1 //===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This header defines the BitcodeReader class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Bitcode/ReaderWriter.h"
15 #include "BitcodeReader.h"
16 #include "llvm/Constants.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/InlineAsm.h"
19 #include "llvm/Instructions.h"
20 #include "llvm/LLVMContext.h"
21 #include "llvm/Metadata.h"
22 #include "llvm/Module.h"
23 #include "llvm/Operator.h"
24 #include "llvm/AutoUpgrade.h"
25 #include "llvm/ADT/SmallString.h"
26 #include "llvm/ADT/SmallVector.h"
27 #include "llvm/Support/MathExtras.h"
28 #include "llvm/Support/MemoryBuffer.h"
29 #include "llvm/OperandTraits.h"
32 void BitcodeReader::FreeState() {
35 std::vector<PATypeHolder>().swap(TypeList);
39 std::vector<AttrListPtr>().swap(MAttributes);
40 std::vector<BasicBlock*>().swap(FunctionBBs);
41 std::vector<Function*>().swap(FunctionsWithBodies);
42 DeferredFunctionInfo.clear();
45 //===----------------------------------------------------------------------===//
46 // Helper functions to implement forward reference resolution, etc.
47 //===----------------------------------------------------------------------===//
49 /// ConvertToString - Convert a string from a record into an std::string, return
51 template<typename StrTy>
52 static bool ConvertToString(SmallVector<uint64_t, 64> &Record, unsigned Idx,
54 if (Idx > Record.size())
57 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
58 Result += (char)Record[i];
62 static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
64 default: // Map unknown/new linkages to external
65 case 0: return GlobalValue::ExternalLinkage;
66 case 1: return GlobalValue::WeakAnyLinkage;
67 case 2: return GlobalValue::AppendingLinkage;
68 case 3: return GlobalValue::InternalLinkage;
69 case 4: return GlobalValue::LinkOnceAnyLinkage;
70 case 5: return GlobalValue::DLLImportLinkage;
71 case 6: return GlobalValue::DLLExportLinkage;
72 case 7: return GlobalValue::ExternalWeakLinkage;
73 case 8: return GlobalValue::CommonLinkage;
74 case 9: return GlobalValue::PrivateLinkage;
75 case 10: return GlobalValue::WeakODRLinkage;
76 case 11: return GlobalValue::LinkOnceODRLinkage;
77 case 12: return GlobalValue::AvailableExternallyLinkage;
78 case 13: return GlobalValue::LinkerPrivateLinkage;
82 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
84 default: // Map unknown visibilities to default.
85 case 0: return GlobalValue::DefaultVisibility;
86 case 1: return GlobalValue::HiddenVisibility;
87 case 2: return GlobalValue::ProtectedVisibility;
91 static int GetDecodedCastOpcode(unsigned Val) {
94 case bitc::CAST_TRUNC : return Instruction::Trunc;
95 case bitc::CAST_ZEXT : return Instruction::ZExt;
96 case bitc::CAST_SEXT : return Instruction::SExt;
97 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
98 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
99 case bitc::CAST_UITOFP : return Instruction::UIToFP;
100 case bitc::CAST_SITOFP : return Instruction::SIToFP;
101 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
102 case bitc::CAST_FPEXT : return Instruction::FPExt;
103 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
104 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
105 case bitc::CAST_BITCAST : return Instruction::BitCast;
108 static int GetDecodedBinaryOpcode(unsigned Val, const Type *Ty) {
111 case bitc::BINOP_ADD:
112 return Ty->isFPOrFPVector() ? Instruction::FAdd : Instruction::Add;
113 case bitc::BINOP_SUB:
114 return Ty->isFPOrFPVector() ? Instruction::FSub : Instruction::Sub;
115 case bitc::BINOP_MUL:
116 return Ty->isFPOrFPVector() ? Instruction::FMul : Instruction::Mul;
117 case bitc::BINOP_UDIV: return Instruction::UDiv;
118 case bitc::BINOP_SDIV:
119 return Ty->isFPOrFPVector() ? Instruction::FDiv : Instruction::SDiv;
120 case bitc::BINOP_UREM: return Instruction::URem;
121 case bitc::BINOP_SREM:
122 return Ty->isFPOrFPVector() ? Instruction::FRem : Instruction::SRem;
123 case bitc::BINOP_SHL: return Instruction::Shl;
124 case bitc::BINOP_LSHR: return Instruction::LShr;
125 case bitc::BINOP_ASHR: return Instruction::AShr;
126 case bitc::BINOP_AND: return Instruction::And;
127 case bitc::BINOP_OR: return Instruction::Or;
128 case bitc::BINOP_XOR: return Instruction::Xor;
134 /// @brief A class for maintaining the slot number definition
135 /// as a placeholder for the actual definition for forward constants defs.
136 class ConstantPlaceHolder : public ConstantExpr {
137 ConstantPlaceHolder(); // DO NOT IMPLEMENT
138 void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
140 // allocate space for exactly one operand
141 void *operator new(size_t s) {
142 return User::operator new(s, 1);
144 explicit ConstantPlaceHolder(const Type *Ty, LLVMContext& Context)
145 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
146 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
149 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
150 static inline bool classof(const ConstantPlaceHolder *) { return true; }
151 static bool classof(const Value *V) {
152 return isa<ConstantExpr>(V) &&
153 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
157 /// Provide fast operand accessors
158 //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
162 // FIXME: can we inherit this from ConstantExpr?
164 struct OperandTraits<ConstantPlaceHolder> : FixedNumOperandTraits<1> {
169 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
178 WeakVH &OldV = ValuePtrs[Idx];
184 // Handle constants and non-constants (e.g. instrs) differently for
186 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
187 ResolveConstants.push_back(std::make_pair(PHC, Idx));
190 // If there was a forward reference to this value, replace it.
191 Value *PrevVal = OldV;
192 OldV->replaceAllUsesWith(V);
198 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
203 if (Value *V = ValuePtrs[Idx]) {
204 assert(Ty == V->getType() && "Type mismatch in constant table!");
205 return cast<Constant>(V);
208 // Create and return a placeholder, which will later be RAUW'd.
209 Constant *C = new ConstantPlaceHolder(Ty, Context);
214 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, const Type *Ty) {
218 if (Value *V = ValuePtrs[Idx]) {
219 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
223 // No type specified, must be invalid reference.
224 if (Ty == 0) return 0;
226 // Create and return a placeholder, which will later be RAUW'd.
227 Value *V = new Argument(Ty);
232 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
233 /// resolves any forward references. The idea behind this is that we sometimes
234 /// get constants (such as large arrays) which reference *many* forward ref
235 /// constants. Replacing each of these causes a lot of thrashing when
236 /// building/reuniquing the constant. Instead of doing this, we look at all the
237 /// uses and rewrite all the place holders at once for any constant that uses
239 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
240 // Sort the values by-pointer so that they are efficient to look up with a
242 std::sort(ResolveConstants.begin(), ResolveConstants.end());
244 SmallVector<Constant*, 64> NewOps;
246 while (!ResolveConstants.empty()) {
247 Value *RealVal = operator[](ResolveConstants.back().second);
248 Constant *Placeholder = ResolveConstants.back().first;
249 ResolveConstants.pop_back();
251 // Loop over all users of the placeholder, updating them to reference the
252 // new value. If they reference more than one placeholder, update them all
254 while (!Placeholder->use_empty()) {
255 Value::use_iterator UI = Placeholder->use_begin();
257 // If the using object isn't uniqued, just update the operands. This
258 // handles instructions and initializers for global variables.
259 if (!isa<Constant>(*UI) || isa<GlobalValue>(*UI)) {
260 UI.getUse().set(RealVal);
264 // Otherwise, we have a constant that uses the placeholder. Replace that
265 // constant with a new constant that has *all* placeholder uses updated.
266 Constant *UserC = cast<Constant>(*UI);
267 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
270 if (!isa<ConstantPlaceHolder>(*I)) {
271 // Not a placeholder reference.
273 } else if (*I == Placeholder) {
274 // Common case is that it just references this one placeholder.
277 // Otherwise, look up the placeholder in ResolveConstants.
278 ResolveConstantsTy::iterator It =
279 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
280 std::pair<Constant*, unsigned>(cast<Constant>(*I),
282 assert(It != ResolveConstants.end() && It->first == *I);
283 NewOp = operator[](It->second);
286 NewOps.push_back(cast<Constant>(NewOp));
289 // Make the new constant.
291 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
292 NewC = ConstantArray::get(UserCA->getType(), &NewOps[0],
294 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
295 NewC = ConstantStruct::get(Context, &NewOps[0], NewOps.size(),
296 UserCS->getType()->isPacked());
297 } else if (isa<ConstantVector>(UserC)) {
298 NewC = ConstantVector::get(&NewOps[0], NewOps.size());
300 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
301 NewC = cast<ConstantExpr>(UserC)->getWithOperands(&NewOps[0],
305 UserC->replaceAllUsesWith(NewC);
306 UserC->destroyConstant();
310 // Update all ValueHandles, they should be the only users at this point.
311 Placeholder->replaceAllUsesWith(RealVal);
316 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
325 WeakVH &OldV = MDValuePtrs[Idx];
331 // If there was a forward reference to this value, replace it.
332 Value *PrevVal = OldV;
333 OldV->replaceAllUsesWith(V);
337 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
341 if (Value *V = MDValuePtrs[Idx]) {
342 assert(V->getType() == Type::getMetadataTy(Context) && "Type mismatch in value table!");
346 // Create and return a placeholder, which will later be RAUW'd.
347 Value *V = new Argument(Type::getMetadataTy(Context));
348 MDValuePtrs[Idx] = V;
352 const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
353 // If the TypeID is in range, return it.
354 if (ID < TypeList.size())
355 return TypeList[ID].get();
356 if (!isTypeTable) return 0;
358 // The type table allows forward references. Push as many Opaque types as
359 // needed to get up to ID.
360 while (TypeList.size() <= ID)
361 TypeList.push_back(OpaqueType::get(Context));
362 return TypeList.back().get();
365 //===----------------------------------------------------------------------===//
366 // Functions for parsing blocks from the bitcode file
367 //===----------------------------------------------------------------------===//
369 bool BitcodeReader::ParseAttributeBlock() {
370 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
371 return Error("Malformed block record");
373 if (!MAttributes.empty())
374 return Error("Multiple PARAMATTR blocks found!");
376 SmallVector<uint64_t, 64> Record;
378 SmallVector<AttributeWithIndex, 8> Attrs;
380 // Read all the records.
382 unsigned Code = Stream.ReadCode();
383 if (Code == bitc::END_BLOCK) {
384 if (Stream.ReadBlockEnd())
385 return Error("Error at end of PARAMATTR block");
389 if (Code == bitc::ENTER_SUBBLOCK) {
390 // No known subblocks, always skip them.
391 Stream.ReadSubBlockID();
392 if (Stream.SkipBlock())
393 return Error("Malformed block record");
397 if (Code == bitc::DEFINE_ABBREV) {
398 Stream.ReadAbbrevRecord();
404 switch (Stream.ReadRecord(Code, Record)) {
405 default: // Default behavior: ignore.
407 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
408 if (Record.size() & 1)
409 return Error("Invalid ENTRY record");
411 // FIXME : Remove this autoupgrade code in LLVM 3.0.
412 // If Function attributes are using index 0 then transfer them
413 // to index ~0. Index 0 is used for return value attributes but used to be
414 // used for function attributes.
415 Attributes RetAttribute = Attribute::None;
416 Attributes FnAttribute = Attribute::None;
417 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
418 // FIXME: remove in LLVM 3.0
419 // The alignment is stored as a 16-bit raw value from bits 31--16.
420 // We shift the bits above 31 down by 11 bits.
422 unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
423 if (Alignment && !isPowerOf2_32(Alignment))
424 return Error("Alignment is not a power of two.");
426 Attributes ReconstitutedAttr = Record[i+1] & 0xffff;
428 ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
429 ReconstitutedAttr |= (Record[i+1] & (0xffffull << 32)) >> 11;
430 Record[i+1] = ReconstitutedAttr;
433 RetAttribute = Record[i+1];
434 else if (Record[i] == ~0U)
435 FnAttribute = Record[i+1];
438 unsigned OldRetAttrs = (Attribute::NoUnwind|Attribute::NoReturn|
439 Attribute::ReadOnly|Attribute::ReadNone);
441 if (FnAttribute == Attribute::None && RetAttribute != Attribute::None &&
442 (RetAttribute & OldRetAttrs) != 0) {
443 if (FnAttribute == Attribute::None) { // add a slot so they get added.
444 Record.push_back(~0U);
448 FnAttribute |= RetAttribute & OldRetAttrs;
449 RetAttribute &= ~OldRetAttrs;
452 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
453 if (Record[i] == 0) {
454 if (RetAttribute != Attribute::None)
455 Attrs.push_back(AttributeWithIndex::get(0, RetAttribute));
456 } else if (Record[i] == ~0U) {
457 if (FnAttribute != Attribute::None)
458 Attrs.push_back(AttributeWithIndex::get(~0U, FnAttribute));
459 } else if (Record[i+1] != Attribute::None)
460 Attrs.push_back(AttributeWithIndex::get(Record[i], Record[i+1]));
463 MAttributes.push_back(AttrListPtr::get(Attrs.begin(), Attrs.end()));
472 bool BitcodeReader::ParseTypeTable() {
473 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID))
474 return Error("Malformed block record");
476 if (!TypeList.empty())
477 return Error("Multiple TYPE_BLOCKs found!");
479 SmallVector<uint64_t, 64> Record;
480 unsigned NumRecords = 0;
482 // Read all the records for this type table.
484 unsigned Code = Stream.ReadCode();
485 if (Code == bitc::END_BLOCK) {
486 if (NumRecords != TypeList.size())
487 return Error("Invalid type forward reference in TYPE_BLOCK");
488 if (Stream.ReadBlockEnd())
489 return Error("Error at end of type table block");
493 if (Code == bitc::ENTER_SUBBLOCK) {
494 // No known subblocks, always skip them.
495 Stream.ReadSubBlockID();
496 if (Stream.SkipBlock())
497 return Error("Malformed block record");
501 if (Code == bitc::DEFINE_ABBREV) {
502 Stream.ReadAbbrevRecord();
508 const Type *ResultTy = 0;
509 switch (Stream.ReadRecord(Code, Record)) {
510 default: // Default behavior: unknown type.
513 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
514 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
515 // type list. This allows us to reserve space.
516 if (Record.size() < 1)
517 return Error("Invalid TYPE_CODE_NUMENTRY record");
518 TypeList.reserve(Record[0]);
520 case bitc::TYPE_CODE_VOID: // VOID
521 ResultTy = Type::getVoidTy(Context);
523 case bitc::TYPE_CODE_FLOAT: // FLOAT
524 ResultTy = Type::getFloatTy(Context);
526 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
527 ResultTy = Type::getDoubleTy(Context);
529 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
530 ResultTy = Type::getX86_FP80Ty(Context);
532 case bitc::TYPE_CODE_FP128: // FP128
533 ResultTy = Type::getFP128Ty(Context);
535 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
536 ResultTy = Type::getPPC_FP128Ty(Context);
538 case bitc::TYPE_CODE_LABEL: // LABEL
539 ResultTy = Type::getLabelTy(Context);
541 case bitc::TYPE_CODE_OPAQUE: // OPAQUE
544 case bitc::TYPE_CODE_METADATA: // METADATA
545 ResultTy = Type::getMetadataTy(Context);
547 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
548 if (Record.size() < 1)
549 return Error("Invalid Integer type record");
551 ResultTy = IntegerType::get(Context, Record[0]);
553 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
554 // [pointee type, address space]
555 if (Record.size() < 1)
556 return Error("Invalid POINTER type record");
557 unsigned AddressSpace = 0;
558 if (Record.size() == 2)
559 AddressSpace = Record[1];
560 ResultTy = PointerType::get(getTypeByID(Record[0], true),
564 case bitc::TYPE_CODE_FUNCTION: {
565 // FIXME: attrid is dead, remove it in LLVM 3.0
566 // FUNCTION: [vararg, attrid, retty, paramty x N]
567 if (Record.size() < 3)
568 return Error("Invalid FUNCTION type record");
569 std::vector<const Type*> ArgTys;
570 for (unsigned i = 3, e = Record.size(); i != e; ++i)
571 ArgTys.push_back(getTypeByID(Record[i], true));
573 ResultTy = FunctionType::get(getTypeByID(Record[2], true), ArgTys,
577 case bitc::TYPE_CODE_STRUCT: { // STRUCT: [ispacked, eltty x N]
578 if (Record.size() < 1)
579 return Error("Invalid STRUCT type record");
580 std::vector<const Type*> EltTys;
581 for (unsigned i = 1, e = Record.size(); i != e; ++i)
582 EltTys.push_back(getTypeByID(Record[i], true));
583 ResultTy = StructType::get(Context, EltTys, Record[0]);
586 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
587 if (Record.size() < 2)
588 return Error("Invalid ARRAY type record");
589 ResultTy = ArrayType::get(getTypeByID(Record[1], true), Record[0]);
591 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
592 if (Record.size() < 2)
593 return Error("Invalid VECTOR type record");
594 ResultTy = VectorType::get(getTypeByID(Record[1], true), Record[0]);
598 if (NumRecords == TypeList.size()) {
599 // If this is a new type slot, just append it.
600 TypeList.push_back(ResultTy ? ResultTy : OpaqueType::get(Context));
602 } else if (ResultTy == 0) {
603 // Otherwise, this was forward referenced, so an opaque type was created,
604 // but the result type is actually just an opaque. Leave the one we
605 // created previously.
608 // Otherwise, this was forward referenced, so an opaque type was created.
609 // Resolve the opaque type to the real type now.
610 assert(NumRecords < TypeList.size() && "Typelist imbalance");
611 const OpaqueType *OldTy = cast<OpaqueType>(TypeList[NumRecords++].get());
613 // Don't directly push the new type on the Tab. Instead we want to replace
614 // the opaque type we previously inserted with the new concrete value. The
615 // refinement from the abstract (opaque) type to the new type causes all
616 // uses of the abstract type to use the concrete type (NewTy). This will
617 // also cause the opaque type to be deleted.
618 const_cast<OpaqueType*>(OldTy)->refineAbstractTypeTo(ResultTy);
620 // This should have replaced the old opaque type with the new type in the
621 // value table... or with a preexisting type that was already in the
622 // system. Let's just make sure it did.
623 assert(TypeList[NumRecords-1].get() != OldTy &&
624 "refineAbstractType didn't work!");
630 bool BitcodeReader::ParseTypeSymbolTable() {
631 if (Stream.EnterSubBlock(bitc::TYPE_SYMTAB_BLOCK_ID))
632 return Error("Malformed block record");
634 SmallVector<uint64_t, 64> Record;
636 // Read all the records for this type table.
637 std::string TypeName;
639 unsigned Code = Stream.ReadCode();
640 if (Code == bitc::END_BLOCK) {
641 if (Stream.ReadBlockEnd())
642 return Error("Error at end of type symbol table block");
646 if (Code == bitc::ENTER_SUBBLOCK) {
647 // No known subblocks, always skip them.
648 Stream.ReadSubBlockID();
649 if (Stream.SkipBlock())
650 return Error("Malformed block record");
654 if (Code == bitc::DEFINE_ABBREV) {
655 Stream.ReadAbbrevRecord();
661 switch (Stream.ReadRecord(Code, Record)) {
662 default: // Default behavior: unknown type.
664 case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namechar x N]
665 if (ConvertToString(Record, 1, TypeName))
666 return Error("Invalid TST_ENTRY record");
667 unsigned TypeID = Record[0];
668 if (TypeID >= TypeList.size())
669 return Error("Invalid Type ID in TST_ENTRY record");
671 TheModule->addTypeName(TypeName, TypeList[TypeID].get());
678 bool BitcodeReader::ParseValueSymbolTable() {
679 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
680 return Error("Malformed block record");
682 SmallVector<uint64_t, 64> Record;
684 // Read all the records for this value table.
685 SmallString<128> ValueName;
687 unsigned Code = Stream.ReadCode();
688 if (Code == bitc::END_BLOCK) {
689 if (Stream.ReadBlockEnd())
690 return Error("Error at end of value symbol table block");
693 if (Code == bitc::ENTER_SUBBLOCK) {
694 // No known subblocks, always skip them.
695 Stream.ReadSubBlockID();
696 if (Stream.SkipBlock())
697 return Error("Malformed block record");
701 if (Code == bitc::DEFINE_ABBREV) {
702 Stream.ReadAbbrevRecord();
708 switch (Stream.ReadRecord(Code, Record)) {
709 default: // Default behavior: unknown type.
711 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
712 if (ConvertToString(Record, 1, ValueName))
713 return Error("Invalid VST_ENTRY record");
714 unsigned ValueID = Record[0];
715 if (ValueID >= ValueList.size())
716 return Error("Invalid Value ID in VST_ENTRY record");
717 Value *V = ValueList[ValueID];
719 V->setName(StringRef(ValueName.data(), ValueName.size()));
723 case bitc::VST_CODE_BBENTRY: {
724 if (ConvertToString(Record, 1, ValueName))
725 return Error("Invalid VST_BBENTRY record");
726 BasicBlock *BB = getBasicBlock(Record[0]);
728 return Error("Invalid BB ID in VST_BBENTRY record");
730 BB->setName(StringRef(ValueName.data(), ValueName.size()));
738 bool BitcodeReader::ParseMetadata() {
739 unsigned NextValueNo = MDValueList.size();
741 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
742 return Error("Malformed block record");
744 SmallVector<uint64_t, 64> Record;
746 // Read all the records.
748 unsigned Code = Stream.ReadCode();
749 if (Code == bitc::END_BLOCK) {
750 if (Stream.ReadBlockEnd())
751 return Error("Error at end of PARAMATTR block");
755 if (Code == bitc::ENTER_SUBBLOCK) {
756 // No known subblocks, always skip them.
757 Stream.ReadSubBlockID();
758 if (Stream.SkipBlock())
759 return Error("Malformed block record");
763 if (Code == bitc::DEFINE_ABBREV) {
764 Stream.ReadAbbrevRecord();
770 switch (Stream.ReadRecord(Code, Record)) {
771 default: // Default behavior: ignore.
773 case bitc::METADATA_NAME: {
774 // Read named of the named metadata.
775 unsigned NameLength = Record.size();
777 Name.resize(NameLength);
778 for (unsigned i = 0; i != NameLength; ++i)
781 Code = Stream.ReadCode();
783 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
784 if (Stream.ReadRecord(Code, Record) != bitc::METADATA_NAMED_NODE)
785 assert ( 0 && "Inavlid Named Metadata record");
787 // Read named metadata elements.
788 unsigned Size = Record.size();
789 SmallVector<MetadataBase*, 8> Elts;
790 for (unsigned i = 0; i != Size; ++i) {
791 Value *MD = MDValueList.getValueFwdRef(Record[i]);
792 if (MetadataBase *B = dyn_cast<MetadataBase>(MD))
795 Value *V = NamedMDNode::Create(Context, Name.str(), Elts.data(),
796 Elts.size(), TheModule);
797 MDValueList.AssignValue(V, NextValueNo++);
800 case bitc::METADATA_NODE: {
801 if (Record.empty() || Record.size() % 2 == 1)
802 return Error("Invalid METADATA_NODE record");
804 unsigned Size = Record.size();
805 SmallVector<Value*, 8> Elts;
806 for (unsigned i = 0; i != Size; i += 2) {
807 const Type *Ty = getTypeByID(Record[i], false);
808 if (Ty == Type::getMetadataTy(Context))
809 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
810 else if (Ty != Type::getVoidTy(Context))
811 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
813 Elts.push_back(NULL);
815 Value *V = MDNode::get(Context, &Elts[0], Elts.size());
816 MDValueList.AssignValue(V, NextValueNo++);
819 case bitc::METADATA_STRING: {
820 unsigned MDStringLength = Record.size();
821 SmallString<8> String;
822 String.resize(MDStringLength);
823 for (unsigned i = 0; i != MDStringLength; ++i)
824 String[i] = Record[i];
825 Value *V = MDString::get(Context,
826 StringRef(String.data(), String.size()));
827 MDValueList.AssignValue(V, NextValueNo++);
834 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
835 /// the LSB for dense VBR encoding.
836 static uint64_t DecodeSignRotatedValue(uint64_t V) {
841 // There is no such thing as -0 with integers. "-0" really means MININT.
845 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
846 /// values and aliases that we can.
847 bool BitcodeReader::ResolveGlobalAndAliasInits() {
848 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
849 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
851 GlobalInitWorklist.swap(GlobalInits);
852 AliasInitWorklist.swap(AliasInits);
854 while (!GlobalInitWorklist.empty()) {
855 unsigned ValID = GlobalInitWorklist.back().second;
856 if (ValID >= ValueList.size()) {
857 // Not ready to resolve this yet, it requires something later in the file.
858 GlobalInits.push_back(GlobalInitWorklist.back());
860 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
861 GlobalInitWorklist.back().first->setInitializer(C);
863 return Error("Global variable initializer is not a constant!");
865 GlobalInitWorklist.pop_back();
868 while (!AliasInitWorklist.empty()) {
869 unsigned ValID = AliasInitWorklist.back().second;
870 if (ValID >= ValueList.size()) {
871 AliasInits.push_back(AliasInitWorklist.back());
873 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
874 AliasInitWorklist.back().first->setAliasee(C);
876 return Error("Alias initializer is not a constant!");
878 AliasInitWorklist.pop_back();
883 static void SetOptimizationFlags(Value *V, uint64_t Flags) {
884 if (OverflowingBinaryOperator *OBO =
885 dyn_cast<OverflowingBinaryOperator>(V)) {
886 if (Flags & (1 << bitc::OBO_NO_SIGNED_WRAP))
887 OBO->setHasNoSignedWrap(true);
888 if (Flags & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
889 OBO->setHasNoUnsignedWrap(true);
890 } else if (SDivOperator *Div = dyn_cast<SDivOperator>(V)) {
891 if (Flags & (1 << bitc::SDIV_EXACT))
892 Div->setIsExact(true);
896 bool BitcodeReader::ParseConstants() {
897 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
898 return Error("Malformed block record");
900 SmallVector<uint64_t, 64> Record;
902 // Read all the records for this value table.
903 const Type *CurTy = Type::getInt32Ty(Context);
904 unsigned NextCstNo = ValueList.size();
906 unsigned Code = Stream.ReadCode();
907 if (Code == bitc::END_BLOCK)
910 if (Code == bitc::ENTER_SUBBLOCK) {
911 // No known subblocks, always skip them.
912 Stream.ReadSubBlockID();
913 if (Stream.SkipBlock())
914 return Error("Malformed block record");
918 if (Code == bitc::DEFINE_ABBREV) {
919 Stream.ReadAbbrevRecord();
926 unsigned BitCode = Stream.ReadRecord(Code, Record);
928 default: // Default behavior: unknown constant
929 case bitc::CST_CODE_UNDEF: // UNDEF
930 V = UndefValue::get(CurTy);
932 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
934 return Error("Malformed CST_SETTYPE record");
935 if (Record[0] >= TypeList.size())
936 return Error("Invalid Type ID in CST_SETTYPE record");
937 CurTy = TypeList[Record[0]];
938 continue; // Skip the ValueList manipulation.
939 case bitc::CST_CODE_NULL: // NULL
940 V = Constant::getNullValue(CurTy);
942 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
943 if (!isa<IntegerType>(CurTy) || Record.empty())
944 return Error("Invalid CST_INTEGER record");
945 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
947 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
948 if (!isa<IntegerType>(CurTy) || Record.empty())
949 return Error("Invalid WIDE_INTEGER record");
951 unsigned NumWords = Record.size();
952 SmallVector<uint64_t, 8> Words;
953 Words.resize(NumWords);
954 for (unsigned i = 0; i != NumWords; ++i)
955 Words[i] = DecodeSignRotatedValue(Record[i]);
956 V = ConstantInt::get(Context,
957 APInt(cast<IntegerType>(CurTy)->getBitWidth(),
958 NumWords, &Words[0]));
961 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
963 return Error("Invalid FLOAT record");
964 if (CurTy == Type::getFloatTy(Context))
965 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
966 else if (CurTy == Type::getDoubleTy(Context))
967 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
968 else if (CurTy == Type::getX86_FP80Ty(Context)) {
969 // Bits are not stored the same way as a normal i80 APInt, compensate.
970 uint64_t Rearrange[2];
971 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
972 Rearrange[1] = Record[0] >> 48;
973 V = ConstantFP::get(Context, APFloat(APInt(80, 2, Rearrange)));
974 } else if (CurTy == Type::getFP128Ty(Context))
975 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0]), true));
976 else if (CurTy == Type::getPPC_FP128Ty(Context))
977 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0])));
979 V = UndefValue::get(CurTy);
983 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
985 return Error("Invalid CST_AGGREGATE record");
987 unsigned Size = Record.size();
988 std::vector<Constant*> Elts;
990 if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
991 for (unsigned i = 0; i != Size; ++i)
992 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
993 STy->getElementType(i)));
994 V = ConstantStruct::get(STy, Elts);
995 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
996 const Type *EltTy = ATy->getElementType();
997 for (unsigned i = 0; i != Size; ++i)
998 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
999 V = ConstantArray::get(ATy, Elts);
1000 } else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1001 const Type *EltTy = VTy->getElementType();
1002 for (unsigned i = 0; i != Size; ++i)
1003 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1004 V = ConstantVector::get(Elts);
1006 V = UndefValue::get(CurTy);
1010 case bitc::CST_CODE_STRING: { // STRING: [values]
1012 return Error("Invalid CST_AGGREGATE record");
1014 const ArrayType *ATy = cast<ArrayType>(CurTy);
1015 const Type *EltTy = ATy->getElementType();
1017 unsigned Size = Record.size();
1018 std::vector<Constant*> Elts;
1019 for (unsigned i = 0; i != Size; ++i)
1020 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1021 V = ConstantArray::get(ATy, Elts);
1024 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1026 return Error("Invalid CST_AGGREGATE record");
1028 const ArrayType *ATy = cast<ArrayType>(CurTy);
1029 const Type *EltTy = ATy->getElementType();
1031 unsigned Size = Record.size();
1032 std::vector<Constant*> Elts;
1033 for (unsigned i = 0; i != Size; ++i)
1034 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1035 Elts.push_back(Constant::getNullValue(EltTy));
1036 V = ConstantArray::get(ATy, Elts);
1039 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1040 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1041 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1043 V = UndefValue::get(CurTy); // Unknown binop.
1045 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1046 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1047 V = ConstantExpr::get(Opc, LHS, RHS);
1049 if (Record.size() >= 4)
1050 SetOptimizationFlags(V, Record[3]);
1053 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1054 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1055 int Opc = GetDecodedCastOpcode(Record[0]);
1057 V = UndefValue::get(CurTy); // Unknown cast.
1059 const Type *OpTy = getTypeByID(Record[1]);
1060 if (!OpTy) return Error("Invalid CE_CAST record");
1061 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1062 V = ConstantExpr::getCast(Opc, Op, CurTy);
1066 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1067 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1068 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1069 SmallVector<Constant*, 16> Elts;
1070 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1071 const Type *ElTy = getTypeByID(Record[i]);
1072 if (!ElTy) return Error("Invalid CE_GEP record");
1073 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1075 V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1],
1077 if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
1078 cast<GEPOperator>(V)->setIsInBounds(true);
1081 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1082 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1083 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1084 Type::getInt1Ty(Context)),
1085 ValueList.getConstantFwdRef(Record[1],CurTy),
1086 ValueList.getConstantFwdRef(Record[2],CurTy));
1088 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1089 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1090 const VectorType *OpTy =
1091 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1092 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1093 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1094 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1095 V = ConstantExpr::getExtractElement(Op0, Op1);
1098 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1099 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1100 if (Record.size() < 3 || OpTy == 0)
1101 return Error("Invalid CE_INSERTELT record");
1102 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1103 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1104 OpTy->getElementType());
1105 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1106 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1109 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1110 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1111 if (Record.size() < 3 || OpTy == 0)
1112 return Error("Invalid CE_SHUFFLEVEC record");
1113 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1114 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1115 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1116 OpTy->getNumElements());
1117 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1118 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1121 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1122 const VectorType *RTy = dyn_cast<VectorType>(CurTy);
1123 const VectorType *OpTy = dyn_cast<VectorType>(getTypeByID(Record[0]));
1124 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1125 return Error("Invalid CE_SHUFVEC_EX record");
1126 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1127 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1128 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1129 RTy->getNumElements());
1130 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1131 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1134 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1135 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1136 const Type *OpTy = getTypeByID(Record[0]);
1137 if (OpTy == 0) return Error("Invalid CE_CMP record");
1138 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1139 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1141 if (OpTy->isFloatingPoint())
1142 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1144 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1147 case bitc::CST_CODE_INLINEASM: {
1148 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1149 std::string AsmStr, ConstrStr;
1150 bool HasSideEffects = Record[0];
1151 unsigned AsmStrSize = Record[1];
1152 if (2+AsmStrSize >= Record.size())
1153 return Error("Invalid INLINEASM record");
1154 unsigned ConstStrSize = Record[2+AsmStrSize];
1155 if (3+AsmStrSize+ConstStrSize > Record.size())
1156 return Error("Invalid INLINEASM record");
1158 for (unsigned i = 0; i != AsmStrSize; ++i)
1159 AsmStr += (char)Record[2+i];
1160 for (unsigned i = 0; i != ConstStrSize; ++i)
1161 ConstrStr += (char)Record[3+AsmStrSize+i];
1162 const PointerType *PTy = cast<PointerType>(CurTy);
1163 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1164 AsmStr, ConstrStr, HasSideEffects);
1169 ValueList.AssignValue(V, NextCstNo);
1173 if (NextCstNo != ValueList.size())
1174 return Error("Invalid constant reference!");
1176 if (Stream.ReadBlockEnd())
1177 return Error("Error at end of constants block");
1179 // Once all the constants have been read, go through and resolve forward
1181 ValueList.ResolveConstantForwardRefs();
1185 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1186 /// remember where it is and then skip it. This lets us lazily deserialize the
1188 bool BitcodeReader::RememberAndSkipFunctionBody() {
1189 // Get the function we are talking about.
1190 if (FunctionsWithBodies.empty())
1191 return Error("Insufficient function protos");
1193 Function *Fn = FunctionsWithBodies.back();
1194 FunctionsWithBodies.pop_back();
1196 // Save the current stream state.
1197 uint64_t CurBit = Stream.GetCurrentBitNo();
1198 DeferredFunctionInfo[Fn] = std::make_pair(CurBit, Fn->getLinkage());
1200 // Set the functions linkage to GhostLinkage so we know it is lazily
1202 Fn->setLinkage(GlobalValue::GhostLinkage);
1204 // Skip over the function block for now.
1205 if (Stream.SkipBlock())
1206 return Error("Malformed block record");
1210 bool BitcodeReader::ParseModule(const std::string &ModuleID) {
1211 // Reject multiple MODULE_BLOCK's in a single bitstream.
1213 return Error("Multiple MODULE_BLOCKs in same stream");
1215 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1216 return Error("Malformed block record");
1218 // Otherwise, create the module.
1219 TheModule = new Module(ModuleID, Context);
1221 SmallVector<uint64_t, 64> Record;
1222 std::vector<std::string> SectionTable;
1223 std::vector<std::string> GCTable;
1225 // Read all the records for this module.
1226 while (!Stream.AtEndOfStream()) {
1227 unsigned Code = Stream.ReadCode();
1228 if (Code == bitc::END_BLOCK) {
1229 if (Stream.ReadBlockEnd())
1230 return Error("Error at end of module block");
1232 // Patch the initializers for globals and aliases up.
1233 ResolveGlobalAndAliasInits();
1234 if (!GlobalInits.empty() || !AliasInits.empty())
1235 return Error("Malformed global initializer set");
1236 if (!FunctionsWithBodies.empty())
1237 return Error("Too few function bodies found");
1239 // Look for intrinsic functions which need to be upgraded at some point
1240 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1243 if (UpgradeIntrinsicFunction(FI, NewFn))
1244 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1247 // Force deallocation of memory for these vectors to favor the client that
1248 // want lazy deserialization.
1249 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1250 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1251 std::vector<Function*>().swap(FunctionsWithBodies);
1255 if (Code == bitc::ENTER_SUBBLOCK) {
1256 switch (Stream.ReadSubBlockID()) {
1257 default: // Skip unknown content.
1258 if (Stream.SkipBlock())
1259 return Error("Malformed block record");
1261 case bitc::BLOCKINFO_BLOCK_ID:
1262 if (Stream.ReadBlockInfoBlock())
1263 return Error("Malformed BlockInfoBlock");
1265 case bitc::PARAMATTR_BLOCK_ID:
1266 if (ParseAttributeBlock())
1269 case bitc::TYPE_BLOCK_ID:
1270 if (ParseTypeTable())
1273 case bitc::TYPE_SYMTAB_BLOCK_ID:
1274 if (ParseTypeSymbolTable())
1277 case bitc::VALUE_SYMTAB_BLOCK_ID:
1278 if (ParseValueSymbolTable())
1281 case bitc::CONSTANTS_BLOCK_ID:
1282 if (ParseConstants() || ResolveGlobalAndAliasInits())
1285 case bitc::METADATA_BLOCK_ID:
1286 if (ParseMetadata())
1289 case bitc::FUNCTION_BLOCK_ID:
1290 // If this is the first function body we've seen, reverse the
1291 // FunctionsWithBodies list.
1292 if (!HasReversedFunctionsWithBodies) {
1293 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1294 HasReversedFunctionsWithBodies = true;
1297 if (RememberAndSkipFunctionBody())
1304 if (Code == bitc::DEFINE_ABBREV) {
1305 Stream.ReadAbbrevRecord();
1310 switch (Stream.ReadRecord(Code, Record)) {
1311 default: break; // Default behavior, ignore unknown content.
1312 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1313 if (Record.size() < 1)
1314 return Error("Malformed MODULE_CODE_VERSION");
1315 // Only version #0 is supported so far.
1317 return Error("Unknown bitstream version!");
1319 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1321 if (ConvertToString(Record, 0, S))
1322 return Error("Invalid MODULE_CODE_TRIPLE record");
1323 TheModule->setTargetTriple(S);
1326 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1328 if (ConvertToString(Record, 0, S))
1329 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1330 TheModule->setDataLayout(S);
1333 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1335 if (ConvertToString(Record, 0, S))
1336 return Error("Invalid MODULE_CODE_ASM record");
1337 TheModule->setModuleInlineAsm(S);
1340 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1342 if (ConvertToString(Record, 0, S))
1343 return Error("Invalid MODULE_CODE_DEPLIB record");
1344 TheModule->addLibrary(S);
1347 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1349 if (ConvertToString(Record, 0, S))
1350 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1351 SectionTable.push_back(S);
1354 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1356 if (ConvertToString(Record, 0, S))
1357 return Error("Invalid MODULE_CODE_GCNAME record");
1358 GCTable.push_back(S);
1361 // GLOBALVAR: [pointer type, isconst, initid,
1362 // linkage, alignment, section, visibility, threadlocal]
1363 case bitc::MODULE_CODE_GLOBALVAR: {
1364 if (Record.size() < 6)
1365 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1366 const Type *Ty = getTypeByID(Record[0]);
1367 if (!isa<PointerType>(Ty))
1368 return Error("Global not a pointer type!");
1369 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1370 Ty = cast<PointerType>(Ty)->getElementType();
1372 bool isConstant = Record[1];
1373 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1374 unsigned Alignment = (1 << Record[4]) >> 1;
1375 std::string Section;
1377 if (Record[5]-1 >= SectionTable.size())
1378 return Error("Invalid section ID");
1379 Section = SectionTable[Record[5]-1];
1381 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1382 if (Record.size() > 6)
1383 Visibility = GetDecodedVisibility(Record[6]);
1384 bool isThreadLocal = false;
1385 if (Record.size() > 7)
1386 isThreadLocal = Record[7];
1388 GlobalVariable *NewGV =
1389 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1390 isThreadLocal, AddressSpace);
1391 NewGV->setAlignment(Alignment);
1392 if (!Section.empty())
1393 NewGV->setSection(Section);
1394 NewGV->setVisibility(Visibility);
1395 NewGV->setThreadLocal(isThreadLocal);
1397 ValueList.push_back(NewGV);
1399 // Remember which value to use for the global initializer.
1400 if (unsigned InitID = Record[2])
1401 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1404 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1405 // alignment, section, visibility, gc]
1406 case bitc::MODULE_CODE_FUNCTION: {
1407 if (Record.size() < 8)
1408 return Error("Invalid MODULE_CODE_FUNCTION record");
1409 const Type *Ty = getTypeByID(Record[0]);
1410 if (!isa<PointerType>(Ty))
1411 return Error("Function not a pointer type!");
1412 const FunctionType *FTy =
1413 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1415 return Error("Function not a pointer to function type!");
1417 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1420 Func->setCallingConv(Record[1]);
1421 bool isProto = Record[2];
1422 Func->setLinkage(GetDecodedLinkage(Record[3]));
1423 Func->setAttributes(getAttributes(Record[4]));
1425 Func->setAlignment((1 << Record[5]) >> 1);
1427 if (Record[6]-1 >= SectionTable.size())
1428 return Error("Invalid section ID");
1429 Func->setSection(SectionTable[Record[6]-1]);
1431 Func->setVisibility(GetDecodedVisibility(Record[7]));
1432 if (Record.size() > 8 && Record[8]) {
1433 if (Record[8]-1 > GCTable.size())
1434 return Error("Invalid GC ID");
1435 Func->setGC(GCTable[Record[8]-1].c_str());
1437 ValueList.push_back(Func);
1439 // If this is a function with a body, remember the prototype we are
1440 // creating now, so that we can match up the body with them later.
1442 FunctionsWithBodies.push_back(Func);
1445 // ALIAS: [alias type, aliasee val#, linkage]
1446 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1447 case bitc::MODULE_CODE_ALIAS: {
1448 if (Record.size() < 3)
1449 return Error("Invalid MODULE_ALIAS record");
1450 const Type *Ty = getTypeByID(Record[0]);
1451 if (!isa<PointerType>(Ty))
1452 return Error("Function not a pointer type!");
1454 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1456 // Old bitcode files didn't have visibility field.
1457 if (Record.size() > 3)
1458 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1459 ValueList.push_back(NewGA);
1460 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1463 /// MODULE_CODE_PURGEVALS: [numvals]
1464 case bitc::MODULE_CODE_PURGEVALS:
1465 // Trim down the value list to the specified size.
1466 if (Record.size() < 1 || Record[0] > ValueList.size())
1467 return Error("Invalid MODULE_PURGEVALS record");
1468 ValueList.shrinkTo(Record[0]);
1474 return Error("Premature end of bitstream");
1477 bool BitcodeReader::ParseBitcode() {
1480 if (Buffer->getBufferSize() & 3)
1481 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1483 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1484 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1486 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1487 // The magic number is 0x0B17C0DE stored in little endian.
1488 if (isBitcodeWrapper(BufPtr, BufEnd))
1489 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1490 return Error("Invalid bitcode wrapper header");
1492 StreamFile.init(BufPtr, BufEnd);
1493 Stream.init(StreamFile);
1495 // Sniff for the signature.
1496 if (Stream.Read(8) != 'B' ||
1497 Stream.Read(8) != 'C' ||
1498 Stream.Read(4) != 0x0 ||
1499 Stream.Read(4) != 0xC ||
1500 Stream.Read(4) != 0xE ||
1501 Stream.Read(4) != 0xD)
1502 return Error("Invalid bitcode signature");
1504 // We expect a number of well-defined blocks, though we don't necessarily
1505 // need to understand them all.
1506 while (!Stream.AtEndOfStream()) {
1507 unsigned Code = Stream.ReadCode();
1509 if (Code != bitc::ENTER_SUBBLOCK)
1510 return Error("Invalid record at top-level");
1512 unsigned BlockID = Stream.ReadSubBlockID();
1514 // We only know the MODULE subblock ID.
1516 case bitc::BLOCKINFO_BLOCK_ID:
1517 if (Stream.ReadBlockInfoBlock())
1518 return Error("Malformed BlockInfoBlock");
1520 case bitc::MODULE_BLOCK_ID:
1521 if (ParseModule(Buffer->getBufferIdentifier()))
1525 if (Stream.SkipBlock())
1526 return Error("Malformed block record");
1535 /// ParseFunctionBody - Lazily parse the specified function body block.
1536 bool BitcodeReader::ParseFunctionBody(Function *F) {
1537 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1538 return Error("Malformed block record");
1540 unsigned ModuleValueListSize = ValueList.size();
1542 // Add all the function arguments to the value table.
1543 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1544 ValueList.push_back(I);
1546 unsigned NextValueNo = ValueList.size();
1547 BasicBlock *CurBB = 0;
1548 unsigned CurBBNo = 0;
1550 // Read all the records.
1551 SmallVector<uint64_t, 64> Record;
1553 unsigned Code = Stream.ReadCode();
1554 if (Code == bitc::END_BLOCK) {
1555 if (Stream.ReadBlockEnd())
1556 return Error("Error at end of function block");
1560 if (Code == bitc::ENTER_SUBBLOCK) {
1561 switch (Stream.ReadSubBlockID()) {
1562 default: // Skip unknown content.
1563 if (Stream.SkipBlock())
1564 return Error("Malformed block record");
1566 case bitc::CONSTANTS_BLOCK_ID:
1567 if (ParseConstants()) return true;
1568 NextValueNo = ValueList.size();
1570 case bitc::VALUE_SYMTAB_BLOCK_ID:
1571 if (ParseValueSymbolTable()) return true;
1577 if (Code == bitc::DEFINE_ABBREV) {
1578 Stream.ReadAbbrevRecord();
1585 unsigned BitCode = Stream.ReadRecord(Code, Record);
1587 default: // Default behavior: reject
1588 return Error("Unknown instruction");
1589 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1590 if (Record.size() < 1 || Record[0] == 0)
1591 return Error("Invalid DECLAREBLOCKS record");
1592 // Create all the basic blocks for the function.
1593 FunctionBBs.resize(Record[0]);
1594 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1595 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1596 CurBB = FunctionBBs[0];
1599 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1602 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1603 getValue(Record, OpNum, LHS->getType(), RHS) ||
1604 OpNum+1 > Record.size())
1605 return Error("Invalid BINOP record");
1607 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
1608 if (Opc == -1) return Error("Invalid BINOP record");
1609 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
1610 if (OpNum < Record.size())
1611 SetOptimizationFlags(I, Record[3]);
1614 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
1617 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1618 OpNum+2 != Record.size())
1619 return Error("Invalid CAST record");
1621 const Type *ResTy = getTypeByID(Record[OpNum]);
1622 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
1623 if (Opc == -1 || ResTy == 0)
1624 return Error("Invalid CAST record");
1625 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
1628 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
1629 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
1632 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
1633 return Error("Invalid GEP record");
1635 SmallVector<Value*, 16> GEPIdx;
1636 while (OpNum != Record.size()) {
1638 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1639 return Error("Invalid GEP record");
1640 GEPIdx.push_back(Op);
1643 I = GetElementPtrInst::Create(BasePtr, GEPIdx.begin(), GEPIdx.end());
1644 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
1645 cast<GEPOperator>(I)->setIsInBounds(true);
1649 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
1650 // EXTRACTVAL: [opty, opval, n x indices]
1653 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1654 return Error("Invalid EXTRACTVAL record");
1656 SmallVector<unsigned, 4> EXTRACTVALIdx;
1657 for (unsigned RecSize = Record.size();
1658 OpNum != RecSize; ++OpNum) {
1659 uint64_t Index = Record[OpNum];
1660 if ((unsigned)Index != Index)
1661 return Error("Invalid EXTRACTVAL index");
1662 EXTRACTVALIdx.push_back((unsigned)Index);
1665 I = ExtractValueInst::Create(Agg,
1666 EXTRACTVALIdx.begin(), EXTRACTVALIdx.end());
1670 case bitc::FUNC_CODE_INST_INSERTVAL: {
1671 // INSERTVAL: [opty, opval, opty, opval, n x indices]
1674 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1675 return Error("Invalid INSERTVAL record");
1677 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
1678 return Error("Invalid INSERTVAL record");
1680 SmallVector<unsigned, 4> INSERTVALIdx;
1681 for (unsigned RecSize = Record.size();
1682 OpNum != RecSize; ++OpNum) {
1683 uint64_t Index = Record[OpNum];
1684 if ((unsigned)Index != Index)
1685 return Error("Invalid INSERTVAL index");
1686 INSERTVALIdx.push_back((unsigned)Index);
1689 I = InsertValueInst::Create(Agg, Val,
1690 INSERTVALIdx.begin(), INSERTVALIdx.end());
1694 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
1695 // obsolete form of select
1696 // handles select i1 ... in old bitcode
1698 Value *TrueVal, *FalseVal, *Cond;
1699 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
1700 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
1701 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
1702 return Error("Invalid SELECT record");
1704 I = SelectInst::Create(Cond, TrueVal, FalseVal);
1708 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
1709 // new form of select
1710 // handles select i1 or select [N x i1]
1712 Value *TrueVal, *FalseVal, *Cond;
1713 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
1714 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
1715 getValueTypePair(Record, OpNum, NextValueNo, Cond))
1716 return Error("Invalid SELECT record");
1718 // select condition can be either i1 or [N x i1]
1719 if (const VectorType* vector_type =
1720 dyn_cast<const VectorType>(Cond->getType())) {
1722 if (vector_type->getElementType() != Type::getInt1Ty(Context))
1723 return Error("Invalid SELECT condition type");
1726 if (Cond->getType() != Type::getInt1Ty(Context))
1727 return Error("Invalid SELECT condition type");
1730 I = SelectInst::Create(Cond, TrueVal, FalseVal);
1734 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
1737 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
1738 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
1739 return Error("Invalid EXTRACTELT record");
1740 I = ExtractElementInst::Create(Vec, Idx);
1744 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
1746 Value *Vec, *Elt, *Idx;
1747 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
1748 getValue(Record, OpNum,
1749 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
1750 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
1751 return Error("Invalid INSERTELT record");
1752 I = InsertElementInst::Create(Vec, Elt, Idx);
1756 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
1758 Value *Vec1, *Vec2, *Mask;
1759 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
1760 getValue(Record, OpNum, Vec1->getType(), Vec2))
1761 return Error("Invalid SHUFFLEVEC record");
1763 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
1764 return Error("Invalid SHUFFLEVEC record");
1765 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
1769 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
1770 // Old form of ICmp/FCmp returning bool
1771 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
1772 // both legal on vectors but had different behaviour.
1773 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
1774 // FCmp/ICmp returning bool or vector of bool
1778 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1779 getValue(Record, OpNum, LHS->getType(), RHS) ||
1780 OpNum+1 != Record.size())
1781 return Error("Invalid CMP record");
1783 if (LHS->getType()->isFPOrFPVector())
1784 I = new FCmpInst(Context, (FCmpInst::Predicate)Record[OpNum], LHS, RHS);
1786 I = new ICmpInst(Context, (ICmpInst::Predicate)Record[OpNum], LHS, RHS);
1790 case bitc::FUNC_CODE_INST_GETRESULT: { // GETRESULT: [ty, val, n]
1791 if (Record.size() != 2)
1792 return Error("Invalid GETRESULT record");
1795 getValueTypePair(Record, OpNum, NextValueNo, Op);
1796 unsigned Index = Record[1];
1797 I = ExtractValueInst::Create(Op, Index);
1801 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
1803 unsigned Size = Record.size();
1805 I = ReturnInst::Create(Context);
1810 SmallVector<Value *,4> Vs;
1813 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1814 return Error("Invalid RET record");
1816 } while(OpNum != Record.size());
1818 const Type *ReturnType = F->getReturnType();
1819 if (Vs.size() > 1 ||
1820 (isa<StructType>(ReturnType) &&
1821 (Vs.empty() || Vs[0]->getType() != ReturnType))) {
1822 Value *RV = UndefValue::get(ReturnType);
1823 for (unsigned i = 0, e = Vs.size(); i != e; ++i) {
1824 I = InsertValueInst::Create(RV, Vs[i], i, "mrv");
1825 CurBB->getInstList().push_back(I);
1826 ValueList.AssignValue(I, NextValueNo++);
1829 I = ReturnInst::Create(Context, RV);
1833 I = ReturnInst::Create(Context, Vs[0]);
1836 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
1837 if (Record.size() != 1 && Record.size() != 3)
1838 return Error("Invalid BR record");
1839 BasicBlock *TrueDest = getBasicBlock(Record[0]);
1841 return Error("Invalid BR record");
1843 if (Record.size() == 1)
1844 I = BranchInst::Create(TrueDest);
1846 BasicBlock *FalseDest = getBasicBlock(Record[1]);
1847 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
1848 if (FalseDest == 0 || Cond == 0)
1849 return Error("Invalid BR record");
1850 I = BranchInst::Create(TrueDest, FalseDest, Cond);
1854 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, opval, n, n x ops]
1855 if (Record.size() < 3 || (Record.size() & 1) == 0)
1856 return Error("Invalid SWITCH record");
1857 const Type *OpTy = getTypeByID(Record[0]);
1858 Value *Cond = getFnValueByID(Record[1], OpTy);
1859 BasicBlock *Default = getBasicBlock(Record[2]);
1860 if (OpTy == 0 || Cond == 0 || Default == 0)
1861 return Error("Invalid SWITCH record");
1862 unsigned NumCases = (Record.size()-3)/2;
1863 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
1864 for (unsigned i = 0, e = NumCases; i != e; ++i) {
1865 ConstantInt *CaseVal =
1866 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
1867 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
1868 if (CaseVal == 0 || DestBB == 0) {
1870 return Error("Invalid SWITCH record!");
1872 SI->addCase(CaseVal, DestBB);
1878 case bitc::FUNC_CODE_INST_INVOKE: {
1879 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
1880 if (Record.size() < 4) return Error("Invalid INVOKE record");
1881 AttrListPtr PAL = getAttributes(Record[0]);
1882 unsigned CCInfo = Record[1];
1883 BasicBlock *NormalBB = getBasicBlock(Record[2]);
1884 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
1888 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
1889 return Error("Invalid INVOKE record");
1891 const PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
1892 const FunctionType *FTy = !CalleeTy ? 0 :
1893 dyn_cast<FunctionType>(CalleeTy->getElementType());
1895 // Check that the right number of fixed parameters are here.
1896 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
1897 Record.size() < OpNum+FTy->getNumParams())
1898 return Error("Invalid INVOKE record");
1900 SmallVector<Value*, 16> Ops;
1901 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
1902 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
1903 if (Ops.back() == 0) return Error("Invalid INVOKE record");
1906 if (!FTy->isVarArg()) {
1907 if (Record.size() != OpNum)
1908 return Error("Invalid INVOKE record");
1910 // Read type/value pairs for varargs params.
1911 while (OpNum != Record.size()) {
1913 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1914 return Error("Invalid INVOKE record");
1919 I = InvokeInst::Create(Callee, NormalBB, UnwindBB,
1920 Ops.begin(), Ops.end());
1921 cast<InvokeInst>(I)->setCallingConv(CCInfo);
1922 cast<InvokeInst>(I)->setAttributes(PAL);
1925 case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
1926 I = new UnwindInst(Context);
1928 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
1929 I = new UnreachableInst(Context);
1931 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
1932 if (Record.size() < 1 || ((Record.size()-1)&1))
1933 return Error("Invalid PHI record");
1934 const Type *Ty = getTypeByID(Record[0]);
1935 if (!Ty) return Error("Invalid PHI record");
1937 PHINode *PN = PHINode::Create(Ty);
1938 PN->reserveOperandSpace((Record.size()-1)/2);
1940 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
1941 Value *V = getFnValueByID(Record[1+i], Ty);
1942 BasicBlock *BB = getBasicBlock(Record[2+i]);
1943 if (!V || !BB) return Error("Invalid PHI record");
1944 PN->addIncoming(V, BB);
1950 case bitc::FUNC_CODE_INST_MALLOC: { // MALLOC: [instty, op, align]
1951 if (Record.size() < 3)
1952 return Error("Invalid MALLOC record");
1953 const PointerType *Ty =
1954 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
1955 Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
1956 unsigned Align = Record[2];
1957 if (!Ty || !Size) return Error("Invalid MALLOC record");
1958 I = new MallocInst(Ty->getElementType(), Size, (1 << Align) >> 1);
1961 case bitc::FUNC_CODE_INST_FREE: { // FREE: [op, opty]
1964 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1965 OpNum != Record.size())
1966 return Error("Invalid FREE record");
1967 I = new FreeInst(Op);
1970 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, op, align]
1971 if (Record.size() < 3)
1972 return Error("Invalid ALLOCA record");
1973 const PointerType *Ty =
1974 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
1975 Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
1976 unsigned Align = Record[2];
1977 if (!Ty || !Size) return Error("Invalid ALLOCA record");
1978 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
1981 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
1984 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1985 OpNum+2 != Record.size())
1986 return Error("Invalid LOAD record");
1988 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
1991 case bitc::FUNC_CODE_INST_STORE2: { // STORE2:[ptrty, ptr, val, align, vol]
1994 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
1995 getValue(Record, OpNum,
1996 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
1997 OpNum+2 != Record.size())
1998 return Error("Invalid STORE record");
2000 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2003 case bitc::FUNC_CODE_INST_STORE: { // STORE:[val, valty, ptr, align, vol]
2004 // FIXME: Legacy form of store instruction. Should be removed in LLVM 3.0.
2007 if (getValueTypePair(Record, OpNum, NextValueNo, Val) ||
2008 getValue(Record, OpNum,
2009 PointerType::getUnqual(Val->getType()), Ptr)||
2010 OpNum+2 != Record.size())
2011 return Error("Invalid STORE record");
2013 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2016 case bitc::FUNC_CODE_INST_CALL: {
2017 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2018 if (Record.size() < 3)
2019 return Error("Invalid CALL record");
2021 AttrListPtr PAL = getAttributes(Record[0]);
2022 unsigned CCInfo = Record[1];
2026 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2027 return Error("Invalid CALL record");
2029 const PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2030 const FunctionType *FTy = 0;
2031 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2032 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2033 return Error("Invalid CALL record");
2035 SmallVector<Value*, 16> Args;
2036 // Read the fixed params.
2037 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2038 if (FTy->getParamType(i)->getTypeID()==Type::LabelTyID)
2039 Args.push_back(getBasicBlock(Record[OpNum]));
2041 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2042 if (Args.back() == 0) return Error("Invalid CALL record");
2045 // Read type/value pairs for varargs params.
2046 if (!FTy->isVarArg()) {
2047 if (OpNum != Record.size())
2048 return Error("Invalid CALL record");
2050 while (OpNum != Record.size()) {
2052 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2053 return Error("Invalid CALL record");
2058 I = CallInst::Create(Callee, Args.begin(), Args.end());
2059 cast<CallInst>(I)->setCallingConv(CCInfo>>1);
2060 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2061 cast<CallInst>(I)->setAttributes(PAL);
2064 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2065 if (Record.size() < 3)
2066 return Error("Invalid VAARG record");
2067 const Type *OpTy = getTypeByID(Record[0]);
2068 Value *Op = getFnValueByID(Record[1], OpTy);
2069 const Type *ResTy = getTypeByID(Record[2]);
2070 if (!OpTy || !Op || !ResTy)
2071 return Error("Invalid VAARG record");
2072 I = new VAArgInst(Op, ResTy);
2077 // Add instruction to end of current BB. If there is no current BB, reject
2081 return Error("Invalid instruction with no BB");
2083 CurBB->getInstList().push_back(I);
2085 // If this was a terminator instruction, move to the next block.
2086 if (isa<TerminatorInst>(I)) {
2088 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2091 // Non-void values get registered in the value table for future use.
2092 if (I && I->getType() != Type::getVoidTy(Context))
2093 ValueList.AssignValue(I, NextValueNo++);
2096 // Check the function list for unresolved values.
2097 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2098 if (A->getParent() == 0) {
2099 // We found at least one unresolved value. Nuke them all to avoid leaks.
2100 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2101 if ((A = dyn_cast<Argument>(ValueList.back())) && A->getParent() == 0) {
2102 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2106 return Error("Never resolved value found in function!");
2110 // Trim the value list down to the size it was before we parsed this function.
2111 ValueList.shrinkTo(ModuleValueListSize);
2112 std::vector<BasicBlock*>().swap(FunctionBBs);
2117 //===----------------------------------------------------------------------===//
2118 // ModuleProvider implementation
2119 //===----------------------------------------------------------------------===//
2122 bool BitcodeReader::materializeFunction(Function *F, std::string *ErrInfo) {
2123 // If it already is material, ignore the request.
2124 if (!F->hasNotBeenReadFromBitcode()) return false;
2126 DenseMap<Function*, std::pair<uint64_t, unsigned> >::iterator DFII =
2127 DeferredFunctionInfo.find(F);
2128 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2130 // Move the bit stream to the saved position of the deferred function body and
2131 // restore the real linkage type for the function.
2132 Stream.JumpToBit(DFII->second.first);
2133 F->setLinkage((GlobalValue::LinkageTypes)DFII->second.second);
2135 if (ParseFunctionBody(F)) {
2136 if (ErrInfo) *ErrInfo = ErrorString;
2140 // Upgrade any old intrinsic calls in the function.
2141 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2142 E = UpgradedIntrinsics.end(); I != E; ++I) {
2143 if (I->first != I->second) {
2144 for (Value::use_iterator UI = I->first->use_begin(),
2145 UE = I->first->use_end(); UI != UE; ) {
2146 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2147 UpgradeIntrinsicCall(CI, I->second);
2155 void BitcodeReader::dematerializeFunction(Function *F) {
2156 // If this function isn't materialized, or if it is a proto, this is a noop.
2157 if (F->hasNotBeenReadFromBitcode() || F->isDeclaration())
2160 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2162 // Just forget the function body, we can remat it later.
2164 F->setLinkage(GlobalValue::GhostLinkage);
2168 Module *BitcodeReader::materializeModule(std::string *ErrInfo) {
2169 // Iterate over the module, deserializing any functions that are still on
2171 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2173 if (F->hasNotBeenReadFromBitcode() &&
2174 materializeFunction(F, ErrInfo))
2177 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2178 // delete the old functions to clean up. We can't do this unless the entire
2179 // module is materialized because there could always be another function body
2180 // with calls to the old function.
2181 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2182 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2183 if (I->first != I->second) {
2184 for (Value::use_iterator UI = I->first->use_begin(),
2185 UE = I->first->use_end(); UI != UE; ) {
2186 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2187 UpgradeIntrinsicCall(CI, I->second);
2189 if (!I->first->use_empty())
2190 I->first->replaceAllUsesWith(I->second);
2191 I->first->eraseFromParent();
2194 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2200 /// This method is provided by the parent ModuleProvde class and overriden
2201 /// here. It simply releases the module from its provided and frees up our
2203 /// @brief Release our hold on the generated module
2204 Module *BitcodeReader::releaseModule(std::string *ErrInfo) {
2205 // Since we're losing control of this Module, we must hand it back complete
2206 Module *M = ModuleProvider::releaseModule(ErrInfo);
2212 //===----------------------------------------------------------------------===//
2213 // External interface
2214 //===----------------------------------------------------------------------===//
2216 /// getBitcodeModuleProvider - lazy function-at-a-time loading from a file.
2218 ModuleProvider *llvm::getBitcodeModuleProvider(MemoryBuffer *Buffer,
2219 LLVMContext& Context,
2220 std::string *ErrMsg) {
2221 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2222 if (R->ParseBitcode()) {
2224 *ErrMsg = R->getErrorString();
2226 // Don't let the BitcodeReader dtor delete 'Buffer'.
2227 R->releaseMemoryBuffer();
2234 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2235 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2236 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2237 std::string *ErrMsg){
2239 R = static_cast<BitcodeReader*>(getBitcodeModuleProvider(Buffer, Context,
2243 // Read in the entire module.
2244 Module *M = R->materializeModule(ErrMsg);
2246 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2247 // there was an error.
2248 R->releaseMemoryBuffer();
2250 // If there was no error, tell ModuleProvider not to delete it when its dtor
2253 M = R->releaseModule(ErrMsg);