#ifndef BITCODE_READER_H
#define BITCODE_READER_H
#include "llvm/GVMaterializer.h"
#include "llvm/Attributes.h"
#include "llvm/Type.h"
#include "llvm/OperandTraits.h"
#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/Bitcode/LLVMBitCodes.h"
#include "llvm/Support/ValueHandle.h"
#include "llvm/ADT/DenseMap.h"
#include <vector>
namespace llvm {
class MemoryBuffer;
class LLVMContext;
class BitcodeReaderValueList {
std::vector<WeakVH> ValuePtrs;
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?");
}
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);
void ResolveConstantForwardRefs();
};
class BitcodeReaderMDValueList {
std::vector<WeakVH> MDValuePtrs;
LLVMContext &Context;
public:
BitcodeReaderMDValueList(LLVMContext& C) : Context(C) {}
unsigned size() const { return MDValuePtrs.size(); }
void resize(unsigned N) { MDValuePtrs.resize(N); }
void push_back(Value *V) { MDValuePtrs.push_back(V); }
void clear() { MDValuePtrs.clear(); }
Value *back() const { return MDValuePtrs.back(); }
void pop_back() { MDValuePtrs.pop_back(); }
bool empty() const { return MDValuePtrs.empty(); }
Value *operator[](unsigned i) const {
assert(i < MDValuePtrs.size());
return MDValuePtrs[i];
}
void shrinkTo(unsigned N) {
assert(N <= size() && "Invalid shrinkTo request!");
MDValuePtrs.resize(N);
}
Value *getValueFwdRef(unsigned Idx);
void AssignValue(Value *V, unsigned Idx);
};
class BitcodeReader : public GVMaterializer {
LLVMContext &Context;
Module *TheModule;
MemoryBuffer *Buffer;
bool BufferOwned;
OwningPtr<BitstreamReader> StreamFile;
BitstreamCursor Stream;
DataStreamer *LazyStreamer;
uint64_t NextUnreadBit;
bool SeenValueSymbolTable;
const char *ErrorString;
std::vector<Type*> TypeList;
BitcodeReaderValueList ValueList;
BitcodeReaderMDValueList MDValueList;
SmallVector<Instruction *, 64> InstructionList;
SmallVector<SmallVector<uint64_t, 64>, 64> UseListRecords;
std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInits;
std::vector<std::pair<GlobalAlias*, unsigned> > AliasInits;
std::vector<AttrListPtr> MAttributes;
std::vector<BasicBlock*> FunctionBBs;
std::vector<Function*> FunctionsWithBodies;
typedef std::vector<std::pair<Function*, Function*> > UpgradedIntrinsicMap;
UpgradedIntrinsicMap UpgradedIntrinsics;
DenseMap<unsigned, unsigned> MDKindMap;
bool SeenFirstFunctionBody;
DenseMap<Function*, uint64_t> DeferredFunctionInfo;
typedef std::pair<unsigned, GlobalVariable*> BlockAddrRefTy;
DenseMap<Function*, std::vector<BlockAddrRefTy> > BlockAddrFwdRefs;
public:
explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C)
: Context(C), TheModule(0), Buffer(buffer), BufferOwned(false),
LazyStreamer(0), NextUnreadBit(0), SeenValueSymbolTable(false),
ErrorString(0), ValueList(C), MDValueList(C),
SeenFirstFunctionBody(false) {
}
explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C)
: Context(C), TheModule(0), Buffer(0), BufferOwned(false),
LazyStreamer(streamer), NextUnreadBit(0), SeenValueSymbolTable(false),
ErrorString(0), ValueList(C), MDValueList(C),
SeenFirstFunctionBody(false) {
}
~BitcodeReader() {
FreeState();
}
void materializeForwardReferencedFunctions();
void FreeState();
void setBufferOwned(bool Owned) { BufferOwned = Owned; }
virtual bool isMaterializable(const GlobalValue *GV) const;
virtual bool isDematerializable(const GlobalValue *GV) const;
virtual bool Materialize(GlobalValue *GV, std::string *ErrInfo = 0);
virtual bool MaterializeModule(Module *M, std::string *ErrInfo = 0);
virtual void Dematerialize(GlobalValue *GV);
bool Error(const char *Str) {
ErrorString = Str;
return true;
}
const char *getErrorString() const { return ErrorString; }
bool ParseBitcodeInto(Module *M);
bool ParseTriple(std::string &Triple);
private:
Type *getTypeByID(unsigned ID);
Value *getFnValueByID(unsigned ID, Type *Ty) {
if (Ty && Ty->isMetadataTy())
return MDValueList.getValueFwdRef(ID);
return ValueList.getValueFwdRef(ID, Ty);
}
BasicBlock *getBasicBlock(unsigned ID) const {
if (ID >= FunctionBBs.size()) return 0; return FunctionBBs[ID];
}
AttrListPtr getAttributes(unsigned i) const {
if (i-1 < MAttributes.size())
return MAttributes[i-1];
return AttrListPtr();
}
bool getValueTypePair(SmallVector<uint64_t, 64> &Record, unsigned &Slot,
unsigned InstNum, Value *&ResVal) {
if (Slot == Record.size()) return true;
unsigned ValNo = (unsigned)Record[Slot++];
if (ValNo < InstNum) {
ResVal = getFnValueByID(ValNo, 0);
return ResVal == 0;
} else if (Slot == Record.size()) {
return true;
}
unsigned TypeNo = (unsigned)Record[Slot++];
ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
return ResVal == 0;
}
bool getValue(SmallVector<uint64_t, 64> &Record, unsigned &Slot,
Type *Ty, Value *&ResVal) {
if (Slot == Record.size()) return true;
unsigned ValNo = (unsigned)Record[Slot++];
ResVal = getFnValueByID(ValNo, Ty);
return ResVal == 0;
}
bool ParseModule(bool Resume);
bool ParseAttributeBlock();
bool ParseTypeTable();
bool ParseTypeTableBody();
bool ParseValueSymbolTable();
bool ParseConstants();
bool RememberAndSkipFunctionBody();
bool ParseFunctionBody(Function *F);
bool GlobalCleanup();
bool ResolveGlobalAndAliasInits();
bool ParseMetadata();
bool ParseMetadataAttachment();
bool ParseModuleTriple(std::string &Triple);
bool ParseUseLists();
bool InitStream();
bool InitStreamFromBuffer();
bool InitLazyStream();
bool FindFunctionInStream(Function *F,
DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator);
};
}
#endif