Kind.empty())
    return Error(SRegLoc, "vector register without type specifier expected");
}

if (ParseRes != MatchOperand_Success) {
  StringRef Kind;
  RegisterKind = RegKind::SVEDataVector;
  ParseRes =
      tryParseVectorRegister(RegNum, Kind, RegKind::SVEDataVector);

  if (ParseRes == MatchOperand_ParseFail)
    return true;

  if (ParseRes == MatchOperand_Success && !Kind.empty())
    return Error(SRegLoc,
                 "sve vector register without type specifier expected");
}

if (ParseRes != MatchOperand_Success) {
  StringRef Kind;
  RegisterKind = RegKind::SVEPredicateVector;
  ParseRes = tryParseVectorRegister(RegNum, Kind, RegKind::SVEPredicateVector);

  if (ParseRes == MatchOperand_ParseFail)
    return true;

  if (ParseRes == MatchOperand_Success && !Kind.empty())
    return Error(SRegLoc,
                 "sve predicate register without type specifier expected");
}

if (ParseRes != MatchOperand_Success)
  return Error(SRegLoc, "register name or alias expected");

// Shouldn't be anything else.
if (parseToken(AsmToken::EndOfStatement,
               "unexpected input in .req directive"))
  return true;

auto pair = std::make_pair(RegisterKind, (unsigned) RegNum);
if (RegisterReqs.insert(std::make_pair(Name, pair)).first->second != pair)
  Warning(L, "ignoring redefinition of register alias '" + Name + "'");

return false;
6497}

6499/// parseDirectiveUneq
6500///  ::= .unreq registername
6501bool AArch64AsmParser::parseDirectiveUnreq(SMLoc L) {
if (getTok().isNot(AsmToken::Identifier))
  return TokError("unexpected input in .unreq directive.");
RegisterReqs.erase(getTok().getIdentifier().lower());
Lex(); // Eat the identifier.
return parseToken(AsmToken::EndOfStatement);
6507}

6509bool AArch64AsmParser::parseDirectiveCFINegateRAState() {
if (parseToken(AsmToken::EndOfStatement, "unexpected token in directive"))
  return true;
getStreamer().emitCFINegateRAState();
return false;
6514}

6516/// parseDirectiveCFIBKeyFrame
6517/// ::= .cfi_b_key
6518bool AArch64AsmParser::parseDirectiveCFIBKeyFrame() {
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.cfi_b_key_frame'"))
  return true;
getStreamer().emitCFIBKeyFrame();
return false;
6524}

6526/// parseDirectiveVariantPCS
6527/// ::= .variant_pcs symbolname
6528bool AArch64AsmParser::parseDirectiveVariantPCS(SMLoc L) {
StringRef Name;
if (getParser().parseIdentifier(Name))
  return TokError("expected symbol name");
if (parseEOL())
  return true;
getTargetStreamer().emitDirectiveVariantPCS(
    getContext().getOrCreateSymbol(Name));
return false;
6537}

6539/// parseDirectiveSEHAllocStack
6540/// ::= .seh_stackalloc
6541bool AArch64AsmParser::parseDirectiveSEHAllocStack(SMLoc L) {
int64_t Size;
if (parseImmExpr(Size))
  return true;
getTargetStreamer().emitARM64WinCFIAllocStack(Size);
return false;
6547}

6549/// parseDirectiveSEHPrologEnd
6550/// ::= .seh_endprologue
6551bool AArch64AsmParser::parseDirectiveSEHPrologEnd(SMLoc L) {
getTargetStreamer().emitARM64WinCFIPrologEnd();
return false;
6554}

6556/// parseDirectiveSEHSaveR19R20X
6557/// ::= .seh_save_r19r20_x
6558bool AArch64AsmParser::parseDirectiveSEHSaveR19R20X(SMLoc L) {
int64_t Offset;
if (parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveR19R20X(Offset);
return false;
6564}

6566/// parseDirectiveSEHSaveFPLR
6567/// ::= .seh_save_fplr
6568bool AArch64AsmParser::parseDirectiveSEHSaveFPLR(SMLoc L) {
int64_t Offset;
if (parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveFPLR(Offset);
return false;
6574}

6576/// parseDirectiveSEHSaveFPLRX
6577/// ::= .seh_save_fplr_x
6578bool AArch64AsmParser::parseDirectiveSEHSaveFPLRX(SMLoc L) {
int64_t Offset;
if (parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveFPLRX(Offset);
return false;
6584}

6586/// parseDirectiveSEHSaveReg
6587/// ::= .seh_save_reg
6588bool AArch64AsmParser::parseDirectiveSEHSaveReg(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::X0, AArch64::X19, AArch64::LR) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveReg(Reg, Offset);
return false;
6596}

6598/// parseDirectiveSEHSaveRegX
6599/// ::= .seh_save_reg_x
6600bool AArch64AsmParser::parseDirectiveSEHSaveRegX(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::X0, AArch64::X19, AArch64::LR) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveRegX(Reg, Offset);
return false;
6608}

6610/// parseDirectiveSEHSaveRegP
6611/// ::= .seh_save_regp
6612bool AArch64AsmParser::parseDirectiveSEHSaveRegP(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::X0, AArch64::X19, AArch64::FP) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveRegP(Reg, Offset);
return false;
6620}

6622/// parseDirectiveSEHSaveRegPX
6623/// ::= .seh_save_regp_x
6624bool AArch64AsmParser::parseDirectiveSEHSaveRegPX(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::X0, AArch64::X19, AArch64::FP) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveRegPX(Reg, Offset);
return false;
6632}

6634/// parseDirectiveSEHSaveLRPair
6635/// ::= .seh_save_lrpair
6636bool AArch64AsmParser::parseDirectiveSEHSaveLRPair(SMLoc L) {
unsigned Reg;
int64_t Offset;
L = getLoc();
if (parseRegisterInRange(Reg, AArch64::X0, AArch64::X19, AArch64::LR) ||
    parseComma() || parseImmExpr(Offset))
  return true;
if (check(((Reg - 19) % 2 != 0), L,
          "expected register with even offset from x19"))
  return true;
getTargetStreamer().emitARM64WinCFISaveLRPair(Reg, Offset);
return false;
6648}

6650/// parseDirectiveSEHSaveFReg
6651/// ::= .seh_save_freg
6652bool AArch64AsmParser::parseDirectiveSEHSaveFReg(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::D0, AArch64::D8, AArch64::D15) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveFReg(Reg, Offset);
return false;
6660}

6662/// parseDirectiveSEHSaveFRegX
6663/// ::= .seh_save_freg_x
6664bool AArch64AsmParser::parseDirectiveSEHSaveFRegX(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::D0, AArch64::D8, AArch64::D15) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveFRegX(Reg, Offset);
return false;
6672}

6674/// parseDirectiveSEHSaveFRegP
6675/// ::= .seh_save_fregp
6676bool AArch64AsmParser::parseDirectiveSEHSaveFRegP(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::D0, AArch64::D8, AArch64::D14) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveFRegP(Reg, Offset);
return false;
6684}

6686/// parseDirectiveSEHSaveFRegPX
6687/// ::= .seh_save_fregp_x
6688bool AArch64AsmParser::parseDirectiveSEHSaveFRegPX(SMLoc L) {
unsigned Reg;
int64_t Offset;
if (parseRegisterInRange(Reg, AArch64::D0, AArch64::D8, AArch64::D14) ||
    parseComma() || parseImmExpr(Offset))
  return true;
getTargetStreamer().emitARM64WinCFISaveFRegPX(Reg, Offset);
return false;
6696}

6698/// parseDirectiveSEHSetFP
6699/// ::= .seh_set_fp
6700bool AArch64AsmParser::parseDirectiveSEHSetFP(SMLoc L) {
getTargetStreamer().emitARM64WinCFISetFP();
return false;
6703}

6705/// parseDirectiveSEHAddFP
6706/// ::= .seh_add_fp
6707bool AArch64AsmParser::parseDirectiveSEHAddFP(SMLoc L) {
int64_t Size;
if (parseImmExpr(Size))
  return true;
getTargetStreamer().emitARM64WinCFIAddFP(Size);
return false;
6713}

6715/// parseDirectiveSEHNop
6716/// ::= .seh_nop
6717bool AArch64AsmParser::parseDirectiveSEHNop(SMLoc L) {
getTargetStreamer().emitARM64WinCFINop();
return false;
6720}

6722/// parseDirectiveSEHSaveNext
6723/// ::= .seh_save_next
6724bool AArch64AsmParser::parseDirectiveSEHSaveNext(SMLoc L) {
getTargetStreamer().emitARM64WinCFISaveNext();
return false;
6727}

6729/// parseDirectiveSEHEpilogStart
6730/// ::= .seh_startepilogue
6731bool AArch64AsmParser::parseDirectiveSEHEpilogStart(SMLoc L) {
getTargetStreamer().emitARM64WinCFIEpilogStart();
return false;
6734}

6736/// parseDirectiveSEHEpilogEnd
6737/// ::= .seh_endepilogue
6738bool AArch64AsmParser::parseDirectiveSEHEpilogEnd(SMLoc L) {
getTargetStreamer().emitARM64WinCFIEpilogEnd();
return false;
6741}

6743/// parseDirectiveSEHTrapFrame
6744/// ::= .seh_trap_frame
6745bool AArch64AsmParser::parseDirectiveSEHTrapFrame(SMLoc L) {
getTargetStreamer().emitARM64WinCFITrapFrame();
return false;
6748}

6750/// parseDirectiveSEHMachineFrame
6751/// ::= .seh_pushframe
6752bool AArch64AsmParser::parseDirectiveSEHMachineFrame(SMLoc L) {
getTargetStreamer().emitARM64WinCFIMachineFrame();
return false;
6755}

6757/// parseDirectiveSEHContext
6758/// ::= .seh_context
6759bool AArch64AsmParser::parseDirectiveSEHContext(SMLoc L) {
getTargetStreamer().emitARM64WinCFIContext();
return false;
6762}

6764/// parseDirectiveSEHClearUnwoundToCall
6765/// ::= .seh_clear_unwound_to_call
6766bool AArch64AsmParser::parseDirectiveSEHClearUnwoundToCall(SMLoc L) {
getTargetStreamer().emitARM64WinCFIClearUnwoundToCall();
return false;
6769}

6771bool
6772AArch64AsmParser::classifySymbolRef(const MCExpr *Expr,
                                  AArch64MCExpr::VariantKind &ELFRefKind,
                                  MCSymbolRefExpr::VariantKind &DarwinRefKind,
                                  int64_t &Addend) {
ELFRefKind = AArch64MCExpr::VK_INVALID;
DarwinRefKind = MCSymbolRefExpr::VK_None;
Addend = 0;

if (const AArch64MCExpr *AE = dyn_cast<AArch64MCExpr>(Expr)) {
  ELFRefKind = AE->getKind();
  Expr = AE->getSubExpr();
}

const MCSymbolRefExpr *SE = dyn_cast<MCSymbolRefExpr>(Expr);
if (SE) {
  // It's a simple symbol reference with no addend.
  DarwinRefKind = SE->getKind();
  return true;
}

// Check that it looks like a symbol + an addend
MCValue Res;
bool Relocatable = Expr->evaluateAsRelocatable(Res, nullptr, nullptr);
if (!Relocatable || Res.getSymB())
  return false;

// Treat expressions with an ELFRefKind (like ":abs_g1:3", or
// ":abs_g1:x" where x is constant) as symbolic even if there is no symbol.
if (!Res.getSymA() && ELFRefKind == AArch64MCExpr::VK_INVALID)
  return false;

if (Res.getSymA())
  DarwinRefKind = Res.getSymA()->getKind();
Addend = Res.getConstant();

// It's some symbol reference + a constant addend, but really
// shouldn't use both Darwin and ELF syntax.
return ELFRefKind == AArch64MCExpr::VK_INVALID ||
       DarwinRefKind == MCSymbolRefExpr::VK_None;
6811}

6813/// Force static initialization.
6814extern "C" LLVM_EXTERNAL_VISIBILITY__attribute__((visibility("default"))) void LLVMInitializeAArch64AsmParser() {
RegisterMCAsmParser<AArch64AsmParser> X(getTheAArch64leTarget());
RegisterMCAsmParser<AArch64AsmParser> Y(getTheAArch64beTarget());
RegisterMCAsmParser<AArch64AsmParser> Z(getTheARM64Target());
RegisterMCAsmParser<AArch64AsmParser> W(getTheARM64_32Target());
RegisterMCAsmParser<AArch64AsmParser> V(getTheAArch64_32Target());
6820}

6822#define GET_REGISTER_MATCHER
6823#define GET_SUBTARGET_FEATURE_NAME
6824#define GET_MATCHER_IMPLEMENTATION
6825#define GET_MNEMONIC_SPELL_CHECKER
6826#include "AArch64GenAsmMatcher.inc"

6828// Define this matcher function after the auto-generated include so we
6829// have the match class enum definitions.
6830unsigned AArch64AsmParser::validateTargetOperandClass(MCParsedAsmOperand &AsmOp,
                                                    unsigned Kind) {
AArch64Operand &Op = static_cast<AArch64Operand &>(AsmOp);
// If the kind is a token for a literal immediate, check if our asm
// operand matches. This is for InstAliases which have a fixed-value
// immediate in the syntax.
int64_t ExpectedVal;
switch (Kind) {
default:
  return Match_InvalidOperand;
case MCK__HASH_0:
  ExpectedVal = 0;
  break;
case MCK__HASH_1:
  ExpectedVal = 1;
  break;
case MCK__HASH_12:
  ExpectedVal = 12;
  break;
case MCK__HASH_16:
  ExpectedVal = 16;
  break;
case MCK__HASH_2:
  ExpectedVal = 2;
  break;
case MCK__HASH_24:
  ExpectedVal = 24;
  break;
case MCK__HASH_3:
  ExpectedVal = 3;
  break;
case MCK__HASH_32:
  ExpectedVal = 32;
  break;
case MCK__HASH_4:
  ExpectedVal = 4;
  break;
case MCK__HASH_48:
  ExpectedVal = 48;
  break;
case MCK__HASH_6:
  ExpectedVal = 6;
  break;
case MCK__HASH_64:
  ExpectedVal = 64;
  break;
case MCK__HASH_8:
  ExpectedVal = 8;
  break;
case MCK_MPR:
  // If the Kind is a token for the MPR register class which has the "za"
  // register (SME accumulator array), check if the asm is a literal "za"
  // token. This is for the "smstart za" alias that defines the register
  // as a literal token.
  if (Op.isTokenEqual("za"))
    return Match_Success;
  return Match_InvalidOperand;
}
if (!Op.isImm())
  return Match_InvalidOperand;
const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Op.getImm());
if (!CE)
  return Match_InvalidOperand;
if (CE->getValue() == ExpectedVal)
  return Match_Success;
return Match_InvalidOperand;
6896}

6898OperandMatchResultTy
6899AArch64AsmParser::tryParseGPRSeqPair(OperandVector &Operands) {

SMLoc S = getLoc();

if (getTok().isNot(AsmToken::Identifier)) {
  Error(S, "expected register");
  return MatchOperand_ParseFail;
}

unsigned FirstReg;
OperandMatchResultTy Res = tryParseScalarRegister(FirstReg);
if (Res != MatchOperand_Success)
  return MatchOperand_ParseFail;

const MCRegisterClass &WRegClass =
    AArch64MCRegisterClasses[AArch64::GPR32RegClassID];
const MCRegisterClass &XRegClass =
    AArch64MCRegisterClasses[AArch64::GPR64RegClassID];

bool isXReg = XRegClass.contains(FirstReg),
     isWReg = WRegClass.contains(FirstReg);
if (!isXReg && !isWReg) {
  Error(S, "expected first even register of a "
           "consecutive same-size even/odd register pair");
  return MatchOperand_ParseFail;
}

const MCRegisterInfo *RI = getContext().getRegisterInfo();
unsigned FirstEncoding = RI->getEncodingValue(FirstReg);

if (FirstEncoding & 0x1) {
  Error(S, "expected first even register of a "
           "consecutive same-size even/odd register pair");
  return MatchOperand_ParseFail;
}

if (getTok().isNot(AsmToken::Comma)) {
  Error(getLoc(), "expected comma");
  return MatchOperand_ParseFail;
}
// Eat the comma
Lex();

SMLoc E = getLoc();
unsigned SecondReg;
Res = tryParseScalarRegister(SecondReg);
if (Res != MatchOperand_Success)
  return MatchOperand_ParseFail;

if (RI->getEncodingValue(SecondReg) != FirstEncoding + 1 ||
    (isXReg && !XRegClass.contains(SecondReg)) ||
    (isWReg && !WRegClass.contains(SecondReg))) {
  Error(E,"expected second odd register of a "
           "consecutive same-size even/odd register pair");
  return MatchOperand_ParseFail;
}

unsigned Pair = 0;
if (isXReg) {
  Pair = RI->getMatchingSuperReg(FirstReg, AArch64::sube64,
         &AArch64MCRegisterClasses[AArch64::XSeqPairsClassRegClassID]);
} else {
  Pair = RI->getMatchingSuperReg(FirstReg, AArch64::sube32,
         &AArch64MCRegisterClasses[AArch64::WSeqPairsClassRegClassID]);
}

Operands.push_back(AArch64Operand::CreateReg(Pair, RegKind::Scalar, S,
    getLoc(), getContext()));

return MatchOperand_Success;
6969}

6971template <bool ParseShiftExtend, bool ParseSuffix>
6972OperandMatchResultTy
6973AArch64AsmParser::tryParseSVEDataVector(OperandVector &Operands) {
const SMLoc S = getLoc();
// Check for a SVE vector register specifier first.
unsigned RegNum;
StringRef Kind;

OperandMatchResultTy Res =
    tryParseVectorRegister(RegNum, Kind, RegKind::SVEDataVector);

if (Res != MatchOperand_Success)
  return Res;

if (ParseSuffix && Kind.empty())
  return MatchOperand_NoMatch;

const auto &KindRes = parseVectorKind(Kind, RegKind::SVEDataVector);
if (!KindRes)
  return MatchOperand_NoMatch;

unsigned ElementWidth = KindRes->second;

// No shift/extend is the default.
if (!ParseShiftExtend || getTok().isNot(AsmToken::Comma)) {
  Operands.push_back(AArch64Operand::CreateVectorReg(
      RegNum, RegKind::SVEDataVector, ElementWidth, S, S, getContext()));

  OperandMatchResultTy Res = tryParseVectorIndex(Operands);
  if (Res == MatchOperand_ParseFail)
    return MatchOperand_ParseFail;
  return MatchOperand_Success;
}

// Eat the comma
Lex();

// Match the shift
SmallVector<std::unique_ptr<MCParsedAsmOperand>, 1> ExtOpnd;
Res = tryParseOptionalShiftExtend(ExtOpnd);
if (Res != MatchOperand_Success)
  return Res;

auto Ext = static_cast<AArch64Operand *>(ExtOpnd.back().get());
Operands.push_back(AArch64Operand::CreateVectorReg(
    RegNum, RegKind::SVEDataVector, ElementWidth, S, Ext->getEndLoc(),
    getContext(), Ext->getShiftExtendType(), Ext->getShiftExtendAmount(),
    Ext->hasShiftExtendAmount()));

return MatchOperand_Success;
7021}

7023OperandMatchResultTy
7024AArch64AsmParser::tryParseSVEPattern(OperandVector &Operands) {
MCAsmParser &Parser = getParser();

SMLoc SS = getLoc();
const AsmToken &TokE = getTok();
bool IsHash = TokE.is(AsmToken::Hash);

if (!IsHash && TokE.isNot(AsmToken::Identifier))
  return MatchOperand_NoMatch;

int64_t Pattern;
if (IsHash) {
  Lex(); // Eat hash

  // Parse the immediate operand.
  const MCExpr *ImmVal;
  SS = getLoc();
  if (Parser.parseExpression(ImmVal))
    return MatchOperand_ParseFail;

  auto *MCE = dyn_cast<MCConstantExpr>(ImmVal);
  if (!MCE)
    return MatchOperand_ParseFail;

  Pattern = MCE->getValue();
} else {
  // Parse the pattern
  auto Pat = AArch64SVEPredPattern::lookupSVEPREDPATByName(TokE.getString());
  if (!Pat)
    return MatchOperand_NoMatch;

  Lex();
  Pattern = Pat->Encoding;
  assert(Pattern >= 0 && Pattern < 32)(static_cast <bool> (Pattern >= 0 && Pattern
 < 32) ? void (0) : __assert_fail ("Pattern >= 0 && Pattern < 32"
, "llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp", 7057
, __extension__ __PRETTY_FUNCTION__));
}

Operands.push_back(
    AArch64Operand::CreateImm(MCConstantExpr::create(Pattern, getContext()),
                              SS, getLoc(), getContext()));

return MatchOperand_Success;
7065}

7067OperandMatchResultTy
7068AArch64AsmParser::tryParseGPR64x8(OperandVector &Operands) {
SMLoc SS = getLoc();

unsigned XReg;
if (tryParseScalarRegister(XReg) != MatchOperand_Success)
  return MatchOperand_NoMatch;

MCContext &ctx = getContext();
const MCRegisterInfo *RI = ctx.getRegisterInfo();
int X8Reg = RI->getMatchingSuperReg(
    XReg, AArch64::x8sub_0,
    &AArch64MCRegisterClasses[AArch64::GPR64x8ClassRegClassID]);
if (!X8Reg) {
  Error(SS, "expected an even-numbered x-register in the range [x0,x22]");
  return MatchOperand_ParseFail;
}

Operands.push_back(
    AArch64Operand::CreateReg(X8Reg, RegKind::Scalar, SS, getLoc(), ctx));
return MatchOperand_Success;
7088}