1 //===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This header defines the BitcodeReader class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Bitcode/ReaderWriter.h"
15 #include "BitcodeReader.h"
16 #include "llvm/Constants.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/InlineAsm.h"
19 #include "llvm/IntrinsicInst.h"
20 #include "llvm/Module.h"
21 #include "llvm/Operator.h"
22 #include "llvm/AutoUpgrade.h"
23 #include "llvm/ADT/SmallString.h"
24 #include "llvm/ADT/SmallVector.h"
25 #include "llvm/Support/MathExtras.h"
26 #include "llvm/Support/MemoryBuffer.h"
27 #include "llvm/OperandTraits.h"
30 void BitcodeReader::FreeState() {
34 std::vector<PATypeHolder>().swap(TypeList);
38 std::vector<AttrListPtr>().swap(MAttributes);
39 std::vector<BasicBlock*>().swap(FunctionBBs);
40 std::vector<Function*>().swap(FunctionsWithBodies);
41 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;
79 case 14: return GlobalValue::LinkerPrivateWeakLinkage;
80 case 15: return GlobalValue::LinkerPrivateWeakDefAutoLinkage;
84 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
86 default: // Map unknown visibilities to default.
87 case 0: return GlobalValue::DefaultVisibility;
88 case 1: return GlobalValue::HiddenVisibility;
89 case 2: return GlobalValue::ProtectedVisibility;
93 static int GetDecodedCastOpcode(unsigned Val) {
96 case bitc::CAST_TRUNC : return Instruction::Trunc;
97 case bitc::CAST_ZEXT : return Instruction::ZExt;
98 case bitc::CAST_SEXT : return Instruction::SExt;
99 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
100 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
101 case bitc::CAST_UITOFP : return Instruction::UIToFP;
102 case bitc::CAST_SITOFP : return Instruction::SIToFP;
103 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
104 case bitc::CAST_FPEXT : return Instruction::FPExt;
105 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
106 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
107 case bitc::CAST_BITCAST : return Instruction::BitCast;
110 static int GetDecodedBinaryOpcode(unsigned Val, const Type *Ty) {
113 case bitc::BINOP_ADD:
114 return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
115 case bitc::BINOP_SUB:
116 return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
117 case bitc::BINOP_MUL:
118 return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
119 case bitc::BINOP_UDIV: return Instruction::UDiv;
120 case bitc::BINOP_SDIV:
121 return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
122 case bitc::BINOP_UREM: return Instruction::URem;
123 case bitc::BINOP_SREM:
124 return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
125 case bitc::BINOP_SHL: return Instruction::Shl;
126 case bitc::BINOP_LSHR: return Instruction::LShr;
127 case bitc::BINOP_ASHR: return Instruction::AShr;
128 case bitc::BINOP_AND: return Instruction::And;
129 case bitc::BINOP_OR: return Instruction::Or;
130 case bitc::BINOP_XOR: return Instruction::Xor;
136 /// @brief A class for maintaining the slot number definition
137 /// as a placeholder for the actual definition for forward constants defs.
138 class ConstantPlaceHolder : public ConstantExpr {
139 void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
141 // allocate space for exactly one operand
142 void *operator new(size_t s) {
143 return User::operator new(s, 1);
145 explicit ConstantPlaceHolder(const Type *Ty, LLVMContext& Context)
146 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
147 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
150 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
151 //static inline bool classof(const ConstantPlaceHolder *) { return true; }
152 static bool classof(const Value *V) {
153 return isa<ConstantExpr>(V) &&
154 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
158 /// Provide fast operand accessors
159 //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
163 // FIXME: can we inherit this from ConstantExpr?
165 struct OperandTraits<ConstantPlaceHolder> : public FixedNumOperandTraits<1> {
170 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
179 WeakVH &OldV = ValuePtrs[Idx];
185 // Handle constants and non-constants (e.g. instrs) differently for
187 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
188 ResolveConstants.push_back(std::make_pair(PHC, Idx));
191 // If there was a forward reference to this value, replace it.
192 Value *PrevVal = OldV;
193 OldV->replaceAllUsesWith(V);
199 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
204 if (Value *V = ValuePtrs[Idx]) {
205 assert(Ty == V->getType() && "Type mismatch in constant table!");
206 return cast<Constant>(V);
209 // Create and return a placeholder, which will later be RAUW'd.
210 Constant *C = new ConstantPlaceHolder(Ty, Context);
215 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, const Type *Ty) {
219 if (Value *V = ValuePtrs[Idx]) {
220 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
224 // No type specified, must be invalid reference.
225 if (Ty == 0) return 0;
227 // Create and return a placeholder, which will later be RAUW'd.
228 Value *V = new Argument(Ty);
233 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
234 /// resolves any forward references. The idea behind this is that we sometimes
235 /// get constants (such as large arrays) which reference *many* forward ref
236 /// constants. Replacing each of these causes a lot of thrashing when
237 /// building/reuniquing the constant. Instead of doing this, we look at all the
238 /// uses and rewrite all the place holders at once for any constant that uses
240 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
241 // Sort the values by-pointer so that they are efficient to look up with a
243 std::sort(ResolveConstants.begin(), ResolveConstants.end());
245 SmallVector<Constant*, 64> NewOps;
247 while (!ResolveConstants.empty()) {
248 Value *RealVal = operator[](ResolveConstants.back().second);
249 Constant *Placeholder = ResolveConstants.back().first;
250 ResolveConstants.pop_back();
252 // Loop over all users of the placeholder, updating them to reference the
253 // new value. If they reference more than one placeholder, update them all
255 while (!Placeholder->use_empty()) {
256 Value::use_iterator UI = Placeholder->use_begin();
259 // If the using object isn't uniqued, just update the operands. This
260 // handles instructions and initializers for global variables.
261 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
262 UI.getUse().set(RealVal);
266 // Otherwise, we have a constant that uses the placeholder. Replace that
267 // constant with a new constant that has *all* placeholder uses updated.
268 Constant *UserC = cast<Constant>(U);
269 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
272 if (!isa<ConstantPlaceHolder>(*I)) {
273 // Not a placeholder reference.
275 } else if (*I == Placeholder) {
276 // Common case is that it just references this one placeholder.
279 // Otherwise, look up the placeholder in ResolveConstants.
280 ResolveConstantsTy::iterator It =
281 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
282 std::pair<Constant*, unsigned>(cast<Constant>(*I),
284 assert(It != ResolveConstants.end() && It->first == *I);
285 NewOp = operator[](It->second);
288 NewOps.push_back(cast<Constant>(NewOp));
291 // Make the new constant.
293 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
294 NewC = ConstantArray::get(UserCA->getType(), &NewOps[0],
296 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
297 NewC = ConstantStruct::get(Context, &NewOps[0], NewOps.size(),
298 UserCS->getType()->isPacked());
299 } else if (isa<ConstantVector>(UserC)) {
300 NewC = ConstantVector::get(&NewOps[0], NewOps.size());
302 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
303 NewC = cast<ConstantExpr>(UserC)->getWithOperands(&NewOps[0],
307 UserC->replaceAllUsesWith(NewC);
308 UserC->destroyConstant();
312 // Update all ValueHandles, they should be the only users at this point.
313 Placeholder->replaceAllUsesWith(RealVal);
318 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
327 WeakVH &OldV = MDValuePtrs[Idx];
333 // If there was a forward reference to this value, replace it.
334 MDNode *PrevVal = cast<MDNode>(OldV);
335 OldV->replaceAllUsesWith(V);
336 MDNode::deleteTemporary(PrevVal);
337 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
339 MDValuePtrs[Idx] = V;
342 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
346 if (Value *V = MDValuePtrs[Idx]) {
347 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
351 // Create and return a placeholder, which will later be RAUW'd.
352 Value *V = MDNode::getTemporary(Context, 0, 0);
353 MDValuePtrs[Idx] = V;
357 const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
358 // If the TypeID is in range, return it.
359 if (ID < TypeList.size())
360 return TypeList[ID].get();
361 if (!isTypeTable) return 0;
363 // The type table allows forward references. Push as many Opaque types as
364 // needed to get up to ID.
365 while (TypeList.size() <= ID)
366 TypeList.push_back(OpaqueType::get(Context));
367 return TypeList.back().get();
370 //===----------------------------------------------------------------------===//
371 // Functions for parsing blocks from the bitcode file
372 //===----------------------------------------------------------------------===//
374 bool BitcodeReader::ParseAttributeBlock() {
375 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
376 return Error("Malformed block record");
378 if (!MAttributes.empty())
379 return Error("Multiple PARAMATTR blocks found!");
381 SmallVector<uint64_t, 64> Record;
383 SmallVector<AttributeWithIndex, 8> Attrs;
385 // Read all the records.
387 unsigned Code = Stream.ReadCode();
388 if (Code == bitc::END_BLOCK) {
389 if (Stream.ReadBlockEnd())
390 return Error("Error at end of PARAMATTR block");
394 if (Code == bitc::ENTER_SUBBLOCK) {
395 // No known subblocks, always skip them.
396 Stream.ReadSubBlockID();
397 if (Stream.SkipBlock())
398 return Error("Malformed block record");
402 if (Code == bitc::DEFINE_ABBREV) {
403 Stream.ReadAbbrevRecord();
409 switch (Stream.ReadRecord(Code, Record)) {
410 default: // Default behavior: ignore.
412 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
413 if (Record.size() & 1)
414 return Error("Invalid ENTRY record");
416 // FIXME : Remove this autoupgrade code in LLVM 3.0.
417 // If Function attributes are using index 0 then transfer them
418 // to index ~0. Index 0 is used for return value attributes but used to be
419 // used for function attributes.
420 Attributes RetAttribute = Attribute::None;
421 Attributes FnAttribute = Attribute::None;
422 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
423 // FIXME: remove in LLVM 3.0
424 // The alignment is stored as a 16-bit raw value from bits 31--16.
425 // We shift the bits above 31 down by 11 bits.
427 unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
428 if (Alignment && !isPowerOf2_32(Alignment))
429 return Error("Alignment is not a power of two.");
431 Attributes ReconstitutedAttr = Record[i+1] & 0xffff;
433 ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
434 ReconstitutedAttr |= (Record[i+1] & (0xffffull << 32)) >> 11;
435 Record[i+1] = ReconstitutedAttr;
438 RetAttribute = Record[i+1];
439 else if (Record[i] == ~0U)
440 FnAttribute = Record[i+1];
443 unsigned OldRetAttrs = (Attribute::NoUnwind|Attribute::NoReturn|
444 Attribute::ReadOnly|Attribute::ReadNone);
446 if (FnAttribute == Attribute::None && RetAttribute != Attribute::None &&
447 (RetAttribute & OldRetAttrs) != 0) {
448 if (FnAttribute == Attribute::None) { // add a slot so they get added.
449 Record.push_back(~0U);
453 FnAttribute |= RetAttribute & OldRetAttrs;
454 RetAttribute &= ~OldRetAttrs;
457 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
458 if (Record[i] == 0) {
459 if (RetAttribute != Attribute::None)
460 Attrs.push_back(AttributeWithIndex::get(0, RetAttribute));
461 } else if (Record[i] == ~0U) {
462 if (FnAttribute != Attribute::None)
463 Attrs.push_back(AttributeWithIndex::get(~0U, FnAttribute));
464 } else if (Record[i+1] != Attribute::None)
465 Attrs.push_back(AttributeWithIndex::get(Record[i], Record[i+1]));
468 MAttributes.push_back(AttrListPtr::get(Attrs.begin(), Attrs.end()));
477 bool BitcodeReader::ParseTypeTable() {
478 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID))
479 return Error("Malformed block record");
481 if (!TypeList.empty())
482 return Error("Multiple TYPE_BLOCKs found!");
484 SmallVector<uint64_t, 64> Record;
485 unsigned NumRecords = 0;
487 // Read all the records for this type table.
489 unsigned Code = Stream.ReadCode();
490 if (Code == bitc::END_BLOCK) {
491 if (NumRecords != TypeList.size())
492 return Error("Invalid type forward reference in TYPE_BLOCK");
493 if (Stream.ReadBlockEnd())
494 return Error("Error at end of type table block");
498 if (Code == bitc::ENTER_SUBBLOCK) {
499 // No known subblocks, always skip them.
500 Stream.ReadSubBlockID();
501 if (Stream.SkipBlock())
502 return Error("Malformed block record");
506 if (Code == bitc::DEFINE_ABBREV) {
507 Stream.ReadAbbrevRecord();
513 const Type *ResultTy = 0;
514 switch (Stream.ReadRecord(Code, Record)) {
515 default: // Default behavior: unknown type.
518 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
519 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
520 // type list. This allows us to reserve space.
521 if (Record.size() < 1)
522 return Error("Invalid TYPE_CODE_NUMENTRY record");
523 TypeList.reserve(Record[0]);
525 case bitc::TYPE_CODE_VOID: // VOID
526 ResultTy = Type::getVoidTy(Context);
528 case bitc::TYPE_CODE_FLOAT: // FLOAT
529 ResultTy = Type::getFloatTy(Context);
531 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
532 ResultTy = Type::getDoubleTy(Context);
534 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
535 ResultTy = Type::getX86_FP80Ty(Context);
537 case bitc::TYPE_CODE_FP128: // FP128
538 ResultTy = Type::getFP128Ty(Context);
540 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
541 ResultTy = Type::getPPC_FP128Ty(Context);
543 case bitc::TYPE_CODE_LABEL: // LABEL
544 ResultTy = Type::getLabelTy(Context);
546 case bitc::TYPE_CODE_OPAQUE: // OPAQUE
549 case bitc::TYPE_CODE_METADATA: // METADATA
550 ResultTy = Type::getMetadataTy(Context);
552 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
553 ResultTy = Type::getX86_MMXTy(Context);
555 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
556 if (Record.size() < 1)
557 return Error("Invalid Integer type record");
559 ResultTy = IntegerType::get(Context, Record[0]);
561 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
562 // [pointee type, address space]
563 if (Record.size() < 1)
564 return Error("Invalid POINTER type record");
565 unsigned AddressSpace = 0;
566 if (Record.size() == 2)
567 AddressSpace = Record[1];
568 ResultTy = PointerType::get(getTypeByID(Record[0], true),
572 case bitc::TYPE_CODE_FUNCTION: {
573 // FIXME: attrid is dead, remove it in LLVM 3.0
574 // FUNCTION: [vararg, attrid, retty, paramty x N]
575 if (Record.size() < 3)
576 return Error("Invalid FUNCTION type record");
577 std::vector<const Type*> ArgTys;
578 for (unsigned i = 3, e = Record.size(); i != e; ++i)
579 ArgTys.push_back(getTypeByID(Record[i], true));
581 ResultTy = FunctionType::get(getTypeByID(Record[2], true), ArgTys,
585 case bitc::TYPE_CODE_STRUCT: { // STRUCT: [ispacked, eltty x N]
586 if (Record.size() < 1)
587 return Error("Invalid STRUCT type record");
588 std::vector<const Type*> EltTys;
589 for (unsigned i = 1, e = Record.size(); i != e; ++i)
590 EltTys.push_back(getTypeByID(Record[i], true));
591 ResultTy = StructType::get(Context, EltTys, Record[0]);
594 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
595 if (Record.size() < 2)
596 return Error("Invalid ARRAY type record");
597 ResultTy = ArrayType::get(getTypeByID(Record[1], true), Record[0]);
599 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
600 if (Record.size() < 2)
601 return Error("Invalid VECTOR type record");
602 ResultTy = VectorType::get(getTypeByID(Record[1], true), Record[0]);
606 if (NumRecords == TypeList.size()) {
607 // If this is a new type slot, just append it.
608 TypeList.push_back(ResultTy ? ResultTy : OpaqueType::get(Context));
610 } else if (ResultTy == 0) {
611 // Otherwise, this was forward referenced, so an opaque type was created,
612 // but the result type is actually just an opaque. Leave the one we
613 // created previously.
616 // Otherwise, this was forward referenced, so an opaque type was created.
617 // Resolve the opaque type to the real type now.
618 assert(NumRecords < TypeList.size() && "Typelist imbalance");
619 const OpaqueType *OldTy = cast<OpaqueType>(TypeList[NumRecords++].get());
621 // Don't directly push the new type on the Tab. Instead we want to replace
622 // the opaque type we previously inserted with the new concrete value. The
623 // refinement from the abstract (opaque) type to the new type causes all
624 // uses of the abstract type to use the concrete type (NewTy). This will
625 // also cause the opaque type to be deleted.
626 const_cast<OpaqueType*>(OldTy)->refineAbstractTypeTo(ResultTy);
628 // This should have replaced the old opaque type with the new type in the
629 // value table... or with a preexisting type that was already in the
630 // system. Let's just make sure it did.
631 assert(TypeList[NumRecords-1].get() != OldTy &&
632 "refineAbstractType didn't work!");
638 bool BitcodeReader::ParseTypeSymbolTable() {
639 if (Stream.EnterSubBlock(bitc::TYPE_SYMTAB_BLOCK_ID))
640 return Error("Malformed block record");
642 SmallVector<uint64_t, 64> Record;
644 // Read all the records for this type table.
645 std::string TypeName;
647 unsigned Code = Stream.ReadCode();
648 if (Code == bitc::END_BLOCK) {
649 if (Stream.ReadBlockEnd())
650 return Error("Error at end of type symbol table block");
654 if (Code == bitc::ENTER_SUBBLOCK) {
655 // No known subblocks, always skip them.
656 Stream.ReadSubBlockID();
657 if (Stream.SkipBlock())
658 return Error("Malformed block record");
662 if (Code == bitc::DEFINE_ABBREV) {
663 Stream.ReadAbbrevRecord();
669 switch (Stream.ReadRecord(Code, Record)) {
670 default: // Default behavior: unknown type.
672 case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namechar x N]
673 if (ConvertToString(Record, 1, TypeName))
674 return Error("Invalid TST_ENTRY record");
675 unsigned TypeID = Record[0];
676 if (TypeID >= TypeList.size())
677 return Error("Invalid Type ID in TST_ENTRY record");
679 TheModule->addTypeName(TypeName, TypeList[TypeID].get());
686 bool BitcodeReader::ParseValueSymbolTable() {
687 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
688 return Error("Malformed block record");
690 SmallVector<uint64_t, 64> Record;
692 // Read all the records for this value table.
693 SmallString<128> ValueName;
695 unsigned Code = Stream.ReadCode();
696 if (Code == bitc::END_BLOCK) {
697 if (Stream.ReadBlockEnd())
698 return Error("Error at end of value symbol table block");
701 if (Code == bitc::ENTER_SUBBLOCK) {
702 // No known subblocks, always skip them.
703 Stream.ReadSubBlockID();
704 if (Stream.SkipBlock())
705 return Error("Malformed block record");
709 if (Code == bitc::DEFINE_ABBREV) {
710 Stream.ReadAbbrevRecord();
716 switch (Stream.ReadRecord(Code, Record)) {
717 default: // Default behavior: unknown type.
719 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
720 if (ConvertToString(Record, 1, ValueName))
721 return Error("Invalid VST_ENTRY record");
722 unsigned ValueID = Record[0];
723 if (ValueID >= ValueList.size())
724 return Error("Invalid Value ID in VST_ENTRY record");
725 Value *V = ValueList[ValueID];
727 V->setName(StringRef(ValueName.data(), ValueName.size()));
731 case bitc::VST_CODE_BBENTRY: {
732 if (ConvertToString(Record, 1, ValueName))
733 return Error("Invalid VST_BBENTRY record");
734 BasicBlock *BB = getBasicBlock(Record[0]);
736 return Error("Invalid BB ID in VST_BBENTRY record");
738 BB->setName(StringRef(ValueName.data(), ValueName.size()));
746 bool BitcodeReader::ParseMetadata() {
747 unsigned NextMDValueNo = MDValueList.size();
749 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
750 return Error("Malformed block record");
752 SmallVector<uint64_t, 64> Record;
754 // Read all the records.
756 unsigned Code = Stream.ReadCode();
757 if (Code == bitc::END_BLOCK) {
758 if (Stream.ReadBlockEnd())
759 return Error("Error at end of PARAMATTR block");
763 if (Code == bitc::ENTER_SUBBLOCK) {
764 // No known subblocks, always skip them.
765 Stream.ReadSubBlockID();
766 if (Stream.SkipBlock())
767 return Error("Malformed block record");
771 if (Code == bitc::DEFINE_ABBREV) {
772 Stream.ReadAbbrevRecord();
776 bool IsFunctionLocal = false;
779 Code = Stream.ReadRecord(Code, Record);
781 default: // Default behavior: ignore.
783 case bitc::METADATA_NAME: {
784 // Read named of the named metadata.
785 unsigned NameLength = Record.size();
787 Name.resize(NameLength);
788 for (unsigned i = 0; i != NameLength; ++i)
791 Code = Stream.ReadCode();
793 // METADATA_NAME is always followed by METADATA_NAMED_NODE2.
794 // Or METADATA_NAMED_NODE in LLVM 2.7. FIXME: Remove this in LLVM 3.0.
795 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
796 if (NextBitCode == bitc::METADATA_NAMED_NODE) {
797 LLVM2_7MetadataDetected = true;
798 } else if (NextBitCode != bitc::METADATA_NAMED_NODE2)
799 assert ( 0 && "Invalid Named Metadata record");
801 // Read named metadata elements.
802 unsigned Size = Record.size();
803 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
804 for (unsigned i = 0; i != Size; ++i) {
805 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
807 return Error("Malformed metadata record");
810 // Backwards compatibility hack: NamedMDValues used to be Values,
811 // and they got their own slots in the value numbering. They are no
812 // longer Values, however we still need to account for them in the
813 // numbering in order to be able to read old bitcode files.
814 // FIXME: Remove this in LLVM 3.0.
815 if (LLVM2_7MetadataDetected)
816 MDValueList.AssignValue(0, NextMDValueNo++);
819 case bitc::METADATA_FN_NODE: // FIXME: Remove in LLVM 3.0.
820 case bitc::METADATA_FN_NODE2:
821 IsFunctionLocal = true;
823 case bitc::METADATA_NODE: // FIXME: Remove in LLVM 3.0.
824 case bitc::METADATA_NODE2: {
826 // Detect 2.7-era metadata.
827 // FIXME: Remove in LLVM 3.0.
828 if (Code == bitc::METADATA_FN_NODE || Code == bitc::METADATA_NODE)
829 LLVM2_7MetadataDetected = true;
831 if (Record.size() % 2 == 1)
832 return Error("Invalid METADATA_NODE2 record");
834 unsigned Size = Record.size();
835 SmallVector<Value*, 8> Elts;
836 for (unsigned i = 0; i != Size; i += 2) {
837 const Type *Ty = getTypeByID(Record[i]);
838 if (!Ty) return Error("Invalid METADATA_NODE2 record");
839 if (Ty->isMetadataTy())
840 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
841 else if (!Ty->isVoidTy())
842 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
844 Elts.push_back(NULL);
846 Value *V = MDNode::getWhenValsUnresolved(Context,
847 Elts.data(), Elts.size(),
849 IsFunctionLocal = false;
850 MDValueList.AssignValue(V, NextMDValueNo++);
853 case bitc::METADATA_STRING: {
854 unsigned MDStringLength = Record.size();
855 SmallString<8> String;
856 String.resize(MDStringLength);
857 for (unsigned i = 0; i != MDStringLength; ++i)
858 String[i] = Record[i];
859 Value *V = MDString::get(Context,
860 StringRef(String.data(), String.size()));
861 MDValueList.AssignValue(V, NextMDValueNo++);
864 case bitc::METADATA_KIND: {
865 unsigned RecordLength = Record.size();
866 if (Record.empty() || RecordLength < 2)
867 return Error("Invalid METADATA_KIND record");
869 Name.resize(RecordLength-1);
870 unsigned Kind = Record[0];
871 for (unsigned i = 1; i != RecordLength; ++i)
872 Name[i-1] = Record[i];
874 unsigned NewKind = TheModule->getMDKindID(Name.str());
875 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
876 return Error("Conflicting METADATA_KIND records");
883 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
884 /// the LSB for dense VBR encoding.
885 static uint64_t DecodeSignRotatedValue(uint64_t V) {
890 // There is no such thing as -0 with integers. "-0" really means MININT.
894 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
895 /// values and aliases that we can.
896 bool BitcodeReader::ResolveGlobalAndAliasInits() {
897 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
898 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
900 GlobalInitWorklist.swap(GlobalInits);
901 AliasInitWorklist.swap(AliasInits);
903 while (!GlobalInitWorklist.empty()) {
904 unsigned ValID = GlobalInitWorklist.back().second;
905 if (ValID >= ValueList.size()) {
906 // Not ready to resolve this yet, it requires something later in the file.
907 GlobalInits.push_back(GlobalInitWorklist.back());
909 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
910 GlobalInitWorklist.back().first->setInitializer(C);
912 return Error("Global variable initializer is not a constant!");
914 GlobalInitWorklist.pop_back();
917 while (!AliasInitWorklist.empty()) {
918 unsigned ValID = AliasInitWorklist.back().second;
919 if (ValID >= ValueList.size()) {
920 AliasInits.push_back(AliasInitWorklist.back());
922 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
923 AliasInitWorklist.back().first->setAliasee(C);
925 return Error("Alias initializer is not a constant!");
927 AliasInitWorklist.pop_back();
932 bool BitcodeReader::ParseConstants() {
933 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
934 return Error("Malformed block record");
936 SmallVector<uint64_t, 64> Record;
938 // Read all the records for this value table.
939 const Type *CurTy = Type::getInt32Ty(Context);
940 unsigned NextCstNo = ValueList.size();
942 unsigned Code = Stream.ReadCode();
943 if (Code == bitc::END_BLOCK)
946 if (Code == bitc::ENTER_SUBBLOCK) {
947 // No known subblocks, always skip them.
948 Stream.ReadSubBlockID();
949 if (Stream.SkipBlock())
950 return Error("Malformed block record");
954 if (Code == bitc::DEFINE_ABBREV) {
955 Stream.ReadAbbrevRecord();
962 unsigned BitCode = Stream.ReadRecord(Code, Record);
964 default: // Default behavior: unknown constant
965 case bitc::CST_CODE_UNDEF: // UNDEF
966 V = UndefValue::get(CurTy);
968 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
970 return Error("Malformed CST_SETTYPE record");
971 if (Record[0] >= TypeList.size())
972 return Error("Invalid Type ID in CST_SETTYPE record");
973 CurTy = TypeList[Record[0]];
974 continue; // Skip the ValueList manipulation.
975 case bitc::CST_CODE_NULL: // NULL
976 V = Constant::getNullValue(CurTy);
978 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
979 if (!CurTy->isIntegerTy() || Record.empty())
980 return Error("Invalid CST_INTEGER record");
981 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
983 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
984 if (!CurTy->isIntegerTy() || Record.empty())
985 return Error("Invalid WIDE_INTEGER record");
987 unsigned NumWords = Record.size();
988 SmallVector<uint64_t, 8> Words;
989 Words.resize(NumWords);
990 for (unsigned i = 0; i != NumWords; ++i)
991 Words[i] = DecodeSignRotatedValue(Record[i]);
992 V = ConstantInt::get(Context,
993 APInt(cast<IntegerType>(CurTy)->getBitWidth(),
994 NumWords, &Words[0]));
997 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
999 return Error("Invalid FLOAT record");
1000 if (CurTy->isFloatTy())
1001 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1002 else if (CurTy->isDoubleTy())
1003 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1004 else if (CurTy->isX86_FP80Ty()) {
1005 // Bits are not stored the same way as a normal i80 APInt, compensate.
1006 uint64_t Rearrange[2];
1007 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1008 Rearrange[1] = Record[0] >> 48;
1009 V = ConstantFP::get(Context, APFloat(APInt(80, 2, Rearrange)));
1010 } else if (CurTy->isFP128Ty())
1011 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0]), true));
1012 else if (CurTy->isPPC_FP128Ty())
1013 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0])));
1015 V = UndefValue::get(CurTy);
1019 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1021 return Error("Invalid CST_AGGREGATE record");
1023 unsigned Size = Record.size();
1024 std::vector<Constant*> Elts;
1026 if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
1027 for (unsigned i = 0; i != Size; ++i)
1028 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1029 STy->getElementType(i)));
1030 V = ConstantStruct::get(STy, Elts);
1031 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1032 const Type *EltTy = ATy->getElementType();
1033 for (unsigned i = 0; i != Size; ++i)
1034 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1035 V = ConstantArray::get(ATy, Elts);
1036 } else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1037 const Type *EltTy = VTy->getElementType();
1038 for (unsigned i = 0; i != Size; ++i)
1039 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1040 V = ConstantVector::get(Elts);
1042 V = UndefValue::get(CurTy);
1046 case bitc::CST_CODE_STRING: { // STRING: [values]
1048 return Error("Invalid CST_AGGREGATE record");
1050 const ArrayType *ATy = cast<ArrayType>(CurTy);
1051 const Type *EltTy = ATy->getElementType();
1053 unsigned Size = Record.size();
1054 std::vector<Constant*> Elts;
1055 for (unsigned i = 0; i != Size; ++i)
1056 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1057 V = ConstantArray::get(ATy, Elts);
1060 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1062 return Error("Invalid CST_AGGREGATE record");
1064 const ArrayType *ATy = cast<ArrayType>(CurTy);
1065 const Type *EltTy = ATy->getElementType();
1067 unsigned Size = Record.size();
1068 std::vector<Constant*> Elts;
1069 for (unsigned i = 0; i != Size; ++i)
1070 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1071 Elts.push_back(Constant::getNullValue(EltTy));
1072 V = ConstantArray::get(ATy, Elts);
1075 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1076 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1077 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1079 V = UndefValue::get(CurTy); // Unknown binop.
1081 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1082 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1084 if (Record.size() >= 4) {
1085 if (Opc == Instruction::Add ||
1086 Opc == Instruction::Sub ||
1087 Opc == Instruction::Mul) {
1088 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1089 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1090 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1091 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1092 } else if (Opc == Instruction::SDiv) {
1093 if (Record[3] & (1 << bitc::SDIV_EXACT))
1094 Flags |= SDivOperator::IsExact;
1097 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1101 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1102 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1103 int Opc = GetDecodedCastOpcode(Record[0]);
1105 V = UndefValue::get(CurTy); // Unknown cast.
1107 const Type *OpTy = getTypeByID(Record[1]);
1108 if (!OpTy) return Error("Invalid CE_CAST record");
1109 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1110 V = ConstantExpr::getCast(Opc, Op, CurTy);
1114 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1115 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1116 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1117 SmallVector<Constant*, 16> Elts;
1118 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1119 const Type *ElTy = getTypeByID(Record[i]);
1120 if (!ElTy) return Error("Invalid CE_GEP record");
1121 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1123 if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
1124 V = ConstantExpr::getInBoundsGetElementPtr(Elts[0], &Elts[1],
1127 V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1],
1131 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1132 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1133 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1134 Type::getInt1Ty(Context)),
1135 ValueList.getConstantFwdRef(Record[1],CurTy),
1136 ValueList.getConstantFwdRef(Record[2],CurTy));
1138 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1139 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1140 const VectorType *OpTy =
1141 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1142 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1143 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1144 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1145 V = ConstantExpr::getExtractElement(Op0, Op1);
1148 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1149 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1150 if (Record.size() < 3 || OpTy == 0)
1151 return Error("Invalid CE_INSERTELT record");
1152 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1153 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1154 OpTy->getElementType());
1155 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1156 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1159 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1160 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1161 if (Record.size() < 3 || OpTy == 0)
1162 return Error("Invalid CE_SHUFFLEVEC record");
1163 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1164 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1165 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1166 OpTy->getNumElements());
1167 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1168 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1171 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1172 const VectorType *RTy = dyn_cast<VectorType>(CurTy);
1173 const VectorType *OpTy =
1174 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1175 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1176 return Error("Invalid CE_SHUFVEC_EX record");
1177 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1178 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1179 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1180 RTy->getNumElements());
1181 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1182 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1185 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1186 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1187 const Type *OpTy = getTypeByID(Record[0]);
1188 if (OpTy == 0) return Error("Invalid CE_CMP record");
1189 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1190 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1192 if (OpTy->isFPOrFPVectorTy())
1193 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1195 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1198 case bitc::CST_CODE_INLINEASM: {
1199 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1200 std::string AsmStr, ConstrStr;
1201 bool HasSideEffects = Record[0] & 1;
1202 bool IsAlignStack = Record[0] >> 1;
1203 unsigned AsmStrSize = Record[1];
1204 if (2+AsmStrSize >= Record.size())
1205 return Error("Invalid INLINEASM record");
1206 unsigned ConstStrSize = Record[2+AsmStrSize];
1207 if (3+AsmStrSize+ConstStrSize > Record.size())
1208 return Error("Invalid INLINEASM record");
1210 for (unsigned i = 0; i != AsmStrSize; ++i)
1211 AsmStr += (char)Record[2+i];
1212 for (unsigned i = 0; i != ConstStrSize; ++i)
1213 ConstrStr += (char)Record[3+AsmStrSize+i];
1214 const PointerType *PTy = cast<PointerType>(CurTy);
1215 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1216 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1219 case bitc::CST_CODE_BLOCKADDRESS:{
1220 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1221 const Type *FnTy = getTypeByID(Record[0]);
1222 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1224 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1225 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1227 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1228 Type::getInt8Ty(Context),
1229 false, GlobalValue::InternalLinkage,
1231 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1237 ValueList.AssignValue(V, NextCstNo);
1241 if (NextCstNo != ValueList.size())
1242 return Error("Invalid constant reference!");
1244 if (Stream.ReadBlockEnd())
1245 return Error("Error at end of constants block");
1247 // Once all the constants have been read, go through and resolve forward
1249 ValueList.ResolveConstantForwardRefs();
1253 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1254 /// remember where it is and then skip it. This lets us lazily deserialize the
1256 bool BitcodeReader::RememberAndSkipFunctionBody() {
1257 // Get the function we are talking about.
1258 if (FunctionsWithBodies.empty())
1259 return Error("Insufficient function protos");
1261 Function *Fn = FunctionsWithBodies.back();
1262 FunctionsWithBodies.pop_back();
1264 // Save the current stream state.
1265 uint64_t CurBit = Stream.GetCurrentBitNo();
1266 DeferredFunctionInfo[Fn] = CurBit;
1268 // Skip over the function block for now.
1269 if (Stream.SkipBlock())
1270 return Error("Malformed block record");
1274 bool BitcodeReader::ParseModule() {
1275 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1276 return Error("Malformed block record");
1278 SmallVector<uint64_t, 64> Record;
1279 std::vector<std::string> SectionTable;
1280 std::vector<std::string> GCTable;
1282 // Read all the records for this module.
1283 while (!Stream.AtEndOfStream()) {
1284 unsigned Code = Stream.ReadCode();
1285 if (Code == bitc::END_BLOCK) {
1286 if (Stream.ReadBlockEnd())
1287 return Error("Error at end of module block");
1289 // Patch the initializers for globals and aliases up.
1290 ResolveGlobalAndAliasInits();
1291 if (!GlobalInits.empty() || !AliasInits.empty())
1292 return Error("Malformed global initializer set");
1293 if (!FunctionsWithBodies.empty())
1294 return Error("Too few function bodies found");
1296 // Look for intrinsic functions which need to be upgraded at some point
1297 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1300 if (UpgradeIntrinsicFunction(FI, NewFn))
1301 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1304 // Look for global variables which need to be renamed.
1305 for (Module::global_iterator
1306 GI = TheModule->global_begin(), GE = TheModule->global_end();
1308 UpgradeGlobalVariable(GI);
1310 // Force deallocation of memory for these vectors to favor the client that
1311 // want lazy deserialization.
1312 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1313 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1314 std::vector<Function*>().swap(FunctionsWithBodies);
1318 if (Code == bitc::ENTER_SUBBLOCK) {
1319 switch (Stream.ReadSubBlockID()) {
1320 default: // Skip unknown content.
1321 if (Stream.SkipBlock())
1322 return Error("Malformed block record");
1324 case bitc::BLOCKINFO_BLOCK_ID:
1325 if (Stream.ReadBlockInfoBlock())
1326 return Error("Malformed BlockInfoBlock");
1328 case bitc::PARAMATTR_BLOCK_ID:
1329 if (ParseAttributeBlock())
1332 case bitc::TYPE_BLOCK_ID:
1333 if (ParseTypeTable())
1336 case bitc::TYPE_SYMTAB_BLOCK_ID:
1337 if (ParseTypeSymbolTable())
1340 case bitc::VALUE_SYMTAB_BLOCK_ID:
1341 if (ParseValueSymbolTable())
1344 case bitc::CONSTANTS_BLOCK_ID:
1345 if (ParseConstants() || ResolveGlobalAndAliasInits())
1348 case bitc::METADATA_BLOCK_ID:
1349 if (ParseMetadata())
1352 case bitc::FUNCTION_BLOCK_ID:
1353 // If this is the first function body we've seen, reverse the
1354 // FunctionsWithBodies list.
1355 if (!HasReversedFunctionsWithBodies) {
1356 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1357 HasReversedFunctionsWithBodies = true;
1360 if (RememberAndSkipFunctionBody())
1367 if (Code == bitc::DEFINE_ABBREV) {
1368 Stream.ReadAbbrevRecord();
1373 switch (Stream.ReadRecord(Code, Record)) {
1374 default: break; // Default behavior, ignore unknown content.
1375 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1376 if (Record.size() < 1)
1377 return Error("Malformed MODULE_CODE_VERSION");
1378 // Only version #0 is supported so far.
1380 return Error("Unknown bitstream version!");
1382 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1384 if (ConvertToString(Record, 0, S))
1385 return Error("Invalid MODULE_CODE_TRIPLE record");
1386 TheModule->setTargetTriple(S);
1389 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1391 if (ConvertToString(Record, 0, S))
1392 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1393 TheModule->setDataLayout(S);
1396 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1398 if (ConvertToString(Record, 0, S))
1399 return Error("Invalid MODULE_CODE_ASM record");
1400 TheModule->setModuleInlineAsm(S);
1403 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1405 if (ConvertToString(Record, 0, S))
1406 return Error("Invalid MODULE_CODE_DEPLIB record");
1407 TheModule->addLibrary(S);
1410 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1412 if (ConvertToString(Record, 0, S))
1413 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1414 SectionTable.push_back(S);
1417 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1419 if (ConvertToString(Record, 0, S))
1420 return Error("Invalid MODULE_CODE_GCNAME record");
1421 GCTable.push_back(S);
1424 // GLOBALVAR: [pointer type, isconst, initid,
1425 // linkage, alignment, section, visibility, threadlocal,
1427 case bitc::MODULE_CODE_GLOBALVAR: {
1428 if (Record.size() < 6)
1429 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1430 const Type *Ty = getTypeByID(Record[0]);
1431 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1432 if (!Ty->isPointerTy())
1433 return Error("Global not a pointer type!");
1434 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1435 Ty = cast<PointerType>(Ty)->getElementType();
1437 bool isConstant = Record[1];
1438 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1439 unsigned Alignment = (1 << Record[4]) >> 1;
1440 std::string Section;
1442 if (Record[5]-1 >= SectionTable.size())
1443 return Error("Invalid section ID");
1444 Section = SectionTable[Record[5]-1];
1446 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1447 if (Record.size() > 6)
1448 Visibility = GetDecodedVisibility(Record[6]);
1449 bool isThreadLocal = false;
1450 if (Record.size() > 7)
1451 isThreadLocal = Record[7];
1453 bool UnnamedAddr = false;
1454 if (Record.size() > 8)
1455 UnnamedAddr = Record[8];
1457 GlobalVariable *NewGV =
1458 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1459 isThreadLocal, AddressSpace);
1460 NewGV->setAlignment(Alignment);
1461 if (!Section.empty())
1462 NewGV->setSection(Section);
1463 NewGV->setVisibility(Visibility);
1464 NewGV->setThreadLocal(isThreadLocal);
1465 NewGV->setUnnamedAddr(UnnamedAddr);
1467 ValueList.push_back(NewGV);
1469 // Remember which value to use for the global initializer.
1470 if (unsigned InitID = Record[2])
1471 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1474 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1475 // alignment, section, visibility, gc, unnamed_addr]
1476 case bitc::MODULE_CODE_FUNCTION: {
1477 if (Record.size() < 8)
1478 return Error("Invalid MODULE_CODE_FUNCTION record");
1479 const Type *Ty = getTypeByID(Record[0]);
1480 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1481 if (!Ty->isPointerTy())
1482 return Error("Function not a pointer type!");
1483 const FunctionType *FTy =
1484 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1486 return Error("Function not a pointer to function type!");
1488 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1491 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1492 bool isProto = Record[2];
1493 Func->setLinkage(GetDecodedLinkage(Record[3]));
1494 Func->setAttributes(getAttributes(Record[4]));
1496 Func->setAlignment((1 << Record[5]) >> 1);
1498 if (Record[6]-1 >= SectionTable.size())
1499 return Error("Invalid section ID");
1500 Func->setSection(SectionTable[Record[6]-1]);
1502 Func->setVisibility(GetDecodedVisibility(Record[7]));
1503 if (Record.size() > 8 && Record[8]) {
1504 if (Record[8]-1 > GCTable.size())
1505 return Error("Invalid GC ID");
1506 Func->setGC(GCTable[Record[8]-1].c_str());
1508 bool UnnamedAddr = false;
1509 if (Record.size() > 9)
1510 UnnamedAddr = Record[9];
1511 Func->setUnnamedAddr(UnnamedAddr);
1512 ValueList.push_back(Func);
1514 // If this is a function with a body, remember the prototype we are
1515 // creating now, so that we can match up the body with them later.
1517 FunctionsWithBodies.push_back(Func);
1520 // ALIAS: [alias type, aliasee val#, linkage]
1521 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1522 case bitc::MODULE_CODE_ALIAS: {
1523 if (Record.size() < 3)
1524 return Error("Invalid MODULE_ALIAS record");
1525 const Type *Ty = getTypeByID(Record[0]);
1526 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1527 if (!Ty->isPointerTy())
1528 return Error("Function not a pointer type!");
1530 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1532 // Old bitcode files didn't have visibility field.
1533 if (Record.size() > 3)
1534 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1535 ValueList.push_back(NewGA);
1536 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1539 /// MODULE_CODE_PURGEVALS: [numvals]
1540 case bitc::MODULE_CODE_PURGEVALS:
1541 // Trim down the value list to the specified size.
1542 if (Record.size() < 1 || Record[0] > ValueList.size())
1543 return Error("Invalid MODULE_PURGEVALS record");
1544 ValueList.shrinkTo(Record[0]);
1550 return Error("Premature end of bitstream");
1553 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1556 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1557 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1559 if (Buffer->getBufferSize() & 3) {
1560 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
1561 return Error("Invalid bitcode signature");
1563 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1566 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1567 // The magic number is 0x0B17C0DE stored in little endian.
1568 if (isBitcodeWrapper(BufPtr, BufEnd))
1569 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1570 return Error("Invalid bitcode wrapper header");
1572 StreamFile.init(BufPtr, BufEnd);
1573 Stream.init(StreamFile);
1575 // Sniff for the signature.
1576 if (Stream.Read(8) != 'B' ||
1577 Stream.Read(8) != 'C' ||
1578 Stream.Read(4) != 0x0 ||
1579 Stream.Read(4) != 0xC ||
1580 Stream.Read(4) != 0xE ||
1581 Stream.Read(4) != 0xD)
1582 return Error("Invalid bitcode signature");
1584 // We expect a number of well-defined blocks, though we don't necessarily
1585 // need to understand them all.
1586 while (!Stream.AtEndOfStream()) {
1587 unsigned Code = Stream.ReadCode();
1589 if (Code != bitc::ENTER_SUBBLOCK)
1590 return Error("Invalid record at top-level");
1592 unsigned BlockID = Stream.ReadSubBlockID();
1594 // We only know the MODULE subblock ID.
1596 case bitc::BLOCKINFO_BLOCK_ID:
1597 if (Stream.ReadBlockInfoBlock())
1598 return Error("Malformed BlockInfoBlock");
1600 case bitc::MODULE_BLOCK_ID:
1601 // Reject multiple MODULE_BLOCK's in a single bitstream.
1603 return Error("Multiple MODULE_BLOCKs in same stream");
1609 if (Stream.SkipBlock())
1610 return Error("Malformed block record");
1618 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1619 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1620 return Error("Malformed block record");
1622 SmallVector<uint64_t, 64> Record;
1624 // Read all the records for this module.
1625 while (!Stream.AtEndOfStream()) {
1626 unsigned Code = Stream.ReadCode();
1627 if (Code == bitc::END_BLOCK) {
1628 if (Stream.ReadBlockEnd())
1629 return Error("Error at end of module block");
1634 if (Code == bitc::ENTER_SUBBLOCK) {
1635 switch (Stream.ReadSubBlockID()) {
1636 default: // Skip unknown content.
1637 if (Stream.SkipBlock())
1638 return Error("Malformed block record");
1644 if (Code == bitc::DEFINE_ABBREV) {
1645 Stream.ReadAbbrevRecord();
1650 switch (Stream.ReadRecord(Code, Record)) {
1651 default: break; // Default behavior, ignore unknown content.
1652 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1653 if (Record.size() < 1)
1654 return Error("Malformed MODULE_CODE_VERSION");
1655 // Only version #0 is supported so far.
1657 return Error("Unknown bitstream version!");
1659 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1661 if (ConvertToString(Record, 0, S))
1662 return Error("Invalid MODULE_CODE_TRIPLE record");
1670 return Error("Premature end of bitstream");
1673 bool BitcodeReader::ParseTriple(std::string &Triple) {
1674 if (Buffer->getBufferSize() & 3)
1675 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1677 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1678 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1680 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1681 // The magic number is 0x0B17C0DE stored in little endian.
1682 if (isBitcodeWrapper(BufPtr, BufEnd))
1683 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1684 return Error("Invalid bitcode wrapper header");
1686 StreamFile.init(BufPtr, BufEnd);
1687 Stream.init(StreamFile);
1689 // Sniff for the signature.
1690 if (Stream.Read(8) != 'B' ||
1691 Stream.Read(8) != 'C' ||
1692 Stream.Read(4) != 0x0 ||
1693 Stream.Read(4) != 0xC ||
1694 Stream.Read(4) != 0xE ||
1695 Stream.Read(4) != 0xD)
1696 return Error("Invalid bitcode signature");
1698 // We expect a number of well-defined blocks, though we don't necessarily
1699 // need to understand them all.
1700 while (!Stream.AtEndOfStream()) {
1701 unsigned Code = Stream.ReadCode();
1703 if (Code != bitc::ENTER_SUBBLOCK)
1704 return Error("Invalid record at top-level");
1706 unsigned BlockID = Stream.ReadSubBlockID();
1708 // We only know the MODULE subblock ID.
1710 case bitc::MODULE_BLOCK_ID:
1711 if (ParseModuleTriple(Triple))
1715 if (Stream.SkipBlock())
1716 return Error("Malformed block record");
1724 /// ParseMetadataAttachment - Parse metadata attachments.
1725 bool BitcodeReader::ParseMetadataAttachment() {
1726 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1727 return Error("Malformed block record");
1729 SmallVector<uint64_t, 64> Record;
1731 unsigned Code = Stream.ReadCode();
1732 if (Code == bitc::END_BLOCK) {
1733 if (Stream.ReadBlockEnd())
1734 return Error("Error at end of PARAMATTR block");
1737 if (Code == bitc::DEFINE_ABBREV) {
1738 Stream.ReadAbbrevRecord();
1741 // Read a metadata attachment record.
1743 switch (Stream.ReadRecord(Code, Record)) {
1744 default: // Default behavior: ignore.
1746 // FIXME: Remove in LLVM 3.0.
1747 case bitc::METADATA_ATTACHMENT:
1748 LLVM2_7MetadataDetected = true;
1749 case bitc::METADATA_ATTACHMENT2: {
1750 unsigned RecordLength = Record.size();
1751 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1752 return Error ("Invalid METADATA_ATTACHMENT reader!");
1753 Instruction *Inst = InstructionList[Record[0]];
1754 for (unsigned i = 1; i != RecordLength; i = i+2) {
1755 unsigned Kind = Record[i];
1756 DenseMap<unsigned, unsigned>::iterator I =
1757 MDKindMap.find(Kind);
1758 if (I == MDKindMap.end())
1759 return Error("Invalid metadata kind ID");
1760 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1761 Inst->setMetadata(I->second, cast<MDNode>(Node));
1770 /// ParseFunctionBody - Lazily parse the specified function body block.
1771 bool BitcodeReader::ParseFunctionBody(Function *F) {
1772 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1773 return Error("Malformed block record");
1775 InstructionList.clear();
1776 unsigned ModuleValueListSize = ValueList.size();
1777 unsigned ModuleMDValueListSize = MDValueList.size();
1779 // Add all the function arguments to the value table.
1780 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1781 ValueList.push_back(I);
1783 unsigned NextValueNo = ValueList.size();
1784 BasicBlock *CurBB = 0;
1785 unsigned CurBBNo = 0;
1789 // Read all the records.
1790 SmallVector<uint64_t, 64> Record;
1792 unsigned Code = Stream.ReadCode();
1793 if (Code == bitc::END_BLOCK) {
1794 if (Stream.ReadBlockEnd())
1795 return Error("Error at end of function block");
1799 if (Code == bitc::ENTER_SUBBLOCK) {
1800 switch (Stream.ReadSubBlockID()) {
1801 default: // Skip unknown content.
1802 if (Stream.SkipBlock())
1803 return Error("Malformed block record");
1805 case bitc::CONSTANTS_BLOCK_ID:
1806 if (ParseConstants()) return true;
1807 NextValueNo = ValueList.size();
1809 case bitc::VALUE_SYMTAB_BLOCK_ID:
1810 if (ParseValueSymbolTable()) return true;
1812 case bitc::METADATA_ATTACHMENT_ID:
1813 if (ParseMetadataAttachment()) return true;
1815 case bitc::METADATA_BLOCK_ID:
1816 if (ParseMetadata()) return true;
1822 if (Code == bitc::DEFINE_ABBREV) {
1823 Stream.ReadAbbrevRecord();
1830 unsigned BitCode = Stream.ReadRecord(Code, Record);
1832 default: // Default behavior: reject
1833 return Error("Unknown instruction");
1834 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1835 if (Record.size() < 1 || Record[0] == 0)
1836 return Error("Invalid DECLAREBLOCKS record");
1837 // Create all the basic blocks for the function.
1838 FunctionBBs.resize(Record[0]);
1839 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1840 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1841 CurBB = FunctionBBs[0];
1845 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1846 // This record indicates that the last instruction is at the same
1847 // location as the previous instruction with a location.
1850 // Get the last instruction emitted.
1851 if (CurBB && !CurBB->empty())
1853 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1854 !FunctionBBs[CurBBNo-1]->empty())
1855 I = &FunctionBBs[CurBBNo-1]->back();
1857 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1858 I->setDebugLoc(LastLoc);
1862 // FIXME: Remove this in LLVM 3.0.
1863 case bitc::FUNC_CODE_DEBUG_LOC:
1864 LLVM2_7MetadataDetected = true;
1865 case bitc::FUNC_CODE_DEBUG_LOC2: { // DEBUG_LOC: [line, col, scope, ia]
1866 I = 0; // Get the last instruction emitted.
1867 if (CurBB && !CurBB->empty())
1869 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1870 !FunctionBBs[CurBBNo-1]->empty())
1871 I = &FunctionBBs[CurBBNo-1]->back();
1872 if (I == 0 || Record.size() < 4)
1873 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
1875 unsigned Line = Record[0], Col = Record[1];
1876 unsigned ScopeID = Record[2], IAID = Record[3];
1878 MDNode *Scope = 0, *IA = 0;
1879 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
1880 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
1881 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
1882 I->setDebugLoc(LastLoc);
1887 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1890 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1891 getValue(Record, OpNum, LHS->getType(), RHS) ||
1892 OpNum+1 > Record.size())
1893 return Error("Invalid BINOP record");
1895 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
1896 if (Opc == -1) return Error("Invalid BINOP record");
1897 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
1898 InstructionList.push_back(I);
1899 if (OpNum < Record.size()) {
1900 if (Opc == Instruction::Add ||
1901 Opc == Instruction::Sub ||
1902 Opc == Instruction::Mul) {
1903 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1904 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
1905 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1906 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
1907 } else if (Opc == Instruction::SDiv) {
1908 if (Record[OpNum] & (1 << bitc::SDIV_EXACT))
1909 cast<BinaryOperator>(I)->setIsExact(true);
1914 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
1917 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1918 OpNum+2 != Record.size())
1919 return Error("Invalid CAST record");
1921 const Type *ResTy = getTypeByID(Record[OpNum]);
1922 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
1923 if (Opc == -1 || ResTy == 0)
1924 return Error("Invalid CAST record");
1925 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
1926 InstructionList.push_back(I);
1929 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
1930 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
1933 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
1934 return Error("Invalid GEP record");
1936 SmallVector<Value*, 16> GEPIdx;
1937 while (OpNum != Record.size()) {
1939 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1940 return Error("Invalid GEP record");
1941 GEPIdx.push_back(Op);
1944 I = GetElementPtrInst::Create(BasePtr, GEPIdx.begin(), GEPIdx.end());
1945 InstructionList.push_back(I);
1946 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
1947 cast<GetElementPtrInst>(I)->setIsInBounds(true);
1951 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
1952 // EXTRACTVAL: [opty, opval, n x indices]
1955 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1956 return Error("Invalid EXTRACTVAL record");
1958 SmallVector<unsigned, 4> EXTRACTVALIdx;
1959 for (unsigned RecSize = Record.size();
1960 OpNum != RecSize; ++OpNum) {
1961 uint64_t Index = Record[OpNum];
1962 if ((unsigned)Index != Index)
1963 return Error("Invalid EXTRACTVAL index");
1964 EXTRACTVALIdx.push_back((unsigned)Index);
1967 I = ExtractValueInst::Create(Agg,
1968 EXTRACTVALIdx.begin(), EXTRACTVALIdx.end());
1969 InstructionList.push_back(I);
1973 case bitc::FUNC_CODE_INST_INSERTVAL: {
1974 // INSERTVAL: [opty, opval, opty, opval, n x indices]
1977 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1978 return Error("Invalid INSERTVAL record");
1980 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
1981 return Error("Invalid INSERTVAL record");
1983 SmallVector<unsigned, 4> INSERTVALIdx;
1984 for (unsigned RecSize = Record.size();
1985 OpNum != RecSize; ++OpNum) {
1986 uint64_t Index = Record[OpNum];
1987 if ((unsigned)Index != Index)
1988 return Error("Invalid INSERTVAL index");
1989 INSERTVALIdx.push_back((unsigned)Index);
1992 I = InsertValueInst::Create(Agg, Val,
1993 INSERTVALIdx.begin(), INSERTVALIdx.end());
1994 InstructionList.push_back(I);
1998 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
1999 // obsolete form of select
2000 // handles select i1 ... in old bitcode
2002 Value *TrueVal, *FalseVal, *Cond;
2003 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2004 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2005 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
2006 return Error("Invalid SELECT record");
2008 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2009 InstructionList.push_back(I);
2013 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2014 // new form of select
2015 // handles select i1 or select [N x i1]
2017 Value *TrueVal, *FalseVal, *Cond;
2018 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2019 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2020 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2021 return Error("Invalid SELECT record");
2023 // select condition can be either i1 or [N x i1]
2024 if (const VectorType* vector_type =
2025 dyn_cast<const VectorType>(Cond->getType())) {
2027 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2028 return Error("Invalid SELECT condition type");
2031 if (Cond->getType() != Type::getInt1Ty(Context))
2032 return Error("Invalid SELECT condition type");
2035 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2036 InstructionList.push_back(I);
2040 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2043 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2044 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2045 return Error("Invalid EXTRACTELT record");
2046 I = ExtractElementInst::Create(Vec, Idx);
2047 InstructionList.push_back(I);
2051 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2053 Value *Vec, *Elt, *Idx;
2054 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2055 getValue(Record, OpNum,
2056 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2057 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2058 return Error("Invalid INSERTELT record");
2059 I = InsertElementInst::Create(Vec, Elt, Idx);
2060 InstructionList.push_back(I);
2064 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2066 Value *Vec1, *Vec2, *Mask;
2067 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2068 getValue(Record, OpNum, Vec1->getType(), Vec2))
2069 return Error("Invalid SHUFFLEVEC record");
2071 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2072 return Error("Invalid SHUFFLEVEC record");
2073 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2074 InstructionList.push_back(I);
2078 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2079 // Old form of ICmp/FCmp returning bool
2080 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2081 // both legal on vectors but had different behaviour.
2082 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2083 // FCmp/ICmp returning bool or vector of bool
2087 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2088 getValue(Record, OpNum, LHS->getType(), RHS) ||
2089 OpNum+1 != Record.size())
2090 return Error("Invalid CMP record");
2092 if (LHS->getType()->isFPOrFPVectorTy())
2093 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2095 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2096 InstructionList.push_back(I);
2100 case bitc::FUNC_CODE_INST_GETRESULT: { // GETRESULT: [ty, val, n]
2101 if (Record.size() != 2)
2102 return Error("Invalid GETRESULT record");
2105 getValueTypePair(Record, OpNum, NextValueNo, Op);
2106 unsigned Index = Record[1];
2107 I = ExtractValueInst::Create(Op, Index);
2108 InstructionList.push_back(I);
2112 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2114 unsigned Size = Record.size();
2116 I = ReturnInst::Create(Context);
2117 InstructionList.push_back(I);
2122 SmallVector<Value *,4> Vs;
2125 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2126 return Error("Invalid RET record");
2128 } while(OpNum != Record.size());
2130 const Type *ReturnType = F->getReturnType();
2131 // Handle multiple return values. FIXME: Remove in LLVM 3.0.
2132 if (Vs.size() > 1 ||
2133 (ReturnType->isStructTy() &&
2134 (Vs.empty() || Vs[0]->getType() != ReturnType))) {
2135 Value *RV = UndefValue::get(ReturnType);
2136 for (unsigned i = 0, e = Vs.size(); i != e; ++i) {
2137 I = InsertValueInst::Create(RV, Vs[i], i, "mrv");
2138 InstructionList.push_back(I);
2139 CurBB->getInstList().push_back(I);
2140 ValueList.AssignValue(I, NextValueNo++);
2143 I = ReturnInst::Create(Context, RV);
2144 InstructionList.push_back(I);
2148 I = ReturnInst::Create(Context, Vs[0]);
2149 InstructionList.push_back(I);
2152 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2153 if (Record.size() != 1 && Record.size() != 3)
2154 return Error("Invalid BR record");
2155 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2157 return Error("Invalid BR record");
2159 if (Record.size() == 1) {
2160 I = BranchInst::Create(TrueDest);
2161 InstructionList.push_back(I);
2164 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2165 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
2166 if (FalseDest == 0 || Cond == 0)
2167 return Error("Invalid BR record");
2168 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2169 InstructionList.push_back(I);
2173 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2174 if (Record.size() < 3 || (Record.size() & 1) == 0)
2175 return Error("Invalid SWITCH record");
2176 const Type *OpTy = getTypeByID(Record[0]);
2177 Value *Cond = getFnValueByID(Record[1], OpTy);
2178 BasicBlock *Default = getBasicBlock(Record[2]);
2179 if (OpTy == 0 || Cond == 0 || Default == 0)
2180 return Error("Invalid SWITCH record");
2181 unsigned NumCases = (Record.size()-3)/2;
2182 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2183 InstructionList.push_back(SI);
2184 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2185 ConstantInt *CaseVal =
2186 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2187 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2188 if (CaseVal == 0 || DestBB == 0) {
2190 return Error("Invalid SWITCH record!");
2192 SI->addCase(CaseVal, DestBB);
2197 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2198 if (Record.size() < 2)
2199 return Error("Invalid INDIRECTBR record");
2200 const Type *OpTy = getTypeByID(Record[0]);
2201 Value *Address = getFnValueByID(Record[1], OpTy);
2202 if (OpTy == 0 || Address == 0)
2203 return Error("Invalid INDIRECTBR record");
2204 unsigned NumDests = Record.size()-2;
2205 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2206 InstructionList.push_back(IBI);
2207 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2208 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2209 IBI->addDestination(DestBB);
2212 return Error("Invalid INDIRECTBR record!");
2219 case bitc::FUNC_CODE_INST_INVOKE: {
2220 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2221 if (Record.size() < 4) return Error("Invalid INVOKE record");
2222 AttrListPtr PAL = getAttributes(Record[0]);
2223 unsigned CCInfo = Record[1];
2224 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2225 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2229 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2230 return Error("Invalid INVOKE record");
2232 const PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2233 const FunctionType *FTy = !CalleeTy ? 0 :
2234 dyn_cast<FunctionType>(CalleeTy->getElementType());
2236 // Check that the right number of fixed parameters are here.
2237 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2238 Record.size() < OpNum+FTy->getNumParams())
2239 return Error("Invalid INVOKE record");
2241 SmallVector<Value*, 16> Ops;
2242 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2243 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2244 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2247 if (!FTy->isVarArg()) {
2248 if (Record.size() != OpNum)
2249 return Error("Invalid INVOKE record");
2251 // Read type/value pairs for varargs params.
2252 while (OpNum != Record.size()) {
2254 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2255 return Error("Invalid INVOKE record");
2260 I = InvokeInst::Create(Callee, NormalBB, UnwindBB,
2261 Ops.begin(), Ops.end());
2262 InstructionList.push_back(I);
2263 cast<InvokeInst>(I)->setCallingConv(
2264 static_cast<CallingConv::ID>(CCInfo));
2265 cast<InvokeInst>(I)->setAttributes(PAL);
2268 case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
2269 I = new UnwindInst(Context);
2270 InstructionList.push_back(I);
2272 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2273 I = new UnreachableInst(Context);
2274 InstructionList.push_back(I);
2276 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2277 if (Record.size() < 1 || ((Record.size()-1)&1))
2278 return Error("Invalid PHI record");
2279 const Type *Ty = getTypeByID(Record[0]);
2280 if (!Ty) return Error("Invalid PHI record");
2282 PHINode *PN = PHINode::Create(Ty);
2283 InstructionList.push_back(PN);
2284 PN->reserveOperandSpace((Record.size()-1)/2);
2286 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2287 Value *V = getFnValueByID(Record[1+i], Ty);
2288 BasicBlock *BB = getBasicBlock(Record[2+i]);
2289 if (!V || !BB) return Error("Invalid PHI record");
2290 PN->addIncoming(V, BB);
2296 case bitc::FUNC_CODE_INST_MALLOC: { // MALLOC: [instty, op, align]
2297 // Autoupgrade malloc instruction to malloc call.
2298 // FIXME: Remove in LLVM 3.0.
2299 if (Record.size() < 3)
2300 return Error("Invalid MALLOC record");
2301 const PointerType *Ty =
2302 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2303 Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
2304 if (!Ty || !Size) return Error("Invalid MALLOC record");
2305 if (!CurBB) return Error("Invalid malloc instruction with no BB");
2306 const Type *Int32Ty = IntegerType::getInt32Ty(CurBB->getContext());
2307 Constant *AllocSize = ConstantExpr::getSizeOf(Ty->getElementType());
2308 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, Int32Ty);
2309 I = CallInst::CreateMalloc(CurBB, Int32Ty, Ty->getElementType(),
2310 AllocSize, Size, NULL);
2311 InstructionList.push_back(I);
2314 case bitc::FUNC_CODE_INST_FREE: { // FREE: [op, opty]
2317 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2318 OpNum != Record.size())
2319 return Error("Invalid FREE record");
2320 if (!CurBB) return Error("Invalid free instruction with no BB");
2321 I = CallInst::CreateFree(Op, CurBB);
2322 InstructionList.push_back(I);
2325 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2326 // For backward compatibility, tolerate a lack of an opty, and use i32.
2327 // Remove this in LLVM 3.0.
2328 if (Record.size() < 3 || Record.size() > 4)
2329 return Error("Invalid ALLOCA record");
2331 const PointerType *Ty =
2332 dyn_cast_or_null<PointerType>(getTypeByID(Record[OpNum++]));
2333 const Type *OpTy = Record.size() == 4 ? getTypeByID(Record[OpNum++]) :
2334 Type::getInt32Ty(Context);
2335 Value *Size = getFnValueByID(Record[OpNum++], OpTy);
2336 unsigned Align = Record[OpNum++];
2337 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2338 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2339 InstructionList.push_back(I);
2342 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2345 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2346 OpNum+2 != Record.size())
2347 return Error("Invalid LOAD record");
2349 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2350 InstructionList.push_back(I);
2353 case bitc::FUNC_CODE_INST_STORE2: { // STORE2:[ptrty, ptr, val, align, vol]
2356 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2357 getValue(Record, OpNum,
2358 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2359 OpNum+2 != Record.size())
2360 return Error("Invalid STORE record");
2362 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2363 InstructionList.push_back(I);
2366 case bitc::FUNC_CODE_INST_STORE: { // STORE:[val, valty, ptr, align, vol]
2367 // FIXME: Legacy form of store instruction. Should be removed in LLVM 3.0.
2370 if (getValueTypePair(Record, OpNum, NextValueNo, Val) ||
2371 getValue(Record, OpNum,
2372 PointerType::getUnqual(Val->getType()), Ptr)||
2373 OpNum+2 != Record.size())
2374 return Error("Invalid STORE record");
2376 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2377 InstructionList.push_back(I);
2380 // FIXME: Remove this in LLVM 3.0.
2381 case bitc::FUNC_CODE_INST_CALL:
2382 LLVM2_7MetadataDetected = true;
2383 case bitc::FUNC_CODE_INST_CALL2: {
2384 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2385 if (Record.size() < 3)
2386 return Error("Invalid CALL record");
2388 AttrListPtr PAL = getAttributes(Record[0]);
2389 unsigned CCInfo = Record[1];
2393 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2394 return Error("Invalid CALL record");
2396 const PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2397 const FunctionType *FTy = 0;
2398 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2399 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2400 return Error("Invalid CALL record");
2402 SmallVector<Value*, 16> Args;
2403 // Read the fixed params.
2404 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2405 if (FTy->getParamType(i)->getTypeID()==Type::LabelTyID)
2406 Args.push_back(getBasicBlock(Record[OpNum]));
2408 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2409 if (Args.back() == 0) return Error("Invalid CALL record");
2412 // Read type/value pairs for varargs params.
2413 if (!FTy->isVarArg()) {
2414 if (OpNum != Record.size())
2415 return Error("Invalid CALL record");
2417 while (OpNum != Record.size()) {
2419 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2420 return Error("Invalid CALL record");
2425 I = CallInst::Create(Callee, Args.begin(), Args.end());
2426 InstructionList.push_back(I);
2427 cast<CallInst>(I)->setCallingConv(
2428 static_cast<CallingConv::ID>(CCInfo>>1));
2429 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2430 cast<CallInst>(I)->setAttributes(PAL);
2433 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2434 if (Record.size() < 3)
2435 return Error("Invalid VAARG record");
2436 const Type *OpTy = getTypeByID(Record[0]);
2437 Value *Op = getFnValueByID(Record[1], OpTy);
2438 const Type *ResTy = getTypeByID(Record[2]);
2439 if (!OpTy || !Op || !ResTy)
2440 return Error("Invalid VAARG record");
2441 I = new VAArgInst(Op, ResTy);
2442 InstructionList.push_back(I);
2447 // Add instruction to end of current BB. If there is no current BB, reject
2451 return Error("Invalid instruction with no BB");
2453 CurBB->getInstList().push_back(I);
2455 // If this was a terminator instruction, move to the next block.
2456 if (isa<TerminatorInst>(I)) {
2458 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2461 // Non-void values get registered in the value table for future use.
2462 if (I && !I->getType()->isVoidTy())
2463 ValueList.AssignValue(I, NextValueNo++);
2466 // Check the function list for unresolved values.
2467 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2468 if (A->getParent() == 0) {
2469 // We found at least one unresolved value. Nuke them all to avoid leaks.
2470 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2471 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2472 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2476 return Error("Never resolved value found in function!");
2480 // FIXME: Check for unresolved forward-declared metadata references
2481 // and clean up leaks.
2483 // See if anything took the address of blocks in this function. If so,
2484 // resolve them now.
2485 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2486 BlockAddrFwdRefs.find(F);
2487 if (BAFRI != BlockAddrFwdRefs.end()) {
2488 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2489 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2490 unsigned BlockIdx = RefList[i].first;
2491 if (BlockIdx >= FunctionBBs.size())
2492 return Error("Invalid blockaddress block #");
2494 GlobalVariable *FwdRef = RefList[i].second;
2495 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2496 FwdRef->eraseFromParent();
2499 BlockAddrFwdRefs.erase(BAFRI);
2502 // FIXME: Remove this in LLVM 3.0.
2503 unsigned NewMDValueListSize = MDValueList.size();
2505 // Trim the value list down to the size it was before we parsed this function.
2506 ValueList.shrinkTo(ModuleValueListSize);
2507 MDValueList.shrinkTo(ModuleMDValueListSize);
2509 // Backwards compatibility hack: Function-local metadata numbers
2510 // were previously not reset between functions. This is now fixed,
2511 // however we still need to understand the old numbering in order
2512 // to be able to read old bitcode files.
2513 // FIXME: Remove this in LLVM 3.0.
2514 if (LLVM2_7MetadataDetected)
2515 MDValueList.resize(NewMDValueListSize);
2517 std::vector<BasicBlock*>().swap(FunctionBBs);
2522 //===----------------------------------------------------------------------===//
2523 // GVMaterializer implementation
2524 //===----------------------------------------------------------------------===//
2527 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2528 if (const Function *F = dyn_cast<Function>(GV)) {
2529 return F->isDeclaration() &&
2530 DeferredFunctionInfo.count(const_cast<Function*>(F));
2535 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2536 Function *F = dyn_cast<Function>(GV);
2537 // If it's not a function or is already material, ignore the request.
2538 if (!F || !F->isMaterializable()) return false;
2540 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2541 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2543 // Move the bit stream to the saved position of the deferred function body.
2544 Stream.JumpToBit(DFII->second);
2546 if (ParseFunctionBody(F)) {
2547 if (ErrInfo) *ErrInfo = ErrorString;
2551 // Upgrade any old intrinsic calls in the function.
2552 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2553 E = UpgradedIntrinsics.end(); I != E; ++I) {
2554 if (I->first != I->second) {
2555 for (Value::use_iterator UI = I->first->use_begin(),
2556 UE = I->first->use_end(); UI != UE; ) {
2557 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2558 UpgradeIntrinsicCall(CI, I->second);
2566 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2567 const Function *F = dyn_cast<Function>(GV);
2568 if (!F || F->isDeclaration())
2570 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2573 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2574 Function *F = dyn_cast<Function>(GV);
2575 // If this function isn't dematerializable, this is a noop.
2576 if (!F || !isDematerializable(F))
2579 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2581 // Just forget the function body, we can remat it later.
2586 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2587 assert(M == TheModule &&
2588 "Can only Materialize the Module this BitcodeReader is attached to.");
2589 // Iterate over the module, deserializing any functions that are still on
2591 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2593 if (F->isMaterializable() &&
2594 Materialize(F, ErrInfo))
2597 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2598 // delete the old functions to clean up. We can't do this unless the entire
2599 // module is materialized because there could always be another function body
2600 // with calls to the old function.
2601 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2602 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2603 if (I->first != I->second) {
2604 for (Value::use_iterator UI = I->first->use_begin(),
2605 UE = I->first->use_end(); UI != UE; ) {
2606 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2607 UpgradeIntrinsicCall(CI, I->second);
2609 if (!I->first->use_empty())
2610 I->first->replaceAllUsesWith(I->second);
2611 I->first->eraseFromParent();
2614 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2616 // Check debug info intrinsics.
2617 CheckDebugInfoIntrinsics(TheModule);
2623 //===----------------------------------------------------------------------===//
2624 // External interface
2625 //===----------------------------------------------------------------------===//
2627 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2629 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2630 LLVMContext& Context,
2631 std::string *ErrMsg) {
2632 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2633 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2634 M->setMaterializer(R);
2635 if (R->ParseBitcodeInto(M)) {
2637 *ErrMsg = R->getErrorString();
2639 delete M; // Also deletes R.
2642 // Have the BitcodeReader dtor delete 'Buffer'.
2643 R->setBufferOwned(true);
2647 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2648 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2649 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2650 std::string *ErrMsg){
2651 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2654 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2655 // there was an error.
2656 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2658 // Read in the entire module, and destroy the BitcodeReader.
2659 if (M->MaterializeAllPermanently(ErrMsg)) {
2667 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
2668 LLVMContext& Context,
2669 std::string *ErrMsg) {
2670 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2671 // Don't let the BitcodeReader dtor delete 'Buffer'.
2672 R->setBufferOwned(false);
2674 std::string Triple("");
2675 if (R->ParseTriple(Triple))
2677 *ErrMsg = R->getErrorString();