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 //===----------------------------------------------------------------------===//
432 /// \brief This fills an AttrBuilder object with the LLVM attributes that have
433 /// been decoded from the given integer. This function must stay in sync with
434 /// 'encodeLLVMAttributesForBitcode'.
435 static void decodeLLVMAttributesForBitcode(AttrBuilder &B,
436 uint64_t EncodedAttrs) {
437 // FIXME: Remove in 4.0.
439 // The alignment is stored as a 16-bit raw value from bits 31--16. We shift
440 // the bits above 31 down by 11 bits.
441 unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16;
442 assert((!Alignment || isPowerOf2_32(Alignment)) &&
443 "Alignment must be a power of two.");
446 B.addAlignmentAttr(Alignment);
447 B.addRawValue(((EncodedAttrs & (0xffffULL << 32)) >> 11) |
448 (EncodedAttrs & 0xffff));
451 bool BitcodeReader::ParseAttributeBlock() {
452 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
453 return Error("Malformed block record");
455 if (!MAttributes.empty())
456 return Error("Multiple PARAMATTR blocks found!");
458 SmallVector<uint64_t, 64> Record;
460 SmallVector<AttributeSet, 8> Attrs;
462 // Read all the records.
464 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
466 switch (Entry.Kind) {
467 case BitstreamEntry::SubBlock: // Handled for us already.
468 case BitstreamEntry::Error:
469 return Error("Error at end of PARAMATTR block");
470 case BitstreamEntry::EndBlock:
472 case BitstreamEntry::Record:
473 // The interesting case.
479 switch (Stream.readRecord(Entry.ID, Record)) {
480 default: // Default behavior: ignore.
482 case bitc::PARAMATTR_CODE_ENTRY_OLD: { // ENTRY: [paramidx0, attr0, ...]
483 // FIXME: Remove in 4.0.
484 if (Record.size() & 1)
485 return Error("Invalid ENTRY record");
487 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
489 decodeLLVMAttributesForBitcode(B, Record[i+1]);
490 Attrs.push_back(AttributeSet::get(Context, Record[i], B));
493 MAttributes.push_back(AttributeSet::get(Context, Attrs));
501 bool BitcodeReader::ParseTypeTable() {
502 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
503 return Error("Malformed block record");
505 return ParseTypeTableBody();
508 bool BitcodeReader::ParseTypeTableBody() {
509 if (!TypeList.empty())
510 return Error("Multiple TYPE_BLOCKs found!");
512 SmallVector<uint64_t, 64> Record;
513 unsigned NumRecords = 0;
515 SmallString<64> TypeName;
517 // Read all the records for this type table.
519 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
521 switch (Entry.Kind) {
522 case BitstreamEntry::SubBlock: // Handled for us already.
523 case BitstreamEntry::Error:
524 Error("Error in the type table block");
526 case BitstreamEntry::EndBlock:
527 if (NumRecords != TypeList.size())
528 return Error("Invalid type forward reference in TYPE_BLOCK");
530 case BitstreamEntry::Record:
531 // The interesting case.
538 switch (Stream.readRecord(Entry.ID, Record)) {
539 default: return Error("unknown type in type table");
540 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
541 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
542 // type list. This allows us to reserve space.
543 if (Record.size() < 1)
544 return Error("Invalid TYPE_CODE_NUMENTRY record");
545 TypeList.resize(Record[0]);
547 case bitc::TYPE_CODE_VOID: // VOID
548 ResultTy = Type::getVoidTy(Context);
550 case bitc::TYPE_CODE_HALF: // HALF
551 ResultTy = Type::getHalfTy(Context);
553 case bitc::TYPE_CODE_FLOAT: // FLOAT
554 ResultTy = Type::getFloatTy(Context);
556 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
557 ResultTy = Type::getDoubleTy(Context);
559 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
560 ResultTy = Type::getX86_FP80Ty(Context);
562 case bitc::TYPE_CODE_FP128: // FP128
563 ResultTy = Type::getFP128Ty(Context);
565 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
566 ResultTy = Type::getPPC_FP128Ty(Context);
568 case bitc::TYPE_CODE_LABEL: // LABEL
569 ResultTy = Type::getLabelTy(Context);
571 case bitc::TYPE_CODE_METADATA: // METADATA
572 ResultTy = Type::getMetadataTy(Context);
574 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
575 ResultTy = Type::getX86_MMXTy(Context);
577 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
578 if (Record.size() < 1)
579 return Error("Invalid Integer type record");
581 ResultTy = IntegerType::get(Context, Record[0]);
583 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
584 // [pointee type, address space]
585 if (Record.size() < 1)
586 return Error("Invalid POINTER type record");
587 unsigned AddressSpace = 0;
588 if (Record.size() == 2)
589 AddressSpace = Record[1];
590 ResultTy = getTypeByID(Record[0]);
591 if (ResultTy == 0) return Error("invalid element type in pointer type");
592 ResultTy = PointerType::get(ResultTy, AddressSpace);
595 case bitc::TYPE_CODE_FUNCTION_OLD: {
596 // FIXME: attrid is dead, remove it in LLVM 4.0
597 // FUNCTION: [vararg, attrid, retty, paramty x N]
598 if (Record.size() < 3)
599 return Error("Invalid FUNCTION type record");
600 SmallVector<Type*, 8> ArgTys;
601 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
602 if (Type *T = getTypeByID(Record[i]))
608 ResultTy = getTypeByID(Record[2]);
609 if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
610 return Error("invalid type in function type");
612 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
615 case bitc::TYPE_CODE_FUNCTION: {
616 // FUNCTION: [vararg, retty, paramty x N]
617 if (Record.size() < 2)
618 return Error("Invalid FUNCTION type record");
619 SmallVector<Type*, 8> ArgTys;
620 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
621 if (Type *T = getTypeByID(Record[i]))
627 ResultTy = getTypeByID(Record[1]);
628 if (ResultTy == 0 || ArgTys.size() < Record.size()-2)
629 return Error("invalid type in function type");
631 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
634 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
635 if (Record.size() < 1)
636 return Error("Invalid STRUCT type record");
637 SmallVector<Type*, 8> EltTys;
638 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
639 if (Type *T = getTypeByID(Record[i]))
644 if (EltTys.size() != Record.size()-1)
645 return Error("invalid type in struct type");
646 ResultTy = StructType::get(Context, EltTys, Record[0]);
649 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
650 if (ConvertToString(Record, 0, TypeName))
651 return Error("Invalid STRUCT_NAME record");
654 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
655 if (Record.size() < 1)
656 return Error("Invalid STRUCT type record");
658 if (NumRecords >= TypeList.size())
659 return Error("invalid TYPE table");
661 // Check to see if this was forward referenced, if so fill in the temp.
662 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
664 Res->setName(TypeName);
665 TypeList[NumRecords] = 0;
666 } else // Otherwise, create a new struct.
667 Res = StructType::create(Context, TypeName);
670 SmallVector<Type*, 8> EltTys;
671 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
672 if (Type *T = getTypeByID(Record[i]))
677 if (EltTys.size() != Record.size()-1)
678 return Error("invalid STRUCT type record");
679 Res->setBody(EltTys, Record[0]);
683 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
684 if (Record.size() != 1)
685 return Error("Invalid OPAQUE type record");
687 if (NumRecords >= TypeList.size())
688 return Error("invalid TYPE table");
690 // Check to see if this was forward referenced, if so fill in the temp.
691 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
693 Res->setName(TypeName);
694 TypeList[NumRecords] = 0;
695 } else // Otherwise, create a new struct with no body.
696 Res = StructType::create(Context, TypeName);
701 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
702 if (Record.size() < 2)
703 return Error("Invalid ARRAY type record");
704 if ((ResultTy = getTypeByID(Record[1])))
705 ResultTy = ArrayType::get(ResultTy, Record[0]);
707 return Error("Invalid ARRAY type element");
709 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
710 if (Record.size() < 2)
711 return Error("Invalid VECTOR type record");
712 if ((ResultTy = getTypeByID(Record[1])))
713 ResultTy = VectorType::get(ResultTy, Record[0]);
715 return Error("Invalid ARRAY type element");
719 if (NumRecords >= TypeList.size())
720 return Error("invalid TYPE table");
721 assert(ResultTy && "Didn't read a type?");
722 assert(TypeList[NumRecords] == 0 && "Already read type?");
723 TypeList[NumRecords++] = ResultTy;
727 bool BitcodeReader::ParseValueSymbolTable() {
728 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
729 return Error("Malformed block record");
731 SmallVector<uint64_t, 64> Record;
733 // Read all the records for this value table.
734 SmallString<128> ValueName;
736 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
738 switch (Entry.Kind) {
739 case BitstreamEntry::SubBlock: // Handled for us already.
740 case BitstreamEntry::Error:
741 return Error("malformed value symbol table block");
742 case BitstreamEntry::EndBlock:
744 case BitstreamEntry::Record:
745 // The interesting case.
751 switch (Stream.readRecord(Entry.ID, Record)) {
752 default: // Default behavior: unknown type.
754 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
755 if (ConvertToString(Record, 1, ValueName))
756 return Error("Invalid VST_ENTRY record");
757 unsigned ValueID = Record[0];
758 if (ValueID >= ValueList.size())
759 return Error("Invalid Value ID in VST_ENTRY record");
760 Value *V = ValueList[ValueID];
762 V->setName(StringRef(ValueName.data(), ValueName.size()));
766 case bitc::VST_CODE_BBENTRY: {
767 if (ConvertToString(Record, 1, ValueName))
768 return Error("Invalid VST_BBENTRY record");
769 BasicBlock *BB = getBasicBlock(Record[0]);
771 return Error("Invalid BB ID in VST_BBENTRY record");
773 BB->setName(StringRef(ValueName.data(), ValueName.size()));
781 bool BitcodeReader::ParseMetadata() {
782 unsigned NextMDValueNo = MDValueList.size();
784 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
785 return Error("Malformed block record");
787 SmallVector<uint64_t, 64> Record;
789 // Read all the records.
791 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
793 switch (Entry.Kind) {
794 case BitstreamEntry::SubBlock: // Handled for us already.
795 case BitstreamEntry::Error:
796 Error("malformed metadata block");
798 case BitstreamEntry::EndBlock:
800 case BitstreamEntry::Record:
801 // The interesting case.
805 bool IsFunctionLocal = false;
808 unsigned Code = Stream.readRecord(Entry.ID, Record);
810 default: // Default behavior: ignore.
812 case bitc::METADATA_NAME: {
813 // Read name of the named metadata.
814 SmallString<8> Name(Record.begin(), Record.end());
816 Code = Stream.ReadCode();
818 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
819 unsigned NextBitCode = Stream.readRecord(Code, Record);
820 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
822 // Read named metadata elements.
823 unsigned Size = Record.size();
824 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
825 for (unsigned i = 0; i != Size; ++i) {
826 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
828 return Error("Malformed metadata record");
833 case bitc::METADATA_FN_NODE:
834 IsFunctionLocal = true;
836 case bitc::METADATA_NODE: {
837 if (Record.size() % 2 == 1)
838 return Error("Invalid METADATA_NODE record");
840 unsigned Size = Record.size();
841 SmallVector<Value*, 8> Elts;
842 for (unsigned i = 0; i != Size; i += 2) {
843 Type *Ty = getTypeByID(Record[i]);
844 if (!Ty) return Error("Invalid METADATA_NODE record");
845 if (Ty->isMetadataTy())
846 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
847 else if (!Ty->isVoidTy())
848 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
850 Elts.push_back(NULL);
852 Value *V = MDNode::getWhenValsUnresolved(Context, Elts, IsFunctionLocal);
853 IsFunctionLocal = false;
854 MDValueList.AssignValue(V, NextMDValueNo++);
857 case bitc::METADATA_STRING: {
858 SmallString<8> String(Record.begin(), Record.end());
859 Value *V = MDString::get(Context, String);
860 MDValueList.AssignValue(V, NextMDValueNo++);
863 case bitc::METADATA_KIND: {
864 if (Record.size() < 2)
865 return Error("Invalid METADATA_KIND record");
867 unsigned Kind = Record[0];
868 SmallString<8> Name(Record.begin()+1, Record.end());
870 unsigned NewKind = TheModule->getMDKindID(Name.str());
871 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
872 return Error("Conflicting METADATA_KIND records");
879 /// decodeSignRotatedValue - Decode a signed value stored with the sign bit in
880 /// the LSB for dense VBR encoding.
881 uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
886 // There is no such thing as -0 with integers. "-0" really means MININT.
890 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
891 /// values and aliases that we can.
892 bool BitcodeReader::ResolveGlobalAndAliasInits() {
893 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
894 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
896 GlobalInitWorklist.swap(GlobalInits);
897 AliasInitWorklist.swap(AliasInits);
899 while (!GlobalInitWorklist.empty()) {
900 unsigned ValID = GlobalInitWorklist.back().second;
901 if (ValID >= ValueList.size()) {
902 // Not ready to resolve this yet, it requires something later in the file.
903 GlobalInits.push_back(GlobalInitWorklist.back());
905 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
906 GlobalInitWorklist.back().first->setInitializer(C);
908 return Error("Global variable initializer is not a constant!");
910 GlobalInitWorklist.pop_back();
913 while (!AliasInitWorklist.empty()) {
914 unsigned ValID = AliasInitWorklist.back().second;
915 if (ValID >= ValueList.size()) {
916 AliasInits.push_back(AliasInitWorklist.back());
918 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
919 AliasInitWorklist.back().first->setAliasee(C);
921 return Error("Alias initializer is not a constant!");
923 AliasInitWorklist.pop_back();
928 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
929 SmallVector<uint64_t, 8> Words(Vals.size());
930 std::transform(Vals.begin(), Vals.end(), Words.begin(),
931 BitcodeReader::decodeSignRotatedValue);
933 return APInt(TypeBits, Words);
936 bool BitcodeReader::ParseConstants() {
937 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
938 return Error("Malformed block record");
940 SmallVector<uint64_t, 64> Record;
942 // Read all the records for this value table.
943 Type *CurTy = Type::getInt32Ty(Context);
944 unsigned NextCstNo = ValueList.size();
946 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
948 switch (Entry.Kind) {
949 case BitstreamEntry::SubBlock: // Handled for us already.
950 case BitstreamEntry::Error:
951 return Error("malformed block record in AST file");
952 case BitstreamEntry::EndBlock:
953 if (NextCstNo != ValueList.size())
954 return Error("Invalid constant reference!");
956 // Once all the constants have been read, go through and resolve forward
958 ValueList.ResolveConstantForwardRefs();
960 case BitstreamEntry::Record:
961 // The interesting case.
968 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
970 default: // Default behavior: unknown constant
971 case bitc::CST_CODE_UNDEF: // UNDEF
972 V = UndefValue::get(CurTy);
974 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
976 return Error("Malformed CST_SETTYPE record");
977 if (Record[0] >= TypeList.size())
978 return Error("Invalid Type ID in CST_SETTYPE record");
979 CurTy = TypeList[Record[0]];
980 continue; // Skip the ValueList manipulation.
981 case bitc::CST_CODE_NULL: // NULL
982 V = Constant::getNullValue(CurTy);
984 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
985 if (!CurTy->isIntegerTy() || Record.empty())
986 return Error("Invalid CST_INTEGER record");
987 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
989 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
990 if (!CurTy->isIntegerTy() || Record.empty())
991 return Error("Invalid WIDE_INTEGER record");
993 APInt VInt = ReadWideAPInt(Record,
994 cast<IntegerType>(CurTy)->getBitWidth());
995 V = ConstantInt::get(Context, VInt);
999 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1001 return Error("Invalid FLOAT record");
1002 if (CurTy->isHalfTy())
1003 V = ConstantFP::get(Context, APFloat(APFloat::IEEEhalf,
1004 APInt(16, (uint16_t)Record[0])));
1005 else if (CurTy->isFloatTy())
1006 V = ConstantFP::get(Context, APFloat(APFloat::IEEEsingle,
1007 APInt(32, (uint32_t)Record[0])));
1008 else if (CurTy->isDoubleTy())
1009 V = ConstantFP::get(Context, APFloat(APFloat::IEEEdouble,
1010 APInt(64, Record[0])));
1011 else if (CurTy->isX86_FP80Ty()) {
1012 // Bits are not stored the same way as a normal i80 APInt, compensate.
1013 uint64_t Rearrange[2];
1014 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1015 Rearrange[1] = Record[0] >> 48;
1016 V = ConstantFP::get(Context, APFloat(APFloat::x87DoubleExtended,
1017 APInt(80, Rearrange)));
1018 } else if (CurTy->isFP128Ty())
1019 V = ConstantFP::get(Context, APFloat(APFloat::IEEEquad,
1020 APInt(128, Record)));
1021 else if (CurTy->isPPC_FP128Ty())
1022 V = ConstantFP::get(Context, APFloat(APFloat::PPCDoubleDouble,
1023 APInt(128, Record)));
1025 V = UndefValue::get(CurTy);
1029 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1031 return Error("Invalid CST_AGGREGATE record");
1033 unsigned Size = Record.size();
1034 SmallVector<Constant*, 16> Elts;
1036 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1037 for (unsigned i = 0; i != Size; ++i)
1038 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1039 STy->getElementType(i)));
1040 V = ConstantStruct::get(STy, Elts);
1041 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1042 Type *EltTy = ATy->getElementType();
1043 for (unsigned i = 0; i != Size; ++i)
1044 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1045 V = ConstantArray::get(ATy, Elts);
1046 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1047 Type *EltTy = VTy->getElementType();
1048 for (unsigned i = 0; i != Size; ++i)
1049 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1050 V = ConstantVector::get(Elts);
1052 V = UndefValue::get(CurTy);
1056 case bitc::CST_CODE_STRING: // STRING: [values]
1057 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1059 return Error("Invalid CST_STRING record");
1061 SmallString<16> Elts(Record.begin(), Record.end());
1062 V = ConstantDataArray::getString(Context, Elts,
1063 BitCode == bitc::CST_CODE_CSTRING);
1066 case bitc::CST_CODE_DATA: {// DATA: [n x value]
1068 return Error("Invalid CST_DATA record");
1070 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
1071 unsigned Size = Record.size();
1073 if (EltTy->isIntegerTy(8)) {
1074 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
1075 if (isa<VectorType>(CurTy))
1076 V = ConstantDataVector::get(Context, Elts);
1078 V = ConstantDataArray::get(Context, Elts);
1079 } else if (EltTy->isIntegerTy(16)) {
1080 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
1081 if (isa<VectorType>(CurTy))
1082 V = ConstantDataVector::get(Context, Elts);
1084 V = ConstantDataArray::get(Context, Elts);
1085 } else if (EltTy->isIntegerTy(32)) {
1086 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
1087 if (isa<VectorType>(CurTy))
1088 V = ConstantDataVector::get(Context, Elts);
1090 V = ConstantDataArray::get(Context, Elts);
1091 } else if (EltTy->isIntegerTy(64)) {
1092 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
1093 if (isa<VectorType>(CurTy))
1094 V = ConstantDataVector::get(Context, Elts);
1096 V = ConstantDataArray::get(Context, Elts);
1097 } else if (EltTy->isFloatTy()) {
1098 SmallVector<float, 16> Elts(Size);
1099 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
1100 if (isa<VectorType>(CurTy))
1101 V = ConstantDataVector::get(Context, Elts);
1103 V = ConstantDataArray::get(Context, Elts);
1104 } else if (EltTy->isDoubleTy()) {
1105 SmallVector<double, 16> Elts(Size);
1106 std::transform(Record.begin(), Record.end(), Elts.begin(),
1108 if (isa<VectorType>(CurTy))
1109 V = ConstantDataVector::get(Context, Elts);
1111 V = ConstantDataArray::get(Context, Elts);
1113 return Error("Unknown element type in CE_DATA");
1118 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1119 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1120 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1122 V = UndefValue::get(CurTy); // Unknown binop.
1124 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1125 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1127 if (Record.size() >= 4) {
1128 if (Opc == Instruction::Add ||
1129 Opc == Instruction::Sub ||
1130 Opc == Instruction::Mul ||
1131 Opc == Instruction::Shl) {
1132 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1133 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1134 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1135 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1136 } else if (Opc == Instruction::SDiv ||
1137 Opc == Instruction::UDiv ||
1138 Opc == Instruction::LShr ||
1139 Opc == Instruction::AShr) {
1140 if (Record[3] & (1 << bitc::PEO_EXACT))
1141 Flags |= SDivOperator::IsExact;
1144 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1148 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1149 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1150 int Opc = GetDecodedCastOpcode(Record[0]);
1152 V = UndefValue::get(CurTy); // Unknown cast.
1154 Type *OpTy = getTypeByID(Record[1]);
1155 if (!OpTy) return Error("Invalid CE_CAST record");
1156 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1157 V = ConstantExpr::getCast(Opc, Op, CurTy);
1161 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1162 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1163 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1164 SmallVector<Constant*, 16> Elts;
1165 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1166 Type *ElTy = getTypeByID(Record[i]);
1167 if (!ElTy) return Error("Invalid CE_GEP record");
1168 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1170 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1171 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1173 bitc::CST_CODE_CE_INBOUNDS_GEP);
1176 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1177 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1178 V = ConstantExpr::getSelect(
1179 ValueList.getConstantFwdRef(Record[0],
1180 Type::getInt1Ty(Context)),
1181 ValueList.getConstantFwdRef(Record[1],CurTy),
1182 ValueList.getConstantFwdRef(Record[2],CurTy));
1184 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1185 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1187 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1188 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1189 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1190 Constant *Op1 = ValueList.getConstantFwdRef(Record[2],
1191 Type::getInt32Ty(Context));
1192 V = ConstantExpr::getExtractElement(Op0, Op1);
1195 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1196 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1197 if (Record.size() < 3 || OpTy == 0)
1198 return Error("Invalid CE_INSERTELT record");
1199 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1200 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1201 OpTy->getElementType());
1202 Constant *Op2 = ValueList.getConstantFwdRef(Record[2],
1203 Type::getInt32Ty(Context));
1204 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1207 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1208 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1209 if (Record.size() < 3 || OpTy == 0)
1210 return Error("Invalid CE_SHUFFLEVEC record");
1211 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1212 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1213 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1214 OpTy->getNumElements());
1215 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1216 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1219 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1220 VectorType *RTy = dyn_cast<VectorType>(CurTy);
1222 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1223 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1224 return Error("Invalid CE_SHUFVEC_EX record");
1225 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1226 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1227 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1228 RTy->getNumElements());
1229 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1230 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1233 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1234 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1235 Type *OpTy = getTypeByID(Record[0]);
1236 if (OpTy == 0) return Error("Invalid CE_CMP record");
1237 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1238 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1240 if (OpTy->isFPOrFPVectorTy())
1241 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1243 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1246 // This maintains backward compatibility, pre-asm dialect keywords.
1247 // FIXME: Remove with the 4.0 release.
1248 case bitc::CST_CODE_INLINEASM_OLD: {
1249 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1250 std::string AsmStr, ConstrStr;
1251 bool HasSideEffects = Record[0] & 1;
1252 bool IsAlignStack = Record[0] >> 1;
1253 unsigned AsmStrSize = Record[1];
1254 if (2+AsmStrSize >= Record.size())
1255 return Error("Invalid INLINEASM record");
1256 unsigned ConstStrSize = Record[2+AsmStrSize];
1257 if (3+AsmStrSize+ConstStrSize > Record.size())
1258 return Error("Invalid INLINEASM record");
1260 for (unsigned i = 0; i != AsmStrSize; ++i)
1261 AsmStr += (char)Record[2+i];
1262 for (unsigned i = 0; i != ConstStrSize; ++i)
1263 ConstrStr += (char)Record[3+AsmStrSize+i];
1264 PointerType *PTy = cast<PointerType>(CurTy);
1265 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1266 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1269 // This version adds support for the asm dialect keywords (e.g.,
1271 case bitc::CST_CODE_INLINEASM: {
1272 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1273 std::string AsmStr, ConstrStr;
1274 bool HasSideEffects = Record[0] & 1;
1275 bool IsAlignStack = (Record[0] >> 1) & 1;
1276 unsigned AsmDialect = Record[0] >> 2;
1277 unsigned AsmStrSize = Record[1];
1278 if (2+AsmStrSize >= Record.size())
1279 return Error("Invalid INLINEASM record");
1280 unsigned ConstStrSize = Record[2+AsmStrSize];
1281 if (3+AsmStrSize+ConstStrSize > Record.size())
1282 return Error("Invalid INLINEASM record");
1284 for (unsigned i = 0; i != AsmStrSize; ++i)
1285 AsmStr += (char)Record[2+i];
1286 for (unsigned i = 0; i != ConstStrSize; ++i)
1287 ConstrStr += (char)Record[3+AsmStrSize+i];
1288 PointerType *PTy = cast<PointerType>(CurTy);
1289 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1290 AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
1291 InlineAsm::AsmDialect(AsmDialect));
1294 case bitc::CST_CODE_BLOCKADDRESS:{
1295 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1296 Type *FnTy = getTypeByID(Record[0]);
1297 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1299 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1300 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1302 // If the function is already parsed we can insert the block address right
1305 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
1306 for (size_t I = 0, E = Record[2]; I != E; ++I) {
1308 return Error("Invalid blockaddress block #");
1311 V = BlockAddress::get(Fn, BBI);
1313 // Otherwise insert a placeholder and remember it so it can be inserted
1314 // when the function is parsed.
1315 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1316 Type::getInt8Ty(Context),
1317 false, GlobalValue::InternalLinkage,
1319 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1326 ValueList.AssignValue(V, NextCstNo);
1331 bool BitcodeReader::ParseUseLists() {
1332 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
1333 return Error("Malformed block record");
1335 SmallVector<uint64_t, 64> Record;
1337 // Read all the records.
1339 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1341 switch (Entry.Kind) {
1342 case BitstreamEntry::SubBlock: // Handled for us already.
1343 case BitstreamEntry::Error:
1344 return Error("malformed use list block");
1345 case BitstreamEntry::EndBlock:
1347 case BitstreamEntry::Record:
1348 // The interesting case.
1352 // Read a use list record.
1354 switch (Stream.readRecord(Entry.ID, Record)) {
1355 default: // Default behavior: unknown type.
1357 case bitc::USELIST_CODE_ENTRY: { // USELIST_CODE_ENTRY: TBD.
1358 unsigned RecordLength = Record.size();
1359 if (RecordLength < 1)
1360 return Error ("Invalid UseList reader!");
1361 UseListRecords.push_back(Record);
1368 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1369 /// remember where it is and then skip it. This lets us lazily deserialize the
1371 bool BitcodeReader::RememberAndSkipFunctionBody() {
1372 // Get the function we are talking about.
1373 if (FunctionsWithBodies.empty())
1374 return Error("Insufficient function protos");
1376 Function *Fn = FunctionsWithBodies.back();
1377 FunctionsWithBodies.pop_back();
1379 // Save the current stream state.
1380 uint64_t CurBit = Stream.GetCurrentBitNo();
1381 DeferredFunctionInfo[Fn] = CurBit;
1383 // Skip over the function block for now.
1384 if (Stream.SkipBlock())
1385 return Error("Malformed block record");
1389 bool BitcodeReader::GlobalCleanup() {
1390 // Patch the initializers for globals and aliases up.
1391 ResolveGlobalAndAliasInits();
1392 if (!GlobalInits.empty() || !AliasInits.empty())
1393 return Error("Malformed global initializer set");
1395 // Look for intrinsic functions which need to be upgraded at some point
1396 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1399 if (UpgradeIntrinsicFunction(FI, NewFn))
1400 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1403 // Look for global variables which need to be renamed.
1404 for (Module::global_iterator
1405 GI = TheModule->global_begin(), GE = TheModule->global_end();
1407 UpgradeGlobalVariable(GI);
1408 // Force deallocation of memory for these vectors to favor the client that
1409 // want lazy deserialization.
1410 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1411 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1415 bool BitcodeReader::ParseModule(bool Resume) {
1417 Stream.JumpToBit(NextUnreadBit);
1418 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1419 return Error("Malformed block record");
1421 SmallVector<uint64_t, 64> Record;
1422 std::vector<std::string> SectionTable;
1423 std::vector<std::string> GCTable;
1425 // Read all the records for this module.
1427 BitstreamEntry Entry = Stream.advance();
1429 switch (Entry.Kind) {
1430 case BitstreamEntry::Error:
1431 Error("malformed module block");
1433 case BitstreamEntry::EndBlock:
1434 return GlobalCleanup();
1436 case BitstreamEntry::SubBlock:
1438 default: // Skip unknown content.
1439 if (Stream.SkipBlock())
1440 return Error("Malformed block record");
1442 case bitc::BLOCKINFO_BLOCK_ID:
1443 if (Stream.ReadBlockInfoBlock())
1444 return Error("Malformed BlockInfoBlock");
1446 case bitc::PARAMATTR_BLOCK_ID:
1447 if (ParseAttributeBlock())
1450 case bitc::TYPE_BLOCK_ID_NEW:
1451 if (ParseTypeTable())
1454 case bitc::VALUE_SYMTAB_BLOCK_ID:
1455 if (ParseValueSymbolTable())
1457 SeenValueSymbolTable = true;
1459 case bitc::CONSTANTS_BLOCK_ID:
1460 if (ParseConstants() || ResolveGlobalAndAliasInits())
1463 case bitc::METADATA_BLOCK_ID:
1464 if (ParseMetadata())
1467 case bitc::FUNCTION_BLOCK_ID:
1468 // If this is the first function body we've seen, reverse the
1469 // FunctionsWithBodies list.
1470 if (!SeenFirstFunctionBody) {
1471 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1472 if (GlobalCleanup())
1474 SeenFirstFunctionBody = true;
1477 if (RememberAndSkipFunctionBody())
1479 // For streaming bitcode, suspend parsing when we reach the function
1480 // bodies. Subsequent materialization calls will resume it when
1481 // necessary. For streaming, the function bodies must be at the end of
1482 // the bitcode. If the bitcode file is old, the symbol table will be
1483 // at the end instead and will not have been seen yet. In this case,
1484 // just finish the parse now.
1485 if (LazyStreamer && SeenValueSymbolTable) {
1486 NextUnreadBit = Stream.GetCurrentBitNo();
1490 case bitc::USELIST_BLOCK_ID:
1491 if (ParseUseLists())
1497 case BitstreamEntry::Record:
1498 // The interesting case.
1504 switch (Stream.readRecord(Entry.ID, Record)) {
1505 default: break; // Default behavior, ignore unknown content.
1506 case bitc::MODULE_CODE_VERSION: { // VERSION: [version#]
1507 if (Record.size() < 1)
1508 return Error("Malformed MODULE_CODE_VERSION");
1509 // Only version #0 and #1 are supported so far.
1510 unsigned module_version = Record[0];
1511 switch (module_version) {
1512 default: return Error("Unknown bitstream version!");
1514 UseRelativeIDs = false;
1517 UseRelativeIDs = true;
1522 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1524 if (ConvertToString(Record, 0, S))
1525 return Error("Invalid MODULE_CODE_TRIPLE record");
1526 TheModule->setTargetTriple(S);
1529 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1531 if (ConvertToString(Record, 0, S))
1532 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1533 TheModule->setDataLayout(S);
1536 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1538 if (ConvertToString(Record, 0, S))
1539 return Error("Invalid MODULE_CODE_ASM record");
1540 TheModule->setModuleInlineAsm(S);
1543 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1544 // FIXME: Remove in 4.0.
1546 if (ConvertToString(Record, 0, S))
1547 return Error("Invalid MODULE_CODE_DEPLIB record");
1551 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1553 if (ConvertToString(Record, 0, S))
1554 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1555 SectionTable.push_back(S);
1558 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1560 if (ConvertToString(Record, 0, S))
1561 return Error("Invalid MODULE_CODE_GCNAME record");
1562 GCTable.push_back(S);
1565 // GLOBALVAR: [pointer type, isconst, initid,
1566 // linkage, alignment, section, visibility, threadlocal,
1568 case bitc::MODULE_CODE_GLOBALVAR: {
1569 if (Record.size() < 6)
1570 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1571 Type *Ty = getTypeByID(Record[0]);
1572 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1573 if (!Ty->isPointerTy())
1574 return Error("Global not a pointer type!");
1575 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1576 Ty = cast<PointerType>(Ty)->getElementType();
1578 bool isConstant = Record[1];
1579 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1580 unsigned Alignment = (1 << Record[4]) >> 1;
1581 std::string Section;
1583 if (Record[5]-1 >= SectionTable.size())
1584 return Error("Invalid section ID");
1585 Section = SectionTable[Record[5]-1];
1587 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1588 if (Record.size() > 6)
1589 Visibility = GetDecodedVisibility(Record[6]);
1591 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
1592 if (Record.size() > 7)
1593 TLM = GetDecodedThreadLocalMode(Record[7]);
1595 bool UnnamedAddr = false;
1596 if (Record.size() > 8)
1597 UnnamedAddr = Record[8];
1599 GlobalVariable *NewGV =
1600 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1602 NewGV->setAlignment(Alignment);
1603 if (!Section.empty())
1604 NewGV->setSection(Section);
1605 NewGV->setVisibility(Visibility);
1606 NewGV->setUnnamedAddr(UnnamedAddr);
1608 ValueList.push_back(NewGV);
1610 // Remember which value to use for the global initializer.
1611 if (unsigned InitID = Record[2])
1612 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1615 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1616 // alignment, section, visibility, gc, unnamed_addr]
1617 case bitc::MODULE_CODE_FUNCTION: {
1618 if (Record.size() < 8)
1619 return Error("Invalid MODULE_CODE_FUNCTION record");
1620 Type *Ty = getTypeByID(Record[0]);
1621 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1622 if (!Ty->isPointerTy())
1623 return Error("Function not a pointer type!");
1625 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1627 return Error("Function not a pointer to function type!");
1629 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1632 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1633 bool isProto = Record[2];
1634 Func->setLinkage(GetDecodedLinkage(Record[3]));
1635 Func->setAttributes(getAttributes(Record[4]));
1637 Func->setAlignment((1 << Record[5]) >> 1);
1639 if (Record[6]-1 >= SectionTable.size())
1640 return Error("Invalid section ID");
1641 Func->setSection(SectionTable[Record[6]-1]);
1643 Func->setVisibility(GetDecodedVisibility(Record[7]));
1644 if (Record.size() > 8 && Record[8]) {
1645 if (Record[8]-1 > GCTable.size())
1646 return Error("Invalid GC ID");
1647 Func->setGC(GCTable[Record[8]-1].c_str());
1649 bool UnnamedAddr = false;
1650 if (Record.size() > 9)
1651 UnnamedAddr = Record[9];
1652 Func->setUnnamedAddr(UnnamedAddr);
1653 ValueList.push_back(Func);
1655 // If this is a function with a body, remember the prototype we are
1656 // creating now, so that we can match up the body with them later.
1658 FunctionsWithBodies.push_back(Func);
1659 if (LazyStreamer) DeferredFunctionInfo[Func] = 0;
1663 // ALIAS: [alias type, aliasee val#, linkage]
1664 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1665 case bitc::MODULE_CODE_ALIAS: {
1666 if (Record.size() < 3)
1667 return Error("Invalid MODULE_ALIAS record");
1668 Type *Ty = getTypeByID(Record[0]);
1669 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1670 if (!Ty->isPointerTy())
1671 return Error("Function not a pointer type!");
1673 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1675 // Old bitcode files didn't have visibility field.
1676 if (Record.size() > 3)
1677 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1678 ValueList.push_back(NewGA);
1679 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1682 /// MODULE_CODE_PURGEVALS: [numvals]
1683 case bitc::MODULE_CODE_PURGEVALS:
1684 // Trim down the value list to the specified size.
1685 if (Record.size() < 1 || Record[0] > ValueList.size())
1686 return Error("Invalid MODULE_PURGEVALS record");
1687 ValueList.shrinkTo(Record[0]);
1694 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1697 if (InitStream()) return true;
1699 // Sniff for the signature.
1700 if (Stream.Read(8) != 'B' ||
1701 Stream.Read(8) != 'C' ||
1702 Stream.Read(4) != 0x0 ||
1703 Stream.Read(4) != 0xC ||
1704 Stream.Read(4) != 0xE ||
1705 Stream.Read(4) != 0xD)
1706 return Error("Invalid bitcode signature");
1708 // We expect a number of well-defined blocks, though we don't necessarily
1709 // need to understand them all.
1711 if (Stream.AtEndOfStream())
1714 BitstreamEntry Entry =
1715 Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
1717 switch (Entry.Kind) {
1718 case BitstreamEntry::Error:
1719 Error("malformed module file");
1721 case BitstreamEntry::EndBlock:
1724 case BitstreamEntry::SubBlock:
1726 case bitc::BLOCKINFO_BLOCK_ID:
1727 if (Stream.ReadBlockInfoBlock())
1728 return Error("Malformed BlockInfoBlock");
1730 case bitc::MODULE_BLOCK_ID:
1731 // Reject multiple MODULE_BLOCK's in a single bitstream.
1733 return Error("Multiple MODULE_BLOCKs in same stream");
1735 if (ParseModule(false))
1737 if (LazyStreamer) return false;
1740 if (Stream.SkipBlock())
1741 return Error("Malformed block record");
1745 case BitstreamEntry::Record:
1746 // There should be no records in the top-level of blocks.
1748 // The ranlib in Xcode 4 will align archive members by appending newlines
1749 // to the end of them. If this file size is a multiple of 4 but not 8, we
1750 // have to read and ignore these final 4 bytes :-(
1751 if (Stream.getAbbrevIDWidth() == 2 && Entry.ID == 2 &&
1752 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1753 Stream.AtEndOfStream())
1756 return Error("Invalid record at top-level");
1761 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1762 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1763 return Error("Malformed block record");
1765 SmallVector<uint64_t, 64> Record;
1767 // Read all the records for this module.
1769 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1771 switch (Entry.Kind) {
1772 case BitstreamEntry::SubBlock: // Handled for us already.
1773 case BitstreamEntry::Error:
1774 return Error("malformed module block");
1775 case BitstreamEntry::EndBlock:
1777 case BitstreamEntry::Record:
1778 // The interesting case.
1783 switch (Stream.readRecord(Entry.ID, Record)) {
1784 default: break; // Default behavior, ignore unknown content.
1785 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1787 if (ConvertToString(Record, 0, S))
1788 return Error("Invalid MODULE_CODE_TRIPLE record");
1797 bool BitcodeReader::ParseTriple(std::string &Triple) {
1798 if (InitStream()) return true;
1800 // Sniff for the signature.
1801 if (Stream.Read(8) != 'B' ||
1802 Stream.Read(8) != 'C' ||
1803 Stream.Read(4) != 0x0 ||
1804 Stream.Read(4) != 0xC ||
1805 Stream.Read(4) != 0xE ||
1806 Stream.Read(4) != 0xD)
1807 return Error("Invalid bitcode signature");
1809 // We expect a number of well-defined blocks, though we don't necessarily
1810 // need to understand them all.
1812 BitstreamEntry Entry = Stream.advance();
1814 switch (Entry.Kind) {
1815 case BitstreamEntry::Error:
1816 Error("malformed module file");
1818 case BitstreamEntry::EndBlock:
1821 case BitstreamEntry::SubBlock:
1822 if (Entry.ID == bitc::MODULE_BLOCK_ID)
1823 return ParseModuleTriple(Triple);
1825 // Ignore other sub-blocks.
1826 if (Stream.SkipBlock()) {
1827 Error("malformed block record in AST file");
1832 case BitstreamEntry::Record:
1833 Stream.skipRecord(Entry.ID);
1839 /// ParseMetadataAttachment - Parse metadata attachments.
1840 bool BitcodeReader::ParseMetadataAttachment() {
1841 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1842 return Error("Malformed block record");
1844 SmallVector<uint64_t, 64> Record;
1846 BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
1848 switch (Entry.Kind) {
1849 case BitstreamEntry::SubBlock: // Handled for us already.
1850 case BitstreamEntry::Error:
1851 return Error("malformed metadata block");
1852 case BitstreamEntry::EndBlock:
1854 case BitstreamEntry::Record:
1855 // The interesting case.
1859 // Read a metadata attachment record.
1861 switch (Stream.readRecord(Entry.ID, Record)) {
1862 default: // Default behavior: ignore.
1864 case bitc::METADATA_ATTACHMENT: {
1865 unsigned RecordLength = Record.size();
1866 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1867 return Error ("Invalid METADATA_ATTACHMENT reader!");
1868 Instruction *Inst = InstructionList[Record[0]];
1869 for (unsigned i = 1; i != RecordLength; i = i+2) {
1870 unsigned Kind = Record[i];
1871 DenseMap<unsigned, unsigned>::iterator I =
1872 MDKindMap.find(Kind);
1873 if (I == MDKindMap.end())
1874 return Error("Invalid metadata kind ID");
1875 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1876 Inst->setMetadata(I->second, cast<MDNode>(Node));
1884 /// ParseFunctionBody - Lazily parse the specified function body block.
1885 bool BitcodeReader::ParseFunctionBody(Function *F) {
1886 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1887 return Error("Malformed block record");
1889 InstructionList.clear();
1890 unsigned ModuleValueListSize = ValueList.size();
1891 unsigned ModuleMDValueListSize = MDValueList.size();
1893 // Add all the function arguments to the value table.
1894 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1895 ValueList.push_back(I);
1897 unsigned NextValueNo = ValueList.size();
1898 BasicBlock *CurBB = 0;
1899 unsigned CurBBNo = 0;
1903 // Read all the records.
1904 SmallVector<uint64_t, 64> Record;
1906 BitstreamEntry Entry = Stream.advance();
1908 switch (Entry.Kind) {
1909 case BitstreamEntry::Error:
1910 return Error("Bitcode error in function block");
1911 case BitstreamEntry::EndBlock:
1912 goto OutOfRecordLoop;
1914 case BitstreamEntry::SubBlock:
1916 default: // Skip unknown content.
1917 if (Stream.SkipBlock())
1918 return Error("Malformed block record");
1920 case bitc::CONSTANTS_BLOCK_ID:
1921 if (ParseConstants()) return true;
1922 NextValueNo = ValueList.size();
1924 case bitc::VALUE_SYMTAB_BLOCK_ID:
1925 if (ParseValueSymbolTable()) return true;
1927 case bitc::METADATA_ATTACHMENT_ID:
1928 if (ParseMetadataAttachment()) return true;
1930 case bitc::METADATA_BLOCK_ID:
1931 if (ParseMetadata()) return true;
1936 case BitstreamEntry::Record:
1937 // The interesting case.
1944 unsigned BitCode = Stream.readRecord(Entry.ID, Record);
1946 default: // Default behavior: reject
1947 return Error("Unknown instruction");
1948 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1949 if (Record.size() < 1 || Record[0] == 0)
1950 return Error("Invalid DECLAREBLOCKS record");
1951 // Create all the basic blocks for the function.
1952 FunctionBBs.resize(Record[0]);
1953 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1954 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1955 CurBB = FunctionBBs[0];
1958 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1959 // This record indicates that the last instruction is at the same
1960 // location as the previous instruction with a location.
1963 // Get the last instruction emitted.
1964 if (CurBB && !CurBB->empty())
1966 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1967 !FunctionBBs[CurBBNo-1]->empty())
1968 I = &FunctionBBs[CurBBNo-1]->back();
1970 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1971 I->setDebugLoc(LastLoc);
1975 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
1976 I = 0; // Get the last instruction emitted.
1977 if (CurBB && !CurBB->empty())
1979 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1980 !FunctionBBs[CurBBNo-1]->empty())
1981 I = &FunctionBBs[CurBBNo-1]->back();
1982 if (I == 0 || Record.size() < 4)
1983 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
1985 unsigned Line = Record[0], Col = Record[1];
1986 unsigned ScopeID = Record[2], IAID = Record[3];
1988 MDNode *Scope = 0, *IA = 0;
1989 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
1990 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
1991 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
1992 I->setDebugLoc(LastLoc);
1997 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
2000 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2001 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
2002 OpNum+1 > Record.size())
2003 return Error("Invalid BINOP record");
2005 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
2006 if (Opc == -1) return Error("Invalid BINOP record");
2007 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
2008 InstructionList.push_back(I);
2009 if (OpNum < Record.size()) {
2010 if (Opc == Instruction::Add ||
2011 Opc == Instruction::Sub ||
2012 Opc == Instruction::Mul ||
2013 Opc == Instruction::Shl) {
2014 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2015 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
2016 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2017 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
2018 } else if (Opc == Instruction::SDiv ||
2019 Opc == Instruction::UDiv ||
2020 Opc == Instruction::LShr ||
2021 Opc == Instruction::AShr) {
2022 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
2023 cast<BinaryOperator>(I)->setIsExact(true);
2024 } else if (isa<FPMathOperator>(I)) {
2026 if (0 != (Record[OpNum] & FastMathFlags::UnsafeAlgebra))
2027 FMF.setUnsafeAlgebra();
2028 if (0 != (Record[OpNum] & FastMathFlags::NoNaNs))
2030 if (0 != (Record[OpNum] & FastMathFlags::NoInfs))
2032 if (0 != (Record[OpNum] & FastMathFlags::NoSignedZeros))
2033 FMF.setNoSignedZeros();
2034 if (0 != (Record[OpNum] & FastMathFlags::AllowReciprocal))
2035 FMF.setAllowReciprocal();
2037 I->setFastMathFlags(FMF);
2043 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
2046 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2047 OpNum+2 != Record.size())
2048 return Error("Invalid CAST record");
2050 Type *ResTy = getTypeByID(Record[OpNum]);
2051 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
2052 if (Opc == -1 || ResTy == 0)
2053 return Error("Invalid CAST record");
2054 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
2055 InstructionList.push_back(I);
2058 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
2059 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
2062 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
2063 return Error("Invalid GEP record");
2065 SmallVector<Value*, 16> GEPIdx;
2066 while (OpNum != Record.size()) {
2068 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2069 return Error("Invalid GEP record");
2070 GEPIdx.push_back(Op);
2073 I = GetElementPtrInst::Create(BasePtr, GEPIdx);
2074 InstructionList.push_back(I);
2075 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
2076 cast<GetElementPtrInst>(I)->setIsInBounds(true);
2080 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
2081 // EXTRACTVAL: [opty, opval, n x indices]
2084 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2085 return Error("Invalid EXTRACTVAL record");
2087 SmallVector<unsigned, 4> EXTRACTVALIdx;
2088 for (unsigned RecSize = Record.size();
2089 OpNum != RecSize; ++OpNum) {
2090 uint64_t Index = Record[OpNum];
2091 if ((unsigned)Index != Index)
2092 return Error("Invalid EXTRACTVAL index");
2093 EXTRACTVALIdx.push_back((unsigned)Index);
2096 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
2097 InstructionList.push_back(I);
2101 case bitc::FUNC_CODE_INST_INSERTVAL: {
2102 // INSERTVAL: [opty, opval, opty, opval, n x indices]
2105 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2106 return Error("Invalid INSERTVAL record");
2108 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
2109 return Error("Invalid INSERTVAL record");
2111 SmallVector<unsigned, 4> INSERTVALIdx;
2112 for (unsigned RecSize = Record.size();
2113 OpNum != RecSize; ++OpNum) {
2114 uint64_t Index = Record[OpNum];
2115 if ((unsigned)Index != Index)
2116 return Error("Invalid INSERTVAL index");
2117 INSERTVALIdx.push_back((unsigned)Index);
2120 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
2121 InstructionList.push_back(I);
2125 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2126 // obsolete form of select
2127 // handles select i1 ... in old bitcode
2129 Value *TrueVal, *FalseVal, *Cond;
2130 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2131 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
2132 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
2133 return Error("Invalid SELECT record");
2135 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2136 InstructionList.push_back(I);
2140 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2141 // new form of select
2142 // handles select i1 or select [N x i1]
2144 Value *TrueVal, *FalseVal, *Cond;
2145 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2146 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
2147 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2148 return Error("Invalid SELECT record");
2150 // select condition can be either i1 or [N x i1]
2151 if (VectorType* vector_type =
2152 dyn_cast<VectorType>(Cond->getType())) {
2154 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2155 return Error("Invalid SELECT condition type");
2158 if (Cond->getType() != Type::getInt1Ty(Context))
2159 return Error("Invalid SELECT condition type");
2162 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2163 InstructionList.push_back(I);
2167 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2170 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2171 popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
2172 return Error("Invalid EXTRACTELT record");
2173 I = ExtractElementInst::Create(Vec, Idx);
2174 InstructionList.push_back(I);
2178 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2180 Value *Vec, *Elt, *Idx;
2181 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2182 popValue(Record, OpNum, NextValueNo,
2183 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2184 popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
2185 return Error("Invalid INSERTELT record");
2186 I = InsertElementInst::Create(Vec, Elt, Idx);
2187 InstructionList.push_back(I);
2191 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2193 Value *Vec1, *Vec2, *Mask;
2194 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2195 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
2196 return Error("Invalid SHUFFLEVEC record");
2198 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2199 return Error("Invalid SHUFFLEVEC record");
2200 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2201 InstructionList.push_back(I);
2205 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2206 // Old form of ICmp/FCmp returning bool
2207 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2208 // both legal on vectors but had different behaviour.
2209 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2210 // FCmp/ICmp returning bool or vector of bool
2214 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2215 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
2216 OpNum+1 != Record.size())
2217 return Error("Invalid CMP record");
2219 if (LHS->getType()->isFPOrFPVectorTy())
2220 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2222 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2223 InstructionList.push_back(I);
2227 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2229 unsigned Size = Record.size();
2231 I = ReturnInst::Create(Context);
2232 InstructionList.push_back(I);
2238 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2239 return Error("Invalid RET record");
2240 if (OpNum != Record.size())
2241 return Error("Invalid RET record");
2243 I = ReturnInst::Create(Context, Op);
2244 InstructionList.push_back(I);
2247 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2248 if (Record.size() != 1 && Record.size() != 3)
2249 return Error("Invalid BR record");
2250 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2252 return Error("Invalid BR record");
2254 if (Record.size() == 1) {
2255 I = BranchInst::Create(TrueDest);
2256 InstructionList.push_back(I);
2259 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2260 Value *Cond = getValue(Record, 2, NextValueNo,
2261 Type::getInt1Ty(Context));
2262 if (FalseDest == 0 || Cond == 0)
2263 return Error("Invalid BR record");
2264 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2265 InstructionList.push_back(I);
2269 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2271 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
2272 // New SwitchInst format with case ranges.
2274 Type *OpTy = getTypeByID(Record[1]);
2275 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
2277 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
2278 BasicBlock *Default = getBasicBlock(Record[3]);
2279 if (OpTy == 0 || Cond == 0 || Default == 0)
2280 return Error("Invalid SWITCH record");
2282 unsigned NumCases = Record[4];
2284 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2285 InstructionList.push_back(SI);
2287 unsigned CurIdx = 5;
2288 for (unsigned i = 0; i != NumCases; ++i) {
2289 IntegersSubsetToBB CaseBuilder;
2290 unsigned NumItems = Record[CurIdx++];
2291 for (unsigned ci = 0; ci != NumItems; ++ci) {
2292 bool isSingleNumber = Record[CurIdx++];
2295 unsigned ActiveWords = 1;
2296 if (ValueBitWidth > 64)
2297 ActiveWords = Record[CurIdx++];
2298 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2300 CurIdx += ActiveWords;
2302 if (!isSingleNumber) {
2304 if (ValueBitWidth > 64)
2305 ActiveWords = Record[CurIdx++];
2307 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2310 CaseBuilder.add(IntItem::fromType(OpTy, Low),
2311 IntItem::fromType(OpTy, High));
2312 CurIdx += ActiveWords;
2314 CaseBuilder.add(IntItem::fromType(OpTy, Low));
2316 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
2317 IntegersSubset Case = CaseBuilder.getCase();
2318 SI->addCase(Case, DestBB);
2320 uint16_t Hash = SI->hash();
2321 if (Hash != (Record[0] & 0xFFFF))
2322 return Error("Invalid SWITCH record");
2327 // Old SwitchInst format without case ranges.
2329 if (Record.size() < 3 || (Record.size() & 1) == 0)
2330 return Error("Invalid SWITCH record");
2331 Type *OpTy = getTypeByID(Record[0]);
2332 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
2333 BasicBlock *Default = getBasicBlock(Record[2]);
2334 if (OpTy == 0 || Cond == 0 || Default == 0)
2335 return Error("Invalid SWITCH record");
2336 unsigned NumCases = (Record.size()-3)/2;
2337 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2338 InstructionList.push_back(SI);
2339 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2340 ConstantInt *CaseVal =
2341 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2342 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2343 if (CaseVal == 0 || DestBB == 0) {
2345 return Error("Invalid SWITCH record!");
2347 SI->addCase(CaseVal, DestBB);
2352 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2353 if (Record.size() < 2)
2354 return Error("Invalid INDIRECTBR record");
2355 Type *OpTy = getTypeByID(Record[0]);
2356 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
2357 if (OpTy == 0 || Address == 0)
2358 return Error("Invalid INDIRECTBR record");
2359 unsigned NumDests = Record.size()-2;
2360 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2361 InstructionList.push_back(IBI);
2362 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2363 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2364 IBI->addDestination(DestBB);
2367 return Error("Invalid INDIRECTBR record!");
2374 case bitc::FUNC_CODE_INST_INVOKE: {
2375 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2376 if (Record.size() < 4) return Error("Invalid INVOKE record");
2377 AttributeSet PAL = getAttributes(Record[0]);
2378 unsigned CCInfo = Record[1];
2379 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2380 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2384 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2385 return Error("Invalid INVOKE record");
2387 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2388 FunctionType *FTy = !CalleeTy ? 0 :
2389 dyn_cast<FunctionType>(CalleeTy->getElementType());
2391 // Check that the right number of fixed parameters are here.
2392 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2393 Record.size() < OpNum+FTy->getNumParams())
2394 return Error("Invalid INVOKE record");
2396 SmallVector<Value*, 16> Ops;
2397 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2398 Ops.push_back(getValue(Record, OpNum, NextValueNo,
2399 FTy->getParamType(i)));
2400 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2403 if (!FTy->isVarArg()) {
2404 if (Record.size() != OpNum)
2405 return Error("Invalid INVOKE record");
2407 // Read type/value pairs for varargs params.
2408 while (OpNum != Record.size()) {
2410 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2411 return Error("Invalid INVOKE record");
2416 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
2417 InstructionList.push_back(I);
2418 cast<InvokeInst>(I)->setCallingConv(
2419 static_cast<CallingConv::ID>(CCInfo));
2420 cast<InvokeInst>(I)->setAttributes(PAL);
2423 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
2426 if (getValueTypePair(Record, Idx, NextValueNo, Val))
2427 return Error("Invalid RESUME record");
2428 I = ResumeInst::Create(Val);
2429 InstructionList.push_back(I);
2432 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2433 I = new UnreachableInst(Context);
2434 InstructionList.push_back(I);
2436 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2437 if (Record.size() < 1 || ((Record.size()-1)&1))
2438 return Error("Invalid PHI record");
2439 Type *Ty = getTypeByID(Record[0]);
2440 if (!Ty) return Error("Invalid PHI record");
2442 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2443 InstructionList.push_back(PN);
2445 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2447 // With the new function encoding, it is possible that operands have
2448 // negative IDs (for forward references). Use a signed VBR
2449 // representation to keep the encoding small.
2451 V = getValueSigned(Record, 1+i, NextValueNo, Ty);
2453 V = getValue(Record, 1+i, NextValueNo, Ty);
2454 BasicBlock *BB = getBasicBlock(Record[2+i]);
2455 if (!V || !BB) return Error("Invalid PHI record");
2456 PN->addIncoming(V, BB);
2462 case bitc::FUNC_CODE_INST_LANDINGPAD: {
2463 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
2465 if (Record.size() < 4)
2466 return Error("Invalid LANDINGPAD record");
2467 Type *Ty = getTypeByID(Record[Idx++]);
2468 if (!Ty) return Error("Invalid LANDINGPAD record");
2470 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
2471 return Error("Invalid LANDINGPAD record");
2473 bool IsCleanup = !!Record[Idx++];
2474 unsigned NumClauses = Record[Idx++];
2475 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
2476 LP->setCleanup(IsCleanup);
2477 for (unsigned J = 0; J != NumClauses; ++J) {
2478 LandingPadInst::ClauseType CT =
2479 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
2482 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
2484 return Error("Invalid LANDINGPAD record");
2487 assert((CT != LandingPadInst::Catch ||
2488 !isa<ArrayType>(Val->getType())) &&
2489 "Catch clause has a invalid type!");
2490 assert((CT != LandingPadInst::Filter ||
2491 isa<ArrayType>(Val->getType())) &&
2492 "Filter clause has invalid type!");
2497 InstructionList.push_back(I);
2501 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2502 if (Record.size() != 4)
2503 return Error("Invalid ALLOCA record");
2505 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2506 Type *OpTy = getTypeByID(Record[1]);
2507 Value *Size = getFnValueByID(Record[2], OpTy);
2508 unsigned Align = Record[3];
2509 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2510 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2511 InstructionList.push_back(I);
2514 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2517 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2518 OpNum+2 != Record.size())
2519 return Error("Invalid LOAD record");
2521 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2522 InstructionList.push_back(I);
2525 case bitc::FUNC_CODE_INST_LOADATOMIC: {
2526 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
2529 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2530 OpNum+4 != Record.size())
2531 return Error("Invalid LOADATOMIC record");
2534 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2535 if (Ordering == NotAtomic || Ordering == Release ||
2536 Ordering == AcquireRelease)
2537 return Error("Invalid LOADATOMIC record");
2538 if (Ordering != NotAtomic && Record[OpNum] == 0)
2539 return Error("Invalid LOADATOMIC record");
2540 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2542 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2543 Ordering, SynchScope);
2544 InstructionList.push_back(I);
2547 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
2550 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2551 popValue(Record, OpNum, NextValueNo,
2552 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2553 OpNum+2 != Record.size())
2554 return Error("Invalid STORE record");
2556 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2557 InstructionList.push_back(I);
2560 case bitc::FUNC_CODE_INST_STOREATOMIC: {
2561 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
2564 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2565 popValue(Record, OpNum, NextValueNo,
2566 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2567 OpNum+4 != Record.size())
2568 return Error("Invalid STOREATOMIC record");
2570 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2571 if (Ordering == NotAtomic || Ordering == Acquire ||
2572 Ordering == AcquireRelease)
2573 return Error("Invalid STOREATOMIC record");
2574 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2575 if (Ordering != NotAtomic && Record[OpNum] == 0)
2576 return Error("Invalid STOREATOMIC record");
2578 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2579 Ordering, SynchScope);
2580 InstructionList.push_back(I);
2583 case bitc::FUNC_CODE_INST_CMPXCHG: {
2584 // CMPXCHG:[ptrty, ptr, cmp, new, vol, ordering, synchscope]
2586 Value *Ptr, *Cmp, *New;
2587 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2588 popValue(Record, OpNum, NextValueNo,
2589 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
2590 popValue(Record, OpNum, NextValueNo,
2591 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
2592 OpNum+3 != Record.size())
2593 return Error("Invalid CMPXCHG record");
2594 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+1]);
2595 if (Ordering == NotAtomic || Ordering == Unordered)
2596 return Error("Invalid CMPXCHG record");
2597 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
2598 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, SynchScope);
2599 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
2600 InstructionList.push_back(I);
2603 case bitc::FUNC_CODE_INST_ATOMICRMW: {
2604 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
2607 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2608 popValue(Record, OpNum, NextValueNo,
2609 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2610 OpNum+4 != Record.size())
2611 return Error("Invalid ATOMICRMW record");
2612 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
2613 if (Operation < AtomicRMWInst::FIRST_BINOP ||
2614 Operation > AtomicRMWInst::LAST_BINOP)
2615 return Error("Invalid ATOMICRMW record");
2616 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2617 if (Ordering == NotAtomic || Ordering == Unordered)
2618 return Error("Invalid ATOMICRMW record");
2619 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2620 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
2621 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
2622 InstructionList.push_back(I);
2625 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
2626 if (2 != Record.size())
2627 return Error("Invalid FENCE record");
2628 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
2629 if (Ordering == NotAtomic || Ordering == Unordered ||
2630 Ordering == Monotonic)
2631 return Error("Invalid FENCE record");
2632 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
2633 I = new FenceInst(Context, Ordering, SynchScope);
2634 InstructionList.push_back(I);
2637 case bitc::FUNC_CODE_INST_CALL: {
2638 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2639 if (Record.size() < 3)
2640 return Error("Invalid CALL record");
2642 AttributeSet PAL = getAttributes(Record[0]);
2643 unsigned CCInfo = Record[1];
2647 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2648 return Error("Invalid CALL record");
2650 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2651 FunctionType *FTy = 0;
2652 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2653 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2654 return Error("Invalid CALL record");
2656 SmallVector<Value*, 16> Args;
2657 // Read the fixed params.
2658 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2659 if (FTy->getParamType(i)->isLabelTy())
2660 Args.push_back(getBasicBlock(Record[OpNum]));
2662 Args.push_back(getValue(Record, OpNum, NextValueNo,
2663 FTy->getParamType(i)));
2664 if (Args.back() == 0) return Error("Invalid CALL record");
2667 // Read type/value pairs for varargs params.
2668 if (!FTy->isVarArg()) {
2669 if (OpNum != Record.size())
2670 return Error("Invalid CALL record");
2672 while (OpNum != Record.size()) {
2674 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2675 return Error("Invalid CALL record");
2680 I = CallInst::Create(Callee, Args);
2681 InstructionList.push_back(I);
2682 cast<CallInst>(I)->setCallingConv(
2683 static_cast<CallingConv::ID>(CCInfo>>1));
2684 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2685 cast<CallInst>(I)->setAttributes(PAL);
2688 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2689 if (Record.size() < 3)
2690 return Error("Invalid VAARG record");
2691 Type *OpTy = getTypeByID(Record[0]);
2692 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
2693 Type *ResTy = getTypeByID(Record[2]);
2694 if (!OpTy || !Op || !ResTy)
2695 return Error("Invalid VAARG record");
2696 I = new VAArgInst(Op, ResTy);
2697 InstructionList.push_back(I);
2702 // Add instruction to end of current BB. If there is no current BB, reject
2706 return Error("Invalid instruction with no BB");
2708 CurBB->getInstList().push_back(I);
2710 // If this was a terminator instruction, move to the next block.
2711 if (isa<TerminatorInst>(I)) {
2713 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2716 // Non-void values get registered in the value table for future use.
2717 if (I && !I->getType()->isVoidTy())
2718 ValueList.AssignValue(I, NextValueNo++);
2723 // Check the function list for unresolved values.
2724 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2725 if (A->getParent() == 0) {
2726 // We found at least one unresolved value. Nuke them all to avoid leaks.
2727 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2728 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2729 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2733 return Error("Never resolved value found in function!");
2737 // FIXME: Check for unresolved forward-declared metadata references
2738 // and clean up leaks.
2740 // See if anything took the address of blocks in this function. If so,
2741 // resolve them now.
2742 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2743 BlockAddrFwdRefs.find(F);
2744 if (BAFRI != BlockAddrFwdRefs.end()) {
2745 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2746 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2747 unsigned BlockIdx = RefList[i].first;
2748 if (BlockIdx >= FunctionBBs.size())
2749 return Error("Invalid blockaddress block #");
2751 GlobalVariable *FwdRef = RefList[i].second;
2752 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2753 FwdRef->eraseFromParent();
2756 BlockAddrFwdRefs.erase(BAFRI);
2759 // Trim the value list down to the size it was before we parsed this function.
2760 ValueList.shrinkTo(ModuleValueListSize);
2761 MDValueList.shrinkTo(ModuleMDValueListSize);
2762 std::vector<BasicBlock*>().swap(FunctionBBs);
2766 /// FindFunctionInStream - Find the function body in the bitcode stream
2767 bool BitcodeReader::FindFunctionInStream(Function *F,
2768 DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator) {
2769 while (DeferredFunctionInfoIterator->second == 0) {
2770 if (Stream.AtEndOfStream())
2771 return Error("Could not find Function in stream");
2772 // ParseModule will parse the next body in the stream and set its
2773 // position in the DeferredFunctionInfo map.
2774 if (ParseModule(true)) return true;
2779 //===----------------------------------------------------------------------===//
2780 // GVMaterializer implementation
2781 //===----------------------------------------------------------------------===//
2784 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2785 if (const Function *F = dyn_cast<Function>(GV)) {
2786 return F->isDeclaration() &&
2787 DeferredFunctionInfo.count(const_cast<Function*>(F));
2792 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2793 Function *F = dyn_cast<Function>(GV);
2794 // If it's not a function or is already material, ignore the request.
2795 if (!F || !F->isMaterializable()) return false;
2797 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2798 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2799 // If its position is recorded as 0, its body is somewhere in the stream
2800 // but we haven't seen it yet.
2801 if (DFII->second == 0)
2802 if (LazyStreamer && FindFunctionInStream(F, DFII)) return true;
2804 // Move the bit stream to the saved position of the deferred function body.
2805 Stream.JumpToBit(DFII->second);
2807 if (ParseFunctionBody(F)) {
2808 if (ErrInfo) *ErrInfo = ErrorString;
2812 // Upgrade any old intrinsic calls in the function.
2813 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2814 E = UpgradedIntrinsics.end(); I != E; ++I) {
2815 if (I->first != I->second) {
2816 for (Value::use_iterator UI = I->first->use_begin(),
2817 UE = I->first->use_end(); UI != UE; ) {
2818 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2819 UpgradeIntrinsicCall(CI, I->second);
2827 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2828 const Function *F = dyn_cast<Function>(GV);
2829 if (!F || F->isDeclaration())
2831 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2834 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2835 Function *F = dyn_cast<Function>(GV);
2836 // If this function isn't dematerializable, this is a noop.
2837 if (!F || !isDematerializable(F))
2840 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2842 // Just forget the function body, we can remat it later.
2847 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2848 assert(M == TheModule &&
2849 "Can only Materialize the Module this BitcodeReader is attached to.");
2850 // Iterate over the module, deserializing any functions that are still on
2852 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2854 if (F->isMaterializable() &&
2855 Materialize(F, ErrInfo))
2858 // At this point, if there are any function bodies, the current bit is
2859 // pointing to the END_BLOCK record after them. Now make sure the rest
2860 // of the bits in the module have been read.
2864 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2865 // delete the old functions to clean up. We can't do this unless the entire
2866 // module is materialized because there could always be another function body
2867 // with calls to the old function.
2868 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2869 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2870 if (I->first != I->second) {
2871 for (Value::use_iterator UI = I->first->use_begin(),
2872 UE = I->first->use_end(); UI != UE; ) {
2873 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2874 UpgradeIntrinsicCall(CI, I->second);
2876 if (!I->first->use_empty())
2877 I->first->replaceAllUsesWith(I->second);
2878 I->first->eraseFromParent();
2881 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2886 bool BitcodeReader::InitStream() {
2887 if (LazyStreamer) return InitLazyStream();
2888 return InitStreamFromBuffer();
2891 bool BitcodeReader::InitStreamFromBuffer() {
2892 const unsigned char *BufPtr = (const unsigned char*)Buffer->getBufferStart();
2893 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
2895 if (Buffer->getBufferSize() & 3) {
2896 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
2897 return Error("Invalid bitcode signature");
2899 return Error("Bitcode stream should be a multiple of 4 bytes in length");
2902 // If we have a wrapper header, parse it and ignore the non-bc file contents.
2903 // The magic number is 0x0B17C0DE stored in little endian.
2904 if (isBitcodeWrapper(BufPtr, BufEnd))
2905 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
2906 return Error("Invalid bitcode wrapper header");
2908 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
2909 Stream.init(*StreamFile);
2914 bool BitcodeReader::InitLazyStream() {
2915 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
2917 StreamingMemoryObject *Bytes = new StreamingMemoryObject(LazyStreamer);
2918 StreamFile.reset(new BitstreamReader(Bytes));
2919 Stream.init(*StreamFile);
2921 unsigned char buf[16];
2922 if (Bytes->readBytes(0, 16, buf, NULL) == -1)
2923 return Error("Bitcode stream must be at least 16 bytes in length");
2925 if (!isBitcode(buf, buf + 16))
2926 return Error("Invalid bitcode signature");
2928 if (isBitcodeWrapper(buf, buf + 4)) {
2929 const unsigned char *bitcodeStart = buf;
2930 const unsigned char *bitcodeEnd = buf + 16;
2931 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
2932 Bytes->dropLeadingBytes(bitcodeStart - buf);
2933 Bytes->setKnownObjectSize(bitcodeEnd - bitcodeStart);
2938 //===----------------------------------------------------------------------===//
2939 // External interface
2940 //===----------------------------------------------------------------------===//
2942 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2944 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2945 LLVMContext& Context,
2946 std::string *ErrMsg) {
2947 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2948 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2949 M->setMaterializer(R);
2950 if (R->ParseBitcodeInto(M)) {
2952 *ErrMsg = R->getErrorString();
2954 delete M; // Also deletes R.
2957 // Have the BitcodeReader dtor delete 'Buffer'.
2958 R->setBufferOwned(true);
2960 R->materializeForwardReferencedFunctions();
2966 Module *llvm::getStreamedBitcodeModule(const std::string &name,
2967 DataStreamer *streamer,
2968 LLVMContext &Context,
2969 std::string *ErrMsg) {
2970 Module *M = new Module(name, Context);
2971 BitcodeReader *R = new BitcodeReader(streamer, Context);
2972 M->setMaterializer(R);
2973 if (R->ParseBitcodeInto(M)) {
2975 *ErrMsg = R->getErrorString();
2976 delete M; // Also deletes R.
2979 R->setBufferOwned(false); // no buffer to delete
2983 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2984 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2985 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2986 std::string *ErrMsg){
2987 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2990 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2991 // there was an error.
2992 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2994 // Read in the entire module, and destroy the BitcodeReader.
2995 if (M->MaterializeAllPermanently(ErrMsg)) {
3000 // TODO: Restore the use-lists to the in-memory state when the bitcode was
3001 // written. We must defer until the Module has been fully materialized.
3006 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
3007 LLVMContext& Context,
3008 std::string *ErrMsg) {
3009 BitcodeReader *R = new BitcodeReader(Buffer, Context);
3010 // Don't let the BitcodeReader dtor delete 'Buffer'.
3011 R->setBufferOwned(false);
3013 std::string Triple("");
3014 if (R->ParseTriple(Triple))
3016 *ErrMsg = R->getErrorString();