1 //===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Bitcode/ReaderWriter.h"
11 #include "llvm/ADT/STLExtras.h"
12 #include "llvm/ADT/SmallString.h"
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/ADT/Triple.h"
15 #include "llvm/Bitcode/BitstreamReader.h"
16 #include "llvm/Bitcode/LLVMBitCodes.h"
17 #include "llvm/IR/AutoUpgrade.h"
18 #include "llvm/IR/Constants.h"
19 #include "llvm/IR/DebugInfo.h"
20 #include "llvm/IR/DebugInfoMetadata.h"
21 #include "llvm/IR/DerivedTypes.h"
22 #include "llvm/IR/DiagnosticPrinter.h"
23 #include "llvm/IR/GVMaterializer.h"
24 #include "llvm/IR/InlineAsm.h"
25 #include "llvm/IR/IntrinsicInst.h"
26 #include "llvm/IR/LLVMContext.h"
27 #include "llvm/IR/Module.h"
28 #include "llvm/IR/OperandTraits.h"
29 #include "llvm/IR/Operator.h"
30 #include "llvm/IR/ValueHandle.h"
31 #include "llvm/Support/DataStream.h"
32 #include "llvm/Support/ManagedStatic.h"
33 #include "llvm/Support/MathExtras.h"
34 #include "llvm/Support/MemoryBuffer.h"
35 #include "llvm/Support/raw_ostream.h"
41 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
44 class BitcodeReaderValueList {
45 std::vector<WeakVH> ValuePtrs;
47 /// ResolveConstants - As we resolve forward-referenced constants, we add
48 /// information about them to this vector. This allows us to resolve them in
49 /// bulk instead of resolving each reference at a time. See the code in
50 /// ResolveConstantForwardRefs for more information about this.
52 /// The key of this vector is the placeholder constant, the value is the slot
53 /// number that holds the resolved value.
54 typedef std::vector<std::pair<Constant*, unsigned> > ResolveConstantsTy;
55 ResolveConstantsTy ResolveConstants;
58 BitcodeReaderValueList(LLVMContext &C) : Context(C) {}
59 ~BitcodeReaderValueList() {
60 assert(ResolveConstants.empty() && "Constants not resolved?");
63 // vector compatibility methods
64 unsigned size() const { return ValuePtrs.size(); }
65 void resize(unsigned N) { ValuePtrs.resize(N); }
66 void push_back(Value *V) {
67 ValuePtrs.push_back(V);
71 assert(ResolveConstants.empty() && "Constants not resolved?");
75 Value *operator[](unsigned i) const {
76 assert(i < ValuePtrs.size());
80 Value *back() const { return ValuePtrs.back(); }
81 void pop_back() { ValuePtrs.pop_back(); }
82 bool empty() const { return ValuePtrs.empty(); }
83 void shrinkTo(unsigned N) {
84 assert(N <= size() && "Invalid shrinkTo request!");
88 Constant *getConstantFwdRef(unsigned Idx, Type *Ty);
89 Value *getValueFwdRef(unsigned Idx, Type *Ty);
91 void AssignValue(Value *V, unsigned Idx);
93 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
94 /// resolves any forward references.
95 void ResolveConstantForwardRefs();
98 class BitcodeReaderMDValueList {
103 std::vector<TrackingMDRef> MDValuePtrs;
105 LLVMContext &Context;
107 BitcodeReaderMDValueList(LLVMContext &C)
108 : NumFwdRefs(0), AnyFwdRefs(false), Context(C) {}
110 // vector compatibility methods
111 unsigned size() const { return MDValuePtrs.size(); }
112 void resize(unsigned N) { MDValuePtrs.resize(N); }
113 void push_back(Metadata *MD) { MDValuePtrs.emplace_back(MD); }
114 void clear() { MDValuePtrs.clear(); }
115 Metadata *back() const { return MDValuePtrs.back(); }
116 void pop_back() { MDValuePtrs.pop_back(); }
117 bool empty() const { return MDValuePtrs.empty(); }
119 Metadata *operator[](unsigned i) const {
120 assert(i < MDValuePtrs.size());
121 return MDValuePtrs[i];
124 void shrinkTo(unsigned N) {
125 assert(N <= size() && "Invalid shrinkTo request!");
126 MDValuePtrs.resize(N);
129 Metadata *getValueFwdRef(unsigned Idx);
130 void AssignValue(Metadata *MD, unsigned Idx);
131 void tryToResolveCycles();
134 class BitcodeReader : public GVMaterializer {
135 LLVMContext &Context;
136 DiagnosticHandlerFunction DiagnosticHandler;
138 std::unique_ptr<MemoryBuffer> Buffer;
139 std::unique_ptr<BitstreamReader> StreamFile;
140 BitstreamCursor Stream;
141 DataStreamer *LazyStreamer;
142 uint64_t NextUnreadBit;
143 bool SeenValueSymbolTable;
145 std::vector<Type*> TypeList;
146 BitcodeReaderValueList ValueList;
147 BitcodeReaderMDValueList MDValueList;
148 std::vector<Comdat *> ComdatList;
149 SmallVector<Instruction *, 64> InstructionList;
151 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInits;
152 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInits;
153 std::vector<std::pair<Function*, unsigned> > FunctionPrefixes;
154 std::vector<std::pair<Function*, unsigned> > FunctionPrologues;
156 SmallVector<Instruction*, 64> InstsWithTBAATag;
158 /// MAttributes - The set of attributes by index. Index zero in the
159 /// file is for null, and is thus not represented here. As such all indices
161 std::vector<AttributeSet> MAttributes;
163 /// \brief The set of attribute groups.
164 std::map<unsigned, AttributeSet> MAttributeGroups;
166 /// FunctionBBs - While parsing a function body, this is a list of the basic
167 /// blocks for the function.
168 std::vector<BasicBlock*> FunctionBBs;
170 // When reading the module header, this list is populated with functions that
171 // have bodies later in the file.
172 std::vector<Function*> FunctionsWithBodies;
174 // When intrinsic functions are encountered which require upgrading they are
175 // stored here with their replacement function.
176 typedef std::vector<std::pair<Function*, Function*> > UpgradedIntrinsicMap;
177 UpgradedIntrinsicMap UpgradedIntrinsics;
179 // Map the bitcode's custom MDKind ID to the Module's MDKind ID.
180 DenseMap<unsigned, unsigned> MDKindMap;
182 // Several operations happen after the module header has been read, but
183 // before function bodies are processed. This keeps track of whether
184 // we've done this yet.
185 bool SeenFirstFunctionBody;
187 /// DeferredFunctionInfo - When function bodies are initially scanned, this
188 /// map contains info about where to find deferred function body in the
190 DenseMap<Function*, uint64_t> DeferredFunctionInfo;
192 /// When Metadata block is initially scanned when parsing the module, we may
193 /// choose to defer parsing of the metadata. This vector contains info about
194 /// which Metadata blocks are deferred.
195 std::vector<uint64_t> DeferredMetadataInfo;
197 /// These are basic blocks forward-referenced by block addresses. They are
198 /// inserted lazily into functions when they're loaded. The basic block ID is
199 /// its index into the vector.
200 DenseMap<Function *, std::vector<BasicBlock *>> BasicBlockFwdRefs;
201 std::deque<Function *> BasicBlockFwdRefQueue;
203 /// UseRelativeIDs - Indicates that we are using a new encoding for
204 /// instruction operands where most operands in the current
205 /// FUNCTION_BLOCK are encoded relative to the instruction number,
206 /// for a more compact encoding. Some instruction operands are not
207 /// relative to the instruction ID: basic block numbers, and types.
208 /// Once the old style function blocks have been phased out, we would
209 /// not need this flag.
212 /// True if all functions will be materialized, negating the need to process
213 /// (e.g.) blockaddress forward references.
214 bool WillMaterializeAllForwardRefs;
216 /// Functions that have block addresses taken. This is usually empty.
217 SmallPtrSet<const Function *, 4> BlockAddressesTaken;
219 /// True if any Metadata block has been materialized.
220 bool IsMetadataMaterialized;
222 bool StripDebugInfo = false;
225 std::error_code Error(BitcodeError E, const Twine &Message);
226 std::error_code Error(BitcodeError E);
227 std::error_code Error(const Twine &Message);
229 explicit BitcodeReader(MemoryBuffer *buffer, LLVMContext &C,
230 DiagnosticHandlerFunction DiagnosticHandler);
231 explicit BitcodeReader(DataStreamer *streamer, LLVMContext &C,
232 DiagnosticHandlerFunction DiagnosticHandler);
233 ~BitcodeReader() override { FreeState(); }
235 std::error_code materializeForwardReferencedFunctions();
239 void releaseBuffer();
241 bool isDematerializable(const GlobalValue *GV) const override;
242 std::error_code materialize(GlobalValue *GV) override;
243 std::error_code MaterializeModule(Module *M) override;
244 std::vector<StructType *> getIdentifiedStructTypes() const override;
245 void Dematerialize(GlobalValue *GV) override;
247 /// @brief Main interface to parsing a bitcode buffer.
248 /// @returns true if an error occurred.
249 std::error_code ParseBitcodeInto(Module *M,
250 bool ShouldLazyLoadMetadata = false);
252 /// @brief Cheap mechanism to just extract module triple
253 /// @returns true if an error occurred.
254 ErrorOr<std::string> parseTriple();
256 static uint64_t decodeSignRotatedValue(uint64_t V);
258 /// Materialize any deferred Metadata block.
259 std::error_code materializeMetadata() override;
261 void setStripDebugInfo() override;
264 std::vector<StructType *> IdentifiedStructTypes;
265 StructType *createIdentifiedStructType(LLVMContext &Context, StringRef Name);
266 StructType *createIdentifiedStructType(LLVMContext &Context);
268 Type *getTypeByID(unsigned ID);
269 Value *getFnValueByID(unsigned ID, Type *Ty) {
270 if (Ty && Ty->isMetadataTy())
271 return MetadataAsValue::get(Ty->getContext(), getFnMetadataByID(ID));
272 return ValueList.getValueFwdRef(ID, Ty);
274 Metadata *getFnMetadataByID(unsigned ID) {
275 return MDValueList.getValueFwdRef(ID);
277 BasicBlock *getBasicBlock(unsigned ID) const {
278 if (ID >= FunctionBBs.size()) return nullptr; // Invalid ID
279 return FunctionBBs[ID];
281 AttributeSet getAttributes(unsigned i) const {
282 if (i-1 < MAttributes.size())
283 return MAttributes[i-1];
284 return AttributeSet();
287 /// getValueTypePair - Read a value/type pair out of the specified record from
288 /// slot 'Slot'. Increment Slot past the number of slots used in the record.
289 /// Return true on failure.
290 bool getValueTypePair(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
291 unsigned InstNum, Value *&ResVal) {
292 if (Slot == Record.size()) return true;
293 unsigned ValNo = (unsigned)Record[Slot++];
294 // Adjust the ValNo, if it was encoded relative to the InstNum.
296 ValNo = InstNum - ValNo;
297 if (ValNo < InstNum) {
298 // If this is not a forward reference, just return the value we already
300 ResVal = getFnValueByID(ValNo, nullptr);
301 return ResVal == nullptr;
303 if (Slot == Record.size())
306 unsigned TypeNo = (unsigned)Record[Slot++];
307 ResVal = getFnValueByID(ValNo, getTypeByID(TypeNo));
308 return ResVal == nullptr;
311 /// popValue - Read a value out of the specified record from slot 'Slot'.
312 /// Increment Slot past the number of slots used by the value in the record.
313 /// Return true if there is an error.
314 bool popValue(SmallVectorImpl<uint64_t> &Record, unsigned &Slot,
315 unsigned InstNum, Type *Ty, Value *&ResVal) {
316 if (getValue(Record, Slot, InstNum, Ty, ResVal))
318 // All values currently take a single record slot.
323 /// getValue -- Like popValue, but does not increment the Slot number.
324 bool getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
325 unsigned InstNum, Type *Ty, Value *&ResVal) {
326 ResVal = getValue(Record, Slot, InstNum, Ty);
327 return ResVal == nullptr;
330 /// getValue -- Version of getValue that returns ResVal directly,
331 /// or 0 if there is an error.
332 Value *getValue(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
333 unsigned InstNum, Type *Ty) {
334 if (Slot == Record.size()) return nullptr;
335 unsigned ValNo = (unsigned)Record[Slot];
336 // Adjust the ValNo, if it was encoded relative to the InstNum.
338 ValNo = InstNum - ValNo;
339 return getFnValueByID(ValNo, Ty);
342 /// getValueSigned -- Like getValue, but decodes signed VBRs.
343 Value *getValueSigned(SmallVectorImpl<uint64_t> &Record, unsigned Slot,
344 unsigned InstNum, Type *Ty) {
345 if (Slot == Record.size()) return nullptr;
346 unsigned ValNo = (unsigned)decodeSignRotatedValue(Record[Slot]);
347 // Adjust the ValNo, if it was encoded relative to the InstNum.
349 ValNo = InstNum - ValNo;
350 return getFnValueByID(ValNo, Ty);
353 /// Converts alignment exponent (i.e. power of two (or zero)) to the
354 /// corresponding alignment to use. If alignment is too large, returns
355 /// a corresponding error code.
356 std::error_code parseAlignmentValue(uint64_t Exponent, unsigned &Alignment);
357 std::error_code ParseAttrKind(uint64_t Code, Attribute::AttrKind *Kind);
358 std::error_code ParseModule(bool Resume, bool ShouldLazyLoadMetadata = false);
359 std::error_code ParseAttributeBlock();
360 std::error_code ParseAttributeGroupBlock();
361 std::error_code ParseTypeTable();
362 std::error_code ParseTypeTableBody();
364 std::error_code ParseValueSymbolTable();
365 std::error_code ParseConstants();
366 std::error_code RememberAndSkipFunctionBody();
367 /// Save the positions of the Metadata blocks and skip parsing the blocks.
368 std::error_code rememberAndSkipMetadata();
369 std::error_code ParseFunctionBody(Function *F);
370 std::error_code GlobalCleanup();
371 std::error_code ResolveGlobalAndAliasInits();
372 std::error_code ParseMetadata();
373 std::error_code ParseMetadataAttachment();
374 ErrorOr<std::string> parseModuleTriple();
375 std::error_code ParseUseLists();
376 std::error_code InitStream();
377 std::error_code InitStreamFromBuffer();
378 std::error_code InitLazyStream();
379 std::error_code FindFunctionInStream(
381 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator);
385 BitcodeDiagnosticInfo::BitcodeDiagnosticInfo(std::error_code EC,
386 DiagnosticSeverity Severity,
388 : DiagnosticInfo(DK_Bitcode, Severity), Msg(Msg), EC(EC) {}
390 void BitcodeDiagnosticInfo::print(DiagnosticPrinter &DP) const { DP << Msg; }
392 static std::error_code Error(DiagnosticHandlerFunction DiagnosticHandler,
393 std::error_code EC, const Twine &Message) {
394 BitcodeDiagnosticInfo DI(EC, DS_Error, Message);
395 DiagnosticHandler(DI);
399 static std::error_code Error(DiagnosticHandlerFunction DiagnosticHandler,
400 std::error_code EC) {
401 return Error(DiagnosticHandler, EC, EC.message());
404 std::error_code BitcodeReader::Error(BitcodeError E, const Twine &Message) {
405 return ::Error(DiagnosticHandler, make_error_code(E), Message);
408 std::error_code BitcodeReader::Error(const Twine &Message) {
409 return ::Error(DiagnosticHandler,
410 make_error_code(BitcodeError::CorruptedBitcode), Message);
413 std::error_code BitcodeReader::Error(BitcodeError E) {
414 return ::Error(DiagnosticHandler, make_error_code(E));
417 static DiagnosticHandlerFunction getDiagHandler(DiagnosticHandlerFunction F,
421 return [&C](const DiagnosticInfo &DI) { C.diagnose(DI); };
424 BitcodeReader::BitcodeReader(MemoryBuffer *buffer, LLVMContext &C,
425 DiagnosticHandlerFunction DiagnosticHandler)
426 : Context(C), DiagnosticHandler(getDiagHandler(DiagnosticHandler, C)),
427 TheModule(nullptr), Buffer(buffer), LazyStreamer(nullptr),
428 NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
429 MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false),
430 WillMaterializeAllForwardRefs(false), IsMetadataMaterialized(false) {}
432 BitcodeReader::BitcodeReader(DataStreamer *streamer, LLVMContext &C,
433 DiagnosticHandlerFunction DiagnosticHandler)
434 : Context(C), DiagnosticHandler(getDiagHandler(DiagnosticHandler, C)),
435 TheModule(nullptr), Buffer(nullptr), LazyStreamer(streamer),
436 NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
437 MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false),
438 WillMaterializeAllForwardRefs(false), IsMetadataMaterialized(false) {}
440 std::error_code BitcodeReader::materializeForwardReferencedFunctions() {
441 if (WillMaterializeAllForwardRefs)
442 return std::error_code();
444 // Prevent recursion.
445 WillMaterializeAllForwardRefs = true;
447 while (!BasicBlockFwdRefQueue.empty()) {
448 Function *F = BasicBlockFwdRefQueue.front();
449 BasicBlockFwdRefQueue.pop_front();
450 assert(F && "Expected valid function");
451 if (!BasicBlockFwdRefs.count(F))
452 // Already materialized.
455 // Check for a function that isn't materializable to prevent an infinite
456 // loop. When parsing a blockaddress stored in a global variable, there
457 // isn't a trivial way to check if a function will have a body without a
458 // linear search through FunctionsWithBodies, so just check it here.
459 if (!F->isMaterializable())
460 return Error("Never resolved function from blockaddress");
462 // Try to materialize F.
463 if (std::error_code EC = materialize(F))
466 assert(BasicBlockFwdRefs.empty() && "Function missing from queue");
469 WillMaterializeAllForwardRefs = false;
470 return std::error_code();
473 void BitcodeReader::FreeState() {
475 std::vector<Type*>().swap(TypeList);
478 std::vector<Comdat *>().swap(ComdatList);
480 std::vector<AttributeSet>().swap(MAttributes);
481 std::vector<BasicBlock*>().swap(FunctionBBs);
482 std::vector<Function*>().swap(FunctionsWithBodies);
483 DeferredFunctionInfo.clear();
484 DeferredMetadataInfo.clear();
487 assert(BasicBlockFwdRefs.empty() && "Unresolved blockaddress fwd references");
488 BasicBlockFwdRefQueue.clear();
491 //===----------------------------------------------------------------------===//
492 // Helper functions to implement forward reference resolution, etc.
493 //===----------------------------------------------------------------------===//
495 /// ConvertToString - Convert a string from a record into an std::string, return
497 template<typename StrTy>
498 static bool ConvertToString(ArrayRef<uint64_t> Record, unsigned Idx,
500 if (Idx > Record.size())
503 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
504 Result += (char)Record[i];
508 static bool hasImplicitComdat(size_t Val) {
512 case 1: // Old WeakAnyLinkage
513 case 4: // Old LinkOnceAnyLinkage
514 case 10: // Old WeakODRLinkage
515 case 11: // Old LinkOnceODRLinkage
520 static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) {
522 default: // Map unknown/new linkages to external
524 return GlobalValue::ExternalLinkage;
526 return GlobalValue::AppendingLinkage;
528 return GlobalValue::InternalLinkage;
530 return GlobalValue::ExternalLinkage; // Obsolete DLLImportLinkage
532 return GlobalValue::ExternalLinkage; // Obsolete DLLExportLinkage
534 return GlobalValue::ExternalWeakLinkage;
536 return GlobalValue::CommonLinkage;
538 return GlobalValue::PrivateLinkage;
540 return GlobalValue::AvailableExternallyLinkage;
542 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateLinkage
544 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateWeakLinkage
546 return GlobalValue::ExternalLinkage; // Obsolete LinkOnceODRAutoHideLinkage
547 case 1: // Old value with implicit comdat.
549 return GlobalValue::WeakAnyLinkage;
550 case 10: // Old value with implicit comdat.
552 return GlobalValue::WeakODRLinkage;
553 case 4: // Old value with implicit comdat.
555 return GlobalValue::LinkOnceAnyLinkage;
556 case 11: // Old value with implicit comdat.
558 return GlobalValue::LinkOnceODRLinkage;
562 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
564 default: // Map unknown visibilities to default.
565 case 0: return GlobalValue::DefaultVisibility;
566 case 1: return GlobalValue::HiddenVisibility;
567 case 2: return GlobalValue::ProtectedVisibility;
571 static GlobalValue::DLLStorageClassTypes
572 GetDecodedDLLStorageClass(unsigned Val) {
574 default: // Map unknown values to default.
575 case 0: return GlobalValue::DefaultStorageClass;
576 case 1: return GlobalValue::DLLImportStorageClass;
577 case 2: return GlobalValue::DLLExportStorageClass;
581 static GlobalVariable::ThreadLocalMode GetDecodedThreadLocalMode(unsigned Val) {
583 case 0: return GlobalVariable::NotThreadLocal;
584 default: // Map unknown non-zero value to general dynamic.
585 case 1: return GlobalVariable::GeneralDynamicTLSModel;
586 case 2: return GlobalVariable::LocalDynamicTLSModel;
587 case 3: return GlobalVariable::InitialExecTLSModel;
588 case 4: return GlobalVariable::LocalExecTLSModel;
592 static int GetDecodedCastOpcode(unsigned Val) {
595 case bitc::CAST_TRUNC : return Instruction::Trunc;
596 case bitc::CAST_ZEXT : return Instruction::ZExt;
597 case bitc::CAST_SEXT : return Instruction::SExt;
598 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
599 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
600 case bitc::CAST_UITOFP : return Instruction::UIToFP;
601 case bitc::CAST_SITOFP : return Instruction::SIToFP;
602 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
603 case bitc::CAST_FPEXT : return Instruction::FPExt;
604 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
605 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
606 case bitc::CAST_BITCAST : return Instruction::BitCast;
607 case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
611 static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
612 bool IsFP = Ty->isFPOrFPVectorTy();
613 // BinOps are only valid for int/fp or vector of int/fp types
614 if (!IsFP && !Ty->isIntOrIntVectorTy())
620 case bitc::BINOP_ADD:
621 return IsFP ? Instruction::FAdd : Instruction::Add;
622 case bitc::BINOP_SUB:
623 return IsFP ? Instruction::FSub : Instruction::Sub;
624 case bitc::BINOP_MUL:
625 return IsFP ? Instruction::FMul : Instruction::Mul;
626 case bitc::BINOP_UDIV:
627 return IsFP ? -1 : Instruction::UDiv;
628 case bitc::BINOP_SDIV:
629 return IsFP ? Instruction::FDiv : Instruction::SDiv;
630 case bitc::BINOP_UREM:
631 return IsFP ? -1 : Instruction::URem;
632 case bitc::BINOP_SREM:
633 return IsFP ? Instruction::FRem : Instruction::SRem;
634 case bitc::BINOP_SHL:
635 return IsFP ? -1 : Instruction::Shl;
636 case bitc::BINOP_LSHR:
637 return IsFP ? -1 : Instruction::LShr;
638 case bitc::BINOP_ASHR:
639 return IsFP ? -1 : Instruction::AShr;
640 case bitc::BINOP_AND:
641 return IsFP ? -1 : Instruction::And;
643 return IsFP ? -1 : Instruction::Or;
644 case bitc::BINOP_XOR:
645 return IsFP ? -1 : Instruction::Xor;
649 static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
651 default: return AtomicRMWInst::BAD_BINOP;
652 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
653 case bitc::RMW_ADD: return AtomicRMWInst::Add;
654 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
655 case bitc::RMW_AND: return AtomicRMWInst::And;
656 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
657 case bitc::RMW_OR: return AtomicRMWInst::Or;
658 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
659 case bitc::RMW_MAX: return AtomicRMWInst::Max;
660 case bitc::RMW_MIN: return AtomicRMWInst::Min;
661 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
662 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
666 static AtomicOrdering GetDecodedOrdering(unsigned Val) {
668 case bitc::ORDERING_NOTATOMIC: return NotAtomic;
669 case bitc::ORDERING_UNORDERED: return Unordered;
670 case bitc::ORDERING_MONOTONIC: return Monotonic;
671 case bitc::ORDERING_ACQUIRE: return Acquire;
672 case bitc::ORDERING_RELEASE: return Release;
673 case bitc::ORDERING_ACQREL: return AcquireRelease;
674 default: // Map unknown orderings to sequentially-consistent.
675 case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
679 static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
681 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
682 default: // Map unknown scopes to cross-thread.
683 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
687 static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
689 default: // Map unknown selection kinds to any.
690 case bitc::COMDAT_SELECTION_KIND_ANY:
692 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
693 return Comdat::ExactMatch;
694 case bitc::COMDAT_SELECTION_KIND_LARGEST:
695 return Comdat::Largest;
696 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
697 return Comdat::NoDuplicates;
698 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
699 return Comdat::SameSize;
703 static void UpgradeDLLImportExportLinkage(llvm::GlobalValue *GV, unsigned Val) {
705 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
706 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
712 /// @brief A class for maintaining the slot number definition
713 /// as a placeholder for the actual definition for forward constants defs.
714 class ConstantPlaceHolder : public ConstantExpr {
715 void operator=(const ConstantPlaceHolder &) = delete;
717 // allocate space for exactly one operand
718 void *operator new(size_t s) {
719 return User::operator new(s, 1);
721 explicit ConstantPlaceHolder(Type *Ty, LLVMContext& Context)
722 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
723 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
726 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
727 static bool classof(const Value *V) {
728 return isa<ConstantExpr>(V) &&
729 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
733 /// Provide fast operand accessors
734 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
738 // FIXME: can we inherit this from ConstantExpr?
740 struct OperandTraits<ConstantPlaceHolder> :
741 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
743 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantPlaceHolder, Value)
747 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
756 WeakVH &OldV = ValuePtrs[Idx];
762 // Handle constants and non-constants (e.g. instrs) differently for
764 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
765 ResolveConstants.push_back(std::make_pair(PHC, Idx));
768 // If there was a forward reference to this value, replace it.
769 Value *PrevVal = OldV;
770 OldV->replaceAllUsesWith(V);
776 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
781 if (Value *V = ValuePtrs[Idx]) {
782 assert(Ty == V->getType() && "Type mismatch in constant table!");
783 return cast<Constant>(V);
786 // Create and return a placeholder, which will later be RAUW'd.
787 Constant *C = new ConstantPlaceHolder(Ty, Context);
792 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, Type *Ty) {
796 if (Value *V = ValuePtrs[Idx]) {
797 assert((!Ty || Ty == V->getType()) && "Type mismatch in value table!");
801 // No type specified, must be invalid reference.
802 if (!Ty) return nullptr;
804 // Create and return a placeholder, which will later be RAUW'd.
805 Value *V = new Argument(Ty);
810 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
811 /// resolves any forward references. The idea behind this is that we sometimes
812 /// get constants (such as large arrays) which reference *many* forward ref
813 /// constants. Replacing each of these causes a lot of thrashing when
814 /// building/reuniquing the constant. Instead of doing this, we look at all the
815 /// uses and rewrite all the place holders at once for any constant that uses
817 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
818 // Sort the values by-pointer so that they are efficient to look up with a
820 std::sort(ResolveConstants.begin(), ResolveConstants.end());
822 SmallVector<Constant*, 64> NewOps;
824 while (!ResolveConstants.empty()) {
825 Value *RealVal = operator[](ResolveConstants.back().second);
826 Constant *Placeholder = ResolveConstants.back().first;
827 ResolveConstants.pop_back();
829 // Loop over all users of the placeholder, updating them to reference the
830 // new value. If they reference more than one placeholder, update them all
832 while (!Placeholder->use_empty()) {
833 auto UI = Placeholder->user_begin();
836 // If the using object isn't uniqued, just update the operands. This
837 // handles instructions and initializers for global variables.
838 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
839 UI.getUse().set(RealVal);
843 // Otherwise, we have a constant that uses the placeholder. Replace that
844 // constant with a new constant that has *all* placeholder uses updated.
845 Constant *UserC = cast<Constant>(U);
846 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
849 if (!isa<ConstantPlaceHolder>(*I)) {
850 // Not a placeholder reference.
852 } else if (*I == Placeholder) {
853 // Common case is that it just references this one placeholder.
856 // Otherwise, look up the placeholder in ResolveConstants.
857 ResolveConstantsTy::iterator It =
858 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
859 std::pair<Constant*, unsigned>(cast<Constant>(*I),
861 assert(It != ResolveConstants.end() && It->first == *I);
862 NewOp = operator[](It->second);
865 NewOps.push_back(cast<Constant>(NewOp));
868 // Make the new constant.
870 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
871 NewC = ConstantArray::get(UserCA->getType(), NewOps);
872 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
873 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
874 } else if (isa<ConstantVector>(UserC)) {
875 NewC = ConstantVector::get(NewOps);
877 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
878 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
881 UserC->replaceAllUsesWith(NewC);
882 UserC->destroyConstant();
886 // Update all ValueHandles, they should be the only users at this point.
887 Placeholder->replaceAllUsesWith(RealVal);
892 void BitcodeReaderMDValueList::AssignValue(Metadata *MD, unsigned Idx) {
901 TrackingMDRef &OldMD = MDValuePtrs[Idx];
907 // If there was a forward reference to this value, replace it.
908 TempMDTuple PrevMD(cast<MDTuple>(OldMD.get()));
909 PrevMD->replaceAllUsesWith(MD);
913 Metadata *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
917 if (Metadata *MD = MDValuePtrs[Idx])
920 // Track forward refs to be resolved later.
922 MinFwdRef = std::min(MinFwdRef, Idx);
923 MaxFwdRef = std::max(MaxFwdRef, Idx);
926 MinFwdRef = MaxFwdRef = Idx;
930 // Create and return a placeholder, which will later be RAUW'd.
931 Metadata *MD = MDNode::getTemporary(Context, None).release();
932 MDValuePtrs[Idx].reset(MD);
936 void BitcodeReaderMDValueList::tryToResolveCycles() {
942 // Still forward references... can't resolve cycles.
945 // Resolve any cycles.
946 for (unsigned I = MinFwdRef, E = MaxFwdRef + 1; I != E; ++I) {
947 auto &MD = MDValuePtrs[I];
948 auto *N = dyn_cast_or_null<MDNode>(MD);
952 assert(!N->isTemporary() && "Unexpected forward reference");
956 // Make sure we return early again until there's another forward ref.
960 Type *BitcodeReader::getTypeByID(unsigned ID) {
961 // The type table size is always specified correctly.
962 if (ID >= TypeList.size())
965 if (Type *Ty = TypeList[ID])
968 // If we have a forward reference, the only possible case is when it is to a
969 // named struct. Just create a placeholder for now.
970 return TypeList[ID] = createIdentifiedStructType(Context);
973 StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
975 auto *Ret = StructType::create(Context, Name);
976 IdentifiedStructTypes.push_back(Ret);
980 StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
981 auto *Ret = StructType::create(Context);
982 IdentifiedStructTypes.push_back(Ret);
987 //===----------------------------------------------------------------------===//
988 // Functions for parsing blocks from the bitcode file
989 //===----------------------------------------------------------------------===//
992 /// \brief This fills an AttrBuilder object with the LLVM attributes that have
993 /// been decoded from the given integer. This function must stay in sync with
994 /// 'encodeLLVMAttributesForBitcode'.
995 static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
996 uint64_t EncodedAttrs) {
997 // FIXME: Remove in 4.0.
999 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
1000 // the bits above 31 down by 11 bits.
1001 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
1002 assert((!Alignment || isPowerOf2_32(Alignment)) &&
1003 "Alignment must be a power of two.");
1006 B.addAlignmentAttr(Alignment);
1007 B.addRawValue(((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
1008 (EncodedAttrs & 0xffff));
1011 std::error_code BitcodeReader::ParseAttributeBlock() {
1012 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
1013 return Error("Invalid record");
1015 if (!MAttributes.empty())
1016 return Error("Invalid multiple blocks");
1018 SmallVector<uint64_t, 64> Record;
1020 SmallVector<AttributeSet, 8> Attrs;
1022 // Read all the records.
1024 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1026 switch (Entry.Kind) {
1027 case BitstreamEntry::SubBlock: // Handled for us already.
1028 case BitstreamEntry::Error:
1029 return Error("Malformed block");
1030 case BitstreamEntry::EndBlock:
1031 return std::error_code();
1032 case BitstreamEntry::Record:
1033 // The interesting case.
1039 switch (Stream.readRecord(Entry.ID, Record)) {
1040 default: // Default behavior: ignore.
1042 case bitc::PARAMATTR_CODE_ENTRY_OLD: { // ENTRY: [paramidx0, attr0, ...]
1043 // FIXME: Remove in 4.0.
1044 if (Record.size() & 1)
1045 return Error("Invalid record");
1047 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1049 decodeLLVMAttributesForBitcode(B, Record[i+1]);
1050 Attrs.push_back(AttributeSet::get(Context, Record[i], B));
1053 MAttributes.push_back(AttributeSet::get(Context, Attrs));
1057 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [attrgrp0, attrgrp1, ...]
1058 for (unsigned i = 0, e = Record.size(); i != e; ++i)
1059 Attrs.push_back(MAttributeGroups[Record[i]]);
1061 MAttributes.push_back(AttributeSet::get(Context, Attrs));
1069 // Returns Attribute::None on unrecognized codes.
1070 static Attribute::AttrKind GetAttrFromCode(uint64_t Code) {
1073 return Attribute::None;
1074 case bitc::ATTR_KIND_ALIGNMENT:
1075 return Attribute::Alignment;
1076 case bitc::ATTR_KIND_ALWAYS_INLINE:
1077 return Attribute::AlwaysInline;
1078 case bitc::ATTR_KIND_BUILTIN:
1079 return Attribute::Builtin;
1080 case bitc::ATTR_KIND_BY_VAL:
1081 return Attribute::ByVal;
1082 case bitc::ATTR_KIND_IN_ALLOCA:
1083 return Attribute::InAlloca;
1084 case bitc::ATTR_KIND_COLD:
1085 return Attribute::Cold;
1086 case bitc::ATTR_KIND_INLINE_HINT:
1087 return Attribute::InlineHint;
1088 case bitc::ATTR_KIND_IN_REG:
1089 return Attribute::InReg;
1090 case bitc::ATTR_KIND_JUMP_TABLE:
1091 return Attribute::JumpTable;
1092 case bitc::ATTR_KIND_MIN_SIZE:
1093 return Attribute::MinSize;
1094 case bitc::ATTR_KIND_NAKED:
1095 return Attribute::Naked;
1096 case bitc::ATTR_KIND_NEST:
1097 return Attribute::Nest;
1098 case bitc::ATTR_KIND_NO_ALIAS:
1099 return Attribute::NoAlias;
1100 case bitc::ATTR_KIND_NO_BUILTIN:
1101 return Attribute::NoBuiltin;
1102 case bitc::ATTR_KIND_NO_CAPTURE:
1103 return Attribute::NoCapture;
1104 case bitc::ATTR_KIND_NO_DUPLICATE:
1105 return Attribute::NoDuplicate;
1106 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
1107 return Attribute::NoImplicitFloat;
1108 case bitc::ATTR_KIND_NO_INLINE:
1109 return Attribute::NoInline;
1110 case bitc::ATTR_KIND_NON_LAZY_BIND:
1111 return Attribute::NonLazyBind;
1112 case bitc::ATTR_KIND_NON_NULL:
1113 return Attribute::NonNull;
1114 case bitc::ATTR_KIND_DEREFERENCEABLE:
1115 return Attribute::Dereferenceable;
1116 case bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL:
1117 return Attribute::DereferenceableOrNull;
1118 case bitc::ATTR_KIND_NO_RED_ZONE:
1119 return Attribute::NoRedZone;
1120 case bitc::ATTR_KIND_NO_RETURN:
1121 return Attribute::NoReturn;
1122 case bitc::ATTR_KIND_NO_UNWIND:
1123 return Attribute::NoUnwind;
1124 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
1125 return Attribute::OptimizeForSize;
1126 case bitc::ATTR_KIND_OPTIMIZE_NONE:
1127 return Attribute::OptimizeNone;
1128 case bitc::ATTR_KIND_READ_NONE:
1129 return Attribute::ReadNone;
1130 case bitc::ATTR_KIND_READ_ONLY:
1131 return Attribute::ReadOnly;
1132 case bitc::ATTR_KIND_RETURNED:
1133 return Attribute::Returned;
1134 case bitc::ATTR_KIND_RETURNS_TWICE:
1135 return Attribute::ReturnsTwice;
1136 case bitc::ATTR_KIND_S_EXT:
1137 return Attribute::SExt;
1138 case bitc::ATTR_KIND_STACK_ALIGNMENT:
1139 return Attribute::StackAlignment;
1140 case bitc::ATTR_KIND_STACK_PROTECT:
1141 return Attribute::StackProtect;
1142 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
1143 return Attribute::StackProtectReq;
1144 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
1145 return Attribute::StackProtectStrong;
1146 case bitc::ATTR_KIND_STRUCT_RET:
1147 return Attribute::StructRet;
1148 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
1149 return Attribute::SanitizeAddress;
1150 case bitc::ATTR_KIND_SANITIZE_THREAD:
1151 return Attribute::SanitizeThread;
1152 case bitc::ATTR_KIND_SANITIZE_MEMORY:
1153 return Attribute::SanitizeMemory;
1154 case bitc::ATTR_KIND_UW_TABLE:
1155 return Attribute::UWTable;
1156 case bitc::ATTR_KIND_Z_EXT:
1157 return Attribute::ZExt;
1161 std::error_code BitcodeReader::parseAlignmentValue(uint64_t Exponent,
1162 unsigned &Alignment) {
1163 // Note: Alignment in bitcode files is incremented by 1, so that zero
1164 // can be used for default alignment.
1165 if (Exponent > Value::MaxAlignmentExponent + 1)
1166 return Error("Invalid alignment value");
1167 Alignment = (1 << static_cast<unsigned>(Exponent)) >> 1;
1168 return std::error_code();
1171 std::error_code BitcodeReader::ParseAttrKind(uint64_t Code,
1172 Attribute::AttrKind *Kind) {
1173 *Kind = GetAttrFromCode(Code);
1174 if (*Kind == Attribute::None)
1175 return Error(BitcodeError::CorruptedBitcode,
1176 "Unknown attribute kind (" + Twine(Code) + ")");
1177 return std::error_code();
1180 std::error_code BitcodeReader::ParseAttributeGroupBlock() {
1181 if (Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
1182 return Error("Invalid record");
1184 if (!MAttributeGroups.empty())
1185 return Error("Invalid multiple blocks");
1187 SmallVector<uint64_t, 64> Record;
1189 // Read all the records.
1191 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1193 switch (Entry.Kind) {
1194 case BitstreamEntry::SubBlock: // Handled for us already.
1195 case BitstreamEntry::Error:
1196 return Error("Malformed block");
1197 case BitstreamEntry::EndBlock:
1198 return std::error_code();
1199 case BitstreamEntry::Record:
1200 // The interesting case.
1206 switch (Stream.readRecord(Entry.ID, Record)) {
1207 default: // Default behavior: ignore.
1209 case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
1210 if (Record.size() < 3)
1211 return Error("Invalid record");
1213 uint64_t GrpID = Record[0];
1214 uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
1217 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1218 if (Record[i] == 0) { // Enum attribute
1219 Attribute::AttrKind Kind;
1220 if (std::error_code EC = ParseAttrKind(Record[++i], &Kind))
1223 B.addAttribute(Kind);
1224 } else if (Record[i] == 1) { // Integer attribute
1225 Attribute::AttrKind Kind;
1226 if (std::error_code EC = ParseAttrKind(Record[++i], &Kind))
1228 if (Kind == Attribute::Alignment)
1229 B.addAlignmentAttr(Record[++i]);
1230 else if (Kind == Attribute::StackAlignment)
1231 B.addStackAlignmentAttr(Record[++i]);
1232 else if (Kind == Attribute::Dereferenceable)
1233 B.addDereferenceableAttr(Record[++i]);
1234 else if (Kind == Attribute::DereferenceableOrNull)
1235 B.addDereferenceableOrNullAttr(Record[++i]);
1236 } else { // String attribute
1237 assert((Record[i] == 3 || Record[i] == 4) &&
1238 "Invalid attribute group entry");
1239 bool HasValue = (Record[i++] == 4);
1240 SmallString<64> KindStr;
1241 SmallString<64> ValStr;
1243 while (Record[i] != 0 && i != e)
1244 KindStr += Record[i++];
1245 assert(Record[i] == 0 && "Kind string not null terminated");
1248 // Has a value associated with it.
1249 ++i; // Skip the '0' that terminates the "kind" string.
1250 while (Record[i] != 0 && i != e)
1251 ValStr += Record[i++];
1252 assert(Record[i] == 0 && "Value string not null terminated");
1255 B.addAttribute(KindStr.str(), ValStr.str());
1259 MAttributeGroups[GrpID] = AttributeSet::get(Context, Idx, B);
1266 std::error_code BitcodeReader::ParseTypeTable() {
1267 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
1268 return Error("Invalid record");
1270 return ParseTypeTableBody();
1273 std::error_code BitcodeReader::ParseTypeTableBody() {
1274 if (!TypeList.empty())
1275 return Error("Invalid multiple blocks");
1277 SmallVector<uint64_t, 64> Record;
1278 unsigned NumRecords = 0;
1280 SmallString<64> TypeName;
1282 // Read all the records for this type table.
1284 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1286 switch (Entry.Kind) {
1287 case BitstreamEntry::SubBlock: // Handled for us already.
1288 case BitstreamEntry::Error:
1289 return Error("Malformed block");
1290 case BitstreamEntry::EndBlock:
1291 if (NumRecords != TypeList.size())
1292 return Error("Malformed block");
1293 return std::error_code();
1294 case BitstreamEntry::Record:
1295 // The interesting case.
1301 Type *ResultTy = nullptr;
1302 switch (Stream.readRecord(Entry.ID, Record)) {
1304 return Error("Invalid value");
1305 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
1306 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
1307 // type list. This allows us to reserve space.
1308 if (Record.size() < 1)
1309 return Error("Invalid record");
1310 TypeList.resize(Record[0]);
1312 case bitc::TYPE_CODE_VOID: // VOID
1313 ResultTy = Type::getVoidTy(Context);
1315 case bitc::TYPE_CODE_HALF: // HALF
1316 ResultTy = Type::getHalfTy(Context);
1318 case bitc::TYPE_CODE_FLOAT: // FLOAT
1319 ResultTy = Type::getFloatTy(Context);
1321 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
1322 ResultTy = Type::getDoubleTy(Context);
1324 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
1325 ResultTy = Type::getX86_FP80Ty(Context);
1327 case bitc::TYPE_CODE_FP128: // FP128
1328 ResultTy = Type::getFP128Ty(Context);
1330 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
1331 ResultTy = Type::getPPC_FP128Ty(Context);
1333 case bitc::TYPE_CODE_LABEL: // LABEL
1334 ResultTy = Type::getLabelTy(Context);
1336 case bitc::TYPE_CODE_METADATA: // METADATA
1337 ResultTy = Type::getMetadataTy(Context);
1339 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
1340 ResultTy = Type::getX86_MMXTy(Context);
1342 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
1343 if (Record.size() < 1)
1344 return Error("Invalid record");
1346 uint64_t NumBits = Record[0];
1347 if (NumBits < IntegerType::MIN_INT_BITS ||
1348 NumBits > IntegerType::MAX_INT_BITS)
1349 return Error("Bitwidth for integer type out of range");
1350 ResultTy = IntegerType::get(Context, NumBits);
1353 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
1354 // [pointee type, address space]
1355 if (Record.size() < 1)
1356 return Error("Invalid record");
1357 unsigned AddressSpace = 0;
1358 if (Record.size() == 2)
1359 AddressSpace = Record[1];
1360 ResultTy = getTypeByID(Record[0]);
1362 return Error("Invalid type");
1363 ResultTy = PointerType::get(ResultTy, AddressSpace);
1366 case bitc::TYPE_CODE_FUNCTION_OLD: {
1367 // FIXME: attrid is dead, remove it in LLVM 4.0
1368 // FUNCTION: [vararg, attrid, retty, paramty x N]
1369 if (Record.size() < 3)
1370 return Error("Invalid record");
1371 SmallVector<Type*, 8> ArgTys;
1372 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1373 if (Type *T = getTypeByID(Record[i]))
1374 ArgTys.push_back(T);
1379 ResultTy = getTypeByID(Record[2]);
1380 if (!ResultTy || ArgTys.size() < Record.size()-3)
1381 return Error("Invalid type");
1383 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1386 case bitc::TYPE_CODE_FUNCTION: {
1387 // FUNCTION: [vararg, retty, paramty x N]
1388 if (Record.size() < 2)
1389 return Error("Invalid record");
1390 SmallVector<Type*, 8> ArgTys;
1391 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1392 if (Type *T = getTypeByID(Record[i]))
1393 ArgTys.push_back(T);
1398 ResultTy = getTypeByID(Record[1]);
1399 if (!ResultTy || ArgTys.size() < Record.size()-2)
1400 return Error("Invalid type");
1402 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1405 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1406 if (Record.size() < 1)
1407 return Error("Invalid record");
1408 SmallVector<Type*, 8> EltTys;
1409 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1410 if (Type *T = getTypeByID(Record[i]))
1411 EltTys.push_back(T);
1415 if (EltTys.size() != Record.size()-1)
1416 return Error("Invalid type");
1417 ResultTy = StructType::get(Context, EltTys, Record[0]);
1420 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1421 if (ConvertToString(Record, 0, TypeName))
1422 return Error("Invalid record");
1425 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1426 if (Record.size() < 1)
1427 return Error("Invalid record");
1429 if (NumRecords >= TypeList.size())
1430 return Error("Invalid TYPE table");
1432 // Check to see if this was forward referenced, if so fill in the temp.
1433 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1435 Res->setName(TypeName);
1436 TypeList[NumRecords] = nullptr;
1437 } else // Otherwise, create a new struct.
1438 Res = createIdentifiedStructType(Context, TypeName);
1441 SmallVector<Type*, 8> EltTys;
1442 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1443 if (Type *T = getTypeByID(Record[i]))
1444 EltTys.push_back(T);
1448 if (EltTys.size() != Record.size()-1)
1449 return Error("Invalid record");
1450 Res->setBody(EltTys, Record[0]);
1454 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1455 if (Record.size() != 1)
1456 return Error("Invalid record");
1458 if (NumRecords >= TypeList.size())
1459 return Error("Invalid TYPE table");
1461 // Check to see if this was forward referenced, if so fill in the temp.
1462 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1464 Res->setName(TypeName);
1465 TypeList[NumRecords] = nullptr;
1466 } else // Otherwise, create a new struct with no body.
1467 Res = createIdentifiedStructType(Context, TypeName);
1472 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1473 if (Record.size() < 2)
1474 return Error("Invalid record");
1475 if ((ResultTy = getTypeByID(Record[1])))
1476 ResultTy = ArrayType::get(ResultTy, Record[0]);
1478 return Error("Invalid type");
1480 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
1481 if (Record.size() < 2)
1482 return Error("Invalid record");
1483 if ((ResultTy = getTypeByID(Record[1])))
1484 ResultTy = VectorType::get(ResultTy, Record[0]);
1486 return Error("Invalid type");
1490 if (NumRecords >= TypeList.size())
1491 return Error("Invalid TYPE table");
1492 if (TypeList[NumRecords])
1494 "Invalid TYPE table: Only named structs can be forward referenced");
1495 assert(ResultTy && "Didn't read a type?");
1496 TypeList[NumRecords++] = ResultTy;
1500 std::error_code BitcodeReader::ParseValueSymbolTable() {
1501 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
1502 return Error("Invalid record");
1504 SmallVector<uint64_t, 64> Record;
1506 Triple TT(TheModule->getTargetTriple());
1508 // Read all the records for this value table.
1509 SmallString<128> ValueName;
1511 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1513 switch (Entry.Kind) {
1514 case BitstreamEntry::SubBlock: // Handled for us already.
1515 case BitstreamEntry::Error:
1516 return Error("Malformed block");
1517 case BitstreamEntry::EndBlock:
1518 return std::error_code();
1519 case BitstreamEntry::Record:
1520 // The interesting case.
1526 switch (Stream.readRecord(Entry.ID, Record)) {
1527 default: // Default behavior: unknown type.
1529 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
1530 if (ConvertToString(Record, 1, ValueName))
1531 return Error("Invalid record");
1532 unsigned ValueID = Record[0];
1533 if (ValueID >= ValueList.size() || !ValueList[ValueID])
1534 return Error("Invalid record");
1535 Value *V = ValueList[ValueID];
1537 V->setName(StringRef(ValueName.data(), ValueName.size()));
1538 if (auto *GO = dyn_cast<GlobalObject>(V)) {
1539 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
1540 if (TT.isOSBinFormatMachO())
1541 GO->setComdat(nullptr);
1543 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
1549 case bitc::VST_CODE_BBENTRY: {
1550 if (ConvertToString(Record, 1, ValueName))
1551 return Error("Invalid record");
1552 BasicBlock *BB = getBasicBlock(Record[0]);
1554 return Error("Invalid record");
1556 BB->setName(StringRef(ValueName.data(), ValueName.size()));
1564 static int64_t unrotateSign(uint64_t U) { return U & 1 ? ~(U >> 1) : U >> 1; }
1566 std::error_code BitcodeReader::ParseMetadata() {
1567 IsMetadataMaterialized = true;
1568 unsigned NextMDValueNo = MDValueList.size();
1570 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
1571 return Error("Invalid record");
1573 SmallVector<uint64_t, 64> Record;
1576 [&](unsigned ID) -> Metadata *{ return MDValueList.getValueFwdRef(ID); };
1577 auto getMDOrNull = [&](unsigned ID) -> Metadata *{
1579 return getMD(ID - 1);
1582 auto getMDString = [&](unsigned ID) -> MDString *{
1583 // This requires that the ID is not really a forward reference. In
1584 // particular, the MDString must already have been resolved.
1585 return cast_or_null<MDString>(getMDOrNull(ID));
1588 #define GET_OR_DISTINCT(CLASS, DISTINCT, ARGS) \
1589 (DISTINCT ? CLASS::getDistinct ARGS : CLASS::get ARGS)
1591 // Read all the records.
1593 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1595 switch (Entry.Kind) {
1596 case BitstreamEntry::SubBlock: // Handled for us already.
1597 case BitstreamEntry::Error:
1598 return Error("Malformed block");
1599 case BitstreamEntry::EndBlock:
1600 MDValueList.tryToResolveCycles();
1601 return std::error_code();
1602 case BitstreamEntry::Record:
1603 // The interesting case.
1609 unsigned Code = Stream.readRecord(Entry.ID, Record);
1610 bool IsDistinct = false;
1612 default: // Default behavior: ignore.
1614 case bitc::METADATA_NAME: {
1615 // Read name of the named metadata.
1616 SmallString<8> Name(Record.begin(), Record.end());
1618 Code = Stream.ReadCode();
1620 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
1621 unsigned NextBitCode = Stream.readRecord(Code, Record);
1622 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
1624 // Read named metadata elements.
1625 unsigned Size = Record.size();
1626 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
1627 for (unsigned i = 0; i != Size; ++i) {
1628 MDNode *MD = dyn_cast_or_null<MDNode>(MDValueList.getValueFwdRef(Record[i]));
1630 return Error("Invalid record");
1631 NMD->addOperand(MD);
1635 case bitc::METADATA_OLD_FN_NODE: {
1636 // FIXME: Remove in 4.0.
1637 // This is a LocalAsMetadata record, the only type of function-local
1639 if (Record.size() % 2 == 1)
1640 return Error("Invalid record");
1642 // If this isn't a LocalAsMetadata record, we're dropping it. This used
1643 // to be legal, but there's no upgrade path.
1644 auto dropRecord = [&] {
1645 MDValueList.AssignValue(MDNode::get(Context, None), NextMDValueNo++);
1647 if (Record.size() != 2) {
1652 Type *Ty = getTypeByID(Record[0]);
1653 if (Ty->isMetadataTy() || Ty->isVoidTy()) {
1658 MDValueList.AssignValue(
1659 LocalAsMetadata::get(ValueList.getValueFwdRef(Record[1], Ty)),
1663 case bitc::METADATA_OLD_NODE: {
1664 // FIXME: Remove in 4.0.
1665 if (Record.size() % 2 == 1)
1666 return Error("Invalid record");
1668 unsigned Size = Record.size();
1669 SmallVector<Metadata *, 8> Elts;
1670 for (unsigned i = 0; i != Size; i += 2) {
1671 Type *Ty = getTypeByID(Record[i]);
1673 return Error("Invalid record");
1674 if (Ty->isMetadataTy())
1675 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
1676 else if (!Ty->isVoidTy()) {
1678 ValueAsMetadata::get(ValueList.getValueFwdRef(Record[i + 1], Ty));
1679 assert(isa<ConstantAsMetadata>(MD) &&
1680 "Expected non-function-local metadata");
1683 Elts.push_back(nullptr);
1685 MDValueList.AssignValue(MDNode::get(Context, Elts), NextMDValueNo++);
1688 case bitc::METADATA_VALUE: {
1689 if (Record.size() != 2)
1690 return Error("Invalid record");
1692 Type *Ty = getTypeByID(Record[0]);
1693 if (Ty->isMetadataTy() || Ty->isVoidTy())
1694 return Error("Invalid record");
1696 MDValueList.AssignValue(
1697 ValueAsMetadata::get(ValueList.getValueFwdRef(Record[1], Ty)),
1701 case bitc::METADATA_DISTINCT_NODE:
1704 case bitc::METADATA_NODE: {
1705 SmallVector<Metadata *, 8> Elts;
1706 Elts.reserve(Record.size());
1707 for (unsigned ID : Record)
1708 Elts.push_back(ID ? MDValueList.getValueFwdRef(ID - 1) : nullptr);
1709 MDValueList.AssignValue(IsDistinct ? MDNode::getDistinct(Context, Elts)
1710 : MDNode::get(Context, Elts),
1714 case bitc::METADATA_LOCATION: {
1715 if (Record.size() != 5)
1716 return Error("Invalid record");
1718 unsigned Line = Record[1];
1719 unsigned Column = Record[2];
1720 MDNode *Scope = cast<MDNode>(MDValueList.getValueFwdRef(Record[3]));
1721 Metadata *InlinedAt =
1722 Record[4] ? MDValueList.getValueFwdRef(Record[4] - 1) : nullptr;
1723 MDValueList.AssignValue(
1724 GET_OR_DISTINCT(MDLocation, Record[0],
1725 (Context, Line, Column, Scope, InlinedAt)),
1729 case bitc::METADATA_GENERIC_DEBUG: {
1730 if (Record.size() < 4)
1731 return Error("Invalid record");
1733 unsigned Tag = Record[1];
1734 unsigned Version = Record[2];
1736 if (Tag >= 1u << 16 || Version != 0)
1737 return Error("Invalid record");
1739 auto *Header = getMDString(Record[3]);
1740 SmallVector<Metadata *, 8> DwarfOps;
1741 for (unsigned I = 4, E = Record.size(); I != E; ++I)
1742 DwarfOps.push_back(Record[I] ? MDValueList.getValueFwdRef(Record[I] - 1)
1744 MDValueList.AssignValue(GET_OR_DISTINCT(GenericDebugNode, Record[0],
1745 (Context, Tag, Header, DwarfOps)),
1749 case bitc::METADATA_SUBRANGE: {
1750 if (Record.size() != 3)
1751 return Error("Invalid record");
1753 MDValueList.AssignValue(
1754 GET_OR_DISTINCT(MDSubrange, Record[0],
1755 (Context, Record[1], unrotateSign(Record[2]))),
1759 case bitc::METADATA_ENUMERATOR: {
1760 if (Record.size() != 3)
1761 return Error("Invalid record");
1763 MDValueList.AssignValue(GET_OR_DISTINCT(MDEnumerator, Record[0],
1764 (Context, unrotateSign(Record[1]),
1765 getMDString(Record[2]))),
1769 case bitc::METADATA_BASIC_TYPE: {
1770 if (Record.size() != 6)
1771 return Error("Invalid record");
1773 MDValueList.AssignValue(
1774 GET_OR_DISTINCT(MDBasicType, Record[0],
1775 (Context, Record[1], getMDString(Record[2]),
1776 Record[3], Record[4], Record[5])),
1780 case bitc::METADATA_DERIVED_TYPE: {
1781 if (Record.size() != 12)
1782 return Error("Invalid record");
1784 MDValueList.AssignValue(
1785 GET_OR_DISTINCT(MDDerivedType, Record[0],
1786 (Context, Record[1], getMDString(Record[2]),
1787 getMDOrNull(Record[3]), Record[4],
1788 getMDOrNull(Record[5]), getMDOrNull(Record[6]),
1789 Record[7], Record[8], Record[9], Record[10],
1790 getMDOrNull(Record[11]))),
1794 case bitc::METADATA_COMPOSITE_TYPE: {
1795 if (Record.size() != 16)
1796 return Error("Invalid record");
1798 MDValueList.AssignValue(
1799 GET_OR_DISTINCT(MDCompositeType, Record[0],
1800 (Context, Record[1], getMDString(Record[2]),
1801 getMDOrNull(Record[3]), Record[4],
1802 getMDOrNull(Record[5]), getMDOrNull(Record[6]),
1803 Record[7], Record[8], Record[9], Record[10],
1804 getMDOrNull(Record[11]), Record[12],
1805 getMDOrNull(Record[13]), getMDOrNull(Record[14]),
1806 getMDString(Record[15]))),
1810 case bitc::METADATA_SUBROUTINE_TYPE: {
1811 if (Record.size() != 3)
1812 return Error("Invalid record");
1814 MDValueList.AssignValue(
1815 GET_OR_DISTINCT(MDSubroutineType, Record[0],
1816 (Context, Record[1], getMDOrNull(Record[2]))),
1820 case bitc::METADATA_FILE: {
1821 if (Record.size() != 3)
1822 return Error("Invalid record");
1824 MDValueList.AssignValue(
1825 GET_OR_DISTINCT(MDFile, Record[0], (Context, getMDString(Record[1]),
1826 getMDString(Record[2]))),
1830 case bitc::METADATA_COMPILE_UNIT: {
1831 if (Record.size() != 14)
1832 return Error("Invalid record");
1834 MDValueList.AssignValue(
1835 GET_OR_DISTINCT(MDCompileUnit, Record[0],
1836 (Context, Record[1], getMDOrNull(Record[2]),
1837 getMDString(Record[3]), Record[4],
1838 getMDString(Record[5]), Record[6],
1839 getMDString(Record[7]), Record[8],
1840 getMDOrNull(Record[9]), getMDOrNull(Record[10]),
1841 getMDOrNull(Record[11]), getMDOrNull(Record[12]),
1842 getMDOrNull(Record[13]))),
1846 case bitc::METADATA_SUBPROGRAM: {
1847 if (Record.size() != 19)
1848 return Error("Invalid record");
1850 MDValueList.AssignValue(
1852 MDSubprogram, Record[0],
1853 (Context, getMDOrNull(Record[1]), getMDString(Record[2]),
1854 getMDString(Record[3]), getMDOrNull(Record[4]), Record[5],
1855 getMDOrNull(Record[6]), Record[7], Record[8], Record[9],
1856 getMDOrNull(Record[10]), Record[11], Record[12], Record[13],
1857 Record[14], getMDOrNull(Record[15]), getMDOrNull(Record[16]),
1858 getMDOrNull(Record[17]), getMDOrNull(Record[18]))),
1862 case bitc::METADATA_LEXICAL_BLOCK: {
1863 if (Record.size() != 5)
1864 return Error("Invalid record");
1866 MDValueList.AssignValue(
1867 GET_OR_DISTINCT(MDLexicalBlock, Record[0],
1868 (Context, getMDOrNull(Record[1]),
1869 getMDOrNull(Record[2]), Record[3], Record[4])),
1873 case bitc::METADATA_LEXICAL_BLOCK_FILE: {
1874 if (Record.size() != 4)
1875 return Error("Invalid record");
1877 MDValueList.AssignValue(
1878 GET_OR_DISTINCT(MDLexicalBlockFile, Record[0],
1879 (Context, getMDOrNull(Record[1]),
1880 getMDOrNull(Record[2]), Record[3])),
1884 case bitc::METADATA_NAMESPACE: {
1885 if (Record.size() != 5)
1886 return Error("Invalid record");
1888 MDValueList.AssignValue(
1889 GET_OR_DISTINCT(MDNamespace, Record[0],
1890 (Context, getMDOrNull(Record[1]),
1891 getMDOrNull(Record[2]), getMDString(Record[3]),
1896 case bitc::METADATA_TEMPLATE_TYPE: {
1897 if (Record.size() != 3)
1898 return Error("Invalid record");
1900 MDValueList.AssignValue(GET_OR_DISTINCT(MDTemplateTypeParameter,
1902 (Context, getMDString(Record[1]),
1903 getMDOrNull(Record[2]))),
1907 case bitc::METADATA_TEMPLATE_VALUE: {
1908 if (Record.size() != 5)
1909 return Error("Invalid record");
1911 MDValueList.AssignValue(
1912 GET_OR_DISTINCT(MDTemplateValueParameter, Record[0],
1913 (Context, Record[1], getMDString(Record[2]),
1914 getMDOrNull(Record[3]), getMDOrNull(Record[4]))),
1918 case bitc::METADATA_GLOBAL_VAR: {
1919 if (Record.size() != 11)
1920 return Error("Invalid record");
1922 MDValueList.AssignValue(
1923 GET_OR_DISTINCT(MDGlobalVariable, Record[0],
1924 (Context, getMDOrNull(Record[1]),
1925 getMDString(Record[2]), getMDString(Record[3]),
1926 getMDOrNull(Record[4]), Record[5],
1927 getMDOrNull(Record[6]), Record[7], Record[8],
1928 getMDOrNull(Record[9]), getMDOrNull(Record[10]))),
1932 case bitc::METADATA_LOCAL_VAR: {
1933 // 10th field is for the obseleted 'inlinedAt:' field.
1934 if (Record.size() != 9 && Record.size() != 10)
1935 return Error("Invalid record");
1937 MDValueList.AssignValue(
1938 GET_OR_DISTINCT(MDLocalVariable, Record[0],
1939 (Context, Record[1], getMDOrNull(Record[2]),
1940 getMDString(Record[3]), getMDOrNull(Record[4]),
1941 Record[5], getMDOrNull(Record[6]), Record[7],
1946 case bitc::METADATA_EXPRESSION: {
1947 if (Record.size() < 1)
1948 return Error("Invalid record");
1950 MDValueList.AssignValue(
1951 GET_OR_DISTINCT(MDExpression, Record[0],
1952 (Context, makeArrayRef(Record).slice(1))),
1956 case bitc::METADATA_OBJC_PROPERTY: {
1957 if (Record.size() != 8)
1958 return Error("Invalid record");
1960 MDValueList.AssignValue(
1961 GET_OR_DISTINCT(MDObjCProperty, Record[0],
1962 (Context, getMDString(Record[1]),
1963 getMDOrNull(Record[2]), Record[3],
1964 getMDString(Record[4]), getMDString(Record[5]),
1965 Record[6], getMDOrNull(Record[7]))),
1969 case bitc::METADATA_IMPORTED_ENTITY: {
1970 if (Record.size() != 6)
1971 return Error("Invalid record");
1973 MDValueList.AssignValue(
1974 GET_OR_DISTINCT(MDImportedEntity, Record[0],
1975 (Context, Record[1], getMDOrNull(Record[2]),
1976 getMDOrNull(Record[3]), Record[4],
1977 getMDString(Record[5]))),
1981 case bitc::METADATA_STRING: {
1982 std::string String(Record.begin(), Record.end());
1983 llvm::UpgradeMDStringConstant(String);
1984 Metadata *MD = MDString::get(Context, String);
1985 MDValueList.AssignValue(MD, NextMDValueNo++);
1988 case bitc::METADATA_KIND: {
1989 if (Record.size() < 2)
1990 return Error("Invalid record");
1992 unsigned Kind = Record[0];
1993 SmallString<8> Name(Record.begin()+1, Record.end());
1995 unsigned NewKind = TheModule->getMDKindID(Name.str());
1996 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
1997 return Error("Conflicting METADATA_KIND records");
2002 #undef GET_OR_DISTINCT
2005 /// decodeSignRotatedValue - Decode a signed value stored with the sign bit in
2006 /// the LSB for dense VBR encoding.
2007 uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
2012 // There is no such thing as -0 with integers. "-0" really means MININT.
2016 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
2017 /// values and aliases that we can.
2018 std::error_code BitcodeReader::ResolveGlobalAndAliasInits() {
2019 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
2020 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
2021 std::vector<std::pair<Function*, unsigned> > FunctionPrefixWorklist;
2022 std::vector<std::pair<Function*, unsigned> > FunctionPrologueWorklist;
2024 GlobalInitWorklist.swap(GlobalInits);
2025 AliasInitWorklist.swap(AliasInits);
2026 FunctionPrefixWorklist.swap(FunctionPrefixes);
2027 FunctionPrologueWorklist.swap(FunctionPrologues);
2029 while (!GlobalInitWorklist.empty()) {
2030 unsigned ValID = GlobalInitWorklist.back().second;
2031 if (ValID >= ValueList.size()) {
2032 // Not ready to resolve this yet, it requires something later in the file.
2033 GlobalInits.push_back(GlobalInitWorklist.back());
2035 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2036 GlobalInitWorklist.back().first->setInitializer(C);
2038 return Error("Expected a constant");
2040 GlobalInitWorklist.pop_back();
2043 while (!AliasInitWorklist.empty()) {
2044 unsigned ValID = AliasInitWorklist.back().second;
2045 if (ValID >= ValueList.size()) {
2046 AliasInits.push_back(AliasInitWorklist.back());
2048 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2049 AliasInitWorklist.back().first->setAliasee(C);
2051 return Error("Expected a constant");
2053 AliasInitWorklist.pop_back();
2056 while (!FunctionPrefixWorklist.empty()) {
2057 unsigned ValID = FunctionPrefixWorklist.back().second;
2058 if (ValID >= ValueList.size()) {
2059 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
2061 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2062 FunctionPrefixWorklist.back().first->setPrefixData(C);
2064 return Error("Expected a constant");
2066 FunctionPrefixWorklist.pop_back();
2069 while (!FunctionPrologueWorklist.empty()) {
2070 unsigned ValID = FunctionPrologueWorklist.back().second;
2071 if (ValID >= ValueList.size()) {
2072 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
2074 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2075 FunctionPrologueWorklist.back().first->setPrologueData(C);
2077 return Error("Expected a constant");
2079 FunctionPrologueWorklist.pop_back();
2082 return std::error_code();
2085 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
2086 SmallVector<uint64_t, 8> Words(Vals.size());
2087 std::transform(Vals.begin(), Vals.end(), Words.begin(),
2088 BitcodeReader::decodeSignRotatedValue);
2090 return APInt(TypeBits, Words);
2093 std::error_code BitcodeReader::ParseConstants() {
2094 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
2095 return Error("Invalid record");
2097 SmallVector<uint64_t, 64> Record;
2099 // Read all the records for this value table.
2100 Type *CurTy = Type::getInt32Ty(Context);
2101 unsigned NextCstNo = ValueList.size();
2103 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2105 switch (Entry.Kind) {
2106 case BitstreamEntry::SubBlock: // Handled for us already.
2107 case BitstreamEntry::Error:
2108 return Error("Malformed block");
2109 case BitstreamEntry::EndBlock:
2110 if (NextCstNo != ValueList.size())
2111 return Error("Invalid ronstant reference");
2113 // Once all the constants have been read, go through and resolve forward
2115 ValueList.ResolveConstantForwardRefs();
2116 return std::error_code();
2117 case BitstreamEntry::Record:
2118 // The interesting case.
2125 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
2127 default: // Default behavior: unknown constant
2128 case bitc::CST_CODE_UNDEF: // UNDEF
2129 V = UndefValue::get(CurTy);
2131 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
2133 return Error("Invalid record");
2134 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
2135 return Error("Invalid record");
2136 CurTy = TypeList[Record[0]];
2137 continue; // Skip the ValueList manipulation.
2138 case bitc::CST_CODE_NULL: // NULL
2139 V = Constant::getNullValue(CurTy);
2141 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
2142 if (!CurTy->isIntegerTy() || Record.empty())
2143 return Error("Invalid record");
2144 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
2146 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
2147 if (!CurTy->isIntegerTy() || Record.empty())
2148 return Error("Invalid record");
2150 APInt VInt = ReadWideAPInt(Record,
2151 cast<IntegerType>(CurTy)->getBitWidth());
2152 V = ConstantInt::get(Context, VInt);
2156 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
2158 return Error("Invalid record");
2159 if (CurTy->isHalfTy())
2160 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf,
2161 APInt(16, (uint16_t)Record[0])));
2162 else if (CurTy->isFloatTy())
2163 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle,
2164 APInt(32, (uint32_t)Record[0])));
2165 else if (CurTy->isDoubleTy())
2166 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble,
2167 APInt(64, Record[0])));
2168 else if (CurTy->isX86_FP80Ty()) {
2169 // Bits are not stored the same way as a normal i80 APInt, compensate.
2170 uint64_t Rearrange[2];
2171 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
2172 Rearrange[1] = Record[0] >> 48;
2173 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended,
2174 APInt(80, Rearrange)));
2175 } else if (CurTy->isFP128Ty())
2176 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad,
2177 APInt(128, Record)));
2178 else if (CurTy->isPPC_FP128Ty())
2179 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble,
2180 APInt(128, Record)));
2182 V = UndefValue::get(CurTy);
2186 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
2188 return Error("Invalid record");
2190 unsigned Size = Record.size();
2191 SmallVector<Constant*, 16> Elts;
2193 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
2194 for (unsigned i = 0; i != Size; ++i)
2195 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
2196 STy->getElementType(i)));
2197 V = ConstantStruct::get(STy, Elts);
2198 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
2199 Type *EltTy = ATy->getElementType();
2200 for (unsigned i = 0; i != Size; ++i)
2201 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2202 V = ConstantArray::get(ATy, Elts);
2203 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
2204 Type *EltTy = VTy->getElementType();
2205 for (unsigned i = 0; i != Size; ++i)
2206 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2207 V = ConstantVector::get(Elts);
2209 V = UndefValue::get(CurTy);
2213 case bitc::CST_CODE_STRING: // STRING: [values]
2214 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
2216 return Error("Invalid record");
2218 SmallString<16> Elts(Record.begin(), Record.end());
2219 V = ConstantDataArray::getString(Context, Elts,
2220 BitCode == bitc::CST_CODE_CSTRING);
2223 case bitc::CST_CODE_DATA: {// DATA: [n x value]
2225 return Error("Invalid record");
2227 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
2228 unsigned Size = Record.size();
2230 if (EltTy->isIntegerTy(8)) {
2231 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
2232 if (isa<VectorType>(CurTy))
2233 V = ConstantDataVector::get(Context, Elts);
2235 V = ConstantDataArray::get(Context, Elts);
2236 } else if (EltTy->isIntegerTy(16)) {
2237 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2238 if (isa<VectorType>(CurTy))
2239 V = ConstantDataVector::get(Context, Elts);
2241 V = ConstantDataArray::get(Context, Elts);
2242 } else if (EltTy->isIntegerTy(32)) {
2243 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2244 if (isa<VectorType>(CurTy))
2245 V = ConstantDataVector::get(Context, Elts);
2247 V = ConstantDataArray::get(Context, Elts);
2248 } else if (EltTy->isIntegerTy(64)) {
2249 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2250 if (isa<VectorType>(CurTy))
2251 V = ConstantDataVector::get(Context, Elts);
2253 V = ConstantDataArray::get(Context, Elts);
2254 } else if (EltTy->isFloatTy()) {
2255 SmallVector<float, 16> Elts(Size);
2256 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
2257 if (isa<VectorType>(CurTy))
2258 V = ConstantDataVector::get(Context, Elts);
2260 V = ConstantDataArray::get(Context, Elts);
2261 } else if (EltTy->isDoubleTy()) {
2262 SmallVector<double, 16> Elts(Size);
2263 std::transform(Record.begin(), Record.end(), Elts.begin(),
2265 if (isa<VectorType>(CurTy))
2266 V = ConstantDataVector::get(Context, Elts);
2268 V = ConstantDataArray::get(Context, Elts);
2270 return Error("Invalid type for value");
2275 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
2276 if (Record.size() < 3)
2277 return Error("Invalid record");
2278 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
2280 V = UndefValue::get(CurTy); // Unknown binop.
2282 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2283 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
2285 if (Record.size() >= 4) {
2286 if (Opc == Instruction::Add ||
2287 Opc == Instruction::Sub ||
2288 Opc == Instruction::Mul ||
2289 Opc == Instruction::Shl) {
2290 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2291 Flags |= OverflowingBinaryOperator::NoSignedWrap;
2292 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2293 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2294 } else if (Opc == Instruction::SDiv ||
2295 Opc == Instruction::UDiv ||
2296 Opc == Instruction::LShr ||
2297 Opc == Instruction::AShr) {
2298 if (Record[3] & (1 << bitc::PEO_EXACT))
2299 Flags |= SDivOperator::IsExact;
2302 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
2306 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
2307 if (Record.size() < 3)
2308 return Error("Invalid record");
2309 int Opc = GetDecodedCastOpcode(Record[0]);
2311 V = UndefValue::get(CurTy); // Unknown cast.
2313 Type *OpTy = getTypeByID(Record[1]);
2315 return Error("Invalid record");
2316 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
2317 V = UpgradeBitCastExpr(Opc, Op, CurTy);
2318 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
2322 case bitc::CST_CODE_CE_INBOUNDS_GEP:
2323 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
2325 Type *PointeeType = nullptr;
2326 if (Record.size() % 2)
2327 PointeeType = getTypeByID(Record[OpNum++]);
2328 SmallVector<Constant*, 16> Elts;
2329 while (OpNum != Record.size()) {
2330 Type *ElTy = getTypeByID(Record[OpNum++]);
2332 return Error("Invalid record");
2333 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
2338 cast<SequentialType>(Elts[0]->getType()->getScalarType())
2340 return Error("Explicit gep operator type does not match pointee type "
2341 "of pointer operand");
2343 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2344 V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
2346 bitc::CST_CODE_CE_INBOUNDS_GEP);
2349 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
2350 if (Record.size() < 3)
2351 return Error("Invalid record");
2353 Type *SelectorTy = Type::getInt1Ty(Context);
2355 // If CurTy is a vector of length n, then Record[0] must be a <n x i1>
2356 // vector. Otherwise, it must be a single bit.
2357 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
2358 SelectorTy = VectorType::get(Type::getInt1Ty(Context),
2359 VTy->getNumElements());
2361 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
2363 ValueList.getConstantFwdRef(Record[1],CurTy),
2364 ValueList.getConstantFwdRef(Record[2],CurTy));
2367 case bitc::CST_CODE_CE_EXTRACTELT
2368 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
2369 if (Record.size() < 3)
2370 return Error("Invalid record");
2372 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2374 return Error("Invalid record");
2375 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2376 Constant *Op1 = nullptr;
2377 if (Record.size() == 4) {
2378 Type *IdxTy = getTypeByID(Record[2]);
2380 return Error("Invalid record");
2381 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2382 } else // TODO: Remove with llvm 4.0
2383 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2385 return Error("Invalid record");
2386 V = ConstantExpr::getExtractElement(Op0, Op1);
2389 case bitc::CST_CODE_CE_INSERTELT
2390 : { // CE_INSERTELT: [opval, opval, opty, opval]
2391 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2392 if (Record.size() < 3 || !OpTy)
2393 return Error("Invalid record");
2394 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2395 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2396 OpTy->getElementType());
2397 Constant *Op2 = nullptr;
2398 if (Record.size() == 4) {
2399 Type *IdxTy = getTypeByID(Record[2]);
2401 return Error("Invalid record");
2402 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2403 } else // TODO: Remove with llvm 4.0
2404 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2406 return Error("Invalid record");
2407 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2410 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
2411 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2412 if (Record.size() < 3 || !OpTy)
2413 return Error("Invalid record");
2414 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2415 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
2416 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2417 OpTy->getNumElements());
2418 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
2419 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2422 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2423 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2425 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2426 if (Record.size() < 4 || !RTy || !OpTy)
2427 return Error("Invalid record");
2428 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2429 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2430 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2431 RTy->getNumElements());
2432 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
2433 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2436 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2437 if (Record.size() < 4)
2438 return Error("Invalid record");
2439 Type *OpTy = getTypeByID(Record[0]);
2441 return Error("Invalid record");
2442 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2443 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2445 if (OpTy->isFPOrFPVectorTy())
2446 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2448 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2451 // This maintains backward compatibility, pre-asm dialect keywords.
2452 // FIXME: Remove with the 4.0 release.
2453 case bitc::CST_CODE_INLINEASM_OLD: {
2454 if (Record.size() < 2)
2455 return Error("Invalid record");
2456 std::string AsmStr, ConstrStr;
2457 bool HasSideEffects = Record[0] & 1;
2458 bool IsAlignStack = Record[0] >> 1;
2459 unsigned AsmStrSize = Record[1];
2460 if (2+AsmStrSize >= Record.size())
2461 return Error("Invalid record");
2462 unsigned ConstStrSize = Record[2+AsmStrSize];
2463 if (3+AsmStrSize+ConstStrSize > Record.size())
2464 return Error("Invalid record");
2466 for (unsigned i = 0; i != AsmStrSize; ++i)
2467 AsmStr += (char)Record[2+i];
2468 for (unsigned i = 0; i != ConstStrSize; ++i)
2469 ConstrStr += (char)Record[3+AsmStrSize+i];
2470 PointerType *PTy = cast<PointerType>(CurTy);
2471 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2472 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
2475 // This version adds support for the asm dialect keywords (e.g.,
2477 case bitc::CST_CODE_INLINEASM: {
2478 if (Record.size() < 2)
2479 return Error("Invalid record");
2480 std::string AsmStr, ConstrStr;
2481 bool HasSideEffects = Record[0] & 1;
2482 bool IsAlignStack = (Record[0] >> 1) & 1;
2483 unsigned AsmDialect = Record[0] >> 2;
2484 unsigned AsmStrSize = Record[1];
2485 if (2+AsmStrSize >= Record.size())
2486 return Error("Invalid record");
2487 unsigned ConstStrSize = Record[2+AsmStrSize];
2488 if (3+AsmStrSize+ConstStrSize > Record.size())
2489 return Error("Invalid record");
2491 for (unsigned i = 0; i != AsmStrSize; ++i)
2492 AsmStr += (char)Record[2+i];
2493 for (unsigned i = 0; i != ConstStrSize; ++i)
2494 ConstrStr += (char)Record[3+AsmStrSize+i];
2495 PointerType *PTy = cast<PointerType>(CurTy);
2496 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2497 AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
2498 InlineAsm::AsmDialect(AsmDialect));
2501 case bitc::CST_CODE_BLOCKADDRESS:{
2502 if (Record.size() < 3)
2503 return Error("Invalid record");
2504 Type *FnTy = getTypeByID(Record[0]);
2506 return Error("Invalid record");
2508 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2510 return Error("Invalid record");
2512 // Don't let Fn get dematerialized.
2513 BlockAddressesTaken.insert(Fn);
2515 // If the function is already parsed we can insert the block address right
2518 unsigned BBID = Record[2];
2520 // Invalid reference to entry block.
2521 return Error("Invalid ID");
2523 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2524 for (size_t I = 0, E = BBID; I != E; ++I) {
2526 return Error("Invalid ID");
2531 // Otherwise insert a placeholder and remember it so it can be inserted
2532 // when the function is parsed.
2533 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2535 BasicBlockFwdRefQueue.push_back(Fn);
2536 if (FwdBBs.size() < BBID + 1)
2537 FwdBBs.resize(BBID + 1);
2539 FwdBBs[BBID] = BasicBlock::Create(Context);
2542 V = BlockAddress::get(Fn, BB);
2547 ValueList.AssignValue(V, NextCstNo);
2552 std::error_code BitcodeReader::ParseUseLists() {
2553 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2554 return Error("Invalid record");
2556 // Read all the records.
2557 SmallVector<uint64_t, 64> Record;
2559 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2561 switch (Entry.Kind) {
2562 case BitstreamEntry::SubBlock: // Handled for us already.
2563 case BitstreamEntry::Error:
2564 return Error("Malformed block");
2565 case BitstreamEntry::EndBlock:
2566 return std::error_code();
2567 case BitstreamEntry::Record:
2568 // The interesting case.
2572 // Read a use list record.
2575 switch (Stream.readRecord(Entry.ID, Record)) {
2576 default: // Default behavior: unknown type.
2578 case bitc::USELIST_CODE_BB:
2581 case bitc::USELIST_CODE_DEFAULT: {
2582 unsigned RecordLength = Record.size();
2583 if (RecordLength < 3)
2584 // Records should have at least an ID and two indexes.
2585 return Error("Invalid record");
2586 unsigned ID = Record.back();
2591 assert(ID < FunctionBBs.size() && "Basic block not found");
2592 V = FunctionBBs[ID];
2595 unsigned NumUses = 0;
2596 SmallDenseMap<const Use *, unsigned, 16> Order;
2597 for (const Use &U : V->uses()) {
2598 if (++NumUses > Record.size())
2600 Order[&U] = Record[NumUses - 1];
2602 if (Order.size() != Record.size() || NumUses > Record.size())
2603 // Mismatches can happen if the functions are being materialized lazily
2604 // (out-of-order), or a value has been upgraded.
2607 V->sortUseList([&](const Use &L, const Use &R) {
2608 return Order.lookup(&L) < Order.lookup(&R);
2616 /// When we see the block for metadata, remember where it is and then skip it.
2617 /// This lets us lazily deserialize the metadata.
2618 std::error_code BitcodeReader::rememberAndSkipMetadata() {
2619 // Save the current stream state.
2620 uint64_t CurBit = Stream.GetCurrentBitNo();
2621 DeferredMetadataInfo.push_back(CurBit);
2623 // Skip over the block for now.
2624 if (Stream.SkipBlock())
2625 return Error("Invalid record");
2626 return std::error_code();
2629 std::error_code BitcodeReader::materializeMetadata() {
2630 for (uint64_t BitPos : DeferredMetadataInfo) {
2631 // Move the bit stream to the saved position.
2632 Stream.JumpToBit(BitPos);
2633 if (std::error_code EC = ParseMetadata())
2636 DeferredMetadataInfo.clear();
2637 return std::error_code();
2640 void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; }
2642 /// RememberAndSkipFunctionBody - When we see the block for a function body,
2643 /// remember where it is and then skip it. This lets us lazily deserialize the
2645 std::error_code BitcodeReader::RememberAndSkipFunctionBody() {
2646 // Get the function we are talking about.
2647 if (FunctionsWithBodies.empty())
2648 return Error("Insufficient function protos");
2650 Function *Fn = FunctionsWithBodies.back();
2651 FunctionsWithBodies.pop_back();
2653 // Save the current stream state.
2654 uint64_t CurBit = Stream.GetCurrentBitNo();
2655 DeferredFunctionInfo[Fn] = CurBit;
2657 // Skip over the function block for now.
2658 if (Stream.SkipBlock())
2659 return Error("Invalid record");
2660 return std::error_code();
2663 std::error_code BitcodeReader::GlobalCleanup() {
2664 // Patch the initializers for globals and aliases up.
2665 ResolveGlobalAndAliasInits();
2666 if (!GlobalInits.empty() || !AliasInits.empty())
2667 return Error("Malformed global initializer set");
2669 // Look for intrinsic functions which need to be upgraded at some point
2670 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
2673 if (UpgradeIntrinsicFunction(FI, NewFn))
2674 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
2677 // Look for global variables which need to be renamed.
2678 for (Module::global_iterator
2679 GI = TheModule->global_begin(), GE = TheModule->global_end();
2681 GlobalVariable *GV = GI++;
2682 UpgradeGlobalVariable(GV);
2685 // Force deallocation of memory for these vectors to favor the client that
2686 // want lazy deserialization.
2687 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
2688 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
2689 return std::error_code();
2692 std::error_code BitcodeReader::ParseModule(bool Resume,
2693 bool ShouldLazyLoadMetadata) {
2695 Stream.JumpToBit(NextUnreadBit);
2696 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
2697 return Error("Invalid record");
2699 SmallVector<uint64_t, 64> Record;
2700 std::vector<std::string> SectionTable;
2701 std::vector<std::string> GCTable;
2703 // Read all the records for this module.
2705 BitstreamEntry Entry = Stream.advance();
2707 switch (Entry.Kind) {
2708 case BitstreamEntry::Error:
2709 return Error("Malformed block");
2710 case BitstreamEntry::EndBlock:
2711 return GlobalCleanup();
2713 case BitstreamEntry::SubBlock:
2715 default: // Skip unknown content.
2716 if (Stream.SkipBlock())
2717 return Error("Invalid record");
2719 case bitc::BLOCKINFO_BLOCK_ID:
2720 if (Stream.ReadBlockInfoBlock())
2721 return Error("Malformed block");
2723 case bitc::PARAMATTR_BLOCK_ID:
2724 if (std::error_code EC = ParseAttributeBlock())
2727 case bitc::PARAMATTR_GROUP_BLOCK_ID:
2728 if (std::error_code EC = ParseAttributeGroupBlock())
2731 case bitc::TYPE_BLOCK_ID_NEW:
2732 if (std::error_code EC = ParseTypeTable())
2735 case bitc::VALUE_SYMTAB_BLOCK_ID:
2736 if (std::error_code EC = ParseValueSymbolTable())
2738 SeenValueSymbolTable = true;
2740 case bitc::CONSTANTS_BLOCK_ID:
2741 if (std::error_code EC = ParseConstants())
2743 if (std::error_code EC = ResolveGlobalAndAliasInits())
2746 case bitc::METADATA_BLOCK_ID:
2747 if (ShouldLazyLoadMetadata && !IsMetadataMaterialized) {
2748 if (std::error_code EC = rememberAndSkipMetadata())
2752 assert(DeferredMetadataInfo.empty() && "Unexpected deferred metadata");
2753 if (std::error_code EC = ParseMetadata())
2756 case bitc::FUNCTION_BLOCK_ID:
2757 // If this is the first function body we've seen, reverse the
2758 // FunctionsWithBodies list.
2759 if (!SeenFirstFunctionBody) {
2760 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
2761 if (std::error_code EC = GlobalCleanup())
2763 SeenFirstFunctionBody = true;
2766 if (std::error_code EC = RememberAndSkipFunctionBody())
2768 // For streaming bitcode, suspend parsing when we reach the function
2769 // bodies. Subsequent materialization calls will resume it when
2770 // necessary. For streaming, the function bodies must be at the end of
2771 // the bitcode. If the bitcode file is old, the symbol table will be
2772 // at the end instead and will not have been seen yet. In this case,
2773 // just finish the parse now.
2774 if (LazyStreamer && SeenValueSymbolTable) {
2775 NextUnreadBit = Stream.GetCurrentBitNo();
2776 return std::error_code();
2779 case bitc::USELIST_BLOCK_ID:
2780 if (std::error_code EC = ParseUseLists())
2786 case BitstreamEntry::Record:
2787 // The interesting case.
2793 switch (Stream.readRecord(Entry.ID, Record)) {
2794 default: break; // Default behavior, ignore unknown content.
2795 case bitc::MODULE_CODE_VERSION: { // VERSION: [version#]
2796 if (Record.size() < 1)
2797 return Error("Invalid record");
2798 // Only version #0 and #1 are supported so far.
2799 unsigned module_version = Record[0];
2800 switch (module_version) {
2802 return Error("Invalid value");
2804 UseRelativeIDs = false;
2807 UseRelativeIDs = true;
2812 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
2814 if (ConvertToString(Record, 0, S))
2815 return Error("Invalid record");
2816 TheModule->setTargetTriple(S);
2819 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
2821 if (ConvertToString(Record, 0, S))
2822 return Error("Invalid record");
2823 TheModule->setDataLayout(S);
2826 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
2828 if (ConvertToString(Record, 0, S))
2829 return Error("Invalid record");
2830 TheModule->setModuleInlineAsm(S);
2833 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
2834 // FIXME: Remove in 4.0.
2836 if (ConvertToString(Record, 0, S))
2837 return Error("Invalid record");
2841 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
2843 if (ConvertToString(Record, 0, S))
2844 return Error("Invalid record");
2845 SectionTable.push_back(S);
2848 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
2850 if (ConvertToString(Record, 0, S))
2851 return Error("Invalid record");
2852 GCTable.push_back(S);
2855 case bitc::MODULE_CODE_COMDAT: { // COMDAT: [selection_kind, name]
2856 if (Record.size() < 2)
2857 return Error("Invalid record");
2858 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
2859 unsigned ComdatNameSize = Record[1];
2860 std::string ComdatName;
2861 ComdatName.reserve(ComdatNameSize);
2862 for (unsigned i = 0; i != ComdatNameSize; ++i)
2863 ComdatName += (char)Record[2 + i];
2864 Comdat *C = TheModule->getOrInsertComdat(ComdatName);
2865 C->setSelectionKind(SK);
2866 ComdatList.push_back(C);
2869 // GLOBALVAR: [pointer type, isconst, initid,
2870 // linkage, alignment, section, visibility, threadlocal,
2871 // unnamed_addr, externally_initialized, dllstorageclass,
2873 case bitc::MODULE_CODE_GLOBALVAR: {
2874 if (Record.size() < 6)
2875 return Error("Invalid record");
2876 Type *Ty = getTypeByID(Record[0]);
2878 return Error("Invalid record");
2879 if (!Ty->isPointerTy())
2880 return Error("Invalid type for value");
2881 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
2882 Ty = cast<PointerType>(Ty)->getElementType();
2884 bool isConstant = Record[1];
2885 uint64_t RawLinkage = Record[3];
2886 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
2888 if (std::error_code EC = parseAlignmentValue(Record[4], Alignment))
2890 std::string Section;
2892 if (Record[5]-1 >= SectionTable.size())
2893 return Error("Invalid ID");
2894 Section = SectionTable[Record[5]-1];
2896 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
2897 // Local linkage must have default visibility.
2898 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
2899 // FIXME: Change to an error if non-default in 4.0.
2900 Visibility = GetDecodedVisibility(Record[6]);
2902 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
2903 if (Record.size() > 7)
2904 TLM = GetDecodedThreadLocalMode(Record[7]);
2906 bool UnnamedAddr = false;
2907 if (Record.size() > 8)
2908 UnnamedAddr = Record[8];
2910 bool ExternallyInitialized = false;
2911 if (Record.size() > 9)
2912 ExternallyInitialized = Record[9];
2914 GlobalVariable *NewGV =
2915 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, "", nullptr,
2916 TLM, AddressSpace, ExternallyInitialized);
2917 NewGV->setAlignment(Alignment);
2918 if (!Section.empty())
2919 NewGV->setSection(Section);
2920 NewGV->setVisibility(Visibility);
2921 NewGV->setUnnamedAddr(UnnamedAddr);
2923 if (Record.size() > 10)
2924 NewGV->setDLLStorageClass(GetDecodedDLLStorageClass(Record[10]));
2926 UpgradeDLLImportExportLinkage(NewGV, RawLinkage);
2928 ValueList.push_back(NewGV);
2930 // Remember which value to use for the global initializer.
2931 if (unsigned InitID = Record[2])
2932 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
2934 if (Record.size() > 11) {
2935 if (unsigned ComdatID = Record[11]) {
2936 assert(ComdatID <= ComdatList.size());
2937 NewGV->setComdat(ComdatList[ComdatID - 1]);
2939 } else if (hasImplicitComdat(RawLinkage)) {
2940 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
2944 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
2945 // alignment, section, visibility, gc, unnamed_addr,
2946 // prologuedata, dllstorageclass, comdat, prefixdata]
2947 case bitc::MODULE_CODE_FUNCTION: {
2948 if (Record.size() < 8)
2949 return Error("Invalid record");
2950 Type *Ty = getTypeByID(Record[0]);
2952 return Error("Invalid record");
2953 if (auto *PTy = dyn_cast<PointerType>(Ty))
2954 Ty = PTy->getElementType();
2955 auto *FTy = dyn_cast<FunctionType>(Ty);
2957 return Error("Invalid type for value");
2959 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
2962 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
2963 bool isProto = Record[2];
2964 uint64_t RawLinkage = Record[3];
2965 Func->setLinkage(getDecodedLinkage(RawLinkage));
2966 Func->setAttributes(getAttributes(Record[4]));
2969 if (std::error_code EC = parseAlignmentValue(Record[5], Alignment))
2971 Func->setAlignment(Alignment);
2973 if (Record[6]-1 >= SectionTable.size())
2974 return Error("Invalid ID");
2975 Func->setSection(SectionTable[Record[6]-1]);
2977 // Local linkage must have default visibility.
2978 if (!Func->hasLocalLinkage())
2979 // FIXME: Change to an error if non-default in 4.0.
2980 Func->setVisibility(GetDecodedVisibility(Record[7]));
2981 if (Record.size() > 8 && Record[8]) {
2982 if (Record[8]-1 > GCTable.size())
2983 return Error("Invalid ID");
2984 Func->setGC(GCTable[Record[8]-1].c_str());
2986 bool UnnamedAddr = false;
2987 if (Record.size() > 9)
2988 UnnamedAddr = Record[9];
2989 Func->setUnnamedAddr(UnnamedAddr);
2990 if (Record.size() > 10 && Record[10] != 0)
2991 FunctionPrologues.push_back(std::make_pair(Func, Record[10]-1));
2993 if (Record.size() > 11)
2994 Func->setDLLStorageClass(GetDecodedDLLStorageClass(Record[11]));
2996 UpgradeDLLImportExportLinkage(Func, RawLinkage);
2998 if (Record.size() > 12) {
2999 if (unsigned ComdatID = Record[12]) {
3000 assert(ComdatID <= ComdatList.size());
3001 Func->setComdat(ComdatList[ComdatID - 1]);
3003 } else if (hasImplicitComdat(RawLinkage)) {
3004 Func->setComdat(reinterpret_cast<Comdat *>(1));
3007 if (Record.size() > 13 && Record[13] != 0)
3008 FunctionPrefixes.push_back(std::make_pair(Func, Record[13]-1));
3010 ValueList.push_back(Func);
3012 // If this is a function with a body, remember the prototype we are
3013 // creating now, so that we can match up the body with them later.
3015 Func->setIsMaterializable(true);
3016 FunctionsWithBodies.push_back(Func);
3018 DeferredFunctionInfo[Func] = 0;
3022 // ALIAS: [alias type, aliasee val#, linkage]
3023 // ALIAS: [alias type, aliasee val#, linkage, visibility, dllstorageclass]
3024 case bitc::MODULE_CODE_ALIAS: {
3025 if (Record.size() < 3)
3026 return Error("Invalid record");
3027 Type *Ty = getTypeByID(Record[0]);
3029 return Error("Invalid record");
3030 auto *PTy = dyn_cast<PointerType>(Ty);
3032 return Error("Invalid type for value");
3035 GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
3036 getDecodedLinkage(Record[2]), "", TheModule);
3037 // Old bitcode files didn't have visibility field.
3038 // Local linkage must have default visibility.
3039 if (Record.size() > 3 && !NewGA->hasLocalLinkage())
3040 // FIXME: Change to an error if non-default in 4.0.
3041 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
3042 if (Record.size() > 4)
3043 NewGA->setDLLStorageClass(GetDecodedDLLStorageClass(Record[4]));
3045 UpgradeDLLImportExportLinkage(NewGA, Record[2]);
3046 if (Record.size() > 5)
3047 NewGA->setThreadLocalMode(GetDecodedThreadLocalMode(Record[5]));
3048 if (Record.size() > 6)
3049 NewGA->setUnnamedAddr(Record[6]);
3050 ValueList.push_back(NewGA);
3051 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
3054 /// MODULE_CODE_PURGEVALS: [numvals]
3055 case bitc::MODULE_CODE_PURGEVALS:
3056 // Trim down the value list to the specified size.
3057 if (Record.size() < 1 || Record[0] > ValueList.size())
3058 return Error("Invalid record");
3059 ValueList.shrinkTo(Record[0]);
3066 std::error_code BitcodeReader::ParseBitcodeInto(Module *M,
3067 bool ShouldLazyLoadMetadata) {
3068 TheModule = nullptr;
3070 if (std::error_code EC = InitStream())
3073 // Sniff for the signature.
3074 if (Stream.Read(8) != 'B' ||
3075 Stream.Read(8) != 'C' ||
3076 Stream.Read(4) != 0x0 ||
3077 Stream.Read(4) != 0xC ||
3078 Stream.Read(4) != 0xE ||
3079 Stream.Read(4) != 0xD)
3080 return Error("Invalid bitcode signature");
3082 // We expect a number of well-defined blocks, though we don't necessarily
3083 // need to understand them all.
3085 if (Stream.AtEndOfStream()) {
3087 return std::error_code();
3088 // We didn't really read a proper Module.
3089 return Error("Malformed IR file");
3092 BitstreamEntry Entry =
3093 Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
3095 switch (Entry.Kind) {
3096 case BitstreamEntry::Error:
3097 return Error("Malformed block");
3098 case BitstreamEntry::EndBlock:
3099 return std::error_code();
3101 case BitstreamEntry::SubBlock:
3103 case bitc::BLOCKINFO_BLOCK_ID:
3104 if (Stream.ReadBlockInfoBlock())
3105 return Error("Malformed block");
3107 case bitc::MODULE_BLOCK_ID:
3108 // Reject multiple MODULE_BLOCK's in a single bitstream.
3110 return Error("Invalid multiple blocks");
3112 if (std::error_code EC = ParseModule(false, ShouldLazyLoadMetadata))
3115 return std::error_code();
3118 if (Stream.SkipBlock())
3119 return Error("Invalid record");
3123 case BitstreamEntry::Record:
3124 // There should be no records in the top-level of blocks.
3126 // The ranlib in Xcode 4 will align archive members by appending newlines
3127 // to the end of them. If this file size is a multiple of 4 but not 8, we
3128 // have to read and ignore these final 4 bytes :-(
3129 if (Stream.getAbbrevIDWidth() == 2 && Entry.ID == 2 &&
3130 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
3131 Stream.AtEndOfStream())
3132 return std::error_code();
3134 return Error("Invalid record");
3139 ErrorOr<std::string> BitcodeReader::parseModuleTriple() {
3140 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
3141 return Error("Invalid record");
3143 SmallVector<uint64_t, 64> Record;
3146 // Read all the records for this module.
3148 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
3150 switch (Entry.Kind) {
3151 case BitstreamEntry::SubBlock: // Handled for us already.
3152 case BitstreamEntry::Error:
3153 return Error("Malformed block");
3154 case BitstreamEntry::EndBlock:
3156 case BitstreamEntry::Record:
3157 // The interesting case.
3162 switch (Stream.readRecord(Entry.ID, Record)) {
3163 default: break; // Default behavior, ignore unknown content.
3164 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
3166 if (ConvertToString(Record, 0, S))
3167 return Error("Invalid record");
3174 llvm_unreachable("Exit infinite loop");
3177 ErrorOr<std::string> BitcodeReader::parseTriple() {
3178 if (std::error_code EC = InitStream())
3181 // Sniff for the signature.
3182 if (Stream.Read(8) != 'B' ||
3183 Stream.Read(8) != 'C' ||
3184 Stream.Read(4) != 0x0 ||
3185 Stream.Read(4) != 0xC ||
3186 Stream.Read(4) != 0xE ||
3187 Stream.Read(4) != 0xD)
3188 return Error("Invalid bitcode signature");
3190 // We expect a number of well-defined blocks, though we don't necessarily
3191 // need to understand them all.
3193 BitstreamEntry Entry = Stream.advance();
3195 switch (Entry.Kind) {
3196 case BitstreamEntry::Error:
3197 return Error("Malformed block");
3198 case BitstreamEntry::EndBlock:
3199 return std::error_code();
3201 case BitstreamEntry::SubBlock:
3202 if (Entry.ID == bitc::MODULE_BLOCK_ID)
3203 return parseModuleTriple();
3205 // Ignore other sub-blocks.
3206 if (Stream.SkipBlock())
3207 return Error("Malformed block");
3210 case BitstreamEntry::Record:
3211 Stream.skipRecord(Entry.ID);
3217 /// ParseMetadataAttachment - Parse metadata attachments.
3218 std::error_code BitcodeReader::ParseMetadataAttachment() {
3219 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
3220 return Error("Invalid record");
3222 SmallVector<uint64_t, 64> Record;
3224 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
3226 switch (Entry.Kind) {
3227 case BitstreamEntry::SubBlock: // Handled for us already.
3228 case BitstreamEntry::Error:
3229 return Error("Malformed block");
3230 case BitstreamEntry::EndBlock:
3231 return std::error_code();
3232 case BitstreamEntry::Record:
3233 // The interesting case.
3237 // Read a metadata attachment record.
3239 switch (Stream.readRecord(Entry.ID, Record)) {
3240 default: // Default behavior: ignore.
3242 case bitc::METADATA_ATTACHMENT: {
3243 unsigned RecordLength = Record.size();
3244 if (Record.empty() || (RecordLength - 1) % 2 == 1)
3245 return Error("Invalid record");
3246 Instruction *Inst = InstructionList[Record[0]];
3247 for (unsigned i = 1; i != RecordLength; i = i+2) {
3248 unsigned Kind = Record[i];
3249 DenseMap<unsigned, unsigned>::iterator I =
3250 MDKindMap.find(Kind);
3251 if (I == MDKindMap.end())
3252 return Error("Invalid ID");
3253 Metadata *Node = MDValueList.getValueFwdRef(Record[i + 1]);
3254 if (isa<LocalAsMetadata>(Node))
3255 // Drop the attachment. This used to be legal, but there's no
3258 Inst->setMetadata(I->second, cast<MDNode>(Node));
3259 if (I->second == LLVMContext::MD_tbaa)
3260 InstsWithTBAATag.push_back(Inst);
3268 /// ParseFunctionBody - Lazily parse the specified function body block.
3269 std::error_code BitcodeReader::ParseFunctionBody(Function *F) {
3270 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
3271 return Error("Invalid record");
3273 InstructionList.clear();
3274 unsigned ModuleValueListSize = ValueList.size();
3275 unsigned ModuleMDValueListSize = MDValueList.size();
3277 // Add all the function arguments to the value table.
3278 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
3279 ValueList.push_back(I);
3281 unsigned NextValueNo = ValueList.size();
3282 BasicBlock *CurBB = nullptr;
3283 unsigned CurBBNo = 0;
3286 auto getLastInstruction = [&]() -> Instruction * {
3287 if (CurBB && !CurBB->empty())
3288 return &CurBB->back();
3289 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
3290 !FunctionBBs[CurBBNo - 1]->empty())
3291 return &FunctionBBs[CurBBNo - 1]->back();
3295 // Read all the records.
3296 SmallVector<uint64_t, 64> Record;
3298 BitstreamEntry Entry = Stream.advance();
3300 switch (Entry.Kind) {
3301 case BitstreamEntry::Error:
3302 return Error("Malformed block");
3303 case BitstreamEntry::EndBlock:
3304 goto OutOfRecordLoop;
3306 case BitstreamEntry::SubBlock:
3308 default: // Skip unknown content.
3309 if (Stream.SkipBlock())
3310 return Error("Invalid record");
3312 case bitc::CONSTANTS_BLOCK_ID:
3313 if (std::error_code EC = ParseConstants())
3315 NextValueNo = ValueList.size();
3317 case bitc::VALUE_SYMTAB_BLOCK_ID:
3318 if (std::error_code EC = ParseValueSymbolTable())
3321 case bitc::METADATA_ATTACHMENT_ID:
3322 if (std::error_code EC = ParseMetadataAttachment())
3325 case bitc::METADATA_BLOCK_ID:
3326 if (std::error_code EC = ParseMetadata())
3329 case bitc::USELIST_BLOCK_ID:
3330 if (std::error_code EC = ParseUseLists())
3336 case BitstreamEntry::Record:
3337 // The interesting case.
3343 Instruction *I = nullptr;
3344 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
3346 default: // Default behavior: reject
3347 return Error("Invalid value");
3348 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
3349 if (Record.size() < 1 || Record[0] == 0)
3350 return Error("Invalid record");
3351 // Create all the basic blocks for the function.
3352 FunctionBBs.resize(Record[0]);
3354 // See if anything took the address of blocks in this function.
3355 auto BBFRI = BasicBlockFwdRefs.find(F);
3356 if (BBFRI == BasicBlockFwdRefs.end()) {
3357 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
3358 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
3360 auto &BBRefs = BBFRI->second;
3361 // Check for invalid basic block references.
3362 if (BBRefs.size() > FunctionBBs.size())
3363 return Error("Invalid ID");
3364 assert(!BBRefs.empty() && "Unexpected empty array");
3365 assert(!BBRefs.front() && "Invalid reference to entry block");
3366 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
3368 if (I < RE && BBRefs[I]) {
3369 BBRefs[I]->insertInto(F);
3370 FunctionBBs[I] = BBRefs[I];
3372 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3375 // Erase from the table.
3376 BasicBlockFwdRefs.erase(BBFRI);
3379 CurBB = FunctionBBs[0];
3383 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3384 // This record indicates that the last instruction is at the same
3385 // location as the previous instruction with a location.
3386 I = getLastInstruction();
3389 return Error("Invalid record");
3390 I->setDebugLoc(LastLoc);
3394 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3395 I = getLastInstruction();
3396 if (!I || Record.size() < 4)
3397 return Error("Invalid record");
3399 unsigned Line = Record[0], Col = Record[1];
3400 unsigned ScopeID = Record[2], IAID = Record[3];
3402 MDNode *Scope = nullptr, *IA = nullptr;
3403 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
3404 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
3405 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
3406 I->setDebugLoc(LastLoc);
3411 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
3414 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3415 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3416 OpNum+1 > Record.size())
3417 return Error("Invalid record");
3419 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
3421 return Error("Invalid record");
3422 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3423 InstructionList.push_back(I);
3424 if (OpNum < Record.size()) {
3425 if (Opc == Instruction::Add ||
3426 Opc == Instruction::Sub ||
3427 Opc == Instruction::Mul ||
3428 Opc == Instruction::Shl) {
3429 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
3430 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
3431 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
3432 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
3433 } else if (Opc == Instruction::SDiv ||
3434 Opc == Instruction::UDiv ||
3435 Opc == Instruction::LShr ||
3436 Opc == Instruction::AShr) {
3437 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
3438 cast<BinaryOperator>(I)->setIsExact(true);
3439 } else if (isa<FPMathOperator>(I)) {
3441 if (0 != (Record[OpNum] & FastMathFlags::UnsafeAlgebra))
3442 FMF.setUnsafeAlgebra();
3443 if (0 != (Record[OpNum] & FastMathFlags::NoNaNs))
3445 if (0 != (Record[OpNum] & FastMathFlags::NoInfs))
3447 if (0 != (Record[OpNum] & FastMathFlags::NoSignedZeros))
3448 FMF.setNoSignedZeros();
3449 if (0 != (Record[OpNum] & FastMathFlags::AllowReciprocal))
3450 FMF.setAllowReciprocal();
3452 I->setFastMathFlags(FMF);
3458 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
3461 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3462 OpNum+2 != Record.size())
3463 return Error("Invalid record");
3465 Type *ResTy = getTypeByID(Record[OpNum]);
3466 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
3467 if (Opc == -1 || !ResTy)
3468 return Error("Invalid record");
3469 Instruction *Temp = nullptr;
3470 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
3472 InstructionList.push_back(Temp);
3473 CurBB->getInstList().push_back(Temp);
3476 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
3478 InstructionList.push_back(I);
3481 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
3482 case bitc::FUNC_CODE_INST_GEP_OLD:
3483 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
3489 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
3490 InBounds = Record[OpNum++];
3491 Ty = getTypeByID(Record[OpNum++]);
3493 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
3498 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
3499 return Error("Invalid record");
3503 cast<SequentialType>(BasePtr->getType()->getScalarType())
3506 "Explicit gep type does not match pointee type of pointer operand");
3508 SmallVector<Value*, 16> GEPIdx;
3509 while (OpNum != Record.size()) {
3511 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3512 return Error("Invalid record");
3513 GEPIdx.push_back(Op);
3516 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
3518 InstructionList.push_back(I);
3520 cast<GetElementPtrInst>(I)->setIsInBounds(true);
3524 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
3525 // EXTRACTVAL: [opty, opval, n x indices]
3528 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3529 return Error("Invalid record");
3531 SmallVector<unsigned, 4> EXTRACTVALIdx;
3532 Type *CurTy = Agg->getType();
3533 for (unsigned RecSize = Record.size();
3534 OpNum != RecSize; ++OpNum) {
3535 bool IsArray = CurTy->isArrayTy();
3536 bool IsStruct = CurTy->isStructTy();
3537 uint64_t Index = Record[OpNum];
3539 if (!IsStruct && !IsArray)
3540 return Error("EXTRACTVAL: Invalid type");
3541 if ((unsigned)Index != Index)
3542 return Error("Invalid value");
3543 if (IsStruct && Index >= CurTy->subtypes().size())
3544 return Error("EXTRACTVAL: Invalid struct index");
3545 if (IsArray && Index >= CurTy->getArrayNumElements())
3546 return Error("EXTRACTVAL: Invalid array index");
3547 EXTRACTVALIdx.push_back((unsigned)Index);
3550 CurTy = CurTy->subtypes()[Index];
3552 CurTy = CurTy->subtypes()[0];
3555 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
3556 InstructionList.push_back(I);
3560 case bitc::FUNC_CODE_INST_INSERTVAL: {
3561 // INSERTVAL: [opty, opval, opty, opval, n x indices]
3564 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3565 return Error("Invalid record");
3567 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
3568 return Error("Invalid record");
3570 SmallVector<unsigned, 4> INSERTVALIdx;
3571 Type *CurTy = Agg->getType();
3572 for (unsigned RecSize = Record.size();
3573 OpNum != RecSize; ++OpNum) {
3574 bool IsArray = CurTy->isArrayTy();
3575 bool IsStruct = CurTy->isStructTy();
3576 uint64_t Index = Record[OpNum];
3578 if (!IsStruct && !IsArray)
3579 return Error("INSERTVAL: Invalid type");
3580 if (!CurTy->isStructTy() && !CurTy->isArrayTy())
3581 return Error("Invalid type");
3582 if ((unsigned)Index != Index)
3583 return Error("Invalid value");
3584 if (IsStruct && Index >= CurTy->subtypes().size())
3585 return Error("INSERTVAL: Invalid struct index");
3586 if (IsArray && Index >= CurTy->getArrayNumElements())
3587 return Error("INSERTVAL: Invalid array index");
3589 INSERTVALIdx.push_back((unsigned)Index);
3591 CurTy = CurTy->subtypes()[Index];
3593 CurTy = CurTy->subtypes()[0];
3596 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
3597 InstructionList.push_back(I);
3601 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
3602 // obsolete form of select
3603 // handles select i1 ... in old bitcode
3605 Value *TrueVal, *FalseVal, *Cond;
3606 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3607 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3608 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
3609 return Error("Invalid record");
3611 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3612 InstructionList.push_back(I);
3616 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
3617 // new form of select
3618 // handles select i1 or select [N x i1]
3620 Value *TrueVal, *FalseVal, *Cond;
3621 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3622 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3623 getValueTypePair(Record, OpNum, NextValueNo, Cond))
3624 return Error("Invalid record");
3626 // select condition can be either i1 or [N x i1]
3627 if (VectorType* vector_type =
3628 dyn_cast<VectorType>(Cond->getType())) {
3630 if (vector_type->getElementType() != Type::getInt1Ty(Context))
3631 return Error("Invalid type for value");
3634 if (Cond->getType() != Type::getInt1Ty(Context))
3635 return Error("Invalid type for value");
3638 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3639 InstructionList.push_back(I);
3643 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
3646 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
3647 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3648 return Error("Invalid record");
3649 I = ExtractElementInst::Create(Vec, Idx);
3650 InstructionList.push_back(I);
3654 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
3656 Value *Vec, *Elt, *Idx;
3657 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
3658 popValue(Record, OpNum, NextValueNo,
3659 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
3660 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3661 return Error("Invalid record");
3662 I = InsertElementInst::Create(Vec, Elt, Idx);
3663 InstructionList.push_back(I);
3667 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
3669 Value *Vec1, *Vec2, *Mask;
3670 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
3671 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
3672 return Error("Invalid record");
3674 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
3675 return Error("Invalid record");
3676 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
3677 InstructionList.push_back(I);
3681 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
3682 // Old form of ICmp/FCmp returning bool
3683 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
3684 // both legal on vectors but had different behaviour.
3685 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
3686 // FCmp/ICmp returning bool or vector of bool
3690 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3691 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3692 OpNum+1 != Record.size())
3693 return Error("Invalid record");
3695 if (LHS->getType()->isFPOrFPVectorTy())
3696 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
3698 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
3699 InstructionList.push_back(I);
3703 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
3705 unsigned Size = Record.size();
3707 I = ReturnInst::Create(Context);
3708 InstructionList.push_back(I);
3713 Value *Op = nullptr;
3714 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3715 return Error("Invalid record");
3716 if (OpNum != Record.size())
3717 return Error("Invalid record");
3719 I = ReturnInst::Create(Context, Op);
3720 InstructionList.push_back(I);
3723 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
3724 if (Record.size() != 1 && Record.size() != 3)
3725 return Error("Invalid record");
3726 BasicBlock *TrueDest = getBasicBlock(Record[0]);
3728 return Error("Invalid record");
3730 if (Record.size() == 1) {
3731 I = BranchInst::Create(TrueDest);
3732 InstructionList.push_back(I);
3735 BasicBlock *FalseDest = getBasicBlock(Record[1]);
3736 Value *Cond = getValue(Record, 2, NextValueNo,
3737 Type::getInt1Ty(Context));
3738 if (!FalseDest || !Cond)
3739 return Error("Invalid record");
3740 I = BranchInst::Create(TrueDest, FalseDest, Cond);
3741 InstructionList.push_back(I);
3745 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
3747 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
3748 // "New" SwitchInst format with case ranges. The changes to write this
3749 // format were reverted but we still recognize bitcode that uses it.
3750 // Hopefully someday we will have support for case ranges and can use
3751 // this format again.
3753 Type *OpTy = getTypeByID(Record[1]);
3754 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
3756 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
3757 BasicBlock *Default = getBasicBlock(Record[3]);
3758 if (!OpTy || !Cond || !Default)
3759 return Error("Invalid record");
3761 unsigned NumCases = Record[4];
3763 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3764 InstructionList.push_back(SI);
3766 unsigned CurIdx = 5;
3767 for (unsigned i = 0; i != NumCases; ++i) {
3768 SmallVector<ConstantInt*, 1> CaseVals;
3769 unsigned NumItems = Record[CurIdx++];
3770 for (unsigned ci = 0; ci != NumItems; ++ci) {
3771 bool isSingleNumber = Record[CurIdx++];
3774 unsigned ActiveWords = 1;
3775 if (ValueBitWidth > 64)
3776 ActiveWords = Record[CurIdx++];
3777 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
3779 CurIdx += ActiveWords;
3781 if (!isSingleNumber) {
3783 if (ValueBitWidth > 64)
3784 ActiveWords = Record[CurIdx++];
3786 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
3788 CurIdx += ActiveWords;
3790 // FIXME: It is not clear whether values in the range should be
3791 // compared as signed or unsigned values. The partially
3792 // implemented changes that used this format in the past used
3793 // unsigned comparisons.
3794 for ( ; Low.ule(High); ++Low)
3795 CaseVals.push_back(ConstantInt::get(Context, Low));
3797 CaseVals.push_back(ConstantInt::get(Context, Low));
3799 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
3800 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
3801 cve = CaseVals.end(); cvi != cve; ++cvi)
3802 SI->addCase(*cvi, DestBB);
3808 // Old SwitchInst format without case ranges.
3810 if (Record.size() < 3 || (Record.size() & 1) == 0)
3811 return Error("Invalid record");
3812 Type *OpTy = getTypeByID(Record[0]);
3813 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
3814 BasicBlock *Default = getBasicBlock(Record[2]);
3815 if (!OpTy || !Cond || !Default)
3816 return Error("Invalid record");
3817 unsigned NumCases = (Record.size()-3)/2;
3818 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3819 InstructionList.push_back(SI);
3820 for (unsigned i = 0, e = NumCases; i != e; ++i) {
3821 ConstantInt *CaseVal =
3822 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
3823 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
3824 if (!CaseVal || !DestBB) {
3826 return Error("Invalid record");
3828 SI->addCase(CaseVal, DestBB);
3833 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
3834 if (Record.size() < 2)
3835 return Error("Invalid record");
3836 Type *OpTy = getTypeByID(Record[0]);
3837 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
3838 if (!OpTy || !Address)
3839 return Error("Invalid record");
3840 unsigned NumDests = Record.size()-2;
3841 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
3842 InstructionList.push_back(IBI);
3843 for (unsigned i = 0, e = NumDests; i != e; ++i) {
3844 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
3845 IBI->addDestination(DestBB);
3848 return Error("Invalid record");
3855 case bitc::FUNC_CODE_INST_INVOKE: {
3856 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
3857 if (Record.size() < 4)
3858 return Error("Invalid record");
3859 AttributeSet PAL = getAttributes(Record[0]);
3860 unsigned CCInfo = Record[1];
3861 BasicBlock *NormalBB = getBasicBlock(Record[2]);
3862 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
3866 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
3867 return Error("Invalid record");
3869 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
3870 FunctionType *FTy = !CalleeTy ? nullptr :
3871 dyn_cast<FunctionType>(CalleeTy->getElementType());
3873 // Check that the right number of fixed parameters are here.
3874 if (!FTy || !NormalBB || !UnwindBB ||
3875 Record.size() < OpNum+FTy->getNumParams())
3876 return Error("Invalid record");
3878 SmallVector<Value*, 16> Ops;
3879 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
3880 Ops.push_back(getValue(Record, OpNum, NextValueNo,
3881 FTy->getParamType(i)));
3883 return Error("Invalid record");
3886 if (!FTy->isVarArg()) {
3887 if (Record.size() != OpNum)
3888 return Error("Invalid record");
3890 // Read type/value pairs for varargs params.
3891 while (OpNum != Record.size()) {
3893 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3894 return Error("Invalid record");
3899 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
3900 InstructionList.push_back(I);
3901 cast<InvokeInst>(I)->setCallingConv(
3902 static_cast<CallingConv::ID>(CCInfo));
3903 cast<InvokeInst>(I)->setAttributes(PAL);
3906 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
3908 Value *Val = nullptr;
3909 if (getValueTypePair(Record, Idx, NextValueNo, Val))
3910 return Error("Invalid record");
3911 I = ResumeInst::Create(Val);
3912 InstructionList.push_back(I);
3915 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
3916 I = new UnreachableInst(Context);
3917 InstructionList.push_back(I);
3919 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
3920 if (Record.size() < 1 || ((Record.size()-1)&1))
3921 return Error("Invalid record");
3922 Type *Ty = getTypeByID(Record[0]);
3924 return Error("Invalid record");
3926 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
3927 InstructionList.push_back(PN);
3929 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
3931 // With the new function encoding, it is possible that operands have
3932 // negative IDs (for forward references). Use a signed VBR
3933 // representation to keep the encoding small.
3935 V = getValueSigned(Record, 1+i, NextValueNo, Ty);
3937 V = getValue(Record, 1+i, NextValueNo, Ty);
3938 BasicBlock *BB = getBasicBlock(Record[2+i]);
3940 return Error("Invalid record");
3941 PN->addIncoming(V, BB);
3947 case bitc::FUNC_CODE_INST_LANDINGPAD: {
3948 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
3950 if (Record.size() < 4)
3951 return Error("Invalid record");
3952 Type *Ty = getTypeByID(Record[Idx++]);
3954 return Error("Invalid record");
3955 Value *PersFn = nullptr;
3956 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
3957 return Error("Invalid record");
3959 bool IsCleanup = !!Record[Idx++];
3960 unsigned NumClauses = Record[Idx++];
3961 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
3962 LP->setCleanup(IsCleanup);
3963 for (unsigned J = 0; J != NumClauses; ++J) {
3964 LandingPadInst::ClauseType CT =
3965 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
3968 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
3970 return Error("Invalid record");
3973 assert((CT != LandingPadInst::Catch ||
3974 !isa<ArrayType>(Val->getType())) &&
3975 "Catch clause has a invalid type!");
3976 assert((CT != LandingPadInst::Filter ||
3977 isa<ArrayType>(Val->getType())) &&
3978 "Filter clause has invalid type!");
3979 LP->addClause(cast<Constant>(Val));
3983 InstructionList.push_back(I);
3987 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
3988 if (Record.size() != 4)
3989 return Error("Invalid record");
3991 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
3992 Type *OpTy = getTypeByID(Record[1]);
3993 Value *Size = getFnValueByID(Record[2], OpTy);
3994 uint64_t AlignRecord = Record[3];
3995 const uint64_t InAllocaMask = uint64_t(1) << 5;
3996 bool InAlloca = AlignRecord & InAllocaMask;
3998 if (std::error_code EC =
3999 parseAlignmentValue(AlignRecord & ~InAllocaMask, Align)) {
4003 return Error("Invalid record");
4004 AllocaInst *AI = new AllocaInst(Ty->getElementType(), Size, Align);
4005 AI->setUsedWithInAlloca(InAlloca);
4007 InstructionList.push_back(I);
4010 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
4013 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
4014 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
4015 return Error("Invalid record");
4018 if (OpNum + 3 == Record.size())
4019 Ty = getTypeByID(Record[OpNum++]);
4021 Ty = cast<PointerType>(Op->getType())->getElementType();
4022 else if (Ty != cast<PointerType>(Op->getType())->getElementType())
4023 return Error("Explicit load type does not match pointee type of "
4027 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4029 I = new LoadInst(Ty, Op, "", Record[OpNum + 1], Align);
4031 InstructionList.push_back(I);
4034 case bitc::FUNC_CODE_INST_LOADATOMIC: {
4035 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
4038 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
4039 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
4040 return Error("Invalid record");
4043 if (OpNum + 5 == Record.size())
4044 Ty = getTypeByID(Record[OpNum++]);
4046 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
4047 if (Ordering == NotAtomic || Ordering == Release ||
4048 Ordering == AcquireRelease)
4049 return Error("Invalid record");
4050 if (Ordering != NotAtomic && Record[OpNum] == 0)
4051 return Error("Invalid record");
4052 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
4055 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4057 I = new LoadInst(Op, "", Record[OpNum+1], Align, Ordering, SynchScope);
4060 assert((!Ty || Ty == I->getType()) &&
4061 "Explicit type doesn't match pointee type of the first operand");
4063 InstructionList.push_back(I);
4066 case bitc::FUNC_CODE_INST_STORE:
4067 case bitc::FUNC_CODE_INST_STORE_OLD: { // STORE2:[ptrty, ptr, val, align, vol]
4070 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4071 (BitCode == bitc::FUNC_CODE_INST_STORE
4072 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4073 : popValue(Record, OpNum, NextValueNo,
4074 cast<PointerType>(Ptr->getType())->getElementType(),
4076 OpNum + 2 != Record.size())
4077 return Error("Invalid record");
4079 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4081 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align);
4082 InstructionList.push_back(I);
4085 case bitc::FUNC_CODE_INST_STOREATOMIC:
4086 case bitc::FUNC_CODE_INST_STOREATOMIC_OLD: {
4087 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
4090 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4091 (BitCode == bitc::FUNC_CODE_INST_STOREATOMIC
4092 ? getValueTypePair(Record, OpNum, NextValueNo, Val)
4093 : popValue(Record, OpNum, NextValueNo,
4094 cast<PointerType>(Ptr->getType())->getElementType(),
4096 OpNum + 4 != Record.size())
4097 return Error("Invalid record");
4099 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
4100 if (Ordering == NotAtomic || Ordering == Acquire ||
4101 Ordering == AcquireRelease)
4102 return Error("Invalid record");
4103 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
4104 if (Ordering != NotAtomic && Record[OpNum] == 0)
4105 return Error("Invalid record");
4108 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4110 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align, Ordering, SynchScope);
4111 InstructionList.push_back(I);
4114 case bitc::FUNC_CODE_INST_CMPXCHG: {
4115 // CMPXCHG:[ptrty, ptr, cmp, new, vol, successordering, synchscope,
4116 // failureordering?, isweak?]
4118 Value *Ptr, *Cmp, *New;
4119 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4120 popValue(Record, OpNum, NextValueNo,
4121 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
4122 popValue(Record, OpNum, NextValueNo,
4123 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
4124 (Record.size() < OpNum + 3 || Record.size() > OpNum + 5))
4125 return Error("Invalid record");
4126 AtomicOrdering SuccessOrdering = GetDecodedOrdering(Record[OpNum+1]);
4127 if (SuccessOrdering == NotAtomic || SuccessOrdering == Unordered)
4128 return Error("Invalid record");
4129 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
4131 AtomicOrdering FailureOrdering;
4132 if (Record.size() < 7)
4134 AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering);
4136 FailureOrdering = GetDecodedOrdering(Record[OpNum+3]);
4138 I = new AtomicCmpXchgInst(Ptr, Cmp, New, SuccessOrdering, FailureOrdering,
4140 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
4142 if (Record.size() < 8) {
4143 // Before weak cmpxchgs existed, the instruction simply returned the
4144 // value loaded from memory, so bitcode files from that era will be
4145 // expecting the first component of a modern cmpxchg.
4146 CurBB->getInstList().push_back(I);
4147 I = ExtractValueInst::Create(I, 0);
4149 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum+4]);
4152 InstructionList.push_back(I);
4155 case bitc::FUNC_CODE_INST_ATOMICRMW: {
4156 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
4159 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4160 popValue(Record, OpNum, NextValueNo,
4161 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
4162 OpNum+4 != Record.size())
4163 return Error("Invalid record");
4164 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
4165 if (Operation < AtomicRMWInst::FIRST_BINOP ||
4166 Operation > AtomicRMWInst::LAST_BINOP)
4167 return Error("Invalid record");
4168 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
4169 if (Ordering == NotAtomic || Ordering == Unordered)
4170 return Error("Invalid record");
4171 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
4172 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
4173 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
4174 InstructionList.push_back(I);
4177 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
4178 if (2 != Record.size())
4179 return Error("Invalid record");
4180 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
4181 if (Ordering == NotAtomic || Ordering == Unordered ||
4182 Ordering == Monotonic)
4183 return Error("Invalid record");
4184 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
4185 I = new FenceInst(Context, Ordering, SynchScope);
4186 InstructionList.push_back(I);
4189 case bitc::FUNC_CODE_INST_CALL: {
4190 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
4191 if (Record.size() < 3)
4192 return Error("Invalid record");
4195 AttributeSet PAL = getAttributes(Record[OpNum++]);
4196 unsigned CCInfo = Record[OpNum++];
4198 FunctionType *FTy = nullptr;
4199 if (CCInfo >> 15 & 1 &&
4200 !(FTy = dyn_cast<FunctionType>(getTypeByID(Record[OpNum++]))))
4201 return Error("Explicit call type is not a function type");
4204 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
4205 return Error("Invalid record");
4207 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
4209 return Error("Callee is not a pointer type");
4211 FTy = dyn_cast<FunctionType>(OpTy->getElementType());
4213 return Error("Callee is not of pointer to function type");
4214 } else if (OpTy->getElementType() != FTy)
4215 return Error("Explicit call type does not match pointee type of "
4217 if (Record.size() < FTy->getNumParams() + OpNum)
4218 return Error("Insufficient operands to call");
4220 SmallVector<Value*, 16> Args;
4221 // Read the fixed params.
4222 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4223 if (FTy->getParamType(i)->isLabelTy())
4224 Args.push_back(getBasicBlock(Record[OpNum]));
4226 Args.push_back(getValue(Record, OpNum, NextValueNo,
4227 FTy->getParamType(i)));
4229 return Error("Invalid record");
4232 // Read type/value pairs for varargs params.
4233 if (!FTy->isVarArg()) {
4234 if (OpNum != Record.size())
4235 return Error("Invalid record");
4237 while (OpNum != Record.size()) {
4239 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4240 return Error("Invalid record");
4245 I = CallInst::Create(FTy, Callee, Args);
4246 InstructionList.push_back(I);
4247 cast<CallInst>(I)->setCallingConv(
4248 static_cast<CallingConv::ID>((~(1U << 14) & CCInfo) >> 1));
4249 CallInst::TailCallKind TCK = CallInst::TCK_None;
4251 TCK = CallInst::TCK_Tail;
4252 if (CCInfo & (1 << 14))
4253 TCK = CallInst::TCK_MustTail;
4254 cast<CallInst>(I)->setTailCallKind(TCK);
4255 cast<CallInst>(I)->setAttributes(PAL);
4258 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
4259 if (Record.size() < 3)
4260 return Error("Invalid record");
4261 Type *OpTy = getTypeByID(Record[0]);
4262 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
4263 Type *ResTy = getTypeByID(Record[2]);
4264 if (!OpTy || !Op || !ResTy)
4265 return Error("Invalid record");
4266 I = new VAArgInst(Op, ResTy);
4267 InstructionList.push_back(I);
4272 // Add instruction to end of current BB. If there is no current BB, reject
4276 return Error("Invalid instruction with no BB");
4278 CurBB->getInstList().push_back(I);
4280 // If this was a terminator instruction, move to the next block.
4281 if (isa<TerminatorInst>(I)) {
4283 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
4286 // Non-void values get registered in the value table for future use.
4287 if (I && !I->getType()->isVoidTy())
4288 ValueList.AssignValue(I, NextValueNo++);
4293 // Check the function list for unresolved values.
4294 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
4295 if (!A->getParent()) {
4296 // We found at least one unresolved value. Nuke them all to avoid leaks.
4297 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
4298 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
4299 A->replaceAllUsesWith(UndefValue::get(A->getType()));
4303 return Error("Never resolved value found in function");
4307 // FIXME: Check for unresolved forward-declared metadata references
4308 // and clean up leaks.
4310 // Trim the value list down to the size it was before we parsed this function.
4311 ValueList.shrinkTo(ModuleValueListSize);
4312 MDValueList.shrinkTo(ModuleMDValueListSize);
4313 std::vector<BasicBlock*>().swap(FunctionBBs);
4314 return std::error_code();
4317 /// Find the function body in the bitcode stream
4318 std::error_code BitcodeReader::FindFunctionInStream(
4320 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
4321 while (DeferredFunctionInfoIterator->second == 0) {
4322 if (Stream.AtEndOfStream())
4323 return Error("Could not find function in stream");
4324 // ParseModule will parse the next body in the stream and set its
4325 // position in the DeferredFunctionInfo map.
4326 if (std::error_code EC = ParseModule(true))
4329 return std::error_code();
4332 //===----------------------------------------------------------------------===//
4333 // GVMaterializer implementation
4334 //===----------------------------------------------------------------------===//
4336 void BitcodeReader::releaseBuffer() { Buffer.release(); }
4338 std::error_code BitcodeReader::materialize(GlobalValue *GV) {
4339 if (std::error_code EC = materializeMetadata())
4342 Function *F = dyn_cast<Function>(GV);
4343 // If it's not a function or is already material, ignore the request.
4344 if (!F || !F->isMaterializable())
4345 return std::error_code();
4347 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
4348 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
4349 // If its position is recorded as 0, its body is somewhere in the stream
4350 // but we haven't seen it yet.
4351 if (DFII->second == 0 && LazyStreamer)
4352 if (std::error_code EC = FindFunctionInStream(F, DFII))
4355 // Move the bit stream to the saved position of the deferred function body.
4356 Stream.JumpToBit(DFII->second);
4358 if (std::error_code EC = ParseFunctionBody(F))
4360 F->setIsMaterializable(false);
4365 // Upgrade any old intrinsic calls in the function.
4366 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
4367 E = UpgradedIntrinsics.end(); I != E; ++I) {
4368 if (I->first != I->second) {
4369 for (auto UI = I->first->user_begin(), UE = I->first->user_end();
4371 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
4372 UpgradeIntrinsicCall(CI, I->second);
4377 // Bring in any functions that this function forward-referenced via
4379 return materializeForwardReferencedFunctions();
4382 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
4383 const Function *F = dyn_cast<Function>(GV);
4384 if (!F || F->isDeclaration())
4387 // Dematerializing F would leave dangling references that wouldn't be
4388 // reconnected on re-materialization.
4389 if (BlockAddressesTaken.count(F))
4392 return DeferredFunctionInfo.count(const_cast<Function*>(F));
4395 void BitcodeReader::Dematerialize(GlobalValue *GV) {
4396 Function *F = dyn_cast<Function>(GV);
4397 // If this function isn't dematerializable, this is a noop.
4398 if (!F || !isDematerializable(F))
4401 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
4403 // Just forget the function body, we can remat it later.
4404 F->dropAllReferences();
4405 F->setIsMaterializable(true);
4408 std::error_code BitcodeReader::MaterializeModule(Module *M) {
4409 assert(M == TheModule &&
4410 "Can only Materialize the Module this BitcodeReader is attached to.");
4412 if (std::error_code EC = materializeMetadata())
4415 // Promise to materialize all forward references.
4416 WillMaterializeAllForwardRefs = true;
4418 // Iterate over the module, deserializing any functions that are still on
4420 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
4422 if (std::error_code EC = materialize(F))
4425 // At this point, if there are any function bodies, the current bit is
4426 // pointing to the END_BLOCK record after them. Now make sure the rest
4427 // of the bits in the module have been read.
4431 // Check that all block address forward references got resolved (as we
4433 if (!BasicBlockFwdRefs.empty())
4434 return Error("Never resolved function from blockaddress");
4436 // Upgrade any intrinsic calls that slipped through (should not happen!) and
4437 // delete the old functions to clean up. We can't do this unless the entire
4438 // module is materialized because there could always be another function body
4439 // with calls to the old function.
4440 for (std::vector<std::pair<Function*, Function*> >::iterator I =
4441 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
4442 if (I->first != I->second) {
4443 for (auto UI = I->first->user_begin(), UE = I->first->user_end();
4445 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
4446 UpgradeIntrinsicCall(CI, I->second);
4448 if (!I->first->use_empty())
4449 I->first->replaceAllUsesWith(I->second);
4450 I->first->eraseFromParent();
4453 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
4455 for (unsigned I = 0, E = InstsWithTBAATag.size(); I < E; I++)
4456 UpgradeInstWithTBAATag(InstsWithTBAATag[I]);
4458 UpgradeDebugInfo(*M);
4459 return std::error_code();
4462 std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
4463 return IdentifiedStructTypes;
4466 std::error_code BitcodeReader::InitStream() {
4468 return InitLazyStream();
4469 return InitStreamFromBuffer();
4472 std::error_code BitcodeReader::InitStreamFromBuffer() {
4473 const unsigned char *BufPtr = (const unsigned char*)Buffer->getBufferStart();
4474 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
4476 if (Buffer->getBufferSize() & 3)
4477 return Error("Invalid bitcode signature");
4479 // If we have a wrapper header, parse it and ignore the non-bc file contents.
4480 // The magic number is 0x0B17C0DE stored in little endian.
4481 if (isBitcodeWrapper(BufPtr, BufEnd))
4482 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
4483 return Error("Invalid bitcode wrapper header");
4485 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
4486 Stream.init(&*StreamFile);
4488 return std::error_code();
4491 std::error_code BitcodeReader::InitLazyStream() {
4492 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
4494 auto OwnedBytes = llvm::make_unique<StreamingMemoryObject>(LazyStreamer);
4495 StreamingMemoryObject &Bytes = *OwnedBytes;
4496 StreamFile = llvm::make_unique<BitstreamReader>(std::move(OwnedBytes));
4497 Stream.init(&*StreamFile);
4499 unsigned char buf[16];
4500 if (Bytes.readBytes(buf, 16, 0) != 16)
4501 return Error("Invalid bitcode signature");
4503 if (!isBitcode(buf, buf + 16))
4504 return Error("Invalid bitcode signature");
4506 if (isBitcodeWrapper(buf, buf + 4)) {
4507 const unsigned char *bitcodeStart = buf;
4508 const unsigned char *bitcodeEnd = buf + 16;
4509 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
4510 Bytes.dropLeadingBytes(bitcodeStart - buf);
4511 Bytes.setKnownObjectSize(bitcodeEnd - bitcodeStart);
4513 return std::error_code();
4517 class BitcodeErrorCategoryType : public std::error_category {
4518 const char *name() const LLVM_NOEXCEPT override {
4519 return "llvm.bitcode";
4521 std::string message(int IE) const override {
4522 BitcodeError E = static_cast<BitcodeError>(IE);
4524 case BitcodeError::InvalidBitcodeSignature:
4525 return "Invalid bitcode signature";
4526 case BitcodeError::CorruptedBitcode:
4527 return "Corrupted bitcode";
4529 llvm_unreachable("Unknown error type!");
4534 static ManagedStatic<BitcodeErrorCategoryType> ErrorCategory;
4536 const std::error_category &llvm::BitcodeErrorCategory() {
4537 return *ErrorCategory;
4540 //===----------------------------------------------------------------------===//
4541 // External interface
4542 //===----------------------------------------------------------------------===//
4544 /// \brief Get a lazy one-at-time loading module from bitcode.
4546 /// This isn't always used in a lazy context. In particular, it's also used by
4547 /// \a parseBitcodeFile(). If this is truly lazy, then we need to eagerly pull
4548 /// in forward-referenced functions from block address references.
4550 /// \param[in] WillMaterializeAll Set to \c true if the caller promises to
4551 /// materialize everything -- in particular, if this isn't truly lazy.
4552 static ErrorOr<Module *>
4553 getLazyBitcodeModuleImpl(std::unique_ptr<MemoryBuffer> &&Buffer,
4554 LLVMContext &Context, bool WillMaterializeAll,
4555 DiagnosticHandlerFunction DiagnosticHandler,
4556 bool ShouldLazyLoadMetadata = false) {
4557 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
4559 new BitcodeReader(Buffer.get(), Context, DiagnosticHandler);
4560 M->setMaterializer(R);
4562 auto cleanupOnError = [&](std::error_code EC) {
4563 R->releaseBuffer(); // Never take ownership on error.
4564 delete M; // Also deletes R.
4568 // Delay parsing Metadata if ShouldLazyLoadMetadata is true.
4569 if (std::error_code EC = R->ParseBitcodeInto(M, ShouldLazyLoadMetadata))
4570 return cleanupOnError(EC);
4572 if (!WillMaterializeAll)
4573 // Resolve forward references from blockaddresses.
4574 if (std::error_code EC = R->materializeForwardReferencedFunctions())
4575 return cleanupOnError(EC);
4577 Buffer.release(); // The BitcodeReader owns it now.
4582 llvm::getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &&Buffer,
4583 LLVMContext &Context,
4584 DiagnosticHandlerFunction DiagnosticHandler,
4585 bool ShouldLazyLoadMetadata) {
4586 return getLazyBitcodeModuleImpl(std::move(Buffer), Context, false,
4587 DiagnosticHandler, ShouldLazyLoadMetadata);
4590 ErrorOr<std::unique_ptr<Module>>
4591 llvm::getStreamedBitcodeModule(StringRef Name, DataStreamer *Streamer,
4592 LLVMContext &Context,
4593 DiagnosticHandlerFunction DiagnosticHandler) {
4594 std::unique_ptr<Module> M = make_unique<Module>(Name, Context);
4595 BitcodeReader *R = new BitcodeReader(Streamer, Context, DiagnosticHandler);
4596 M->setMaterializer(R);
4597 if (std::error_code EC = R->ParseBitcodeInto(M.get()))
4599 return std::move(M);
4603 llvm::parseBitcodeFile(MemoryBufferRef Buffer, LLVMContext &Context,
4604 DiagnosticHandlerFunction DiagnosticHandler) {
4605 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
4606 ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModuleImpl(
4607 std::move(Buf), Context, true, DiagnosticHandler);
4610 Module *M = ModuleOrErr.get();
4611 // Read in the entire module, and destroy the BitcodeReader.
4612 if (std::error_code EC = M->materializeAllPermanently()) {
4617 // TODO: Restore the use-lists to the in-memory state when the bitcode was
4618 // written. We must defer until the Module has been fully materialized.
4624 llvm::getBitcodeTargetTriple(MemoryBufferRef Buffer, LLVMContext &Context,
4625 DiagnosticHandlerFunction DiagnosticHandler) {
4626 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
4627 auto R = llvm::make_unique<BitcodeReader>(Buf.release(), Context,
4629 ErrorOr<std::string> Triple = R->parseTriple();
4630 if (Triple.getError())
4632 return Triple.get();