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 // FIXME: remove in LLVM 3.0
467 // The alignment is stored as a 16-bit raw value from bits 31--16.
468 // We shift the bits above 31 down by 11 bits.
470 unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
471 if (Alignment && !isPowerOf2_32(Alignment))
472 return Error("Alignment is not a power of two.");
474 Attributes ReconstitutedAttr(Record[i+1] & 0xffff);
476 ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
478 Attributes((Record[i+1] & (0xffffull << 32)) >> 11);
480 Record[i+1] = ReconstitutedAttr.Raw();
483 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
484 if (Attributes(Record[i+1]) != Attribute::None)
485 Attrs.push_back(AttributeWithIndex::get(Record[i],
486 Attributes(Record[i+1])));
489 MAttributes.push_back(AttrListPtr::get(Attrs));
497 bool BitcodeReader::ParseTypeTable() {
498 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
499 return Error("Malformed block record");
501 return ParseTypeTableBody();
504 bool BitcodeReader::ParseTypeTableBody() {
505 if (!TypeList.empty())
506 return Error("Multiple TYPE_BLOCKs found!");
508 SmallVector<uint64_t, 64> Record;
509 unsigned NumRecords = 0;
511 SmallString<64> TypeName;
513 // Read all the records for this type table.
515 unsigned Code = Stream.ReadCode();
516 if (Code == bitc::END_BLOCK) {
517 if (NumRecords != TypeList.size())
518 return Error("Invalid type forward reference in TYPE_BLOCK");
519 if (Stream.ReadBlockEnd())
520 return Error("Error at end of type table block");
524 if (Code == bitc::ENTER_SUBBLOCK) {
525 // No known subblocks, always skip them.
526 Stream.ReadSubBlockID();
527 if (Stream.SkipBlock())
528 return Error("Malformed block record");
532 if (Code == bitc::DEFINE_ABBREV) {
533 Stream.ReadAbbrevRecord();
540 switch (Stream.ReadRecord(Code, Record)) {
541 default: return Error("unknown type in type table");
542 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
543 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
544 // type list. This allows us to reserve space.
545 if (Record.size() < 1)
546 return Error("Invalid TYPE_CODE_NUMENTRY record");
547 TypeList.resize(Record[0]);
549 case bitc::TYPE_CODE_VOID: // VOID
550 ResultTy = Type::getVoidTy(Context);
552 case bitc::TYPE_CODE_HALF: // HALF
553 ResultTy = Type::getHalfTy(Context);
555 case bitc::TYPE_CODE_FLOAT: // FLOAT
556 ResultTy = Type::getFloatTy(Context);
558 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
559 ResultTy = Type::getDoubleTy(Context);
561 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
562 ResultTy = Type::getX86_FP80Ty(Context);
564 case bitc::TYPE_CODE_FP128: // FP128
565 ResultTy = Type::getFP128Ty(Context);
567 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
568 ResultTy = Type::getPPC_FP128Ty(Context);
570 case bitc::TYPE_CODE_LABEL: // LABEL
571 ResultTy = Type::getLabelTy(Context);
573 case bitc::TYPE_CODE_METADATA: // METADATA
574 ResultTy = Type::getMetadataTy(Context);
576 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
577 ResultTy = Type::getX86_MMXTy(Context);
579 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
580 if (Record.size() < 1)
581 return Error("Invalid Integer type record");
583 ResultTy = IntegerType::get(Context, Record[0]);
585 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
586 // [pointee type, address space]
587 if (Record.size() < 1)
588 return Error("Invalid POINTER type record");
589 unsigned AddressSpace = 0;
590 if (Record.size() == 2)
591 AddressSpace = Record[1];
592 ResultTy = getTypeByID(Record[0]);
593 if (ResultTy == 0) return Error("invalid element type in pointer type");
594 ResultTy = PointerType::get(ResultTy, AddressSpace);
597 case bitc::TYPE_CODE_FUNCTION_OLD: {
598 // FIXME: attrid is dead, remove it in LLVM 4.0
599 // FUNCTION: [vararg, attrid, retty, paramty x N]
600 if (Record.size() < 3)
601 return Error("Invalid FUNCTION type record");
602 SmallVector<Type*, 8> ArgTys;
603 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
604 if (Type *T = getTypeByID(Record[i]))
610 ResultTy = getTypeByID(Record[2]);
611 if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
612 return Error("invalid type in function type");
614 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
617 case bitc::TYPE_CODE_FUNCTION: {
618 // FUNCTION: [vararg, retty, paramty x N]
619 if (Record.size() < 2)
620 return Error("Invalid FUNCTION type record");
621 SmallVector<Type*, 8> ArgTys;
622 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
623 if (Type *T = getTypeByID(Record[i]))
629 ResultTy = getTypeByID(Record[1]);
630 if (ResultTy == 0 || ArgTys.size() < Record.size()-2)
631 return Error("invalid type in function type");
633 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
636 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
637 if (Record.size() < 1)
638 return Error("Invalid STRUCT type record");
639 SmallVector<Type*, 8> EltTys;
640 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
641 if (Type *T = getTypeByID(Record[i]))
646 if (EltTys.size() != Record.size()-1)
647 return Error("invalid type in struct type");
648 ResultTy = StructType::get(Context, EltTys, Record[0]);
651 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
652 if (ConvertToString(Record, 0, TypeName))
653 return Error("Invalid STRUCT_NAME record");
656 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
657 if (Record.size() < 1)
658 return Error("Invalid STRUCT type record");
660 if (NumRecords >= TypeList.size())
661 return Error("invalid TYPE table");
663 // Check to see if this was forward referenced, if so fill in the temp.
664 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
666 Res->setName(TypeName);
667 TypeList[NumRecords] = 0;
668 } else // Otherwise, create a new struct.
669 Res = StructType::create(Context, TypeName);
672 SmallVector<Type*, 8> EltTys;
673 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
674 if (Type *T = getTypeByID(Record[i]))
679 if (EltTys.size() != Record.size()-1)
680 return Error("invalid STRUCT type record");
681 Res->setBody(EltTys, Record[0]);
685 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
686 if (Record.size() != 1)
687 return Error("Invalid OPAQUE type record");
689 if (NumRecords >= TypeList.size())
690 return Error("invalid TYPE table");
692 // Check to see if this was forward referenced, if so fill in the temp.
693 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
695 Res->setName(TypeName);
696 TypeList[NumRecords] = 0;
697 } else // Otherwise, create a new struct with no body.
698 Res = StructType::create(Context, TypeName);
703 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
704 if (Record.size() < 2)
705 return Error("Invalid ARRAY type record");
706 if ((ResultTy = getTypeByID(Record[1])))
707 ResultTy = ArrayType::get(ResultTy, Record[0]);
709 return Error("Invalid ARRAY type element");
711 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
712 if (Record.size() < 2)
713 return Error("Invalid VECTOR type record");
714 if ((ResultTy = getTypeByID(Record[1])))
715 ResultTy = VectorType::get(ResultTy, Record[0]);
717 return Error("Invalid ARRAY type element");
721 if (NumRecords >= TypeList.size())
722 return Error("invalid TYPE table");
723 assert(ResultTy && "Didn't read a type?");
724 assert(TypeList[NumRecords] == 0 && "Already read type?");
725 TypeList[NumRecords++] = ResultTy;
729 bool BitcodeReader::ParseValueSymbolTable() {
730 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
731 return Error("Malformed block record");
733 SmallVector<uint64_t, 64> Record;
735 // Read all the records for this value table.
736 SmallString<128> ValueName;
738 unsigned Code = Stream.ReadCode();
739 if (Code == bitc::END_BLOCK) {
740 if (Stream.ReadBlockEnd())
741 return Error("Error at end of value symbol table block");
744 if (Code == bitc::ENTER_SUBBLOCK) {
745 // No known subblocks, always skip them.
746 Stream.ReadSubBlockID();
747 if (Stream.SkipBlock())
748 return Error("Malformed block record");
752 if (Code == bitc::DEFINE_ABBREV) {
753 Stream.ReadAbbrevRecord();
759 switch (Stream.ReadRecord(Code, Record)) {
760 default: // Default behavior: unknown type.
762 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
763 if (ConvertToString(Record, 1, ValueName))
764 return Error("Invalid VST_ENTRY record");
765 unsigned ValueID = Record[0];
766 if (ValueID >= ValueList.size())
767 return Error("Invalid Value ID in VST_ENTRY record");
768 Value *V = ValueList[ValueID];
770 V->setName(StringRef(ValueName.data(), ValueName.size()));
774 case bitc::VST_CODE_BBENTRY: {
775 if (ConvertToString(Record, 1, ValueName))
776 return Error("Invalid VST_BBENTRY record");
777 BasicBlock *BB = getBasicBlock(Record[0]);
779 return Error("Invalid BB ID in VST_BBENTRY record");
781 BB->setName(StringRef(ValueName.data(), ValueName.size()));
789 bool BitcodeReader::ParseMetadata() {
790 unsigned NextMDValueNo = MDValueList.size();
792 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
793 return Error("Malformed block record");
795 SmallVector<uint64_t, 64> Record;
797 // Read all the records.
799 unsigned Code = Stream.ReadCode();
800 if (Code == bitc::END_BLOCK) {
801 if (Stream.ReadBlockEnd())
802 return Error("Error at end of PARAMATTR block");
806 if (Code == bitc::ENTER_SUBBLOCK) {
807 // No known subblocks, always skip them.
808 Stream.ReadSubBlockID();
809 if (Stream.SkipBlock())
810 return Error("Malformed block record");
814 if (Code == bitc::DEFINE_ABBREV) {
815 Stream.ReadAbbrevRecord();
819 bool IsFunctionLocal = false;
822 Code = Stream.ReadRecord(Code, Record);
824 default: // Default behavior: ignore.
826 case bitc::METADATA_NAME: {
827 // Read named of the named metadata.
828 SmallString<8> Name(Record.begin(), Record.end());
830 Code = Stream.ReadCode();
832 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
833 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
834 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
836 // Read named metadata elements.
837 unsigned Size = Record.size();
838 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
839 for (unsigned i = 0; i != Size; ++i) {
840 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
842 return Error("Malformed metadata record");
847 case bitc::METADATA_FN_NODE:
848 IsFunctionLocal = true;
850 case bitc::METADATA_NODE: {
851 if (Record.size() % 2 == 1)
852 return Error("Invalid METADATA_NODE record");
854 unsigned Size = Record.size();
855 SmallVector<Value*, 8> Elts;
856 for (unsigned i = 0; i != Size; i += 2) {
857 Type *Ty = getTypeByID(Record[i]);
858 if (!Ty) return Error("Invalid METADATA_NODE record");
859 if (Ty->isMetadataTy())
860 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
861 else if (!Ty->isVoidTy())
862 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
864 Elts.push_back(NULL);
866 Value *V = MDNode::getWhenValsUnresolved(Context, Elts, IsFunctionLocal);
867 IsFunctionLocal = false;
868 MDValueList.AssignValue(V, NextMDValueNo++);
871 case bitc::METADATA_STRING: {
872 SmallString<8> String(Record.begin(), Record.end());
873 Value *V = MDString::get(Context, String);
874 MDValueList.AssignValue(V, NextMDValueNo++);
877 case bitc::METADATA_KIND: {
878 if (Record.size() < 2)
879 return Error("Invalid METADATA_KIND record");
881 unsigned Kind = Record[0];
882 SmallString<8> Name(Record.begin()+1, Record.end());
884 unsigned NewKind = TheModule->getMDKindID(Name.str());
885 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
886 return Error("Conflicting METADATA_KIND records");
893 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
894 /// the LSB for dense VBR encoding.
895 static uint64_t DecodeSignRotatedValue(uint64_t V) {
900 // There is no such thing as -0 with integers. "-0" really means MININT.
904 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
905 /// values and aliases that we can.
906 bool BitcodeReader::ResolveGlobalAndAliasInits() {
907 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
908 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
910 GlobalInitWorklist.swap(GlobalInits);
911 AliasInitWorklist.swap(AliasInits);
913 while (!GlobalInitWorklist.empty()) {
914 unsigned ValID = GlobalInitWorklist.back().second;
915 if (ValID >= ValueList.size()) {
916 // Not ready to resolve this yet, it requires something later in the file.
917 GlobalInits.push_back(GlobalInitWorklist.back());
919 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
920 GlobalInitWorklist.back().first->setInitializer(C);
922 return Error("Global variable initializer is not a constant!");
924 GlobalInitWorklist.pop_back();
927 while (!AliasInitWorklist.empty()) {
928 unsigned ValID = AliasInitWorklist.back().second;
929 if (ValID >= ValueList.size()) {
930 AliasInits.push_back(AliasInitWorklist.back());
932 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
933 AliasInitWorklist.back().first->setAliasee(C);
935 return Error("Alias initializer is not a constant!");
937 AliasInitWorklist.pop_back();
942 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
943 SmallVector<uint64_t, 8> Words(Vals.size());
944 std::transform(Vals.begin(), Vals.end(), Words.begin(),
945 DecodeSignRotatedValue);
947 return APInt(TypeBits, Words);
950 bool BitcodeReader::ParseConstants() {
951 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
952 return Error("Malformed block record");
954 SmallVector<uint64_t, 64> Record;
956 // Read all the records for this value table.
957 Type *CurTy = Type::getInt32Ty(Context);
958 unsigned NextCstNo = ValueList.size();
960 unsigned Code = Stream.ReadCode();
961 if (Code == bitc::END_BLOCK)
964 if (Code == bitc::ENTER_SUBBLOCK) {
965 // No known subblocks, always skip them.
966 Stream.ReadSubBlockID();
967 if (Stream.SkipBlock())
968 return Error("Malformed block record");
972 if (Code == bitc::DEFINE_ABBREV) {
973 Stream.ReadAbbrevRecord();
980 unsigned BitCode = Stream.ReadRecord(Code, Record);
982 default: // Default behavior: unknown constant
983 case bitc::CST_CODE_UNDEF: // UNDEF
984 V = UndefValue::get(CurTy);
986 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
988 return Error("Malformed CST_SETTYPE record");
989 if (Record[0] >= TypeList.size())
990 return Error("Invalid Type ID in CST_SETTYPE record");
991 CurTy = TypeList[Record[0]];
992 continue; // Skip the ValueList manipulation.
993 case bitc::CST_CODE_NULL: // NULL
994 V = Constant::getNullValue(CurTy);
996 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
997 if (!CurTy->isIntegerTy() || Record.empty())
998 return Error("Invalid CST_INTEGER record");
999 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
1001 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
1002 if (!CurTy->isIntegerTy() || Record.empty())
1003 return Error("Invalid WIDE_INTEGER record");
1005 APInt VInt = ReadWideAPInt(Record,
1006 cast<IntegerType>(CurTy)->getBitWidth());
1007 V = ConstantInt::get(Context, VInt);
1011 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1013 return Error("Invalid FLOAT record");
1014 if (CurTy->isHalfTy())
1015 V = ConstantFP::get(Context, APFloat(APInt(16, (uint16_t)Record[0])));
1016 else if (CurTy->isFloatTy())
1017 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1018 else if (CurTy->isDoubleTy())
1019 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1020 else if (CurTy->isX86_FP80Ty()) {
1021 // Bits are not stored the same way as a normal i80 APInt, compensate.
1022 uint64_t Rearrange[2];
1023 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1024 Rearrange[1] = Record[0] >> 48;
1025 V = ConstantFP::get(Context, APFloat(APInt(80, Rearrange)));
1026 } else if (CurTy->isFP128Ty())
1027 V = ConstantFP::get(Context, APFloat(APInt(128, Record), true));
1028 else if (CurTy->isPPC_FP128Ty())
1029 V = ConstantFP::get(Context, APFloat(APInt(128, Record)));
1031 V = UndefValue::get(CurTy);
1035 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1037 return Error("Invalid CST_AGGREGATE record");
1039 unsigned Size = Record.size();
1040 SmallVector<Constant*, 16> Elts;
1042 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1043 for (unsigned i = 0; i != Size; ++i)
1044 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1045 STy->getElementType(i)));
1046 V = ConstantStruct::get(STy, Elts);
1047 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1048 Type *EltTy = ATy->getElementType();
1049 for (unsigned i = 0; i != Size; ++i)
1050 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1051 V = ConstantArray::get(ATy, Elts);
1052 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1053 Type *EltTy = VTy->getElementType();
1054 for (unsigned i = 0; i != Size; ++i)
1055 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1056 V = ConstantVector::get(Elts);
1058 V = UndefValue::get(CurTy);
1062 case bitc::CST_CODE_STRING: // STRING: [values]
1063 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1065 return Error("Invalid CST_STRING record");
1067 SmallString<16> Elts(Record.begin(), Record.end());
1068 V = ConstantDataArray::getString(Context, Elts,
1069 BitCode == bitc::CST_CODE_CSTRING);
1072 case bitc::CST_CODE_DATA: {// DATA: [n x value]
1074 return Error("Invalid CST_DATA record");
1076 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
1077 unsigned Size = Record.size();
1079 if (EltTy->isIntegerTy(8)) {
1080 SmallVector<uint8_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(16)) {
1086 SmallVector<uint16_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(32)) {
1092 SmallVector<uint32_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->isIntegerTy(64)) {
1098 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
1099 if (isa<VectorType>(CurTy))
1100 V = ConstantDataVector::get(Context, Elts);
1102 V = ConstantDataArray::get(Context, Elts);
1103 } else if (EltTy->isFloatTy()) {
1104 SmallVector<float, 16> Elts(Size);
1105 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
1106 if (isa<VectorType>(CurTy))
1107 V = ConstantDataVector::get(Context, Elts);
1109 V = ConstantDataArray::get(Context, Elts);
1110 } else if (EltTy->isDoubleTy()) {
1111 SmallVector<double, 16> Elts(Size);
1112 std::transform(Record.begin(), Record.end(), Elts.begin(),
1114 if (isa<VectorType>(CurTy))
1115 V = ConstantDataVector::get(Context, Elts);
1117 V = ConstantDataArray::get(Context, Elts);
1119 return Error("Unknown element type in CE_DATA");
1124 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1125 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1126 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1128 V = UndefValue::get(CurTy); // Unknown binop.
1130 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1131 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1133 if (Record.size() >= 4) {
1134 if (Opc == Instruction::Add ||
1135 Opc == Instruction::Sub ||
1136 Opc == Instruction::Mul ||
1137 Opc == Instruction::Shl) {
1138 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1139 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1140 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1141 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1142 } else if (Opc == Instruction::SDiv ||
1143 Opc == Instruction::UDiv ||
1144 Opc == Instruction::LShr ||
1145 Opc == Instruction::AShr) {
1146 if (Record[3] & (1 << bitc::PEO_EXACT))
1147 Flags |= SDivOperator::IsExact;
1150 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1154 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1155 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1156 int Opc = GetDecodedCastOpcode(Record[0]);
1158 V = UndefValue::get(CurTy); // Unknown cast.
1160 Type *OpTy = getTypeByID(Record[1]);
1161 if (!OpTy) return Error("Invalid CE_CAST record");
1162 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1163 V = ConstantExpr::getCast(Opc, Op, CurTy);
1167 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1168 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1169 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1170 SmallVector<Constant*, 16> Elts;
1171 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1172 Type *ElTy = getTypeByID(Record[i]);
1173 if (!ElTy) return Error("Invalid CE_GEP record");
1174 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1176 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1177 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1179 bitc::CST_CODE_CE_INBOUNDS_GEP);
1182 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1183 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1184 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1185 Type::getInt1Ty(Context)),
1186 ValueList.getConstantFwdRef(Record[1],CurTy),
1187 ValueList.getConstantFwdRef(Record[2],CurTy));
1189 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1190 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1192 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1193 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1194 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1195 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1196 V = ConstantExpr::getExtractElement(Op0, Op1);
1199 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1200 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1201 if (Record.size() < 3 || OpTy == 0)
1202 return Error("Invalid CE_INSERTELT record");
1203 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1204 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1205 OpTy->getElementType());
1206 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1207 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1210 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1211 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1212 if (Record.size() < 3 || OpTy == 0)
1213 return Error("Invalid CE_SHUFFLEVEC record");
1214 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1215 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1216 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1217 OpTy->getNumElements());
1218 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1219 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1222 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1223 VectorType *RTy = dyn_cast<VectorType>(CurTy);
1225 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1226 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1227 return Error("Invalid CE_SHUFVEC_EX record");
1228 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1229 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1230 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1231 RTy->getNumElements());
1232 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1233 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1236 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1237 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1238 Type *OpTy = getTypeByID(Record[0]);
1239 if (OpTy == 0) return Error("Invalid CE_CMP record");
1240 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1241 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1243 if (OpTy->isFPOrFPVectorTy())
1244 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1246 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1249 case bitc::CST_CODE_INLINEASM: {
1250 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1251 std::string AsmStr, ConstrStr;
1252 bool HasSideEffects = Record[0] & 1;
1253 bool IsAlignStack = Record[0] >> 1;
1254 unsigned AsmStrSize = Record[1];
1255 if (2+AsmStrSize >= Record.size())
1256 return Error("Invalid INLINEASM record");
1257 unsigned ConstStrSize = Record[2+AsmStrSize];
1258 if (3+AsmStrSize+ConstStrSize > Record.size())
1259 return Error("Invalid INLINEASM record");
1261 for (unsigned i = 0; i != AsmStrSize; ++i)
1262 AsmStr += (char)Record[2+i];
1263 for (unsigned i = 0; i != ConstStrSize; ++i)
1264 ConstrStr += (char)Record[3+AsmStrSize+i];
1265 PointerType *PTy = cast<PointerType>(CurTy);
1266 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1267 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1270 case bitc::CST_CODE_BLOCKADDRESS:{
1271 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1272 Type *FnTy = getTypeByID(Record[0]);
1273 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1275 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1276 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1278 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1279 Type::getInt8Ty(Context),
1280 false, GlobalValue::InternalLinkage,
1282 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1288 ValueList.AssignValue(V, NextCstNo);
1292 if (NextCstNo != ValueList.size())
1293 return Error("Invalid constant reference!");
1295 if (Stream.ReadBlockEnd())
1296 return Error("Error at end of constants block");
1298 // Once all the constants have been read, go through and resolve forward
1300 ValueList.ResolveConstantForwardRefs();
1304 bool BitcodeReader::ParseUseLists() {
1305 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
1306 return Error("Malformed block record");
1308 SmallVector<uint64_t, 64> Record;
1310 // Read all the records.
1312 unsigned Code = Stream.ReadCode();
1313 if (Code == bitc::END_BLOCK) {
1314 if (Stream.ReadBlockEnd())
1315 return Error("Error at end of use-list table block");
1319 if (Code == bitc::ENTER_SUBBLOCK) {
1320 // No known subblocks, always skip them.
1321 Stream.ReadSubBlockID();
1322 if (Stream.SkipBlock())
1323 return Error("Malformed block record");
1327 if (Code == bitc::DEFINE_ABBREV) {
1328 Stream.ReadAbbrevRecord();
1332 // Read a use list record.
1334 switch (Stream.ReadRecord(Code, Record)) {
1335 default: // Default behavior: unknown type.
1337 case bitc::USELIST_CODE_ENTRY: { // USELIST_CODE_ENTRY: TBD.
1338 unsigned RecordLength = Record.size();
1339 if (RecordLength < 1)
1340 return Error ("Invalid UseList reader!");
1341 UseListRecords.push_back(Record);
1348 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1349 /// remember where it is and then skip it. This lets us lazily deserialize the
1351 bool BitcodeReader::RememberAndSkipFunctionBody() {
1352 // Get the function we are talking about.
1353 if (FunctionsWithBodies.empty())
1354 return Error("Insufficient function protos");
1356 Function *Fn = FunctionsWithBodies.back();
1357 FunctionsWithBodies.pop_back();
1359 // Save the current stream state.
1360 uint64_t CurBit = Stream.GetCurrentBitNo();
1361 DeferredFunctionInfo[Fn] = CurBit;
1363 // Skip over the function block for now.
1364 if (Stream.SkipBlock())
1365 return Error("Malformed block record");
1369 bool BitcodeReader::GlobalCleanup() {
1370 // Patch the initializers for globals and aliases up.
1371 ResolveGlobalAndAliasInits();
1372 if (!GlobalInits.empty() || !AliasInits.empty())
1373 return Error("Malformed global initializer set");
1375 // Look for intrinsic functions which need to be upgraded at some point
1376 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1379 if (UpgradeIntrinsicFunction(FI, NewFn))
1380 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1383 // Look for global variables which need to be renamed.
1384 for (Module::global_iterator
1385 GI = TheModule->global_begin(), GE = TheModule->global_end();
1387 UpgradeGlobalVariable(GI);
1388 // Force deallocation of memory for these vectors to favor the client that
1389 // want lazy deserialization.
1390 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1391 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1395 bool BitcodeReader::ParseModule(bool Resume) {
1397 Stream.JumpToBit(NextUnreadBit);
1398 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1399 return Error("Malformed block record");
1401 SmallVector<uint64_t, 64> Record;
1402 std::vector<std::string> SectionTable;
1403 std::vector<std::string> GCTable;
1405 // Read all the records for this module.
1406 while (!Stream.AtEndOfStream()) {
1407 unsigned Code = Stream.ReadCode();
1408 if (Code == bitc::END_BLOCK) {
1409 if (Stream.ReadBlockEnd())
1410 return Error("Error at end of module block");
1412 return GlobalCleanup();
1415 if (Code == bitc::ENTER_SUBBLOCK) {
1416 switch (Stream.ReadSubBlockID()) {
1417 default: // Skip unknown content.
1418 if (Stream.SkipBlock())
1419 return Error("Malformed block record");
1421 case bitc::BLOCKINFO_BLOCK_ID:
1422 if (Stream.ReadBlockInfoBlock())
1423 return Error("Malformed BlockInfoBlock");
1425 case bitc::PARAMATTR_BLOCK_ID:
1426 if (ParseAttributeBlock())
1429 case bitc::TYPE_BLOCK_ID_NEW:
1430 if (ParseTypeTable())
1433 case bitc::VALUE_SYMTAB_BLOCK_ID:
1434 if (ParseValueSymbolTable())
1436 SeenValueSymbolTable = true;
1438 case bitc::CONSTANTS_BLOCK_ID:
1439 if (ParseConstants() || ResolveGlobalAndAliasInits())
1442 case bitc::METADATA_BLOCK_ID:
1443 if (ParseMetadata())
1446 case bitc::FUNCTION_BLOCK_ID:
1447 // If this is the first function body we've seen, reverse the
1448 // FunctionsWithBodies list.
1449 if (!SeenFirstFunctionBody) {
1450 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1451 if (GlobalCleanup())
1453 SeenFirstFunctionBody = true;
1456 if (RememberAndSkipFunctionBody())
1458 // For streaming bitcode, suspend parsing when we reach the function
1459 // bodies. Subsequent materialization calls will resume it when
1460 // necessary. For streaming, the function bodies must be at the end of
1461 // the bitcode. If the bitcode file is old, the symbol table will be
1462 // at the end instead and will not have been seen yet. In this case,
1463 // just finish the parse now.
1464 if (LazyStreamer && SeenValueSymbolTable) {
1465 NextUnreadBit = Stream.GetCurrentBitNo();
1469 case bitc::USELIST_BLOCK_ID:
1470 if (ParseUseLists())
1477 if (Code == bitc::DEFINE_ABBREV) {
1478 Stream.ReadAbbrevRecord();
1483 switch (Stream.ReadRecord(Code, Record)) {
1484 default: break; // Default behavior, ignore unknown content.
1485 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1486 if (Record.size() < 1)
1487 return Error("Malformed MODULE_CODE_VERSION");
1488 // Only version #0 is supported so far.
1490 return Error("Unknown bitstream version!");
1492 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1494 if (ConvertToString(Record, 0, S))
1495 return Error("Invalid MODULE_CODE_TRIPLE record");
1496 TheModule->setTargetTriple(S);
1499 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1501 if (ConvertToString(Record, 0, S))
1502 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1503 TheModule->setDataLayout(S);
1506 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1508 if (ConvertToString(Record, 0, S))
1509 return Error("Invalid MODULE_CODE_ASM record");
1510 TheModule->setModuleInlineAsm(S);
1513 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1515 if (ConvertToString(Record, 0, S))
1516 return Error("Invalid MODULE_CODE_DEPLIB record");
1517 TheModule->addLibrary(S);
1520 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1522 if (ConvertToString(Record, 0, S))
1523 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1524 SectionTable.push_back(S);
1527 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1529 if (ConvertToString(Record, 0, S))
1530 return Error("Invalid MODULE_CODE_GCNAME record");
1531 GCTable.push_back(S);
1534 // GLOBALVAR: [pointer type, isconst, initid,
1535 // linkage, alignment, section, visibility, threadlocal,
1537 case bitc::MODULE_CODE_GLOBALVAR: {
1538 if (Record.size() < 6)
1539 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1540 Type *Ty = getTypeByID(Record[0]);
1541 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1542 if (!Ty->isPointerTy())
1543 return Error("Global not a pointer type!");
1544 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1545 Ty = cast<PointerType>(Ty)->getElementType();
1547 bool isConstant = Record[1];
1548 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1549 unsigned Alignment = (1 << Record[4]) >> 1;
1550 std::string Section;
1552 if (Record[5]-1 >= SectionTable.size())
1553 return Error("Invalid section ID");
1554 Section = SectionTable[Record[5]-1];
1556 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1557 if (Record.size() > 6)
1558 Visibility = GetDecodedVisibility(Record[6]);
1559 bool isThreadLocal = false;
1560 if (Record.size() > 7)
1561 isThreadLocal = Record[7];
1563 bool UnnamedAddr = false;
1564 if (Record.size() > 8)
1565 UnnamedAddr = Record[8];
1567 GlobalVariable *NewGV =
1568 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1569 isThreadLocal, AddressSpace);
1570 NewGV->setAlignment(Alignment);
1571 if (!Section.empty())
1572 NewGV->setSection(Section);
1573 NewGV->setVisibility(Visibility);
1574 NewGV->setThreadLocal(isThreadLocal);
1575 NewGV->setUnnamedAddr(UnnamedAddr);
1577 ValueList.push_back(NewGV);
1579 // Remember which value to use for the global initializer.
1580 if (unsigned InitID = Record[2])
1581 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1584 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1585 // alignment, section, visibility, gc, unnamed_addr]
1586 case bitc::MODULE_CODE_FUNCTION: {
1587 if (Record.size() < 8)
1588 return Error("Invalid MODULE_CODE_FUNCTION record");
1589 Type *Ty = getTypeByID(Record[0]);
1590 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1591 if (!Ty->isPointerTy())
1592 return Error("Function not a pointer type!");
1594 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1596 return Error("Function not a pointer to function type!");
1598 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1601 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1602 bool isProto = Record[2];
1603 Func->setLinkage(GetDecodedLinkage(Record[3]));
1604 Func->setAttributes(getAttributes(Record[4]));
1606 Func->setAlignment((1 << Record[5]) >> 1);
1608 if (Record[6]-1 >= SectionTable.size())
1609 return Error("Invalid section ID");
1610 Func->setSection(SectionTable[Record[6]-1]);
1612 Func->setVisibility(GetDecodedVisibility(Record[7]));
1613 if (Record.size() > 8 && Record[8]) {
1614 if (Record[8]-1 > GCTable.size())
1615 return Error("Invalid GC ID");
1616 Func->setGC(GCTable[Record[8]-1].c_str());
1618 bool UnnamedAddr = false;
1619 if (Record.size() > 9)
1620 UnnamedAddr = Record[9];
1621 Func->setUnnamedAddr(UnnamedAddr);
1622 ValueList.push_back(Func);
1624 // If this is a function with a body, remember the prototype we are
1625 // creating now, so that we can match up the body with them later.
1627 FunctionsWithBodies.push_back(Func);
1628 if (LazyStreamer) DeferredFunctionInfo[Func] = 0;
1632 // ALIAS: [alias type, aliasee val#, linkage]
1633 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1634 case bitc::MODULE_CODE_ALIAS: {
1635 if (Record.size() < 3)
1636 return Error("Invalid MODULE_ALIAS record");
1637 Type *Ty = getTypeByID(Record[0]);
1638 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1639 if (!Ty->isPointerTy())
1640 return Error("Function not a pointer type!");
1642 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1644 // Old bitcode files didn't have visibility field.
1645 if (Record.size() > 3)
1646 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1647 ValueList.push_back(NewGA);
1648 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1651 /// MODULE_CODE_PURGEVALS: [numvals]
1652 case bitc::MODULE_CODE_PURGEVALS:
1653 // Trim down the value list to the specified size.
1654 if (Record.size() < 1 || Record[0] > ValueList.size())
1655 return Error("Invalid MODULE_PURGEVALS record");
1656 ValueList.shrinkTo(Record[0]);
1662 return Error("Premature end of bitstream");
1665 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1668 if (InitStream()) return true;
1670 // Sniff for the signature.
1671 if (Stream.Read(8) != 'B' ||
1672 Stream.Read(8) != 'C' ||
1673 Stream.Read(4) != 0x0 ||
1674 Stream.Read(4) != 0xC ||
1675 Stream.Read(4) != 0xE ||
1676 Stream.Read(4) != 0xD)
1677 return Error("Invalid bitcode signature");
1679 // We expect a number of well-defined blocks, though we don't necessarily
1680 // need to understand them all.
1681 while (!Stream.AtEndOfStream()) {
1682 unsigned Code = Stream.ReadCode();
1684 if (Code != bitc::ENTER_SUBBLOCK) {
1686 // The ranlib in xcode 4 will align archive members by appending newlines
1687 // to the end of them. If this file size is a multiple of 4 but not 8, we
1688 // have to read and ignore these final 4 bytes :-(
1689 if (Stream.GetAbbrevIDWidth() == 2 && Code == 2 &&
1690 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1691 Stream.AtEndOfStream())
1694 return Error("Invalid record at top-level");
1697 unsigned BlockID = Stream.ReadSubBlockID();
1699 // We only know the MODULE subblock ID.
1701 case bitc::BLOCKINFO_BLOCK_ID:
1702 if (Stream.ReadBlockInfoBlock())
1703 return Error("Malformed BlockInfoBlock");
1705 case bitc::MODULE_BLOCK_ID:
1706 // Reject multiple MODULE_BLOCK's in a single bitstream.
1708 return Error("Multiple MODULE_BLOCKs in same stream");
1710 if (ParseModule(false))
1712 if (LazyStreamer) return false;
1715 if (Stream.SkipBlock())
1716 return Error("Malformed block record");
1724 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1725 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1726 return Error("Malformed block record");
1728 SmallVector<uint64_t, 64> Record;
1730 // Read all the records for this module.
1731 while (!Stream.AtEndOfStream()) {
1732 unsigned Code = Stream.ReadCode();
1733 if (Code == bitc::END_BLOCK) {
1734 if (Stream.ReadBlockEnd())
1735 return Error("Error at end of module block");
1740 if (Code == bitc::ENTER_SUBBLOCK) {
1741 switch (Stream.ReadSubBlockID()) {
1742 default: // Skip unknown content.
1743 if (Stream.SkipBlock())
1744 return Error("Malformed block record");
1750 if (Code == bitc::DEFINE_ABBREV) {
1751 Stream.ReadAbbrevRecord();
1756 switch (Stream.ReadRecord(Code, Record)) {
1757 default: break; // Default behavior, ignore unknown content.
1758 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1759 if (Record.size() < 1)
1760 return Error("Malformed MODULE_CODE_VERSION");
1761 // Only version #0 is supported so far.
1763 return Error("Unknown bitstream version!");
1765 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1767 if (ConvertToString(Record, 0, S))
1768 return Error("Invalid MODULE_CODE_TRIPLE record");
1776 return Error("Premature end of bitstream");
1779 bool BitcodeReader::ParseTriple(std::string &Triple) {
1780 if (InitStream()) return true;
1782 // Sniff for the signature.
1783 if (Stream.Read(8) != 'B' ||
1784 Stream.Read(8) != 'C' ||
1785 Stream.Read(4) != 0x0 ||
1786 Stream.Read(4) != 0xC ||
1787 Stream.Read(4) != 0xE ||
1788 Stream.Read(4) != 0xD)
1789 return Error("Invalid bitcode signature");
1791 // We expect a number of well-defined blocks, though we don't necessarily
1792 // need to understand them all.
1793 while (!Stream.AtEndOfStream()) {
1794 unsigned Code = Stream.ReadCode();
1796 if (Code != bitc::ENTER_SUBBLOCK)
1797 return Error("Invalid record at top-level");
1799 unsigned BlockID = Stream.ReadSubBlockID();
1801 // We only know the MODULE subblock ID.
1803 case bitc::MODULE_BLOCK_ID:
1804 if (ParseModuleTriple(Triple))
1808 if (Stream.SkipBlock())
1809 return Error("Malformed block record");
1817 /// ParseMetadataAttachment - Parse metadata attachments.
1818 bool BitcodeReader::ParseMetadataAttachment() {
1819 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1820 return Error("Malformed block record");
1822 SmallVector<uint64_t, 64> Record;
1824 unsigned Code = Stream.ReadCode();
1825 if (Code == bitc::END_BLOCK) {
1826 if (Stream.ReadBlockEnd())
1827 return Error("Error at end of PARAMATTR block");
1830 if (Code == bitc::DEFINE_ABBREV) {
1831 Stream.ReadAbbrevRecord();
1834 // Read a metadata attachment record.
1836 switch (Stream.ReadRecord(Code, Record)) {
1837 default: // Default behavior: ignore.
1839 case bitc::METADATA_ATTACHMENT: {
1840 unsigned RecordLength = Record.size();
1841 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1842 return Error ("Invalid METADATA_ATTACHMENT reader!");
1843 Instruction *Inst = InstructionList[Record[0]];
1844 for (unsigned i = 1; i != RecordLength; i = i+2) {
1845 unsigned Kind = Record[i];
1846 DenseMap<unsigned, unsigned>::iterator I =
1847 MDKindMap.find(Kind);
1848 if (I == MDKindMap.end())
1849 return Error("Invalid metadata kind ID");
1850 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1851 Inst->setMetadata(I->second, cast<MDNode>(Node));
1860 /// ParseFunctionBody - Lazily parse the specified function body block.
1861 bool BitcodeReader::ParseFunctionBody(Function *F) {
1862 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1863 return Error("Malformed block record");
1865 InstructionList.clear();
1866 unsigned ModuleValueListSize = ValueList.size();
1867 unsigned ModuleMDValueListSize = MDValueList.size();
1869 // Add all the function arguments to the value table.
1870 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1871 ValueList.push_back(I);
1873 unsigned NextValueNo = ValueList.size();
1874 BasicBlock *CurBB = 0;
1875 unsigned CurBBNo = 0;
1879 // Read all the records.
1880 SmallVector<uint64_t, 64> Record;
1882 unsigned Code = Stream.ReadCode();
1883 if (Code == bitc::END_BLOCK) {
1884 if (Stream.ReadBlockEnd())
1885 return Error("Error at end of function block");
1889 if (Code == bitc::ENTER_SUBBLOCK) {
1890 switch (Stream.ReadSubBlockID()) {
1891 default: // Skip unknown content.
1892 if (Stream.SkipBlock())
1893 return Error("Malformed block record");
1895 case bitc::CONSTANTS_BLOCK_ID:
1896 if (ParseConstants()) return true;
1897 NextValueNo = ValueList.size();
1899 case bitc::VALUE_SYMTAB_BLOCK_ID:
1900 if (ParseValueSymbolTable()) return true;
1902 case bitc::METADATA_ATTACHMENT_ID:
1903 if (ParseMetadataAttachment()) return true;
1905 case bitc::METADATA_BLOCK_ID:
1906 if (ParseMetadata()) return true;
1912 if (Code == bitc::DEFINE_ABBREV) {
1913 Stream.ReadAbbrevRecord();
1920 unsigned BitCode = Stream.ReadRecord(Code, Record);
1922 default: // Default behavior: reject
1923 return Error("Unknown instruction");
1924 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1925 if (Record.size() < 1 || Record[0] == 0)
1926 return Error("Invalid DECLAREBLOCKS record");
1927 // Create all the basic blocks for the function.
1928 FunctionBBs.resize(Record[0]);
1929 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1930 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1931 CurBB = FunctionBBs[0];
1934 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1935 // This record indicates that the last instruction is at the same
1936 // location as the previous instruction with a location.
1939 // Get the last instruction emitted.
1940 if (CurBB && !CurBB->empty())
1942 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1943 !FunctionBBs[CurBBNo-1]->empty())
1944 I = &FunctionBBs[CurBBNo-1]->back();
1946 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1947 I->setDebugLoc(LastLoc);
1951 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
1952 I = 0; // Get the last instruction emitted.
1953 if (CurBB && !CurBB->empty())
1955 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1956 !FunctionBBs[CurBBNo-1]->empty())
1957 I = &FunctionBBs[CurBBNo-1]->back();
1958 if (I == 0 || Record.size() < 4)
1959 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
1961 unsigned Line = Record[0], Col = Record[1];
1962 unsigned ScopeID = Record[2], IAID = Record[3];
1964 MDNode *Scope = 0, *IA = 0;
1965 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
1966 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
1967 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
1968 I->setDebugLoc(LastLoc);
1973 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1976 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1977 getValue(Record, OpNum, LHS->getType(), RHS) ||
1978 OpNum+1 > Record.size())
1979 return Error("Invalid BINOP record");
1981 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
1982 if (Opc == -1) return Error("Invalid BINOP record");
1983 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
1984 InstructionList.push_back(I);
1985 if (OpNum < Record.size()) {
1986 if (Opc == Instruction::Add ||
1987 Opc == Instruction::Sub ||
1988 Opc == Instruction::Mul ||
1989 Opc == Instruction::Shl) {
1990 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1991 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
1992 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1993 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
1994 } else if (Opc == Instruction::SDiv ||
1995 Opc == Instruction::UDiv ||
1996 Opc == Instruction::LShr ||
1997 Opc == Instruction::AShr) {
1998 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
1999 cast<BinaryOperator>(I)->setIsExact(true);
2004 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
2007 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2008 OpNum+2 != Record.size())
2009 return Error("Invalid CAST record");
2011 Type *ResTy = getTypeByID(Record[OpNum]);
2012 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
2013 if (Opc == -1 || ResTy == 0)
2014 return Error("Invalid CAST record");
2015 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
2016 InstructionList.push_back(I);
2019 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
2020 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
2023 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
2024 return Error("Invalid GEP record");
2026 SmallVector<Value*, 16> GEPIdx;
2027 while (OpNum != Record.size()) {
2029 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2030 return Error("Invalid GEP record");
2031 GEPIdx.push_back(Op);
2034 I = GetElementPtrInst::Create(BasePtr, GEPIdx);
2035 InstructionList.push_back(I);
2036 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
2037 cast<GetElementPtrInst>(I)->setIsInBounds(true);
2041 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
2042 // EXTRACTVAL: [opty, opval, n x indices]
2045 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2046 return Error("Invalid EXTRACTVAL record");
2048 SmallVector<unsigned, 4> EXTRACTVALIdx;
2049 for (unsigned RecSize = Record.size();
2050 OpNum != RecSize; ++OpNum) {
2051 uint64_t Index = Record[OpNum];
2052 if ((unsigned)Index != Index)
2053 return Error("Invalid EXTRACTVAL index");
2054 EXTRACTVALIdx.push_back((unsigned)Index);
2057 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
2058 InstructionList.push_back(I);
2062 case bitc::FUNC_CODE_INST_INSERTVAL: {
2063 // INSERTVAL: [opty, opval, opty, opval, n x indices]
2066 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2067 return Error("Invalid INSERTVAL record");
2069 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
2070 return Error("Invalid INSERTVAL record");
2072 SmallVector<unsigned, 4> INSERTVALIdx;
2073 for (unsigned RecSize = Record.size();
2074 OpNum != RecSize; ++OpNum) {
2075 uint64_t Index = Record[OpNum];
2076 if ((unsigned)Index != Index)
2077 return Error("Invalid INSERTVAL index");
2078 INSERTVALIdx.push_back((unsigned)Index);
2081 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
2082 InstructionList.push_back(I);
2086 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2087 // obsolete form of select
2088 // handles select i1 ... in old bitcode
2090 Value *TrueVal, *FalseVal, *Cond;
2091 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2092 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2093 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
2094 return Error("Invalid SELECT record");
2096 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2097 InstructionList.push_back(I);
2101 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2102 // new form of select
2103 // handles select i1 or select [N x i1]
2105 Value *TrueVal, *FalseVal, *Cond;
2106 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2107 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2108 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2109 return Error("Invalid SELECT record");
2111 // select condition can be either i1 or [N x i1]
2112 if (VectorType* vector_type =
2113 dyn_cast<VectorType>(Cond->getType())) {
2115 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2116 return Error("Invalid SELECT condition type");
2119 if (Cond->getType() != Type::getInt1Ty(Context))
2120 return Error("Invalid SELECT condition type");
2123 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2124 InstructionList.push_back(I);
2128 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2131 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2132 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2133 return Error("Invalid EXTRACTELT record");
2134 I = ExtractElementInst::Create(Vec, Idx);
2135 InstructionList.push_back(I);
2139 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2141 Value *Vec, *Elt, *Idx;
2142 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2143 getValue(Record, OpNum,
2144 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2145 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2146 return Error("Invalid INSERTELT record");
2147 I = InsertElementInst::Create(Vec, Elt, Idx);
2148 InstructionList.push_back(I);
2152 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2154 Value *Vec1, *Vec2, *Mask;
2155 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2156 getValue(Record, OpNum, Vec1->getType(), Vec2))
2157 return Error("Invalid SHUFFLEVEC record");
2159 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2160 return Error("Invalid SHUFFLEVEC record");
2161 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2162 InstructionList.push_back(I);
2166 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2167 // Old form of ICmp/FCmp returning bool
2168 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2169 // both legal on vectors but had different behaviour.
2170 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2171 // FCmp/ICmp returning bool or vector of bool
2175 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2176 getValue(Record, OpNum, LHS->getType(), RHS) ||
2177 OpNum+1 != Record.size())
2178 return Error("Invalid CMP record");
2180 if (LHS->getType()->isFPOrFPVectorTy())
2181 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2183 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2184 InstructionList.push_back(I);
2188 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2190 unsigned Size = Record.size();
2192 I = ReturnInst::Create(Context);
2193 InstructionList.push_back(I);
2199 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2200 return Error("Invalid RET record");
2201 if (OpNum != Record.size())
2202 return Error("Invalid RET record");
2204 I = ReturnInst::Create(Context, Op);
2205 InstructionList.push_back(I);
2208 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2209 if (Record.size() != 1 && Record.size() != 3)
2210 return Error("Invalid BR record");
2211 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2213 return Error("Invalid BR record");
2215 if (Record.size() == 1) {
2216 I = BranchInst::Create(TrueDest);
2217 InstructionList.push_back(I);
2220 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2221 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
2222 if (FalseDest == 0 || Cond == 0)
2223 return Error("Invalid BR record");
2224 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2225 InstructionList.push_back(I);
2229 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2231 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
2232 // New SwitchInst format with case ranges.
2234 Type *OpTy = getTypeByID(Record[1]);
2235 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
2237 Value *Cond = getFnValueByID(Record[2], OpTy);
2238 BasicBlock *Default = getBasicBlock(Record[3]);
2239 if (OpTy == 0 || Cond == 0 || Default == 0)
2240 return Error("Invalid SWITCH record");
2242 unsigned NumCases = Record[4];
2244 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2245 InstructionList.push_back(SI);
2247 unsigned CurIdx = 5;
2248 for (unsigned i = 0; i != NumCases; ++i) {
2249 CRSBuilder CaseBuilder;
2250 unsigned NumItems = Record[CurIdx++];
2251 for (unsigned ci = 0; ci != NumItems; ++ci) {
2252 bool isSingleNumber = Record[CurIdx++];
2255 unsigned ActiveWords = 1;
2256 if (ValueBitWidth > 64)
2257 ActiveWords = Record[CurIdx++];
2258 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2260 CurIdx += ActiveWords;
2262 if (!isSingleNumber) {
2264 if (ValueBitWidth > 64)
2265 ActiveWords = Record[CurIdx++];
2267 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2269 IntItemConstantIntImpl HighImpl =
2270 cast<ConstantInt>(ConstantInt::get(OpTy, High));
2272 CaseBuilder.add(IntItem::fromType(OpTy, Low),
2273 IntItem::fromType(OpTy, High));
2274 CurIdx += ActiveWords;
2276 CaseBuilder.add(IntItem::fromType(OpTy, Low));
2278 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
2279 ConstantRangesSet Case = CaseBuilder.getCase();
2280 SI->addCase(Case, DestBB);
2282 uint16_t Hash = SI->hash();
2283 if (Hash != (Record[0] & 0xFFFF))
2284 return Error("Invalid SWITCH record");
2289 // Old SwitchInst format without case ranges.
2291 if (Record.size() < 3 || (Record.size() & 1) == 0)
2292 return Error("Invalid SWITCH record");
2293 Type *OpTy = getTypeByID(Record[0]);
2294 Value *Cond = getFnValueByID(Record[1], OpTy);
2295 BasicBlock *Default = getBasicBlock(Record[2]);
2296 if (OpTy == 0 || Cond == 0 || Default == 0)
2297 return Error("Invalid SWITCH record");
2298 unsigned NumCases = (Record.size()-3)/2;
2299 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2300 InstructionList.push_back(SI);
2301 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2302 ConstantInt *CaseVal =
2303 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2304 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2305 if (CaseVal == 0 || DestBB == 0) {
2307 return Error("Invalid SWITCH record!");
2309 SI->addCase(CaseVal, DestBB);
2314 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2315 if (Record.size() < 2)
2316 return Error("Invalid INDIRECTBR record");
2317 Type *OpTy = getTypeByID(Record[0]);
2318 Value *Address = getFnValueByID(Record[1], OpTy);
2319 if (OpTy == 0 || Address == 0)
2320 return Error("Invalid INDIRECTBR record");
2321 unsigned NumDests = Record.size()-2;
2322 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2323 InstructionList.push_back(IBI);
2324 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2325 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2326 IBI->addDestination(DestBB);
2329 return Error("Invalid INDIRECTBR record!");
2336 case bitc::FUNC_CODE_INST_INVOKE: {
2337 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2338 if (Record.size() < 4) return Error("Invalid INVOKE record");
2339 AttrListPtr PAL = getAttributes(Record[0]);
2340 unsigned CCInfo = Record[1];
2341 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2342 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2346 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2347 return Error("Invalid INVOKE record");
2349 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2350 FunctionType *FTy = !CalleeTy ? 0 :
2351 dyn_cast<FunctionType>(CalleeTy->getElementType());
2353 // Check that the right number of fixed parameters are here.
2354 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2355 Record.size() < OpNum+FTy->getNumParams())
2356 return Error("Invalid INVOKE record");
2358 SmallVector<Value*, 16> Ops;
2359 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2360 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2361 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2364 if (!FTy->isVarArg()) {
2365 if (Record.size() != OpNum)
2366 return Error("Invalid INVOKE record");
2368 // Read type/value pairs for varargs params.
2369 while (OpNum != Record.size()) {
2371 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2372 return Error("Invalid INVOKE record");
2377 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
2378 InstructionList.push_back(I);
2379 cast<InvokeInst>(I)->setCallingConv(
2380 static_cast<CallingConv::ID>(CCInfo));
2381 cast<InvokeInst>(I)->setAttributes(PAL);
2384 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
2387 if (getValueTypePair(Record, Idx, NextValueNo, Val))
2388 return Error("Invalid RESUME record");
2389 I = ResumeInst::Create(Val);
2390 InstructionList.push_back(I);
2393 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2394 I = new UnreachableInst(Context);
2395 InstructionList.push_back(I);
2397 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2398 if (Record.size() < 1 || ((Record.size()-1)&1))
2399 return Error("Invalid PHI record");
2400 Type *Ty = getTypeByID(Record[0]);
2401 if (!Ty) return Error("Invalid PHI record");
2403 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2404 InstructionList.push_back(PN);
2406 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2407 Value *V = getFnValueByID(Record[1+i], Ty);
2408 BasicBlock *BB = getBasicBlock(Record[2+i]);
2409 if (!V || !BB) return Error("Invalid PHI record");
2410 PN->addIncoming(V, BB);
2416 case bitc::FUNC_CODE_INST_LANDINGPAD: {
2417 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
2419 if (Record.size() < 4)
2420 return Error("Invalid LANDINGPAD record");
2421 Type *Ty = getTypeByID(Record[Idx++]);
2422 if (!Ty) return Error("Invalid LANDINGPAD record");
2424 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
2425 return Error("Invalid LANDINGPAD record");
2427 bool IsCleanup = !!Record[Idx++];
2428 unsigned NumClauses = Record[Idx++];
2429 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
2430 LP->setCleanup(IsCleanup);
2431 for (unsigned J = 0; J != NumClauses; ++J) {
2432 LandingPadInst::ClauseType CT =
2433 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
2436 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
2438 return Error("Invalid LANDINGPAD record");
2441 assert((CT != LandingPadInst::Catch ||
2442 !isa<ArrayType>(Val->getType())) &&
2443 "Catch clause has a invalid type!");
2444 assert((CT != LandingPadInst::Filter ||
2445 isa<ArrayType>(Val->getType())) &&
2446 "Filter clause has invalid type!");
2451 InstructionList.push_back(I);
2455 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2456 if (Record.size() != 4)
2457 return Error("Invalid ALLOCA record");
2459 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2460 Type *OpTy = getTypeByID(Record[1]);
2461 Value *Size = getFnValueByID(Record[2], OpTy);
2462 unsigned Align = Record[3];
2463 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2464 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2465 InstructionList.push_back(I);
2468 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2471 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2472 OpNum+2 != Record.size())
2473 return Error("Invalid LOAD record");
2475 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2476 InstructionList.push_back(I);
2479 case bitc::FUNC_CODE_INST_LOADATOMIC: {
2480 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
2483 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2484 OpNum+4 != Record.size())
2485 return Error("Invalid LOADATOMIC record");
2488 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2489 if (Ordering == NotAtomic || Ordering == Release ||
2490 Ordering == AcquireRelease)
2491 return Error("Invalid LOADATOMIC record");
2492 if (Ordering != NotAtomic && Record[OpNum] == 0)
2493 return Error("Invalid LOADATOMIC record");
2494 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2496 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2497 Ordering, SynchScope);
2498 InstructionList.push_back(I);
2501 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
2504 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2505 getValue(Record, OpNum,
2506 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2507 OpNum+2 != Record.size())
2508 return Error("Invalid STORE record");
2510 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2511 InstructionList.push_back(I);
2514 case bitc::FUNC_CODE_INST_STOREATOMIC: {
2515 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
2518 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2519 getValue(Record, OpNum,
2520 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2521 OpNum+4 != Record.size())
2522 return Error("Invalid STOREATOMIC record");
2524 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2525 if (Ordering == NotAtomic || Ordering == Acquire ||
2526 Ordering == AcquireRelease)
2527 return Error("Invalid STOREATOMIC record");
2528 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2529 if (Ordering != NotAtomic && Record[OpNum] == 0)
2530 return Error("Invalid STOREATOMIC record");
2532 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2533 Ordering, SynchScope);
2534 InstructionList.push_back(I);
2537 case bitc::FUNC_CODE_INST_CMPXCHG: {
2538 // CMPXCHG:[ptrty, ptr, cmp, new, vol, ordering, synchscope]
2540 Value *Ptr, *Cmp, *New;
2541 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2542 getValue(Record, OpNum,
2543 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
2544 getValue(Record, OpNum,
2545 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
2546 OpNum+3 != Record.size())
2547 return Error("Invalid CMPXCHG record");
2548 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+1]);
2549 if (Ordering == NotAtomic || Ordering == Unordered)
2550 return Error("Invalid CMPXCHG record");
2551 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
2552 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, SynchScope);
2553 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
2554 InstructionList.push_back(I);
2557 case bitc::FUNC_CODE_INST_ATOMICRMW: {
2558 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
2561 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2562 getValue(Record, OpNum,
2563 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2564 OpNum+4 != Record.size())
2565 return Error("Invalid ATOMICRMW record");
2566 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
2567 if (Operation < AtomicRMWInst::FIRST_BINOP ||
2568 Operation > AtomicRMWInst::LAST_BINOP)
2569 return Error("Invalid ATOMICRMW record");
2570 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2571 if (Ordering == NotAtomic || Ordering == Unordered)
2572 return Error("Invalid ATOMICRMW record");
2573 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2574 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
2575 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
2576 InstructionList.push_back(I);
2579 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
2580 if (2 != Record.size())
2581 return Error("Invalid FENCE record");
2582 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
2583 if (Ordering == NotAtomic || Ordering == Unordered ||
2584 Ordering == Monotonic)
2585 return Error("Invalid FENCE record");
2586 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
2587 I = new FenceInst(Context, Ordering, SynchScope);
2588 InstructionList.push_back(I);
2591 case bitc::FUNC_CODE_INST_CALL: {
2592 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2593 if (Record.size() < 3)
2594 return Error("Invalid CALL record");
2596 AttrListPtr PAL = getAttributes(Record[0]);
2597 unsigned CCInfo = Record[1];
2601 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2602 return Error("Invalid CALL record");
2604 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2605 FunctionType *FTy = 0;
2606 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2607 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2608 return Error("Invalid CALL record");
2610 SmallVector<Value*, 16> Args;
2611 // Read the fixed params.
2612 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2613 if (FTy->getParamType(i)->isLabelTy())
2614 Args.push_back(getBasicBlock(Record[OpNum]));
2616 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2617 if (Args.back() == 0) return Error("Invalid CALL record");
2620 // Read type/value pairs for varargs params.
2621 if (!FTy->isVarArg()) {
2622 if (OpNum != Record.size())
2623 return Error("Invalid CALL record");
2625 while (OpNum != Record.size()) {
2627 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2628 return Error("Invalid CALL record");
2633 I = CallInst::Create(Callee, Args);
2634 InstructionList.push_back(I);
2635 cast<CallInst>(I)->setCallingConv(
2636 static_cast<CallingConv::ID>(CCInfo>>1));
2637 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2638 cast<CallInst>(I)->setAttributes(PAL);
2641 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2642 if (Record.size() < 3)
2643 return Error("Invalid VAARG record");
2644 Type *OpTy = getTypeByID(Record[0]);
2645 Value *Op = getFnValueByID(Record[1], OpTy);
2646 Type *ResTy = getTypeByID(Record[2]);
2647 if (!OpTy || !Op || !ResTy)
2648 return Error("Invalid VAARG record");
2649 I = new VAArgInst(Op, ResTy);
2650 InstructionList.push_back(I);
2655 // Add instruction to end of current BB. If there is no current BB, reject
2659 return Error("Invalid instruction with no BB");
2661 CurBB->getInstList().push_back(I);
2663 // If this was a terminator instruction, move to the next block.
2664 if (isa<TerminatorInst>(I)) {
2666 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2669 // Non-void values get registered in the value table for future use.
2670 if (I && !I->getType()->isVoidTy())
2671 ValueList.AssignValue(I, NextValueNo++);
2674 // Check the function list for unresolved values.
2675 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2676 if (A->getParent() == 0) {
2677 // We found at least one unresolved value. Nuke them all to avoid leaks.
2678 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2679 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2680 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2684 return Error("Never resolved value found in function!");
2688 // FIXME: Check for unresolved forward-declared metadata references
2689 // and clean up leaks.
2691 // See if anything took the address of blocks in this function. If so,
2692 // resolve them now.
2693 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2694 BlockAddrFwdRefs.find(F);
2695 if (BAFRI != BlockAddrFwdRefs.end()) {
2696 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2697 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2698 unsigned BlockIdx = RefList[i].first;
2699 if (BlockIdx >= FunctionBBs.size())
2700 return Error("Invalid blockaddress block #");
2702 GlobalVariable *FwdRef = RefList[i].second;
2703 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2704 FwdRef->eraseFromParent();
2707 BlockAddrFwdRefs.erase(BAFRI);
2710 // Trim the value list down to the size it was before we parsed this function.
2711 ValueList.shrinkTo(ModuleValueListSize);
2712 MDValueList.shrinkTo(ModuleMDValueListSize);
2713 std::vector<BasicBlock*>().swap(FunctionBBs);
2717 /// FindFunctionInStream - Find the function body in the bitcode stream
2718 bool BitcodeReader::FindFunctionInStream(Function *F,
2719 DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator) {
2720 while (DeferredFunctionInfoIterator->second == 0) {
2721 if (Stream.AtEndOfStream())
2722 return Error("Could not find Function in stream");
2723 // ParseModule will parse the next body in the stream and set its
2724 // position in the DeferredFunctionInfo map.
2725 if (ParseModule(true)) return true;
2730 //===----------------------------------------------------------------------===//
2731 // GVMaterializer implementation
2732 //===----------------------------------------------------------------------===//
2735 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2736 if (const Function *F = dyn_cast<Function>(GV)) {
2737 return F->isDeclaration() &&
2738 DeferredFunctionInfo.count(const_cast<Function*>(F));
2743 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2744 Function *F = dyn_cast<Function>(GV);
2745 // If it's not a function or is already material, ignore the request.
2746 if (!F || !F->isMaterializable()) return false;
2748 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2749 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2750 // If its position is recorded as 0, its body is somewhere in the stream
2751 // but we haven't seen it yet.
2752 if (DFII->second == 0)
2753 if (LazyStreamer && FindFunctionInStream(F, DFII)) return true;
2755 // Move the bit stream to the saved position of the deferred function body.
2756 Stream.JumpToBit(DFII->second);
2758 if (ParseFunctionBody(F)) {
2759 if (ErrInfo) *ErrInfo = ErrorString;
2763 // Upgrade any old intrinsic calls in the function.
2764 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2765 E = UpgradedIntrinsics.end(); I != E; ++I) {
2766 if (I->first != I->second) {
2767 for (Value::use_iterator UI = I->first->use_begin(),
2768 UE = I->first->use_end(); UI != UE; ) {
2769 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2770 UpgradeIntrinsicCall(CI, I->second);
2778 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2779 const Function *F = dyn_cast<Function>(GV);
2780 if (!F || F->isDeclaration())
2782 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2785 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2786 Function *F = dyn_cast<Function>(GV);
2787 // If this function isn't dematerializable, this is a noop.
2788 if (!F || !isDematerializable(F))
2791 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2793 // Just forget the function body, we can remat it later.
2798 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2799 assert(M == TheModule &&
2800 "Can only Materialize the Module this BitcodeReader is attached to.");
2801 // Iterate over the module, deserializing any functions that are still on
2803 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2805 if (F->isMaterializable() &&
2806 Materialize(F, ErrInfo))
2809 // At this point, if there are any function bodies, the current bit is
2810 // pointing to the END_BLOCK record after them. Now make sure the rest
2811 // of the bits in the module have been read.
2815 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2816 // delete the old functions to clean up. We can't do this unless the entire
2817 // module is materialized because there could always be another function body
2818 // with calls to the old function.
2819 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2820 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2821 if (I->first != I->second) {
2822 for (Value::use_iterator UI = I->first->use_begin(),
2823 UE = I->first->use_end(); UI != UE; ) {
2824 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2825 UpgradeIntrinsicCall(CI, I->second);
2827 if (!I->first->use_empty())
2828 I->first->replaceAllUsesWith(I->second);
2829 I->first->eraseFromParent();
2832 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2837 bool BitcodeReader::InitStream() {
2838 if (LazyStreamer) return InitLazyStream();
2839 return InitStreamFromBuffer();
2842 bool BitcodeReader::InitStreamFromBuffer() {
2843 const unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
2844 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
2846 if (Buffer->getBufferSize() & 3) {
2847 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
2848 return Error("Invalid bitcode signature");
2850 return Error("Bitcode stream should be a multiple of 4 bytes in length");
2853 // If we have a wrapper header, parse it and ignore the non-bc file contents.
2854 // The magic number is 0x0B17C0DE stored in little endian.
2855 if (isBitcodeWrapper(BufPtr, BufEnd))
2856 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
2857 return Error("Invalid bitcode wrapper header");
2859 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
2860 Stream.init(*StreamFile);
2865 bool BitcodeReader::InitLazyStream() {
2866 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
2868 StreamingMemoryObject *Bytes = new StreamingMemoryObject(LazyStreamer);
2869 StreamFile.reset(new BitstreamReader(Bytes));
2870 Stream.init(*StreamFile);
2872 unsigned char buf[16];
2873 if (Bytes->readBytes(0, 16, buf, NULL) == -1)
2874 return Error("Bitcode stream must be at least 16 bytes in length");
2876 if (!isBitcode(buf, buf + 16))
2877 return Error("Invalid bitcode signature");
2879 if (isBitcodeWrapper(buf, buf + 4)) {
2880 const unsigned char *bitcodeStart = buf;
2881 const unsigned char *bitcodeEnd = buf + 16;
2882 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
2883 Bytes->dropLeadingBytes(bitcodeStart - buf);
2884 Bytes->setKnownObjectSize(bitcodeEnd - bitcodeStart);
2889 //===----------------------------------------------------------------------===//
2890 // External interface
2891 //===----------------------------------------------------------------------===//
2893 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2895 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2896 LLVMContext& Context,
2897 std::string *ErrMsg) {
2898 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2899 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2900 M->setMaterializer(R);
2901 if (R->ParseBitcodeInto(M)) {
2903 *ErrMsg = R->getErrorString();
2905 delete M; // Also deletes R.
2908 // Have the BitcodeReader dtor delete 'Buffer'.
2909 R->setBufferOwned(true);
2911 R->materializeForwardReferencedFunctions();
2917 Module *llvm::getStreamedBitcodeModule(const std::string &name,
2918 DataStreamer *streamer,
2919 LLVMContext &Context,
2920 std::string *ErrMsg) {
2921 Module *M = new Module(name, Context);
2922 BitcodeReader *R = new BitcodeReader(streamer, Context);
2923 M->setMaterializer(R);
2924 if (R->ParseBitcodeInto(M)) {
2926 *ErrMsg = R->getErrorString();
2927 delete M; // Also deletes R.
2930 R->setBufferOwned(false); // no buffer to delete
2934 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2935 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2936 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2937 std::string *ErrMsg){
2938 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2941 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2942 // there was an error.
2943 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2945 // Read in the entire module, and destroy the BitcodeReader.
2946 if (M->MaterializeAllPermanently(ErrMsg)) {
2951 // TODO: Restore the use-lists to the in-memory state when the bitcode was
2952 // written. We must defer until the Module has been fully materialized.
2957 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
2958 LLVMContext& Context,
2959 std::string *ErrMsg) {
2960 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2961 // Don't let the BitcodeReader dtor delete 'Buffer'.
2962 R->setBufferOwned(false);
2964 std::string Triple("");
2965 if (R->ParseTriple(Triple))
2967 *ErrMsg = R->getErrorString();