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//===-- LLParser.h - Parser Class -------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// This file defines the parser class for .ll files.
#include "LLLexer.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/FMF.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/Support/ModRef.h"
#include <map>
#include <optional>
namespace llvm {
class Module;
class ConstantRange;
class FunctionType;
class GlobalObject;
class SMDiagnostic;
class SMLoc;
class SourceMgr;
class Type;
struct MaybeAlign;
class Function;
class Value;
class BasicBlock;
class Instruction;
class Constant;
class GlobalValue;
class Comdat;
class MDString;
class MDNode;
struct SlotMapping;
/// ValID - Represents a reference of a definition of some sort with no type.
/// There are several cases where we have to parse the value but where the
/// type can depend on later context. This may either be a numeric reference
/// or a symbolic (%var) reference. This is just a discriminated union.
struct ValID {
enum {
t_LocalID, t_GlobalID, // ID in UIntVal.
t_LocalName, t_GlobalName, // Name in StrVal.
t_APSInt, t_APFloat, // Value in APSIntVal/APFloatVal.
t_Null, t_Undef, t_Zero, t_None, t_Poison, // No value.
t_EmptyArray, // No value: []
t_Constant, // Value in ConstantVal.
t_InlineAsm, // Value in FTy/StrVal/StrVal2/UIntVal.
t_ConstantStruct, // Value in ConstantStructElts.
t_PackedConstantStruct // Value in ConstantStructElts.
} Kind = t_LocalID;
LLLexer::LocTy Loc;
unsigned UIntVal;
FunctionType *FTy = nullptr;
std::string StrVal, StrVal2;
APFloat APFloatVal{0.0};
Constant *ConstantVal;
std::unique_ptr<Constant *[]> ConstantStructElts;
bool NoCFI = false;
ValID() = default;
ValID(const ValID &RHS)
: Kind(RHS.Kind), Loc(RHS.Loc), UIntVal(RHS.UIntVal), FTy(RHS.FTy),
StrVal(RHS.StrVal), StrVal2(RHS.StrVal2), APSIntVal(RHS.APSIntVal),
APFloatVal(RHS.APFloatVal), ConstantVal(RHS.ConstantVal),
bool operator<(const ValID &RHS) const {
assert(Kind == RHS.Kind && "Comparing ValIDs of different kinds");
if (Kind == t_LocalID || Kind == t_GlobalID)
return UIntVal < RHS.UIntVal;
assert((Kind == t_LocalName || Kind == t_GlobalName ||
Kind == t_ConstantStruct || Kind == t_PackedConstantStruct) &&
"Ordering not defined for this ValID kind yet");
return StrVal < RHS.StrVal;
class LLParser {
typedef LLLexer::LocTy LocTy;
LLVMContext &Context;
// Lexer to determine whether to use opaque pointers or not.
LLLexer OPLex;
LLLexer Lex;
// Module being parsed, null if we are only parsing summary index.
Module *M;
// Summary index being parsed, null if we are only parsing Module.
ModuleSummaryIndex *Index;
SlotMapping *Slots;
SmallVector<Instruction*, 64> InstsWithTBAATag;
/// DIAssignID metadata does not support temporary RAUW so we cannot use
/// the normal metadata forward reference resolution method. Instead,
/// non-temporary DIAssignID are attached to instructions (recorded here)
/// then replaced later.
DenseMap<MDNode *, SmallVector<Instruction *, 2>> TempDIAssignIDAttachments;
// Type resolution handling data structures. The location is set when we
// have processed a use of the type but not a definition yet.
StringMap<std::pair<Type*, LocTy> > NamedTypes;
std::map<unsigned, std::pair<Type*, LocTy> > NumberedTypes;
std::map<unsigned, TrackingMDNodeRef> NumberedMetadata;
std::map<unsigned, std::pair<TempMDTuple, LocTy>> ForwardRefMDNodes;
// Global Value reference information.
std::map<std::string, std::pair<GlobalValue*, LocTy> > ForwardRefVals;
std::map<unsigned, std::pair<GlobalValue*, LocTy> > ForwardRefValIDs;
std::vector<GlobalValue*> NumberedVals;
// Comdat forward reference information.
std::map<std::string, LocTy> ForwardRefComdats;
// References to blockaddress. The key is the function ValID, the value is
// a list of references to blocks in that function.
std::map<ValID, std::map<ValID, GlobalValue *>> ForwardRefBlockAddresses;
class PerFunctionState;
/// Reference to per-function state to allow basic blocks to be
/// forward-referenced by blockaddress instructions within the same
/// function.
PerFunctionState *BlockAddressPFS;
// References to dso_local_equivalent. The key is the global's ValID, the
// value is a placeholder value that will be replaced. Note there are two
// maps for tracking ValIDs that are GlobalNames and ValIDs that are
// GlobalIDs. These are needed because "operator<" doesn't discriminate
// between the two.
std::map<ValID, GlobalValue *> ForwardRefDSOLocalEquivalentNames;
std::map<ValID, GlobalValue *> ForwardRefDSOLocalEquivalentIDs;
// Attribute builder reference information.
std::map<Value*, std::vector<unsigned> > ForwardRefAttrGroups;
std::map<unsigned, AttrBuilder> NumberedAttrBuilders;
// Summary global value reference information.
std::map<unsigned, std::vector<std::pair<ValueInfo *, LocTy>>>
std::map<unsigned, std::vector<std::pair<AliasSummary *, LocTy>>>
std::vector<ValueInfo> NumberedValueInfos;
// Summary type id reference information.
std::map<unsigned, std::vector<std::pair<GlobalValue::GUID *, LocTy>>>
// Map of module ID to path.
std::map<unsigned, StringRef> ModuleIdMap;
/// Only the llvm-as tool may set this to false to bypass
/// UpgradeDebuginfo so it can generate broken bitcode.
bool UpgradeDebugInfo;
std::string SourceFileName;
LLParser(StringRef F, SourceMgr &SM, SMDiagnostic &Err, Module *M,
ModuleSummaryIndex *Index, LLVMContext &Context,
SlotMapping *Slots = nullptr)
: Context(Context), OPLex(F, SM, Err, Context),
Lex(F, SM, Err, Context), M(M), Index(Index), Slots(Slots),
BlockAddressPFS(nullptr) {}
bool Run(
bool UpgradeDebugInfo,
DataLayoutCallbackTy DataLayoutCallback = [](StringRef, StringRef) {
return std::nullopt;
bool parseStandaloneConstantValue(Constant *&C, const SlotMapping *Slots);
bool parseTypeAtBeginning(Type *&Ty, unsigned &Read,
const SlotMapping *Slots);
LLVMContext &getContext() { return Context; }
bool error(LocTy L, const Twine &Msg) const { return Lex.Error(L, Msg); }
bool tokError(const Twine &Msg) const { return error(Lex.getLoc(), Msg); }
/// Restore the internal name and slot mappings using the mappings that
/// were created at an earlier parsing stage.
void restoreParsingState(const SlotMapping *Slots);
/// getGlobalVal - Get a value with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// exists but does not have the right type.
GlobalValue *getGlobalVal(const std::string &N, Type *Ty, LocTy Loc);
GlobalValue *getGlobalVal(unsigned ID, Type *Ty, LocTy Loc);
/// Get a Comdat with the specified name, creating a forward reference
/// record if needed.
Comdat *getComdat(const std::string &Name, LocTy Loc);
// Helper Routines.
bool parseToken(lltok::Kind T, const char *ErrMsg);
bool EatIfPresent(lltok::Kind T) {
if (Lex.getKind() != T) return false;
return true;
FastMathFlags EatFastMathFlagsIfPresent() {
FastMathFlags FMF;
while (true)
switch (Lex.getKind()) {
case lltok::kw_fast: FMF.setFast(); Lex.Lex(); continue;
case lltok::kw_nnan: FMF.setNoNaNs(); Lex.Lex(); continue;
case lltok::kw_ninf: FMF.setNoInfs(); Lex.Lex(); continue;
case lltok::kw_nsz: FMF.setNoSignedZeros(); Lex.Lex(); continue;
case lltok::kw_arcp: FMF.setAllowReciprocal(); Lex.Lex(); continue;
case lltok::kw_contract:
case lltok::kw_reassoc: FMF.setAllowReassoc(); Lex.Lex(); continue;
case lltok::kw_afn: FMF.setApproxFunc(); Lex.Lex(); continue;
default: return FMF;
return FMF;
bool parseOptionalToken(lltok::Kind T, bool &Present,
LocTy *Loc = nullptr) {
if (Lex.getKind() != T) {
Present = false;
} else {
if (Loc)
*Loc = Lex.getLoc();
Present = true;
return false;
bool parseStringConstant(std::string &Result);
bool parseUInt32(unsigned &Val);
bool parseUInt32(unsigned &Val, LocTy &Loc) {
Loc = Lex.getLoc();
return parseUInt32(Val);
bool parseUInt64(uint64_t &Val);
bool parseUInt64(uint64_t &Val, LocTy &Loc) {
Loc = Lex.getLoc();
return parseUInt64(Val);
bool parseFlag(unsigned &Val);
bool parseStringAttribute(AttrBuilder &B);
bool parseTLSModel(GlobalVariable::ThreadLocalMode &TLM);
bool parseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM);
bool parseOptionalUnnamedAddr(GlobalVariable::UnnamedAddr &UnnamedAddr);
bool parseOptionalAddrSpace(unsigned &AddrSpace, unsigned DefaultAS = 0);
bool parseOptionalProgramAddrSpace(unsigned &AddrSpace) {
return parseOptionalAddrSpace(
AddrSpace, M->getDataLayout().getProgramAddressSpace());
bool parseEnumAttribute(Attribute::AttrKind Attr, AttrBuilder &B,
bool InAttrGroup);
bool parseOptionalParamOrReturnAttrs(AttrBuilder &B, bool IsParam);
bool parseOptionalParamAttrs(AttrBuilder &B) {
return parseOptionalParamOrReturnAttrs(B, true);
bool parseOptionalReturnAttrs(AttrBuilder &B) {
return parseOptionalParamOrReturnAttrs(B, false);
bool parseOptionalLinkage(unsigned &Res, bool &HasLinkage,
unsigned &Visibility, unsigned &DLLStorageClass,
bool &DSOLocal);
void parseOptionalDSOLocal(bool &DSOLocal);
void parseOptionalVisibility(unsigned &Res);
void parseOptionalDLLStorageClass(unsigned &Res);
bool parseOptionalCallingConv(unsigned &CC);
bool parseOptionalAlignment(MaybeAlign &Alignment,
bool AllowParens = false);
bool parseOptionalDerefAttrBytes(lltok::Kind AttrKind, uint64_t &Bytes);
bool parseOptionalUWTableKind(UWTableKind &Kind);
bool parseAllocKind(AllocFnKind &Kind);
std::optional<MemoryEffects> parseMemoryAttr();
unsigned parseNoFPClassAttr();
bool parseScopeAndOrdering(bool IsAtomic, SyncScope::ID &SSID,
AtomicOrdering &Ordering);
bool parseScope(SyncScope::ID &SSID);
bool parseOrdering(AtomicOrdering &Ordering);
bool parseOptionalStackAlignment(unsigned &Alignment);
bool parseOptionalCommaAlign(MaybeAlign &Alignment, bool &AteExtraComma);
bool parseOptionalCommaAddrSpace(unsigned &AddrSpace, LocTy &Loc,
bool &AteExtraComma);
bool parseAllocSizeArguments(unsigned &BaseSizeArg,
std::optional<unsigned> &HowManyArg);
bool parseVScaleRangeArguments(unsigned &MinValue, unsigned &MaxValue);
bool parseIndexList(SmallVectorImpl<unsigned> &Indices,
bool &AteExtraComma);
bool parseIndexList(SmallVectorImpl<unsigned> &Indices) {
bool AteExtraComma;
if (parseIndexList(Indices, AteExtraComma))
return true;
if (AteExtraComma)
return tokError("expected index");
return false;
// Top-Level Entities
bool parseTopLevelEntities();
bool validateEndOfModule(bool UpgradeDebugInfo);
bool validateEndOfIndex();
bool parseTargetDefinitions(DataLayoutCallbackTy DataLayoutCallback);
bool parseTargetDefinition(std::string &TentativeDLStr, LocTy &DLStrLoc);
bool parseModuleAsm();
bool parseSourceFileName();
bool parseUnnamedType();
bool parseNamedType();
bool parseDeclare();
bool parseDefine();
bool parseGlobalType(bool &IsConstant);
bool parseUnnamedGlobal();
bool parseNamedGlobal();
bool parseGlobal(const std::string &Name, LocTy NameLoc, unsigned Linkage,
bool HasLinkage, unsigned Visibility,
unsigned DLLStorageClass, bool DSOLocal,
GlobalVariable::ThreadLocalMode TLM,
GlobalVariable::UnnamedAddr UnnamedAddr);
bool parseAliasOrIFunc(const std::string &Name, LocTy NameLoc, unsigned L,
unsigned Visibility, unsigned DLLStorageClass,
bool DSOLocal, GlobalVariable::ThreadLocalMode TLM,
GlobalVariable::UnnamedAddr UnnamedAddr);
bool parseComdat();
bool parseStandaloneMetadata();
bool parseNamedMetadata();
bool parseMDString(MDString *&Result);
bool parseMDNodeID(MDNode *&Result);
bool parseUnnamedAttrGrp();
bool parseFnAttributeValuePairs(AttrBuilder &B,
std::vector<unsigned> &FwdRefAttrGrps,
bool inAttrGrp, LocTy &BuiltinLoc);
bool parseRequiredTypeAttr(AttrBuilder &B, lltok::Kind AttrToken,
Attribute::AttrKind AttrKind);
// Module Summary Index Parsing.
bool skipModuleSummaryEntry();
bool parseSummaryEntry();
bool parseModuleEntry(unsigned ID);
bool parseModuleReference(StringRef &ModulePath);
bool parseGVReference(ValueInfo &VI, unsigned &GVId);
bool parseSummaryIndexFlags();
bool parseBlockCount();
bool parseGVEntry(unsigned ID);
bool parseFunctionSummary(std::string Name, GlobalValue::GUID, unsigned ID);
bool parseVariableSummary(std::string Name, GlobalValue::GUID, unsigned ID);
bool parseAliasSummary(std::string Name, GlobalValue::GUID, unsigned ID);
bool parseGVFlags(GlobalValueSummary::GVFlags &GVFlags);
bool parseGVarFlags(GlobalVarSummary::GVarFlags &GVarFlags);
bool parseOptionalFFlags(FunctionSummary::FFlags &FFlags);
bool parseOptionalCalls(std::vector<FunctionSummary::EdgeTy> &Calls);
bool parseHotness(CalleeInfo::HotnessType &Hotness);
bool parseOptionalTypeIdInfo(FunctionSummary::TypeIdInfo &TypeIdInfo);
bool parseTypeTests(std::vector<GlobalValue::GUID> &TypeTests);
bool parseVFuncIdList(lltok::Kind Kind,
std::vector<FunctionSummary::VFuncId> &VFuncIdList);
bool parseConstVCallList(
lltok::Kind Kind,
std::vector<FunctionSummary::ConstVCall> &ConstVCallList);
using IdToIndexMapType =
std::map<unsigned, std::vector<std::pair<unsigned, LocTy>>>;
bool parseConstVCall(FunctionSummary::ConstVCall &ConstVCall,
IdToIndexMapType &IdToIndexMap, unsigned Index);
bool parseVFuncId(FunctionSummary::VFuncId &VFuncId,
IdToIndexMapType &IdToIndexMap, unsigned Index);
bool parseOptionalVTableFuncs(VTableFuncList &VTableFuncs);
bool parseOptionalParamAccesses(
std::vector<FunctionSummary::ParamAccess> &Params);
bool parseParamNo(uint64_t &ParamNo);
using IdLocListType = std::vector<std::pair<unsigned, LocTy>>;
bool parseParamAccess(FunctionSummary::ParamAccess &Param,
IdLocListType &IdLocList);
bool parseParamAccessCall(FunctionSummary::ParamAccess::Call &Call,
IdLocListType &IdLocList);
bool parseParamAccessOffset(ConstantRange &Range);
bool parseOptionalRefs(std::vector<ValueInfo> &Refs);
bool parseTypeIdEntry(unsigned ID);
bool parseTypeIdSummary(TypeIdSummary &TIS);
bool parseTypeIdCompatibleVtableEntry(unsigned ID);
bool parseTypeTestResolution(TypeTestResolution &TTRes);
bool parseOptionalWpdResolutions(
std::map<uint64_t, WholeProgramDevirtResolution> &WPDResMap);
bool parseWpdRes(WholeProgramDevirtResolution &WPDRes);
bool parseOptionalResByArg(
std::map<std::vector<uint64_t>, WholeProgramDevirtResolution::ByArg>
bool parseArgs(std::vector<uint64_t> &Args);
void addGlobalValueToIndex(std::string Name, GlobalValue::GUID,
GlobalValue::LinkageTypes Linkage, unsigned ID,
std::unique_ptr<GlobalValueSummary> Summary);
bool parseOptionalAllocs(std::vector<AllocInfo> &Allocs);
bool parseMemProfs(std::vector<MIBInfo> &MIBs);
bool parseAllocType(uint8_t &AllocType);
bool parseOptionalCallsites(std::vector<CallsiteInfo> &Callsites);
// Type Parsing.
bool parseType(Type *&Result, const Twine &Msg, bool AllowVoid = false);
bool parseType(Type *&Result, bool AllowVoid = false) {
return parseType(Result, "expected type", AllowVoid);
bool parseType(Type *&Result, const Twine &Msg, LocTy &Loc,
bool AllowVoid = false) {
Loc = Lex.getLoc();
return parseType(Result, Msg, AllowVoid);
bool parseType(Type *&Result, LocTy &Loc, bool AllowVoid = false) {
Loc = Lex.getLoc();
return parseType(Result, AllowVoid);
bool parseAnonStructType(Type *&Result, bool Packed);
bool parseStructBody(SmallVectorImpl<Type *> &Body);
bool parseStructDefinition(SMLoc TypeLoc, StringRef Name,
std::pair<Type *, LocTy> &Entry,
Type *&ResultTy);
bool parseArrayVectorType(Type *&Result, bool IsVector);
bool parseFunctionType(Type *&Result);
bool parseTargetExtType(Type *&Result);
// Function Semantic Analysis.
class PerFunctionState {
LLParser &P;
Function &F;
std::map<std::string, std::pair<Value*, LocTy> > ForwardRefVals;
std::map<unsigned, std::pair<Value*, LocTy> > ForwardRefValIDs;
std::vector<Value*> NumberedVals;
/// FunctionNumber - If this is an unnamed function, this is the slot
/// number of it, otherwise it is -1.
int FunctionNumber;
PerFunctionState(LLParser &p, Function &f, int functionNumber);
Function &getFunction() const { return F; }
bool finishFunction();
/// GetVal - Get a value with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// exists but does not have the right type.
Value *getVal(const std::string &Name, Type *Ty, LocTy Loc);
Value *getVal(unsigned ID, Type *Ty, LocTy Loc);
/// setInstName - After an instruction is parsed and inserted into its
/// basic block, this installs its name.
bool setInstName(int NameID, const std::string &NameStr, LocTy NameLoc,
Instruction *Inst);
/// GetBB - Get a basic block with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value
/// is not a BasicBlock.
BasicBlock *getBB(const std::string &Name, LocTy Loc);
BasicBlock *getBB(unsigned ID, LocTy Loc);
/// DefineBB - Define the specified basic block, which is either named or
/// unnamed. If there is an error, this returns null otherwise it returns
/// the block being defined.
BasicBlock *defineBB(const std::string &Name, int NameID, LocTy Loc);
bool resolveForwardRefBlockAddresses();
bool convertValIDToValue(Type *Ty, ValID &ID, Value *&V,
PerFunctionState *PFS);
Value *checkValidVariableType(LocTy Loc, const Twine &Name, Type *Ty,
Value *Val);
bool parseConstantValue(Type *Ty, Constant *&C);
bool parseValue(Type *Ty, Value *&V, PerFunctionState *PFS);
bool parseValue(Type *Ty, Value *&V, PerFunctionState &PFS) {
return parseValue(Ty, V, &PFS);
bool parseValue(Type *Ty, Value *&V, LocTy &Loc, PerFunctionState &PFS) {
Loc = Lex.getLoc();
return parseValue(Ty, V, &PFS);
bool parseTypeAndValue(Value *&V, PerFunctionState *PFS);
bool parseTypeAndValue(Value *&V, PerFunctionState &PFS) {
return parseTypeAndValue(V, &PFS);
bool parseTypeAndValue(Value *&V, LocTy &Loc, PerFunctionState &PFS) {
Loc = Lex.getLoc();
return parseTypeAndValue(V, PFS);
bool parseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
PerFunctionState &PFS);
bool parseTypeAndBasicBlock(BasicBlock *&BB, PerFunctionState &PFS) {
LocTy Loc;
return parseTypeAndBasicBlock(BB, Loc, PFS);
struct ParamInfo {
LocTy Loc;
Value *V;
AttributeSet Attrs;
ParamInfo(LocTy loc, Value *v, AttributeSet attrs)
: Loc(loc), V(v), Attrs(attrs) {}
bool parseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
PerFunctionState &PFS, bool IsMustTailCall = false,
bool InVarArgsFunc = false);
parseOptionalOperandBundles(SmallVectorImpl<OperandBundleDef> &BundleList,
PerFunctionState &PFS);
bool parseExceptionArgs(SmallVectorImpl<Value *> &Args,
PerFunctionState &PFS);
bool resolveFunctionType(Type *RetType,
const SmallVector<ParamInfo, 16> &ArgList,
FunctionType *&FuncTy);
// Constant Parsing.
bool parseValID(ValID &ID, PerFunctionState *PFS,
Type *ExpectedTy = nullptr);
bool parseGlobalValue(Type *Ty, Constant *&C);
bool parseGlobalTypeAndValue(Constant *&V);
bool parseGlobalValueVector(SmallVectorImpl<Constant *> &Elts,
std::optional<unsigned> *InRangeOp = nullptr);
bool parseOptionalComdat(StringRef GlobalName, Comdat *&C);
bool parseSanitizer(GlobalVariable *GV);
bool parseMetadataAsValue(Value *&V, PerFunctionState &PFS);
bool parseValueAsMetadata(Metadata *&MD, const Twine &TypeMsg,
PerFunctionState *PFS);
bool parseMetadata(Metadata *&MD, PerFunctionState *PFS);
bool parseMDTuple(MDNode *&MD, bool IsDistinct = false);
bool parseMDNode(MDNode *&N);
bool parseMDNodeTail(MDNode *&N);
bool parseMDNodeVector(SmallVectorImpl<Metadata *> &Elts);
bool parseMetadataAttachment(unsigned &Kind, MDNode *&MD);
bool parseInstructionMetadata(Instruction &Inst);
bool parseGlobalObjectMetadataAttachment(GlobalObject &GO);
bool parseOptionalFunctionMetadata(Function &F);
template <class FieldTy>
bool parseMDField(LocTy Loc, StringRef Name, FieldTy &Result);
template <class FieldTy> bool parseMDField(StringRef Name, FieldTy &Result);
template <class ParserTy> bool parseMDFieldsImplBody(ParserTy ParseField);
template <class ParserTy>
bool parseMDFieldsImpl(ParserTy ParseField, LocTy &ClosingLoc);
bool parseSpecializedMDNode(MDNode *&N, bool IsDistinct = false);
bool parse##CLASS(MDNode *&Result, bool IsDistinct);
#include "llvm/IR/Metadata.def"
bool parseDIArgList(MDNode *&Result, bool IsDistinct,
PerFunctionState *PFS);
// Function Parsing.
struct ArgInfo {
LocTy Loc;
Type *Ty;
AttributeSet Attrs;
std::string Name;
ArgInfo(LocTy L, Type *ty, AttributeSet Attr, const std::string &N)
: Loc(L), Ty(ty), Attrs(Attr), Name(N) {}
bool parseArgumentList(SmallVectorImpl<ArgInfo> &ArgList, bool &IsVarArg);
bool parseFunctionHeader(Function *&Fn, bool IsDefine);
bool parseFunctionBody(Function &Fn);
bool parseBasicBlock(PerFunctionState &PFS);
enum TailCallType { TCT_None, TCT_Tail, TCT_MustTail };
// Instruction Parsing. Each instruction parsing routine can return with a
// normal result, an error result, or return having eaten an extra comma.
enum InstResult { InstNormal = 0, InstError = 1, InstExtraComma = 2 };
int parseInstruction(Instruction *&Inst, BasicBlock *BB,
PerFunctionState &PFS);
bool parseCmpPredicate(unsigned &P, unsigned Opc);
bool parseRet(Instruction *&Inst, BasicBlock *BB, PerFunctionState &PFS);
bool parseBr(Instruction *&Inst, PerFunctionState &PFS);
bool parseSwitch(Instruction *&Inst, PerFunctionState &PFS);
bool parseIndirectBr(Instruction *&Inst, PerFunctionState &PFS);
bool parseInvoke(Instruction *&Inst, PerFunctionState &PFS);
bool parseResume(Instruction *&Inst, PerFunctionState &PFS);
bool parseCleanupRet(Instruction *&Inst, PerFunctionState &PFS);
bool parseCatchRet(Instruction *&Inst, PerFunctionState &PFS);
bool parseCatchSwitch(Instruction *&Inst, PerFunctionState &PFS);
bool parseCatchPad(Instruction *&Inst, PerFunctionState &PFS);
bool parseCleanupPad(Instruction *&Inst, PerFunctionState &PFS);
bool parseCallBr(Instruction *&Inst, PerFunctionState &PFS);
bool parseUnaryOp(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc,
bool IsFP);
bool parseArithmetic(Instruction *&Inst, PerFunctionState &PFS,
unsigned Opc, bool IsFP);
bool parseLogical(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc);
bool parseCompare(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc);
bool parseCast(Instruction *&Inst, PerFunctionState &PFS, unsigned Opc);
bool parseSelect(Instruction *&Inst, PerFunctionState &PFS);
bool parseVAArg(Instruction *&Inst, PerFunctionState &PFS);
bool parseExtractElement(Instruction *&Inst, PerFunctionState &PFS);
bool parseInsertElement(Instruction *&Inst, PerFunctionState &PFS);
bool parseShuffleVector(Instruction *&Inst, PerFunctionState &PFS);
int parsePHI(Instruction *&Inst, PerFunctionState &PFS);
bool parseLandingPad(Instruction *&Inst, PerFunctionState &PFS);
bool parseCall(Instruction *&Inst, PerFunctionState &PFS,
CallInst::TailCallKind TCK);
int parseAlloc(Instruction *&Inst, PerFunctionState &PFS);
int parseLoad(Instruction *&Inst, PerFunctionState &PFS);
int parseStore(Instruction *&Inst, PerFunctionState &PFS);
int parseCmpXchg(Instruction *&Inst, PerFunctionState &PFS);
int parseAtomicRMW(Instruction *&Inst, PerFunctionState &PFS);
int parseFence(Instruction *&Inst, PerFunctionState &PFS);
int parseGetElementPtr(Instruction *&Inst, PerFunctionState &PFS);
int parseExtractValue(Instruction *&Inst, PerFunctionState &PFS);
int parseInsertValue(Instruction *&Inst, PerFunctionState &PFS);
bool parseFreeze(Instruction *&I, PerFunctionState &PFS);
// Use-list order directives.
bool parseUseListOrder(PerFunctionState *PFS = nullptr);
bool parseUseListOrderBB();
bool parseUseListOrderIndexes(SmallVectorImpl<unsigned> &Indexes);
bool sortUseListOrder(Value *V, ArrayRef<unsigned> Indexes, SMLoc Loc);
} // End llvm namespace