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[0],
308 UserC->replaceAllUsesWith(NewC);
309 UserC->destroyConstant();
313 // Update all ValueHandles, they should be the only users at this point.
314 Placeholder->replaceAllUsesWith(RealVal);
319 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
328 WeakVH &OldV = MDValuePtrs[Idx];
334 // If there was a forward reference to this value, replace it.
335 MDNode *PrevVal = cast<MDNode>(OldV);
336 OldV->replaceAllUsesWith(V);
337 MDNode::deleteTemporary(PrevVal);
338 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
340 MDValuePtrs[Idx] = V;
343 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
347 if (Value *V = MDValuePtrs[Idx]) {
348 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
352 // Create and return a placeholder, which will later be RAUW'd.
353 Value *V = MDNode::getTemporary(Context, 0, 0);
354 MDValuePtrs[Idx] = V;
358 const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
359 // If the TypeID is in range, return it.
360 if (ID < TypeList.size())
361 return TypeList[ID].get();
362 if (!isTypeTable) return 0;
364 // The type table allows forward references. Push as many Opaque types as
365 // needed to get up to ID.
366 while (TypeList.size() <= ID)
367 TypeList.push_back(OpaqueType::get(Context));
368 return TypeList.back().get();
371 //===----------------------------------------------------------------------===//
372 // Functions for parsing blocks from the bitcode file
373 //===----------------------------------------------------------------------===//
375 bool BitcodeReader::ParseAttributeBlock() {
376 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
377 return Error("Malformed block record");
379 if (!MAttributes.empty())
380 return Error("Multiple PARAMATTR blocks found!");
382 SmallVector<uint64_t, 64> Record;
384 SmallVector<AttributeWithIndex, 8> Attrs;
386 // Read all the records.
388 unsigned Code = Stream.ReadCode();
389 if (Code == bitc::END_BLOCK) {
390 if (Stream.ReadBlockEnd())
391 return Error("Error at end of PARAMATTR block");
395 if (Code == bitc::ENTER_SUBBLOCK) {
396 // No known subblocks, always skip them.
397 Stream.ReadSubBlockID();
398 if (Stream.SkipBlock())
399 return Error("Malformed block record");
403 if (Code == bitc::DEFINE_ABBREV) {
404 Stream.ReadAbbrevRecord();
410 switch (Stream.ReadRecord(Code, Record)) {
411 default: // Default behavior: ignore.
413 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
414 if (Record.size() & 1)
415 return Error("Invalid ENTRY record");
417 // FIXME : Remove this autoupgrade code in LLVM 3.0.
418 // If Function attributes are using index 0 then transfer them
419 // to index ~0. Index 0 is used for return value attributes but used to be
420 // used for function attributes.
421 Attributes RetAttribute = Attribute::None;
422 Attributes FnAttribute = Attribute::None;
423 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
424 // FIXME: remove in LLVM 3.0
425 // The alignment is stored as a 16-bit raw value from bits 31--16.
426 // We shift the bits above 31 down by 11 bits.
428 unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
429 if (Alignment && !isPowerOf2_32(Alignment))
430 return Error("Alignment is not a power of two.");
432 Attributes ReconstitutedAttr = Record[i+1] & 0xffff;
434 ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
435 ReconstitutedAttr |= (Record[i+1] & (0xffffull << 32)) >> 11;
436 Record[i+1] = ReconstitutedAttr;
439 RetAttribute = Record[i+1];
440 else if (Record[i] == ~0U)
441 FnAttribute = Record[i+1];
444 unsigned OldRetAttrs = (Attribute::NoUnwind|Attribute::NoReturn|
445 Attribute::ReadOnly|Attribute::ReadNone);
447 if (FnAttribute == Attribute::None && RetAttribute != Attribute::None &&
448 (RetAttribute & OldRetAttrs) != 0) {
449 if (FnAttribute == Attribute::None) { // add a slot so they get added.
450 Record.push_back(~0U);
454 FnAttribute |= RetAttribute & OldRetAttrs;
455 RetAttribute &= ~OldRetAttrs;
458 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
459 if (Record[i] == 0) {
460 if (RetAttribute != Attribute::None)
461 Attrs.push_back(AttributeWithIndex::get(0, RetAttribute));
462 } else if (Record[i] == ~0U) {
463 if (FnAttribute != Attribute::None)
464 Attrs.push_back(AttributeWithIndex::get(~0U, FnAttribute));
465 } else if (Record[i+1] != Attribute::None)
466 Attrs.push_back(AttributeWithIndex::get(Record[i], Record[i+1]));
469 MAttributes.push_back(AttrListPtr::get(Attrs.begin(), Attrs.end()));
478 bool BitcodeReader::ParseTypeTable() {
479 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID))
480 return Error("Malformed block record");
482 if (!TypeList.empty())
483 return Error("Multiple TYPE_BLOCKs found!");
485 SmallVector<uint64_t, 64> Record;
486 unsigned NumRecords = 0;
488 // Read all the records for this type table.
490 unsigned Code = Stream.ReadCode();
491 if (Code == bitc::END_BLOCK) {
492 if (NumRecords != TypeList.size())
493 return Error("Invalid type forward reference in TYPE_BLOCK");
494 if (Stream.ReadBlockEnd())
495 return Error("Error at end of type table block");
499 if (Code == bitc::ENTER_SUBBLOCK) {
500 // No known subblocks, always skip them.
501 Stream.ReadSubBlockID();
502 if (Stream.SkipBlock())
503 return Error("Malformed block record");
507 if (Code == bitc::DEFINE_ABBREV) {
508 Stream.ReadAbbrevRecord();
514 const Type *ResultTy = 0;
515 switch (Stream.ReadRecord(Code, Record)) {
516 default: // Default behavior: unknown type.
519 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
520 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
521 // type list. This allows us to reserve space.
522 if (Record.size() < 1)
523 return Error("Invalid TYPE_CODE_NUMENTRY record");
524 TypeList.reserve(Record[0]);
526 case bitc::TYPE_CODE_VOID: // VOID
527 ResultTy = Type::getVoidTy(Context);
529 case bitc::TYPE_CODE_FLOAT: // FLOAT
530 ResultTy = Type::getFloatTy(Context);
532 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
533 ResultTy = Type::getDoubleTy(Context);
535 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
536 ResultTy = Type::getX86_FP80Ty(Context);
538 case bitc::TYPE_CODE_FP128: // FP128
539 ResultTy = Type::getFP128Ty(Context);
541 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
542 ResultTy = Type::getPPC_FP128Ty(Context);
544 case bitc::TYPE_CODE_LABEL: // LABEL
545 ResultTy = Type::getLabelTy(Context);
547 case bitc::TYPE_CODE_OPAQUE: // OPAQUE
550 case bitc::TYPE_CODE_METADATA: // METADATA
551 ResultTy = Type::getMetadataTy(Context);
553 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
554 ResultTy = Type::getX86_MMXTy(Context);
556 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
557 if (Record.size() < 1)
558 return Error("Invalid Integer type record");
560 ResultTy = IntegerType::get(Context, Record[0]);
562 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
563 // [pointee type, address space]
564 if (Record.size() < 1)
565 return Error("Invalid POINTER type record");
566 unsigned AddressSpace = 0;
567 if (Record.size() == 2)
568 AddressSpace = Record[1];
569 ResultTy = PointerType::get(getTypeByID(Record[0], true),
573 case bitc::TYPE_CODE_FUNCTION: {
574 // FIXME: attrid is dead, remove it in LLVM 3.0
575 // FUNCTION: [vararg, attrid, retty, paramty x N]
576 if (Record.size() < 3)
577 return Error("Invalid FUNCTION type record");
578 std::vector<const Type*> ArgTys;
579 for (unsigned i = 3, e = Record.size(); i != e; ++i)
580 ArgTys.push_back(getTypeByID(Record[i], true));
582 ResultTy = FunctionType::get(getTypeByID(Record[2], true), ArgTys,
586 case bitc::TYPE_CODE_STRUCT: { // STRUCT: [ispacked, eltty x N]
587 if (Record.size() < 1)
588 return Error("Invalid STRUCT type record");
589 std::vector<const Type*> EltTys;
590 for (unsigned i = 1, e = Record.size(); i != e; ++i)
591 EltTys.push_back(getTypeByID(Record[i], true));
592 ResultTy = StructType::get(Context, EltTys, Record[0]);
595 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
596 if (Record.size() < 2)
597 return Error("Invalid ARRAY type record");
598 ResultTy = ArrayType::get(getTypeByID(Record[1], true), Record[0]);
600 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
601 if (Record.size() < 2)
602 return Error("Invalid VECTOR type record");
603 ResultTy = VectorType::get(getTypeByID(Record[1], true), Record[0]);
607 if (NumRecords == TypeList.size()) {
608 // If this is a new type slot, just append it.
609 TypeList.push_back(ResultTy ? ResultTy : OpaqueType::get(Context));
611 } else if (ResultTy == 0) {
612 // Otherwise, this was forward referenced, so an opaque type was created,
613 // but the result type is actually just an opaque. Leave the one we
614 // created previously.
617 // Otherwise, this was forward referenced, so an opaque type was created.
618 // Resolve the opaque type to the real type now.
619 assert(NumRecords < TypeList.size() && "Typelist imbalance");
620 const OpaqueType *OldTy = cast<OpaqueType>(TypeList[NumRecords++].get());
622 // Don't directly push the new type on the Tab. Instead we want to replace
623 // the opaque type we previously inserted with the new concrete value. The
624 // refinement from the abstract (opaque) type to the new type causes all
625 // uses of the abstract type to use the concrete type (NewTy). This will
626 // also cause the opaque type to be deleted.
627 const_cast<OpaqueType*>(OldTy)->refineAbstractTypeTo(ResultTy);
629 // This should have replaced the old opaque type with the new type in the
630 // value table... or with a preexisting type that was already in the
631 // system. Let's just make sure it did.
632 assert(TypeList[NumRecords-1].get() != OldTy &&
633 "refineAbstractType didn't work!");
639 bool BitcodeReader::ParseTypeSymbolTable() {
640 if (Stream.EnterSubBlock(bitc::TYPE_SYMTAB_BLOCK_ID))
641 return Error("Malformed block record");
643 SmallVector<uint64_t, 64> Record;
645 // Read all the records for this type table.
646 std::string TypeName;
648 unsigned Code = Stream.ReadCode();
649 if (Code == bitc::END_BLOCK) {
650 if (Stream.ReadBlockEnd())
651 return Error("Error at end of type symbol table block");
655 if (Code == bitc::ENTER_SUBBLOCK) {
656 // No known subblocks, always skip them.
657 Stream.ReadSubBlockID();
658 if (Stream.SkipBlock())
659 return Error("Malformed block record");
663 if (Code == bitc::DEFINE_ABBREV) {
664 Stream.ReadAbbrevRecord();
670 switch (Stream.ReadRecord(Code, Record)) {
671 default: // Default behavior: unknown type.
673 case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namechar x N]
674 if (ConvertToString(Record, 1, TypeName))
675 return Error("Invalid TST_ENTRY record");
676 unsigned TypeID = Record[0];
677 if (TypeID >= TypeList.size())
678 return Error("Invalid Type ID in TST_ENTRY record");
680 TheModule->addTypeName(TypeName, TypeList[TypeID].get());
687 bool BitcodeReader::ParseValueSymbolTable() {
688 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
689 return Error("Malformed block record");
691 SmallVector<uint64_t, 64> Record;
693 // Read all the records for this value table.
694 SmallString<128> ValueName;
696 unsigned Code = Stream.ReadCode();
697 if (Code == bitc::END_BLOCK) {
698 if (Stream.ReadBlockEnd())
699 return Error("Error at end of value symbol table block");
702 if (Code == bitc::ENTER_SUBBLOCK) {
703 // No known subblocks, always skip them.
704 Stream.ReadSubBlockID();
705 if (Stream.SkipBlock())
706 return Error("Malformed block record");
710 if (Code == bitc::DEFINE_ABBREV) {
711 Stream.ReadAbbrevRecord();
717 switch (Stream.ReadRecord(Code, Record)) {
718 default: // Default behavior: unknown type.
720 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
721 if (ConvertToString(Record, 1, ValueName))
722 return Error("Invalid VST_ENTRY record");
723 unsigned ValueID = Record[0];
724 if (ValueID >= ValueList.size())
725 return Error("Invalid Value ID in VST_ENTRY record");
726 Value *V = ValueList[ValueID];
728 V->setName(StringRef(ValueName.data(), ValueName.size()));
732 case bitc::VST_CODE_BBENTRY: {
733 if (ConvertToString(Record, 1, ValueName))
734 return Error("Invalid VST_BBENTRY record");
735 BasicBlock *BB = getBasicBlock(Record[0]);
737 return Error("Invalid BB ID in VST_BBENTRY record");
739 BB->setName(StringRef(ValueName.data(), ValueName.size()));
747 bool BitcodeReader::ParseMetadata() {
748 unsigned NextMDValueNo = MDValueList.size();
750 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
751 return Error("Malformed block record");
753 SmallVector<uint64_t, 64> Record;
755 // Read all the records.
757 unsigned Code = Stream.ReadCode();
758 if (Code == bitc::END_BLOCK) {
759 if (Stream.ReadBlockEnd())
760 return Error("Error at end of PARAMATTR block");
764 if (Code == bitc::ENTER_SUBBLOCK) {
765 // No known subblocks, always skip them.
766 Stream.ReadSubBlockID();
767 if (Stream.SkipBlock())
768 return Error("Malformed block record");
772 if (Code == bitc::DEFINE_ABBREV) {
773 Stream.ReadAbbrevRecord();
777 bool IsFunctionLocal = false;
780 Code = Stream.ReadRecord(Code, Record);
782 default: // Default behavior: ignore.
784 case bitc::METADATA_NAME: {
785 // Read named of the named metadata.
786 unsigned NameLength = Record.size();
788 Name.resize(NameLength);
789 for (unsigned i = 0; i != NameLength; ++i)
792 Code = Stream.ReadCode();
794 // METADATA_NAME is always followed by METADATA_NAMED_NODE2.
795 // Or METADATA_NAMED_NODE in LLVM 2.7. FIXME: Remove this in LLVM 3.0.
796 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
797 if (NextBitCode == bitc::METADATA_NAMED_NODE) {
798 LLVM2_7MetadataDetected = true;
799 } else if (NextBitCode != bitc::METADATA_NAMED_NODE2)
800 assert ( 0 && "Invalid Named Metadata record");
802 // Read named metadata elements.
803 unsigned Size = Record.size();
804 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
805 for (unsigned i = 0; i != Size; ++i) {
806 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
808 return Error("Malformed metadata record");
811 // Backwards compatibility hack: NamedMDValues used to be Values,
812 // and they got their own slots in the value numbering. They are no
813 // longer Values, however we still need to account for them in the
814 // numbering in order to be able to read old bitcode files.
815 // FIXME: Remove this in LLVM 3.0.
816 if (LLVM2_7MetadataDetected)
817 MDValueList.AssignValue(0, NextMDValueNo++);
820 case bitc::METADATA_FN_NODE: // FIXME: Remove in LLVM 3.0.
821 case bitc::METADATA_FN_NODE2:
822 IsFunctionLocal = true;
824 case bitc::METADATA_NODE: // FIXME: Remove in LLVM 3.0.
825 case bitc::METADATA_NODE2: {
827 // Detect 2.7-era metadata.
828 // FIXME: Remove in LLVM 3.0.
829 if (Code == bitc::METADATA_FN_NODE || Code == bitc::METADATA_NODE)
830 LLVM2_7MetadataDetected = true;
832 if (Record.size() % 2 == 1)
833 return Error("Invalid METADATA_NODE2 record");
835 unsigned Size = Record.size();
836 SmallVector<Value*, 8> Elts;
837 for (unsigned i = 0; i != Size; i += 2) {
838 const Type *Ty = getTypeByID(Record[i]);
839 if (!Ty) return Error("Invalid METADATA_NODE2 record");
840 if (Ty->isMetadataTy())
841 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
842 else if (!Ty->isVoidTy())
843 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
845 Elts.push_back(NULL);
847 Value *V = MDNode::getWhenValsUnresolved(Context,
848 Elts.data(), Elts.size(),
850 IsFunctionLocal = false;
851 MDValueList.AssignValue(V, NextMDValueNo++);
854 case bitc::METADATA_STRING: {
855 unsigned MDStringLength = Record.size();
856 SmallString<8> String;
857 String.resize(MDStringLength);
858 for (unsigned i = 0; i != MDStringLength; ++i)
859 String[i] = Record[i];
860 Value *V = MDString::get(Context,
861 StringRef(String.data(), String.size()));
862 MDValueList.AssignValue(V, NextMDValueNo++);
865 case bitc::METADATA_KIND: {
866 unsigned RecordLength = Record.size();
867 if (Record.empty() || RecordLength < 2)
868 return Error("Invalid METADATA_KIND record");
870 Name.resize(RecordLength-1);
871 unsigned Kind = Record[0];
872 for (unsigned i = 1; i != RecordLength; ++i)
873 Name[i-1] = Record[i];
875 unsigned NewKind = TheModule->getMDKindID(Name.str());
876 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
877 return Error("Conflicting METADATA_KIND records");
884 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
885 /// the LSB for dense VBR encoding.
886 static uint64_t DecodeSignRotatedValue(uint64_t V) {
891 // There is no such thing as -0 with integers. "-0" really means MININT.
895 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
896 /// values and aliases that we can.
897 bool BitcodeReader::ResolveGlobalAndAliasInits() {
898 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
899 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
901 GlobalInitWorklist.swap(GlobalInits);
902 AliasInitWorklist.swap(AliasInits);
904 while (!GlobalInitWorklist.empty()) {
905 unsigned ValID = GlobalInitWorklist.back().second;
906 if (ValID >= ValueList.size()) {
907 // Not ready to resolve this yet, it requires something later in the file.
908 GlobalInits.push_back(GlobalInitWorklist.back());
910 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
911 GlobalInitWorklist.back().first->setInitializer(C);
913 return Error("Global variable initializer is not a constant!");
915 GlobalInitWorklist.pop_back();
918 while (!AliasInitWorklist.empty()) {
919 unsigned ValID = AliasInitWorklist.back().second;
920 if (ValID >= ValueList.size()) {
921 AliasInits.push_back(AliasInitWorklist.back());
923 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
924 AliasInitWorklist.back().first->setAliasee(C);
926 return Error("Alias initializer is not a constant!");
928 AliasInitWorklist.pop_back();
933 bool BitcodeReader::ParseConstants() {
934 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
935 return Error("Malformed block record");
937 SmallVector<uint64_t, 64> Record;
939 // Read all the records for this value table.
940 const Type *CurTy = Type::getInt32Ty(Context);
941 unsigned NextCstNo = ValueList.size();
943 unsigned Code = Stream.ReadCode();
944 if (Code == bitc::END_BLOCK)
947 if (Code == bitc::ENTER_SUBBLOCK) {
948 // No known subblocks, always skip them.
949 Stream.ReadSubBlockID();
950 if (Stream.SkipBlock())
951 return Error("Malformed block record");
955 if (Code == bitc::DEFINE_ABBREV) {
956 Stream.ReadAbbrevRecord();
963 unsigned BitCode = Stream.ReadRecord(Code, Record);
965 default: // Default behavior: unknown constant
966 case bitc::CST_CODE_UNDEF: // UNDEF
967 V = UndefValue::get(CurTy);
969 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
971 return Error("Malformed CST_SETTYPE record");
972 if (Record[0] >= TypeList.size())
973 return Error("Invalid Type ID in CST_SETTYPE record");
974 CurTy = TypeList[Record[0]];
975 continue; // Skip the ValueList manipulation.
976 case bitc::CST_CODE_NULL: // NULL
977 V = Constant::getNullValue(CurTy);
979 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
980 if (!CurTy->isIntegerTy() || Record.empty())
981 return Error("Invalid CST_INTEGER record");
982 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
984 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
985 if (!CurTy->isIntegerTy() || Record.empty())
986 return Error("Invalid WIDE_INTEGER record");
988 unsigned NumWords = Record.size();
989 SmallVector<uint64_t, 8> Words;
990 Words.resize(NumWords);
991 for (unsigned i = 0; i != NumWords; ++i)
992 Words[i] = DecodeSignRotatedValue(Record[i]);
993 V = ConstantInt::get(Context,
994 APInt(cast<IntegerType>(CurTy)->getBitWidth(),
995 NumWords, &Words[0]));
998 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1000 return Error("Invalid FLOAT record");
1001 if (CurTy->isFloatTy())
1002 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1003 else if (CurTy->isDoubleTy())
1004 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1005 else if (CurTy->isX86_FP80Ty()) {
1006 // Bits are not stored the same way as a normal i80 APInt, compensate.
1007 uint64_t Rearrange[2];
1008 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1009 Rearrange[1] = Record[0] >> 48;
1010 V = ConstantFP::get(Context, APFloat(APInt(80, 2, Rearrange)));
1011 } else if (CurTy->isFP128Ty())
1012 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0]), true));
1013 else if (CurTy->isPPC_FP128Ty())
1014 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0])));
1016 V = UndefValue::get(CurTy);
1020 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1022 return Error("Invalid CST_AGGREGATE record");
1024 unsigned Size = Record.size();
1025 std::vector<Constant*> Elts;
1027 if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
1028 for (unsigned i = 0; i != Size; ++i)
1029 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1030 STy->getElementType(i)));
1031 V = ConstantStruct::get(STy, Elts);
1032 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1033 const Type *EltTy = ATy->getElementType();
1034 for (unsigned i = 0; i != Size; ++i)
1035 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1036 V = ConstantArray::get(ATy, Elts);
1037 } else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1038 const Type *EltTy = VTy->getElementType();
1039 for (unsigned i = 0; i != Size; ++i)
1040 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1041 V = ConstantVector::get(Elts);
1043 V = UndefValue::get(CurTy);
1047 case bitc::CST_CODE_STRING: { // STRING: [values]
1049 return Error("Invalid CST_AGGREGATE record");
1051 const ArrayType *ATy = cast<ArrayType>(CurTy);
1052 const Type *EltTy = ATy->getElementType();
1054 unsigned Size = Record.size();
1055 std::vector<Constant*> Elts;
1056 for (unsigned i = 0; i != Size; ++i)
1057 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1058 V = ConstantArray::get(ATy, Elts);
1061 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1063 return Error("Invalid CST_AGGREGATE record");
1065 const ArrayType *ATy = cast<ArrayType>(CurTy);
1066 const Type *EltTy = ATy->getElementType();
1068 unsigned Size = Record.size();
1069 std::vector<Constant*> Elts;
1070 for (unsigned i = 0; i != Size; ++i)
1071 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1072 Elts.push_back(Constant::getNullValue(EltTy));
1073 V = ConstantArray::get(ATy, Elts);
1076 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1077 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1078 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1080 V = UndefValue::get(CurTy); // Unknown binop.
1082 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1083 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1085 if (Record.size() >= 4) {
1086 if (Opc == Instruction::Add ||
1087 Opc == Instruction::Sub ||
1088 Opc == Instruction::Mul ||
1089 Opc == Instruction::Shl) {
1090 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1091 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1092 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1093 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1094 } else if (Opc == Instruction::SDiv ||
1095 Opc == Instruction::UDiv ||
1096 Opc == Instruction::LShr ||
1097 Opc == Instruction::AShr) {
1098 if (Record[3] & (1 << bitc::PEO_EXACT))
1099 Flags |= SDivOperator::IsExact;
1102 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1106 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1107 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1108 int Opc = GetDecodedCastOpcode(Record[0]);
1110 V = UndefValue::get(CurTy); // Unknown cast.
1112 const Type *OpTy = getTypeByID(Record[1]);
1113 if (!OpTy) return Error("Invalid CE_CAST record");
1114 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1115 V = ConstantExpr::getCast(Opc, Op, CurTy);
1119 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1120 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1121 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1122 SmallVector<Constant*, 16> Elts;
1123 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1124 const Type *ElTy = getTypeByID(Record[i]);
1125 if (!ElTy) return Error("Invalid CE_GEP record");
1126 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1128 if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
1129 V = ConstantExpr::getInBoundsGetElementPtr(Elts[0], &Elts[1],
1132 V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1],
1136 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1137 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1138 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1139 Type::getInt1Ty(Context)),
1140 ValueList.getConstantFwdRef(Record[1],CurTy),
1141 ValueList.getConstantFwdRef(Record[2],CurTy));
1143 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1144 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1145 const VectorType *OpTy =
1146 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1147 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1148 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1149 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1150 V = ConstantExpr::getExtractElement(Op0, Op1);
1153 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1154 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1155 if (Record.size() < 3 || OpTy == 0)
1156 return Error("Invalid CE_INSERTELT record");
1157 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1158 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1159 OpTy->getElementType());
1160 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1161 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1164 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1165 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1166 if (Record.size() < 3 || OpTy == 0)
1167 return Error("Invalid CE_SHUFFLEVEC record");
1168 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1169 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1170 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1171 OpTy->getNumElements());
1172 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1173 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1176 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1177 const VectorType *RTy = dyn_cast<VectorType>(CurTy);
1178 const VectorType *OpTy =
1179 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1180 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1181 return Error("Invalid CE_SHUFVEC_EX record");
1182 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1183 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1184 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1185 RTy->getNumElements());
1186 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1187 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1190 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1191 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1192 const Type *OpTy = getTypeByID(Record[0]);
1193 if (OpTy == 0) return Error("Invalid CE_CMP record");
1194 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1195 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1197 if (OpTy->isFPOrFPVectorTy())
1198 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1200 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1203 case bitc::CST_CODE_INLINEASM: {
1204 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1205 std::string AsmStr, ConstrStr;
1206 bool HasSideEffects = Record[0] & 1;
1207 bool IsAlignStack = Record[0] >> 1;
1208 unsigned AsmStrSize = Record[1];
1209 if (2+AsmStrSize >= Record.size())
1210 return Error("Invalid INLINEASM record");
1211 unsigned ConstStrSize = Record[2+AsmStrSize];
1212 if (3+AsmStrSize+ConstStrSize > Record.size())
1213 return Error("Invalid INLINEASM record");
1215 for (unsigned i = 0; i != AsmStrSize; ++i)
1216 AsmStr += (char)Record[2+i];
1217 for (unsigned i = 0; i != ConstStrSize; ++i)
1218 ConstrStr += (char)Record[3+AsmStrSize+i];
1219 const PointerType *PTy = cast<PointerType>(CurTy);
1220 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1221 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1224 case bitc::CST_CODE_BLOCKADDRESS:{
1225 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1226 const Type *FnTy = getTypeByID(Record[0]);
1227 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1229 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1230 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1232 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1233 Type::getInt8Ty(Context),
1234 false, GlobalValue::InternalLinkage,
1236 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1242 ValueList.AssignValue(V, NextCstNo);
1246 if (NextCstNo != ValueList.size())
1247 return Error("Invalid constant reference!");
1249 if (Stream.ReadBlockEnd())
1250 return Error("Error at end of constants block");
1252 // Once all the constants have been read, go through and resolve forward
1254 ValueList.ResolveConstantForwardRefs();
1258 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1259 /// remember where it is and then skip it. This lets us lazily deserialize the
1261 bool BitcodeReader::RememberAndSkipFunctionBody() {
1262 // Get the function we are talking about.
1263 if (FunctionsWithBodies.empty())
1264 return Error("Insufficient function protos");
1266 Function *Fn = FunctionsWithBodies.back();
1267 FunctionsWithBodies.pop_back();
1269 // Save the current stream state.
1270 uint64_t CurBit = Stream.GetCurrentBitNo();
1271 DeferredFunctionInfo[Fn] = CurBit;
1273 // Skip over the function block for now.
1274 if (Stream.SkipBlock())
1275 return Error("Malformed block record");
1279 bool BitcodeReader::ParseModule() {
1280 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1281 return Error("Malformed block record");
1283 SmallVector<uint64_t, 64> Record;
1284 std::vector<std::string> SectionTable;
1285 std::vector<std::string> GCTable;
1287 // Read all the records for this module.
1288 while (!Stream.AtEndOfStream()) {
1289 unsigned Code = Stream.ReadCode();
1290 if (Code == bitc::END_BLOCK) {
1291 if (Stream.ReadBlockEnd())
1292 return Error("Error at end of module block");
1294 // Patch the initializers for globals and aliases up.
1295 ResolveGlobalAndAliasInits();
1296 if (!GlobalInits.empty() || !AliasInits.empty())
1297 return Error("Malformed global initializer set");
1298 if (!FunctionsWithBodies.empty())
1299 return Error("Too few function bodies found");
1301 // Look for intrinsic functions which need to be upgraded at some point
1302 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1305 if (UpgradeIntrinsicFunction(FI, NewFn))
1306 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1309 // Look for global variables which need to be renamed.
1310 for (Module::global_iterator
1311 GI = TheModule->global_begin(), GE = TheModule->global_end();
1313 UpgradeGlobalVariable(GI);
1315 // Force deallocation of memory for these vectors to favor the client that
1316 // want lazy deserialization.
1317 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1318 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1319 std::vector<Function*>().swap(FunctionsWithBodies);
1323 if (Code == bitc::ENTER_SUBBLOCK) {
1324 switch (Stream.ReadSubBlockID()) {
1325 default: // Skip unknown content.
1326 if (Stream.SkipBlock())
1327 return Error("Malformed block record");
1329 case bitc::BLOCKINFO_BLOCK_ID:
1330 if (Stream.ReadBlockInfoBlock())
1331 return Error("Malformed BlockInfoBlock");
1333 case bitc::PARAMATTR_BLOCK_ID:
1334 if (ParseAttributeBlock())
1337 case bitc::TYPE_BLOCK_ID:
1338 if (ParseTypeTable())
1341 case bitc::TYPE_SYMTAB_BLOCK_ID:
1342 if (ParseTypeSymbolTable())
1345 case bitc::VALUE_SYMTAB_BLOCK_ID:
1346 if (ParseValueSymbolTable())
1349 case bitc::CONSTANTS_BLOCK_ID:
1350 if (ParseConstants() || ResolveGlobalAndAliasInits())
1353 case bitc::METADATA_BLOCK_ID:
1354 if (ParseMetadata())
1357 case bitc::FUNCTION_BLOCK_ID:
1358 // If this is the first function body we've seen, reverse the
1359 // FunctionsWithBodies list.
1360 if (!HasReversedFunctionsWithBodies) {
1361 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1362 HasReversedFunctionsWithBodies = true;
1365 if (RememberAndSkipFunctionBody())
1372 if (Code == bitc::DEFINE_ABBREV) {
1373 Stream.ReadAbbrevRecord();
1378 switch (Stream.ReadRecord(Code, Record)) {
1379 default: break; // Default behavior, ignore unknown content.
1380 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1381 if (Record.size() < 1)
1382 return Error("Malformed MODULE_CODE_VERSION");
1383 // Only version #0 is supported so far.
1385 return Error("Unknown bitstream version!");
1387 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1389 if (ConvertToString(Record, 0, S))
1390 return Error("Invalid MODULE_CODE_TRIPLE record");
1391 TheModule->setTargetTriple(S);
1394 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1396 if (ConvertToString(Record, 0, S))
1397 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1398 TheModule->setDataLayout(S);
1401 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1403 if (ConvertToString(Record, 0, S))
1404 return Error("Invalid MODULE_CODE_ASM record");
1405 TheModule->setModuleInlineAsm(S);
1408 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1410 if (ConvertToString(Record, 0, S))
1411 return Error("Invalid MODULE_CODE_DEPLIB record");
1412 TheModule->addLibrary(S);
1415 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1417 if (ConvertToString(Record, 0, S))
1418 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1419 SectionTable.push_back(S);
1422 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1424 if (ConvertToString(Record, 0, S))
1425 return Error("Invalid MODULE_CODE_GCNAME record");
1426 GCTable.push_back(S);
1429 // GLOBALVAR: [pointer type, isconst, initid,
1430 // linkage, alignment, section, visibility, threadlocal,
1432 case bitc::MODULE_CODE_GLOBALVAR: {
1433 if (Record.size() < 6)
1434 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1435 const Type *Ty = getTypeByID(Record[0]);
1436 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1437 if (!Ty->isPointerTy())
1438 return Error("Global not a pointer type!");
1439 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1440 Ty = cast<PointerType>(Ty)->getElementType();
1442 bool isConstant = Record[1];
1443 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1444 unsigned Alignment = (1 << Record[4]) >> 1;
1445 std::string Section;
1447 if (Record[5]-1 >= SectionTable.size())
1448 return Error("Invalid section ID");
1449 Section = SectionTable[Record[5]-1];
1451 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1452 if (Record.size() > 6)
1453 Visibility = GetDecodedVisibility(Record[6]);
1454 bool isThreadLocal = false;
1455 if (Record.size() > 7)
1456 isThreadLocal = Record[7];
1458 bool UnnamedAddr = false;
1459 if (Record.size() > 8)
1460 UnnamedAddr = Record[8];
1462 GlobalVariable *NewGV =
1463 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1464 isThreadLocal, AddressSpace);
1465 NewGV->setAlignment(Alignment);
1466 if (!Section.empty())
1467 NewGV->setSection(Section);
1468 NewGV->setVisibility(Visibility);
1469 NewGV->setThreadLocal(isThreadLocal);
1470 NewGV->setUnnamedAddr(UnnamedAddr);
1472 ValueList.push_back(NewGV);
1474 // Remember which value to use for the global initializer.
1475 if (unsigned InitID = Record[2])
1476 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1479 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1480 // alignment, section, visibility, gc, unnamed_addr]
1481 case bitc::MODULE_CODE_FUNCTION: {
1482 if (Record.size() < 8)
1483 return Error("Invalid MODULE_CODE_FUNCTION record");
1484 const Type *Ty = getTypeByID(Record[0]);
1485 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1486 if (!Ty->isPointerTy())
1487 return Error("Function not a pointer type!");
1488 const FunctionType *FTy =
1489 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1491 return Error("Function not a pointer to function type!");
1493 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1496 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1497 bool isProto = Record[2];
1498 Func->setLinkage(GetDecodedLinkage(Record[3]));
1499 Func->setAttributes(getAttributes(Record[4]));
1501 Func->setAlignment((1 << Record[5]) >> 1);
1503 if (Record[6]-1 >= SectionTable.size())
1504 return Error("Invalid section ID");
1505 Func->setSection(SectionTable[Record[6]-1]);
1507 Func->setVisibility(GetDecodedVisibility(Record[7]));
1508 if (Record.size() > 8 && Record[8]) {
1509 if (Record[8]-1 > GCTable.size())
1510 return Error("Invalid GC ID");
1511 Func->setGC(GCTable[Record[8]-1].c_str());
1513 bool UnnamedAddr = false;
1514 if (Record.size() > 9)
1515 UnnamedAddr = Record[9];
1516 Func->setUnnamedAddr(UnnamedAddr);
1517 ValueList.push_back(Func);
1519 // If this is a function with a body, remember the prototype we are
1520 // creating now, so that we can match up the body with them later.
1522 FunctionsWithBodies.push_back(Func);
1525 // ALIAS: [alias type, aliasee val#, linkage]
1526 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1527 case bitc::MODULE_CODE_ALIAS: {
1528 if (Record.size() < 3)
1529 return Error("Invalid MODULE_ALIAS record");
1530 const Type *Ty = getTypeByID(Record[0]);
1531 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1532 if (!Ty->isPointerTy())
1533 return Error("Function not a pointer type!");
1535 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1537 // Old bitcode files didn't have visibility field.
1538 if (Record.size() > 3)
1539 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1540 ValueList.push_back(NewGA);
1541 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1544 /// MODULE_CODE_PURGEVALS: [numvals]
1545 case bitc::MODULE_CODE_PURGEVALS:
1546 // Trim down the value list to the specified size.
1547 if (Record.size() < 1 || Record[0] > ValueList.size())
1548 return Error("Invalid MODULE_PURGEVALS record");
1549 ValueList.shrinkTo(Record[0]);
1555 return Error("Premature end of bitstream");
1558 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1561 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1562 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1564 if (Buffer->getBufferSize() & 3) {
1565 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
1566 return Error("Invalid bitcode signature");
1568 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1571 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1572 // The magic number is 0x0B17C0DE stored in little endian.
1573 if (isBitcodeWrapper(BufPtr, BufEnd))
1574 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1575 return Error("Invalid bitcode wrapper header");
1577 StreamFile.init(BufPtr, BufEnd);
1578 Stream.init(StreamFile);
1580 // Sniff for the signature.
1581 if (Stream.Read(8) != 'B' ||
1582 Stream.Read(8) != 'C' ||
1583 Stream.Read(4) != 0x0 ||
1584 Stream.Read(4) != 0xC ||
1585 Stream.Read(4) != 0xE ||
1586 Stream.Read(4) != 0xD)
1587 return Error("Invalid bitcode signature");
1589 // We expect a number of well-defined blocks, though we don't necessarily
1590 // need to understand them all.
1591 while (!Stream.AtEndOfStream()) {
1592 unsigned Code = Stream.ReadCode();
1594 if (Code != bitc::ENTER_SUBBLOCK)
1595 return Error("Invalid record at top-level");
1597 unsigned BlockID = Stream.ReadSubBlockID();
1599 // We only know the MODULE subblock ID.
1601 case bitc::BLOCKINFO_BLOCK_ID:
1602 if (Stream.ReadBlockInfoBlock())
1603 return Error("Malformed BlockInfoBlock");
1605 case bitc::MODULE_BLOCK_ID:
1606 // Reject multiple MODULE_BLOCK's in a single bitstream.
1608 return Error("Multiple MODULE_BLOCKs in same stream");
1614 if (Stream.SkipBlock())
1615 return Error("Malformed block record");
1623 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1624 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1625 return Error("Malformed block record");
1627 SmallVector<uint64_t, 64> Record;
1629 // Read all the records for this module.
1630 while (!Stream.AtEndOfStream()) {
1631 unsigned Code = Stream.ReadCode();
1632 if (Code == bitc::END_BLOCK) {
1633 if (Stream.ReadBlockEnd())
1634 return Error("Error at end of module block");
1639 if (Code == bitc::ENTER_SUBBLOCK) {
1640 switch (Stream.ReadSubBlockID()) {
1641 default: // Skip unknown content.
1642 if (Stream.SkipBlock())
1643 return Error("Malformed block record");
1649 if (Code == bitc::DEFINE_ABBREV) {
1650 Stream.ReadAbbrevRecord();
1655 switch (Stream.ReadRecord(Code, Record)) {
1656 default: break; // Default behavior, ignore unknown content.
1657 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1658 if (Record.size() < 1)
1659 return Error("Malformed MODULE_CODE_VERSION");
1660 // Only version #0 is supported so far.
1662 return Error("Unknown bitstream version!");
1664 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1666 if (ConvertToString(Record, 0, S))
1667 return Error("Invalid MODULE_CODE_TRIPLE record");
1675 return Error("Premature end of bitstream");
1678 bool BitcodeReader::ParseTriple(std::string &Triple) {
1679 if (Buffer->getBufferSize() & 3)
1680 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1682 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1683 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1685 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1686 // The magic number is 0x0B17C0DE stored in little endian.
1687 if (isBitcodeWrapper(BufPtr, BufEnd))
1688 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1689 return Error("Invalid bitcode wrapper header");
1691 StreamFile.init(BufPtr, BufEnd);
1692 Stream.init(StreamFile);
1694 // Sniff for the signature.
1695 if (Stream.Read(8) != 'B' ||
1696 Stream.Read(8) != 'C' ||
1697 Stream.Read(4) != 0x0 ||
1698 Stream.Read(4) != 0xC ||
1699 Stream.Read(4) != 0xE ||
1700 Stream.Read(4) != 0xD)
1701 return Error("Invalid bitcode signature");
1703 // We expect a number of well-defined blocks, though we don't necessarily
1704 // need to understand them all.
1705 while (!Stream.AtEndOfStream()) {
1706 unsigned Code = Stream.ReadCode();
1708 if (Code != bitc::ENTER_SUBBLOCK)
1709 return Error("Invalid record at top-level");
1711 unsigned BlockID = Stream.ReadSubBlockID();
1713 // We only know the MODULE subblock ID.
1715 case bitc::MODULE_BLOCK_ID:
1716 if (ParseModuleTriple(Triple))
1720 if (Stream.SkipBlock())
1721 return Error("Malformed block record");
1729 /// ParseMetadataAttachment - Parse metadata attachments.
1730 bool BitcodeReader::ParseMetadataAttachment() {
1731 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1732 return Error("Malformed block record");
1734 SmallVector<uint64_t, 64> Record;
1736 unsigned Code = Stream.ReadCode();
1737 if (Code == bitc::END_BLOCK) {
1738 if (Stream.ReadBlockEnd())
1739 return Error("Error at end of PARAMATTR block");
1742 if (Code == bitc::DEFINE_ABBREV) {
1743 Stream.ReadAbbrevRecord();
1746 // Read a metadata attachment record.
1748 switch (Stream.ReadRecord(Code, Record)) {
1749 default: // Default behavior: ignore.
1751 // FIXME: Remove in LLVM 3.0.
1752 case bitc::METADATA_ATTACHMENT:
1753 LLVM2_7MetadataDetected = true;
1754 case bitc::METADATA_ATTACHMENT2: {
1755 unsigned RecordLength = Record.size();
1756 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1757 return Error ("Invalid METADATA_ATTACHMENT reader!");
1758 Instruction *Inst = InstructionList[Record[0]];
1759 for (unsigned i = 1; i != RecordLength; i = i+2) {
1760 unsigned Kind = Record[i];
1761 DenseMap<unsigned, unsigned>::iterator I =
1762 MDKindMap.find(Kind);
1763 if (I == MDKindMap.end())
1764 return Error("Invalid metadata kind ID");
1765 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1766 Inst->setMetadata(I->second, cast<MDNode>(Node));
1775 /// ParseFunctionBody - Lazily parse the specified function body block.
1776 bool BitcodeReader::ParseFunctionBody(Function *F) {
1777 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1778 return Error("Malformed block record");
1780 InstructionList.clear();
1781 unsigned ModuleValueListSize = ValueList.size();
1782 unsigned ModuleMDValueListSize = MDValueList.size();
1784 // Add all the function arguments to the value table.
1785 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1786 ValueList.push_back(I);
1788 unsigned NextValueNo = ValueList.size();
1789 BasicBlock *CurBB = 0;
1790 unsigned CurBBNo = 0;
1794 // Read all the records.
1795 SmallVector<uint64_t, 64> Record;
1797 unsigned Code = Stream.ReadCode();
1798 if (Code == bitc::END_BLOCK) {
1799 if (Stream.ReadBlockEnd())
1800 return Error("Error at end of function block");
1804 if (Code == bitc::ENTER_SUBBLOCK) {
1805 switch (Stream.ReadSubBlockID()) {
1806 default: // Skip unknown content.
1807 if (Stream.SkipBlock())
1808 return Error("Malformed block record");
1810 case bitc::CONSTANTS_BLOCK_ID:
1811 if (ParseConstants()) return true;
1812 NextValueNo = ValueList.size();
1814 case bitc::VALUE_SYMTAB_BLOCK_ID:
1815 if (ParseValueSymbolTable()) return true;
1817 case bitc::METADATA_ATTACHMENT_ID:
1818 if (ParseMetadataAttachment()) return true;
1820 case bitc::METADATA_BLOCK_ID:
1821 if (ParseMetadata()) return true;
1827 if (Code == bitc::DEFINE_ABBREV) {
1828 Stream.ReadAbbrevRecord();
1835 unsigned BitCode = Stream.ReadRecord(Code, Record);
1837 default: // Default behavior: reject
1838 return Error("Unknown instruction");
1839 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1840 if (Record.size() < 1 || Record[0] == 0)
1841 return Error("Invalid DECLAREBLOCKS record");
1842 // Create all the basic blocks for the function.
1843 FunctionBBs.resize(Record[0]);
1844 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1845 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1846 CurBB = FunctionBBs[0];
1850 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1851 // This record indicates that the last instruction is at the same
1852 // location as the previous instruction with a location.
1855 // Get the last instruction emitted.
1856 if (CurBB && !CurBB->empty())
1858 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1859 !FunctionBBs[CurBBNo-1]->empty())
1860 I = &FunctionBBs[CurBBNo-1]->back();
1862 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1863 I->setDebugLoc(LastLoc);
1867 // FIXME: Remove this in LLVM 3.0.
1868 case bitc::FUNC_CODE_DEBUG_LOC:
1869 LLVM2_7MetadataDetected = true;
1870 case bitc::FUNC_CODE_DEBUG_LOC2: { // DEBUG_LOC: [line, col, scope, ia]
1871 I = 0; // Get the last instruction emitted.
1872 if (CurBB && !CurBB->empty())
1874 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1875 !FunctionBBs[CurBBNo-1]->empty())
1876 I = &FunctionBBs[CurBBNo-1]->back();
1877 if (I == 0 || Record.size() < 4)
1878 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
1880 unsigned Line = Record[0], Col = Record[1];
1881 unsigned ScopeID = Record[2], IAID = Record[3];
1883 MDNode *Scope = 0, *IA = 0;
1884 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
1885 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
1886 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
1887 I->setDebugLoc(LastLoc);
1892 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1895 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1896 getValue(Record, OpNum, LHS->getType(), RHS) ||
1897 OpNum+1 > Record.size())
1898 return Error("Invalid BINOP record");
1900 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
1901 if (Opc == -1) return Error("Invalid BINOP record");
1902 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
1903 InstructionList.push_back(I);
1904 if (OpNum < Record.size()) {
1905 if (Opc == Instruction::Add ||
1906 Opc == Instruction::Sub ||
1907 Opc == Instruction::Mul ||
1908 Opc == Instruction::Shl) {
1909 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1910 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
1911 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1912 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
1913 } else if (Opc == Instruction::SDiv ||
1914 Opc == Instruction::UDiv ||
1915 Opc == Instruction::LShr ||
1916 Opc == Instruction::AShr) {
1917 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
1918 cast<BinaryOperator>(I)->setIsExact(true);
1923 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
1926 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1927 OpNum+2 != Record.size())
1928 return Error("Invalid CAST record");
1930 const Type *ResTy = getTypeByID(Record[OpNum]);
1931 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
1932 if (Opc == -1 || ResTy == 0)
1933 return Error("Invalid CAST record");
1934 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
1935 InstructionList.push_back(I);
1938 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
1939 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
1942 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
1943 return Error("Invalid GEP record");
1945 SmallVector<Value*, 16> GEPIdx;
1946 while (OpNum != Record.size()) {
1948 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1949 return Error("Invalid GEP record");
1950 GEPIdx.push_back(Op);
1953 I = GetElementPtrInst::Create(BasePtr, GEPIdx.begin(), GEPIdx.end());
1954 InstructionList.push_back(I);
1955 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
1956 cast<GetElementPtrInst>(I)->setIsInBounds(true);
1960 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
1961 // EXTRACTVAL: [opty, opval, n x indices]
1964 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1965 return Error("Invalid EXTRACTVAL record");
1967 SmallVector<unsigned, 4> EXTRACTVALIdx;
1968 for (unsigned RecSize = Record.size();
1969 OpNum != RecSize; ++OpNum) {
1970 uint64_t Index = Record[OpNum];
1971 if ((unsigned)Index != Index)
1972 return Error("Invalid EXTRACTVAL index");
1973 EXTRACTVALIdx.push_back((unsigned)Index);
1976 I = ExtractValueInst::Create(Agg,
1977 EXTRACTVALIdx.begin(), EXTRACTVALIdx.end());
1978 InstructionList.push_back(I);
1982 case bitc::FUNC_CODE_INST_INSERTVAL: {
1983 // INSERTVAL: [opty, opval, opty, opval, n x indices]
1986 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1987 return Error("Invalid INSERTVAL record");
1989 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
1990 return Error("Invalid INSERTVAL record");
1992 SmallVector<unsigned, 4> INSERTVALIdx;
1993 for (unsigned RecSize = Record.size();
1994 OpNum != RecSize; ++OpNum) {
1995 uint64_t Index = Record[OpNum];
1996 if ((unsigned)Index != Index)
1997 return Error("Invalid INSERTVAL index");
1998 INSERTVALIdx.push_back((unsigned)Index);
2001 I = InsertValueInst::Create(Agg, Val,
2002 INSERTVALIdx.begin(), INSERTVALIdx.end());
2003 InstructionList.push_back(I);
2007 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2008 // obsolete form of select
2009 // handles select i1 ... in old bitcode
2011 Value *TrueVal, *FalseVal, *Cond;
2012 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2013 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2014 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
2015 return Error("Invalid SELECT record");
2017 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2018 InstructionList.push_back(I);
2022 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2023 // new form of select
2024 // handles select i1 or select [N x i1]
2026 Value *TrueVal, *FalseVal, *Cond;
2027 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2028 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2029 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2030 return Error("Invalid SELECT record");
2032 // select condition can be either i1 or [N x i1]
2033 if (const VectorType* vector_type =
2034 dyn_cast<const VectorType>(Cond->getType())) {
2036 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2037 return Error("Invalid SELECT condition type");
2040 if (Cond->getType() != Type::getInt1Ty(Context))
2041 return Error("Invalid SELECT condition type");
2044 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2045 InstructionList.push_back(I);
2049 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2052 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2053 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2054 return Error("Invalid EXTRACTELT record");
2055 I = ExtractElementInst::Create(Vec, Idx);
2056 InstructionList.push_back(I);
2060 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2062 Value *Vec, *Elt, *Idx;
2063 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2064 getValue(Record, OpNum,
2065 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2066 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2067 return Error("Invalid INSERTELT record");
2068 I = InsertElementInst::Create(Vec, Elt, Idx);
2069 InstructionList.push_back(I);
2073 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2075 Value *Vec1, *Vec2, *Mask;
2076 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2077 getValue(Record, OpNum, Vec1->getType(), Vec2))
2078 return Error("Invalid SHUFFLEVEC record");
2080 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2081 return Error("Invalid SHUFFLEVEC record");
2082 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2083 InstructionList.push_back(I);
2087 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2088 // Old form of ICmp/FCmp returning bool
2089 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2090 // both legal on vectors but had different behaviour.
2091 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2092 // FCmp/ICmp returning bool or vector of bool
2096 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2097 getValue(Record, OpNum, LHS->getType(), RHS) ||
2098 OpNum+1 != Record.size())
2099 return Error("Invalid CMP record");
2101 if (LHS->getType()->isFPOrFPVectorTy())
2102 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2104 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2105 InstructionList.push_back(I);
2109 case bitc::FUNC_CODE_INST_GETRESULT: { // GETRESULT: [ty, val, n]
2110 if (Record.size() != 2)
2111 return Error("Invalid GETRESULT record");
2114 getValueTypePair(Record, OpNum, NextValueNo, Op);
2115 unsigned Index = Record[1];
2116 I = ExtractValueInst::Create(Op, Index);
2117 InstructionList.push_back(I);
2121 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2123 unsigned Size = Record.size();
2125 I = ReturnInst::Create(Context);
2126 InstructionList.push_back(I);
2131 SmallVector<Value *,4> Vs;
2134 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2135 return Error("Invalid RET record");
2137 } while(OpNum != Record.size());
2139 const Type *ReturnType = F->getReturnType();
2140 // Handle multiple return values. FIXME: Remove in LLVM 3.0.
2141 if (Vs.size() > 1 ||
2142 (ReturnType->isStructTy() &&
2143 (Vs.empty() || Vs[0]->getType() != ReturnType))) {
2144 Value *RV = UndefValue::get(ReturnType);
2145 for (unsigned i = 0, e = Vs.size(); i != e; ++i) {
2146 I = InsertValueInst::Create(RV, Vs[i], i, "mrv");
2147 InstructionList.push_back(I);
2148 CurBB->getInstList().push_back(I);
2149 ValueList.AssignValue(I, NextValueNo++);
2152 I = ReturnInst::Create(Context, RV);
2153 InstructionList.push_back(I);
2157 I = ReturnInst::Create(Context, Vs[0]);
2158 InstructionList.push_back(I);
2161 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2162 if (Record.size() != 1 && Record.size() != 3)
2163 return Error("Invalid BR record");
2164 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2166 return Error("Invalid BR record");
2168 if (Record.size() == 1) {
2169 I = BranchInst::Create(TrueDest);
2170 InstructionList.push_back(I);
2173 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2174 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
2175 if (FalseDest == 0 || Cond == 0)
2176 return Error("Invalid BR record");
2177 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2178 InstructionList.push_back(I);
2182 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2183 if (Record.size() < 3 || (Record.size() & 1) == 0)
2184 return Error("Invalid SWITCH record");
2185 const Type *OpTy = getTypeByID(Record[0]);
2186 Value *Cond = getFnValueByID(Record[1], OpTy);
2187 BasicBlock *Default = getBasicBlock(Record[2]);
2188 if (OpTy == 0 || Cond == 0 || Default == 0)
2189 return Error("Invalid SWITCH record");
2190 unsigned NumCases = (Record.size()-3)/2;
2191 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2192 InstructionList.push_back(SI);
2193 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2194 ConstantInt *CaseVal =
2195 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2196 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2197 if (CaseVal == 0 || DestBB == 0) {
2199 return Error("Invalid SWITCH record!");
2201 SI->addCase(CaseVal, DestBB);
2206 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2207 if (Record.size() < 2)
2208 return Error("Invalid INDIRECTBR record");
2209 const Type *OpTy = getTypeByID(Record[0]);
2210 Value *Address = getFnValueByID(Record[1], OpTy);
2211 if (OpTy == 0 || Address == 0)
2212 return Error("Invalid INDIRECTBR record");
2213 unsigned NumDests = Record.size()-2;
2214 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2215 InstructionList.push_back(IBI);
2216 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2217 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2218 IBI->addDestination(DestBB);
2221 return Error("Invalid INDIRECTBR record!");
2228 case bitc::FUNC_CODE_INST_INVOKE: {
2229 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2230 if (Record.size() < 4) return Error("Invalid INVOKE record");
2231 AttrListPtr PAL = getAttributes(Record[0]);
2232 unsigned CCInfo = Record[1];
2233 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2234 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2238 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2239 return Error("Invalid INVOKE record");
2241 const PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2242 const FunctionType *FTy = !CalleeTy ? 0 :
2243 dyn_cast<FunctionType>(CalleeTy->getElementType());
2245 // Check that the right number of fixed parameters are here.
2246 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2247 Record.size() < OpNum+FTy->getNumParams())
2248 return Error("Invalid INVOKE record");
2250 SmallVector<Value*, 16> Ops;
2251 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2252 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2253 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2256 if (!FTy->isVarArg()) {
2257 if (Record.size() != OpNum)
2258 return Error("Invalid INVOKE record");
2260 // Read type/value pairs for varargs params.
2261 while (OpNum != Record.size()) {
2263 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2264 return Error("Invalid INVOKE record");
2269 I = InvokeInst::Create(Callee, NormalBB, UnwindBB,
2270 Ops.begin(), Ops.end());
2271 InstructionList.push_back(I);
2272 cast<InvokeInst>(I)->setCallingConv(
2273 static_cast<CallingConv::ID>(CCInfo));
2274 cast<InvokeInst>(I)->setAttributes(PAL);
2277 case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
2278 I = new UnwindInst(Context);
2279 InstructionList.push_back(I);
2281 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2282 I = new UnreachableInst(Context);
2283 InstructionList.push_back(I);
2285 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2286 if (Record.size() < 1 || ((Record.size()-1)&1))
2287 return Error("Invalid PHI record");
2288 const Type *Ty = getTypeByID(Record[0]);
2289 if (!Ty) return Error("Invalid PHI record");
2291 PHINode *PN = PHINode::Create(Ty);
2292 InstructionList.push_back(PN);
2293 PN->reserveOperandSpace((Record.size()-1)/2);
2295 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2296 Value *V = getFnValueByID(Record[1+i], Ty);
2297 BasicBlock *BB = getBasicBlock(Record[2+i]);
2298 if (!V || !BB) return Error("Invalid PHI record");
2299 PN->addIncoming(V, BB);
2305 case bitc::FUNC_CODE_INST_MALLOC: { // MALLOC: [instty, op, align]
2306 // Autoupgrade malloc instruction to malloc call.
2307 // FIXME: Remove in LLVM 3.0.
2308 if (Record.size() < 3)
2309 return Error("Invalid MALLOC record");
2310 const PointerType *Ty =
2311 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2312 Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
2313 if (!Ty || !Size) return Error("Invalid MALLOC record");
2314 if (!CurBB) return Error("Invalid malloc instruction with no BB");
2315 const Type *Int32Ty = IntegerType::getInt32Ty(CurBB->getContext());
2316 Constant *AllocSize = ConstantExpr::getSizeOf(Ty->getElementType());
2317 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, Int32Ty);
2318 I = CallInst::CreateMalloc(CurBB, Int32Ty, Ty->getElementType(),
2319 AllocSize, Size, NULL);
2320 InstructionList.push_back(I);
2323 case bitc::FUNC_CODE_INST_FREE: { // FREE: [op, opty]
2326 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2327 OpNum != Record.size())
2328 return Error("Invalid FREE record");
2329 if (!CurBB) return Error("Invalid free instruction with no BB");
2330 I = CallInst::CreateFree(Op, CurBB);
2331 InstructionList.push_back(I);
2334 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2335 // For backward compatibility, tolerate a lack of an opty, and use i32.
2336 // Remove this in LLVM 3.0.
2337 if (Record.size() < 3 || Record.size() > 4)
2338 return Error("Invalid ALLOCA record");
2340 const PointerType *Ty =
2341 dyn_cast_or_null<PointerType>(getTypeByID(Record[OpNum++]));
2342 const Type *OpTy = Record.size() == 4 ? getTypeByID(Record[OpNum++]) :
2343 Type::getInt32Ty(Context);
2344 Value *Size = getFnValueByID(Record[OpNum++], OpTy);
2345 unsigned Align = Record[OpNum++];
2346 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2347 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2348 InstructionList.push_back(I);
2351 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2354 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2355 OpNum+2 != Record.size())
2356 return Error("Invalid LOAD record");
2358 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2359 InstructionList.push_back(I);
2362 case bitc::FUNC_CODE_INST_STORE2: { // STORE2:[ptrty, ptr, val, align, vol]
2365 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2366 getValue(Record, OpNum,
2367 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2368 OpNum+2 != Record.size())
2369 return Error("Invalid STORE record");
2371 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2372 InstructionList.push_back(I);
2375 case bitc::FUNC_CODE_INST_STORE: { // STORE:[val, valty, ptr, align, vol]
2376 // FIXME: Legacy form of store instruction. Should be removed in LLVM 3.0.
2379 if (getValueTypePair(Record, OpNum, NextValueNo, Val) ||
2380 getValue(Record, OpNum,
2381 PointerType::getUnqual(Val->getType()), Ptr)||
2382 OpNum+2 != Record.size())
2383 return Error("Invalid STORE record");
2385 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2386 InstructionList.push_back(I);
2389 // FIXME: Remove this in LLVM 3.0.
2390 case bitc::FUNC_CODE_INST_CALL:
2391 LLVM2_7MetadataDetected = true;
2392 case bitc::FUNC_CODE_INST_CALL2: {
2393 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2394 if (Record.size() < 3)
2395 return Error("Invalid CALL record");
2397 AttrListPtr PAL = getAttributes(Record[0]);
2398 unsigned CCInfo = Record[1];
2402 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2403 return Error("Invalid CALL record");
2405 const PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2406 const FunctionType *FTy = 0;
2407 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2408 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2409 return Error("Invalid CALL record");
2411 SmallVector<Value*, 16> Args;
2412 // Read the fixed params.
2413 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2414 if (FTy->getParamType(i)->getTypeID()==Type::LabelTyID)
2415 Args.push_back(getBasicBlock(Record[OpNum]));
2417 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2418 if (Args.back() == 0) return Error("Invalid CALL record");
2421 // Read type/value pairs for varargs params.
2422 if (!FTy->isVarArg()) {
2423 if (OpNum != Record.size())
2424 return Error("Invalid CALL record");
2426 while (OpNum != Record.size()) {
2428 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2429 return Error("Invalid CALL record");
2434 I = CallInst::Create(Callee, Args.begin(), Args.end());
2435 InstructionList.push_back(I);
2436 cast<CallInst>(I)->setCallingConv(
2437 static_cast<CallingConv::ID>(CCInfo>>1));
2438 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2439 cast<CallInst>(I)->setAttributes(PAL);
2442 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2443 if (Record.size() < 3)
2444 return Error("Invalid VAARG record");
2445 const Type *OpTy = getTypeByID(Record[0]);
2446 Value *Op = getFnValueByID(Record[1], OpTy);
2447 const Type *ResTy = getTypeByID(Record[2]);
2448 if (!OpTy || !Op || !ResTy)
2449 return Error("Invalid VAARG record");
2450 I = new VAArgInst(Op, ResTy);
2451 InstructionList.push_back(I);
2456 // Add instruction to end of current BB. If there is no current BB, reject
2460 return Error("Invalid instruction with no BB");
2462 CurBB->getInstList().push_back(I);
2464 // If this was a terminator instruction, move to the next block.
2465 if (isa<TerminatorInst>(I)) {
2467 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2470 // Non-void values get registered in the value table for future use.
2471 if (I && !I->getType()->isVoidTy())
2472 ValueList.AssignValue(I, NextValueNo++);
2475 // Check the function list for unresolved values.
2476 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2477 if (A->getParent() == 0) {
2478 // We found at least one unresolved value. Nuke them all to avoid leaks.
2479 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2480 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2481 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2485 return Error("Never resolved value found in function!");
2489 // FIXME: Check for unresolved forward-declared metadata references
2490 // and clean up leaks.
2492 // See if anything took the address of blocks in this function. If so,
2493 // resolve them now.
2494 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2495 BlockAddrFwdRefs.find(F);
2496 if (BAFRI != BlockAddrFwdRefs.end()) {
2497 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2498 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2499 unsigned BlockIdx = RefList[i].first;
2500 if (BlockIdx >= FunctionBBs.size())
2501 return Error("Invalid blockaddress block #");
2503 GlobalVariable *FwdRef = RefList[i].second;
2504 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2505 FwdRef->eraseFromParent();
2508 BlockAddrFwdRefs.erase(BAFRI);
2511 // FIXME: Remove this in LLVM 3.0.
2512 unsigned NewMDValueListSize = MDValueList.size();
2514 // Trim the value list down to the size it was before we parsed this function.
2515 ValueList.shrinkTo(ModuleValueListSize);
2516 MDValueList.shrinkTo(ModuleMDValueListSize);
2518 // Backwards compatibility hack: Function-local metadata numbers
2519 // were previously not reset between functions. This is now fixed,
2520 // however we still need to understand the old numbering in order
2521 // to be able to read old bitcode files.
2522 // FIXME: Remove this in LLVM 3.0.
2523 if (LLVM2_7MetadataDetected)
2524 MDValueList.resize(NewMDValueListSize);
2526 std::vector<BasicBlock*>().swap(FunctionBBs);
2531 //===----------------------------------------------------------------------===//
2532 // GVMaterializer implementation
2533 //===----------------------------------------------------------------------===//
2536 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2537 if (const Function *F = dyn_cast<Function>(GV)) {
2538 return F->isDeclaration() &&
2539 DeferredFunctionInfo.count(const_cast<Function*>(F));
2544 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2545 Function *F = dyn_cast<Function>(GV);
2546 // If it's not a function or is already material, ignore the request.
2547 if (!F || !F->isMaterializable()) return false;
2549 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2550 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2552 // Move the bit stream to the saved position of the deferred function body.
2553 Stream.JumpToBit(DFII->second);
2555 if (ParseFunctionBody(F)) {
2556 if (ErrInfo) *ErrInfo = ErrorString;
2560 // Upgrade any old intrinsic calls in the function.
2561 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2562 E = UpgradedIntrinsics.end(); I != E; ++I) {
2563 if (I->first != I->second) {
2564 for (Value::use_iterator UI = I->first->use_begin(),
2565 UE = I->first->use_end(); UI != UE; ) {
2566 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2567 UpgradeIntrinsicCall(CI, I->second);
2575 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2576 const Function *F = dyn_cast<Function>(GV);
2577 if (!F || F->isDeclaration())
2579 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2582 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2583 Function *F = dyn_cast<Function>(GV);
2584 // If this function isn't dematerializable, this is a noop.
2585 if (!F || !isDematerializable(F))
2588 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2590 // Just forget the function body, we can remat it later.
2595 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2596 assert(M == TheModule &&
2597 "Can only Materialize the Module this BitcodeReader is attached to.");
2598 // Iterate over the module, deserializing any functions that are still on
2600 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2602 if (F->isMaterializable() &&
2603 Materialize(F, ErrInfo))
2606 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2607 // delete the old functions to clean up. We can't do this unless the entire
2608 // module is materialized because there could always be another function body
2609 // with calls to the old function.
2610 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2611 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2612 if (I->first != I->second) {
2613 for (Value::use_iterator UI = I->first->use_begin(),
2614 UE = I->first->use_end(); UI != UE; ) {
2615 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2616 UpgradeIntrinsicCall(CI, I->second);
2618 if (!I->first->use_empty())
2619 I->first->replaceAllUsesWith(I->second);
2620 I->first->eraseFromParent();
2623 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2625 // Check debug info intrinsics.
2626 CheckDebugInfoIntrinsics(TheModule);
2632 //===----------------------------------------------------------------------===//
2633 // External interface
2634 //===----------------------------------------------------------------------===//
2636 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2638 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2639 LLVMContext& Context,
2640 std::string *ErrMsg) {
2641 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2642 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2643 M->setMaterializer(R);
2644 if (R->ParseBitcodeInto(M)) {
2646 *ErrMsg = R->getErrorString();
2648 delete M; // Also deletes R.
2651 // Have the BitcodeReader dtor delete 'Buffer'.
2652 R->setBufferOwned(true);
2656 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2657 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2658 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2659 std::string *ErrMsg){
2660 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2663 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2664 // there was an error.
2665 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2667 // Read in the entire module, and destroy the BitcodeReader.
2668 if (M->MaterializeAllPermanently(ErrMsg)) {
2676 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
2677 LLVMContext& Context,
2678 std::string *ErrMsg) {
2679 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2680 // Don't let the BitcodeReader dtor delete 'Buffer'.
2681 R->setBufferOwned(false);
2683 std::string Triple("");
2684 if (R->ParseTriple(Triple))
2686 *ErrMsg = R->getErrorString();