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/ADT/SmallString.h"
17 #include "llvm/ADT/SmallVector.h"
18 #include "llvm/AutoUpgrade.h"
19 #include "llvm/Constants.h"
20 #include "llvm/DerivedTypes.h"
21 #include "llvm/InlineAsm.h"
22 #include "llvm/IntrinsicInst.h"
23 #include "llvm/Module.h"
24 #include "llvm/OperandTraits.h"
25 #include "llvm/Operator.h"
26 #include "llvm/Support/DataStream.h"
27 #include "llvm/Support/MathExtras.h"
28 #include "llvm/Support/MemoryBuffer.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<AttributeSet>().swap(MAttributes);
51 std::vector<BasicBlock*>().swap(FunctionBBs);
52 std::vector<Function*>().swap(FunctionsWithBodies);
53 DeferredFunctionInfo.clear();
56 assert(BlockAddrFwdRefs.empty() && "Unresolved blockaddress fwd references");
59 //===----------------------------------------------------------------------===//
60 // Helper functions to implement forward reference resolution, etc.
61 //===----------------------------------------------------------------------===//
63 /// ConvertToString - Convert a string from a record into an std::string, return
65 template<typename StrTy>
66 static bool ConvertToString(ArrayRef<uint64_t> Record, unsigned Idx,
68 if (Idx > Record.size())
71 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
72 Result += (char)Record[i];
76 static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
78 default: // Map unknown/new linkages to external
79 case 0: return GlobalValue::ExternalLinkage;
80 case 1: return GlobalValue::WeakAnyLinkage;
81 case 2: return GlobalValue::AppendingLinkage;
82 case 3: return GlobalValue::InternalLinkage;
83 case 4: return GlobalValue::LinkOnceAnyLinkage;
84 case 5: return GlobalValue::DLLImportLinkage;
85 case 6: return GlobalValue::DLLExportLinkage;
86 case 7: return GlobalValue::ExternalWeakLinkage;
87 case 8: return GlobalValue::CommonLinkage;
88 case 9: return GlobalValue::PrivateLinkage;
89 case 10: return GlobalValue::WeakODRLinkage;
90 case 11: return GlobalValue::LinkOnceODRLinkage;
91 case 12: return GlobalValue::AvailableExternallyLinkage;
92 case 13: return GlobalValue::LinkerPrivateLinkage;
93 case 14: return GlobalValue::LinkerPrivateWeakLinkage;
94 case 15: return GlobalValue::LinkOnceODRAutoHideLinkage;
98 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
100 default: // Map unknown visibilities to default.
101 case 0: return GlobalValue::DefaultVisibility;
102 case 1: return GlobalValue::HiddenVisibility;
103 case 2: return GlobalValue::ProtectedVisibility;
107 static GlobalVariable::ThreadLocalMode GetDecodedThreadLocalMode(unsigned Val) {
109 case 0: return GlobalVariable::NotThreadLocal;
110 default: // Map unknown non-zero value to general dynamic.
111 case 1: return GlobalVariable::GeneralDynamicTLSModel;
112 case 2: return GlobalVariable::LocalDynamicTLSModel;
113 case 3: return GlobalVariable::InitialExecTLSModel;
114 case 4: return GlobalVariable::LocalExecTLSModel;
118 static int GetDecodedCastOpcode(unsigned Val) {
121 case bitc::CAST_TRUNC : return Instruction::Trunc;
122 case bitc::CAST_ZEXT : return Instruction::ZExt;
123 case bitc::CAST_SEXT : return Instruction::SExt;
124 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
125 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
126 case bitc::CAST_UITOFP : return Instruction::UIToFP;
127 case bitc::CAST_SITOFP : return Instruction::SIToFP;
128 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
129 case bitc::CAST_FPEXT : return Instruction::FPExt;
130 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
131 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
132 case bitc::CAST_BITCAST : return Instruction::BitCast;
135 static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
138 case bitc::BINOP_ADD:
139 return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
140 case bitc::BINOP_SUB:
141 return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
142 case bitc::BINOP_MUL:
143 return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
144 case bitc::BINOP_UDIV: return Instruction::UDiv;
145 case bitc::BINOP_SDIV:
146 return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
147 case bitc::BINOP_UREM: return Instruction::URem;
148 case bitc::BINOP_SREM:
149 return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
150 case bitc::BINOP_SHL: return Instruction::Shl;
151 case bitc::BINOP_LSHR: return Instruction::LShr;
152 case bitc::BINOP_ASHR: return Instruction::AShr;
153 case bitc::BINOP_AND: return Instruction::And;
154 case bitc::BINOP_OR: return Instruction::Or;
155 case bitc::BINOP_XOR: return Instruction::Xor;
159 static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
161 default: return AtomicRMWInst::BAD_BINOP;
162 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
163 case bitc::RMW_ADD: return AtomicRMWInst::Add;
164 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
165 case bitc::RMW_AND: return AtomicRMWInst::And;
166 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
167 case bitc::RMW_OR: return AtomicRMWInst::Or;
168 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
169 case bitc::RMW_MAX: return AtomicRMWInst::Max;
170 case bitc::RMW_MIN: return AtomicRMWInst::Min;
171 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
172 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
176 static AtomicOrdering GetDecodedOrdering(unsigned Val) {
178 case bitc::ORDERING_NOTATOMIC: return NotAtomic;
179 case bitc::ORDERING_UNORDERED: return Unordered;
180 case bitc::ORDERING_MONOTONIC: return Monotonic;
181 case bitc::ORDERING_ACQUIRE: return Acquire;
182 case bitc::ORDERING_RELEASE: return Release;
183 case bitc::ORDERING_ACQREL: return AcquireRelease;
184 default: // Map unknown orderings to sequentially-consistent.
185 case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
189 static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
191 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
192 default: // Map unknown scopes to cross-thread.
193 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
199 /// @brief A class for maintaining the slot number definition
200 /// as a placeholder for the actual definition for forward constants defs.
201 class ConstantPlaceHolder : public ConstantExpr {
202 void operator=(const ConstantPlaceHolder &) LLVM_DELETED_FUNCTION;
204 // allocate space for exactly one operand
205 void *operator new(size_t s) {
206 return User::operator new(s, 1);
208 explicit ConstantPlaceHolder(Type *Ty, LLVMContext& Context)
209 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
210 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
213 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
214 static bool classof(const Value *V) {
215 return isa<ConstantExpr>(V) &&
216 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
220 /// Provide fast operand accessors
221 //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
225 // FIXME: can we inherit this from ConstantExpr?
227 struct OperandTraits<ConstantPlaceHolder> :
228 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
233 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
242 WeakVH &OldV = ValuePtrs[Idx];
248 // Handle constants and non-constants (e.g. instrs) differently for
250 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
251 ResolveConstants.push_back(std::make_pair(PHC, Idx));
254 // If there was a forward reference to this value, replace it.
255 Value *PrevVal = OldV;
256 OldV->replaceAllUsesWith(V);
262 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
267 if (Value *V = ValuePtrs[Idx]) {
268 assert(Ty == V->getType() && "Type mismatch in constant table!");
269 return cast<Constant>(V);
272 // Create and return a placeholder, which will later be RAUW'd.
273 Constant *C = new ConstantPlaceHolder(Ty, Context);
278 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, Type *Ty) {
282 if (Value *V = ValuePtrs[Idx]) {
283 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
287 // No type specified, must be invalid reference.
288 if (Ty == 0) return 0;
290 // Create and return a placeholder, which will later be RAUW'd.
291 Value *V = new Argument(Ty);
296 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
297 /// resolves any forward references. The idea behind this is that we sometimes
298 /// get constants (such as large arrays) which reference *many* forward ref
299 /// constants. Replacing each of these causes a lot of thrashing when
300 /// building/reuniquing the constant. Instead of doing this, we look at all the
301 /// uses and rewrite all the place holders at once for any constant that uses
303 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
304 // Sort the values by-pointer so that they are efficient to look up with a
306 std::sort(ResolveConstants.begin(), ResolveConstants.end());
308 SmallVector<Constant*, 64> NewOps;
310 while (!ResolveConstants.empty()) {
311 Value *RealVal = operator[](ResolveConstants.back().second);
312 Constant *Placeholder = ResolveConstants.back().first;
313 ResolveConstants.pop_back();
315 // Loop over all users of the placeholder, updating them to reference the
316 // new value. If they reference more than one placeholder, update them all
318 while (!Placeholder->use_empty()) {
319 Value::use_iterator UI = Placeholder->use_begin();
322 // If the using object isn't uniqued, just update the operands. This
323 // handles instructions and initializers for global variables.
324 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
325 UI.getUse().set(RealVal);
329 // Otherwise, we have a constant that uses the placeholder. Replace that
330 // constant with a new constant that has *all* placeholder uses updated.
331 Constant *UserC = cast<Constant>(U);
332 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
335 if (!isa<ConstantPlaceHolder>(*I)) {
336 // Not a placeholder reference.
338 } else if (*I == Placeholder) {
339 // Common case is that it just references this one placeholder.
342 // Otherwise, look up the placeholder in ResolveConstants.
343 ResolveConstantsTy::iterator It =
344 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
345 std::pair<Constant*, unsigned>(cast<Constant>(*I),
347 assert(It != ResolveConstants.end() && It->first == *I);
348 NewOp = operator[](It->second);
351 NewOps.push_back(cast<Constant>(NewOp));
354 // Make the new constant.
356 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
357 NewC = ConstantArray::get(UserCA->getType(), NewOps);
358 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
359 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
360 } else if (isa<ConstantVector>(UserC)) {
361 NewC = ConstantVector::get(NewOps);
363 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
364 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
367 UserC->replaceAllUsesWith(NewC);
368 UserC->destroyConstant();
372 // Update all ValueHandles, they should be the only users at this point.
373 Placeholder->replaceAllUsesWith(RealVal);
378 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
387 WeakVH &OldV = MDValuePtrs[Idx];
393 // If there was a forward reference to this value, replace it.
394 MDNode *PrevVal = cast<MDNode>(OldV);
395 OldV->replaceAllUsesWith(V);
396 MDNode::deleteTemporary(PrevVal);
397 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
399 MDValuePtrs[Idx] = V;
402 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
406 if (Value *V = MDValuePtrs[Idx]) {
407 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
411 // Create and return a placeholder, which will later be RAUW'd.
412 Value *V = MDNode::getTemporary(Context, ArrayRef<Value*>());
413 MDValuePtrs[Idx] = V;
417 Type *BitcodeReader::getTypeByID(unsigned ID) {
418 // The type table size is always specified correctly.
419 if (ID >= TypeList.size())
422 if (Type *Ty = TypeList[ID])
425 // If we have a forward reference, the only possible case is when it is to a
426 // named struct. Just create a placeholder for now.
427 return TypeList[ID] = StructType::create(Context);
431 //===----------------------------------------------------------------------===//
432 // Functions for parsing blocks from the bitcode file
433 //===----------------------------------------------------------------------===//
435 bool BitcodeReader::ParseAttributeBlock() {
436 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
437 return Error("Malformed block record");
439 if (!MAttributes.empty())
440 return Error("Multiple PARAMATTR blocks found!");
442 SmallVector<uint64_t, 64> Record;
444 SmallVector<AttributeWithIndex, 8> Attrs;
446 // Read all the records.
448 unsigned Code = Stream.ReadCode();
449 if (Code == bitc::END_BLOCK) {
450 if (Stream.ReadBlockEnd())
451 return Error("Error at end of PARAMATTR block");
455 if (Code == bitc::ENTER_SUBBLOCK) {
456 // No known subblocks, always skip them.
457 Stream.ReadSubBlockID();
458 if (Stream.SkipBlock())
459 return Error("Malformed block record");
463 if (Code == bitc::DEFINE_ABBREV) {
464 Stream.ReadAbbrevRecord();
470 switch (Stream.ReadRecord(Code, Record)) {
471 default: // Default behavior: ignore.
473 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
474 if (Record.size() & 1)
475 return Error("Invalid ENTRY record");
477 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
478 Attribute ReconstitutedAttr =
479 Attribute::decodeLLVMAttributesForBitcode(Context, Record[i+1]);
480 Record[i+1] = ReconstitutedAttr.getBitMask();
483 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
484 AttrBuilder B(Record[i+1]);
485 if (B.hasAttributes())
486 Attrs.push_back(AttributeWithIndex::get(Record[i],
487 Attribute::get(Context, B)));
490 MAttributes.push_back(AttributeSet::get(Context, Attrs));
498 bool BitcodeReader::ParseTypeTable() {
499 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
500 return Error("Malformed block record");
502 return ParseTypeTableBody();
505 bool BitcodeReader::ParseTypeTableBody() {
506 if (!TypeList.empty())
507 return Error("Multiple TYPE_BLOCKs found!");
509 SmallVector<uint64_t, 64> Record;
510 unsigned NumRecords = 0;
512 SmallString<64> TypeName;
514 // Read all the records for this type table.
516 unsigned Code = Stream.ReadCode();
517 if (Code == bitc::END_BLOCK) {
518 if (NumRecords != TypeList.size())
519 return Error("Invalid type forward reference in TYPE_BLOCK");
520 if (Stream.ReadBlockEnd())
521 return Error("Error at end of type table block");
525 if (Code == bitc::ENTER_SUBBLOCK) {
526 // No known subblocks, always skip them.
527 Stream.ReadSubBlockID();
528 if (Stream.SkipBlock())
529 return Error("Malformed block record");
533 if (Code == bitc::DEFINE_ABBREV) {
534 Stream.ReadAbbrevRecord();
541 switch (Stream.ReadRecord(Code, Record)) {
542 default: return Error("unknown type in type table");
543 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
544 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
545 // type list. This allows us to reserve space.
546 if (Record.size() < 1)
547 return Error("Invalid TYPE_CODE_NUMENTRY record");
548 TypeList.resize(Record[0]);
550 case bitc::TYPE_CODE_VOID: // VOID
551 ResultTy = Type::getVoidTy(Context);
553 case bitc::TYPE_CODE_HALF: // HALF
554 ResultTy = Type::getHalfTy(Context);
556 case bitc::TYPE_CODE_FLOAT: // FLOAT
557 ResultTy = Type::getFloatTy(Context);
559 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
560 ResultTy = Type::getDoubleTy(Context);
562 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
563 ResultTy = Type::getX86_FP80Ty(Context);
565 case bitc::TYPE_CODE_FP128: // FP128
566 ResultTy = Type::getFP128Ty(Context);
568 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
569 ResultTy = Type::getPPC_FP128Ty(Context);
571 case bitc::TYPE_CODE_LABEL: // LABEL
572 ResultTy = Type::getLabelTy(Context);
574 case bitc::TYPE_CODE_METADATA: // METADATA
575 ResultTy = Type::getMetadataTy(Context);
577 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
578 ResultTy = Type::getX86_MMXTy(Context);
580 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
581 if (Record.size() < 1)
582 return Error("Invalid Integer type record");
584 ResultTy = IntegerType::get(Context, Record[0]);
586 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
587 // [pointee type, address space]
588 if (Record.size() < 1)
589 return Error("Invalid POINTER type record");
590 unsigned AddressSpace = 0;
591 if (Record.size() == 2)
592 AddressSpace = Record[1];
593 ResultTy = getTypeByID(Record[0]);
594 if (ResultTy == 0) return Error("invalid element type in pointer type");
595 ResultTy = PointerType::get(ResultTy, AddressSpace);
598 case bitc::TYPE_CODE_FUNCTION_OLD: {
599 // FIXME: attrid is dead, remove it in LLVM 4.0
600 // FUNCTION: [vararg, attrid, retty, paramty x N]
601 if (Record.size() < 3)
602 return Error("Invalid FUNCTION type record");
603 SmallVector<Type*, 8> ArgTys;
604 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
605 if (Type *T = getTypeByID(Record[i]))
611 ResultTy = getTypeByID(Record[2]);
612 if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
613 return Error("invalid type in function type");
615 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
618 case bitc::TYPE_CODE_FUNCTION: {
619 // FUNCTION: [vararg, retty, paramty x N]
620 if (Record.size() < 2)
621 return Error("Invalid FUNCTION type record");
622 SmallVector<Type*, 8> ArgTys;
623 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
624 if (Type *T = getTypeByID(Record[i]))
630 ResultTy = getTypeByID(Record[1]);
631 if (ResultTy == 0 || ArgTys.size() < Record.size()-2)
632 return Error("invalid type in function type");
634 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
637 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
638 if (Record.size() < 1)
639 return Error("Invalid STRUCT type record");
640 SmallVector<Type*, 8> EltTys;
641 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
642 if (Type *T = getTypeByID(Record[i]))
647 if (EltTys.size() != Record.size()-1)
648 return Error("invalid type in struct type");
649 ResultTy = StructType::get(Context, EltTys, Record[0]);
652 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
653 if (ConvertToString(Record, 0, TypeName))
654 return Error("Invalid STRUCT_NAME record");
657 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
658 if (Record.size() < 1)
659 return Error("Invalid STRUCT type record");
661 if (NumRecords >= TypeList.size())
662 return Error("invalid TYPE table");
664 // Check to see if this was forward referenced, if so fill in the temp.
665 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
667 Res->setName(TypeName);
668 TypeList[NumRecords] = 0;
669 } else // Otherwise, create a new struct.
670 Res = StructType::create(Context, TypeName);
673 SmallVector<Type*, 8> EltTys;
674 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
675 if (Type *T = getTypeByID(Record[i]))
680 if (EltTys.size() != Record.size()-1)
681 return Error("invalid STRUCT type record");
682 Res->setBody(EltTys, Record[0]);
686 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
687 if (Record.size() != 1)
688 return Error("Invalid OPAQUE type record");
690 if (NumRecords >= TypeList.size())
691 return Error("invalid TYPE table");
693 // Check to see if this was forward referenced, if so fill in the temp.
694 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
696 Res->setName(TypeName);
697 TypeList[NumRecords] = 0;
698 } else // Otherwise, create a new struct with no body.
699 Res = StructType::create(Context, TypeName);
704 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
705 if (Record.size() < 2)
706 return Error("Invalid ARRAY type record");
707 if ((ResultTy = getTypeByID(Record[1])))
708 ResultTy = ArrayType::get(ResultTy, Record[0]);
710 return Error("Invalid ARRAY type element");
712 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
713 if (Record.size() < 2)
714 return Error("Invalid VECTOR type record");
715 if ((ResultTy = getTypeByID(Record[1])))
716 ResultTy = VectorType::get(ResultTy, Record[0]);
718 return Error("Invalid ARRAY type element");
722 if (NumRecords >= TypeList.size())
723 return Error("invalid TYPE table");
724 assert(ResultTy && "Didn't read a type?");
725 assert(TypeList[NumRecords] == 0 && "Already read type?");
726 TypeList[NumRecords++] = ResultTy;
730 bool BitcodeReader::ParseValueSymbolTable() {
731 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
732 return Error("Malformed block record");
734 SmallVector<uint64_t, 64> Record;
736 // Read all the records for this value table.
737 SmallString<128> ValueName;
739 unsigned Code = Stream.ReadCode();
740 if (Code == bitc::END_BLOCK) {
741 if (Stream.ReadBlockEnd())
742 return Error("Error at end of value symbol table block");
745 if (Code == bitc::ENTER_SUBBLOCK) {
746 // No known subblocks, always skip them.
747 Stream.ReadSubBlockID();
748 if (Stream.SkipBlock())
749 return Error("Malformed block record");
753 if (Code == bitc::DEFINE_ABBREV) {
754 Stream.ReadAbbrevRecord();
760 switch (Stream.ReadRecord(Code, Record)) {
761 default: // Default behavior: unknown type.
763 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
764 if (ConvertToString(Record, 1, ValueName))
765 return Error("Invalid VST_ENTRY record");
766 unsigned ValueID = Record[0];
767 if (ValueID >= ValueList.size())
768 return Error("Invalid Value ID in VST_ENTRY record");
769 Value *V = ValueList[ValueID];
771 V->setName(StringRef(ValueName.data(), ValueName.size()));
775 case bitc::VST_CODE_BBENTRY: {
776 if (ConvertToString(Record, 1, ValueName))
777 return Error("Invalid VST_BBENTRY record");
778 BasicBlock *BB = getBasicBlock(Record[0]);
780 return Error("Invalid BB ID in VST_BBENTRY record");
782 BB->setName(StringRef(ValueName.data(), ValueName.size()));
790 bool BitcodeReader::ParseMetadata() {
791 unsigned NextMDValueNo = MDValueList.size();
793 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
794 return Error("Malformed block record");
796 SmallVector<uint64_t, 64> Record;
798 // Read all the records.
800 unsigned Code = Stream.ReadCode();
801 if (Code == bitc::END_BLOCK) {
802 if (Stream.ReadBlockEnd())
803 return Error("Error at end of PARAMATTR block");
807 if (Code == bitc::ENTER_SUBBLOCK) {
808 // No known subblocks, always skip them.
809 Stream.ReadSubBlockID();
810 if (Stream.SkipBlock())
811 return Error("Malformed block record");
815 if (Code == bitc::DEFINE_ABBREV) {
816 Stream.ReadAbbrevRecord();
820 bool IsFunctionLocal = false;
823 Code = Stream.ReadRecord(Code, Record);
825 default: // Default behavior: ignore.
827 case bitc::METADATA_NAME: {
828 // Read named of the named metadata.
829 SmallString<8> Name(Record.begin(), Record.end());
831 Code = Stream.ReadCode();
833 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
834 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
835 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
837 // Read named metadata elements.
838 unsigned Size = Record.size();
839 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
840 for (unsigned i = 0; i != Size; ++i) {
841 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
843 return Error("Malformed metadata record");
848 case bitc::METADATA_FN_NODE:
849 IsFunctionLocal = true;
851 case bitc::METADATA_NODE: {
852 if (Record.size() % 2 == 1)
853 return Error("Invalid METADATA_NODE record");
855 unsigned Size = Record.size();
856 SmallVector<Value*, 8> Elts;
857 for (unsigned i = 0; i != Size; i += 2) {
858 Type *Ty = getTypeByID(Record[i]);
859 if (!Ty) return Error("Invalid METADATA_NODE record");
860 if (Ty->isMetadataTy())
861 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
862 else if (!Ty->isVoidTy())
863 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
865 Elts.push_back(NULL);
867 Value *V = MDNode::getWhenValsUnresolved(Context, Elts, IsFunctionLocal);
868 IsFunctionLocal = false;
869 MDValueList.AssignValue(V, NextMDValueNo++);
872 case bitc::METADATA_STRING: {
873 SmallString<8> String(Record.begin(), Record.end());
874 Value *V = MDString::get(Context, String);
875 MDValueList.AssignValue(V, NextMDValueNo++);
878 case bitc::METADATA_KIND: {
879 if (Record.size() < 2)
880 return Error("Invalid METADATA_KIND record");
882 unsigned Kind = Record[0];
883 SmallString<8> Name(Record.begin()+1, Record.end());
885 unsigned NewKind = TheModule->getMDKindID(Name.str());
886 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
887 return Error("Conflicting METADATA_KIND records");
894 /// decodeSignRotatedValue - Decode a signed value stored with the sign bit in
895 /// the LSB for dense VBR encoding.
896 uint64_t BitcodeReader::decodeSignRotatedValue(uint64_t V) {
901 // There is no such thing as -0 with integers. "-0" really means MININT.
905 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
906 /// values and aliases that we can.
907 bool BitcodeReader::ResolveGlobalAndAliasInits() {
908 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
909 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
911 GlobalInitWorklist.swap(GlobalInits);
912 AliasInitWorklist.swap(AliasInits);
914 while (!GlobalInitWorklist.empty()) {
915 unsigned ValID = GlobalInitWorklist.back().second;
916 if (ValID >= ValueList.size()) {
917 // Not ready to resolve this yet, it requires something later in the file.
918 GlobalInits.push_back(GlobalInitWorklist.back());
920 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
921 GlobalInitWorklist.back().first->setInitializer(C);
923 return Error("Global variable initializer is not a constant!");
925 GlobalInitWorklist.pop_back();
928 while (!AliasInitWorklist.empty()) {
929 unsigned ValID = AliasInitWorklist.back().second;
930 if (ValID >= ValueList.size()) {
931 AliasInits.push_back(AliasInitWorklist.back());
933 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
934 AliasInitWorklist.back().first->setAliasee(C);
936 return Error("Alias initializer is not a constant!");
938 AliasInitWorklist.pop_back();
943 static APInt ReadWideAPInt(ArrayRef<uint64_t> Vals, unsigned TypeBits) {
944 SmallVector<uint64_t, 8> Words(Vals.size());
945 std::transform(Vals.begin(), Vals.end(), Words.begin(),
946 BitcodeReader::decodeSignRotatedValue);
948 return APInt(TypeBits, Words);
951 bool BitcodeReader::ParseConstants() {
952 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
953 return Error("Malformed block record");
955 SmallVector<uint64_t, 64> Record;
957 // Read all the records for this value table.
958 Type *CurTy = Type::getInt32Ty(Context);
959 unsigned NextCstNo = ValueList.size();
961 unsigned Code = Stream.ReadCode();
962 if (Code == bitc::END_BLOCK)
965 if (Code == bitc::ENTER_SUBBLOCK) {
966 // No known subblocks, always skip them.
967 Stream.ReadSubBlockID();
968 if (Stream.SkipBlock())
969 return Error("Malformed block record");
973 if (Code == bitc::DEFINE_ABBREV) {
974 Stream.ReadAbbrevRecord();
981 unsigned BitCode = Stream.ReadRecord(Code, Record);
983 default: // Default behavior: unknown constant
984 case bitc::CST_CODE_UNDEF: // UNDEF
985 V = UndefValue::get(CurTy);
987 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
989 return Error("Malformed CST_SETTYPE record");
990 if (Record[0] >= TypeList.size())
991 return Error("Invalid Type ID in CST_SETTYPE record");
992 CurTy = TypeList[Record[0]];
993 continue; // Skip the ValueList manipulation.
994 case bitc::CST_CODE_NULL: // NULL
995 V = Constant::getNullValue(CurTy);
997 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
998 if (!CurTy->isIntegerTy() || Record.empty())
999 return Error("Invalid CST_INTEGER record");
1000 V = ConstantInt::get(CurTy, decodeSignRotatedValue(Record[0]));
1002 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
1003 if (!CurTy->isIntegerTy() || Record.empty())
1004 return Error("Invalid WIDE_INTEGER record");
1006 APInt VInt = ReadWideAPInt(Record,
1007 cast<IntegerType>(CurTy)->getBitWidth());
1008 V = ConstantInt::get(Context, VInt);
1012 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1014 return Error("Invalid FLOAT record");
1015 if (CurTy->isHalfTy())
1016 V = ConstantFP::get(Context, APFloat(APInt(16, (uint16_t)Record[0])));
1017 else if (CurTy->isFloatTy())
1018 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1019 else if (CurTy->isDoubleTy())
1020 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1021 else if (CurTy->isX86_FP80Ty()) {
1022 // Bits are not stored the same way as a normal i80 APInt, compensate.
1023 uint64_t Rearrange[2];
1024 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1025 Rearrange[1] = Record[0] >> 48;
1026 V = ConstantFP::get(Context, APFloat(APInt(80, Rearrange)));
1027 } else if (CurTy->isFP128Ty())
1028 V = ConstantFP::get(Context, APFloat(APInt(128, Record), true));
1029 else if (CurTy->isPPC_FP128Ty())
1030 V = ConstantFP::get(Context, APFloat(APInt(128, Record)));
1032 V = UndefValue::get(CurTy);
1036 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1038 return Error("Invalid CST_AGGREGATE record");
1040 unsigned Size = Record.size();
1041 SmallVector<Constant*, 16> Elts;
1043 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1044 for (unsigned i = 0; i != Size; ++i)
1045 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1046 STy->getElementType(i)));
1047 V = ConstantStruct::get(STy, Elts);
1048 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1049 Type *EltTy = ATy->getElementType();
1050 for (unsigned i = 0; i != Size; ++i)
1051 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1052 V = ConstantArray::get(ATy, Elts);
1053 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1054 Type *EltTy = VTy->getElementType();
1055 for (unsigned i = 0; i != Size; ++i)
1056 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1057 V = ConstantVector::get(Elts);
1059 V = UndefValue::get(CurTy);
1063 case bitc::CST_CODE_STRING: // STRING: [values]
1064 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1066 return Error("Invalid CST_STRING record");
1068 SmallString<16> Elts(Record.begin(), Record.end());
1069 V = ConstantDataArray::getString(Context, Elts,
1070 BitCode == bitc::CST_CODE_CSTRING);
1073 case bitc::CST_CODE_DATA: {// DATA: [n x value]
1075 return Error("Invalid CST_DATA record");
1077 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
1078 unsigned Size = Record.size();
1080 if (EltTy->isIntegerTy(8)) {
1081 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
1082 if (isa<VectorType>(CurTy))
1083 V = ConstantDataVector::get(Context, Elts);
1085 V = ConstantDataArray::get(Context, Elts);
1086 } else if (EltTy->isIntegerTy(16)) {
1087 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
1088 if (isa<VectorType>(CurTy))
1089 V = ConstantDataVector::get(Context, Elts);
1091 V = ConstantDataArray::get(Context, Elts);
1092 } else if (EltTy->isIntegerTy(32)) {
1093 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
1094 if (isa<VectorType>(CurTy))
1095 V = ConstantDataVector::get(Context, Elts);
1097 V = ConstantDataArray::get(Context, Elts);
1098 } else if (EltTy->isIntegerTy(64)) {
1099 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
1100 if (isa<VectorType>(CurTy))
1101 V = ConstantDataVector::get(Context, Elts);
1103 V = ConstantDataArray::get(Context, Elts);
1104 } else if (EltTy->isFloatTy()) {
1105 SmallVector<float, 16> Elts(Size);
1106 std::transform(Record.begin(), Record.end(), Elts.begin(), BitsToFloat);
1107 if (isa<VectorType>(CurTy))
1108 V = ConstantDataVector::get(Context, Elts);
1110 V = ConstantDataArray::get(Context, Elts);
1111 } else if (EltTy->isDoubleTy()) {
1112 SmallVector<double, 16> Elts(Size);
1113 std::transform(Record.begin(), Record.end(), Elts.begin(),
1115 if (isa<VectorType>(CurTy))
1116 V = ConstantDataVector::get(Context, Elts);
1118 V = ConstantDataArray::get(Context, Elts);
1120 return Error("Unknown element type in CE_DATA");
1125 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1126 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1127 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1129 V = UndefValue::get(CurTy); // Unknown binop.
1131 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1132 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1134 if (Record.size() >= 4) {
1135 if (Opc == Instruction::Add ||
1136 Opc == Instruction::Sub ||
1137 Opc == Instruction::Mul ||
1138 Opc == Instruction::Shl) {
1139 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1140 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1141 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1142 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1143 } else if (Opc == Instruction::SDiv ||
1144 Opc == Instruction::UDiv ||
1145 Opc == Instruction::LShr ||
1146 Opc == Instruction::AShr) {
1147 if (Record[3] & (1 << bitc::PEO_EXACT))
1148 Flags |= SDivOperator::IsExact;
1151 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1155 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1156 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1157 int Opc = GetDecodedCastOpcode(Record[0]);
1159 V = UndefValue::get(CurTy); // Unknown cast.
1161 Type *OpTy = getTypeByID(Record[1]);
1162 if (!OpTy) return Error("Invalid CE_CAST record");
1163 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1164 V = ConstantExpr::getCast(Opc, Op, CurTy);
1168 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1169 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1170 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1171 SmallVector<Constant*, 16> Elts;
1172 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1173 Type *ElTy = getTypeByID(Record[i]);
1174 if (!ElTy) return Error("Invalid CE_GEP record");
1175 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1177 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1178 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1180 bitc::CST_CODE_CE_INBOUNDS_GEP);
1183 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1184 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1185 V = ConstantExpr::getSelect(
1186 ValueList.getConstantFwdRef(Record[0],
1187 Type::getInt1Ty(Context)),
1188 ValueList.getConstantFwdRef(Record[1],CurTy),
1189 ValueList.getConstantFwdRef(Record[2],CurTy));
1191 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1192 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1194 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1195 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1196 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1197 Constant *Op1 = ValueList.getConstantFwdRef(Record[2],
1198 Type::getInt32Ty(Context));
1199 V = ConstantExpr::getExtractElement(Op0, Op1);
1202 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1203 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1204 if (Record.size() < 3 || OpTy == 0)
1205 return Error("Invalid CE_INSERTELT record");
1206 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1207 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1208 OpTy->getElementType());
1209 Constant *Op2 = ValueList.getConstantFwdRef(Record[2],
1210 Type::getInt32Ty(Context));
1211 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1214 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1215 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1216 if (Record.size() < 3 || OpTy == 0)
1217 return Error("Invalid CE_SHUFFLEVEC record");
1218 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1219 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1220 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1221 OpTy->getNumElements());
1222 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1223 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1226 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1227 VectorType *RTy = dyn_cast<VectorType>(CurTy);
1229 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1230 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1231 return Error("Invalid CE_SHUFVEC_EX record");
1232 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1233 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1234 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1235 RTy->getNumElements());
1236 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1237 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1240 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1241 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1242 Type *OpTy = getTypeByID(Record[0]);
1243 if (OpTy == 0) return Error("Invalid CE_CMP record");
1244 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1245 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1247 if (OpTy->isFPOrFPVectorTy())
1248 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1250 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1253 // This maintains backward compatibility, pre-asm dialect keywords.
1254 // FIXME: Remove with the 4.0 release.
1255 case bitc::CST_CODE_INLINEASM_OLD: {
1256 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1257 std::string AsmStr, ConstrStr;
1258 bool HasSideEffects = Record[0] & 1;
1259 bool IsAlignStack = Record[0] >> 1;
1260 unsigned AsmStrSize = Record[1];
1261 if (2+AsmStrSize >= Record.size())
1262 return Error("Invalid INLINEASM record");
1263 unsigned ConstStrSize = Record[2+AsmStrSize];
1264 if (3+AsmStrSize+ConstStrSize > Record.size())
1265 return Error("Invalid INLINEASM record");
1267 for (unsigned i = 0; i != AsmStrSize; ++i)
1268 AsmStr += (char)Record[2+i];
1269 for (unsigned i = 0; i != ConstStrSize; ++i)
1270 ConstrStr += (char)Record[3+AsmStrSize+i];
1271 PointerType *PTy = cast<PointerType>(CurTy);
1272 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1273 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1276 // This version adds support for the asm dialect keywords (e.g.,
1278 case bitc::CST_CODE_INLINEASM: {
1279 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1280 std::string AsmStr, ConstrStr;
1281 bool HasSideEffects = Record[0] & 1;
1282 bool IsAlignStack = (Record[0] >> 1) & 1;
1283 unsigned AsmDialect = Record[0] >> 2;
1284 unsigned AsmStrSize = Record[1];
1285 if (2+AsmStrSize >= Record.size())
1286 return Error("Invalid INLINEASM record");
1287 unsigned ConstStrSize = Record[2+AsmStrSize];
1288 if (3+AsmStrSize+ConstStrSize > Record.size())
1289 return Error("Invalid INLINEASM record");
1291 for (unsigned i = 0; i != AsmStrSize; ++i)
1292 AsmStr += (char)Record[2+i];
1293 for (unsigned i = 0; i != ConstStrSize; ++i)
1294 ConstrStr += (char)Record[3+AsmStrSize+i];
1295 PointerType *PTy = cast<PointerType>(CurTy);
1296 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1297 AsmStr, ConstrStr, HasSideEffects, IsAlignStack,
1298 InlineAsm::AsmDialect(AsmDialect));
1301 case bitc::CST_CODE_BLOCKADDRESS:{
1302 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1303 Type *FnTy = getTypeByID(Record[0]);
1304 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1306 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1307 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1309 // If the function is already parsed we can insert the block address right
1312 Function::iterator BBI = Fn->begin(), BBE = Fn->end();
1313 for (size_t I = 0, E = Record[2]; I != E; ++I) {
1315 return Error("Invalid blockaddress block #");
1318 V = BlockAddress::get(Fn, BBI);
1320 // Otherwise insert a placeholder and remember it so it can be inserted
1321 // when the function is parsed.
1322 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1323 Type::getInt8Ty(Context),
1324 false, GlobalValue::InternalLinkage,
1326 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1333 ValueList.AssignValue(V, NextCstNo);
1337 if (NextCstNo != ValueList.size())
1338 return Error("Invalid constant reference!");
1340 if (Stream.ReadBlockEnd())
1341 return Error("Error at end of constants block");
1343 // Once all the constants have been read, go through and resolve forward
1345 ValueList.ResolveConstantForwardRefs();
1349 bool BitcodeReader::ParseUseLists() {
1350 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
1351 return Error("Malformed block record");
1353 SmallVector<uint64_t, 64> Record;
1355 // Read all the records.
1357 unsigned Code = Stream.ReadCode();
1358 if (Code == bitc::END_BLOCK) {
1359 if (Stream.ReadBlockEnd())
1360 return Error("Error at end of use-list table block");
1364 if (Code == bitc::ENTER_SUBBLOCK) {
1365 // No known subblocks, always skip them.
1366 Stream.ReadSubBlockID();
1367 if (Stream.SkipBlock())
1368 return Error("Malformed block record");
1372 if (Code == bitc::DEFINE_ABBREV) {
1373 Stream.ReadAbbrevRecord();
1377 // Read a use list record.
1379 switch (Stream.ReadRecord(Code, Record)) {
1380 default: // Default behavior: unknown type.
1382 case bitc::USELIST_CODE_ENTRY: { // USELIST_CODE_ENTRY: TBD.
1383 unsigned RecordLength = Record.size();
1384 if (RecordLength < 1)
1385 return Error ("Invalid UseList reader!");
1386 UseListRecords.push_back(Record);
1393 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1394 /// remember where it is and then skip it. This lets us lazily deserialize the
1396 bool BitcodeReader::RememberAndSkipFunctionBody() {
1397 // Get the function we are talking about.
1398 if (FunctionsWithBodies.empty())
1399 return Error("Insufficient function protos");
1401 Function *Fn = FunctionsWithBodies.back();
1402 FunctionsWithBodies.pop_back();
1404 // Save the current stream state.
1405 uint64_t CurBit = Stream.GetCurrentBitNo();
1406 DeferredFunctionInfo[Fn] = CurBit;
1408 // Skip over the function block for now.
1409 if (Stream.SkipBlock())
1410 return Error("Malformed block record");
1414 bool BitcodeReader::GlobalCleanup() {
1415 // Patch the initializers for globals and aliases up.
1416 ResolveGlobalAndAliasInits();
1417 if (!GlobalInits.empty() || !AliasInits.empty())
1418 return Error("Malformed global initializer set");
1420 // Look for intrinsic functions which need to be upgraded at some point
1421 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1424 if (UpgradeIntrinsicFunction(FI, NewFn))
1425 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1428 // Look for global variables which need to be renamed.
1429 for (Module::global_iterator
1430 GI = TheModule->global_begin(), GE = TheModule->global_end();
1432 UpgradeGlobalVariable(GI);
1433 // Force deallocation of memory for these vectors to favor the client that
1434 // want lazy deserialization.
1435 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1436 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1440 bool BitcodeReader::ParseModule(bool Resume) {
1442 Stream.JumpToBit(NextUnreadBit);
1443 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1444 return Error("Malformed block record");
1446 SmallVector<uint64_t, 64> Record;
1447 std::vector<std::string> SectionTable;
1448 std::vector<std::string> GCTable;
1450 // Read all the records for this module.
1451 while (!Stream.AtEndOfStream()) {
1452 unsigned Code = Stream.ReadCode();
1453 if (Code == bitc::END_BLOCK) {
1454 if (Stream.ReadBlockEnd())
1455 return Error("Error at end of module block");
1457 return GlobalCleanup();
1460 if (Code == bitc::ENTER_SUBBLOCK) {
1461 switch (Stream.ReadSubBlockID()) {
1462 default: // Skip unknown content.
1463 if (Stream.SkipBlock())
1464 return Error("Malformed block record");
1466 case bitc::BLOCKINFO_BLOCK_ID:
1467 if (Stream.ReadBlockInfoBlock())
1468 return Error("Malformed BlockInfoBlock");
1470 case bitc::PARAMATTR_BLOCK_ID:
1471 if (ParseAttributeBlock())
1474 case bitc::TYPE_BLOCK_ID_NEW:
1475 if (ParseTypeTable())
1478 case bitc::VALUE_SYMTAB_BLOCK_ID:
1479 if (ParseValueSymbolTable())
1481 SeenValueSymbolTable = true;
1483 case bitc::CONSTANTS_BLOCK_ID:
1484 if (ParseConstants() || ResolveGlobalAndAliasInits())
1487 case bitc::METADATA_BLOCK_ID:
1488 if (ParseMetadata())
1491 case bitc::FUNCTION_BLOCK_ID:
1492 // If this is the first function body we've seen, reverse the
1493 // FunctionsWithBodies list.
1494 if (!SeenFirstFunctionBody) {
1495 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1496 if (GlobalCleanup())
1498 SeenFirstFunctionBody = true;
1501 if (RememberAndSkipFunctionBody())
1503 // For streaming bitcode, suspend parsing when we reach the function
1504 // bodies. Subsequent materialization calls will resume it when
1505 // necessary. For streaming, the function bodies must be at the end of
1506 // the bitcode. If the bitcode file is old, the symbol table will be
1507 // at the end instead and will not have been seen yet. In this case,
1508 // just finish the parse now.
1509 if (LazyStreamer && SeenValueSymbolTable) {
1510 NextUnreadBit = Stream.GetCurrentBitNo();
1514 case bitc::USELIST_BLOCK_ID:
1515 if (ParseUseLists())
1522 if (Code == bitc::DEFINE_ABBREV) {
1523 Stream.ReadAbbrevRecord();
1528 switch (Stream.ReadRecord(Code, Record)) {
1529 default: break; // Default behavior, ignore unknown content.
1530 case bitc::MODULE_CODE_VERSION: { // VERSION: [version#]
1531 if (Record.size() < 1)
1532 return Error("Malformed MODULE_CODE_VERSION");
1533 // Only version #0 and #1 are supported so far.
1534 unsigned module_version = Record[0];
1535 switch (module_version) {
1536 default: return Error("Unknown bitstream version!");
1538 UseRelativeIDs = false;
1541 UseRelativeIDs = true;
1546 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1548 if (ConvertToString(Record, 0, S))
1549 return Error("Invalid MODULE_CODE_TRIPLE record");
1550 TheModule->setTargetTriple(S);
1553 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1555 if (ConvertToString(Record, 0, S))
1556 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1557 TheModule->setDataLayout(S);
1560 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1562 if (ConvertToString(Record, 0, S))
1563 return Error("Invalid MODULE_CODE_ASM record");
1564 TheModule->setModuleInlineAsm(S);
1567 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1568 // FIXME: Remove in 4.0.
1570 if (ConvertToString(Record, 0, S))
1571 return Error("Invalid MODULE_CODE_DEPLIB record");
1575 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1577 if (ConvertToString(Record, 0, S))
1578 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1579 SectionTable.push_back(S);
1582 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1584 if (ConvertToString(Record, 0, S))
1585 return Error("Invalid MODULE_CODE_GCNAME record");
1586 GCTable.push_back(S);
1589 // GLOBALVAR: [pointer type, isconst, initid,
1590 // linkage, alignment, section, visibility, threadlocal,
1592 case bitc::MODULE_CODE_GLOBALVAR: {
1593 if (Record.size() < 6)
1594 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1595 Type *Ty = getTypeByID(Record[0]);
1596 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1597 if (!Ty->isPointerTy())
1598 return Error("Global not a pointer type!");
1599 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1600 Ty = cast<PointerType>(Ty)->getElementType();
1602 bool isConstant = Record[1];
1603 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1604 unsigned Alignment = (1 << Record[4]) >> 1;
1605 std::string Section;
1607 if (Record[5]-1 >= SectionTable.size())
1608 return Error("Invalid section ID");
1609 Section = SectionTable[Record[5]-1];
1611 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1612 if (Record.size() > 6)
1613 Visibility = GetDecodedVisibility(Record[6]);
1615 GlobalVariable::ThreadLocalMode TLM = GlobalVariable::NotThreadLocal;
1616 if (Record.size() > 7)
1617 TLM = GetDecodedThreadLocalMode(Record[7]);
1619 bool UnnamedAddr = false;
1620 if (Record.size() > 8)
1621 UnnamedAddr = Record[8];
1623 GlobalVariable *NewGV =
1624 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1626 NewGV->setAlignment(Alignment);
1627 if (!Section.empty())
1628 NewGV->setSection(Section);
1629 NewGV->setVisibility(Visibility);
1630 NewGV->setUnnamedAddr(UnnamedAddr);
1632 ValueList.push_back(NewGV);
1634 // Remember which value to use for the global initializer.
1635 if (unsigned InitID = Record[2])
1636 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1639 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1640 // alignment, section, visibility, gc, unnamed_addr]
1641 case bitc::MODULE_CODE_FUNCTION: {
1642 if (Record.size() < 8)
1643 return Error("Invalid MODULE_CODE_FUNCTION record");
1644 Type *Ty = getTypeByID(Record[0]);
1645 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1646 if (!Ty->isPointerTy())
1647 return Error("Function not a pointer type!");
1649 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1651 return Error("Function not a pointer to function type!");
1653 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1656 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1657 bool isProto = Record[2];
1658 Func->setLinkage(GetDecodedLinkage(Record[3]));
1659 Func->setAttributes(getAttributes(Record[4]));
1661 Func->setAlignment((1 << Record[5]) >> 1);
1663 if (Record[6]-1 >= SectionTable.size())
1664 return Error("Invalid section ID");
1665 Func->setSection(SectionTable[Record[6]-1]);
1667 Func->setVisibility(GetDecodedVisibility(Record[7]));
1668 if (Record.size() > 8 && Record[8]) {
1669 if (Record[8]-1 > GCTable.size())
1670 return Error("Invalid GC ID");
1671 Func->setGC(GCTable[Record[8]-1].c_str());
1673 bool UnnamedAddr = false;
1674 if (Record.size() > 9)
1675 UnnamedAddr = Record[9];
1676 Func->setUnnamedAddr(UnnamedAddr);
1677 ValueList.push_back(Func);
1679 // If this is a function with a body, remember the prototype we are
1680 // creating now, so that we can match up the body with them later.
1682 FunctionsWithBodies.push_back(Func);
1683 if (LazyStreamer) DeferredFunctionInfo[Func] = 0;
1687 // ALIAS: [alias type, aliasee val#, linkage]
1688 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1689 case bitc::MODULE_CODE_ALIAS: {
1690 if (Record.size() < 3)
1691 return Error("Invalid MODULE_ALIAS record");
1692 Type *Ty = getTypeByID(Record[0]);
1693 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1694 if (!Ty->isPointerTy())
1695 return Error("Function not a pointer type!");
1697 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1699 // Old bitcode files didn't have visibility field.
1700 if (Record.size() > 3)
1701 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1702 ValueList.push_back(NewGA);
1703 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1706 /// MODULE_CODE_PURGEVALS: [numvals]
1707 case bitc::MODULE_CODE_PURGEVALS:
1708 // Trim down the value list to the specified size.
1709 if (Record.size() < 1 || Record[0] > ValueList.size())
1710 return Error("Invalid MODULE_PURGEVALS record");
1711 ValueList.shrinkTo(Record[0]);
1717 return Error("Premature end of bitstream");
1720 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1723 if (InitStream()) return true;
1725 // Sniff for the signature.
1726 if (Stream.Read(8) != 'B' ||
1727 Stream.Read(8) != 'C' ||
1728 Stream.Read(4) != 0x0 ||
1729 Stream.Read(4) != 0xC ||
1730 Stream.Read(4) != 0xE ||
1731 Stream.Read(4) != 0xD)
1732 return Error("Invalid bitcode signature");
1734 // We expect a number of well-defined blocks, though we don't necessarily
1735 // need to understand them all.
1736 while (!Stream.AtEndOfStream()) {
1737 unsigned Code = Stream.ReadCode();
1739 if (Code != bitc::ENTER_SUBBLOCK) {
1741 // The ranlib in xcode 4 will align archive members by appending newlines
1742 // to the end of them. If this file size is a multiple of 4 but not 8, we
1743 // have to read and ignore these final 4 bytes :-(
1744 if (Stream.GetAbbrevIDWidth() == 2 && Code == 2 &&
1745 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1746 Stream.AtEndOfStream())
1749 return Error("Invalid record at top-level");
1752 unsigned BlockID = Stream.ReadSubBlockID();
1754 // We only know the MODULE subblock ID.
1756 case bitc::BLOCKINFO_BLOCK_ID:
1757 if (Stream.ReadBlockInfoBlock())
1758 return Error("Malformed BlockInfoBlock");
1760 case bitc::MODULE_BLOCK_ID:
1761 // Reject multiple MODULE_BLOCK's in a single bitstream.
1763 return Error("Multiple MODULE_BLOCKs in same stream");
1765 if (ParseModule(false))
1767 if (LazyStreamer) return false;
1770 if (Stream.SkipBlock())
1771 return Error("Malformed block record");
1779 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1780 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1781 return Error("Malformed block record");
1783 SmallVector<uint64_t, 64> Record;
1785 // Read all the records for this module.
1786 while (!Stream.AtEndOfStream()) {
1787 unsigned Code = Stream.ReadCode();
1788 if (Code == bitc::END_BLOCK) {
1789 if (Stream.ReadBlockEnd())
1790 return Error("Error at end of module block");
1795 if (Code == bitc::ENTER_SUBBLOCK) {
1796 switch (Stream.ReadSubBlockID()) {
1797 default: // Skip unknown content.
1798 if (Stream.SkipBlock())
1799 return Error("Malformed block record");
1805 if (Code == bitc::DEFINE_ABBREV) {
1806 Stream.ReadAbbrevRecord();
1811 switch (Stream.ReadRecord(Code, Record)) {
1812 default: break; // Default behavior, ignore unknown content.
1813 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1815 if (ConvertToString(Record, 0, S))
1816 return Error("Invalid MODULE_CODE_TRIPLE record");
1824 return Error("Premature end of bitstream");
1827 bool BitcodeReader::ParseTriple(std::string &Triple) {
1828 if (InitStream()) return true;
1830 // Sniff for the signature.
1831 if (Stream.Read(8) != 'B' ||
1832 Stream.Read(8) != 'C' ||
1833 Stream.Read(4) != 0x0 ||
1834 Stream.Read(4) != 0xC ||
1835 Stream.Read(4) != 0xE ||
1836 Stream.Read(4) != 0xD)
1837 return Error("Invalid bitcode signature");
1839 // We expect a number of well-defined blocks, though we don't necessarily
1840 // need to understand them all.
1841 while (!Stream.AtEndOfStream()) {
1842 unsigned Code = Stream.ReadCode();
1844 if (Code != bitc::ENTER_SUBBLOCK)
1845 return Error("Invalid record at top-level");
1847 unsigned BlockID = Stream.ReadSubBlockID();
1849 // We only know the MODULE subblock ID.
1851 case bitc::MODULE_BLOCK_ID:
1852 if (ParseModuleTriple(Triple))
1856 if (Stream.SkipBlock())
1857 return Error("Malformed block record");
1865 /// ParseMetadataAttachment - Parse metadata attachments.
1866 bool BitcodeReader::ParseMetadataAttachment() {
1867 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1868 return Error("Malformed block record");
1870 SmallVector<uint64_t, 64> Record;
1872 unsigned Code = Stream.ReadCode();
1873 if (Code == bitc::END_BLOCK) {
1874 if (Stream.ReadBlockEnd())
1875 return Error("Error at end of PARAMATTR block");
1878 if (Code == bitc::DEFINE_ABBREV) {
1879 Stream.ReadAbbrevRecord();
1882 // Read a metadata attachment record.
1884 switch (Stream.ReadRecord(Code, Record)) {
1885 default: // Default behavior: ignore.
1887 case bitc::METADATA_ATTACHMENT: {
1888 unsigned RecordLength = Record.size();
1889 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1890 return Error ("Invalid METADATA_ATTACHMENT reader!");
1891 Instruction *Inst = InstructionList[Record[0]];
1892 for (unsigned i = 1; i != RecordLength; i = i+2) {
1893 unsigned Kind = Record[i];
1894 DenseMap<unsigned, unsigned>::iterator I =
1895 MDKindMap.find(Kind);
1896 if (I == MDKindMap.end())
1897 return Error("Invalid metadata kind ID");
1898 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1899 Inst->setMetadata(I->second, cast<MDNode>(Node));
1908 /// ParseFunctionBody - Lazily parse the specified function body block.
1909 bool BitcodeReader::ParseFunctionBody(Function *F) {
1910 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1911 return Error("Malformed block record");
1913 InstructionList.clear();
1914 unsigned ModuleValueListSize = ValueList.size();
1915 unsigned ModuleMDValueListSize = MDValueList.size();
1917 // Add all the function arguments to the value table.
1918 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1919 ValueList.push_back(I);
1921 unsigned NextValueNo = ValueList.size();
1922 BasicBlock *CurBB = 0;
1923 unsigned CurBBNo = 0;
1927 // Read all the records.
1928 SmallVector<uint64_t, 64> Record;
1930 unsigned Code = Stream.ReadCode();
1931 if (Code == bitc::END_BLOCK) {
1932 if (Stream.ReadBlockEnd())
1933 return Error("Error at end of function block");
1937 if (Code == bitc::ENTER_SUBBLOCK) {
1938 switch (Stream.ReadSubBlockID()) {
1939 default: // Skip unknown content.
1940 if (Stream.SkipBlock())
1941 return Error("Malformed block record");
1943 case bitc::CONSTANTS_BLOCK_ID:
1944 if (ParseConstants()) return true;
1945 NextValueNo = ValueList.size();
1947 case bitc::VALUE_SYMTAB_BLOCK_ID:
1948 if (ParseValueSymbolTable()) return true;
1950 case bitc::METADATA_ATTACHMENT_ID:
1951 if (ParseMetadataAttachment()) return true;
1953 case bitc::METADATA_BLOCK_ID:
1954 if (ParseMetadata()) return true;
1960 if (Code == bitc::DEFINE_ABBREV) {
1961 Stream.ReadAbbrevRecord();
1968 unsigned BitCode = Stream.ReadRecord(Code, Record);
1970 default: // Default behavior: reject
1971 return Error("Unknown instruction");
1972 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1973 if (Record.size() < 1 || Record[0] == 0)
1974 return Error("Invalid DECLAREBLOCKS record");
1975 // Create all the basic blocks for the function.
1976 FunctionBBs.resize(Record[0]);
1977 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1978 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1979 CurBB = FunctionBBs[0];
1982 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1983 // This record indicates that the last instruction is at the same
1984 // location as the previous instruction with a location.
1987 // Get the last instruction emitted.
1988 if (CurBB && !CurBB->empty())
1990 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1991 !FunctionBBs[CurBBNo-1]->empty())
1992 I = &FunctionBBs[CurBBNo-1]->back();
1994 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1995 I->setDebugLoc(LastLoc);
1999 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
2000 I = 0; // Get the last instruction emitted.
2001 if (CurBB && !CurBB->empty())
2003 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
2004 !FunctionBBs[CurBBNo-1]->empty())
2005 I = &FunctionBBs[CurBBNo-1]->back();
2006 if (I == 0 || Record.size() < 4)
2007 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
2009 unsigned Line = Record[0], Col = Record[1];
2010 unsigned ScopeID = Record[2], IAID = Record[3];
2012 MDNode *Scope = 0, *IA = 0;
2013 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
2014 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
2015 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
2016 I->setDebugLoc(LastLoc);
2021 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
2024 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2025 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
2026 OpNum+1 > Record.size())
2027 return Error("Invalid BINOP record");
2029 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
2030 if (Opc == -1) return Error("Invalid BINOP record");
2031 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
2032 InstructionList.push_back(I);
2033 if (OpNum < Record.size()) {
2034 if (Opc == Instruction::Add ||
2035 Opc == Instruction::Sub ||
2036 Opc == Instruction::Mul ||
2037 Opc == Instruction::Shl) {
2038 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2039 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
2040 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2041 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
2042 } else if (Opc == Instruction::SDiv ||
2043 Opc == Instruction::UDiv ||
2044 Opc == Instruction::LShr ||
2045 Opc == Instruction::AShr) {
2046 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
2047 cast<BinaryOperator>(I)->setIsExact(true);
2048 } else if (isa<FPMathOperator>(I)) {
2050 if (0 != (Record[OpNum] & FastMathFlags::UnsafeAlgebra))
2051 FMF.setUnsafeAlgebra();
2052 if (0 != (Record[OpNum] & FastMathFlags::NoNaNs))
2054 if (0 != (Record[OpNum] & FastMathFlags::NoInfs))
2056 if (0 != (Record[OpNum] & FastMathFlags::NoSignedZeros))
2057 FMF.setNoSignedZeros();
2058 if (0 != (Record[OpNum] & FastMathFlags::AllowReciprocal))
2059 FMF.setAllowReciprocal();
2061 I->setFastMathFlags(FMF);
2067 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
2070 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2071 OpNum+2 != Record.size())
2072 return Error("Invalid CAST record");
2074 Type *ResTy = getTypeByID(Record[OpNum]);
2075 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
2076 if (Opc == -1 || ResTy == 0)
2077 return Error("Invalid CAST record");
2078 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
2079 InstructionList.push_back(I);
2082 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
2083 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
2086 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
2087 return Error("Invalid GEP record");
2089 SmallVector<Value*, 16> GEPIdx;
2090 while (OpNum != Record.size()) {
2092 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2093 return Error("Invalid GEP record");
2094 GEPIdx.push_back(Op);
2097 I = GetElementPtrInst::Create(BasePtr, GEPIdx);
2098 InstructionList.push_back(I);
2099 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
2100 cast<GetElementPtrInst>(I)->setIsInBounds(true);
2104 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
2105 // EXTRACTVAL: [opty, opval, n x indices]
2108 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2109 return Error("Invalid EXTRACTVAL record");
2111 SmallVector<unsigned, 4> EXTRACTVALIdx;
2112 for (unsigned RecSize = Record.size();
2113 OpNum != RecSize; ++OpNum) {
2114 uint64_t Index = Record[OpNum];
2115 if ((unsigned)Index != Index)
2116 return Error("Invalid EXTRACTVAL index");
2117 EXTRACTVALIdx.push_back((unsigned)Index);
2120 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
2121 InstructionList.push_back(I);
2125 case bitc::FUNC_CODE_INST_INSERTVAL: {
2126 // INSERTVAL: [opty, opval, opty, opval, n x indices]
2129 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2130 return Error("Invalid INSERTVAL record");
2132 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
2133 return Error("Invalid INSERTVAL record");
2135 SmallVector<unsigned, 4> INSERTVALIdx;
2136 for (unsigned RecSize = Record.size();
2137 OpNum != RecSize; ++OpNum) {
2138 uint64_t Index = Record[OpNum];
2139 if ((unsigned)Index != Index)
2140 return Error("Invalid INSERTVAL index");
2141 INSERTVALIdx.push_back((unsigned)Index);
2144 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
2145 InstructionList.push_back(I);
2149 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2150 // obsolete form of select
2151 // handles select i1 ... in old bitcode
2153 Value *TrueVal, *FalseVal, *Cond;
2154 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2155 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
2156 popValue(Record, OpNum, NextValueNo, Type::getInt1Ty(Context), Cond))
2157 return Error("Invalid SELECT record");
2159 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2160 InstructionList.push_back(I);
2164 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2165 // new form of select
2166 // handles select i1 or select [N x i1]
2168 Value *TrueVal, *FalseVal, *Cond;
2169 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2170 popValue(Record, OpNum, NextValueNo, TrueVal->getType(), FalseVal) ||
2171 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2172 return Error("Invalid SELECT record");
2174 // select condition can be either i1 or [N x i1]
2175 if (VectorType* vector_type =
2176 dyn_cast<VectorType>(Cond->getType())) {
2178 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2179 return Error("Invalid SELECT condition type");
2182 if (Cond->getType() != Type::getInt1Ty(Context))
2183 return Error("Invalid SELECT condition type");
2186 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2187 InstructionList.push_back(I);
2191 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2194 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2195 popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
2196 return Error("Invalid EXTRACTELT record");
2197 I = ExtractElementInst::Create(Vec, Idx);
2198 InstructionList.push_back(I);
2202 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2204 Value *Vec, *Elt, *Idx;
2205 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2206 popValue(Record, OpNum, NextValueNo,
2207 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2208 popValue(Record, OpNum, NextValueNo, Type::getInt32Ty(Context), Idx))
2209 return Error("Invalid INSERTELT record");
2210 I = InsertElementInst::Create(Vec, Elt, Idx);
2211 InstructionList.push_back(I);
2215 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2217 Value *Vec1, *Vec2, *Mask;
2218 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2219 popValue(Record, OpNum, NextValueNo, Vec1->getType(), Vec2))
2220 return Error("Invalid SHUFFLEVEC record");
2222 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2223 return Error("Invalid SHUFFLEVEC record");
2224 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2225 InstructionList.push_back(I);
2229 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2230 // Old form of ICmp/FCmp returning bool
2231 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2232 // both legal on vectors but had different behaviour.
2233 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2234 // FCmp/ICmp returning bool or vector of bool
2238 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2239 popValue(Record, OpNum, NextValueNo, LHS->getType(), RHS) ||
2240 OpNum+1 != Record.size())
2241 return Error("Invalid CMP record");
2243 if (LHS->getType()->isFPOrFPVectorTy())
2244 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2246 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2247 InstructionList.push_back(I);
2251 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2253 unsigned Size = Record.size();
2255 I = ReturnInst::Create(Context);
2256 InstructionList.push_back(I);
2262 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2263 return Error("Invalid RET record");
2264 if (OpNum != Record.size())
2265 return Error("Invalid RET record");
2267 I = ReturnInst::Create(Context, Op);
2268 InstructionList.push_back(I);
2271 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2272 if (Record.size() != 1 && Record.size() != 3)
2273 return Error("Invalid BR record");
2274 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2276 return Error("Invalid BR record");
2278 if (Record.size() == 1) {
2279 I = BranchInst::Create(TrueDest);
2280 InstructionList.push_back(I);
2283 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2284 Value *Cond = getValue(Record, 2, NextValueNo,
2285 Type::getInt1Ty(Context));
2286 if (FalseDest == 0 || Cond == 0)
2287 return Error("Invalid BR record");
2288 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2289 InstructionList.push_back(I);
2293 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2295 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
2296 // New SwitchInst format with case ranges.
2298 Type *OpTy = getTypeByID(Record[1]);
2299 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
2301 Value *Cond = getValue(Record, 2, NextValueNo, OpTy);
2302 BasicBlock *Default = getBasicBlock(Record[3]);
2303 if (OpTy == 0 || Cond == 0 || Default == 0)
2304 return Error("Invalid SWITCH record");
2306 unsigned NumCases = Record[4];
2308 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2309 InstructionList.push_back(SI);
2311 unsigned CurIdx = 5;
2312 for (unsigned i = 0; i != NumCases; ++i) {
2313 IntegersSubsetToBB CaseBuilder;
2314 unsigned NumItems = Record[CurIdx++];
2315 for (unsigned ci = 0; ci != NumItems; ++ci) {
2316 bool isSingleNumber = Record[CurIdx++];
2319 unsigned ActiveWords = 1;
2320 if (ValueBitWidth > 64)
2321 ActiveWords = Record[CurIdx++];
2322 Low = ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2324 CurIdx += ActiveWords;
2326 if (!isSingleNumber) {
2328 if (ValueBitWidth > 64)
2329 ActiveWords = Record[CurIdx++];
2331 ReadWideAPInt(makeArrayRef(&Record[CurIdx], ActiveWords),
2334 CaseBuilder.add(IntItem::fromType(OpTy, Low),
2335 IntItem::fromType(OpTy, High));
2336 CurIdx += ActiveWords;
2338 CaseBuilder.add(IntItem::fromType(OpTy, Low));
2340 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
2341 IntegersSubset Case = CaseBuilder.getCase();
2342 SI->addCase(Case, DestBB);
2344 uint16_t Hash = SI->hash();
2345 if (Hash != (Record[0] & 0xFFFF))
2346 return Error("Invalid SWITCH record");
2351 // Old SwitchInst format without case ranges.
2353 if (Record.size() < 3 || (Record.size() & 1) == 0)
2354 return Error("Invalid SWITCH record");
2355 Type *OpTy = getTypeByID(Record[0]);
2356 Value *Cond = getValue(Record, 1, NextValueNo, OpTy);
2357 BasicBlock *Default = getBasicBlock(Record[2]);
2358 if (OpTy == 0 || Cond == 0 || Default == 0)
2359 return Error("Invalid SWITCH record");
2360 unsigned NumCases = (Record.size()-3)/2;
2361 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2362 InstructionList.push_back(SI);
2363 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2364 ConstantInt *CaseVal =
2365 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2366 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2367 if (CaseVal == 0 || DestBB == 0) {
2369 return Error("Invalid SWITCH record!");
2371 SI->addCase(CaseVal, DestBB);
2376 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2377 if (Record.size() < 2)
2378 return Error("Invalid INDIRECTBR record");
2379 Type *OpTy = getTypeByID(Record[0]);
2380 Value *Address = getValue(Record, 1, NextValueNo, OpTy);
2381 if (OpTy == 0 || Address == 0)
2382 return Error("Invalid INDIRECTBR record");
2383 unsigned NumDests = Record.size()-2;
2384 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2385 InstructionList.push_back(IBI);
2386 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2387 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2388 IBI->addDestination(DestBB);
2391 return Error("Invalid INDIRECTBR record!");
2398 case bitc::FUNC_CODE_INST_INVOKE: {
2399 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2400 if (Record.size() < 4) return Error("Invalid INVOKE record");
2401 AttributeSet PAL = getAttributes(Record[0]);
2402 unsigned CCInfo = Record[1];
2403 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2404 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2408 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2409 return Error("Invalid INVOKE record");
2411 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2412 FunctionType *FTy = !CalleeTy ? 0 :
2413 dyn_cast<FunctionType>(CalleeTy->getElementType());
2415 // Check that the right number of fixed parameters are here.
2416 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2417 Record.size() < OpNum+FTy->getNumParams())
2418 return Error("Invalid INVOKE record");
2420 SmallVector<Value*, 16> Ops;
2421 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2422 Ops.push_back(getValue(Record, OpNum, NextValueNo,
2423 FTy->getParamType(i)));
2424 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2427 if (!FTy->isVarArg()) {
2428 if (Record.size() != OpNum)
2429 return Error("Invalid INVOKE record");
2431 // Read type/value pairs for varargs params.
2432 while (OpNum != Record.size()) {
2434 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2435 return Error("Invalid INVOKE record");
2440 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
2441 InstructionList.push_back(I);
2442 cast<InvokeInst>(I)->setCallingConv(
2443 static_cast<CallingConv::ID>(CCInfo));
2444 cast<InvokeInst>(I)->setAttributes(PAL);
2447 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
2450 if (getValueTypePair(Record, Idx, NextValueNo, Val))
2451 return Error("Invalid RESUME record");
2452 I = ResumeInst::Create(Val);
2453 InstructionList.push_back(I);
2456 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2457 I = new UnreachableInst(Context);
2458 InstructionList.push_back(I);
2460 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2461 if (Record.size() < 1 || ((Record.size()-1)&1))
2462 return Error("Invalid PHI record");
2463 Type *Ty = getTypeByID(Record[0]);
2464 if (!Ty) return Error("Invalid PHI record");
2466 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2467 InstructionList.push_back(PN);
2469 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2471 // With the new function encoding, it is possible that operands have
2472 // negative IDs (for forward references). Use a signed VBR
2473 // representation to keep the encoding small.
2475 V = getValueSigned(Record, 1+i, NextValueNo, Ty);
2477 V = getValue(Record, 1+i, NextValueNo, Ty);
2478 BasicBlock *BB = getBasicBlock(Record[2+i]);
2479 if (!V || !BB) return Error("Invalid PHI record");
2480 PN->addIncoming(V, BB);
2486 case bitc::FUNC_CODE_INST_LANDINGPAD: {
2487 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
2489 if (Record.size() < 4)
2490 return Error("Invalid LANDINGPAD record");
2491 Type *Ty = getTypeByID(Record[Idx++]);
2492 if (!Ty) return Error("Invalid LANDINGPAD record");
2494 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
2495 return Error("Invalid LANDINGPAD record");
2497 bool IsCleanup = !!Record[Idx++];
2498 unsigned NumClauses = Record[Idx++];
2499 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
2500 LP->setCleanup(IsCleanup);
2501 for (unsigned J = 0; J != NumClauses; ++J) {
2502 LandingPadInst::ClauseType CT =
2503 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
2506 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
2508 return Error("Invalid LANDINGPAD record");
2511 assert((CT != LandingPadInst::Catch ||
2512 !isa<ArrayType>(Val->getType())) &&
2513 "Catch clause has a invalid type!");
2514 assert((CT != LandingPadInst::Filter ||
2515 isa<ArrayType>(Val->getType())) &&
2516 "Filter clause has invalid type!");
2521 InstructionList.push_back(I);
2525 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2526 if (Record.size() != 4)
2527 return Error("Invalid ALLOCA record");
2529 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2530 Type *OpTy = getTypeByID(Record[1]);
2531 Value *Size = getFnValueByID(Record[2], OpTy);
2532 unsigned Align = Record[3];
2533 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2534 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2535 InstructionList.push_back(I);
2538 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2541 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2542 OpNum+2 != Record.size())
2543 return Error("Invalid LOAD record");
2545 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2546 InstructionList.push_back(I);
2549 case bitc::FUNC_CODE_INST_LOADATOMIC: {
2550 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
2553 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2554 OpNum+4 != Record.size())
2555 return Error("Invalid LOADATOMIC record");
2558 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2559 if (Ordering == NotAtomic || Ordering == Release ||
2560 Ordering == AcquireRelease)
2561 return Error("Invalid LOADATOMIC record");
2562 if (Ordering != NotAtomic && Record[OpNum] == 0)
2563 return Error("Invalid LOADATOMIC record");
2564 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2566 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2567 Ordering, SynchScope);
2568 InstructionList.push_back(I);
2571 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
2574 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2575 popValue(Record, OpNum, NextValueNo,
2576 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2577 OpNum+2 != Record.size())
2578 return Error("Invalid STORE record");
2580 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2581 InstructionList.push_back(I);
2584 case bitc::FUNC_CODE_INST_STOREATOMIC: {
2585 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
2588 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2589 popValue(Record, OpNum, NextValueNo,
2590 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2591 OpNum+4 != Record.size())
2592 return Error("Invalid STOREATOMIC record");
2594 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2595 if (Ordering == NotAtomic || Ordering == Acquire ||
2596 Ordering == AcquireRelease)
2597 return Error("Invalid STOREATOMIC record");
2598 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2599 if (Ordering != NotAtomic && Record[OpNum] == 0)
2600 return Error("Invalid STOREATOMIC record");
2602 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2603 Ordering, SynchScope);
2604 InstructionList.push_back(I);
2607 case bitc::FUNC_CODE_INST_CMPXCHG: {
2608 // CMPXCHG:[ptrty, ptr, cmp, new, vol, ordering, synchscope]
2610 Value *Ptr, *Cmp, *New;
2611 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2612 popValue(Record, OpNum, NextValueNo,
2613 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
2614 popValue(Record, OpNum, NextValueNo,
2615 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
2616 OpNum+3 != Record.size())
2617 return Error("Invalid CMPXCHG record");
2618 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+1]);
2619 if (Ordering == NotAtomic || Ordering == Unordered)
2620 return Error("Invalid CMPXCHG record");
2621 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
2622 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, SynchScope);
2623 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
2624 InstructionList.push_back(I);
2627 case bitc::FUNC_CODE_INST_ATOMICRMW: {
2628 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
2631 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2632 popValue(Record, OpNum, NextValueNo,
2633 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2634 OpNum+4 != Record.size())
2635 return Error("Invalid ATOMICRMW record");
2636 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
2637 if (Operation < AtomicRMWInst::FIRST_BINOP ||
2638 Operation > AtomicRMWInst::LAST_BINOP)
2639 return Error("Invalid ATOMICRMW record");
2640 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2641 if (Ordering == NotAtomic || Ordering == Unordered)
2642 return Error("Invalid ATOMICRMW record");
2643 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2644 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
2645 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
2646 InstructionList.push_back(I);
2649 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
2650 if (2 != Record.size())
2651 return Error("Invalid FENCE record");
2652 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
2653 if (Ordering == NotAtomic || Ordering == Unordered ||
2654 Ordering == Monotonic)
2655 return Error("Invalid FENCE record");
2656 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
2657 I = new FenceInst(Context, Ordering, SynchScope);
2658 InstructionList.push_back(I);
2661 case bitc::FUNC_CODE_INST_CALL: {
2662 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2663 if (Record.size() < 3)
2664 return Error("Invalid CALL record");
2666 AttributeSet PAL = getAttributes(Record[0]);
2667 unsigned CCInfo = Record[1];
2671 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2672 return Error("Invalid CALL record");
2674 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2675 FunctionType *FTy = 0;
2676 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2677 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2678 return Error("Invalid CALL record");
2680 SmallVector<Value*, 16> Args;
2681 // Read the fixed params.
2682 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2683 if (FTy->getParamType(i)->isLabelTy())
2684 Args.push_back(getBasicBlock(Record[OpNum]));
2686 Args.push_back(getValue(Record, OpNum, NextValueNo,
2687 FTy->getParamType(i)));
2688 if (Args.back() == 0) return Error("Invalid CALL record");
2691 // Read type/value pairs for varargs params.
2692 if (!FTy->isVarArg()) {
2693 if (OpNum != Record.size())
2694 return Error("Invalid CALL record");
2696 while (OpNum != Record.size()) {
2698 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2699 return Error("Invalid CALL record");
2704 I = CallInst::Create(Callee, Args);
2705 InstructionList.push_back(I);
2706 cast<CallInst>(I)->setCallingConv(
2707 static_cast<CallingConv::ID>(CCInfo>>1));
2708 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2709 cast<CallInst>(I)->setAttributes(PAL);
2712 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2713 if (Record.size() < 3)
2714 return Error("Invalid VAARG record");
2715 Type *OpTy = getTypeByID(Record[0]);
2716 Value *Op = getValue(Record, 1, NextValueNo, OpTy);
2717 Type *ResTy = getTypeByID(Record[2]);
2718 if (!OpTy || !Op || !ResTy)
2719 return Error("Invalid VAARG record");
2720 I = new VAArgInst(Op, ResTy);
2721 InstructionList.push_back(I);
2726 // Add instruction to end of current BB. If there is no current BB, reject
2730 return Error("Invalid instruction with no BB");
2732 CurBB->getInstList().push_back(I);
2734 // If this was a terminator instruction, move to the next block.
2735 if (isa<TerminatorInst>(I)) {
2737 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2740 // Non-void values get registered in the value table for future use.
2741 if (I && !I->getType()->isVoidTy())
2742 ValueList.AssignValue(I, NextValueNo++);
2745 // Check the function list for unresolved values.
2746 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2747 if (A->getParent() == 0) {
2748 // We found at least one unresolved value. Nuke them all to avoid leaks.
2749 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2750 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2751 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2755 return Error("Never resolved value found in function!");
2759 // FIXME: Check for unresolved forward-declared metadata references
2760 // and clean up leaks.
2762 // See if anything took the address of blocks in this function. If so,
2763 // resolve them now.
2764 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2765 BlockAddrFwdRefs.find(F);
2766 if (BAFRI != BlockAddrFwdRefs.end()) {
2767 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2768 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2769 unsigned BlockIdx = RefList[i].first;
2770 if (BlockIdx >= FunctionBBs.size())
2771 return Error("Invalid blockaddress block #");
2773 GlobalVariable *FwdRef = RefList[i].second;
2774 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2775 FwdRef->eraseFromParent();
2778 BlockAddrFwdRefs.erase(BAFRI);
2781 // Trim the value list down to the size it was before we parsed this function.
2782 ValueList.shrinkTo(ModuleValueListSize);
2783 MDValueList.shrinkTo(ModuleMDValueListSize);
2784 std::vector<BasicBlock*>().swap(FunctionBBs);
2788 /// FindFunctionInStream - Find the function body in the bitcode stream
2789 bool BitcodeReader::FindFunctionInStream(Function *F,
2790 DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator) {
2791 while (DeferredFunctionInfoIterator->second == 0) {
2792 if (Stream.AtEndOfStream())
2793 return Error("Could not find Function in stream");
2794 // ParseModule will parse the next body in the stream and set its
2795 // position in the DeferredFunctionInfo map.
2796 if (ParseModule(true)) return true;
2801 //===----------------------------------------------------------------------===//
2802 // GVMaterializer implementation
2803 //===----------------------------------------------------------------------===//
2806 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2807 if (const Function *F = dyn_cast<Function>(GV)) {
2808 return F->isDeclaration() &&
2809 DeferredFunctionInfo.count(const_cast<Function*>(F));
2814 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2815 Function *F = dyn_cast<Function>(GV);
2816 // If it's not a function or is already material, ignore the request.
2817 if (!F || !F->isMaterializable()) return false;
2819 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2820 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2821 // If its position is recorded as 0, its body is somewhere in the stream
2822 // but we haven't seen it yet.
2823 if (DFII->second == 0)
2824 if (LazyStreamer && FindFunctionInStream(F, DFII)) return true;
2826 // Move the bit stream to the saved position of the deferred function body.
2827 Stream.JumpToBit(DFII->second);
2829 if (ParseFunctionBody(F)) {
2830 if (ErrInfo) *ErrInfo = ErrorString;
2834 // Upgrade any old intrinsic calls in the function.
2835 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2836 E = UpgradedIntrinsics.end(); I != E; ++I) {
2837 if (I->first != I->second) {
2838 for (Value::use_iterator UI = I->first->use_begin(),
2839 UE = I->first->use_end(); UI != UE; ) {
2840 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2841 UpgradeIntrinsicCall(CI, I->second);
2849 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2850 const Function *F = dyn_cast<Function>(GV);
2851 if (!F || F->isDeclaration())
2853 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2856 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2857 Function *F = dyn_cast<Function>(GV);
2858 // If this function isn't dematerializable, this is a noop.
2859 if (!F || !isDematerializable(F))
2862 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2864 // Just forget the function body, we can remat it later.
2869 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2870 assert(M == TheModule &&
2871 "Can only Materialize the Module this BitcodeReader is attached to.");
2872 // Iterate over the module, deserializing any functions that are still on
2874 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2876 if (F->isMaterializable() &&
2877 Materialize(F, ErrInfo))
2880 // At this point, if there are any function bodies, the current bit is
2881 // pointing to the END_BLOCK record after them. Now make sure the rest
2882 // of the bits in the module have been read.
2886 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2887 // delete the old functions to clean up. We can't do this unless the entire
2888 // module is materialized because there could always be another function body
2889 // with calls to the old function.
2890 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2891 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2892 if (I->first != I->second) {
2893 for (Value::use_iterator UI = I->first->use_begin(),
2894 UE = I->first->use_end(); UI != UE; ) {
2895 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2896 UpgradeIntrinsicCall(CI, I->second);
2898 if (!I->first->use_empty())
2899 I->first->replaceAllUsesWith(I->second);
2900 I->first->eraseFromParent();
2903 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2908 bool BitcodeReader::InitStream() {
2909 if (LazyStreamer) return InitLazyStream();
2910 return InitStreamFromBuffer();
2913 bool BitcodeReader::InitStreamFromBuffer() {
2914 const unsigned char *BufPtr = (const unsigned char*)Buffer->getBufferStart();
2915 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
2917 if (Buffer->getBufferSize() & 3) {
2918 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
2919 return Error("Invalid bitcode signature");
2921 return Error("Bitcode stream should be a multiple of 4 bytes in length");
2924 // If we have a wrapper header, parse it and ignore the non-bc file contents.
2925 // The magic number is 0x0B17C0DE stored in little endian.
2926 if (isBitcodeWrapper(BufPtr, BufEnd))
2927 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
2928 return Error("Invalid bitcode wrapper header");
2930 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
2931 Stream.init(*StreamFile);
2936 bool BitcodeReader::InitLazyStream() {
2937 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
2939 StreamingMemoryObject *Bytes = new StreamingMemoryObject(LazyStreamer);
2940 StreamFile.reset(new BitstreamReader(Bytes));
2941 Stream.init(*StreamFile);
2943 unsigned char buf[16];
2944 if (Bytes->readBytes(0, 16, buf, NULL) == -1)
2945 return Error("Bitcode stream must be at least 16 bytes in length");
2947 if (!isBitcode(buf, buf + 16))
2948 return Error("Invalid bitcode signature");
2950 if (isBitcodeWrapper(buf, buf + 4)) {
2951 const unsigned char *bitcodeStart = buf;
2952 const unsigned char *bitcodeEnd = buf + 16;
2953 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
2954 Bytes->dropLeadingBytes(bitcodeStart - buf);
2955 Bytes->setKnownObjectSize(bitcodeEnd - bitcodeStart);
2960 //===----------------------------------------------------------------------===//
2961 // External interface
2962 //===----------------------------------------------------------------------===//
2964 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2966 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2967 LLVMContext& Context,
2968 std::string *ErrMsg) {
2969 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2970 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2971 M->setMaterializer(R);
2972 if (R->ParseBitcodeInto(M)) {
2974 *ErrMsg = R->getErrorString();
2976 delete M; // Also deletes R.
2979 // Have the BitcodeReader dtor delete 'Buffer'.
2980 R->setBufferOwned(true);
2982 R->materializeForwardReferencedFunctions();
2988 Module *llvm::getStreamedBitcodeModule(const std::string &name,
2989 DataStreamer *streamer,
2990 LLVMContext &Context,
2991 std::string *ErrMsg) {
2992 Module *M = new Module(name, Context);
2993 BitcodeReader *R = new BitcodeReader(streamer, Context);
2994 M->setMaterializer(R);
2995 if (R->ParseBitcodeInto(M)) {
2997 *ErrMsg = R->getErrorString();
2998 delete M; // Also deletes R.
3001 R->setBufferOwned(false); // no buffer to delete
3005 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
3006 /// If an error occurs, return null and fill in *ErrMsg if non-null.
3007 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
3008 std::string *ErrMsg){
3009 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
3012 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
3013 // there was an error.
3014 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
3016 // Read in the entire module, and destroy the BitcodeReader.
3017 if (M->MaterializeAllPermanently(ErrMsg)) {
3022 // TODO: Restore the use-lists to the in-memory state when the bitcode was
3023 // written. We must defer until the Module has been fully materialized.
3028 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
3029 LLVMContext& Context,
3030 std::string *ErrMsg) {
3031 BitcodeReader *R = new BitcodeReader(Buffer, Context);
3032 // Don't let the BitcodeReader dtor delete 'Buffer'.
3033 R->setBufferOwned(false);
3035 std::string Triple("");
3036 if (R->ParseTriple(Triple))
3038 *ErrMsg = R->getErrorString();