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 "BitcodeReader.h"
12 #include "llvm/ADT/STLExtras.h"
13 #include "llvm/ADT/SmallString.h"
14 #include "llvm/ADT/SmallVector.h"
15 #include "llvm/ADT/Triple.h"
16 #include "llvm/Bitcode/LLVMBitCodes.h"
17 #include "llvm/IR/AutoUpgrade.h"
18 #include "llvm/IR/Constants.h"
19 #include "llvm/IR/DebugInfoMetadata.h"
20 #include "llvm/IR/DerivedTypes.h"
21 #include "llvm/IR/DiagnosticPrinter.h"
22 #include "llvm/IR/InlineAsm.h"
23 #include "llvm/IR/IntrinsicInst.h"
24 #include "llvm/IR/LLVMContext.h"
25 #include "llvm/IR/Module.h"
26 #include "llvm/IR/OperandTraits.h"
27 #include "llvm/IR/Operator.h"
28 #include "llvm/Support/DataStream.h"
29 #include "llvm/Support/ManagedStatic.h"
30 #include "llvm/Support/MathExtras.h"
31 #include "llvm/Support/MemoryBuffer.h"
32 #include "llvm/Support/raw_ostream.h"
37 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
40 BitcodeDiagnosticInfo::BitcodeDiagnosticInfo(std::error_code EC,
41 DiagnosticSeverity Severity,
43 : DiagnosticInfo(DK_Bitcode, Severity), Msg(Msg), EC(EC) {}
45 void BitcodeDiagnosticInfo::print(DiagnosticPrinter &DP) const { DP << Msg; }
47 static std::error_code Error(DiagnosticHandlerFunction DiagnosticHandler,
48 std::error_code EC, const Twine &Message) {
49 BitcodeDiagnosticInfo DI(EC, DS_Error, Message);
50 DiagnosticHandler(DI);
54 static std::error_code Error(DiagnosticHandlerFunction DiagnosticHandler,
56 return Error(DiagnosticHandler, EC, EC.message());
59 std::error_code BitcodeReader::Error(BitcodeError E, const Twine &Message) {
60 return ::Error(DiagnosticHandler, make_error_code(E), Message);
63 std::error_code BitcodeReader::Error(const Twine &Message) {
64 return ::Error(DiagnosticHandler,
65 make_error_code(BitcodeError::CorruptedBitcode), Message);
68 std::error_code BitcodeReader::Error(BitcodeError E) {
69 return ::Error(DiagnosticHandler, make_error_code(E));
72 static DiagnosticHandlerFunction getDiagHandler(DiagnosticHandlerFunction F,
76 return [&C](const DiagnosticInfo &DI) { C.diagnose(DI); };
79 BitcodeReader::BitcodeReader(MemoryBuffer *buffer, LLVMContext &C,
80 DiagnosticHandlerFunction DiagnosticHandler)
81 : Context(C), DiagnosticHandler(getDiagHandler(DiagnosticHandler, C)),
82 TheModule(nullptr), Buffer(buffer), LazyStreamer(nullptr),
83 NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
84 MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false),
85 WillMaterializeAllForwardRefs(false), IsMetadataMaterialized(false) {}
87 BitcodeReader::BitcodeReader(DataStreamer *streamer, LLVMContext &C,
88 DiagnosticHandlerFunction DiagnosticHandler)
89 : Context(C), DiagnosticHandler(getDiagHandler(DiagnosticHandler, C)),
90 TheModule(nullptr), Buffer(nullptr), LazyStreamer(streamer),
91 NextUnreadBit(0), SeenValueSymbolTable(false), ValueList(C),
92 MDValueList(C), SeenFirstFunctionBody(false), UseRelativeIDs(false),
93 WillMaterializeAllForwardRefs(false), IsMetadataMaterialized(false) {}
95 std::error_code BitcodeReader::materializeForwardReferencedFunctions() {
96 if (WillMaterializeAllForwardRefs)
97 return std::error_code();
100 WillMaterializeAllForwardRefs = true;
102 while (!BasicBlockFwdRefQueue.empty()) {
103 Function *F = BasicBlockFwdRefQueue.front();
104 BasicBlockFwdRefQueue.pop_front();
105 assert(F && "Expected valid function");
106 if (!BasicBlockFwdRefs.count(F))
107 // Already materialized.
110 // Check for a function that isn't materializable to prevent an infinite
111 // loop. When parsing a blockaddress stored in a global variable, there
112 // isn't a trivial way to check if a function will have a body without a
113 // linear search through FunctionsWithBodies, so just check it here.
114 if (!F->isMaterializable())
115 return Error("Never resolved function from blockaddress");
117 // Try to materialize F.
118 if (std::error_code EC = materialize(F))
121 assert(BasicBlockFwdRefs.empty() && "Function missing from queue");
124 WillMaterializeAllForwardRefs = false;
125 return std::error_code();
128 void BitcodeReader::FreeState() {
130 std::vector<Type*>().swap(TypeList);
133 std::vector<Comdat *>().swap(ComdatList);
135 std::vector<AttributeSet>().swap(MAttributes);
136 std::vector<BasicBlock*>().swap(FunctionBBs);
137 std::vector<Function*>().swap(FunctionsWithBodies);
138 DeferredFunctionInfo.clear();
139 DeferredMetadataInfo.clear();
142 assert(BasicBlockFwdRefs.empty() && "Unresolved blockaddress fwd references");
143 BasicBlockFwdRefQueue.clear();
146 //===----------------------------------------------------------------------===//
147 // Helper functions to implement forward reference resolution, etc.
148 //===----------------------------------------------------------------------===//
150 /// ConvertToString - Convert a string from a record into an std::string, return
152 template<typename StrTy>
153 static bool ConvertToString(ArrayRef<uint64_t> Record, unsigned Idx,
155 if (Idx > Record.size())
158 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
159 Result += (char)Record[i];
163 static bool hasImplicitComdat(size_t Val) {
167 case 1: // Old WeakAnyLinkage
168 case 4: // Old LinkOnceAnyLinkage
169 case 10: // Old WeakODRLinkage
170 case 11: // Old LinkOnceODRLinkage
175 static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) {
177 default: // Map unknown/new linkages to external
179 return GlobalValue::ExternalLinkage;
181 return GlobalValue::AppendingLinkage;
183 return GlobalValue::InternalLinkage;
185 return GlobalValue::ExternalLinkage; // Obsolete DLLImportLinkage
187 return GlobalValue::ExternalLinkage; // Obsolete DLLExportLinkage
189 return GlobalValue::ExternalWeakLinkage;
191 return GlobalValue::CommonLinkage;
193 return GlobalValue::PrivateLinkage;
195 return GlobalValue::AvailableExternallyLinkage;
197 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateLinkage
199 return GlobalValue::PrivateLinkage; // Obsolete LinkerPrivateWeakLinkage
201 return GlobalValue::ExternalLinkage; // Obsolete LinkOnceODRAutoHideLinkage
202 case 1: // Old value with implicit comdat.
204 return GlobalValue::WeakAnyLinkage;
205 case 10: // Old value with implicit comdat.
207 return GlobalValue::WeakODRLinkage;
208 case 4: // Old value with implicit comdat.
210 return GlobalValue::LinkOnceAnyLinkage;
211 case 11: // Old value with implicit comdat.
213 return GlobalValue::LinkOnceODRLinkage;
217 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
219 default: // Map unknown visibilities to default.
220 case 0: return GlobalValue::DefaultVisibility;
221 case 1: return GlobalValue::HiddenVisibility;
222 case 2: return GlobalValue::ProtectedVisibility;
226 static GlobalValue::DLLStorageClassTypes
227 GetDecodedDLLStorageClass(unsigned Val) {
229 default: // Map unknown values to default.
230 case 0: return GlobalValue::DefaultStorageClass;
231 case 1: return GlobalValue::DLLImportStorageClass;
232 case 2: return GlobalValue::DLLExportStorageClass;
236 static GlobalVariable::ThreadLocalMode GetDecodedThreadLocalMode(unsigned Val) {
238 case 0: return GlobalVariable::NotThreadLocal;
239 default: // Map unknown non-zero value to general dynamic.
240 case 1: return GlobalVariable::GeneralDynamicTLSModel;
241 case 2: return GlobalVariable::LocalDynamicTLSModel;
242 case 3: return GlobalVariable::InitialExecTLSModel;
243 case 4: return GlobalVariable::LocalExecTLSModel;
247 static int GetDecodedCastOpcode(unsigned Val) {
250 case bitc::CAST_TRUNC : return Instruction::Trunc;
251 case bitc::CAST_ZEXT : return Instruction::ZExt;
252 case bitc::CAST_SEXT : return Instruction::SExt;
253 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
254 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
255 case bitc::CAST_UITOFP : return Instruction::UIToFP;
256 case bitc::CAST_SITOFP : return Instruction::SIToFP;
257 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
258 case bitc::CAST_FPEXT : return Instruction::FPExt;
259 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
260 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
261 case bitc::CAST_BITCAST : return Instruction::BitCast;
262 case bitc::CAST_ADDRSPACECAST: return Instruction::AddrSpaceCast;
265 static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
268 case bitc::BINOP_ADD:
269 return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
270 case bitc::BINOP_SUB:
271 return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
272 case bitc::BINOP_MUL:
273 return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
274 case bitc::BINOP_UDIV: return Instruction::UDiv;
275 case bitc::BINOP_SDIV:
276 return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
277 case bitc::BINOP_UREM: return Instruction::URem;
278 case bitc::BINOP_SREM:
279 return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
280 case bitc::BINOP_SHL: return Instruction::Shl;
281 case bitc::BINOP_LSHR: return Instruction::LShr;
282 case bitc::BINOP_ASHR: return Instruction::AShr;
283 case bitc::BINOP_AND: return Instruction::And;
284 case bitc::BINOP_OR: return Instruction::Or;
285 case bitc::BINOP_XOR: return Instruction::Xor;
289 static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
291 default: return AtomicRMWInst::BAD_BINOP;
292 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
293 case bitc::RMW_ADD: return AtomicRMWInst::Add;
294 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
295 case bitc::RMW_AND: return AtomicRMWInst::And;
296 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
297 case bitc::RMW_OR: return AtomicRMWInst::Or;
298 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
299 case bitc::RMW_MAX: return AtomicRMWInst::Max;
300 case bitc::RMW_MIN: return AtomicRMWInst::Min;
301 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
302 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
306 static AtomicOrdering GetDecodedOrdering(unsigned Val) {
308 case bitc::ORDERING_NOTATOMIC: return NotAtomic;
309 case bitc::ORDERING_UNORDERED: return Unordered;
310 case bitc::ORDERING_MONOTONIC: return Monotonic;
311 case bitc::ORDERING_ACQUIRE: return Acquire;
312 case bitc::ORDERING_RELEASE: return Release;
313 case bitc::ORDERING_ACQREL: return AcquireRelease;
314 default: // Map unknown orderings to sequentially-consistent.
315 case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
319 static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
321 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
322 default: // Map unknown scopes to cross-thread.
323 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
327 static Comdat::SelectionKind getDecodedComdatSelectionKind(unsigned Val) {
329 default: // Map unknown selection kinds to any.
330 case bitc::COMDAT_SELECTION_KIND_ANY:
332 case bitc::COMDAT_SELECTION_KIND_EXACT_MATCH:
333 return Comdat::ExactMatch;
334 case bitc::COMDAT_SELECTION_KIND_LARGEST:
335 return Comdat::Largest;
336 case bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES:
337 return Comdat::NoDuplicates;
338 case bitc::COMDAT_SELECTION_KIND_SAME_SIZE:
339 return Comdat::SameSize;
343 static void UpgradeDLLImportExportLinkage(llvm::GlobalValue *GV, unsigned Val) {
345 case 5: GV->setDLLStorageClass(GlobalValue::DLLImportStorageClass); break;
346 case 6: GV->setDLLStorageClass(GlobalValue::DLLExportStorageClass); break;
352 /// @brief A class for maintaining the slot number definition
353 /// as a placeholder for the actual definition for forward constants defs.
354 class ConstantPlaceHolder : public ConstantExpr {
355 void operator=(const ConstantPlaceHolder &) = delete;
357 // allocate space for exactly one operand
358 void *operator new(size_t s) {
359 return User::operator new(s, 1);
361 explicit ConstantPlaceHolder(Type *Ty, LLVMContext& Context)
362 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
363 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
366 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
367 static bool classof(const Value *V) {
368 return isa<ConstantExpr>(V) &&
369 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
373 /// Provide fast operand accessors
374 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
378 // FIXME: can we inherit this from ConstantExpr?
380 struct OperandTraits<ConstantPlaceHolder> :
381 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
383 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(ConstantPlaceHolder, Value)
387 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
396 WeakVH &OldV = ValuePtrs[Idx];
402 // Handle constants and non-constants (e.g. instrs) differently for
404 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
405 ResolveConstants.push_back(std::make_pair(PHC, Idx));
408 // If there was a forward reference to this value, replace it.
409 Value *PrevVal = OldV;
410 OldV->replaceAllUsesWith(V);
416 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
421 if (Value *V = ValuePtrs[Idx]) {
422 assert(Ty == V->getType() && "Type mismatch in constant table!");
423 return cast<Constant>(V);
426 // Create and return a placeholder, which will later be RAUW'd.
427 Constant *C = new ConstantPlaceHolder(Ty, Context);
432 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, Type *Ty) {
436 if (Value *V = ValuePtrs[Idx]) {
437 assert((!Ty || Ty == V->getType()) && "Type mismatch in value table!");
441 // No type specified, must be invalid reference.
442 if (!Ty) return nullptr;
444 // Create and return a placeholder, which will later be RAUW'd.
445 Value *V = new Argument(Ty);
450 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
451 /// resolves any forward references. The idea behind this is that we sometimes
452 /// get constants (such as large arrays) which reference *many* forward ref
453 /// constants. Replacing each of these causes a lot of thrashing when
454 /// building/reuniquing the constant. Instead of doing this, we look at all the
455 /// uses and rewrite all the place holders at once for any constant that uses
457 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
458 // Sort the values by-pointer so that they are efficient to look up with a
460 std::sort(ResolveConstants.begin(), ResolveConstants.end());
462 SmallVector<Constant*, 64> NewOps;
464 while (!ResolveConstants.empty()) {
465 Value *RealVal = operator[](ResolveConstants.back().second);
466 Constant *Placeholder = ResolveConstants.back().first;
467 ResolveConstants.pop_back();
469 // Loop over all users of the placeholder, updating them to reference the
470 // new value. If they reference more than one placeholder, update them all
472 while (!Placeholder->use_empty()) {
473 auto UI = Placeholder->user_begin();
476 // If the using object isn't uniqued, just update the operands. This
477 // handles instructions and initializers for global variables.
478 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
479 UI.getUse().set(RealVal);
483 // Otherwise, we have a constant that uses the placeholder. Replace that
484 // constant with a new constant that has *all* placeholder uses updated.
485 Constant *UserC = cast<Constant>(U);
486 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
489 if (!isa<ConstantPlaceHolder>(*I)) {
490 // Not a placeholder reference.
492 } else if (*I == Placeholder) {
493 // Common case is that it just references this one placeholder.
496 // Otherwise, look up the placeholder in ResolveConstants.
497 ResolveConstantsTy::iterator It =
498 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
499 std::pair<Constant*, unsigned>(cast<Constant>(*I),
501 assert(It != ResolveConstants.end() && It->first == *I);
502 NewOp = operator[](It->second);
505 NewOps.push_back(cast<Constant>(NewOp));
508 // Make the new constant.
510 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
511 NewC = ConstantArray::get(UserCA->getType(), NewOps);
512 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
513 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
514 } else if (isa<ConstantVector>(UserC)) {
515 NewC = ConstantVector::get(NewOps);
517 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
518 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
521 UserC->replaceAllUsesWith(NewC);
522 UserC->destroyConstant();
526 // Update all ValueHandles, they should be the only users at this point.
527 Placeholder->replaceAllUsesWith(RealVal);
532 void BitcodeReaderMDValueList::AssignValue(Metadata *MD, unsigned Idx) {
541 TrackingMDRef &OldMD = MDValuePtrs[Idx];
547 // If there was a forward reference to this value, replace it.
548 TempMDTuple PrevMD(cast<MDTuple>(OldMD.get()));
549 PrevMD->replaceAllUsesWith(MD);
553 Metadata *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
557 if (Metadata *MD = MDValuePtrs[Idx])
560 // Track forward refs to be resolved later.
562 MinFwdRef = std::min(MinFwdRef, Idx);
563 MaxFwdRef = std::max(MaxFwdRef, Idx);
566 MinFwdRef = MaxFwdRef = Idx;
570 // Create and return a placeholder, which will later be RAUW'd.
571 Metadata *MD = MDNode::getTemporary(Context, None).release();
572 MDValuePtrs[Idx].reset(MD);
576 void BitcodeReaderMDValueList::tryToResolveCycles() {
582 // Still forward references... can't resolve cycles.
585 // Resolve any cycles.
586 for (unsigned I = MinFwdRef, E = MaxFwdRef + 1; I != E; ++I) {
587 auto &MD = MDValuePtrs[I];
588 auto *N = dyn_cast_or_null<MDNode>(MD);
592 assert(!N->isTemporary() && "Unexpected forward reference");
596 // Make sure we return early again until there's another forward ref.
600 Type *BitcodeReader::getTypeByID(unsigned ID) {
601 // The type table size is always specified correctly.
602 if (ID >= TypeList.size())
605 if (Type *Ty = TypeList[ID])
608 // If we have a forward reference, the only possible case is when it is to a
609 // named struct. Just create a placeholder for now.
610 return TypeList[ID] = createIdentifiedStructType(Context);
613 StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context,
615 auto *Ret = StructType::create(Context, Name);
616 IdentifiedStructTypes.push_back(Ret);
620 StructType *BitcodeReader::createIdentifiedStructType(LLVMContext &Context) {
621 auto *Ret = StructType::create(Context);
622 IdentifiedStructTypes.push_back(Ret);
627 //===----------------------------------------------------------------------===//
628 // Functions for parsing blocks from the bitcode file
629 //===----------------------------------------------------------------------===//
632 /// \brief This fills an AttrBuilder object with the LLVM attributes that have
633 /// been decoded from the given integer. This function must stay in sync with
634 /// 'encodeLLVMAttributesForBitcode'.
635 static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
636 uint64_t EncodedAttrs) {
637 // FIXME: Remove in 4.0.
639 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
640 // the bits above 31 down by 11 bits.
641 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
642 assert((!Alignment || isPowerOf2_32(Alignment)) &&
643 "Alignment must be a power of two.");
646 B.addAlignmentAttr(Alignment);
647 B.addRawValue(((EncodedAttrs & (0xfffffULL << 32)) >> 11) |
648 (EncodedAttrs & 0xffff));
651 std::error_code BitcodeReader::ParseAttributeBlock() {
652 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
653 return Error("Invalid record");
655 if (!MAttributes.empty())
656 return Error("Invalid multiple blocks");
658 SmallVector<uint64_t, 64> Record;
660 SmallVector<AttributeSet, 8> Attrs;
662 // Read all the records.
664 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
666 switch (Entry.Kind) {
667 case BitstreamEntry::SubBlock: // Handled for us already.
668 case BitstreamEntry::Error:
669 return Error("Malformed block");
670 case BitstreamEntry::EndBlock:
671 return std::error_code();
672 case BitstreamEntry::Record:
673 // The interesting case.
679 switch (Stream.readRecord(Entry.ID, Record)) {
680 default: // Default behavior: ignore.
682 case bitc::PARAMATTR_CODE_ENTRY_OLD: { // ENTRY: [paramidx0, attr0, ...]
683 // FIXME: Remove in 4.0.
684 if (Record.size() & 1)
685 return Error("Invalid record");
687 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
689 decodeLLVMAttributesForBitcode(B, Record[i+1]);
690 Attrs.push_back(AttributeSet::get(Context, Record[i], B));
693 MAttributes.push_back(AttributeSet::get(Context, Attrs));
697 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [attrgrp0, attrgrp1, ...]
698 for (unsigned i = 0, e = Record.size(); i != e; ++i)
699 Attrs.push_back(MAttributeGroups[Record[i]]);
701 MAttributes.push_back(AttributeSet::get(Context, Attrs));
709 // Returns Attribute::None on unrecognized codes.
710 static Attribute::AttrKind GetAttrFromCode(uint64_t Code) {
713 return Attribute::None;
714 case bitc::ATTR_KIND_ALIGNMENT:
715 return Attribute::Alignment;
716 case bitc::ATTR_KIND_ALWAYS_INLINE:
717 return Attribute::AlwaysInline;
718 case bitc::ATTR_KIND_BUILTIN:
719 return Attribute::Builtin;
720 case bitc::ATTR_KIND_BY_VAL:
721 return Attribute::ByVal;
722 case bitc::ATTR_KIND_IN_ALLOCA:
723 return Attribute::InAlloca;
724 case bitc::ATTR_KIND_COLD:
725 return Attribute::Cold;
726 case bitc::ATTR_KIND_INLINE_HINT:
727 return Attribute::InlineHint;
728 case bitc::ATTR_KIND_IN_REG:
729 return Attribute::InReg;
730 case bitc::ATTR_KIND_JUMP_TABLE:
731 return Attribute::JumpTable;
732 case bitc::ATTR_KIND_MIN_SIZE:
733 return Attribute::MinSize;
734 case bitc::ATTR_KIND_NAKED:
735 return Attribute::Naked;
736 case bitc::ATTR_KIND_NEST:
737 return Attribute::Nest;
738 case bitc::ATTR_KIND_NO_ALIAS:
739 return Attribute::NoAlias;
740 case bitc::ATTR_KIND_NO_BUILTIN:
741 return Attribute::NoBuiltin;
742 case bitc::ATTR_KIND_NO_CAPTURE:
743 return Attribute::NoCapture;
744 case bitc::ATTR_KIND_NO_DUPLICATE:
745 return Attribute::NoDuplicate;
746 case bitc::ATTR_KIND_NO_IMPLICIT_FLOAT:
747 return Attribute::NoImplicitFloat;
748 case bitc::ATTR_KIND_NO_INLINE:
749 return Attribute::NoInline;
750 case bitc::ATTR_KIND_NON_LAZY_BIND:
751 return Attribute::NonLazyBind;
752 case bitc::ATTR_KIND_NON_NULL:
753 return Attribute::NonNull;
754 case bitc::ATTR_KIND_DEREFERENCEABLE:
755 return Attribute::Dereferenceable;
756 case bitc::ATTR_KIND_NO_RED_ZONE:
757 return Attribute::NoRedZone;
758 case bitc::ATTR_KIND_NO_RETURN:
759 return Attribute::NoReturn;
760 case bitc::ATTR_KIND_NO_UNWIND:
761 return Attribute::NoUnwind;
762 case bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE:
763 return Attribute::OptimizeForSize;
764 case bitc::ATTR_KIND_OPTIMIZE_NONE:
765 return Attribute::OptimizeNone;
766 case bitc::ATTR_KIND_READ_NONE:
767 return Attribute::ReadNone;
768 case bitc::ATTR_KIND_READ_ONLY:
769 return Attribute::ReadOnly;
770 case bitc::ATTR_KIND_RETURNED:
771 return Attribute::Returned;
772 case bitc::ATTR_KIND_RETURNS_TWICE:
773 return Attribute::ReturnsTwice;
774 case bitc::ATTR_KIND_S_EXT:
775 return Attribute::SExt;
776 case bitc::ATTR_KIND_STACK_ALIGNMENT:
777 return Attribute::StackAlignment;
778 case bitc::ATTR_KIND_STACK_PROTECT:
779 return Attribute::StackProtect;
780 case bitc::ATTR_KIND_STACK_PROTECT_REQ:
781 return Attribute::StackProtectReq;
782 case bitc::ATTR_KIND_STACK_PROTECT_STRONG:
783 return Attribute::StackProtectStrong;
784 case bitc::ATTR_KIND_STRUCT_RET:
785 return Attribute::StructRet;
786 case bitc::ATTR_KIND_SANITIZE_ADDRESS:
787 return Attribute::SanitizeAddress;
788 case bitc::ATTR_KIND_SANITIZE_THREAD:
789 return Attribute::SanitizeThread;
790 case bitc::ATTR_KIND_SANITIZE_MEMORY:
791 return Attribute::SanitizeMemory;
792 case bitc::ATTR_KIND_UW_TABLE:
793 return Attribute::UWTable;
794 case bitc::ATTR_KIND_Z_EXT:
795 return Attribute::ZExt;
799 std::error_code BitcodeReader::parseAlignmentValue(uint64_t Exponent,
800 unsigned &Alignment) {
801 // Note: Alignment in bitcode files is incremented by 1, so that zero
802 // can be used for default alignment.
803 if (Exponent > Value::MaxAlignmentExponent + 1)
804 return Error("Invalid alignment value");
805 Alignment = (1 << static_cast<unsigned>(Exponent)) >> 1;
806 return std::error_code();
809 std::error_code BitcodeReader::ParseAttrKind(uint64_t Code,
810 Attribute::AttrKind *Kind) {
811 *Kind = GetAttrFromCode(Code);
812 if (*Kind == Attribute::None)
813 return Error(BitcodeError::CorruptedBitcode,
814 "Unknown attribute kind (" + Twine(Code) + ")");
815 return std::error_code();
818 std::error_code BitcodeReader::ParseAttributeGroupBlock() {
819 if (Stream.EnterSubBlock(bitc::PARAMATTR_GROUP_BLOCK_ID))
820 return Error("Invalid record");
822 if (!MAttributeGroups.empty())
823 return Error("Invalid multiple blocks");
825 SmallVector<uint64_t, 64> Record;
827 // Read all the records.
829 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
831 switch (Entry.Kind) {
832 case BitstreamEntry::SubBlock: // Handled for us already.
833 case BitstreamEntry::Error:
834 return Error("Malformed block");
835 case BitstreamEntry::EndBlock:
836 return std::error_code();
837 case BitstreamEntry::Record:
838 // The interesting case.
844 switch (Stream.readRecord(Entry.ID, Record)) {
845 default: // Default behavior: ignore.
847 case bitc::PARAMATTR_GRP_CODE_ENTRY: { // ENTRY: [grpid, idx, a0, a1, ...]
848 if (Record.size() < 3)
849 return Error("Invalid record");
851 uint64_t GrpID = Record[0];
852 uint64_t Idx = Record[1]; // Index of the object this attribute refers to.
855 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
856 if (Record[i] == 0) { // Enum attribute
857 Attribute::AttrKind Kind;
858 if (std::error_code EC = ParseAttrKind(Record[++i], &Kind))
861 B.addAttribute(Kind);
862 } else if (Record[i] == 1) { // Integer attribute
863 Attribute::AttrKind Kind;
864 if (std::error_code EC = ParseAttrKind(Record[++i], &Kind))
866 if (Kind == Attribute::Alignment)
867 B.addAlignmentAttr(Record[++i]);
868 else if (Kind == Attribute::StackAlignment)
869 B.addStackAlignmentAttr(Record[++i]);
870 else if (Kind == Attribute::Dereferenceable)
871 B.addDereferenceableAttr(Record[++i]);
872 } else { // String attribute
873 assert((Record[i] == 3 || Record[i] == 4) &&
874 "Invalid attribute group entry");
875 bool HasValue = (Record[i++] == 4);
876 SmallString<64> KindStr;
877 SmallString<64> ValStr;
879 while (Record[i] != 0 && i != e)
880 KindStr += Record[i++];
881 assert(Record[i] == 0 && "Kind string not null terminated");
884 // Has a value associated with it.
885 ++i; // Skip the '0' that terminates the "kind" string.
886 while (Record[i] != 0 && i != e)
887 ValStr += Record[i++];
888 assert(Record[i] == 0 && "Value string not null terminated");
891 B.addAttribute(KindStr.str(), ValStr.str());
895 MAttributeGroups[GrpID] = AttributeSet::get(Context, Idx, B);
902 std::error_code BitcodeReader::ParseTypeTable() {
903 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
904 return Error("Invalid record");
906 return ParseTypeTableBody();
909 std::error_code BitcodeReader::ParseTypeTableBody() {
910 if (!TypeList.empty())
911 return Error("Invalid multiple blocks");
913 SmallVector<uint64_t, 64> Record;
914 unsigned NumRecords = 0;
916 SmallString<64> TypeName;
918 // Read all the records for this type table.
920 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
922 switch (Entry.Kind) {
923 case BitstreamEntry::SubBlock: // Handled for us already.
924 case BitstreamEntry::Error:
925 return Error("Malformed block");
926 case BitstreamEntry::EndBlock:
927 if (NumRecords != TypeList.size())
928 return Error("Malformed block");
929 return std::error_code();
930 case BitstreamEntry::Record:
931 // The interesting case.
937 Type *ResultTy = nullptr;
938 switch (Stream.readRecord(Entry.ID, Record)) {
940 return Error("Invalid value");
941 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
942 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
943 // type list. This allows us to reserve space.
944 if (Record.size() < 1)
945 return Error("Invalid record");
946 TypeList.resize(Record[0]);
948 case bitc::TYPE_CODE_VOID: // VOID
949 ResultTy = Type::getVoidTy(Context);
951 case bitc::TYPE_CODE_HALF: // HALF
952 ResultTy = Type::getHalfTy(Context);
954 case bitc::TYPE_CODE_FLOAT: // FLOAT
955 ResultTy = Type::getFloatTy(Context);
957 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
958 ResultTy = Type::getDoubleTy(Context);
960 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
961 ResultTy = Type::getX86_FP80Ty(Context);
963 case bitc::TYPE_CODE_FP128: // FP128
964 ResultTy = Type::getFP128Ty(Context);
966 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
967 ResultTy = Type::getPPC_FP128Ty(Context);
969 case bitc::TYPE_CODE_LABEL: // LABEL
970 ResultTy = Type::getLabelTy(Context);
972 case bitc::TYPE_CODE_METADATA: // METADATA
973 ResultTy = Type::getMetadataTy(Context);
975 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
976 ResultTy = Type::getX86_MMXTy(Context);
978 case bitc::TYPE_CODE_INTEGER: { // INTEGER: [width]
979 if (Record.size() < 1)
980 return Error("Invalid record");
982 uint64_t NumBits = Record[0];
983 if (NumBits < IntegerType::MIN_INT_BITS ||
984 NumBits > IntegerType::MAX_INT_BITS)
985 return Error("Bitwidth for integer type out of range");
986 ResultTy = IntegerType::get(Context, NumBits);
989 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
990 // [pointee type, address space]
991 if (Record.size() < 1)
992 return Error("Invalid record");
993 unsigned AddressSpace = 0;
994 if (Record.size() == 2)
995 AddressSpace = Record[1];
996 ResultTy = getTypeByID(Record[0]);
998 return Error("Invalid type");
999 ResultTy = PointerType::get(ResultTy, AddressSpace);
1002 case bitc::TYPE_CODE_FUNCTION_OLD: {
1003 // FIXME: attrid is dead, remove it in LLVM 4.0
1004 // FUNCTION: [vararg, attrid, retty, paramty x N]
1005 if (Record.size() < 3)
1006 return Error("Invalid record");
1007 SmallVector<Type*, 8> ArgTys;
1008 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
1009 if (Type *T = getTypeByID(Record[i]))
1010 ArgTys.push_back(T);
1015 ResultTy = getTypeByID(Record[2]);
1016 if (!ResultTy || ArgTys.size() < Record.size()-3)
1017 return Error("Invalid type");
1019 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1022 case bitc::TYPE_CODE_FUNCTION: {
1023 // FUNCTION: [vararg, retty, paramty x N]
1024 if (Record.size() < 2)
1025 return Error("Invalid record");
1026 SmallVector<Type*, 8> ArgTys;
1027 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
1028 if (Type *T = getTypeByID(Record[i]))
1029 ArgTys.push_back(T);
1034 ResultTy = getTypeByID(Record[1]);
1035 if (!ResultTy || ArgTys.size() < Record.size()-2)
1036 return Error("Invalid type");
1038 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
1041 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
1042 if (Record.size() < 1)
1043 return Error("Invalid record");
1044 SmallVector<Type*, 8> EltTys;
1045 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1046 if (Type *T = getTypeByID(Record[i]))
1047 EltTys.push_back(T);
1051 if (EltTys.size() != Record.size()-1)
1052 return Error("Invalid type");
1053 ResultTy = StructType::get(Context, EltTys, Record[0]);
1056 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
1057 if (ConvertToString(Record, 0, TypeName))
1058 return Error("Invalid record");
1061 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
1062 if (Record.size() < 1)
1063 return Error("Invalid record");
1065 if (NumRecords >= TypeList.size())
1066 return Error("Invalid TYPE table");
1068 // Check to see if this was forward referenced, if so fill in the temp.
1069 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1071 Res->setName(TypeName);
1072 TypeList[NumRecords] = nullptr;
1073 } else // Otherwise, create a new struct.
1074 Res = createIdentifiedStructType(Context, TypeName);
1077 SmallVector<Type*, 8> EltTys;
1078 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
1079 if (Type *T = getTypeByID(Record[i]))
1080 EltTys.push_back(T);
1084 if (EltTys.size() != Record.size()-1)
1085 return Error("Invalid record");
1086 Res->setBody(EltTys, Record[0]);
1090 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
1091 if (Record.size() != 1)
1092 return Error("Invalid record");
1094 if (NumRecords >= TypeList.size())
1095 return Error("Invalid TYPE table");
1097 // Check to see if this was forward referenced, if so fill in the temp.
1098 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
1100 Res->setName(TypeName);
1101 TypeList[NumRecords] = nullptr;
1102 } else // Otherwise, create a new struct with no body.
1103 Res = createIdentifiedStructType(Context, TypeName);
1108 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
1109 if (Record.size() < 2)
1110 return Error("Invalid record");
1111 if ((ResultTy = getTypeByID(Record[1])))
1112 ResultTy = ArrayType::get(ResultTy, Record[0]);
1114 return Error("Invalid type");
1116 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
1117 if (Record.size() < 2)
1118 return Error("Invalid record");
1119 if ((ResultTy = getTypeByID(Record[1])))
1120 ResultTy = VectorType::get(ResultTy, Record[0]);
1122 return Error("Invalid type");
1126 if (NumRecords >= TypeList.size())
1127 return Error("Invalid TYPE table");
1128 if (TypeList[NumRecords])
1130 "Invalid TYPE table: Only named structs can be forward referenced");
1131 assert(ResultTy && "Didn't read a type?");
1132 TypeList[NumRecords++] = ResultTy;
1136 std::error_code BitcodeReader::ParseValueSymbolTable() {
1137 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
1138 return Error("Invalid record");
1140 SmallVector<uint64_t, 64> Record;
1142 Triple TT(TheModule->getTargetTriple());
1144 // Read all the records for this value table.
1145 SmallString<128> ValueName;
1147 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1149 switch (Entry.Kind) {
1150 case BitstreamEntry::SubBlock: // Handled for us already.
1151 case BitstreamEntry::Error:
1152 return Error("Malformed block");
1153 case BitstreamEntry::EndBlock:
1154 return std::error_code();
1155 case BitstreamEntry::Record:
1156 // The interesting case.
1162 switch (Stream.readRecord(Entry.ID, Record)) {
1163 default: // Default behavior: unknown type.
1165 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
1166 if (ConvertToString(Record, 1, ValueName))
1167 return Error("Invalid record");
1168 unsigned ValueID = Record[0];
1169 if (ValueID >= ValueList.size() || !ValueList[ValueID])
1170 return Error("Invalid record");
1171 Value *V = ValueList[ValueID];
1173 V->setName(StringRef(ValueName.data(), ValueName.size()));
1174 if (auto *GO = dyn_cast<GlobalObject>(V)) {
1175 if (GO->getComdat() == reinterpret_cast<Comdat *>(1)) {
1176 if (TT.isOSBinFormatMachO())
1177 GO->setComdat(nullptr);
1179 GO->setComdat(TheModule->getOrInsertComdat(V->getName()));
1185 case bitc::VST_CODE_BBENTRY: {
1186 if (ConvertToString(Record, 1, ValueName))
1187 return Error("Invalid record");
1188 BasicBlock *BB = getBasicBlock(Record[0]);
1190 return Error("Invalid record");
1192 BB->setName(StringRef(ValueName.data(), ValueName.size()));
1200 static int64_t unrotateSign(uint64_t U) { return U & 1 ? ~(U >> 1) : U >> 1; }
1202 std::error_code BitcodeReader::ParseMetadata() {
1203 IsMetadataMaterialized = true;
1204 unsigned NextMDValueNo = MDValueList.size();
1206 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
1207 return Error("Invalid record");
1209 SmallVector<uint64_t, 64> Record;
1212 [&](unsigned ID) -> Metadata *{ return MDValueList.getValueFwdRef(ID); };
1213 auto getMDOrNull = [&](unsigned ID) -> Metadata *{
1215 return getMD(ID - 1);
1218 auto getMDString = [&](unsigned ID) -> MDString *{
1219 // This requires that the ID is not really a forward reference. In
1220 // particular, the MDString must already have been resolved.
1221 return cast_or_null<MDString>(getMDOrNull(ID));
1224 #define GET_OR_DISTINCT(CLASS, DISTINCT, ARGS) \
1225 (DISTINCT ? CLASS::getDistinct ARGS : CLASS::get ARGS)
1227 // Read all the records.
1229 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1231 switch (Entry.Kind) {
1232 case BitstreamEntry::SubBlock: // Handled for us already.
1233 case BitstreamEntry::Error:
1234 return Error("Malformed block");
1235 case BitstreamEntry::EndBlock:
1236 MDValueList.tryToResolveCycles();
1237 return std::error_code();
1238 case BitstreamEntry::Record:
1239 // The interesting case.
1245 unsigned Code = Stream.readRecord(Entry.ID, Record);
1246 bool IsDistinct = false;
1248 default: // Default behavior: ignore.
1250 case bitc::METADATA_NAME: {
1251 // Read name of the named metadata.
1252 SmallString<8> Name(Record.begin(), Record.end());
1254 Code = Stream.ReadCode();
1256 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
1257 unsigned NextBitCode = Stream.readRecord(Code, Record);
1258 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
1260 // Read named metadata elements.
1261 unsigned Size = Record.size();
1262 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
1263 for (unsigned i = 0; i != Size; ++i) {
1264 MDNode *MD = dyn_cast_or_null<MDNode>(MDValueList.getValueFwdRef(Record[i]));
1266 return Error("Invalid record");
1267 NMD->addOperand(MD);
1271 case bitc::METADATA_OLD_FN_NODE: {
1272 // FIXME: Remove in 4.0.
1273 // This is a LocalAsMetadata record, the only type of function-local
1275 if (Record.size() % 2 == 1)
1276 return Error("Invalid record");
1278 // If this isn't a LocalAsMetadata record, we're dropping it. This used
1279 // to be legal, but there's no upgrade path.
1280 auto dropRecord = [&] {
1281 MDValueList.AssignValue(MDNode::get(Context, None), NextMDValueNo++);
1283 if (Record.size() != 2) {
1288 Type *Ty = getTypeByID(Record[0]);
1289 if (Ty->isMetadataTy() || Ty->isVoidTy()) {
1294 MDValueList.AssignValue(
1295 LocalAsMetadata::get(ValueList.getValueFwdRef(Record[1], Ty)),
1299 case bitc::METADATA_OLD_NODE: {
1300 // FIXME: Remove in 4.0.
1301 if (Record.size() % 2 == 1)
1302 return Error("Invalid record");
1304 unsigned Size = Record.size();
1305 SmallVector<Metadata *, 8> Elts;
1306 for (unsigned i = 0; i != Size; i += 2) {
1307 Type *Ty = getTypeByID(Record[i]);
1309 return Error("Invalid record");
1310 if (Ty->isMetadataTy())
1311 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
1312 else if (!Ty->isVoidTy()) {
1314 ValueAsMetadata::get(ValueList.getValueFwdRef(Record[i + 1], Ty));
1315 assert(isa<ConstantAsMetadata>(MD) &&
1316 "Expected non-function-local metadata");
1319 Elts.push_back(nullptr);
1321 MDValueList.AssignValue(MDNode::get(Context, Elts), NextMDValueNo++);
1324 case bitc::METADATA_VALUE: {
1325 if (Record.size() != 2)
1326 return Error("Invalid record");
1328 Type *Ty = getTypeByID(Record[0]);
1329 if (Ty->isMetadataTy() || Ty->isVoidTy())
1330 return Error("Invalid record");
1332 MDValueList.AssignValue(
1333 ValueAsMetadata::get(ValueList.getValueFwdRef(Record[1], Ty)),
1337 case bitc::METADATA_DISTINCT_NODE:
1340 case bitc::METADATA_NODE: {
1341 SmallVector<Metadata *, 8> Elts;
1342 Elts.reserve(Record.size());
1343 for (unsigned ID : Record)
1344 Elts.push_back(ID ? MDValueList.getValueFwdRef(ID - 1) : nullptr);
1345 MDValueList.AssignValue(IsDistinct ? MDNode::getDistinct(Context, Elts)
1346 : MDNode::get(Context, Elts),
1350 case bitc::METADATA_LOCATION: {
1351 if (Record.size() != 5)
1352 return Error("Invalid record");
1354 auto get = Record[0] ? MDLocation::getDistinct : MDLocation::get;
1355 unsigned Line = Record[1];
1356 unsigned Column = Record[2];
1357 MDNode *Scope = cast<MDNode>(MDValueList.getValueFwdRef(Record[3]));
1358 Metadata *InlinedAt =
1359 Record[4] ? MDValueList.getValueFwdRef(Record[4] - 1) : nullptr;
1360 MDValueList.AssignValue(get(Context, Line, Column, Scope, InlinedAt),
1364 case bitc::METADATA_GENERIC_DEBUG: {
1365 if (Record.size() < 4)
1366 return Error("Invalid record");
1368 unsigned Tag = Record[1];
1369 unsigned Version = Record[2];
1371 if (Tag >= 1u << 16 || Version != 0)
1372 return Error("Invalid record");
1374 auto *Header = getMDString(Record[3]);
1375 SmallVector<Metadata *, 8> DwarfOps;
1376 for (unsigned I = 4, E = Record.size(); I != E; ++I)
1377 DwarfOps.push_back(Record[I] ? MDValueList.getValueFwdRef(Record[I] - 1)
1379 MDValueList.AssignValue(GET_OR_DISTINCT(GenericDebugNode, Record[0],
1380 (Context, Tag, Header, DwarfOps)),
1384 case bitc::METADATA_SUBRANGE: {
1385 if (Record.size() != 3)
1386 return Error("Invalid record");
1388 MDValueList.AssignValue(
1389 GET_OR_DISTINCT(MDSubrange, Record[0],
1390 (Context, Record[1], unrotateSign(Record[2]))),
1394 case bitc::METADATA_ENUMERATOR: {
1395 if (Record.size() != 3)
1396 return Error("Invalid record");
1398 MDValueList.AssignValue(GET_OR_DISTINCT(MDEnumerator, Record[0],
1399 (Context, unrotateSign(Record[1]),
1400 getMDString(Record[2]))),
1404 case bitc::METADATA_BASIC_TYPE: {
1405 if (Record.size() != 6)
1406 return Error("Invalid record");
1408 MDValueList.AssignValue(
1409 GET_OR_DISTINCT(MDBasicType, Record[0],
1410 (Context, Record[1], getMDString(Record[2]),
1411 Record[3], Record[4], Record[5])),
1415 case bitc::METADATA_DERIVED_TYPE: {
1416 if (Record.size() != 12)
1417 return Error("Invalid record");
1419 MDValueList.AssignValue(
1420 GET_OR_DISTINCT(MDDerivedType, Record[0],
1421 (Context, Record[1], getMDString(Record[2]),
1422 getMDOrNull(Record[3]), Record[4],
1423 getMDOrNull(Record[5]), getMDOrNull(Record[6]),
1424 Record[7], Record[8], Record[9], Record[10],
1425 getMDOrNull(Record[11]))),
1429 case bitc::METADATA_COMPOSITE_TYPE: {
1430 if (Record.size() != 16)
1431 return Error("Invalid record");
1433 MDValueList.AssignValue(
1434 GET_OR_DISTINCT(MDCompositeType, Record[0],
1435 (Context, Record[1], getMDString(Record[2]),
1436 getMDOrNull(Record[3]), Record[4],
1437 getMDOrNull(Record[5]), getMDOrNull(Record[6]),
1438 Record[7], Record[8], Record[9], Record[10],
1439 getMDOrNull(Record[11]), Record[12],
1440 getMDOrNull(Record[13]), getMDOrNull(Record[14]),
1441 getMDString(Record[15]))),
1445 case bitc::METADATA_SUBROUTINE_TYPE: {
1446 if (Record.size() != 3)
1447 return Error("Invalid record");
1449 MDValueList.AssignValue(
1450 GET_OR_DISTINCT(MDSubroutineType, Record[0],
1451 (Context, Record[1], getMDOrNull(Record[2]))),
1455 case bitc::METADATA_FILE: {
1456 if (Record.size() != 3)
1457 return Error("Invalid record");
1459 MDValueList.AssignValue(
1460 GET_OR_DISTINCT(MDFile, Record[0], (Context, getMDString(Record[1]),
1461 getMDString(Record[2]))),
1465 case bitc::METADATA_COMPILE_UNIT: {
1466 if (Record.size() != 14)
1467 return Error("Invalid record");
1469 MDValueList.AssignValue(
1470 GET_OR_DISTINCT(MDCompileUnit, Record[0],
1471 (Context, Record[1], getMDOrNull(Record[2]),
1472 getMDString(Record[3]), Record[4],
1473 getMDString(Record[5]), Record[6],
1474 getMDString(Record[7]), Record[8],
1475 getMDOrNull(Record[9]), getMDOrNull(Record[10]),
1476 getMDOrNull(Record[11]), getMDOrNull(Record[12]),
1477 getMDOrNull(Record[13]))),
1481 case bitc::METADATA_SUBPROGRAM: {
1482 if (Record.size() != 19)
1483 return Error("Invalid record");
1485 MDValueList.AssignValue(
1487 MDSubprogram, Record[0],
1488 (Context, getMDOrNull(Record[1]), getMDString(Record[2]),
1489 getMDString(Record[3]), getMDOrNull(Record[4]), Record[5],
1490 getMDOrNull(Record[6]), Record[7], Record[8], Record[9],
1491 getMDOrNull(Record[10]), Record[11], Record[12], Record[13],
1492 Record[14], getMDOrNull(Record[15]), getMDOrNull(Record[16]),
1493 getMDOrNull(Record[17]), getMDOrNull(Record[18]))),
1497 case bitc::METADATA_LEXICAL_BLOCK: {
1498 if (Record.size() != 5)
1499 return Error("Invalid record");
1501 MDValueList.AssignValue(
1502 GET_OR_DISTINCT(MDLexicalBlock, Record[0],
1503 (Context, getMDOrNull(Record[1]),
1504 getMDOrNull(Record[2]), Record[3], Record[4])),
1508 case bitc::METADATA_LEXICAL_BLOCK_FILE: {
1509 if (Record.size() != 4)
1510 return Error("Invalid record");
1512 MDValueList.AssignValue(
1513 GET_OR_DISTINCT(MDLexicalBlockFile, Record[0],
1514 (Context, getMDOrNull(Record[1]),
1515 getMDOrNull(Record[2]), Record[3])),
1519 case bitc::METADATA_NAMESPACE: {
1520 if (Record.size() != 5)
1521 return Error("Invalid record");
1523 MDValueList.AssignValue(
1524 GET_OR_DISTINCT(MDNamespace, Record[0],
1525 (Context, getMDOrNull(Record[1]),
1526 getMDOrNull(Record[2]), getMDString(Record[3]),
1531 case bitc::METADATA_TEMPLATE_TYPE: {
1532 if (Record.size() != 3)
1533 return Error("Invalid record");
1535 MDValueList.AssignValue(GET_OR_DISTINCT(MDTemplateTypeParameter,
1537 (Context, getMDString(Record[1]),
1538 getMDOrNull(Record[2]))),
1542 case bitc::METADATA_TEMPLATE_VALUE: {
1543 if (Record.size() != 5)
1544 return Error("Invalid record");
1546 MDValueList.AssignValue(
1547 GET_OR_DISTINCT(MDTemplateValueParameter, Record[0],
1548 (Context, Record[1], getMDString(Record[2]),
1549 getMDOrNull(Record[3]), getMDOrNull(Record[4]))),
1553 case bitc::METADATA_GLOBAL_VAR: {
1554 if (Record.size() != 11)
1555 return Error("Invalid record");
1557 MDValueList.AssignValue(
1558 GET_OR_DISTINCT(MDGlobalVariable, Record[0],
1559 (Context, getMDOrNull(Record[1]),
1560 getMDString(Record[2]), getMDString(Record[3]),
1561 getMDOrNull(Record[4]), Record[5],
1562 getMDOrNull(Record[6]), Record[7], Record[8],
1563 getMDOrNull(Record[9]), getMDOrNull(Record[10]))),
1567 case bitc::METADATA_LOCAL_VAR: {
1568 if (Record.size() != 10)
1569 return Error("Invalid record");
1571 MDValueList.AssignValue(
1572 GET_OR_DISTINCT(MDLocalVariable, Record[0],
1573 (Context, Record[1], getMDOrNull(Record[2]),
1574 getMDString(Record[3]), getMDOrNull(Record[4]),
1575 Record[5], getMDOrNull(Record[6]), Record[7],
1576 Record[8], getMDOrNull(Record[9]))),
1580 case bitc::METADATA_EXPRESSION: {
1581 if (Record.size() < 1)
1582 return Error("Invalid record");
1584 MDValueList.AssignValue(
1585 GET_OR_DISTINCT(MDExpression, Record[0],
1586 (Context, makeArrayRef(Record).slice(1))),
1590 case bitc::METADATA_OBJC_PROPERTY: {
1591 if (Record.size() != 8)
1592 return Error("Invalid record");
1594 MDValueList.AssignValue(
1595 GET_OR_DISTINCT(MDObjCProperty, Record[0],
1596 (Context, getMDString(Record[1]),
1597 getMDOrNull(Record[2]), Record[3],
1598 getMDString(Record[4]), getMDString(Record[5]),
1599 Record[6], getMDOrNull(Record[7]))),
1603 case bitc::METADATA_IMPORTED_ENTITY: {
1604 if (Record.size() != 6)
1605 return Error("Invalid record");
1607 MDValueList.AssignValue(
1608 GET_OR_DISTINCT(MDImportedEntity, Record[0],
1609 (Context, Record[1], getMDOrNull(Record[2]),
1610 getMDOrNull(Record[3]), Record[4],
1611 getMDString(Record[5]))),
1615 case bitc::METADATA_STRING: {
1616 std::string String(Record.begin(), Record.end());
1617 llvm::UpgradeMDStringConstant(String);
1618 Metadata *MD = MDString::get(Context, String);
1619 MDValueList.AssignValue(MD, NextMDValueNo++);
1622 case bitc::METADATA_KIND: {
1623 if (Record.size() < 2)
1624 return Error("Invalid record");
1626 unsigned Kind = Record[0];
1627 SmallString<8> Name(Record.begin()+1, Record.end());
1629 unsigned NewKind = TheModule->getMDKindID(Name.str());
1630 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
1631 return Error("Conflicting METADATA_KIND records");
1636 #undef GET_OR_DISTINCT
1639 /// decodeSignRotatedValue - Decode a signed value stored with the sign bit in
1640 /// the LSB for dense VBR encoding.
1641 uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
1646 // There is no such thing as -0 with integers. "-0" really means MININT.
1650 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
1651 /// values and aliases that we can.
1652 std::error_code BitcodeReader::ResolveGlobalAndAliasInits() {
1653 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
1654 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
1655 std::vector<std::pair<Function*, unsigned> > FunctionPrefixWorklist;
1656 std::vector<std::pair<Function*, unsigned> > FunctionPrologueWorklist;
1658 GlobalInitWorklist.swap(GlobalInits);
1659 AliasInitWorklist.swap(AliasInits);
1660 FunctionPrefixWorklist.swap(FunctionPrefixes);
1661 FunctionPrologueWorklist.swap(FunctionPrologues);
1663 while (!GlobalInitWorklist.empty()) {
1664 unsigned ValID = GlobalInitWorklist.back().second;
1665 if (ValID >= ValueList.size()) {
1666 // Not ready to resolve this yet, it requires something later in the file.
1667 GlobalInits.push_back(GlobalInitWorklist.back());
1669 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
1670 GlobalInitWorklist.back().first->setInitializer(C);
1672 return Error("Expected a constant");
1674 GlobalInitWorklist.pop_back();
1677 while (!AliasInitWorklist.empty()) {
1678 unsigned ValID = AliasInitWorklist.back().second;
1679 if (ValID >= ValueList.size()) {
1680 AliasInits.push_back(AliasInitWorklist.back());
1682 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
1683 AliasInitWorklist.back().first->setAliasee(C);
1685 return Error("Expected a constant");
1687 AliasInitWorklist.pop_back();
1690 while (!FunctionPrefixWorklist.empty()) {
1691 unsigned ValID = FunctionPrefixWorklist.back().second;
1692 if (ValID >= ValueList.size()) {
1693 FunctionPrefixes.push_back(FunctionPrefixWorklist.back());
1695 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
1696 FunctionPrefixWorklist.back().first->setPrefixData(C);
1698 return Error("Expected a constant");
1700 FunctionPrefixWorklist.pop_back();
1703 while (!FunctionPrologueWorklist.empty()) {
1704 unsigned ValID = FunctionPrologueWorklist.back().second;
1705 if (ValID >= ValueList.size()) {
1706 FunctionPrologues.push_back(FunctionPrologueWorklist.back());
1708 if (Constant *C = dyn_cast_or_null<Constant>(ValueList[ValID]))
1709 FunctionPrologueWorklist.back().first->setPrologueData(C);
1711 return Error("Expected a constant");
1713 FunctionPrologueWorklist.pop_back();
1716 return std::error_code();
1719 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
1720 SmallVector<uint64_t, 8> Words(Vals.size());
1721 std::transform(Vals.begin(), Vals.end(), Words.begin(),
1722 BitcodeReader::decodeSignRotatedValue);
1724 return APInt(TypeBits, Words);
1727 std::error_code BitcodeReader::ParseConstants() {
1728 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
1729 return Error("Invalid record");
1731 SmallVector<uint64_t, 64> Record;
1733 // Read all the records for this value table.
1734 Type *CurTy = Type::getInt32Ty(Context);
1735 unsigned NextCstNo = ValueList.size();
1737 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1739 switch (Entry.Kind) {
1740 case BitstreamEntry::SubBlock: // Handled for us already.
1741 case BitstreamEntry::Error:
1742 return Error("Malformed block");
1743 case BitstreamEntry::EndBlock:
1744 if (NextCstNo != ValueList.size())
1745 return Error("Invalid ronstant reference");
1747 // Once all the constants have been read, go through and resolve forward
1749 ValueList.ResolveConstantForwardRefs();
1750 return std::error_code();
1751 case BitstreamEntry::Record:
1752 // The interesting case.
1759 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
1761 default: // Default behavior: unknown constant
1762 case bitc::CST_CODE_UNDEF: // UNDEF
1763 V = UndefValue::get(CurTy);
1765 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
1767 return Error("Invalid record");
1768 if (Record[0] >= TypeList.size() || !TypeList[Record[0]])
1769 return Error("Invalid record");
1770 CurTy = TypeList[Record[0]];
1771 continue; // Skip the ValueList manipulation.
1772 case bitc::CST_CODE_NULL: // NULL
1773 V = Constant::getNullValue(CurTy);
1775 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
1776 if (!CurTy->isIntegerTy() || Record.empty())
1777 return Error("Invalid record");
1778 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
1780 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
1781 if (!CurTy->isIntegerTy() || Record.empty())
1782 return Error("Invalid record");
1784 APInt VInt = ReadWideAPInt(Record,
1785 cast<IntegerType>(CurTy)->getBitWidth());
1786 V = ConstantInt::get(Context, VInt);
1790 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1792 return Error("Invalid record");
1793 if (CurTy->isHalfTy())
1794 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf,
1795 APInt(16, (uint16_t)Record[0])));
1796 else if (CurTy->isFloatTy())
1797 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle,
1798 APInt(32, (uint32_t)Record[0])));
1799 else if (CurTy->isDoubleTy())
1800 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble,
1801 APInt(64, Record[0])));
1802 else if (CurTy->isX86_FP80Ty()) {
1803 // Bits are not stored the same way as a normal i80 APInt, compensate.
1804 uint64_t Rearrange[2];
1805 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1806 Rearrange[1] = Record[0] >> 48;
1807 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended,
1808 APInt(80, Rearrange)));
1809 } else if (CurTy->isFP128Ty())
1810 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad,
1811 APInt(128, Record)));
1812 else if (CurTy->isPPC_FP128Ty())
1813 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble,
1814 APInt(128, Record)));
1816 V = UndefValue::get(CurTy);
1820 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1822 return Error("Invalid record");
1824 unsigned Size = Record.size();
1825 SmallVector<Constant*, 16> Elts;
1827 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1828 for (unsigned i = 0; i != Size; ++i)
1829 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1830 STy->getElementType(i)));
1831 V = ConstantStruct::get(STy, Elts);
1832 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1833 Type *EltTy = ATy->getElementType();
1834 for (unsigned i = 0; i != Size; ++i)
1835 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1836 V = ConstantArray::get(ATy, Elts);
1837 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1838 Type *EltTy = VTy->getElementType();
1839 for (unsigned i = 0; i != Size; ++i)
1840 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1841 V = ConstantVector::get(Elts);
1843 V = UndefValue::get(CurTy);
1847 case bitc::CST_CODE_STRING: // STRING: [values]
1848 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1850 return Error("Invalid record");
1852 SmallString<16> Elts(Record.begin(), Record.end());
1853 V = ConstantDataArray::getString(Context, Elts,
1854 BitCode == bitc::CST_CODE_CSTRING);
1857 case bitc::CST_CODE_DATA: {// DATA: [n x value]
1859 return Error("Invalid record");
1861 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
1862 unsigned Size = Record.size();
1864 if (EltTy->isIntegerTy(8)) {
1865 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
1866 if (isa<VectorType>(CurTy))
1867 V = ConstantDataVector::get(Context, Elts);
1869 V = ConstantDataArray::get(Context, Elts);
1870 } else if (EltTy->isIntegerTy(16)) {
1871 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
1872 if (isa<VectorType>(CurTy))
1873 V = ConstantDataVector::get(Context, Elts);
1875 V = ConstantDataArray::get(Context, Elts);
1876 } else if (EltTy->isIntegerTy(32)) {
1877 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
1878 if (isa<VectorType>(CurTy))
1879 V = ConstantDataVector::get(Context, Elts);
1881 V = ConstantDataArray::get(Context, Elts);
1882 } else if (EltTy->isIntegerTy(64)) {
1883 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
1884 if (isa<VectorType>(CurTy))
1885 V = ConstantDataVector::get(Context, Elts);
1887 V = ConstantDataArray::get(Context, Elts);
1888 } else if (EltTy->isFloatTy()) {
1889 SmallVector<float, 16> Elts(Size);
1890 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
1891 if (isa<VectorType>(CurTy))
1892 V = ConstantDataVector::get(Context, Elts);
1894 V = ConstantDataArray::get(Context, Elts);
1895 } else if (EltTy->isDoubleTy()) {
1896 SmallVector<double, 16> Elts(Size);
1897 std::transform(Record.begin(), Record.end(), Elts.begin(),
1899 if (isa<VectorType>(CurTy))
1900 V = ConstantDataVector::get(Context, Elts);
1902 V = ConstantDataArray::get(Context, Elts);
1904 return Error("Invalid type for value");
1909 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1910 if (Record.size() < 3)
1911 return Error("Invalid record");
1912 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1914 V = UndefValue::get(CurTy); // Unknown binop.
1916 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1917 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1919 if (Record.size() >= 4) {
1920 if (Opc == Instruction::Add ||
1921 Opc == Instruction::Sub ||
1922 Opc == Instruction::Mul ||
1923 Opc == Instruction::Shl) {
1924 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1925 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1926 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1927 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1928 } else if (Opc == Instruction::SDiv ||
1929 Opc == Instruction::UDiv ||
1930 Opc == Instruction::LShr ||
1931 Opc == Instruction::AShr) {
1932 if (Record[3] & (1 << bitc::PEO_EXACT))
1933 Flags |= SDivOperator::IsExact;
1936 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1940 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1941 if (Record.size() < 3)
1942 return Error("Invalid record");
1943 int Opc = GetDecodedCastOpcode(Record[0]);
1945 V = UndefValue::get(CurTy); // Unknown cast.
1947 Type *OpTy = getTypeByID(Record[1]);
1949 return Error("Invalid record");
1950 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1951 V = UpgradeBitCastExpr(Opc, Op, CurTy);
1952 if (!V) V = ConstantExpr::getCast(Opc, Op, CurTy);
1956 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1957 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1959 Type *PointeeType = nullptr;
1960 if (Record.size() % 2)
1961 PointeeType = getTypeByID(Record[OpNum++]);
1962 SmallVector<Constant*, 16> Elts;
1963 while (OpNum != Record.size()) {
1964 Type *ElTy = getTypeByID(Record[OpNum++]);
1966 return Error("Invalid record");
1967 Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
1970 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1971 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1973 bitc::CST_CODE_CE_INBOUNDS_GEP);
1975 PointeeType != cast<GEPOperator>(V)->getSourceElementType())
1976 return Error("Invalid record");
1979 case bitc::CST_CODE_CE_SELECT: { // CE_SELECT: [opval#, opval#, opval#]
1980 if (Record.size() < 3)
1981 return Error("Invalid record");
1983 Type *SelectorTy = Type::getInt1Ty(Context);
1985 // If CurTy is a vector of length n, then Record[0] must be a <n x i1>
1986 // vector. Otherwise, it must be a single bit.
1987 if (VectorType *VTy = dyn_cast<VectorType>(CurTy))
1988 SelectorTy = VectorType::get(Type::getInt1Ty(Context),
1989 VTy->getNumElements());
1991 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1993 ValueList.getConstantFwdRef(Record[1],CurTy),
1994 ValueList.getConstantFwdRef(Record[2],CurTy));
1997 case bitc::CST_CODE_CE_EXTRACTELT
1998 : { // CE_EXTRACTELT: [opty, opval, opty, opval]
1999 if (Record.size() < 3)
2000 return Error("Invalid record");
2002 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2004 return Error("Invalid record");
2005 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2006 Constant *Op1 = nullptr;
2007 if (Record.size() == 4) {
2008 Type *IdxTy = getTypeByID(Record[2]);
2010 return Error("Invalid record");
2011 Op1 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2012 } else // TODO: Remove with llvm 4.0
2013 Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2015 return Error("Invalid record");
2016 V = ConstantExpr::getExtractElement(Op0, Op1);
2019 case bitc::CST_CODE_CE_INSERTELT
2020 : { // CE_INSERTELT: [opval, opval, opty, opval]
2021 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2022 if (Record.size() < 3 || !OpTy)
2023 return Error("Invalid record");
2024 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2025 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
2026 OpTy->getElementType());
2027 Constant *Op2 = nullptr;
2028 if (Record.size() == 4) {
2029 Type *IdxTy = getTypeByID(Record[2]);
2031 return Error("Invalid record");
2032 Op2 = ValueList.getConstantFwdRef(Record[3], IdxTy);
2033 } else // TODO: Remove with llvm 4.0
2034 Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
2036 return Error("Invalid record");
2037 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
2040 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
2041 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
2042 if (Record.size() < 3 || !OpTy)
2043 return Error("Invalid record");
2044 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
2045 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
2046 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2047 OpTy->getNumElements());
2048 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
2049 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2052 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
2053 VectorType *RTy = dyn_cast<VectorType>(CurTy);
2055 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
2056 if (Record.size() < 4 || !RTy || !OpTy)
2057 return Error("Invalid record");
2058 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2059 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2060 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
2061 RTy->getNumElements());
2062 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
2063 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
2066 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
2067 if (Record.size() < 4)
2068 return Error("Invalid record");
2069 Type *OpTy = getTypeByID(Record[0]);
2071 return Error("Invalid record");
2072 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
2073 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
2075 if (OpTy->isFPOrFPVectorTy())
2076 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
2078 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
2081 // This maintains backward compatibility, pre-asm dialect keywords.
2082 // FIXME: Remove with the 4.0 release.
2083 case bitc::CST_CODE_INLINEASM_OLD: {
2084 if (Record.size() < 2)
2085 return Error("Invalid record");
2086 std::string AsmStr, ConstrStr;
2087 bool HasSideEffects = Record[0] & 1;
2088 bool IsAlignStack = Record[0] >> 1;
2089 unsigned AsmStrSize = Record[1];
2090 if (2+AsmStrSize >= Record.size())
2091 return Error("Invalid record");
2092 unsigned ConstStrSize = Record[2+AsmStrSize];
2093 if (3+AsmStrSize+ConstStrSize > Record.size())
2094 return Error("Invalid record");
2096 for (unsigned i = 0; i != AsmStrSize; ++i)
2097 AsmStr += (char)Record[2+i];
2098 for (unsigned i = 0; i != ConstStrSize; ++i)
2099 ConstrStr += (char)Record[3+AsmStrSize+i];
2100 PointerType *PTy = cast<PointerType>(CurTy);
2101 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2102 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
2105 // This version adds support for the asm dialect keywords (e.g.,
2107 case bitc::CST_CODE_INLINEASM: {
2108 if (Record.size() < 2)
2109 return Error("Invalid record");
2110 std::string AsmStr, ConstrStr;
2111 bool HasSideEffects = Record[0] & 1;
2112 bool IsAlignStack = (Record[0] >> 1) & 1;
2113 unsigned AsmDialect = Record[0] >> 2;
2114 unsigned AsmStrSize = Record[1];
2115 if (2+AsmStrSize >= Record.size())
2116 return Error("Invalid record");
2117 unsigned ConstStrSize = Record[2+AsmStrSize];
2118 if (3+AsmStrSize+ConstStrSize > Record.size())
2119 return Error("Invalid record");
2121 for (unsigned i = 0; i != AsmStrSize; ++i)
2122 AsmStr += (char)Record[2+i];
2123 for (unsigned i = 0; i != ConstStrSize; ++i)
2124 ConstrStr += (char)Record[3+AsmStrSize+i];
2125 PointerType *PTy = cast<PointerType>(CurTy);
2126 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
2127 AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
2128 InlineAsm::AsmDialect(AsmDialect));
2131 case bitc::CST_CODE_BLOCKADDRESS:{
2132 if (Record.size() < 3)
2133 return Error("Invalid record");
2134 Type *FnTy = getTypeByID(Record[0]);
2136 return Error("Invalid record");
2138 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
2140 return Error("Invalid record");
2142 // Don't let Fn get dematerialized.
2143 BlockAddressesTaken.insert(Fn);
2145 // If the function is already parsed we can insert the block address right
2148 unsigned BBID = Record[2];
2150 // Invalid reference to entry block.
2151 return Error("Invalid ID");
2153 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
2154 for (size_t I = 0, E = BBID; I != E; ++I) {
2156 return Error("Invalid ID");
2161 // Otherwise insert a placeholder and remember it so it can be inserted
2162 // when the function is parsed.
2163 auto &FwdBBs = BasicBlockFwdRefs[Fn];
2165 BasicBlockFwdRefQueue.push_back(Fn);
2166 if (FwdBBs.size() < BBID + 1)
2167 FwdBBs.resize(BBID + 1);
2169 FwdBBs[BBID] = BasicBlock::Create(Context);
2172 V = BlockAddress::get(Fn, BB);
2177 ValueList.AssignValue(V, NextCstNo);
2182 std::error_code BitcodeReader::ParseUseLists() {
2183 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
2184 return Error("Invalid record");
2186 // Read all the records.
2187 SmallVector<uint64_t, 64> Record;
2189 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2191 switch (Entry.Kind) {
2192 case BitstreamEntry::SubBlock: // Handled for us already.
2193 case BitstreamEntry::Error:
2194 return Error("Malformed block");
2195 case BitstreamEntry::EndBlock:
2196 return std::error_code();
2197 case BitstreamEntry::Record:
2198 // The interesting case.
2202 // Read a use list record.
2205 switch (Stream.readRecord(Entry.ID, Record)) {
2206 default: // Default behavior: unknown type.
2208 case bitc::USELIST_CODE_BB:
2211 case bitc::USELIST_CODE_DEFAULT: {
2212 unsigned RecordLength = Record.size();
2213 if (RecordLength < 3)
2214 // Records should have at least an ID and two indexes.
2215 return Error("Invalid record");
2216 unsigned ID = Record.back();
2221 assert(ID < FunctionBBs.size() && "Basic block not found");
2222 V = FunctionBBs[ID];
2225 unsigned NumUses = 0;
2226 SmallDenseMap<const Use *, unsigned, 16> Order;
2227 for (const Use &U : V->uses()) {
2228 if (++NumUses > Record.size())
2230 Order[&U] = Record[NumUses - 1];
2232 if (Order.size() != Record.size() || NumUses > Record.size())
2233 // Mismatches can happen if the functions are being materialized lazily
2234 // (out-of-order), or a value has been upgraded.
2237 V->sortUseList([&](const Use &L, const Use &R) {
2238 return Order.lookup(&L) < Order.lookup(&R);
2246 /// When we see the block for metadata, remember where it is and then skip it.
2247 /// This lets us lazily deserialize the metadata.
2248 std::error_code BitcodeReader::rememberAndSkipMetadata() {
2249 // Save the current stream state.
2250 uint64_t CurBit = Stream.GetCurrentBitNo();
2251 DeferredMetadataInfo.push_back(CurBit);
2253 // Skip over the block for now.
2254 if (Stream.SkipBlock())
2255 return Error("Invalid record");
2256 return std::error_code();
2259 std::error_code BitcodeReader::materializeMetadata() {
2260 for (uint64_t BitPos : DeferredMetadataInfo) {
2261 // Move the bit stream to the saved position.
2262 Stream.JumpToBit(BitPos);
2263 if (std::error_code EC = ParseMetadata())
2266 DeferredMetadataInfo.clear();
2267 return std::error_code();
2270 /// RememberAndSkipFunctionBody - When we see the block for a function body,
2271 /// remember where it is and then skip it. This lets us lazily deserialize the
2273 std::error_code BitcodeReader::RememberAndSkipFunctionBody() {
2274 // Get the function we are talking about.
2275 if (FunctionsWithBodies.empty())
2276 return Error("Insufficient function protos");
2278 Function *Fn = FunctionsWithBodies.back();
2279 FunctionsWithBodies.pop_back();
2281 // Save the current stream state.
2282 uint64_t CurBit = Stream.GetCurrentBitNo();
2283 DeferredFunctionInfo[Fn] = CurBit;
2285 // Skip over the function block for now.
2286 if (Stream.SkipBlock())
2287 return Error("Invalid record");
2288 return std::error_code();
2291 std::error_code BitcodeReader::GlobalCleanup() {
2292 // Patch the initializers for globals and aliases up.
2293 ResolveGlobalAndAliasInits();
2294 if (!GlobalInits.empty() || !AliasInits.empty())
2295 return Error("Malformed global initializer set");
2297 // Look for intrinsic functions which need to be upgraded at some point
2298 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
2301 if (UpgradeIntrinsicFunction(FI, NewFn))
2302 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
2305 // Look for global variables which need to be renamed.
2306 for (Module::global_iterator
2307 GI = TheModule->global_begin(), GE = TheModule->global_end();
2309 GlobalVariable *GV = GI++;
2310 UpgradeGlobalVariable(GV);
2313 // Force deallocation of memory for these vectors to favor the client that
2314 // want lazy deserialization.
2315 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
2316 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
2317 return std::error_code();
2320 std::error_code BitcodeReader::ParseModule(bool Resume,
2321 bool ShouldLazyLoadMetadata) {
2323 Stream.JumpToBit(NextUnreadBit);
2324 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
2325 return Error("Invalid record");
2327 SmallVector<uint64_t, 64> Record;
2328 std::vector<std::string> SectionTable;
2329 std::vector<std::string> GCTable;
2331 // Read all the records for this module.
2333 BitstreamEntry Entry = Stream.advance();
2335 switch (Entry.Kind) {
2336 case BitstreamEntry::Error:
2337 return Error("Malformed block");
2338 case BitstreamEntry::EndBlock:
2339 return GlobalCleanup();
2341 case BitstreamEntry::SubBlock:
2343 default: // Skip unknown content.
2344 if (Stream.SkipBlock())
2345 return Error("Invalid record");
2347 case bitc::BLOCKINFO_BLOCK_ID:
2348 if (Stream.ReadBlockInfoBlock())
2349 return Error("Malformed block");
2351 case bitc::PARAMATTR_BLOCK_ID:
2352 if (std::error_code EC = ParseAttributeBlock())
2355 case bitc::PARAMATTR_GROUP_BLOCK_ID:
2356 if (std::error_code EC = ParseAttributeGroupBlock())
2359 case bitc::TYPE_BLOCK_ID_NEW:
2360 if (std::error_code EC = ParseTypeTable())
2363 case bitc::VALUE_SYMTAB_BLOCK_ID:
2364 if (std::error_code EC = ParseValueSymbolTable())
2366 SeenValueSymbolTable = true;
2368 case bitc::CONSTANTS_BLOCK_ID:
2369 if (std::error_code EC = ParseConstants())
2371 if (std::error_code EC = ResolveGlobalAndAliasInits())
2374 case bitc::METADATA_BLOCK_ID:
2375 if (ShouldLazyLoadMetadata && !IsMetadataMaterialized) {
2376 if (std::error_code EC = rememberAndSkipMetadata())
2380 assert(DeferredMetadataInfo.empty() && "Unexpected deferred metadata");
2381 if (std::error_code EC = ParseMetadata())
2384 case bitc::FUNCTION_BLOCK_ID:
2385 // If this is the first function body we've seen, reverse the
2386 // FunctionsWithBodies list.
2387 if (!SeenFirstFunctionBody) {
2388 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
2389 if (std::error_code EC = GlobalCleanup())
2391 SeenFirstFunctionBody = true;
2394 if (std::error_code EC = RememberAndSkipFunctionBody())
2396 // For streaming bitcode, suspend parsing when we reach the function
2397 // bodies. Subsequent materialization calls will resume it when
2398 // necessary. For streaming, the function bodies must be at the end of
2399 // the bitcode. If the bitcode file is old, the symbol table will be
2400 // at the end instead and will not have been seen yet. In this case,
2401 // just finish the parse now.
2402 if (LazyStreamer && SeenValueSymbolTable) {
2403 NextUnreadBit = Stream.GetCurrentBitNo();
2404 return std::error_code();
2407 case bitc::USELIST_BLOCK_ID:
2408 if (std::error_code EC = ParseUseLists())
2414 case BitstreamEntry::Record:
2415 // The interesting case.
2421 switch (Stream.readRecord(Entry.ID, Record)) {
2422 default: break; // Default behavior, ignore unknown content.
2423 case bitc::MODULE_CODE_VERSION: { // VERSION: [version#]
2424 if (Record.size() < 1)
2425 return Error("Invalid record");
2426 // Only version #0 and #1 are supported so far.
2427 unsigned module_version = Record[0];
2428 switch (module_version) {
2430 return Error("Invalid value");
2432 UseRelativeIDs = false;
2435 UseRelativeIDs = true;
2440 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
2442 if (ConvertToString(Record, 0, S))
2443 return Error("Invalid record");
2444 TheModule->setTargetTriple(S);
2447 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
2449 if (ConvertToString(Record, 0, S))
2450 return Error("Invalid record");
2451 TheModule->setDataLayout(S);
2454 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
2456 if (ConvertToString(Record, 0, S))
2457 return Error("Invalid record");
2458 TheModule->setModuleInlineAsm(S);
2461 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
2462 // FIXME: Remove in 4.0.
2464 if (ConvertToString(Record, 0, S))
2465 return Error("Invalid record");
2469 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
2471 if (ConvertToString(Record, 0, S))
2472 return Error("Invalid record");
2473 SectionTable.push_back(S);
2476 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
2478 if (ConvertToString(Record, 0, S))
2479 return Error("Invalid record");
2480 GCTable.push_back(S);
2483 case bitc::MODULE_CODE_COMDAT: { // COMDAT: [selection_kind, name]
2484 if (Record.size() < 2)
2485 return Error("Invalid record");
2486 Comdat::SelectionKind SK = getDecodedComdatSelectionKind(Record[0]);
2487 unsigned ComdatNameSize = Record[1];
2488 std::string ComdatName;
2489 ComdatName.reserve(ComdatNameSize);
2490 for (unsigned i = 0; i != ComdatNameSize; ++i)
2491 ComdatName += (char)Record[2 + i];
2492 Comdat *C = TheModule->getOrInsertComdat(ComdatName);
2493 C->setSelectionKind(SK);
2494 ComdatList.push_back(C);
2497 // GLOBALVAR: [pointer type, isconst, initid,
2498 // linkage, alignment, section, visibility, threadlocal,
2499 // unnamed_addr, externally_initialized, dllstorageclass,
2501 case bitc::MODULE_CODE_GLOBALVAR: {
2502 if (Record.size() < 6)
2503 return Error("Invalid record");
2504 Type *Ty = getTypeByID(Record[0]);
2506 return Error("Invalid record");
2507 if (!Ty->isPointerTy())
2508 return Error("Invalid type for value");
2509 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
2510 Ty = cast<PointerType>(Ty)->getElementType();
2512 bool isConstant = Record[1];
2513 uint64_t RawLinkage = Record[3];
2514 GlobalValue::LinkageTypes Linkage = getDecodedLinkage(RawLinkage);
2516 if (std::error_code EC = parseAlignmentValue(Record[4], Alignment))
2518 std::string Section;
2520 if (Record[5]-1 >= SectionTable.size())
2521 return Error("Invalid ID");
2522 Section = SectionTable[Record[5]-1];
2524 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
2525 // Local linkage must have default visibility.
2526 if (Record.size() > 6 && !GlobalValue::isLocalLinkage(Linkage))
2527 // FIXME: Change to an error if non-default in 4.0.
2528 Visibility = GetDecodedVisibility(Record[6]);
2530 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
2531 if (Record.size() > 7)
2532 TLM = GetDecodedThreadLocalMode(Record[7]);
2534 bool UnnamedAddr = false;
2535 if (Record.size() > 8)
2536 UnnamedAddr = Record[8];
2538 bool ExternallyInitialized = false;
2539 if (Record.size() > 9)
2540 ExternallyInitialized = Record[9];
2542 GlobalVariable *NewGV =
2543 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, nullptr, "", nullptr,
2544 TLM, AddressSpace, ExternallyInitialized);
2545 NewGV->setAlignment(Alignment);
2546 if (!Section.empty())
2547 NewGV->setSection(Section);
2548 NewGV->setVisibility(Visibility);
2549 NewGV->setUnnamedAddr(UnnamedAddr);
2551 if (Record.size() > 10)
2552 NewGV->setDLLStorageClass(GetDecodedDLLStorageClass(Record[10]));
2554 UpgradeDLLImportExportLinkage(NewGV, RawLinkage);
2556 ValueList.push_back(NewGV);
2558 // Remember which value to use for the global initializer.
2559 if (unsigned InitID = Record[2])
2560 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
2562 if (Record.size() > 11) {
2563 if (unsigned ComdatID = Record[11]) {
2564 assert(ComdatID <= ComdatList.size());
2565 NewGV->setComdat(ComdatList[ComdatID - 1]);
2567 } else if (hasImplicitComdat(RawLinkage)) {
2568 NewGV->setComdat(reinterpret_cast<Comdat *>(1));
2572 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
2573 // alignment, section, visibility, gc, unnamed_addr,
2574 // prologuedata, dllstorageclass, comdat, prefixdata]
2575 case bitc::MODULE_CODE_FUNCTION: {
2576 if (Record.size() < 8)
2577 return Error("Invalid record");
2578 Type *Ty = getTypeByID(Record[0]);
2580 return Error("Invalid record");
2581 if (!Ty->isPointerTy())
2582 return Error("Invalid type for value");
2584 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
2586 return Error("Invalid type for value");
2588 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
2591 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
2592 bool isProto = Record[2];
2593 uint64_t RawLinkage = Record[3];
2594 Func->setLinkage(getDecodedLinkage(RawLinkage));
2595 Func->setAttributes(getAttributes(Record[4]));
2598 if (std::error_code EC = parseAlignmentValue(Record[5], Alignment))
2600 Func->setAlignment(Alignment);
2602 if (Record[6]-1 >= SectionTable.size())
2603 return Error("Invalid ID");
2604 Func->setSection(SectionTable[Record[6]-1]);
2606 // Local linkage must have default visibility.
2607 if (!Func->hasLocalLinkage())
2608 // FIXME: Change to an error if non-default in 4.0.
2609 Func->setVisibility(GetDecodedVisibility(Record[7]));
2610 if (Record.size() > 8 && Record[8]) {
2611 if (Record[8]-1 > GCTable.size())
2612 return Error("Invalid ID");
2613 Func->setGC(GCTable[Record[8]-1].c_str());
2615 bool UnnamedAddr = false;
2616 if (Record.size() > 9)
2617 UnnamedAddr = Record[9];
2618 Func->setUnnamedAddr(UnnamedAddr);
2619 if (Record.size() > 10 && Record[10] != 0)
2620 FunctionPrologues.push_back(std::make_pair(Func, Record[10]-1));
2622 if (Record.size() > 11)
2623 Func->setDLLStorageClass(GetDecodedDLLStorageClass(Record[11]));
2625 UpgradeDLLImportExportLinkage(Func, RawLinkage);
2627 if (Record.size() > 12) {
2628 if (unsigned ComdatID = Record[12]) {
2629 assert(ComdatID <= ComdatList.size());
2630 Func->setComdat(ComdatList[ComdatID - 1]);
2632 } else if (hasImplicitComdat(RawLinkage)) {
2633 Func->setComdat(reinterpret_cast<Comdat *>(1));
2636 if (Record.size() > 13 && Record[13] != 0)
2637 FunctionPrefixes.push_back(std::make_pair(Func, Record[13]-1));
2639 ValueList.push_back(Func);
2641 // If this is a function with a body, remember the prototype we are
2642 // creating now, so that we can match up the body with them later.
2644 Func->setIsMaterializable(true);
2645 FunctionsWithBodies.push_back(Func);
2647 DeferredFunctionInfo[Func] = 0;
2651 // ALIAS: [alias type, aliasee val#, linkage]
2652 // ALIAS: [alias type, aliasee val#, linkage, visibility, dllstorageclass]
2653 case bitc::MODULE_CODE_ALIAS: {
2654 if (Record.size() < 3)
2655 return Error("Invalid record");
2656 Type *Ty = getTypeByID(Record[0]);
2658 return Error("Invalid record");
2659 auto *PTy = dyn_cast<PointerType>(Ty);
2661 return Error("Invalid type for value");
2664 GlobalAlias::create(PTy->getElementType(), PTy->getAddressSpace(),
2665 getDecodedLinkage(Record[2]), "", TheModule);
2666 // Old bitcode files didn't have visibility field.
2667 // Local linkage must have default visibility.
2668 if (Record.size() > 3 && !NewGA->hasLocalLinkage())
2669 // FIXME: Change to an error if non-default in 4.0.
2670 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
2671 if (Record.size() > 4)
2672 NewGA->setDLLStorageClass(GetDecodedDLLStorageClass(Record[4]));
2674 UpgradeDLLImportExportLinkage(NewGA, Record[2]);
2675 if (Record.size() > 5)
2676 NewGA->setThreadLocalMode(GetDecodedThreadLocalMode(Record[5]));
2677 if (Record.size() > 6)
2678 NewGA->setUnnamedAddr(Record[6]);
2679 ValueList.push_back(NewGA);
2680 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
2683 /// MODULE_CODE_PURGEVALS: [numvals]
2684 case bitc::MODULE_CODE_PURGEVALS:
2685 // Trim down the value list to the specified size.
2686 if (Record.size() < 1 || Record[0] > ValueList.size())
2687 return Error("Invalid record");
2688 ValueList.shrinkTo(Record[0]);
2695 std::error_code BitcodeReader::ParseBitcodeInto(Module *M,
2696 bool ShouldLazyLoadMetadata) {
2697 TheModule = nullptr;
2699 if (std::error_code EC = InitStream())
2702 // Sniff for the signature.
2703 if (Stream.Read(8) != 'B' ||
2704 Stream.Read(8) != 'C' ||
2705 Stream.Read(4) != 0x0 ||
2706 Stream.Read(4) != 0xC ||
2707 Stream.Read(4) != 0xE ||
2708 Stream.Read(4) != 0xD)
2709 return Error("Invalid bitcode signature");
2711 // We expect a number of well-defined blocks, though we don't necessarily
2712 // need to understand them all.
2714 if (Stream.AtEndOfStream())
2715 return std::error_code();
2717 BitstreamEntry Entry =
2718 Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
2720 switch (Entry.Kind) {
2721 case BitstreamEntry::Error:
2722 return Error("Malformed block");
2723 case BitstreamEntry::EndBlock:
2724 return std::error_code();
2726 case BitstreamEntry::SubBlock:
2728 case bitc::BLOCKINFO_BLOCK_ID:
2729 if (Stream.ReadBlockInfoBlock())
2730 return Error("Malformed block");
2732 case bitc::MODULE_BLOCK_ID:
2733 // Reject multiple MODULE_BLOCK's in a single bitstream.
2735 return Error("Invalid multiple blocks");
2737 if (std::error_code EC = ParseModule(false, ShouldLazyLoadMetadata))
2740 return std::error_code();
2743 if (Stream.SkipBlock())
2744 return Error("Invalid record");
2748 case BitstreamEntry::Record:
2749 // There should be no records in the top-level of blocks.
2751 // The ranlib in Xcode 4 will align archive members by appending newlines
2752 // to the end of them. If this file size is a multiple of 4 but not 8, we
2753 // have to read and ignore these final 4 bytes :-(
2754 if (Stream.getAbbrevIDWidth() == 2 && Entry.ID == 2 &&
2755 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
2756 Stream.AtEndOfStream())
2757 return std::error_code();
2759 return Error("Invalid record");
2764 ErrorOr<std::string> BitcodeReader::parseModuleTriple() {
2765 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
2766 return Error("Invalid record");
2768 SmallVector<uint64_t, 64> Record;
2771 // Read all the records for this module.
2773 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2775 switch (Entry.Kind) {
2776 case BitstreamEntry::SubBlock: // Handled for us already.
2777 case BitstreamEntry::Error:
2778 return Error("Malformed block");
2779 case BitstreamEntry::EndBlock:
2781 case BitstreamEntry::Record:
2782 // The interesting case.
2787 switch (Stream.readRecord(Entry.ID, Record)) {
2788 default: break; // Default behavior, ignore unknown content.
2789 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
2791 if (ConvertToString(Record, 0, S))
2792 return Error("Invalid record");
2799 llvm_unreachable("Exit infinite loop");
2802 ErrorOr<std::string> BitcodeReader::parseTriple() {
2803 if (std::error_code EC = InitStream())
2806 // Sniff for the signature.
2807 if (Stream.Read(8) != 'B' ||
2808 Stream.Read(8) != 'C' ||
2809 Stream.Read(4) != 0x0 ||
2810 Stream.Read(4) != 0xC ||
2811 Stream.Read(4) != 0xE ||
2812 Stream.Read(4) != 0xD)
2813 return Error("Invalid bitcode signature");
2815 // We expect a number of well-defined blocks, though we don't necessarily
2816 // need to understand them all.
2818 BitstreamEntry Entry = Stream.advance();
2820 switch (Entry.Kind) {
2821 case BitstreamEntry::Error:
2822 return Error("Malformed block");
2823 case BitstreamEntry::EndBlock:
2824 return std::error_code();
2826 case BitstreamEntry::SubBlock:
2827 if (Entry.ID == bitc::MODULE_BLOCK_ID)
2828 return parseModuleTriple();
2830 // Ignore other sub-blocks.
2831 if (Stream.SkipBlock())
2832 return Error("Malformed block");
2835 case BitstreamEntry::Record:
2836 Stream.skipRecord(Entry.ID);
2842 /// ParseMetadataAttachment - Parse metadata attachments.
2843 std::error_code BitcodeReader::ParseMetadataAttachment() {
2844 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
2845 return Error("Invalid record");
2847 SmallVector<uint64_t, 64> Record;
2849 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
2851 switch (Entry.Kind) {
2852 case BitstreamEntry::SubBlock: // Handled for us already.
2853 case BitstreamEntry::Error:
2854 return Error("Malformed block");
2855 case BitstreamEntry::EndBlock:
2856 return std::error_code();
2857 case BitstreamEntry::Record:
2858 // The interesting case.
2862 // Read a metadata attachment record.
2864 switch (Stream.readRecord(Entry.ID, Record)) {
2865 default: // Default behavior: ignore.
2867 case bitc::METADATA_ATTACHMENT: {
2868 unsigned RecordLength = Record.size();
2869 if (Record.empty() || (RecordLength - 1) % 2 == 1)
2870 return Error("Invalid record");
2871 Instruction *Inst = InstructionList[Record[0]];
2872 for (unsigned i = 1; i != RecordLength; i = i+2) {
2873 unsigned Kind = Record[i];
2874 DenseMap<unsigned, unsigned>::iterator I =
2875 MDKindMap.find(Kind);
2876 if (I == MDKindMap.end())
2877 return Error("Invalid ID");
2878 Metadata *Node = MDValueList.getValueFwdRef(Record[i + 1]);
2879 if (isa<LocalAsMetadata>(Node))
2880 // Drop the attachment. This used to be legal, but there's no
2883 Inst->setMetadata(I->second, cast<MDNode>(Node));
2884 if (I->second == LLVMContext::MD_tbaa)
2885 InstsWithTBAATag.push_back(Inst);
2893 /// ParseFunctionBody - Lazily parse the specified function body block.
2894 std::error_code BitcodeReader::ParseFunctionBody(Function *F) {
2895 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
2896 return Error("Invalid record");
2898 InstructionList.clear();
2899 unsigned ModuleValueListSize = ValueList.size();
2900 unsigned ModuleMDValueListSize = MDValueList.size();
2902 // Add all the function arguments to the value table.
2903 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
2904 ValueList.push_back(I);
2906 unsigned NextValueNo = ValueList.size();
2907 BasicBlock *CurBB = nullptr;
2908 unsigned CurBBNo = 0;
2911 auto getLastInstruction = [&]() -> Instruction * {
2912 if (CurBB && !CurBB->empty())
2913 return &CurBB->back();
2914 else if (CurBBNo && FunctionBBs[CurBBNo - 1] &&
2915 !FunctionBBs[CurBBNo - 1]->empty())
2916 return &FunctionBBs[CurBBNo - 1]->back();
2920 // Read all the records.
2921 SmallVector<uint64_t, 64> Record;
2923 BitstreamEntry Entry = Stream.advance();
2925 switch (Entry.Kind) {
2926 case BitstreamEntry::Error:
2927 return Error("Malformed block");
2928 case BitstreamEntry::EndBlock:
2929 goto OutOfRecordLoop;
2931 case BitstreamEntry::SubBlock:
2933 default: // Skip unknown content.
2934 if (Stream.SkipBlock())
2935 return Error("Invalid record");
2937 case bitc::CONSTANTS_BLOCK_ID:
2938 if (std::error_code EC = ParseConstants())
2940 NextValueNo = ValueList.size();
2942 case bitc::VALUE_SYMTAB_BLOCK_ID:
2943 if (std::error_code EC = ParseValueSymbolTable())
2946 case bitc::METADATA_ATTACHMENT_ID:
2947 if (std::error_code EC = ParseMetadataAttachment())
2950 case bitc::METADATA_BLOCK_ID:
2951 if (std::error_code EC = ParseMetadata())
2954 case bitc::USELIST_BLOCK_ID:
2955 if (std::error_code EC = ParseUseLists())
2961 case BitstreamEntry::Record:
2962 // The interesting case.
2968 Instruction *I = nullptr;
2969 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
2971 default: // Default behavior: reject
2972 return Error("Invalid value");
2973 case bitc::FUNC_CODE_DECLAREBLOCKS: { // DECLAREBLOCKS: [nblocks]
2974 if (Record.size() < 1 || Record[0] == 0)
2975 return Error("Invalid record");
2976 // Create all the basic blocks for the function.
2977 FunctionBBs.resize(Record[0]);
2979 // See if anything took the address of blocks in this function.
2980 auto BBFRI = BasicBlockFwdRefs.find(F);
2981 if (BBFRI == BasicBlockFwdRefs.end()) {
2982 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
2983 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
2985 auto &BBRefs = BBFRI->second;
2986 // Check for invalid basic block references.
2987 if (BBRefs.size() > FunctionBBs.size())
2988 return Error("Invalid ID");
2989 assert(!BBRefs.empty() && "Unexpected empty array");
2990 assert(!BBRefs.front() && "Invalid reference to entry block");
2991 for (unsigned I = 0, E = FunctionBBs.size(), RE = BBRefs.size(); I != E;
2993 if (I < RE && BBRefs[I]) {
2994 BBRefs[I]->insertInto(F);
2995 FunctionBBs[I] = BBRefs[I];
2997 FunctionBBs[I] = BasicBlock::Create(Context, "", F);
3000 // Erase from the table.
3001 BasicBlockFwdRefs.erase(BBFRI);
3004 CurBB = FunctionBBs[0];
3008 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
3009 // This record indicates that the last instruction is at the same
3010 // location as the previous instruction with a location.
3011 I = getLastInstruction();
3014 return Error("Invalid record");
3015 I->setDebugLoc(LastLoc);
3019 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
3020 I = getLastInstruction();
3021 if (!I || Record.size() < 4)
3022 return Error("Invalid record");
3024 unsigned Line = Record[0], Col = Record[1];
3025 unsigned ScopeID = Record[2], IAID = Record[3];
3027 MDNode *Scope = nullptr, *IA = nullptr;
3028 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
3029 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
3030 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
3031 I->setDebugLoc(LastLoc);
3036 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
3039 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3040 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3041 OpNum+1 > Record.size())
3042 return Error("Invalid record");
3044 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
3046 return Error("Invalid record");
3047 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
3048 InstructionList.push_back(I);
3049 if (OpNum < Record.size()) {
3050 if (Opc == Instruction::Add ||
3051 Opc == Instruction::Sub ||
3052 Opc == Instruction::Mul ||
3053 Opc == Instruction::Shl) {
3054 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
3055 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
3056 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
3057 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
3058 } else if (Opc == Instruction::SDiv ||
3059 Opc == Instruction::UDiv ||
3060 Opc == Instruction::LShr ||
3061 Opc == Instruction::AShr) {
3062 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
3063 cast<BinaryOperator>(I)->setIsExact(true);
3064 } else if (isa<FPMathOperator>(I)) {
3066 if (0 != (Record[OpNum] & FastMathFlags::UnsafeAlgebra))
3067 FMF.setUnsafeAlgebra();
3068 if (0 != (Record[OpNum] & FastMathFlags::NoNaNs))
3070 if (0 != (Record[OpNum] & FastMathFlags::NoInfs))
3072 if (0 != (Record[OpNum] & FastMathFlags::NoSignedZeros))
3073 FMF.setNoSignedZeros();
3074 if (0 != (Record[OpNum] & FastMathFlags::AllowReciprocal))
3075 FMF.setAllowReciprocal();
3077 I->setFastMathFlags(FMF);
3083 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
3086 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3087 OpNum+2 != Record.size())
3088 return Error("Invalid record");
3090 Type *ResTy = getTypeByID(Record[OpNum]);
3091 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
3092 if (Opc == -1 || !ResTy)
3093 return Error("Invalid record");
3094 Instruction *Temp = nullptr;
3095 if ((I = UpgradeBitCastInst(Opc, Op, ResTy, Temp))) {
3097 InstructionList.push_back(Temp);
3098 CurBB->getInstList().push_back(Temp);
3101 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
3103 InstructionList.push_back(I);
3106 case bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD:
3107 case bitc::FUNC_CODE_INST_GEP_OLD:
3108 case bitc::FUNC_CODE_INST_GEP: { // GEP: type, [n x operands]
3114 if (BitCode == bitc::FUNC_CODE_INST_GEP) {
3115 InBounds = Record[OpNum++];
3116 Ty = getTypeByID(Record[OpNum++]);
3118 InBounds = BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP_OLD;
3123 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
3124 return Error("Invalid record");
3128 cast<SequentialType>(BasePtr->getType()->getScalarType())
3131 "Explicit gep type does not match pointee type of pointer operand");
3133 SmallVector<Value*, 16> GEPIdx;
3134 while (OpNum != Record.size()) {
3136 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3137 return Error("Invalid record");
3138 GEPIdx.push_back(Op);
3141 I = GetElementPtrInst::Create(Ty, BasePtr, GEPIdx);
3143 InstructionList.push_back(I);
3145 cast<GetElementPtrInst>(I)->setIsInBounds(true);
3149 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
3150 // EXTRACTVAL: [opty, opval, n x indices]
3153 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3154 return Error("Invalid record");
3156 SmallVector<unsigned, 4> EXTRACTVALIdx;
3157 Type *CurTy = Agg->getType();
3158 for (unsigned RecSize = Record.size();
3159 OpNum != RecSize; ++OpNum) {
3160 bool IsArray = CurTy->isArrayTy();
3161 bool IsStruct = CurTy->isStructTy();
3162 uint64_t Index = Record[OpNum];
3164 if (!IsStruct && !IsArray)
3165 return Error("EXTRACTVAL: Invalid type");
3166 if ((unsigned)Index != Index)
3167 return Error("Invalid value");
3168 if (IsStruct && Index >= CurTy->subtypes().size())
3169 return Error("EXTRACTVAL: Invalid struct index");
3170 if (IsArray && Index >= CurTy->getArrayNumElements())
3171 return Error("EXTRACTVAL: Invalid array index");
3172 EXTRACTVALIdx.push_back((unsigned)Index);
3175 CurTy = CurTy->subtypes()[Index];
3177 CurTy = CurTy->subtypes()[0];
3180 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
3181 InstructionList.push_back(I);
3185 case bitc::FUNC_CODE_INST_INSERTVAL: {
3186 // INSERTVAL: [opty, opval, opty, opval, n x indices]
3189 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
3190 return Error("Invalid record");
3192 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
3193 return Error("Invalid record");
3195 SmallVector<unsigned, 4> INSERTVALIdx;
3196 Type *CurTy = Agg->getType();
3197 for (unsigned RecSize = Record.size();
3198 OpNum != RecSize; ++OpNum) {
3199 bool IsArray = CurTy->isArrayTy();
3200 bool IsStruct = CurTy->isStructTy();
3201 uint64_t Index = Record[OpNum];
3203 if (!IsStruct && !IsArray)
3204 return Error("INSERTVAL: Invalid type");
3205 if (!CurTy->isStructTy() && !CurTy->isArrayTy())
3206 return Error("Invalid type");
3207 if ((unsigned)Index != Index)
3208 return Error("Invalid value");
3209 if (IsStruct && Index >= CurTy->subtypes().size())
3210 return Error("INSERTVAL: Invalid struct index");
3211 if (IsArray && Index >= CurTy->getArrayNumElements())
3212 return Error("INSERTVAL: Invalid array index");
3214 INSERTVALIdx.push_back((unsigned)Index);
3216 CurTy = CurTy->subtypes()[Index];
3218 CurTy = CurTy->subtypes()[0];
3221 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
3222 InstructionList.push_back(I);
3226 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
3227 // obsolete form of select
3228 // handles select i1 ... in old bitcode
3230 Value *TrueVal, *FalseVal, *Cond;
3231 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3232 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3233 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
3234 return Error("Invalid record");
3236 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3237 InstructionList.push_back(I);
3241 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
3242 // new form of select
3243 // handles select i1 or select [N x i1]
3245 Value *TrueVal, *FalseVal, *Cond;
3246 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
3247 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
3248 getValueTypePair(Record, OpNum, NextValueNo, Cond))
3249 return Error("Invalid record");
3251 // select condition can be either i1 or [N x i1]
3252 if (VectorType* vector_type =
3253 dyn_cast<VectorType>(Cond->getType())) {
3255 if (vector_type->getElementType() != Type::getInt1Ty(Context))
3256 return Error("Invalid type for value");
3259 if (Cond->getType() != Type::getInt1Ty(Context))
3260 return Error("Invalid type for value");
3263 I = SelectInst::Create(Cond, TrueVal, FalseVal);
3264 InstructionList.push_back(I);
3268 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
3271 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
3272 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3273 return Error("Invalid record");
3274 I = ExtractElementInst::Create(Vec, Idx);
3275 InstructionList.push_back(I);
3279 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
3281 Value *Vec, *Elt, *Idx;
3282 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
3283 popValue(Record, OpNum, NextValueNo,
3284 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
3285 getValueTypePair(Record, OpNum, NextValueNo, Idx))
3286 return Error("Invalid record");
3287 I = InsertElementInst::Create(Vec, Elt, Idx);
3288 InstructionList.push_back(I);
3292 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
3294 Value *Vec1, *Vec2, *Mask;
3295 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
3296 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
3297 return Error("Invalid record");
3299 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
3300 return Error("Invalid record");
3301 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
3302 InstructionList.push_back(I);
3306 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
3307 // Old form of ICmp/FCmp returning bool
3308 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
3309 // both legal on vectors but had different behaviour.
3310 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
3311 // FCmp/ICmp returning bool or vector of bool
3315 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
3316 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
3317 OpNum+1 != Record.size())
3318 return Error("Invalid record");
3320 if (LHS->getType()->isFPOrFPVectorTy())
3321 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
3323 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
3324 InstructionList.push_back(I);
3328 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
3330 unsigned Size = Record.size();
3332 I = ReturnInst::Create(Context);
3333 InstructionList.push_back(I);
3338 Value *Op = nullptr;
3339 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3340 return Error("Invalid record");
3341 if (OpNum != Record.size())
3342 return Error("Invalid record");
3344 I = ReturnInst::Create(Context, Op);
3345 InstructionList.push_back(I);
3348 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
3349 if (Record.size() != 1 && Record.size() != 3)
3350 return Error("Invalid record");
3351 BasicBlock *TrueDest = getBasicBlock(Record[0]);
3353 return Error("Invalid record");
3355 if (Record.size() == 1) {
3356 I = BranchInst::Create(TrueDest);
3357 InstructionList.push_back(I);
3360 BasicBlock *FalseDest = getBasicBlock(Record[1]);
3361 Value *Cond = getValue(Record, 2, NextValueNo,
3362 Type::getInt1Ty(Context));
3363 if (!FalseDest || !Cond)
3364 return Error("Invalid record");
3365 I = BranchInst::Create(TrueDest, FalseDest, Cond);
3366 InstructionList.push_back(I);
3370 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
3372 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
3373 // "New" SwitchInst format with case ranges. The changes to write this
3374 // format were reverted but we still recognize bitcode that uses it.
3375 // Hopefully someday we will have support for case ranges and can use
3376 // this format again.
3378 Type *OpTy = getTypeByID(Record[1]);
3379 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
3381 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
3382 BasicBlock *Default = getBasicBlock(Record[3]);
3383 if (!OpTy || !Cond || !Default)
3384 return Error("Invalid record");
3386 unsigned NumCases = Record[4];
3388 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3389 InstructionList.push_back(SI);
3391 unsigned CurIdx = 5;
3392 for (unsigned i = 0; i != NumCases; ++i) {
3393 SmallVector<ConstantInt*, 1> CaseVals;
3394 unsigned NumItems = Record[CurIdx++];
3395 for (unsigned ci = 0; ci != NumItems; ++ci) {
3396 bool isSingleNumber = Record[CurIdx++];
3399 unsigned ActiveWords = 1;
3400 if (ValueBitWidth > 64)
3401 ActiveWords = Record[CurIdx++];
3402 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
3404 CurIdx += ActiveWords;
3406 if (!isSingleNumber) {
3408 if (ValueBitWidth > 64)
3409 ActiveWords = Record[CurIdx++];
3411 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
3413 CurIdx += ActiveWords;
3415 // FIXME: It is not clear whether values in the range should be
3416 // compared as signed or unsigned values. The partially
3417 // implemented changes that used this format in the past used
3418 // unsigned comparisons.
3419 for ( ; Low.ule(High); ++Low)
3420 CaseVals.push_back(ConstantInt::get(Context, Low));
3422 CaseVals.push_back(ConstantInt::get(Context, Low));
3424 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
3425 for (SmallVector<ConstantInt*, 1>::iterator cvi = CaseVals.begin(),
3426 cve = CaseVals.end(); cvi != cve; ++cvi)
3427 SI->addCase(*cvi, DestBB);
3433 // Old SwitchInst format without case ranges.
3435 if (Record.size() < 3 || (Record.size() & 1) == 0)
3436 return Error("Invalid record");
3437 Type *OpTy = getTypeByID(Record[0]);
3438 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
3439 BasicBlock *Default = getBasicBlock(Record[2]);
3440 if (!OpTy || !Cond || !Default)
3441 return Error("Invalid record");
3442 unsigned NumCases = (Record.size()-3)/2;
3443 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
3444 InstructionList.push_back(SI);
3445 for (unsigned i = 0, e = NumCases; i != e; ++i) {
3446 ConstantInt *CaseVal =
3447 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
3448 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
3449 if (!CaseVal || !DestBB) {
3451 return Error("Invalid record");
3453 SI->addCase(CaseVal, DestBB);
3458 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
3459 if (Record.size() < 2)
3460 return Error("Invalid record");
3461 Type *OpTy = getTypeByID(Record[0]);
3462 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
3463 if (!OpTy || !Address)
3464 return Error("Invalid record");
3465 unsigned NumDests = Record.size()-2;
3466 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
3467 InstructionList.push_back(IBI);
3468 for (unsigned i = 0, e = NumDests; i != e; ++i) {
3469 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
3470 IBI->addDestination(DestBB);
3473 return Error("Invalid record");
3480 case bitc::FUNC_CODE_INST_INVOKE: {
3481 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
3482 if (Record.size() < 4)
3483 return Error("Invalid record");
3484 AttributeSet PAL = getAttributes(Record[0]);
3485 unsigned CCInfo = Record[1];
3486 BasicBlock *NormalBB = getBasicBlock(Record[2]);
3487 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
3491 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
3492 return Error("Invalid record");
3494 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
3495 FunctionType *FTy = !CalleeTy ? nullptr :
3496 dyn_cast<FunctionType>(CalleeTy->getElementType());
3498 // Check that the right number of fixed parameters are here.
3499 if (!FTy || !NormalBB || !UnwindBB ||
3500 Record.size() < OpNum+FTy->getNumParams())
3501 return Error("Invalid record");
3503 SmallVector<Value*, 16> Ops;
3504 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
3505 Ops.push_back(getValue(Record, OpNum, NextValueNo,
3506 FTy->getParamType(i)));
3508 return Error("Invalid record");
3511 if (!FTy->isVarArg()) {
3512 if (Record.size() != OpNum)
3513 return Error("Invalid record");
3515 // Read type/value pairs for varargs params.
3516 while (OpNum != Record.size()) {
3518 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3519 return Error("Invalid record");
3524 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
3525 InstructionList.push_back(I);
3526 cast<InvokeInst>(I)->setCallingConv(
3527 static_cast<CallingConv::ID>(CCInfo));
3528 cast<InvokeInst>(I)->setAttributes(PAL);
3531 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
3533 Value *Val = nullptr;
3534 if (getValueTypePair(Record, Idx, NextValueNo, Val))
3535 return Error("Invalid record");
3536 I = ResumeInst::Create(Val);
3537 InstructionList.push_back(I);
3540 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
3541 I = new UnreachableInst(Context);
3542 InstructionList.push_back(I);
3544 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
3545 if (Record.size() < 1 || ((Record.size()-1)&1))
3546 return Error("Invalid record");
3547 Type *Ty = getTypeByID(Record[0]);
3549 return Error("Invalid record");
3551 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
3552 InstructionList.push_back(PN);
3554 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
3556 // With the new function encoding, it is possible that operands have
3557 // negative IDs (for forward references). Use a signed VBR
3558 // representation to keep the encoding small.
3560 V = getValueSigned(Record, 1+i, NextValueNo, Ty);
3562 V = getValue(Record, 1+i, NextValueNo, Ty);
3563 BasicBlock *BB = getBasicBlock(Record[2+i]);
3565 return Error("Invalid record");
3566 PN->addIncoming(V, BB);
3572 case bitc::FUNC_CODE_INST_LANDINGPAD: {
3573 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
3575 if (Record.size() < 4)
3576 return Error("Invalid record");
3577 Type *Ty = getTypeByID(Record[Idx++]);
3579 return Error("Invalid record");
3580 Value *PersFn = nullptr;
3581 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
3582 return Error("Invalid record");
3584 bool IsCleanup = !!Record[Idx++];
3585 unsigned NumClauses = Record[Idx++];
3586 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
3587 LP->setCleanup(IsCleanup);
3588 for (unsigned J = 0; J != NumClauses; ++J) {
3589 LandingPadInst::ClauseType CT =
3590 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
3593 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
3595 return Error("Invalid record");
3598 assert((CT != LandingPadInst::Catch ||
3599 !isa<ArrayType>(Val->getType())) &&
3600 "Catch clause has a invalid type!");
3601 assert((CT != LandingPadInst::Filter ||
3602 isa<ArrayType>(Val->getType())) &&
3603 "Filter clause has invalid type!");
3604 LP->addClause(cast<Constant>(Val));
3608 InstructionList.push_back(I);
3612 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
3613 if (Record.size() != 4)
3614 return Error("Invalid record");
3616 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
3617 Type *OpTy = getTypeByID(Record[1]);
3618 Value *Size = getFnValueByID(Record[2], OpTy);
3619 uint64_t AlignRecord = Record[3];
3620 const uint64_t InAllocaMask = uint64_t(1) << 5;
3621 bool InAlloca = AlignRecord & InAllocaMask;
3623 if (std::error_code EC =
3624 parseAlignmentValue(AlignRecord & ~InAllocaMask, Align)) {
3628 return Error("Invalid record");
3629 AllocaInst *AI = new AllocaInst(Ty->getElementType(), Size, Align);
3630 AI->setUsedWithInAlloca(InAlloca);
3632 InstructionList.push_back(I);
3635 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
3638 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3639 (OpNum + 2 != Record.size() && OpNum + 3 != Record.size()))
3640 return Error("Invalid record");
3643 if (OpNum + 3 == Record.size())
3644 Ty = getTypeByID(Record[OpNum++]);
3647 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
3649 I = new LoadInst(Op, "", Record[OpNum+1], Align);
3651 if (Ty && Ty != I->getType())
3652 return Error("Explicit load type does not match pointee type of "
3655 InstructionList.push_back(I);
3658 case bitc::FUNC_CODE_INST_LOADATOMIC: {
3659 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
3662 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
3663 (OpNum + 4 != Record.size() && OpNum + 5 != Record.size()))
3664 return Error("Invalid record");
3667 if (OpNum + 5 == Record.size())
3668 Ty = getTypeByID(Record[OpNum++]);
3670 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
3671 if (Ordering == NotAtomic || Ordering == Release ||
3672 Ordering == AcquireRelease)
3673 return Error("Invalid record");
3674 if (Ordering != NotAtomic && Record[OpNum] == 0)
3675 return Error("Invalid record");
3676 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
3679 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
3681 I = new LoadInst(Op, "", Record[OpNum+1], Align, Ordering, SynchScope);
3684 assert((!Ty || Ty == I->getType()) &&
3685 "Explicit type doesn't match pointee type of the first operand");
3687 InstructionList.push_back(I);
3690 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
3693 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
3694 popValue(Record, OpNum, NextValueNo,
3695 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
3696 OpNum+2 != Record.size())
3697 return Error("Invalid record");
3699 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
3701 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align);
3702 InstructionList.push_back(I);
3705 case bitc::FUNC_CODE_INST_STOREATOMIC: {
3706 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
3709 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
3710 popValue(Record, OpNum, NextValueNo,
3711 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
3712 OpNum+4 != Record.size())
3713 return Error("Invalid record");
3715 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
3716 if (Ordering == NotAtomic || Ordering == Acquire ||
3717 Ordering == AcquireRelease)
3718 return Error("Invalid record");
3719 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
3720 if (Ordering != NotAtomic && Record[OpNum] == 0)
3721 return Error("Invalid record");
3724 if (std::error_code EC = parseAlignmentValue(Record[OpNum], Align))
3726 I = new StoreInst(Val, Ptr, Record[OpNum+1], Align, Ordering, SynchScope);
3727 InstructionList.push_back(I);
3730 case bitc::FUNC_CODE_INST_CMPXCHG: {
3731 // CMPXCHG:[ptrty, ptr, cmp, new, vol, successordering, synchscope,
3732 // failureordering?, isweak?]
3734 Value *Ptr, *Cmp, *New;
3735 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
3736 popValue(Record, OpNum, NextValueNo,
3737 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
3738 popValue(Record, OpNum, NextValueNo,
3739 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
3740 (Record.size() < OpNum + 3 || Record.size() > OpNum + 5))
3741 return Error("Invalid record");
3742 AtomicOrdering SuccessOrdering = GetDecodedOrdering(Record[OpNum+1]);
3743 if (SuccessOrdering == NotAtomic || SuccessOrdering == Unordered)
3744 return Error("Invalid record");
3745 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
3747 AtomicOrdering FailureOrdering;
3748 if (Record.size() < 7)
3750 AtomicCmpXchgInst::getStrongestFailureOrdering(SuccessOrdering);
3752 FailureOrdering = GetDecodedOrdering(Record[OpNum+3]);
3754 I = new AtomicCmpXchgInst(Ptr, Cmp, New, SuccessOrdering, FailureOrdering,
3756 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
3758 if (Record.size() < 8) {
3759 // Before weak cmpxchgs existed, the instruction simply returned the
3760 // value loaded from memory, so bitcode files from that era will be
3761 // expecting the first component of a modern cmpxchg.
3762 CurBB->getInstList().push_back(I);
3763 I = ExtractValueInst::Create(I, 0);
3765 cast<AtomicCmpXchgInst>(I)->setWeak(Record[OpNum+4]);
3768 InstructionList.push_back(I);
3771 case bitc::FUNC_CODE_INST_ATOMICRMW: {
3772 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
3775 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
3776 popValue(Record, OpNum, NextValueNo,
3777 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
3778 OpNum+4 != Record.size())
3779 return Error("Invalid record");
3780 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
3781 if (Operation < AtomicRMWInst::FIRST_BINOP ||
3782 Operation > AtomicRMWInst::LAST_BINOP)
3783 return Error("Invalid record");
3784 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
3785 if (Ordering == NotAtomic || Ordering == Unordered)
3786 return Error("Invalid record");
3787 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
3788 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
3789 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
3790 InstructionList.push_back(I);
3793 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
3794 if (2 != Record.size())
3795 return Error("Invalid record");
3796 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
3797 if (Ordering == NotAtomic || Ordering == Unordered ||
3798 Ordering == Monotonic)
3799 return Error("Invalid record");
3800 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
3801 I = new FenceInst(Context, Ordering, SynchScope);
3802 InstructionList.push_back(I);
3805 case bitc::FUNC_CODE_INST_CALL: {
3806 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
3807 if (Record.size() < 3)
3808 return Error("Invalid record");
3810 AttributeSet PAL = getAttributes(Record[0]);
3811 unsigned CCInfo = Record[1];
3815 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
3816 return Error("Invalid record");
3818 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
3819 FunctionType *FTy = nullptr;
3820 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
3821 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
3822 return Error("Invalid record");
3824 SmallVector<Value*, 16> Args;
3825 // Read the fixed params.
3826 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
3827 if (FTy->getParamType(i)->isLabelTy())
3828 Args.push_back(getBasicBlock(Record[OpNum]));
3830 Args.push_back(getValue(Record, OpNum, NextValueNo,
3831 FTy->getParamType(i)));
3833 return Error("Invalid record");
3836 // Read type/value pairs for varargs params.
3837 if (!FTy->isVarArg()) {
3838 if (OpNum != Record.size())
3839 return Error("Invalid record");
3841 while (OpNum != Record.size()) {
3843 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
3844 return Error("Invalid record");
3849 I = CallInst::Create(Callee, Args);
3850 InstructionList.push_back(I);
3851 cast<CallInst>(I)->setCallingConv(
3852 static_cast<CallingConv::ID>((~(1U << 14) & CCInfo) >> 1));
3853 CallInst::TailCallKind TCK = CallInst::TCK_None;
3855 TCK = CallInst::TCK_Tail;
3856 if (CCInfo & (1 << 14))
3857 TCK = CallInst::TCK_MustTail;
3858 cast<CallInst>(I)->setTailCallKind(TCK);
3859 cast<CallInst>(I)->setAttributes(PAL);
3862 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
3863 if (Record.size() < 3)
3864 return Error("Invalid record");
3865 Type *OpTy = getTypeByID(Record[0]);
3866 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
3867 Type *ResTy = getTypeByID(Record[2]);
3868 if (!OpTy || !Op || !ResTy)
3869 return Error("Invalid record");
3870 I = new VAArgInst(Op, ResTy);
3871 InstructionList.push_back(I);
3876 // Add instruction to end of current BB. If there is no current BB, reject
3880 return Error("Invalid instruction with no BB");
3882 CurBB->getInstList().push_back(I);
3884 // If this was a terminator instruction, move to the next block.
3885 if (isa<TerminatorInst>(I)) {
3887 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : nullptr;
3890 // Non-void values get registered in the value table for future use.
3891 if (I && !I->getType()->isVoidTy())
3892 ValueList.AssignValue(I, NextValueNo++);
3897 // Check the function list for unresolved values.
3898 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
3899 if (!A->getParent()) {
3900 // We found at least one unresolved value. Nuke them all to avoid leaks.
3901 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
3902 if ((A = dyn_cast_or_null<Argument>(ValueList[i])) && !A->getParent()) {
3903 A->replaceAllUsesWith(UndefValue::get(A->getType()));
3907 return Error("Never resolved value found in function");
3911 // FIXME: Check for unresolved forward-declared metadata references
3912 // and clean up leaks.
3914 // Trim the value list down to the size it was before we parsed this function.
3915 ValueList.shrinkTo(ModuleValueListSize);
3916 MDValueList.shrinkTo(ModuleMDValueListSize);
3917 std::vector<BasicBlock*>().swap(FunctionBBs);
3918 return std::error_code();
3921 /// Find the function body in the bitcode stream
3922 std::error_code BitcodeReader::FindFunctionInStream(
3924 DenseMap<Function *, uint64_t>::iterator DeferredFunctionInfoIterator) {
3925 while (DeferredFunctionInfoIterator->second == 0) {
3926 if (Stream.AtEndOfStream())
3927 return Error("Could not find function in stream");
3928 // ParseModule will parse the next body in the stream and set its
3929 // position in the DeferredFunctionInfo map.
3930 if (std::error_code EC = ParseModule(true))
3933 return std::error_code();
3936 //===----------------------------------------------------------------------===//
3937 // GVMaterializer implementation
3938 //===----------------------------------------------------------------------===//
3940 void BitcodeReader::releaseBuffer() { Buffer.release(); }
3942 std::error_code BitcodeReader::materialize(GlobalValue *GV) {
3943 if (std::error_code EC = materializeMetadata())
3946 Function *F = dyn_cast<Function>(GV);
3947 // If it's not a function or is already material, ignore the request.
3948 if (!F || !F->isMaterializable())
3949 return std::error_code();
3951 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
3952 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
3953 // If its position is recorded as 0, its body is somewhere in the stream
3954 // but we haven't seen it yet.
3955 if (DFII->second == 0 && LazyStreamer)
3956 if (std::error_code EC = FindFunctionInStream(F, DFII))
3959 // Move the bit stream to the saved position of the deferred function body.
3960 Stream.JumpToBit(DFII->second);
3962 if (std::error_code EC = ParseFunctionBody(F))
3964 F->setIsMaterializable(false);
3966 // Upgrade any old intrinsic calls in the function.
3967 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
3968 E = UpgradedIntrinsics.end(); I != E; ++I) {
3969 if (I->first != I->second) {
3970 for (auto UI = I->first->user_begin(), UE = I->first->user_end();
3972 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
3973 UpgradeIntrinsicCall(CI, I->second);
3978 // Bring in any functions that this function forward-referenced via
3980 return materializeForwardReferencedFunctions();
3983 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
3984 const Function *F = dyn_cast<Function>(GV);
3985 if (!F || F->isDeclaration())
3988 // Dematerializing F would leave dangling references that wouldn't be
3989 // reconnected on re-materialization.
3990 if (BlockAddressesTaken.count(F))
3993 return DeferredFunctionInfo.count(const_cast<Function*>(F));
3996 void BitcodeReader::Dematerialize(GlobalValue *GV) {
3997 Function *F = dyn_cast<Function>(GV);
3998 // If this function isn't dematerializable, this is a noop.
3999 if (!F || !isDematerializable(F))
4002 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
4004 // Just forget the function body, we can remat it later.
4005 F->dropAllReferences();
4006 F->setIsMaterializable(true);
4009 std::error_code BitcodeReader::MaterializeModule(Module *M) {
4010 assert(M == TheModule &&
4011 "Can only Materialize the Module this BitcodeReader is attached to.");
4013 if (std::error_code EC = materializeMetadata())
4016 // Promise to materialize all forward references.
4017 WillMaterializeAllForwardRefs = true;
4019 // Iterate over the module, deserializing any functions that are still on
4021 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
4023 if (std::error_code EC = materialize(F))
4026 // At this point, if there are any function bodies, the current bit is
4027 // pointing to the END_BLOCK record after them. Now make sure the rest
4028 // of the bits in the module have been read.
4032 // Check that all block address forward references got resolved (as we
4034 if (!BasicBlockFwdRefs.empty())
4035 return Error("Never resolved function from blockaddress");
4037 // Upgrade any intrinsic calls that slipped through (should not happen!) and
4038 // delete the old functions to clean up. We can't do this unless the entire
4039 // module is materialized because there could always be another function body
4040 // with calls to the old function.
4041 for (std::vector<std::pair<Function*, Function*> >::iterator I =
4042 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
4043 if (I->first != I->second) {
4044 for (auto UI = I->first->user_begin(), UE = I->first->user_end();
4046 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
4047 UpgradeIntrinsicCall(CI, I->second);
4049 if (!I->first->use_empty())
4050 I->first->replaceAllUsesWith(I->second);
4051 I->first->eraseFromParent();
4054 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
4056 for (unsigned I = 0, E = InstsWithTBAATag.size(); I < E; I++)
4057 UpgradeInstWithTBAATag(InstsWithTBAATag[I]);
4059 UpgradeDebugInfo(*M);
4060 return std::error_code();
4063 std::vector<StructType *> BitcodeReader::getIdentifiedStructTypes() const {
4064 return IdentifiedStructTypes;
4067 std::error_code BitcodeReader::InitStream() {
4069 return InitLazyStream();
4070 return InitStreamFromBuffer();
4073 std::error_code BitcodeReader::InitStreamFromBuffer() {
4074 const unsigned char *BufPtr = (const unsigned char*)Buffer->getBufferStart();
4075 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
4077 if (Buffer->getBufferSize() & 3)
4078 return Error("Invalid bitcode signature");
4080 // If we have a wrapper header, parse it and ignore the non-bc file contents.
4081 // The magic number is 0x0B17C0DE stored in little endian.
4082 if (isBitcodeWrapper(BufPtr, BufEnd))
4083 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
4084 return Error("Invalid bitcode wrapper header");
4086 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
4087 Stream.init(&*StreamFile);
4089 return std::error_code();
4092 std::error_code BitcodeReader::InitLazyStream() {
4093 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
4095 auto OwnedBytes = llvm::make_unique<StreamingMemoryObject>(LazyStreamer);
4096 StreamingMemoryObject &Bytes = *OwnedBytes;
4097 StreamFile = llvm::make_unique<BitstreamReader>(std::move(OwnedBytes));
4098 Stream.init(&*StreamFile);
4100 unsigned char buf[16];
4101 if (Bytes.readBytes(buf, 16, 0) != 16)
4102 return Error("Invalid bitcode signature");
4104 if (!isBitcode(buf, buf + 16))
4105 return Error("Invalid bitcode signature");
4107 if (isBitcodeWrapper(buf, buf + 4)) {
4108 const unsigned char *bitcodeStart = buf;
4109 const unsigned char *bitcodeEnd = buf + 16;
4110 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
4111 Bytes.dropLeadingBytes(bitcodeStart - buf);
4112 Bytes.setKnownObjectSize(bitcodeEnd - bitcodeStart);
4114 return std::error_code();
4118 class BitcodeErrorCategoryType : public std::error_category {
4119 const char *name() const LLVM_NOEXCEPT override {
4120 return "llvm.bitcode";
4122 std::string message(int IE) const override {
4123 BitcodeError E = static_cast<BitcodeError>(IE);
4125 case BitcodeError::InvalidBitcodeSignature:
4126 return "Invalid bitcode signature";
4127 case BitcodeError::CorruptedBitcode:
4128 return "Corrupted bitcode";
4130 llvm_unreachable("Unknown error type!");
4135 static ManagedStatic<BitcodeErrorCategoryType> ErrorCategory;
4137 const std::error_category &llvm::BitcodeErrorCategory() {
4138 return *ErrorCategory;
4141 //===----------------------------------------------------------------------===//
4142 // External interface
4143 //===----------------------------------------------------------------------===//
4145 /// \brief Get a lazy one-at-time loading module from bitcode.
4147 /// This isn't always used in a lazy context. In particular, it's also used by
4148 /// \a parseBitcodeFile(). If this is truly lazy, then we need to eagerly pull
4149 /// in forward-referenced functions from block address references.
4151 /// \param[in] WillMaterializeAll Set to \c true if the caller promises to
4152 /// materialize everything -- in particular, if this isn't truly lazy.
4153 static ErrorOr<Module *>
4154 getLazyBitcodeModuleImpl(std::unique_ptr<MemoryBuffer> &&Buffer,
4155 LLVMContext &Context, bool WillMaterializeAll,
4156 DiagnosticHandlerFunction DiagnosticHandler,
4157 bool ShouldLazyLoadMetadata = false) {
4158 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
4160 new BitcodeReader(Buffer.get(), Context, DiagnosticHandler);
4161 M->setMaterializer(R);
4163 auto cleanupOnError = [&](std::error_code EC) {
4164 R->releaseBuffer(); // Never take ownership on error.
4165 delete M; // Also deletes R.
4169 // Delay parsing Metadata if ShouldLazyLoadMetadata is true.
4170 if (std::error_code EC = R->ParseBitcodeInto(M, ShouldLazyLoadMetadata))
4171 return cleanupOnError(EC);
4173 if (!WillMaterializeAll)
4174 // Resolve forward references from blockaddresses.
4175 if (std::error_code EC = R->materializeForwardReferencedFunctions())
4176 return cleanupOnError(EC);
4178 Buffer.release(); // The BitcodeReader owns it now.
4183 llvm::getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &&Buffer,
4184 LLVMContext &Context,
4185 DiagnosticHandlerFunction DiagnosticHandler,
4186 bool ShouldLazyLoadMetadata) {
4187 return getLazyBitcodeModuleImpl(std::move(Buffer), Context, false,
4188 DiagnosticHandler, ShouldLazyLoadMetadata);
4191 ErrorOr<std::unique_ptr<Module>>
4192 llvm::getStreamedBitcodeModule(StringRef Name, DataStreamer *Streamer,
4193 LLVMContext &Context,
4194 DiagnosticHandlerFunction DiagnosticHandler) {
4195 std::unique_ptr<Module> M = make_unique<Module>(Name, Context);
4196 BitcodeReader *R = new BitcodeReader(Streamer, Context, DiagnosticHandler);
4197 M->setMaterializer(R);
4198 if (std::error_code EC = R->ParseBitcodeInto(M.get()))
4200 return std::move(M);
4204 llvm::parseBitcodeFile(MemoryBufferRef Buffer, LLVMContext &Context,
4205 DiagnosticHandlerFunction DiagnosticHandler) {
4206 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
4207 ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModuleImpl(
4208 std::move(Buf), Context, true, DiagnosticHandler);
4211 Module *M = ModuleOrErr.get();
4212 // Read in the entire module, and destroy the BitcodeReader.
4213 if (std::error_code EC = M->materializeAllPermanently()) {
4218 // TODO: Restore the use-lists to the in-memory state when the bitcode was
4219 // written. We must defer until the Module has been fully materialized.
4225 llvm::getBitcodeTargetTriple(MemoryBufferRef Buffer, LLVMContext &Context,
4226 DiagnosticHandlerFunction DiagnosticHandler) {
4227 std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
4228 auto R = llvm::make_unique<BitcodeReader>(Buf.release(), Context,
4230 ErrorOr<std::string> Triple = R->parseTriple();
4231 if (Triple.getError())
4233 return Triple.get();