/3rd_party/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
C++ | 3351 lines | 2729 code | 351 blank | 271 comment | 828 complexity | 047c2444de5bfa66801c5f22cbfe7456 MD5 | raw file
Possible License(s): LGPL-2.1, BSD-3-Clause, JSON, MPL-2.0-no-copyleft-exception, GPL-2.0, GPL-3.0, LGPL-3.0, BSD-2-Clause
- //===- 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.
- //
- //===----------------------------------------------------------------------===//
- #include "llvm/Bitcode/ReaderWriter.h"
- #include "BitcodeReader.h"
- #include "llvm/ADT/SmallString.h"
- #include "llvm/ADT/SmallVector.h"
- #include "llvm/AutoUpgrade.h"
- #include "llvm/Bitcode/LLVMBitCodes.h"
- #include "llvm/IR/Constants.h"
- #include "llvm/IR/DerivedTypes.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/Support/DataStream.h"
- #include "llvm/Support/MathExtras.h"
- #include "llvm/Support/MemoryBuffer.h"
- #include "llvm/Support/raw_ostream.h"
- using namespace llvm;
- enum {
- SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
- };
- void BitcodeReader::materializeForwardReferencedFunctions() {
- while (!BlockAddrFwdRefs.empty()) {
- Function *F = BlockAddrFwdRefs.begin()->first;
- F->Materialize();
- }
- }
- void BitcodeReader::FreeState() {
- if (BufferOwned)
- delete Buffer;
- Buffer = 0;
- std::vector<Type*>().swap(TypeList);
- ValueList.clear();
- MDValueList.clear();
- std::vector<AttributeSet>().swap(MAttributes);
- std::vector<BasicBlock*>().swap(FunctionBBs);
- std::vector<Function*>().swap(FunctionsWithBodies);
- DeferredFunctionInfo.clear();
- MDKindMap.clear();
- assert(BlockAddrFwdRefs.empty() && "Unresolved blockaddress fwd references");
- }
- //===----------------------------------------------------------------------===//
- // 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(ArrayRef<uint64_t> 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;
- }
- }
- 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 GlobalVariable::ThreadLocalMode GetDecodedThreadLocalMode(unsigned Val) {
- switch (Val) {
- case 0: return GlobalVariable::NotThreadLocal;
- default: // Map unknown non-zero value to general dynamic.
- case 1: return GlobalVariable::GeneralDynamicTLSModel;
- case 2: return GlobalVariable::LocalDynamicTLSModel;
- case 3: return GlobalVariable::InitialExecTLSModel;
- case 4: return GlobalVariable::LocalExecTLSModel;
- }
- }
- 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;
- case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
- }
- }
- static int GetDecodedBinaryOpcode(unsigned Val, 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;
- }
- }
- static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
- switch (Val) {
- default: return AtomicRMWInst::BAD_BINOP;
- case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
- case bitc::RMW_ADD: return AtomicRMWInst::Add;
- case bitc::RMW_SUB: return AtomicRMWInst::Sub;
- case bitc::RMW_AND: return AtomicRMWInst::And;
- case bitc::RMW_NAND: return AtomicRMWInst::Nand;
- case bitc::RMW_OR: return AtomicRMWInst::Or;
- case bitc::RMW_XOR: return AtomicRMWInst::Xor;
- case bitc::RMW_MAX: return AtomicRMWInst::Max;
- case bitc::RMW_MIN: return AtomicRMWInst::Min;
- case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
- case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
- }
- }
- static AtomicOrdering GetDecodedOrdering(unsigned Val) {
- switch (Val) {
- case bitc::ORDERING_NOTATOMIC: return NotAtomic;
- case bitc::ORDERING_UNORDERED: return Unordered;
- case bitc::ORDERING_MONOTONIC: return Monotonic;
- case bitc::ORDERING_ACQUIRE: return Acquire;
- case bitc::ORDERING_RELEASE: return Release;
- case bitc::ORDERING_ACQREL: return AcquireRelease;
- default: // Map unknown orderings to sequentially-consistent.
- case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
- }
- }
- static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
- switch (Val) {
- case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
- default: // Map unknown scopes to cross-thread.
- case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
- }
- }
- 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 &) LLVM_DELETED_FUNCTION;
- public:
- // allocate space for exactly one operand
- void *operator new(size_t s) {
- return User::operator new(s, 1);
- }
- explicit ConstantPlaceHolder(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 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<ConstantPlaceHolder, 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,
- 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, 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);
- } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
- NewC = ConstantStruct::get(UserCS->getType(), NewOps);
- } else if (isa<ConstantVector>(UserC)) {
- NewC = ConstantVector::get(NewOps);
- } else {
- assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
- NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
- }
- 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, None);
- MDValuePtrs[Idx] = V;
- return V;
- }
- Type *BitcodeReader::getTypeByID(unsigned ID) {
- // The type table size is always specified correctly.
- if (ID >= TypeList.size())
- return 0;
- if (Type *Ty = TypeList[ID])
- return Ty;
- // If we have a forward reference, the only possible case is when it is to a
- // named struct. Just create a placeholder for now.
- return TypeList[ID] = StructType::create(Context);
- }
- //===----------------------------------------------------------------------===//
- // Functions for parsing blocks from the bitcode file
- //===----------------------------------------------------------------------===//
- /// \brief This fills an AttrBuilder object with the LLVM attributes that have
- /// been decoded from the given integer. This function must stay in sync with
- /// 'encodeLLVMAttributesForBitcode'.
- static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
- uint64_t EncodedAttrs) {
- // FIXME: Remove in 4.0.
- // 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 = (EncodedAttrs & (0xffffULL << 16)) >> 16;
- assert((!Alignment || isPowerOf2_32(Alignment)) &&
- "Alignment must be a power of two.");
- if (Alignment)
- B.addAlignmentAttr(Alignment);
- B.addRawValue(((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
- (EncodedAttrs & 0xffff));
- }
- error_code BitcodeReader::ParseAttributeBlock() {
- if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
- return Error(InvalidRecord);
- if (!MAttributes.empty())
- return Error(InvalidMultipleBlocks);
- SmallVector<uint64_t, 64> Record;
- SmallVector<AttributeSet, 8> Attrs;
- // Read all the records.
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- Record.clear();
- switch (Stream.readRecord(Entry.ID, Record)) {
- default: // Default behavior: ignore.
- break;
- case bitc::PARAMATTR_CODE_ENTRY_OLD: { // ENTRY: [paramidx0, attr0, ...]
- // FIXME: Remove in 4.0.
- if (Record.size() & 1)
- return Error(InvalidRecord);
- for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
- AttrBuilder B;
- decodeLLVMAttributesForBitcode(B, Record[i+1]);
- Attrs.push_back(AttributeSet::get(Context, Record[i], B));
- }
- MAttributes.push_back(AttributeSet::get(Context, Attrs));
- Attrs.clear();
- break;
- }
- case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [attrgrp0, attrgrp1, ...]
- for (unsigned i = 0, e = Record.size(); i != e; ++i)
- Attrs.push_back(MAttributeGroups[Record[i]]);
- MAttributes.push_back(AttributeSet::get(Context, Attrs));
- Attrs.clear();
- break;
- }
- }
- }
- }
- // Returns Attribute::None on unrecognized codes.
- static Attribute::AttrKind GetAttrFromCode(uint64_t Code) {
- switch (Code) {
- default:
- return Attribute::None;
- case bitc::ATTR_KIND_ALIGNMENT:
- return Attribute::Alignment;
- case bitc::ATTR_KIND_ALWAYS_INLINE:
- return Attribute::AlwaysInline;
- case bitc::ATTR_KIND_BUILTIN:
- return Attribute::Builtin;
- case bitc::ATTR_KIND_BY_VAL:
- return Attribute::ByVal;
- case bitc::ATTR_KIND_COLD:
- return Attribute::Cold;
- case bitc::ATTR_KIND_INLINE_HINT:
- return Attribute::InlineHint;
- case bitc::ATTR_KIND_IN_REG:
- return Attribute::InReg;
- case bitc::ATTR_KIND_MIN_SIZE:
- return Attribute::MinSize;
- case bitc::ATTR_KIND_NAKED:
- return Attribute::Naked;
- case bitc::ATTR_KIND_NEST:
- return Attribute::Nest;
- case bitc::ATTR_KIND_NO_ALIAS:
- return Attribute::NoAlias;
- case bitc::ATTR_KIND_NO_BUILTIN:
- return Attribute::NoBuiltin;
- case bitc::ATTR_KIND_NO_CAPTURE:
- return Attribute::NoCapture;
- case bitc::ATTR_KIND_NO_DUPLICATE:
- return Attribute::NoDuplicate;
- case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
- return Attribute::NoImplicitFloat;
- case bitc::ATTR_KIND_NO_INLINE:
- return Attribute::NoInline;
- case bitc::ATTR_KIND_NON_LAZY_BIND:
- return Attribute::NonLazyBind;
- case bitc::ATTR_KIND_NO_RED_ZONE:
- return Attribute::NoRedZone;
- case bitc::ATTR_KIND_NO_RETURN:
- return Attribute::NoReturn;
- case bitc::ATTR_KIND_NO_UNWIND:
- return Attribute::NoUnwind;
- case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
- return Attribute::OptimizeForSize;
- case bitc::ATTR_KIND_OPTIMIZE_NONE:
- return Attribute::OptimizeNone;
- case bitc::ATTR_KIND_READ_NONE:
- return Attribute::ReadNone;
- case bitc::ATTR_KIND_READ_ONLY:
- return Attribute::ReadOnly;
- case bitc::ATTR_KIND_RETURNED:
- return Attribute::Returned;
- case bitc::ATTR_KIND_RETURNS_TWICE:
- return Attribute::ReturnsTwice;
- case bitc::ATTR_KIND_S_EXT:
- return Attribute::SExt;
- case bitc::ATTR_KIND_STACK_ALIGNMENT:
- return Attribute::StackAlignment;
- case bitc::ATTR_KIND_STACK_PROTECT:
- return Attribute::StackProtect;
- case bitc::ATTR_KIND_STACK_PROTECT_REQ:
- return Attribute::StackProtectReq;
- case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
- return Attribute::StackProtectStrong;
- case bitc::ATTR_KIND_STRUCT_RET:
- return Attribute::StructRet;
- case bitc::ATTR_KIND_SANITIZE_ADDRESS:
- return Attribute::SanitizeAddress;
- case bitc::ATTR_KIND_SANITIZE_THREAD:
- return Attribute::SanitizeThread;
- case bitc::ATTR_KIND_SANITIZE_MEMORY:
- return Attribute::SanitizeMemory;
- case bitc::ATTR_KIND_UW_TABLE:
- return Attribute::UWTable;
- case bitc::ATTR_KIND_Z_EXT:
- return Attribute::ZExt;
- }
- }
- error_code BitcodeReader::ParseAttrKind(uint64_t Code,
- Attribute::AttrKind *Kind) {
- *Kind = GetAttrFromCode(Code);
- if (*Kind == Attribute::None)
- return Error(InvalidValue);
- return error_code::success();
- }
- error_code BitcodeReader::ParseAttributeGroupBlock() {
- if (Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
- return Error(InvalidRecord);
- if (!MAttributeGroups.empty())
- return Error(InvalidMultipleBlocks);
- SmallVector<uint64_t, 64> Record;
- // Read all the records.
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- Record.clear();
- switch (Stream.readRecord(Entry.ID, Record)) {
- default: // Default behavior: ignore.
- break;
- case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
- if (Record.size() < 3)
- return Error(InvalidRecord);
- uint64_t GrpID = Record[0];
- uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
- AttrBuilder B;
- for (unsigned i = 2, e = Record.size(); i != e; ++i) {
- if (Record[i] == 0) { // Enum attribute
- Attribute::AttrKind Kind;
- if (error_code EC = ParseAttrKind(Record[++i], &Kind))
- return EC;
- B.addAttribute(Kind);
- } else if (Record[i] == 1) { // Align attribute
- Attribute::AttrKind Kind;
- if (error_code EC = ParseAttrKind(Record[++i], &Kind))
- return EC;
- if (Kind == Attribute::Alignment)
- B.addAlignmentAttr(Record[++i]);
- else
- B.addStackAlignmentAttr(Record[++i]);
- } else { // String attribute
- assert((Record[i] == 3 || Record[i] == 4) &&
- "Invalid attribute group entry");
- bool HasValue = (Record[i++] == 4);
- SmallString<64> KindStr;
- SmallString<64> ValStr;
- while (Record[i] != 0 && i != e)
- KindStr += Record[i++];
- assert(Record[i] == 0 && "Kind string not null terminated");
- if (HasValue) {
- // Has a value associated with it.
- ++i; // Skip the '0' that terminates the "kind" string.
- while (Record[i] != 0 && i != e)
- ValStr += Record[i++];
- assert(Record[i] == 0 && "Value string not null terminated");
- }
- B.addAttribute(KindStr.str(), ValStr.str());
- }
- }
- MAttributeGroups[GrpID] = AttributeSet::get(Context, Idx, B);
- break;
- }
- }
- }
- }
- error_code BitcodeReader::ParseTypeTable() {
- if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
- return Error(InvalidRecord);
- return ParseTypeTableBody();
- }
- error_code BitcodeReader::ParseTypeTableBody() {
- if (!TypeList.empty())
- return Error(InvalidMultipleBlocks);
- SmallVector<uint64_t, 64> Record;
- unsigned NumRecords = 0;
- SmallString<64> TypeName;
- // Read all the records for this type table.
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- if (NumRecords != TypeList.size())
- return Error(MalformedBlock);
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- Record.clear();
- Type *ResultTy = 0;
- switch (Stream.readRecord(Entry.ID, Record)) {
- default:
- return Error(InvalidValue);
- 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(InvalidRecord);
- TypeList.resize(Record[0]);
- continue;
- case bitc::TYPE_CODE_VOID: // VOID
- ResultTy = Type::getVoidTy(Context);
- break;
- case bitc::TYPE_CODE_HALF: // HALF
- ResultTy = Type::getHalfTy(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_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(InvalidRecord);
- 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(InvalidRecord);
- unsigned AddressSpace = 0;
- if (Record.size() == 2)
- AddressSpace = Record[1];
- ResultTy = getTypeByID(Record[0]);
- if (ResultTy == 0)
- return Error(InvalidType);
- ResultTy = PointerType::get(ResultTy, AddressSpace);
- break;
- }
- case bitc::TYPE_CODE_FUNCTION_OLD: {
- // FIXME: attrid is dead, remove it in LLVM 4.0
- // FUNCTION: [vararg, attrid, retty, paramty x N]
- if (Record.size() < 3)
- return Error(InvalidRecord);
- SmallVector<Type*, 8> ArgTys;
- for (unsigned i = 3, e = Record.size(); i != e; ++i) {
- if (Type *T = getTypeByID(Record[i]))
- ArgTys.push_back(T);
- else
- break;
- }
- ResultTy = getTypeByID(Record[2]);
- if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
- return Error(InvalidType);
- ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
- break;
- }
- case bitc::TYPE_CODE_FUNCTION: {
- // FUNCTION: [vararg, retty, paramty x N]
- if (Record.size() < 2)
- return Error(InvalidRecord);
- SmallVector<Type*, 8> ArgTys;
- for (unsigned i = 2, e = Record.size(); i != e; ++i) {
- if (Type *T = getTypeByID(Record[i]))
- ArgTys.push_back(T);
- else
- break;
- }
- ResultTy = getTypeByID(Record[1]);
- if (ResultTy == 0 || ArgTys.size() < Record.size()-2)
- return Error(InvalidType);
- ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
- break;
- }
- case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
- if (Record.size() < 1)
- return Error(InvalidRecord);
- SmallVector<Type*, 8> EltTys;
- for (unsigned i = 1, e = Record.size(); i != e; ++i) {
- if (Type *T = getTypeByID(Record[i]))
- EltTys.push_back(T);
- else
- break;
- }
- if (EltTys.size() != Record.size()-1)
- return Error(InvalidType);
- ResultTy = StructType::get(Context, EltTys, Record[0]);
- break;
- }
- case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
- if (ConvertToString(Record, 0, TypeName))
- return Error(InvalidRecord);
- continue;
- case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
- if (Record.size() < 1)
- return Error(InvalidRecord);
- if (NumRecords >= TypeList.size())
- return Error(InvalidTYPETable);
- // Check to see if this was forward referenced, if so fill in the temp.
- StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
- if (Res) {
- Res->setName(TypeName);
- TypeList[NumRecords] = 0;
- } else // Otherwise, create a new struct.
- Res = StructType::create(Context, TypeName);
- TypeName.clear();
- SmallVector<Type*, 8> EltTys;
- for (unsigned i = 1, e = Record.size(); i != e; ++i) {
- if (Type *T = getTypeByID(Record[i]))
- EltTys.push_back(T);
- else
- break;
- }
- if (EltTys.size() != Record.size()-1)
- return Error(InvalidRecord);
- Res->setBody(EltTys, Record[0]);
- ResultTy = Res;
- break;
- }
- case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
- if (Record.size() != 1)
- return Error(InvalidRecord);
- if (NumRecords >= TypeList.size())
- return Error(InvalidTYPETable);
- // Check to see if this was forward referenced, if so fill in the temp.
- StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
- if (Res) {
- Res->setName(TypeName);
- TypeList[NumRecords] = 0;
- } else // Otherwise, create a new struct with no body.
- Res = StructType::create(Context, TypeName);
- TypeName.clear();
- ResultTy = Res;
- break;
- }
- case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
- if (Record.size() < 2)
- return Error(InvalidRecord);
- if ((ResultTy = getTypeByID(Record[1])))
- ResultTy = ArrayType::get(ResultTy, Record[0]);
- else
- return Error(InvalidType);
- break;
- case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
- if (Record.size() < 2)
- return Error(InvalidRecord);
- if ((ResultTy = getTypeByID(Record[1])))
- ResultTy = VectorType::get(ResultTy, Record[0]);
- else
- return Error(InvalidType);
- break;
- }
- if (NumRecords >= TypeList.size())
- return Error(InvalidTYPETable);
- assert(ResultTy && "Didn't read a type?");
- assert(TypeList[NumRecords] == 0 && "Already read type?");
- TypeList[NumRecords++] = ResultTy;
- }
- }
- error_code BitcodeReader::ParseValueSymbolTable() {
- if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
- return Error(InvalidRecord);
- SmallVector<uint64_t, 64> Record;
- // Read all the records for this value table.
- SmallString<128> ValueName;
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- Record.clear();
- switch (Stream.readRecord(Entry.ID, 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(InvalidRecord);
- unsigned ValueID = Record[0];
- if (ValueID >= ValueList.size())
- return Error(InvalidRecord);
- 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(InvalidRecord);
- BasicBlock *BB = getBasicBlock(Record[0]);
- if (BB == 0)
- return Error(InvalidRecord);
- BB->setName(StringRef(ValueName.data(), ValueName.size()));
- ValueName.clear();
- break;
- }
- }
- }
- }
- error_code BitcodeReader::ParseMetadata() {
- unsigned NextMDValueNo = MDValueList.size();
- if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
- return Error(InvalidRecord);
- SmallVector<uint64_t, 64> Record;
- // Read all the records.
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- bool IsFunctionLocal = false;
- // Read a record.
- Record.clear();
- unsigned Code = Stream.readRecord(Entry.ID, Record);
- switch (Code) {
- default: // Default behavior: ignore.
- break;
- case bitc::METADATA_NAME: {
- // Read name of the named metadata.
- SmallString<8> Name(Record.begin(), Record.end());
- Record.clear();
- Code = Stream.ReadCode();
- // METADATA_NAME is always followed by METADATA_NAMED_NODE.
- unsigned NextBitCode = Stream.readRecord(Code, Record);
- assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
- // 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(InvalidRecord);
- NMD->addOperand(MD);
- }
- break;
- }
- case bitc::METADATA_FN_NODE:
- IsFunctionLocal = true;
- // fall-through
- case bitc::METADATA_NODE: {
- if (Record.size() % 2 == 1)
- return Error(InvalidRecord);
- unsigned Size = Record.size();
- SmallVector<Value*, 8> Elts;
- for (unsigned i = 0; i != Size; i += 2) {
- Type *Ty = getTypeByID(Record[i]);
- if (!Ty)
- return Error(InvalidRecord);
- 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, IsFunctionLocal);
- IsFunctionLocal = false;
- MDValueList.AssignValue(V, NextMDValueNo++);
- break;
- }
- case bitc::METADATA_STRING: {
- SmallString<8> String(Record.begin(), Record.end());
- Value *V = MDString::get(Context, String);
- MDValueList.AssignValue(V, NextMDValueNo++);
- break;
- }
- case bitc::METADATA_KIND: {
- if (Record.size() < 2)
- return Error(InvalidRecord);
- unsigned Kind = Record[0];
- SmallString<8> Name(Record.begin()+1, Record.end());
- unsigned NewKind = TheModule->getMDKindID(Name.str());
- if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
- return Error(ConflictingMETADATA_KINDRecords);
- break;
- }
- }
- }
- }
- /// decodeSignRotatedValue - Decode a signed value stored with the sign bit in
- /// the LSB for dense VBR encoding.
- uint64_t BitcodeReader::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.
- error_code BitcodeReader::ResolveGlobalAndAliasInits() {
- std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
- std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
- std::vector<std::pair<Function*, unsigned> > FunctionPrefixWorklist;
- GlobalInitWorklist.swap(GlobalInits);
- AliasInitWorklist.swap(AliasInits);
- FunctionPrefixWorklist.swap(FunctionPrefixes);
- 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(ExpectedConstant);
- }
- 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(ExpectedConstant);
- }
- AliasInitWorklist.pop_back();
- }
- while (!FunctionPrefixWorklist.empty()) {
- unsigned ValID = FunctionPrefixWorklist.back().second;
- if (ValID >= ValueList.size()) {
- FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
- } else {
- if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
- FunctionPrefixWorklist.back().first->setPrefixData(C);
- else
- return Error(ExpectedConstant);
- }
- FunctionPrefixWorklist.pop_back();
- }
- return error_code::success();
- }
- static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
- SmallVector<uint64_t, 8> Words(Vals.size());
- std::transform(Vals.begin(), Vals.end(), Words.begin(),
- BitcodeReader::decodeSignRotatedValue);
- return APInt(TypeBits, Words);
- }
- error_code BitcodeReader::ParseConstants() {
- if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
- return Error(InvalidRecord);
- SmallVector<uint64_t, 64> Record;
- // Read all the records for this value table.
- Type *CurTy = Type::getInt32Ty(Context);
- unsigned NextCstNo = ValueList.size();
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- if (NextCstNo != ValueList.size())
- return Error(InvalidConstantReference);
- // Once all the constants have been read, go through and resolve forward
- // references.
- ValueList.ResolveConstantForwardRefs();
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- Record.clear();
- Value *V = 0;
- unsigned BitCode = Stream.readRecord(Entry.ID, 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(InvalidRecord);
- if (Record[0] >= TypeList.size())
- return Error(InvalidRecord);
- 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(InvalidRecord);
- 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(InvalidRecord);
- APInt VInt = ReadWideAPInt(Record,
- cast<IntegerType>(CurTy)->getBitWidth());
- V = ConstantInt::get(Context, VInt);
- break;
- }
- case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
- if (Record.empty())
- return Error(InvalidRecord);
- if (CurTy->isHalfTy())
- V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf,
- APInt(16, (uint16_t)Record[0])));
- else if (CurTy->isFloatTy())
- V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle,
- APInt(32, (uint32_t)Record[0])));
- else if (CurTy->isDoubleTy())
- V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble,
- 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(APFloat::x87DoubleExtended,
- APInt(80, Rearrange)));
- } else if (CurTy->isFP128Ty())
- V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad,
- APInt(128, Record)));
- else if (CurTy->isPPC_FP128Ty())
- V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble,
- APInt(128, Record)));
- else
- V = UndefValue::get(CurTy);
- break;
- }
- case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
- if (Record.empty())
- return Error(InvalidRecord);
- unsigned Size = Record.size();
- SmallVector<Constant*, 16> Elts;
- if (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 (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
- 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 (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
- 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]
- case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
- if (Record.empty())
- return Error(InvalidRecord);
- SmallString<16> Elts(Record.begin(), Record.end());
- V = ConstantDataArray::getString(Context, Elts,
- BitCode == bitc::CST_CODE_CSTRING);
- break;
- }
- case bitc::CST_CODE_DATA: {// DATA: [n x value]
- if (Record.empty())
- return Error(InvalidRecord);
- Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
- unsigned Size = Record.size();
- if (EltTy->isIntegerTy(8)) {
- SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
- if (isa<VectorType>(CurTy))
- V = ConstantDataVector::get(Context, Elts);
- else
- V = ConstantDataArray::get(Context, Elts);
- } else if (EltTy->isIntegerTy(16)) {
- SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
- if (isa<VectorType>(CurTy))
- V = ConstantDataVector::get(Context, Elts);
- else
- V = ConstantDataArray::get(Context, Elts);
- } else if (EltTy->isIntegerTy(32)) {
- SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
- if (isa<VectorType>(CurTy))
- V = ConstantDataVector::get(Context, Elts);
- else
- V = ConstantDataArray::get(Context, Elts);
- } else if (EltTy->isIntegerTy(64)) {
- SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
- if (isa<VectorType>(CurTy))
- V = ConstantDataVector::get(Context, Elts);
- else
- V = ConstantDataArray::get(Context, Elts);
- } else if (EltTy->isFloatTy()) {
- SmallVector<float, 16> Elts(Size);
- std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
- if (isa<VectorType>(CurTy))
- V = ConstantDataVector::get(Context, Elts);
- else
- V = ConstantDataArray::get(Context, Elts);
- } else if (EltTy->isDoubleTy()) {
- SmallVector<double, 16> Elts(Size);
- std::transform(Record.begin(), Record.end(), Elts.begin(),
- BitsToDouble);
- if (isa<VectorType>(CurTy))
- V = ConstantDataVector::get(Context, Elts);
- else
- V = ConstantDataArray::get(Context, Elts);
- } else {
- return Error(InvalidTypeForValue);
- }
- break;
- }
- case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
- if (Record.size() < 3)
- return Error(InvalidRecord);
- 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 ||
- Opc == Instruction::Shl) {
- 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 ||
- Opc == Instruction::UDiv ||
- Opc == Instruction::LShr ||
- Opc == Instruction::AShr) {
- if (Record[3] & (1 << bitc::PEO_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(InvalidRecord);
- int Opc = GetDecodedCastOpcode(Record[0]);
- if (Opc < 0) {
- V = UndefValue::get(CurTy); // Unknown cast.
- } else {
- Type *OpTy = getTypeByID(Record[1]);
- if (!OpTy)
- return Error(InvalidRecord);
- Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
- V = UpgradeBitCastExpr(Opc, Op, CurTy);
- if (!V) 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(InvalidRecord);
- SmallVector<Constant*, 16> Elts;
- for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
- Type *ElTy = getTypeByID(Record[i]);
- if (!ElTy)
- return Error(InvalidRecord);
- Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
- }
- ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
- V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
- BitCode ==
- bitc::CST_CODE_CE_INBOUNDS_GEP);
- break;
- }
- case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
- if (Record.size() < 3)
- return Error(InvalidRecord);
- Type *SelectorTy = Type::getInt1Ty(Context);
- // If CurTy is a vector of length n, then Record[0] must be a <n x i1>
- // vector. Otherwise, it must be a single bit.
- if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
- SelectorTy = VectorType::get(Type::getInt1Ty(Context),
- VTy->getNumElements());
- V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
- SelectorTy),
- 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(InvalidRecord);
- VectorType *OpTy =
- dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
- if (OpTy == 0)
- return Error(InvalidRecord);
- 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]
- VectorType *OpTy = dyn_cast<VectorType>(CurTy);
- if (Record.size() < 3 || OpTy == 0)
- return Error(InvalidRecord);
- 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]
- VectorType *OpTy = dyn_cast<VectorType>(CurTy);
- if (Record.size() < 3 || OpTy == 0)
- return Error(InvalidRecord);
- Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
- Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
- 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]
- VectorType *RTy = dyn_cast<VectorType>(CurTy);
- VectorType *OpTy =
- dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
- if (Record.size() < 4 || RTy == 0 || OpTy == 0)
- return Error(InvalidRecord);
- Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
- Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
- 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(InvalidRecord);
- Type *OpTy = getTypeByID(Record[0]);
- if (OpTy == 0)
- return Error(InvalidRecord);
- 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;
- }
- // This maintains backward compatibility, pre-asm dialect keywords.
- // FIXME: Remove with the 4.0 release.
- case bitc::CST_CODE_INLINEASM_OLD: {
- if (Record.size() < 2)
- return Error(InvalidRecord);
- 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(InvalidRecord);
- unsigned ConstStrSize = Record[2+AsmStrSize];
- if (3+AsmStrSize+ConstStrSize > Record.size())
- return Error(InvalidRecord);
- 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];
- PointerType *PTy = cast<PointerType>(CurTy);
- V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
- AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
- break;
- }
- // This version adds support for the asm dialect keywords (e.g.,
- // inteldialect).
- case bitc::CST_CODE_INLINEASM: {
- if (Record.size() < 2)
- return Error(InvalidRecord);
- std::string AsmStr, ConstrStr;
- bool HasSideEffects = Record[0] & 1;
- bool IsAlignStack = (Record[0] >> 1) & 1;
- unsigned AsmDialect = Record[0] >> 2;
- unsigned AsmStrSize = Record[1];
- if (2+AsmStrSize >= Record.size())
- return Error(InvalidRecord);
- unsigned ConstStrSize = Record[2+AsmStrSize];
- if (3+AsmStrSize+ConstStrSize > Record.size())
- return Error(InvalidRecord);
- 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];
- PointerType *PTy = cast<PointerType>(CurTy);
- V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
- AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
- InlineAsm::AsmDialect(AsmDialect));
- break;
- }
- case bitc::CST_CODE_BLOCKADDRESS:{
- if (Record.size() < 3)
- return Error(InvalidRecord);
- Type *FnTy = getTypeByID(Record[0]);
- if (FnTy == 0)
- return Error(InvalidRecord);
- Function *Fn =
- dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
- if (Fn == 0)
- return Error(InvalidRecord);
- // If the function is already parsed we can insert the block address right
- // away.
- if (!Fn->empty()) {
- Function::iterator BBI = Fn->begin(), BBE = Fn->end();
- for (size_t I = 0, E = Record[2]; I != E; ++I) {
- if (BBI == BBE)
- return Error(InvalidID);
- ++BBI;
- }
- V = BlockAddress::get(Fn, BBI);
- } else {
- // Otherwise insert a placeholder and remember it so it can be inserted
- // when the function is parsed.
- 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;
- }
- }
- error_code BitcodeReader::ParseUseLists() {
- if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
- return Error(InvalidRecord);
- SmallVector<uint64_t, 64> Record;
- // Read all the records.
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a use list record.
- Record.clear();
- switch (Stream.readRecord(Entry.ID, Record)) {
- default: // Default behavior: unknown type.
- break;
- case bitc::USELIST_CODE_ENTRY: { // USELIST_CODE_ENTRY: TBD.
- unsigned RecordLength = Record.size();
- if (RecordLength < 1)
- return Error(InvalidRecord);
- UseListRecords.push_back(Record);
- break;
- }
- }
- }
- }
- /// 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.
- error_code BitcodeReader::RememberAndSkipFunctionBody() {
- // Get the function we are talking about.
- if (FunctionsWithBodies.empty())
- return Error(InsufficientFunctionProtos);
- 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(InvalidRecord);
- return error_code::success();
- }
- error_code BitcodeReader::GlobalCleanup() {
- // Patch the initializers for globals and aliases up.
- ResolveGlobalAndAliasInits();
- if (!GlobalInits.empty() || !AliasInits.empty())
- return Error(MalformedGlobalInitializerSet);
- // 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);
- return error_code::success();
- }
- error_code BitcodeReader::ParseModule(bool Resume) {
- if (Resume)
- Stream.JumpToBit(NextUnreadBit);
- else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
- return Error(InvalidRecord);
- SmallVector<uint64_t, 64> Record;
- std::vector<std::string> SectionTable;
- std::vector<std::string> GCTable;
- // Read all the records for this module.
- while (1) {
- BitstreamEntry Entry = Stream.advance();
- switch (Entry.Kind) {
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return GlobalCleanup();
- case BitstreamEntry::SubBlock:
- switch (Entry.ID) {
- default: // Skip unknown content.
- if (Stream.SkipBlock())
- return Error(InvalidRecord);
- break;
- case bitc::BLOCKINFO_BLOCK_ID:
- if (Stream.ReadBlockInfoBlock())
- return Error(MalformedBlock);
- break;
- case bitc::PARAMATTR_BLOCK_ID:
- if (error_code EC = ParseAttributeBlock())
- return EC;
- break;
- case bitc::PARAMATTR_GROUP_BLOCK_ID:
- if (error_code EC = ParseAttributeGroupBlock())
- return EC;
- break;
- case bitc::TYPE_BLOCK_ID_NEW:
- if (error_code EC = ParseTypeTable())
- return EC;
- break;
- case bitc::VALUE_SYMTAB_BLOCK_ID:
- if (error_code EC = ParseValueSymbolTable())
- return EC;
- SeenValueSymbolTable = true;
- break;
- case bitc::CONSTANTS_BLOCK_ID:
- if (error_code EC = ParseConstants())
- return EC;
- if (error_code EC = ResolveGlobalAndAliasInits())
- return EC;
- break;
- case bitc::METADATA_BLOCK_ID:
- if (error_code EC = ParseMetadata())
- return EC;
- break;
- case bitc::FUNCTION_BLOCK_ID:
- // If this is the first function body we've seen, reverse the
- // FunctionsWithBodies list.
- if (!SeenFirstFunctionBody) {
- std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
- if (error_code EC = GlobalCleanup())
- return EC;
- SeenFirstFunctionBody = true;
- }
- if (error_code EC = RememberAndSkipFunctionBody())
- return EC;
- // For streaming bitcode, suspend parsing when we reach the function
- // bodies. Subsequent materialization calls will resume it when
- // necessary. For streaming, the function bodies must be at the end of
- // the bitcode. If the bitcode file is old, the symbol table will be
- // at the end instead and will not have been seen yet. In this case,
- // just finish the parse now.
- if (LazyStreamer && SeenValueSymbolTable) {
- NextUnreadBit = Stream.GetCurrentBitNo();
- return error_code::success();
- }
- break;
- case bitc::USELIST_BLOCK_ID:
- if (error_code EC = ParseUseLists())
- return EC;
- break;
- }
- continue;
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- switch (Stream.readRecord(Entry.ID, Record)) {
- default: break; // Default behavior, ignore unknown content.
- case bitc::MODULE_CODE_VERSION: { // VERSION: [version#]
- if (Record.size() < 1)
- return Error(InvalidRecord);
- // Only version #0 and #1 are supported so far.
- unsigned module_version = Record[0];
- switch (module_version) {
- default:
- return Error(InvalidValue);
- case 0:
- UseRelativeIDs = false;
- break;
- case 1:
- UseRelativeIDs = true;
- break;
- }
- break;
- }
- case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error(InvalidRecord);
- TheModule->setTargetTriple(S);
- break;
- }
- case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error(InvalidRecord);
- TheModule->setDataLayout(S);
- break;
- }
- case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error(InvalidRecord);
- TheModule->setModuleInlineAsm(S);
- break;
- }
- case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
- // FIXME: Remove in 4.0.
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error(InvalidRecord);
- // Ignore value.
- break;
- }
- case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error(InvalidRecord);
- SectionTable.push_back(S);
- break;
- }
- case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error(InvalidRecord);
- GCTable.push_back(S);
- break;
- }
- // GLOBALVAR: [pointer type, isconst, initid,
- // linkage, alignment, section, visibility, threadlocal,
- // unnamed_addr]
- case bitc::MODULE_CODE_GLOBALVAR: {
- if (Record.size() < 6)
- return Error(InvalidRecord);
- Type *Ty = getTypeByID(Record[0]);
- if (!Ty)
- return Error(InvalidRecord);
- if (!Ty->isPointerTy())
- return Error(InvalidTypeForValue);
- 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(InvalidID);
- Section = SectionTable[Record[5]-1];
- }
- GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
- if (Record.size() > 6)
- Visibility = GetDecodedVisibility(Record[6]);
- GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
- if (Record.size() > 7)
- TLM = GetDecodedThreadLocalMode(Record[7]);
- bool UnnamedAddr = false;
- if (Record.size() > 8)
- UnnamedAddr = Record[8];
- bool ExternallyInitialized = false;
- if (Record.size() > 9)
- ExternallyInitialized = Record[9];
- GlobalVariable *NewGV =
- new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
- TLM, AddressSpace, ExternallyInitialized);
- NewGV->setAlignment(Alignment);
- if (!Section.empty())
- NewGV->setSection(Section);
- NewGV->setVisibility(Visibility);
- NewGV->setUnnamedAddr(UnnamedAddr);
- 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, unnamed_addr]
- case bitc::MODULE_CODE_FUNCTION: {
- if (Record.size() < 8)
- return Error(InvalidRecord);
- Type *Ty = getTypeByID(Record[0]);
- if (!Ty)
- return Error(InvalidRecord);
- if (!Ty->isPointerTy())
- return Error(InvalidTypeForValue);
- FunctionType *FTy =
- dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
- if (!FTy)
- return Error(InvalidTypeForValue);
- 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(InvalidID);
- 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(InvalidID);
- Func->setGC(GCTable[Record[8]-1].c_str());
- }
- bool UnnamedAddr = false;
- if (Record.size() > 9)
- UnnamedAddr = Record[9];
- Func->setUnnamedAddr(UnnamedAddr);
- if (Record.size() > 10 && Record[10] != 0)
- FunctionPrefixes.push_back(std::make_pair(Func, Record[10]-1));
- 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);
- if (LazyStreamer) DeferredFunctionInfo[Func] = 0;
- }
- 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(InvalidRecord);
- Type *Ty = getTypeByID(Record[0]);
- if (!Ty)
- return Error(InvalidRecord);
- if (!Ty->isPointerTy())
- return Error(InvalidTypeForValue);
- 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(InvalidRecord);
- ValueList.shrinkTo(Record[0]);
- break;
- }
- Record.clear();
- }
- }
- error_code BitcodeReader::ParseBitcodeInto(Module *M) {
- TheModule = 0;
- if (error_code EC = InitStream())
- return EC;
- // 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(InvalidBitcodeSignature);
- // We expect a number of well-defined blocks, though we don't necessarily
- // need to understand them all.
- while (1) {
- if (Stream.AtEndOfStream())
- return error_code::success();
- BitstreamEntry Entry =
- Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
- switch (Entry.Kind) {
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::SubBlock:
- switch (Entry.ID) {
- case bitc::BLOCKINFO_BLOCK_ID:
- if (Stream.ReadBlockInfoBlock())
- return Error(MalformedBlock);
- break;
- case bitc::MODULE_BLOCK_ID:
- // Reject multiple MODULE_BLOCK's in a single bitstream.
- if (TheModule)
- return Error(InvalidMultipleBlocks);
- TheModule = M;
- if (error_code EC = ParseModule(false))
- return EC;
- if (LazyStreamer)
- return error_code::success();
- break;
- default:
- if (Stream.SkipBlock())
- return Error(InvalidRecord);
- break;
- }
- continue;
- case BitstreamEntry::Record:
- // There should be no records in the top-level of blocks.
- // The ranlib in Xcode 4 will align archive members by appending newlines
- // to the end of them. If this file size is a multiple of 4 but not 8, we
- // have to read and ignore these final 4 bytes :-(
- if (Stream.getAbbrevIDWidth() == 2 && Entry.ID == 2 &&
- Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
- Stream.AtEndOfStream())
- return error_code::success();
- return Error(InvalidRecord);
- }
- }
- }
- error_code BitcodeReader::ParseModuleTriple(std::string &Triple) {
- if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
- return Error(InvalidRecord);
- SmallVector<uint64_t, 64> Record;
- // Read all the records for this module.
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- switch (Stream.readRecord(Entry.ID, Record)) {
- default: break; // Default behavior, ignore unknown content.
- case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
- std::string S;
- if (ConvertToString(Record, 0, S))
- return Error(InvalidRecord);
- Triple = S;
- break;
- }
- }
- Record.clear();
- }
- }
- error_code BitcodeReader::ParseTriple(std::string &Triple) {
- if (error_code EC = InitStream())
- return EC;
- // 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(InvalidBitcodeSignature);
- // We expect a number of well-defined blocks, though we don't necessarily
- // need to understand them all.
- while (1) {
- BitstreamEntry Entry = Stream.advance();
- switch (Entry.Kind) {
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::SubBlock:
- if (Entry.ID == bitc::MODULE_BLOCK_ID)
- return ParseModuleTriple(Triple);
- // Ignore other sub-blocks.
- if (Stream.SkipBlock())
- return Error(MalformedBlock);
- continue;
- case BitstreamEntry::Record:
- Stream.skipRecord(Entry.ID);
- continue;
- }
- }
- }
- /// ParseMetadataAttachment - Parse metadata attachments.
- error_code BitcodeReader::ParseMetadataAttachment() {
- if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
- return Error(InvalidRecord);
- SmallVector<uint64_t, 64> Record;
- while (1) {
- BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
- switch (Entry.Kind) {
- case BitstreamEntry::SubBlock: // Handled for us already.
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- return error_code::success();
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a metadata attachment record.
- Record.clear();
- switch (Stream.readRecord(Entry.ID, Record)) {
- default: // Default behavior: ignore.
- break;
- case bitc::METADATA_ATTACHMENT: {
- unsigned RecordLength = Record.size();
- if (Record.empty() || (RecordLength - 1) % 2 == 1)
- return Error(InvalidRecord);
- 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(InvalidID);
- Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
- Inst->setMetadata(I->second, cast<MDNode>(Node));
- if (I->second == LLVMContext::MD_tbaa)
- InstsWithTBAATag.push_back(Inst);
- }
- break;
- }
- }
- }
- }
- /// ParseFunctionBody - Lazily parse the specified function body block.
- error_code BitcodeReader::ParseFunctionBody(Function *F) {
- if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
- return Error(InvalidRecord);
- 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) {
- BitstreamEntry Entry = Stream.advance();
- switch (Entry.Kind) {
- case BitstreamEntry::Error:
- return Error(MalformedBlock);
- case BitstreamEntry::EndBlock:
- goto OutOfRecordLoop;
- case BitstreamEntry::SubBlock:
- switch (Entry.ID) {
- default: // Skip unknown content.
- if (Stream.SkipBlock())
- return Error(InvalidRecord);
- break;
- case bitc::CONSTANTS_BLOCK_ID:
- if (error_code EC = ParseConstants())
- return EC;
- NextValueNo = ValueList.size();
- break;
- case bitc::VALUE_SYMTAB_BLOCK_ID:
- if (error_code EC = ParseValueSymbolTable())
- return EC;
- break;
- case bitc::METADATA_ATTACHMENT_ID:
- if (error_code EC = ParseMetadataAttachment())
- return EC;
- break;
- case bitc::METADATA_BLOCK_ID:
- if (error_code EC = ParseMetadata())
- return EC;
- break;
- }
- continue;
- case BitstreamEntry::Record:
- // The interesting case.
- break;
- }
- // Read a record.
- Record.clear();
- Instruction *I = 0;
- unsigned BitCode = Stream.readRecord(Entry.ID, Record);
- switch (BitCode) {
- default: // Default behavior: reject
- return Error(InvalidValue);
- case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
- if (Record.size() < 1 || Record[0] == 0)
- return Error(InvalidRecord);
- // 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(InvalidRecord);
- I->setDebugLoc(LastLoc);
- I = 0;
- continue;
- case bitc::FUNC_CODE_DEBUG_LOC: { // 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(InvalidRecord);
- 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) ||
- popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
- OpNum+1 > Record.size())
- return Error(InvalidRecord);
- int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
- if (Opc == -1)
- return Error(InvalidRecord);
- 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 ||
- Opc == Instruction::Shl) {
- 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 ||
- Opc == Instruction::UDiv ||
- Opc == Instruction::LShr ||
- Opc == Instruction::AShr) {
- if (Record[OpNum] & (1 << bitc::PEO_EXACT))
- cast<BinaryOperator>(I)->setIsExact(true);
- } else if (isa<FPMathOperator>(I)) {
- FastMathFlags FMF;
- if (0 != (Record[OpNum] & FastMathFlags::UnsafeAlgebra))
- FMF.setUnsafeAlgebra();
- if (0 != (Record[OpNum] & FastMathFlags::NoNaNs))
- FMF.setNoNaNs();
- if (0 != (Record[OpNum] & FastMathFlags::NoInfs))
- FMF.setNoInfs();
- if (0 != (Record[OpNum] & FastMathFlags::NoSignedZeros))
- FMF.setNoSignedZeros();
- if (0 != (Record[OpNum] & FastMathFlags::AllowReciprocal))
- FMF.setAllowReciprocal();
- if (FMF.any())
- I->setFastMathFlags(FMF);
- }
- }
- 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(InvalidRecord);
- Type *ResTy = getTypeByID(Record[OpNum]);
- int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
- if (Opc == -1 || ResTy == 0)
- return Error(InvalidRecord);
- Instruction *Temp = 0;
- if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
- if (Temp) {
- InstructionList.push_back(Temp);
- CurBB->getInstList().push_back(Temp);
- }
- } else {
- 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(InvalidRecord);
- SmallVector<Value*, 16> GEPIdx;
- while (OpNum != Record.size()) {
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error(InvalidRecord);
- GEPIdx.push_back(Op);
- }
- I = GetElementPtrInst::Create(BasePtr, GEPIdx);
- 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(InvalidRecord);
- SmallVector<unsigned, 4> EXTRACTVALIdx;
- for (unsigned RecSize = Record.size();
- OpNum != RecSize; ++OpNum) {
- uint64_t Index = Record[OpNum];
- if ((unsigned)Index != Index)
- return Error(InvalidValue);
- EXTRACTVALIdx.push_back((unsigned)Index);
- }
- I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
- 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(InvalidRecord);
- Value *Val;
- if (getValueTypePair(Record, OpNum, NextValueNo, Val))
- return Error(InvalidRecord);
- SmallVector<unsigned, 4> INSERTVALIdx;
- for (unsigned RecSize = Record.size();
- OpNum != RecSize; ++OpNum) {
- uint64_t Index = Record[OpNum];
- if ((unsigned)Index != Index)
- return Error(InvalidValue);
- INSERTVALIdx.push_back((unsigned)Index);
- }
- I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
- 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) ||
- popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
- popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
- return Error(InvalidRecord);
- 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) ||
- popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
- getValueTypePair(Record, OpNum, NextValueNo, Cond))
- return Error(InvalidRecord);
- // select condition can be either i1 or [N x i1]
- if (VectorType* vector_type =
- dyn_cast<VectorType>(Cond->getType())) {
- // expect <n x i1>
- if (vector_type->getElementType() != Type::getInt1Ty(Context))
- return Error(InvalidTypeForValue);
- } else {
- // expect i1
- if (Cond->getType() != Type::getInt1Ty(Context))
- return Error(InvalidTypeForValue);
- }
- 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) ||
- popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
- return Error(InvalidRecord);
- 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) ||
- popValue(Record, OpNum, NextValueNo,
- cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
- popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
- return Error(InvalidRecord);
- 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) ||
- popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
- return Error(InvalidRecord);
- if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
- return Error(InvalidRecord);
- 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) ||
- popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
- OpNum+1 != Record.size())
- return Error(InvalidRecord);
- 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_RET: // RET: [opty,opval<optional>]
- {
- unsigned Size = Record.size();
- if (Size == 0) {
- I = ReturnInst::Create(Context);
- InstructionList.push_back(I);
- break;
- }
- unsigned OpNum = 0;
- Value *Op = NULL;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error(InvalidRecord);
- if (OpNum != Record.size())
- return Error(InvalidRecord);
- I = ReturnInst::Create(Context, Op);
- 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(InvalidRecord);
- BasicBlock *TrueDest = getBasicBlock(Record[0]);
- if (TrueDest == 0)
- return Error(InvalidRecord);
- if (Record.size() == 1) {
- I = BranchInst::Create(TrueDest);
- InstructionList.push_back(I);
- }
- else {
- BasicBlock *FalseDest = getBasicBlock(Record[1]);
- Value *Cond = getValue(Record, 2, NextValueNo,
- Type::getInt1Ty(Context));
- if (FalseDest == 0 || Cond == 0)
- return Error(InvalidRecord);
- I = BranchInst::Create(TrueDest, FalseDest, Cond);
- InstructionList.push_back(I);
- }
- break;
- }
- case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
- // Check magic
- if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
- // "New" SwitchInst format with case ranges. The changes to write this
- // format were reverted but we still recognize bitcode that uses it.
- // Hopefully someday we will have support for case ranges and can use
- // this format again.
- Type *OpTy = getTypeByID(Record[1]);
- unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
- Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
- BasicBlock *Default = getBasicBlock(Record[3]);
- if (OpTy == 0 || Cond == 0 || Default == 0)
- return Error(InvalidRecord);
- unsigned NumCases = Record[4];
- SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
- InstructionList.push_back(SI);
- unsigned CurIdx = 5;
- for (unsigned i = 0; i != NumCases; ++i) {
- SmallVector<ConstantInt*, 1> CaseVals;
- unsigned NumItems = Record[CurIdx++];
- for (unsigned ci = 0; ci != NumItems; ++ci) {
- bool isSingleNumber = Record[CurIdx++];
- APInt Low;
- unsigned ActiveWords = 1;
- if (ValueBitWidth > 64)
- ActiveWords = Record[CurIdx++];
- Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
- ValueBitWidth);
- CurIdx += ActiveWords;
- if (!isSingleNumber) {
- ActiveWords = 1;
- if (ValueBitWidth > 64)
- ActiveWords = Record[CurIdx++];
- APInt High =
- ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
- ValueBitWidth);
- CurIdx += ActiveWords;
- // FIXME: It is not clear whether values in the range should be
- // compared as signed or unsigned values. The partially
- // implemented changes that used this format in the past used
- // unsigned comparisons.
- for ( ; Low.ule(High); ++Low)
- CaseVals.push_back(ConstantInt::get(Context, Low));
- } else
- CaseVals.push_back(ConstantInt::get(Context, Low));
- }
- BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
- for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
- cve = CaseVals.end(); cvi != cve; ++cvi)
- SI->addCase(*cvi, DestBB);
- }
- I = SI;
- break;
- }
- // Old SwitchInst format without case ranges.
- if (Record.size() < 3 || (Record.size() & 1) == 0)
- return Error(InvalidRecord);
- Type *OpTy = getTypeByID(Record[0]);
- Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
- BasicBlock *Default = getBasicBlock(Record[2]);
- if (OpTy == 0 || Cond == 0 || Default == 0)
- return Error(InvalidRecord);
- 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(InvalidRecord);
- }
- SI->addCase(CaseVal, DestBB);
- }
- I = SI;
- break;
- }
- case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
- if (Record.size() < 2)
- return Error(InvalidRecord);
- Type *OpTy = getTypeByID(Record[0]);
- Value *Address = getValue(Record, 1, NextValueNo, OpTy);
- if (OpTy == 0 || Address == 0)
- return Error(InvalidRecord);
- 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(InvalidRecord);
- }
- }
- I = IBI;
- break;
- }
- case bitc::FUNC_CODE_INST_INVOKE: {
- // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
- if (Record.size() < 4)
- return Error(InvalidRecord);
- AttributeSet 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(InvalidRecord);
- PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
- 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(InvalidRecord);
- SmallVector<Value*, 16> Ops;
- for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
- Ops.push_back(getValue(Record, OpNum, NextValueNo,
- FTy->getParamType(i)));
- if (Ops.back() == 0)
- return Error(InvalidRecord);
- }
- if (!FTy->isVarArg()) {
- if (Record.size() != OpNum)
- return Error(InvalidRecord);
- } else {
- // Read type/value pairs for varargs params.
- while (OpNum != Record.size()) {
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error(InvalidRecord);
- Ops.push_back(Op);
- }
- }
- I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
- InstructionList.push_back(I);
- cast<InvokeInst>(I)->setCallingConv(
- static_cast<CallingConv::ID>(CCInfo));
- cast<InvokeInst>(I)->setAttributes(PAL);
- break;
- }
- case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
- unsigned Idx = 0;
- Value *Val = 0;
- if (getValueTypePair(Record, Idx, NextValueNo, Val))
- return Error(InvalidRecord);
- I = ResumeInst::Create(Val);
- 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(InvalidRecord);
- Type *Ty = getTypeByID(Record[0]);
- if (!Ty)
- return Error(InvalidRecord);
- PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
- InstructionList.push_back(PN);
- for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
- Value *V;
- // With the new function encoding, it is possible that operands have
- // negative IDs (for forward references). Use a signed VBR
- // representation to keep the encoding small.
- if (UseRelativeIDs)
- V = getValueSigned(Record, 1+i, NextValueNo, Ty);
- else
- V = getValue(Record, 1+i, NextValueNo, Ty);
- BasicBlock *BB = getBasicBlock(Record[2+i]);
- if (!V || !BB)
- return Error(InvalidRecord);
- PN->addIncoming(V, BB);
- }
- I = PN;
- break;
- }
- case bitc::FUNC_CODE_INST_LANDINGPAD: {
- // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
- unsigned Idx = 0;
- if (Record.size() < 4)
- return Error(InvalidRecord);
- Type *Ty = getTypeByID(Record[Idx++]);
- if (!Ty)
- return Error(InvalidRecord);
- Value *PersFn = 0;
- if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
- return Error(InvalidRecord);
- bool IsCleanup = !!Record[Idx++];
- unsigned NumClauses = Record[Idx++];
- LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
- LP->setCleanup(IsCleanup);
- for (unsigned J = 0; J != NumClauses; ++J) {
- LandingPadInst::ClauseType CT =
- LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
- Value *Val;
- if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
- delete LP;
- return Error(InvalidRecord);
- }
- assert((CT != LandingPadInst::Catch ||
- !isa<ArrayType>(Val->getType())) &&
- "Catch clause has a invalid type!");
- assert((CT != LandingPadInst::Filter ||
- isa<ArrayType>(Val->getType())) &&
- "Filter clause has invalid type!");
- LP->addClause(Val);
- }
- I = LP;
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
- if (Record.size() != 4)
- return Error(InvalidRecord);
- PointerType *Ty =
- dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
- Type *OpTy = getTypeByID(Record[1]);
- Value *Size = getFnValueByID(Record[2], OpTy);
- unsigned Align = Record[3];
- if (!Ty || !Size)
- return Error(InvalidRecord);
- 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(InvalidRecord);
- I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_LOADATOMIC: {
- // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
- unsigned OpNum = 0;
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
- OpNum+4 != Record.size())
- return Error(InvalidRecord);
- AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
- if (Ordering == NotAtomic || Ordering == Release ||
- Ordering == AcquireRelease)
- return Error(InvalidRecord);
- if (Ordering != NotAtomic && Record[OpNum] == 0)
- return Error(InvalidRecord);
- SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
- I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1,
- Ordering, SynchScope);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
- unsigned OpNum = 0;
- Value *Val, *Ptr;
- if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
- popValue(Record, OpNum, NextValueNo,
- cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
- OpNum+2 != Record.size())
- return Error(InvalidRecord);
- I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_STOREATOMIC: {
- // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
- unsigned OpNum = 0;
- Value *Val, *Ptr;
- if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
- popValue(Record, OpNum, NextValueNo,
- cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
- OpNum+4 != Record.size())
- return Error(InvalidRecord);
- AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
- if (Ordering == NotAtomic || Ordering == Acquire ||
- Ordering == AcquireRelease)
- return Error(InvalidRecord);
- SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
- if (Ordering != NotAtomic && Record[OpNum] == 0)
- return Error(InvalidRecord);
- I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1,
- Ordering, SynchScope);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_CMPXCHG: {
- // CMPXCHG:[ptrty, ptr, cmp, new, vol, ordering, synchscope]
- unsigned OpNum = 0;
- Value *Ptr, *Cmp, *New;
- if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
- popValue(Record, OpNum, NextValueNo,
- cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
- popValue(Record, OpNum, NextValueNo,
- cast<PointerType>(Ptr->getType())->getElementType(), New) ||
- OpNum+3 != Record.size())
- return Error(InvalidRecord);
- AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+1]);
- if (Ordering == NotAtomic || Ordering == Unordered)
- return Error(InvalidRecord);
- SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
- I = new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, SynchScope);
- cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_ATOMICRMW: {
- // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
- unsigned OpNum = 0;
- Value *Ptr, *Val;
- if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
- popValue(Record, OpNum, NextValueNo,
- cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
- OpNum+4 != Record.size())
- return Error(InvalidRecord);
- AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
- if (Operation < AtomicRMWInst::FIRST_BINOP ||
- Operation > AtomicRMWInst::LAST_BINOP)
- return Error(InvalidRecord);
- AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
- if (Ordering == NotAtomic || Ordering == Unordered)
- return Error(InvalidRecord);
- SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
- I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
- cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
- if (2 != Record.size())
- return Error(InvalidRecord);
- AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
- if (Ordering == NotAtomic || Ordering == Unordered ||
- Ordering == Monotonic)
- return Error(InvalidRecord);
- SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
- I = new FenceInst(Context, Ordering, SynchScope);
- InstructionList.push_back(I);
- break;
- }
- case bitc::FUNC_CODE_INST_CALL: {
- // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
- if (Record.size() < 3)
- return Error(InvalidRecord);
- AttributeSet PAL = getAttributes(Record[0]);
- unsigned CCInfo = Record[1];
- unsigned OpNum = 2;
- Value *Callee;
- if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
- return Error(InvalidRecord);
- PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
- FunctionType *FTy = 0;
- if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
- if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
- return Error(InvalidRecord);
- SmallVector<Value*, 16> Args;
- // Read the fixed params.
- for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
- if (FTy->getParamType(i)->isLabelTy())
- Args.push_back(getBasicBlock(Record[OpNum]));
- else
- Args.push_back(getValue(Record, OpNum, NextValueNo,
- FTy->getParamType(i)));
- if (Args.back() == 0)
- return Error(InvalidRecord);
- }
- // Read type/value pairs for varargs params.
- if (!FTy->isVarArg()) {
- if (OpNum != Record.size())
- return Error(InvalidRecord);
- } else {
- while (OpNum != Record.size()) {
- Value *Op;
- if (getValueTypePair(Record, OpNum, NextValueNo, Op))
- return Error(InvalidRecord);
- Args.push_back(Op);
- }
- }
- I = CallInst::Create(Callee, Args);
- 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(InvalidRecord);
- Type *OpTy = getTypeByID(Record[0]);
- Value *Op = getValue(Record, 1, NextValueNo, OpTy);
- Type *ResTy = getTypeByID(Record[2]);
- if (!OpTy || !Op || !ResTy)
- return Error(InvalidRecord);
- 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(InvalidInstructionWithNoBB);
- }
- 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++);
- }
- OutOfRecordLoop:
- // 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(NeverResolvedValueFoundInFunction);
- }
- }
- // 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(InvalidID);
- 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 error_code::success();
- }
- /// Find the function body in the bitcode stream
- error_code BitcodeReader::FindFunctionInStream(Function *F,
- DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator) {
- while (DeferredFunctionInfoIterator->second == 0) {
- if (Stream.AtEndOfStream())
- return Error(CouldNotFindFunctionInStream);
- // ParseModule will parse the next body in the stream and set its
- // position in the DeferredFunctionInfo map.
- if (error_code EC = ParseModule(true))
- return EC;
- }
- return error_code::success();
- }
- //===----------------------------------------------------------------------===//
- // 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;
- }
- error_code BitcodeReader::Materialize(GlobalValue *GV) {
- Function *F = dyn_cast<Function>(GV);
- // If it's not a function or is already material, ignore the request.
- if (!F || !F->isMaterializable())
- return error_code::success();
- DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
- assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
- // If its position is recorded as 0, its body is somewhere in the stream
- // but we haven't seen it yet.
- if (DFII->second == 0 && LazyStreamer)
- if (error_code EC = FindFunctionInStream(F, DFII))
- return EC;
- // Move the bit stream to the saved position of the deferred function body.
- Stream.JumpToBit(DFII->second);
- if (error_code EC = ParseFunctionBody(F))
- return EC;
- // 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 error_code::success();
- }
- 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();
- }
- error_code BitcodeReader::MaterializeModule(Module *M) {
- 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()) {
- if (error_code EC = Materialize(F))
- return EC;
- }
- }
- // At this point, if there are any function bodies, the current bit is
- // pointing to the END_BLOCK record after them. Now make sure the rest
- // of the bits in the module have been read.
- if (NextUnreadBit)
- ParseModule(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);
- for (unsigned I = 0, E = InstsWithTBAATag.size(); I < E; I++)
- UpgradeInstWithTBAATag(InstsWithTBAATag[I]);
- UpgradeDebugInfo(*M);
- return error_code::success();
- }
- error_code BitcodeReader::InitStream() {
- if (LazyStreamer)
- return InitLazyStream();
- return InitStreamFromBuffer();
- }
- error_code BitcodeReader::InitStreamFromBuffer() {
- const unsigned char *BufPtr = (const unsigned char*)Buffer->getBufferStart();
- const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
- if (Buffer->getBufferSize() & 3) {
- if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
- return Error(InvalidBitcodeSignature);
- else
- return Error(BitcodeStreamInvalidSize);
- }
- // 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, true))
- return Error(InvalidBitcodeWrapperHeader);
- StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
- Stream.init(*StreamFile);
- return error_code::success();
- }
- error_code BitcodeReader::InitLazyStream() {
- // Check and strip off the bitcode wrapper; BitstreamReader expects never to
- // see it.
- StreamingMemoryObject *Bytes = new StreamingMemoryObject(LazyStreamer);
- StreamFile.reset(new BitstreamReader(Bytes));
- Stream.init(*StreamFile);
- unsigned char buf[16];
- if (Bytes->readBytes(0, 16, buf) == -1)
- return Error(BitcodeStreamInvalidSize);
- if (!isBitcode(buf, buf + 16))
- return Error(InvalidBitcodeSignature);
- if (isBitcodeWrapper(buf, buf + 4)) {
- const unsigned char *bitcodeStart = buf;
- const unsigned char *bitcodeEnd = buf + 16;
- SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
- Bytes->dropLeadingBytes(bitcodeStart - buf);
- Bytes->setKnownObjectSize(bitcodeEnd - bitcodeStart);
- }
- return error_code::success();
- }
- namespace {
- class BitcodeErrorCategoryType : public _do_message {
- const char *name() const LLVM_OVERRIDE {
- return "llvm.bitcode";
- }
- std::string message(int IE) const LLVM_OVERRIDE {
- BitcodeReader::ErrorType E = static_cast<BitcodeReader::ErrorType>(IE);
- switch (E) {
- case BitcodeReader::BitcodeStreamInvalidSize:
- return "Bitcode stream length should be >= 16 bytes and a multiple of 4";
- case BitcodeReader::ConflictingMETADATA_KINDRecords:
- return "Conflicting METADATA_KIND records";
- case BitcodeReader::CouldNotFindFunctionInStream:
- return "Could not find function in stream";
- case BitcodeReader::ExpectedConstant:
- return "Expected a constant";
- case BitcodeReader::InsufficientFunctionProtos:
- return "Insufficient function protos";
- case BitcodeReader::InvalidBitcodeSignature:
- return "Invalid bitcode signature";
- case BitcodeReader::InvalidBitcodeWrapperHeader:
- return "Invalid bitcode wrapper header";
- case BitcodeReader::InvalidConstantReference:
- return "Invalid ronstant reference";
- case BitcodeReader::InvalidID:
- return "Invalid ID";
- case BitcodeReader::InvalidInstructionWithNoBB:
- return "Invalid instruction with no BB";
- case BitcodeReader::InvalidRecord:
- return "Invalid record";
- case BitcodeReader::InvalidTypeForValue:
- return "Invalid type for value";
- case BitcodeReader::InvalidTYPETable:
- return "Invalid TYPE table";
- case BitcodeReader::InvalidType:
- return "Invalid type";
- case BitcodeReader::MalformedBlock:
- return "Malformed block";
- case BitcodeReader::MalformedGlobalInitializerSet:
- return "Malformed global initializer set";
- case BitcodeReader::InvalidMultipleBlocks:
- return "Invalid multiple blocks";
- case BitcodeReader::NeverResolvedValueFoundInFunction:
- return "Never resolved value found in function";
- case BitcodeReader::InvalidValue:
- return "Invalid value";
- }
- llvm_unreachable("Unknown error type!");
- }
- };
- }
- const error_category &BitcodeReader::BitcodeErrorCategory() {
- static BitcodeErrorCategoryType O;
- return O;
- }
- //===----------------------------------------------------------------------===//
- // 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 (error_code EC = R->ParseBitcodeInto(M)) {
- if (ErrMsg)
- *ErrMsg = EC.message();
- delete M; // Also deletes R.
- return 0;
- }
- // Have the BitcodeReader dtor delete 'Buffer'.
- R->setBufferOwned(true);
- R->materializeForwardReferencedFunctions();
- return M;
- }
- Module *llvm::getStreamedBitcodeModule(const std::string &name,
- DataStreamer *streamer,
- LLVMContext &Context,
- std::string *ErrMsg) {
- Module *M = new Module(name, Context);
- BitcodeReader *R = new BitcodeReader(streamer, Context);
- M->setMaterializer(R);
- if (error_code EC = R->ParseBitcodeInto(M)) {
- if (ErrMsg)
- *ErrMsg = EC.message();
- delete M; // Also deletes R.
- return 0;
- }
- R->setBufferOwned(false); // no buffer to delete
- 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 0;
- }
- // TODO: Restore the use-lists to the in-memory state when the bitcode was
- // written. We must defer until the Module has been fully materialized.
- return M;
- }
- std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
- LLVMContext& Context,
- std::string *ErrMsg) {
- BitcodeReader *R = new BitcodeReader(Buffer, Context);
- // Don't let the BitcodeReader dtor delete 'Buffer'.
- R->setBufferOwned(false);
- std::string Triple("");
- if (error_code EC = R->ParseTriple(Triple))
- if (ErrMsg)
- *ErrMsg = EC.message();
- delete R;
- return Triple;
- }