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> :
166 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
171 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
180 WeakVH &OldV = ValuePtrs[Idx];
186 // Handle constants and non-constants (e.g. instrs) differently for
188 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
189 ResolveConstants.push_back(std::make_pair(PHC, Idx));
192 // If there was a forward reference to this value, replace it.
193 Value *PrevVal = OldV;
194 OldV->replaceAllUsesWith(V);
200 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
205 if (Value *V = ValuePtrs[Idx]) {
206 assert(Ty == V->getType() && "Type mismatch in constant table!");
207 return cast<Constant>(V);
210 // Create and return a placeholder, which will later be RAUW'd.
211 Constant *C = new ConstantPlaceHolder(Ty, Context);
216 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, const Type *Ty) {
220 if (Value *V = ValuePtrs[Idx]) {
221 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
225 // No type specified, must be invalid reference.
226 if (Ty == 0) return 0;
228 // Create and return a placeholder, which will later be RAUW'd.
229 Value *V = new Argument(Ty);
234 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
235 /// resolves any forward references. The idea behind this is that we sometimes
236 /// get constants (such as large arrays) which reference *many* forward ref
237 /// constants. Replacing each of these causes a lot of thrashing when
238 /// building/reuniquing the constant. Instead of doing this, we look at all the
239 /// uses and rewrite all the place holders at once for any constant that uses
241 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
242 // Sort the values by-pointer so that they are efficient to look up with a
244 std::sort(ResolveConstants.begin(), ResolveConstants.end());
246 SmallVector<Constant*, 64> NewOps;
248 while (!ResolveConstants.empty()) {
249 Value *RealVal = operator[](ResolveConstants.back().second);
250 Constant *Placeholder = ResolveConstants.back().first;
251 ResolveConstants.pop_back();
253 // Loop over all users of the placeholder, updating them to reference the
254 // new value. If they reference more than one placeholder, update them all
256 while (!Placeholder->use_empty()) {
257 Value::use_iterator UI = Placeholder->use_begin();
260 // If the using object isn't uniqued, just update the operands. This
261 // handles instructions and initializers for global variables.
262 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
263 UI.getUse().set(RealVal);
267 // Otherwise, we have a constant that uses the placeholder. Replace that
268 // constant with a new constant that has *all* placeholder uses updated.
269 Constant *UserC = cast<Constant>(U);
270 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
273 if (!isa<ConstantPlaceHolder>(*I)) {
274 // Not a placeholder reference.
276 } else if (*I == Placeholder) {
277 // Common case is that it just references this one placeholder.
280 // Otherwise, look up the placeholder in ResolveConstants.
281 ResolveConstantsTy::iterator It =
282 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
283 std::pair<Constant*, unsigned>(cast<Constant>(*I),
285 assert(It != ResolveConstants.end() && It->first == *I);
286 NewOp = operator[](It->second);
289 NewOps.push_back(cast<Constant>(NewOp));
292 // Make the new constant.
294 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
295 NewC = ConstantArray::get(UserCA->getType(), &NewOps[0],
297 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
298 NewC = ConstantStruct::get(Context, &NewOps[0], NewOps.size(),
299 UserCS->getType()->isPacked());
300 } else if (isa<ConstantVector>(UserC)) {
301 NewC = ConstantVector::get(NewOps);
303 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
304 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
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, ArrayRef<Value*>());
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, Elts, IsFunctionLocal);
847 IsFunctionLocal = false;
848 MDValueList.AssignValue(V, NextMDValueNo++);
851 case bitc::METADATA_STRING: {
852 unsigned MDStringLength = Record.size();
853 SmallString<8> String;
854 String.resize(MDStringLength);
855 for (unsigned i = 0; i != MDStringLength; ++i)
856 String[i] = Record[i];
857 Value *V = MDString::get(Context,
858 StringRef(String.data(), String.size()));
859 MDValueList.AssignValue(V, NextMDValueNo++);
862 case bitc::METADATA_KIND: {
863 unsigned RecordLength = Record.size();
864 if (Record.empty() || RecordLength < 2)
865 return Error("Invalid METADATA_KIND record");
867 Name.resize(RecordLength-1);
868 unsigned Kind = Record[0];
869 for (unsigned i = 1; i != RecordLength; ++i)
870 Name[i-1] = Record[i];
872 unsigned NewKind = TheModule->getMDKindID(Name.str());
873 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
874 return Error("Conflicting METADATA_KIND records");
881 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
882 /// the LSB for dense VBR encoding.
883 static uint64_t DecodeSignRotatedValue(uint64_t V) {
888 // There is no such thing as -0 with integers. "-0" really means MININT.
892 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
893 /// values and aliases that we can.
894 bool BitcodeReader::ResolveGlobalAndAliasInits() {
895 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
896 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
898 GlobalInitWorklist.swap(GlobalInits);
899 AliasInitWorklist.swap(AliasInits);
901 while (!GlobalInitWorklist.empty()) {
902 unsigned ValID = GlobalInitWorklist.back().second;
903 if (ValID >= ValueList.size()) {
904 // Not ready to resolve this yet, it requires something later in the file.
905 GlobalInits.push_back(GlobalInitWorklist.back());
907 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
908 GlobalInitWorklist.back().first->setInitializer(C);
910 return Error("Global variable initializer is not a constant!");
912 GlobalInitWorklist.pop_back();
915 while (!AliasInitWorklist.empty()) {
916 unsigned ValID = AliasInitWorklist.back().second;
917 if (ValID >= ValueList.size()) {
918 AliasInits.push_back(AliasInitWorklist.back());
920 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
921 AliasInitWorklist.back().first->setAliasee(C);
923 return Error("Alias initializer is not a constant!");
925 AliasInitWorklist.pop_back();
930 bool BitcodeReader::ParseConstants() {
931 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
932 return Error("Malformed block record");
934 SmallVector<uint64_t, 64> Record;
936 // Read all the records for this value table.
937 const Type *CurTy = Type::getInt32Ty(Context);
938 unsigned NextCstNo = ValueList.size();
940 unsigned Code = Stream.ReadCode();
941 if (Code == bitc::END_BLOCK)
944 if (Code == bitc::ENTER_SUBBLOCK) {
945 // No known subblocks, always skip them.
946 Stream.ReadSubBlockID();
947 if (Stream.SkipBlock())
948 return Error("Malformed block record");
952 if (Code == bitc::DEFINE_ABBREV) {
953 Stream.ReadAbbrevRecord();
960 unsigned BitCode = Stream.ReadRecord(Code, Record);
962 default: // Default behavior: unknown constant
963 case bitc::CST_CODE_UNDEF: // UNDEF
964 V = UndefValue::get(CurTy);
966 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
968 return Error("Malformed CST_SETTYPE record");
969 if (Record[0] >= TypeList.size())
970 return Error("Invalid Type ID in CST_SETTYPE record");
971 CurTy = TypeList[Record[0]];
972 continue; // Skip the ValueList manipulation.
973 case bitc::CST_CODE_NULL: // NULL
974 V = Constant::getNullValue(CurTy);
976 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
977 if (!CurTy->isIntegerTy() || Record.empty())
978 return Error("Invalid CST_INTEGER record");
979 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
981 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
982 if (!CurTy->isIntegerTy() || Record.empty())
983 return Error("Invalid WIDE_INTEGER record");
985 unsigned NumWords = Record.size();
986 SmallVector<uint64_t, 8> Words;
987 Words.resize(NumWords);
988 for (unsigned i = 0; i != NumWords; ++i)
989 Words[i] = DecodeSignRotatedValue(Record[i]);
990 V = ConstantInt::get(Context,
991 APInt(cast<IntegerType>(CurTy)->getBitWidth(),
992 NumWords, &Words[0]));
995 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
997 return Error("Invalid FLOAT record");
998 if (CurTy->isFloatTy())
999 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1000 else if (CurTy->isDoubleTy())
1001 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1002 else if (CurTy->isX86_FP80Ty()) {
1003 // Bits are not stored the same way as a normal i80 APInt, compensate.
1004 uint64_t Rearrange[2];
1005 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1006 Rearrange[1] = Record[0] >> 48;
1007 V = ConstantFP::get(Context, APFloat(APInt(80, 2, Rearrange)));
1008 } else if (CurTy->isFP128Ty())
1009 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0]), true));
1010 else if (CurTy->isPPC_FP128Ty())
1011 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0])));
1013 V = UndefValue::get(CurTy);
1017 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1019 return Error("Invalid CST_AGGREGATE record");
1021 unsigned Size = Record.size();
1022 std::vector<Constant*> Elts;
1024 if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
1025 for (unsigned i = 0; i != Size; ++i)
1026 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1027 STy->getElementType(i)));
1028 V = ConstantStruct::get(STy, Elts);
1029 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1030 const Type *EltTy = ATy->getElementType();
1031 for (unsigned i = 0; i != Size; ++i)
1032 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1033 V = ConstantArray::get(ATy, Elts);
1034 } else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1035 const Type *EltTy = VTy->getElementType();
1036 for (unsigned i = 0; i != Size; ++i)
1037 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1038 V = ConstantVector::get(Elts);
1040 V = UndefValue::get(CurTy);
1044 case bitc::CST_CODE_STRING: { // STRING: [values]
1046 return Error("Invalid CST_AGGREGATE record");
1048 const ArrayType *ATy = cast<ArrayType>(CurTy);
1049 const Type *EltTy = ATy->getElementType();
1051 unsigned Size = Record.size();
1052 std::vector<Constant*> Elts;
1053 for (unsigned i = 0; i != Size; ++i)
1054 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1055 V = ConstantArray::get(ATy, Elts);
1058 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1060 return Error("Invalid CST_AGGREGATE record");
1062 const ArrayType *ATy = cast<ArrayType>(CurTy);
1063 const Type *EltTy = ATy->getElementType();
1065 unsigned Size = Record.size();
1066 std::vector<Constant*> Elts;
1067 for (unsigned i = 0; i != Size; ++i)
1068 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1069 Elts.push_back(Constant::getNullValue(EltTy));
1070 V = ConstantArray::get(ATy, Elts);
1073 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1074 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1075 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1077 V = UndefValue::get(CurTy); // Unknown binop.
1079 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1080 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1082 if (Record.size() >= 4) {
1083 if (Opc == Instruction::Add ||
1084 Opc == Instruction::Sub ||
1085 Opc == Instruction::Mul ||
1086 Opc == Instruction::Shl) {
1087 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1088 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1089 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1090 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1091 } else if (Opc == Instruction::SDiv ||
1092 Opc == Instruction::UDiv ||
1093 Opc == Instruction::LShr ||
1094 Opc == Instruction::AShr) {
1095 if (Record[3] & (1 << bitc::PEO_EXACT))
1096 Flags |= SDivOperator::IsExact;
1099 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1103 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1104 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1105 int Opc = GetDecodedCastOpcode(Record[0]);
1107 V = UndefValue::get(CurTy); // Unknown cast.
1109 const Type *OpTy = getTypeByID(Record[1]);
1110 if (!OpTy) return Error("Invalid CE_CAST record");
1111 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1112 V = ConstantExpr::getCast(Opc, Op, CurTy);
1116 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1117 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1118 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1119 SmallVector<Constant*, 16> Elts;
1120 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1121 const Type *ElTy = getTypeByID(Record[i]);
1122 if (!ElTy) return Error("Invalid CE_GEP record");
1123 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1125 if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
1126 V = ConstantExpr::getInBoundsGetElementPtr(Elts[0], &Elts[1],
1129 V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1],
1133 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1134 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1135 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1136 Type::getInt1Ty(Context)),
1137 ValueList.getConstantFwdRef(Record[1],CurTy),
1138 ValueList.getConstantFwdRef(Record[2],CurTy));
1140 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1141 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1142 const VectorType *OpTy =
1143 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1144 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1145 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1146 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1147 V = ConstantExpr::getExtractElement(Op0, Op1);
1150 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1151 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1152 if (Record.size() < 3 || OpTy == 0)
1153 return Error("Invalid CE_INSERTELT record");
1154 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1155 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1156 OpTy->getElementType());
1157 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1158 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1161 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1162 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1163 if (Record.size() < 3 || OpTy == 0)
1164 return Error("Invalid CE_SHUFFLEVEC record");
1165 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1166 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1167 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1168 OpTy->getNumElements());
1169 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1170 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1173 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1174 const VectorType *RTy = dyn_cast<VectorType>(CurTy);
1175 const VectorType *OpTy =
1176 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1177 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1178 return Error("Invalid CE_SHUFVEC_EX record");
1179 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1180 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1181 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1182 RTy->getNumElements());
1183 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1184 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1187 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1188 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1189 const Type *OpTy = getTypeByID(Record[0]);
1190 if (OpTy == 0) return Error("Invalid CE_CMP record");
1191 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1192 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1194 if (OpTy->isFPOrFPVectorTy())
1195 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1197 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1200 case bitc::CST_CODE_INLINEASM: {
1201 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1202 std::string AsmStr, ConstrStr;
1203 bool HasSideEffects = Record[0] & 1;
1204 bool IsAlignStack = Record[0] >> 1;
1205 unsigned AsmStrSize = Record[1];
1206 if (2+AsmStrSize >= Record.size())
1207 return Error("Invalid INLINEASM record");
1208 unsigned ConstStrSize = Record[2+AsmStrSize];
1209 if (3+AsmStrSize+ConstStrSize > Record.size())
1210 return Error("Invalid INLINEASM record");
1212 for (unsigned i = 0; i != AsmStrSize; ++i)
1213 AsmStr += (char)Record[2+i];
1214 for (unsigned i = 0; i != ConstStrSize; ++i)
1215 ConstrStr += (char)Record[3+AsmStrSize+i];
1216 const PointerType *PTy = cast<PointerType>(CurTy);
1217 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1218 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1221 case bitc::CST_CODE_BLOCKADDRESS:{
1222 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1223 const Type *FnTy = getTypeByID(Record[0]);
1224 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1226 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1227 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1229 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1230 Type::getInt8Ty(Context),
1231 false, GlobalValue::InternalLinkage,
1233 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1239 ValueList.AssignValue(V, NextCstNo);
1243 if (NextCstNo != ValueList.size())
1244 return Error("Invalid constant reference!");
1246 if (Stream.ReadBlockEnd())
1247 return Error("Error at end of constants block");
1249 // Once all the constants have been read, go through and resolve forward
1251 ValueList.ResolveConstantForwardRefs();
1255 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1256 /// remember where it is and then skip it. This lets us lazily deserialize the
1258 bool BitcodeReader::RememberAndSkipFunctionBody() {
1259 // Get the function we are talking about.
1260 if (FunctionsWithBodies.empty())
1261 return Error("Insufficient function protos");
1263 Function *Fn = FunctionsWithBodies.back();
1264 FunctionsWithBodies.pop_back();
1266 // Save the current stream state.
1267 uint64_t CurBit = Stream.GetCurrentBitNo();
1268 DeferredFunctionInfo[Fn] = CurBit;
1270 // Skip over the function block for now.
1271 if (Stream.SkipBlock())
1272 return Error("Malformed block record");
1276 bool BitcodeReader::ParseModule() {
1277 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1278 return Error("Malformed block record");
1280 SmallVector<uint64_t, 64> Record;
1281 std::vector<std::string> SectionTable;
1282 std::vector<std::string> GCTable;
1284 // Read all the records for this module.
1285 while (!Stream.AtEndOfStream()) {
1286 unsigned Code = Stream.ReadCode();
1287 if (Code == bitc::END_BLOCK) {
1288 if (Stream.ReadBlockEnd())
1289 return Error("Error at end of module block");
1291 // Patch the initializers for globals and aliases up.
1292 ResolveGlobalAndAliasInits();
1293 if (!GlobalInits.empty() || !AliasInits.empty())
1294 return Error("Malformed global initializer set");
1295 if (!FunctionsWithBodies.empty())
1296 return Error("Too few function bodies found");
1298 // Look for intrinsic functions which need to be upgraded at some point
1299 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1302 if (UpgradeIntrinsicFunction(FI, NewFn))
1303 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1306 // Look for global variables which need to be renamed.
1307 for (Module::global_iterator
1308 GI = TheModule->global_begin(), GE = TheModule->global_end();
1310 UpgradeGlobalVariable(GI);
1312 // Force deallocation of memory for these vectors to favor the client that
1313 // want lazy deserialization.
1314 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1315 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1316 std::vector<Function*>().swap(FunctionsWithBodies);
1320 if (Code == bitc::ENTER_SUBBLOCK) {
1321 switch (Stream.ReadSubBlockID()) {
1322 default: // Skip unknown content.
1323 if (Stream.SkipBlock())
1324 return Error("Malformed block record");
1326 case bitc::BLOCKINFO_BLOCK_ID:
1327 if (Stream.ReadBlockInfoBlock())
1328 return Error("Malformed BlockInfoBlock");
1330 case bitc::PARAMATTR_BLOCK_ID:
1331 if (ParseAttributeBlock())
1334 case bitc::TYPE_BLOCK_ID:
1335 if (ParseTypeTable())
1338 case bitc::TYPE_SYMTAB_BLOCK_ID:
1339 if (ParseTypeSymbolTable())
1342 case bitc::VALUE_SYMTAB_BLOCK_ID:
1343 if (ParseValueSymbolTable())
1346 case bitc::CONSTANTS_BLOCK_ID:
1347 if (ParseConstants() || ResolveGlobalAndAliasInits())
1350 case bitc::METADATA_BLOCK_ID:
1351 if (ParseMetadata())
1354 case bitc::FUNCTION_BLOCK_ID:
1355 // If this is the first function body we've seen, reverse the
1356 // FunctionsWithBodies list.
1357 if (!HasReversedFunctionsWithBodies) {
1358 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1359 HasReversedFunctionsWithBodies = true;
1362 if (RememberAndSkipFunctionBody())
1369 if (Code == bitc::DEFINE_ABBREV) {
1370 Stream.ReadAbbrevRecord();
1375 switch (Stream.ReadRecord(Code, Record)) {
1376 default: break; // Default behavior, ignore unknown content.
1377 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1378 if (Record.size() < 1)
1379 return Error("Malformed MODULE_CODE_VERSION");
1380 // Only version #0 is supported so far.
1382 return Error("Unknown bitstream version!");
1384 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1386 if (ConvertToString(Record, 0, S))
1387 return Error("Invalid MODULE_CODE_TRIPLE record");
1388 TheModule->setTargetTriple(S);
1391 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1393 if (ConvertToString(Record, 0, S))
1394 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1395 TheModule->setDataLayout(S);
1398 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1400 if (ConvertToString(Record, 0, S))
1401 return Error("Invalid MODULE_CODE_ASM record");
1402 TheModule->setModuleInlineAsm(S);
1405 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1407 if (ConvertToString(Record, 0, S))
1408 return Error("Invalid MODULE_CODE_DEPLIB record");
1409 TheModule->addLibrary(S);
1412 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1414 if (ConvertToString(Record, 0, S))
1415 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1416 SectionTable.push_back(S);
1419 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1421 if (ConvertToString(Record, 0, S))
1422 return Error("Invalid MODULE_CODE_GCNAME record");
1423 GCTable.push_back(S);
1426 // GLOBALVAR: [pointer type, isconst, initid,
1427 // linkage, alignment, section, visibility, threadlocal,
1429 case bitc::MODULE_CODE_GLOBALVAR: {
1430 if (Record.size() < 6)
1431 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1432 const Type *Ty = getTypeByID(Record[0]);
1433 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1434 if (!Ty->isPointerTy())
1435 return Error("Global not a pointer type!");
1436 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1437 Ty = cast<PointerType>(Ty)->getElementType();
1439 bool isConstant = Record[1];
1440 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1441 unsigned Alignment = (1 << Record[4]) >> 1;
1442 std::string Section;
1444 if (Record[5]-1 >= SectionTable.size())
1445 return Error("Invalid section ID");
1446 Section = SectionTable[Record[5]-1];
1448 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1449 if (Record.size() > 6)
1450 Visibility = GetDecodedVisibility(Record[6]);
1451 bool isThreadLocal = false;
1452 if (Record.size() > 7)
1453 isThreadLocal = Record[7];
1455 bool UnnamedAddr = false;
1456 if (Record.size() > 8)
1457 UnnamedAddr = Record[8];
1459 GlobalVariable *NewGV =
1460 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1461 isThreadLocal, AddressSpace);
1462 NewGV->setAlignment(Alignment);
1463 if (!Section.empty())
1464 NewGV->setSection(Section);
1465 NewGV->setVisibility(Visibility);
1466 NewGV->setThreadLocal(isThreadLocal);
1467 NewGV->setUnnamedAddr(UnnamedAddr);
1469 ValueList.push_back(NewGV);
1471 // Remember which value to use for the global initializer.
1472 if (unsigned InitID = Record[2])
1473 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1476 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1477 // alignment, section, visibility, gc, unnamed_addr]
1478 case bitc::MODULE_CODE_FUNCTION: {
1479 if (Record.size() < 8)
1480 return Error("Invalid MODULE_CODE_FUNCTION record");
1481 const Type *Ty = getTypeByID(Record[0]);
1482 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1483 if (!Ty->isPointerTy())
1484 return Error("Function not a pointer type!");
1485 const FunctionType *FTy =
1486 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1488 return Error("Function not a pointer to function type!");
1490 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1493 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1494 bool isProto = Record[2];
1495 Func->setLinkage(GetDecodedLinkage(Record[3]));
1496 Func->setAttributes(getAttributes(Record[4]));
1498 Func->setAlignment((1 << Record[5]) >> 1);
1500 if (Record[6]-1 >= SectionTable.size())
1501 return Error("Invalid section ID");
1502 Func->setSection(SectionTable[Record[6]-1]);
1504 Func->setVisibility(GetDecodedVisibility(Record[7]));
1505 if (Record.size() > 8 && Record[8]) {
1506 if (Record[8]-1 > GCTable.size())
1507 return Error("Invalid GC ID");
1508 Func->setGC(GCTable[Record[8]-1].c_str());
1510 bool UnnamedAddr = false;
1511 if (Record.size() > 9)
1512 UnnamedAddr = Record[9];
1513 Func->setUnnamedAddr(UnnamedAddr);
1514 ValueList.push_back(Func);
1516 // If this is a function with a body, remember the prototype we are
1517 // creating now, so that we can match up the body with them later.
1519 FunctionsWithBodies.push_back(Func);
1522 // ALIAS: [alias type, aliasee val#, linkage]
1523 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1524 case bitc::MODULE_CODE_ALIAS: {
1525 if (Record.size() < 3)
1526 return Error("Invalid MODULE_ALIAS record");
1527 const Type *Ty = getTypeByID(Record[0]);
1528 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1529 if (!Ty->isPointerTy())
1530 return Error("Function not a pointer type!");
1532 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1534 // Old bitcode files didn't have visibility field.
1535 if (Record.size() > 3)
1536 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1537 ValueList.push_back(NewGA);
1538 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1541 /// MODULE_CODE_PURGEVALS: [numvals]
1542 case bitc::MODULE_CODE_PURGEVALS:
1543 // Trim down the value list to the specified size.
1544 if (Record.size() < 1 || Record[0] > ValueList.size())
1545 return Error("Invalid MODULE_PURGEVALS record");
1546 ValueList.shrinkTo(Record[0]);
1552 return Error("Premature end of bitstream");
1555 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1558 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1559 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1561 if (Buffer->getBufferSize() & 3) {
1562 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
1563 return Error("Invalid bitcode signature");
1565 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1568 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1569 // The magic number is 0x0B17C0DE stored in little endian.
1570 if (isBitcodeWrapper(BufPtr, BufEnd))
1571 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1572 return Error("Invalid bitcode wrapper header");
1574 StreamFile.init(BufPtr, BufEnd);
1575 Stream.init(StreamFile);
1577 // Sniff for the signature.
1578 if (Stream.Read(8) != 'B' ||
1579 Stream.Read(8) != 'C' ||
1580 Stream.Read(4) != 0x0 ||
1581 Stream.Read(4) != 0xC ||
1582 Stream.Read(4) != 0xE ||
1583 Stream.Read(4) != 0xD)
1584 return Error("Invalid bitcode signature");
1586 // We expect a number of well-defined blocks, though we don't necessarily
1587 // need to understand them all.
1588 while (!Stream.AtEndOfStream()) {
1589 unsigned Code = Stream.ReadCode();
1591 if (Code != bitc::ENTER_SUBBLOCK) {
1593 // The ranlib in xcode 4 will align archive members by appending newlines to the
1594 // end of them. If this file size is a multiple of 4 but not 8, we have to read and
1595 // ignore these final 4 bytes :-(
1596 if (Stream.GetAbbrevIDWidth() == 2 && Code == 2 &&
1597 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1598 Stream.AtEndOfStream())
1601 return Error("Invalid record at top-level");
1604 unsigned BlockID = Stream.ReadSubBlockID();
1606 // We only know the MODULE subblock ID.
1608 case bitc::BLOCKINFO_BLOCK_ID:
1609 if (Stream.ReadBlockInfoBlock())
1610 return Error("Malformed BlockInfoBlock");
1612 case bitc::MODULE_BLOCK_ID:
1613 // Reject multiple MODULE_BLOCK's in a single bitstream.
1615 return Error("Multiple MODULE_BLOCKs in same stream");
1621 if (Stream.SkipBlock())
1622 return Error("Malformed block record");
1630 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1631 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1632 return Error("Malformed block record");
1634 SmallVector<uint64_t, 64> Record;
1636 // Read all the records for this module.
1637 while (!Stream.AtEndOfStream()) {
1638 unsigned Code = Stream.ReadCode();
1639 if (Code == bitc::END_BLOCK) {
1640 if (Stream.ReadBlockEnd())
1641 return Error("Error at end of module block");
1646 if (Code == bitc::ENTER_SUBBLOCK) {
1647 switch (Stream.ReadSubBlockID()) {
1648 default: // Skip unknown content.
1649 if (Stream.SkipBlock())
1650 return Error("Malformed block record");
1656 if (Code == bitc::DEFINE_ABBREV) {
1657 Stream.ReadAbbrevRecord();
1662 switch (Stream.ReadRecord(Code, Record)) {
1663 default: break; // Default behavior, ignore unknown content.
1664 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1665 if (Record.size() < 1)
1666 return Error("Malformed MODULE_CODE_VERSION");
1667 // Only version #0 is supported so far.
1669 return Error("Unknown bitstream version!");
1671 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1673 if (ConvertToString(Record, 0, S))
1674 return Error("Invalid MODULE_CODE_TRIPLE record");
1682 return Error("Premature end of bitstream");
1685 bool BitcodeReader::ParseTriple(std::string &Triple) {
1686 if (Buffer->getBufferSize() & 3)
1687 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1689 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1690 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1692 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1693 // The magic number is 0x0B17C0DE stored in little endian.
1694 if (isBitcodeWrapper(BufPtr, BufEnd))
1695 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1696 return Error("Invalid bitcode wrapper header");
1698 StreamFile.init(BufPtr, BufEnd);
1699 Stream.init(StreamFile);
1701 // Sniff for the signature.
1702 if (Stream.Read(8) != 'B' ||
1703 Stream.Read(8) != 'C' ||
1704 Stream.Read(4) != 0x0 ||
1705 Stream.Read(4) != 0xC ||
1706 Stream.Read(4) != 0xE ||
1707 Stream.Read(4) != 0xD)
1708 return Error("Invalid bitcode signature");
1710 // We expect a number of well-defined blocks, though we don't necessarily
1711 // need to understand them all.
1712 while (!Stream.AtEndOfStream()) {
1713 unsigned Code = Stream.ReadCode();
1715 if (Code != bitc::ENTER_SUBBLOCK)
1716 return Error("Invalid record at top-level");
1718 unsigned BlockID = Stream.ReadSubBlockID();
1720 // We only know the MODULE subblock ID.
1722 case bitc::MODULE_BLOCK_ID:
1723 if (ParseModuleTriple(Triple))
1727 if (Stream.SkipBlock())
1728 return Error("Malformed block record");
1736 /// ParseMetadataAttachment - Parse metadata attachments.
1737 bool BitcodeReader::ParseMetadataAttachment() {
1738 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1739 return Error("Malformed block record");
1741 SmallVector<uint64_t, 64> Record;
1743 unsigned Code = Stream.ReadCode();
1744 if (Code == bitc::END_BLOCK) {
1745 if (Stream.ReadBlockEnd())
1746 return Error("Error at end of PARAMATTR block");
1749 if (Code == bitc::DEFINE_ABBREV) {
1750 Stream.ReadAbbrevRecord();
1753 // Read a metadata attachment record.
1755 switch (Stream.ReadRecord(Code, Record)) {
1756 default: // Default behavior: ignore.
1758 // FIXME: Remove in LLVM 3.0.
1759 case bitc::METADATA_ATTACHMENT:
1760 LLVM2_7MetadataDetected = true;
1761 case bitc::METADATA_ATTACHMENT2: {
1762 unsigned RecordLength = Record.size();
1763 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1764 return Error ("Invalid METADATA_ATTACHMENT reader!");
1765 Instruction *Inst = InstructionList[Record[0]];
1766 for (unsigned i = 1; i != RecordLength; i = i+2) {
1767 unsigned Kind = Record[i];
1768 DenseMap<unsigned, unsigned>::iterator I =
1769 MDKindMap.find(Kind);
1770 if (I == MDKindMap.end())
1771 return Error("Invalid metadata kind ID");
1772 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1773 Inst->setMetadata(I->second, cast<MDNode>(Node));
1782 /// ParseFunctionBody - Lazily parse the specified function body block.
1783 bool BitcodeReader::ParseFunctionBody(Function *F) {
1784 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1785 return Error("Malformed block record");
1787 InstructionList.clear();
1788 unsigned ModuleValueListSize = ValueList.size();
1789 unsigned ModuleMDValueListSize = MDValueList.size();
1791 // Add all the function arguments to the value table.
1792 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1793 ValueList.push_back(I);
1795 unsigned NextValueNo = ValueList.size();
1796 BasicBlock *CurBB = 0;
1797 unsigned CurBBNo = 0;
1801 // Read all the records.
1802 SmallVector<uint64_t, 64> Record;
1804 unsigned Code = Stream.ReadCode();
1805 if (Code == bitc::END_BLOCK) {
1806 if (Stream.ReadBlockEnd())
1807 return Error("Error at end of function block");
1811 if (Code == bitc::ENTER_SUBBLOCK) {
1812 switch (Stream.ReadSubBlockID()) {
1813 default: // Skip unknown content.
1814 if (Stream.SkipBlock())
1815 return Error("Malformed block record");
1817 case bitc::CONSTANTS_BLOCK_ID:
1818 if (ParseConstants()) return true;
1819 NextValueNo = ValueList.size();
1821 case bitc::VALUE_SYMTAB_BLOCK_ID:
1822 if (ParseValueSymbolTable()) return true;
1824 case bitc::METADATA_ATTACHMENT_ID:
1825 if (ParseMetadataAttachment()) return true;
1827 case bitc::METADATA_BLOCK_ID:
1828 if (ParseMetadata()) return true;
1834 if (Code == bitc::DEFINE_ABBREV) {
1835 Stream.ReadAbbrevRecord();
1842 unsigned BitCode = Stream.ReadRecord(Code, Record);
1844 default: // Default behavior: reject
1845 return Error("Unknown instruction");
1846 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1847 if (Record.size() < 1 || Record[0] == 0)
1848 return Error("Invalid DECLAREBLOCKS record");
1849 // Create all the basic blocks for the function.
1850 FunctionBBs.resize(Record[0]);
1851 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1852 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1853 CurBB = FunctionBBs[0];
1856 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1857 // This record indicates that the last instruction is at the same
1858 // location as the previous instruction with a location.
1861 // Get the last instruction emitted.
1862 if (CurBB && !CurBB->empty())
1864 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1865 !FunctionBBs[CurBBNo-1]->empty())
1866 I = &FunctionBBs[CurBBNo-1]->back();
1868 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1869 I->setDebugLoc(LastLoc);
1873 // FIXME: Remove this in LLVM 3.0.
1874 case bitc::FUNC_CODE_DEBUG_LOC:
1875 LLVM2_7MetadataDetected = true;
1876 case bitc::FUNC_CODE_DEBUG_LOC2: { // DEBUG_LOC: [line, col, scope, ia]
1877 I = 0; // Get the last instruction emitted.
1878 if (CurBB && !CurBB->empty())
1880 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1881 !FunctionBBs[CurBBNo-1]->empty())
1882 I = &FunctionBBs[CurBBNo-1]->back();
1883 if (I == 0 || Record.size() < 4)
1884 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
1886 unsigned Line = Record[0], Col = Record[1];
1887 unsigned ScopeID = Record[2], IAID = Record[3];
1889 MDNode *Scope = 0, *IA = 0;
1890 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
1891 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
1892 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
1893 I->setDebugLoc(LastLoc);
1898 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1901 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1902 getValue(Record, OpNum, LHS->getType(), RHS) ||
1903 OpNum+1 > Record.size())
1904 return Error("Invalid BINOP record");
1906 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
1907 if (Opc == -1) return Error("Invalid BINOP record");
1908 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
1909 InstructionList.push_back(I);
1910 if (OpNum < Record.size()) {
1911 if (Opc == Instruction::Add ||
1912 Opc == Instruction::Sub ||
1913 Opc == Instruction::Mul ||
1914 Opc == Instruction::Shl) {
1915 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1916 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
1917 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1918 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
1919 } else if (Opc == Instruction::SDiv ||
1920 Opc == Instruction::UDiv ||
1921 Opc == Instruction::LShr ||
1922 Opc == Instruction::AShr) {
1923 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
1924 cast<BinaryOperator>(I)->setIsExact(true);
1929 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
1932 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1933 OpNum+2 != Record.size())
1934 return Error("Invalid CAST record");
1936 const Type *ResTy = getTypeByID(Record[OpNum]);
1937 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
1938 if (Opc == -1 || ResTy == 0)
1939 return Error("Invalid CAST record");
1940 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
1941 InstructionList.push_back(I);
1944 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
1945 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
1948 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
1949 return Error("Invalid GEP record");
1951 SmallVector<Value*, 16> GEPIdx;
1952 while (OpNum != Record.size()) {
1954 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1955 return Error("Invalid GEP record");
1956 GEPIdx.push_back(Op);
1959 I = GetElementPtrInst::Create(BasePtr, GEPIdx.begin(), GEPIdx.end());
1960 InstructionList.push_back(I);
1961 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
1962 cast<GetElementPtrInst>(I)->setIsInBounds(true);
1966 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
1967 // EXTRACTVAL: [opty, opval, n x indices]
1970 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1971 return Error("Invalid EXTRACTVAL record");
1973 SmallVector<unsigned, 4> EXTRACTVALIdx;
1974 for (unsigned RecSize = Record.size();
1975 OpNum != RecSize; ++OpNum) {
1976 uint64_t Index = Record[OpNum];
1977 if ((unsigned)Index != Index)
1978 return Error("Invalid EXTRACTVAL index");
1979 EXTRACTVALIdx.push_back((unsigned)Index);
1982 I = ExtractValueInst::Create(Agg,
1983 EXTRACTVALIdx.begin(), EXTRACTVALIdx.end());
1984 InstructionList.push_back(I);
1988 case bitc::FUNC_CODE_INST_INSERTVAL: {
1989 // INSERTVAL: [opty, opval, opty, opval, n x indices]
1992 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1993 return Error("Invalid INSERTVAL record");
1995 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
1996 return Error("Invalid INSERTVAL record");
1998 SmallVector<unsigned, 4> INSERTVALIdx;
1999 for (unsigned RecSize = Record.size();
2000 OpNum != RecSize; ++OpNum) {
2001 uint64_t Index = Record[OpNum];
2002 if ((unsigned)Index != Index)
2003 return Error("Invalid INSERTVAL index");
2004 INSERTVALIdx.push_back((unsigned)Index);
2007 I = InsertValueInst::Create(Agg, Val,
2008 INSERTVALIdx.begin(), INSERTVALIdx.end());
2009 InstructionList.push_back(I);
2013 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2014 // obsolete form of select
2015 // handles select i1 ... in old bitcode
2017 Value *TrueVal, *FalseVal, *Cond;
2018 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2019 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2020 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
2021 return Error("Invalid SELECT record");
2023 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2024 InstructionList.push_back(I);
2028 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2029 // new form of select
2030 // handles select i1 or select [N x i1]
2032 Value *TrueVal, *FalseVal, *Cond;
2033 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2034 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2035 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2036 return Error("Invalid SELECT record");
2038 // select condition can be either i1 or [N x i1]
2039 if (const VectorType* vector_type =
2040 dyn_cast<const VectorType>(Cond->getType())) {
2042 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2043 return Error("Invalid SELECT condition type");
2046 if (Cond->getType() != Type::getInt1Ty(Context))
2047 return Error("Invalid SELECT condition type");
2050 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2051 InstructionList.push_back(I);
2055 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2058 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2059 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2060 return Error("Invalid EXTRACTELT record");
2061 I = ExtractElementInst::Create(Vec, Idx);
2062 InstructionList.push_back(I);
2066 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2068 Value *Vec, *Elt, *Idx;
2069 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2070 getValue(Record, OpNum,
2071 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2072 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2073 return Error("Invalid INSERTELT record");
2074 I = InsertElementInst::Create(Vec, Elt, Idx);
2075 InstructionList.push_back(I);
2079 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2081 Value *Vec1, *Vec2, *Mask;
2082 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2083 getValue(Record, OpNum, Vec1->getType(), Vec2))
2084 return Error("Invalid SHUFFLEVEC record");
2086 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2087 return Error("Invalid SHUFFLEVEC record");
2088 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2089 InstructionList.push_back(I);
2093 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2094 // Old form of ICmp/FCmp returning bool
2095 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2096 // both legal on vectors but had different behaviour.
2097 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2098 // FCmp/ICmp returning bool or vector of bool
2102 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2103 getValue(Record, OpNum, LHS->getType(), RHS) ||
2104 OpNum+1 != Record.size())
2105 return Error("Invalid CMP record");
2107 if (LHS->getType()->isFPOrFPVectorTy())
2108 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2110 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2111 InstructionList.push_back(I);
2115 case bitc::FUNC_CODE_INST_GETRESULT: { // GETRESULT: [ty, val, n]
2116 if (Record.size() != 2)
2117 return Error("Invalid GETRESULT record");
2120 getValueTypePair(Record, OpNum, NextValueNo, Op);
2121 unsigned Index = Record[1];
2122 I = ExtractValueInst::Create(Op, Index);
2123 InstructionList.push_back(I);
2127 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2129 unsigned Size = Record.size();
2131 I = ReturnInst::Create(Context);
2132 InstructionList.push_back(I);
2137 SmallVector<Value *,4> Vs;
2140 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2141 return Error("Invalid RET record");
2143 } while(OpNum != Record.size());
2145 const Type *ReturnType = F->getReturnType();
2146 // Handle multiple return values. FIXME: Remove in LLVM 3.0.
2147 if (Vs.size() > 1 ||
2148 (ReturnType->isStructTy() &&
2149 (Vs.empty() || Vs[0]->getType() != ReturnType))) {
2150 Value *RV = UndefValue::get(ReturnType);
2151 for (unsigned i = 0, e = Vs.size(); i != e; ++i) {
2152 I = InsertValueInst::Create(RV, Vs[i], i, "mrv");
2153 InstructionList.push_back(I);
2154 CurBB->getInstList().push_back(I);
2155 ValueList.AssignValue(I, NextValueNo++);
2158 I = ReturnInst::Create(Context, RV);
2159 InstructionList.push_back(I);
2163 I = ReturnInst::Create(Context, Vs[0]);
2164 InstructionList.push_back(I);
2167 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2168 if (Record.size() != 1 && Record.size() != 3)
2169 return Error("Invalid BR record");
2170 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2172 return Error("Invalid BR record");
2174 if (Record.size() == 1) {
2175 I = BranchInst::Create(TrueDest);
2176 InstructionList.push_back(I);
2179 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2180 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
2181 if (FalseDest == 0 || Cond == 0)
2182 return Error("Invalid BR record");
2183 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2184 InstructionList.push_back(I);
2188 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2189 if (Record.size() < 3 || (Record.size() & 1) == 0)
2190 return Error("Invalid SWITCH record");
2191 const Type *OpTy = getTypeByID(Record[0]);
2192 Value *Cond = getFnValueByID(Record[1], OpTy);
2193 BasicBlock *Default = getBasicBlock(Record[2]);
2194 if (OpTy == 0 || Cond == 0 || Default == 0)
2195 return Error("Invalid SWITCH record");
2196 unsigned NumCases = (Record.size()-3)/2;
2197 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2198 InstructionList.push_back(SI);
2199 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2200 ConstantInt *CaseVal =
2201 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2202 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2203 if (CaseVal == 0 || DestBB == 0) {
2205 return Error("Invalid SWITCH record!");
2207 SI->addCase(CaseVal, DestBB);
2212 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2213 if (Record.size() < 2)
2214 return Error("Invalid INDIRECTBR record");
2215 const Type *OpTy = getTypeByID(Record[0]);
2216 Value *Address = getFnValueByID(Record[1], OpTy);
2217 if (OpTy == 0 || Address == 0)
2218 return Error("Invalid INDIRECTBR record");
2219 unsigned NumDests = Record.size()-2;
2220 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2221 InstructionList.push_back(IBI);
2222 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2223 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2224 IBI->addDestination(DestBB);
2227 return Error("Invalid INDIRECTBR record!");
2234 case bitc::FUNC_CODE_INST_INVOKE: {
2235 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2236 if (Record.size() < 4) return Error("Invalid INVOKE record");
2237 AttrListPtr PAL = getAttributes(Record[0]);
2238 unsigned CCInfo = Record[1];
2239 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2240 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2244 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2245 return Error("Invalid INVOKE record");
2247 const PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2248 const FunctionType *FTy = !CalleeTy ? 0 :
2249 dyn_cast<FunctionType>(CalleeTy->getElementType());
2251 // Check that the right number of fixed parameters are here.
2252 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2253 Record.size() < OpNum+FTy->getNumParams())
2254 return Error("Invalid INVOKE record");
2256 SmallVector<Value*, 16> Ops;
2257 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2258 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2259 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2262 if (!FTy->isVarArg()) {
2263 if (Record.size() != OpNum)
2264 return Error("Invalid INVOKE record");
2266 // Read type/value pairs for varargs params.
2267 while (OpNum != Record.size()) {
2269 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2270 return Error("Invalid INVOKE record");
2275 I = InvokeInst::Create(Callee, NormalBB, UnwindBB,
2276 Ops.begin(), Ops.end());
2277 InstructionList.push_back(I);
2278 cast<InvokeInst>(I)->setCallingConv(
2279 static_cast<CallingConv::ID>(CCInfo));
2280 cast<InvokeInst>(I)->setAttributes(PAL);
2283 case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
2284 I = new UnwindInst(Context);
2285 InstructionList.push_back(I);
2287 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2288 I = new UnreachableInst(Context);
2289 InstructionList.push_back(I);
2291 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2292 if (Record.size() < 1 || ((Record.size()-1)&1))
2293 return Error("Invalid PHI record");
2294 const Type *Ty = getTypeByID(Record[0]);
2295 if (!Ty) return Error("Invalid PHI record");
2297 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2298 InstructionList.push_back(PN);
2300 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2301 Value *V = getFnValueByID(Record[1+i], Ty);
2302 BasicBlock *BB = getBasicBlock(Record[2+i]);
2303 if (!V || !BB) return Error("Invalid PHI record");
2304 PN->addIncoming(V, BB);
2310 case bitc::FUNC_CODE_INST_MALLOC: { // MALLOC: [instty, op, align]
2311 // Autoupgrade malloc instruction to malloc call.
2312 // FIXME: Remove in LLVM 3.0.
2313 if (Record.size() < 3)
2314 return Error("Invalid MALLOC record");
2315 const PointerType *Ty =
2316 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2317 Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
2318 if (!Ty || !Size) return Error("Invalid MALLOC record");
2319 if (!CurBB) return Error("Invalid malloc instruction with no BB");
2320 const Type *Int32Ty = IntegerType::getInt32Ty(CurBB->getContext());
2321 Constant *AllocSize = ConstantExpr::getSizeOf(Ty->getElementType());
2322 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, Int32Ty);
2323 I = CallInst::CreateMalloc(CurBB, Int32Ty, Ty->getElementType(),
2324 AllocSize, Size, NULL);
2325 InstructionList.push_back(I);
2328 case bitc::FUNC_CODE_INST_FREE: { // FREE: [op, opty]
2331 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2332 OpNum != Record.size())
2333 return Error("Invalid FREE record");
2334 if (!CurBB) return Error("Invalid free instruction with no BB");
2335 I = CallInst::CreateFree(Op, CurBB);
2336 InstructionList.push_back(I);
2339 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2340 // For backward compatibility, tolerate a lack of an opty, and use i32.
2341 // Remove this in LLVM 3.0.
2342 if (Record.size() < 3 || Record.size() > 4)
2343 return Error("Invalid ALLOCA record");
2345 const PointerType *Ty =
2346 dyn_cast_or_null<PointerType>(getTypeByID(Record[OpNum++]));
2347 const Type *OpTy = Record.size() == 4 ? getTypeByID(Record[OpNum++]) :
2348 Type::getInt32Ty(Context);
2349 Value *Size = getFnValueByID(Record[OpNum++], OpTy);
2350 unsigned Align = Record[OpNum++];
2351 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2352 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2353 InstructionList.push_back(I);
2356 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2359 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2360 OpNum+2 != Record.size())
2361 return Error("Invalid LOAD record");
2363 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2364 InstructionList.push_back(I);
2367 case bitc::FUNC_CODE_INST_STORE2: { // STORE2:[ptrty, ptr, val, align, vol]
2370 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2371 getValue(Record, OpNum,
2372 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
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 case bitc::FUNC_CODE_INST_STORE: { // STORE:[val, valty, ptr, align, vol]
2381 // FIXME: Legacy form of store instruction. Should be removed in LLVM 3.0.
2384 if (getValueTypePair(Record, OpNum, NextValueNo, Val) ||
2385 getValue(Record, OpNum,
2386 PointerType::getUnqual(Val->getType()), Ptr)||
2387 OpNum+2 != Record.size())
2388 return Error("Invalid STORE record");
2390 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2391 InstructionList.push_back(I);
2394 // FIXME: Remove this in LLVM 3.0.
2395 case bitc::FUNC_CODE_INST_CALL:
2396 LLVM2_7MetadataDetected = true;
2397 case bitc::FUNC_CODE_INST_CALL2: {
2398 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2399 if (Record.size() < 3)
2400 return Error("Invalid CALL record");
2402 AttrListPtr PAL = getAttributes(Record[0]);
2403 unsigned CCInfo = Record[1];
2407 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2408 return Error("Invalid CALL record");
2410 const PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2411 const FunctionType *FTy = 0;
2412 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2413 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2414 return Error("Invalid CALL record");
2416 SmallVector<Value*, 16> Args;
2417 // Read the fixed params.
2418 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2419 if (FTy->getParamType(i)->getTypeID()==Type::LabelTyID)
2420 Args.push_back(getBasicBlock(Record[OpNum]));
2422 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2423 if (Args.back() == 0) return Error("Invalid CALL record");
2426 // Read type/value pairs for varargs params.
2427 if (!FTy->isVarArg()) {
2428 if (OpNum != Record.size())
2429 return Error("Invalid CALL record");
2431 while (OpNum != Record.size()) {
2433 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2434 return Error("Invalid CALL record");
2439 I = CallInst::Create(Callee, Args.begin(), Args.end());
2440 InstructionList.push_back(I);
2441 cast<CallInst>(I)->setCallingConv(
2442 static_cast<CallingConv::ID>(CCInfo>>1));
2443 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2444 cast<CallInst>(I)->setAttributes(PAL);
2447 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2448 if (Record.size() < 3)
2449 return Error("Invalid VAARG record");
2450 const Type *OpTy = getTypeByID(Record[0]);
2451 Value *Op = getFnValueByID(Record[1], OpTy);
2452 const Type *ResTy = getTypeByID(Record[2]);
2453 if (!OpTy || !Op || !ResTy)
2454 return Error("Invalid VAARG record");
2455 I = new VAArgInst(Op, ResTy);
2456 InstructionList.push_back(I);
2461 // Add instruction to end of current BB. If there is no current BB, reject
2465 return Error("Invalid instruction with no BB");
2467 CurBB->getInstList().push_back(I);
2469 // If this was a terminator instruction, move to the next block.
2470 if (isa<TerminatorInst>(I)) {
2472 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2475 // Non-void values get registered in the value table for future use.
2476 if (I && !I->getType()->isVoidTy())
2477 ValueList.AssignValue(I, NextValueNo++);
2480 // Check the function list for unresolved values.
2481 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2482 if (A->getParent() == 0) {
2483 // We found at least one unresolved value. Nuke them all to avoid leaks.
2484 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2485 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2486 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2490 return Error("Never resolved value found in function!");
2494 // FIXME: Check for unresolved forward-declared metadata references
2495 // and clean up leaks.
2497 // See if anything took the address of blocks in this function. If so,
2498 // resolve them now.
2499 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2500 BlockAddrFwdRefs.find(F);
2501 if (BAFRI != BlockAddrFwdRefs.end()) {
2502 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2503 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2504 unsigned BlockIdx = RefList[i].first;
2505 if (BlockIdx >= FunctionBBs.size())
2506 return Error("Invalid blockaddress block #");
2508 GlobalVariable *FwdRef = RefList[i].second;
2509 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2510 FwdRef->eraseFromParent();
2513 BlockAddrFwdRefs.erase(BAFRI);
2516 // FIXME: Remove this in LLVM 3.0.
2517 unsigned NewMDValueListSize = MDValueList.size();
2519 // Trim the value list down to the size it was before we parsed this function.
2520 ValueList.shrinkTo(ModuleValueListSize);
2521 MDValueList.shrinkTo(ModuleMDValueListSize);
2523 // Backwards compatibility hack: Function-local metadata numbers
2524 // were previously not reset between functions. This is now fixed,
2525 // however we still need to understand the old numbering in order
2526 // to be able to read old bitcode files.
2527 // FIXME: Remove this in LLVM 3.0.
2528 if (LLVM2_7MetadataDetected)
2529 MDValueList.resize(NewMDValueListSize);
2531 std::vector<BasicBlock*>().swap(FunctionBBs);
2536 //===----------------------------------------------------------------------===//
2537 // GVMaterializer implementation
2538 //===----------------------------------------------------------------------===//
2541 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2542 if (const Function *F = dyn_cast<Function>(GV)) {
2543 return F->isDeclaration() &&
2544 DeferredFunctionInfo.count(const_cast<Function*>(F));
2549 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2550 Function *F = dyn_cast<Function>(GV);
2551 // If it's not a function or is already material, ignore the request.
2552 if (!F || !F->isMaterializable()) return false;
2554 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2555 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2557 // Move the bit stream to the saved position of the deferred function body.
2558 Stream.JumpToBit(DFII->second);
2560 if (ParseFunctionBody(F)) {
2561 if (ErrInfo) *ErrInfo = ErrorString;
2565 // Upgrade any old intrinsic calls in the function.
2566 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2567 E = UpgradedIntrinsics.end(); I != E; ++I) {
2568 if (I->first != I->second) {
2569 for (Value::use_iterator UI = I->first->use_begin(),
2570 UE = I->first->use_end(); UI != UE; ) {
2571 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2572 UpgradeIntrinsicCall(CI, I->second);
2580 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2581 const Function *F = dyn_cast<Function>(GV);
2582 if (!F || F->isDeclaration())
2584 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2587 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2588 Function *F = dyn_cast<Function>(GV);
2589 // If this function isn't dematerializable, this is a noop.
2590 if (!F || !isDematerializable(F))
2593 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2595 // Just forget the function body, we can remat it later.
2600 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2601 assert(M == TheModule &&
2602 "Can only Materialize the Module this BitcodeReader is attached to.");
2603 // Iterate over the module, deserializing any functions that are still on
2605 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2607 if (F->isMaterializable() &&
2608 Materialize(F, ErrInfo))
2611 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2612 // delete the old functions to clean up. We can't do this unless the entire
2613 // module is materialized because there could always be another function body
2614 // with calls to the old function.
2615 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2616 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2617 if (I->first != I->second) {
2618 for (Value::use_iterator UI = I->first->use_begin(),
2619 UE = I->first->use_end(); UI != UE; ) {
2620 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2621 UpgradeIntrinsicCall(CI, I->second);
2623 if (!I->first->use_empty())
2624 I->first->replaceAllUsesWith(I->second);
2625 I->first->eraseFromParent();
2628 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2630 // Check debug info intrinsics.
2631 CheckDebugInfoIntrinsics(TheModule);
2637 //===----------------------------------------------------------------------===//
2638 // External interface
2639 //===----------------------------------------------------------------------===//
2641 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2643 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2644 LLVMContext& Context,
2645 std::string *ErrMsg) {
2646 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2647 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2648 M->setMaterializer(R);
2649 if (R->ParseBitcodeInto(M)) {
2651 *ErrMsg = R->getErrorString();
2653 delete M; // Also deletes R.
2656 // Have the BitcodeReader dtor delete 'Buffer'.
2657 R->setBufferOwned(true);
2661 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2662 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2663 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2664 std::string *ErrMsg){
2665 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2668 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2669 // there was an error.
2670 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2672 // Read in the entire module, and destroy the BitcodeReader.
2673 if (M->MaterializeAllPermanently(ErrMsg)) {
2681 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
2682 LLVMContext& Context,
2683 std::string *ErrMsg) {
2684 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2685 // Don't let the BitcodeReader dtor delete 'Buffer'.
2686 R->setBufferOwned(false);
2688 std::string Triple("");
2689 if (R->ParseTriple(Triple))
2691 *ErrMsg = R->getErrorString();