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/SmallString.h"
13 #include "llvm/ADT/SmallVector.h"
14 #include "llvm/AutoUpgrade.h"
15 #include "llvm/IR/Constants.h"
16 #include "llvm/IR/DerivedTypes.h"
17 #include "llvm/IR/InlineAsm.h"
18 #include "llvm/IR/IntrinsicInst.h"
19 #include "llvm/IR/Module.h"
20 #include "llvm/IR/OperandTraits.h"
21 #include "llvm/IR/Operator.h"
22 #include "llvm/Support/DataStream.h"
23 #include "llvm/Support/MathExtras.h"
24 #include "llvm/Support/MemoryBuffer.h"
28 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
31 void BitcodeReader::materializeForwardReferencedFunctions() {
32 while (!BlockAddrFwdRefs.empty()) {
33 Function *F = BlockAddrFwdRefs.begin()->first;
38 void BitcodeReader::FreeState() {
42 std::vector<Type*>().swap(TypeList);
46 std::vector<AttributeSet>().swap(MAttributes);
47 std::vector<BasicBlock*>().swap(FunctionBBs);
48 std::vector<Function*>().swap(FunctionsWithBodies);
49 DeferredFunctionInfo.clear();
52 assert(BlockAddrFwdRefs.empty() && "Unresolved blockaddress fwd references");
55 //===----------------------------------------------------------------------===//
56 // Helper functions to implement forward reference resolution, etc.
57 //===----------------------------------------------------------------------===//
59 /// ConvertToString - Convert a string from a record into an std::string, return
61 template<typename StrTy>
62 static bool ConvertToString(ArrayRef<uint64_t> Record, unsigned Idx,
64 if (Idx > Record.size())
67 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
68 Result += (char)Record[i];
72 static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
74 default: // Map unknown/new linkages to external
75 case 0: return GlobalValue::ExternalLinkage;
76 case 1: return GlobalValue::WeakAnyLinkage;
77 case 2: return GlobalValue::AppendingLinkage;
78 case 3: return GlobalValue::InternalLinkage;
79 case 4: return GlobalValue::LinkOnceAnyLinkage;
80 case 5: return GlobalValue::DLLImportLinkage;
81 case 6: return GlobalValue::DLLExportLinkage;
82 case 7: return GlobalValue::ExternalWeakLinkage;
83 case 8: return GlobalValue::CommonLinkage;
84 case 9: return GlobalValue::PrivateLinkage;
85 case 10: return GlobalValue::WeakODRLinkage;
86 case 11: return GlobalValue::LinkOnceODRLinkage;
87 case 12: return GlobalValue::AvailableExternallyLinkage;
88 case 13: return GlobalValue::LinkerPrivateLinkage;
89 case 14: return GlobalValue::LinkerPrivateWeakLinkage;
90 case 15: return GlobalValue::LinkOnceODRAutoHideLinkage;
94 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
96 default: // Map unknown visibilities to default.
97 case 0: return GlobalValue::DefaultVisibility;
98 case 1: return GlobalValue::HiddenVisibility;
99 case 2: return GlobalValue::ProtectedVisibility;
103 static GlobalVariable::ThreadLocalMode GetDecodedThreadLocalMode(unsigned Val) {
105 case 0: return GlobalVariable::NotThreadLocal;
106 default: // Map unknown non-zero value to general dynamic.
107 case 1: return GlobalVariable::GeneralDynamicTLSModel;
108 case 2: return GlobalVariable::LocalDynamicTLSModel;
109 case 3: return GlobalVariable::InitialExecTLSModel;
110 case 4: return GlobalVariable::LocalExecTLSModel;
114 static int GetDecodedCastOpcode(unsigned Val) {
117 case bitc::CAST_TRUNC : return Instruction::Trunc;
118 case bitc::CAST_ZEXT : return Instruction::ZExt;
119 case bitc::CAST_SEXT : return Instruction::SExt;
120 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
121 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
122 case bitc::CAST_UITOFP : return Instruction::UIToFP;
123 case bitc::CAST_SITOFP : return Instruction::SIToFP;
124 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
125 case bitc::CAST_FPEXT : return Instruction::FPExt;
126 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
127 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
128 case bitc::CAST_BITCAST : return Instruction::BitCast;
131 static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
134 case bitc::BINOP_ADD:
135 return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
136 case bitc::BINOP_SUB:
137 return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
138 case bitc::BINOP_MUL:
139 return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
140 case bitc::BINOP_UDIV: return Instruction::UDiv;
141 case bitc::BINOP_SDIV:
142 return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
143 case bitc::BINOP_UREM: return Instruction::URem;
144 case bitc::BINOP_SREM:
145 return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
146 case bitc::BINOP_SHL: return Instruction::Shl;
147 case bitc::BINOP_LSHR: return Instruction::LShr;
148 case bitc::BINOP_ASHR: return Instruction::AShr;
149 case bitc::BINOP_AND: return Instruction::And;
150 case bitc::BINOP_OR: return Instruction::Or;
151 case bitc::BINOP_XOR: return Instruction::Xor;
155 static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
157 default: return AtomicRMWInst::BAD_BINOP;
158 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
159 case bitc::RMW_ADD: return AtomicRMWInst::Add;
160 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
161 case bitc::RMW_AND: return AtomicRMWInst::And;
162 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
163 case bitc::RMW_OR: return AtomicRMWInst::Or;
164 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
165 case bitc::RMW_MAX: return AtomicRMWInst::Max;
166 case bitc::RMW_MIN: return AtomicRMWInst::Min;
167 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
168 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
172 static AtomicOrdering GetDecodedOrdering(unsigned Val) {
174 case bitc::ORDERING_NOTATOMIC: return NotAtomic;
175 case bitc::ORDERING_UNORDERED: return Unordered;
176 case bitc::ORDERING_MONOTONIC: return Monotonic;
177 case bitc::ORDERING_ACQUIRE: return Acquire;
178 case bitc::ORDERING_RELEASE: return Release;
179 case bitc::ORDERING_ACQREL: return AcquireRelease;
180 default: // Map unknown orderings to sequentially-consistent.
181 case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
185 static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
187 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
188 default: // Map unknown scopes to cross-thread.
189 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
195 /// @brief A class for maintaining the slot number definition
196 /// as a placeholder for the actual definition for forward constants defs.
197 class ConstantPlaceHolder : public ConstantExpr {
198 void operator=(const ConstantPlaceHolder &) LLVM_DELETED_FUNCTION;
200 // allocate space for exactly one operand
201 void *operator new(size_t s) {
202 return User::operator new(s, 1);
204 explicit ConstantPlaceHolder(Type *Ty, LLVMContext& Context)
205 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
206 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
209 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
210 static bool classof(const Value *V) {
211 return isa<ConstantExpr>(V) &&
212 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
216 /// Provide fast operand accessors
217 //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
221 // FIXME: can we inherit this from ConstantExpr?
223 struct OperandTraits<ConstantPlaceHolder> :
224 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
229 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
238 WeakVH &OldV = ValuePtrs[Idx];
244 // Handle constants and non-constants (e.g. instrs) differently for
246 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
247 ResolveConstants.push_back(std::make_pair(PHC, Idx));
250 // If there was a forward reference to this value, replace it.
251 Value *PrevVal = OldV;
252 OldV->replaceAllUsesWith(V);
258 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
263 if (Value *V = ValuePtrs[Idx]) {
264 assert(Ty == V->getType() && "Type mismatch in constant table!");
265 return cast<Constant>(V);
268 // Create and return a placeholder, which will later be RAUW'd.
269 Constant *C = new ConstantPlaceHolder(Ty, Context);
274 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, Type *Ty) {
278 if (Value *V = ValuePtrs[Idx]) {
279 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
283 // No type specified, must be invalid reference.
284 if (Ty == 0) return 0;
286 // Create and return a placeholder, which will later be RAUW'd.
287 Value *V = new Argument(Ty);
292 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
293 /// resolves any forward references. The idea behind this is that we sometimes
294 /// get constants (such as large arrays) which reference *many* forward ref
295 /// constants. Replacing each of these causes a lot of thrashing when
296 /// building/reuniquing the constant. Instead of doing this, we look at all the
297 /// uses and rewrite all the place holders at once for any constant that uses
299 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
300 // Sort the values by-pointer so that they are efficient to look up with a
302 std::sort(ResolveConstants.begin(), ResolveConstants.end());
304 SmallVector<Constant*, 64> NewOps;
306 while (!ResolveConstants.empty()) {
307 Value *RealVal = operator[](ResolveConstants.back().second);
308 Constant *Placeholder = ResolveConstants.back().first;
309 ResolveConstants.pop_back();
311 // Loop over all users of the placeholder, updating them to reference the
312 // new value. If they reference more than one placeholder, update them all
314 while (!Placeholder->use_empty()) {
315 Value::use_iterator UI = Placeholder->use_begin();
318 // If the using object isn't uniqued, just update the operands. This
319 // handles instructions and initializers for global variables.
320 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
321 UI.getUse().set(RealVal);
325 // Otherwise, we have a constant that uses the placeholder. Replace that
326 // constant with a new constant that has *all* placeholder uses updated.
327 Constant *UserC = cast<Constant>(U);
328 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
331 if (!isa<ConstantPlaceHolder>(*I)) {
332 // Not a placeholder reference.
334 } else if (*I == Placeholder) {
335 // Common case is that it just references this one placeholder.
338 // Otherwise, look up the placeholder in ResolveConstants.
339 ResolveConstantsTy::iterator It =
340 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
341 std::pair<Constant*, unsigned>(cast<Constant>(*I),
343 assert(It != ResolveConstants.end() && It->first == *I);
344 NewOp = operator[](It->second);
347 NewOps.push_back(cast<Constant>(NewOp));
350 // Make the new constant.
352 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
353 NewC = ConstantArray::get(UserCA->getType(), NewOps);
354 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
355 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
356 } else if (isa<ConstantVector>(UserC)) {
357 NewC = ConstantVector::get(NewOps);
359 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
360 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
363 UserC->replaceAllUsesWith(NewC);
364 UserC->destroyConstant();
368 // Update all ValueHandles, they should be the only users at this point.
369 Placeholder->replaceAllUsesWith(RealVal);
374 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
383 WeakVH &OldV = MDValuePtrs[Idx];
389 // If there was a forward reference to this value, replace it.
390 MDNode *PrevVal = cast<MDNode>(OldV);
391 OldV->replaceAllUsesWith(V);
392 MDNode::deleteTemporary(PrevVal);
393 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
395 MDValuePtrs[Idx] = V;
398 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
402 if (Value *V = MDValuePtrs[Idx]) {
403 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
407 // Create and return a placeholder, which will later be RAUW'd.
408 Value *V = MDNode::getTemporary(Context, ArrayRef<Value*>());
409 MDValuePtrs[Idx] = V;
413 Type *BitcodeReader::getTypeByID(unsigned ID) {
414 // The type table size is always specified correctly.
415 if (ID >= TypeList.size())
418 if (Type *Ty = TypeList[ID])
421 // If we have a forward reference, the only possible case is when it is to a
422 // named struct. Just create a placeholder for now.
423 return TypeList[ID] = StructType::create(Context);
427 //===----------------------------------------------------------------------===//
428 // Functions for parsing blocks from the bitcode file
429 //===----------------------------------------------------------------------===//
431 bool BitcodeReader::ParseAttributeBlock() {
432 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
433 return Error("Malformed block record");
435 if (!MAttributes.empty())
436 return Error("Multiple PARAMATTR blocks found!");
438 SmallVector<uint64_t, 64> Record;
440 SmallVector<AttributeWithIndex, 8> Attrs;
442 // Read all the records.
444 unsigned Code = Stream.ReadCode();
445 if (Code == bitc::END_BLOCK) {
446 if (Stream.ReadBlockEnd())
447 return Error("Error at end of PARAMATTR block");
451 if (Code == bitc::ENTER_SUBBLOCK) {
452 // No known subblocks, always skip them.
453 Stream.ReadSubBlockID();
454 if (Stream.SkipBlock())
455 return Error("Malformed block record");
459 if (Code == bitc::DEFINE_ABBREV) {
460 Stream.ReadAbbrevRecord();
466 switch (Stream.ReadRecord(Code, Record)) {
467 default: // Default behavior: ignore.
469 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
470 if (Record.size() & 1)
471 return Error("Invalid ENTRY record");
473 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
474 Attribute ReconstitutedAttr =
475 Attribute::decodeLLVMAttributesForBitcode(Context, Record[i+1]);
476 Record[i+1] = ReconstitutedAttr.Raw();
479 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
480 AttrBuilder B(Record[i+1]);
481 if (B.hasAttributes())
482 Attrs.push_back(AttributeWithIndex::get(Record[i],
483 Attribute::get(Context, B)));
486 MAttributes.push_back(AttributeSet::get(Context, Attrs));
494 bool BitcodeReader::ParseTypeTable() {
495 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
496 return Error("Malformed block record");
498 return ParseTypeTableBody();
501 bool BitcodeReader::ParseTypeTableBody() {
502 if (!TypeList.empty())
503 return Error("Multiple TYPE_BLOCKs found!");
505 SmallVector<uint64_t, 64> Record;
506 unsigned NumRecords = 0;
508 SmallString<64> TypeName;
510 // Read all the records for this type table.
512 unsigned Code = Stream.ReadCode();
513 if (Code == bitc::END_BLOCK) {
514 if (NumRecords != TypeList.size())
515 return Error("Invalid type forward reference in TYPE_BLOCK");
516 if (Stream.ReadBlockEnd())
517 return Error("Error at end of type table block");
521 if (Code == bitc::ENTER_SUBBLOCK) {
522 // No known subblocks, always skip them.
523 Stream.ReadSubBlockID();
524 if (Stream.SkipBlock())
525 return Error("Malformed block record");
529 if (Code == bitc::DEFINE_ABBREV) {
530 Stream.ReadAbbrevRecord();
537 switch (Stream.ReadRecord(Code, Record)) {
538 default: return Error("unknown type in type table");
539 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
540 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
541 // type list. This allows us to reserve space.
542 if (Record.size() < 1)
543 return Error("Invalid TYPE_CODE_NUMENTRY record");
544 TypeList.resize(Record[0]);
546 case bitc::TYPE_CODE_VOID: // VOID
547 ResultTy = Type::getVoidTy(Context);
549 case bitc::TYPE_CODE_HALF: // HALF
550 ResultTy = Type::getHalfTy(Context);
552 case bitc::TYPE_CODE_FLOAT: // FLOAT
553 ResultTy = Type::getFloatTy(Context);
555 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
556 ResultTy = Type::getDoubleTy(Context);
558 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
559 ResultTy = Type::getX86_FP80Ty(Context);
561 case bitc::TYPE_CODE_FP128: // FP128
562 ResultTy = Type::getFP128Ty(Context);
564 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
565 ResultTy = Type::getPPC_FP128Ty(Context);
567 case bitc::TYPE_CODE_LABEL: // LABEL
568 ResultTy = Type::getLabelTy(Context);
570 case bitc::TYPE_CODE_METADATA: // METADATA
571 ResultTy = Type::getMetadataTy(Context);
573 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
574 ResultTy = Type::getX86_MMXTy(Context);
576 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
577 if (Record.size() < 1)
578 return Error("Invalid Integer type record");
580 ResultTy = IntegerType::get(Context, Record[0]);
582 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
583 // [pointee type, address space]
584 if (Record.size() < 1)
585 return Error("Invalid POINTER type record");
586 unsigned AddressSpace = 0;
587 if (Record.size() == 2)
588 AddressSpace = Record[1];
589 ResultTy = getTypeByID(Record[0]);
590 if (ResultTy == 0) return Error("invalid element type in pointer type");
591 ResultTy = PointerType::get(ResultTy, AddressSpace);
594 case bitc::TYPE_CODE_FUNCTION_OLD: {
595 // FIXME: attrid is dead, remove it in LLVM 4.0
596 // FUNCTION: [vararg, attrid, retty, paramty x N]
597 if (Record.size() < 3)
598 return Error("Invalid FUNCTION type record");
599 SmallVector<Type*, 8> ArgTys;
600 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
601 if (Type *T = getTypeByID(Record[i]))
607 ResultTy = getTypeByID(Record[2]);
608 if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
609 return Error("invalid type in function type");
611 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
614 case bitc::TYPE_CODE_FUNCTION: {
615 // FUNCTION: [vararg, retty, paramty x N]
616 if (Record.size() < 2)
617 return Error("Invalid FUNCTION type record");
618 SmallVector<Type*, 8> ArgTys;
619 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
620 if (Type *T = getTypeByID(Record[i]))
626 ResultTy = getTypeByID(Record[1]);
627 if (ResultTy == 0 || ArgTys.size() < Record.size()-2)
628 return Error("invalid type in function type");
630 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
633 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
634 if (Record.size() < 1)
635 return Error("Invalid STRUCT type record");
636 SmallVector<Type*, 8> EltTys;
637 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
638 if (Type *T = getTypeByID(Record[i]))
643 if (EltTys.size() != Record.size()-1)
644 return Error("invalid type in struct type");
645 ResultTy = StructType::get(Context, EltTys, Record[0]);
648 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
649 if (ConvertToString(Record, 0, TypeName))
650 return Error("Invalid STRUCT_NAME record");
653 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
654 if (Record.size() < 1)
655 return Error("Invalid STRUCT type record");
657 if (NumRecords >= TypeList.size())
658 return Error("invalid TYPE table");
660 // Check to see if this was forward referenced, if so fill in the temp.
661 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
663 Res->setName(TypeName);
664 TypeList[NumRecords] = 0;
665 } else // Otherwise, create a new struct.
666 Res = StructType::create(Context, TypeName);
669 SmallVector<Type*, 8> EltTys;
670 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
671 if (Type *T = getTypeByID(Record[i]))
676 if (EltTys.size() != Record.size()-1)
677 return Error("invalid STRUCT type record");
678 Res->setBody(EltTys, Record[0]);
682 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
683 if (Record.size() != 1)
684 return Error("Invalid OPAQUE type record");
686 if (NumRecords >= TypeList.size())
687 return Error("invalid TYPE table");
689 // Check to see if this was forward referenced, if so fill in the temp.
690 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
692 Res->setName(TypeName);
693 TypeList[NumRecords] = 0;
694 } else // Otherwise, create a new struct with no body.
695 Res = StructType::create(Context, TypeName);
700 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
701 if (Record.size() < 2)
702 return Error("Invalid ARRAY type record");
703 if ((ResultTy = getTypeByID(Record[1])))
704 ResultTy = ArrayType::get(ResultTy, Record[0]);
706 return Error("Invalid ARRAY type element");
708 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
709 if (Record.size() < 2)
710 return Error("Invalid VECTOR type record");
711 if ((ResultTy = getTypeByID(Record[1])))
712 ResultTy = VectorType::get(ResultTy, Record[0]);
714 return Error("Invalid ARRAY type element");
718 if (NumRecords >= TypeList.size())
719 return Error("invalid TYPE table");
720 assert(ResultTy && "Didn't read a type?");
721 assert(TypeList[NumRecords] == 0 && "Already read type?");
722 TypeList[NumRecords++] = ResultTy;
726 bool BitcodeReader::ParseValueSymbolTable() {
727 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
728 return Error("Malformed block record");
730 SmallVector<uint64_t, 64> Record;
732 // Read all the records for this value table.
733 SmallString<128> ValueName;
735 unsigned Code = Stream.ReadCode();
736 if (Code == bitc::END_BLOCK) {
737 if (Stream.ReadBlockEnd())
738 return Error("Error at end of value symbol table block");
741 if (Code == bitc::ENTER_SUBBLOCK) {
742 // No known subblocks, always skip them.
743 Stream.ReadSubBlockID();
744 if (Stream.SkipBlock())
745 return Error("Malformed block record");
749 if (Code == bitc::DEFINE_ABBREV) {
750 Stream.ReadAbbrevRecord();
756 switch (Stream.ReadRecord(Code, Record)) {
757 default: // Default behavior: unknown type.
759 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
760 if (ConvertToString(Record, 1, ValueName))
761 return Error("Invalid VST_ENTRY record");
762 unsigned ValueID = Record[0];
763 if (ValueID >= ValueList.size())
764 return Error("Invalid Value ID in VST_ENTRY record");
765 Value *V = ValueList[ValueID];
767 V->setName(StringRef(ValueName.data(), ValueName.size()));
771 case bitc::VST_CODE_BBENTRY: {
772 if (ConvertToString(Record, 1, ValueName))
773 return Error("Invalid VST_BBENTRY record");
774 BasicBlock *BB = getBasicBlock(Record[0]);
776 return Error("Invalid BB ID in VST_BBENTRY record");
778 BB->setName(StringRef(ValueName.data(), ValueName.size()));
786 bool BitcodeReader::ParseMetadata() {
787 unsigned NextMDValueNo = MDValueList.size();
789 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
790 return Error("Malformed block record");
792 SmallVector<uint64_t, 64> Record;
794 // Read all the records.
796 unsigned Code = Stream.ReadCode();
797 if (Code == bitc::END_BLOCK) {
798 if (Stream.ReadBlockEnd())
799 return Error("Error at end of PARAMATTR block");
803 if (Code == bitc::ENTER_SUBBLOCK) {
804 // No known subblocks, always skip them.
805 Stream.ReadSubBlockID();
806 if (Stream.SkipBlock())
807 return Error("Malformed block record");
811 if (Code == bitc::DEFINE_ABBREV) {
812 Stream.ReadAbbrevRecord();
816 bool IsFunctionLocal = false;
819 Code = Stream.ReadRecord(Code, Record);
821 default: // Default behavior: ignore.
823 case bitc::METADATA_NAME: {
824 // Read named of the named metadata.
825 SmallString<8> Name(Record.begin(), Record.end());
827 Code = Stream.ReadCode();
829 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
830 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
831 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
833 // Read named metadata elements.
834 unsigned Size = Record.size();
835 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
836 for (unsigned i = 0; i != Size; ++i) {
837 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
839 return Error("Malformed metadata record");
844 case bitc::METADATA_FN_NODE:
845 IsFunctionLocal = true;
847 case bitc::METADATA_NODE: {
848 if (Record.size() % 2 == 1)
849 return Error("Invalid METADATA_NODE record");
851 unsigned Size = Record.size();
852 SmallVector<Value*, 8> Elts;
853 for (unsigned i = 0; i != Size; i += 2) {
854 Type *Ty = getTypeByID(Record[i]);
855 if (!Ty) return Error("Invalid METADATA_NODE record");
856 if (Ty->isMetadataTy())
857 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
858 else if (!Ty->isVoidTy())
859 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
861 Elts.push_back(NULL);
863 Value *V = MDNode::getWhenValsUnresolved(Context, Elts, IsFunctionLocal);
864 IsFunctionLocal = false;
865 MDValueList.AssignValue(V, NextMDValueNo++);
868 case bitc::METADATA_STRING: {
869 SmallString<8> String(Record.begin(), Record.end());
870 Value *V = MDString::get(Context, String);
871 MDValueList.AssignValue(V, NextMDValueNo++);
874 case bitc::METADATA_KIND: {
875 if (Record.size() < 2)
876 return Error("Invalid METADATA_KIND record");
878 unsigned Kind = Record[0];
879 SmallString<8> Name(Record.begin()+1, Record.end());
881 unsigned NewKind = TheModule->getMDKindID(Name.str());
882 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
883 return Error("Conflicting METADATA_KIND records");
890 /// decodeSignRotatedValue - Decode a signed value stored with the sign bit in
891 /// the LSB for dense VBR encoding.
892 uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
897 // There is no such thing as -0 with integers. "-0" really means MININT.
901 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
902 /// values and aliases that we can.
903 bool BitcodeReader::ResolveGlobalAndAliasInits() {
904 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
905 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
907 GlobalInitWorklist.swap(GlobalInits);
908 AliasInitWorklist.swap(AliasInits);
910 while (!GlobalInitWorklist.empty()) {
911 unsigned ValID = GlobalInitWorklist.back().second;
912 if (ValID >= ValueList.size()) {
913 // Not ready to resolve this yet, it requires something later in the file.
914 GlobalInits.push_back(GlobalInitWorklist.back());
916 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
917 GlobalInitWorklist.back().first->setInitializer(C);
919 return Error("Global variable initializer is not a constant!");
921 GlobalInitWorklist.pop_back();
924 while (!AliasInitWorklist.empty()) {
925 unsigned ValID = AliasInitWorklist.back().second;
926 if (ValID >= ValueList.size()) {
927 AliasInits.push_back(AliasInitWorklist.back());
929 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
930 AliasInitWorklist.back().first->setAliasee(C);
932 return Error("Alias initializer is not a constant!");
934 AliasInitWorklist.pop_back();
939 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
940 SmallVector<uint64_t, 8> Words(Vals.size());
941 std::transform(Vals.begin(), Vals.end(), Words.begin(),
942 BitcodeReader::decodeSignRotatedValue);
944 return APInt(TypeBits, Words);
947 bool BitcodeReader::ParseConstants() {
948 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
949 return Error("Malformed block record");
951 SmallVector<uint64_t, 64> Record;
953 // Read all the records for this value table.
954 Type *CurTy = Type::getInt32Ty(Context);
955 unsigned NextCstNo = ValueList.size();
957 unsigned Code = Stream.ReadCode();
958 if (Code == bitc::END_BLOCK)
961 if (Code == bitc::ENTER_SUBBLOCK) {
962 // No known subblocks, always skip them.
963 Stream.ReadSubBlockID();
964 if (Stream.SkipBlock())
965 return Error("Malformed block record");
969 if (Code == bitc::DEFINE_ABBREV) {
970 Stream.ReadAbbrevRecord();
977 unsigned BitCode = Stream.ReadRecord(Code, Record);
979 default: // Default behavior: unknown constant
980 case bitc::CST_CODE_UNDEF: // UNDEF
981 V = UndefValue::get(CurTy);
983 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
985 return Error("Malformed CST_SETTYPE record");
986 if (Record[0] >= TypeList.size())
987 return Error("Invalid Type ID in CST_SETTYPE record");
988 CurTy = TypeList[Record[0]];
989 continue; // Skip the ValueList manipulation.
990 case bitc::CST_CODE_NULL: // NULL
991 V = Constant::getNullValue(CurTy);
993 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
994 if (!CurTy->isIntegerTy() || Record.empty())
995 return Error("Invalid CST_INTEGER record");
996 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
998 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
999 if (!CurTy->isIntegerTy() || Record.empty())
1000 return Error("Invalid WIDE_INTEGER record");
1002 APInt VInt = ReadWideAPInt(Record,
1003 cast<IntegerType>(CurTy)->getBitWidth());
1004 V = ConstantInt::get(Context, VInt);
1008 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1010 return Error("Invalid FLOAT record");
1011 if (CurTy->isHalfTy())
1012 V = ConstantFP::get(Context, APFloat(APInt(16, (uint16_t)Record[0])));
1013 else if (CurTy->isFloatTy())
1014 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1015 else if (CurTy->isDoubleTy())
1016 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1017 else if (CurTy->isX86_FP80Ty()) {
1018 // Bits are not stored the same way as a normal i80 APInt, compensate.
1019 uint64_t Rearrange[2];
1020 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1021 Rearrange[1] = Record[0] >> 48;
1022 V = ConstantFP::get(Context, APFloat(APInt(80, Rearrange)));
1023 } else if (CurTy->isFP128Ty())
1024 V = ConstantFP::get(Context, APFloat(APInt(128, Record), true));
1025 else if (CurTy->isPPC_FP128Ty())
1026 V = ConstantFP::get(Context, APFloat(APInt(128, Record)));
1028 V = UndefValue::get(CurTy);
1032 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1034 return Error("Invalid CST_AGGREGATE record");
1036 unsigned Size = Record.size();
1037 SmallVector<Constant*, 16> Elts;
1039 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1040 for (unsigned i = 0; i != Size; ++i)
1041 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1042 STy->getElementType(i)));
1043 V = ConstantStruct::get(STy, Elts);
1044 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1045 Type *EltTy = ATy->getElementType();
1046 for (unsigned i = 0; i != Size; ++i)
1047 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1048 V = ConstantArray::get(ATy, Elts);
1049 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1050 Type *EltTy = VTy->getElementType();
1051 for (unsigned i = 0; i != Size; ++i)
1052 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1053 V = ConstantVector::get(Elts);
1055 V = UndefValue::get(CurTy);
1059 case bitc::CST_CODE_STRING: // STRING: [values]
1060 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1062 return Error("Invalid CST_STRING record");
1064 SmallString<16> Elts(Record.begin(), Record.end());
1065 V = ConstantDataArray::getString(Context, Elts,
1066 BitCode == bitc::CST_CODE_CSTRING);
1069 case bitc::CST_CODE_DATA: {// DATA: [n x value]
1071 return Error("Invalid CST_DATA record");
1073 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
1074 unsigned Size = Record.size();
1076 if (EltTy->isIntegerTy(8)) {
1077 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
1078 if (isa<VectorType>(CurTy))
1079 V = ConstantDataVector::get(Context, Elts);
1081 V = ConstantDataArray::get(Context, Elts);
1082 } else if (EltTy->isIntegerTy(16)) {
1083 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
1084 if (isa<VectorType>(CurTy))
1085 V = ConstantDataVector::get(Context, Elts);
1087 V = ConstantDataArray::get(Context, Elts);
1088 } else if (EltTy->isIntegerTy(32)) {
1089 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
1090 if (isa<VectorType>(CurTy))
1091 V = ConstantDataVector::get(Context, Elts);
1093 V = ConstantDataArray::get(Context, Elts);
1094 } else if (EltTy->isIntegerTy(64)) {
1095 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
1096 if (isa<VectorType>(CurTy))
1097 V = ConstantDataVector::get(Context, Elts);
1099 V = ConstantDataArray::get(Context, Elts);
1100 } else if (EltTy->isFloatTy()) {
1101 SmallVector<float, 16> Elts(Size);
1102 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
1103 if (isa<VectorType>(CurTy))
1104 V = ConstantDataVector::get(Context, Elts);
1106 V = ConstantDataArray::get(Context, Elts);
1107 } else if (EltTy->isDoubleTy()) {
1108 SmallVector<double, 16> Elts(Size);
1109 std::transform(Record.begin(), Record.end(), Elts.begin(),
1111 if (isa<VectorType>(CurTy))
1112 V = ConstantDataVector::get(Context, Elts);
1114 V = ConstantDataArray::get(Context, Elts);
1116 return Error("Unknown element type in CE_DATA");
1121 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1122 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1123 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1125 V = UndefValue::get(CurTy); // Unknown binop.
1127 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1128 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1130 if (Record.size() >= 4) {
1131 if (Opc == Instruction::Add ||
1132 Opc == Instruction::Sub ||
1133 Opc == Instruction::Mul ||
1134 Opc == Instruction::Shl) {
1135 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1136 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1137 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1138 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1139 } else if (Opc == Instruction::SDiv ||
1140 Opc == Instruction::UDiv ||
1141 Opc == Instruction::LShr ||
1142 Opc == Instruction::AShr) {
1143 if (Record[3] & (1 << bitc::PEO_EXACT))
1144 Flags |= SDivOperator::IsExact;
1147 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1151 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1152 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1153 int Opc = GetDecodedCastOpcode(Record[0]);
1155 V = UndefValue::get(CurTy); // Unknown cast.
1157 Type *OpTy = getTypeByID(Record[1]);
1158 if (!OpTy) return Error("Invalid CE_CAST record");
1159 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1160 V = ConstantExpr::getCast(Opc, Op, CurTy);
1164 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1165 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1166 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1167 SmallVector<Constant*, 16> Elts;
1168 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1169 Type *ElTy = getTypeByID(Record[i]);
1170 if (!ElTy) return Error("Invalid CE_GEP record");
1171 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1173 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1174 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1176 bitc::CST_CODE_CE_INBOUNDS_GEP);
1179 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1180 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1181 V = ConstantExpr::getSelect(
1182 ValueList.getConstantFwdRef(Record[0],
1183 Type::getInt1Ty(Context)),
1184 ValueList.getConstantFwdRef(Record[1],CurTy),
1185 ValueList.getConstantFwdRef(Record[2],CurTy));
1187 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1188 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1190 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1191 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1192 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1193 Constant *Op1 = ValueList.getConstantFwdRef(Record[2],
1194 Type::getInt32Ty(Context));
1195 V = ConstantExpr::getExtractElement(Op0, Op1);
1198 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1199 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1200 if (Record.size() < 3 || OpTy == 0)
1201 return Error("Invalid CE_INSERTELT record");
1202 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1203 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1204 OpTy->getElementType());
1205 Constant *Op2 = ValueList.getConstantFwdRef(Record[2],
1206 Type::getInt32Ty(Context));
1207 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1210 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1211 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1212 if (Record.size() < 3 || OpTy == 0)
1213 return Error("Invalid CE_SHUFFLEVEC record");
1214 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1215 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1216 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1217 OpTy->getNumElements());
1218 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1219 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1222 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1223 VectorType *RTy = dyn_cast<VectorType>(CurTy);
1225 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1226 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1227 return Error("Invalid CE_SHUFVEC_EX record");
1228 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1229 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1230 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1231 RTy->getNumElements());
1232 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1233 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1236 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1237 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1238 Type *OpTy = getTypeByID(Record[0]);
1239 if (OpTy == 0) return Error("Invalid CE_CMP record");
1240 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1241 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1243 if (OpTy->isFPOrFPVectorTy())
1244 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1246 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1249 // This maintains backward compatibility, pre-asm dialect keywords.
1250 // FIXME: Remove with the 4.0 release.
1251 case bitc::CST_CODE_INLINEASM_OLD: {
1252 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1253 std::string AsmStr, ConstrStr;
1254 bool HasSideEffects = Record[0] & 1;
1255 bool IsAlignStack = Record[0] >> 1;
1256 unsigned AsmStrSize = Record[1];
1257 if (2+AsmStrSize >= Record.size())
1258 return Error("Invalid INLINEASM record");
1259 unsigned ConstStrSize = Record[2+AsmStrSize];
1260 if (3+AsmStrSize+ConstStrSize > Record.size())
1261 return Error("Invalid INLINEASM record");
1263 for (unsigned i = 0; i != AsmStrSize; ++i)
1264 AsmStr += (char)Record[2+i];
1265 for (unsigned i = 0; i != ConstStrSize; ++i)
1266 ConstrStr += (char)Record[3+AsmStrSize+i];
1267 PointerType *PTy = cast<PointerType>(CurTy);
1268 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1269 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1272 // This version adds support for the asm dialect keywords (e.g.,
1274 case bitc::CST_CODE_INLINEASM: {
1275 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1276 std::string AsmStr, ConstrStr;
1277 bool HasSideEffects = Record[0] & 1;
1278 bool IsAlignStack = (Record[0] >> 1) & 1;
1279 unsigned AsmDialect = Record[0] >> 2;
1280 unsigned AsmStrSize = Record[1];
1281 if (2+AsmStrSize >= Record.size())
1282 return Error("Invalid INLINEASM record");
1283 unsigned ConstStrSize = Record[2+AsmStrSize];
1284 if (3+AsmStrSize+ConstStrSize > Record.size())
1285 return Error("Invalid INLINEASM record");
1287 for (unsigned i = 0; i != AsmStrSize; ++i)
1288 AsmStr += (char)Record[2+i];
1289 for (unsigned i = 0; i != ConstStrSize; ++i)
1290 ConstrStr += (char)Record[3+AsmStrSize+i];
1291 PointerType *PTy = cast<PointerType>(CurTy);
1292 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1293 AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
1294 InlineAsm::AsmDialect(AsmDialect));
1297 case bitc::CST_CODE_BLOCKADDRESS:{
1298 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1299 Type *FnTy = getTypeByID(Record[0]);
1300 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1302 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1303 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1305 // If the function is already parsed we can insert the block address right
1308 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
1309 for (size_t I = 0, E = Record[2]; I != E; ++I) {
1311 return Error("Invalid blockaddress block #");
1314 V = BlockAddress::get(Fn, BBI);
1316 // Otherwise insert a placeholder and remember it so it can be inserted
1317 // when the function is parsed.
1318 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1319 Type::getInt8Ty(Context),
1320 false, GlobalValue::InternalLinkage,
1322 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1329 ValueList.AssignValue(V, NextCstNo);
1333 if (NextCstNo != ValueList.size())
1334 return Error("Invalid constant reference!");
1336 if (Stream.ReadBlockEnd())
1337 return Error("Error at end of constants block");
1339 // Once all the constants have been read, go through and resolve forward
1341 ValueList.ResolveConstantForwardRefs();
1345 bool BitcodeReader::ParseUseLists() {
1346 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
1347 return Error("Malformed block record");
1349 SmallVector<uint64_t, 64> Record;
1351 // Read all the records.
1353 unsigned Code = Stream.ReadCode();
1354 if (Code == bitc::END_BLOCK) {
1355 if (Stream.ReadBlockEnd())
1356 return Error("Error at end of use-list table block");
1360 if (Code == bitc::ENTER_SUBBLOCK) {
1361 // No known subblocks, always skip them.
1362 Stream.ReadSubBlockID();
1363 if (Stream.SkipBlock())
1364 return Error("Malformed block record");
1368 if (Code == bitc::DEFINE_ABBREV) {
1369 Stream.ReadAbbrevRecord();
1373 // Read a use list record.
1375 switch (Stream.ReadRecord(Code, Record)) {
1376 default: // Default behavior: unknown type.
1378 case bitc::USELIST_CODE_ENTRY: { // USELIST_CODE_ENTRY: TBD.
1379 unsigned RecordLength = Record.size();
1380 if (RecordLength < 1)
1381 return Error ("Invalid UseList reader!");
1382 UseListRecords.push_back(Record);
1389 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1390 /// remember where it is and then skip it. This lets us lazily deserialize the
1392 bool BitcodeReader::RememberAndSkipFunctionBody() {
1393 // Get the function we are talking about.
1394 if (FunctionsWithBodies.empty())
1395 return Error("Insufficient function protos");
1397 Function *Fn = FunctionsWithBodies.back();
1398 FunctionsWithBodies.pop_back();
1400 // Save the current stream state.
1401 uint64_t CurBit = Stream.GetCurrentBitNo();
1402 DeferredFunctionInfo[Fn] = CurBit;
1404 // Skip over the function block for now.
1405 if (Stream.SkipBlock())
1406 return Error("Malformed block record");
1410 bool BitcodeReader::GlobalCleanup() {
1411 // Patch the initializers for globals and aliases up.
1412 ResolveGlobalAndAliasInits();
1413 if (!GlobalInits.empty() || !AliasInits.empty())
1414 return Error("Malformed global initializer set");
1416 // Look for intrinsic functions which need to be upgraded at some point
1417 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1420 if (UpgradeIntrinsicFunction(FI, NewFn))
1421 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1424 // Look for global variables which need to be renamed.
1425 for (Module::global_iterator
1426 GI = TheModule->global_begin(), GE = TheModule->global_end();
1428 UpgradeGlobalVariable(GI);
1429 // Force deallocation of memory for these vectors to favor the client that
1430 // want lazy deserialization.
1431 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1432 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1436 bool BitcodeReader::ParseModule(bool Resume) {
1438 Stream.JumpToBit(NextUnreadBit);
1439 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1440 return Error("Malformed block record");
1442 SmallVector<uint64_t, 64> Record;
1443 std::vector<std::string> SectionTable;
1444 std::vector<std::string> GCTable;
1446 // Read all the records for this module.
1447 while (!Stream.AtEndOfStream()) {
1448 unsigned Code = Stream.ReadCode();
1449 if (Code == bitc::END_BLOCK) {
1450 if (Stream.ReadBlockEnd())
1451 return Error("Error at end of module block");
1453 return GlobalCleanup();
1456 if (Code == bitc::ENTER_SUBBLOCK) {
1457 switch (Stream.ReadSubBlockID()) {
1458 default: // Skip unknown content.
1459 if (Stream.SkipBlock())
1460 return Error("Malformed block record");
1462 case bitc::BLOCKINFO_BLOCK_ID:
1463 if (Stream.ReadBlockInfoBlock())
1464 return Error("Malformed BlockInfoBlock");
1466 case bitc::PARAMATTR_BLOCK_ID:
1467 if (ParseAttributeBlock())
1470 case bitc::TYPE_BLOCK_ID_NEW:
1471 if (ParseTypeTable())
1474 case bitc::VALUE_SYMTAB_BLOCK_ID:
1475 if (ParseValueSymbolTable())
1477 SeenValueSymbolTable = true;
1479 case bitc::CONSTANTS_BLOCK_ID:
1480 if (ParseConstants() || ResolveGlobalAndAliasInits())
1483 case bitc::METADATA_BLOCK_ID:
1484 if (ParseMetadata())
1487 case bitc::FUNCTION_BLOCK_ID:
1488 // If this is the first function body we've seen, reverse the
1489 // FunctionsWithBodies list.
1490 if (!SeenFirstFunctionBody) {
1491 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1492 if (GlobalCleanup())
1494 SeenFirstFunctionBody = true;
1497 if (RememberAndSkipFunctionBody())
1499 // For streaming bitcode, suspend parsing when we reach the function
1500 // bodies. Subsequent materialization calls will resume it when
1501 // necessary. For streaming, the function bodies must be at the end of
1502 // the bitcode. If the bitcode file is old, the symbol table will be
1503 // at the end instead and will not have been seen yet. In this case,
1504 // just finish the parse now.
1505 if (LazyStreamer && SeenValueSymbolTable) {
1506 NextUnreadBit = Stream.GetCurrentBitNo();
1510 case bitc::USELIST_BLOCK_ID:
1511 if (ParseUseLists())
1518 if (Code == bitc::DEFINE_ABBREV) {
1519 Stream.ReadAbbrevRecord();
1524 switch (Stream.ReadRecord(Code, Record)) {
1525 default: break; // Default behavior, ignore unknown content.
1526 case bitc::MODULE_CODE_VERSION: { // VERSION: [version#]
1527 if (Record.size() < 1)
1528 return Error("Malformed MODULE_CODE_VERSION");
1529 // Only version #0 and #1 are supported so far.
1530 unsigned module_version = Record[0];
1531 switch (module_version) {
1532 default: return Error("Unknown bitstream version!");
1534 UseRelativeIDs = false;
1537 UseRelativeIDs = true;
1542 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1544 if (ConvertToString(Record, 0, S))
1545 return Error("Invalid MODULE_CODE_TRIPLE record");
1546 TheModule->setTargetTriple(S);
1549 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1551 if (ConvertToString(Record, 0, S))
1552 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1553 TheModule->setDataLayout(S);
1556 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1558 if (ConvertToString(Record, 0, S))
1559 return Error("Invalid MODULE_CODE_ASM record");
1560 TheModule->setModuleInlineAsm(S);
1563 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1564 // FIXME: Remove in 4.0.
1566 if (ConvertToString(Record, 0, S))
1567 return Error("Invalid MODULE_CODE_DEPLIB record");
1571 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1573 if (ConvertToString(Record, 0, S))
1574 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1575 SectionTable.push_back(S);
1578 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1580 if (ConvertToString(Record, 0, S))
1581 return Error("Invalid MODULE_CODE_GCNAME record");
1582 GCTable.push_back(S);
1585 // GLOBALVAR: [pointer type, isconst, initid,
1586 // linkage, alignment, section, visibility, threadlocal,
1588 case bitc::MODULE_CODE_GLOBALVAR: {
1589 if (Record.size() < 6)
1590 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1591 Type *Ty = getTypeByID(Record[0]);
1592 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1593 if (!Ty->isPointerTy())
1594 return Error("Global not a pointer type!");
1595 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1596 Ty = cast<PointerType>(Ty)->getElementType();
1598 bool isConstant = Record[1];
1599 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1600 unsigned Alignment = (1 << Record[4]) >> 1;
1601 std::string Section;
1603 if (Record[5]-1 >= SectionTable.size())
1604 return Error("Invalid section ID");
1605 Section = SectionTable[Record[5]-1];
1607 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1608 if (Record.size() > 6)
1609 Visibility = GetDecodedVisibility(Record[6]);
1611 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
1612 if (Record.size() > 7)
1613 TLM = GetDecodedThreadLocalMode(Record[7]);
1615 bool UnnamedAddr = false;
1616 if (Record.size() > 8)
1617 UnnamedAddr = Record[8];
1619 GlobalVariable *NewGV =
1620 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1622 NewGV->setAlignment(Alignment);
1623 if (!Section.empty())
1624 NewGV->setSection(Section);
1625 NewGV->setVisibility(Visibility);
1626 NewGV->setUnnamedAddr(UnnamedAddr);
1628 ValueList.push_back(NewGV);
1630 // Remember which value to use for the global initializer.
1631 if (unsigned InitID = Record[2])
1632 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1635 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1636 // alignment, section, visibility, gc, unnamed_addr]
1637 case bitc::MODULE_CODE_FUNCTION: {
1638 if (Record.size() < 8)
1639 return Error("Invalid MODULE_CODE_FUNCTION record");
1640 Type *Ty = getTypeByID(Record[0]);
1641 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1642 if (!Ty->isPointerTy())
1643 return Error("Function not a pointer type!");
1645 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1647 return Error("Function not a pointer to function type!");
1649 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1652 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1653 bool isProto = Record[2];
1654 Func->setLinkage(GetDecodedLinkage(Record[3]));
1655 Func->setAttributes(getAttributes(Record[4]));
1657 Func->setAlignment((1 << Record[5]) >> 1);
1659 if (Record[6]-1 >= SectionTable.size())
1660 return Error("Invalid section ID");
1661 Func->setSection(SectionTable[Record[6]-1]);
1663 Func->setVisibility(GetDecodedVisibility(Record[7]));
1664 if (Record.size() > 8 && Record[8]) {
1665 if (Record[8]-1 > GCTable.size())
1666 return Error("Invalid GC ID");
1667 Func->setGC(GCTable[Record[8]-1].c_str());
1669 bool UnnamedAddr = false;
1670 if (Record.size() > 9)
1671 UnnamedAddr = Record[9];
1672 Func->setUnnamedAddr(UnnamedAddr);
1673 ValueList.push_back(Func);
1675 // If this is a function with a body, remember the prototype we are
1676 // creating now, so that we can match up the body with them later.
1678 FunctionsWithBodies.push_back(Func);
1679 if (LazyStreamer) DeferredFunctionInfo[Func] = 0;
1683 // ALIAS: [alias type, aliasee val#, linkage]
1684 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1685 case bitc::MODULE_CODE_ALIAS: {
1686 if (Record.size() < 3)
1687 return Error("Invalid MODULE_ALIAS record");
1688 Type *Ty = getTypeByID(Record[0]);
1689 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1690 if (!Ty->isPointerTy())
1691 return Error("Function not a pointer type!");
1693 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1695 // Old bitcode files didn't have visibility field.
1696 if (Record.size() > 3)
1697 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1698 ValueList.push_back(NewGA);
1699 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1702 /// MODULE_CODE_PURGEVALS: [numvals]
1703 case bitc::MODULE_CODE_PURGEVALS:
1704 // Trim down the value list to the specified size.
1705 if (Record.size() < 1 || Record[0] > ValueList.size())
1706 return Error("Invalid MODULE_PURGEVALS record");
1707 ValueList.shrinkTo(Record[0]);
1713 return Error("Premature end of bitstream");
1716 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1719 if (InitStream()) return true;
1721 // Sniff for the signature.
1722 if (Stream.Read(8) != 'B' ||
1723 Stream.Read(8) != 'C' ||
1724 Stream.Read(4) != 0x0 ||
1725 Stream.Read(4) != 0xC ||
1726 Stream.Read(4) != 0xE ||
1727 Stream.Read(4) != 0xD)
1728 return Error("Invalid bitcode signature");
1730 // We expect a number of well-defined blocks, though we don't necessarily
1731 // need to understand them all.
1732 while (!Stream.AtEndOfStream()) {
1733 unsigned Code = Stream.ReadCode();
1735 if (Code != bitc::ENTER_SUBBLOCK) {
1737 // The ranlib in xcode 4 will align archive members by appending newlines
1738 // to the end of them. If this file size is a multiple of 4 but not 8, we
1739 // have to read and ignore these final 4 bytes :-(
1740 if (Stream.getAbbrevIDWidth() == 2 && Code == 2 &&
1741 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1742 Stream.AtEndOfStream())
1745 return Error("Invalid record at top-level");
1748 unsigned BlockID = Stream.ReadSubBlockID();
1750 // We only know the MODULE subblock ID.
1752 case bitc::BLOCKINFO_BLOCK_ID:
1753 if (Stream.ReadBlockInfoBlock())
1754 return Error("Malformed BlockInfoBlock");
1756 case bitc::MODULE_BLOCK_ID:
1757 // Reject multiple MODULE_BLOCK's in a single bitstream.
1759 return Error("Multiple MODULE_BLOCKs in same stream");
1761 if (ParseModule(false))
1763 if (LazyStreamer) return false;
1766 if (Stream.SkipBlock())
1767 return Error("Malformed block record");
1775 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1776 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1777 return Error("Malformed block record");
1779 SmallVector<uint64_t, 64> Record;
1781 // Read all the records for this module.
1782 while (!Stream.AtEndOfStream()) {
1783 unsigned Code = Stream.ReadCode();
1784 if (Code == bitc::END_BLOCK) {
1785 if (Stream.ReadBlockEnd())
1786 return Error("Error at end of module block");
1791 if (Code == bitc::ENTER_SUBBLOCK) {
1792 switch (Stream.ReadSubBlockID()) {
1793 default: // Skip unknown content.
1794 if (Stream.SkipBlock())
1795 return Error("Malformed block record");
1801 if (Code == bitc::DEFINE_ABBREV) {
1802 Stream.ReadAbbrevRecord();
1807 switch (Stream.ReadRecord(Code, Record)) {
1808 default: break; // Default behavior, ignore unknown content.
1809 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1811 if (ConvertToString(Record, 0, S))
1812 return Error("Invalid MODULE_CODE_TRIPLE record");
1820 return Error("Premature end of bitstream");
1823 bool BitcodeReader::ParseTriple(std::string &Triple) {
1824 if (InitStream()) return true;
1826 // Sniff for the signature.
1827 if (Stream.Read(8) != 'B' ||
1828 Stream.Read(8) != 'C' ||
1829 Stream.Read(4) != 0x0 ||
1830 Stream.Read(4) != 0xC ||
1831 Stream.Read(4) != 0xE ||
1832 Stream.Read(4) != 0xD)
1833 return Error("Invalid bitcode signature");
1835 // We expect a number of well-defined blocks, though we don't necessarily
1836 // need to understand them all.
1837 while (!Stream.AtEndOfStream()) {
1838 unsigned Code = Stream.ReadCode();
1840 if (Code != bitc::ENTER_SUBBLOCK)
1841 return Error("Invalid record at top-level");
1843 unsigned BlockID = Stream.ReadSubBlockID();
1845 // We only know the MODULE subblock ID.
1847 case bitc::MODULE_BLOCK_ID:
1848 if (ParseModuleTriple(Triple))
1852 if (Stream.SkipBlock())
1853 return Error("Malformed block record");
1861 /// ParseMetadataAttachment - Parse metadata attachments.
1862 bool BitcodeReader::ParseMetadataAttachment() {
1863 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1864 return Error("Malformed block record");
1866 SmallVector<uint64_t, 64> Record;
1868 unsigned Code = Stream.ReadCode();
1869 if (Code == bitc::END_BLOCK) {
1870 if (Stream.ReadBlockEnd())
1871 return Error("Error at end of PARAMATTR block");
1874 if (Code == bitc::DEFINE_ABBREV) {
1875 Stream.ReadAbbrevRecord();
1878 // Read a metadata attachment record.
1880 switch (Stream.ReadRecord(Code, Record)) {
1881 default: // Default behavior: ignore.
1883 case bitc::METADATA_ATTACHMENT: {
1884 unsigned RecordLength = Record.size();
1885 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1886 return Error ("Invalid METADATA_ATTACHMENT reader!");
1887 Instruction *Inst = InstructionList[Record[0]];
1888 for (unsigned i = 1; i != RecordLength; i = i+2) {
1889 unsigned Kind = Record[i];
1890 DenseMap<unsigned, unsigned>::iterator I =
1891 MDKindMap.find(Kind);
1892 if (I == MDKindMap.end())
1893 return Error("Invalid metadata kind ID");
1894 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1895 Inst->setMetadata(I->second, cast<MDNode>(Node));
1904 /// ParseFunctionBody - Lazily parse the specified function body block.
1905 bool BitcodeReader::ParseFunctionBody(Function *F) {
1906 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1907 return Error("Malformed block record");
1909 InstructionList.clear();
1910 unsigned ModuleValueListSize = ValueList.size();
1911 unsigned ModuleMDValueListSize = MDValueList.size();
1913 // Add all the function arguments to the value table.
1914 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1915 ValueList.push_back(I);
1917 unsigned NextValueNo = ValueList.size();
1918 BasicBlock *CurBB = 0;
1919 unsigned CurBBNo = 0;
1923 // Read all the records.
1924 SmallVector<uint64_t, 64> Record;
1926 unsigned Code = Stream.ReadCode();
1927 if (Code == bitc::END_BLOCK) {
1928 if (Stream.ReadBlockEnd())
1929 return Error("Error at end of function block");
1933 if (Code == bitc::ENTER_SUBBLOCK) {
1934 switch (Stream.ReadSubBlockID()) {
1935 default: // Skip unknown content.
1936 if (Stream.SkipBlock())
1937 return Error("Malformed block record");
1939 case bitc::CONSTANTS_BLOCK_ID:
1940 if (ParseConstants()) return true;
1941 NextValueNo = ValueList.size();
1943 case bitc::VALUE_SYMTAB_BLOCK_ID:
1944 if (ParseValueSymbolTable()) return true;
1946 case bitc::METADATA_ATTACHMENT_ID:
1947 if (ParseMetadataAttachment()) return true;
1949 case bitc::METADATA_BLOCK_ID:
1950 if (ParseMetadata()) return true;
1956 if (Code == bitc::DEFINE_ABBREV) {
1957 Stream.ReadAbbrevRecord();
1964 unsigned BitCode = Stream.ReadRecord(Code, Record);
1966 default: // Default behavior: reject
1967 return Error("Unknown instruction");
1968 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1969 if (Record.size() < 1 || Record[0] == 0)
1970 return Error("Invalid DECLAREBLOCKS record");
1971 // Create all the basic blocks for the function.
1972 FunctionBBs.resize(Record[0]);
1973 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1974 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1975 CurBB = FunctionBBs[0];
1978 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1979 // This record indicates that the last instruction is at the same
1980 // location as the previous instruction with a location.
1983 // Get the last instruction emitted.
1984 if (CurBB && !CurBB->empty())
1986 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1987 !FunctionBBs[CurBBNo-1]->empty())
1988 I = &FunctionBBs[CurBBNo-1]->back();
1990 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1991 I->setDebugLoc(LastLoc);
1995 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
1996 I = 0; // Get the last instruction emitted.
1997 if (CurBB && !CurBB->empty())
1999 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
2000 !FunctionBBs[CurBBNo-1]->empty())
2001 I = &FunctionBBs[CurBBNo-1]->back();
2002 if (I == 0 || Record.size() < 4)
2003 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
2005 unsigned Line = Record[0], Col = Record[1];
2006 unsigned ScopeID = Record[2], IAID = Record[3];
2008 MDNode *Scope = 0, *IA = 0;
2009 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
2010 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
2011 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
2012 I->setDebugLoc(LastLoc);
2017 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
2020 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2021 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
2022 OpNum+1 > Record.size())
2023 return Error("Invalid BINOP record");
2025 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
2026 if (Opc == -1) return Error("Invalid BINOP record");
2027 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
2028 InstructionList.push_back(I);
2029 if (OpNum < Record.size()) {
2030 if (Opc == Instruction::Add ||
2031 Opc == Instruction::Sub ||
2032 Opc == Instruction::Mul ||
2033 Opc == Instruction::Shl) {
2034 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2035 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
2036 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2037 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
2038 } else if (Opc == Instruction::SDiv ||
2039 Opc == Instruction::UDiv ||
2040 Opc == Instruction::LShr ||
2041 Opc == Instruction::AShr) {
2042 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
2043 cast<BinaryOperator>(I)->setIsExact(true);
2044 } else if (isa<FPMathOperator>(I)) {
2046 if (0 != (Record[OpNum] & FastMathFlags::UnsafeAlgebra))
2047 FMF.setUnsafeAlgebra();
2048 if (0 != (Record[OpNum] & FastMathFlags::NoNaNs))
2050 if (0 != (Record[OpNum] & FastMathFlags::NoInfs))
2052 if (0 != (Record[OpNum] & FastMathFlags::NoSignedZeros))
2053 FMF.setNoSignedZeros();
2054 if (0 != (Record[OpNum] & FastMathFlags::AllowReciprocal))
2055 FMF.setAllowReciprocal();
2057 I->setFastMathFlags(FMF);
2063 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
2066 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2067 OpNum+2 != Record.size())
2068 return Error("Invalid CAST record");
2070 Type *ResTy = getTypeByID(Record[OpNum]);
2071 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
2072 if (Opc == -1 || ResTy == 0)
2073 return Error("Invalid CAST record");
2074 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
2075 InstructionList.push_back(I);
2078 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
2079 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
2082 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
2083 return Error("Invalid GEP record");
2085 SmallVector<Value*, 16> GEPIdx;
2086 while (OpNum != Record.size()) {
2088 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2089 return Error("Invalid GEP record");
2090 GEPIdx.push_back(Op);
2093 I = GetElementPtrInst::Create(BasePtr, GEPIdx);
2094 InstructionList.push_back(I);
2095 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
2096 cast<GetElementPtrInst>(I)->setIsInBounds(true);
2100 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
2101 // EXTRACTVAL: [opty, opval, n x indices]
2104 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2105 return Error("Invalid EXTRACTVAL record");
2107 SmallVector<unsigned, 4> EXTRACTVALIdx;
2108 for (unsigned RecSize = Record.size();
2109 OpNum != RecSize; ++OpNum) {
2110 uint64_t Index = Record[OpNum];
2111 if ((unsigned)Index != Index)
2112 return Error("Invalid EXTRACTVAL index");
2113 EXTRACTVALIdx.push_back((unsigned)Index);
2116 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
2117 InstructionList.push_back(I);
2121 case bitc::FUNC_CODE_INST_INSERTVAL: {
2122 // INSERTVAL: [opty, opval, opty, opval, n x indices]
2125 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2126 return Error("Invalid INSERTVAL record");
2128 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
2129 return Error("Invalid INSERTVAL record");
2131 SmallVector<unsigned, 4> INSERTVALIdx;
2132 for (unsigned RecSize = Record.size();
2133 OpNum != RecSize; ++OpNum) {
2134 uint64_t Index = Record[OpNum];
2135 if ((unsigned)Index != Index)
2136 return Error("Invalid INSERTVAL index");
2137 INSERTVALIdx.push_back((unsigned)Index);
2140 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
2141 InstructionList.push_back(I);
2145 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2146 // obsolete form of select
2147 // handles select i1 ... in old bitcode
2149 Value *TrueVal, *FalseVal, *Cond;
2150 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2151 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
2152 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
2153 return Error("Invalid SELECT record");
2155 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2156 InstructionList.push_back(I);
2160 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2161 // new form of select
2162 // handles select i1 or select [N x i1]
2164 Value *TrueVal, *FalseVal, *Cond;
2165 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2166 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
2167 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2168 return Error("Invalid SELECT record");
2170 // select condition can be either i1 or [N x i1]
2171 if (VectorType* vector_type =
2172 dyn_cast<VectorType>(Cond->getType())) {
2174 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2175 return Error("Invalid SELECT condition type");
2178 if (Cond->getType() != Type::getInt1Ty(Context))
2179 return Error("Invalid SELECT condition type");
2182 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2183 InstructionList.push_back(I);
2187 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2190 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2191 popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
2192 return Error("Invalid EXTRACTELT record");
2193 I = ExtractElementInst::Create(Vec, Idx);
2194 InstructionList.push_back(I);
2198 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2200 Value *Vec, *Elt, *Idx;
2201 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2202 popValue(Record, OpNum, NextValueNo,
2203 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2204 popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
2205 return Error("Invalid INSERTELT record");
2206 I = InsertElementInst::Create(Vec, Elt, Idx);
2207 InstructionList.push_back(I);
2211 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2213 Value *Vec1, *Vec2, *Mask;
2214 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2215 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
2216 return Error("Invalid SHUFFLEVEC record");
2218 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2219 return Error("Invalid SHUFFLEVEC record");
2220 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2221 InstructionList.push_back(I);
2225 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2226 // Old form of ICmp/FCmp returning bool
2227 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2228 // both legal on vectors but had different behaviour.
2229 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2230 // FCmp/ICmp returning bool or vector of bool
2234 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2235 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
2236 OpNum+1 != Record.size())
2237 return Error("Invalid CMP record");
2239 if (LHS->getType()->isFPOrFPVectorTy())
2240 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2242 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2243 InstructionList.push_back(I);
2247 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2249 unsigned Size = Record.size();
2251 I = ReturnInst::Create(Context);
2252 InstructionList.push_back(I);
2258 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2259 return Error("Invalid RET record");
2260 if (OpNum != Record.size())
2261 return Error("Invalid RET record");
2263 I = ReturnInst::Create(Context, Op);
2264 InstructionList.push_back(I);
2267 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2268 if (Record.size() != 1 && Record.size() != 3)
2269 return Error("Invalid BR record");
2270 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2272 return Error("Invalid BR record");
2274 if (Record.size() == 1) {
2275 I = BranchInst::Create(TrueDest);
2276 InstructionList.push_back(I);
2279 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2280 Value *Cond = getValue(Record, 2, NextValueNo,
2281 Type::getInt1Ty(Context));
2282 if (FalseDest == 0 || Cond == 0)
2283 return Error("Invalid BR record");
2284 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2285 InstructionList.push_back(I);
2289 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2291 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
2292 // New SwitchInst format with case ranges.
2294 Type *OpTy = getTypeByID(Record[1]);
2295 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
2297 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
2298 BasicBlock *Default = getBasicBlock(Record[3]);
2299 if (OpTy == 0 || Cond == 0 || Default == 0)
2300 return Error("Invalid SWITCH record");
2302 unsigned NumCases = Record[4];
2304 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2305 InstructionList.push_back(SI);
2307 unsigned CurIdx = 5;
2308 for (unsigned i = 0; i != NumCases; ++i) {
2309 IntegersSubsetToBB CaseBuilder;
2310 unsigned NumItems = Record[CurIdx++];
2311 for (unsigned ci = 0; ci != NumItems; ++ci) {
2312 bool isSingleNumber = Record[CurIdx++];
2315 unsigned ActiveWords = 1;
2316 if (ValueBitWidth > 64)
2317 ActiveWords = Record[CurIdx++];
2318 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2320 CurIdx += ActiveWords;
2322 if (!isSingleNumber) {
2324 if (ValueBitWidth > 64)
2325 ActiveWords = Record[CurIdx++];
2327 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2330 CaseBuilder.add(IntItem::fromType(OpTy, Low),
2331 IntItem::fromType(OpTy, High));
2332 CurIdx += ActiveWords;
2334 CaseBuilder.add(IntItem::fromType(OpTy, Low));
2336 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
2337 IntegersSubset Case = CaseBuilder.getCase();
2338 SI->addCase(Case, DestBB);
2340 uint16_t Hash = SI->hash();
2341 if (Hash != (Record[0] & 0xFFFF))
2342 return Error("Invalid SWITCH record");
2347 // Old SwitchInst format without case ranges.
2349 if (Record.size() < 3 || (Record.size() & 1) == 0)
2350 return Error("Invalid SWITCH record");
2351 Type *OpTy = getTypeByID(Record[0]);
2352 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
2353 BasicBlock *Default = getBasicBlock(Record[2]);
2354 if (OpTy == 0 || Cond == 0 || Default == 0)
2355 return Error("Invalid SWITCH record");
2356 unsigned NumCases = (Record.size()-3)/2;
2357 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2358 InstructionList.push_back(SI);
2359 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2360 ConstantInt *CaseVal =
2361 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2362 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2363 if (CaseVal == 0 || DestBB == 0) {
2365 return Error("Invalid SWITCH record!");
2367 SI->addCase(CaseVal, DestBB);
2372 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2373 if (Record.size() < 2)
2374 return Error("Invalid INDIRECTBR record");
2375 Type *OpTy = getTypeByID(Record[0]);
2376 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
2377 if (OpTy == 0 || Address == 0)
2378 return Error("Invalid INDIRECTBR record");
2379 unsigned NumDests = Record.size()-2;
2380 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2381 InstructionList.push_back(IBI);
2382 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2383 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2384 IBI->addDestination(DestBB);
2387 return Error("Invalid INDIRECTBR record!");
2394 case bitc::FUNC_CODE_INST_INVOKE: {
2395 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2396 if (Record.size() < 4) return Error("Invalid INVOKE record");
2397 AttributeSet PAL = getAttributes(Record[0]);
2398 unsigned CCInfo = Record[1];
2399 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2400 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2404 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2405 return Error("Invalid INVOKE record");
2407 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2408 FunctionType *FTy = !CalleeTy ? 0 :
2409 dyn_cast<FunctionType>(CalleeTy->getElementType());
2411 // Check that the right number of fixed parameters are here.
2412 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2413 Record.size() < OpNum+FTy->getNumParams())
2414 return Error("Invalid INVOKE record");
2416 SmallVector<Value*, 16> Ops;
2417 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2418 Ops.push_back(getValue(Record, OpNum, NextValueNo,
2419 FTy->getParamType(i)));
2420 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2423 if (!FTy->isVarArg()) {
2424 if (Record.size() != OpNum)
2425 return Error("Invalid INVOKE record");
2427 // Read type/value pairs for varargs params.
2428 while (OpNum != Record.size()) {
2430 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2431 return Error("Invalid INVOKE record");
2436 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
2437 InstructionList.push_back(I);
2438 cast<InvokeInst>(I)->setCallingConv(
2439 static_cast<CallingConv::ID>(CCInfo));
2440 cast<InvokeInst>(I)->setAttributes(PAL);
2443 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
2446 if (getValueTypePair(Record, Idx, NextValueNo, Val))
2447 return Error("Invalid RESUME record");
2448 I = ResumeInst::Create(Val);
2449 InstructionList.push_back(I);
2452 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2453 I = new UnreachableInst(Context);
2454 InstructionList.push_back(I);
2456 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2457 if (Record.size() < 1 || ((Record.size()-1)&1))
2458 return Error("Invalid PHI record");
2459 Type *Ty = getTypeByID(Record[0]);
2460 if (!Ty) return Error("Invalid PHI record");
2462 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2463 InstructionList.push_back(PN);
2465 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2467 // With the new function encoding, it is possible that operands have
2468 // negative IDs (for forward references). Use a signed VBR
2469 // representation to keep the encoding small.
2471 V = getValueSigned(Record, 1+i, NextValueNo, Ty);
2473 V = getValue(Record, 1+i, NextValueNo, Ty);
2474 BasicBlock *BB = getBasicBlock(Record[2+i]);
2475 if (!V || !BB) return Error("Invalid PHI record");
2476 PN->addIncoming(V, BB);
2482 case bitc::FUNC_CODE_INST_LANDINGPAD: {
2483 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
2485 if (Record.size() < 4)
2486 return Error("Invalid LANDINGPAD record");
2487 Type *Ty = getTypeByID(Record[Idx++]);
2488 if (!Ty) return Error("Invalid LANDINGPAD record");
2490 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
2491 return Error("Invalid LANDINGPAD record");
2493 bool IsCleanup = !!Record[Idx++];
2494 unsigned NumClauses = Record[Idx++];
2495 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
2496 LP->setCleanup(IsCleanup);
2497 for (unsigned J = 0; J != NumClauses; ++J) {
2498 LandingPadInst::ClauseType CT =
2499 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
2502 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
2504 return Error("Invalid LANDINGPAD record");
2507 assert((CT != LandingPadInst::Catch ||
2508 !isa<ArrayType>(Val->getType())) &&
2509 "Catch clause has a invalid type!");
2510 assert((CT != LandingPadInst::Filter ||
2511 isa<ArrayType>(Val->getType())) &&
2512 "Filter clause has invalid type!");
2517 InstructionList.push_back(I);
2521 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2522 if (Record.size() != 4)
2523 return Error("Invalid ALLOCA record");
2525 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2526 Type *OpTy = getTypeByID(Record[1]);
2527 Value *Size = getFnValueByID(Record[2], OpTy);
2528 unsigned Align = Record[3];
2529 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2530 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2531 InstructionList.push_back(I);
2534 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2537 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2538 OpNum+2 != Record.size())
2539 return Error("Invalid LOAD record");
2541 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2542 InstructionList.push_back(I);
2545 case bitc::FUNC_CODE_INST_LOADATOMIC: {
2546 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
2549 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2550 OpNum+4 != Record.size())
2551 return Error("Invalid LOADATOMIC record");
2554 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2555 if (Ordering == NotAtomic || Ordering == Release ||
2556 Ordering == AcquireRelease)
2557 return Error("Invalid LOADATOMIC record");
2558 if (Ordering != NotAtomic && Record[OpNum] == 0)
2559 return Error("Invalid LOADATOMIC record");
2560 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2562 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2563 Ordering, SynchScope);
2564 InstructionList.push_back(I);
2567 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
2570 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2571 popValue(Record, OpNum, NextValueNo,
2572 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2573 OpNum+2 != Record.size())
2574 return Error("Invalid STORE record");
2576 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2577 InstructionList.push_back(I);
2580 case bitc::FUNC_CODE_INST_STOREATOMIC: {
2581 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
2584 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2585 popValue(Record, OpNum, NextValueNo,
2586 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2587 OpNum+4 != Record.size())
2588 return Error("Invalid STOREATOMIC record");
2590 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2591 if (Ordering == NotAtomic || Ordering == Acquire ||
2592 Ordering == AcquireRelease)
2593 return Error("Invalid STOREATOMIC record");
2594 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2595 if (Ordering != NotAtomic && Record[OpNum] == 0)
2596 return Error("Invalid STOREATOMIC record");
2598 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2599 Ordering, SynchScope);
2600 InstructionList.push_back(I);
2603 case bitc::FUNC_CODE_INST_CMPXCHG: {
2604 // CMPXCHG:[ptrty, ptr, cmp, new, vol, ordering, synchscope]
2606 Value *Ptr, *Cmp, *New;
2607 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2608 popValue(Record, OpNum, NextValueNo,
2609 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
2610 popValue(Record, OpNum, NextValueNo,
2611 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
2612 OpNum+3 != Record.size())
2613 return Error("Invalid CMPXCHG record");
2614 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+1]);
2615 if (Ordering == NotAtomic || Ordering == Unordered)
2616 return Error("Invalid CMPXCHG record");
2617 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
2618 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, SynchScope);
2619 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
2620 InstructionList.push_back(I);
2623 case bitc::FUNC_CODE_INST_ATOMICRMW: {
2624 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
2627 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2628 popValue(Record, OpNum, NextValueNo,
2629 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2630 OpNum+4 != Record.size())
2631 return Error("Invalid ATOMICRMW record");
2632 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
2633 if (Operation < AtomicRMWInst::FIRST_BINOP ||
2634 Operation > AtomicRMWInst::LAST_BINOP)
2635 return Error("Invalid ATOMICRMW record");
2636 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2637 if (Ordering == NotAtomic || Ordering == Unordered)
2638 return Error("Invalid ATOMICRMW record");
2639 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2640 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
2641 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
2642 InstructionList.push_back(I);
2645 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
2646 if (2 != Record.size())
2647 return Error("Invalid FENCE record");
2648 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
2649 if (Ordering == NotAtomic || Ordering == Unordered ||
2650 Ordering == Monotonic)
2651 return Error("Invalid FENCE record");
2652 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
2653 I = new FenceInst(Context, Ordering, SynchScope);
2654 InstructionList.push_back(I);
2657 case bitc::FUNC_CODE_INST_CALL: {
2658 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2659 if (Record.size() < 3)
2660 return Error("Invalid CALL record");
2662 AttributeSet PAL = getAttributes(Record[0]);
2663 unsigned CCInfo = Record[1];
2667 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2668 return Error("Invalid CALL record");
2670 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2671 FunctionType *FTy = 0;
2672 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2673 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2674 return Error("Invalid CALL record");
2676 SmallVector<Value*, 16> Args;
2677 // Read the fixed params.
2678 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2679 if (FTy->getParamType(i)->isLabelTy())
2680 Args.push_back(getBasicBlock(Record[OpNum]));
2682 Args.push_back(getValue(Record, OpNum, NextValueNo,
2683 FTy->getParamType(i)));
2684 if (Args.back() == 0) return Error("Invalid CALL record");
2687 // Read type/value pairs for varargs params.
2688 if (!FTy->isVarArg()) {
2689 if (OpNum != Record.size())
2690 return Error("Invalid CALL record");
2692 while (OpNum != Record.size()) {
2694 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2695 return Error("Invalid CALL record");
2700 I = CallInst::Create(Callee, Args);
2701 InstructionList.push_back(I);
2702 cast<CallInst>(I)->setCallingConv(
2703 static_cast<CallingConv::ID>(CCInfo>>1));
2704 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2705 cast<CallInst>(I)->setAttributes(PAL);
2708 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2709 if (Record.size() < 3)
2710 return Error("Invalid VAARG record");
2711 Type *OpTy = getTypeByID(Record[0]);
2712 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
2713 Type *ResTy = getTypeByID(Record[2]);
2714 if (!OpTy || !Op || !ResTy)
2715 return Error("Invalid VAARG record");
2716 I = new VAArgInst(Op, ResTy);
2717 InstructionList.push_back(I);
2722 // Add instruction to end of current BB. If there is no current BB, reject
2726 return Error("Invalid instruction with no BB");
2728 CurBB->getInstList().push_back(I);
2730 // If this was a terminator instruction, move to the next block.
2731 if (isa<TerminatorInst>(I)) {
2733 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2736 // Non-void values get registered in the value table for future use.
2737 if (I && !I->getType()->isVoidTy())
2738 ValueList.AssignValue(I, NextValueNo++);
2741 // Check the function list for unresolved values.
2742 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2743 if (A->getParent() == 0) {
2744 // We found at least one unresolved value. Nuke them all to avoid leaks.
2745 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2746 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2747 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2751 return Error("Never resolved value found in function!");
2755 // FIXME: Check for unresolved forward-declared metadata references
2756 // and clean up leaks.
2758 // See if anything took the address of blocks in this function. If so,
2759 // resolve them now.
2760 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2761 BlockAddrFwdRefs.find(F);
2762 if (BAFRI != BlockAddrFwdRefs.end()) {
2763 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2764 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2765 unsigned BlockIdx = RefList[i].first;
2766 if (BlockIdx >= FunctionBBs.size())
2767 return Error("Invalid blockaddress block #");
2769 GlobalVariable *FwdRef = RefList[i].second;
2770 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2771 FwdRef->eraseFromParent();
2774 BlockAddrFwdRefs.erase(BAFRI);
2777 // Trim the value list down to the size it was before we parsed this function.
2778 ValueList.shrinkTo(ModuleValueListSize);
2779 MDValueList.shrinkTo(ModuleMDValueListSize);
2780 std::vector<BasicBlock*>().swap(FunctionBBs);
2784 /// FindFunctionInStream - Find the function body in the bitcode stream
2785 bool BitcodeReader::FindFunctionInStream(Function *F,
2786 DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator) {
2787 while (DeferredFunctionInfoIterator->second == 0) {
2788 if (Stream.AtEndOfStream())
2789 return Error("Could not find Function in stream");
2790 // ParseModule will parse the next body in the stream and set its
2791 // position in the DeferredFunctionInfo map.
2792 if (ParseModule(true)) return true;
2797 //===----------------------------------------------------------------------===//
2798 // GVMaterializer implementation
2799 //===----------------------------------------------------------------------===//
2802 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2803 if (const Function *F = dyn_cast<Function>(GV)) {
2804 return F->isDeclaration() &&
2805 DeferredFunctionInfo.count(const_cast<Function*>(F));
2810 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2811 Function *F = dyn_cast<Function>(GV);
2812 // If it's not a function or is already material, ignore the request.
2813 if (!F || !F->isMaterializable()) return false;
2815 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2816 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2817 // If its position is recorded as 0, its body is somewhere in the stream
2818 // but we haven't seen it yet.
2819 if (DFII->second == 0)
2820 if (LazyStreamer && FindFunctionInStream(F, DFII)) return true;
2822 // Move the bit stream to the saved position of the deferred function body.
2823 Stream.JumpToBit(DFII->second);
2825 if (ParseFunctionBody(F)) {
2826 if (ErrInfo) *ErrInfo = ErrorString;
2830 // Upgrade any old intrinsic calls in the function.
2831 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2832 E = UpgradedIntrinsics.end(); I != E; ++I) {
2833 if (I->first != I->second) {
2834 for (Value::use_iterator UI = I->first->use_begin(),
2835 UE = I->first->use_end(); UI != UE; ) {
2836 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2837 UpgradeIntrinsicCall(CI, I->second);
2845 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2846 const Function *F = dyn_cast<Function>(GV);
2847 if (!F || F->isDeclaration())
2849 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2852 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2853 Function *F = dyn_cast<Function>(GV);
2854 // If this function isn't dematerializable, this is a noop.
2855 if (!F || !isDematerializable(F))
2858 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2860 // Just forget the function body, we can remat it later.
2865 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2866 assert(M == TheModule &&
2867 "Can only Materialize the Module this BitcodeReader is attached to.");
2868 // Iterate over the module, deserializing any functions that are still on
2870 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2872 if (F->isMaterializable() &&
2873 Materialize(F, ErrInfo))
2876 // At this point, if there are any function bodies, the current bit is
2877 // pointing to the END_BLOCK record after them. Now make sure the rest
2878 // of the bits in the module have been read.
2882 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2883 // delete the old functions to clean up. We can't do this unless the entire
2884 // module is materialized because there could always be another function body
2885 // with calls to the old function.
2886 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2887 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2888 if (I->first != I->second) {
2889 for (Value::use_iterator UI = I->first->use_begin(),
2890 UE = I->first->use_end(); UI != UE; ) {
2891 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2892 UpgradeIntrinsicCall(CI, I->second);
2894 if (!I->first->use_empty())
2895 I->first->replaceAllUsesWith(I->second);
2896 I->first->eraseFromParent();
2899 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2904 bool BitcodeReader::InitStream() {
2905 if (LazyStreamer) return InitLazyStream();
2906 return InitStreamFromBuffer();
2909 bool BitcodeReader::InitStreamFromBuffer() {
2910 const unsigned char *BufPtr = (const unsigned char*)Buffer->getBufferStart();
2911 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
2913 if (Buffer->getBufferSize() & 3) {
2914 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
2915 return Error("Invalid bitcode signature");
2917 return Error("Bitcode stream should be a multiple of 4 bytes in length");
2920 // If we have a wrapper header, parse it and ignore the non-bc file contents.
2921 // The magic number is 0x0B17C0DE stored in little endian.
2922 if (isBitcodeWrapper(BufPtr, BufEnd))
2923 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
2924 return Error("Invalid bitcode wrapper header");
2926 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
2927 Stream.init(*StreamFile);
2932 bool BitcodeReader::InitLazyStream() {
2933 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
2935 StreamingMemoryObject *Bytes = new StreamingMemoryObject(LazyStreamer);
2936 StreamFile.reset(new BitstreamReader(Bytes));
2937 Stream.init(*StreamFile);
2939 unsigned char buf[16];
2940 if (Bytes->readBytes(0, 16, buf, NULL) == -1)
2941 return Error("Bitcode stream must be at least 16 bytes in length");
2943 if (!isBitcode(buf, buf + 16))
2944 return Error("Invalid bitcode signature");
2946 if (isBitcodeWrapper(buf, buf + 4)) {
2947 const unsigned char *bitcodeStart = buf;
2948 const unsigned char *bitcodeEnd = buf + 16;
2949 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
2950 Bytes->dropLeadingBytes(bitcodeStart - buf);
2951 Bytes->setKnownObjectSize(bitcodeEnd - bitcodeStart);
2956 //===----------------------------------------------------------------------===//
2957 // External interface
2958 //===----------------------------------------------------------------------===//
2960 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2962 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2963 LLVMContext& Context,
2964 std::string *ErrMsg) {
2965 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2966 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2967 M->setMaterializer(R);
2968 if (R->ParseBitcodeInto(M)) {
2970 *ErrMsg = R->getErrorString();
2972 delete M; // Also deletes R.
2975 // Have the BitcodeReader dtor delete 'Buffer'.
2976 R->setBufferOwned(true);
2978 R->materializeForwardReferencedFunctions();
2984 Module *llvm::getStreamedBitcodeModule(const std::string &name,
2985 DataStreamer *streamer,
2986 LLVMContext &Context,
2987 std::string *ErrMsg) {
2988 Module *M = new Module(name, Context);
2989 BitcodeReader *R = new BitcodeReader(streamer, Context);
2990 M->setMaterializer(R);
2991 if (R->ParseBitcodeInto(M)) {
2993 *ErrMsg = R->getErrorString();
2994 delete M; // Also deletes R.
2997 R->setBufferOwned(false); // no buffer to delete
3001 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
3002 /// If an error occurs, return null and fill in *ErrMsg if non-null.
3003 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
3004 std::string *ErrMsg){
3005 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
3008 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
3009 // there was an error.
3010 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
3012 // Read in the entire module, and destroy the BitcodeReader.
3013 if (M->MaterializeAllPermanently(ErrMsg)) {
3018 // TODO: Restore the use-lists to the in-memory state when the bitcode was
3019 // written. We must defer until the Module has been fully materialized.
3024 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
3025 LLVMContext& Context,
3026 std::string *ErrMsg) {
3027 BitcodeReader *R = new BitcodeReader(Buffer, Context);
3028 // Don't let the BitcodeReader dtor delete 'Buffer'.
3029 R->setBufferOwned(false);
3031 std::string Triple("");
3032 if (R->ParseTriple(Triple))
3034 *ErrMsg = R->getErrorString();