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- //===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
- //
- // 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.
- //
- //===----------------------------------------------------------------------===//
- #include "llvm/Bitcode/ReaderWriter.h"
- #include "BitcodeReader.h"
- #include "llvm/Constants.h"
- #include "llvm/DerivedTypes.h"
- #include "llvm/InlineAsm.h"
- #include "llvm/IntrinsicInst.h"
- #include "llvm/Module.h"
- #include "llvm/Operator.h"
- #include "llvm/AutoUpgrade.h"
- #include "llvm/ADT/SmallString.h"
- #include "llvm/ADT/SmallVector.h"
- #include "llvm/Support/MathExtras.h"
- #include "llvm/Support/MemoryBuffer.h"
- #include "llvm/OperandTraits.h"
- using namespace llvm;
- void BitcodeReader::FreeState() {
- if (BufferOwned)
- delete Buffer;
- Buffer = 0;
- std::vector<PATypeHolder>().swap(TypeList);
- ValueList.clear();
- MDValueList.clear();
- std::vector<AttrListPtr>().swap(MAttributes);
- std::vector<BasicBlock*>().swap(FunctionBBs);
- std::vector<Function*>().swap(FunctionsWithBodies);
- DeferredFunctionInfo.clear();
- MDKindMap.clear();
- }
- //===----------------------------------------------------------------------===//
- // Helper functions to implement forward reference resolution, etc.
- //===----------------------------------------------------------------------===//
- /// ConvertToString - Convert a string from a record into an std::string, return
- /// true on failure.
- template<typename StrTy>
- static bool ConvertToString(SmallVector<uint64_t, 64> &Record, unsigned Idx,
- StrTy &Result) {
- if (Idx > Record.size())
- return true;
- for (unsigned i = Idx, e = Record.size(); i != e; ++i)
- Result += (char)Record[i];
- return false;
- }
- static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
- switch (Val) {
- default: // Map unknown/new linkages to external
- case 0: return GlobalValue::ExternalLinkage;
- case 1: return GlobalValue::WeakAnyLinkage;
- case 2: return GlobalValue::AppendingLinkage;
- case 3: return GlobalValue::InternalLinkage;
- case 4: return GlobalValue::LinkOnceAnyLinkage;
- case 5: return GlobalValue::DLLImportLinkage;
- case 6: return GlobalValue::DLLExportLinkage;
- case 7: return GlobalValue::ExternalWeakLinkage;
- case 8: return GlobalValue::CommonLinkage;
- case 9: return GlobalValue::PrivateLinkage;
- case 10: return GlobalValue::WeakODRLinkage;
- case 11: return GlobalValue::LinkOnceODRLinkage;
- case 12: return GlobalValue::AvailableExternallyLinkage;
- case 13: return GlobalValue::LinkerPrivateLinkage;
- case 14: return GlobalValue::LinkerPrivateWeakLinkage;
- case 15: return GlobalValue::LinkerPrivateWeakDefAutoLinkage;
- }
- }
- static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
- switch (Val) {
- default: // Map unknown visibilities to default.
- case 0: return GlobalValue::DefaultVisibility;
- case 1: return GlobalValue::HiddenVisibility;
- case 2: return GlobalValue::ProtectedVisibility;
- }
- }
- static int GetDecodedCastOpcode(unsigned Val) {
- switch (Val) {
- default: return -1;
- case bitc::CAST_TRUNC : return Instruction::Trunc;
- case bitc::CAST_ZEXT : return Instruction::ZExt;
- case bitc::CAST_SEXT : return Instruction::SExt;
- case bitc::CAST_FPTOUI : return Instruction::FPToUI;
- case bitc::CAST_FPTOSI : return Instruction::FPToSI;
- case bitc::CAST_UITOFP : return Instruction::UIToFP;
- case bitc::CAST_SITOFP : return Instruction::SIToFP;
- case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
- case bitc::CAST_FPEXT : return Instruction::FPExt;
- case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
- case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
- case bitc::CAST_BITCAST : return Instruction::BitCast;
- }
- }
- static int GetDecodedBinaryOpcode(unsigned Val, const Type *Ty) {
- switch (Val) {
- default: return -1;
- case bitc::BINOP_ADD:
- return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
- case bitc::BINOP_SUB:
- return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
- case bitc::BINOP_MUL:
- return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
- case bitc::BINOP_UDIV: return Instruction::UDiv;
- case bitc::BINOP_SDIV:
- return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
- case bitc::BINOP_UREM: return Instruction::URem;
- case bitc::BINOP_SREM:
- return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
- case bitc::BINOP_SHL: return Instruction::Shl;
- case bitc::BINOP_LSHR: return Instruction::LShr;
- case bitc::BINOP_ASHR: return Instruction::AShr;
- case bitc::BINOP_AND: return Instruction::And;
- case bitc::BINOP_OR: return Instruction::Or;
- case bitc::BINOP_XOR: return Instruction::Xor;
- }
- }
- namespace llvm {
- namespace {
- /// @brief A class for maintaining the slot number definition
- /// as a placeholder for the actual definition for forward constants defs.
- class ConstantPlaceHolder : public ConstantExpr {
- void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
- public:
- // allocate space for exactly one operand
- void *operator new(size_t s) {
- return User::operator new(s, 1);
- }
- explicit ConstantPlaceHolder(const Type *Ty, LLVMContext& Context)
- : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
- Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
- }
- /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
- //static inline bool classof(const ConstantPlaceHolder *) { return true; }
- static bool classof(const Value *V) {
- return isa<ConstantExpr>(V) &&
- cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
- }
- /// Provide fast operand accessors
- //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
- };
- }
- // FIXME: can we inherit this from ConstantExpr?
- template <>
- struct OperandTraits<ConstantPlaceHolder> : public FixedNumOperandTraits<1> {
- };
- }
- void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
- if (Idx == size()) {
- push_back(V);
- return;
- }
- if (Idx >= size())
- resize(Idx+1);
- WeakVH &OldV = ValuePtrs[Idx];
- if (OldV == 0) {
- OldV = V;
- return;
- }
- // Handle constants and non-constants (e.g. instrs) differently for
- // efficiency.
- if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
- ResolveConstants.push_back(std::make_pair(PHC, Idx));
- OldV = V;
- } else {
- // If there was a forward reference to this value, replace it.
- Value *PrevVal = OldV;
- OldV->replaceAllUsesWith(V);
- delete PrevVal;
- }
- }
- Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
- const Type *Ty) {
- if (Idx >= size())
- resize(Idx + 1);
- if (Value *V = ValuePtrs[Idx]) {
- assert(Ty == V->getType() && "Type mismatch in constant table!");
- return cast<Constant>(V);
- }
- // Create and return a placeholder, which will later be RAUW'd.
- Constant *C = new ConstantPlaceHolder(Ty, Context);
- ValuePtrs[Idx] = C;
- return C;
- }
- Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, const Type *Ty) {
- if (Idx >= size())
- resize(Idx + 1);
- if (Value *V = ValuePtrs[Idx]) {
- assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
- return V;
- }
- // No type specified, must be invalid reference.
- if (Ty == 0) return 0;
- // Create and return a placeholder, which will later be RAUW'd.
- Value *V = new Argument(Ty);
- ValuePtrs[Idx] = V;
- return V;
- }
- /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
- /// resolves any forward references. The idea behind this is that we sometimes
- /// get constants (such as large arrays) which reference *many* forward ref
- /// constants. Replacing each of these causes a lot of thrashing when
- /// building/reuniquing the constant. Instead of doing this, we look at all the
- /// uses and rewrite all the place holders at once for any constant that uses
- /// a placeholder.
- void BitcodeReaderValueList::ResolveConstantForwardRefs() {
- // Sort the values by-pointer so that they are efficient to look up with a
- // binary search.
- std::sort(ResolveConstants.begin(), ResolveConstants.end());
- SmallVector<Constant*, 64> NewOps;
- while (!ResolveConstants.empty()) {
- Value *RealVal = operator[](ResolveConstants.back().second);
- Constant *Placeholder = ResolveConstants.back().first;
- ResolveConstants.pop_back();
- // Loop over all users of the placeholder, updating them to reference the
- // new value. If they reference more than one placeholder, update them all
- // at once.
- while (!Placeholder->use_empty()) {
- Value::use_iterator UI = Placeholder->use_begin();
- User *U = *UI;
- // If the using object isn't uniqued, just update the operands. This
- // handles instructions and initializers for global variables.
- if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
- UI.getUse().set(RealVal);
- continue;
- }
- // Otherwise, we have a constant that uses the placeholder. Replace that
- // constant with a new constant that has *all* placeholder uses updated.
- Constant *UserC = cast<Constant>(U);
- for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
- I != E; ++I) {
- Value *NewOp;
- if (!isa<ConstantPlaceHolder>(*I)) {
- // Not a placeholder reference.
- NewOp = *I;
- } else if (*I == Placeholder) {
- // Common case is that it just references this one placeholder.
- NewOp = RealVal;
- } else {
- // Otherwise, look up the placeholder in ResolveConstants.
- ResolveConstantsTy::iterator It =
- std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
- std::pair<Constant*, unsigned>(cast<Constant>(*I),
- 0));
- assert(It != ResolveConstants.end() && It->first == *I);
- NewOp = operator[](It->second);
- }
- NewOps.push_back(cast<Constant>(NewOp));
- }
- // Make the new constant.
- Constant *NewC;
- if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
- NewC = ConstantArray::get(UserCA->getType(), &NewOps[0],
- NewOps.size());
- } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
- NewC = ConstantStruct::get(Context, &NewOps[0], NewOps.size(),
- UserCS->getType()->isPacked());
- } else if (isa<ConstantVector>(UserC)) {
- NewC = ConstantVector::get(&NewOps[0], NewOps.size());
- } else {
- assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
- NewC = cast<ConstantExpr>(UserC)->getWithOperands(&NewOps[0],
- NewOps.size());
- }
- UserC->replaceAllUsesWith(NewC);
- UserC->destroyConstant();
- NewOps.clear();
- }
- // Update all ValueHandles, they should be the only users at this point.
- Placeholder->replaceAllUsesWith(RealVal);
- delete Placeholder;
- }
- }
- void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
- if (Idx == size()) {
- push_back(V);
- return;
- }
- if (Idx >= size())
- resize(Idx+1);
- WeakVH &OldV = MDValuePtrs[Idx];
- if (OldV == 0) {
- OldV = V;
- return;
- }
- // If there was a forward reference to this value, replace it.
- MDNode *PrevVal = cast<MDNode>(OldV);
- OldV->replaceAllUsesWith(V);
- MDNode::deleteTemporary(PrevVal);
- // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
- // value for Idx.
- MDValuePtrs[Idx] = V;
- }
- Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
- if (Idx >= size())
- resize(Idx + 1);
- if (Value *V = MDValuePtrs[Idx]) {
- assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
- return V;
- }
- // Create and return a placeholder, which will later be RAUW'd.
- Value *V = MDNode::getTemporary(Context, 0, 0);
- MDValuePtrs[Idx] = V;
- return V;
- }
- const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
- // If the TypeID is in range, return it.
- if (ID < TypeList.size())
- return TypeList[ID].get();
- if (!isTypeTable) return 0;
- // The type table allows forward references. Push as many Opaque types as
- // needed to get up to ID.
- while (TypeList.size() <= ID)
- TypeList.push_back(OpaqueType::get(Context));
- return TypeList.back().get();
- }
- //===----------------------------------------------------------------------===//
- // Functions for parsing blocks from the bitcode file
- //===----------------------------------------------------------------------===//
- bool BitcodeReader::ParseAttributeBlock() {
- if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
- return Error("Malformed block record");
- if (!MAttributes.empty())
- return Error("Multiple PARAMATTR blocks found!");
- SmallVector<uint64_t, 64> Record;
- SmallVector<AttributeWithIndex, 8> Attrs;
- // Read all the records.
- while (1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (Stream.ReadBlockEnd())
- return Error("Error at end of PARAMATTR block");
- return false;
- }
- if (Code == bitc::ENTER_SUBBLOCK) {
- // No known subblocks, always skip them.
- Stream.ReadSubBlockID();
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a record.
- Record.clear();
- switch (Stream.ReadRecord(Code, Record)) {
- default: // Default behavior: ignore.
- break;
- case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
- if (Record.size() & 1)
- return Error("Invalid ENTRY record");
- // FIXME : Remove this autoupgrade code in LLVM 3.0.
- // If Function attributes are using index 0 then transfer them
- // to index ~0. Index 0 is used for return value attributes but used to be
- // used for function attributes.
- Attributes RetAttribute = Attribute::None;
- Attributes FnAttribute = Attribute::None;
- for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
- // FIXME: remove in LLVM 3.0
- // The alignment is stored as a 16-bit raw value from bits 31--16.
- // We shift the bits above 31 down by 11 bits.
- unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
- if (Alignment && !isPowerOf2_32(Alignment))
- return Error("Alignment is not a power of two.");
- Attributes ReconstitutedAttr = Record[i+1] & 0xffff;
- if (Alignment)
- ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
- ReconstitutedAttr |= (Record[i+1] & (0xffffull << 32)) >> 11;
- Record[i+1] = ReconstitutedAttr;
- if (Record[i] == 0)
- RetAttribute = Record[i+1];
- else if (Record[i] == ~0U)
- FnAttribute = Record[i+1];
- }
- unsigned OldRetAttrs = (Attribute::NoUnwind|Attribute::NoReturn|
- Attribute::ReadOnly|Attribute::ReadNone);
- if (FnAttribute == Attribute::None && RetAttribute != Attribute::None &&
- (RetAttribute & OldRetAttrs) != 0) {
- if (FnAttribute == Attribute::None) { // add a slot so they get added.
- Record.push_back(~0U);
- Record.push_back(0);
- }
- FnAttribute |= RetAttribute & OldRetAttrs;
- RetAttribute &= ~OldRetAttrs;
- }
- for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
- if (Record[i] == 0) {
- if (RetAttribute != Attribute::None)
- Attrs.push_back(AttributeWithIndex::get(0, RetAttribute));
- } else if (Record[i] == ~0U) {
- if (FnAttribute != Attribute::None)
- Attrs.push_back(AttributeWithIndex::get(~0U, FnAttribute));
- } else if (Record[i+1] != Attribute::None)
- Attrs.push_back(AttributeWithIndex::get(Record[i], Record[i+1]));
- }
- MAttributes.push_back(AttrListPtr::get(Attrs.begin(), Attrs.end()));
- Attrs.clear();
- break;
- }
- }
- }
- }
- bool BitcodeReader::ParseTypeTable() {
- if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID))
- return Error("Malformed block record");
- if (!TypeList.empty())
- return Error("Multiple TYPE_BLOCKs found!");
- SmallVector<uint64_t, 64> Record;
- unsigned NumRecords = 0;
- // Read all the records for this type table.
- while (1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (NumRecords != TypeList.size())
- return Error("Invalid type forward reference in TYPE_BLOCK");
- if (Stream.ReadBlockEnd())
- return Error("Error at end of type table block");
- return false;
- }
- if (Code == bitc::ENTER_SUBBLOCK) {
- // No known subblocks, always skip them.
- Stream.ReadSubBlockID();
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a record.
- Record.clear();
- const Type *ResultTy = 0;
- switch (Stream.ReadRecord(Code, Record)) {
- default: // Default behavior: unknown type.
- ResultTy = 0;
- break;
- case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
- // TYPE_CODE_NUMENTRY contains a count of the number of types in the
- // type list. This allows us to reserve space.
- if (Record.size() < 1)
- return Error("Invalid TYPE_CODE_NUMENTRY record");
- TypeList.reserve(Record[0]);
- continue;
- case bitc::TYPE_CODE_VOID: // VOID
- ResultTy = Type::getVoidTy(Context);
- break;
- case bitc::TYPE_CODE_FLOAT: // FLOAT
- ResultTy = Type::getFloatTy(Context);
- break;
- case bitc::TYPE_CODE_DOUBLE: // DOUBLE
- ResultTy = Type::getDoubleTy(Context);
- break;
- case bitc::TYPE_CODE_X86_FP80: // X86_FP80
- ResultTy = Type::getX86_FP80Ty(Context);
- break;
- case bitc::TYPE_CODE_FP128: // FP128
- ResultTy = Type::getFP128Ty(Context);
- break;
- case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
- ResultTy = Type::getPPC_FP128Ty(Context);
- break;
- case bitc::TYPE_CODE_LABEL: // LABEL
- ResultTy = Type::getLabelTy(Context);
- break;
- case bitc::TYPE_CODE_OPAQUE: // OPAQUE
- ResultTy = 0;
- break;
- case bitc::TYPE_CODE_METADATA: // METADATA
- ResultTy = Type::getMetadataTy(Context);
- break;
- case bitc::TYPE_CODE_X86_MMX: // X86_MMX
- ResultTy = Type::getX86_MMXTy(Context);
- break;
- case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
- if (Record.size() < 1)
- return Error("Invalid Integer type record");
- ResultTy = IntegerType::get(Context, Record[0]);
- break;
- case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
- // [pointee type, address space]
- if (Record.size() < 1)
- return Error("Invalid POINTER type record");
- unsigned AddressSpace = 0;
- if (Record.size() == 2)
- AddressSpace = Record[1];
- ResultTy = PointerType::get(getTypeByID(Record[0], true),
- AddressSpace);
- break;
- }
- case bitc::TYPE_CODE_FUNCTION: {
- // FIXME: attrid is dead, remove it in LLVM 3.0
- // FUNCTION: [vararg, attrid, retty, paramty x N]
- if (Record.size() < 3)
- return Error("Invalid FUNCTION type record");
- std::vector<const Type*> ArgTys;
- for (unsigned i = 3, e = Record.size(); i != e; ++i)
- ArgTys.push_back(getTypeByID(Record[i], true));
- ResultTy = FunctionType::get(getTypeByID(Record[2], true), ArgTys,
- Record[0]);
- break;
- }
- case bitc::TYPE_CODE_STRUCT: { // STRUCT: [ispacked, eltty x N]
- if (Record.size() < 1)
- return Error("Invalid STRUCT type record");
- std::vector<const Type*> EltTys;
- for (unsigned i = 1, e = Record.size(); i != e; ++i)
- EltTys.push_back(getTypeByID(Record[i], true));
- ResultTy = StructType::get(Context, EltTys, Record[0]);
- break;
- }
- case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
- if (Record.size() < 2)
- return Error("Invalid ARRAY type record");
- ResultTy = ArrayType::get(getTypeByID(Record[1], true), Record[0]);
- break;
- case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
- if (Record.size() < 2)
- return Error("Invalid VECTOR type record");
- ResultTy = VectorType::get(getTypeByID(Record[1], true), Record[0]);
- break;
- }
- if (NumRecords == TypeList.size()) {
- // If this is a new type slot, just append it.
- TypeList.push_back(ResultTy ? ResultTy : OpaqueType::get(Context));
- ++NumRecords;
- } else if (ResultTy == 0) {
- // Otherwise, this was forward referenced, so an opaque type was created,
- // but the result type is actually just an opaque. Leave the one we
- // created previously.
- ++NumRecords;
- } else {
- // Otherwise, this was forward referenced, so an opaque type was created.
- // Resolve the opaque type to the real type now.
- assert(NumRecords < TypeList.size() && "Typelist imbalance");
- const OpaqueType *OldTy = cast<OpaqueType>(TypeList[NumRecords++].get());
- // Don't directly push the new type on the Tab. Instead we want to replace
- // the opaque type we previously inserted with the new concrete value. The
- // refinement from the abstract (opaque) type to the new type causes all
- // uses of the abstract type to use the concrete type (NewTy). This will
- // also cause the opaque type to be deleted.
- const_cast<OpaqueType*>(OldTy)->refineAbstractTypeTo(ResultTy);
- // This should have replaced the old opaque type with the new type in the
- // value table... or with a preexisting type that was already in the
- // system. Let's just make sure it did.
- assert(TypeList[NumRecords-1].get() != OldTy &&
- "refineAbstractType didn't work!");
- }
- }
- }
- bool BitcodeReader::ParseTypeSymbolTable() {
- if (Stream.EnterSubBlock(bitc::TYPE_SYMTAB_BLOCK_ID))
- return Error("Malformed block record");
- SmallVector<uint64_t, 64> Record;
- // Read all the records for this type table.
- std::string TypeName;
- while (1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (Stream.ReadBlockEnd())
- return Error("Error at end of type symbol table block");
- return false;
- }
- if (Code == bitc::ENTER_SUBBLOCK) {
- // No known subblocks, always skip them.
- Stream.ReadSubBlockID();
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a record.
- Record.clear();
- switch (Stream.ReadRecord(Code, Record)) {
- default: // Default behavior: unknown type.
- break;
- case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namechar x N]
- if (ConvertToString(Record, 1, TypeName))
- return Error("Invalid TST_ENTRY record");
- unsigned TypeID = Record[0];
- if (TypeID >= TypeList.size())
- return Error("Invalid Type ID in TST_ENTRY record");
- TheModule->addTypeName(TypeName, TypeList[TypeID].get());
- TypeName.clear();
- break;
- }
- }
- }
- bool BitcodeReader::ParseValueSymbolTable() {
- if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
- return Error("Malformed block record");
- SmallVector<uint64_t, 64> Record;
- // Read all the records for this value table.
- SmallString<128> ValueName;
- while (1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (Stream.ReadBlockEnd())
- return Error("Error at end of value symbol table block");
- return false;
- }
- if (Code == bitc::ENTER_SUBBLOCK) {
- // No known subblocks, always skip them.
- Stream.ReadSubBlockID();
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a record.
- Record.clear();
- switch (Stream.ReadRecord(Code, Record)) {
- default: // Default behavior: unknown type.
- break;
- case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
- if (ConvertToString(Record, 1, ValueName))
- return Error("Invalid VST_ENTRY record");
- unsigned ValueID = Record[0];
- if (ValueID >= ValueList.size())
- return Error("Invalid Value ID in VST_ENTRY record");
- Value *V = ValueList[ValueID];
- V->setName(StringRef(ValueName.data(), ValueName.size()));
- ValueName.clear();
- break;
- }
- case bitc::VST_CODE_BBENTRY: {
- if (ConvertToString(Record, 1, ValueName))
- return Error("Invalid VST_BBENTRY record");
- BasicBlock *BB = getBasicBlock(Record[0]);
- if (BB == 0)
- return Error("Invalid BB ID in VST_BBENTRY record");
- BB->setName(StringRef(ValueName.data(), ValueName.size()));
- ValueName.clear();
- break;
- }
- }
- }
- }
- bool BitcodeReader::ParseMetadata() {
- unsigned NextMDValueNo = MDValueList.size();
- if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
- return Error("Malformed block record");
- SmallVector<uint64_t, 64> Record;
- // Read all the records.
- while (1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (Stream.ReadBlockEnd())
- return Error("Error at end of PARAMATTR block");
- return false;
- }
- if (Code == bitc::ENTER_SUBBLOCK) {
- // No known subblocks, always skip them.
- Stream.ReadSubBlockID();
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- bool IsFunctionLocal = false;
- // Read a record.
- Record.clear();
- switch (Stream.ReadRecord(Code, Record)) {
- default: // Default behavior: ignore.
- break;
- case bitc::METADATA_NAME: {
- // Read named of the named metadata.
- unsigned NameLength = Record.size();
- SmallString<8> Name;
- Name.resize(NameLength);
- for (unsigned i = 0; i != NameLength; ++i)
- Name[i] = Record[i];
- Record.clear();
- Code = Stream.ReadCode();
- // METADATA_NAME is always followed by METADATA_NAMED_NODE2.
- unsigned NextBitCode = Stream.ReadRecord(Code, Record);
- // FIXME: LLVM 3.0: Remove this.
- if (NextBitCode == bitc::METADATA_NAMED_NODE)
- break;
- if (NextBitCode != bitc::METADATA_NAMED_NODE2)
- assert ( 0 && "Inavlid Named Metadata record");
- // Read named metadata elements.
- unsigned Size = Record.size();
- NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
- for (unsigned i = 0; i != Size; ++i) {
- MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
- if (MD == 0)
- return Error("Malformed metadata record");
- NMD->addOperand(MD);
- }
- break;
- }
- case bitc::METADATA_FN_NODE:
- // FIXME: Legacy support for the old fn_node, where function-local
- // metadata operands were bogus. Remove in LLVM 3.0.
- break;
- case bitc::METADATA_NODE:
- // FIXME: Legacy support for the old node, where function-local
- // metadata operands were bogus. Remove in LLVM 3.0.
- break;
- case bitc::METADATA_FN_NODE2:
- IsFunctionLocal = true;
- // fall-through
- case bitc::METADATA_NODE2: {
- if (Record.size() % 2 == 1)
- return Error("Invalid METADATA_NODE2 record");
- unsigned Size = Record.size();
- SmallVector<Value*, 8> Elts;
- for (unsigned i = 0; i != Size; i += 2) {
- const Type *Ty = getTypeByID(Record[i], false);
- if (Ty->isMetadataTy())
- Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
- else if (!Ty->isVoidTy())
- Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
- else
- Elts.push_back(NULL);
- }
- Value *V = MDNode::getWhenValsUnresolved(Context,
- Elts.data(), Elts.size(),
- IsFunctionLocal);
- IsFunctionLocal = false;
- MDValueList.AssignValue(V, NextMDValueNo++);
- break;
- }
- case bitc::METADATA_STRING: {
- unsigned MDStringLength = Record.size();
- SmallString<8> String;
- String.resize(MDStringLength);
- for (unsigned i = 0; i != MDStringLength; ++i)
- String[i] = Record[i];
- Value *V = MDString::get(Context,
- StringRef(String.data(), String.size()));
- MDValueList.AssignValue(V, NextMDValueNo++);
- break;
- }
- case bitc::METADATA_KIND: {
- unsigned RecordLength = Record.size();
- if (Record.empty() || RecordLength < 2)
- return Error("Invalid METADATA_KIND record");
- SmallString<8> Name;
- Name.resize(RecordLength-1);
- unsigned Kind = Record[0];
- for (unsigned i = 1; i != RecordLength; ++i)
- Name[i-1] = Record[i];
-
- unsigned NewKind = TheModule->getMDKindID(Name.str());
- if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
- return Error("Conflicting METADATA_KIND records");
- break;
- }
- }
- }
- }
- /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
- /// the LSB for dense VBR encoding.
- static uint64_t DecodeSignRotatedValue(uint64_t V) {
- if ((V & 1) == 0)
- return V >> 1;
- if (V != 1)
- return -(V >> 1);
- // There is no such thing as -0 with integers. "-0" really means MININT.
- return 1ULL << 63;
- }
- /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
- /// values and aliases that we can.
- bool BitcodeReader::ResolveGlobalAndAliasInits() {
- std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
- std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
- GlobalInitWorklist.swap(GlobalInits);
- AliasInitWorklist.swap(AliasInits);
- while (!GlobalInitWorklist.empty()) {
- unsigned ValID = GlobalInitWorklist.back().second;
- if (ValID >= ValueList.size()) {
- // Not ready to resolve this yet, it requires something later in the file.
- GlobalInits.push_back(GlobalInitWorklist.back());
- } else {
- if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
- GlobalInitWorklist.back().first->setInitializer(C);
- else
- return Error("Global variable initializer is not a constant!");
- }
- GlobalInitWorklist.pop_back();
- }
- while (!AliasInitWorklist.empty()) {
- unsigned ValID = AliasInitWorklist.back().second;
- if (ValID >= ValueList.size()) {
- AliasInits.push_back(AliasInitWorklist.back());
- } else {
- if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
- AliasInitWorklist.back().first->setAliasee(C);
- else
- return Error("Alias initializer is not a constant!");
- }
- AliasInitWorklist.pop_back();
- }
- return false;
- }
- bool BitcodeReader::ParseConstants() {
- if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
- return Error("Malformed block record");
- SmallVector<uint64_t, 64> Record;
- // Read all the records for this value table.
- const Type *CurTy = Type::getInt32Ty(Context);
- unsigned NextCstNo = ValueList.size();
- while (1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK)
- break;
- if (Code == bitc::ENTER_SUBBLOCK) {
- // No known subblocks, always skip them.
- Stream.ReadSubBlockID();
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a record.
- Record.clear();
- Value *V = 0;
- unsigned BitCode = Stream.ReadRecord(Code, Record);
- switch (BitCode) {
- default: // Default behavior: unknown constant
- case bitc::CST_CODE_UNDEF: // UNDEF
- V = UndefValue::get(CurTy);
- break;
- case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
- if (Record.empty())
- return Error("Malformed CST_SETTYPE record");
- if (Record[0] >= TypeList.size())
- return Error("Invalid Type ID in CST_SETTYPE record");
- CurTy = TypeList[Record[0]];
- continue; // Skip the ValueList manipulation.
- case bitc::CST_CODE_NULL: // NULL
- V = Constant::getNullValue(CurTy);
- break;
- case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
- if (!CurTy->isIntegerTy() || Record.empty())
- return Error("Invalid CST_INTEGER record");
- V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
- break;
- case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
- if (!CurTy->isIntegerTy() || Record.empty())
- return Error("Invalid WIDE_INTEGER record");
- unsigned NumWords = Record.size();
- SmallVector<uint64_t, 8> Words;
- Words.resize(NumWords);
- for (unsigned i = 0; i != NumWords; ++i)
- Words[i] = DecodeSignRotatedValue(Record[i]);
- V = ConstantInt::get(Context,
- APInt(cast<IntegerType>(CurTy)->getBitWidth(),
- NumWords, &Words[0]));
- break;
- }
- case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
- if (Record.empty())
- return Error("Invalid FLOAT record");
- if (CurTy->isFloatTy())
- V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
- else if (CurTy->isDoubleTy())
- V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
- else if (CurTy->isX86_FP80Ty()) {
- // Bits are not stored the same way as a normal i80 APInt, compensate.
- uint64_t Rearrange[2];
- Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
- Rearrange[1] = Record[0] >> 48;
- V = ConstantFP::get(Context, APFloat(APInt(80, 2, Rearrange)));
- } else if (CurTy->isFP128Ty())
- V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0]), true));
- else if (CurTy->isPPC_FP128Ty())
- V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0])));
- else
- V = UndefValue::get(CurTy);
- break;
- }
- case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
- if (Record.empty())
- return Error("Invalid CST_AGGREGATE record");
- unsigned Size = Record.size();
- std::vector<Constant*> Elts;
- if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
- for (unsigned i = 0; i != Size; ++i)
- Elts.push_back(ValueList.getConstantFwdRef(Record[i],
- STy->getElementType(i)));
- V = ConstantStruct::get(STy, Elts);
- } else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
- const Type *EltTy = ATy->getElementType();
- for (unsigned i = 0; i != Size; ++i)
- Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
- V = ConstantArray::get(ATy, Elts);
- } else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
- const Type *EltTy = VTy->getElementType();
- for (unsigned i = 0; i != Size; ++i)
- Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
- V = ConstantVector::get(Elts);
- } else {
- V = UndefValue::get(CurTy);
- }
- break;
- }
- case bitc::CST_CODE_STRING: { // STRING: [values]
- if (Record.empty())
- return Error("Invalid CST_AGGREGATE record");
- const ArrayType *ATy = cast<ArrayType>(CurTy);
- const Type *EltTy = ATy->getElementType();
- unsigned Size = Record.size();
- std::vector<Constant*> Elts;
- for (unsigned i = 0; i != Size; ++i)
- Elts.push_back(ConstantInt::get(EltTy, Record[i]));
- V = ConstantArray::get(ATy, Elts);
- break;
- }
- case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
- if (Record.empty())
- return Error("Invalid CST_AGGREGATE record");
- const ArrayType *ATy = cast<ArrayType>(CurTy);
- const Type *EltTy = ATy->getElementType();
- unsigned Size = Record.size();
- std::vector<Constant*> Elts;
- for (unsigned i = 0; i != Size; ++i)
- Elts.push_back(ConstantInt::get(EltTy, Record[i]));
- Elts.push_back(Constant::getNullValue(EltTy));
- V = ConstantArray::get(ATy, Elts);
- break;
- }
- case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
- if (Record.size() < 3) return Error("Invalid CE_BINOP record");
- int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
- if (Opc < 0) {
- V = UndefValue::get(CurTy); // Unknown binop.
- } else {
- Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
- Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
- unsigned Flags = 0;
- if (Record.size() >= 4) {
- if (Opc == Instruction::Add ||
- Opc == Instruction::Sub ||
- Opc == Instruction::Mul) {
- if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
- Flags |= OverflowingBinaryOperator::NoSignedWrap;
- if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
- Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
- } else if (Opc == Instruction::SDiv) {
- if (Record[3] & (1 << bitc::SDIV_EXACT))
- Flags |= SDivOperator::IsExact;
- }
- }
- V = ConstantExpr::get(Opc, LHS, RHS, Flags);
- }
- break;
- }
- case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
- if (Record.size() < 3) return Error("Invalid CE_CAST record");
- int Opc = GetDecodedCastOpcode(Record[0]);
- if (Opc < 0) {
- V = UndefValue::get(CurTy); // Unknown cast.
- } else {
- const Type *OpTy = getTypeByID(Record[1]);
- if (!OpTy) return Error("Invalid CE_CAST record");
- Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
- V = ConstantExpr::getCast(Opc, Op, CurTy);
- }
- break;
- }
- case bitc::CST_CODE_CE_INBOUNDS_GEP:
- case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
- if (Record.size() & 1) return Error("Invalid CE_GEP record");
- SmallVector<Constant*, 16> Elts;
- for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
- const Type *ElTy = getTypeByID(Record[i]);
- if (!ElTy) return Error("Invalid CE_GEP record");
- Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
- }
- if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
- V = ConstantExpr::getInBoundsGetElementPtr(Elts[0], &Elts[1],
- Elts.size()-1);
- else
- V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1],
- Elts.size()-1);
- break;
- }
- case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
- if (Record.size() < 3) return Error("Invalid CE_SELECT record");
- V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
- Type::getInt1Ty(Context)),
- ValueList.getConstantFwdRef(Record[1],CurTy),
- ValueList.getConstantFwdRef(Record[2],CurTy));
- break;
- case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
- if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
- const VectorType *OpTy =
- dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
- if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
- Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
- Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
- V = ConstantExpr::getExtractElement(Op0, Op1);
- break;
- }
- case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
- const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
- if (Record.size() < 3 || OpTy == 0)
- return Error("Invalid CE_INSERTELT record");
- Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
- Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
- OpTy->getElementType());
- Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
- V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
- break;
- }
- case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
- const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
- if (Record.size() < 3 || OpTy == 0)
- return Error("Invalid CE_SHUFFLEVEC record");
- Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
- Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
- const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
- OpTy->getNumElements());
- Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
- V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
- break;
- }
- case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
- const VectorType *RTy = dyn_cast<VectorType>(CurTy);
- const VectorType *OpTy = dyn_cast<VectorType>(getTypeByID(Record[0]));
- if (Record.size() < 4 || RTy == 0 || OpTy == 0)
- return Error("Invalid CE_SHUFVEC_EX record");
- Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
- Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
- const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
- RTy->getNumElements());
- Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
- V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
- break;
- }
- case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
- if (Record.size() < 4) return Error("Invalid CE_CMP record");
- const Type *OpTy = getTypeByID(Record[0]);
- if (OpTy == 0) return Error("Invalid CE_CMP record");
- Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
- Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
- if (OpTy->isFPOrFPVectorTy())
- V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
- else
- V = ConstantExpr::getICmp(Record[3], Op0, Op1);
- break;
- }
- case bitc::CST_CODE_INLINEASM: {
- if (Record.size() < 2) return Error("Invalid INLINEASM record");
- std::string AsmStr, ConstrStr;
- bool HasSideEffects = Record[0] & 1;
- bool IsAlignStack = Record[0] >> 1;
- unsigned AsmStrSize = Record[1];
- if (2+AsmStrSize >= Record.size())
- return Error("Invalid INLINEASM record");
- unsigned ConstStrSize = Record[2+AsmStrSize];
- if (3+AsmStrSize+ConstStrSize > Record.size())
- return Error("Invalid INLINEASM record");
- for (unsigned i = 0; i != AsmStrSize; ++i)
- AsmStr += (char)Record[2+i];
- for (unsigned i = 0; i != ConstStrSize; ++i)
- ConstrStr += (char)Record[3+AsmStrSize+i];
- const PointerType *PTy = cast<PointerType>(CurTy);
- V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
- AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
- break;
- }
- case bitc::CST_CODE_BLOCKADDRESS:{
- if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
- const Type *FnTy = getTypeByID(Record[0]);
- if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
- Function *Fn =
- dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
- if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
-
- GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
- Type::getInt8Ty(Context),
- false, GlobalValue::InternalLinkage,
- 0, "");
- BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
- V = FwdRef;
- break;
- }
- }
- ValueList.AssignValue(V, NextCstNo);
- ++NextCstNo;
- }
- if (NextCstNo != ValueList.size())
- return Error("Invalid constant reference!");
- if (Stream.ReadBlockEnd())
- return Error("Error at end of constants block");
- // Once all the constants have been read, go through and resolve forward
- // references.
- ValueList.ResolveConstantForwardRefs();
- return false;
- }
- /// RememberAndSkipFunctionBody - When we see the block for a function body,
- /// remember where it is and then skip it. This lets us lazily deserialize the
- /// functions.
- bool BitcodeReader::RememberAndSkipFunctionBody() {
- // Get the function we are talking about.
- if (FunctionsWithBodies.empty())
- return Error("Insufficient function protos");
- Function *Fn = FunctionsWithBodies.back();
- FunctionsWithBodies.pop_back();
- // Save the current stream state.
- uint64_t CurBit = Stream.GetCurrentBitNo();
- DeferredFunctionInfo[Fn] = CurBit;
- // Skip over the function block for now.
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- return false;
- }
- bool BitcodeReader::ParseModule() {
- if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
- return Error("Malformed block record");
- SmallVector<uint64_t, 64> Record;
- std::vector<std::string> SectionTable;
- std::vector<std::string> GCTable;
- // Read all the records for this module.
- while (!Stream.AtEndOfStream()) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (Stream.ReadBlockEnd())
- return Error("Error at end of module block");
- // Patch the initializers for globals and aliases up.
- ResolveGlobalAndAliasInits();
- if (!GlobalInits.empty() || !AliasInits.empty())
- return Error("Malformed global initializer set");
- if (!FunctionsWithBodies.empty())
- return Error("Too few function bodies found");
- // Look for intrinsic functions which need to be upgraded at some point
- for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
- FI != FE; ++FI) {
- Function* NewFn;
- if (UpgradeIntrinsicFunction(FI, NewFn))
- UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
- }
- // Look for global variables which need to be renamed.
- for (Module::global_iterator
- GI = TheModule->global_begin(), GE = TheModule->global_end();
- GI != GE; ++GI)
- UpgradeGlobalVariable(GI);
- // Force deallocation of memory for these vectors to favor the client that
- // want lazy deserialization.
- std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
- std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
- std::vector<Function*>().swap(FunctionsWithBodies);
- return false;
- }
- if (Code == bitc::ENTER_SUBBLOCK) {
- switch (Stream.ReadSubBlockID()) {
- default: // Skip unknown content.
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- break;
- case bitc::BLOCKINFO_BLOCK_ID:
- if (Stream.ReadBlockInfoBlock())
- return Error("Malformed BlockInfoBlock");
- break;
- case bitc::PARAMATTR_BLOCK_ID:
- if (ParseAttributeBlock())
- return true;
- break;
- case bitc::TYPE_BLOCK_ID:
- if (ParseTypeTable())
- return true;
- break;
- case bitc::TYPE_SYMTAB_BLOCK_ID:
- if (ParseTypeSymbolTable())
- return true;
- break;
- case bitc::VALUE_SYMTAB_BLOCK_ID:
- if (ParseValueSymbolTable())
- return true;
- break;
- case bitc::CONSTANTS_BLOCK_ID:
- if (ParseConstants() || ResolveGlobalAndAliasInits())
- return true;
- break;
- case bitc::METADATA_BLOCK_ID:
- if (ParseMetadata())
- return true;
- break;
- case bitc::FUNCTION_BLOCK_ID:
- // If this is the first function body we've seen, reverse the
- // FunctionsWithBodies list.
- if (!HasReversedFunctionsWithBodies) {
- std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
- HasReversedFunctionsWithBodies = true;
- }
- if (RememberAndSkipFunctionBody())
- return true;
- break;
- }
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a record.
- switch (Stream.ReadRecord(Code, Record)) {
- default: break; // Default behavior, ignore unknown content.
- case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
- if (Record.size() < 1)
- return Error("Malformed MODULE_CODE_VERSION");
- // Only version #0 is supported so far.
- if (Record[0] != 0)
- return Error("Unknown bitstream version!");
- break;
- case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error("Invalid MODULE_CODE_TRIPLE record");
- TheModule->setTargetTriple(S);
- break;
- }
- case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error("Invalid MODULE_CODE_DATALAYOUT record");
- TheModule->setDataLayout(S);
- break;
- }
- case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error("Invalid MODULE_CODE_ASM record");
- TheModule->setModuleInlineAsm(S);
- break;
- }
- case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error("Invalid MODULE_CODE_DEPLIB record");
- TheModule->addLibrary(S);
- break;
- }
- case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error("Invalid MODULE_CODE_SECTIONNAME record");
- SectionTable.push_back(S);
- break;
- }
- case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error("Invalid MODULE_CODE_GCNAME record");
- GCTable.push_back(S);
- break;
- }
- // GLOBALVAR: [pointer type, isconst, initid,
- // linkage, alignment, section, visibility, threadlocal]
- case bitc::MODULE_CODE_GLOBALVAR: {
- if (Record.size() < 6)
- return Error("Invalid MODULE_CODE_GLOBALVAR record");
- const Type *Ty = getTypeByID(Record[0]);
- if (!Ty->isPointerTy())
- return Error("Global not a pointer type!");
- unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
- Ty = cast<PointerType>(Ty)->getElementType();
- bool isConstant = Record[1];
- GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
- unsigned Alignment = (1 << Record[4]) >> 1;
- std::string Section;
- if (Record[5]) {
- if (Record[5]-1 >= SectionTable.size())
- return Error("Invalid section ID");
- Section = SectionTable[Record[5]-1];
- }
- GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
- if (Record.size() > 6)
- Visibility = GetDecodedVisibility(Record[6]);
- bool isThreadLocal = false;
- if (Record.size() > 7)
- isThreadLocal = Record[7];
- GlobalVariable *NewGV =
- new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
- isThreadLocal, AddressSpace);
- NewGV->setAlignment(Alignment);
- if (!Section.empty())
- NewGV->setSection(Section);
- NewGV->setVisibility(Visibility);
- NewGV->setThreadLocal(isThreadLocal);
- ValueList.push_back(NewGV);
- // Remember which value to use for the global initializer.
- if (unsigned InitID = Record[2])
- GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
- break;
- }
- // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
- // alignment, section, visibility, gc]
- case bitc::MODULE_CODE_FUNCTION: {
- if (Record.size() < 8)
- return Error("Invalid MODULE_CODE_FUNCTION record");
- const Type *Ty = getTypeByID(Record[0]);
- if (!Ty->isPointerTy())
- return Error("Function not a pointer type!");
- const FunctionType *FTy =
- dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
- if (!FTy)
- return Error("Function not a pointer to function type!");
- Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
- "", TheModule);
- Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
- bool isProto = Record[2];
- Func->setLinkage(GetDecodedLinkage(Record[3]));
- Func->setAttributes(getAttributes(Record[4]));
- Func->setAlignment((1 << Record[5]) >> 1);
- if (Record[6]) {
- if (Record[6]-1 >= SectionTable.size())
- return Error("Invalid section ID");
- Func->setSection(SectionTable[Record[6]-1]);
- }
- Func->setVisibility(GetDecodedVisibility(Record[7]));
- if (Record.size() > 8 && Record[8]) {
- if (Record[8]-1 > GCTable.size())
- return Error("Invalid GC ID");
- Func->setGC(GCTable[Record[8]-1].c_str());
- }
- ValueList.push_back(Func);
- // If this is a function with a body, remember the prototype we are
- // creating now, so that we can match up the body with them later.
- if (!isProto)
- FunctionsWithBodies.push_back(Func);
- break;
- }
- // ALIAS: [alias type, aliasee val#, linkage]
- // ALIAS: [alias type, aliasee val#, linkage, visibility]
- case bitc::MODULE_CODE_ALIAS: {
- if (Record.size() < 3)
- return Error("Invalid MODULE_ALIAS record");
- const Type *Ty = getTypeByID(Record[0]);
- if (!Ty->isPointerTy())
- return Error("Function not a pointer type!");
- GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
- "", 0, TheModule);
- // Old bitcode files didn't have visibility field.
- if (Record.size() > 3)
- NewGA->setVisibility(GetDecodedVisibility(Record[3]));
- ValueList.push_back(NewGA);
- AliasInits.push_back(std::make_pair(NewGA, Record[1]));
- break;
- }
- /// MODULE_CODE_PURGEVALS: [numvals]
- case bitc::MODULE_CODE_PURGEVALS:
- // Trim down the value list to the specified size.
- if (Record.size() < 1 || Record[0] > ValueList.size())
- return Error("Invalid MODULE_PURGEVALS record");
- ValueList.shrinkTo(Record[0]);
- break;
- }
- Record.clear();
- }
- return Error("Premature end of bitstream");
- }
- bool BitcodeReader::ParseBitcodeInto(Module *M) {
- TheModule = 0;
- unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
- unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
- if (Buffer->getBufferSize() & 3) {
- if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
- return Error("Invalid bitcode signature");
- else
- return Error("Bitcode stream should be a multiple of 4 bytes in length");
- }
- // If we have a wrapper header, parse it and ignore the non-bc file contents.
- // The magic number is 0x0B17C0DE stored in little endian.
- if (isBitcodeWrapper(BufPtr, BufEnd))
- if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
- return Error("Invalid bitcode wrapper header");
- StreamFile.init(BufPtr, BufEnd);
- Stream.init(StreamFile);
- // Sniff for the signature.
- if (Stream.Read(8) != 'B' ||
- Stream.Read(8) != 'C' ||
- Stream.Read(4) != 0x0 ||
- Stream.Read(4) != 0xC ||
- Stream.Read(4) != 0xE ||
- Stream.Read(4) != 0xD)
- return Error("Invalid bitcode signature");
- // We expect a number of well-defined blocks, though we don't necessarily
- // need to understand them all.
- while (!Stream.AtEndOfStream()) {
- unsigned Code = Stream.ReadCode();
- if (Code != bitc::ENTER_SUBBLOCK)
- return Error("Invalid record at top-level");
- unsigned BlockID = Stream.ReadSubBlockID();
- // We only know the MODULE subblock ID.
- switch (BlockID) {
- case bitc::BLOCKINFO_BLOCK_ID:
- if (Stream.ReadBlockInfoBlock())
- return Error("Malformed BlockInfoBlock");
- break;
- case bitc::MODULE_BLOCK_ID:
- // Reject multiple MODULE_BLOCK's in a single bitstream.
- if (TheModule)
- return Error("Multiple MODULE_BLOCKs in same stream");
- TheModule = M;
- if (ParseModule())
- return true;
- break;
- default:
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- break;
- }
- }
- return false;
- }
- /// ParseMetadataAttachment - Parse metadata attachments.
- bool BitcodeReader::ParseMetadataAttachment() {
- if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
- return Error("Malformed block record");
- SmallVector<uint64_t, 64> Record;
- while(1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (Stream.ReadBlockEnd())
- return Error("Error at end of PARAMATTR block");
- break;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a metadata attachment record.
- Record.clear();
- switch (Stream.ReadRecord(Code, Record)) {
- default: // Default behavior: ignore.
- break;
- case bitc::METADATA_ATTACHMENT:
- // LLVM 3.0: Remove this.
- break;
- case bitc::METADATA_ATTACHMENT2: {
- unsigned RecordLength = Record.size();
- if (Record.empty() || (RecordLength - 1) % 2 == 1)
- return Error ("Invalid METADATA_ATTACHMENT reader!");
- Instruction *Inst = InstructionList[Record[0]];
- for (unsigned i = 1; i != RecordLength; i = i+2) {
- unsigned Kind = Record[i];
- DenseMap<unsigned, unsigned>::iterator I =
- MDKindMap.find(Kind);
- if (I == MDKindMap.end())
- return Error("Invalid metadata kind ID");
- Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
- Inst->setMetadata(I->second, cast<MDNode>(Node));
- }
- break;
- }
- }
- }
- return false;
- }
- /// ParseFunctionBody - Lazily parse the specified function body block.
- bool BitcodeReader::ParseFunctionBody(Function *F) {
- if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
- return Error("Malformed block record");
- InstructionList.clear();
- unsigned ModuleValueListSize = ValueList.size();
- unsigned ModuleMDValueListSize = MDValueList.size();
- // Add all the function arguments to the value table.
- for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
- ValueList.push_back(I);
- unsigned NextValueNo = ValueList.size();
- BasicBlock *CurBB = 0;
- unsigned CurBBNo = 0;
- DebugLoc LastLoc;
-
- // Read all the records.
- SmallVector<uint64_t, 64> Record;
- while (1) {
- unsigned Code = Stream.ReadCode();
- if (Code == bitc::END_BLOCK) {
- if (Stream.ReadBlockEnd())
- return Error("Error at end of function block");
- break;
- }
- if (Code == bitc::ENTER_SUBBLOCK) {
- switch (Stream.ReadSubBlockID()) {
- default: // Skip unknown content.
- if (Stream.SkipBlock())
- return Error("Malformed block record");
- break;
- case bitc::CONSTANTS_BLOCK_ID:
- if (ParseConstants()) return true;
- NextValueNo = ValueList.size();
- break;
- case bitc::VALUE_SYMTAB_BLOCK_ID:
- if (ParseValueSymbolTable()) return true;
- break;
- case bitc::METADATA_ATTACHMENT_ID:
- if (ParseMetadataAttachment()) return true;
- break;
- case bitc::METADATA_BLOCK_ID:
- if (ParseMetadata()) return true;
- break;
- }
- continue;
- }
- if (Code == bitc::DEFINE_ABBREV) {
- Stream.ReadAbbrevRecord();
- continue;
- }
- // Read a record.
- Record.clear();
- Instruction *I = 0;
- unsigned BitCode = Stream.ReadRecord(Code, Record);
- switch (BitCode) {
- default: // Default behavior: reject
- return Error("Unknown instruction");
- case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
- if (Record.size() < 1 || Record[0] == 0)
- return Error("Invalid DECLAREBLOCKS record");
- // Create all the basic blocks for the function.
- FunctionBBs.resize(Record[0]);
- for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
- FunctionBBs[i] = BasicBlock::Create(Context, "", F);
- CurBB = FunctionBBs[0];
- continue;
-
- case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
- // This record indicates that the last instruction is at the same
- // location as the previous instruction with a location.
- I = 0;
-
- // Get the last instruction emitted.
- if (CurBB && !CurBB->empty())
- I = &CurBB->back();
- else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
- !FunctionBBs[CurBBNo-1]->empty())
- I = &FunctionBBs[CurBBNo-1]->back();
-
- if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
- I->setDebugLoc(LastLoc);
- I = 0;
- continue;
-
- case bitc::FUNC_CODE_DEBUG_LOC:
- // FIXME: Ignore. Remove this in LLVM 3.0.
- continue;
- case bitc::FUNC_CODE_DEBUG_LOC2: { // DEBUG_LOC: [line, col, scope, ia]
- I = 0; // Get the last instruction emitted.
- if (CurBB && !CurBB->empty())
- I = &CurBB->back();
- else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
- !FunctionBBs[CurBBNo-1]->empty())
- I = &FunctionBBs[CurBBNo-1]->back();
- if (I == 0 || Record.size() < 4)
- return Error("Invalid FUNC_CODE_DEBUG_LOC record");
-
- unsigned Line = Record[0], Col = Record[1];
- unsigned ScopeID = Record[2], IAID = Record[3];
-
- MDNode *Scope = 0, *IA = 0;
- if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
- if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
- LastLoc = DebugLoc::get(Line, Col, Scope, IA);
- I->setDebugLoc(LastLoc);
- I = 0;
- continue;
- }
- case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
- unsigned OpNum = 0;
- Value *LHS, *RHS;
- if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
- getValue(Record, OpNum, LHS->getType(), RHS) ||
- OpNum+1 > Record.size())
- return Error("Invalid BINOP record");
- int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
- if (Opc == -1) return Error("Invalid BINOP record");
- I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
- InstructionList.push_back(I);
- if (OpNum < Record.size()) {
- if (Opc == Instruction::Add ||
- Opc == Instruction::Sub ||
- Opc == Instruction::Mul) {
- if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
- cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
- if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
- cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
- } else if (Opc == Instruction::SDiv) {
- if (Record[OpNum] & (1 << bitc::SDIV_EXACT))
- cast<BinaryOperator>(I)->setIsExact(true);
- }
- }
- break;
- }
- case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
- unsigned OpNum = 0;
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
- OpNum+2 != Record.size())
- return Error("Invalid CAST record");
- const Type *ResTy = getTypeByID(Record[OpNum]);
- int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
- if (Opc == -1 || ResTy == 0)
- return Error("Invalid CAST record");
- I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
- case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
- unsigned OpNum = 0;
- Value *BasePtr;
- if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
- return Error("Invalid GEP record");
- SmallVector<Value*, 16> GEPIdx;
- while (OpNum != Record.size()) {
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error("Invalid GEP record");
- GEPIdx.push_back(Op);
- }
- I = GetElementPtrInst::Create(BasePtr, GEPIdx.begin(), GEPIdx.end());
- InstructionList.push_back(I);
- if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
- cast<GetElementPtrInst>(I)->setIsInBounds(true);
- break;
- }
- case bitc::FUNC_CODE_INST_EXTRACTVAL: {
- // EXTRACTVAL: [opty, opval, n x indices]
- unsigned OpNum = 0;
- Value *Agg;
- if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
- return Error("Invalid EXTRACTVAL record");
- SmallVector<unsigned, 4> EXTRACTVALIdx;
- for (unsigned RecSize = Record.size();
- OpNum != RecSize; ++OpNum) {
- uint64_t Index = Record[OpNum];
- if ((unsigned)Index != Index)
- return Error("Invalid EXTRACTVAL index");
- EXTRACTVALIdx.push_back((unsigned)Index);
- }
- I = ExtractValueInst::Create(Agg,
- EXTRACTVALIdx.begin(), EXTRACTVALIdx.end());
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_INSERTVAL: {
- // INSERTVAL: [opty, opval, opty, opval, n x indices]
- unsigned OpNum = 0;
- Value *Agg;
- if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
- return Error("Invalid INSERTVAL record");
- Value *Val;
- if (getValueTypePair(Record, OpNum, NextValueNo, Val))
- return Error("Invalid INSERTVAL record");
- SmallVector<unsigned, 4> INSERTVALIdx;
- for (unsigned RecSize = Record.size();
- OpNum != RecSize; ++OpNum) {
- uint64_t Index = Record[OpNum];
- if ((unsigned)Index != Index)
- return Error("Invalid INSERTVAL index");
- INSERTVALIdx.push_back((unsigned)Index);
- }
- I = InsertValueInst::Create(Agg, Val,
- INSERTVALIdx.begin(), INSERTVALIdx.end());
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
- // obsolete form of select
- // handles select i1 ... in old bitcode
- unsigned OpNum = 0;
- Value *TrueVal, *FalseVal, *Cond;
- if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
- getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
- getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
- return Error("Invalid SELECT record");
- I = SelectInst::Create(Cond, TrueVal, FalseVal);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
- // new form of select
- // handles select i1 or select [N x i1]
- unsigned OpNum = 0;
- Value *TrueVal, *FalseVal, *Cond;
- if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
- getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
- getValueTypePair(Record, OpNum, NextValueNo, Cond))
- return Error("Invalid SELECT record");
- // select condition can be either i1 or [N x i1]
- if (const VectorType* vector_type =
- dyn_cast<const VectorType>(Cond->getType())) {
- // expect <n x i1>
- if (vector_type->getElementType() != Type::getInt1Ty(Context))
- return Error("Invalid SELECT condition type");
- } else {
- // expect i1
- if (Cond->getType() != Type::getInt1Ty(Context))
- return Error("Invalid SELECT condition type");
- }
- I = SelectInst::Create(Cond, TrueVal, FalseVal);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
- unsigned OpNum = 0;
- Value *Vec, *Idx;
- if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
- getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
- return Error("Invalid EXTRACTELT record");
- I = ExtractElementInst::Create(Vec, Idx);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
- unsigned OpNum = 0;
- Value *Vec, *Elt, *Idx;
- if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
- getValue(Record, OpNum,
- cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
- getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
- return Error("Invalid INSERTELT record");
- I = InsertElementInst::Create(Vec, Elt, Idx);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
- unsigned OpNum = 0;
- Value *Vec1, *Vec2, *Mask;
- if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
- getValue(Record, OpNum, Vec1->getType(), Vec2))
- return Error("Invalid SHUFFLEVEC record");
- if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
- return Error("Invalid SHUFFLEVEC record");
- I = new ShuffleVectorInst(Vec1, Vec2, Mask);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
- // Old form of ICmp/FCmp returning bool
- // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
- // both legal on vectors but had different behaviour.
- case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
- // FCmp/ICmp returning bool or vector of bool
- unsigned OpNum = 0;
- Value *LHS, *RHS;
- if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
- getValue(Record, OpNum, LHS->getType(), RHS) ||
- OpNum+1 != Record.size())
- return Error("Invalid CMP record");
- if (LHS->getType()->isFPOrFPVectorTy())
- I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
- else
- I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_GETRESULT: { // GETRESULT: [ty, val, n]
- if (Record.size() != 2)
- return Error("Invalid GETRESULT record");
- unsigned OpNum = 0;
- Value *Op;
- getValueTypePair(Record, OpNum, NextValueNo, Op);
- unsigned Index = Record[1];
- I = ExtractValueInst::Create(Op, Index);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
- {
- unsigned Size = Record.size();
- if (Size == 0) {
- I = ReturnInst::Create(Context);
- InstructionList.push_back(I);
- break;
- }
- unsigned OpNum = 0;
- SmallVector<Value *,4> Vs;
- do {
- Value *Op = NULL;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error("Invalid RET record");
- Vs.push_back(Op);
- } while(OpNum != Record.size());
- const Type *ReturnType = F->getReturnType();
- // Handle multiple return values. FIXME: Remove in LLVM 3.0.
- if (Vs.size() > 1 ||
- (ReturnType->isStructTy() &&
- (Vs.empty() || Vs[0]->getType() != ReturnType))) {
- Value *RV = UndefValue::get(ReturnType);
- for (unsigned i = 0, e = Vs.size(); i != e; ++i) {
- I = InsertValueInst::Create(RV, Vs[i], i, "mrv");
- InstructionList.push_back(I);
- CurBB->getInstList().push_back(I);
- ValueList.AssignValue(I, NextValueNo++);
- RV = I;
- }
- I = ReturnInst::Create(Context, RV);
- InstructionList.push_back(I);
- break;
- }
- I = ReturnInst::Create(Context, Vs[0]);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
- if (Record.size() != 1 && Record.size() != 3)
- return Error("Invalid BR record");
- BasicBlock *TrueDest = getBasicBlock(Record[0]);
- if (TrueDest == 0)
- return Error("Invalid BR record");
- if (Record.size() == 1) {
- I = BranchInst::Create(TrueDest);
- InstructionList.push_back(I);
- }
- else {
- BasicBlock *FalseDest = getBasicBlock(Record[1]);
- Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
- if (FalseDest == 0 || Cond == 0)
- return Error("Invalid BR record");
- I = BranchInst::Create(TrueDest, FalseDest, Cond);
- InstructionList.push_back(I);
- }
- break;
- }
- case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
- if (Record.size() < 3 || (Record.size() & 1) == 0)
- return Error("Invalid SWITCH record");
- const Type *OpTy = getTypeByID(Record[0]);
- Value *Cond = getFnValueByID(Record[1], OpTy);
- BasicBlock *Default = getBasicBlock(Record[2]);
- if (OpTy == 0 || Cond == 0 || Default == 0)
- return Error("Invalid SWITCH record");
- unsigned NumCases = (Record.size()-3)/2;
- SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
- InstructionList.push_back(SI);
- for (unsigned i = 0, e = NumCases; i != e; ++i) {
- ConstantInt *CaseVal =
- dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
- BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
- if (CaseVal == 0 || DestBB == 0) {
- delete SI;
- return Error("Invalid SWITCH record!");
- }
- SI->addCase(CaseVal, DestBB);
- }
- I = SI;
- break;
- }
- case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
- if (Record.size() < 2)
- return Error("Invalid INDIRECTBR record");
- const Type *OpTy = getTypeByID(Record[0]);
- Value *Address = getFnValueByID(Record[1], OpTy);
- if (OpTy == 0 || Address == 0)
- return Error("Invalid INDIRECTBR record");
- unsigned NumDests = Record.size()-2;
- IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
- InstructionList.push_back(IBI);
- for (unsigned i = 0, e = NumDests; i != e; ++i) {
- if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
- IBI->addDestination(DestBB);
- } else {
- delete IBI;
- return Error("Invalid INDIRECTBR record!");
- }
- }
- I = IBI;
- break;
- }
-
- case bitc::FUNC_CODE_INST_INVOKE: {
- // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
- if (Record.size() < 4) return Error("Invalid INVOKE record");
- AttrListPtr PAL = getAttributes(Record[0]);
- unsigned CCInfo = Record[1];
- BasicBlock *NormalBB = getBasicBlock(Record[2]);
- BasicBlock *UnwindBB = getBasicBlock(Record[3]);
- unsigned OpNum = 4;
- Value *Callee;
- if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
- return Error("Invalid INVOKE record");
- const PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
- const FunctionType *FTy = !CalleeTy ? 0 :
- dyn_cast<FunctionType>(CalleeTy->getElementType());
- // Check that the right number of fixed parameters are here.
- if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
- Record.size() < OpNum+FTy->getNumParams())
- return Error("Invalid INVOKE record");
- SmallVector<Value*, 16> Ops;
- for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
- Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
- if (Ops.back() == 0) return Error("Invalid INVOKE record");
- }
- if (!FTy->isVarArg()) {
- if (Record.size() != OpNum)
- return Error("Invalid INVOKE record");
- } else {
- // Read type/value pairs for varargs params.
- while (OpNum != Record.size()) {
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error("Invalid INVOKE record");
- Ops.push_back(Op);
- }
- }
- I = InvokeInst::Create(Callee, NormalBB, UnwindBB,
- Ops.begin(), Ops.end());
- InstructionList.push_back(I);
- cast<InvokeInst>(I)->setCallingConv(
- static_cast<CallingConv::ID>(CCInfo));
- cast<InvokeInst>(I)->setAttributes(PAL);
- break;
- }
- case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
- I = new UnwindInst(Context);
- InstructionList.push_back(I);
- break;
- case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
- I = new UnreachableInst(Context);
- InstructionList.push_back(I);
- break;
- case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
- if (Record.size() < 1 || ((Record.size()-1)&1))
- return Error("Invalid PHI record");
- const Type *Ty = getTypeByID(Record[0]);
- if (!Ty) return Error("Invalid PHI record");
- PHINode *PN = PHINode::Create(Ty);
- InstructionList.push_back(PN);
- PN->reserveOperandSpace((Record.size()-1)/2);
- for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
- Value *V = getFnValueByID(Record[1+i], Ty);
- BasicBlock *BB = getBasicBlock(Record[2+i]);
- if (!V || !BB) return Error("Invalid PHI record");
- PN->addIncoming(V, BB);
- }
- I = PN;
- break;
- }
- case bitc::FUNC_CODE_INST_MALLOC: { // MALLOC: [instty, op, align]
- // Autoupgrade malloc instruction to malloc call.
- // FIXME: Remove in LLVM 3.0.
- if (Record.size() < 3)
- return Error("Invalid MALLOC record");
- const PointerType *Ty =
- dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
- Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
- if (!Ty || !Size) return Error("Invalid MALLOC record");
- if (!CurBB) return Error("Invalid malloc instruction with no BB");
- const Type *Int32Ty = IntegerType::getInt32Ty(CurBB->getContext());
- Constant *AllocSize = ConstantExpr::getSizeOf(Ty->getElementType());
- AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, Int32Ty);
- I = CallInst::CreateMalloc(CurBB, Int32Ty, Ty->getElementType(),
- AllocSize, Size, NULL);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_FREE: { // FREE: [op, opty]
- unsigned OpNum = 0;
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
- OpNum != Record.size())
- return Error("Invalid FREE record");
- if (!CurBB) return Error("Invalid free instruction with no BB");
- I = CallInst::CreateFree(Op, CurBB);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
- // For backward compatibility, tolerate a lack of an opty, and use i32.
- // LLVM 3.0: Remove this.
- if (Record.size() < 3 || Record.size() > 4)
- return Error("Invalid ALLOCA record");
- unsigned OpNum = 0;
- const PointerType *Ty =
- dyn_cast_or_null<PointerType>(getTypeByID(Record[OpNum++]));
- const Type *OpTy = Record.size() == 4 ? getTypeByID(Record[OpNum++]) :
- Type::getInt32Ty(Context);
- Value *Size = getFnValueByID(Record[OpNum++], OpTy);
- unsigned Align = Record[OpNum++];
- if (!Ty || !Size) return Error("Invalid ALLOCA record");
- I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
- unsigned OpNum = 0;
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
- OpNum+2 != Record.size())
- return Error("Invalid LOAD record");
- I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_STORE2: { // STORE2:[ptrty, ptr, val, align, vol]
- unsigned OpNum = 0;
- Value *Val, *Ptr;
- if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
- getValue(Record, OpNum,
- cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
- OpNum+2 != Record.size())
- return Error("Invalid STORE record");
- I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_STORE: { // STORE:[val, valty, ptr, align, vol]
- // FIXME: Legacy form of store instruction. Should be removed in LLVM 3.0.
- unsigned OpNum = 0;
- Value *Val, *Ptr;
- if (getValueTypePair(Record, OpNum, NextValueNo, Val) ||
- getValue(Record, OpNum,
- PointerType::getUnqual(Val->getType()), Ptr)||
- OpNum+2 != Record.size())
- return Error("Invalid STORE record");
- I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_CALL:
- case bitc::FUNC_CODE_INST_CALL2: {
- // FIXME: Legacy support for the old call instruction, where function-local
- // metadata operands were bogus. Remove in LLVM 3.0.
- bool DropMetadata = BitCode == bitc::FUNC_CODE_INST_CALL;
- // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
- if (Record.size() < 3)
- return Error("Invalid CALL record");
- AttrListPtr PAL = getAttributes(Record[0]);
- unsigned CCInfo = Record[1];
- unsigned OpNum = 2;
- Value *Callee;
- if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
- return Error("Invalid CALL record");
- const PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
- const FunctionType *FTy = 0;
- if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
- if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
- return Error("Invalid CALL record");
- SmallVector<Value*, 16> Args;
- // Read the fixed params.
- for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
- if (FTy->getParamType(i)->getTypeID()==Type::LabelTyID)
- Args.push_back(getBasicBlock(Record[OpNum]));
- else if (DropMetadata &&
- FTy->getParamType(i)->getTypeID()==Type::MetadataTyID) {
- // LLVM 2.7 compatibility: drop metadata arguments to null.
- Value *Ops = 0;
- Args.push_back(MDNode::get(Context, &Ops, 1));
- continue;
- } else
- Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
- if (Args.back() == 0) return Error("Invalid CALL record");
- }
- // Read type/value pairs for varargs params.
- if (!FTy->isVarArg()) {
- if (OpNum != Record.size())
- return Error("Invalid CALL record");
- } else {
- while (OpNum != Record.size()) {
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error("Invalid CALL record");
- Args.push_back(Op);
- }
- }
- I = CallInst::Create(Callee, Args.begin(), Args.end());
- InstructionList.push_back(I);
- cast<CallInst>(I)->setCallingConv(
- static_cast<CallingConv::ID>(CCInfo>>1));
- cast<CallInst>(I)->setTailCall(CCInfo & 1);
- cast<CallInst>(I)->setAttributes(PAL);
- break;
- }
- case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
- if (Record.size() < 3)
- return Error("Invalid VAARG record");
- const Type *OpTy = getTypeByID(Record[0]);
- Value *Op = getFnValueByID(Record[1], OpTy);
- const Type *ResTy = getTypeByID(Record[2]);
- if (!OpTy || !Op || !ResTy)
- return Error("Invalid VAARG record");
- I = new VAArgInst(Op, ResTy);
- InstructionList.push_back(I);
- break;
- }
- }
- // Add instruction to end of current BB. If there is no current BB, reject
- // this file.
- if (CurBB == 0) {
- delete I;
- return Error("Invalid instruction with no BB");
- }
- CurBB->getInstList().push_back(I);
- // If this was a terminator instruction, move to the next block.
- if (isa<TerminatorInst>(I)) {
- ++CurBBNo;
- CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
- }
- // Non-void values get registered in the value table for future use.
- if (I && !I->getType()->isVoidTy())
- ValueList.AssignValue(I, NextValueNo++);
- }
- // Check the function list for unresolved values.
- if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
- if (A->getParent() == 0) {
- // We found at least one unresolved value. Nuke them all to avoid leaks.
- for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
- if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
- A->replaceAllUsesWith(UndefValue::get(A->getType()));
- delete A;
- }
- }
- return Error("Never resolved value found in function!");
- }
- }
- // FIXME: Check for unresolved forward-declared metadata references
- // and clean up leaks.
- // See if anything took the address of blocks in this function. If so,
- // resolve them now.
- DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
- BlockAddrFwdRefs.find(F);
- if (BAFRI != BlockAddrFwdRefs.end()) {
- std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
- for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
- unsigned BlockIdx = RefList[i].first;
- if (BlockIdx >= FunctionBBs.size())
- return Error("Invalid blockaddress block #");
-
- GlobalVariable *FwdRef = RefList[i].second;
- FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
- FwdRef->eraseFromParent();
- }
-
- BlockAddrFwdRefs.erase(BAFRI);
- }
-
- // Trim the value list down to the size it was before we parsed this function.
- ValueList.shrinkTo(ModuleValueListSize);
- MDValueList.shrinkTo(ModuleMDValueListSize);
- std::vector<BasicBlock*>().swap(FunctionBBs);
- return false;
- }
- //===----------------------------------------------------------------------===//
- // GVMaterializer implementation
- //===----------------------------------------------------------------------===//
- bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
- if (const Function *F = dyn_cast<Function>(GV)) {
- return F->isDeclaration() &&
- DeferredFunctionInfo.count(const_cast<Function*>(F));
- }
- return false;
- }
- bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
- Function *F = dyn_cast<Function>(GV);
- // If it's not a function or is already material, ignore the request.
- if (!F || !F->isMaterializable()) return false;
- DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
- assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
- // Move the bit stream to the saved position of the deferred function body.
- Stream.JumpToBit(DFII->second);
- if (ParseFunctionBody(F)) {
- if (ErrInfo) *ErrInfo = ErrorString;
- return true;
- }
- // Upgrade any old intrinsic calls in the function.
- for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
- E = UpgradedIntrinsics.end(); I != E; ++I) {
- if (I->first != I->second) {
- for (Value::use_iterator UI = I->first->use_begin(),
- UE = I->first->use_end(); UI != UE; ) {
- if (CallInst* CI = dyn_cast<CallInst>(*UI++))
- UpgradeIntrinsicCall(CI, I->second);
- }
- }
- }
- return false;
- }
- bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
- const Function *F = dyn_cast<Function>(GV);
- if (!F || F->isDeclaration())
- return false;
- return DeferredFunctionInfo.count(const_cast<Function*>(F));
- }
- void BitcodeReader::Dematerialize(GlobalValue *GV) {
- Function *F = dyn_cast<Function>(GV);
- // If this function isn't dematerializable, this is a noop.
- if (!F || !isDematerializable(F))
- return;
- assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
- // Just forget the function body, we can remat it later.
- F->deleteBody();
- }
- bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
- assert(M == TheModule &&
- "Can only Materialize the Module this BitcodeReader is attached to.");
- // Iterate over the module, deserializing any functions that are still on
- // disk.
- for (Module::iterator F = TheModule->begin(), E = TheModule->end();
- F != E; ++F)
- if (F->isMaterializable() &&
- Materialize(F, ErrInfo))
- return true;
- // Upgrade any intrinsic calls that slipped through (should not happen!) and
- // delete the old functions to clean up. We can't do this unless the entire
- // module is materialized because there could always be another function body
- // with calls to the old function.
- for (std::vector<std::pair<Function*, Function*> >::iterator I =
- UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
- if (I->first != I->second) {
- for (Value::use_iterator UI = I->first->use_begin(),
- UE = I->first->use_end(); UI != UE; ) {
- if (CallInst* CI = dyn_cast<CallInst>(*UI++))
- UpgradeIntrinsicCall(CI, I->second);
- }
- if (!I->first->use_empty())
- I->first->replaceAllUsesWith(I->second);
- I->first->eraseFromParent();
- }
- }
- std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
- // Check debug info intrinsics.
- CheckDebugInfoIntrinsics(TheModule);
- return false;
- }
- //===----------------------------------------------------------------------===//
- // External interface
- //===----------------------------------------------------------------------===//
- /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
- ///
- Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
- LLVMContext& Context,
- std::string *ErrMsg) {
- Module *M = new Module(Buffer->getBufferIdentifier(), Context);
- BitcodeReader *R = new BitcodeReader(Buffer, Context);
- M->setMaterializer(R);
- if (R->ParseBitcodeInto(M)) {
- if (ErrMsg)
- *ErrMsg = R->getErrorString();
- delete M; // Also deletes R.
- return 0;
- }
- // Have the BitcodeReader dtor delete 'Buffer'.
- R->setBufferOwned(true);
- return M;
- }
- /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
- /// If an error occurs, return null and fill in *ErrMsg if non-null.
- Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
- std::string *ErrMsg){
- Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
- if (!M) return 0;
- // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
- // there was an error.
- static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
- // Read in the entire module, and destroy the BitcodeReader.
- if (M->MaterializeAllPermanently(ErrMsg)) {
- delete M;
- return NULL;
- }
- return M;
- }
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