/build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/CodeGen/MIRParser/MIParser.cpp

Bug Summary

File:	build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/CodeGen/MIRParser/MIParser.cpp
Warning:	line 2082, column 15 The left operand of '>=' is a garbage value
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 MIParser.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/CodeGen/MIRParser -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/lib/CodeGen/MIRParser -I include -I /build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/llvm/include -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-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/CodeGen/MIRParser/MIParser.cpp
1//===- MIParser.cpp - Machine instructions parser implementation ----------===//
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//===----------------------------------------------------------------------===//
8//
9// This file implements the parsing of machine instructions.
10//
11//===----------------------------------------------------------------------===//

13#include "llvm/CodeGen/MIRParser/MIParser.h"
14#include "MILexer.h"
15#include "llvm/ADT/APInt.h"
16#include "llvm/ADT/APSInt.h"
17#include "llvm/ADT/ArrayRef.h"
18#include "llvm/ADT/DenseMap.h"
19#include "llvm/ADT/None.h"
20#include "llvm/ADT/Optional.h"
21#include "llvm/ADT/SmallVector.h"
22#include "llvm/ADT/StringMap.h"
23#include "llvm/ADT/StringRef.h"
24#include "llvm/ADT/StringSwitch.h"
25#include "llvm/ADT/Twine.h"
26#include "llvm/Analysis/MemoryLocation.h"
27#include "llvm/AsmParser/Parser.h"
28#include "llvm/AsmParser/SlotMapping.h"
29#include "llvm/CodeGen/MIRFormatter.h"
30#include "llvm/CodeGen/MIRPrinter.h"
31#include "llvm/CodeGen/MachineBasicBlock.h"
32#include "llvm/CodeGen/MachineFrameInfo.h"
33#include "llvm/CodeGen/MachineFunction.h"
34#include "llvm/CodeGen/MachineInstr.h"
35#include "llvm/CodeGen/MachineInstrBuilder.h"
36#include "llvm/CodeGen/MachineMemOperand.h"
37#include "llvm/CodeGen/MachineOperand.h"
38#include "llvm/CodeGen/MachineRegisterInfo.h"
39#include "llvm/CodeGen/RegisterBank.h"
40#include "llvm/CodeGen/RegisterBankInfo.h"
41#include "llvm/CodeGen/TargetInstrInfo.h"
42#include "llvm/CodeGen/TargetRegisterInfo.h"
43#include "llvm/CodeGen/TargetSubtargetInfo.h"
44#include "llvm/IR/BasicBlock.h"
45#include "llvm/IR/Constants.h"
46#include "llvm/IR/DataLayout.h"
47#include "llvm/IR/DebugInfoMetadata.h"
48#include "llvm/IR/DebugLoc.h"
49#include "llvm/IR/Function.h"
50#include "llvm/IR/InstrTypes.h"
51#include "llvm/IR/Instructions.h"
52#include "llvm/IR/Intrinsics.h"
53#include "llvm/IR/Metadata.h"
54#include "llvm/IR/Module.h"
55#include "llvm/IR/ModuleSlotTracker.h"
56#include "llvm/IR/Type.h"
57#include "llvm/IR/Value.h"
58#include "llvm/IR/ValueSymbolTable.h"
59#include "llvm/MC/LaneBitmask.h"
60#include "llvm/MC/MCContext.h"
61#include "llvm/MC/MCDwarf.h"
62#include "llvm/MC/MCInstrDesc.h"
63#include "llvm/Support/AtomicOrdering.h"
64#include "llvm/Support/BranchProbability.h"
65#include "llvm/Support/Casting.h"
66#include "llvm/Support/ErrorHandling.h"
67#include "llvm/Support/LowLevelTypeImpl.h"
68#include "llvm/Support/MemoryBuffer.h"
69#include "llvm/Support/SMLoc.h"
70#include "llvm/Support/SourceMgr.h"
71#include "llvm/Target/TargetIntrinsicInfo.h"
72#include "llvm/Target/TargetMachine.h"
73#include <cassert>
74#include <cctype>
75#include <cstddef>
76#include <cstdint>
77#include <limits>
78#include <string>
79#include <utility>

81using namespace llvm;

83void PerTargetMIParsingState::setTarget(
const TargetSubtargetInfo &NewSubtarget) {

// If the subtarget changed, over conservatively assume everything is invalid.
if (&Subtarget == &NewSubtarget)
  return;

Names2InstrOpCodes.clear();
Names2Regs.clear();
Names2RegMasks.clear();
Names2SubRegIndices.clear();
Names2TargetIndices.clear();
Names2DirectTargetFlags.clear();
Names2BitmaskTargetFlags.clear();
Names2MMOTargetFlags.clear();

initNames2RegClasses();
initNames2RegBanks();
101}

103void PerTargetMIParsingState::initNames2Regs() {
if (!Names2Regs.empty())
  return;

// The '%noreg' register is the register 0.
Names2Regs.insert(std::make_pair("noreg", 0));
const auto *TRI = Subtarget.getRegisterInfo();
assert(TRI && "Expected target register info")(static_cast <bool> (TRI && "Expected target register info"
) ? void (0) : __assert_fail ("TRI && \"Expected target register info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 110, __extension__
 __PRETTY_FUNCTION__));

for (unsigned I = 0, E = TRI->getNumRegs(); I < E; ++I) {
  bool WasInserted =
      Names2Regs.insert(std::make_pair(StringRef(TRI->getName(I)).lower(), I))
          .second;
  (void)WasInserted;
  assert(WasInserted && "Expected registers to be unique case-insensitively")(static_cast <bool> (WasInserted && "Expected registers to be unique case-insensitively"
) ? void (0) : __assert_fail ("WasInserted && \"Expected registers to be unique case-insensitively\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 117, __extension__
 __PRETTY_FUNCTION__));
}
119}

121bool PerTargetMIParsingState::getRegisterByName(StringRef RegName,
                                              Register &Reg) {
initNames2Regs();
auto RegInfo = Names2Regs.find(RegName);
if (RegInfo == Names2Regs.end())
  return true;
Reg = RegInfo->getValue();
return false;
129}

131void PerTargetMIParsingState::initNames2InstrOpCodes() {
if (!Names2InstrOpCodes.empty())
  return;
const auto *TII = Subtarget.getInstrInfo();
assert(TII && "Expected target instruction info")(static_cast <bool> (TII && "Expected target instruction info"
) ? void (0) : __assert_fail ("TII && \"Expected target instruction info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 135, __extension__
 __PRETTY_FUNCTION__));
for (unsigned I = 0, E = TII->getNumOpcodes(); I < E; ++I)
  Names2InstrOpCodes.insert(std::make_pair(StringRef(TII->getName(I)), I));
138}

140bool PerTargetMIParsingState::parseInstrName(StringRef InstrName,
                                           unsigned &OpCode) {
initNames2InstrOpCodes();
auto InstrInfo = Names2InstrOpCodes.find(InstrName);
if (InstrInfo == Names2InstrOpCodes.end())
  return true;
OpCode = InstrInfo->getValue();
return false;
148}

150void PerTargetMIParsingState::initNames2RegMasks() {
if (!Names2RegMasks.empty())
  return;
const auto *TRI = Subtarget.getRegisterInfo();
assert(TRI && "Expected target register info")(static_cast <bool> (TRI && "Expected target register info"
) ? void (0) : __assert_fail ("TRI && \"Expected target register info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 154, __extension__
 __PRETTY_FUNCTION__));
ArrayRef<const uint32_t *> RegMasks = TRI->getRegMasks();
ArrayRef<const char *> RegMaskNames = TRI->getRegMaskNames();
assert(RegMasks.size() == RegMaskNames.size())(static_cast <bool> (RegMasks.size() == RegMaskNames.size
()) ? void (0) : __assert_fail ("RegMasks.size() == RegMaskNames.size()"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 157, __extension__
 __PRETTY_FUNCTION__));
for (size_t I = 0, E = RegMasks.size(); I < E; ++I)
  Names2RegMasks.insert(
      std::make_pair(StringRef(RegMaskNames[I]).lower(), RegMasks[I]));
161}

163const uint32_t *PerTargetMIParsingState::getRegMask(StringRef Identifier) {
initNames2RegMasks();
auto RegMaskInfo = Names2RegMasks.find(Identifier);
if (RegMaskInfo == Names2RegMasks.end())
  return nullptr;
return RegMaskInfo->getValue();
169}

171void PerTargetMIParsingState::initNames2SubRegIndices() {
if (!Names2SubRegIndices.empty())
  return;
const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo();
for (unsigned I = 1, E = TRI->getNumSubRegIndices(); I < E; ++I)
  Names2SubRegIndices.insert(
      std::make_pair(TRI->getSubRegIndexName(I), I));
178}

180unsigned PerTargetMIParsingState::getSubRegIndex(StringRef Name) {
initNames2SubRegIndices();
auto SubRegInfo = Names2SubRegIndices.find(Name);
if (SubRegInfo == Names2SubRegIndices.end())
  return 0;
return SubRegInfo->getValue();
186}

188void PerTargetMIParsingState::initNames2TargetIndices() {
if (!Names2TargetIndices.empty())
  return;
const auto *TII = Subtarget.getInstrInfo();
assert(TII && "Expected target instruction info")(static_cast <bool> (TII && "Expected target instruction info"
) ? void (0) : __assert_fail ("TII && \"Expected target instruction info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 192, __extension__
 __PRETTY_FUNCTION__));
auto Indices = TII->getSerializableTargetIndices();
for (const auto &I : Indices)
  Names2TargetIndices.insert(std::make_pair(StringRef(I.second), I.first));
196}

198bool PerTargetMIParsingState::getTargetIndex(StringRef Name, int &Index) {
initNames2TargetIndices();
auto IndexInfo = Names2TargetIndices.find(Name);
if (IndexInfo == Names2TargetIndices.end())
  return true;
Index = IndexInfo->second;
return false;
205}

207void PerTargetMIParsingState::initNames2DirectTargetFlags() {
if (!Names2DirectTargetFlags.empty())
  return;

const auto *TII = Subtarget.getInstrInfo();
assert(TII && "Expected target instruction info")(static_cast <bool> (TII && "Expected target instruction info"
) ? void (0) : __assert_fail ("TII && \"Expected target instruction info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 212, __extension__
 __PRETTY_FUNCTION__));
auto Flags = TII->getSerializableDirectMachineOperandTargetFlags();
for (const auto &I : Flags)
  Names2DirectTargetFlags.insert(
      std::make_pair(StringRef(I.second), I.first));
217}

219bool PerTargetMIParsingState::getDirectTargetFlag(StringRef Name,
                                                unsigned &Flag) {
initNames2DirectTargetFlags();
auto FlagInfo = Names2DirectTargetFlags.find(Name);
if (FlagInfo == Names2DirectTargetFlags.end())
  return true;
Flag = FlagInfo->second;
return false;
227}

229void PerTargetMIParsingState::initNames2BitmaskTargetFlags() {
if (!Names2BitmaskTargetFlags.empty())
  return;

const auto *TII = Subtarget.getInstrInfo();
assert(TII && "Expected target instruction info")(static_cast <bool> (TII && "Expected target instruction info"
) ? void (0) : __assert_fail ("TII && \"Expected target instruction info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 234, __extension__
 __PRETTY_FUNCTION__));
auto Flags = TII->getSerializableBitmaskMachineOperandTargetFlags();
for (const auto &I : Flags)
  Names2BitmaskTargetFlags.insert(
      std::make_pair(StringRef(I.second), I.first));
239}

241bool PerTargetMIParsingState::getBitmaskTargetFlag(StringRef Name,
                                                 unsigned &Flag) {
initNames2BitmaskTargetFlags();
auto FlagInfo = Names2BitmaskTargetFlags.find(Name);
if (FlagInfo == Names2BitmaskTargetFlags.end())
  return true;
Flag = FlagInfo->second;
return false;
249}

251void PerTargetMIParsingState::initNames2MMOTargetFlags() {
if (!Names2MMOTargetFlags.empty())
  return;

const auto *TII = Subtarget.getInstrInfo();
assert(TII && "Expected target instruction info")(static_cast <bool> (TII && "Expected target instruction info"
) ? void (0) : __assert_fail ("TII && \"Expected target instruction info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 256, __extension__
 __PRETTY_FUNCTION__));
auto Flags = TII->getSerializableMachineMemOperandTargetFlags();
for (const auto &I : Flags)
  Names2MMOTargetFlags.insert(std::make_pair(StringRef(I.second), I.first));
260}

262bool PerTargetMIParsingState::getMMOTargetFlag(StringRef Name,
                                             MachineMemOperand::Flags &Flag) {
initNames2MMOTargetFlags();
auto FlagInfo = Names2MMOTargetFlags.find(Name);
if (FlagInfo == Names2MMOTargetFlags.end())
  return true;
Flag = FlagInfo->second;
return false;
270}

272void PerTargetMIParsingState::initNames2RegClasses() {
if (!Names2RegClasses.empty())
  return;

const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo();
for (unsigned I = 0, E = TRI->getNumRegClasses(); I < E; ++I) {
  const auto *RC = TRI->getRegClass(I);
  Names2RegClasses.insert(
      std::make_pair(StringRef(TRI->getRegClassName(RC)).lower(), RC));
}
282}

284void PerTargetMIParsingState::initNames2RegBanks() {
if (!Names2RegBanks.empty())
  return;

const RegisterBankInfo *RBI = Subtarget.getRegBankInfo();
// If the target does not support GlobalISel, we may not have a
// register bank info.
if (!RBI)
  return;

for (unsigned I = 0, E = RBI->getNumRegBanks(); I < E; ++I) {
  const auto &RegBank = RBI->getRegBank(I);
  Names2RegBanks.insert(
      std::make_pair(StringRef(RegBank.getName()).lower(), &RegBank));
}
299}

301const TargetRegisterClass *
302PerTargetMIParsingState::getRegClass(StringRef Name) {
auto RegClassInfo = Names2RegClasses.find(Name);
if (RegClassInfo == Names2RegClasses.end())
  return nullptr;
return RegClassInfo->getValue();
307}

309const RegisterBank *PerTargetMIParsingState::getRegBank(StringRef Name) {
auto RegBankInfo = Names2RegBanks.find(Name);
if (RegBankInfo == Names2RegBanks.end())
  return nullptr;
return RegBankInfo->getValue();
314}

316PerFunctionMIParsingState::PerFunctionMIParsingState(MachineFunction &MF,
  SourceMgr &SM, const SlotMapping &IRSlots, PerTargetMIParsingState &T)
: MF(MF), SM(&SM), IRSlots(IRSlots), Target(T) {
319}

321VRegInfo &PerFunctionMIParsingState::getVRegInfo(Register Num) {
auto I = VRegInfos.insert(std::make_pair(Num, nullptr));
if (I.second) {
  MachineRegisterInfo &MRI = MF.getRegInfo();
  VRegInfo *Info = new (Allocator) VRegInfo;
  Info->VReg = MRI.createIncompleteVirtualRegister();
  I.first->second = Info;
}
return *I.first->second;
330}

332VRegInfo &PerFunctionMIParsingState::getVRegInfoNamed(StringRef RegName) {
assert(RegName != "" && "Expected named reg.")(static_cast <bool> (RegName != "" && "Expected named reg."
) ? void (0) : __assert_fail ("RegName != \"\" && \"Expected named reg.\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 333, __extension__
 __PRETTY_FUNCTION__));

auto I = VRegInfosNamed.insert(std::make_pair(RegName.str(), nullptr));
if (I.second) {
  VRegInfo *Info = new (Allocator) VRegInfo;
  Info->VReg = MF.getRegInfo().createIncompleteVirtualRegister(RegName);
  I.first->second = Info;
}
return *I.first->second;
342}

344static void mapValueToSlot(const Value *V, ModuleSlotTracker &MST,
                         DenseMap<unsigned, const Value *> &Slots2Values) {
int Slot = MST.getLocalSlot(V);
if (Slot == -1)
  return;
Slots2Values.insert(std::make_pair(unsigned(Slot), V));
350}

352/// Creates the mapping from slot numbers to function's unnamed IR values.
353static void initSlots2Values(const Function &F,
                           DenseMap<unsigned, const Value *> &Slots2Values) {
ModuleSlotTracker MST(F.getParent(), /*ShouldInitializeAllMetadata=*/false);
MST.incorporateFunction(F);
for (const auto &Arg : F.args())
  mapValueToSlot(&Arg, MST, Slots2Values);
for (const auto &BB : F) {
  mapValueToSlot(&BB, MST, Slots2Values);
  for (const auto &I : BB)
    mapValueToSlot(&I, MST, Slots2Values);
}
364}

366const Value* PerFunctionMIParsingState::getIRValue(unsigned Slot) {
if (Slots2Values.empty())
  initSlots2Values(MF.getFunction(), Slots2Values);
return Slots2Values.lookup(Slot);
370}

372namespace {

374/// A wrapper struct around the 'MachineOperand' struct that includes a source
375/// range and other attributes.
376struct ParsedMachineOperand {
MachineOperand Operand;
StringRef::iterator Begin;
StringRef::iterator End;
Optional<unsigned> TiedDefIdx;

ParsedMachineOperand(const MachineOperand &Operand, StringRef::iterator Begin,
                     StringRef::iterator End, Optional<unsigned> &TiedDefIdx)
    : Operand(Operand), Begin(Begin), End(End), TiedDefIdx(TiedDefIdx) {
  if (TiedDefIdx)
    assert(Operand.isReg() && Operand.isUse() &&(static_cast <bool> (Operand.isReg() && Operand
.isUse() && "Only used register operands can be tied"
) ? void (0) : __assert_fail ("Operand.isReg() && Operand.isUse() && \"Only used register operands can be tied\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 387, __extension__
 __PRETTY_FUNCTION__))
           "Only used register operands can be tied")(static_cast <bool> (Operand.isReg() && Operand
.isUse() && "Only used register operands can be tied"
) ? void (0) : __assert_fail ("Operand.isReg() && Operand.isUse() && \"Only used register operands can be tied\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 387, __extension__
 __PRETTY_FUNCTION__));
}
389};

391class MIParser {
MachineFunction &MF;
SMDiagnostic &Error;
StringRef Source, CurrentSource;
SMRange SourceRange;
MIToken Token;
PerFunctionMIParsingState &PFS;
/// Maps from slot numbers to function's unnamed basic blocks.
DenseMap<unsigned, const BasicBlock *> Slots2BasicBlocks;

401public:
MIParser(PerFunctionMIParsingState &PFS, SMDiagnostic &Error,
         StringRef Source);
MIParser(PerFunctionMIParsingState &PFS, SMDiagnostic &Error,
         StringRef Source, SMRange SourceRange);

/// \p SkipChar gives the number of characters to skip before looking
/// for the next token.
void lex(unsigned SkipChar = 0);

/// Report an error at the current location with the given message.
///
/// This function always return true.
bool error(const Twine &Msg);

/// Report an error at the given location with the given message.
///
/// This function always return true.
bool error(StringRef::iterator Loc, const Twine &Msg);

bool
parseBasicBlockDefinitions(DenseMap<unsigned, MachineBasicBlock *> &MBBSlots);
bool parseBasicBlocks();
bool parse(MachineInstr *&MI);
bool parseStandaloneMBB(MachineBasicBlock *&MBB);
bool parseStandaloneNamedRegister(Register &Reg);
bool parseStandaloneVirtualRegister(VRegInfo *&Info);
bool parseStandaloneRegister(Register &Reg);
bool parseStandaloneStackObject(int &FI);
bool parseStandaloneMDNode(MDNode *&Node);
bool parseMachineMetadata();
bool parseMDTuple(MDNode *&MD, bool IsDistinct);
bool parseMDNodeVector(SmallVectorImpl<Metadata *> &Elts);
bool parseMetadata(Metadata *&MD);

bool
parseBasicBlockDefinition(DenseMap<unsigned, MachineBasicBlock *> &MBBSlots);
bool parseBasicBlock(MachineBasicBlock &MBB,
                     MachineBasicBlock *&AddFalthroughFrom);
bool parseBasicBlockLiveins(MachineBasicBlock &MBB);
bool parseBasicBlockSuccessors(MachineBasicBlock &MBB);

bool parseNamedRegister(Register &Reg);
bool parseVirtualRegister(VRegInfo *&Info);
bool parseNamedVirtualRegister(VRegInfo *&Info);
bool parseRegister(Register &Reg, VRegInfo *&VRegInfo);
bool parseRegisterFlag(unsigned &Flags);
bool parseRegisterClassOrBank(VRegInfo &RegInfo);
bool parseSubRegisterIndex(unsigned &SubReg);
bool parseRegisterTiedDefIndex(unsigned &TiedDefIdx);
bool parseRegisterOperand(MachineOperand &Dest,
                          Optional<unsigned> &TiedDefIdx, bool IsDef = false);
bool parseImmediateOperand(MachineOperand &Dest);
bool parseIRConstant(StringRef::iterator Loc, StringRef StringValue,
                     const Constant *&C);
bool parseIRConstant(StringRef::iterator Loc, const Constant *&C);
bool parseLowLevelType(StringRef::iterator Loc, LLT &Ty);
bool parseTypedImmediateOperand(MachineOperand &Dest);
bool parseFPImmediateOperand(MachineOperand &Dest);
bool parseMBBReference(MachineBasicBlock *&MBB);
bool parseMBBOperand(MachineOperand &Dest);
bool parseStackFrameIndex(int &FI);
bool parseStackObjectOperand(MachineOperand &Dest);
bool parseFixedStackFrameIndex(int &FI);
bool parseFixedStackObjectOperand(MachineOperand &Dest);
bool parseGlobalValue(GlobalValue *&GV);
bool parseGlobalAddressOperand(MachineOperand &Dest);
bool parseConstantPoolIndexOperand(MachineOperand &Dest);
bool parseSubRegisterIndexOperand(MachineOperand &Dest);
bool parseJumpTableIndexOperand(MachineOperand &Dest);
bool parseExternalSymbolOperand(MachineOperand &Dest);
bool parseMCSymbolOperand(MachineOperand &Dest);
bool parseMDNode(MDNode *&Node);
bool parseDIExpression(MDNode *&Expr);
bool parseDILocation(MDNode *&Expr);
bool parseMetadataOperand(MachineOperand &Dest);
bool parseCFIOffset(int &Offset);
bool parseCFIRegister(Register &Reg);
bool parseCFIAddressSpace(unsigned &AddressSpace);
bool parseCFIEscapeValues(std::string& Values);
bool parseCFIOperand(MachineOperand &Dest);
bool parseIRBlock(BasicBlock *&BB, const Function &F);
bool parseBlockAddressOperand(MachineOperand &Dest);
bool parseIntrinsicOperand(MachineOperand &Dest);
bool parsePredicateOperand(MachineOperand &Dest);
bool parseShuffleMaskOperand(MachineOperand &Dest);
bool parseTargetIndexOperand(MachineOperand &Dest);
bool parseCustomRegisterMaskOperand(MachineOperand &Dest);
bool parseLiveoutRegisterMaskOperand(MachineOperand &Dest);
bool parseMachineOperand(const unsigned OpCode, const unsigned OpIdx,
                         MachineOperand &Dest,
                         Optional<unsigned> &TiedDefIdx);
bool parseMachineOperandAndTargetFlags(const unsigned OpCode,
                                       const unsigned OpIdx,
                                       MachineOperand &Dest,
                                       Optional<unsigned> &TiedDefIdx);
bool parseOffset(int64_t &Offset);
bool parseAlignment(uint64_t &Alignment);
bool parseAddrspace(unsigned &Addrspace);
bool parseSectionID(Optional<MBBSectionID> &SID);
bool parseOperandsOffset(MachineOperand &Op);
bool parseIRValue(const Value *&V);
bool parseMemoryOperandFlag(MachineMemOperand::Flags &Flags);
bool parseMemoryPseudoSourceValue(const PseudoSourceValue *&PSV);
bool parseMachinePointerInfo(MachinePointerInfo &Dest);
bool parseOptionalScope(LLVMContext &Context, SyncScope::ID &SSID);
bool parseOptionalAtomicOrdering(AtomicOrdering &Order);
bool parseMachineMemoryOperand(MachineMemOperand *&Dest);
bool parsePreOrPostInstrSymbol(MCSymbol *&Symbol);
bool parseHeapAllocMarker(MDNode *&Node);

bool parseTargetImmMnemonic(const unsigned OpCode, const unsigned OpIdx,
                            MachineOperand &Dest, const MIRFormatter &MF);

515private:
/// Convert the integer literal in the current token into an unsigned integer.
///
/// Return true if an error occurred.
bool getUnsigned(unsigned &Result);

/// Convert the integer literal in the current token into an uint64.
///
/// Return true if an error occurred.
bool getUint64(uint64_t &Result);

/// Convert the hexadecimal literal in the current token into an unsigned
///  APInt with a minimum bitwidth required to represent the value.
///
/// Return true if the literal does not represent an integer value.
bool getHexUint(APInt &Result);

/// If the current token is of the given kind, consume it and return false.
/// Otherwise report an error and return true.
bool expectAndConsume(MIToken::TokenKind TokenKind);

/// If the current token is of the given kind, consume it and return true.
/// Otherwise return false.
bool consumeIfPresent(MIToken::TokenKind TokenKind);

bool parseInstruction(unsigned &OpCode, unsigned &Flags);

bool assignRegisterTies(MachineInstr &MI,
                        ArrayRef<ParsedMachineOperand> Operands);

bool verifyImplicitOperands(ArrayRef<ParsedMachineOperand> Operands,
                            const MCInstrDesc &MCID);

const BasicBlock *getIRBlock(unsigned Slot);
const BasicBlock *getIRBlock(unsigned Slot, const Function &F);

/// Get or create an MCSymbol for a given name.
MCSymbol *getOrCreateMCSymbol(StringRef Name);

/// parseStringConstant
///   ::= StringConstant
bool parseStringConstant(std::string &Result);

/// Map the location in the MI string to the corresponding location specified
/// in `SourceRange`.
SMLoc mapSMLoc(StringRef::iterator Loc);
561};

563} // end anonymous namespace

565MIParser::MIParser(PerFunctionMIParsingState &PFS, SMDiagnostic &Error,
                 StringRef Source)
  : MF(PFS.MF), Error(Error), Source(Source), CurrentSource(Source), PFS(PFS)
568{}

570MIParser::MIParser(PerFunctionMIParsingState &PFS, SMDiagnostic &Error,
                 StringRef Source, SMRange SourceRange)
  : MF(PFS.MF), Error(Error), Source(Source), CurrentSource(Source),
    SourceRange(SourceRange), PFS(PFS) {}

575void MIParser::lex(unsigned SkipChar) {
CurrentSource = lexMIToken(
    CurrentSource.slice(SkipChar, StringRef::npos), Token,
    [this](StringRef::iterator Loc, const Twine &Msg) { error(Loc, Msg); });
579}

581bool MIParser::error(const Twine &Msg) { return error(Token.location(), Msg); }

583bool MIParser::error(StringRef::iterator Loc, const Twine &Msg) {
const SourceMgr &SM = *PFS.SM;
assert(Loc >= Source.data() && Loc <= (Source.data() + Source.size()))(static_cast <bool> (Loc >= Source.data() &&
 Loc <= (Source.data() + Source.size())) ? void (0) : __assert_fail
 ("Loc >= Source.data() && Loc <= (Source.data() + Source.size())"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 585, __extension__
 __PRETTY_FUNCTION__));
const MemoryBuffer &Buffer = *SM.getMemoryBuffer(SM.getMainFileID());
if (Loc >= Buffer.getBufferStart() && Loc <= Buffer.getBufferEnd()) {
  // Create an ordinary diagnostic when the source manager's buffer is the
  // source string.
  Error = SM.GetMessage(SMLoc::getFromPointer(Loc), SourceMgr::DK_Error, Msg);
  return true;
}
// Create a diagnostic for a YAML string literal.
Error = SMDiagnostic(SM, SMLoc(), Buffer.getBufferIdentifier(), 1,
                     Loc - Source.data(), SourceMgr::DK_Error, Msg.str(),
                     Source, None, None);
return true;
598}

600SMLoc MIParser::mapSMLoc(StringRef::iterator Loc) {
assert(SourceRange.isValid() && "Invalid source range")(static_cast <bool> (SourceRange.isValid() && "Invalid source range"
) ? void (0) : __assert_fail ("SourceRange.isValid() && \"Invalid source range\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 601, __extension__
 __PRETTY_FUNCTION__));
assert(Loc >= Source.data() && Loc <= (Source.data() + Source.size()))(static_cast <bool> (Loc >= Source.data() &&
 Loc <= (Source.data() + Source.size())) ? void (0) : __assert_fail
 ("Loc >= Source.data() && Loc <= (Source.data() + Source.size())"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 602, __extension__
 __PRETTY_FUNCTION__));
return SMLoc::getFromPointer(SourceRange.Start.getPointer() +
                             (Loc - Source.data()));
605}

607typedef function_ref<bool(StringRef::iterator Loc, const Twine &)>
  ErrorCallbackType;

610static const char *toString(MIToken::TokenKind TokenKind) {
switch (TokenKind) {
case MIToken::comma:
  return "','";
case MIToken::equal:
  return "'='";
case MIToken::colon:
  return "':'";
case MIToken::lparen:
  return "'('";
case MIToken::rparen:
  return "')'";
default:
  return "<unknown token>";
}
625}

627bool MIParser::expectAndConsume(MIToken::TokenKind TokenKind) {
if (Token.isNot(TokenKind))
  return error(Twine("expected ") + toString(TokenKind));
lex();
return false;
632}

634bool MIParser::consumeIfPresent(MIToken::TokenKind TokenKind) {
if (Token.isNot(TokenKind))
  return false;
lex();
return true;
639}

641// Parse Machine Basic Block Section ID.
642bool MIParser::parseSectionID(Optional<MBBSectionID> &SID) {
assert(Token.is(MIToken::kw_bbsections))(static_cast <bool> (Token.is(MIToken::kw_bbsections)) ?
 void (0) : __assert_fail ("Token.is(MIToken::kw_bbsections)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 643, __extension__
 __PRETTY_FUNCTION__));
lex();
if (Token.is(MIToken::IntegerLiteral)) {
  unsigned Value = 0;
  if (getUnsigned(Value))
    return error("Unknown Section ID");
  SID = MBBSectionID{Value};
} else {
  const StringRef &S = Token.stringValue();
  if (S == "Exception")
    SID = MBBSectionID::ExceptionSectionID;
  else if (S == "Cold")
    SID = MBBSectionID::ColdSectionID;
  else
    return error("Unknown Section ID");
}
lex();
return false;
661}

663bool MIParser::parseBasicBlockDefinition(
  DenseMap<unsigned, MachineBasicBlock *> &MBBSlots) {
assert(Token.is(MIToken::MachineBasicBlockLabel))(static_cast <bool> (Token.is(MIToken::MachineBasicBlockLabel
)) ? void (0) : __assert_fail ("Token.is(MIToken::MachineBasicBlockLabel)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 665, __extension__
 __PRETTY_FUNCTION__));
unsigned ID = 0;
if (getUnsigned(ID))
  return true;
auto Loc = Token.location();
auto Name = Token.stringValue();
lex();
bool HasAddressTaken = false;
bool IsLandingPad = false;
bool IsInlineAsmBrIndirectTarget = false;
bool IsEHFuncletEntry = false;
Optional<MBBSectionID> SectionID;
uint64_t Alignment = 0;
BasicBlock *BB = nullptr;
if (consumeIfPresent(MIToken::lparen)) {
  do {
    // TODO: Report an error when multiple same attributes are specified.
    switch (Token.kind()) {
    case MIToken::kw_address_taken:
      HasAddressTaken = true;
      lex();
      break;
    case MIToken::kw_landing_pad:
      IsLandingPad = true;
      lex();
      break;
    case MIToken::kw_inlineasm_br_indirect_target:
      IsInlineAsmBrIndirectTarget = true;
      lex();
      break;
    case MIToken::kw_ehfunclet_entry:
      IsEHFuncletEntry = true;
      lex();
      break;
    case MIToken::kw_align:
      if (parseAlignment(Alignment))
        return true;
      break;
    case MIToken::IRBlock:
      // TODO: Report an error when both name and ir block are specified.
      if (parseIRBlock(BB, MF.getFunction()))
        return true;
      lex();
      break;
    case MIToken::kw_bbsections:
      if (parseSectionID(SectionID))
        return true;
      break;
    default:
      break;
    }
  } while (consumeIfPresent(MIToken::comma));
  if (expectAndConsume(MIToken::rparen))
    return true;
}
if (expectAndConsume(MIToken::colon))
  return true;

if (!Name.empty()) {
  BB = dyn_cast_or_null<BasicBlock>(
      MF.getFunction().getValueSymbolTable()->lookup(Name));
  if (!BB)
    return error(Loc, Twine("basic block '") + Name +
                          "' is not defined in the function '" +
                          MF.getName() + "'");
}
auto *MBB = MF.CreateMachineBasicBlock(BB);
MF.insert(MF.end(), MBB);
bool WasInserted = MBBSlots.insert(std::make_pair(ID, MBB)).second;
if (!WasInserted)
  return error(Loc, Twine("redefinition of machine basic block with id #") +
                        Twine(ID));
if (Alignment)
  MBB->setAlignment(Align(Alignment));
if (HasAddressTaken)
  MBB->setHasAddressTaken();
MBB->setIsEHPad(IsLandingPad);
MBB->setIsInlineAsmBrIndirectTarget(IsInlineAsmBrIndirectTarget);
MBB->setIsEHFuncletEntry(IsEHFuncletEntry);
if (SectionID.hasValue()) {
  MBB->setSectionID(SectionID.getValue());
  MF.setBBSectionsType(BasicBlockSection::List);
}
return false;
749}

751bool MIParser::parseBasicBlockDefinitions(
  DenseMap<unsigned, MachineBasicBlock *> &MBBSlots) {
lex();
// Skip until the first machine basic block.
while (Token.is(MIToken::Newline))
  lex();
if (Token.isErrorOrEOF())
  return Token.isError();
if (Token.isNot(MIToken::MachineBasicBlockLabel))
  return error("expected a basic block definition before instructions");
unsigned BraceDepth = 0;
do {
  if (parseBasicBlockDefinition(MBBSlots))
    return true;
  bool IsAfterNewline = false;
  // Skip until the next machine basic block.
  while (true) {
    if ((Token.is(MIToken::MachineBasicBlockLabel) && IsAfterNewline) ||
        Token.isErrorOrEOF())
      break;
    else if (Token.is(MIToken::MachineBasicBlockLabel))
      return error("basic block definition should be located at the start of "
                   "the line");
    else if (consumeIfPresent(MIToken::Newline)) {
      IsAfterNewline = true;
      continue;
    }
    IsAfterNewline = false;
    if (Token.is(MIToken::lbrace))
      ++BraceDepth;
    if (Token.is(MIToken::rbrace)) {
      if (!BraceDepth)
        return error("extraneous closing brace ('}')");
      --BraceDepth;
    }
    lex();
  }
  // Verify that we closed all of the '{' at the end of a file or a block.
  if (!Token.isError() && BraceDepth)
    return error("expected '}'"); // FIXME: Report a note that shows '{'.
} while (!Token.isErrorOrEOF());
return Token.isError();
793}

795bool MIParser::parseBasicBlockLiveins(MachineBasicBlock &MBB) {
assert(Token.is(MIToken::kw_liveins))(static_cast <bool> (Token.is(MIToken::kw_liveins)) ? void
 (0) : __assert_fail ("Token.is(MIToken::kw_liveins)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 796, __extension__ __PRETTY_FUNCTION__));
lex();
if (expectAndConsume(MIToken::colon))
  return true;
if (Token.isNewlineOrEOF()) // Allow an empty list of liveins.
  return false;
do {
  if (Token.isNot(MIToken::NamedRegister))
    return error("expected a named register");
  Register Reg;
  if (parseNamedRegister(Reg))
    return true;
  lex();
  LaneBitmask Mask = LaneBitmask::getAll();
  if (consumeIfPresent(MIToken::colon)) {
    // Parse lane mask.
    if (Token.isNot(MIToken::IntegerLiteral) &&
        Token.isNot(MIToken::HexLiteral))
      return error("expected a lane mask");
    static_assert(sizeof(LaneBitmask::Type) == sizeof(uint64_t),
                  "Use correct get-function for lane mask");
    LaneBitmask::Type V;
    if (getUint64(V))
      return error("invalid lane mask value");
    Mask = LaneBitmask(V);
    lex();
  }
  MBB.addLiveIn(Reg, Mask);
} while (consumeIfPresent(MIToken::comma));
return false;
826}

828bool MIParser::parseBasicBlockSuccessors(MachineBasicBlock &MBB) {
assert(Token.is(MIToken::kw_successors))(static_cast <bool> (Token.is(MIToken::kw_successors)) ?
 void (0) : __assert_fail ("Token.is(MIToken::kw_successors)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 829, __extension__
 __PRETTY_FUNCTION__));
lex();
if (expectAndConsume(MIToken::colon))
  return true;
if (Token.isNewlineOrEOF()) // Allow an empty list of successors.
  return false;
do {
  if (Token.isNot(MIToken::MachineBasicBlock))
    return error("expected a machine basic block reference");
  MachineBasicBlock *SuccMBB = nullptr;
  if (parseMBBReference(SuccMBB))
    return true;
  lex();
  unsigned Weight = 0;
  if (consumeIfPresent(MIToken::lparen)) {
    if (Token.isNot(MIToken::IntegerLiteral) &&
        Token.isNot(MIToken::HexLiteral))
      return error("expected an integer literal after '('");
    if (getUnsigned(Weight))
      return true;
    lex();
    if (expectAndConsume(MIToken::rparen))
      return true;
  }
  MBB.addSuccessor(SuccMBB, BranchProbability::getRaw(Weight));
} while (consumeIfPresent(MIToken::comma));
MBB.normalizeSuccProbs();
return false;
857}

859bool MIParser::parseBasicBlock(MachineBasicBlock &MBB,
                             MachineBasicBlock *&AddFalthroughFrom) {
// Skip the definition.
assert(Token.is(MIToken::MachineBasicBlockLabel))(static_cast <bool> (Token.is(MIToken::MachineBasicBlockLabel
)) ? void (0) : __assert_fail ("Token.is(MIToken::MachineBasicBlockLabel)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 862, __extension__
 __PRETTY_FUNCTION__));
lex();
if (consumeIfPresent(MIToken::lparen)) {
  while (Token.isNot(MIToken::rparen) && !Token.isErrorOrEOF())
    lex();
  consumeIfPresent(MIToken::rparen);
}
consumeIfPresent(MIToken::colon);

// Parse the liveins and successors.
// N.B: Multiple lists of successors and liveins are allowed and they're
// merged into one.
// Example:
//   liveins: $edi
//   liveins: $esi
//
// is equivalent to
//   liveins: $edi, $esi
bool ExplicitSuccessors = false;
while (true) {
  if (Token.is(MIToken::kw_successors)) {
    if (parseBasicBlockSuccessors(MBB))
      return true;
    ExplicitSuccessors = true;
  } else if (Token.is(MIToken::kw_liveins)) {
    if (parseBasicBlockLiveins(MBB))
      return true;
  } else if (consumeIfPresent(MIToken::Newline)) {
    continue;
  } else
    break;
  if (!Token.isNewlineOrEOF())
    return error("expected line break at the end of a list");
  lex();
}

// Parse the instructions.
bool IsInBundle = false;
MachineInstr *PrevMI = nullptr;
while (!Token.is(MIToken::MachineBasicBlockLabel) &&
       !Token.is(MIToken::Eof)) {
  if (consumeIfPresent(MIToken::Newline))
    continue;
  if (consumeIfPresent(MIToken::rbrace)) {
    // The first parsing pass should verify that all closing '}' have an
    // opening '{'.
    assert(IsInBundle)(static_cast <bool> (IsInBundle) ? void (0) : __assert_fail
 ("IsInBundle", "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 908
, __extension__ __PRETTY_FUNCTION__));
    IsInBundle = false;
    continue;
  }
  MachineInstr *MI = nullptr;
  if (parse(MI))
    return true;
  MBB.insert(MBB.end(), MI);
  if (IsInBundle) {
    PrevMI->setFlag(MachineInstr::BundledSucc);
    MI->setFlag(MachineInstr::BundledPred);
  }
  PrevMI = MI;
  if (Token.is(MIToken::lbrace)) {
    if (IsInBundle)
      return error("nested instruction bundles are not allowed");
    lex();
    // This instruction is the start of the bundle.
    MI->setFlag(MachineInstr::BundledSucc);
    IsInBundle = true;
    if (!Token.is(MIToken::Newline))
      // The next instruction can be on the same line.
      continue;
  }
  assert(Token.isNewlineOrEOF() && "MI is not fully parsed")(static_cast <bool> (Token.isNewlineOrEOF() && "MI is not fully parsed"
) ? void (0) : __assert_fail ("Token.isNewlineOrEOF() && \"MI is not fully parsed\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 932, __extension__
 __PRETTY_FUNCTION__));
  lex();
}

// Construct successor list by searching for basic block machine operands.
if (!ExplicitSuccessors) {
  SmallVector<MachineBasicBlock*,4> Successors;
  bool IsFallthrough;
  guessSuccessors(MBB, Successors, IsFallthrough);
  for (MachineBasicBlock *Succ : Successors)
    MBB.addSuccessor(Succ);

  if (IsFallthrough) {
    AddFalthroughFrom = &MBB;
  } else {
    MBB.normalizeSuccProbs();
  }
}

return false;
952}

954bool MIParser::parseBasicBlocks() {
lex();
// Skip until the first machine basic block.
while (Token.is(MIToken::Newline))
  lex();
if (Token.isErrorOrEOF())
  return Token.isError();
// The first parsing pass should have verified that this token is a MBB label
// in the 'parseBasicBlockDefinitions' method.
assert(Token.is(MIToken::MachineBasicBlockLabel))(static_cast <bool> (Token.is(MIToken::MachineBasicBlockLabel
)) ? void (0) : __assert_fail ("Token.is(MIToken::MachineBasicBlockLabel)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 963, __extension__
 __PRETTY_FUNCTION__));
MachineBasicBlock *AddFalthroughFrom = nullptr;
do {
  MachineBasicBlock *MBB = nullptr;
  if (parseMBBReference(MBB))
    return true;
  if (AddFalthroughFrom) {
    if (!AddFalthroughFrom->isSuccessor(MBB))
      AddFalthroughFrom->addSuccessor(MBB);
    AddFalthroughFrom->normalizeSuccProbs();
    AddFalthroughFrom = nullptr;
  }
  if (parseBasicBlock(*MBB, AddFalthroughFrom))
    return true;
  // The method 'parseBasicBlock' should parse the whole block until the next
  // block or the end of file.
  assert(Token.is(MIToken::MachineBasicBlockLabel) || Token.is(MIToken::Eof))(static_cast <bool> (Token.is(MIToken::MachineBasicBlockLabel
) || Token.is(MIToken::Eof)) ? void (0) : __assert_fail ("Token.is(MIToken::MachineBasicBlockLabel) || Token.is(MIToken::Eof)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 979, __extension__
 __PRETTY_FUNCTION__));
} while (Token.isNot(MIToken::Eof));
return false;
982}

984bool MIParser::parse(MachineInstr *&MI) {
// Parse any register operands before '='
MachineOperand MO = MachineOperand::CreateImm(0);
SmallVector<ParsedMachineOperand, 8> Operands;
while (Token.isRegister() || Token.isRegisterFlag()) {
  auto Loc = Token.location();
  Optional<unsigned> TiedDefIdx;
  if (parseRegisterOperand(MO, TiedDefIdx, /*IsDef=*/true))
    return true;
  Operands.push_back(
      ParsedMachineOperand(MO, Loc, Token.location(), TiedDefIdx));
  if (Token.isNot(MIToken::comma))
    break;
  lex();
}
if (!Operands.empty() && expectAndConsume(MIToken::equal))
  return true;

unsigned OpCode, Flags = 0;
if (Token.isError() || parseInstruction(OpCode, Flags))
  return true;

// Parse the remaining machine operands.
while (!Token.isNewlineOrEOF() && Token.isNot(MIToken::kw_pre_instr_symbol) &&
       Token.isNot(MIToken::kw_post_instr_symbol) &&
       Token.isNot(MIToken::kw_heap_alloc_marker) &&
       Token.isNot(MIToken::kw_debug_location) &&
       Token.isNot(MIToken::kw_debug_instr_number) &&
       Token.isNot(MIToken::coloncolon) && Token.isNot(MIToken::lbrace)) {
  auto Loc = Token.location();
  Optional<unsigned> TiedDefIdx;
  if (parseMachineOperandAndTargetFlags(OpCode, Operands.size(), MO, TiedDefIdx))
    return true;
  Operands.push_back(
      ParsedMachineOperand(MO, Loc, Token.location(), TiedDefIdx));
  if (Token.isNewlineOrEOF() || Token.is(MIToken::coloncolon) ||
      Token.is(MIToken::lbrace))
    break;
  if (Token.isNot(MIToken::comma))
    return error("expected ',' before the next machine operand");
  lex();
}

MCSymbol *PreInstrSymbol = nullptr;
if (Token.is(MIToken::kw_pre_instr_symbol))
  if (parsePreOrPostInstrSymbol(PreInstrSymbol))
    return true;
MCSymbol *PostInstrSymbol = nullptr;
if (Token.is(MIToken::kw_post_instr_symbol))
  if (parsePreOrPostInstrSymbol(PostInstrSymbol))
    return true;
MDNode *HeapAllocMarker = nullptr;
if (Token.is(MIToken::kw_heap_alloc_marker))
  if (parseHeapAllocMarker(HeapAllocMarker))
    return true;

unsigned InstrNum = 0;
if (Token.is(MIToken::kw_debug_instr_number)) {
  lex();
  if (Token.isNot(MIToken::IntegerLiteral))
    return error("expected an integer literal after 'debug-instr-number'");
  if (getUnsigned(InstrNum))
    return true;
  lex();
  // Lex past trailing comma if present.
  if (Token.is(MIToken::comma))
    lex();
}

DebugLoc DebugLocation;
if (Token.is(MIToken::kw_debug_location)) {
  lex();
  MDNode *Node = nullptr;
  if (Token.is(MIToken::exclaim)) {
    if (parseMDNode(Node))
      return true;
  } else if (Token.is(MIToken::md_dilocation)) {
    if (parseDILocation(Node))
      return true;
  } else
    return error("expected a metadata node after 'debug-location'");
  if (!isa<DILocation>(Node))
    return error("referenced metadata is not a DILocation");
  DebugLocation = DebugLoc(Node);
}

// Parse the machine memory operands.
SmallVector<MachineMemOperand *, 2> MemOperands;
if (Token.is(MIToken::coloncolon)) {
  lex();
  while (!Token.isNewlineOrEOF()) {
    MachineMemOperand *MemOp = nullptr;
    if (parseMachineMemoryOperand(MemOp))
      return true;
    MemOperands.push_back(MemOp);
    if (Token.isNewlineOrEOF())
      break;
    if (Token.isNot(MIToken::comma))
      return error("expected ',' before the next machine memory operand");
    lex();
  }
}

const auto &MCID = MF.getSubtarget().getInstrInfo()->get(OpCode);
if (!MCID.isVariadic()) {
  // FIXME: Move the implicit operand verification to the machine verifier.
  if (verifyImplicitOperands(Operands, MCID))
    return true;
}

MI = MF.CreateMachineInstr(MCID, DebugLocation, /*NoImplicit=*/true);
MI->setFlags(Flags);

unsigned NumExplicitOps = 0;
for (const auto &Operand : Operands) {
  bool IsImplicitOp = Operand.Operand.isReg() && Operand.Operand.isImplicit();
  if (!IsImplicitOp) {
    if (!MCID.isVariadic() && NumExplicitOps >= MCID.getNumOperands() &&
        !Operand.Operand.isValidExcessOperand())
      return error("too many operands for instruction");

    ++NumExplicitOps;
  }

  MI->addOperand(MF, Operand.Operand);
}

if (assignRegisterTies(*MI, Operands))
  return true;
if (PreInstrSymbol)
  MI->setPreInstrSymbol(MF, PreInstrSymbol);
if (PostInstrSymbol)
  MI->setPostInstrSymbol(MF, PostInstrSymbol);
if (HeapAllocMarker)
  MI->setHeapAllocMarker(MF, HeapAllocMarker);
if (!MemOperands.empty())
  MI->setMemRefs(MF, MemOperands);
if (InstrNum)
  MI->setDebugInstrNum(InstrNum);
return false;
1124}

1126bool MIParser::parseStandaloneMBB(MachineBasicBlock *&MBB) {
lex();
if (Token.isNot(MIToken::MachineBasicBlock))
  return error("expected a machine basic block reference");
if (parseMBBReference(MBB))
  return true;
lex();
if (Token.isNot(MIToken::Eof))
  return error(
      "expected end of string after the machine basic block reference");
return false;
1137}

1139bool MIParser::parseStandaloneNamedRegister(Register &Reg) {
lex();
if (Token.isNot(MIToken::NamedRegister))
  return error("expected a named register");
if (parseNamedRegister(Reg))
  return true;
lex();
if (Token.isNot(MIToken::Eof))
  return error("expected end of string after the register reference");
return false;
1149}

1151bool MIParser::parseStandaloneVirtualRegister(VRegInfo *&Info) {
lex();
if (Token.isNot(MIToken::VirtualRegister))
  return error("expected a virtual register");
if (parseVirtualRegister(Info))
  return true;
lex();
if (Token.isNot(MIToken::Eof))
  return error("expected end of string after the register reference");
return false;
1161}

1163bool MIParser::parseStandaloneRegister(Register &Reg) {
lex();
if (Token.isNot(MIToken::NamedRegister) &&
    Token.isNot(MIToken::VirtualRegister))
  return error("expected either a named or virtual register");

VRegInfo *Info;
if (parseRegister(Reg, Info))
  return true;

lex();
if (Token.isNot(MIToken::Eof))
  return error("expected end of string after the register reference");
return false;
1177}

1179bool MIParser::parseStandaloneStackObject(int &FI) {
lex();
if (Token.isNot(MIToken::StackObject))
  return error("expected a stack object");
if (parseStackFrameIndex(FI))
  return true;
if (Token.isNot(MIToken::Eof))
  return error("expected end of string after the stack object reference");
return false;
1188}

1190bool MIParser::parseStandaloneMDNode(MDNode *&Node) {
lex();
if (Token.is(MIToken::exclaim)) {
  if (parseMDNode(Node))
    return true;
} else if (Token.is(MIToken::md_diexpr)) {
  if (parseDIExpression(Node))
    return true;
} else if (Token.is(MIToken::md_dilocation)) {
  if (parseDILocation(Node))
    return true;
} else
  return error("expected a metadata node");
if (Token.isNot(MIToken::Eof))
  return error("expected end of string after the metadata node");
return false;
1206}

1208bool MIParser::parseMachineMetadata() {
lex();
if (Token.isNot(MIToken::exclaim))
  return error("expected a metadata node");

lex();
if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
  return error("expected metadata id after '!'");
unsigned ID = 0;
if (getUnsigned(ID))
  return true;
lex();
if (expectAndConsume(MIToken::equal))
  return true;
bool IsDistinct = Token.is(MIToken::kw_distinct);
if (IsDistinct)
  lex();
if (Token.isNot(MIToken::exclaim))
  return error("expected a metadata node");
lex();

MDNode *MD;
if (parseMDTuple(MD, IsDistinct))
  return true;

auto FI = PFS.MachineForwardRefMDNodes.find(ID);
if (FI != PFS.MachineForwardRefMDNodes.end()) {
  FI->second.first->replaceAllUsesWith(MD);
  PFS.MachineForwardRefMDNodes.erase(FI);

  assert(PFS.MachineMetadataNodes[ID] == MD && "Tracking VH didn't work")(static_cast <bool> (PFS.MachineMetadataNodes[ID] == MD
 && "Tracking VH didn't work") ? void (0) : __assert_fail
 ("PFS.MachineMetadataNodes[ID] == MD && \"Tracking VH didn't work\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1238, __extension__
 __PRETTY_FUNCTION__));
} else {
  if (PFS.MachineMetadataNodes.count(ID))
    return error("Metadata id is already used");
  PFS.MachineMetadataNodes[ID].reset(MD);
}

return false;
1246}

1248bool MIParser::parseMDTuple(MDNode *&MD, bool IsDistinct) {
SmallVector<Metadata *, 16> Elts;
if (parseMDNodeVector(Elts))
  return true;
MD = (IsDistinct ? MDTuple::getDistinct
                 : MDTuple::get)(MF.getFunction().getContext(), Elts);
return false;
1255}

1257bool MIParser::parseMDNodeVector(SmallVectorImpl<Metadata *> &Elts) {
if (Token.isNot(MIToken::lbrace))
  return error("expected '{' here");
lex();

if (Token.is(MIToken::rbrace)) {
  lex();
  return false;
}

do {
  Metadata *MD;
  if (parseMetadata(MD))
    return true;

  Elts.push_back(MD);

  if (Token.isNot(MIToken::comma))
    break;
  lex();
} while (true);

if (Token.isNot(MIToken::rbrace))
  return error("expected end of metadata node");
lex();

return false;
1284}

1286// ::= !42
1287// ::= !"string"
1288bool MIParser::parseMetadata(Metadata *&MD) {
if (Token.isNot(MIToken::exclaim))
  return error("expected '!' here");
lex();

if (Token.is(MIToken::StringConstant)) {
  std::string Str;
  if (parseStringConstant(Str))
    return true;
  MD = MDString::get(MF.getFunction().getContext(), Str);
  return false;
}

if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
  return error("expected metadata id after '!'");

SMLoc Loc = mapSMLoc(Token.location());

unsigned ID = 0;
if (getUnsigned(ID))
  return true;
lex();

auto NodeInfo = PFS.IRSlots.MetadataNodes.find(ID);
if (NodeInfo != PFS.IRSlots.MetadataNodes.end()) {
  MD = NodeInfo->second.get();
  return false;
}
// Check machine metadata.
NodeInfo = PFS.MachineMetadataNodes.find(ID);
if (NodeInfo != PFS.MachineMetadataNodes.end()) {
  MD = NodeInfo->second.get();
  return false;
}
// Forward reference.
auto &FwdRef = PFS.MachineForwardRefMDNodes[ID];
FwdRef = std::make_pair(
    MDTuple::getTemporary(MF.getFunction().getContext(), None), Loc);
PFS.MachineMetadataNodes[ID].reset(FwdRef.first.get());
MD = FwdRef.first.get();

return false;
1330}

1332static const char *printImplicitRegisterFlag(const MachineOperand &MO) {
assert(MO.isImplicit())(static_cast <bool> (MO.isImplicit()) ? void (0) : __assert_fail
 ("MO.isImplicit()", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 1333, __extension__ __PRETTY_FUNCTION__));
return MO.isDef() ? "implicit-def" : "implicit";
1335}

1337static std::string getRegisterName(const TargetRegisterInfo *TRI,
                                 Register Reg) {
assert(Register::isPhysicalRegister(Reg) && "expected phys reg")(static_cast <bool> (Register::isPhysicalRegister(Reg) &&
 "expected phys reg") ? void (0) : __assert_fail ("Register::isPhysicalRegister(Reg) && \"expected phys reg\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1339, __extension__
 __PRETTY_FUNCTION__));
return StringRef(TRI->getName(Reg)).lower();
1341}

1343/// Return true if the parsed machine operands contain a given machine operand.
1344static bool isImplicitOperandIn(const MachineOperand &ImplicitOperand,
                              ArrayRef<ParsedMachineOperand> Operands) {
for (const auto &I : Operands) {
  if (ImplicitOperand.isIdenticalTo(I.Operand))
    return true;
}
return false;
1351}

1353bool MIParser::verifyImplicitOperands(ArrayRef<ParsedMachineOperand> Operands,
                                    const MCInstrDesc &MCID) {
if (MCID.isCall())
  // We can't verify call instructions as they can contain arbitrary implicit
  // register and register mask operands.
  return false;

// Gather all the expected implicit operands.
SmallVector<MachineOperand, 4> ImplicitOperands;
if (MCID.ImplicitDefs)
  for (const MCPhysReg *ImpDefs = MCID.getImplicitDefs(); *ImpDefs; ++ImpDefs)
    ImplicitOperands.push_back(
        MachineOperand::CreateReg(*ImpDefs, true, true));
if (MCID.ImplicitUses)
  for (const MCPhysReg *ImpUses = MCID.getImplicitUses(); *ImpUses; ++ImpUses)
    ImplicitOperands.push_back(
        MachineOperand::CreateReg(*ImpUses, false, true));

const auto *TRI = MF.getSubtarget().getRegisterInfo();
assert(TRI && "Expected target register info")(static_cast <bool> (TRI && "Expected target register info"
) ? void (0) : __assert_fail ("TRI && \"Expected target register info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1372, __extension__
 __PRETTY_FUNCTION__));
for (const auto &I : ImplicitOperands) {
  if (isImplicitOperandIn(I, Operands))
    continue;
  return error(Operands.empty() ? Token.location() : Operands.back().End,
               Twine("missing implicit register operand '") +
                   printImplicitRegisterFlag(I) + " $" +
                   getRegisterName(TRI, I.getReg()) + "'");
}
return false;
1382}

1384bool MIParser::parseInstruction(unsigned &OpCode, unsigned &Flags) {
// Allow frame and fast math flags for OPCODE
while (Token.is(MIToken::kw_frame_setup) ||
       Token.is(MIToken::kw_frame_destroy) ||
       Token.is(MIToken::kw_nnan) ||
       Token.is(MIToken::kw_ninf) ||
       Token.is(MIToken::kw_nsz) ||
       Token.is(MIToken::kw_arcp) ||
       Token.is(MIToken::kw_contract) ||
       Token.is(MIToken::kw_afn) ||
       Token.is(MIToken::kw_reassoc) ||
       Token.is(MIToken::kw_nuw) ||
       Token.is(MIToken::kw_nsw) ||
       Token.is(MIToken::kw_exact) ||
       Token.is(MIToken::kw_nofpexcept)) {
  // Mine frame and fast math flags
  if (Token.is(MIToken::kw_frame_setup))
    Flags |= MachineInstr::FrameSetup;
  if (Token.is(MIToken::kw_frame_destroy))
    Flags |= MachineInstr::FrameDestroy;
  if (Token.is(MIToken::kw_nnan))
    Flags |= MachineInstr::FmNoNans;
  if (Token.is(MIToken::kw_ninf))
    Flags |= MachineInstr::FmNoInfs;
  if (Token.is(MIToken::kw_nsz))
    Flags |= MachineInstr::FmNsz;
  if (Token.is(MIToken::kw_arcp))
    Flags |= MachineInstr::FmArcp;
  if (Token.is(MIToken::kw_contract))
    Flags |= MachineInstr::FmContract;
  if (Token.is(MIToken::kw_afn))
    Flags |= MachineInstr::FmAfn;
  if (Token.is(MIToken::kw_reassoc))
    Flags |= MachineInstr::FmReassoc;
  if (Token.is(MIToken::kw_nuw))
    Flags |= MachineInstr::NoUWrap;
  if (Token.is(MIToken::kw_nsw))
    Flags |= MachineInstr::NoSWrap;
  if (Token.is(MIToken::kw_exact))
    Flags |= MachineInstr::IsExact;
  if (Token.is(MIToken::kw_nofpexcept))
    Flags |= MachineInstr::NoFPExcept;

  lex();
}
if (Token.isNot(MIToken::Identifier))
  return error("expected a machine instruction");
StringRef InstrName = Token.stringValue();
if (PFS.Target.parseInstrName(InstrName, OpCode))
  return error(Twine("unknown machine instruction name '") + InstrName + "'");
lex();
return false;
1436}

1438bool MIParser::parseNamedRegister(Register &Reg) {
assert(Token.is(MIToken::NamedRegister) && "Needs NamedRegister token")(static_cast <bool> (Token.is(MIToken::NamedRegister) &&
 "Needs NamedRegister token") ? void (0) : __assert_fail ("Token.is(MIToken::NamedRegister) && \"Needs NamedRegister token\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1439, __extension__
 __PRETTY_FUNCTION__));
StringRef Name = Token.stringValue();
if (PFS.Target.getRegisterByName(Name, Reg))
  return error(Twine("unknown register name '") + Name + "'");
return false;
1444}

1446bool MIParser::parseNamedVirtualRegister(VRegInfo *&Info) {
assert(Token.is(MIToken::NamedVirtualRegister) && "Expected NamedVReg token")(static_cast <bool> (Token.is(MIToken::NamedVirtualRegister
) && "Expected NamedVReg token") ? void (0) : __assert_fail
 ("Token.is(MIToken::NamedVirtualRegister) && \"Expected NamedVReg token\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1447, __extension__
 __PRETTY_FUNCTION__));
StringRef Name = Token.stringValue();
// TODO: Check that the VReg name is not the same as a physical register name.
//       If it is, then print a warning (when warnings are implemented).
Info = &PFS.getVRegInfoNamed(Name);
return false;
1453}

1455bool MIParser::parseVirtualRegister(VRegInfo *&Info) {
if (Token.is(MIToken::NamedVirtualRegister))
  return parseNamedVirtualRegister(Info);
assert(Token.is(MIToken::VirtualRegister) && "Needs VirtualRegister token")(static_cast <bool> (Token.is(MIToken::VirtualRegister)
 && "Needs VirtualRegister token") ? void (0) : __assert_fail
 ("Token.is(MIToken::VirtualRegister) && \"Needs VirtualRegister token\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1458, __extension__
 __PRETTY_FUNCTION__));
unsigned ID;
if (getUnsigned(ID))
  return true;
Info = &PFS.getVRegInfo(ID);
return false;
1464}

1466bool MIParser::parseRegister(Register &Reg, VRegInfo *&Info) {
switch (Token.kind()) {
case MIToken::underscore:
  Reg = 0;
  return false;
case MIToken::NamedRegister:
  return parseNamedRegister(Reg);
case MIToken::NamedVirtualRegister:
case MIToken::VirtualRegister:
  if (parseVirtualRegister(Info))
    return true;
  Reg = Info->VReg;
  return false;
// TODO: Parse other register kinds.
default:
  llvm_unreachable("The current token should be a register")::llvm::llvm_unreachable_internal("The current token should be a register"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1481);
}
1483}

1485bool MIParser::parseRegisterClassOrBank(VRegInfo &RegInfo) {
if (Token.isNot(MIToken::Identifier) && Token.isNot(MIToken::underscore))
  return error("expected '_', register class, or register bank name");
StringRef::iterator Loc = Token.location();
StringRef Name = Token.stringValue();

// Was it a register class?
const TargetRegisterClass *RC = PFS.Target.getRegClass(Name);
if (RC) {
  lex();

  switch (RegInfo.Kind) {
  case VRegInfo::UNKNOWN:
  case VRegInfo::NORMAL:
    RegInfo.Kind = VRegInfo::NORMAL;
    if (RegInfo.Explicit && RegInfo.D.RC != RC) {
      const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
      return error(Loc, Twine("conflicting register classes, previously: ") +
                   Twine(TRI.getRegClassName(RegInfo.D.RC)));
    }
    RegInfo.D.RC = RC;
    RegInfo.Explicit = true;
    return false;

  case VRegInfo::GENERIC:
  case VRegInfo::REGBANK:
    return error(Loc, "register class specification on generic register");
  }
  llvm_unreachable("Unexpected register kind")::llvm::llvm_unreachable_internal("Unexpected register kind",
 "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1513);
}

// Should be a register bank or a generic register.
const RegisterBank *RegBank = nullptr;
if (Name != "_") {
  RegBank = PFS.Target.getRegBank(Name);
  if (!RegBank)
    return error(Loc, "expected '_', register class, or register bank name");
}

lex();

switch (RegInfo.Kind) {
case VRegInfo::UNKNOWN:
case VRegInfo::GENERIC:
case VRegInfo::REGBANK:
  RegInfo.Kind = RegBank ? VRegInfo::REGBANK : VRegInfo::GENERIC;
  if (RegInfo.Explicit && RegInfo.D.RegBank != RegBank)
    return error(Loc, "conflicting generic register banks");
  RegInfo.D.RegBank = RegBank;
  RegInfo.Explicit = true;
  return false;

case VRegInfo::NORMAL:
  return error(Loc, "register bank specification on normal register");
}
llvm_unreachable("Unexpected register kind")::llvm::llvm_unreachable_internal("Unexpected register kind",
 "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1540);
1541}

1543bool MIParser::parseRegisterFlag(unsigned &Flags) {
const unsigned OldFlags = Flags;
switch (Token.kind()) {
case MIToken::kw_implicit:
  Flags |= RegState::Implicit;
  break;
case MIToken::kw_implicit_define:
  Flags |= RegState::ImplicitDefine;
  break;
case MIToken::kw_def:
  Flags |= RegState::Define;
  break;
case MIToken::kw_dead:
  Flags |= RegState::Dead;
  break;
case MIToken::kw_killed:
  Flags |= RegState::Kill;
  break;
case MIToken::kw_undef:
  Flags |= RegState::Undef;
  break;
case MIToken::kw_internal:
  Flags |= RegState::InternalRead;
  break;
case MIToken::kw_early_clobber:
  Flags |= RegState::EarlyClobber;
  break;
case MIToken::kw_debug_use:
  Flags |= RegState::Debug;
  break;
case MIToken::kw_renamable:
  Flags |= RegState::Renamable;
  break;
default:
  llvm_unreachable("The current token should be a register flag")::llvm::llvm_unreachable_internal("The current token should be a register flag"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1577);
}
if (OldFlags == Flags)
  // We know that the same flag is specified more than once when the flags
  // weren't modified.
  return error("duplicate '" + Token.stringValue() + "' register flag");
lex();
return false;
1585}

1587bool MIParser::parseSubRegisterIndex(unsigned &SubReg) {
assert(Token.is(MIToken::dot))(static_cast <bool> (Token.is(MIToken::dot)) ? void (0)
 : __assert_fail ("Token.is(MIToken::dot)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 1588, __extension__ __PRETTY_FUNCTION__));
lex();
if (Token.isNot(MIToken::Identifier))
  return error("expected a subregister index after '.'");
auto Name = Token.stringValue();
SubReg = PFS.Target.getSubRegIndex(Name);
if (!SubReg)
  return error(Twine("use of unknown subregister index '") + Name + "'");
lex();
return false;
1598}

1600bool MIParser::parseRegisterTiedDefIndex(unsigned &TiedDefIdx) {
if (!consumeIfPresent(MIToken::kw_tied_def))
  return true;
if (Token.isNot(MIToken::IntegerLiteral))
  return error("expected an integer literal after 'tied-def'");
if (getUnsigned(TiedDefIdx))
  return true;
lex();
if (expectAndConsume(MIToken::rparen))
  return true;
return false;
1611}

1613bool MIParser::assignRegisterTies(MachineInstr &MI,
                                ArrayRef<ParsedMachineOperand> Operands) {
SmallVector<std::pair<unsigned, unsigned>, 4> TiedRegisterPairs;
for (unsigned I = 0, E = Operands.size(); I != E; ++I) {
  if (!Operands[I].TiedDefIdx)
    continue;
  // The parser ensures that this operand is a register use, so we just have
  // to check the tied-def operand.
  unsigned DefIdx = Operands[I].TiedDefIdx.getValue();
  if (DefIdx >= E)
    return error(Operands[I].Begin,
                 Twine("use of invalid tied-def operand index '" +
                       Twine(DefIdx) + "'; instruction has only ") +
                     Twine(E) + " operands");
  const auto &DefOperand = Operands[DefIdx].Operand;
  if (!DefOperand.isReg() || !DefOperand.isDef())
    // FIXME: add note with the def operand.
    return error(Operands[I].Begin,
                 Twine("use of invalid tied-def operand index '") +
                     Twine(DefIdx) + "'; the operand #" + Twine(DefIdx) +
                     " isn't a defined register");
  // Check that the tied-def operand wasn't tied elsewhere.
  for (const auto &TiedPair : TiedRegisterPairs) {
    if (TiedPair.first == DefIdx)
      return error(Operands[I].Begin,
                   Twine("the tied-def operand #") + Twine(DefIdx) +
                       " is already tied with another register operand");
  }
  TiedRegisterPairs.push_back(std::make_pair(DefIdx, I));
}
// FIXME: Verify that for non INLINEASM instructions, the def and use tied
// indices must be less than tied max.
for (const auto &TiedPair : TiedRegisterPairs)
  MI.tieOperands(TiedPair.first, TiedPair.second);
return false;
1648}

1650bool MIParser::parseRegisterOperand(MachineOperand &Dest,
                                  Optional<unsigned> &TiedDefIdx,
                                  bool IsDef) {
unsigned Flags = IsDef ? RegState::Define : 0;
while (Token.isRegisterFlag()) {
  if (parseRegisterFlag(Flags))
    return true;
}
if (!Token.isRegister())
  return error("expected a register after register flags");
Register Reg;
VRegInfo *RegInfo;
if (parseRegister(Reg, RegInfo))
  return true;
lex();
unsigned SubReg = 0;
if (Token.is(MIToken::dot)) {
  if (parseSubRegisterIndex(SubReg))
    return true;
  if (!Register::isVirtualRegister(Reg))
    return error("subregister index expects a virtual register");
}
if (Token.is(MIToken::colon)) {
  if (!Register::isVirtualRegister(Reg))
    return error("register class specification expects a virtual register");
  lex();
  if (parseRegisterClassOrBank(*RegInfo))
      return true;
}
MachineRegisterInfo &MRI = MF.getRegInfo();
if ((Flags & RegState::Define) == 0) {
  if (consumeIfPresent(MIToken::lparen)) {
    unsigned Idx;
    if (!parseRegisterTiedDefIndex(Idx))
      TiedDefIdx = Idx;
    else {
      // Try a redundant low-level type.
      LLT Ty;
      if (parseLowLevelType(Token.location(), Ty))
        return error("expected tied-def or low-level type after '('");

      if (expectAndConsume(MIToken::rparen))
        return true;

      if (MRI.getType(Reg).isValid() && MRI.getType(Reg) != Ty)
        return error("inconsistent type for generic virtual register");

      MRI.setRegClassOrRegBank(Reg, static_cast<RegisterBank *>(nullptr));
      MRI.setType(Reg, Ty);
    }
  }
} else if (consumeIfPresent(MIToken::lparen)) {
  // Virtual registers may have a tpe with GlobalISel.
  if (!Register::isVirtualRegister(Reg))
    return error("unexpected type on physical register");

  LLT Ty;
  if (parseLowLevelType(Token.location(), Ty))
    return true;

  if (expectAndConsume(MIToken::rparen))
    return true;

  if (MRI.getType(Reg).isValid() && MRI.getType(Reg) != Ty)
    return error("inconsistent type for generic virtual register");

  MRI.setRegClassOrRegBank(Reg, static_cast<RegisterBank *>(nullptr));
  MRI.setType(Reg, Ty);
} else if (Register::isVirtualRegister(Reg)) {
  // Generic virtual registers must have a type.
  // If we end up here this means the type hasn't been specified and
  // this is bad!
  if (RegInfo->Kind == VRegInfo::GENERIC ||
      RegInfo->Kind == VRegInfo::REGBANK)
    return error("generic virtual registers must have a type");
}

if (Flags & RegState::Define) {
  if (Flags & RegState::Kill)
    return error("cannot have a killed def operand");
} else {
  if (Flags & RegState::Dead)
    return error("cannot have a dead use operand");
}

Dest = MachineOperand::CreateReg(
    Reg, Flags & RegState::Define, Flags & RegState::Implicit,
    Flags & RegState::Kill, Flags & RegState::Dead, Flags & RegState::Undef,
    Flags & RegState::EarlyClobber, SubReg, Flags & RegState::Debug,
    Flags & RegState::InternalRead, Flags & RegState::Renamable);

return false;
1742}

1744bool MIParser::parseImmediateOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::IntegerLiteral))(static_cast <bool> (Token.is(MIToken::IntegerLiteral))
 ? void (0) : __assert_fail ("Token.is(MIToken::IntegerLiteral)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1745, __extension__
 __PRETTY_FUNCTION__));
const APSInt &Int = Token.integerValue();
if (Int.getMinSignedBits() > 64)
  return error("integer literal is too large to be an immediate operand");
Dest = MachineOperand::CreateImm(Int.getExtValue());
lex();
return false;
1752}

1754bool MIParser::parseTargetImmMnemonic(const unsigned OpCode,
                                    const unsigned OpIdx,
                                    MachineOperand &Dest,
                                    const MIRFormatter &MF) {
assert(Token.is(MIToken::dot))(static_cast <bool> (Token.is(MIToken::dot)) ? void (0)
 : __assert_fail ("Token.is(MIToken::dot)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 1758, __extension__ __PRETTY_FUNCTION__));
auto Loc = Token.location(); // record start position
size_t Len = 1;              // for "."
lex();

// Handle the case that mnemonic starts with number.
if (Token.is(MIToken::IntegerLiteral)) {
  Len += Token.range().size();
  lex();
}

StringRef Src;
if (Token.is(MIToken::comma))
  Src = StringRef(Loc, Len);
else {
  assert(Token.is(MIToken::Identifier))(static_cast <bool> (Token.is(MIToken::Identifier)) ? void
 (0) : __assert_fail ("Token.is(MIToken::Identifier)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 1773, __extension__ __PRETTY_FUNCTION__));
  Src = StringRef(Loc, Len + Token.stringValue().size());
}
int64_t Val;
if (MF.parseImmMnemonic(OpCode, OpIdx, Src, Val,
                        [this](StringRef::iterator Loc, const Twine &Msg)
                            -> bool { return error(Loc, Msg); }))
  return true;

Dest = MachineOperand::CreateImm(Val);
if (!Token.is(MIToken::comma))
  lex();
return false;
1786}

1788static bool parseIRConstant(StringRef::iterator Loc, StringRef StringValue,
                          PerFunctionMIParsingState &PFS, const Constant *&C,
                          ErrorCallbackType ErrCB) {
auto Source = StringValue.str(); // The source has to be null terminated.
SMDiagnostic Err;
C = parseConstantValue(Source, Err, *PFS.MF.getFunction().getParent(),
                       &PFS.IRSlots);
if (!C)
  return ErrCB(Loc + Err.getColumnNo(), Err.getMessage());
return false;
1798}

1800bool MIParser::parseIRConstant(StringRef::iterator Loc, StringRef StringValue,
                             const Constant *&C) {
return ::parseIRConstant(
    Loc, StringValue, PFS, C,
    [this](StringRef::iterator Loc, const Twine &Msg) -> bool {
      return error(Loc, Msg);
    });
1807}

1809bool MIParser::parseIRConstant(StringRef::iterator Loc, const Constant *&C) {
if (parseIRConstant(Loc, StringRef(Loc, Token.range().end() - Loc), C))
  return true;
lex();
return false;
1814}

1816// See LLT implemntation for bit size limits.
1817static bool verifyScalarSize(uint64_t Size) {
return Size != 0 && isUInt<16>(Size);
1819}

1821static bool verifyVectorElementCount(uint64_t NumElts) {
return NumElts != 0 && isUInt<16>(NumElts);
1823}

1825static bool verifyAddrSpace(uint64_t AddrSpace) {
return isUInt<24>(AddrSpace);
1827}

1829bool MIParser::parseLowLevelType(StringRef::iterator Loc, LLT &Ty) {
if (Token.range().front() == 's' || Token.range().front() == 'p') {
  StringRef SizeStr = Token.range().drop_front();
  if (SizeStr.size() == 0 || !llvm::all_of(SizeStr, isdigit))
    return error("expected integers after 's'/'p' type character");
}

if (Token.range().front() == 's') {
  auto ScalarSize = APSInt(Token.range().drop_front()).getZExtValue();
  if (!verifyScalarSize(ScalarSize))
    return error("invalid size for scalar type");

  Ty = LLT::scalar(ScalarSize);
  lex();
  return false;
} else if (Token.range().front() == 'p') {
  const DataLayout &DL = MF.getDataLayout();
  uint64_t AS = APSInt(Token.range().drop_front()).getZExtValue();
  if (!verifyAddrSpace(AS))
    return error("invalid address space number");

  Ty = LLT::pointer(AS, DL.getPointerSizeInBits(AS));
  lex();
  return false;
}

// Now we're looking for a vector.
if (Token.isNot(MIToken::less))
  return error(Loc,
               "expected sN, pA, <M x sN>, or <M x pA> for GlobalISel type");
lex();

if (Token.isNot(MIToken::IntegerLiteral))
  return error(Loc, "expected <M x sN> or <M x pA> for vector type");
uint64_t NumElements = Token.integerValue().getZExtValue();
if (!verifyVectorElementCount(NumElements))
  return error("invalid number of vector elements");

lex();

if (Token.isNot(MIToken::Identifier) || Token.stringValue() != "x")
  return error(Loc, "expected <M x sN> or <M x pA> for vector type");
lex();

if (Token.range().front() != 's' && Token.range().front() != 'p')
  return error(Loc, "expected <M x sN> or <M x pA> for vector type");
StringRef SizeStr = Token.range().drop_front();
if (SizeStr.size() == 0 || !llvm::all_of(SizeStr, isdigit))
  return error("expected integers after 's'/'p' type character");

if (Token.range().front() == 's') {
  auto ScalarSize = APSInt(Token.range().drop_front()).getZExtValue();
  if (!verifyScalarSize(ScalarSize))
    return error("invalid size for scalar type");
  Ty = LLT::scalar(ScalarSize);
} else if (Token.range().front() == 'p') {
  const DataLayout &DL = MF.getDataLayout();
  uint64_t AS = APSInt(Token.range().drop_front()).getZExtValue();
  if (!verifyAddrSpace(AS))
    return error("invalid address space number");

  Ty = LLT::pointer(AS, DL.getPointerSizeInBits(AS));
} else
  return error(Loc, "expected <M x sN> or <M x pA> for vector type");
lex();

if (Token.isNot(MIToken::greater))
  return error(Loc, "expected <M x sN> or <M x pA> for vector type");
lex();

Ty = LLT::fixed_vector(NumElements, Ty);
return false;
1901}

1903bool MIParser::parseTypedImmediateOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::Identifier))(static_cast <bool> (Token.is(MIToken::Identifier)) ? void
 (0) : __assert_fail ("Token.is(MIToken::Identifier)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 1904, __extension__ __PRETTY_FUNCTION__));
StringRef TypeStr = Token.range();
if (TypeStr.front() != 'i' && TypeStr.front() != 's' &&
    TypeStr.front() != 'p')
  return error(
      "a typed immediate operand should start with one of 'i', 's', or 'p'");
StringRef SizeStr = Token.range().drop_front();
if (SizeStr.size() == 0 || !llvm::all_of(SizeStr, isdigit))
  return error("expected integers after 'i'/'s'/'p' type character");

auto Loc = Token.location();
lex();
if (Token.isNot(MIToken::IntegerLiteral)) {
  if (Token.isNot(MIToken::Identifier) ||
      !(Token.range() == "true" || Token.range() == "false"))
    return error("expected an integer literal");
}
const Constant *C = nullptr;
if (parseIRConstant(Loc, C))
  return true;
Dest = MachineOperand::CreateCImm(cast<ConstantInt>(C));
return false;
1926}

1928bool MIParser::parseFPImmediateOperand(MachineOperand &Dest) {
auto Loc = Token.location();
lex();
if (Token.isNot(MIToken::FloatingPointLiteral) &&
    Token.isNot(MIToken::HexLiteral))
  return error("expected a floating point literal");
const Constant *C = nullptr;
if (parseIRConstant(Loc, C))
  return true;
Dest = MachineOperand::CreateFPImm(cast<ConstantFP>(C));
return false;
1939}

1941static bool getHexUint(const MIToken &Token, APInt &Result) {
assert(Token.is(MIToken::HexLiteral))(static_cast <bool> (Token.is(MIToken::HexLiteral)) ? void
 (0) : __assert_fail ("Token.is(MIToken::HexLiteral)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 1942, __extension__ __PRETTY_FUNCTION__));
StringRef S = Token.range();
assert(S[0] == '0' && tolower(S[1]) == 'x')(static_cast <bool> (S[0] == '0' && tolower(S[1
]) == 'x') ? void (0) : __assert_fail ("S[0] == '0' && tolower(S[1]) == 'x'"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1944, __extension__
 __PRETTY_FUNCTION__));
// This could be a floating point literal with a special prefix.
if (!isxdigit(S[2]))
  return true;
StringRef V = S.substr(2);
APInt A(V.size()*4, V, 16);

// If A is 0, then A.getActiveBits() is 0. This isn't a valid bitwidth. Make
// sure it isn't the case before constructing result.
unsigned NumBits = (A == 0) ? 32 : A.getActiveBits();
Result = APInt(NumBits, ArrayRef<uint64_t>(A.getRawData(), A.getNumWords()));
return false;
1956}

1958static bool getUnsigned(const MIToken &Token, unsigned &Result,
                      ErrorCallbackType ErrCB) {
if (Token.hasIntegerValue()) {
7
←
Taking true branch→
  const uint64_t Limit = uint64_t(std::numeric_limits<unsigned>::max()) + 1;
  uint64_t Val64 = Token.integerValue().getLimitedValue(Limit);
  if (Val647.1
'Val64' is equal to 'Limit'
 == Limit)
8
←
Taking true branch→
    return ErrCB(Token.location(), "expected 32-bit integer (too large)");
9
←
Returning without writing to 'Result'→
  Result = Val64;
  return false;
}
if (Token.is(MIToken::HexLiteral)) {
  APInt A;
  if (getHexUint(Token, A))
    return true;
  if (A.getBitWidth() > 32)
    return ErrCB(Token.location(), "expected 32-bit integer (too large)");
  Result = A.getZExtValue();
  return false;
}
return true;
1978}

1980bool MIParser::getUnsigned(unsigned &Result) {
return ::getUnsigned(
    Token, Result, [this](StringRef::iterator Loc, const Twine &Msg) -> bool {
      return error(Loc, Msg);
    });
1985}

1987bool MIParser::parseMBBReference(MachineBasicBlock *&MBB) {
assert(Token.is(MIToken::MachineBasicBlock) ||(static_cast <bool> (Token.is(MIToken::MachineBasicBlock
) || Token.is(MIToken::MachineBasicBlockLabel)) ? void (0) : __assert_fail
 ("Token.is(MIToken::MachineBasicBlock) || Token.is(MIToken::MachineBasicBlockLabel)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1989, __extension__
 __PRETTY_FUNCTION__))
       Token.is(MIToken::MachineBasicBlockLabel))(static_cast <bool> (Token.is(MIToken::MachineBasicBlock
) || Token.is(MIToken::MachineBasicBlockLabel)) ? void (0) : __assert_fail
 ("Token.is(MIToken::MachineBasicBlock) || Token.is(MIToken::MachineBasicBlockLabel)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 1989, __extension__
 __PRETTY_FUNCTION__));
unsigned Number;
if (getUnsigned(Number))
  return true;
auto MBBInfo = PFS.MBBSlots.find(Number);
if (MBBInfo == PFS.MBBSlots.end())
  return error(Twine("use of undefined machine basic block #") +
               Twine(Number));
MBB = MBBInfo->second;
// TODO: Only parse the name if it's a MachineBasicBlockLabel. Deprecate once
// we drop the <irname> from the bb.<id>.<irname> format.
if (!Token.stringValue().empty() && Token.stringValue() != MBB->getName())
  return error(Twine("the name of machine basic block #") + Twine(Number) +
               " isn't '" + Token.stringValue() + "'");
return false;
2004}

2006bool MIParser::parseMBBOperand(MachineOperand &Dest) {
MachineBasicBlock *MBB;
if (parseMBBReference(MBB))
  return true;
Dest = MachineOperand::CreateMBB(MBB);
lex();
return false;
2013}

2015bool MIParser::parseStackFrameIndex(int &FI) {
assert(Token.is(MIToken::StackObject))(static_cast <bool> (Token.is(MIToken::StackObject)) ? void
 (0) : __assert_fail ("Token.is(MIToken::StackObject)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 2016, __extension__ __PRETTY_FUNCTION__));
unsigned ID;
if (getUnsigned(ID))
  return true;
auto ObjectInfo = PFS.StackObjectSlots.find(ID);
if (ObjectInfo == PFS.StackObjectSlots.end())
  return error(Twine("use of undefined stack object '%stack.") + Twine(ID) +
               "'");
StringRef Name;
if (const auto *Alloca =
        MF.getFrameInfo().getObjectAllocation(ObjectInfo->second))
  Name = Alloca->getName();
if (!Token.stringValue().empty() && Token.stringValue() != Name)
  return error(Twine("the name of the stack object '%stack.") + Twine(ID) +
               "' isn't '" + Token.stringValue() + "'");
lex();
FI = ObjectInfo->second;
return false;
2034}

2036bool MIParser::parseStackObjectOperand(MachineOperand &Dest) {
int FI;
if (parseStackFrameIndex(FI))
  return true;
Dest = MachineOperand::CreateFI(FI);
return false;
2042}

2044bool MIParser::parseFixedStackFrameIndex(int &FI) {
assert(Token.is(MIToken::FixedStackObject))(static_cast <bool> (Token.is(MIToken::FixedStackObject
)) ? void (0) : __assert_fail ("Token.is(MIToken::FixedStackObject)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2045, __extension__
 __PRETTY_FUNCTION__));
unsigned ID;
if (getUnsigned(ID))
  return true;
auto ObjectInfo = PFS.FixedStackObjectSlots.find(ID);
if (ObjectInfo == PFS.FixedStackObjectSlots.end())
  return error(Twine("use of undefined fixed stack object '%fixed-stack.") +
               Twine(ID) + "'");
lex();
FI = ObjectInfo->second;
return false;
2056}

2058bool MIParser::parseFixedStackObjectOperand(MachineOperand &Dest) {
int FI;
if (parseFixedStackFrameIndex(FI))
  return true;
Dest = MachineOperand::CreateFI(FI);
return false;
2064}

2066static bool parseGlobalValue(const MIToken &Token,
                           PerFunctionMIParsingState &PFS, GlobalValue *&GV,
                           ErrorCallbackType ErrCB) {
switch (Token.kind()) {
4
←
Control jumps to 'case GlobalValue:'  at line 2078→
case MIToken::NamedGlobalValue: {
  const Module *M = PFS.MF.getFunction().getParent();
  GV = M->getNamedValue(Token.stringValue());
  if (!GV)
    return ErrCB(Token.location(), Twine("use of undefined global value '") +
                                       Token.range() + "'");
  break;
}
case MIToken::GlobalValue: {
  unsigned GVIdx;
5
←
'GVIdx' declared without an initial value→
  if (getUnsigned(Token, GVIdx, ErrCB))
6
←
Calling 'getUnsigned'→
10
←
Returning from 'getUnsigned'→
11
←
Assuming the condition is false→
12
←
Taking false branch→
    return true;
  if (GVIdx >= PFS.IRSlots.GlobalValues.size())
13
←
The left operand of '>=' is a garbage value
    return ErrCB(Token.location(), Twine("use of undefined global value '@") +
                                       Twine(GVIdx) + "'");
  GV = PFS.IRSlots.GlobalValues[GVIdx];
  break;
}
default:
  llvm_unreachable("The current token should be a global value")::llvm::llvm_unreachable_internal("The current token should be a global value"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2089);
}
return false;
2092}

2094bool MIParser::parseGlobalValue(GlobalValue *&GV) {
return ::parseGlobalValue(
    Token, PFS, GV,
    [this](StringRef::iterator Loc, const Twine &Msg) -> bool {
      return error(Loc, Msg);
    });
2100}

2102bool MIParser::parseGlobalAddressOperand(MachineOperand &Dest) {
GlobalValue *GV = nullptr;
if (parseGlobalValue(GV))
  return true;
lex();
Dest = MachineOperand::CreateGA(GV, /*Offset=*/0);
if (parseOperandsOffset(Dest))
  return true;
return false;
2111}

2113bool MIParser::parseConstantPoolIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::ConstantPoolItem))(static_cast <bool> (Token.is(MIToken::ConstantPoolItem
)) ? void (0) : __assert_fail ("Token.is(MIToken::ConstantPoolItem)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2114, __extension__
 __PRETTY_FUNCTION__));
unsigned ID;
if (getUnsigned(ID))
  return true;
auto ConstantInfo = PFS.ConstantPoolSlots.find(ID);
if (ConstantInfo == PFS.ConstantPoolSlots.end())
  return error("use of undefined constant '%const." + Twine(ID) + "'");
lex();
Dest = MachineOperand::CreateCPI(ID, /*Offset=*/0);
if (parseOperandsOffset(Dest))
  return true;
return false;
2126}

2128bool MIParser::parseJumpTableIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::JumpTableIndex))(static_cast <bool> (Token.is(MIToken::JumpTableIndex))
 ? void (0) : __assert_fail ("Token.is(MIToken::JumpTableIndex)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2129, __extension__
 __PRETTY_FUNCTION__));
unsigned ID;
if (getUnsigned(ID))
  return true;
auto JumpTableEntryInfo = PFS.JumpTableSlots.find(ID);
if (JumpTableEntryInfo == PFS.JumpTableSlots.end())
  return error("use of undefined jump table '%jump-table." + Twine(ID) + "'");
lex();
Dest = MachineOperand::CreateJTI(JumpTableEntryInfo->second);
return false;
2139}

2141bool MIParser::parseExternalSymbolOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::ExternalSymbol))(static_cast <bool> (Token.is(MIToken::ExternalSymbol))
 ? void (0) : __assert_fail ("Token.is(MIToken::ExternalSymbol)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2142, __extension__
 __PRETTY_FUNCTION__));
const char *Symbol = MF.createExternalSymbolName(Token.stringValue());
lex();
Dest = MachineOperand::CreateES(Symbol);
if (parseOperandsOffset(Dest))
  return true;
return false;
2149}

2151bool MIParser::parseMCSymbolOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::MCSymbol))(static_cast <bool> (Token.is(MIToken::MCSymbol)) ? void
 (0) : __assert_fail ("Token.is(MIToken::MCSymbol)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 2152, __extension__ __PRETTY_FUNCTION__));
MCSymbol *Symbol = getOrCreateMCSymbol(Token.stringValue());
lex();
Dest = MachineOperand::CreateMCSymbol(Symbol);
if (parseOperandsOffset(Dest))
  return true;
return false;
2159}

2161bool MIParser::parseSubRegisterIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::SubRegisterIndex))(static_cast <bool> (Token.is(MIToken::SubRegisterIndex
)) ? void (0) : __assert_fail ("Token.is(MIToken::SubRegisterIndex)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2162, __extension__
 __PRETTY_FUNCTION__));
StringRef Name = Token.stringValue();
unsigned SubRegIndex = PFS.Target.getSubRegIndex(Token.stringValue());
if (SubRegIndex == 0)
  return error(Twine("unknown subregister index '") + Name + "'");
lex();
Dest = MachineOperand::CreateImm(SubRegIndex);
return false;
2170}

2172bool MIParser::parseMDNode(MDNode *&Node) {
assert(Token.is(MIToken::exclaim))(static_cast <bool> (Token.is(MIToken::exclaim)) ? void
 (0) : __assert_fail ("Token.is(MIToken::exclaim)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 2173, __extension__ __PRETTY_FUNCTION__));

auto Loc = Token.location();
lex();
if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
  return error("expected metadata id after '!'");
unsigned ID;
if (getUnsigned(ID))
  return true;
auto NodeInfo = PFS.IRSlots.MetadataNodes.find(ID);
if (NodeInfo == PFS.IRSlots.MetadataNodes.end()) {
  NodeInfo = PFS.MachineMetadataNodes.find(ID);
  if (NodeInfo == PFS.MachineMetadataNodes.end())
    return error(Loc, "use of undefined metadata '!" + Twine(ID) + "'");
}
lex();
Node = NodeInfo->second.get();
return false;
2191}

2193bool MIParser::parseDIExpression(MDNode *&Expr) {
assert(Token.is(MIToken::md_diexpr))(static_cast <bool> (Token.is(MIToken::md_diexpr)) ? void
 (0) : __assert_fail ("Token.is(MIToken::md_diexpr)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 2194, __extension__ __PRETTY_FUNCTION__));
lex();

// FIXME: Share this parsing with the IL parser.
SmallVector<uint64_t, 8> Elements;

if (expectAndConsume(MIToken::lparen))
  return true;

if (Token.isNot(MIToken::rparen)) {
  do {
    if (Token.is(MIToken::Identifier)) {
      if (unsigned Op = dwarf::getOperationEncoding(Token.stringValue())) {
        lex();
        Elements.push_back(Op);
        continue;
      }
      if (unsigned Enc = dwarf::getAttributeEncoding(Token.stringValue())) {
        lex();
        Elements.push_back(Enc);
        continue;
      }
      return error(Twine("invalid DWARF op '") + Token.stringValue() + "'");
    }

    if (Token.isNot(MIToken::IntegerLiteral) ||
        Token.integerValue().isSigned())
      return error("expected unsigned integer");

    auto &U = Token.integerValue();
    if (U.ugt(UINT64_MAX(18446744073709551615UL)))
      return error("element too large, limit is " + Twine(UINT64_MAX(18446744073709551615UL)));
    Elements.push_back(U.getZExtValue());
    lex();

  } while (consumeIfPresent(MIToken::comma));
}

if (expectAndConsume(MIToken::rparen))
  return true;

Expr = DIExpression::get(MF.getFunction().getContext(), Elements);
return false;
2237}

2239bool MIParser::parseDILocation(MDNode *&Loc) {
assert(Token.is(MIToken::md_dilocation))(static_cast <bool> (Token.is(MIToken::md_dilocation)) ?
 void (0) : __assert_fail ("Token.is(MIToken::md_dilocation)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2240, __extension__
 __PRETTY_FUNCTION__));
lex();

bool HaveLine = false;
unsigned Line = 0;
unsigned Column = 0;
MDNode *Scope = nullptr;
MDNode *InlinedAt = nullptr;
bool ImplicitCode = false;

if (expectAndConsume(MIToken::lparen))
  return true;

if (Token.isNot(MIToken::rparen)) {
  do {
    if (Token.is(MIToken::Identifier)) {
      if (Token.stringValue() == "line") {
        lex();
        if (expectAndConsume(MIToken::colon))
          return true;
        if (Token.isNot(MIToken::IntegerLiteral) ||
            Token.integerValue().isSigned())
          return error("expected unsigned integer");
        Line = Token.integerValue().getZExtValue();
        HaveLine = true;
        lex();
        continue;
      }
      if (Token.stringValue() == "column") {
        lex();
        if (expectAndConsume(MIToken::colon))
          return true;
        if (Token.isNot(MIToken::IntegerLiteral) ||
            Token.integerValue().isSigned())
          return error("expected unsigned integer");
        Column = Token.integerValue().getZExtValue();
        lex();
        continue;
      }
      if (Token.stringValue() == "scope") {
        lex();
        if (expectAndConsume(MIToken::colon))
          return true;
        if (parseMDNode(Scope))
          return error("expected metadata node");
        if (!isa<DIScope>(Scope))
          return error("expected DIScope node");
        continue;
      }
      if (Token.stringValue() == "inlinedAt") {
        lex();
        if (expectAndConsume(MIToken::colon))
          return true;
        if (Token.is(MIToken::exclaim)) {
          if (parseMDNode(InlinedAt))
            return true;
        } else if (Token.is(MIToken::md_dilocation)) {
          if (parseDILocation(InlinedAt))
            return true;
        } else
          return error("expected metadata node");
        if (!isa<DILocation>(InlinedAt))
          return error("expected DILocation node");
        continue;
      }
      if (Token.stringValue() == "isImplicitCode") {
        lex();
        if (expectAndConsume(MIToken::colon))
          return true;
        if (!Token.is(MIToken::Identifier))
          return error("expected true/false");
        // As far as I can see, we don't have any existing need for parsing
        // true/false in MIR yet. Do it ad-hoc until there's something else
        // that needs it.
        if (Token.stringValue() == "true")
          ImplicitCode = true;
        else if (Token.stringValue() == "false")
          ImplicitCode = false;
        else
          return error("expected true/false");
        lex();
        continue;
      }
    }
    return error(Twine("invalid DILocation argument '") +
                 Token.stringValue() + "'");
  } while (consumeIfPresent(MIToken::comma));
}

if (expectAndConsume(MIToken::rparen))
  return true;

if (!HaveLine)
  return error("DILocation requires line number");
if (!Scope)
  return error("DILocation requires a scope");

Loc = DILocation::get(MF.getFunction().getContext(), Line, Column, Scope,
                      InlinedAt, ImplicitCode);
return false;
2340}

2342bool MIParser::parseMetadataOperand(MachineOperand &Dest) {
MDNode *Node = nullptr;
if (Token.is(MIToken::exclaim)) {
  if (parseMDNode(Node))
    return true;
} else if (Token.is(MIToken::md_diexpr)) {
  if (parseDIExpression(Node))
    return true;
}
Dest = MachineOperand::CreateMetadata(Node);
return false;
2353}

2355bool MIParser::parseCFIOffset(int &Offset) {
if (Token.isNot(MIToken::IntegerLiteral))
  return error("expected a cfi offset");
if (Token.integerValue().getMinSignedBits() > 32)
  return error("expected a 32 bit integer (the cfi offset is too large)");
Offset = (int)Token.integerValue().getExtValue();
lex();
return false;
2363}

2365bool MIParser::parseCFIRegister(Register &Reg) {
if (Token.isNot(MIToken::NamedRegister))
  return error("expected a cfi register");
Register LLVMReg;
if (parseNamedRegister(LLVMReg))
  return true;
const auto *TRI = MF.getSubtarget().getRegisterInfo();
assert(TRI && "Expected target register info")(static_cast <bool> (TRI && "Expected target register info"
) ? void (0) : __assert_fail ("TRI && \"Expected target register info\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2372, __extension__
 __PRETTY_FUNCTION__));
int DwarfReg = TRI->getDwarfRegNum(LLVMReg, true);
if (DwarfReg < 0)
  return error("invalid DWARF register");
Reg = (unsigned)DwarfReg;
lex();
return false;
2379}

2381bool MIParser::parseCFIAddressSpace(unsigned &AddressSpace) {
if (Token.isNot(MIToken::IntegerLiteral))
  return error("expected a cfi address space literal");
if (Token.integerValue().isSigned())
  return error("expected an unsigned integer (cfi address space)");
AddressSpace = Token.integerValue().getZExtValue();
lex();
return false;
2389}

2391bool MIParser::parseCFIEscapeValues(std::string &Values) {
do {
  if (Token.isNot(MIToken::HexLiteral))
    return error("expected a hexadecimal literal");
  unsigned Value;
  if (getUnsigned(Value))
    return true;
  if (Value > UINT8_MAX(255))
    return error("expected a 8-bit integer (too large)");
  Values.push_back(static_cast<uint8_t>(Value));
  lex();
} while (consumeIfPresent(MIToken::comma));
return false;
2404}

2406bool MIParser::parseCFIOperand(MachineOperand &Dest) {
auto Kind = Token.kind();
lex();
int Offset;
Register Reg;
unsigned AddressSpace;
unsigned CFIIndex;
switch (Kind) {
case MIToken::kw_cfi_same_value:
  if (parseCFIRegister(Reg))
    return true;
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createSameValue(nullptr, Reg));
  break;
case MIToken::kw_cfi_offset:
  if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
      parseCFIOffset(Offset))
    return true;
  CFIIndex =
      MF.addFrameInst(MCCFIInstruction::createOffset(nullptr, Reg, Offset));
  break;
case MIToken::kw_cfi_rel_offset:
  if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
      parseCFIOffset(Offset))
    return true;
  CFIIndex = MF.addFrameInst(
      MCCFIInstruction::createRelOffset(nullptr, Reg, Offset));
  break;
case MIToken::kw_cfi_def_cfa_register:
  if (parseCFIRegister(Reg))
    return true;
  CFIIndex =
      MF.addFrameInst(MCCFIInstruction::createDefCfaRegister(nullptr, Reg));
  break;
case MIToken::kw_cfi_def_cfa_offset:
  if (parseCFIOffset(Offset))
    return true;
  CFIIndex =
      MF.addFrameInst(MCCFIInstruction::cfiDefCfaOffset(nullptr, Offset));
  break;
case MIToken::kw_cfi_adjust_cfa_offset:
  if (parseCFIOffset(Offset))
    return true;
  CFIIndex = MF.addFrameInst(
      MCCFIInstruction::createAdjustCfaOffset(nullptr, Offset));
  break;
case MIToken::kw_cfi_def_cfa:
  if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
      parseCFIOffset(Offset))
    return true;
  CFIIndex =
      MF.addFrameInst(MCCFIInstruction::cfiDefCfa(nullptr, Reg, Offset));
  break;
case MIToken::kw_cfi_llvm_def_aspace_cfa:
  if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
      parseCFIOffset(Offset) || expectAndConsume(MIToken::comma) ||
      parseCFIAddressSpace(AddressSpace))
    return true;
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createLLVMDefAspaceCfa(
      nullptr, Reg, Offset, AddressSpace));
  break;
case MIToken::kw_cfi_remember_state:
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createRememberState(nullptr));
  break;
case MIToken::kw_cfi_restore:
  if (parseCFIRegister(Reg))
    return true;
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createRestore(nullptr, Reg));
  break;
case MIToken::kw_cfi_restore_state:
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createRestoreState(nullptr));
  break;
case MIToken::kw_cfi_undefined:
  if (parseCFIRegister(Reg))
    return true;
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createUndefined(nullptr, Reg));
  break;
case MIToken::kw_cfi_register: {
  Register Reg2;
  if (parseCFIRegister(Reg) || expectAndConsume(MIToken::comma) ||
      parseCFIRegister(Reg2))
    return true;

  CFIIndex =
      MF.addFrameInst(MCCFIInstruction::createRegister(nullptr, Reg, Reg2));
  break;
}
case MIToken::kw_cfi_window_save:
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createWindowSave(nullptr));
  break;
case MIToken::kw_cfi_aarch64_negate_ra_sign_state:
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createNegateRAState(nullptr));
  break;
case MIToken::kw_cfi_escape: {
  std::string Values;
  if (parseCFIEscapeValues(Values))
    return true;
  CFIIndex = MF.addFrameInst(MCCFIInstruction::createEscape(nullptr, Values));
  break;
}
default:
  // TODO: Parse the other CFI operands.
  llvm_unreachable("The current token should be a cfi operand")::llvm::llvm_unreachable_internal("The current token should be a cfi operand"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2507);
}
Dest = MachineOperand::CreateCFIIndex(CFIIndex);
return false;
2511}

2513bool MIParser::parseIRBlock(BasicBlock *&BB, const Function &F) {
switch (Token.kind()) {
case MIToken::NamedIRBlock: {
  BB = dyn_cast_or_null<BasicBlock>(
      F.getValueSymbolTable()->lookup(Token.stringValue()));
  if (!BB)
    return error(Twine("use of undefined IR block '") + Token.range() + "'");
  break;
}
case MIToken::IRBlock: {
  unsigned SlotNumber = 0;
  if (getUnsigned(SlotNumber))
    return true;
  BB = const_cast<BasicBlock *>(getIRBlock(SlotNumber, F));
  if (!BB)
    return error(Twine("use of undefined IR block '%ir-block.") +
                 Twine(SlotNumber) + "'");
  break;
}
default:
  llvm_unreachable("The current token should be an IR block reference")::llvm::llvm_unreachable_internal("The current token should be an IR block reference"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2533);
}
return false;
2536}

2538bool MIParser::parseBlockAddressOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_blockaddress))(static_cast <bool> (Token.is(MIToken::kw_blockaddress)
) ? void (0) : __assert_fail ("Token.is(MIToken::kw_blockaddress)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2539, __extension__
 __PRETTY_FUNCTION__));
lex();
if (expectAndConsume(MIToken::lparen))
  return true;
if (Token.isNot(MIToken::GlobalValue) &&
    Token.isNot(MIToken::NamedGlobalValue))
  return error("expected a global value");
GlobalValue *GV = nullptr;
if (parseGlobalValue(GV))
  return true;
auto *F = dyn_cast<Function>(GV);
if (!F)
  return error("expected an IR function reference");
lex();
if (expectAndConsume(MIToken::comma))
  return true;
BasicBlock *BB = nullptr;
if (Token.isNot(MIToken::IRBlock) && Token.isNot(MIToken::NamedIRBlock))
  return error("expected an IR block reference");
if (parseIRBlock(BB, *F))
  return true;
lex();
if (expectAndConsume(MIToken::rparen))
  return true;
Dest = MachineOperand::CreateBA(BlockAddress::get(F, BB), /*Offset=*/0);
if (parseOperandsOffset(Dest))
  return true;
return false;
2567}

2569bool MIParser::parseIntrinsicOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_intrinsic))(static_cast <bool> (Token.is(MIToken::kw_intrinsic)) ?
 void (0) : __assert_fail ("Token.is(MIToken::kw_intrinsic)",
 "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2570, __extension__
 __PRETTY_FUNCTION__));
lex();
if (expectAndConsume(MIToken::lparen))
  return error("expected syntax intrinsic(@llvm.whatever)");

if (Token.isNot(MIToken::NamedGlobalValue))
  return error("expected syntax intrinsic(@llvm.whatever)");

std::string Name = std::string(Token.stringValue());
lex();

if (expectAndConsume(MIToken::rparen))
  return error("expected ')' to terminate intrinsic name");

// Find out what intrinsic we're dealing with, first try the global namespace
// and then the target's private intrinsics if that fails.
const TargetIntrinsicInfo *TII = MF.getTarget().getIntrinsicInfo();
Intrinsic::ID ID = Function::lookupIntrinsicID(Name);
if (ID == Intrinsic::not_intrinsic && TII)
  ID = static_cast<Intrinsic::ID>(TII->lookupName(Name));

if (ID == Intrinsic::not_intrinsic)
  return error("unknown intrinsic name");
Dest = MachineOperand::CreateIntrinsicID(ID);

return false;
2596}

2598bool MIParser::parsePredicateOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_intpred) || Token.is(MIToken::kw_floatpred))(static_cast <bool> (Token.is(MIToken::kw_intpred) || Token
.is(MIToken::kw_floatpred)) ? void (0) : __assert_fail ("Token.is(MIToken::kw_intpred) || Token.is(MIToken::kw_floatpred)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2599, __extension__
 __PRETTY_FUNCTION__));
bool IsFloat = Token.is(MIToken::kw_floatpred);
lex();

if (expectAndConsume(MIToken::lparen))
  return error("expected syntax intpred(whatever) or floatpred(whatever");

if (Token.isNot(MIToken::Identifier))
  return error("whatever");

CmpInst::Predicate Pred;
if (IsFloat) {
  Pred = StringSwitch<CmpInst::Predicate>(Token.stringValue())
             .Case("false", CmpInst::FCMP_FALSE)
             .Case("oeq", CmpInst::FCMP_OEQ)
             .Case("ogt", CmpInst::FCMP_OGT)
             .Case("oge", CmpInst::FCMP_OGE)
             .Case("olt", CmpInst::FCMP_OLT)
             .Case("ole", CmpInst::FCMP_OLE)
             .Case("one", CmpInst::FCMP_ONE)
             .Case("ord", CmpInst::FCMP_ORD)
             .Case("uno", CmpInst::FCMP_UNO)
             .Case("ueq", CmpInst::FCMP_UEQ)
             .Case("ugt", CmpInst::FCMP_UGT)
             .Case("uge", CmpInst::FCMP_UGE)
             .Case("ult", CmpInst::FCMP_ULT)
             .Case("ule", CmpInst::FCMP_ULE)
             .Case("une", CmpInst::FCMP_UNE)
             .Case("true", CmpInst::FCMP_TRUE)
             .Default(CmpInst::BAD_FCMP_PREDICATE);
  if (!CmpInst::isFPPredicate(Pred))
    return error("invalid floating-point predicate");
} else {
  Pred = StringSwitch<CmpInst::Predicate>(Token.stringValue())
             .Case("eq", CmpInst::ICMP_EQ)
             .Case("ne", CmpInst::ICMP_NE)
             .Case("sgt", CmpInst::ICMP_SGT)
             .Case("sge", CmpInst::ICMP_SGE)
             .Case("slt", CmpInst::ICMP_SLT)
             .Case("sle", CmpInst::ICMP_SLE)
             .Case("ugt", CmpInst::ICMP_UGT)
             .Case("uge", CmpInst::ICMP_UGE)
             .Case("ult", CmpInst::ICMP_ULT)
             .Case("ule", CmpInst::ICMP_ULE)
             .Default(CmpInst::BAD_ICMP_PREDICATE);
  if (!CmpInst::isIntPredicate(Pred))
    return error("invalid integer predicate");
}

lex();
Dest = MachineOperand::CreatePredicate(Pred);
if (expectAndConsume(MIToken::rparen))
  return error("predicate should be terminated by ')'.");

return false;
2654}

2656bool MIParser::parseShuffleMaskOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_shufflemask))(static_cast <bool> (Token.is(MIToken::kw_shufflemask))
 ? void (0) : __assert_fail ("Token.is(MIToken::kw_shufflemask)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2657, __extension__
 __PRETTY_FUNCTION__));

lex();
if (expectAndConsume(MIToken::lparen))
  return error("expected syntax shufflemask(<integer or undef>, ...)");

SmallVector<int, 32> ShufMask;
do {
  if (Token.is(MIToken::kw_undef)) {
    ShufMask.push_back(-1);
  } else if (Token.is(MIToken::IntegerLiteral)) {
    const APSInt &Int = Token.integerValue();
    ShufMask.push_back(Int.getExtValue());
  } else
    return error("expected integer constant");

  lex();
} while (consumeIfPresent(MIToken::comma));

if (expectAndConsume(MIToken::rparen))
  return error("shufflemask should be terminated by ')'.");

ArrayRef<int> MaskAlloc = MF.allocateShuffleMask(ShufMask);
Dest = MachineOperand::CreateShuffleMask(MaskAlloc);
return false;
2682}

2684bool MIParser::parseTargetIndexOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_target_index))(static_cast <bool> (Token.is(MIToken::kw_target_index)
) ? void (0) : __assert_fail ("Token.is(MIToken::kw_target_index)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2685, __extension__
 __PRETTY_FUNCTION__));
lex();
if (expectAndConsume(MIToken::lparen))
  return true;
if (Token.isNot(MIToken::Identifier))
  return error("expected the name of the target index");
int Index = 0;
if (PFS.Target.getTargetIndex(Token.stringValue(), Index))
  return error("use of undefined target index '" + Token.stringValue() + "'");
lex();
if (expectAndConsume(MIToken::rparen))
  return true;
Dest = MachineOperand::CreateTargetIndex(unsigned(Index), /*Offset=*/0);
if (parseOperandsOffset(Dest))
  return true;
return false;
2701}

2703bool MIParser::parseCustomRegisterMaskOperand(MachineOperand &Dest) {
assert(Token.stringValue() == "CustomRegMask" && "Expected a custom RegMask")(static_cast <bool> (Token.stringValue() == "CustomRegMask"
 && "Expected a custom RegMask") ? void (0) : __assert_fail
 ("Token.stringValue() == \"CustomRegMask\" && \"Expected a custom RegMask\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2704, __extension__
 __PRETTY_FUNCTION__));
lex();
if (expectAndConsume(MIToken::lparen))
  return true;

uint32_t *Mask = MF.allocateRegMask();
while (true) {
  if (Token.isNot(MIToken::NamedRegister))
    return error("expected a named register");
  Register Reg;
  if (parseNamedRegister(Reg))
    return true;
  lex();
  Mask[Reg / 32] |= 1U << (Reg % 32);
  // TODO: Report an error if the same register is used more than once.
  if (Token.isNot(MIToken::comma))
    break;
  lex();
}

if (expectAndConsume(MIToken::rparen))
  return true;
Dest = MachineOperand::CreateRegMask(Mask);
return false;
2728}

2730bool MIParser::parseLiveoutRegisterMaskOperand(MachineOperand &Dest) {
assert(Token.is(MIToken::kw_liveout))(static_cast <bool> (Token.is(MIToken::kw_liveout)) ? void
 (0) : __assert_fail ("Token.is(MIToken::kw_liveout)", "llvm/lib/CodeGen/MIRParser/MIParser.cpp"
, 2731, __extension__ __PRETTY_FUNCTION__));
uint32_t *Mask = MF.allocateRegMask();
lex();
if (expectAndConsume(MIToken::lparen))
  return true;
while (true) {
  if (Token.isNot(MIToken::NamedRegister))
    return error("expected a named register");
  Register Reg;
  if (parseNamedRegister(Reg))
    return true;
  lex();
  Mask[Reg / 32] |= 1U << (Reg % 32);
  // TODO: Report an error if the same register is used more than once.
  if (Token.isNot(MIToken::comma))
    break;
  lex();
}
if (expectAndConsume(MIToken::rparen))
  return true;
Dest = MachineOperand::CreateRegLiveOut(Mask);
return false;
2753}

2755bool MIParser::parseMachineOperand(const unsigned OpCode, const unsigned OpIdx,
                                 MachineOperand &Dest,
                                 Optional<unsigned> &TiedDefIdx) {
switch (Token.kind()) {
case MIToken::kw_implicit:
case MIToken::kw_implicit_define:
case MIToken::kw_def:
case MIToken::kw_dead:
case MIToken::kw_killed:
case MIToken::kw_undef:
case MIToken::kw_internal:
case MIToken::kw_early_clobber:
case MIToken::kw_debug_use:
case MIToken::kw_renamable:
case MIToken::underscore:
case MIToken::NamedRegister:
case MIToken::VirtualRegister:
case MIToken::NamedVirtualRegister:
  return parseRegisterOperand(Dest, TiedDefIdx);
case MIToken::IntegerLiteral:
  return parseImmediateOperand(Dest);
case MIToken::kw_half:
case MIToken::kw_float:
case MIToken::kw_double:
case MIToken::kw_x86_fp80:
case MIToken::kw_fp128:
case MIToken::kw_ppc_fp128:
  return parseFPImmediateOperand(Dest);
case MIToken::MachineBasicBlock:
  return parseMBBOperand(Dest);
case MIToken::StackObject:
  return parseStackObjectOperand(Dest);
case MIToken::FixedStackObject:
  return parseFixedStackObjectOperand(Dest);
case MIToken::GlobalValue:
case MIToken::NamedGlobalValue:
  return parseGlobalAddressOperand(Dest);
case MIToken::ConstantPoolItem:
  return parseConstantPoolIndexOperand(Dest);
case MIToken::JumpTableIndex:
  return parseJumpTableIndexOperand(Dest);
case MIToken::ExternalSymbol:
  return parseExternalSymbolOperand(Dest);
case MIToken::MCSymbol:
  return parseMCSymbolOperand(Dest);
case MIToken::SubRegisterIndex:
  return parseSubRegisterIndexOperand(Dest);
case MIToken::md_diexpr:
case MIToken::exclaim:
  return parseMetadataOperand(Dest);
case MIToken::kw_cfi_same_value:
case MIToken::kw_cfi_offset:
case MIToken::kw_cfi_rel_offset:
case MIToken::kw_cfi_def_cfa_register:
case MIToken::kw_cfi_def_cfa_offset:
case MIToken::kw_cfi_adjust_cfa_offset:
case MIToken::kw_cfi_escape:
case MIToken::kw_cfi_def_cfa:
case MIToken::kw_cfi_llvm_def_aspace_cfa:
case MIToken::kw_cfi_register:
case MIToken::kw_cfi_remember_state:
case MIToken::kw_cfi_restore:
case MIToken::kw_cfi_restore_state:
case MIToken::kw_cfi_undefined:
case MIToken::kw_cfi_window_save:
case MIToken::kw_cfi_aarch64_negate_ra_sign_state:
  return parseCFIOperand(Dest);
case MIToken::kw_blockaddress:
  return parseBlockAddressOperand(Dest);
case MIToken::kw_intrinsic:
  return parseIntrinsicOperand(Dest);
case MIToken::kw_target_index:
  return parseTargetIndexOperand(Dest);
case MIToken::kw_liveout:
  return parseLiveoutRegisterMaskOperand(Dest);
case MIToken::kw_floatpred:
case MIToken::kw_intpred:
  return parsePredicateOperand(Dest);
case MIToken::kw_shufflemask:
  return parseShuffleMaskOperand(Dest);
case MIToken::Error:
  return true;
case MIToken::Identifier:
  if (const auto *RegMask = PFS.Target.getRegMask(Token.stringValue())) {
    Dest = MachineOperand::CreateRegMask(RegMask);
    lex();
    break;
  } else if (Token.stringValue() == "CustomRegMask") {
    return parseCustomRegisterMaskOperand(Dest);
  } else
    return parseTypedImmediateOperand(Dest);
case MIToken::dot: {
  const auto *TII = MF.getSubtarget().getInstrInfo();
  if (const auto *Formatter = TII->getMIRFormatter()) {
    return parseTargetImmMnemonic(OpCode, OpIdx, Dest, *Formatter);
  }
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
}
default:
  // FIXME: Parse the MCSymbol machine operand.
  return error("expected a machine operand");
}
return false;
2858}

2860bool MIParser::parseMachineOperandAndTargetFlags(
  const unsigned OpCode, const unsigned OpIdx, MachineOperand &Dest,
  Optional<unsigned> &TiedDefIdx) {
unsigned TF = 0;
bool HasTargetFlags = false;
if (Token.is(MIToken::kw_target_flags)) {
  HasTargetFlags = true;
  lex();
  if (expectAndConsume(MIToken::lparen))
    return true;
  if (Token.isNot(MIToken::Identifier))
    return error("expected the name of the target flag");
  if (PFS.Target.getDirectTargetFlag(Token.stringValue(), TF)) {
    if (PFS.Target.getBitmaskTargetFlag(Token.stringValue(), TF))
      return error("use of undefined target flag '" + Token.stringValue() +
                   "'");
  }
  lex();
  while (Token.is(MIToken::comma)) {
    lex();
    if (Token.isNot(MIToken::Identifier))
      return error("expected the name of the target flag");
    unsigned BitFlag = 0;
    if (PFS.Target.getBitmaskTargetFlag(Token.stringValue(), BitFlag))
      return error("use of undefined target flag '" + Token.stringValue() +
                   "'");
    // TODO: Report an error when using a duplicate bit target flag.
    TF |= BitFlag;
    lex();
  }
  if (expectAndConsume(MIToken::rparen))
    return true;
}
auto Loc = Token.location();
if (parseMachineOperand(OpCode, OpIdx, Dest, TiedDefIdx))
  return true;
if (!HasTargetFlags)
  return false;
if (Dest.isReg())
  return error(Loc, "register operands can't have target flags");
Dest.setTargetFlags(TF);
return false;
2902}

2904bool MIParser::parseOffset(int64_t &Offset) {
if (Token.isNot(MIToken::plus) && Token.isNot(MIToken::minus))
  return false;
StringRef Sign = Token.range();
bool IsNegative = Token.is(MIToken::minus);
lex();
if (Token.isNot(MIToken::IntegerLiteral))
  return error("expected an integer literal after '" + Sign + "'");
if (Token.integerValue().getMinSignedBits() > 64)
  return error("expected 64-bit integer (too large)");
Offset = Token.integerValue().getExtValue();
if (IsNegative)
  Offset = -Offset;
lex();
return false;
2919}

2921bool MIParser::parseAlignment(uint64_t &Alignment) {
assert(Token.is(MIToken::kw_align) || Token.is(MIToken::kw_basealign))(static_cast <bool> (Token.is(MIToken::kw_align) || Token
.is(MIToken::kw_basealign)) ? void (0) : __assert_fail ("Token.is(MIToken::kw_align) || Token.is(MIToken::kw_basealign)"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2922, __extension__
 __PRETTY_FUNCTION__));
lex();
if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
  return error("expected an integer literal after 'align'");
if (getUint64(Alignment))
  return true;
lex();

if (!isPowerOf2_64(Alignment))
  return error("expected a power-of-2 literal after 'align'");

return false;
2934}

2936bool MIParser::parseAddrspace(unsigned &Addrspace) {
assert(Token.is(MIToken::kw_addrspace))(static_cast <bool> (Token.is(MIToken::kw_addrspace)) ?
 void (0) : __assert_fail ("Token.is(MIToken::kw_addrspace)",
 "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2937, __extension__
 __PRETTY_FUNCTION__));
lex();
if (Token.isNot(MIToken::IntegerLiteral) || Token.integerValue().isSigned())
  return error("expected an integer literal after 'addrspace'");
if (getUnsigned(Addrspace))
  return true;
lex();
return false;
2945}

2947bool MIParser::parseOperandsOffset(MachineOperand &Op) {
int64_t Offset = 0;
if (parseOffset(Offset))
  return true;
Op.setOffset(Offset);
return false;
2953}

2955static bool parseIRValue(const MIToken &Token, PerFunctionMIParsingState &PFS,
                       const Value *&V, ErrorCallbackType ErrCB) {
switch (Token.kind()) {
2
←
Control jumps to 'case GlobalValue:'  at line 2970→
case MIToken::NamedIRValue: {
  V = PFS.MF.getFunction().getValueSymbolTable()->lookup(Token.stringValue());
  break;
}
case MIToken::IRValue: {
  unsigned SlotNumber = 0;
  if (getUnsigned(Token, SlotNumber, ErrCB))
    return true;
  V = PFS.getIRValue(SlotNumber);
  break;
}
case MIToken::NamedGlobalValue:
case MIToken::GlobalValue: {
  GlobalValue *GV = nullptr;
  if (parseGlobalValue(Token, PFS, GV, ErrCB))
3
←
Calling 'parseGlobalValue'→
    return true;
  V = GV;
  break;
}
case MIToken::QuotedIRValue: {
  const Constant *C = nullptr;
  if (parseIRConstant(Token.location(), Token.stringValue(), PFS, C, ErrCB))
    return true;
  V = C;
  break;
}
case MIToken::kw_unknown_address:
  V = nullptr;
  return false;
default:
  llvm_unreachable("The current token should be an IR block reference")::llvm::llvm_unreachable_internal("The current token should be an IR block reference"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 2988);
}
if (!V)
  return ErrCB(Token.location(), Twine("use of undefined IR value '") + Token.range() + "'");
return false;
2993}

2995bool MIParser::parseIRValue(const Value *&V) {
return ::parseIRValue(
    Token, PFS, V, [this](StringRef::iterator Loc, const Twine &Msg) -> bool {
      return error(Loc, Msg);
    });
3000}

3002bool MIParser::getUint64(uint64_t &Result) {
if (Token.hasIntegerValue()) {
  if (Token.integerValue().getActiveBits() > 64)
    return error("expected 64-bit integer (too large)");
  Result = Token.integerValue().getZExtValue();
  return false;
}
if (Token.is(MIToken::HexLiteral)) {
  APInt A;
  if (getHexUint(A))
    return true;
  if (A.getBitWidth() > 64)
    return error("expected 64-bit integer (too large)");
  Result = A.getZExtValue();
  return false;
}
return true;
3019}

3021bool MIParser::getHexUint(APInt &Result) {
return ::getHexUint(Token, Result);
3023}

3025bool MIParser::parseMemoryOperandFlag(MachineMemOperand::Flags &Flags) {
const auto OldFlags = Flags;
switch (Token.kind()) {
case MIToken::kw_volatile:
  Flags |= MachineMemOperand::MOVolatile;
  break;
case MIToken::kw_non_temporal:
  Flags |= MachineMemOperand::MONonTemporal;
  break;
case MIToken::kw_dereferenceable:
  Flags |= MachineMemOperand::MODereferenceable;
  break;
case MIToken::kw_invariant:
  Flags |= MachineMemOperand::MOInvariant;
  break;
case MIToken::StringConstant: {
  MachineMemOperand::Flags TF;
  if (PFS.Target.getMMOTargetFlag(Token.stringValue(), TF))
    return error("use of undefined target MMO flag '" + Token.stringValue() +
                 "'");
  Flags |= TF;
  break;
}
default:
  llvm_unreachable("The current token should be a memory operand flag")::llvm::llvm_unreachable_internal("The current token should be a memory operand flag"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 3049);
}
if (OldFlags == Flags)
  // We know that the same flag is specified more than once when the flags
  // weren't modified.
  return error("duplicate '" + Token.stringValue() + "' memory operand flag");
lex();
return false;
3057}

3059bool MIParser::parseMemoryPseudoSourceValue(const PseudoSourceValue *&PSV) {
switch (Token.kind()) {
case MIToken::kw_stack:
  PSV = MF.getPSVManager().getStack();
  break;
case MIToken::kw_got:
  PSV = MF.getPSVManager().getGOT();
  break;
case MIToken::kw_jump_table:
  PSV = MF.getPSVManager().getJumpTable();
  break;
case MIToken::kw_constant_pool:
  PSV = MF.getPSVManager().getConstantPool();
  break;
case MIToken::FixedStackObject: {
  int FI;
  if (parseFixedStackFrameIndex(FI))
    return true;
  PSV = MF.getPSVManager().getFixedStack(FI);
  // The token was already consumed, so use return here instead of break.
  return false;
}
case MIToken::StackObject: {
  int FI;
  if (parseStackFrameIndex(FI))
    return true;
  PSV = MF.getPSVManager().getFixedStack(FI);
  // The token was already consumed, so use return here instead of break.
  return false;
}
case MIToken::kw_call_entry:
  lex();
  switch (Token.kind()) {
  case MIToken::GlobalValue:
  case MIToken::NamedGlobalValue: {
    GlobalValue *GV = nullptr;
    if (parseGlobalValue(GV))
      return true;
    PSV = MF.getPSVManager().getGlobalValueCallEntry(GV);
    break;
  }
  case MIToken::ExternalSymbol:
    PSV = MF.getPSVManager().getExternalSymbolCallEntry(
        MF.createExternalSymbolName(Token.stringValue()));
    break;
  default:
    return error(
        "expected a global value or an external symbol after 'call-entry'");
  }
  break;
case MIToken::kw_custom: {
  lex();
  const auto *TII = MF.getSubtarget().getInstrInfo();
  if (const auto *Formatter = TII->getMIRFormatter()) {
    if (Formatter->parseCustomPseudoSourceValue(
            Token.stringValue(), MF, PFS, PSV,
            [this](StringRef::iterator Loc, const Twine &Msg) -> bool {
              return error(Loc, Msg);
            }))
      return true;
  } else
    return error("unable to parse target custom pseudo source value");
  break;
}
default:
  llvm_unreachable("The current token should be pseudo source value")::llvm::llvm_unreachable_internal("The current token should be pseudo source value"
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 3124);
}
lex();
return false;
3128}

3130bool MIParser::parseMachinePointerInfo(MachinePointerInfo &Dest) {
if (Token.is(MIToken::kw_constant_pool) || Token.is(MIToken::kw_stack) ||
    Token.is(MIToken::kw_got) || Token.is(MIToken::kw_jump_table) ||
    Token.is(MIToken::FixedStackObject) || Token.is(MIToken::StackObject) ||
    Token.is(MIToken::kw_call_entry) || Token.is(MIToken::kw_custom)) {
  const PseudoSourceValue *PSV = nullptr;
  if (parseMemoryPseudoSourceValue(PSV))
    return true;
  int64_t Offset = 0;
  if (parseOffset(Offset))
    return true;
  Dest = MachinePointerInfo(PSV, Offset);
  return false;
}
if (Token.isNot(MIToken::NamedIRValue) && Token.isNot(MIToken::IRValue) &&
    Token.isNot(MIToken::GlobalValue) &&
    Token.isNot(MIToken::NamedGlobalValue) &&
    Token.isNot(MIToken::QuotedIRValue) &&
    Token.isNot(MIToken::kw_unknown_address))
  return error("expected an IR value reference");
const Value *V = nullptr;
if (parseIRValue(V))
  return true;
if (V && !V->getType()->isPointerTy())
  return error("expected a pointer IR value");
lex();
int64_t Offset = 0;
if (parseOffset(Offset))
  return true;
Dest = MachinePointerInfo(V, Offset);
return false;
3161}

3163bool MIParser::parseOptionalScope(LLVMContext &Context,
                                SyncScope::ID &SSID) {
SSID = SyncScope::System;
if (Token.is(MIToken::Identifier) && Token.stringValue() == "syncscope") {
  lex();
  if (expectAndConsume(MIToken::lparen))
    return error("expected '(' in syncscope");

  std::string SSN;
  if (parseStringConstant(SSN))
    return true;

  SSID = Context.getOrInsertSyncScopeID(SSN);
  if (expectAndConsume(MIToken::rparen))
    return error("expected ')' in syncscope");
}

return false;
3181}

3183bool MIParser::parseOptionalAtomicOrdering(AtomicOrdering &Order) {
Order = AtomicOrdering::NotAtomic;
if (Token.isNot(MIToken::Identifier))
  return false;

Order = StringSwitch<AtomicOrdering>(Token.stringValue())
            .Case("unordered", AtomicOrdering::Unordered)
            .Case("monotonic", AtomicOrdering::Monotonic)
            .Case("acquire", AtomicOrdering::Acquire)
            .Case("release", AtomicOrdering::Release)
            .Case("acq_rel", AtomicOrdering::AcquireRelease)
            .Case("seq_cst", AtomicOrdering::SequentiallyConsistent)
            .Default(AtomicOrdering::NotAtomic);

if (Order != AtomicOrdering::NotAtomic) {
  lex();
  return false;
}

return error("expected an atomic scope, ordering or a size specification");
3203}

3205bool MIParser::parseMachineMemoryOperand(MachineMemOperand *&Dest) {
if (expectAndConsume(MIToken::lparen))
  return true;
MachineMemOperand::Flags Flags = MachineMemOperand::MONone;
while (Token.isMemoryOperandFlag()) {
  if (parseMemoryOperandFlag(Flags))
    return true;
}
if (Token.isNot(MIToken::Identifier) ||
    (Token.stringValue() != "load" && Token.stringValue() != "store"))
  return error("expected 'load' or 'store' memory operation");
if (Token.stringValue() == "load")
  Flags |= MachineMemOperand::MOLoad;
else
  Flags |= MachineMemOperand::MOStore;
lex();

// Optional 'store' for operands that both load and store.
if (Token.is(MIToken::Identifier) && Token.stringValue() == "store") {
  Flags |= MachineMemOperand::MOStore;
  lex();
}

// Optional synchronization scope.
SyncScope::ID SSID;
if (parseOptionalScope(MF.getFunction().getContext(), SSID))
  return true;

// Up to two atomic orderings (cmpxchg provides guarantees on failure).
AtomicOrdering Order, FailureOrder;
if (parseOptionalAtomicOrdering(Order))
  return true;

if (parseOptionalAtomicOrdering(FailureOrder))
  return true;

LLT MemoryType;
if (Token.isNot(MIToken::IntegerLiteral) &&
    Token.isNot(MIToken::kw_unknown_size) &&
    Token.isNot(MIToken::lparen))
  return error("expected memory LLT, the size integer literal or 'unknown-size' after "
               "memory operation");

uint64_t Size = MemoryLocation::UnknownSize;
if (Token.is(MIToken::IntegerLiteral)) {
  if (getUint64(Size))
    return true;

  // Convert from bytes to bits for storage.
  MemoryType = LLT::scalar(8 * Size);
  lex();
} else if (Token.is(MIToken::kw_unknown_size)) {
  Size = MemoryLocation::UnknownSize;
  lex();
} else {
  if (expectAndConsume(MIToken::lparen))
    return true;
  if (parseLowLevelType(Token.location(), MemoryType))
    return true;
  if (expectAndConsume(MIToken::rparen))
    return true;

  Size = MemoryType.getSizeInBytes();
}

MachinePointerInfo Ptr = MachinePointerInfo();
if (Token.is(MIToken::Identifier)) {
  const char *Word =
      ((Flags & MachineMemOperand::MOLoad) &&
       (Flags & MachineMemOperand::MOStore))
          ? "on"
          : Flags & MachineMemOperand::MOLoad ? "from" : "into";
  if (Token.stringValue() != Word)
    return error(Twine("expected '") + Word + "'");
  lex();

  if (parseMachinePointerInfo(Ptr))
    return true;
}
uint64_t BaseAlignment =
    (Size != MemoryLocation::UnknownSize ? PowerOf2Ceil(Size) : 1);
AAMDNodes AAInfo;
MDNode *Range = nullptr;
while (consumeIfPresent(MIToken::comma)) {
  switch (Token.kind()) {
  case MIToken::kw_align: {
    // align is printed if it is different than size.
    uint64_t Alignment;
    if (parseAlignment(Alignment))
      return true;
    if (Ptr.Offset & (Alignment - 1)) {
      // MachineMemOperand::getAlign never returns a value greater than the
      // alignment of offset, so this just guards against hand-written MIR
      // that specifies a large "align" value when it should probably use
      // "basealign" instead.
      return error("specified alignment is more aligned than offset");
    }
    BaseAlignment = Alignment;
    break;
  }
  case MIToken::kw_basealign:
    // basealign is printed if it is different than align.
    if (parseAlignment(BaseAlignment))
      return true;
    break;
  case MIToken::kw_addrspace:
    if (parseAddrspace(Ptr.AddrSpace))
      return true;
    break;
  case MIToken::md_tbaa:
    lex();
    if (parseMDNode(AAInfo.TBAA))
      return true;
    break;
  case MIToken::md_alias_scope:
    lex();
    if (parseMDNode(AAInfo.Scope))
      return true;
    break;
  case MIToken::md_noalias:
    lex();
    if (parseMDNode(AAInfo.NoAlias))
      return true;
    break;
  case MIToken::md_range:
    lex();
    if (parseMDNode(Range))
      return true;
    break;
  // TODO: Report an error on duplicate metadata nodes.
  default:
    return error("expected 'align' or '!tbaa' or '!alias.scope' or "
                 "'!noalias' or '!range'");
  }
}
if (expectAndConsume(MIToken::rparen))
  return true;
Dest = MF.getMachineMemOperand(Ptr, Flags, MemoryType, Align(BaseAlignment),
                               AAInfo, Range, SSID, Order, FailureOrder);
return false;
3345}

3347bool MIParser::parsePreOrPostInstrSymbol(MCSymbol *&Symbol) {
assert((Token.is(MIToken::kw_pre_instr_symbol) ||(static_cast <bool> ((Token.is(MIToken::kw_pre_instr_symbol
) || Token.is(MIToken::kw_post_instr_symbol)) && "Invalid token for a pre- post-instruction symbol!"
) ? void (0) : __assert_fail ("(Token.is(MIToken::kw_pre_instr_symbol) || Token.is(MIToken::kw_post_instr_symbol)) && \"Invalid token for a pre- post-instruction symbol!\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 3350, __extension__
 __PRETTY_FUNCTION__))
        Token.is(MIToken::kw_post_instr_symbol)) &&(static_cast <bool> ((Token.is(MIToken::kw_pre_instr_symbol
) || Token.is(MIToken::kw_post_instr_symbol)) && "Invalid token for a pre- post-instruction symbol!"
) ? void (0) : __assert_fail ("(Token.is(MIToken::kw_pre_instr_symbol) || Token.is(MIToken::kw_post_instr_symbol)) && \"Invalid token for a pre- post-instruction symbol!\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 3350, __extension__
 __PRETTY_FUNCTION__))
       "Invalid token for a pre- post-instruction symbol!")(static_cast <bool> ((Token.is(MIToken::kw_pre_instr_symbol
) || Token.is(MIToken::kw_post_instr_symbol)) && "Invalid token for a pre- post-instruction symbol!"
) ? void (0) : __assert_fail ("(Token.is(MIToken::kw_pre_instr_symbol) || Token.is(MIToken::kw_post_instr_symbol)) && \"Invalid token for a pre- post-instruction symbol!\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 3350, __extension__
 __PRETTY_FUNCTION__));
lex();
if (Token.isNot(MIToken::MCSymbol))
  return error("expected a symbol after 'pre-instr-symbol'");
Symbol = getOrCreateMCSymbol(Token.stringValue());
lex();
if (Token.isNewlineOrEOF() || Token.is(MIToken::coloncolon) ||
    Token.is(MIToken::lbrace))
  return false;
if (Token.isNot(MIToken::comma))
  return error("expected ',' before the next machine operand");
lex();
return false;
3363}

3365bool MIParser::parseHeapAllocMarker(MDNode *&Node) {
assert(Token.is(MIToken::kw_heap_alloc_marker) &&(static_cast <bool> (Token.is(MIToken::kw_heap_alloc_marker
) && "Invalid token for a heap alloc marker!") ? void
 (0) : __assert_fail ("Token.is(MIToken::kw_heap_alloc_marker) && \"Invalid token for a heap alloc marker!\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 3367, __extension__
 __PRETTY_FUNCTION__))
       "Invalid token for a heap alloc marker!")(static_cast <bool> (Token.is(MIToken::kw_heap_alloc_marker
) && "Invalid token for a heap alloc marker!") ? void
 (0) : __assert_fail ("Token.is(MIToken::kw_heap_alloc_marker) && \"Invalid token for a heap alloc marker!\""
, "llvm/lib/CodeGen/MIRParser/MIParser.cpp", 3367, __extension__
 __PRETTY_FUNCTION__));
lex();
parseMDNode(Node);
if (!Node)
  return error("expected a MDNode after 'heap-alloc-marker'");
if (Token.isNewlineOrEOF() || Token.is(MIToken::coloncolon) ||
    Token.is(MIToken::lbrace))
  return false;
if (Token.isNot(MIToken::comma))
  return error("expected ',' before the next machine operand");
lex();
return false;
3379}

3381static void initSlots2BasicBlocks(
  const Function &F,
  DenseMap<unsigned, const BasicBlock *> &Slots2BasicBlocks) {
ModuleSlotTracker MST(F.getParent(), /*ShouldInitializeAllMetadata=*/false);
MST.incorporateFunction(F);
for (auto &BB : F) {
  if (BB.hasName())
    continue;
  int Slot = MST.getLocalSlot(&BB);
  if (Slot == -1)
    continue;
  Slots2BasicBlocks.insert(std::make_pair(unsigned(Slot), &BB));
}
3394}

3396static const BasicBlock *getIRBlockFromSlot(
  unsigned Slot,
  const DenseMap<unsigned, const BasicBlock *> &Slots2BasicBlocks) {
return Slots2BasicBlocks.lookup(Slot);
3400}

3402const BasicBlock *MIParser::getIRBlock(unsigned Slot) {
if (Slots2BasicBlocks.empty())
  initSlots2BasicBlocks(MF.getFunction(), Slots2BasicBlocks);
return getIRBlockFromSlot(Slot, Slots2BasicBlocks);
3406}

3408const BasicBlock *MIParser::getIRBlock(unsigned Slot, const Function &F) {
if (&F == &MF.getFunction())
  return getIRBlock(Slot);
DenseMap<unsigned, const BasicBlock *> CustomSlots2BasicBlocks;
initSlots2BasicBlocks(F, CustomSlots2BasicBlocks);
return getIRBlockFromSlot(Slot, CustomSlots2BasicBlocks);
3414}

3416MCSymbol *MIParser::getOrCreateMCSymbol(StringRef Name) {
// FIXME: Currently we can't recognize temporary or local symbols and call all
// of the appropriate forms to create them. However, this handles basic cases
// well as most of the special aspects are recognized by a prefix on their
// name, and the input names should already be unique. For test cases, keeping
// the symbol name out of the symbol table isn't terribly important.
return MF.getContext().getOrCreateSymbol(Name);
3423}

3425bool MIParser::parseStringConstant(std::string &Result) {
if (Token.isNot(MIToken::StringConstant))
  return error("expected string constant");
Result = std::string(Token.stringValue());
lex();
return false;
3431}

3433bool llvm::parseMachineBasicBlockDefinitions(PerFunctionMIParsingState &PFS,
                                           StringRef Src,
                                           SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseBasicBlockDefinitions(PFS.MBBSlots);
3437}

3439bool llvm::parseMachineInstructions(PerFunctionMIParsingState &PFS,
                                  StringRef Src, SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseBasicBlocks();
3442}

3444bool llvm::parseMBBReference(PerFunctionMIParsingState &PFS,
                           MachineBasicBlock *&MBB, StringRef Src,
                           SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseStandaloneMBB(MBB);
3448}

3450bool llvm::parseRegisterReference(PerFunctionMIParsingState &PFS,
                                Register &Reg, StringRef Src,
                                SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseStandaloneRegister(Reg);
3454}

3456bool llvm::parseNamedRegisterReference(PerFunctionMIParsingState &PFS,
                                     Register &Reg, StringRef Src,
                                     SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseStandaloneNamedRegister(Reg);
3460}

3462bool llvm::parseVirtualRegisterReference(PerFunctionMIParsingState &PFS,
                                       VRegInfo *&Info, StringRef Src,
                                       SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseStandaloneVirtualRegister(Info);
3466}

3468bool llvm::parseStackObjectReference(PerFunctionMIParsingState &PFS,
                                   int &FI, StringRef Src,
                                   SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseStandaloneStackObject(FI);
3472}

3474bool llvm::parseMDNode(PerFunctionMIParsingState &PFS,
                     MDNode *&Node, StringRef Src, SMDiagnostic &Error) {
return MIParser(PFS, Error, Src).parseStandaloneMDNode(Node);
3477}

3479bool llvm::parseMachineMetadata(PerFunctionMIParsingState &PFS, StringRef Src,
                              SMRange SrcRange, SMDiagnostic &Error) {
return MIParser(PFS, Error, Src, SrcRange).parseMachineMetadata();
3482}

3484bool MIRFormatter::parseIRValue(StringRef Src, MachineFunction &MF,
                              PerFunctionMIParsingState &PFS, const Value *&V,
                              ErrorCallbackType ErrorCallback) {
MIToken Token;
Src = lexMIToken(Src, Token, [&](StringRef::iterator Loc, const Twine &Msg) {
  ErrorCallback(Loc, Msg);
});
V = nullptr;

return ::parseIRValue(Token, PFS, V, ErrorCallback);
1
Calling 'parseIRValue'→
3494}