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 // This header defines the BitcodeReader class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Bitcode/ReaderWriter.h"
15 #include "BitcodeReader.h"
16 #include "llvm/Constants.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/InlineAsm.h"
19 #include "llvm/IntrinsicInst.h"
20 #include "llvm/Module.h"
21 #include "llvm/Operator.h"
22 #include "llvm/AutoUpgrade.h"
23 #include "llvm/ADT/SmallString.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/Support/DataStream.h"
26 #include "llvm/Support/MathExtras.h"
27 #include "llvm/Support/MemoryBuffer.h"
28 #include "llvm/OperandTraits.h"
32 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
35 void BitcodeReader::materializeForwardReferencedFunctions() {
36 while (!BlockAddrFwdRefs.empty()) {
37 Function *F = BlockAddrFwdRefs.begin()->first;
42 void BitcodeReader::FreeState() {
46 std::vector<Type*>().swap(TypeList);
50 std::vector<AttrListPtr>().swap(MAttributes);
51 std::vector<BasicBlock*>().swap(FunctionBBs);
52 std::vector<Function*>().swap(FunctionsWithBodies);
53 DeferredFunctionInfo.clear();
57 //===----------------------------------------------------------------------===//
58 // Helper functions to implement forward reference resolution, etc.
59 //===----------------------------------------------------------------------===//
61 /// ConvertToString - Convert a string from a record into an std::string, return
63 template<typename StrTy>
64 static bool ConvertToString(ArrayRef<uint64_t> Record, unsigned Idx,
66 if (Idx > Record.size())
69 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
70 Result += (char)Record[i];
74 static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
76 default: // Map unknown/new linkages to external
77 case 0: return GlobalValue::ExternalLinkage;
78 case 1: return GlobalValue::WeakAnyLinkage;
79 case 2: return GlobalValue::AppendingLinkage;
80 case 3: return GlobalValue::InternalLinkage;
81 case 4: return GlobalValue::LinkOnceAnyLinkage;
82 case 5: return GlobalValue::DLLImportLinkage;
83 case 6: return GlobalValue::DLLExportLinkage;
84 case 7: return GlobalValue::ExternalWeakLinkage;
85 case 8: return GlobalValue::CommonLinkage;
86 case 9: return GlobalValue::PrivateLinkage;
87 case 10: return GlobalValue::WeakODRLinkage;
88 case 11: return GlobalValue::LinkOnceODRLinkage;
89 case 12: return GlobalValue::AvailableExternallyLinkage;
90 case 13: return GlobalValue::LinkerPrivateLinkage;
91 case 14: return GlobalValue::LinkerPrivateWeakLinkage;
92 case 15: return GlobalValue::LinkerPrivateWeakDefAutoLinkage;
96 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
98 default: // Map unknown visibilities to default.
99 case 0: return GlobalValue::DefaultVisibility;
100 case 1: return GlobalValue::HiddenVisibility;
101 case 2: return GlobalValue::ProtectedVisibility;
105 static int GetDecodedCastOpcode(unsigned Val) {
108 case bitc::CAST_TRUNC : return Instruction::Trunc;
109 case bitc::CAST_ZEXT : return Instruction::ZExt;
110 case bitc::CAST_SEXT : return Instruction::SExt;
111 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
112 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
113 case bitc::CAST_UITOFP : return Instruction::UIToFP;
114 case bitc::CAST_SITOFP : return Instruction::SIToFP;
115 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
116 case bitc::CAST_FPEXT : return Instruction::FPExt;
117 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
118 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
119 case bitc::CAST_BITCAST : return Instruction::BitCast;
122 static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
125 case bitc::BINOP_ADD:
126 return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
127 case bitc::BINOP_SUB:
128 return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
129 case bitc::BINOP_MUL:
130 return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
131 case bitc::BINOP_UDIV: return Instruction::UDiv;
132 case bitc::BINOP_SDIV:
133 return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
134 case bitc::BINOP_UREM: return Instruction::URem;
135 case bitc::BINOP_SREM:
136 return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
137 case bitc::BINOP_SHL: return Instruction::Shl;
138 case bitc::BINOP_LSHR: return Instruction::LShr;
139 case bitc::BINOP_ASHR: return Instruction::AShr;
140 case bitc::BINOP_AND: return Instruction::And;
141 case bitc::BINOP_OR: return Instruction::Or;
142 case bitc::BINOP_XOR: return Instruction::Xor;
146 static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
148 default: return AtomicRMWInst::BAD_BINOP;
149 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
150 case bitc::RMW_ADD: return AtomicRMWInst::Add;
151 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
152 case bitc::RMW_AND: return AtomicRMWInst::And;
153 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
154 case bitc::RMW_OR: return AtomicRMWInst::Or;
155 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
156 case bitc::RMW_MAX: return AtomicRMWInst::Max;
157 case bitc::RMW_MIN: return AtomicRMWInst::Min;
158 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
159 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
163 static AtomicOrdering GetDecodedOrdering(unsigned Val) {
165 case bitc::ORDERING_NOTATOMIC: return NotAtomic;
166 case bitc::ORDERING_UNORDERED: return Unordered;
167 case bitc::ORDERING_MONOTONIC: return Monotonic;
168 case bitc::ORDERING_ACQUIRE: return Acquire;
169 case bitc::ORDERING_RELEASE: return Release;
170 case bitc::ORDERING_ACQREL: return AcquireRelease;
171 default: // Map unknown orderings to sequentially-consistent.
172 case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
176 static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
178 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
179 default: // Map unknown scopes to cross-thread.
180 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
186 /// @brief A class for maintaining the slot number definition
187 /// as a placeholder for the actual definition for forward constants defs.
188 class ConstantPlaceHolder : public ConstantExpr {
189 void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
191 // allocate space for exactly one operand
192 void *operator new(size_t s) {
193 return User::operator new(s, 1);
195 explicit ConstantPlaceHolder(Type *Ty, LLVMContext& Context)
196 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
197 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
200 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
201 //static inline bool classof(const ConstantPlaceHolder *) { return true; }
202 static bool classof(const Value *V) {
203 return isa<ConstantExpr>(V) &&
204 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
208 /// Provide fast operand accessors
209 //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
213 // FIXME: can we inherit this from ConstantExpr?
215 struct OperandTraits<ConstantPlaceHolder> :
216 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
221 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
230 WeakVH &OldV = ValuePtrs[Idx];
236 // Handle constants and non-constants (e.g. instrs) differently for
238 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
239 ResolveConstants.push_back(std::make_pair(PHC, Idx));
242 // If there was a forward reference to this value, replace it.
243 Value *PrevVal = OldV;
244 OldV->replaceAllUsesWith(V);
250 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
255 if (Value *V = ValuePtrs[Idx]) {
256 assert(Ty == V->getType() && "Type mismatch in constant table!");
257 return cast<Constant>(V);
260 // Create and return a placeholder, which will later be RAUW'd.
261 Constant *C = new ConstantPlaceHolder(Ty, Context);
266 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, Type *Ty) {
270 if (Value *V = ValuePtrs[Idx]) {
271 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
275 // No type specified, must be invalid reference.
276 if (Ty == 0) return 0;
278 // Create and return a placeholder, which will later be RAUW'd.
279 Value *V = new Argument(Ty);
284 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
285 /// resolves any forward references. The idea behind this is that we sometimes
286 /// get constants (such as large arrays) which reference *many* forward ref
287 /// constants. Replacing each of these causes a lot of thrashing when
288 /// building/reuniquing the constant. Instead of doing this, we look at all the
289 /// uses and rewrite all the place holders at once for any constant that uses
291 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
292 // Sort the values by-pointer so that they are efficient to look up with a
294 std::sort(ResolveConstants.begin(), ResolveConstants.end());
296 SmallVector<Constant*, 64> NewOps;
298 while (!ResolveConstants.empty()) {
299 Value *RealVal = operator[](ResolveConstants.back().second);
300 Constant *Placeholder = ResolveConstants.back().first;
301 ResolveConstants.pop_back();
303 // Loop over all users of the placeholder, updating them to reference the
304 // new value. If they reference more than one placeholder, update them all
306 while (!Placeholder->use_empty()) {
307 Value::use_iterator UI = Placeholder->use_begin();
310 // If the using object isn't uniqued, just update the operands. This
311 // handles instructions and initializers for global variables.
312 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
313 UI.getUse().set(RealVal);
317 // Otherwise, we have a constant that uses the placeholder. Replace that
318 // constant with a new constant that has *all* placeholder uses updated.
319 Constant *UserC = cast<Constant>(U);
320 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
323 if (!isa<ConstantPlaceHolder>(*I)) {
324 // Not a placeholder reference.
326 } else if (*I == Placeholder) {
327 // Common case is that it just references this one placeholder.
330 // Otherwise, look up the placeholder in ResolveConstants.
331 ResolveConstantsTy::iterator It =
332 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
333 std::pair<Constant*, unsigned>(cast<Constant>(*I),
335 assert(It != ResolveConstants.end() && It->first == *I);
336 NewOp = operator[](It->second);
339 NewOps.push_back(cast<Constant>(NewOp));
342 // Make the new constant.
344 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
345 NewC = ConstantArray::get(UserCA->getType(), NewOps);
346 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
347 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
348 } else if (isa<ConstantVector>(UserC)) {
349 NewC = ConstantVector::get(NewOps);
351 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
352 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
355 UserC->replaceAllUsesWith(NewC);
356 UserC->destroyConstant();
360 // Update all ValueHandles, they should be the only users at this point.
361 Placeholder->replaceAllUsesWith(RealVal);
366 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
375 WeakVH &OldV = MDValuePtrs[Idx];
381 // If there was a forward reference to this value, replace it.
382 MDNode *PrevVal = cast<MDNode>(OldV);
383 OldV->replaceAllUsesWith(V);
384 MDNode::deleteTemporary(PrevVal);
385 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
387 MDValuePtrs[Idx] = V;
390 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
394 if (Value *V = MDValuePtrs[Idx]) {
395 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
399 // Create and return a placeholder, which will later be RAUW'd.
400 Value *V = MDNode::getTemporary(Context, ArrayRef<Value*>());
401 MDValuePtrs[Idx] = V;
405 Type *BitcodeReader::getTypeByID(unsigned ID) {
406 // The type table size is always specified correctly.
407 if (ID >= TypeList.size())
410 if (Type *Ty = TypeList[ID])
413 // If we have a forward reference, the only possible case is when it is to a
414 // named struct. Just create a placeholder for now.
415 return TypeList[ID] = StructType::create(Context);
419 //===----------------------------------------------------------------------===//
420 // Functions for parsing blocks from the bitcode file
421 //===----------------------------------------------------------------------===//
423 bool BitcodeReader::ParseAttributeBlock() {
424 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
425 return Error("Malformed block record");
427 if (!MAttributes.empty())
428 return Error("Multiple PARAMATTR blocks found!");
430 SmallVector<uint64_t, 64> Record;
432 SmallVector<AttributeWithIndex, 8> Attrs;
434 // Read all the records.
436 unsigned Code = Stream.ReadCode();
437 if (Code == bitc::END_BLOCK) {
438 if (Stream.ReadBlockEnd())
439 return Error("Error at end of PARAMATTR block");
443 if (Code == bitc::ENTER_SUBBLOCK) {
444 // No known subblocks, always skip them.
445 Stream.ReadSubBlockID();
446 if (Stream.SkipBlock())
447 return Error("Malformed block record");
451 if (Code == bitc::DEFINE_ABBREV) {
452 Stream.ReadAbbrevRecord();
458 switch (Stream.ReadRecord(Code, Record)) {
459 default: // Default behavior: ignore.
461 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
462 if (Record.size() & 1)
463 return Error("Invalid ENTRY record");
465 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
466 Attributes ReconstitutedAttr =
467 Attribute::decodeLLVMAttributesForBitcode(Record[i+1]);
468 Record[i+1] = ReconstitutedAttr.Raw();
471 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
472 if (Attributes(Record[i+1]) != Attribute::None)
473 Attrs.push_back(AttributeWithIndex::get(Record[i],
474 Attributes(Record[i+1])));
477 MAttributes.push_back(AttrListPtr::get(Attrs));
485 bool BitcodeReader::ParseTypeTable() {
486 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
487 return Error("Malformed block record");
489 return ParseTypeTableBody();
492 bool BitcodeReader::ParseTypeTableBody() {
493 if (!TypeList.empty())
494 return Error("Multiple TYPE_BLOCKs found!");
496 SmallVector<uint64_t, 64> Record;
497 unsigned NumRecords = 0;
499 SmallString<64> TypeName;
501 // Read all the records for this type table.
503 unsigned Code = Stream.ReadCode();
504 if (Code == bitc::END_BLOCK) {
505 if (NumRecords != TypeList.size())
506 return Error("Invalid type forward reference in TYPE_BLOCK");
507 if (Stream.ReadBlockEnd())
508 return Error("Error at end of type table block");
512 if (Code == bitc::ENTER_SUBBLOCK) {
513 // No known subblocks, always skip them.
514 Stream.ReadSubBlockID();
515 if (Stream.SkipBlock())
516 return Error("Malformed block record");
520 if (Code == bitc::DEFINE_ABBREV) {
521 Stream.ReadAbbrevRecord();
528 switch (Stream.ReadRecord(Code, Record)) {
529 default: return Error("unknown type in type table");
530 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
531 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
532 // type list. This allows us to reserve space.
533 if (Record.size() < 1)
534 return Error("Invalid TYPE_CODE_NUMENTRY record");
535 TypeList.resize(Record[0]);
537 case bitc::TYPE_CODE_VOID: // VOID
538 ResultTy = Type::getVoidTy(Context);
540 case bitc::TYPE_CODE_HALF: // HALF
541 ResultTy = Type::getHalfTy(Context);
543 case bitc::TYPE_CODE_FLOAT: // FLOAT
544 ResultTy = Type::getFloatTy(Context);
546 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
547 ResultTy = Type::getDoubleTy(Context);
549 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
550 ResultTy = Type::getX86_FP80Ty(Context);
552 case bitc::TYPE_CODE_FP128: // FP128
553 ResultTy = Type::getFP128Ty(Context);
555 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
556 ResultTy = Type::getPPC_FP128Ty(Context);
558 case bitc::TYPE_CODE_LABEL: // LABEL
559 ResultTy = Type::getLabelTy(Context);
561 case bitc::TYPE_CODE_METADATA: // METADATA
562 ResultTy = Type::getMetadataTy(Context);
564 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
565 ResultTy = Type::getX86_MMXTy(Context);
567 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
568 if (Record.size() < 1)
569 return Error("Invalid Integer type record");
571 ResultTy = IntegerType::get(Context, Record[0]);
573 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
574 // [pointee type, address space]
575 if (Record.size() < 1)
576 return Error("Invalid POINTER type record");
577 unsigned AddressSpace = 0;
578 if (Record.size() == 2)
579 AddressSpace = Record[1];
580 ResultTy = getTypeByID(Record[0]);
581 if (ResultTy == 0) return Error("invalid element type in pointer type");
582 ResultTy = PointerType::get(ResultTy, AddressSpace);
585 case bitc::TYPE_CODE_FUNCTION_OLD: {
586 // FIXME: attrid is dead, remove it in LLVM 4.0
587 // FUNCTION: [vararg, attrid, retty, paramty x N]
588 if (Record.size() < 3)
589 return Error("Invalid FUNCTION type record");
590 SmallVector<Type*, 8> ArgTys;
591 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
592 if (Type *T = getTypeByID(Record[i]))
598 ResultTy = getTypeByID(Record[2]);
599 if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
600 return Error("invalid type in function type");
602 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
605 case bitc::TYPE_CODE_FUNCTION: {
606 // FUNCTION: [vararg, retty, paramty x N]
607 if (Record.size() < 2)
608 return Error("Invalid FUNCTION type record");
609 SmallVector<Type*, 8> ArgTys;
610 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
611 if (Type *T = getTypeByID(Record[i]))
617 ResultTy = getTypeByID(Record[1]);
618 if (ResultTy == 0 || ArgTys.size() < Record.size()-2)
619 return Error("invalid type in function type");
621 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
624 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
625 if (Record.size() < 1)
626 return Error("Invalid STRUCT type record");
627 SmallVector<Type*, 8> EltTys;
628 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
629 if (Type *T = getTypeByID(Record[i]))
634 if (EltTys.size() != Record.size()-1)
635 return Error("invalid type in struct type");
636 ResultTy = StructType::get(Context, EltTys, Record[0]);
639 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
640 if (ConvertToString(Record, 0, TypeName))
641 return Error("Invalid STRUCT_NAME record");
644 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
645 if (Record.size() < 1)
646 return Error("Invalid STRUCT type record");
648 if (NumRecords >= TypeList.size())
649 return Error("invalid TYPE table");
651 // Check to see if this was forward referenced, if so fill in the temp.
652 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
654 Res->setName(TypeName);
655 TypeList[NumRecords] = 0;
656 } else // Otherwise, create a new struct.
657 Res = StructType::create(Context, TypeName);
660 SmallVector<Type*, 8> EltTys;
661 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
662 if (Type *T = getTypeByID(Record[i]))
667 if (EltTys.size() != Record.size()-1)
668 return Error("invalid STRUCT type record");
669 Res->setBody(EltTys, Record[0]);
673 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
674 if (Record.size() != 1)
675 return Error("Invalid OPAQUE type record");
677 if (NumRecords >= TypeList.size())
678 return Error("invalid TYPE table");
680 // Check to see if this was forward referenced, if so fill in the temp.
681 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
683 Res->setName(TypeName);
684 TypeList[NumRecords] = 0;
685 } else // Otherwise, create a new struct with no body.
686 Res = StructType::create(Context, TypeName);
691 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
692 if (Record.size() < 2)
693 return Error("Invalid ARRAY type record");
694 if ((ResultTy = getTypeByID(Record[1])))
695 ResultTy = ArrayType::get(ResultTy, Record[0]);
697 return Error("Invalid ARRAY type element");
699 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
700 if (Record.size() < 2)
701 return Error("Invalid VECTOR type record");
702 if ((ResultTy = getTypeByID(Record[1])))
703 ResultTy = VectorType::get(ResultTy, Record[0]);
705 return Error("Invalid ARRAY type element");
709 if (NumRecords >= TypeList.size())
710 return Error("invalid TYPE table");
711 assert(ResultTy && "Didn't read a type?");
712 assert(TypeList[NumRecords] == 0 && "Already read type?");
713 TypeList[NumRecords++] = ResultTy;
717 bool BitcodeReader::ParseValueSymbolTable() {
718 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
719 return Error("Malformed block record");
721 SmallVector<uint64_t, 64> Record;
723 // Read all the records for this value table.
724 SmallString<128> ValueName;
726 unsigned Code = Stream.ReadCode();
727 if (Code == bitc::END_BLOCK) {
728 if (Stream.ReadBlockEnd())
729 return Error("Error at end of value symbol table block");
732 if (Code == bitc::ENTER_SUBBLOCK) {
733 // No known subblocks, always skip them.
734 Stream.ReadSubBlockID();
735 if (Stream.SkipBlock())
736 return Error("Malformed block record");
740 if (Code == bitc::DEFINE_ABBREV) {
741 Stream.ReadAbbrevRecord();
747 switch (Stream.ReadRecord(Code, Record)) {
748 default: // Default behavior: unknown type.
750 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
751 if (ConvertToString(Record, 1, ValueName))
752 return Error("Invalid VST_ENTRY record");
753 unsigned ValueID = Record[0];
754 if (ValueID >= ValueList.size())
755 return Error("Invalid Value ID in VST_ENTRY record");
756 Value *V = ValueList[ValueID];
758 V->setName(StringRef(ValueName.data(), ValueName.size()));
762 case bitc::VST_CODE_BBENTRY: {
763 if (ConvertToString(Record, 1, ValueName))
764 return Error("Invalid VST_BBENTRY record");
765 BasicBlock *BB = getBasicBlock(Record[0]);
767 return Error("Invalid BB ID in VST_BBENTRY record");
769 BB->setName(StringRef(ValueName.data(), ValueName.size()));
777 bool BitcodeReader::ParseMetadata() {
778 unsigned NextMDValueNo = MDValueList.size();
780 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
781 return Error("Malformed block record");
783 SmallVector<uint64_t, 64> Record;
785 // Read all the records.
787 unsigned Code = Stream.ReadCode();
788 if (Code == bitc::END_BLOCK) {
789 if (Stream.ReadBlockEnd())
790 return Error("Error at end of PARAMATTR block");
794 if (Code == bitc::ENTER_SUBBLOCK) {
795 // No known subblocks, always skip them.
796 Stream.ReadSubBlockID();
797 if (Stream.SkipBlock())
798 return Error("Malformed block record");
802 if (Code == bitc::DEFINE_ABBREV) {
803 Stream.ReadAbbrevRecord();
807 bool IsFunctionLocal = false;
810 Code = Stream.ReadRecord(Code, Record);
812 default: // Default behavior: ignore.
814 case bitc::METADATA_NAME: {
815 // Read named of the named metadata.
816 SmallString<8> Name(Record.begin(), Record.end());
818 Code = Stream.ReadCode();
820 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
821 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
822 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
824 // Read named metadata elements.
825 unsigned Size = Record.size();
826 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
827 for (unsigned i = 0; i != Size; ++i) {
828 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
830 return Error("Malformed metadata record");
835 case bitc::METADATA_FN_NODE:
836 IsFunctionLocal = true;
838 case bitc::METADATA_NODE: {
839 if (Record.size() % 2 == 1)
840 return Error("Invalid METADATA_NODE record");
842 unsigned Size = Record.size();
843 SmallVector<Value*, 8> Elts;
844 for (unsigned i = 0; i != Size; i += 2) {
845 Type *Ty = getTypeByID(Record[i]);
846 if (!Ty) return Error("Invalid METADATA_NODE record");
847 if (Ty->isMetadataTy())
848 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
849 else if (!Ty->isVoidTy())
850 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
852 Elts.push_back(NULL);
854 Value *V = MDNode::getWhenValsUnresolved(Context, Elts, IsFunctionLocal);
855 IsFunctionLocal = false;
856 MDValueList.AssignValue(V, NextMDValueNo++);
859 case bitc::METADATA_STRING: {
860 SmallString<8> String(Record.begin(), Record.end());
861 Value *V = MDString::get(Context, String);
862 MDValueList.AssignValue(V, NextMDValueNo++);
865 case bitc::METADATA_KIND: {
866 if (Record.size() < 2)
867 return Error("Invalid METADATA_KIND record");
869 unsigned Kind = Record[0];
870 SmallString<8> Name(Record.begin()+1, Record.end());
872 unsigned NewKind = TheModule->getMDKindID(Name.str());
873 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
874 return Error("Conflicting METADATA_KIND records");
881 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
882 /// the LSB for dense VBR encoding.
883 static uint64_t DecodeSignRotatedValue(uint64_t V) {
888 // There is no such thing as -0 with integers. "-0" really means MININT.
892 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
893 /// values and aliases that we can.
894 bool BitcodeReader::ResolveGlobalAndAliasInits() {
895 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
896 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
898 GlobalInitWorklist.swap(GlobalInits);
899 AliasInitWorklist.swap(AliasInits);
901 while (!GlobalInitWorklist.empty()) {
902 unsigned ValID = GlobalInitWorklist.back().second;
903 if (ValID >= ValueList.size()) {
904 // Not ready to resolve this yet, it requires something later in the file.
905 GlobalInits.push_back(GlobalInitWorklist.back());
907 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
908 GlobalInitWorklist.back().first->setInitializer(C);
910 return Error("Global variable initializer is not a constant!");
912 GlobalInitWorklist.pop_back();
915 while (!AliasInitWorklist.empty()) {
916 unsigned ValID = AliasInitWorklist.back().second;
917 if (ValID >= ValueList.size()) {
918 AliasInits.push_back(AliasInitWorklist.back());
920 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
921 AliasInitWorklist.back().first->setAliasee(C);
923 return Error("Alias initializer is not a constant!");
925 AliasInitWorklist.pop_back();
930 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
931 SmallVector<uint64_t, 8> Words(Vals.size());
932 std::transform(Vals.begin(), Vals.end(), Words.begin(),
933 DecodeSignRotatedValue);
935 return APInt(TypeBits, Words);
938 bool BitcodeReader::ParseConstants() {
939 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
940 return Error("Malformed block record");
942 SmallVector<uint64_t, 64> Record;
944 // Read all the records for this value table.
945 Type *CurTy = Type::getInt32Ty(Context);
946 unsigned NextCstNo = ValueList.size();
948 unsigned Code = Stream.ReadCode();
949 if (Code == bitc::END_BLOCK)
952 if (Code == bitc::ENTER_SUBBLOCK) {
953 // No known subblocks, always skip them.
954 Stream.ReadSubBlockID();
955 if (Stream.SkipBlock())
956 return Error("Malformed block record");
960 if (Code == bitc::DEFINE_ABBREV) {
961 Stream.ReadAbbrevRecord();
968 unsigned BitCode = Stream.ReadRecord(Code, 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(APInt(16, (uint16_t)Record[0])));
1004 else if (CurTy->isFloatTy())
1005 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1006 else if (CurTy->isDoubleTy())
1007 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1008 else if (CurTy->isX86_FP80Ty()) {
1009 // Bits are not stored the same way as a normal i80 APInt, compensate.
1010 uint64_t Rearrange[2];
1011 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1012 Rearrange[1] = Record[0] >> 48;
1013 V = ConstantFP::get(Context, APFloat(APInt(80, Rearrange)));
1014 } else if (CurTy->isFP128Ty())
1015 V = ConstantFP::get(Context, APFloat(APInt(128, Record), true));
1016 else if (CurTy->isPPC_FP128Ty())
1017 V = ConstantFP::get(Context, APFloat(APInt(128, Record)));
1019 V = UndefValue::get(CurTy);
1023 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1025 return Error("Invalid CST_AGGREGATE record");
1027 unsigned Size = Record.size();
1028 SmallVector<Constant*, 16> Elts;
1030 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1031 for (unsigned i = 0; i != Size; ++i)
1032 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1033 STy->getElementType(i)));
1034 V = ConstantStruct::get(STy, Elts);
1035 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1036 Type *EltTy = ATy->getElementType();
1037 for (unsigned i = 0; i != Size; ++i)
1038 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1039 V = ConstantArray::get(ATy, Elts);
1040 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1041 Type *EltTy = VTy->getElementType();
1042 for (unsigned i = 0; i != Size; ++i)
1043 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1044 V = ConstantVector::get(Elts);
1046 V = UndefValue::get(CurTy);
1050 case bitc::CST_CODE_STRING: // STRING: [values]
1051 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1053 return Error("Invalid CST_STRING record");
1055 SmallString<16> Elts(Record.begin(), Record.end());
1056 V = ConstantDataArray::getString(Context, Elts,
1057 BitCode == bitc::CST_CODE_CSTRING);
1060 case bitc::CST_CODE_DATA: {// DATA: [n x value]
1062 return Error("Invalid CST_DATA record");
1064 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
1065 unsigned Size = Record.size();
1067 if (EltTy->isIntegerTy(8)) {
1068 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
1069 if (isa<VectorType>(CurTy))
1070 V = ConstantDataVector::get(Context, Elts);
1072 V = ConstantDataArray::get(Context, Elts);
1073 } else if (EltTy->isIntegerTy(16)) {
1074 SmallVector<uint16_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(32)) {
1080 SmallVector<uint32_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(64)) {
1086 SmallVector<uint64_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->isFloatTy()) {
1092 SmallVector<float, 16> Elts(Size);
1093 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
1094 if (isa<VectorType>(CurTy))
1095 V = ConstantDataVector::get(Context, Elts);
1097 V = ConstantDataArray::get(Context, Elts);
1098 } else if (EltTy->isDoubleTy()) {
1099 SmallVector<double, 16> Elts(Size);
1100 std::transform(Record.begin(), Record.end(), Elts.begin(),
1102 if (isa<VectorType>(CurTy))
1103 V = ConstantDataVector::get(Context, Elts);
1105 V = ConstantDataArray::get(Context, Elts);
1107 return Error("Unknown element type in CE_DATA");
1112 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1113 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1114 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1116 V = UndefValue::get(CurTy); // Unknown binop.
1118 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1119 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1121 if (Record.size() >= 4) {
1122 if (Opc == Instruction::Add ||
1123 Opc == Instruction::Sub ||
1124 Opc == Instruction::Mul ||
1125 Opc == Instruction::Shl) {
1126 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1127 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1128 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1129 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1130 } else if (Opc == Instruction::SDiv ||
1131 Opc == Instruction::UDiv ||
1132 Opc == Instruction::LShr ||
1133 Opc == Instruction::AShr) {
1134 if (Record[3] & (1 << bitc::PEO_EXACT))
1135 Flags |= SDivOperator::IsExact;
1138 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1142 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1143 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1144 int Opc = GetDecodedCastOpcode(Record[0]);
1146 V = UndefValue::get(CurTy); // Unknown cast.
1148 Type *OpTy = getTypeByID(Record[1]);
1149 if (!OpTy) return Error("Invalid CE_CAST record");
1150 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1151 V = ConstantExpr::getCast(Opc, Op, CurTy);
1155 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1156 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1157 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1158 SmallVector<Constant*, 16> Elts;
1159 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1160 Type *ElTy = getTypeByID(Record[i]);
1161 if (!ElTy) return Error("Invalid CE_GEP record");
1162 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1164 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1165 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1167 bitc::CST_CODE_CE_INBOUNDS_GEP);
1170 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1171 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1172 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1173 Type::getInt1Ty(Context)),
1174 ValueList.getConstantFwdRef(Record[1],CurTy),
1175 ValueList.getConstantFwdRef(Record[2],CurTy));
1177 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1178 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1180 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1181 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1182 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1183 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1184 V = ConstantExpr::getExtractElement(Op0, Op1);
1187 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1188 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1189 if (Record.size() < 3 || OpTy == 0)
1190 return Error("Invalid CE_INSERTELT record");
1191 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1192 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1193 OpTy->getElementType());
1194 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1195 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1198 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1199 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1200 if (Record.size() < 3 || OpTy == 0)
1201 return Error("Invalid CE_SHUFFLEVEC record");
1202 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1203 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1204 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1205 OpTy->getNumElements());
1206 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1207 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1210 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1211 VectorType *RTy = dyn_cast<VectorType>(CurTy);
1213 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1214 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1215 return Error("Invalid CE_SHUFVEC_EX record");
1216 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1217 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1218 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1219 RTy->getNumElements());
1220 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1221 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1224 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1225 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1226 Type *OpTy = getTypeByID(Record[0]);
1227 if (OpTy == 0) return Error("Invalid CE_CMP record");
1228 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1229 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1231 if (OpTy->isFPOrFPVectorTy())
1232 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1234 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1237 case bitc::CST_CODE_INLINEASM: {
1238 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1239 std::string AsmStr, ConstrStr;
1240 bool HasSideEffects = Record[0] & 1;
1241 bool IsAlignStack = Record[0] >> 1;
1242 unsigned AsmStrSize = Record[1];
1243 if (2+AsmStrSize >= Record.size())
1244 return Error("Invalid INLINEASM record");
1245 unsigned ConstStrSize = Record[2+AsmStrSize];
1246 if (3+AsmStrSize+ConstStrSize > Record.size())
1247 return Error("Invalid INLINEASM record");
1249 for (unsigned i = 0; i != AsmStrSize; ++i)
1250 AsmStr += (char)Record[2+i];
1251 for (unsigned i = 0; i != ConstStrSize; ++i)
1252 ConstrStr += (char)Record[3+AsmStrSize+i];
1253 PointerType *PTy = cast<PointerType>(CurTy);
1254 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1255 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1258 case bitc::CST_CODE_BLOCKADDRESS:{
1259 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1260 Type *FnTy = getTypeByID(Record[0]);
1261 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1263 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1264 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1266 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1267 Type::getInt8Ty(Context),
1268 false, GlobalValue::InternalLinkage,
1270 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1276 ValueList.AssignValue(V, NextCstNo);
1280 if (NextCstNo != ValueList.size())
1281 return Error("Invalid constant reference!");
1283 if (Stream.ReadBlockEnd())
1284 return Error("Error at end of constants block");
1286 // Once all the constants have been read, go through and resolve forward
1288 ValueList.ResolveConstantForwardRefs();
1292 bool BitcodeReader::ParseUseLists() {
1293 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
1294 return Error("Malformed block record");
1296 SmallVector<uint64_t, 64> Record;
1298 // Read all the records.
1300 unsigned Code = Stream.ReadCode();
1301 if (Code == bitc::END_BLOCK) {
1302 if (Stream.ReadBlockEnd())
1303 return Error("Error at end of use-list table block");
1307 if (Code == bitc::ENTER_SUBBLOCK) {
1308 // No known subblocks, always skip them.
1309 Stream.ReadSubBlockID();
1310 if (Stream.SkipBlock())
1311 return Error("Malformed block record");
1315 if (Code == bitc::DEFINE_ABBREV) {
1316 Stream.ReadAbbrevRecord();
1320 // Read a use list record.
1322 switch (Stream.ReadRecord(Code, Record)) {
1323 default: // Default behavior: unknown type.
1325 case bitc::USELIST_CODE_ENTRY: { // USELIST_CODE_ENTRY: TBD.
1326 unsigned RecordLength = Record.size();
1327 if (RecordLength < 1)
1328 return Error ("Invalid UseList reader!");
1329 UseListRecords.push_back(Record);
1336 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1337 /// remember where it is and then skip it. This lets us lazily deserialize the
1339 bool BitcodeReader::RememberAndSkipFunctionBody() {
1340 // Get the function we are talking about.
1341 if (FunctionsWithBodies.empty())
1342 return Error("Insufficient function protos");
1344 Function *Fn = FunctionsWithBodies.back();
1345 FunctionsWithBodies.pop_back();
1347 // Save the current stream state.
1348 uint64_t CurBit = Stream.GetCurrentBitNo();
1349 DeferredFunctionInfo[Fn] = CurBit;
1351 // Skip over the function block for now.
1352 if (Stream.SkipBlock())
1353 return Error("Malformed block record");
1357 bool BitcodeReader::GlobalCleanup() {
1358 // Patch the initializers for globals and aliases up.
1359 ResolveGlobalAndAliasInits();
1360 if (!GlobalInits.empty() || !AliasInits.empty())
1361 return Error("Malformed global initializer set");
1363 // Look for intrinsic functions which need to be upgraded at some point
1364 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1367 if (UpgradeIntrinsicFunction(FI, NewFn))
1368 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1371 // Look for global variables which need to be renamed.
1372 for (Module::global_iterator
1373 GI = TheModule->global_begin(), GE = TheModule->global_end();
1375 UpgradeGlobalVariable(GI);
1376 // Force deallocation of memory for these vectors to favor the client that
1377 // want lazy deserialization.
1378 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1379 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1383 bool BitcodeReader::ParseModule(bool Resume) {
1385 Stream.JumpToBit(NextUnreadBit);
1386 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1387 return Error("Malformed block record");
1389 SmallVector<uint64_t, 64> Record;
1390 std::vector<std::string> SectionTable;
1391 std::vector<std::string> GCTable;
1393 // Read all the records for this module.
1394 while (!Stream.AtEndOfStream()) {
1395 unsigned Code = Stream.ReadCode();
1396 if (Code == bitc::END_BLOCK) {
1397 if (Stream.ReadBlockEnd())
1398 return Error("Error at end of module block");
1400 return GlobalCleanup();
1403 if (Code == bitc::ENTER_SUBBLOCK) {
1404 switch (Stream.ReadSubBlockID()) {
1405 default: // Skip unknown content.
1406 if (Stream.SkipBlock())
1407 return Error("Malformed block record");
1409 case bitc::BLOCKINFO_BLOCK_ID:
1410 if (Stream.ReadBlockInfoBlock())
1411 return Error("Malformed BlockInfoBlock");
1413 case bitc::PARAMATTR_BLOCK_ID:
1414 if (ParseAttributeBlock())
1417 case bitc::TYPE_BLOCK_ID_NEW:
1418 if (ParseTypeTable())
1421 case bitc::VALUE_SYMTAB_BLOCK_ID:
1422 if (ParseValueSymbolTable())
1424 SeenValueSymbolTable = true;
1426 case bitc::CONSTANTS_BLOCK_ID:
1427 if (ParseConstants() || ResolveGlobalAndAliasInits())
1430 case bitc::METADATA_BLOCK_ID:
1431 if (ParseMetadata())
1434 case bitc::FUNCTION_BLOCK_ID:
1435 // If this is the first function body we've seen, reverse the
1436 // FunctionsWithBodies list.
1437 if (!SeenFirstFunctionBody) {
1438 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1439 if (GlobalCleanup())
1441 SeenFirstFunctionBody = true;
1444 if (RememberAndSkipFunctionBody())
1446 // For streaming bitcode, suspend parsing when we reach the function
1447 // bodies. Subsequent materialization calls will resume it when
1448 // necessary. For streaming, the function bodies must be at the end of
1449 // the bitcode. If the bitcode file is old, the symbol table will be
1450 // at the end instead and will not have been seen yet. In this case,
1451 // just finish the parse now.
1452 if (LazyStreamer && SeenValueSymbolTable) {
1453 NextUnreadBit = Stream.GetCurrentBitNo();
1457 case bitc::USELIST_BLOCK_ID:
1458 if (ParseUseLists())
1465 if (Code == bitc::DEFINE_ABBREV) {
1466 Stream.ReadAbbrevRecord();
1471 switch (Stream.ReadRecord(Code, Record)) {
1472 default: break; // Default behavior, ignore unknown content.
1473 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1474 if (Record.size() < 1)
1475 return Error("Malformed MODULE_CODE_VERSION");
1476 // Only version #0 is supported so far.
1478 return Error("Unknown bitstream version!");
1480 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1482 if (ConvertToString(Record, 0, S))
1483 return Error("Invalid MODULE_CODE_TRIPLE record");
1484 TheModule->setTargetTriple(S);
1487 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1489 if (ConvertToString(Record, 0, S))
1490 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1491 TheModule->setDataLayout(S);
1494 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1496 if (ConvertToString(Record, 0, S))
1497 return Error("Invalid MODULE_CODE_ASM record");
1498 TheModule->setModuleInlineAsm(S);
1501 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1503 if (ConvertToString(Record, 0, S))
1504 return Error("Invalid MODULE_CODE_DEPLIB record");
1505 TheModule->addLibrary(S);
1508 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1510 if (ConvertToString(Record, 0, S))
1511 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1512 SectionTable.push_back(S);
1515 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1517 if (ConvertToString(Record, 0, S))
1518 return Error("Invalid MODULE_CODE_GCNAME record");
1519 GCTable.push_back(S);
1522 // GLOBALVAR: [pointer type, isconst, initid,
1523 // linkage, alignment, section, visibility, threadlocal,
1525 case bitc::MODULE_CODE_GLOBALVAR: {
1526 if (Record.size() < 6)
1527 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1528 Type *Ty = getTypeByID(Record[0]);
1529 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1530 if (!Ty->isPointerTy())
1531 return Error("Global not a pointer type!");
1532 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1533 Ty = cast<PointerType>(Ty)->getElementType();
1535 bool isConstant = Record[1];
1536 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1537 unsigned Alignment = (1 << Record[4]) >> 1;
1538 std::string Section;
1540 if (Record[5]-1 >= SectionTable.size())
1541 return Error("Invalid section ID");
1542 Section = SectionTable[Record[5]-1];
1544 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1545 if (Record.size() > 6)
1546 Visibility = GetDecodedVisibility(Record[6]);
1547 bool isThreadLocal = false;
1548 if (Record.size() > 7)
1549 isThreadLocal = Record[7];
1551 bool UnnamedAddr = false;
1552 if (Record.size() > 8)
1553 UnnamedAddr = Record[8];
1555 GlobalVariable *NewGV =
1556 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1557 isThreadLocal, AddressSpace);
1558 NewGV->setAlignment(Alignment);
1559 if (!Section.empty())
1560 NewGV->setSection(Section);
1561 NewGV->setVisibility(Visibility);
1562 NewGV->setThreadLocal(isThreadLocal);
1563 NewGV->setUnnamedAddr(UnnamedAddr);
1565 ValueList.push_back(NewGV);
1567 // Remember which value to use for the global initializer.
1568 if (unsigned InitID = Record[2])
1569 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1572 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1573 // alignment, section, visibility, gc, unnamed_addr]
1574 case bitc::MODULE_CODE_FUNCTION: {
1575 if (Record.size() < 8)
1576 return Error("Invalid MODULE_CODE_FUNCTION record");
1577 Type *Ty = getTypeByID(Record[0]);
1578 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1579 if (!Ty->isPointerTy())
1580 return Error("Function not a pointer type!");
1582 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1584 return Error("Function not a pointer to function type!");
1586 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1589 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1590 bool isProto = Record[2];
1591 Func->setLinkage(GetDecodedLinkage(Record[3]));
1592 Func->setAttributes(getAttributes(Record[4]));
1594 Func->setAlignment((1 << Record[5]) >> 1);
1596 if (Record[6]-1 >= SectionTable.size())
1597 return Error("Invalid section ID");
1598 Func->setSection(SectionTable[Record[6]-1]);
1600 Func->setVisibility(GetDecodedVisibility(Record[7]));
1601 if (Record.size() > 8 && Record[8]) {
1602 if (Record[8]-1 > GCTable.size())
1603 return Error("Invalid GC ID");
1604 Func->setGC(GCTable[Record[8]-1].c_str());
1606 bool UnnamedAddr = false;
1607 if (Record.size() > 9)
1608 UnnamedAddr = Record[9];
1609 Func->setUnnamedAddr(UnnamedAddr);
1610 ValueList.push_back(Func);
1612 // If this is a function with a body, remember the prototype we are
1613 // creating now, so that we can match up the body with them later.
1615 FunctionsWithBodies.push_back(Func);
1616 if (LazyStreamer) DeferredFunctionInfo[Func] = 0;
1620 // ALIAS: [alias type, aliasee val#, linkage]
1621 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1622 case bitc::MODULE_CODE_ALIAS: {
1623 if (Record.size() < 3)
1624 return Error("Invalid MODULE_ALIAS record");
1625 Type *Ty = getTypeByID(Record[0]);
1626 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1627 if (!Ty->isPointerTy())
1628 return Error("Function not a pointer type!");
1630 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1632 // Old bitcode files didn't have visibility field.
1633 if (Record.size() > 3)
1634 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1635 ValueList.push_back(NewGA);
1636 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1639 /// MODULE_CODE_PURGEVALS: [numvals]
1640 case bitc::MODULE_CODE_PURGEVALS:
1641 // Trim down the value list to the specified size.
1642 if (Record.size() < 1 || Record[0] > ValueList.size())
1643 return Error("Invalid MODULE_PURGEVALS record");
1644 ValueList.shrinkTo(Record[0]);
1650 return Error("Premature end of bitstream");
1653 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1656 if (InitStream()) return true;
1658 // Sniff for the signature.
1659 if (Stream.Read(8) != 'B' ||
1660 Stream.Read(8) != 'C' ||
1661 Stream.Read(4) != 0x0 ||
1662 Stream.Read(4) != 0xC ||
1663 Stream.Read(4) != 0xE ||
1664 Stream.Read(4) != 0xD)
1665 return Error("Invalid bitcode signature");
1667 // We expect a number of well-defined blocks, though we don't necessarily
1668 // need to understand them all.
1669 while (!Stream.AtEndOfStream()) {
1670 unsigned Code = Stream.ReadCode();
1672 if (Code != bitc::ENTER_SUBBLOCK) {
1674 // The ranlib in xcode 4 will align archive members by appending newlines
1675 // to the end of them. If this file size is a multiple of 4 but not 8, we
1676 // have to read and ignore these final 4 bytes :-(
1677 if (Stream.GetAbbrevIDWidth() == 2 && Code == 2 &&
1678 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1679 Stream.AtEndOfStream())
1682 return Error("Invalid record at top-level");
1685 unsigned BlockID = Stream.ReadSubBlockID();
1687 // We only know the MODULE subblock ID.
1689 case bitc::BLOCKINFO_BLOCK_ID:
1690 if (Stream.ReadBlockInfoBlock())
1691 return Error("Malformed BlockInfoBlock");
1693 case bitc::MODULE_BLOCK_ID:
1694 // Reject multiple MODULE_BLOCK's in a single bitstream.
1696 return Error("Multiple MODULE_BLOCKs in same stream");
1698 if (ParseModule(false))
1700 if (LazyStreamer) return false;
1703 if (Stream.SkipBlock())
1704 return Error("Malformed block record");
1712 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1713 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1714 return Error("Malformed block record");
1716 SmallVector<uint64_t, 64> Record;
1718 // Read all the records for this module.
1719 while (!Stream.AtEndOfStream()) {
1720 unsigned Code = Stream.ReadCode();
1721 if (Code == bitc::END_BLOCK) {
1722 if (Stream.ReadBlockEnd())
1723 return Error("Error at end of module block");
1728 if (Code == bitc::ENTER_SUBBLOCK) {
1729 switch (Stream.ReadSubBlockID()) {
1730 default: // Skip unknown content.
1731 if (Stream.SkipBlock())
1732 return Error("Malformed block record");
1738 if (Code == bitc::DEFINE_ABBREV) {
1739 Stream.ReadAbbrevRecord();
1744 switch (Stream.ReadRecord(Code, Record)) {
1745 default: break; // Default behavior, ignore unknown content.
1746 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1747 if (Record.size() < 1)
1748 return Error("Malformed MODULE_CODE_VERSION");
1749 // Only version #0 is supported so far.
1751 return Error("Unknown bitstream version!");
1753 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1755 if (ConvertToString(Record, 0, S))
1756 return Error("Invalid MODULE_CODE_TRIPLE record");
1764 return Error("Premature end of bitstream");
1767 bool BitcodeReader::ParseTriple(std::string &Triple) {
1768 if (InitStream()) return true;
1770 // Sniff for the signature.
1771 if (Stream.Read(8) != 'B' ||
1772 Stream.Read(8) != 'C' ||
1773 Stream.Read(4) != 0x0 ||
1774 Stream.Read(4) != 0xC ||
1775 Stream.Read(4) != 0xE ||
1776 Stream.Read(4) != 0xD)
1777 return Error("Invalid bitcode signature");
1779 // We expect a number of well-defined blocks, though we don't necessarily
1780 // need to understand them all.
1781 while (!Stream.AtEndOfStream()) {
1782 unsigned Code = Stream.ReadCode();
1784 if (Code != bitc::ENTER_SUBBLOCK)
1785 return Error("Invalid record at top-level");
1787 unsigned BlockID = Stream.ReadSubBlockID();
1789 // We only know the MODULE subblock ID.
1791 case bitc::MODULE_BLOCK_ID:
1792 if (ParseModuleTriple(Triple))
1796 if (Stream.SkipBlock())
1797 return Error("Malformed block record");
1805 /// ParseMetadataAttachment - Parse metadata attachments.
1806 bool BitcodeReader::ParseMetadataAttachment() {
1807 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1808 return Error("Malformed block record");
1810 SmallVector<uint64_t, 64> Record;
1812 unsigned Code = Stream.ReadCode();
1813 if (Code == bitc::END_BLOCK) {
1814 if (Stream.ReadBlockEnd())
1815 return Error("Error at end of PARAMATTR block");
1818 if (Code == bitc::DEFINE_ABBREV) {
1819 Stream.ReadAbbrevRecord();
1822 // Read a metadata attachment record.
1824 switch (Stream.ReadRecord(Code, Record)) {
1825 default: // Default behavior: ignore.
1827 case bitc::METADATA_ATTACHMENT: {
1828 unsigned RecordLength = Record.size();
1829 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1830 return Error ("Invalid METADATA_ATTACHMENT reader!");
1831 Instruction *Inst = InstructionList[Record[0]];
1832 for (unsigned i = 1; i != RecordLength; i = i+2) {
1833 unsigned Kind = Record[i];
1834 DenseMap<unsigned, unsigned>::iterator I =
1835 MDKindMap.find(Kind);
1836 if (I == MDKindMap.end())
1837 return Error("Invalid metadata kind ID");
1838 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1839 Inst->setMetadata(I->second, cast<MDNode>(Node));
1848 /// ParseFunctionBody - Lazily parse the specified function body block.
1849 bool BitcodeReader::ParseFunctionBody(Function *F) {
1850 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1851 return Error("Malformed block record");
1853 InstructionList.clear();
1854 unsigned ModuleValueListSize = ValueList.size();
1855 unsigned ModuleMDValueListSize = MDValueList.size();
1857 // Add all the function arguments to the value table.
1858 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1859 ValueList.push_back(I);
1861 unsigned NextValueNo = ValueList.size();
1862 BasicBlock *CurBB = 0;
1863 unsigned CurBBNo = 0;
1867 // Read all the records.
1868 SmallVector<uint64_t, 64> Record;
1870 unsigned Code = Stream.ReadCode();
1871 if (Code == bitc::END_BLOCK) {
1872 if (Stream.ReadBlockEnd())
1873 return Error("Error at end of function block");
1877 if (Code == bitc::ENTER_SUBBLOCK) {
1878 switch (Stream.ReadSubBlockID()) {
1879 default: // Skip unknown content.
1880 if (Stream.SkipBlock())
1881 return Error("Malformed block record");
1883 case bitc::CONSTANTS_BLOCK_ID:
1884 if (ParseConstants()) return true;
1885 NextValueNo = ValueList.size();
1887 case bitc::VALUE_SYMTAB_BLOCK_ID:
1888 if (ParseValueSymbolTable()) return true;
1890 case bitc::METADATA_ATTACHMENT_ID:
1891 if (ParseMetadataAttachment()) return true;
1893 case bitc::METADATA_BLOCK_ID:
1894 if (ParseMetadata()) return true;
1900 if (Code == bitc::DEFINE_ABBREV) {
1901 Stream.ReadAbbrevRecord();
1908 unsigned BitCode = Stream.ReadRecord(Code, Record);
1910 default: // Default behavior: reject
1911 return Error("Unknown instruction");
1912 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1913 if (Record.size() < 1 || Record[0] == 0)
1914 return Error("Invalid DECLAREBLOCKS record");
1915 // Create all the basic blocks for the function.
1916 FunctionBBs.resize(Record[0]);
1917 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1918 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1919 CurBB = FunctionBBs[0];
1922 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1923 // This record indicates that the last instruction is at the same
1924 // location as the previous instruction with a location.
1927 // Get the last instruction emitted.
1928 if (CurBB && !CurBB->empty())
1930 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1931 !FunctionBBs[CurBBNo-1]->empty())
1932 I = &FunctionBBs[CurBBNo-1]->back();
1934 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1935 I->setDebugLoc(LastLoc);
1939 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
1940 I = 0; // Get the last instruction emitted.
1941 if (CurBB && !CurBB->empty())
1943 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1944 !FunctionBBs[CurBBNo-1]->empty())
1945 I = &FunctionBBs[CurBBNo-1]->back();
1946 if (I == 0 || Record.size() < 4)
1947 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
1949 unsigned Line = Record[0], Col = Record[1];
1950 unsigned ScopeID = Record[2], IAID = Record[3];
1952 MDNode *Scope = 0, *IA = 0;
1953 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
1954 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
1955 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
1956 I->setDebugLoc(LastLoc);
1961 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1964 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1965 getValue(Record, OpNum, LHS->getType(), RHS) ||
1966 OpNum+1 > Record.size())
1967 return Error("Invalid BINOP record");
1969 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
1970 if (Opc == -1) return Error("Invalid BINOP record");
1971 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
1972 InstructionList.push_back(I);
1973 if (OpNum < Record.size()) {
1974 if (Opc == Instruction::Add ||
1975 Opc == Instruction::Sub ||
1976 Opc == Instruction::Mul ||
1977 Opc == Instruction::Shl) {
1978 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1979 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
1980 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1981 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
1982 } else if (Opc == Instruction::SDiv ||
1983 Opc == Instruction::UDiv ||
1984 Opc == Instruction::LShr ||
1985 Opc == Instruction::AShr) {
1986 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
1987 cast<BinaryOperator>(I)->setIsExact(true);
1992 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
1995 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1996 OpNum+2 != Record.size())
1997 return Error("Invalid CAST record");
1999 Type *ResTy = getTypeByID(Record[OpNum]);
2000 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
2001 if (Opc == -1 || ResTy == 0)
2002 return Error("Invalid CAST record");
2003 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
2004 InstructionList.push_back(I);
2007 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
2008 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
2011 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
2012 return Error("Invalid GEP record");
2014 SmallVector<Value*, 16> GEPIdx;
2015 while (OpNum != Record.size()) {
2017 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2018 return Error("Invalid GEP record");
2019 GEPIdx.push_back(Op);
2022 I = GetElementPtrInst::Create(BasePtr, GEPIdx);
2023 InstructionList.push_back(I);
2024 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
2025 cast<GetElementPtrInst>(I)->setIsInBounds(true);
2029 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
2030 // EXTRACTVAL: [opty, opval, n x indices]
2033 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2034 return Error("Invalid EXTRACTVAL record");
2036 SmallVector<unsigned, 4> EXTRACTVALIdx;
2037 for (unsigned RecSize = Record.size();
2038 OpNum != RecSize; ++OpNum) {
2039 uint64_t Index = Record[OpNum];
2040 if ((unsigned)Index != Index)
2041 return Error("Invalid EXTRACTVAL index");
2042 EXTRACTVALIdx.push_back((unsigned)Index);
2045 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
2046 InstructionList.push_back(I);
2050 case bitc::FUNC_CODE_INST_INSERTVAL: {
2051 // INSERTVAL: [opty, opval, opty, opval, n x indices]
2054 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2055 return Error("Invalid INSERTVAL record");
2057 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
2058 return Error("Invalid INSERTVAL record");
2060 SmallVector<unsigned, 4> INSERTVALIdx;
2061 for (unsigned RecSize = Record.size();
2062 OpNum != RecSize; ++OpNum) {
2063 uint64_t Index = Record[OpNum];
2064 if ((unsigned)Index != Index)
2065 return Error("Invalid INSERTVAL index");
2066 INSERTVALIdx.push_back((unsigned)Index);
2069 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
2070 InstructionList.push_back(I);
2074 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2075 // obsolete form of select
2076 // handles select i1 ... in old bitcode
2078 Value *TrueVal, *FalseVal, *Cond;
2079 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2080 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2081 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
2082 return Error("Invalid SELECT record");
2084 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2085 InstructionList.push_back(I);
2089 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2090 // new form of select
2091 // handles select i1 or select [N x i1]
2093 Value *TrueVal, *FalseVal, *Cond;
2094 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2095 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2096 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2097 return Error("Invalid SELECT record");
2099 // select condition can be either i1 or [N x i1]
2100 if (VectorType* vector_type =
2101 dyn_cast<VectorType>(Cond->getType())) {
2103 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2104 return Error("Invalid SELECT condition type");
2107 if (Cond->getType() != Type::getInt1Ty(Context))
2108 return Error("Invalid SELECT condition type");
2111 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2112 InstructionList.push_back(I);
2116 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2119 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2120 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2121 return Error("Invalid EXTRACTELT record");
2122 I = ExtractElementInst::Create(Vec, Idx);
2123 InstructionList.push_back(I);
2127 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2129 Value *Vec, *Elt, *Idx;
2130 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2131 getValue(Record, OpNum,
2132 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2133 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2134 return Error("Invalid INSERTELT record");
2135 I = InsertElementInst::Create(Vec, Elt, Idx);
2136 InstructionList.push_back(I);
2140 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2142 Value *Vec1, *Vec2, *Mask;
2143 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2144 getValue(Record, OpNum, Vec1->getType(), Vec2))
2145 return Error("Invalid SHUFFLEVEC record");
2147 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2148 return Error("Invalid SHUFFLEVEC record");
2149 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2150 InstructionList.push_back(I);
2154 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2155 // Old form of ICmp/FCmp returning bool
2156 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2157 // both legal on vectors but had different behaviour.
2158 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2159 // FCmp/ICmp returning bool or vector of bool
2163 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2164 getValue(Record, OpNum, LHS->getType(), RHS) ||
2165 OpNum+1 != Record.size())
2166 return Error("Invalid CMP record");
2168 if (LHS->getType()->isFPOrFPVectorTy())
2169 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2171 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2172 InstructionList.push_back(I);
2176 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2178 unsigned Size = Record.size();
2180 I = ReturnInst::Create(Context);
2181 InstructionList.push_back(I);
2187 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2188 return Error("Invalid RET record");
2189 if (OpNum != Record.size())
2190 return Error("Invalid RET record");
2192 I = ReturnInst::Create(Context, Op);
2193 InstructionList.push_back(I);
2196 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2197 if (Record.size() != 1 && Record.size() != 3)
2198 return Error("Invalid BR record");
2199 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2201 return Error("Invalid BR record");
2203 if (Record.size() == 1) {
2204 I = BranchInst::Create(TrueDest);
2205 InstructionList.push_back(I);
2208 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2209 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
2210 if (FalseDest == 0 || Cond == 0)
2211 return Error("Invalid BR record");
2212 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2213 InstructionList.push_back(I);
2217 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2219 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
2220 // New SwitchInst format with case ranges.
2222 Type *OpTy = getTypeByID(Record[1]);
2223 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
2225 Value *Cond = getFnValueByID(Record[2], OpTy);
2226 BasicBlock *Default = getBasicBlock(Record[3]);
2227 if (OpTy == 0 || Cond == 0 || Default == 0)
2228 return Error("Invalid SWITCH record");
2230 unsigned NumCases = Record[4];
2232 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2233 InstructionList.push_back(SI);
2235 unsigned CurIdx = 5;
2236 for (unsigned i = 0; i != NumCases; ++i) {
2237 IntegersSubsetToBB CaseBuilder;
2238 unsigned NumItems = Record[CurIdx++];
2239 for (unsigned ci = 0; ci != NumItems; ++ci) {
2240 bool isSingleNumber = Record[CurIdx++];
2243 unsigned ActiveWords = 1;
2244 if (ValueBitWidth > 64)
2245 ActiveWords = Record[CurIdx++];
2246 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2248 CurIdx += ActiveWords;
2250 if (!isSingleNumber) {
2252 if (ValueBitWidth > 64)
2253 ActiveWords = Record[CurIdx++];
2255 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2258 CaseBuilder.add(IntItem::fromType(OpTy, Low),
2259 IntItem::fromType(OpTy, High));
2260 CurIdx += ActiveWords;
2262 CaseBuilder.add(IntItem::fromType(OpTy, Low));
2264 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
2265 IntegersSubset Case = CaseBuilder.getCase();
2266 SI->addCase(Case, DestBB);
2268 uint16_t Hash = SI->hash();
2269 if (Hash != (Record[0] & 0xFFFF))
2270 return Error("Invalid SWITCH record");
2275 // Old SwitchInst format without case ranges.
2277 if (Record.size() < 3 || (Record.size() & 1) == 0)
2278 return Error("Invalid SWITCH record");
2279 Type *OpTy = getTypeByID(Record[0]);
2280 Value *Cond = getFnValueByID(Record[1], OpTy);
2281 BasicBlock *Default = getBasicBlock(Record[2]);
2282 if (OpTy == 0 || Cond == 0 || Default == 0)
2283 return Error("Invalid SWITCH record");
2284 unsigned NumCases = (Record.size()-3)/2;
2285 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2286 InstructionList.push_back(SI);
2287 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2288 ConstantInt *CaseVal =
2289 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2290 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2291 if (CaseVal == 0 || DestBB == 0) {
2293 return Error("Invalid SWITCH record!");
2295 SI->addCase(CaseVal, DestBB);
2300 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2301 if (Record.size() < 2)
2302 return Error("Invalid INDIRECTBR record");
2303 Type *OpTy = getTypeByID(Record[0]);
2304 Value *Address = getFnValueByID(Record[1], OpTy);
2305 if (OpTy == 0 || Address == 0)
2306 return Error("Invalid INDIRECTBR record");
2307 unsigned NumDests = Record.size()-2;
2308 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2309 InstructionList.push_back(IBI);
2310 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2311 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2312 IBI->addDestination(DestBB);
2315 return Error("Invalid INDIRECTBR record!");
2322 case bitc::FUNC_CODE_INST_INVOKE: {
2323 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2324 if (Record.size() < 4) return Error("Invalid INVOKE record");
2325 AttrListPtr PAL = getAttributes(Record[0]);
2326 unsigned CCInfo = Record[1];
2327 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2328 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2332 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2333 return Error("Invalid INVOKE record");
2335 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2336 FunctionType *FTy = !CalleeTy ? 0 :
2337 dyn_cast<FunctionType>(CalleeTy->getElementType());
2339 // Check that the right number of fixed parameters are here.
2340 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2341 Record.size() < OpNum+FTy->getNumParams())
2342 return Error("Invalid INVOKE record");
2344 SmallVector<Value*, 16> Ops;
2345 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2346 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2347 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2350 if (!FTy->isVarArg()) {
2351 if (Record.size() != OpNum)
2352 return Error("Invalid INVOKE record");
2354 // Read type/value pairs for varargs params.
2355 while (OpNum != Record.size()) {
2357 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2358 return Error("Invalid INVOKE record");
2363 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
2364 InstructionList.push_back(I);
2365 cast<InvokeInst>(I)->setCallingConv(
2366 static_cast<CallingConv::ID>(CCInfo));
2367 cast<InvokeInst>(I)->setAttributes(PAL);
2370 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
2373 if (getValueTypePair(Record, Idx, NextValueNo, Val))
2374 return Error("Invalid RESUME record");
2375 I = ResumeInst::Create(Val);
2376 InstructionList.push_back(I);
2379 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2380 I = new UnreachableInst(Context);
2381 InstructionList.push_back(I);
2383 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2384 if (Record.size() < 1 || ((Record.size()-1)&1))
2385 return Error("Invalid PHI record");
2386 Type *Ty = getTypeByID(Record[0]);
2387 if (!Ty) return Error("Invalid PHI record");
2389 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2390 InstructionList.push_back(PN);
2392 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2393 Value *V = getFnValueByID(Record[1+i], Ty);
2394 BasicBlock *BB = getBasicBlock(Record[2+i]);
2395 if (!V || !BB) return Error("Invalid PHI record");
2396 PN->addIncoming(V, BB);
2402 case bitc::FUNC_CODE_INST_LANDINGPAD: {
2403 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
2405 if (Record.size() < 4)
2406 return Error("Invalid LANDINGPAD record");
2407 Type *Ty = getTypeByID(Record[Idx++]);
2408 if (!Ty) return Error("Invalid LANDINGPAD record");
2410 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
2411 return Error("Invalid LANDINGPAD record");
2413 bool IsCleanup = !!Record[Idx++];
2414 unsigned NumClauses = Record[Idx++];
2415 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
2416 LP->setCleanup(IsCleanup);
2417 for (unsigned J = 0; J != NumClauses; ++J) {
2418 LandingPadInst::ClauseType CT =
2419 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
2422 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
2424 return Error("Invalid LANDINGPAD record");
2427 assert((CT != LandingPadInst::Catch ||
2428 !isa<ArrayType>(Val->getType())) &&
2429 "Catch clause has a invalid type!");
2430 assert((CT != LandingPadInst::Filter ||
2431 isa<ArrayType>(Val->getType())) &&
2432 "Filter clause has invalid type!");
2437 InstructionList.push_back(I);
2441 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2442 if (Record.size() != 4)
2443 return Error("Invalid ALLOCA record");
2445 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2446 Type *OpTy = getTypeByID(Record[1]);
2447 Value *Size = getFnValueByID(Record[2], OpTy);
2448 unsigned Align = Record[3];
2449 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2450 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2451 InstructionList.push_back(I);
2454 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2457 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2458 OpNum+2 != Record.size())
2459 return Error("Invalid LOAD record");
2461 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2462 InstructionList.push_back(I);
2465 case bitc::FUNC_CODE_INST_LOADATOMIC: {
2466 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
2469 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2470 OpNum+4 != Record.size())
2471 return Error("Invalid LOADATOMIC record");
2474 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2475 if (Ordering == NotAtomic || Ordering == Release ||
2476 Ordering == AcquireRelease)
2477 return Error("Invalid LOADATOMIC record");
2478 if (Ordering != NotAtomic && Record[OpNum] == 0)
2479 return Error("Invalid LOADATOMIC record");
2480 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2482 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2483 Ordering, SynchScope);
2484 InstructionList.push_back(I);
2487 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
2490 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2491 getValue(Record, OpNum,
2492 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2493 OpNum+2 != Record.size())
2494 return Error("Invalid STORE record");
2496 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2497 InstructionList.push_back(I);
2500 case bitc::FUNC_CODE_INST_STOREATOMIC: {
2501 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
2504 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2505 getValue(Record, OpNum,
2506 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2507 OpNum+4 != Record.size())
2508 return Error("Invalid STOREATOMIC record");
2510 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2511 if (Ordering == NotAtomic || Ordering == Acquire ||
2512 Ordering == AcquireRelease)
2513 return Error("Invalid STOREATOMIC record");
2514 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2515 if (Ordering != NotAtomic && Record[OpNum] == 0)
2516 return Error("Invalid STOREATOMIC record");
2518 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2519 Ordering, SynchScope);
2520 InstructionList.push_back(I);
2523 case bitc::FUNC_CODE_INST_CMPXCHG: {
2524 // CMPXCHG:[ptrty, ptr, cmp, new, vol, ordering, synchscope]
2526 Value *Ptr, *Cmp, *New;
2527 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2528 getValue(Record, OpNum,
2529 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
2530 getValue(Record, OpNum,
2531 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
2532 OpNum+3 != Record.size())
2533 return Error("Invalid CMPXCHG record");
2534 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+1]);
2535 if (Ordering == NotAtomic || Ordering == Unordered)
2536 return Error("Invalid CMPXCHG record");
2537 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
2538 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, SynchScope);
2539 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
2540 InstructionList.push_back(I);
2543 case bitc::FUNC_CODE_INST_ATOMICRMW: {
2544 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
2547 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2548 getValue(Record, OpNum,
2549 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2550 OpNum+4 != Record.size())
2551 return Error("Invalid ATOMICRMW record");
2552 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
2553 if (Operation < AtomicRMWInst::FIRST_BINOP ||
2554 Operation > AtomicRMWInst::LAST_BINOP)
2555 return Error("Invalid ATOMICRMW record");
2556 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2557 if (Ordering == NotAtomic || Ordering == Unordered)
2558 return Error("Invalid ATOMICRMW record");
2559 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2560 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
2561 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
2562 InstructionList.push_back(I);
2565 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
2566 if (2 != Record.size())
2567 return Error("Invalid FENCE record");
2568 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
2569 if (Ordering == NotAtomic || Ordering == Unordered ||
2570 Ordering == Monotonic)
2571 return Error("Invalid FENCE record");
2572 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
2573 I = new FenceInst(Context, Ordering, SynchScope);
2574 InstructionList.push_back(I);
2577 case bitc::FUNC_CODE_INST_CALL: {
2578 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2579 if (Record.size() < 3)
2580 return Error("Invalid CALL record");
2582 AttrListPtr PAL = getAttributes(Record[0]);
2583 unsigned CCInfo = Record[1];
2587 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2588 return Error("Invalid CALL record");
2590 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2591 FunctionType *FTy = 0;
2592 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2593 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2594 return Error("Invalid CALL record");
2596 SmallVector<Value*, 16> Args;
2597 // Read the fixed params.
2598 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2599 if (FTy->getParamType(i)->isLabelTy())
2600 Args.push_back(getBasicBlock(Record[OpNum]));
2602 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2603 if (Args.back() == 0) return Error("Invalid CALL record");
2606 // Read type/value pairs for varargs params.
2607 if (!FTy->isVarArg()) {
2608 if (OpNum != Record.size())
2609 return Error("Invalid CALL record");
2611 while (OpNum != Record.size()) {
2613 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2614 return Error("Invalid CALL record");
2619 I = CallInst::Create(Callee, Args);
2620 InstructionList.push_back(I);
2621 cast<CallInst>(I)->setCallingConv(
2622 static_cast<CallingConv::ID>(CCInfo>>1));
2623 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2624 cast<CallInst>(I)->setAttributes(PAL);
2627 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2628 if (Record.size() < 3)
2629 return Error("Invalid VAARG record");
2630 Type *OpTy = getTypeByID(Record[0]);
2631 Value *Op = getFnValueByID(Record[1], OpTy);
2632 Type *ResTy = getTypeByID(Record[2]);
2633 if (!OpTy || !Op || !ResTy)
2634 return Error("Invalid VAARG record");
2635 I = new VAArgInst(Op, ResTy);
2636 InstructionList.push_back(I);
2641 // Add instruction to end of current BB. If there is no current BB, reject
2645 return Error("Invalid instruction with no BB");
2647 CurBB->getInstList().push_back(I);
2649 // If this was a terminator instruction, move to the next block.
2650 if (isa<TerminatorInst>(I)) {
2652 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2655 // Non-void values get registered in the value table for future use.
2656 if (I && !I->getType()->isVoidTy())
2657 ValueList.AssignValue(I, NextValueNo++);
2660 // Check the function list for unresolved values.
2661 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2662 if (A->getParent() == 0) {
2663 // We found at least one unresolved value. Nuke them all to avoid leaks.
2664 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2665 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2666 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2670 return Error("Never resolved value found in function!");
2674 // FIXME: Check for unresolved forward-declared metadata references
2675 // and clean up leaks.
2677 // See if anything took the address of blocks in this function. If so,
2678 // resolve them now.
2679 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2680 BlockAddrFwdRefs.find(F);
2681 if (BAFRI != BlockAddrFwdRefs.end()) {
2682 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2683 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2684 unsigned BlockIdx = RefList[i].first;
2685 if (BlockIdx >= FunctionBBs.size())
2686 return Error("Invalid blockaddress block #");
2688 GlobalVariable *FwdRef = RefList[i].second;
2689 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2690 FwdRef->eraseFromParent();
2693 BlockAddrFwdRefs.erase(BAFRI);
2696 // Trim the value list down to the size it was before we parsed this function.
2697 ValueList.shrinkTo(ModuleValueListSize);
2698 MDValueList.shrinkTo(ModuleMDValueListSize);
2699 std::vector<BasicBlock*>().swap(FunctionBBs);
2703 /// FindFunctionInStream - Find the function body in the bitcode stream
2704 bool BitcodeReader::FindFunctionInStream(Function *F,
2705 DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator) {
2706 while (DeferredFunctionInfoIterator->second == 0) {
2707 if (Stream.AtEndOfStream())
2708 return Error("Could not find Function in stream");
2709 // ParseModule will parse the next body in the stream and set its
2710 // position in the DeferredFunctionInfo map.
2711 if (ParseModule(true)) return true;
2716 //===----------------------------------------------------------------------===//
2717 // GVMaterializer implementation
2718 //===----------------------------------------------------------------------===//
2721 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2722 if (const Function *F = dyn_cast<Function>(GV)) {
2723 return F->isDeclaration() &&
2724 DeferredFunctionInfo.count(const_cast<Function*>(F));
2729 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2730 Function *F = dyn_cast<Function>(GV);
2731 // If it's not a function or is already material, ignore the request.
2732 if (!F || !F->isMaterializable()) return false;
2734 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2735 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2736 // If its position is recorded as 0, its body is somewhere in the stream
2737 // but we haven't seen it yet.
2738 if (DFII->second == 0)
2739 if (LazyStreamer && FindFunctionInStream(F, DFII)) return true;
2741 // Move the bit stream to the saved position of the deferred function body.
2742 Stream.JumpToBit(DFII->second);
2744 if (ParseFunctionBody(F)) {
2745 if (ErrInfo) *ErrInfo = ErrorString;
2749 // Upgrade any old intrinsic calls in the function.
2750 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2751 E = UpgradedIntrinsics.end(); I != E; ++I) {
2752 if (I->first != I->second) {
2753 for (Value::use_iterator UI = I->first->use_begin(),
2754 UE = I->first->use_end(); UI != UE; ) {
2755 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2756 UpgradeIntrinsicCall(CI, I->second);
2764 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2765 const Function *F = dyn_cast<Function>(GV);
2766 if (!F || F->isDeclaration())
2768 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2771 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2772 Function *F = dyn_cast<Function>(GV);
2773 // If this function isn't dematerializable, this is a noop.
2774 if (!F || !isDematerializable(F))
2777 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2779 // Just forget the function body, we can remat it later.
2784 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2785 assert(M == TheModule &&
2786 "Can only Materialize the Module this BitcodeReader is attached to.");
2787 // Iterate over the module, deserializing any functions that are still on
2789 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2791 if (F->isMaterializable() &&
2792 Materialize(F, ErrInfo))
2795 // At this point, if there are any function bodies, the current bit is
2796 // pointing to the END_BLOCK record after them. Now make sure the rest
2797 // of the bits in the module have been read.
2801 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2802 // delete the old functions to clean up. We can't do this unless the entire
2803 // module is materialized because there could always be another function body
2804 // with calls to the old function.
2805 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2806 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2807 if (I->first != I->second) {
2808 for (Value::use_iterator UI = I->first->use_begin(),
2809 UE = I->first->use_end(); UI != UE; ) {
2810 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2811 UpgradeIntrinsicCall(CI, I->second);
2813 if (!I->first->use_empty())
2814 I->first->replaceAllUsesWith(I->second);
2815 I->first->eraseFromParent();
2818 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2823 bool BitcodeReader::InitStream() {
2824 if (LazyStreamer) return InitLazyStream();
2825 return InitStreamFromBuffer();
2828 bool BitcodeReader::InitStreamFromBuffer() {
2829 const unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
2830 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
2832 if (Buffer->getBufferSize() & 3) {
2833 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
2834 return Error("Invalid bitcode signature");
2836 return Error("Bitcode stream should be a multiple of 4 bytes in length");
2839 // If we have a wrapper header, parse it and ignore the non-bc file contents.
2840 // The magic number is 0x0B17C0DE stored in little endian.
2841 if (isBitcodeWrapper(BufPtr, BufEnd))
2842 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
2843 return Error("Invalid bitcode wrapper header");
2845 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
2846 Stream.init(*StreamFile);
2851 bool BitcodeReader::InitLazyStream() {
2852 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
2854 StreamingMemoryObject *Bytes = new StreamingMemoryObject(LazyStreamer);
2855 StreamFile.reset(new BitstreamReader(Bytes));
2856 Stream.init(*StreamFile);
2858 unsigned char buf[16];
2859 if (Bytes->readBytes(0, 16, buf, NULL) == -1)
2860 return Error("Bitcode stream must be at least 16 bytes in length");
2862 if (!isBitcode(buf, buf + 16))
2863 return Error("Invalid bitcode signature");
2865 if (isBitcodeWrapper(buf, buf + 4)) {
2866 const unsigned char *bitcodeStart = buf;
2867 const unsigned char *bitcodeEnd = buf + 16;
2868 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
2869 Bytes->dropLeadingBytes(bitcodeStart - buf);
2870 Bytes->setKnownObjectSize(bitcodeEnd - bitcodeStart);
2875 //===----------------------------------------------------------------------===//
2876 // External interface
2877 //===----------------------------------------------------------------------===//
2879 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2881 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2882 LLVMContext& Context,
2883 std::string *ErrMsg) {
2884 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2885 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2886 M->setMaterializer(R);
2887 if (R->ParseBitcodeInto(M)) {
2889 *ErrMsg = R->getErrorString();
2891 delete M; // Also deletes R.
2894 // Have the BitcodeReader dtor delete 'Buffer'.
2895 R->setBufferOwned(true);
2897 R->materializeForwardReferencedFunctions();
2903 Module *llvm::getStreamedBitcodeModule(const std::string &name,
2904 DataStreamer *streamer,
2905 LLVMContext &Context,
2906 std::string *ErrMsg) {
2907 Module *M = new Module(name, Context);
2908 BitcodeReader *R = new BitcodeReader(streamer, Context);
2909 M->setMaterializer(R);
2910 if (R->ParseBitcodeInto(M)) {
2912 *ErrMsg = R->getErrorString();
2913 delete M; // Also deletes R.
2916 R->setBufferOwned(false); // no buffer to delete
2920 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2921 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2922 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2923 std::string *ErrMsg){
2924 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2927 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2928 // there was an error.
2929 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2931 // Read in the entire module, and destroy the BitcodeReader.
2932 if (M->MaterializeAllPermanently(ErrMsg)) {
2937 // TODO: Restore the use-lists to the in-memory state when the bitcode was
2938 // written. We must defer until the Module has been fully materialized.
2943 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
2944 LLVMContext& Context,
2945 std::string *ErrMsg) {
2946 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2947 // Don't let the BitcodeReader dtor delete 'Buffer'.
2948 R->setBufferOwned(false);
2950 std::string Triple("");
2951 if (R->ParseTriple(Triple))
2953 *ErrMsg = R->getErrorString();