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() {
33 std::vector<PATypeHolder>().swap(TypeList);
37 std::vector<AttrListPtr>().swap(MAttributes);
38 std::vector<BasicBlock*>().swap(FunctionBBs);
39 std::vector<Function*>().swap(FunctionsWithBodies);
40 DeferredFunctionInfo.clear();
43 //===----------------------------------------------------------------------===//
44 // Helper functions to implement forward reference resolution, etc.
45 //===----------------------------------------------------------------------===//
47 /// ConvertToString - Convert a string from a record into an std::string, return
49 template<typename StrTy>
50 static bool ConvertToString(SmallVector<uint64_t, 64> &Record, unsigned Idx,
52 if (Idx > Record.size())
55 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
56 Result += (char)Record[i];
60 static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
62 default: // Map unknown/new linkages to external
63 case 0: return GlobalValue::ExternalLinkage;
64 case 1: return GlobalValue::WeakAnyLinkage;
65 case 2: return GlobalValue::AppendingLinkage;
66 case 3: return GlobalValue::InternalLinkage;
67 case 4: return GlobalValue::LinkOnceAnyLinkage;
68 case 5: return GlobalValue::DLLImportLinkage;
69 case 6: return GlobalValue::DLLExportLinkage;
70 case 7: return GlobalValue::ExternalWeakLinkage;
71 case 8: return GlobalValue::CommonLinkage;
72 case 9: return GlobalValue::PrivateLinkage;
73 case 10: return GlobalValue::WeakODRLinkage;
74 case 11: return GlobalValue::LinkOnceODRLinkage;
75 case 12: return GlobalValue::AvailableExternallyLinkage;
76 case 13: return GlobalValue::LinkerPrivateLinkage;
80 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
82 default: // Map unknown visibilities to default.
83 case 0: return GlobalValue::DefaultVisibility;
84 case 1: return GlobalValue::HiddenVisibility;
85 case 2: return GlobalValue::ProtectedVisibility;
89 static int GetDecodedCastOpcode(unsigned Val) {
92 case bitc::CAST_TRUNC : return Instruction::Trunc;
93 case bitc::CAST_ZEXT : return Instruction::ZExt;
94 case bitc::CAST_SEXT : return Instruction::SExt;
95 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
96 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
97 case bitc::CAST_UITOFP : return Instruction::UIToFP;
98 case bitc::CAST_SITOFP : return Instruction::SIToFP;
99 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
100 case bitc::CAST_FPEXT : return Instruction::FPExt;
101 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
102 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
103 case bitc::CAST_BITCAST : return Instruction::BitCast;
106 static int GetDecodedBinaryOpcode(unsigned Val, const Type *Ty) {
109 case bitc::BINOP_ADD:
110 return Ty->isFPOrFPVector() ? Instruction::FAdd : Instruction::Add;
111 case bitc::BINOP_SUB:
112 return Ty->isFPOrFPVector() ? Instruction::FSub : Instruction::Sub;
113 case bitc::BINOP_MUL:
114 return Ty->isFPOrFPVector() ? Instruction::FMul : Instruction::Mul;
115 case bitc::BINOP_UDIV: return Instruction::UDiv;
116 case bitc::BINOP_SDIV:
117 return Ty->isFPOrFPVector() ? Instruction::FDiv : Instruction::SDiv;
118 case bitc::BINOP_UREM: return Instruction::URem;
119 case bitc::BINOP_SREM:
120 return Ty->isFPOrFPVector() ? Instruction::FRem : Instruction::SRem;
121 case bitc::BINOP_SHL: return Instruction::Shl;
122 case bitc::BINOP_LSHR: return Instruction::LShr;
123 case bitc::BINOP_ASHR: return Instruction::AShr;
124 case bitc::BINOP_AND: return Instruction::And;
125 case bitc::BINOP_OR: return Instruction::Or;
126 case bitc::BINOP_XOR: return Instruction::Xor;
132 /// @brief A class for maintaining the slot number definition
133 /// as a placeholder for the actual definition for forward constants defs.
134 class ConstantPlaceHolder : public ConstantExpr {
135 ConstantPlaceHolder(); // DO NOT IMPLEMENT
136 void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
138 // allocate space for exactly one operand
139 void *operator new(size_t s) {
140 return User::operator new(s, 1);
142 explicit ConstantPlaceHolder(const Type *Ty, LLVMContext& Context)
143 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
144 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
147 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
148 static inline bool classof(const ConstantPlaceHolder *) { return true; }
149 static bool classof(const Value *V) {
150 return isa<ConstantExpr>(V) &&
151 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
155 /// Provide fast operand accessors
156 //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
160 // FIXME: can we inherit this from ConstantExpr?
162 struct OperandTraits<ConstantPlaceHolder> : public FixedNumOperandTraits<1> {
167 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
176 WeakVH &OldV = ValuePtrs[Idx];
182 // Handle constants and non-constants (e.g. instrs) differently for
184 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
185 ResolveConstants.push_back(std::make_pair(PHC, Idx));
188 // If there was a forward reference to this value, replace it.
189 Value *PrevVal = OldV;
190 OldV->replaceAllUsesWith(V);
196 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
201 if (Value *V = ValuePtrs[Idx]) {
202 assert(Ty == V->getType() && "Type mismatch in constant table!");
203 return cast<Constant>(V);
206 // Create and return a placeholder, which will later be RAUW'd.
207 Constant *C = new ConstantPlaceHolder(Ty, Context);
212 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, const Type *Ty) {
216 if (Value *V = ValuePtrs[Idx]) {
217 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
221 // No type specified, must be invalid reference.
222 if (Ty == 0) return 0;
224 // Create and return a placeholder, which will later be RAUW'd.
225 Value *V = new Argument(Ty);
230 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
231 /// resolves any forward references. The idea behind this is that we sometimes
232 /// get constants (such as large arrays) which reference *many* forward ref
233 /// constants. Replacing each of these causes a lot of thrashing when
234 /// building/reuniquing the constant. Instead of doing this, we look at all the
235 /// uses and rewrite all the place holders at once for any constant that uses
237 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
238 // Sort the values by-pointer so that they are efficient to look up with a
240 std::sort(ResolveConstants.begin(), ResolveConstants.end());
242 SmallVector<Constant*, 64> NewOps;
244 while (!ResolveConstants.empty()) {
245 Value *RealVal = operator[](ResolveConstants.back().second);
246 Constant *Placeholder = ResolveConstants.back().first;
247 ResolveConstants.pop_back();
249 // Loop over all users of the placeholder, updating them to reference the
250 // new value. If they reference more than one placeholder, update them all
252 while (!Placeholder->use_empty()) {
253 Value::use_iterator UI = Placeholder->use_begin();
255 // If the using object isn't uniqued, just update the operands. This
256 // handles instructions and initializers for global variables.
257 if (!isa<Constant>(*UI) || isa<GlobalValue>(*UI)) {
258 UI.getUse().set(RealVal);
262 // Otherwise, we have a constant that uses the placeholder. Replace that
263 // constant with a new constant that has *all* placeholder uses updated.
264 Constant *UserC = cast<Constant>(*UI);
265 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
268 if (!isa<ConstantPlaceHolder>(*I)) {
269 // Not a placeholder reference.
271 } else if (*I == Placeholder) {
272 // Common case is that it just references this one placeholder.
275 // Otherwise, look up the placeholder in ResolveConstants.
276 ResolveConstantsTy::iterator It =
277 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
278 std::pair<Constant*, unsigned>(cast<Constant>(*I),
280 assert(It != ResolveConstants.end() && It->first == *I);
281 NewOp = operator[](It->second);
284 NewOps.push_back(cast<Constant>(NewOp));
287 // Make the new constant.
289 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
290 NewC = ConstantArray::get(UserCA->getType(), &NewOps[0],
292 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
293 NewC = ConstantStruct::get(Context, &NewOps[0], NewOps.size(),
294 UserCS->getType()->isPacked());
295 } else if (isa<ConstantVector>(UserC)) {
296 NewC = ConstantVector::get(&NewOps[0], NewOps.size());
298 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
299 NewC = cast<ConstantExpr>(UserC)->getWithOperands(&NewOps[0],
303 UserC->replaceAllUsesWith(NewC);
304 UserC->destroyConstant();
308 // Update all ValueHandles, they should be the only users at this point.
309 Placeholder->replaceAllUsesWith(RealVal);
314 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
323 WeakVH &OldV = MDValuePtrs[Idx];
329 // If there was a forward reference to this value, replace it.
330 Value *PrevVal = OldV;
331 OldV->replaceAllUsesWith(V);
333 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
335 MDValuePtrs[Idx] = V;
338 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
342 if (Value *V = MDValuePtrs[Idx]) {
343 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
347 // Create and return a placeholder, which will later be RAUW'd.
348 Value *V = new Argument(Type::getMetadataTy(Context));
349 MDValuePtrs[Idx] = V;
353 const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
354 // If the TypeID is in range, return it.
355 if (ID < TypeList.size())
356 return TypeList[ID].get();
357 if (!isTypeTable) return 0;
359 // The type table allows forward references. Push as many Opaque types as
360 // needed to get up to ID.
361 while (TypeList.size() <= ID)
362 TypeList.push_back(OpaqueType::get(Context));
363 return TypeList.back().get();
366 //===----------------------------------------------------------------------===//
367 // Functions for parsing blocks from the bitcode file
368 //===----------------------------------------------------------------------===//
370 bool BitcodeReader::ParseAttributeBlock() {
371 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
372 return Error("Malformed block record");
374 if (!MAttributes.empty())
375 return Error("Multiple PARAMATTR blocks found!");
377 SmallVector<uint64_t, 64> Record;
379 SmallVector<AttributeWithIndex, 8> Attrs;
381 // Read all the records.
383 unsigned Code = Stream.ReadCode();
384 if (Code == bitc::END_BLOCK) {
385 if (Stream.ReadBlockEnd())
386 return Error("Error at end of PARAMATTR block");
390 if (Code == bitc::ENTER_SUBBLOCK) {
391 // No known subblocks, always skip them.
392 Stream.ReadSubBlockID();
393 if (Stream.SkipBlock())
394 return Error("Malformed block record");
398 if (Code == bitc::DEFINE_ABBREV) {
399 Stream.ReadAbbrevRecord();
405 switch (Stream.ReadRecord(Code, Record)) {
406 default: // Default behavior: ignore.
408 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
409 if (Record.size() & 1)
410 return Error("Invalid ENTRY record");
412 // FIXME : Remove this autoupgrade code in LLVM 3.0.
413 // If Function attributes are using index 0 then transfer them
414 // to index ~0. Index 0 is used for return value attributes but used to be
415 // used for function attributes.
416 Attributes RetAttribute = Attribute::None;
417 Attributes FnAttribute = Attribute::None;
418 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
419 // FIXME: remove in LLVM 3.0
420 // The alignment is stored as a 16-bit raw value from bits 31--16.
421 // We shift the bits above 31 down by 11 bits.
423 unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
424 if (Alignment && !isPowerOf2_32(Alignment))
425 return Error("Alignment is not a power of two.");
427 Attributes ReconstitutedAttr = Record[i+1] & 0xffff;
429 ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
430 ReconstitutedAttr |= (Record[i+1] & (0xffffull << 32)) >> 11;
431 Record[i+1] = ReconstitutedAttr;
434 RetAttribute = Record[i+1];
435 else if (Record[i] == ~0U)
436 FnAttribute = Record[i+1];
439 unsigned OldRetAttrs = (Attribute::NoUnwind|Attribute::NoReturn|
440 Attribute::ReadOnly|Attribute::ReadNone);
442 if (FnAttribute == Attribute::None && RetAttribute != Attribute::None &&
443 (RetAttribute & OldRetAttrs) != 0) {
444 if (FnAttribute == Attribute::None) { // add a slot so they get added.
445 Record.push_back(~0U);
449 FnAttribute |= RetAttribute & OldRetAttrs;
450 RetAttribute &= ~OldRetAttrs;
453 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
454 if (Record[i] == 0) {
455 if (RetAttribute != Attribute::None)
456 Attrs.push_back(AttributeWithIndex::get(0, RetAttribute));
457 } else if (Record[i] == ~0U) {
458 if (FnAttribute != Attribute::None)
459 Attrs.push_back(AttributeWithIndex::get(~0U, FnAttribute));
460 } else if (Record[i+1] != Attribute::None)
461 Attrs.push_back(AttributeWithIndex::get(Record[i], Record[i+1]));
464 MAttributes.push_back(AttrListPtr::get(Attrs.begin(), Attrs.end()));
473 bool BitcodeReader::ParseTypeTable() {
474 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID))
475 return Error("Malformed block record");
477 if (!TypeList.empty())
478 return Error("Multiple TYPE_BLOCKs found!");
480 SmallVector<uint64_t, 64> Record;
481 unsigned NumRecords = 0;
483 // Read all the records for this type table.
485 unsigned Code = Stream.ReadCode();
486 if (Code == bitc::END_BLOCK) {
487 if (NumRecords != TypeList.size())
488 return Error("Invalid type forward reference in TYPE_BLOCK");
489 if (Stream.ReadBlockEnd())
490 return Error("Error at end of type table block");
494 if (Code == bitc::ENTER_SUBBLOCK) {
495 // No known subblocks, always skip them.
496 Stream.ReadSubBlockID();
497 if (Stream.SkipBlock())
498 return Error("Malformed block record");
502 if (Code == bitc::DEFINE_ABBREV) {
503 Stream.ReadAbbrevRecord();
509 const Type *ResultTy = 0;
510 switch (Stream.ReadRecord(Code, Record)) {
511 default: // Default behavior: unknown type.
514 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
515 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
516 // type list. This allows us to reserve space.
517 if (Record.size() < 1)
518 return Error("Invalid TYPE_CODE_NUMENTRY record");
519 TypeList.reserve(Record[0]);
521 case bitc::TYPE_CODE_VOID: // VOID
522 ResultTy = Type::getVoidTy(Context);
524 case bitc::TYPE_CODE_FLOAT: // FLOAT
525 ResultTy = Type::getFloatTy(Context);
527 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
528 ResultTy = Type::getDoubleTy(Context);
530 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
531 ResultTy = Type::getX86_FP80Ty(Context);
533 case bitc::TYPE_CODE_FP128: // FP128
534 ResultTy = Type::getFP128Ty(Context);
536 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
537 ResultTy = Type::getPPC_FP128Ty(Context);
539 case bitc::TYPE_CODE_LABEL: // LABEL
540 ResultTy = Type::getLabelTy(Context);
542 case bitc::TYPE_CODE_OPAQUE: // OPAQUE
545 case bitc::TYPE_CODE_METADATA: // METADATA
546 ResultTy = Type::getMetadataTy(Context);
548 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
549 if (Record.size() < 1)
550 return Error("Invalid Integer type record");
552 ResultTy = IntegerType::get(Context, Record[0]);
554 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
555 // [pointee type, address space]
556 if (Record.size() < 1)
557 return Error("Invalid POINTER type record");
558 unsigned AddressSpace = 0;
559 if (Record.size() == 2)
560 AddressSpace = Record[1];
561 ResultTy = PointerType::get(getTypeByID(Record[0], true),
565 case bitc::TYPE_CODE_FUNCTION: {
566 // FIXME: attrid is dead, remove it in LLVM 3.0
567 // FUNCTION: [vararg, attrid, retty, paramty x N]
568 if (Record.size() < 3)
569 return Error("Invalid FUNCTION type record");
570 std::vector<const Type*> ArgTys;
571 for (unsigned i = 3, e = Record.size(); i != e; ++i)
572 ArgTys.push_back(getTypeByID(Record[i], true));
574 ResultTy = FunctionType::get(getTypeByID(Record[2], true), ArgTys,
578 case bitc::TYPE_CODE_STRUCT: { // STRUCT: [ispacked, eltty x N]
579 if (Record.size() < 1)
580 return Error("Invalid STRUCT type record");
581 std::vector<const Type*> EltTys;
582 for (unsigned i = 1, e = Record.size(); i != e; ++i)
583 EltTys.push_back(getTypeByID(Record[i], true));
584 ResultTy = StructType::get(Context, EltTys, Record[0]);
587 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
588 if (Record.size() < 2)
589 return Error("Invalid ARRAY type record");
590 ResultTy = ArrayType::get(getTypeByID(Record[1], true), Record[0]);
592 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
593 if (Record.size() < 2)
594 return Error("Invalid VECTOR type record");
595 ResultTy = VectorType::get(getTypeByID(Record[1], true), Record[0]);
599 if (NumRecords == TypeList.size()) {
600 // If this is a new type slot, just append it.
601 TypeList.push_back(ResultTy ? ResultTy : OpaqueType::get(Context));
603 } else if (ResultTy == 0) {
604 // Otherwise, this was forward referenced, so an opaque type was created,
605 // but the result type is actually just an opaque. Leave the one we
606 // created previously.
609 // Otherwise, this was forward referenced, so an opaque type was created.
610 // Resolve the opaque type to the real type now.
611 assert(NumRecords < TypeList.size() && "Typelist imbalance");
612 const OpaqueType *OldTy = cast<OpaqueType>(TypeList[NumRecords++].get());
614 // Don't directly push the new type on the Tab. Instead we want to replace
615 // the opaque type we previously inserted with the new concrete value. The
616 // refinement from the abstract (opaque) type to the new type causes all
617 // uses of the abstract type to use the concrete type (NewTy). This will
618 // also cause the opaque type to be deleted.
619 const_cast<OpaqueType*>(OldTy)->refineAbstractTypeTo(ResultTy);
621 // This should have replaced the old opaque type with the new type in the
622 // value table... or with a preexisting type that was already in the
623 // system. Let's just make sure it did.
624 assert(TypeList[NumRecords-1].get() != OldTy &&
625 "refineAbstractType didn't work!");
631 bool BitcodeReader::ParseTypeSymbolTable() {
632 if (Stream.EnterSubBlock(bitc::TYPE_SYMTAB_BLOCK_ID))
633 return Error("Malformed block record");
635 SmallVector<uint64_t, 64> Record;
637 // Read all the records for this type table.
638 std::string TypeName;
640 unsigned Code = Stream.ReadCode();
641 if (Code == bitc::END_BLOCK) {
642 if (Stream.ReadBlockEnd())
643 return Error("Error at end of type symbol table block");
647 if (Code == bitc::ENTER_SUBBLOCK) {
648 // No known subblocks, always skip them.
649 Stream.ReadSubBlockID();
650 if (Stream.SkipBlock())
651 return Error("Malformed block record");
655 if (Code == bitc::DEFINE_ABBREV) {
656 Stream.ReadAbbrevRecord();
662 switch (Stream.ReadRecord(Code, Record)) {
663 default: // Default behavior: unknown type.
665 case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namechar x N]
666 if (ConvertToString(Record, 1, TypeName))
667 return Error("Invalid TST_ENTRY record");
668 unsigned TypeID = Record[0];
669 if (TypeID >= TypeList.size())
670 return Error("Invalid Type ID in TST_ENTRY record");
672 TheModule->addTypeName(TypeName, TypeList[TypeID].get());
679 bool BitcodeReader::ParseValueSymbolTable() {
680 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
681 return Error("Malformed block record");
683 SmallVector<uint64_t, 64> Record;
685 // Read all the records for this value table.
686 SmallString<128> ValueName;
688 unsigned Code = Stream.ReadCode();
689 if (Code == bitc::END_BLOCK) {
690 if (Stream.ReadBlockEnd())
691 return Error("Error at end of value symbol table block");
694 if (Code == bitc::ENTER_SUBBLOCK) {
695 // No known subblocks, always skip them.
696 Stream.ReadSubBlockID();
697 if (Stream.SkipBlock())
698 return Error("Malformed block record");
702 if (Code == bitc::DEFINE_ABBREV) {
703 Stream.ReadAbbrevRecord();
709 switch (Stream.ReadRecord(Code, Record)) {
710 default: // Default behavior: unknown type.
712 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
713 if (ConvertToString(Record, 1, ValueName))
714 return Error("Invalid VST_ENTRY record");
715 unsigned ValueID = Record[0];
716 if (ValueID >= ValueList.size())
717 return Error("Invalid Value ID in VST_ENTRY record");
718 Value *V = ValueList[ValueID];
720 V->setName(StringRef(ValueName.data(), ValueName.size()));
724 case bitc::VST_CODE_BBENTRY: {
725 if (ConvertToString(Record, 1, ValueName))
726 return Error("Invalid VST_BBENTRY record");
727 BasicBlock *BB = getBasicBlock(Record[0]);
729 return Error("Invalid BB ID in VST_BBENTRY record");
731 BB->setName(StringRef(ValueName.data(), ValueName.size()));
739 bool BitcodeReader::ParseMetadata() {
740 unsigned NextMDValueNo = MDValueList.size();
742 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
743 return Error("Malformed block record");
745 SmallVector<uint64_t, 64> Record;
747 // Read all the records.
749 unsigned Code = Stream.ReadCode();
750 if (Code == bitc::END_BLOCK) {
751 if (Stream.ReadBlockEnd())
752 return Error("Error at end of PARAMATTR block");
756 if (Code == bitc::ENTER_SUBBLOCK) {
757 // No known subblocks, always skip them.
758 Stream.ReadSubBlockID();
759 if (Stream.SkipBlock())
760 return Error("Malformed block record");
764 if (Code == bitc::DEFINE_ABBREV) {
765 Stream.ReadAbbrevRecord();
769 bool IsFunctionLocal = false;
772 switch (Stream.ReadRecord(Code, Record)) {
773 default: // Default behavior: ignore.
775 case bitc::METADATA_NAME: {
776 // Read named of the named metadata.
777 unsigned NameLength = Record.size();
779 Name.resize(NameLength);
780 for (unsigned i = 0; i != NameLength; ++i)
783 Code = Stream.ReadCode();
785 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
786 if (Stream.ReadRecord(Code, Record) != bitc::METADATA_NAMED_NODE)
787 assert ( 0 && "Inavlid Named Metadata record");
789 // Read named metadata elements.
790 unsigned Size = Record.size();
791 SmallVector<MDNode *, 8> Elts;
792 for (unsigned i = 0; i != Size; ++i) {
793 if (Record[i] == ~0U) {
794 Elts.push_back(NULL);
797 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
799 return Error("Malformed metadata record");
802 Value *V = NamedMDNode::Create(Context, Name.str(), Elts.data(),
803 Elts.size(), TheModule);
804 MDValueList.AssignValue(V, NextMDValueNo++);
807 case bitc::METADATA_FN_NODE:
808 IsFunctionLocal = true;
810 case bitc::METADATA_NODE: {
811 if (Record.empty() || Record.size() % 2 == 1)
812 return Error("Invalid METADATA_NODE record");
814 unsigned Size = Record.size();
815 SmallVector<Value*, 8> Elts;
816 for (unsigned i = 0; i != Size; i += 2) {
817 const Type *Ty = getTypeByID(Record[i], false);
818 if (Ty->isMetadataTy())
819 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
820 else if (!Ty->isVoidTy())
821 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
823 Elts.push_back(NULL);
825 Value *V = MDNode::getWhenValsUnresolved(Context, &Elts[0], Elts.size(),
827 IsFunctionLocal = false;
828 MDValueList.AssignValue(V, NextMDValueNo++);
831 case bitc::METADATA_STRING: {
832 unsigned MDStringLength = Record.size();
833 SmallString<8> String;
834 String.resize(MDStringLength);
835 for (unsigned i = 0; i != MDStringLength; ++i)
836 String[i] = Record[i];
837 Value *V = MDString::get(Context,
838 StringRef(String.data(), String.size()));
839 MDValueList.AssignValue(V, NextMDValueNo++);
842 case bitc::METADATA_KIND: {
843 unsigned RecordLength = Record.size();
844 if (Record.empty() || RecordLength < 2)
845 return Error("Invalid METADATA_KIND record");
847 Name.resize(RecordLength-1);
848 unsigned Kind = Record[0];
850 for (unsigned i = 1; i != RecordLength; ++i)
851 Name[i-1] = Record[i];
853 unsigned NewKind = TheModule->getMDKindID(Name.str());
854 assert(Kind == NewKind &&
855 "FIXME: Unable to handle custom metadata mismatch!");(void)NewKind;
862 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
863 /// the LSB for dense VBR encoding.
864 static uint64_t DecodeSignRotatedValue(uint64_t V) {
869 // There is no such thing as -0 with integers. "-0" really means MININT.
873 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
874 /// values and aliases that we can.
875 bool BitcodeReader::ResolveGlobalAndAliasInits() {
876 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
877 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
879 GlobalInitWorklist.swap(GlobalInits);
880 AliasInitWorklist.swap(AliasInits);
882 while (!GlobalInitWorklist.empty()) {
883 unsigned ValID = GlobalInitWorklist.back().second;
884 if (ValID >= ValueList.size()) {
885 // Not ready to resolve this yet, it requires something later in the file.
886 GlobalInits.push_back(GlobalInitWorklist.back());
888 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
889 GlobalInitWorklist.back().first->setInitializer(C);
891 return Error("Global variable initializer is not a constant!");
893 GlobalInitWorklist.pop_back();
896 while (!AliasInitWorklist.empty()) {
897 unsigned ValID = AliasInitWorklist.back().second;
898 if (ValID >= ValueList.size()) {
899 AliasInits.push_back(AliasInitWorklist.back());
901 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
902 AliasInitWorklist.back().first->setAliasee(C);
904 return Error("Alias initializer is not a constant!");
906 AliasInitWorklist.pop_back();
911 bool BitcodeReader::ParseConstants() {
912 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
913 return Error("Malformed block record");
915 SmallVector<uint64_t, 64> Record;
917 // Read all the records for this value table.
918 const Type *CurTy = Type::getInt32Ty(Context);
919 unsigned NextCstNo = ValueList.size();
921 unsigned Code = Stream.ReadCode();
922 if (Code == bitc::END_BLOCK)
925 if (Code == bitc::ENTER_SUBBLOCK) {
926 // No known subblocks, always skip them.
927 Stream.ReadSubBlockID();
928 if (Stream.SkipBlock())
929 return Error("Malformed block record");
933 if (Code == bitc::DEFINE_ABBREV) {
934 Stream.ReadAbbrevRecord();
941 unsigned BitCode = Stream.ReadRecord(Code, Record);
943 default: // Default behavior: unknown constant
944 case bitc::CST_CODE_UNDEF: // UNDEF
945 V = UndefValue::get(CurTy);
947 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
949 return Error("Malformed CST_SETTYPE record");
950 if (Record[0] >= TypeList.size())
951 return Error("Invalid Type ID in CST_SETTYPE record");
952 CurTy = TypeList[Record[0]];
953 continue; // Skip the ValueList manipulation.
954 case bitc::CST_CODE_NULL: // NULL
955 V = Constant::getNullValue(CurTy);
957 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
958 if (!isa<IntegerType>(CurTy) || Record.empty())
959 return Error("Invalid CST_INTEGER record");
960 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
962 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
963 if (!isa<IntegerType>(CurTy) || Record.empty())
964 return Error("Invalid WIDE_INTEGER record");
966 unsigned NumWords = Record.size();
967 SmallVector<uint64_t, 8> Words;
968 Words.resize(NumWords);
969 for (unsigned i = 0; i != NumWords; ++i)
970 Words[i] = DecodeSignRotatedValue(Record[i]);
971 V = ConstantInt::get(Context,
972 APInt(cast<IntegerType>(CurTy)->getBitWidth(),
973 NumWords, &Words[0]));
976 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
978 return Error("Invalid FLOAT record");
979 if (CurTy->isFloatTy())
980 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
981 else if (CurTy->isDoubleTy())
982 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
983 else if (CurTy->isX86_FP80Ty()) {
984 // Bits are not stored the same way as a normal i80 APInt, compensate.
985 uint64_t Rearrange[2];
986 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
987 Rearrange[1] = Record[0] >> 48;
988 V = ConstantFP::get(Context, APFloat(APInt(80, 2, Rearrange)));
989 } else if (CurTy->isFP128Ty())
990 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0]), true));
991 else if (CurTy->isPPC_FP128Ty())
992 V = ConstantFP::get(Context, APFloat(APInt(128, 2, &Record[0])));
994 V = UndefValue::get(CurTy);
998 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1000 return Error("Invalid CST_AGGREGATE record");
1002 unsigned Size = Record.size();
1003 std::vector<Constant*> Elts;
1005 if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
1006 for (unsigned i = 0; i != Size; ++i)
1007 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1008 STy->getElementType(i)));
1009 V = ConstantStruct::get(STy, Elts);
1010 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1011 const Type *EltTy = ATy->getElementType();
1012 for (unsigned i = 0; i != Size; ++i)
1013 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1014 V = ConstantArray::get(ATy, Elts);
1015 } else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1016 const Type *EltTy = VTy->getElementType();
1017 for (unsigned i = 0; i != Size; ++i)
1018 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1019 V = ConstantVector::get(Elts);
1021 V = UndefValue::get(CurTy);
1025 case bitc::CST_CODE_STRING: { // STRING: [values]
1027 return Error("Invalid CST_AGGREGATE record");
1029 const ArrayType *ATy = cast<ArrayType>(CurTy);
1030 const Type *EltTy = ATy->getElementType();
1032 unsigned Size = Record.size();
1033 std::vector<Constant*> Elts;
1034 for (unsigned i = 0; i != Size; ++i)
1035 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1036 V = ConstantArray::get(ATy, Elts);
1039 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1041 return Error("Invalid CST_AGGREGATE record");
1043 const ArrayType *ATy = cast<ArrayType>(CurTy);
1044 const Type *EltTy = ATy->getElementType();
1046 unsigned Size = Record.size();
1047 std::vector<Constant*> Elts;
1048 for (unsigned i = 0; i != Size; ++i)
1049 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1050 Elts.push_back(Constant::getNullValue(EltTy));
1051 V = ConstantArray::get(ATy, Elts);
1054 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1055 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1056 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1058 V = UndefValue::get(CurTy); // Unknown binop.
1060 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1061 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1063 if (Record.size() >= 4) {
1064 if (Opc == Instruction::Add ||
1065 Opc == Instruction::Sub ||
1066 Opc == Instruction::Mul) {
1067 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1068 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1069 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1070 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1071 } else if (Opc == Instruction::SDiv) {
1072 if (Record[3] & (1 << bitc::SDIV_EXACT))
1073 Flags |= SDivOperator::IsExact;
1076 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1080 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1081 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1082 int Opc = GetDecodedCastOpcode(Record[0]);
1084 V = UndefValue::get(CurTy); // Unknown cast.
1086 const Type *OpTy = getTypeByID(Record[1]);
1087 if (!OpTy) return Error("Invalid CE_CAST record");
1088 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1089 V = ConstantExpr::getCast(Opc, Op, CurTy);
1093 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1094 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1095 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1096 SmallVector<Constant*, 16> Elts;
1097 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1098 const Type *ElTy = getTypeByID(Record[i]);
1099 if (!ElTy) return Error("Invalid CE_GEP record");
1100 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1102 if (BitCode == bitc::CST_CODE_CE_INBOUNDS_GEP)
1103 V = ConstantExpr::getInBoundsGetElementPtr(Elts[0], &Elts[1],
1106 V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1],
1110 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1111 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1112 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1113 Type::getInt1Ty(Context)),
1114 ValueList.getConstantFwdRef(Record[1],CurTy),
1115 ValueList.getConstantFwdRef(Record[2],CurTy));
1117 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1118 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1119 const VectorType *OpTy =
1120 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1121 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1122 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1123 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1124 V = ConstantExpr::getExtractElement(Op0, Op1);
1127 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1128 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1129 if (Record.size() < 3 || OpTy == 0)
1130 return Error("Invalid CE_INSERTELT record");
1131 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1132 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1133 OpTy->getElementType());
1134 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1135 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1138 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1139 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1140 if (Record.size() < 3 || OpTy == 0)
1141 return Error("Invalid CE_SHUFFLEVEC record");
1142 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1143 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1144 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1145 OpTy->getNumElements());
1146 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1147 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1150 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1151 const VectorType *RTy = dyn_cast<VectorType>(CurTy);
1152 const VectorType *OpTy = dyn_cast<VectorType>(getTypeByID(Record[0]));
1153 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1154 return Error("Invalid CE_SHUFVEC_EX record");
1155 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1156 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1157 const Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1158 RTy->getNumElements());
1159 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1160 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1163 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1164 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1165 const Type *OpTy = getTypeByID(Record[0]);
1166 if (OpTy == 0) return Error("Invalid CE_CMP record");
1167 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1168 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1170 if (OpTy->isFPOrFPVector())
1171 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1173 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1176 case bitc::CST_CODE_INLINEASM: {
1177 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1178 std::string AsmStr, ConstrStr;
1179 bool HasSideEffects = Record[0] & 1;
1180 bool IsAlignStack = Record[0] >> 1;
1181 unsigned AsmStrSize = Record[1];
1182 if (2+AsmStrSize >= Record.size())
1183 return Error("Invalid INLINEASM record");
1184 unsigned ConstStrSize = Record[2+AsmStrSize];
1185 if (3+AsmStrSize+ConstStrSize > Record.size())
1186 return Error("Invalid INLINEASM record");
1188 for (unsigned i = 0; i != AsmStrSize; ++i)
1189 AsmStr += (char)Record[2+i];
1190 for (unsigned i = 0; i != ConstStrSize; ++i)
1191 ConstrStr += (char)Record[3+AsmStrSize+i];
1192 const PointerType *PTy = cast<PointerType>(CurTy);
1193 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1194 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1197 case bitc::CST_CODE_BLOCKADDRESS:{
1198 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1199 const Type *FnTy = getTypeByID(Record[0]);
1200 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1202 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1203 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1205 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1206 Type::getInt8Ty(Context),
1207 false, GlobalValue::InternalLinkage,
1209 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1215 ValueList.AssignValue(V, NextCstNo);
1219 if (NextCstNo != ValueList.size())
1220 return Error("Invalid constant reference!");
1222 if (Stream.ReadBlockEnd())
1223 return Error("Error at end of constants block");
1225 // Once all the constants have been read, go through and resolve forward
1227 ValueList.ResolveConstantForwardRefs();
1231 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1232 /// remember where it is and then skip it. This lets us lazily deserialize the
1234 bool BitcodeReader::RememberAndSkipFunctionBody() {
1235 // Get the function we are talking about.
1236 if (FunctionsWithBodies.empty())
1237 return Error("Insufficient function protos");
1239 Function *Fn = FunctionsWithBodies.back();
1240 FunctionsWithBodies.pop_back();
1242 // Save the current stream state.
1243 uint64_t CurBit = Stream.GetCurrentBitNo();
1244 DeferredFunctionInfo[Fn] = std::make_pair(CurBit, Fn->getLinkage());
1246 // Set the functions linkage to GhostLinkage so we know it is lazily
1248 Fn->setLinkage(GlobalValue::GhostLinkage);
1250 // Skip over the function block for now.
1251 if (Stream.SkipBlock())
1252 return Error("Malformed block record");
1256 bool BitcodeReader::ParseModule(const std::string &ModuleID) {
1257 // Reject multiple MODULE_BLOCK's in a single bitstream.
1259 return Error("Multiple MODULE_BLOCKs in same stream");
1261 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1262 return Error("Malformed block record");
1264 // Otherwise, create the module.
1265 TheModule = new Module(ModuleID, Context);
1267 SmallVector<uint64_t, 64> Record;
1268 std::vector<std::string> SectionTable;
1269 std::vector<std::string> GCTable;
1271 // Read all the records for this module.
1272 while (!Stream.AtEndOfStream()) {
1273 unsigned Code = Stream.ReadCode();
1274 if (Code == bitc::END_BLOCK) {
1275 if (Stream.ReadBlockEnd())
1276 return Error("Error at end of module block");
1278 // Patch the initializers for globals and aliases up.
1279 ResolveGlobalAndAliasInits();
1280 if (!GlobalInits.empty() || !AliasInits.empty())
1281 return Error("Malformed global initializer set");
1282 if (!FunctionsWithBodies.empty())
1283 return Error("Too few function bodies found");
1285 // Look for intrinsic functions which need to be upgraded at some point
1286 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1289 if (UpgradeIntrinsicFunction(FI, NewFn))
1290 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1293 // Force deallocation of memory for these vectors to favor the client that
1294 // want lazy deserialization.
1295 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1296 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1297 std::vector<Function*>().swap(FunctionsWithBodies);
1301 if (Code == bitc::ENTER_SUBBLOCK) {
1302 switch (Stream.ReadSubBlockID()) {
1303 default: // Skip unknown content.
1304 if (Stream.SkipBlock())
1305 return Error("Malformed block record");
1307 case bitc::BLOCKINFO_BLOCK_ID:
1308 if (Stream.ReadBlockInfoBlock())
1309 return Error("Malformed BlockInfoBlock");
1311 case bitc::PARAMATTR_BLOCK_ID:
1312 if (ParseAttributeBlock())
1315 case bitc::TYPE_BLOCK_ID:
1316 if (ParseTypeTable())
1319 case bitc::TYPE_SYMTAB_BLOCK_ID:
1320 if (ParseTypeSymbolTable())
1323 case bitc::VALUE_SYMTAB_BLOCK_ID:
1324 if (ParseValueSymbolTable())
1327 case bitc::CONSTANTS_BLOCK_ID:
1328 if (ParseConstants() || ResolveGlobalAndAliasInits())
1331 case bitc::METADATA_BLOCK_ID:
1332 if (ParseMetadata())
1335 case bitc::FUNCTION_BLOCK_ID:
1336 // If this is the first function body we've seen, reverse the
1337 // FunctionsWithBodies list.
1338 if (!HasReversedFunctionsWithBodies) {
1339 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1340 HasReversedFunctionsWithBodies = true;
1343 if (RememberAndSkipFunctionBody())
1350 if (Code == bitc::DEFINE_ABBREV) {
1351 Stream.ReadAbbrevRecord();
1356 switch (Stream.ReadRecord(Code, Record)) {
1357 default: break; // Default behavior, ignore unknown content.
1358 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1359 if (Record.size() < 1)
1360 return Error("Malformed MODULE_CODE_VERSION");
1361 // Only version #0 is supported so far.
1363 return Error("Unknown bitstream version!");
1365 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1367 if (ConvertToString(Record, 0, S))
1368 return Error("Invalid MODULE_CODE_TRIPLE record");
1369 TheModule->setTargetTriple(S);
1372 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1374 if (ConvertToString(Record, 0, S))
1375 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1376 TheModule->setDataLayout(S);
1379 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1381 if (ConvertToString(Record, 0, S))
1382 return Error("Invalid MODULE_CODE_ASM record");
1383 TheModule->setModuleInlineAsm(S);
1386 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1388 if (ConvertToString(Record, 0, S))
1389 return Error("Invalid MODULE_CODE_DEPLIB record");
1390 TheModule->addLibrary(S);
1393 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1395 if (ConvertToString(Record, 0, S))
1396 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1397 SectionTable.push_back(S);
1400 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1402 if (ConvertToString(Record, 0, S))
1403 return Error("Invalid MODULE_CODE_GCNAME record");
1404 GCTable.push_back(S);
1407 // GLOBALVAR: [pointer type, isconst, initid,
1408 // linkage, alignment, section, visibility, threadlocal]
1409 case bitc::MODULE_CODE_GLOBALVAR: {
1410 if (Record.size() < 6)
1411 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1412 const Type *Ty = getTypeByID(Record[0]);
1413 if (!isa<PointerType>(Ty))
1414 return Error("Global not a pointer type!");
1415 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1416 Ty = cast<PointerType>(Ty)->getElementType();
1418 bool isConstant = Record[1];
1419 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1420 unsigned Alignment = (1 << Record[4]) >> 1;
1421 std::string Section;
1423 if (Record[5]-1 >= SectionTable.size())
1424 return Error("Invalid section ID");
1425 Section = SectionTable[Record[5]-1];
1427 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1428 if (Record.size() > 6)
1429 Visibility = GetDecodedVisibility(Record[6]);
1430 bool isThreadLocal = false;
1431 if (Record.size() > 7)
1432 isThreadLocal = Record[7];
1434 GlobalVariable *NewGV =
1435 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1436 isThreadLocal, AddressSpace);
1437 NewGV->setAlignment(Alignment);
1438 if (!Section.empty())
1439 NewGV->setSection(Section);
1440 NewGV->setVisibility(Visibility);
1441 NewGV->setThreadLocal(isThreadLocal);
1443 ValueList.push_back(NewGV);
1445 // Remember which value to use for the global initializer.
1446 if (unsigned InitID = Record[2])
1447 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1450 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1451 // alignment, section, visibility, gc]
1452 case bitc::MODULE_CODE_FUNCTION: {
1453 if (Record.size() < 8)
1454 return Error("Invalid MODULE_CODE_FUNCTION record");
1455 const Type *Ty = getTypeByID(Record[0]);
1456 if (!isa<PointerType>(Ty))
1457 return Error("Function not a pointer type!");
1458 const FunctionType *FTy =
1459 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1461 return Error("Function not a pointer to function type!");
1463 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1466 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1467 bool isProto = Record[2];
1468 Func->setLinkage(GetDecodedLinkage(Record[3]));
1469 Func->setAttributes(getAttributes(Record[4]));
1471 Func->setAlignment((1 << Record[5]) >> 1);
1473 if (Record[6]-1 >= SectionTable.size())
1474 return Error("Invalid section ID");
1475 Func->setSection(SectionTable[Record[6]-1]);
1477 Func->setVisibility(GetDecodedVisibility(Record[7]));
1478 if (Record.size() > 8 && Record[8]) {
1479 if (Record[8]-1 > GCTable.size())
1480 return Error("Invalid GC ID");
1481 Func->setGC(GCTable[Record[8]-1].c_str());
1483 ValueList.push_back(Func);
1485 // If this is a function with a body, remember the prototype we are
1486 // creating now, so that we can match up the body with them later.
1488 FunctionsWithBodies.push_back(Func);
1491 // ALIAS: [alias type, aliasee val#, linkage]
1492 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1493 case bitc::MODULE_CODE_ALIAS: {
1494 if (Record.size() < 3)
1495 return Error("Invalid MODULE_ALIAS record");
1496 const Type *Ty = getTypeByID(Record[0]);
1497 if (!isa<PointerType>(Ty))
1498 return Error("Function not a pointer type!");
1500 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1502 // Old bitcode files didn't have visibility field.
1503 if (Record.size() > 3)
1504 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1505 ValueList.push_back(NewGA);
1506 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1509 /// MODULE_CODE_PURGEVALS: [numvals]
1510 case bitc::MODULE_CODE_PURGEVALS:
1511 // Trim down the value list to the specified size.
1512 if (Record.size() < 1 || Record[0] > ValueList.size())
1513 return Error("Invalid MODULE_PURGEVALS record");
1514 ValueList.shrinkTo(Record[0]);
1520 return Error("Premature end of bitstream");
1523 bool BitcodeReader::ParseBitcode() {
1526 if (Buffer->getBufferSize() & 3)
1527 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1529 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1530 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1532 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1533 // The magic number is 0x0B17C0DE stored in little endian.
1534 if (isBitcodeWrapper(BufPtr, BufEnd))
1535 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1536 return Error("Invalid bitcode wrapper header");
1538 StreamFile.init(BufPtr, BufEnd);
1539 Stream.init(StreamFile);
1541 // Sniff for the signature.
1542 if (Stream.Read(8) != 'B' ||
1543 Stream.Read(8) != 'C' ||
1544 Stream.Read(4) != 0x0 ||
1545 Stream.Read(4) != 0xC ||
1546 Stream.Read(4) != 0xE ||
1547 Stream.Read(4) != 0xD)
1548 return Error("Invalid bitcode signature");
1550 // We expect a number of well-defined blocks, though we don't necessarily
1551 // need to understand them all.
1552 while (!Stream.AtEndOfStream()) {
1553 unsigned Code = Stream.ReadCode();
1555 if (Code != bitc::ENTER_SUBBLOCK)
1556 return Error("Invalid record at top-level");
1558 unsigned BlockID = Stream.ReadSubBlockID();
1560 // We only know the MODULE subblock ID.
1562 case bitc::BLOCKINFO_BLOCK_ID:
1563 if (Stream.ReadBlockInfoBlock())
1564 return Error("Malformed BlockInfoBlock");
1566 case bitc::MODULE_BLOCK_ID:
1567 if (ParseModule(Buffer->getBufferIdentifier()))
1571 if (Stream.SkipBlock())
1572 return Error("Malformed block record");
1580 /// ParseMetadataAttachment - Parse metadata attachments.
1581 bool BitcodeReader::ParseMetadataAttachment() {
1582 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1583 return Error("Malformed block record");
1585 SmallVector<uint64_t, 64> Record;
1587 unsigned Code = Stream.ReadCode();
1588 if (Code == bitc::END_BLOCK) {
1589 if (Stream.ReadBlockEnd())
1590 return Error("Error at end of PARAMATTR block");
1593 if (Code == bitc::DEFINE_ABBREV) {
1594 Stream.ReadAbbrevRecord();
1597 // Read a metadata attachment record.
1599 switch (Stream.ReadRecord(Code, Record)) {
1600 default: // Default behavior: ignore.
1602 case bitc::METADATA_ATTACHMENT: {
1603 unsigned RecordLength = Record.size();
1604 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1605 return Error ("Invalid METADATA_ATTACHMENT reader!");
1606 Instruction *Inst = InstructionList[Record[0]];
1607 for (unsigned i = 1; i != RecordLength; i = i+2) {
1608 unsigned Kind = Record[i];
1609 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1610 Inst->setMetadata(Kind, cast<MDNode>(Node));
1619 /// ParseFunctionBody - Lazily parse the specified function body block.
1620 bool BitcodeReader::ParseFunctionBody(Function *F) {
1621 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1622 return Error("Malformed block record");
1624 unsigned ModuleValueListSize = ValueList.size();
1626 // Add all the function arguments to the value table.
1627 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1628 ValueList.push_back(I);
1630 unsigned NextValueNo = ValueList.size();
1631 BasicBlock *CurBB = 0;
1632 unsigned CurBBNo = 0;
1634 // Read all the records.
1635 SmallVector<uint64_t, 64> Record;
1637 unsigned Code = Stream.ReadCode();
1638 if (Code == bitc::END_BLOCK) {
1639 if (Stream.ReadBlockEnd())
1640 return Error("Error at end of function block");
1644 if (Code == bitc::ENTER_SUBBLOCK) {
1645 switch (Stream.ReadSubBlockID()) {
1646 default: // Skip unknown content.
1647 if (Stream.SkipBlock())
1648 return Error("Malformed block record");
1650 case bitc::CONSTANTS_BLOCK_ID:
1651 if (ParseConstants()) return true;
1652 NextValueNo = ValueList.size();
1654 case bitc::VALUE_SYMTAB_BLOCK_ID:
1655 if (ParseValueSymbolTable()) return true;
1657 case bitc::METADATA_ATTACHMENT_ID:
1658 if (ParseMetadataAttachment()) return true;
1660 case bitc::METADATA_BLOCK_ID:
1661 if (ParseMetadata()) return true;
1667 if (Code == bitc::DEFINE_ABBREV) {
1668 Stream.ReadAbbrevRecord();
1675 unsigned BitCode = Stream.ReadRecord(Code, Record);
1677 default: // Default behavior: reject
1678 return Error("Unknown instruction");
1679 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1680 if (Record.size() < 1 || Record[0] == 0)
1681 return Error("Invalid DECLAREBLOCKS record");
1682 // Create all the basic blocks for the function.
1683 FunctionBBs.resize(Record[0]);
1684 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1685 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1686 CurBB = FunctionBBs[0];
1689 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1692 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1693 getValue(Record, OpNum, LHS->getType(), RHS) ||
1694 OpNum+1 > Record.size())
1695 return Error("Invalid BINOP record");
1697 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
1698 if (Opc == -1) return Error("Invalid BINOP record");
1699 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
1700 InstructionList.push_back(I);
1701 if (OpNum < Record.size()) {
1702 if (Opc == Instruction::Add ||
1703 Opc == Instruction::Sub ||
1704 Opc == Instruction::Mul) {
1705 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1706 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
1707 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1708 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
1709 } else if (Opc == Instruction::SDiv) {
1710 if (Record[OpNum] & (1 << bitc::SDIV_EXACT))
1711 cast<BinaryOperator>(I)->setIsExact(true);
1716 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
1719 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1720 OpNum+2 != Record.size())
1721 return Error("Invalid CAST record");
1723 const Type *ResTy = getTypeByID(Record[OpNum]);
1724 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
1725 if (Opc == -1 || ResTy == 0)
1726 return Error("Invalid CAST record");
1727 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
1728 InstructionList.push_back(I);
1731 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
1732 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
1735 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
1736 return Error("Invalid GEP record");
1738 SmallVector<Value*, 16> GEPIdx;
1739 while (OpNum != Record.size()) {
1741 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1742 return Error("Invalid GEP record");
1743 GEPIdx.push_back(Op);
1746 I = GetElementPtrInst::Create(BasePtr, GEPIdx.begin(), GEPIdx.end());
1747 InstructionList.push_back(I);
1748 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
1749 cast<GetElementPtrInst>(I)->setIsInBounds(true);
1753 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
1754 // EXTRACTVAL: [opty, opval, n x indices]
1757 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1758 return Error("Invalid EXTRACTVAL record");
1760 SmallVector<unsigned, 4> EXTRACTVALIdx;
1761 for (unsigned RecSize = Record.size();
1762 OpNum != RecSize; ++OpNum) {
1763 uint64_t Index = Record[OpNum];
1764 if ((unsigned)Index != Index)
1765 return Error("Invalid EXTRACTVAL index");
1766 EXTRACTVALIdx.push_back((unsigned)Index);
1769 I = ExtractValueInst::Create(Agg,
1770 EXTRACTVALIdx.begin(), EXTRACTVALIdx.end());
1771 InstructionList.push_back(I);
1775 case bitc::FUNC_CODE_INST_INSERTVAL: {
1776 // INSERTVAL: [opty, opval, opty, opval, n x indices]
1779 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
1780 return Error("Invalid INSERTVAL record");
1782 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
1783 return Error("Invalid INSERTVAL record");
1785 SmallVector<unsigned, 4> INSERTVALIdx;
1786 for (unsigned RecSize = Record.size();
1787 OpNum != RecSize; ++OpNum) {
1788 uint64_t Index = Record[OpNum];
1789 if ((unsigned)Index != Index)
1790 return Error("Invalid INSERTVAL index");
1791 INSERTVALIdx.push_back((unsigned)Index);
1794 I = InsertValueInst::Create(Agg, Val,
1795 INSERTVALIdx.begin(), INSERTVALIdx.end());
1796 InstructionList.push_back(I);
1800 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
1801 // obsolete form of select
1802 // handles select i1 ... in old bitcode
1804 Value *TrueVal, *FalseVal, *Cond;
1805 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
1806 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
1807 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
1808 return Error("Invalid SELECT record");
1810 I = SelectInst::Create(Cond, TrueVal, FalseVal);
1811 InstructionList.push_back(I);
1815 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
1816 // new form of select
1817 // handles select i1 or select [N x i1]
1819 Value *TrueVal, *FalseVal, *Cond;
1820 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
1821 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
1822 getValueTypePair(Record, OpNum, NextValueNo, Cond))
1823 return Error("Invalid SELECT record");
1825 // select condition can be either i1 or [N x i1]
1826 if (const VectorType* vector_type =
1827 dyn_cast<const VectorType>(Cond->getType())) {
1829 if (vector_type->getElementType() != Type::getInt1Ty(Context))
1830 return Error("Invalid SELECT condition type");
1833 if (Cond->getType() != Type::getInt1Ty(Context))
1834 return Error("Invalid SELECT condition type");
1837 I = SelectInst::Create(Cond, TrueVal, FalseVal);
1838 InstructionList.push_back(I);
1842 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
1845 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
1846 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
1847 return Error("Invalid EXTRACTELT record");
1848 I = ExtractElementInst::Create(Vec, Idx);
1849 InstructionList.push_back(I);
1853 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
1855 Value *Vec, *Elt, *Idx;
1856 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
1857 getValue(Record, OpNum,
1858 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
1859 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
1860 return Error("Invalid INSERTELT record");
1861 I = InsertElementInst::Create(Vec, Elt, Idx);
1862 InstructionList.push_back(I);
1866 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
1868 Value *Vec1, *Vec2, *Mask;
1869 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
1870 getValue(Record, OpNum, Vec1->getType(), Vec2))
1871 return Error("Invalid SHUFFLEVEC record");
1873 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
1874 return Error("Invalid SHUFFLEVEC record");
1875 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
1876 InstructionList.push_back(I);
1880 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
1881 // Old form of ICmp/FCmp returning bool
1882 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
1883 // both legal on vectors but had different behaviour.
1884 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
1885 // FCmp/ICmp returning bool or vector of bool
1889 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1890 getValue(Record, OpNum, LHS->getType(), RHS) ||
1891 OpNum+1 != Record.size())
1892 return Error("Invalid CMP record");
1894 if (LHS->getType()->isFPOrFPVector())
1895 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
1897 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
1898 InstructionList.push_back(I);
1902 case bitc::FUNC_CODE_INST_GETRESULT: { // GETRESULT: [ty, val, n]
1903 if (Record.size() != 2)
1904 return Error("Invalid GETRESULT record");
1907 getValueTypePair(Record, OpNum, NextValueNo, Op);
1908 unsigned Index = Record[1];
1909 I = ExtractValueInst::Create(Op, Index);
1910 InstructionList.push_back(I);
1914 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
1916 unsigned Size = Record.size();
1918 I = ReturnInst::Create(Context);
1919 InstructionList.push_back(I);
1924 SmallVector<Value *,4> Vs;
1927 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1928 return Error("Invalid RET record");
1930 } while(OpNum != Record.size());
1932 const Type *ReturnType = F->getReturnType();
1933 if (Vs.size() > 1 ||
1934 (isa<StructType>(ReturnType) &&
1935 (Vs.empty() || Vs[0]->getType() != ReturnType))) {
1936 Value *RV = UndefValue::get(ReturnType);
1937 for (unsigned i = 0, e = Vs.size(); i != e; ++i) {
1938 I = InsertValueInst::Create(RV, Vs[i], i, "mrv");
1939 InstructionList.push_back(I);
1940 CurBB->getInstList().push_back(I);
1941 ValueList.AssignValue(I, NextValueNo++);
1944 I = ReturnInst::Create(Context, RV);
1945 InstructionList.push_back(I);
1949 I = ReturnInst::Create(Context, Vs[0]);
1950 InstructionList.push_back(I);
1953 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
1954 if (Record.size() != 1 && Record.size() != 3)
1955 return Error("Invalid BR record");
1956 BasicBlock *TrueDest = getBasicBlock(Record[0]);
1958 return Error("Invalid BR record");
1960 if (Record.size() == 1) {
1961 I = BranchInst::Create(TrueDest);
1962 InstructionList.push_back(I);
1965 BasicBlock *FalseDest = getBasicBlock(Record[1]);
1966 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
1967 if (FalseDest == 0 || Cond == 0)
1968 return Error("Invalid BR record");
1969 I = BranchInst::Create(TrueDest, FalseDest, Cond);
1970 InstructionList.push_back(I);
1974 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
1975 if (Record.size() < 3 || (Record.size() & 1) == 0)
1976 return Error("Invalid SWITCH record");
1977 const Type *OpTy = getTypeByID(Record[0]);
1978 Value *Cond = getFnValueByID(Record[1], OpTy);
1979 BasicBlock *Default = getBasicBlock(Record[2]);
1980 if (OpTy == 0 || Cond == 0 || Default == 0)
1981 return Error("Invalid SWITCH record");
1982 unsigned NumCases = (Record.size()-3)/2;
1983 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
1984 InstructionList.push_back(SI);
1985 for (unsigned i = 0, e = NumCases; i != e; ++i) {
1986 ConstantInt *CaseVal =
1987 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
1988 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
1989 if (CaseVal == 0 || DestBB == 0) {
1991 return Error("Invalid SWITCH record!");
1993 SI->addCase(CaseVal, DestBB);
1998 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
1999 if (Record.size() < 2)
2000 return Error("Invalid INDIRECTBR record");
2001 const Type *OpTy = getTypeByID(Record[0]);
2002 Value *Address = getFnValueByID(Record[1], OpTy);
2003 if (OpTy == 0 || Address == 0)
2004 return Error("Invalid INDIRECTBR record");
2005 unsigned NumDests = Record.size()-2;
2006 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2007 InstructionList.push_back(IBI);
2008 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2009 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2010 IBI->addDestination(DestBB);
2013 return Error("Invalid INDIRECTBR record!");
2020 case bitc::FUNC_CODE_INST_INVOKE: {
2021 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2022 if (Record.size() < 4) return Error("Invalid INVOKE record");
2023 AttrListPtr PAL = getAttributes(Record[0]);
2024 unsigned CCInfo = Record[1];
2025 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2026 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2030 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2031 return Error("Invalid INVOKE record");
2033 const PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2034 const FunctionType *FTy = !CalleeTy ? 0 :
2035 dyn_cast<FunctionType>(CalleeTy->getElementType());
2037 // Check that the right number of fixed parameters are here.
2038 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2039 Record.size() < OpNum+FTy->getNumParams())
2040 return Error("Invalid INVOKE record");
2042 SmallVector<Value*, 16> Ops;
2043 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2044 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2045 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2048 if (!FTy->isVarArg()) {
2049 if (Record.size() != OpNum)
2050 return Error("Invalid INVOKE record");
2052 // Read type/value pairs for varargs params.
2053 while (OpNum != Record.size()) {
2055 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2056 return Error("Invalid INVOKE record");
2061 I = InvokeInst::Create(Callee, NormalBB, UnwindBB,
2062 Ops.begin(), Ops.end());
2063 InstructionList.push_back(I);
2064 cast<InvokeInst>(I)->setCallingConv(
2065 static_cast<CallingConv::ID>(CCInfo));
2066 cast<InvokeInst>(I)->setAttributes(PAL);
2069 case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
2070 I = new UnwindInst(Context);
2071 InstructionList.push_back(I);
2073 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2074 I = new UnreachableInst(Context);
2075 InstructionList.push_back(I);
2077 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2078 if (Record.size() < 1 || ((Record.size()-1)&1))
2079 return Error("Invalid PHI record");
2080 const Type *Ty = getTypeByID(Record[0]);
2081 if (!Ty) return Error("Invalid PHI record");
2083 PHINode *PN = PHINode::Create(Ty);
2084 InstructionList.push_back(PN);
2085 PN->reserveOperandSpace((Record.size()-1)/2);
2087 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2088 Value *V = getFnValueByID(Record[1+i], Ty);
2089 BasicBlock *BB = getBasicBlock(Record[2+i]);
2090 if (!V || !BB) return Error("Invalid PHI record");
2091 PN->addIncoming(V, BB);
2097 case bitc::FUNC_CODE_INST_MALLOC: { // MALLOC: [instty, op, align]
2098 // Autoupgrade malloc instruction to malloc call.
2099 // FIXME: Remove in LLVM 3.0.
2100 if (Record.size() < 3)
2101 return Error("Invalid MALLOC record");
2102 const PointerType *Ty =
2103 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2104 Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
2105 if (!Ty || !Size) return Error("Invalid MALLOC record");
2106 if (!CurBB) return Error("Invalid malloc instruction with no BB");
2107 const Type *Int32Ty = IntegerType::getInt32Ty(CurBB->getContext());
2108 Constant *AllocSize = ConstantExpr::getSizeOf(Ty->getElementType());
2109 AllocSize = ConstantExpr::getTruncOrBitCast(AllocSize, Int32Ty);
2110 I = CallInst::CreateMalloc(CurBB, Int32Ty, Ty->getElementType(),
2111 AllocSize, Size, NULL);
2112 InstructionList.push_back(I);
2115 case bitc::FUNC_CODE_INST_FREE: { // FREE: [op, opty]
2118 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2119 OpNum != Record.size())
2120 return Error("Invalid FREE record");
2121 if (!CurBB) return Error("Invalid free instruction with no BB");
2122 I = CallInst::CreateFree(Op, CurBB);
2123 InstructionList.push_back(I);
2126 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, op, align]
2127 if (Record.size() < 3)
2128 return Error("Invalid ALLOCA record");
2129 const PointerType *Ty =
2130 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2131 Value *Size = getFnValueByID(Record[1], Type::getInt32Ty(Context));
2132 unsigned Align = Record[2];
2133 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2134 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2135 InstructionList.push_back(I);
2138 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2141 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2142 OpNum+2 != Record.size())
2143 return Error("Invalid LOAD record");
2145 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2146 InstructionList.push_back(I);
2149 case bitc::FUNC_CODE_INST_STORE2: { // STORE2:[ptrty, ptr, val, align, vol]
2152 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2153 getValue(Record, OpNum,
2154 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2155 OpNum+2 != Record.size())
2156 return Error("Invalid STORE record");
2158 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2159 InstructionList.push_back(I);
2162 case bitc::FUNC_CODE_INST_STORE: { // STORE:[val, valty, ptr, align, vol]
2163 // FIXME: Legacy form of store instruction. Should be removed in LLVM 3.0.
2166 if (getValueTypePair(Record, OpNum, NextValueNo, Val) ||
2167 getValue(Record, OpNum,
2168 PointerType::getUnqual(Val->getType()), Ptr)||
2169 OpNum+2 != Record.size())
2170 return Error("Invalid STORE record");
2172 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2173 InstructionList.push_back(I);
2176 case bitc::FUNC_CODE_INST_CALL: {
2177 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2178 if (Record.size() < 3)
2179 return Error("Invalid CALL record");
2181 AttrListPtr PAL = getAttributes(Record[0]);
2182 unsigned CCInfo = Record[1];
2186 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2187 return Error("Invalid CALL record");
2189 const PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2190 const FunctionType *FTy = 0;
2191 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2192 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2193 return Error("Invalid CALL record");
2195 SmallVector<Value*, 16> Args;
2196 // Read the fixed params.
2197 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2198 if (FTy->getParamType(i)->getTypeID()==Type::LabelTyID)
2199 Args.push_back(getBasicBlock(Record[OpNum]));
2201 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2202 if (Args.back() == 0) return Error("Invalid CALL record");
2205 // Read type/value pairs for varargs params.
2206 if (!FTy->isVarArg()) {
2207 if (OpNum != Record.size())
2208 return Error("Invalid CALL record");
2210 while (OpNum != Record.size()) {
2212 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2213 return Error("Invalid CALL record");
2218 I = CallInst::Create(Callee, Args.begin(), Args.end());
2219 InstructionList.push_back(I);
2220 cast<CallInst>(I)->setCallingConv(
2221 static_cast<CallingConv::ID>(CCInfo>>1));
2222 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2223 cast<CallInst>(I)->setAttributes(PAL);
2226 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2227 if (Record.size() < 3)
2228 return Error("Invalid VAARG record");
2229 const Type *OpTy = getTypeByID(Record[0]);
2230 Value *Op = getFnValueByID(Record[1], OpTy);
2231 const Type *ResTy = getTypeByID(Record[2]);
2232 if (!OpTy || !Op || !ResTy)
2233 return Error("Invalid VAARG record");
2234 I = new VAArgInst(Op, ResTy);
2235 InstructionList.push_back(I);
2240 // Add instruction to end of current BB. If there is no current BB, reject
2244 return Error("Invalid instruction with no BB");
2246 CurBB->getInstList().push_back(I);
2248 // If this was a terminator instruction, move to the next block.
2249 if (isa<TerminatorInst>(I)) {
2251 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2254 // Non-void values get registered in the value table for future use.
2255 if (I && !I->getType()->isVoidTy())
2256 ValueList.AssignValue(I, NextValueNo++);
2259 // Check the function list for unresolved values.
2260 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2261 if (A->getParent() == 0) {
2262 // We found at least one unresolved value. Nuke them all to avoid leaks.
2263 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2264 if ((A = dyn_cast<Argument>(ValueList.back())) && A->getParent() == 0) {
2265 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2269 return Error("Never resolved value found in function!");
2273 // See if anything took the address of blocks in this function. If so,
2274 // resolve them now.
2275 /// BlockAddrFwdRefs - These are blockaddr references to basic blocks. These
2276 /// are resolved lazily when functions are loaded.
2277 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2278 BlockAddrFwdRefs.find(F);
2279 if (BAFRI != BlockAddrFwdRefs.end()) {
2280 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2281 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2282 unsigned BlockIdx = RefList[i].first;
2283 if (BlockIdx >= FunctionBBs.size())
2284 return Error("Invalid blockaddress block #");
2286 GlobalVariable *FwdRef = RefList[i].second;
2287 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2288 FwdRef->eraseFromParent();
2291 BlockAddrFwdRefs.erase(BAFRI);
2294 // Trim the value list down to the size it was before we parsed this function.
2295 ValueList.shrinkTo(ModuleValueListSize);
2296 std::vector<BasicBlock*>().swap(FunctionBBs);
2301 //===----------------------------------------------------------------------===//
2302 // ModuleProvider implementation
2303 //===----------------------------------------------------------------------===//
2306 bool BitcodeReader::materializeFunction(Function *F, std::string *ErrInfo) {
2307 // If it already is material, ignore the request.
2308 if (!F->hasNotBeenReadFromBitcode()) return false;
2310 DenseMap<Function*, std::pair<uint64_t, unsigned> >::iterator DFII =
2311 DeferredFunctionInfo.find(F);
2312 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2314 // Move the bit stream to the saved position of the deferred function body and
2315 // restore the real linkage type for the function.
2316 Stream.JumpToBit(DFII->second.first);
2317 F->setLinkage((GlobalValue::LinkageTypes)DFII->second.second);
2319 if (ParseFunctionBody(F)) {
2320 if (ErrInfo) *ErrInfo = ErrorString;
2324 // Upgrade any old intrinsic calls in the function.
2325 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2326 E = UpgradedIntrinsics.end(); I != E; ++I) {
2327 if (I->first != I->second) {
2328 for (Value::use_iterator UI = I->first->use_begin(),
2329 UE = I->first->use_end(); UI != UE; ) {
2330 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2331 UpgradeIntrinsicCall(CI, I->second);
2339 void BitcodeReader::dematerializeFunction(Function *F) {
2340 // If this function isn't materialized, or if it is a proto, this is a noop.
2341 if (F->hasNotBeenReadFromBitcode() || F->isDeclaration())
2344 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2346 // Just forget the function body, we can remat it later.
2348 F->setLinkage(GlobalValue::GhostLinkage);
2352 Module *BitcodeReader::materializeModule(std::string *ErrInfo) {
2353 // Iterate over the module, deserializing any functions that are still on
2355 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2357 if (F->hasNotBeenReadFromBitcode() &&
2358 materializeFunction(F, ErrInfo))
2361 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2362 // delete the old functions to clean up. We can't do this unless the entire
2363 // module is materialized because there could always be another function body
2364 // with calls to the old function.
2365 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2366 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2367 if (I->first != I->second) {
2368 for (Value::use_iterator UI = I->first->use_begin(),
2369 UE = I->first->use_end(); UI != UE; ) {
2370 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2371 UpgradeIntrinsicCall(CI, I->second);
2373 if (!I->first->use_empty())
2374 I->first->replaceAllUsesWith(I->second);
2375 I->first->eraseFromParent();
2378 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2380 // Check debug info intrinsics.
2381 CheckDebugInfoIntrinsics(TheModule);
2387 /// This method is provided by the parent ModuleProvde class and overriden
2388 /// here. It simply releases the module from its provided and frees up our
2390 /// @brief Release our hold on the generated module
2391 Module *BitcodeReader::releaseModule(std::string *ErrInfo) {
2392 // Since we're losing control of this Module, we must hand it back complete
2393 Module *M = ModuleProvider::releaseModule(ErrInfo);
2399 //===----------------------------------------------------------------------===//
2400 // External interface
2401 //===----------------------------------------------------------------------===//
2403 /// getBitcodeModuleProvider - lazy function-at-a-time loading from a file.
2405 ModuleProvider *llvm::getBitcodeModuleProvider(MemoryBuffer *Buffer,
2406 LLVMContext& Context,
2407 std::string *ErrMsg) {
2408 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2409 if (R->ParseBitcode()) {
2411 *ErrMsg = R->getErrorString();
2413 // Don't let the BitcodeReader dtor delete 'Buffer'.
2414 R->releaseMemoryBuffer();
2421 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2422 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2423 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2424 std::string *ErrMsg){
2426 R = static_cast<BitcodeReader*>(getBitcodeModuleProvider(Buffer, Context,
2430 // Read in the entire module.
2431 Module *M = R->materializeModule(ErrMsg);
2433 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2434 // there was an error.
2435 R->releaseMemoryBuffer();
2437 // If there was no error, tell ModuleProvider not to delete it when its dtor
2440 M = R->releaseModule(ErrMsg);