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;
302 } else 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;
610 static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
613 case bitc::BINOP_ADD:
614 return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
615 case bitc::BINOP_SUB:
616 return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
617 case bitc::BINOP_MUL:
618 return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
619 case bitc::BINOP_UDIV: return Instruction::UDiv;
620 case bitc::BINOP_SDIV:
621 return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
622 case bitc::BINOP_UREM: return Instruction::URem;
623 case bitc::BINOP_SREM:
624 return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
625 case bitc::BINOP_SHL: return Instruction::Shl;
626 case bitc::BINOP_LSHR: return Instruction::LShr;
627 case bitc::BINOP_ASHR: return Instruction::AShr;
628 case bitc::BINOP_AND: return Instruction::And;
629 case bitc::BINOP_OR: return Instruction::Or;
630 case bitc::BINOP_XOR: return Instruction::Xor;
634 static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
636 default: return AtomicRMWInst::BAD_BINOP;
637 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
638 case bitc::RMW_ADD: return AtomicRMWInst::Add;
639 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
640 case bitc::RMW_AND: return AtomicRMWInst::And;
641 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
642 case bitc::RMW_OR: return AtomicRMWInst::Or;
643 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
644 case bitc::RMW_MAX: return AtomicRMWInst::Max;
645 case bitc::RMW_MIN: return AtomicRMWInst::Min;
646 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
647 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
651 static AtomicOrdering GetDecodedOrdering(unsigned Val) {
653 case bitc::ORDERING_NOTATOMIC: return NotAtomic;
654 case bitc::ORDERING_UNORDERED: return Unordered;
655 case bitc::ORDERING_MONOTONIC: return Monotonic;
656 case bitc::ORDERING_ACQUIRE: return Acquire;
657 case bitc::ORDERING_RELEASE: return Release;
658 case bitc::ORDERING_ACQREL: return AcquireRelease;
659 default: // Map unknown orderings to sequentially-consistent.
660 case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
664 static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
666 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
667 default: // Map unknown scopes to cross-thread.
668 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
672 static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
674 default: // Map unknown selection kinds to any.
675 case bitc::COMDAT_SELECTION_KIND_ANY:
677 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
678 return Comdat::ExactMatch;
679 case bitc::COMDAT_SELECTION_KIND_LARGEST:
680 return Comdat::Largest;
681 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
682 return Comdat::NoDuplicates;
683 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
684 return Comdat::SameSize;
688 static void UpgradeDLLImportExportLinkage(llvm::GlobalValue *GV, unsigned Val) {
690 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
691 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
697 /// @brief A class for maintaining the slot number definition
698 /// as a placeholder for the actual definition for forward constants defs.
699 class ConstantPlaceHolder : public ConstantExpr {
700 void operator=(const ConstantPlaceHolder &) = delete;
702 // allocate space for exactly one operand
703 void *operator new(size_t s) {
704 return User::operator new(s, 1);
706 explicit ConstantPlaceHolder(Type *Ty, LLVMContext& Context)
707 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
708 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
711 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
712 static bool classof(const Value *V) {
713 return isa<ConstantExpr>(V) &&
714 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
718 /// Provide fast operand accessors
719 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
723 // FIXME: can we inherit this from ConstantExpr?
725 struct OperandTraits<ConstantPlaceHolder> :
726 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
728 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantPlaceHolder, Value)
732 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
741 WeakVH &OldV = ValuePtrs[Idx];
747 // Handle constants and non-constants (e.g. instrs) differently for
749 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
750 ResolveConstants.push_back(std::make_pair(PHC, Idx));
753 // If there was a forward reference to this value, replace it.
754 Value *PrevVal = OldV;
755 OldV->replaceAllUsesWith(V);
761 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
766 if (Value *V = ValuePtrs[Idx]) {
767 assert(Ty == V->getType() && "Type mismatch in constant table!");
768 return cast<Constant>(V);
771 // Create and return a placeholder, which will later be RAUW'd.
772 Constant *C = new ConstantPlaceHolder(Ty, Context);
777 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, Type *Ty) {
781 if (Value *V = ValuePtrs[Idx]) {
782 assert((!Ty || Ty == V->getType()) && "Type mismatch in value table!");
786 // No type specified, must be invalid reference.
787 if (!Ty) return nullptr;
789 // Create and return a placeholder, which will later be RAUW'd.
790 Value *V = new Argument(Ty);
795 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
796 /// resolves any forward references. The idea behind this is that we sometimes
797 /// get constants (such as large arrays) which reference *many* forward ref
798 /// constants. Replacing each of these causes a lot of thrashing when
799 /// building/reuniquing the constant. Instead of doing this, we look at all the
800 /// uses and rewrite all the place holders at once for any constant that uses
802 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
803 // Sort the values by-pointer so that they are efficient to look up with a
805 std::sort(ResolveConstants.begin(), ResolveConstants.end());
807 SmallVector<Constant*, 64> NewOps;
809 while (!ResolveConstants.empty()) {
810 Value *RealVal = operator[](ResolveConstants.back().second);
811 Constant *Placeholder = ResolveConstants.back().first;
812 ResolveConstants.pop_back();
814 // Loop over all users of the placeholder, updating them to reference the
815 // new value. If they reference more than one placeholder, update them all
817 while (!Placeholder->use_empty()) {
818 auto UI = Placeholder->user_begin();
821 // If the using object isn't uniqued, just update the operands. This
822 // handles instructions and initializers for global variables.
823 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
824 UI.getUse().set(RealVal);
828 // Otherwise, we have a constant that uses the placeholder. Replace that
829 // constant with a new constant that has *all* placeholder uses updated.
830 Constant *UserC = cast<Constant>(U);
831 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
834 if (!isa<ConstantPlaceHolder>(*I)) {
835 // Not a placeholder reference.
837 } else if (*I == Placeholder) {
838 // Common case is that it just references this one placeholder.
841 // Otherwise, look up the placeholder in ResolveConstants.
842 ResolveConstantsTy::iterator It =
843 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
844 std::pair<Constant*, unsigned>(cast<Constant>(*I),
846 assert(It != ResolveConstants.end() && It->first == *I);
847 NewOp = operator[](It->second);
850 NewOps.push_back(cast<Constant>(NewOp));
853 // Make the new constant.
855 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
856 NewC = ConstantArray::get(UserCA->getType(), NewOps);
857 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
858 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
859 } else if (isa<ConstantVector>(UserC)) {
860 NewC = ConstantVector::get(NewOps);
862 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
863 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
866 UserC->replaceAllUsesWith(NewC);
867 UserC->destroyConstant();
871 // Update all ValueHandles, they should be the only users at this point.
872 Placeholder->replaceAllUsesWith(RealVal);
877 void BitcodeReaderMDValueList::AssignValue(Metadata *MD, unsigned Idx) {
886 TrackingMDRef &OldMD = MDValuePtrs[Idx];
892 // If there was a forward reference to this value, replace it.
893 TempMDTuple PrevMD(cast<MDTuple>(OldMD.get()));
894 PrevMD->replaceAllUsesWith(MD);
898 Metadata *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
902 if (Metadata *MD = MDValuePtrs[Idx])
905 // Track forward refs to be resolved later.
907 MinFwdRef = std::min(MinFwdRef, Idx);
908 MaxFwdRef = std::max(MaxFwdRef, Idx);
911 MinFwdRef = MaxFwdRef = Idx;
915 // Create and return a placeholder, which will later be RAUW'd.
916 Metadata *MD = MDNode::getTemporary(Context, None).release();
917 MDValuePtrs[Idx].reset(MD);
921 void BitcodeReaderMDValueList::tryToResolveCycles() {
927 // Still forward references... can't resolve cycles.
930 // Resolve any cycles.
931 for (unsigned I = MinFwdRef, E = MaxFwdRef + 1; I != E; ++I) {
932 auto &MD = MDValuePtrs[I];
933 auto *N = dyn_cast_or_null<MDNode>(MD);
937 assert(!N->isTemporary() && "Unexpected forward reference");
941 // Make sure we return early again until there's another forward ref.
945 Type *BitcodeReader::getTypeByID(unsigned ID) {
946 // The type table size is always specified correctly.
947 if (ID >= TypeList.size())
950 if (Type *Ty = TypeList[ID])
953 // If we have a forward reference, the only possible case is when it is to a
954 // named struct. Just create a placeholder for now.
955 return TypeList[ID] = createIdentifiedStructType(Context);
958 StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
960 auto *Ret = StructType::create(Context, Name);
961 IdentifiedStructTypes.push_back(Ret);
965 StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
966 auto *Ret = StructType::create(Context);
967 IdentifiedStructTypes.push_back(Ret);
972 //===----------------------------------------------------------------------===//
973 // Functions for parsing blocks from the bitcode file
974 //===----------------------------------------------------------------------===//
977 /// \brief This fills an AttrBuilder object with the LLVM attributes that have
978 /// been decoded from the given integer. This function must stay in sync with
979 /// 'encodeLLVMAttributesForBitcode'.
980 static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
981 uint64_t EncodedAttrs) {
982 // FIXME: Remove in 4.0.
984 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
985 // the bits above 31 down by 11 bits.
986 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
987 assert((!Alignment || isPowerOf2_32(Alignment)) &&
988 "Alignment must be a power of two.");
991 B.addAlignmentAttr(Alignment);
992 B.addRawValue(((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
993 (EncodedAttrs & 0xffff));
996 std::error_code BitcodeReader::ParseAttributeBlock() {
997 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
998 return Error("Invalid record");
1000 if (!MAttributes.empty())
1001 return Error("Invalid multiple blocks");
1003 SmallVector<uint64_t, 64> Record;
1005 SmallVector<AttributeSet, 8> Attrs;
1007 // Read all the records.
1009 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1011 switch (Entry.Kind) {
1012 case BitstreamEntry::SubBlock: // Handled for us already.
1013 case BitstreamEntry::Error:
1014 return Error("Malformed block");
1015 case BitstreamEntry::EndBlock:
1016 return std::error_code();
1017 case BitstreamEntry::Record:
1018 // The interesting case.
1024 switch (Stream.readRecord(Entry.ID, Record)) {
1025 default: // Default behavior: ignore.
1027 case bitc::PARAMATTR_CODE_ENTRY_OLD: { // ENTRY: [paramidx0, attr0, ...]
1028 // FIXME: Remove in 4.0.
1029 if (Record.size() & 1)
1030 return Error("Invalid record");
1032 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1034 decodeLLVMAttributesForBitcode(B, Record[i+1]);
1035 Attrs.push_back(AttributeSet::get(Context, Record[i], B));
1038 MAttributes.push_back(AttributeSet::get(Context, Attrs));
1042 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [attrgrp0, attrgrp1, ...]
1043 for (unsigned i = 0, e = Record.size(); i != e; ++i)
1044 Attrs.push_back(MAttributeGroups[Record[i]]);
1046 MAttributes.push_back(AttributeSet::get(Context, Attrs));
1054 // Returns Attribute::None on unrecognized codes.
1055 static Attribute::AttrKind GetAttrFromCode(uint64_t Code) {
1058 return Attribute::None;
1059 case bitc::ATTR_KIND_ALIGNMENT:
1060 return Attribute::Alignment;
1061 case bitc::ATTR_KIND_ALWAYS_INLINE:
1062 return Attribute::AlwaysInline;
1063 case bitc::ATTR_KIND_BUILTIN:
1064 return Attribute::Builtin;
1065 case bitc::ATTR_KIND_BY_VAL:
1066 return Attribute::ByVal;
1067 case bitc::ATTR_KIND_IN_ALLOCA:
1068 return Attribute::InAlloca;
1069 case bitc::ATTR_KIND_COLD:
1070 return Attribute::Cold;
1071 case bitc::ATTR_KIND_INLINE_HINT:
1072 return Attribute::InlineHint;
1073 case bitc::ATTR_KIND_IN_REG:
1074 return Attribute::InReg;
1075 case bitc::ATTR_KIND_JUMP_TABLE:
1076 return Attribute::JumpTable;
1077 case bitc::ATTR_KIND_MIN_SIZE:
1078 return Attribute::MinSize;
1079 case bitc::ATTR_KIND_NAKED:
1080 return Attribute::Naked;
1081 case bitc::ATTR_KIND_NEST:
1082 return Attribute::Nest;
1083 case bitc::ATTR_KIND_NO_ALIAS:
1084 return Attribute::NoAlias;
1085 case bitc::ATTR_KIND_NO_BUILTIN:
1086 return Attribute::NoBuiltin;
1087 case bitc::ATTR_KIND_NO_CAPTURE:
1088 return Attribute::NoCapture;
1089 case bitc::ATTR_KIND_NO_DUPLICATE:
1090 return Attribute::NoDuplicate;
1091 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
1092 return Attribute::NoImplicitFloat;
1093 case bitc::ATTR_KIND_NO_INLINE:
1094 return Attribute::NoInline;
1095 case bitc::ATTR_KIND_NON_LAZY_BIND:
1096 return Attribute::NonLazyBind;
1097 case bitc::ATTR_KIND_NON_NULL:
1098 return Attribute::NonNull;
1099 case bitc::ATTR_KIND_DEREFERENCEABLE:
1100 return Attribute::Dereferenceable;
1101 case bitc::ATTR_KIND_NO_RED_ZONE:
1102 return Attribute::NoRedZone;
1103 case bitc::ATTR_KIND_NO_RETURN:
1104 return Attribute::NoReturn;
1105 case bitc::ATTR_KIND_NO_UNWIND:
1106 return Attribute::NoUnwind;
1107 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
1108 return Attribute::OptimizeForSize;
1109 case bitc::ATTR_KIND_OPTIMIZE_NONE:
1110 return Attribute::OptimizeNone;
1111 case bitc::ATTR_KIND_READ_NONE:
1112 return Attribute::ReadNone;
1113 case bitc::ATTR_KIND_READ_ONLY:
1114 return Attribute::ReadOnly;
1115 case bitc::ATTR_KIND_RETURNED:
1116 return Attribute::Returned;
1117 case bitc::ATTR_KIND_RETURNS_TWICE:
1118 return Attribute::ReturnsTwice;
1119 case bitc::ATTR_KIND_S_EXT:
1120 return Attribute::SExt;
1121 case bitc::ATTR_KIND_STACK_ALIGNMENT:
1122 return Attribute::StackAlignment;
1123 case bitc::ATTR_KIND_STACK_PROTECT:
1124 return Attribute::StackProtect;
1125 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
1126 return Attribute::StackProtectReq;
1127 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
1128 return Attribute::StackProtectStrong;
1129 case bitc::ATTR_KIND_STRUCT_RET:
1130 return Attribute::StructRet;
1131 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
1132 return Attribute::SanitizeAddress;
1133 case bitc::ATTR_KIND_SANITIZE_THREAD:
1134 return Attribute::SanitizeThread;
1135 case bitc::ATTR_KIND_SANITIZE_MEMORY:
1136 return Attribute::SanitizeMemory;
1137 case bitc::ATTR_KIND_UW_TABLE:
1138 return Attribute::UWTable;
1139 case bitc::ATTR_KIND_Z_EXT:
1140 return Attribute::ZExt;
1144 std::error_code BitcodeReader::parseAlignmentValue(uint64_t Exponent,
1145 unsigned &Alignment) {
1146 // Note: Alignment in bitcode files is incremented by 1, so that zero
1147 // can be used for default alignment.
1148 if (Exponent > Value::MaxAlignmentExponent + 1)
1149 return Error("Invalid alignment value");
1150 Alignment = (1 << static_cast<unsigned>(Exponent)) >> 1;
1151 return std::error_code();
1154 std::error_code BitcodeReader::ParseAttrKind(uint64_t Code,
1155 Attribute::AttrKind *Kind) {
1156 *Kind = GetAttrFromCode(Code);
1157 if (*Kind == Attribute::None)
1158 return Error(BitcodeError::CorruptedBitcode,
1159 "Unknown attribute kind (" + Twine(Code) + ")");
1160 return std::error_code();
1163 std::error_code BitcodeReader::ParseAttributeGroupBlock() {
1164 if (Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
1165 return Error("Invalid record");
1167 if (!MAttributeGroups.empty())
1168 return Error("Invalid multiple blocks");
1170 SmallVector<uint64_t, 64> Record;
1172 // Read all the records.
1174 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1176 switch (Entry.Kind) {
1177 case BitstreamEntry::SubBlock: // Handled for us already.
1178 case BitstreamEntry::Error:
1179 return Error("Malformed block");
1180 case BitstreamEntry::EndBlock:
1181 return std::error_code();
1182 case BitstreamEntry::Record:
1183 // The interesting case.
1189 switch (Stream.readRecord(Entry.ID, Record)) {
1190 default: // Default behavior: ignore.
1192 case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
1193 if (Record.size() < 3)
1194 return Error("Invalid record");
1196 uint64_t GrpID = Record[0];
1197 uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
1200 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1201 if (Record[i] == 0) { // Enum attribute
1202 Attribute::AttrKind Kind;
1203 if (std::error_code EC = ParseAttrKind(Record[++i], &Kind))
1206 B.addAttribute(Kind);
1207 } else if (Record[i] == 1) { // Integer attribute
1208 Attribute::AttrKind Kind;
1209 if (std::error_code EC = ParseAttrKind(Record[++i], &Kind))
1211 if (Kind == Attribute::Alignment)
1212 B.addAlignmentAttr(Record[++i]);
1213 else if (Kind == Attribute::StackAlignment)
1214 B.addStackAlignmentAttr(Record[++i]);
1215 else if (Kind == Attribute::Dereferenceable)
1216 B.addDereferenceableAttr(Record[++i]);
1217 } else { // String attribute
1218 assert((Record[i] == 3 || Record[i] == 4) &&
1219 "Invalid attribute group entry");
1220 bool HasValue = (Record[i++] == 4);
1221 SmallString<64> KindStr;
1222 SmallString<64> ValStr;
1224 while (Record[i] != 0 && i != e)
1225 KindStr += Record[i++];
1226 assert(Record[i] == 0 && "Kind string not null terminated");
1229 // Has a value associated with it.
1230 ++i; // Skip the '0' that terminates the "kind" string.
1231 while (Record[i] != 0 && i != e)
1232 ValStr += Record[i++];
1233 assert(Record[i] == 0 && "Value string not null terminated");
1236 B.addAttribute(KindStr.str(), ValStr.str());
1240 MAttributeGroups[GrpID] = AttributeSet::get(Context, Idx, B);
1247 std::error_code BitcodeReader::ParseTypeTable() {
1248 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
1249 return Error("Invalid record");
1251 return ParseTypeTableBody();
1254 std::error_code BitcodeReader::ParseTypeTableBody() {
1255 if (!TypeList.empty())
1256 return Error("Invalid multiple blocks");
1258 SmallVector<uint64_t, 64> Record;
1259 unsigned NumRecords = 0;
1261 SmallString<64> TypeName;
1263 // Read all the records for this type table.
1265 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1267 switch (Entry.Kind) {
1268 case BitstreamEntry::SubBlock: // Handled for us already.
1269 case BitstreamEntry::Error:
1270 return Error("Malformed block");
1271 case BitstreamEntry::EndBlock:
1272 if (NumRecords != TypeList.size())
1273 return Error("Malformed block");
1274 return std::error_code();
1275 case BitstreamEntry::Record:
1276 // The interesting case.
1282 Type *ResultTy = nullptr;
1283 switch (Stream.readRecord(Entry.ID, Record)) {
1285 return Error("Invalid value");
1286 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
1287 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
1288 // type list. This allows us to reserve space.
1289 if (Record.size() < 1)
1290 return Error("Invalid record");
1291 TypeList.resize(Record[0]);
1293 case bitc::TYPE_CODE_VOID: // VOID
1294 ResultTy = Type::getVoidTy(Context);
1296 case bitc::TYPE_CODE_HALF: // HALF
1297 ResultTy = Type::getHalfTy(Context);
1299 case bitc::TYPE_CODE_FLOAT: // FLOAT
1300 ResultTy = Type::getFloatTy(Context);
1302 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
1303 ResultTy = Type::getDoubleTy(Context);
1305 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
1306 ResultTy = Type::getX86_FP80Ty(Context);
1308 case bitc::TYPE_CODE_FP128: // FP128
1309 ResultTy = Type::getFP128Ty(Context);
1311 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
1312 ResultTy = Type::getPPC_FP128Ty(Context);
1314 case bitc::TYPE_CODE_LABEL: // LABEL
1315 ResultTy = Type::getLabelTy(Context);
1317 case bitc::TYPE_CODE_METADATA: // METADATA
1318 ResultTy = Type::getMetadataTy(Context);
1320 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
1321 ResultTy = Type::getX86_MMXTy(Context);
1323 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
1324 if (Record.size() < 1)
1325 return Error("Invalid record");
1327 uint64_t NumBits = Record[0];
1328 if (NumBits < IntegerType::MIN_INT_BITS ||
1329 NumBits > IntegerType::MAX_INT_BITS)
1330 return Error("Bitwidth for integer type out of range");
1331 ResultTy = IntegerType::get(Context, NumBits);
1334 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
1335 // [pointee type, address space]
1336 if (Record.size() < 1)
1337 return Error("Invalid record");
1338 unsigned AddressSpace = 0;
1339 if (Record.size() == 2)
1340 AddressSpace = Record[1];
1341 ResultTy = getTypeByID(Record[0]);
1343 return Error("Invalid type");
1344 ResultTy = PointerType::get(ResultTy, AddressSpace);
1347 case bitc::TYPE_CODE_FUNCTION_OLD: {
1348 // FIXME: attrid is dead, remove it in LLVM 4.0
1349 // FUNCTION: [vararg, attrid, retty, paramty x N]
1350 if (Record.size() < 3)
1351 return Error("Invalid record");
1352 SmallVector<Type*, 8> ArgTys;
1353 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1354 if (Type *T = getTypeByID(Record[i]))
1355 ArgTys.push_back(T);
1360 ResultTy = getTypeByID(Record[2]);
1361 if (!ResultTy || ArgTys.size() < Record.size()-3)
1362 return Error("Invalid type");
1364 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1367 case bitc::TYPE_CODE_FUNCTION: {
1368 // FUNCTION: [vararg, retty, paramty x N]
1369 if (Record.size() < 2)
1370 return Error("Invalid record");
1371 SmallVector<Type*, 8> ArgTys;
1372 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1373 if (Type *T = getTypeByID(Record[i]))
1374 ArgTys.push_back(T);
1379 ResultTy = getTypeByID(Record[1]);
1380 if (!ResultTy || ArgTys.size() < Record.size()-2)
1381 return Error("Invalid type");
1383 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1386 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1387 if (Record.size() < 1)
1388 return Error("Invalid record");
1389 SmallVector<Type*, 8> EltTys;
1390 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1391 if (Type *T = getTypeByID(Record[i]))
1392 EltTys.push_back(T);
1396 if (EltTys.size() != Record.size()-1)
1397 return Error("Invalid type");
1398 ResultTy = StructType::get(Context, EltTys, Record[0]);
1401 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1402 if (ConvertToString(Record, 0, TypeName))
1403 return Error("Invalid record");
1406 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1407 if (Record.size() < 1)
1408 return Error("Invalid record");
1410 if (NumRecords >= TypeList.size())
1411 return Error("Invalid TYPE table");
1413 // Check to see if this was forward referenced, if so fill in the temp.
1414 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1416 Res->setName(TypeName);
1417 TypeList[NumRecords] = nullptr;
1418 } else // Otherwise, create a new struct.
1419 Res = createIdentifiedStructType(Context, TypeName);
1422 SmallVector<Type*, 8> EltTys;
1423 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1424 if (Type *T = getTypeByID(Record[i]))
1425 EltTys.push_back(T);
1429 if (EltTys.size() != Record.size()-1)
1430 return Error("Invalid record");
1431 Res->setBody(EltTys, Record[0]);
1435 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1436 if (Record.size() != 1)
1437 return Error("Invalid record");
1439 if (NumRecords >= TypeList.size())
1440 return Error("Invalid TYPE table");
1442 // Check to see if this was forward referenced, if so fill in the temp.
1443 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1445 Res->setName(TypeName);
1446 TypeList[NumRecords] = nullptr;
1447 } else // Otherwise, create a new struct with no body.
1448 Res = createIdentifiedStructType(Context, TypeName);
1453 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1454 if (Record.size() < 2)
1455 return Error("Invalid record");
1456 if ((ResultTy = getTypeByID(Record[1])))
1457 ResultTy = ArrayType::get(ResultTy, Record[0]);
1459 return Error("Invalid type");
1461 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
1462 if (Record.size() < 2)
1463 return Error("Invalid record");
1464 if ((ResultTy = getTypeByID(Record[1])))
1465 ResultTy = VectorType::get(ResultTy, Record[0]);
1467 return Error("Invalid type");
1471 if (NumRecords >= TypeList.size())
1472 return Error("Invalid TYPE table");
1473 if (TypeList[NumRecords])
1475 "Invalid TYPE table: Only named structs can be forward referenced");
1476 assert(ResultTy && "Didn't read a type?");
1477 TypeList[NumRecords++] = ResultTy;
1481 std::error_code BitcodeReader::ParseValueSymbolTable() {
1482 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
1483 return Error("Invalid record");
1485 SmallVector<uint64_t, 64> Record;
1487 Triple TT(TheModule->getTargetTriple());
1489 // Read all the records for this value table.
1490 SmallString<128> ValueName;
1492 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1494 switch (Entry.Kind) {
1495 case BitstreamEntry::SubBlock: // Handled for us already.
1496 case BitstreamEntry::Error:
1497 return Error("Malformed block");
1498 case BitstreamEntry::EndBlock:
1499 return std::error_code();
1500 case BitstreamEntry::Record:
1501 // The interesting case.
1507 switch (Stream.readRecord(Entry.ID, Record)) {
1508 default: // Default behavior: unknown type.
1510 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
1511 if (ConvertToString(Record, 1, ValueName))
1512 return Error("Invalid record");
1513 unsigned ValueID = Record[0];
1514 if (ValueID >= ValueList.size() || !ValueList[ValueID])
1515 return Error("Invalid record");
1516 Value *V = ValueList[ValueID];
1518 V->setName(StringRef(ValueName.data(), ValueName.size()));
1519 if (auto *GO = dyn_cast<GlobalObject>(V)) {
1520 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
1521 if (TT.isOSBinFormatMachO())
1522 GO->setComdat(nullptr);
1524 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
1530 case bitc::VST_CODE_BBENTRY: {
1531 if (ConvertToString(Record, 1, ValueName))
1532 return Error("Invalid record");
1533 BasicBlock *BB = getBasicBlock(Record[0]);
1535 return Error("Invalid record");
1537 BB->setName(StringRef(ValueName.data(), ValueName.size()));
1545 static int64_t unrotateSign(uint64_t U) { return U & 1 ? ~(U >> 1) : U >> 1; }
1547 std::error_code BitcodeReader::ParseMetadata() {
1548 IsMetadataMaterialized = true;
1549 unsigned NextMDValueNo = MDValueList.size();
1551 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
1552 return Error("Invalid record");
1554 SmallVector<uint64_t, 64> Record;
1557 [&](unsigned ID) -> Metadata *{ return MDValueList.getValueFwdRef(ID); };
1558 auto getMDOrNull = [&](unsigned ID) -> Metadata *{
1560 return getMD(ID - 1);
1563 auto getMDString = [&](unsigned ID) -> MDString *{
1564 // This requires that the ID is not really a forward reference. In
1565 // particular, the MDString must already have been resolved.
1566 return cast_or_null<MDString>(getMDOrNull(ID));
1569 #define GET_OR_DISTINCT(CLASS, DISTINCT, ARGS) \
1570 (DISTINCT ? CLASS::getDistinct ARGS : CLASS::get ARGS)
1572 // Read all the records.
1574 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1576 switch (Entry.Kind) {
1577 case BitstreamEntry::SubBlock: // Handled for us already.
1578 case BitstreamEntry::Error:
1579 return Error("Malformed block");
1580 case BitstreamEntry::EndBlock:
1581 MDValueList.tryToResolveCycles();
1582 return std::error_code();
1583 case BitstreamEntry::Record:
1584 // The interesting case.
1590 unsigned Code = Stream.readRecord(Entry.ID, Record);
1591 bool IsDistinct = false;
1593 default: // Default behavior: ignore.
1595 case bitc::METADATA_NAME: {
1596 // Read name of the named metadata.
1597 SmallString<8> Name(Record.begin(), Record.end());
1599 Code = Stream.ReadCode();
1601 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
1602 unsigned NextBitCode = Stream.readRecord(Code, Record);
1603 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
1605 // Read named metadata elements.
1606 unsigned Size = Record.size();
1607 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
1608 for (unsigned i = 0; i != Size; ++i) {
1609 MDNode *MD = dyn_cast_or_null<MDNode>(MDValueList.getValueFwdRef(Record[i]));
1611 return Error("Invalid record");
1612 NMD->addOperand(MD);
1616 case bitc::METADATA_OLD_FN_NODE: {
1617 // FIXME: Remove in 4.0.
1618 // This is a LocalAsMetadata record, the only type of function-local
1620 if (Record.size() % 2 == 1)
1621 return Error("Invalid record");
1623 // If this isn't a LocalAsMetadata record, we're dropping it. This used
1624 // to be legal, but there's no upgrade path.
1625 auto dropRecord = [&] {
1626 MDValueList.AssignValue(MDNode::get(Context, None), NextMDValueNo++);
1628 if (Record.size() != 2) {
1633 Type *Ty = getTypeByID(Record[0]);
1634 if (Ty->isMetadataTy() || Ty->isVoidTy()) {
1639 MDValueList.AssignValue(
1640 LocalAsMetadata::get(ValueList.getValueFwdRef(Record[1], Ty)),
1644 case bitc::METADATA_OLD_NODE: {
1645 // FIXME: Remove in 4.0.
1646 if (Record.size() % 2 == 1)
1647 return Error("Invalid record");
1649 unsigned Size = Record.size();
1650 SmallVector<Metadata *, 8> Elts;
1651 for (unsigned i = 0; i != Size; i += 2) {
1652 Type *Ty = getTypeByID(Record[i]);
1654 return Error("Invalid record");
1655 if (Ty->isMetadataTy())
1656 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
1657 else if (!Ty->isVoidTy()) {
1659 ValueAsMetadata::get(ValueList.getValueFwdRef(Record[i + 1], Ty));
1660 assert(isa<ConstantAsMetadata>(MD) &&
1661 "Expected non-function-local metadata");
1664 Elts.push_back(nullptr);
1666 MDValueList.AssignValue(MDNode::get(Context, Elts), NextMDValueNo++);
1669 case bitc::METADATA_VALUE: {
1670 if (Record.size() != 2)
1671 return Error("Invalid record");
1673 Type *Ty = getTypeByID(Record[0]);
1674 if (Ty->isMetadataTy() || Ty->isVoidTy())
1675 return Error("Invalid record");
1677 MDValueList.AssignValue(
1678 ValueAsMetadata::get(ValueList.getValueFwdRef(Record[1], Ty)),
1682 case bitc::METADATA_DISTINCT_NODE:
1685 case bitc::METADATA_NODE: {
1686 SmallVector<Metadata *, 8> Elts;
1687 Elts.reserve(Record.size());
1688 for (unsigned ID : Record)
1689 Elts.push_back(ID ? MDValueList.getValueFwdRef(ID - 1) : nullptr);
1690 MDValueList.AssignValue(IsDistinct ? MDNode::getDistinct(Context, Elts)
1691 : MDNode::get(Context, Elts),
1695 case bitc::METADATA_LOCATION: {
1696 if (Record.size() != 5)
1697 return Error("Invalid record");
1699 unsigned Line = Record[1];
1700 unsigned Column = Record[2];
1701 MDNode *Scope = cast<MDNode>(MDValueList.getValueFwdRef(Record[3]));
1702 Metadata *InlinedAt =
1703 Record[4] ? MDValueList.getValueFwdRef(Record[4] - 1) : nullptr;
1704 MDValueList.AssignValue(
1705 GET_OR_DISTINCT(MDLocation, Record[0],
1706 (Context, Line, Column, Scope, InlinedAt)),
1710 case bitc::METADATA_GENERIC_DEBUG: {
1711 if (Record.size() < 4)
1712 return Error("Invalid record");
1714 unsigned Tag = Record[1];
1715 unsigned Version = Record[2];
1717 if (Tag >= 1u << 16 || Version != 0)
1718 return Error("Invalid record");
1720 auto *Header = getMDString(Record[3]);
1721 SmallVector<Metadata *, 8> DwarfOps;
1722 for (unsigned I = 4, E = Record.size(); I != E; ++I)
1723 DwarfOps.push_back(Record[I] ? MDValueList.getValueFwdRef(Record[I] - 1)
1725 MDValueList.AssignValue(GET_OR_DISTINCT(GenericDebugNode, Record[0],
1726 (Context, Tag, Header, DwarfOps)),
1730 case bitc::METADATA_SUBRANGE: {
1731 if (Record.size() != 3)
1732 return Error("Invalid record");
1734 MDValueList.AssignValue(
1735 GET_OR_DISTINCT(MDSubrange, Record[0],
1736 (Context, Record[1], unrotateSign(Record[2]))),
1740 case bitc::METADATA_ENUMERATOR: {
1741 if (Record.size() != 3)
1742 return Error("Invalid record");
1744 MDValueList.AssignValue(GET_OR_DISTINCT(MDEnumerator, Record[0],
1745 (Context, unrotateSign(Record[1]),
1746 getMDString(Record[2]))),
1750 case bitc::METADATA_BASIC_TYPE: {
1751 if (Record.size() != 6)
1752 return Error("Invalid record");
1754 MDValueList.AssignValue(
1755 GET_OR_DISTINCT(MDBasicType, Record[0],
1756 (Context, Record[1], getMDString(Record[2]),
1757 Record[3], Record[4], Record[5])),
1761 case bitc::METADATA_DERIVED_TYPE: {
1762 if (Record.size() != 12)
1763 return Error("Invalid record");
1765 MDValueList.AssignValue(
1766 GET_OR_DISTINCT(MDDerivedType, Record[0],
1767 (Context, Record[1], getMDString(Record[2]),
1768 getMDOrNull(Record[3]), Record[4],
1769 getMDOrNull(Record[5]), getMDOrNull(Record[6]),
1770 Record[7], Record[8], Record[9], Record[10],
1771 getMDOrNull(Record[11]))),
1775 case bitc::METADATA_COMPOSITE_TYPE: {
1776 if (Record.size() != 16)
1777 return Error("Invalid record");
1779 MDValueList.AssignValue(
1780 GET_OR_DISTINCT(MDCompositeType, Record[0],
1781 (Context, Record[1], getMDString(Record[2]),
1782 getMDOrNull(Record[3]), Record[4],
1783 getMDOrNull(Record[5]), getMDOrNull(Record[6]),
1784 Record[7], Record[8], Record[9], Record[10],
1785 getMDOrNull(Record[11]), Record[12],
1786 getMDOrNull(Record[13]), getMDOrNull(Record[14]),
1787 getMDString(Record[15]))),
1791 case bitc::METADATA_SUBROUTINE_TYPE: {
1792 if (Record.size() != 3)
1793 return Error("Invalid record");
1795 MDValueList.AssignValue(
1796 GET_OR_DISTINCT(MDSubroutineType, Record[0],
1797 (Context, Record[1], getMDOrNull(Record[2]))),
1801 case bitc::METADATA_FILE: {
1802 if (Record.size() != 3)
1803 return Error("Invalid record");
1805 MDValueList.AssignValue(
1806 GET_OR_DISTINCT(MDFile, Record[0], (Context, getMDString(Record[1]),
1807 getMDString(Record[2]))),
1811 case bitc::METADATA_COMPILE_UNIT: {
1812 if (Record.size() != 14)
1813 return Error("Invalid record");
1815 MDValueList.AssignValue(
1816 GET_OR_DISTINCT(MDCompileUnit, Record[0],
1817 (Context, Record[1], getMDOrNull(Record[2]),
1818 getMDString(Record[3]), Record[4],
1819 getMDString(Record[5]), Record[6],
1820 getMDString(Record[7]), Record[8],
1821 getMDOrNull(Record[9]), getMDOrNull(Record[10]),
1822 getMDOrNull(Record[11]), getMDOrNull(Record[12]),
1823 getMDOrNull(Record[13]))),
1827 case bitc::METADATA_SUBPROGRAM: {
1828 if (Record.size() != 19)
1829 return Error("Invalid record");
1831 MDValueList.AssignValue(
1833 MDSubprogram, Record[0],
1834 (Context, getMDOrNull(Record[1]), getMDString(Record[2]),
1835 getMDString(Record[3]), getMDOrNull(Record[4]), Record[5],
1836 getMDOrNull(Record[6]), Record[7], Record[8], Record[9],
1837 getMDOrNull(Record[10]), Record[11], Record[12], Record[13],
1838 Record[14], getMDOrNull(Record[15]), getMDOrNull(Record[16]),
1839 getMDOrNull(Record[17]), getMDOrNull(Record[18]))),
1843 case bitc::METADATA_LEXICAL_BLOCK: {
1844 if (Record.size() != 5)
1845 return Error("Invalid record");
1847 MDValueList.AssignValue(
1848 GET_OR_DISTINCT(MDLexicalBlock, Record[0],
1849 (Context, getMDOrNull(Record[1]),
1850 getMDOrNull(Record[2]), Record[3], Record[4])),
1854 case bitc::METADATA_LEXICAL_BLOCK_FILE: {
1855 if (Record.size() != 4)
1856 return Error("Invalid record");
1858 MDValueList.AssignValue(
1859 GET_OR_DISTINCT(MDLexicalBlockFile, Record[0],
1860 (Context, getMDOrNull(Record[1]),
1861 getMDOrNull(Record[2]), Record[3])),
1865 case bitc::METADATA_NAMESPACE: {
1866 if (Record.size() != 5)
1867 return Error("Invalid record");
1869 MDValueList.AssignValue(
1870 GET_OR_DISTINCT(MDNamespace, Record[0],
1871 (Context, getMDOrNull(Record[1]),
1872 getMDOrNull(Record[2]), getMDString(Record[3]),
1877 case bitc::METADATA_TEMPLATE_TYPE: {
1878 if (Record.size() != 3)
1879 return Error("Invalid record");
1881 MDValueList.AssignValue(GET_OR_DISTINCT(MDTemplateTypeParameter,
1883 (Context, getMDString(Record[1]),
1884 getMDOrNull(Record[2]))),
1888 case bitc::METADATA_TEMPLATE_VALUE: {
1889 if (Record.size() != 5)
1890 return Error("Invalid record");
1892 MDValueList.AssignValue(
1893 GET_OR_DISTINCT(MDTemplateValueParameter, Record[0],
1894 (Context, Record[1], getMDString(Record[2]),
1895 getMDOrNull(Record[3]), getMDOrNull(Record[4]))),
1899 case bitc::METADATA_GLOBAL_VAR: {
1900 if (Record.size() != 11)
1901 return Error("Invalid record");
1903 MDValueList.AssignValue(
1904 GET_OR_DISTINCT(MDGlobalVariable, Record[0],
1905 (Context, getMDOrNull(Record[1]),
1906 getMDString(Record[2]), getMDString(Record[3]),
1907 getMDOrNull(Record[4]), Record[5],
1908 getMDOrNull(Record[6]), Record[7], Record[8],
1909 getMDOrNull(Record[9]), getMDOrNull(Record[10]))),
1913 case bitc::METADATA_LOCAL_VAR: {
1914 if (Record.size() != 10)
1915 return Error("Invalid record");
1917 MDValueList.AssignValue(
1918 GET_OR_DISTINCT(MDLocalVariable, Record[0],
1919 (Context, Record[1], getMDOrNull(Record[2]),
1920 getMDString(Record[3]), getMDOrNull(Record[4]),
1921 Record[5], getMDOrNull(Record[6]), Record[7],
1922 Record[8], getMDOrNull(Record[9]))),
1926 case bitc::METADATA_EXPRESSION: {
1927 if (Record.size() < 1)
1928 return Error("Invalid record");
1930 MDValueList.AssignValue(
1931 GET_OR_DISTINCT(MDExpression, Record[0],
1932 (Context, makeArrayRef(Record).slice(1))),
1936 case bitc::METADATA_OBJC_PROPERTY: {
1937 if (Record.size() != 8)
1938 return Error("Invalid record");
1940 MDValueList.AssignValue(
1941 GET_OR_DISTINCT(MDObjCProperty, Record[0],
1942 (Context, getMDString(Record[1]),
1943 getMDOrNull(Record[2]), Record[3],
1944 getMDString(Record[4]), getMDString(Record[5]),
1945 Record[6], getMDOrNull(Record[7]))),
1949 case bitc::METADATA_IMPORTED_ENTITY: {
1950 if (Record.size() != 6)
1951 return Error("Invalid record");
1953 MDValueList.AssignValue(
1954 GET_OR_DISTINCT(MDImportedEntity, Record[0],
1955 (Context, Record[1], getMDOrNull(Record[2]),
1956 getMDOrNull(Record[3]), Record[4],
1957 getMDString(Record[5]))),
1961 case bitc::METADATA_STRING: {
1962 std::string String(Record.begin(), Record.end());
1963 llvm::UpgradeMDStringConstant(String);
1964 Metadata *MD = MDString::get(Context, String);
1965 MDValueList.AssignValue(MD, NextMDValueNo++);
1968 case bitc::METADATA_KIND: {
1969 if (Record.size() < 2)
1970 return Error("Invalid record");
1972 unsigned Kind = Record[0];
1973 SmallString<8> Name(Record.begin()+1, Record.end());
1975 unsigned NewKind = TheModule->getMDKindID(Name.str());
1976 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
1977 return Error("Conflicting METADATA_KIND records");
1982 #undef GET_OR_DISTINCT
1985 /// decodeSignRotatedValue - Decode a signed value stored with the sign bit in
1986 /// the LSB for dense VBR encoding.
1987 uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
1992 // There is no such thing as -0 with integers. "-0" really means MININT.
1996 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
1997 /// values and aliases that we can.
1998 std::error_code BitcodeReader::ResolveGlobalAndAliasInits() {
1999 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
2000 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
2001 std::vector<std::pair<Function*, unsigned> > FunctionPrefixWorklist;
2002 std::vector<std::pair<Function*, unsigned> > FunctionPrologueWorklist;
2004 GlobalInitWorklist.swap(GlobalInits);
2005 AliasInitWorklist.swap(AliasInits);
2006 FunctionPrefixWorklist.swap(FunctionPrefixes);
2007 FunctionPrologueWorklist.swap(FunctionPrologues);
2009 while (!GlobalInitWorklist.empty()) {
2010 unsigned ValID = GlobalInitWorklist.back().second;
2011 if (ValID >= ValueList.size()) {
2012 // Not ready to resolve this yet, it requires something later in the file.
2013 GlobalInits.push_back(GlobalInitWorklist.back());
2015 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2016 GlobalInitWorklist.back().first->setInitializer(C);
2018 return Error("Expected a constant");
2020 GlobalInitWorklist.pop_back();
2023 while (!AliasInitWorklist.empty()) {
2024 unsigned ValID = AliasInitWorklist.back().second;
2025 if (ValID >= ValueList.size()) {
2026 AliasInits.push_back(AliasInitWorklist.back());
2028 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2029 AliasInitWorklist.back().first->setAliasee(C);
2031 return Error("Expected a constant");
2033 AliasInitWorklist.pop_back();
2036 while (!FunctionPrefixWorklist.empty()) {
2037 unsigned ValID = FunctionPrefixWorklist.back().second;
2038 if (ValID >= ValueList.size()) {
2039 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
2041 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2042 FunctionPrefixWorklist.back().first->setPrefixData(C);
2044 return Error("Expected a constant");
2046 FunctionPrefixWorklist.pop_back();
2049 while (!FunctionPrologueWorklist.empty()) {
2050 unsigned ValID = FunctionPrologueWorklist.back().second;
2051 if (ValID >= ValueList.size()) {
2052 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
2054 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
2055 FunctionPrologueWorklist.back().first->setPrologueData(C);
2057 return Error("Expected a constant");
2059 FunctionPrologueWorklist.pop_back();
2062 return std::error_code();
2065 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
2066 SmallVector<uint64_t, 8> Words(Vals.size());
2067 std::transform(Vals.begin(), Vals.end(), Words.begin(),
2068 BitcodeReader::decodeSignRotatedValue);
2070 return APInt(TypeBits, Words);
2073 std::error_code BitcodeReader::ParseConstants() {
2074 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
2075 return Error("Invalid record");
2077 SmallVector<uint64_t, 64> Record;
2079 // Read all the records for this value table.
2080 Type *CurTy = Type::getInt32Ty(Context);
2081 unsigned NextCstNo = ValueList.size();
2083 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2085 switch (Entry.Kind) {
2086 case BitstreamEntry::SubBlock: // Handled for us already.
2087 case BitstreamEntry::Error:
2088 return Error("Malformed block");
2089 case BitstreamEntry::EndBlock:
2090 if (NextCstNo != ValueList.size())
2091 return Error("Invalid ronstant reference");
2093 // Once all the constants have been read, go through and resolve forward
2095 ValueList.ResolveConstantForwardRefs();
2096 return std::error_code();
2097 case BitstreamEntry::Record:
2098 // The interesting case.
2105 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
2107 default: // Default behavior: unknown constant
2108 case bitc::CST_CODE_UNDEF: // UNDEF
2109 V = UndefValue::get(CurTy);
2111 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
2113 return Error("Invalid record");
2114 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
2115 return Error("Invalid record");
2116 CurTy = TypeList[Record[0]];
2117 continue; // Skip the ValueList manipulation.
2118 case bitc::CST_CODE_NULL: // NULL
2119 V = Constant::getNullValue(CurTy);
2121 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
2122 if (!CurTy->isIntegerTy() || Record.empty())
2123 return Error("Invalid record");
2124 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
2126 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
2127 if (!CurTy->isIntegerTy() || Record.empty())
2128 return Error("Invalid record");
2130 APInt VInt = ReadWideAPInt(Record,
2131 cast<IntegerType>(CurTy)->getBitWidth());
2132 V = ConstantInt::get(Context, VInt);
2136 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
2138 return Error("Invalid record");
2139 if (CurTy->isHalfTy())
2140 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf,
2141 APInt(16, (uint16_t)Record[0])));
2142 else if (CurTy->isFloatTy())
2143 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle,
2144 APInt(32, (uint32_t)Record[0])));
2145 else if (CurTy->isDoubleTy())
2146 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble,
2147 APInt(64, Record[0])));
2148 else if (CurTy->isX86_FP80Ty()) {
2149 // Bits are not stored the same way as a normal i80 APInt, compensate.
2150 uint64_t Rearrange[2];
2151 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
2152 Rearrange[1] = Record[0] >> 48;
2153 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended,
2154 APInt(80, Rearrange)));
2155 } else if (CurTy->isFP128Ty())
2156 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad,
2157 APInt(128, Record)));
2158 else if (CurTy->isPPC_FP128Ty())
2159 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble,
2160 APInt(128, Record)));
2162 V = UndefValue::get(CurTy);
2166 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
2168 return Error("Invalid record");
2170 unsigned Size = Record.size();
2171 SmallVector<Constant*, 16> Elts;
2173 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
2174 for (unsigned i = 0; i != Size; ++i)
2175 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
2176 STy->getElementType(i)));
2177 V = ConstantStruct::get(STy, Elts);
2178 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
2179 Type *EltTy = ATy->getElementType();
2180 for (unsigned i = 0; i != Size; ++i)
2181 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2182 V = ConstantArray::get(ATy, Elts);
2183 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
2184 Type *EltTy = VTy->getElementType();
2185 for (unsigned i = 0; i != Size; ++i)
2186 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
2187 V = ConstantVector::get(Elts);
2189 V = UndefValue::get(CurTy);
2193 case bitc::CST_CODE_STRING: // STRING: [values]
2194 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
2196 return Error("Invalid record");
2198 SmallString<16> Elts(Record.begin(), Record.end());
2199 V = ConstantDataArray::getString(Context, Elts,
2200 BitCode == bitc::CST_CODE_CSTRING);
2203 case bitc::CST_CODE_DATA: {// DATA: [n x value]
2205 return Error("Invalid record");
2207 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
2208 unsigned Size = Record.size();
2210 if (EltTy->isIntegerTy(8)) {
2211 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
2212 if (isa<VectorType>(CurTy))
2213 V = ConstantDataVector::get(Context, Elts);
2215 V = ConstantDataArray::get(Context, Elts);
2216 } else if (EltTy->isIntegerTy(16)) {
2217 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
2218 if (isa<VectorType>(CurTy))
2219 V = ConstantDataVector::get(Context, Elts);
2221 V = ConstantDataArray::get(Context, Elts);
2222 } else if (EltTy->isIntegerTy(32)) {
2223 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
2224 if (isa<VectorType>(CurTy))
2225 V = ConstantDataVector::get(Context, Elts);
2227 V = ConstantDataArray::get(Context, Elts);
2228 } else if (EltTy->isIntegerTy(64)) {
2229 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
2230 if (isa<VectorType>(CurTy))
2231 V = ConstantDataVector::get(Context, Elts);
2233 V = ConstantDataArray::get(Context, Elts);
2234 } else if (EltTy->isFloatTy()) {
2235 SmallVector<float, 16> Elts(Size);
2236 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
2237 if (isa<VectorType>(CurTy))
2238 V = ConstantDataVector::get(Context, Elts);
2240 V = ConstantDataArray::get(Context, Elts);
2241 } else if (EltTy->isDoubleTy()) {
2242 SmallVector<double, 16> Elts(Size);
2243 std::transform(Record.begin(), Record.end(), Elts.begin(),
2245 if (isa<VectorType>(CurTy))
2246 V = ConstantDataVector::get(Context, Elts);
2248 V = ConstantDataArray::get(Context, Elts);
2250 return Error("Invalid type for value");
2255 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
2256 if (Record.size() < 3)
2257 return Error("Invalid record");
2258 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
2260 V = UndefValue::get(CurTy); // Unknown binop.
2262 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
2263 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
2265 if (Record.size() >= 4) {
2266 if (Opc == Instruction::Add ||
2267 Opc == Instruction::Sub ||
2268 Opc == Instruction::Mul ||
2269 Opc == Instruction::Shl) {
2270 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2271 Flags |= OverflowingBinaryOperator::NoSignedWrap;
2272 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2273 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
2274 } else if (Opc == Instruction::SDiv ||
2275 Opc == Instruction::UDiv ||
2276 Opc == Instruction::LShr ||
2277 Opc == Instruction::AShr) {
2278 if (Record[3] & (1 << bitc::PEO_EXACT))
2279 Flags |= SDivOperator::IsExact;
2282 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
2286 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
2287 if (Record.size() < 3)
2288 return Error("Invalid record");
2289 int Opc = GetDecodedCastOpcode(Record[0]);
2291 V = UndefValue::get(CurTy); // Unknown cast.
2293 Type *OpTy = getTypeByID(Record[1]);
2295 return Error("Invalid record");
2296 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
2297 V = UpgradeBitCastExpr(Opc, Op, CurTy);
2298 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
2302 case bitc::CST_CODE_CE_INBOUNDS_GEP:
2303 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
2305 Type *PointeeType = nullptr;
2306 if (Record.size() % 2)
2307 PointeeType = getTypeByID(Record[OpNum++]);
2308 SmallVector<Constant*, 16> Elts;
2309 while (OpNum != Record.size()) {
2310 Type *ElTy = getTypeByID(Record[OpNum++]);
2312 return Error("Invalid record");
2313 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
2318 cast<SequentialType>(Elts[0]->getType()->getScalarType())
2320 return Error("Explicit gep operator type does not match pointee type "
2321 "of pointer operand");
2323 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
2324 V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
2326 bitc::CST_CODE_CE_INBOUNDS_GEP);
2329 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
2330 if (Record.size() < 3)
2331 return Error("Invalid record");
2333 Type *SelectorTy = Type::getInt1Ty(Context);
2335 // If CurTy is a vector of length n, then Record[0] must be a <n x i1>
2336 // vector. Otherwise, it must be a single bit.
2337 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
2338 SelectorTy = VectorType::get(Type::getInt1Ty(Context),
2339 VTy->getNumElements());
2341 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
2343 ValueList.getConstantFwdRef(Record[1],CurTy),
2344 ValueList.getConstantFwdRef(Record[2],CurTy));
2347 case bitc::CST_CODE_CE_EXTRACTELT
2348 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
2349 if (Record.size() < 3)
2350 return Error("Invalid record");
2352 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2354 return Error("Invalid record");
2355 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2356 Constant *Op1 = nullptr;
2357 if (Record.size() == 4) {
2358 Type *IdxTy = getTypeByID(Record[2]);
2360 return Error("Invalid record");
2361 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2362 } else // TODO: Remove with llvm 4.0
2363 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2365 return Error("Invalid record");
2366 V = ConstantExpr::getExtractElement(Op0, Op1);
2369 case bitc::CST_CODE_CE_INSERTELT
2370 : { // CE_INSERTELT: [opval, opval, opty, opval]
2371 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2372 if (Record.size() < 3 || !OpTy)
2373 return Error("Invalid record");
2374 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2375 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2376 OpTy->getElementType());
2377 Constant *Op2 = nullptr;
2378 if (Record.size() == 4) {
2379 Type *IdxTy = getTypeByID(Record[2]);
2381 return Error("Invalid record");
2382 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2383 } else // TODO: Remove with llvm 4.0
2384 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2386 return Error("Invalid record");
2387 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2390 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, 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], OpTy);
2396 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2397 OpTy->getNumElements());
2398 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
2399 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2402 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2403 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2405 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2406 if (Record.size() < 4 || !RTy || !OpTy)
2407 return Error("Invalid record");
2408 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2409 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2410 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2411 RTy->getNumElements());
2412 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
2413 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2416 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2417 if (Record.size() < 4)
2418 return Error("Invalid record");
2419 Type *OpTy = getTypeByID(Record[0]);
2421 return Error("Invalid record");
2422 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2423 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2425 if (OpTy->isFPOrFPVectorTy())
2426 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2428 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2431 // This maintains backward compatibility, pre-asm dialect keywords.
2432 // FIXME: Remove with the 4.0 release.
2433 case bitc::CST_CODE_INLINEASM_OLD: {
2434 if (Record.size() < 2)
2435 return Error("Invalid record");
2436 std::string AsmStr, ConstrStr;
2437 bool HasSideEffects = Record[0] & 1;
2438 bool IsAlignStack = Record[0] >> 1;
2439 unsigned AsmStrSize = Record[1];
2440 if (2+AsmStrSize >= Record.size())
2441 return Error("Invalid record");
2442 unsigned ConstStrSize = Record[2+AsmStrSize];
2443 if (3+AsmStrSize+ConstStrSize > Record.size())
2444 return Error("Invalid record");
2446 for (unsigned i = 0; i != AsmStrSize; ++i)
2447 AsmStr += (char)Record[2+i];
2448 for (unsigned i = 0; i != ConstStrSize; ++i)
2449 ConstrStr += (char)Record[3+AsmStrSize+i];
2450 PointerType *PTy = cast<PointerType>(CurTy);
2451 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2452 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
2455 // This version adds support for the asm dialect keywords (e.g.,
2457 case bitc::CST_CODE_INLINEASM: {
2458 if (Record.size() < 2)
2459 return Error("Invalid record");
2460 std::string AsmStr, ConstrStr;
2461 bool HasSideEffects = Record[0] & 1;
2462 bool IsAlignStack = (Record[0] >> 1) & 1;
2463 unsigned AsmDialect = Record[0] >> 2;
2464 unsigned AsmStrSize = Record[1];
2465 if (2+AsmStrSize >= Record.size())
2466 return Error("Invalid record");
2467 unsigned ConstStrSize = Record[2+AsmStrSize];
2468 if (3+AsmStrSize+ConstStrSize > Record.size())
2469 return Error("Invalid record");
2471 for (unsigned i = 0; i != AsmStrSize; ++i)
2472 AsmStr += (char)Record[2+i];
2473 for (unsigned i = 0; i != ConstStrSize; ++i)
2474 ConstrStr += (char)Record[3+AsmStrSize+i];
2475 PointerType *PTy = cast<PointerType>(CurTy);
2476 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2477 AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
2478 InlineAsm::AsmDialect(AsmDialect));
2481 case bitc::CST_CODE_BLOCKADDRESS:{
2482 if (Record.size() < 3)
2483 return Error("Invalid record");
2484 Type *FnTy = getTypeByID(Record[0]);
2486 return Error("Invalid record");
2488 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2490 return Error("Invalid record");
2492 // Don't let Fn get dematerialized.
2493 BlockAddressesTaken.insert(Fn);
2495 // If the function is already parsed we can insert the block address right
2498 unsigned BBID = Record[2];
2500 // Invalid reference to entry block.
2501 return Error("Invalid ID");
2503 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2504 for (size_t I = 0, E = BBID; I != E; ++I) {
2506 return Error("Invalid ID");
2511 // Otherwise insert a placeholder and remember it so it can be inserted
2512 // when the function is parsed.
2513 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2515 BasicBlockFwdRefQueue.push_back(Fn);
2516 if (FwdBBs.size() < BBID + 1)
2517 FwdBBs.resize(BBID + 1);
2519 FwdBBs[BBID] = BasicBlock::Create(Context);
2522 V = BlockAddress::get(Fn, BB);
2527 ValueList.AssignValue(V, NextCstNo);
2532 std::error_code BitcodeReader::ParseUseLists() {
2533 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2534 return Error("Invalid record");
2536 // Read all the records.
2537 SmallVector<uint64_t, 64> Record;
2539 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2541 switch (Entry.Kind) {
2542 case BitstreamEntry::SubBlock: // Handled for us already.
2543 case BitstreamEntry::Error:
2544 return Error("Malformed block");
2545 case BitstreamEntry::EndBlock:
2546 return std::error_code();
2547 case BitstreamEntry::Record:
2548 // The interesting case.
2552 // Read a use list record.
2555 switch (Stream.readRecord(Entry.ID, Record)) {
2556 default: // Default behavior: unknown type.
2558 case bitc::USELIST_CODE_BB:
2561 case bitc::USELIST_CODE_DEFAULT: {
2562 unsigned RecordLength = Record.size();
2563 if (RecordLength < 3)
2564 // Records should have at least an ID and two indexes.
2565 return Error("Invalid record");
2566 unsigned ID = Record.back();
2571 assert(ID < FunctionBBs.size() && "Basic block not found");
2572 V = FunctionBBs[ID];
2575 unsigned NumUses = 0;
2576 SmallDenseMap<const Use *, unsigned, 16> Order;
2577 for (const Use &U : V->uses()) {
2578 if (++NumUses > Record.size())
2580 Order[&U] = Record[NumUses - 1];
2582 if (Order.size() != Record.size() || NumUses > Record.size())
2583 // Mismatches can happen if the functions are being materialized lazily
2584 // (out-of-order), or a value has been upgraded.
2587 V->sortUseList([&](const Use &L, const Use &R) {
2588 return Order.lookup(&L) < Order.lookup(&R);
2596 /// When we see the block for metadata, remember where it is and then skip it.
2597 /// This lets us lazily deserialize the metadata.
2598 std::error_code BitcodeReader::rememberAndSkipMetadata() {
2599 // Save the current stream state.
2600 uint64_t CurBit = Stream.GetCurrentBitNo();
2601 DeferredMetadataInfo.push_back(CurBit);
2603 // Skip over the block for now.
2604 if (Stream.SkipBlock())
2605 return Error("Invalid record");
2606 return std::error_code();
2609 std::error_code BitcodeReader::materializeMetadata() {
2610 for (uint64_t BitPos : DeferredMetadataInfo) {
2611 // Move the bit stream to the saved position.
2612 Stream.JumpToBit(BitPos);
2613 if (std::error_code EC = ParseMetadata())
2616 DeferredMetadataInfo.clear();
2617 return std::error_code();
2620 void BitcodeReader::setStripDebugInfo() { StripDebugInfo = true; }
2622 /// RememberAndSkipFunctionBody - When we see the block for a function body,
2623 /// remember where it is and then skip it. This lets us lazily deserialize the
2625 std::error_code BitcodeReader::RememberAndSkipFunctionBody() {
2626 // Get the function we are talking about.
2627 if (FunctionsWithBodies.empty())
2628 return Error("Insufficient function protos");
2630 Function *Fn = FunctionsWithBodies.back();
2631 FunctionsWithBodies.pop_back();
2633 // Save the current stream state.
2634 uint64_t CurBit = Stream.GetCurrentBitNo();
2635 DeferredFunctionInfo[Fn] = CurBit;
2637 // Skip over the function block for now.
2638 if (Stream.SkipBlock())
2639 return Error("Invalid record");
2640 return std::error_code();
2643 std::error_code BitcodeReader::GlobalCleanup() {
2644 // Patch the initializers for globals and aliases up.
2645 ResolveGlobalAndAliasInits();
2646 if (!GlobalInits.empty() || !AliasInits.empty())
2647 return Error("Malformed global initializer set");
2649 // Look for intrinsic functions which need to be upgraded at some point
2650 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
2653 if (UpgradeIntrinsicFunction(FI, NewFn))
2654 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
2657 // Look for global variables which need to be renamed.
2658 for (Module::global_iterator
2659 GI = TheModule->global_begin(), GE = TheModule->global_end();
2661 GlobalVariable *GV = GI++;
2662 UpgradeGlobalVariable(GV);
2665 // Force deallocation of memory for these vectors to favor the client that
2666 // want lazy deserialization.
2667 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
2668 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
2669 return std::error_code();
2672 std::error_code BitcodeReader::ParseModule(bool Resume,
2673 bool ShouldLazyLoadMetadata) {
2675 Stream.JumpToBit(NextUnreadBit);
2676 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
2677 return Error("Invalid record");
2679 SmallVector<uint64_t, 64> Record;
2680 std::vector<std::string> SectionTable;
2681 std::vector<std::string> GCTable;
2683 // Read all the records for this module.
2685 BitstreamEntry Entry = Stream.advance();
2687 switch (Entry.Kind) {
2688 case BitstreamEntry::Error:
2689 return Error("Malformed block");
2690 case BitstreamEntry::EndBlock:
2691 return GlobalCleanup();
2693 case BitstreamEntry::SubBlock:
2695 default: // Skip unknown content.
2696 if (Stream.SkipBlock())
2697 return Error("Invalid record");
2699 case bitc::BLOCKINFO_BLOCK_ID:
2700 if (Stream.ReadBlockInfoBlock())
2701 return Error("Malformed block");
2703 case bitc::PARAMATTR_BLOCK_ID:
2704 if (std::error_code EC = ParseAttributeBlock())
2707 case bitc::PARAMATTR_GROUP_BLOCK_ID:
2708 if (std::error_code EC = ParseAttributeGroupBlock())
2711 case bitc::TYPE_BLOCK_ID_NEW:
2712 if (std::error_code EC = ParseTypeTable())
2715 case bitc::VALUE_SYMTAB_BLOCK_ID:
2716 if (std::error_code EC = ParseValueSymbolTable())
2718 SeenValueSymbolTable = true;
2720 case bitc::CONSTANTS_BLOCK_ID:
2721 if (std::error_code EC = ParseConstants())
2723 if (std::error_code EC = ResolveGlobalAndAliasInits())
2726 case bitc::METADATA_BLOCK_ID:
2727 if (ShouldLazyLoadMetadata && !IsMetadataMaterialized) {
2728 if (std::error_code EC = rememberAndSkipMetadata())
2732 assert(DeferredMetadataInfo.empty() && "Unexpected deferred metadata");
2733 if (std::error_code EC = ParseMetadata())
2736 case bitc::FUNCTION_BLOCK_ID:
2737 // If this is the first function body we've seen, reverse the
2738 // FunctionsWithBodies list.
2739 if (!SeenFirstFunctionBody) {
2740 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
2741 if (std::error_code EC = GlobalCleanup())
2743 SeenFirstFunctionBody = true;
2746 if (std::error_code EC = RememberAndSkipFunctionBody())
2748 // For streaming bitcode, suspend parsing when we reach the function
2749 // bodies. Subsequent materialization calls will resume it when
2750 // necessary. For streaming, the function bodies must be at the end of
2751 // the bitcode. If the bitcode file is old, the symbol table will be
2752 // at the end instead and will not have been seen yet. In this case,
2753 // just finish the parse now.
2754 if (LazyStreamer && SeenValueSymbolTable) {
2755 NextUnreadBit = Stream.GetCurrentBitNo();
2756 return std::error_code();
2759 case bitc::USELIST_BLOCK_ID:
2760 if (std::error_code EC = ParseUseLists())
2766 case BitstreamEntry::Record:
2767 // The interesting case.
2773 switch (Stream.readRecord(Entry.ID, Record)) {
2774 default: break; // Default behavior, ignore unknown content.
2775 case bitc::MODULE_CODE_VERSION: { // VERSION: [version#]
2776 if (Record.size() < 1)
2777 return Error("Invalid record");
2778 // Only version #0 and #1 are supported so far.
2779 unsigned module_version = Record[0];
2780 switch (module_version) {
2782 return Error("Invalid value");
2784 UseRelativeIDs = false;
2787 UseRelativeIDs = true;
2792 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
2794 if (ConvertToString(Record, 0, S))
2795 return Error("Invalid record");
2796 TheModule->setTargetTriple(S);
2799 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
2801 if (ConvertToString(Record, 0, S))
2802 return Error("Invalid record");
2803 TheModule->setDataLayout(S);
2806 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
2808 if (ConvertToString(Record, 0, S))
2809 return Error("Invalid record");
2810 TheModule->setModuleInlineAsm(S);
2813 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
2814 // FIXME: Remove in 4.0.
2816 if (ConvertToString(Record, 0, S))
2817 return Error("Invalid record");
2821 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
2823 if (ConvertToString(Record, 0, S))
2824 return Error("Invalid record");
2825 SectionTable.push_back(S);
2828 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
2830 if (ConvertToString(Record, 0, S))
2831 return Error("Invalid record");
2832 GCTable.push_back(S);
2835 case bitc::MODULE_CODE_COMDAT: { // COMDAT: [selection_kind, name]
2836 if (Record.size() < 2)
2837 return Error("Invalid record");
2838 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
2839 unsigned ComdatNameSize = Record[1];
2840 std::string ComdatName;
2841 ComdatName.reserve(ComdatNameSize);
2842 for (unsigned i = 0; i != ComdatNameSize; ++i)
2843 ComdatName += (char)Record[2 + i];
2844 Comdat *C = TheModule->getOrInsertComdat(ComdatName);
2845 C->setSelectionKind(SK);
2846 ComdatList.push_back(C);
2849 // GLOBALVAR: [pointer type, isconst, initid,
2850 // linkage, alignment, section, visibility, threadlocal,
2851 // unnamed_addr, externally_initialized, dllstorageclass,
2853 case bitc::MODULE_CODE_GLOBALVAR: {
2854 if (Record.size() < 6)
2855 return Error("Invalid record");
2856 Type *Ty = getTypeByID(Record[0]);
2858 return Error("Invalid record");
2859 if (!Ty->isPointerTy())
2860 return Error("Invalid type for value");
2861 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
2862 Ty = cast<PointerType>(Ty)->getElementType();
2864 bool isConstant = Record[1];
2865 uint64_t RawLinkage = Record[3];
2866 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
2868 if (std::error_code EC = parseAlignmentValue(Record[4], Alignment))
2870 std::string Section;
2872 if (Record[5]-1 >= SectionTable.size())
2873 return Error("Invalid ID");
2874 Section = SectionTable[Record[5]-1];
2876 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
2877 // Local linkage must have default visibility.
2878 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
2879 // FIXME: Change to an error if non-default in 4.0.
2880 Visibility = GetDecodedVisibility(Record[6]);
2882 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
2883 if (Record.size() > 7)
2884 TLM = GetDecodedThreadLocalMode(Record[7]);
2886 bool UnnamedAddr = false;
2887 if (Record.size() > 8)
2888 UnnamedAddr = Record[8];
2890 bool ExternallyInitialized = false;
2891 if (Record.size() > 9)
2892 ExternallyInitialized = Record[9];
2894 GlobalVariable *NewGV =
2895 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, "", nullptr,
2896 TLM, AddressSpace, ExternallyInitialized);
2897 NewGV->setAlignment(Alignment);
2898 if (!Section.empty())
2899 NewGV->setSection(Section);
2900 NewGV->setVisibility(Visibility);
2901 NewGV->setUnnamedAddr(UnnamedAddr);
2903 if (Record.size() > 10)
2904 NewGV->setDLLStorageClass(GetDecodedDLLStorageClass(Record[10]));
2906 UpgradeDLLImportExportLinkage(NewGV, RawLinkage);
2908 ValueList.push_back(NewGV);
2910 // Remember which value to use for the global initializer.
2911 if (unsigned InitID = Record[2])
2912 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
2914 if (Record.size() > 11) {
2915 if (unsigned ComdatID = Record[11]) {
2916 assert(ComdatID <= ComdatList.size());
2917 NewGV->setComdat(ComdatList[ComdatID - 1]);
2919 } else if (hasImplicitComdat(RawLinkage)) {
2920 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
2924 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
2925 // alignment, section, visibility, gc, unnamed_addr,
2926 // prologuedata, dllstorageclass, comdat, prefixdata]
2927 case bitc::MODULE_CODE_FUNCTION: {
2928 if (Record.size() < 8)
2929 return Error("Invalid record");
2930 Type *Ty = getTypeByID(Record[0]);
2932 return Error("Invalid record");
2933 if (!Ty->isPointerTy())
2934 return Error("Invalid type for value");
2936 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
2938 return Error("Invalid type for value");
2940 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
2943 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
2944 bool isProto = Record[2];
2945 uint64_t RawLinkage = Record[3];
2946 Func->setLinkage(getDecodedLinkage(RawLinkage));
2947 Func->setAttributes(getAttributes(Record[4]));
2950 if (std::error_code EC = parseAlignmentValue(Record[5], Alignment))
2952 Func->setAlignment(Alignment);
2954 if (Record[6]-1 >= SectionTable.size())
2955 return Error("Invalid ID");
2956 Func->setSection(SectionTable[Record[6]-1]);
2958 // Local linkage must have default visibility.
2959 if (!Func->hasLocalLinkage())
2960 // FIXME: Change to an error if non-default in 4.0.
2961 Func->setVisibility(GetDecodedVisibility(Record[7]));
2962 if (Record.size() > 8 && Record[8]) {
2963 if (Record[8]-1 > GCTable.size())
2964 return Error("Invalid ID");
2965 Func->setGC(GCTable[Record[8]-1].c_str());
2967 bool UnnamedAddr = false;
2968 if (Record.size() > 9)
2969 UnnamedAddr = Record[9];
2970 Func->setUnnamedAddr(UnnamedAddr);
2971 if (Record.size() > 10 && Record[10] != 0)
2972 FunctionPrologues.push_back(std::make_pair(Func, Record[10]-1));
2974 if (Record.size() > 11)
2975 Func->setDLLStorageClass(GetDecodedDLLStorageClass(Record[11]));
2977 UpgradeDLLImportExportLinkage(Func, RawLinkage);
2979 if (Record.size() > 12) {
2980 if (unsigned ComdatID = Record[12]) {
2981 assert(ComdatID <= ComdatList.size());
2982 Func->setComdat(ComdatList[ComdatID - 1]);
2984 } else if (hasImplicitComdat(RawLinkage)) {
2985 Func->setComdat(reinterpret_cast<Comdat *>(1));
2988 if (Record.size() > 13 && Record[13] != 0)
2989 FunctionPrefixes.push_back(std::make_pair(Func, Record[13]-1));
2991 ValueList.push_back(Func);
2993 // If this is a function with a body, remember the prototype we are
2994 // creating now, so that we can match up the body with them later.
2996 Func->setIsMaterializable(true);
2997 FunctionsWithBodies.push_back(Func);
2999 DeferredFunctionInfo[Func] = 0;
3003 // ALIAS: [alias type, aliasee val#, linkage]
3004 // ALIAS: [alias type, aliasee val#, linkage, visibility, dllstorageclass]
3005 case bitc::MODULE_CODE_ALIAS: {
3006 if (Record.size() < 3)
3007 return Error("Invalid record");
3008 Type *Ty = getTypeByID(Record[0]);
3010 return Error("Invalid record");
3011 auto *PTy = dyn_cast<PointerType>(Ty);
3013 return Error("Invalid type for value");
3016 GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
3017 getDecodedLinkage(Record[2]), "", TheModule);
3018 // Old bitcode files didn't have visibility field.
3019 // Local linkage must have default visibility.
3020 if (Record.size() > 3 && !NewGA->hasLocalLinkage())
3021 // FIXME: Change to an error if non-default in 4.0.
3022 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
3023 if (Record.size() > 4)
3024 NewGA->setDLLStorageClass(GetDecodedDLLStorageClass(Record[4]));
3026 UpgradeDLLImportExportLinkage(NewGA, Record[2]);
3027 if (Record.size() > 5)
3028 NewGA->setThreadLocalMode(GetDecodedThreadLocalMode(Record[5]));
3029 if (Record.size() > 6)
3030 NewGA->setUnnamedAddr(Record[6]);
3031 ValueList.push_back(NewGA);
3032 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
3035 /// MODULE_CODE_PURGEVALS: [numvals]
3036 case bitc::MODULE_CODE_PURGEVALS:
3037 // Trim down the value list to the specified size.
3038 if (Record.size() < 1 || Record[0] > ValueList.size())
3039 return Error("Invalid record");
3040 ValueList.shrinkTo(Record[0]);
3047 std::error_code BitcodeReader::ParseBitcodeInto(Module *M,
3048 bool ShouldLazyLoadMetadata) {
3049 TheModule = nullptr;
3051 if (std::error_code EC = InitStream())
3054 // Sniff for the signature.
3055 if (Stream.Read(8) != 'B' ||
3056 Stream.Read(8) != 'C' ||
3057 Stream.Read(4) != 0x0 ||
3058 Stream.Read(4) != 0xC ||
3059 Stream.Read(4) != 0xE ||
3060 Stream.Read(4) != 0xD)
3061 return Error("Invalid bitcode signature");
3063 // We expect a number of well-defined blocks, though we don't necessarily
3064 // need to understand them all.
3066 if (Stream.AtEndOfStream()) {
3068 return std::error_code();
3069 // We didn't really read a proper Module.
3070 return Error("Malformed IR file");
3073 BitstreamEntry Entry =
3074 Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
3076 switch (Entry.Kind) {
3077 case BitstreamEntry::Error:
3078 return Error("Malformed block");
3079 case BitstreamEntry::EndBlock:
3080 return std::error_code();
3082 case BitstreamEntry::SubBlock:
3084 case bitc::BLOCKINFO_BLOCK_ID:
3085 if (Stream.ReadBlockInfoBlock())
3086 return Error("Malformed block");
3088 case bitc::MODULE_BLOCK_ID:
3089 // Reject multiple MODULE_BLOCK's in a single bitstream.
3091 return Error("Invalid multiple blocks");
3093 if (std::error_code EC = ParseModule(false, ShouldLazyLoadMetadata))
3096 return std::error_code();
3099 if (Stream.SkipBlock())
3100 return Error("Invalid record");
3104 case BitstreamEntry::Record:
3105 // There should be no records in the top-level of blocks.
3107 // The ranlib in Xcode 4 will align archive members by appending newlines
3108 // to the end of them. If this file size is a multiple of 4 but not 8, we
3109 // have to read and ignore these final 4 bytes :-(
3110 if (Stream.getAbbrevIDWidth() == 2 && Entry.ID == 2 &&
3111 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
3112 Stream.AtEndOfStream())
3113 return std::error_code();
3115 return Error("Invalid record");
3120 ErrorOr<std::string> BitcodeReader::parseModuleTriple() {
3121 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
3122 return Error("Invalid record");
3124 SmallVector<uint64_t, 64> Record;
3127 // Read all the records for this module.
3129 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
3131 switch (Entry.Kind) {
3132 case BitstreamEntry::SubBlock: // Handled for us already.
3133 case BitstreamEntry::Error:
3134 return Error("Malformed block");
3135 case BitstreamEntry::EndBlock:
3137 case BitstreamEntry::Record:
3138 // The interesting case.
3143 switch (Stream.readRecord(Entry.ID, Record)) {
3144 default: break; // Default behavior, ignore unknown content.
3145 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
3147 if (ConvertToString(Record, 0, S))
3148 return Error("Invalid record");
3155 llvm_unreachable("Exit infinite loop");
3158 ErrorOr<std::string> BitcodeReader::parseTriple() {
3159 if (std::error_code EC = InitStream())
3162 // Sniff for the signature.
3163 if (Stream.Read(8) != 'B' ||
3164 Stream.Read(8) != 'C' ||
3165 Stream.Read(4) != 0x0 ||
3166 Stream.Read(4) != 0xC ||
3167 Stream.Read(4) != 0xE ||
3168 Stream.Read(4) != 0xD)
3169 return Error("Invalid bitcode signature");
3171 // We expect a number of well-defined blocks, though we don't necessarily
3172 // need to understand them all.
3174 BitstreamEntry Entry = Stream.advance();
3176 switch (Entry.Kind) {
3177 case BitstreamEntry::Error:
3178 return Error("Malformed block");
3179 case BitstreamEntry::EndBlock:
3180 return std::error_code();
3182 case BitstreamEntry::SubBlock:
3183 if (Entry.ID == bitc::MODULE_BLOCK_ID)
3184 return parseModuleTriple();
3186 // Ignore other sub-blocks.
3187 if (Stream.SkipBlock())
3188 return Error("Malformed block");
3191 case BitstreamEntry::Record:
3192 Stream.skipRecord(Entry.ID);
3198 /// ParseMetadataAttachment - Parse metadata attachments.
3199 std::error_code BitcodeReader::ParseMetadataAttachment() {
3200 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
3201 return Error("Invalid record");
3203 SmallVector<uint64_t, 64> Record;
3205 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
3207 switch (Entry.Kind) {
3208 case BitstreamEntry::SubBlock: // Handled for us already.
3209 case BitstreamEntry::Error:
3210 return Error("Malformed block");
3211 case BitstreamEntry::EndBlock:
3212 return std::error_code();
3213 case BitstreamEntry::Record:
3214 // The interesting case.
3218 // Read a metadata attachment record.
3220 switch (Stream.readRecord(Entry.ID, Record)) {
3221 default: // Default behavior: ignore.
3223 case bitc::METADATA_ATTACHMENT: {
3224 unsigned RecordLength = Record.size();
3225 if (Record.empty() || (RecordLength - 1) % 2 == 1)
3226 return Error("Invalid record");
3227 Instruction *Inst = InstructionList[Record[0]];
3228 for (unsigned i = 1; i != RecordLength; i = i+2) {
3229 unsigned Kind = Record[i];
3230 DenseMap<unsigned, unsigned>::iterator I =
3231 MDKindMap.find(Kind);
3232 if (I == MDKindMap.end())
3233 return Error("Invalid ID");
3234 Metadata *Node = MDValueList.getValueFwdRef(Record[i + 1]);
3235 if (isa<LocalAsMetadata>(Node))
3236 // Drop the attachment. This used to be legal, but there's no
3239 Inst->setMetadata(I->second, cast<MDNode>(Node));
3240 if (I->second == LLVMContext::MD_tbaa)
3241 InstsWithTBAATag.push_back(Inst);
3249 /// ParseFunctionBody - Lazily parse the specified function body block.
3250 std::error_code BitcodeReader::ParseFunctionBody(Function *F) {
3251 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
3252 return Error("Invalid record");
3254 InstructionList.clear();
3255 unsigned ModuleValueListSize = ValueList.size();
3256 unsigned ModuleMDValueListSize = MDValueList.size();
3258 // Add all the function arguments to the value table.
3259 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
3260 ValueList.push_back(I);
3262 unsigned NextValueNo = ValueList.size();
3263 BasicBlock *CurBB = nullptr;
3264 unsigned CurBBNo = 0;
3267 auto getLastInstruction = [&]() -> Instruction * {
3268 if (CurBB && !CurBB->empty())
3269 return &CurBB->back();
3270 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
3271 !FunctionBBs[CurBBNo - 1]->empty())
3272 return &FunctionBBs[CurBBNo - 1]->back();
3276 // Read all the records.
3277 SmallVector<uint64_t, 64> Record;
3279 BitstreamEntry Entry = Stream.advance();
3281 switch (Entry.Kind) {
3282 case BitstreamEntry::Error:
3283 return Error("Malformed block");
3284 case BitstreamEntry::EndBlock:
3285 goto OutOfRecordLoop;
3287 case BitstreamEntry::SubBlock:
3289 default: // Skip unknown content.
3290 if (Stream.SkipBlock())
3291 return Error("Invalid record");
3293 case bitc::CONSTANTS_BLOCK_ID:
3294 if (std::error_code EC = ParseConstants())
3296 NextValueNo = ValueList.size();
3298 case bitc::VALUE_SYMTAB_BLOCK_ID:
3299 if (std::error_code EC = ParseValueSymbolTable())
3302 case bitc::METADATA_ATTACHMENT_ID:
3303 if (std::error_code EC = ParseMetadataAttachment())
3306 case bitc::METADATA_BLOCK_ID:
3307 if (std::error_code EC = ParseMetadata())
3310 case bitc::USELIST_BLOCK_ID:
3311 if (std::error_code EC = ParseUseLists())
3317 case BitstreamEntry::Record:
3318 // The interesting case.
3324 Instruction *I = nullptr;
3325 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
3327 default: // Default behavior: reject
3328 return Error("Invalid value");
3329 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
3330 if (Record.size() < 1 || Record[0] == 0)
3331 return Error("Invalid record");
3332 // Create all the basic blocks for the function.
3333 FunctionBBs.resize(Record[0]);
3335 // See if anything took the address of blocks in this function.
3336 auto BBFRI = BasicBlockFwdRefs.find(F);
3337 if (BBFRI == BasicBlockFwdRefs.end()) {
3338 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
3339 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
3341 auto &BBRefs = BBFRI->second;
3342 // Check for invalid basic block references.
3343 if (BBRefs.size() > FunctionBBs.size())
3344 return Error("Invalid ID");
3345 assert(!BBRefs.empty() && "Unexpected empty array");
3346 assert(!BBRefs.front() && "Invalid reference to entry block");
3347 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
3349 if (I < RE && BBRefs[I]) {
3350 BBRefs[I]->insertInto(F);
3351 FunctionBBs[I] = BBRefs[I];
3353 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3356 // Erase from the table.
3357 BasicBlockFwdRefs.erase(BBFRI);
3360 CurBB = FunctionBBs[0];
3364 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3365 // This record indicates that the last instruction is at the same
3366 // location as the previous instruction with a location.
3367 I = getLastInstruction();
3370 return Error("Invalid record");
3371 I->setDebugLoc(LastLoc);
3375 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3376 I = getLastInstruction();
3377 if (!I || Record.size() < 4)
3378 return Error("Invalid record");
3380 unsigned Line = Record[0], Col = Record[1];
3381 unsigned ScopeID = Record[2], IAID = Record[3];
3383 MDNode *Scope = nullptr, *IA = nullptr;
3384 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
3385 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
3386 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
3387 I->setDebugLoc(LastLoc);
3392 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
3395 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3396 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3397 OpNum+1 > Record.size())
3398 return Error("Invalid record");
3400 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
3402 return Error("Invalid record");
3403 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3404 InstructionList.push_back(I);
3405 if (OpNum < Record.size()) {
3406 if (Opc == Instruction::Add ||
3407 Opc == Instruction::Sub ||
3408 Opc == Instruction::Mul ||
3409 Opc == Instruction::Shl) {
3410 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
3411 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
3412 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
3413 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
3414 } else if (Opc == Instruction::SDiv ||
3415 Opc == Instruction::UDiv ||
3416 Opc == Instruction::LShr ||
3417 Opc == Instruction::AShr) {
3418 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
3419 cast<BinaryOperator>(I)->setIsExact(true);
3420 } else if (isa<FPMathOperator>(I)) {
3422 if (0 != (Record[OpNum] & FastMathFlags::UnsafeAlgebra))
3423 FMF.setUnsafeAlgebra();
3424 if (0 != (Record[OpNum] & FastMathFlags::NoNaNs))
3426 if (0 != (Record[OpNum] & FastMathFlags::NoInfs))
3428 if (0 != (Record[OpNum] & FastMathFlags::NoSignedZeros))
3429 FMF.setNoSignedZeros();
3430 if (0 != (Record[OpNum] & FastMathFlags::AllowReciprocal))
3431 FMF.setAllowReciprocal();
3433 I->setFastMathFlags(FMF);
3439 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
3442 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3443 OpNum+2 != Record.size())
3444 return Error("Invalid record");
3446 Type *ResTy = getTypeByID(Record[OpNum]);
3447 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
3448 if (Opc == -1 || !ResTy)
3449 return Error("Invalid record");
3450 Instruction *Temp = nullptr;
3451 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
3453 InstructionList.push_back(Temp);
3454 CurBB->getInstList().push_back(Temp);
3457 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
3459 InstructionList.push_back(I);
3462 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
3463 case bitc::FUNC_CODE_INST_GEP_OLD:
3464 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
3470 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
3471 InBounds = Record[OpNum++];
3472 Ty = getTypeByID(Record[OpNum++]);
3474 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
3479 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
3480 return Error("Invalid record");
3484 cast<SequentialType>(BasePtr->getType()->getScalarType())
3487 "Explicit gep type does not match pointee type of pointer operand");
3489 SmallVector<Value*, 16> GEPIdx;
3490 while (OpNum != Record.size()) {
3492 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3493 return Error("Invalid record");
3494 GEPIdx.push_back(Op);
3497 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
3499 InstructionList.push_back(I);
3501 cast<GetElementPtrInst>(I)->setIsInBounds(true);
3505 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
3506 // EXTRACTVAL: [opty, opval, n x indices]
3509 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3510 return Error("Invalid record");
3512 SmallVector<unsigned, 4> EXTRACTVALIdx;
3513 Type *CurTy = Agg->getType();
3514 for (unsigned RecSize = Record.size();
3515 OpNum != RecSize; ++OpNum) {
3516 bool IsArray = CurTy->isArrayTy();
3517 bool IsStruct = CurTy->isStructTy();
3518 uint64_t Index = Record[OpNum];
3520 if (!IsStruct && !IsArray)
3521 return Error("EXTRACTVAL: Invalid type");
3522 if ((unsigned)Index != Index)
3523 return Error("Invalid value");
3524 if (IsStruct && Index >= CurTy->subtypes().size())
3525 return Error("EXTRACTVAL: Invalid struct index");
3526 if (IsArray && Index >= CurTy->getArrayNumElements())
3527 return Error("EXTRACTVAL: Invalid array index");
3528 EXTRACTVALIdx.push_back((unsigned)Index);
3531 CurTy = CurTy->subtypes()[Index];
3533 CurTy = CurTy->subtypes()[0];
3536 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
3537 InstructionList.push_back(I);
3541 case bitc::FUNC_CODE_INST_INSERTVAL: {
3542 // INSERTVAL: [opty, opval, opty, opval, n x indices]
3545 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3546 return Error("Invalid record");
3548 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
3549 return Error("Invalid record");
3551 SmallVector<unsigned, 4> INSERTVALIdx;
3552 Type *CurTy = Agg->getType();
3553 for (unsigned RecSize = Record.size();
3554 OpNum != RecSize; ++OpNum) {
3555 bool IsArray = CurTy->isArrayTy();
3556 bool IsStruct = CurTy->isStructTy();
3557 uint64_t Index = Record[OpNum];
3559 if (!IsStruct && !IsArray)
3560 return Error("INSERTVAL: Invalid type");
3561 if (!CurTy->isStructTy() && !CurTy->isArrayTy())
3562 return Error("Invalid type");
3563 if ((unsigned)Index != Index)
3564 return Error("Invalid value");
3565 if (IsStruct && Index >= CurTy->subtypes().size())
3566 return Error("INSERTVAL: Invalid struct index");
3567 if (IsArray && Index >= CurTy->getArrayNumElements())
3568 return Error("INSERTVAL: Invalid array index");
3570 INSERTVALIdx.push_back((unsigned)Index);
3572 CurTy = CurTy->subtypes()[Index];
3574 CurTy = CurTy->subtypes()[0];
3577 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
3578 InstructionList.push_back(I);
3582 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
3583 // obsolete form of select
3584 // handles select i1 ... in old bitcode
3586 Value *TrueVal, *FalseVal, *Cond;
3587 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3588 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3589 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
3590 return Error("Invalid record");
3592 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3593 InstructionList.push_back(I);
3597 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
3598 // new form of select
3599 // handles select i1 or select [N x i1]
3601 Value *TrueVal, *FalseVal, *Cond;
3602 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3603 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3604 getValueTypePair(Record, OpNum, NextValueNo, Cond))
3605 return Error("Invalid record");
3607 // select condition can be either i1 or [N x i1]
3608 if (VectorType* vector_type =
3609 dyn_cast<VectorType>(Cond->getType())) {
3611 if (vector_type->getElementType() != Type::getInt1Ty(Context))
3612 return Error("Invalid type for value");
3615 if (Cond->getType() != Type::getInt1Ty(Context))
3616 return Error("Invalid type for value");
3619 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3620 InstructionList.push_back(I);
3624 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
3627 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
3628 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3629 return Error("Invalid record");
3630 I = ExtractElementInst::Create(Vec, Idx);
3631 InstructionList.push_back(I);
3635 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
3637 Value *Vec, *Elt, *Idx;
3638 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
3639 popValue(Record, OpNum, NextValueNo,
3640 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
3641 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3642 return Error("Invalid record");
3643 I = InsertElementInst::Create(Vec, Elt, Idx);
3644 InstructionList.push_back(I);
3648 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
3650 Value *Vec1, *Vec2, *Mask;
3651 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
3652 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
3653 return Error("Invalid record");
3655 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
3656 return Error("Invalid record");
3657 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
3658 InstructionList.push_back(I);
3662 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
3663 // Old form of ICmp/FCmp returning bool
3664 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
3665 // both legal on vectors but had different behaviour.
3666 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
3667 // FCmp/ICmp returning bool or vector of bool
3671 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3672 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3673 OpNum+1 != Record.size())
3674 return Error("Invalid record");
3676 if (LHS->getType()->isFPOrFPVectorTy())
3677 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
3679 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
3680 InstructionList.push_back(I);
3684 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
3686 unsigned Size = Record.size();
3688 I = ReturnInst::Create(Context);
3689 InstructionList.push_back(I);
3694 Value *Op = nullptr;
3695 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3696 return Error("Invalid record");
3697 if (OpNum != Record.size())
3698 return Error("Invalid record");
3700 I = ReturnInst::Create(Context, Op);
3701 InstructionList.push_back(I);
3704 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
3705 if (Record.size() != 1 && Record.size() != 3)
3706 return Error("Invalid record");
3707 BasicBlock *TrueDest = getBasicBlock(Record[0]);
3709 return Error("Invalid record");
3711 if (Record.size() == 1) {
3712 I = BranchInst::Create(TrueDest);
3713 InstructionList.push_back(I);
3716 BasicBlock *FalseDest = getBasicBlock(Record[1]);
3717 Value *Cond = getValue(Record, 2, NextValueNo,
3718 Type::getInt1Ty(Context));
3719 if (!FalseDest || !Cond)
3720 return Error("Invalid record");
3721 I = BranchInst::Create(TrueDest, FalseDest, Cond);
3722 InstructionList.push_back(I);
3726 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
3728 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
3729 // "New" SwitchInst format with case ranges. The changes to write this
3730 // format were reverted but we still recognize bitcode that uses it.
3731 // Hopefully someday we will have support for case ranges and can use
3732 // this format again.
3734 Type *OpTy = getTypeByID(Record[1]);
3735 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
3737 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
3738 BasicBlock *Default = getBasicBlock(Record[3]);
3739 if (!OpTy || !Cond || !Default)
3740 return Error("Invalid record");
3742 unsigned NumCases = Record[4];
3744 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3745 InstructionList.push_back(SI);
3747 unsigned CurIdx = 5;
3748 for (unsigned i = 0; i != NumCases; ++i) {
3749 SmallVector<ConstantInt*, 1> CaseVals;
3750 unsigned NumItems = Record[CurIdx++];
3751 for (unsigned ci = 0; ci != NumItems; ++ci) {
3752 bool isSingleNumber = Record[CurIdx++];
3755 unsigned ActiveWords = 1;
3756 if (ValueBitWidth > 64)
3757 ActiveWords = Record[CurIdx++];
3758 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
3760 CurIdx += ActiveWords;
3762 if (!isSingleNumber) {
3764 if (ValueBitWidth > 64)
3765 ActiveWords = Record[CurIdx++];
3767 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
3769 CurIdx += ActiveWords;
3771 // FIXME: It is not clear whether values in the range should be
3772 // compared as signed or unsigned values. The partially
3773 // implemented changes that used this format in the past used
3774 // unsigned comparisons.
3775 for ( ; Low.ule(High); ++Low)
3776 CaseVals.push_back(ConstantInt::get(Context, Low));
3778 CaseVals.push_back(ConstantInt::get(Context, Low));
3780 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
3781 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
3782 cve = CaseVals.end(); cvi != cve; ++cvi)
3783 SI->addCase(*cvi, DestBB);
3789 // Old SwitchInst format without case ranges.
3791 if (Record.size() < 3 || (Record.size() & 1) == 0)
3792 return Error("Invalid record");
3793 Type *OpTy = getTypeByID(Record[0]);
3794 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
3795 BasicBlock *Default = getBasicBlock(Record[2]);
3796 if (!OpTy || !Cond || !Default)
3797 return Error("Invalid record");
3798 unsigned NumCases = (Record.size()-3)/2;
3799 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3800 InstructionList.push_back(SI);
3801 for (unsigned i = 0, e = NumCases; i != e; ++i) {
3802 ConstantInt *CaseVal =
3803 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
3804 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
3805 if (!CaseVal || !DestBB) {
3807 return Error("Invalid record");
3809 SI->addCase(CaseVal, DestBB);
3814 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
3815 if (Record.size() < 2)
3816 return Error("Invalid record");
3817 Type *OpTy = getTypeByID(Record[0]);
3818 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
3819 if (!OpTy || !Address)
3820 return Error("Invalid record");
3821 unsigned NumDests = Record.size()-2;
3822 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
3823 InstructionList.push_back(IBI);
3824 for (unsigned i = 0, e = NumDests; i != e; ++i) {
3825 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
3826 IBI->addDestination(DestBB);
3829 return Error("Invalid record");
3836 case bitc::FUNC_CODE_INST_INVOKE: {
3837 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
3838 if (Record.size() < 4)
3839 return Error("Invalid record");
3840 AttributeSet PAL = getAttributes(Record[0]);
3841 unsigned CCInfo = Record[1];
3842 BasicBlock *NormalBB = getBasicBlock(Record[2]);
3843 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
3847 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
3848 return Error("Invalid record");
3850 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
3851 FunctionType *FTy = !CalleeTy ? nullptr :
3852 dyn_cast<FunctionType>(CalleeTy->getElementType());
3854 // Check that the right number of fixed parameters are here.
3855 if (!FTy || !NormalBB || !UnwindBB ||
3856 Record.size() < OpNum+FTy->getNumParams())
3857 return Error("Invalid record");
3859 SmallVector<Value*, 16> Ops;
3860 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
3861 Ops.push_back(getValue(Record, OpNum, NextValueNo,
3862 FTy->getParamType(i)));
3864 return Error("Invalid record");
3867 if (!FTy->isVarArg()) {
3868 if (Record.size() != OpNum)
3869 return Error("Invalid record");
3871 // Read type/value pairs for varargs params.
3872 while (OpNum != Record.size()) {
3874 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3875 return Error("Invalid record");
3880 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
3881 InstructionList.push_back(I);
3882 cast<InvokeInst>(I)->setCallingConv(
3883 static_cast<CallingConv::ID>(CCInfo));
3884 cast<InvokeInst>(I)->setAttributes(PAL);
3887 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
3889 Value *Val = nullptr;
3890 if (getValueTypePair(Record, Idx, NextValueNo, Val))
3891 return Error("Invalid record");
3892 I = ResumeInst::Create(Val);
3893 InstructionList.push_back(I);
3896 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
3897 I = new UnreachableInst(Context);
3898 InstructionList.push_back(I);
3900 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
3901 if (Record.size() < 1 || ((Record.size()-1)&1))
3902 return Error("Invalid record");
3903 Type *Ty = getTypeByID(Record[0]);
3905 return Error("Invalid record");
3907 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
3908 InstructionList.push_back(PN);
3910 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
3912 // With the new function encoding, it is possible that operands have
3913 // negative IDs (for forward references). Use a signed VBR
3914 // representation to keep the encoding small.
3916 V = getValueSigned(Record, 1+i, NextValueNo, Ty);
3918 V = getValue(Record, 1+i, NextValueNo, Ty);
3919 BasicBlock *BB = getBasicBlock(Record[2+i]);
3921 return Error("Invalid record");
3922 PN->addIncoming(V, BB);
3928 case bitc::FUNC_CODE_INST_LANDINGPAD: {
3929 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
3931 if (Record.size() < 4)
3932 return Error("Invalid record");
3933 Type *Ty = getTypeByID(Record[Idx++]);
3935 return Error("Invalid record");
3936 Value *PersFn = nullptr;
3937 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
3938 return Error("Invalid record");
3940 bool IsCleanup = !!Record[Idx++];
3941 unsigned NumClauses = Record[Idx++];
3942 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
3943 LP->setCleanup(IsCleanup);
3944 for (unsigned J = 0; J != NumClauses; ++J) {
3945 LandingPadInst::ClauseType CT =
3946 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
3949 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
3951 return Error("Invalid record");
3954 assert((CT != LandingPadInst::Catch ||
3955 !isa<ArrayType>(Val->getType())) &&
3956 "Catch clause has a invalid type!");
3957 assert((CT != LandingPadInst::Filter ||
3958 isa<ArrayType>(Val->getType())) &&
3959 "Filter clause has invalid type!");
3960 LP->addClause(cast<Constant>(Val));
3964 InstructionList.push_back(I);
3968 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
3969 if (Record.size() != 4)
3970 return Error("Invalid record");
3972 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
3973 Type *OpTy = getTypeByID(Record[1]);
3974 Value *Size = getFnValueByID(Record[2], OpTy);
3975 uint64_t AlignRecord = Record[3];
3976 const uint64_t InAllocaMask = uint64_t(1) << 5;
3977 bool InAlloca = AlignRecord & InAllocaMask;
3979 if (std::error_code EC =
3980 parseAlignmentValue(AlignRecord & ~InAllocaMask, Align)) {
3984 return Error("Invalid record");
3985 AllocaInst *AI = new AllocaInst(Ty->getElementType(), Size, Align);
3986 AI->setUsedWithInAlloca(InAlloca);
3988 InstructionList.push_back(I);
3991 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
3994 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3995 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
3996 return Error("Invalid record");
3999 if (OpNum + 3 == Record.size())
4000 Ty = getTypeByID(Record[OpNum++]);
4003 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4005 I = new LoadInst(Op, "", Record[OpNum+1], Align);
4007 if (Ty && Ty != I->getType())
4008 return Error("Explicit load type does not match pointee type of "
4011 InstructionList.push_back(I);
4014 case bitc::FUNC_CODE_INST_LOADATOMIC: {
4015 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
4018 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
4019 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
4020 return Error("Invalid record");
4023 if (OpNum + 5 == Record.size())
4024 Ty = getTypeByID(Record[OpNum++]);
4026 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
4027 if (Ordering == NotAtomic || Ordering == Release ||
4028 Ordering == AcquireRelease)
4029 return Error("Invalid record");
4030 if (Ordering != NotAtomic && Record[OpNum] == 0)
4031 return Error("Invalid record");
4032 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
4035 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4037 I = new LoadInst(Op, "", Record[OpNum+1], Align, Ordering, SynchScope);
4040 assert((!Ty || Ty == I->getType()) &&
4041 "Explicit type doesn't match pointee type of the first operand");
4043 InstructionList.push_back(I);
4046 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
4049 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4050 popValue(Record, OpNum, NextValueNo,
4051 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
4052 OpNum+2 != Record.size())
4053 return Error("Invalid record");
4055 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4057 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align);
4058 InstructionList.push_back(I);
4061 case bitc::FUNC_CODE_INST_STOREATOMIC: {
4062 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
4065 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4066 popValue(Record, OpNum, NextValueNo,
4067 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
4068 OpNum+4 != Record.size())
4069 return Error("Invalid record");
4071 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
4072 if (Ordering == NotAtomic || Ordering == Acquire ||
4073 Ordering == AcquireRelease)
4074 return Error("Invalid record");
4075 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
4076 if (Ordering != NotAtomic && Record[OpNum] == 0)
4077 return Error("Invalid record");
4080 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
4082 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align, Ordering, SynchScope);
4083 InstructionList.push_back(I);
4086 case bitc::FUNC_CODE_INST_CMPXCHG: {
4087 // CMPXCHG:[ptrty, ptr, cmp, new, vol, successordering, synchscope,
4088 // failureordering?, isweak?]
4090 Value *Ptr, *Cmp, *New;
4091 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4092 popValue(Record, OpNum, NextValueNo,
4093 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
4094 popValue(Record, OpNum, NextValueNo,
4095 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
4096 (Record.size() < OpNum + 3 || Record.size() > OpNum + 5))
4097 return Error("Invalid record");
4098 AtomicOrdering SuccessOrdering = GetDecodedOrdering(Record[OpNum+1]);
4099 if (SuccessOrdering == NotAtomic || SuccessOrdering == Unordered)
4100 return Error("Invalid record");
4101 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
4103 AtomicOrdering FailureOrdering;
4104 if (Record.size() < 7)
4106 AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering);
4108 FailureOrdering = GetDecodedOrdering(Record[OpNum+3]);
4110 I = new AtomicCmpXchgInst(Ptr, Cmp, New, SuccessOrdering, FailureOrdering,
4112 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
4114 if (Record.size() < 8) {
4115 // Before weak cmpxchgs existed, the instruction simply returned the
4116 // value loaded from memory, so bitcode files from that era will be
4117 // expecting the first component of a modern cmpxchg.
4118 CurBB->getInstList().push_back(I);
4119 I = ExtractValueInst::Create(I, 0);
4121 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum+4]);
4124 InstructionList.push_back(I);
4127 case bitc::FUNC_CODE_INST_ATOMICRMW: {
4128 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
4131 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
4132 popValue(Record, OpNum, NextValueNo,
4133 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
4134 OpNum+4 != Record.size())
4135 return Error("Invalid record");
4136 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
4137 if (Operation < AtomicRMWInst::FIRST_BINOP ||
4138 Operation > AtomicRMWInst::LAST_BINOP)
4139 return Error("Invalid record");
4140 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
4141 if (Ordering == NotAtomic || Ordering == Unordered)
4142 return Error("Invalid record");
4143 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
4144 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
4145 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
4146 InstructionList.push_back(I);
4149 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
4150 if (2 != Record.size())
4151 return Error("Invalid record");
4152 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
4153 if (Ordering == NotAtomic || Ordering == Unordered ||
4154 Ordering == Monotonic)
4155 return Error("Invalid record");
4156 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
4157 I = new FenceInst(Context, Ordering, SynchScope);
4158 InstructionList.push_back(I);
4161 case bitc::FUNC_CODE_INST_CALL: {
4162 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
4163 if (Record.size() < 3)
4164 return Error("Invalid record");
4166 AttributeSet PAL = getAttributes(Record[0]);
4167 unsigned CCInfo = Record[1];
4171 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
4172 return Error("Invalid record");
4174 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
4175 FunctionType *FTy = nullptr;
4176 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
4177 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
4178 return Error("Invalid record");
4180 SmallVector<Value*, 16> Args;
4181 // Read the fixed params.
4182 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
4183 if (FTy->getParamType(i)->isLabelTy())
4184 Args.push_back(getBasicBlock(Record[OpNum]));
4186 Args.push_back(getValue(Record, OpNum, NextValueNo,
4187 FTy->getParamType(i)));
4189 return Error("Invalid record");
4192 // Read type/value pairs for varargs params.
4193 if (!FTy->isVarArg()) {
4194 if (OpNum != Record.size())
4195 return Error("Invalid record");
4197 while (OpNum != Record.size()) {
4199 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
4200 return Error("Invalid record");
4205 I = CallInst::Create(Callee, Args);
4206 InstructionList.push_back(I);
4207 cast<CallInst>(I)->setCallingConv(
4208 static_cast<CallingConv::ID>((~(1U << 14) & CCInfo) >> 1));
4209 CallInst::TailCallKind TCK = CallInst::TCK_None;
4211 TCK = CallInst::TCK_Tail;
4212 if (CCInfo & (1 << 14))
4213 TCK = CallInst::TCK_MustTail;
4214 cast<CallInst>(I)->setTailCallKind(TCK);
4215 cast<CallInst>(I)->setAttributes(PAL);
4218 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
4219 if (Record.size() < 3)
4220 return Error("Invalid record");
4221 Type *OpTy = getTypeByID(Record[0]);
4222 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
4223 Type *ResTy = getTypeByID(Record[2]);
4224 if (!OpTy || !Op || !ResTy)
4225 return Error("Invalid record");
4226 I = new VAArgInst(Op, ResTy);
4227 InstructionList.push_back(I);
4232 // Add instruction to end of current BB. If there is no current BB, reject
4236 return Error("Invalid instruction with no BB");
4238 CurBB->getInstList().push_back(I);
4240 // If this was a terminator instruction, move to the next block.
4241 if (isa<TerminatorInst>(I)) {
4243 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
4246 // Non-void values get registered in the value table for future use.
4247 if (I && !I->getType()->isVoidTy())
4248 ValueList.AssignValue(I, NextValueNo++);
4253 // Check the function list for unresolved values.
4254 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
4255 if (!A->getParent()) {
4256 // We found at least one unresolved value. Nuke them all to avoid leaks.
4257 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
4258 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
4259 A->replaceAllUsesWith(UndefValue::get(A->getType()));
4263 return Error("Never resolved value found in function");
4267 // FIXME: Check for unresolved forward-declared metadata references
4268 // and clean up leaks.
4270 // Trim the value list down to the size it was before we parsed this function.
4271 ValueList.shrinkTo(ModuleValueListSize);
4272 MDValueList.shrinkTo(ModuleMDValueListSize);
4273 std::vector<BasicBlock*>().swap(FunctionBBs);
4274 return std::error_code();
4277 /// Find the function body in the bitcode stream
4278 std::error_code BitcodeReader::FindFunctionInStream(
4280 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
4281 while (DeferredFunctionInfoIterator->second == 0) {
4282 if (Stream.AtEndOfStream())
4283 return Error("Could not find function in stream");
4284 // ParseModule will parse the next body in the stream and set its
4285 // position in the DeferredFunctionInfo map.
4286 if (std::error_code EC = ParseModule(true))
4289 return std::error_code();
4292 //===----------------------------------------------------------------------===//
4293 // GVMaterializer implementation
4294 //===----------------------------------------------------------------------===//
4296 void BitcodeReader::releaseBuffer() { Buffer.release(); }
4298 std::error_code BitcodeReader::materialize(GlobalValue *GV) {
4299 if (std::error_code EC = materializeMetadata())
4302 Function *F = dyn_cast<Function>(GV);
4303 // If it's not a function or is already material, ignore the request.
4304 if (!F || !F->isMaterializable())
4305 return std::error_code();
4307 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
4308 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
4309 // If its position is recorded as 0, its body is somewhere in the stream
4310 // but we haven't seen it yet.
4311 if (DFII->second == 0 && LazyStreamer)
4312 if (std::error_code EC = FindFunctionInStream(F, DFII))
4315 // Move the bit stream to the saved position of the deferred function body.
4316 Stream.JumpToBit(DFII->second);
4318 if (std::error_code EC = ParseFunctionBody(F))
4320 F->setIsMaterializable(false);
4325 // Upgrade any old intrinsic calls in the function.
4326 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
4327 E = UpgradedIntrinsics.end(); I != E; ++I) {
4328 if (I->first != I->second) {
4329 for (auto UI = I->first->user_begin(), UE = I->first->user_end();
4331 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
4332 UpgradeIntrinsicCall(CI, I->second);
4337 // Bring in any functions that this function forward-referenced via
4339 return materializeForwardReferencedFunctions();
4342 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
4343 const Function *F = dyn_cast<Function>(GV);
4344 if (!F || F->isDeclaration())
4347 // Dematerializing F would leave dangling references that wouldn't be
4348 // reconnected on re-materialization.
4349 if (BlockAddressesTaken.count(F))
4352 return DeferredFunctionInfo.count(const_cast<Function*>(F));
4355 void BitcodeReader::Dematerialize(GlobalValue *GV) {
4356 Function *F = dyn_cast<Function>(GV);
4357 // If this function isn't dematerializable, this is a noop.
4358 if (!F || !isDematerializable(F))
4361 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
4363 // Just forget the function body, we can remat it later.
4364 F->dropAllReferences();
4365 F->setIsMaterializable(true);
4368 std::error_code BitcodeReader::MaterializeModule(Module *M) {
4369 assert(M == TheModule &&
4370 "Can only Materialize the Module this BitcodeReader is attached to.");
4372 if (std::error_code EC = materializeMetadata())
4375 // Promise to materialize all forward references.
4376 WillMaterializeAllForwardRefs = true;
4378 // Iterate over the module, deserializing any functions that are still on
4380 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
4382 if (std::error_code EC = materialize(F))
4385 // At this point, if there are any function bodies, the current bit is
4386 // pointing to the END_BLOCK record after them. Now make sure the rest
4387 // of the bits in the module have been read.
4391 // Check that all block address forward references got resolved (as we
4393 if (!BasicBlockFwdRefs.empty())
4394 return Error("Never resolved function from blockaddress");
4396 // Upgrade any intrinsic calls that slipped through (should not happen!) and
4397 // delete the old functions to clean up. We can't do this unless the entire
4398 // module is materialized because there could always be another function body
4399 // with calls to the old function.
4400 for (std::vector<std::pair<Function*, Function*> >::iterator I =
4401 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
4402 if (I->first != I->second) {
4403 for (auto UI = I->first->user_begin(), UE = I->first->user_end();
4405 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
4406 UpgradeIntrinsicCall(CI, I->second);
4408 if (!I->first->use_empty())
4409 I->first->replaceAllUsesWith(I->second);
4410 I->first->eraseFromParent();
4413 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
4415 for (unsigned I = 0, E = InstsWithTBAATag.size(); I < E; I++)
4416 UpgradeInstWithTBAATag(InstsWithTBAATag[I]);
4418 UpgradeDebugInfo(*M);
4419 return std::error_code();
4422 std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
4423 return IdentifiedStructTypes;
4426 std::error_code BitcodeReader::InitStream() {
4428 return InitLazyStream();
4429 return InitStreamFromBuffer();
4432 std::error_code BitcodeReader::InitStreamFromBuffer() {
4433 const unsigned char *BufPtr = (const unsigned char*)Buffer->getBufferStart();
4434 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
4436 if (Buffer->getBufferSize() & 3)
4437 return Error("Invalid bitcode signature");
4439 // If we have a wrapper header, parse it and ignore the non-bc file contents.
4440 // The magic number is 0x0B17C0DE stored in little endian.
4441 if (isBitcodeWrapper(BufPtr, BufEnd))
4442 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
4443 return Error("Invalid bitcode wrapper header");
4445 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
4446 Stream.init(&*StreamFile);
4448 return std::error_code();
4451 std::error_code BitcodeReader::InitLazyStream() {
4452 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
4454 auto OwnedBytes = llvm::make_unique<StreamingMemoryObject>(LazyStreamer);
4455 StreamingMemoryObject &Bytes = *OwnedBytes;
4456 StreamFile = llvm::make_unique<BitstreamReader>(std::move(OwnedBytes));
4457 Stream.init(&*StreamFile);
4459 unsigned char buf[16];
4460 if (Bytes.readBytes(buf, 16, 0) != 16)
4461 return Error("Invalid bitcode signature");
4463 if (!isBitcode(buf, buf + 16))
4464 return Error("Invalid bitcode signature");
4466 if (isBitcodeWrapper(buf, buf + 4)) {
4467 const unsigned char *bitcodeStart = buf;
4468 const unsigned char *bitcodeEnd = buf + 16;
4469 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
4470 Bytes.dropLeadingBytes(bitcodeStart - buf);
4471 Bytes.setKnownObjectSize(bitcodeEnd - bitcodeStart);
4473 return std::error_code();
4477 class BitcodeErrorCategoryType : public std::error_category {
4478 const char *name() const LLVM_NOEXCEPT override {
4479 return "llvm.bitcode";
4481 std::string message(int IE) const override {
4482 BitcodeError E = static_cast<BitcodeError>(IE);
4484 case BitcodeError::InvalidBitcodeSignature:
4485 return "Invalid bitcode signature";
4486 case BitcodeError::CorruptedBitcode:
4487 return "Corrupted bitcode";
4489 llvm_unreachable("Unknown error type!");
4494 static ManagedStatic<BitcodeErrorCategoryType> ErrorCategory;
4496 const std::error_category &llvm::BitcodeErrorCategory() {
4497 return *ErrorCategory;
4500 //===----------------------------------------------------------------------===//
4501 // External interface
4502 //===----------------------------------------------------------------------===//
4504 /// \brief Get a lazy one-at-time loading module from bitcode.
4506 /// This isn't always used in a lazy context. In particular, it's also used by
4507 /// \a parseBitcodeFile(). If this is truly lazy, then we need to eagerly pull
4508 /// in forward-referenced functions from block address references.
4510 /// \param[in] WillMaterializeAll Set to \c true if the caller promises to
4511 /// materialize everything -- in particular, if this isn't truly lazy.
4512 static ErrorOr<Module *>
4513 getLazyBitcodeModuleImpl(std::unique_ptr<MemoryBuffer> &&Buffer,
4514 LLVMContext &Context, bool WillMaterializeAll,
4515 DiagnosticHandlerFunction DiagnosticHandler,
4516 bool ShouldLazyLoadMetadata = false) {
4517 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
4519 new BitcodeReader(Buffer.get(), Context, DiagnosticHandler);
4520 M->setMaterializer(R);
4522 auto cleanupOnError = [&](std::error_code EC) {
4523 R->releaseBuffer(); // Never take ownership on error.
4524 delete M; // Also deletes R.
4528 // Delay parsing Metadata if ShouldLazyLoadMetadata is true.
4529 if (std::error_code EC = R->ParseBitcodeInto(M, ShouldLazyLoadMetadata))
4530 return cleanupOnError(EC);
4532 if (!WillMaterializeAll)
4533 // Resolve forward references from blockaddresses.
4534 if (std::error_code EC = R->materializeForwardReferencedFunctions())
4535 return cleanupOnError(EC);
4537 Buffer.release(); // The BitcodeReader owns it now.
4542 llvm::getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &&Buffer,
4543 LLVMContext &Context,
4544 DiagnosticHandlerFunction DiagnosticHandler,
4545 bool ShouldLazyLoadMetadata) {
4546 return getLazyBitcodeModuleImpl(std::move(Buffer), Context, false,
4547 DiagnosticHandler, ShouldLazyLoadMetadata);
4550 ErrorOr<std::unique_ptr<Module>>
4551 llvm::getStreamedBitcodeModule(StringRef Name, DataStreamer *Streamer,
4552 LLVMContext &Context,
4553 DiagnosticHandlerFunction DiagnosticHandler) {
4554 std::unique_ptr<Module> M = make_unique<Module>(Name, Context);
4555 BitcodeReader *R = new BitcodeReader(Streamer, Context, DiagnosticHandler);
4556 M->setMaterializer(R);
4557 if (std::error_code EC = R->ParseBitcodeInto(M.get()))
4559 return std::move(M);
4563 llvm::parseBitcodeFile(MemoryBufferRef Buffer, LLVMContext &Context,
4564 DiagnosticHandlerFunction DiagnosticHandler) {
4565 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
4566 ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModuleImpl(
4567 std::move(Buf), Context, true, DiagnosticHandler);
4570 Module *M = ModuleOrErr.get();
4571 // Read in the entire module, and destroy the BitcodeReader.
4572 if (std::error_code EC = M->materializeAllPermanently()) {
4577 // TODO: Restore the use-lists to the in-memory state when the bitcode was
4578 // written. We must defer until the Module has been fully materialized.
4584 llvm::getBitcodeTargetTriple(MemoryBufferRef Buffer, LLVMContext &Context,
4585 DiagnosticHandlerFunction DiagnosticHandler) {
4586 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
4587 auto R = llvm::make_unique<BitcodeReader>(Buf.release(), Context,
4589 ErrorOr<std::string> Triple = R->parseTriple();
4590 if (Triple.getError())
4592 return Triple.get();