[llvm] r232542 - Internalize BitcodeReader. Not used outside of BitcodeReader.cpp.
Rafael Espíndola
rafael.espindola at gmail.com
Wed Mar 18 08:48:10 PDT 2015
Nice!
On 17 March 2015 at 16:40, Benjamin Kramer <benny.kra at googlemail.com> wrote:
> Author: d0k
> Date: Tue Mar 17 15:40:24 2015
> New Revision: 232542
>
> URL: http://llvm.org/viewvc/llvm-project?rev=232542&view=rev
> Log:
> Internalize BitcodeReader. Not used outside of BitcodeReader.cpp.
>
> NFC.
>
> Removed:
> llvm/trunk/lib/Bitcode/Reader/BitcodeReader.h
> Modified:
> llvm/trunk/lib/Bitcode/Reader/BitcodeReader.cpp
>
> Modified: llvm/trunk/lib/Bitcode/Reader/BitcodeReader.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Bitcode/Reader/BitcodeReader.cpp?rev=232542&r1=232541&r2=232542&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Bitcode/Reader/BitcodeReader.cpp (original)
> +++ llvm/trunk/lib/Bitcode/Reader/BitcodeReader.cpp Tue Mar 17 15:40:24 2015
> @@ -8,35 +8,375 @@
> //===----------------------------------------------------------------------===//
>
> #include "llvm/Bitcode/ReaderWriter.h"
> -#include "BitcodeReader.h"
> #include "llvm/ADT/STLExtras.h"
> #include "llvm/ADT/SmallString.h"
> #include "llvm/ADT/SmallVector.h"
> #include "llvm/ADT/Triple.h"
> +#include "llvm/Bitcode/BitstreamReader.h"
> #include "llvm/Bitcode/LLVMBitCodes.h"
> #include "llvm/IR/AutoUpgrade.h"
> #include "llvm/IR/Constants.h"
> #include "llvm/IR/DebugInfoMetadata.h"
> #include "llvm/IR/DerivedTypes.h"
> #include "llvm/IR/DiagnosticPrinter.h"
> +#include "llvm/IR/GVMaterializer.h"
> #include "llvm/IR/InlineAsm.h"
> #include "llvm/IR/IntrinsicInst.h"
> #include "llvm/IR/LLVMContext.h"
> #include "llvm/IR/Module.h"
> #include "llvm/IR/OperandTraits.h"
> #include "llvm/IR/Operator.h"
> +#include "llvm/IR/ValueHandle.h"
> #include "llvm/Support/DataStream.h"
> #include "llvm/Support/ManagedStatic.h"
> #include "llvm/Support/MathExtras.h"
> #include "llvm/Support/MemoryBuffer.h"
> #include "llvm/Support/raw_ostream.h"
> -
> +#include <deque>
> using namespace llvm;
>
> +namespace {
> enum {
> SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
> };
>
> +class BitcodeReaderValueList {
> + std::vector<WeakVH> ValuePtrs;
> +
> + /// ResolveConstants - As we resolve forward-referenced constants, we add
> + /// information about them to this vector. This allows us to resolve them in
> + /// bulk instead of resolving each reference at a time. See the code in
> + /// ResolveConstantForwardRefs for more information about this.
> + ///
> + /// The key of this vector is the placeholder constant, the value is the slot
> + /// number that holds the resolved value.
> + typedef std::vector<std::pair<Constant*, unsigned> > ResolveConstantsTy;
> + ResolveConstantsTy ResolveConstants;
> + LLVMContext &Context;
> +public:
> + BitcodeReaderValueList(LLVMContext &C) : Context(C) {}
> + ~BitcodeReaderValueList() {
> + assert(ResolveConstants.empty() && "Constants not resolved?");
> + }
> +
> + // vector compatibility methods
> + unsigned size() const { return ValuePtrs.size(); }
> + void resize(unsigned N) { ValuePtrs.resize(N); }
> + void push_back(Value *V) {
> + ValuePtrs.push_back(V);
> + }
> +
> + void clear() {
> + assert(ResolveConstants.empty() && "Constants not resolved?");
> + ValuePtrs.clear();
> + }
> +
> + Value *operator[](unsigned i) const {
> + assert(i < ValuePtrs.size());
> + return ValuePtrs[i];
> + }
> +
> + Value *back() const { return ValuePtrs.back(); }
> + void pop_back() { ValuePtrs.pop_back(); }
> + bool empty() const { return ValuePtrs.empty(); }
> + void shrinkTo(unsigned N) {
> + assert(N <= size() && "Invalid shrinkTo request!");
> + ValuePtrs.resize(N);
> + }
> +
> + Constant *getConstantFwdRef(unsigned Idx, Type *Ty);
> + Value *getValueFwdRef(unsigned Idx, Type *Ty);
> +
> + void AssignValue(Value *V, unsigned Idx);
> +
> + /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
> + /// resolves any forward references.
> + void ResolveConstantForwardRefs();
> +};
> +
> +class BitcodeReaderMDValueList {
> + unsigned NumFwdRefs;
> + bool AnyFwdRefs;
> + unsigned MinFwdRef;
> + unsigned MaxFwdRef;
> + std::vector<TrackingMDRef> MDValuePtrs;
> +
> + LLVMContext &Context;
> +public:
> + BitcodeReaderMDValueList(LLVMContext &C)
> + : NumFwdRefs(0), AnyFwdRefs(false), Context(C) {}
> +
> + // vector compatibility methods
> + unsigned size() const { return MDValuePtrs.size(); }
> + void resize(unsigned N) { MDValuePtrs.resize(N); }
> + void push_back(Metadata *MD) { MDValuePtrs.emplace_back(MD); }
> + void clear() { MDValuePtrs.clear(); }
> + Metadata *back() const { return MDValuePtrs.back(); }
> + void pop_back() { MDValuePtrs.pop_back(); }
> + bool empty() const { return MDValuePtrs.empty(); }
> +
> + Metadata *operator[](unsigned i) const {
> + assert(i < MDValuePtrs.size());
> + return MDValuePtrs[i];
> + }
> +
> + void shrinkTo(unsigned N) {
> + assert(N <= size() && "Invalid shrinkTo request!");
> + MDValuePtrs.resize(N);
> + }
> +
> + Metadata *getValueFwdRef(unsigned Idx);
> + void AssignValue(Metadata *MD, unsigned Idx);
> + void tryToResolveCycles();
> +};
> +
> +class BitcodeReader : public GVMaterializer {
> + LLVMContext &Context;
> + DiagnosticHandlerFunction DiagnosticHandler;
> + Module *TheModule;
> + std::unique_ptr<MemoryBuffer> Buffer;
> + std::unique_ptr<BitstreamReader> StreamFile;
> + BitstreamCursor Stream;
> + DataStreamer *LazyStreamer;
> + uint64_t NextUnreadBit;
> + bool SeenValueSymbolTable;
> +
> + std::vector<Type*> TypeList;
> + BitcodeReaderValueList ValueList;
> + BitcodeReaderMDValueList MDValueList;
> + std::vector<Comdat *> ComdatList;
> + SmallVector<Instruction *, 64> InstructionList;
> +
> + std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInits;
> + std::vector<std::pair<GlobalAlias*, unsigned> > AliasInits;
> + std::vector<std::pair<Function*, unsigned> > FunctionPrefixes;
> + std::vector<std::pair<Function*, unsigned> > FunctionPrologues;
> +
> + SmallVector<Instruction*, 64> InstsWithTBAATag;
> +
> + /// MAttributes - The set of attributes by index. Index zero in the
> + /// file is for null, and is thus not represented here. As such all indices
> + /// are off by one.
> + std::vector<AttributeSet> MAttributes;
> +
> + /// \brief The set of attribute groups.
> + std::map<unsigned, AttributeSet> MAttributeGroups;
> +
> + /// FunctionBBs - While parsing a function body, this is a list of the basic
> + /// blocks for the function.
> + std::vector<BasicBlock*> FunctionBBs;
> +
> + // When reading the module header, this list is populated with functions that
> + // have bodies later in the file.
> + std::vector<Function*> FunctionsWithBodies;
> +
> + // When intrinsic functions are encountered which require upgrading they are
> + // stored here with their replacement function.
> + typedef std::vector<std::pair<Function*, Function*> > UpgradedIntrinsicMap;
> + UpgradedIntrinsicMap UpgradedIntrinsics;
> +
> + // Map the bitcode's custom MDKind ID to the Module's MDKind ID.
> + DenseMap<unsigned, unsigned> MDKindMap;
> +
> + // Several operations happen after the module header has been read, but
> + // before function bodies are processed. This keeps track of whether
> + // we've done this yet.
> + bool SeenFirstFunctionBody;
> +
> + /// DeferredFunctionInfo - When function bodies are initially scanned, this
> + /// map contains info about where to find deferred function body in the
> + /// stream.
> + DenseMap<Function*, uint64_t> DeferredFunctionInfo;
> +
> + /// When Metadata block is initially scanned when parsing the module, we may
> + /// choose to defer parsing of the metadata. This vector contains info about
> + /// which Metadata blocks are deferred.
> + std::vector<uint64_t> DeferredMetadataInfo;
> +
> + /// These are basic blocks forward-referenced by block addresses. They are
> + /// inserted lazily into functions when they're loaded. The basic block ID is
> + /// its index into the vector.
> + DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs;
> + std::deque<Function *> BasicBlockFwdRefQueue;
> +
> + /// UseRelativeIDs - Indicates that we are using a new encoding for
> + /// instruction operands where most operands in the current
> + /// FUNCTION_BLOCK are encoded relative to the instruction number,
> + /// for a more compact encoding. Some instruction operands are not
> + /// relative to the instruction ID: basic block numbers, and types.
> + /// Once the old style function blocks have been phased out, we would
> + /// not need this flag.
> + bool UseRelativeIDs;
> +
> + /// True if all functions will be materialized, negating the need to process
> + /// (e.g.) blockaddress forward references.
> + bool WillMaterializeAllForwardRefs;
> +
> + /// Functions that have block addresses taken. This is usually empty.
> + SmallPtrSet<const Function *, 4> BlockAddressesTaken;
> +
> + /// True if any Metadata block has been materialized.
> + bool IsMetadataMaterialized;
> +
> +public:
> + std::error_code Error(BitcodeError E, const Twine &Message);
> + std::error_code Error(BitcodeError E);
> + std::error_code Error(const Twine &Message);
> +
> + explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C,
> + DiagnosticHandlerFunction DiagnosticHandler);
> + explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C,
> + DiagnosticHandlerFunction DiagnosticHandler);
> + ~BitcodeReader() { FreeState(); }
> +
> + std::error_code materializeForwardReferencedFunctions();
> +
> + void FreeState();
> +
> + void releaseBuffer();
> +
> + bool isDematerializable(const GlobalValue *GV) const override;
> + std::error_code materialize(GlobalValue *GV) override;
> + std::error_code MaterializeModule(Module *M) override;
> + std::vector<StructType *> getIdentifiedStructTypes() const override;
> + void Dematerialize(GlobalValue *GV) override;
> +
> + /// @brief Main interface to parsing a bitcode buffer.
> + /// @returns true if an error occurred.
> + std::error_code ParseBitcodeInto(Module *M,
> + bool ShouldLazyLoadMetadata = false);
> +
> + /// @brief Cheap mechanism to just extract module triple
> + /// @returns true if an error occurred.
> + ErrorOr<std::string> parseTriple();
> +
> + static uint64_t decodeSignRotatedValue(uint64_t V);
> +
> + /// Materialize any deferred Metadata block.
> + std::error_code materializeMetadata() override;
> +
> +private:
> + std::vector<StructType *> IdentifiedStructTypes;
> + StructType *createIdentifiedStructType(LLVMContext &Context, StringRef Name);
> + StructType *createIdentifiedStructType(LLVMContext &Context);
> +
> + Type *getTypeByID(unsigned ID);
> + Value *getFnValueByID(unsigned ID, Type *Ty) {
> + if (Ty && Ty->isMetadataTy())
> + return MetadataAsValue::get(Ty->getContext(), getFnMetadataByID(ID));
> + return ValueList.getValueFwdRef(ID, Ty);
> + }
> + Metadata *getFnMetadataByID(unsigned ID) {
> + return MDValueList.getValueFwdRef(ID);
> + }
> + BasicBlock *getBasicBlock(unsigned ID) const {
> + if (ID >= FunctionBBs.size()) return nullptr; // Invalid ID
> + return FunctionBBs[ID];
> + }
> + AttributeSet getAttributes(unsigned i) const {
> + if (i-1 < MAttributes.size())
> + return MAttributes[i-1];
> + return AttributeSet();
> + }
> +
> + /// getValueTypePair - Read a value/type pair out of the specified record from
> + /// slot 'Slot'. Increment Slot past the number of slots used in the record.
> + /// Return true on failure.
> + bool getValueTypePair(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
> + unsigned InstNum, Value *&ResVal) {
> + if (Slot == Record.size()) return true;
> + unsigned ValNo = (unsigned)Record[Slot++];
> + // Adjust the ValNo, if it was encoded relative to the InstNum.
> + if (UseRelativeIDs)
> + ValNo = InstNum - ValNo;
> + if (ValNo < InstNum) {
> + // If this is not a forward reference, just return the value we already
> + // have.
> + ResVal = getFnValueByID(ValNo, nullptr);
> + return ResVal == nullptr;
> + } else if (Slot == Record.size()) {
> + return true;
> + }
> +
> + unsigned TypeNo = (unsigned)Record[Slot++];
> + ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
> + return ResVal == nullptr;
> + }
> +
> + /// popValue - Read a value out of the specified record from slot 'Slot'.
> + /// Increment Slot past the number of slots used by the value in the record.
> + /// Return true if there is an error.
> + bool popValue(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
> + unsigned InstNum, Type *Ty, Value *&ResVal) {
> + if (getValue(Record, Slot, InstNum, Ty, ResVal))
> + return true;
> + // All values currently take a single record slot.
> + ++Slot;
> + return false;
> + }
> +
> + /// getValue -- Like popValue, but does not increment the Slot number.
> + bool getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
> + unsigned InstNum, Type *Ty, Value *&ResVal) {
> + ResVal = getValue(Record, Slot, InstNum, Ty);
> + return ResVal == nullptr;
> + }
> +
> + /// getValue -- Version of getValue that returns ResVal directly,
> + /// or 0 if there is an error.
> + Value *getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
> + unsigned InstNum, Type *Ty) {
> + if (Slot == Record.size()) return nullptr;
> + unsigned ValNo = (unsigned)Record[Slot];
> + // Adjust the ValNo, if it was encoded relative to the InstNum.
> + if (UseRelativeIDs)
> + ValNo = InstNum - ValNo;
> + return getFnValueByID(ValNo, Ty);
> + }
> +
> + /// getValueSigned -- Like getValue, but decodes signed VBRs.
> + Value *getValueSigned(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
> + unsigned InstNum, Type *Ty) {
> + if (Slot == Record.size()) return nullptr;
> + unsigned ValNo = (unsigned)decodeSignRotatedValue(Record[Slot]);
> + // Adjust the ValNo, if it was encoded relative to the InstNum.
> + if (UseRelativeIDs)
> + ValNo = InstNum - ValNo;
> + return getFnValueByID(ValNo, Ty);
> + }
> +
> + /// Converts alignment exponent (i.e. power of two (or zero)) to the
> + /// corresponding alignment to use. If alignment is too large, returns
> + /// a corresponding error code.
> + std::error_code parseAlignmentValue(uint64_t Exponent, unsigned &Alignment);
> + std::error_code ParseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
> + std::error_code ParseModule(bool Resume, bool ShouldLazyLoadMetadata = false);
> + std::error_code ParseAttributeBlock();
> + std::error_code ParseAttributeGroupBlock();
> + std::error_code ParseTypeTable();
> + std::error_code ParseTypeTableBody();
> +
> + std::error_code ParseValueSymbolTable();
> + std::error_code ParseConstants();
> + std::error_code RememberAndSkipFunctionBody();
> + /// Save the positions of the Metadata blocks and skip parsing the blocks.
> + std::error_code rememberAndSkipMetadata();
> + std::error_code ParseFunctionBody(Function *F);
> + std::error_code GlobalCleanup();
> + std::error_code ResolveGlobalAndAliasInits();
> + std::error_code ParseMetadata();
> + std::error_code ParseMetadataAttachment();
> + ErrorOr<std::string> parseModuleTriple();
> + std::error_code ParseUseLists();
> + std::error_code InitStream();
> + std::error_code InitStreamFromBuffer();
> + std::error_code InitLazyStream();
> + std::error_code FindFunctionInStream(
> + Function *F,
> + DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
> +};
> +} // namespace
> +
> BitcodeDiagnosticInfo::BitcodeDiagnosticInfo(std::error_code EC,
> DiagnosticSeverity Severity,
> const Twine &Msg)
>
> Removed: llvm/trunk/lib/Bitcode/Reader/BitcodeReader.h
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Bitcode/Reader/BitcodeReader.h?rev=232541&view=auto
> ==============================================================================
> --- llvm/trunk/lib/Bitcode/Reader/BitcodeReader.h (original)
> +++ llvm/trunk/lib/Bitcode/Reader/BitcodeReader.h (removed)
> @@ -1,383 +0,0 @@
> -//===- BitcodeReader.h - Internal BitcodeReader impl ------------*- C++ -*-===//
> -//
> -// The LLVM Compiler Infrastructure
> -//
> -// This file is distributed under the University of Illinois Open Source
> -// License. See LICENSE.TXT for details.
> -//
> -//===----------------------------------------------------------------------===//
> -//
> -// This header defines the BitcodeReader class.
> -//
> -//===----------------------------------------------------------------------===//
> -
> -#ifndef LLVM_LIB_BITCODE_READER_BITCODEREADER_H
> -#define LLVM_LIB_BITCODE_READER_BITCODEREADER_H
> -
> -#include "llvm/ADT/DenseMap.h"
> -#include "llvm/Bitcode/BitstreamReader.h"
> -#include "llvm/Bitcode/LLVMBitCodes.h"
> -#include "llvm/IR/Attributes.h"
> -#include "llvm/IR/GVMaterializer.h"
> -#include "llvm/IR/Metadata.h"
> -#include "llvm/IR/OperandTraits.h"
> -#include "llvm/IR/TrackingMDRef.h"
> -#include "llvm/IR/Type.h"
> -#include "llvm/IR/ValueHandle.h"
> -#include <deque>
> -#include <system_error>
> -#include <vector>
> -
> -namespace llvm {
> - class Comdat;
> - class MemoryBuffer;
> - class LLVMContext;
> -
> -//===----------------------------------------------------------------------===//
> -// BitcodeReaderValueList Class
> -//===----------------------------------------------------------------------===//
> -
> -class BitcodeReaderValueList {
> - std::vector<WeakVH> ValuePtrs;
> -
> - /// ResolveConstants - As we resolve forward-referenced constants, we add
> - /// information about them to this vector. This allows us to resolve them in
> - /// bulk instead of resolving each reference at a time. See the code in
> - /// ResolveConstantForwardRefs for more information about this.
> - ///
> - /// The key of this vector is the placeholder constant, the value is the slot
> - /// number that holds the resolved value.
> - typedef std::vector<std::pair<Constant*, unsigned> > ResolveConstantsTy;
> - ResolveConstantsTy ResolveConstants;
> - LLVMContext &Context;
> -public:
> - BitcodeReaderValueList(LLVMContext &C) : Context(C) {}
> - ~BitcodeReaderValueList() {
> - assert(ResolveConstants.empty() && "Constants not resolved?");
> - }
> -
> - // vector compatibility methods
> - unsigned size() const { return ValuePtrs.size(); }
> - void resize(unsigned N) { ValuePtrs.resize(N); }
> - void push_back(Value *V) {
> - ValuePtrs.push_back(V);
> - }
> -
> - void clear() {
> - assert(ResolveConstants.empty() && "Constants not resolved?");
> - ValuePtrs.clear();
> - }
> -
> - Value *operator[](unsigned i) const {
> - assert(i < ValuePtrs.size());
> - return ValuePtrs[i];
> - }
> -
> - Value *back() const { return ValuePtrs.back(); }
> - void pop_back() { ValuePtrs.pop_back(); }
> - bool empty() const { return ValuePtrs.empty(); }
> - void shrinkTo(unsigned N) {
> - assert(N <= size() && "Invalid shrinkTo request!");
> - ValuePtrs.resize(N);
> - }
> -
> - Constant *getConstantFwdRef(unsigned Idx, Type *Ty);
> - Value *getValueFwdRef(unsigned Idx, Type *Ty);
> -
> - void AssignValue(Value *V, unsigned Idx);
> -
> - /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
> - /// resolves any forward references.
> - void ResolveConstantForwardRefs();
> -};
> -
> -
> -//===----------------------------------------------------------------------===//
> -// BitcodeReaderMDValueList Class
> -//===----------------------------------------------------------------------===//
> -
> -class BitcodeReaderMDValueList {
> - unsigned NumFwdRefs;
> - bool AnyFwdRefs;
> - unsigned MinFwdRef;
> - unsigned MaxFwdRef;
> - std::vector<TrackingMDRef> MDValuePtrs;
> -
> - LLVMContext &Context;
> -public:
> - BitcodeReaderMDValueList(LLVMContext &C)
> - : NumFwdRefs(0), AnyFwdRefs(false), Context(C) {}
> -
> - // vector compatibility methods
> - unsigned size() const { return MDValuePtrs.size(); }
> - void resize(unsigned N) { MDValuePtrs.resize(N); }
> - void push_back(Metadata *MD) { MDValuePtrs.emplace_back(MD); }
> - void clear() { MDValuePtrs.clear(); }
> - Metadata *back() const { return MDValuePtrs.back(); }
> - void pop_back() { MDValuePtrs.pop_back(); }
> - bool empty() const { return MDValuePtrs.empty(); }
> -
> - Metadata *operator[](unsigned i) const {
> - assert(i < MDValuePtrs.size());
> - return MDValuePtrs[i];
> - }
> -
> - void shrinkTo(unsigned N) {
> - assert(N <= size() && "Invalid shrinkTo request!");
> - MDValuePtrs.resize(N);
> - }
> -
> - Metadata *getValueFwdRef(unsigned Idx);
> - void AssignValue(Metadata *MD, unsigned Idx);
> - void tryToResolveCycles();
> -};
> -
> -class BitcodeReader : public GVMaterializer {
> - LLVMContext &Context;
> - DiagnosticHandlerFunction DiagnosticHandler;
> - Module *TheModule;
> - std::unique_ptr<MemoryBuffer> Buffer;
> - std::unique_ptr<BitstreamReader> StreamFile;
> - BitstreamCursor Stream;
> - DataStreamer *LazyStreamer;
> - uint64_t NextUnreadBit;
> - bool SeenValueSymbolTable;
> -
> - std::vector<Type*> TypeList;
> - BitcodeReaderValueList ValueList;
> - BitcodeReaderMDValueList MDValueList;
> - std::vector<Comdat *> ComdatList;
> - SmallVector<Instruction *, 64> InstructionList;
> -
> - std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInits;
> - std::vector<std::pair<GlobalAlias*, unsigned> > AliasInits;
> - std::vector<std::pair<Function*, unsigned> > FunctionPrefixes;
> - std::vector<std::pair<Function*, unsigned> > FunctionPrologues;
> -
> - SmallVector<Instruction*, 64> InstsWithTBAATag;
> -
> - /// MAttributes - The set of attributes by index. Index zero in the
> - /// file is for null, and is thus not represented here. As such all indices
> - /// are off by one.
> - std::vector<AttributeSet> MAttributes;
> -
> - /// \brief The set of attribute groups.
> - std::map<unsigned, AttributeSet> MAttributeGroups;
> -
> - /// FunctionBBs - While parsing a function body, this is a list of the basic
> - /// blocks for the function.
> - std::vector<BasicBlock*> FunctionBBs;
> -
> - // When reading the module header, this list is populated with functions that
> - // have bodies later in the file.
> - std::vector<Function*> FunctionsWithBodies;
> -
> - // When intrinsic functions are encountered which require upgrading they are
> - // stored here with their replacement function.
> - typedef std::vector<std::pair<Function*, Function*> > UpgradedIntrinsicMap;
> - UpgradedIntrinsicMap UpgradedIntrinsics;
> -
> - // Map the bitcode's custom MDKind ID to the Module's MDKind ID.
> - DenseMap<unsigned, unsigned> MDKindMap;
> -
> - // Several operations happen after the module header has been read, but
> - // before function bodies are processed. This keeps track of whether
> - // we've done this yet.
> - bool SeenFirstFunctionBody;
> -
> - /// DeferredFunctionInfo - When function bodies are initially scanned, this
> - /// map contains info about where to find deferred function body in the
> - /// stream.
> - DenseMap<Function*, uint64_t> DeferredFunctionInfo;
> -
> - /// When Metadata block is initially scanned when parsing the module, we may
> - /// choose to defer parsing of the metadata. This vector contains info about
> - /// which Metadata blocks are deferred.
> - std::vector<uint64_t> DeferredMetadataInfo;
> -
> - /// These are basic blocks forward-referenced by block addresses. They are
> - /// inserted lazily into functions when they're loaded. The basic block ID is
> - /// its index into the vector.
> - DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs;
> - std::deque<Function *> BasicBlockFwdRefQueue;
> -
> - /// UseRelativeIDs - Indicates that we are using a new encoding for
> - /// instruction operands where most operands in the current
> - /// FUNCTION_BLOCK are encoded relative to the instruction number,
> - /// for a more compact encoding. Some instruction operands are not
> - /// relative to the instruction ID: basic block numbers, and types.
> - /// Once the old style function blocks have been phased out, we would
> - /// not need this flag.
> - bool UseRelativeIDs;
> -
> - /// True if all functions will be materialized, negating the need to process
> - /// (e.g.) blockaddress forward references.
> - bool WillMaterializeAllForwardRefs;
> -
> - /// Functions that have block addresses taken. This is usually empty.
> - SmallPtrSet<const Function *, 4> BlockAddressesTaken;
> -
> - /// True if any Metadata block has been materialized.
> - bool IsMetadataMaterialized;
> -
> -public:
> - std::error_code Error(BitcodeError E, const Twine &Message);
> - std::error_code Error(BitcodeError E);
> - std::error_code Error(const Twine &Message);
> -
> - explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C,
> - DiagnosticHandlerFunction DiagnosticHandler);
> - explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C,
> - DiagnosticHandlerFunction DiagnosticHandler);
> - ~BitcodeReader() { FreeState(); }
> -
> - std::error_code materializeForwardReferencedFunctions();
> -
> - void FreeState();
> -
> - void releaseBuffer();
> -
> - bool isDematerializable(const GlobalValue *GV) const override;
> - std::error_code materialize(GlobalValue *GV) override;
> - std::error_code MaterializeModule(Module *M) override;
> - std::vector<StructType *> getIdentifiedStructTypes() const override;
> - void Dematerialize(GlobalValue *GV) override;
> -
> - /// @brief Main interface to parsing a bitcode buffer.
> - /// @returns true if an error occurred.
> - std::error_code ParseBitcodeInto(Module *M,
> - bool ShouldLazyLoadMetadata = false);
> -
> - /// @brief Cheap mechanism to just extract module triple
> - /// @returns true if an error occurred.
> - ErrorOr<std::string> parseTriple();
> -
> - static uint64_t decodeSignRotatedValue(uint64_t V);
> -
> - /// Materialize any deferred Metadata block.
> - std::error_code materializeMetadata() override;
> -
> -private:
> - std::vector<StructType *> IdentifiedStructTypes;
> - StructType *createIdentifiedStructType(LLVMContext &Context, StringRef Name);
> - StructType *createIdentifiedStructType(LLVMContext &Context);
> -
> - Type *getTypeByID(unsigned ID);
> - Value *getFnValueByID(unsigned ID, Type *Ty) {
> - if (Ty && Ty->isMetadataTy())
> - return MetadataAsValue::get(Ty->getContext(), getFnMetadataByID(ID));
> - return ValueList.getValueFwdRef(ID, Ty);
> - }
> - Metadata *getFnMetadataByID(unsigned ID) {
> - return MDValueList.getValueFwdRef(ID);
> - }
> - BasicBlock *getBasicBlock(unsigned ID) const {
> - if (ID >= FunctionBBs.size()) return nullptr; // Invalid ID
> - return FunctionBBs[ID];
> - }
> - AttributeSet getAttributes(unsigned i) const {
> - if (i-1 < MAttributes.size())
> - return MAttributes[i-1];
> - return AttributeSet();
> - }
> -
> - /// getValueTypePair - Read a value/type pair out of the specified record from
> - /// slot 'Slot'. Increment Slot past the number of slots used in the record.
> - /// Return true on failure.
> - bool getValueTypePair(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
> - unsigned InstNum, Value *&ResVal) {
> - if (Slot == Record.size()) return true;
> - unsigned ValNo = (unsigned)Record[Slot++];
> - // Adjust the ValNo, if it was encoded relative to the InstNum.
> - if (UseRelativeIDs)
> - ValNo = InstNum - ValNo;
> - if (ValNo < InstNum) {
> - // If this is not a forward reference, just return the value we already
> - // have.
> - ResVal = getFnValueByID(ValNo, nullptr);
> - return ResVal == nullptr;
> - } else if (Slot == Record.size()) {
> - return true;
> - }
> -
> - unsigned TypeNo = (unsigned)Record[Slot++];
> - ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
> - return ResVal == nullptr;
> - }
> -
> - /// popValue - Read a value out of the specified record from slot 'Slot'.
> - /// Increment Slot past the number of slots used by the value in the record.
> - /// Return true if there is an error.
> - bool popValue(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
> - unsigned InstNum, Type *Ty, Value *&ResVal) {
> - if (getValue(Record, Slot, InstNum, Ty, ResVal))
> - return true;
> - // All values currently take a single record slot.
> - ++Slot;
> - return false;
> - }
> -
> - /// getValue -- Like popValue, but does not increment the Slot number.
> - bool getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
> - unsigned InstNum, Type *Ty, Value *&ResVal) {
> - ResVal = getValue(Record, Slot, InstNum, Ty);
> - return ResVal == nullptr;
> - }
> -
> - /// getValue -- Version of getValue that returns ResVal directly,
> - /// or 0 if there is an error.
> - Value *getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
> - unsigned InstNum, Type *Ty) {
> - if (Slot == Record.size()) return nullptr;
> - unsigned ValNo = (unsigned)Record[Slot];
> - // Adjust the ValNo, if it was encoded relative to the InstNum.
> - if (UseRelativeIDs)
> - ValNo = InstNum - ValNo;
> - return getFnValueByID(ValNo, Ty);
> - }
> -
> - /// getValueSigned -- Like getValue, but decodes signed VBRs.
> - Value *getValueSigned(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
> - unsigned InstNum, Type *Ty) {
> - if (Slot == Record.size()) return nullptr;
> - unsigned ValNo = (unsigned)decodeSignRotatedValue(Record[Slot]);
> - // Adjust the ValNo, if it was encoded relative to the InstNum.
> - if (UseRelativeIDs)
> - ValNo = InstNum - ValNo;
> - return getFnValueByID(ValNo, Ty);
> - }
> -
> - /// Converts alignment exponent (i.e. power of two (or zero)) to the
> - /// corresponding alignment to use. If alignment is too large, returns
> - /// a corresponding error code.
> - std::error_code parseAlignmentValue(uint64_t Exponent, unsigned &Alignment);
> - std::error_code ParseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
> - std::error_code ParseModule(bool Resume, bool ShouldLazyLoadMetadata = false);
> - std::error_code ParseAttributeBlock();
> - std::error_code ParseAttributeGroupBlock();
> - std::error_code ParseTypeTable();
> - std::error_code ParseTypeTableBody();
> -
> - std::error_code ParseValueSymbolTable();
> - std::error_code ParseConstants();
> - std::error_code RememberAndSkipFunctionBody();
> - /// Save the positions of the Metadata blocks and skip parsing the blocks.
> - std::error_code rememberAndSkipMetadata();
> - std::error_code ParseFunctionBody(Function *F);
> - std::error_code GlobalCleanup();
> - std::error_code ResolveGlobalAndAliasInits();
> - std::error_code ParseMetadata();
> - std::error_code ParseMetadataAttachment();
> - ErrorOr<std::string> parseModuleTriple();
> - std::error_code ParseUseLists();
> - std::error_code InitStream();
> - std::error_code InitStreamFromBuffer();
> - std::error_code InitLazyStream();
> - std::error_code FindFunctionInStream(
> - Function *F,
> - DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
> -};
> -
> -} // End llvm namespace
> -
> -#endif
>
>
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