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<Type*>().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, 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(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, 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);
296 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
297 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
298 } else if (isa<ConstantVector>(UserC)) {
299 NewC = ConstantVector::get(NewOps);
301 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
302 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
305 UserC->replaceAllUsesWith(NewC);
306 UserC->destroyConstant();
310 // Update all ValueHandles, they should be the only users at this point.
311 Placeholder->replaceAllUsesWith(RealVal);
316 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
325 WeakVH &OldV = MDValuePtrs[Idx];
331 // If there was a forward reference to this value, replace it.
332 MDNode *PrevVal = cast<MDNode>(OldV);
333 OldV->replaceAllUsesWith(V);
334 MDNode::deleteTemporary(PrevVal);
335 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
337 MDValuePtrs[Idx] = V;
340 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
344 if (Value *V = MDValuePtrs[Idx]) {
345 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
349 // Create and return a placeholder, which will later be RAUW'd.
350 Value *V = MDNode::getTemporary(Context, ArrayRef<Value*>());
351 MDValuePtrs[Idx] = V;
355 Type *BitcodeReader::getTypeByID(unsigned ID) {
356 // The type table size is always specified correctly.
357 if (ID >= TypeList.size())
360 if (Type *Ty = TypeList[ID])
363 // If we have a forward reference, the only possible case is when it is to a
364 // named struct. Just create a placeholder for now.
365 return TypeList[ID] = StructType::createNamed(Context, "");
368 /// FIXME: Remove in LLVM 3.1, only used by ParseOldTypeTable.
369 Type *BitcodeReader::getTypeByIDOrNull(unsigned ID) {
370 if (ID >= TypeList.size())
371 TypeList.resize(ID+1);
377 //===----------------------------------------------------------------------===//
378 // Functions for parsing blocks from the bitcode file
379 //===----------------------------------------------------------------------===//
381 bool BitcodeReader::ParseAttributeBlock() {
382 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
383 return Error("Malformed block record");
385 if (!MAttributes.empty())
386 return Error("Multiple PARAMATTR blocks found!");
388 SmallVector<uint64_t, 64> Record;
390 SmallVector<AttributeWithIndex, 8> Attrs;
392 // Read all the records.
394 unsigned Code = Stream.ReadCode();
395 if (Code == bitc::END_BLOCK) {
396 if (Stream.ReadBlockEnd())
397 return Error("Error at end of PARAMATTR block");
401 if (Code == bitc::ENTER_SUBBLOCK) {
402 // No known subblocks, always skip them.
403 Stream.ReadSubBlockID();
404 if (Stream.SkipBlock())
405 return Error("Malformed block record");
409 if (Code == bitc::DEFINE_ABBREV) {
410 Stream.ReadAbbrevRecord();
416 switch (Stream.ReadRecord(Code, Record)) {
417 default: // Default behavior: ignore.
419 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
420 if (Record.size() & 1)
421 return Error("Invalid ENTRY record");
423 // FIXME : Remove this autoupgrade code in LLVM 3.0.
424 // If Function attributes are using index 0 then transfer them
425 // to index ~0. Index 0 is used for return value attributes but used to be
426 // used for function attributes.
427 Attributes RetAttribute = Attribute::None;
428 Attributes FnAttribute = Attribute::None;
429 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
430 // FIXME: remove in LLVM 3.0
431 // The alignment is stored as a 16-bit raw value from bits 31--16.
432 // We shift the bits above 31 down by 11 bits.
434 unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
435 if (Alignment && !isPowerOf2_32(Alignment))
436 return Error("Alignment is not a power of two.");
438 Attributes ReconstitutedAttr = Record[i+1] & 0xffff;
440 ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
441 ReconstitutedAttr |= (Record[i+1] & (0xffffull << 32)) >> 11;
442 Record[i+1] = ReconstitutedAttr;
445 RetAttribute = Record[i+1];
446 else if (Record[i] == ~0U)
447 FnAttribute = Record[i+1];
450 unsigned OldRetAttrs = (Attribute::NoUnwind|Attribute::NoReturn|
451 Attribute::ReadOnly|Attribute::ReadNone);
453 if (FnAttribute == Attribute::None && RetAttribute != Attribute::None &&
454 (RetAttribute & OldRetAttrs) != 0) {
455 if (FnAttribute == Attribute::None) { // add a slot so they get added.
456 Record.push_back(~0U);
460 FnAttribute |= RetAttribute & OldRetAttrs;
461 RetAttribute &= ~OldRetAttrs;
464 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
465 if (Record[i] == 0) {
466 if (RetAttribute != Attribute::None)
467 Attrs.push_back(AttributeWithIndex::get(0, RetAttribute));
468 } else if (Record[i] == ~0U) {
469 if (FnAttribute != Attribute::None)
470 Attrs.push_back(AttributeWithIndex::get(~0U, FnAttribute));
471 } else if (Record[i+1] != Attribute::None)
472 Attrs.push_back(AttributeWithIndex::get(Record[i], Record[i+1]));
475 MAttributes.push_back(AttrListPtr::get(Attrs.begin(), Attrs.end()));
483 bool BitcodeReader::ParseTypeTable() {
484 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
485 return Error("Malformed block record");
487 return ParseTypeTableBody();
490 bool BitcodeReader::ParseTypeTableBody() {
491 if (!TypeList.empty())
492 return Error("Multiple TYPE_BLOCKs found!");
494 SmallVector<uint64_t, 64> Record;
495 unsigned NumRecords = 0;
497 SmallString<64> TypeName;
499 // Read all the records for this type table.
501 unsigned Code = Stream.ReadCode();
502 if (Code == bitc::END_BLOCK) {
503 if (NumRecords != TypeList.size())
504 return Error("Invalid type forward reference in TYPE_BLOCK");
505 if (Stream.ReadBlockEnd())
506 return Error("Error at end of type table block");
510 if (Code == bitc::ENTER_SUBBLOCK) {
511 // No known subblocks, always skip them.
512 Stream.ReadSubBlockID();
513 if (Stream.SkipBlock())
514 return Error("Malformed block record");
518 if (Code == bitc::DEFINE_ABBREV) {
519 Stream.ReadAbbrevRecord();
526 switch (Stream.ReadRecord(Code, Record)) {
527 default: return Error("unknown type in type table");
528 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
529 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
530 // type list. This allows us to reserve space.
531 if (Record.size() < 1)
532 return Error("Invalid TYPE_CODE_NUMENTRY record");
533 TypeList.resize(Record[0]);
535 case bitc::TYPE_CODE_VOID: // VOID
536 ResultTy = Type::getVoidTy(Context);
538 case bitc::TYPE_CODE_FLOAT: // FLOAT
539 ResultTy = Type::getFloatTy(Context);
541 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
542 ResultTy = Type::getDoubleTy(Context);
544 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
545 ResultTy = Type::getX86_FP80Ty(Context);
547 case bitc::TYPE_CODE_FP128: // FP128
548 ResultTy = Type::getFP128Ty(Context);
550 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
551 ResultTy = Type::getPPC_FP128Ty(Context);
553 case bitc::TYPE_CODE_LABEL: // LABEL
554 ResultTy = Type::getLabelTy(Context);
556 case bitc::TYPE_CODE_METADATA: // METADATA
557 ResultTy = Type::getMetadataTy(Context);
559 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
560 ResultTy = Type::getX86_MMXTy(Context);
562 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
563 if (Record.size() < 1)
564 return Error("Invalid Integer type record");
566 ResultTy = IntegerType::get(Context, Record[0]);
568 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
569 // [pointee type, address space]
570 if (Record.size() < 1)
571 return Error("Invalid POINTER type record");
572 unsigned AddressSpace = 0;
573 if (Record.size() == 2)
574 AddressSpace = Record[1];
575 ResultTy = getTypeByID(Record[0]);
576 if (ResultTy == 0) return Error("invalid element type in pointer type");
577 ResultTy = PointerType::get(ResultTy, AddressSpace);
580 case bitc::TYPE_CODE_FUNCTION: {
581 // FIXME: attrid is dead, remove it in LLVM 3.0
582 // FUNCTION: [vararg, attrid, retty, paramty x N]
583 if (Record.size() < 3)
584 return Error("Invalid FUNCTION type record");
585 std::vector<Type*> ArgTys;
586 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
587 if (Type *T = getTypeByID(Record[i]))
593 ResultTy = getTypeByID(Record[2]);
594 if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
595 return Error("invalid type in function type");
597 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
600 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
601 if (Record.size() < 1)
602 return Error("Invalid STRUCT type record");
603 std::vector<Type*> EltTys;
604 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
605 if (Type *T = getTypeByID(Record[i]))
610 if (EltTys.size() != Record.size()-1)
611 return Error("invalid type in struct type");
612 ResultTy = StructType::get(Context, EltTys, Record[0]);
615 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
616 if (ConvertToString(Record, 0, TypeName))
617 return Error("Invalid STRUCT_NAME record");
620 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
621 if (Record.size() < 1)
622 return Error("Invalid STRUCT type record");
624 if (NumRecords >= TypeList.size())
625 return Error("invalid TYPE table");
627 // Check to see if this was forward referenced, if so fill in the temp.
628 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
630 Res->setName(TypeName);
631 TypeList[NumRecords] = 0;
632 } else // Otherwise, create a new struct.
633 Res = StructType::createNamed(Context, TypeName);
636 SmallVector<Type*, 8> EltTys;
637 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
638 if (Type *T = getTypeByID(Record[i]))
643 if (EltTys.size() != Record.size()-1)
644 return Error("invalid STRUCT type record");
645 Res->setBody(EltTys, Record[0]);
649 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
650 if (Record.size() != 1)
651 return Error("Invalid OPAQUE type record");
653 if (NumRecords >= TypeList.size())
654 return Error("invalid TYPE table");
656 // Check to see if this was forward referenced, if so fill in the temp.
657 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
659 Res->setName(TypeName);
660 TypeList[NumRecords] = 0;
661 } else // Otherwise, create a new struct with no body.
662 Res = StructType::createNamed(Context, TypeName);
667 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
668 if (Record.size() < 2)
669 return Error("Invalid ARRAY type record");
670 if ((ResultTy = getTypeByID(Record[1])))
671 ResultTy = ArrayType::get(ResultTy, Record[0]);
673 return Error("Invalid ARRAY type element");
675 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
676 if (Record.size() < 2)
677 return Error("Invalid VECTOR type record");
678 if ((ResultTy = getTypeByID(Record[1])))
679 ResultTy = VectorType::get(ResultTy, Record[0]);
681 return Error("Invalid ARRAY type element");
685 if (NumRecords >= TypeList.size())
686 return Error("invalid TYPE table");
687 assert(ResultTy && "Didn't read a type?");
688 assert(TypeList[NumRecords] == 0 && "Already read type?");
689 TypeList[NumRecords++] = ResultTy;
693 // FIXME: Remove in LLVM 3.1
694 bool BitcodeReader::ParseOldTypeTable() {
695 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_OLD))
696 return Error("Malformed block record");
698 if (!TypeList.empty())
699 return Error("Multiple TYPE_BLOCKs found!");
702 // While horrible, we have no good ordering of types in the bc file. Just
703 // iteratively parse types out of the bc file in multiple passes until we get
704 // them all. Do this by saving a cursor for the start of the type block.
705 BitstreamCursor StartOfTypeBlockCursor(Stream);
707 unsigned NumTypesRead = 0;
709 SmallVector<uint64_t, 64> Record;
711 unsigned NextTypeID = 0;
712 bool ReadAnyTypes = false;
714 // Read all the records for this type table.
716 unsigned Code = Stream.ReadCode();
717 if (Code == bitc::END_BLOCK) {
718 if (NextTypeID != TypeList.size())
719 return Error("Invalid type forward reference in TYPE_BLOCK_ID_OLD");
721 // If we haven't read all of the types yet, iterate again.
722 if (NumTypesRead != TypeList.size()) {
723 // If we didn't successfully read any types in this pass, then we must
724 // have an unhandled forward reference.
726 return Error("Obsolete bitcode contains unhandled recursive type");
728 Stream = StartOfTypeBlockCursor;
732 if (Stream.ReadBlockEnd())
733 return Error("Error at end of type table block");
737 if (Code == bitc::ENTER_SUBBLOCK) {
738 // No known subblocks, always skip them.
739 Stream.ReadSubBlockID();
740 if (Stream.SkipBlock())
741 return Error("Malformed block record");
745 if (Code == bitc::DEFINE_ABBREV) {
746 Stream.ReadAbbrevRecord();
753 switch (Stream.ReadRecord(Code, Record)) {
754 default: return Error("unknown type in type table");
755 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
756 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
757 // type list. This allows us to reserve space.
758 if (Record.size() < 1)
759 return Error("Invalid TYPE_CODE_NUMENTRY record");
760 TypeList.resize(Record[0]);
762 case bitc::TYPE_CODE_VOID: // VOID
763 ResultTy = Type::getVoidTy(Context);
765 case bitc::TYPE_CODE_FLOAT: // FLOAT
766 ResultTy = Type::getFloatTy(Context);
768 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
769 ResultTy = Type::getDoubleTy(Context);
771 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
772 ResultTy = Type::getX86_FP80Ty(Context);
774 case bitc::TYPE_CODE_FP128: // FP128
775 ResultTy = Type::getFP128Ty(Context);
777 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
778 ResultTy = Type::getPPC_FP128Ty(Context);
780 case bitc::TYPE_CODE_LABEL: // LABEL
781 ResultTy = Type::getLabelTy(Context);
783 case bitc::TYPE_CODE_METADATA: // METADATA
784 ResultTy = Type::getMetadataTy(Context);
786 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
787 ResultTy = Type::getX86_MMXTy(Context);
789 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
790 if (Record.size() < 1)
791 return Error("Invalid Integer type record");
792 ResultTy = IntegerType::get(Context, Record[0]);
794 case bitc::TYPE_CODE_OPAQUE: // OPAQUE
795 if (NextTypeID < TypeList.size() && TypeList[NextTypeID] == 0)
796 ResultTy = StructType::createNamed(Context, "");
798 case bitc::TYPE_CODE_STRUCT_OLD: {// STRUCT_OLD
799 if (NextTypeID >= TypeList.size()) break;
800 // If we already read it, don't reprocess.
801 if (TypeList[NextTypeID] &&
802 !cast<StructType>(TypeList[NextTypeID])->isOpaque())
806 if (TypeList[NextTypeID] == 0)
807 TypeList[NextTypeID] = StructType::createNamed(Context, "");
809 std::vector<Type*> EltTys;
810 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
811 if (Type *Elt = getTypeByIDOrNull(Record[i]))
812 EltTys.push_back(Elt);
817 if (EltTys.size() != Record.size()-1)
818 break; // Not all elements are ready.
820 cast<StructType>(TypeList[NextTypeID])->setBody(EltTys, Record[0]);
821 ResultTy = TypeList[NextTypeID];
822 TypeList[NextTypeID] = 0;
825 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
826 // [pointee type, address space]
827 if (Record.size() < 1)
828 return Error("Invalid POINTER type record");
829 unsigned AddressSpace = 0;
830 if (Record.size() == 2)
831 AddressSpace = Record[1];
832 if ((ResultTy = getTypeByIDOrNull(Record[0])))
833 ResultTy = PointerType::get(ResultTy, AddressSpace);
836 case bitc::TYPE_CODE_FUNCTION: {
837 // FIXME: attrid is dead, remove it in LLVM 3.0
838 // FUNCTION: [vararg, attrid, retty, paramty x N]
839 if (Record.size() < 3)
840 return Error("Invalid FUNCTION type record");
841 std::vector<Type*> ArgTys;
842 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
843 if (Type *Elt = getTypeByIDOrNull(Record[i]))
844 ArgTys.push_back(Elt);
848 if (ArgTys.size()+3 != Record.size())
849 break; // Something was null.
850 if ((ResultTy = getTypeByIDOrNull(Record[2])))
851 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
854 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
855 if (Record.size() < 2)
856 return Error("Invalid ARRAY type record");
857 if ((ResultTy = getTypeByIDOrNull(Record[1])))
858 ResultTy = ArrayType::get(ResultTy, Record[0]);
860 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
861 if (Record.size() < 2)
862 return Error("Invalid VECTOR type record");
863 if ((ResultTy = getTypeByIDOrNull(Record[1])))
864 ResultTy = VectorType::get(ResultTy, Record[0]);
868 if (NextTypeID >= TypeList.size())
869 return Error("invalid TYPE table");
871 if (ResultTy && TypeList[NextTypeID] == 0) {
875 TypeList[NextTypeID] = ResultTy;
883 bool BitcodeReader::ParseOldTypeSymbolTable() {
884 if (Stream.EnterSubBlock(bitc::TYPE_SYMTAB_BLOCK_ID_OLD))
885 return Error("Malformed block record");
887 SmallVector<uint64_t, 64> Record;
889 // Read all the records for this type table.
890 std::string TypeName;
892 unsigned Code = Stream.ReadCode();
893 if (Code == bitc::END_BLOCK) {
894 if (Stream.ReadBlockEnd())
895 return Error("Error at end of type symbol table block");
899 if (Code == bitc::ENTER_SUBBLOCK) {
900 // No known subblocks, always skip them.
901 Stream.ReadSubBlockID();
902 if (Stream.SkipBlock())
903 return Error("Malformed block record");
907 if (Code == bitc::DEFINE_ABBREV) {
908 Stream.ReadAbbrevRecord();
914 switch (Stream.ReadRecord(Code, Record)) {
915 default: // Default behavior: unknown type.
917 case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namechar x N]
918 if (ConvertToString(Record, 1, TypeName))
919 return Error("Invalid TST_ENTRY record");
920 unsigned TypeID = Record[0];
921 if (TypeID >= TypeList.size())
922 return Error("Invalid Type ID in TST_ENTRY record");
924 // Only apply the type name to a struct type with no name.
925 if (StructType *STy = dyn_cast<StructType>(TypeList[TypeID]))
926 if (!STy->isAnonymous() && !STy->hasName())
927 STy->setName(TypeName);
934 bool BitcodeReader::ParseValueSymbolTable() {
935 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
936 return Error("Malformed block record");
938 SmallVector<uint64_t, 64> Record;
940 // Read all the records for this value table.
941 SmallString<128> ValueName;
943 unsigned Code = Stream.ReadCode();
944 if (Code == bitc::END_BLOCK) {
945 if (Stream.ReadBlockEnd())
946 return Error("Error at end of value symbol table block");
949 if (Code == bitc::ENTER_SUBBLOCK) {
950 // No known subblocks, always skip them.
951 Stream.ReadSubBlockID();
952 if (Stream.SkipBlock())
953 return Error("Malformed block record");
957 if (Code == bitc::DEFINE_ABBREV) {
958 Stream.ReadAbbrevRecord();
964 switch (Stream.ReadRecord(Code, Record)) {
965 default: // Default behavior: unknown type.
967 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
968 if (ConvertToString(Record, 1, ValueName))
969 return Error("Invalid VST_ENTRY record");
970 unsigned ValueID = Record[0];
971 if (ValueID >= ValueList.size())
972 return Error("Invalid Value ID in VST_ENTRY record");
973 Value *V = ValueList[ValueID];
975 V->setName(StringRef(ValueName.data(), ValueName.size()));
979 case bitc::VST_CODE_BBENTRY: {
980 if (ConvertToString(Record, 1, ValueName))
981 return Error("Invalid VST_BBENTRY record");
982 BasicBlock *BB = getBasicBlock(Record[0]);
984 return Error("Invalid BB ID in VST_BBENTRY record");
986 BB->setName(StringRef(ValueName.data(), ValueName.size()));
994 bool BitcodeReader::ParseMetadata() {
995 unsigned NextMDValueNo = MDValueList.size();
997 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
998 return Error("Malformed block record");
1000 SmallVector<uint64_t, 64> Record;
1002 // Read all the records.
1004 unsigned Code = Stream.ReadCode();
1005 if (Code == bitc::END_BLOCK) {
1006 if (Stream.ReadBlockEnd())
1007 return Error("Error at end of PARAMATTR block");
1011 if (Code == bitc::ENTER_SUBBLOCK) {
1012 // No known subblocks, always skip them.
1013 Stream.ReadSubBlockID();
1014 if (Stream.SkipBlock())
1015 return Error("Malformed block record");
1019 if (Code == bitc::DEFINE_ABBREV) {
1020 Stream.ReadAbbrevRecord();
1024 bool IsFunctionLocal = false;
1027 Code = Stream.ReadRecord(Code, Record);
1029 default: // Default behavior: ignore.
1031 case bitc::METADATA_NAME: {
1032 // Read named of the named metadata.
1033 unsigned NameLength = Record.size();
1034 SmallString<8> Name;
1035 Name.resize(NameLength);
1036 for (unsigned i = 0; i != NameLength; ++i)
1037 Name[i] = Record[i];
1039 Code = Stream.ReadCode();
1041 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
1042 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
1043 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
1045 // Read named metadata elements.
1046 unsigned Size = Record.size();
1047 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
1048 for (unsigned i = 0; i != Size; ++i) {
1049 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
1051 return Error("Malformed metadata record");
1052 NMD->addOperand(MD);
1056 case bitc::METADATA_FN_NODE:
1057 IsFunctionLocal = true;
1059 case bitc::METADATA_NODE: {
1060 if (Record.size() % 2 == 1)
1061 return Error("Invalid METADATA_NODE record");
1063 unsigned Size = Record.size();
1064 SmallVector<Value*, 8> Elts;
1065 for (unsigned i = 0; i != Size; i += 2) {
1066 Type *Ty = getTypeByID(Record[i]);
1067 if (!Ty) return Error("Invalid METADATA_NODE record");
1068 if (Ty->isMetadataTy())
1069 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
1070 else if (!Ty->isVoidTy())
1071 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
1073 Elts.push_back(NULL);
1075 Value *V = MDNode::getWhenValsUnresolved(Context, Elts, IsFunctionLocal);
1076 IsFunctionLocal = false;
1077 MDValueList.AssignValue(V, NextMDValueNo++);
1080 case bitc::METADATA_STRING: {
1081 unsigned MDStringLength = Record.size();
1082 SmallString<8> String;
1083 String.resize(MDStringLength);
1084 for (unsigned i = 0; i != MDStringLength; ++i)
1085 String[i] = Record[i];
1086 Value *V = MDString::get(Context,
1087 StringRef(String.data(), String.size()));
1088 MDValueList.AssignValue(V, NextMDValueNo++);
1091 case bitc::METADATA_KIND: {
1092 unsigned RecordLength = Record.size();
1093 if (Record.empty() || RecordLength < 2)
1094 return Error("Invalid METADATA_KIND record");
1095 SmallString<8> Name;
1096 Name.resize(RecordLength-1);
1097 unsigned Kind = Record[0];
1098 for (unsigned i = 1; i != RecordLength; ++i)
1099 Name[i-1] = Record[i];
1101 unsigned NewKind = TheModule->getMDKindID(Name.str());
1102 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
1103 return Error("Conflicting METADATA_KIND records");
1110 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
1111 /// the LSB for dense VBR encoding.
1112 static uint64_t DecodeSignRotatedValue(uint64_t V) {
1117 // There is no such thing as -0 with integers. "-0" really means MININT.
1121 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
1122 /// values and aliases that we can.
1123 bool BitcodeReader::ResolveGlobalAndAliasInits() {
1124 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
1125 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
1127 GlobalInitWorklist.swap(GlobalInits);
1128 AliasInitWorklist.swap(AliasInits);
1130 while (!GlobalInitWorklist.empty()) {
1131 unsigned ValID = GlobalInitWorklist.back().second;
1132 if (ValID >= ValueList.size()) {
1133 // Not ready to resolve this yet, it requires something later in the file.
1134 GlobalInits.push_back(GlobalInitWorklist.back());
1136 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
1137 GlobalInitWorklist.back().first->setInitializer(C);
1139 return Error("Global variable initializer is not a constant!");
1141 GlobalInitWorklist.pop_back();
1144 while (!AliasInitWorklist.empty()) {
1145 unsigned ValID = AliasInitWorklist.back().second;
1146 if (ValID >= ValueList.size()) {
1147 AliasInits.push_back(AliasInitWorklist.back());
1149 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
1150 AliasInitWorklist.back().first->setAliasee(C);
1152 return Error("Alias initializer is not a constant!");
1154 AliasInitWorklist.pop_back();
1159 bool BitcodeReader::ParseConstants() {
1160 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
1161 return Error("Malformed block record");
1163 SmallVector<uint64_t, 64> Record;
1165 // Read all the records for this value table.
1166 Type *CurTy = Type::getInt32Ty(Context);
1167 unsigned NextCstNo = ValueList.size();
1169 unsigned Code = Stream.ReadCode();
1170 if (Code == bitc::END_BLOCK)
1173 if (Code == bitc::ENTER_SUBBLOCK) {
1174 // No known subblocks, always skip them.
1175 Stream.ReadSubBlockID();
1176 if (Stream.SkipBlock())
1177 return Error("Malformed block record");
1181 if (Code == bitc::DEFINE_ABBREV) {
1182 Stream.ReadAbbrevRecord();
1189 unsigned BitCode = Stream.ReadRecord(Code, Record);
1191 default: // Default behavior: unknown constant
1192 case bitc::CST_CODE_UNDEF: // UNDEF
1193 V = UndefValue::get(CurTy);
1195 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
1197 return Error("Malformed CST_SETTYPE record");
1198 if (Record[0] >= TypeList.size())
1199 return Error("Invalid Type ID in CST_SETTYPE record");
1200 CurTy = TypeList[Record[0]];
1201 continue; // Skip the ValueList manipulation.
1202 case bitc::CST_CODE_NULL: // NULL
1203 V = Constant::getNullValue(CurTy);
1205 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
1206 if (!CurTy->isIntegerTy() || Record.empty())
1207 return Error("Invalid CST_INTEGER record");
1208 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
1210 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
1211 if (!CurTy->isIntegerTy() || Record.empty())
1212 return Error("Invalid WIDE_INTEGER record");
1214 unsigned NumWords = Record.size();
1215 SmallVector<uint64_t, 8> Words;
1216 Words.resize(NumWords);
1217 for (unsigned i = 0; i != NumWords; ++i)
1218 Words[i] = DecodeSignRotatedValue(Record[i]);
1219 V = ConstantInt::get(Context,
1220 APInt(cast<IntegerType>(CurTy)->getBitWidth(),
1224 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1226 return Error("Invalid FLOAT record");
1227 if (CurTy->isFloatTy())
1228 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1229 else if (CurTy->isDoubleTy())
1230 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1231 else if (CurTy->isX86_FP80Ty()) {
1232 // Bits are not stored the same way as a normal i80 APInt, compensate.
1233 uint64_t Rearrange[2];
1234 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1235 Rearrange[1] = Record[0] >> 48;
1236 V = ConstantFP::get(Context, APFloat(APInt(80, Rearrange)));
1237 } else if (CurTy->isFP128Ty())
1238 V = ConstantFP::get(Context, APFloat(APInt(128, Record), true));
1239 else if (CurTy->isPPC_FP128Ty())
1240 V = ConstantFP::get(Context, APFloat(APInt(128, Record)));
1242 V = UndefValue::get(CurTy);
1246 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1248 return Error("Invalid CST_AGGREGATE record");
1250 unsigned Size = Record.size();
1251 std::vector<Constant*> Elts;
1253 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1254 for (unsigned i = 0; i != Size; ++i)
1255 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1256 STy->getElementType(i)));
1257 V = ConstantStruct::get(STy, Elts);
1258 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1259 Type *EltTy = ATy->getElementType();
1260 for (unsigned i = 0; i != Size; ++i)
1261 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1262 V = ConstantArray::get(ATy, Elts);
1263 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1264 Type *EltTy = VTy->getElementType();
1265 for (unsigned i = 0; i != Size; ++i)
1266 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1267 V = ConstantVector::get(Elts);
1269 V = UndefValue::get(CurTy);
1273 case bitc::CST_CODE_STRING: { // STRING: [values]
1275 return Error("Invalid CST_AGGREGATE record");
1277 ArrayType *ATy = cast<ArrayType>(CurTy);
1278 Type *EltTy = ATy->getElementType();
1280 unsigned Size = Record.size();
1281 std::vector<Constant*> Elts;
1282 for (unsigned i = 0; i != Size; ++i)
1283 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1284 V = ConstantArray::get(ATy, Elts);
1287 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1289 return Error("Invalid CST_AGGREGATE record");
1291 ArrayType *ATy = cast<ArrayType>(CurTy);
1292 Type *EltTy = ATy->getElementType();
1294 unsigned Size = Record.size();
1295 std::vector<Constant*> Elts;
1296 for (unsigned i = 0; i != Size; ++i)
1297 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
1298 Elts.push_back(Constant::getNullValue(EltTy));
1299 V = ConstantArray::get(ATy, Elts);
1302 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1303 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1304 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1306 V = UndefValue::get(CurTy); // Unknown binop.
1308 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1309 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1311 if (Record.size() >= 4) {
1312 if (Opc == Instruction::Add ||
1313 Opc == Instruction::Sub ||
1314 Opc == Instruction::Mul ||
1315 Opc == Instruction::Shl) {
1316 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1317 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1318 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1319 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1320 } else if (Opc == Instruction::SDiv ||
1321 Opc == Instruction::UDiv ||
1322 Opc == Instruction::LShr ||
1323 Opc == Instruction::AShr) {
1324 if (Record[3] & (1 << bitc::PEO_EXACT))
1325 Flags |= SDivOperator::IsExact;
1328 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1332 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1333 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1334 int Opc = GetDecodedCastOpcode(Record[0]);
1336 V = UndefValue::get(CurTy); // Unknown cast.
1338 Type *OpTy = getTypeByID(Record[1]);
1339 if (!OpTy) return Error("Invalid CE_CAST record");
1340 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1341 V = ConstantExpr::getCast(Opc, Op, CurTy);
1345 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1346 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1347 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1348 SmallVector<Constant*, 16> Elts;
1349 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1350 Type *ElTy = getTypeByID(Record[i]);
1351 if (!ElTy) return Error("Invalid CE_GEP record");
1352 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1354 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1355 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1357 bitc::CST_CODE_CE_INBOUNDS_GEP);
1360 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1361 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1362 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1363 Type::getInt1Ty(Context)),
1364 ValueList.getConstantFwdRef(Record[1],CurTy),
1365 ValueList.getConstantFwdRef(Record[2],CurTy));
1367 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1368 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1370 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1371 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1372 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1373 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1374 V = ConstantExpr::getExtractElement(Op0, Op1);
1377 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1378 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1379 if (Record.size() < 3 || OpTy == 0)
1380 return Error("Invalid CE_INSERTELT record");
1381 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1382 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1383 OpTy->getElementType());
1384 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1385 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1388 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1389 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1390 if (Record.size() < 3 || OpTy == 0)
1391 return Error("Invalid CE_SHUFFLEVEC record");
1392 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1393 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1394 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1395 OpTy->getNumElements());
1396 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1397 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1400 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1401 VectorType *RTy = dyn_cast<VectorType>(CurTy);
1403 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1404 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1405 return Error("Invalid CE_SHUFVEC_EX record");
1406 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1407 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1408 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1409 RTy->getNumElements());
1410 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1411 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1414 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1415 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1416 Type *OpTy = getTypeByID(Record[0]);
1417 if (OpTy == 0) return Error("Invalid CE_CMP record");
1418 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1419 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1421 if (OpTy->isFPOrFPVectorTy())
1422 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1424 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1427 case bitc::CST_CODE_INLINEASM: {
1428 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1429 std::string AsmStr, ConstrStr;
1430 bool HasSideEffects = Record[0] & 1;
1431 bool IsAlignStack = Record[0] >> 1;
1432 unsigned AsmStrSize = Record[1];
1433 if (2+AsmStrSize >= Record.size())
1434 return Error("Invalid INLINEASM record");
1435 unsigned ConstStrSize = Record[2+AsmStrSize];
1436 if (3+AsmStrSize+ConstStrSize > Record.size())
1437 return Error("Invalid INLINEASM record");
1439 for (unsigned i = 0; i != AsmStrSize; ++i)
1440 AsmStr += (char)Record[2+i];
1441 for (unsigned i = 0; i != ConstStrSize; ++i)
1442 ConstrStr += (char)Record[3+AsmStrSize+i];
1443 PointerType *PTy = cast<PointerType>(CurTy);
1444 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1445 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1448 case bitc::CST_CODE_BLOCKADDRESS:{
1449 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1450 Type *FnTy = getTypeByID(Record[0]);
1451 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1453 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1454 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1456 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1457 Type::getInt8Ty(Context),
1458 false, GlobalValue::InternalLinkage,
1460 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1466 ValueList.AssignValue(V, NextCstNo);
1470 if (NextCstNo != ValueList.size())
1471 return Error("Invalid constant reference!");
1473 if (Stream.ReadBlockEnd())
1474 return Error("Error at end of constants block");
1476 // Once all the constants have been read, go through and resolve forward
1478 ValueList.ResolveConstantForwardRefs();
1482 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1483 /// remember where it is and then skip it. This lets us lazily deserialize the
1485 bool BitcodeReader::RememberAndSkipFunctionBody() {
1486 // Get the function we are talking about.
1487 if (FunctionsWithBodies.empty())
1488 return Error("Insufficient function protos");
1490 Function *Fn = FunctionsWithBodies.back();
1491 FunctionsWithBodies.pop_back();
1493 // Save the current stream state.
1494 uint64_t CurBit = Stream.GetCurrentBitNo();
1495 DeferredFunctionInfo[Fn] = CurBit;
1497 // Skip over the function block for now.
1498 if (Stream.SkipBlock())
1499 return Error("Malformed block record");
1503 bool BitcodeReader::ParseModule() {
1504 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1505 return Error("Malformed block record");
1507 SmallVector<uint64_t, 64> Record;
1508 std::vector<std::string> SectionTable;
1509 std::vector<std::string> GCTable;
1511 // Read all the records for this module.
1512 while (!Stream.AtEndOfStream()) {
1513 unsigned Code = Stream.ReadCode();
1514 if (Code == bitc::END_BLOCK) {
1515 if (Stream.ReadBlockEnd())
1516 return Error("Error at end of module block");
1518 // Patch the initializers for globals and aliases up.
1519 ResolveGlobalAndAliasInits();
1520 if (!GlobalInits.empty() || !AliasInits.empty())
1521 return Error("Malformed global initializer set");
1522 if (!FunctionsWithBodies.empty())
1523 return Error("Too few function bodies found");
1525 // Look for intrinsic functions which need to be upgraded at some point
1526 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1529 if (UpgradeIntrinsicFunction(FI, NewFn))
1530 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1533 // Look for global variables which need to be renamed.
1534 for (Module::global_iterator
1535 GI = TheModule->global_begin(), GE = TheModule->global_end();
1537 UpgradeGlobalVariable(GI);
1539 // Force deallocation of memory for these vectors to favor the client that
1540 // want lazy deserialization.
1541 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1542 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1543 std::vector<Function*>().swap(FunctionsWithBodies);
1547 if (Code == bitc::ENTER_SUBBLOCK) {
1548 switch (Stream.ReadSubBlockID()) {
1549 default: // Skip unknown content.
1550 if (Stream.SkipBlock())
1551 return Error("Malformed block record");
1553 case bitc::BLOCKINFO_BLOCK_ID:
1554 if (Stream.ReadBlockInfoBlock())
1555 return Error("Malformed BlockInfoBlock");
1557 case bitc::PARAMATTR_BLOCK_ID:
1558 if (ParseAttributeBlock())
1561 case bitc::TYPE_BLOCK_ID_NEW:
1562 if (ParseTypeTable())
1565 case bitc::TYPE_BLOCK_ID_OLD:
1566 if (ParseOldTypeTable())
1569 case bitc::TYPE_SYMTAB_BLOCK_ID_OLD:
1570 if (ParseOldTypeSymbolTable())
1573 case bitc::VALUE_SYMTAB_BLOCK_ID:
1574 if (ParseValueSymbolTable())
1577 case bitc::CONSTANTS_BLOCK_ID:
1578 if (ParseConstants() || ResolveGlobalAndAliasInits())
1581 case bitc::METADATA_BLOCK_ID:
1582 if (ParseMetadata())
1585 case bitc::FUNCTION_BLOCK_ID:
1586 // If this is the first function body we've seen, reverse the
1587 // FunctionsWithBodies list.
1588 if (!HasReversedFunctionsWithBodies) {
1589 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1590 HasReversedFunctionsWithBodies = true;
1593 if (RememberAndSkipFunctionBody())
1600 if (Code == bitc::DEFINE_ABBREV) {
1601 Stream.ReadAbbrevRecord();
1606 switch (Stream.ReadRecord(Code, Record)) {
1607 default: break; // Default behavior, ignore unknown content.
1608 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1609 if (Record.size() < 1)
1610 return Error("Malformed MODULE_CODE_VERSION");
1611 // Only version #0 is supported so far.
1613 return Error("Unknown bitstream version!");
1615 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1617 if (ConvertToString(Record, 0, S))
1618 return Error("Invalid MODULE_CODE_TRIPLE record");
1619 TheModule->setTargetTriple(S);
1622 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1624 if (ConvertToString(Record, 0, S))
1625 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1626 TheModule->setDataLayout(S);
1629 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1631 if (ConvertToString(Record, 0, S))
1632 return Error("Invalid MODULE_CODE_ASM record");
1633 TheModule->setModuleInlineAsm(S);
1636 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1638 if (ConvertToString(Record, 0, S))
1639 return Error("Invalid MODULE_CODE_DEPLIB record");
1640 TheModule->addLibrary(S);
1643 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1645 if (ConvertToString(Record, 0, S))
1646 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1647 SectionTable.push_back(S);
1650 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1652 if (ConvertToString(Record, 0, S))
1653 return Error("Invalid MODULE_CODE_GCNAME record");
1654 GCTable.push_back(S);
1657 // GLOBALVAR: [pointer type, isconst, initid,
1658 // linkage, alignment, section, visibility, threadlocal,
1660 case bitc::MODULE_CODE_GLOBALVAR: {
1661 if (Record.size() < 6)
1662 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1663 Type *Ty = getTypeByID(Record[0]);
1664 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1665 if (!Ty->isPointerTy())
1666 return Error("Global not a pointer type!");
1667 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1668 Ty = cast<PointerType>(Ty)->getElementType();
1670 bool isConstant = Record[1];
1671 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1672 unsigned Alignment = (1 << Record[4]) >> 1;
1673 std::string Section;
1675 if (Record[5]-1 >= SectionTable.size())
1676 return Error("Invalid section ID");
1677 Section = SectionTable[Record[5]-1];
1679 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1680 if (Record.size() > 6)
1681 Visibility = GetDecodedVisibility(Record[6]);
1682 bool isThreadLocal = false;
1683 if (Record.size() > 7)
1684 isThreadLocal = Record[7];
1686 bool UnnamedAddr = false;
1687 if (Record.size() > 8)
1688 UnnamedAddr = Record[8];
1690 GlobalVariable *NewGV =
1691 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1692 isThreadLocal, AddressSpace);
1693 NewGV->setAlignment(Alignment);
1694 if (!Section.empty())
1695 NewGV->setSection(Section);
1696 NewGV->setVisibility(Visibility);
1697 NewGV->setThreadLocal(isThreadLocal);
1698 NewGV->setUnnamedAddr(UnnamedAddr);
1700 ValueList.push_back(NewGV);
1702 // Remember which value to use for the global initializer.
1703 if (unsigned InitID = Record[2])
1704 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1707 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1708 // alignment, section, visibility, gc, unnamed_addr]
1709 case bitc::MODULE_CODE_FUNCTION: {
1710 if (Record.size() < 8)
1711 return Error("Invalid MODULE_CODE_FUNCTION record");
1712 Type *Ty = getTypeByID(Record[0]);
1713 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1714 if (!Ty->isPointerTy())
1715 return Error("Function not a pointer type!");
1717 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1719 return Error("Function not a pointer to function type!");
1721 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1724 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1725 bool isProto = Record[2];
1726 Func->setLinkage(GetDecodedLinkage(Record[3]));
1727 Func->setAttributes(getAttributes(Record[4]));
1729 Func->setAlignment((1 << Record[5]) >> 1);
1731 if (Record[6]-1 >= SectionTable.size())
1732 return Error("Invalid section ID");
1733 Func->setSection(SectionTable[Record[6]-1]);
1735 Func->setVisibility(GetDecodedVisibility(Record[7]));
1736 if (Record.size() > 8 && Record[8]) {
1737 if (Record[8]-1 > GCTable.size())
1738 return Error("Invalid GC ID");
1739 Func->setGC(GCTable[Record[8]-1].c_str());
1741 bool UnnamedAddr = false;
1742 if (Record.size() > 9)
1743 UnnamedAddr = Record[9];
1744 Func->setUnnamedAddr(UnnamedAddr);
1745 ValueList.push_back(Func);
1747 // If this is a function with a body, remember the prototype we are
1748 // creating now, so that we can match up the body with them later.
1750 FunctionsWithBodies.push_back(Func);
1753 // ALIAS: [alias type, aliasee val#, linkage]
1754 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1755 case bitc::MODULE_CODE_ALIAS: {
1756 if (Record.size() < 3)
1757 return Error("Invalid MODULE_ALIAS record");
1758 Type *Ty = getTypeByID(Record[0]);
1759 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1760 if (!Ty->isPointerTy())
1761 return Error("Function not a pointer type!");
1763 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1765 // Old bitcode files didn't have visibility field.
1766 if (Record.size() > 3)
1767 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1768 ValueList.push_back(NewGA);
1769 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1772 /// MODULE_CODE_PURGEVALS: [numvals]
1773 case bitc::MODULE_CODE_PURGEVALS:
1774 // Trim down the value list to the specified size.
1775 if (Record.size() < 1 || Record[0] > ValueList.size())
1776 return Error("Invalid MODULE_PURGEVALS record");
1777 ValueList.shrinkTo(Record[0]);
1783 return Error("Premature end of bitstream");
1786 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1789 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1790 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1792 if (Buffer->getBufferSize() & 3) {
1793 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
1794 return Error("Invalid bitcode signature");
1796 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1799 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1800 // The magic number is 0x0B17C0DE stored in little endian.
1801 if (isBitcodeWrapper(BufPtr, BufEnd))
1802 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1803 return Error("Invalid bitcode wrapper header");
1805 StreamFile.init(BufPtr, BufEnd);
1806 Stream.init(StreamFile);
1808 // Sniff for the signature.
1809 if (Stream.Read(8) != 'B' ||
1810 Stream.Read(8) != 'C' ||
1811 Stream.Read(4) != 0x0 ||
1812 Stream.Read(4) != 0xC ||
1813 Stream.Read(4) != 0xE ||
1814 Stream.Read(4) != 0xD)
1815 return Error("Invalid bitcode signature");
1817 // We expect a number of well-defined blocks, though we don't necessarily
1818 // need to understand them all.
1819 while (!Stream.AtEndOfStream()) {
1820 unsigned Code = Stream.ReadCode();
1822 if (Code != bitc::ENTER_SUBBLOCK) {
1824 // The ranlib in xcode 4 will align archive members by appending newlines to the
1825 // end of them. If this file size is a multiple of 4 but not 8, we have to read and
1826 // ignore these final 4 bytes :-(
1827 if (Stream.GetAbbrevIDWidth() == 2 && Code == 2 &&
1828 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1829 Stream.AtEndOfStream())
1832 return Error("Invalid record at top-level");
1835 unsigned BlockID = Stream.ReadSubBlockID();
1837 // We only know the MODULE subblock ID.
1839 case bitc::BLOCKINFO_BLOCK_ID:
1840 if (Stream.ReadBlockInfoBlock())
1841 return Error("Malformed BlockInfoBlock");
1843 case bitc::MODULE_BLOCK_ID:
1844 // Reject multiple MODULE_BLOCK's in a single bitstream.
1846 return Error("Multiple MODULE_BLOCKs in same stream");
1852 if (Stream.SkipBlock())
1853 return Error("Malformed block record");
1861 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1862 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1863 return Error("Malformed block record");
1865 SmallVector<uint64_t, 64> Record;
1867 // Read all the records for this module.
1868 while (!Stream.AtEndOfStream()) {
1869 unsigned Code = Stream.ReadCode();
1870 if (Code == bitc::END_BLOCK) {
1871 if (Stream.ReadBlockEnd())
1872 return Error("Error at end of module block");
1877 if (Code == bitc::ENTER_SUBBLOCK) {
1878 switch (Stream.ReadSubBlockID()) {
1879 default: // Skip unknown content.
1880 if (Stream.SkipBlock())
1881 return Error("Malformed block record");
1887 if (Code == bitc::DEFINE_ABBREV) {
1888 Stream.ReadAbbrevRecord();
1893 switch (Stream.ReadRecord(Code, Record)) {
1894 default: break; // Default behavior, ignore unknown content.
1895 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1896 if (Record.size() < 1)
1897 return Error("Malformed MODULE_CODE_VERSION");
1898 // Only version #0 is supported so far.
1900 return Error("Unknown bitstream version!");
1902 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1904 if (ConvertToString(Record, 0, S))
1905 return Error("Invalid MODULE_CODE_TRIPLE record");
1913 return Error("Premature end of bitstream");
1916 bool BitcodeReader::ParseTriple(std::string &Triple) {
1917 if (Buffer->getBufferSize() & 3)
1918 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1920 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1921 unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
1923 // If we have a wrapper header, parse it and ignore the non-bc file contents.
1924 // The magic number is 0x0B17C0DE stored in little endian.
1925 if (isBitcodeWrapper(BufPtr, BufEnd))
1926 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd))
1927 return Error("Invalid bitcode wrapper header");
1929 StreamFile.init(BufPtr, BufEnd);
1930 Stream.init(StreamFile);
1932 // Sniff for the signature.
1933 if (Stream.Read(8) != 'B' ||
1934 Stream.Read(8) != 'C' ||
1935 Stream.Read(4) != 0x0 ||
1936 Stream.Read(4) != 0xC ||
1937 Stream.Read(4) != 0xE ||
1938 Stream.Read(4) != 0xD)
1939 return Error("Invalid bitcode signature");
1941 // We expect a number of well-defined blocks, though we don't necessarily
1942 // need to understand them all.
1943 while (!Stream.AtEndOfStream()) {
1944 unsigned Code = Stream.ReadCode();
1946 if (Code != bitc::ENTER_SUBBLOCK)
1947 return Error("Invalid record at top-level");
1949 unsigned BlockID = Stream.ReadSubBlockID();
1951 // We only know the MODULE subblock ID.
1953 case bitc::MODULE_BLOCK_ID:
1954 if (ParseModuleTriple(Triple))
1958 if (Stream.SkipBlock())
1959 return Error("Malformed block record");
1967 /// ParseMetadataAttachment - Parse metadata attachments.
1968 bool BitcodeReader::ParseMetadataAttachment() {
1969 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1970 return Error("Malformed block record");
1972 SmallVector<uint64_t, 64> Record;
1974 unsigned Code = Stream.ReadCode();
1975 if (Code == bitc::END_BLOCK) {
1976 if (Stream.ReadBlockEnd())
1977 return Error("Error at end of PARAMATTR block");
1980 if (Code == bitc::DEFINE_ABBREV) {
1981 Stream.ReadAbbrevRecord();
1984 // Read a metadata attachment record.
1986 switch (Stream.ReadRecord(Code, Record)) {
1987 default: // Default behavior: ignore.
1989 case bitc::METADATA_ATTACHMENT: {
1990 unsigned RecordLength = Record.size();
1991 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1992 return Error ("Invalid METADATA_ATTACHMENT reader!");
1993 Instruction *Inst = InstructionList[Record[0]];
1994 for (unsigned i = 1; i != RecordLength; i = i+2) {
1995 unsigned Kind = Record[i];
1996 DenseMap<unsigned, unsigned>::iterator I =
1997 MDKindMap.find(Kind);
1998 if (I == MDKindMap.end())
1999 return Error("Invalid metadata kind ID");
2000 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
2001 Inst->setMetadata(I->second, cast<MDNode>(Node));
2010 /// ParseFunctionBody - Lazily parse the specified function body block.
2011 bool BitcodeReader::ParseFunctionBody(Function *F) {
2012 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
2013 return Error("Malformed block record");
2015 InstructionList.clear();
2016 unsigned ModuleValueListSize = ValueList.size();
2017 unsigned ModuleMDValueListSize = MDValueList.size();
2019 // Add all the function arguments to the value table.
2020 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
2021 ValueList.push_back(I);
2023 unsigned NextValueNo = ValueList.size();
2024 BasicBlock *CurBB = 0;
2025 unsigned CurBBNo = 0;
2029 // Read all the records.
2030 SmallVector<uint64_t, 64> Record;
2032 unsigned Code = Stream.ReadCode();
2033 if (Code == bitc::END_BLOCK) {
2034 if (Stream.ReadBlockEnd())
2035 return Error("Error at end of function block");
2039 if (Code == bitc::ENTER_SUBBLOCK) {
2040 switch (Stream.ReadSubBlockID()) {
2041 default: // Skip unknown content.
2042 if (Stream.SkipBlock())
2043 return Error("Malformed block record");
2045 case bitc::CONSTANTS_BLOCK_ID:
2046 if (ParseConstants()) return true;
2047 NextValueNo = ValueList.size();
2049 case bitc::VALUE_SYMTAB_BLOCK_ID:
2050 if (ParseValueSymbolTable()) return true;
2052 case bitc::METADATA_ATTACHMENT_ID:
2053 if (ParseMetadataAttachment()) return true;
2055 case bitc::METADATA_BLOCK_ID:
2056 if (ParseMetadata()) return true;
2062 if (Code == bitc::DEFINE_ABBREV) {
2063 Stream.ReadAbbrevRecord();
2070 unsigned BitCode = Stream.ReadRecord(Code, Record);
2072 default: // Default behavior: reject
2073 return Error("Unknown instruction");
2074 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
2075 if (Record.size() < 1 || Record[0] == 0)
2076 return Error("Invalid DECLAREBLOCKS record");
2077 // Create all the basic blocks for the function.
2078 FunctionBBs.resize(Record[0]);
2079 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
2080 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
2081 CurBB = FunctionBBs[0];
2084 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
2085 // This record indicates that the last instruction is at the same
2086 // location as the previous instruction with a location.
2089 // Get the last instruction emitted.
2090 if (CurBB && !CurBB->empty())
2092 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
2093 !FunctionBBs[CurBBNo-1]->empty())
2094 I = &FunctionBBs[CurBBNo-1]->back();
2096 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
2097 I->setDebugLoc(LastLoc);
2101 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
2102 I = 0; // Get the last instruction emitted.
2103 if (CurBB && !CurBB->empty())
2105 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
2106 !FunctionBBs[CurBBNo-1]->empty())
2107 I = &FunctionBBs[CurBBNo-1]->back();
2108 if (I == 0 || Record.size() < 4)
2109 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
2111 unsigned Line = Record[0], Col = Record[1];
2112 unsigned ScopeID = Record[2], IAID = Record[3];
2114 MDNode *Scope = 0, *IA = 0;
2115 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
2116 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
2117 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
2118 I->setDebugLoc(LastLoc);
2123 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
2126 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2127 getValue(Record, OpNum, LHS->getType(), RHS) ||
2128 OpNum+1 > Record.size())
2129 return Error("Invalid BINOP record");
2131 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
2132 if (Opc == -1) return Error("Invalid BINOP record");
2133 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
2134 InstructionList.push_back(I);
2135 if (OpNum < Record.size()) {
2136 if (Opc == Instruction::Add ||
2137 Opc == Instruction::Sub ||
2138 Opc == Instruction::Mul ||
2139 Opc == Instruction::Shl) {
2140 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2141 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
2142 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2143 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
2144 } else if (Opc == Instruction::SDiv ||
2145 Opc == Instruction::UDiv ||
2146 Opc == Instruction::LShr ||
2147 Opc == Instruction::AShr) {
2148 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
2149 cast<BinaryOperator>(I)->setIsExact(true);
2154 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
2157 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2158 OpNum+2 != Record.size())
2159 return Error("Invalid CAST record");
2161 Type *ResTy = getTypeByID(Record[OpNum]);
2162 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
2163 if (Opc == -1 || ResTy == 0)
2164 return Error("Invalid CAST record");
2165 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
2166 InstructionList.push_back(I);
2169 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
2170 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
2173 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
2174 return Error("Invalid GEP record");
2176 SmallVector<Value*, 16> GEPIdx;
2177 while (OpNum != Record.size()) {
2179 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2180 return Error("Invalid GEP record");
2181 GEPIdx.push_back(Op);
2184 I = GetElementPtrInst::Create(BasePtr, GEPIdx.begin(), GEPIdx.end());
2185 InstructionList.push_back(I);
2186 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
2187 cast<GetElementPtrInst>(I)->setIsInBounds(true);
2191 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
2192 // EXTRACTVAL: [opty, opval, n x indices]
2195 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2196 return Error("Invalid EXTRACTVAL record");
2198 SmallVector<unsigned, 4> EXTRACTVALIdx;
2199 for (unsigned RecSize = Record.size();
2200 OpNum != RecSize; ++OpNum) {
2201 uint64_t Index = Record[OpNum];
2202 if ((unsigned)Index != Index)
2203 return Error("Invalid EXTRACTVAL index");
2204 EXTRACTVALIdx.push_back((unsigned)Index);
2207 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
2208 InstructionList.push_back(I);
2212 case bitc::FUNC_CODE_INST_INSERTVAL: {
2213 // INSERTVAL: [opty, opval, opty, opval, n x indices]
2216 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2217 return Error("Invalid INSERTVAL record");
2219 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
2220 return Error("Invalid INSERTVAL record");
2222 SmallVector<unsigned, 4> INSERTVALIdx;
2223 for (unsigned RecSize = Record.size();
2224 OpNum != RecSize; ++OpNum) {
2225 uint64_t Index = Record[OpNum];
2226 if ((unsigned)Index != Index)
2227 return Error("Invalid INSERTVAL index");
2228 INSERTVALIdx.push_back((unsigned)Index);
2231 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
2232 InstructionList.push_back(I);
2236 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2237 // obsolete form of select
2238 // handles select i1 ... in old bitcode
2240 Value *TrueVal, *FalseVal, *Cond;
2241 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2242 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2243 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
2244 return Error("Invalid SELECT record");
2246 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2247 InstructionList.push_back(I);
2251 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2252 // new form of select
2253 // handles select i1 or select [N x i1]
2255 Value *TrueVal, *FalseVal, *Cond;
2256 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2257 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2258 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2259 return Error("Invalid SELECT record");
2261 // select condition can be either i1 or [N x i1]
2262 if (VectorType* vector_type =
2263 dyn_cast<VectorType>(Cond->getType())) {
2265 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2266 return Error("Invalid SELECT condition type");
2269 if (Cond->getType() != Type::getInt1Ty(Context))
2270 return Error("Invalid SELECT condition type");
2273 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2274 InstructionList.push_back(I);
2278 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2281 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2282 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2283 return Error("Invalid EXTRACTELT record");
2284 I = ExtractElementInst::Create(Vec, Idx);
2285 InstructionList.push_back(I);
2289 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2291 Value *Vec, *Elt, *Idx;
2292 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2293 getValue(Record, OpNum,
2294 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2295 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2296 return Error("Invalid INSERTELT record");
2297 I = InsertElementInst::Create(Vec, Elt, Idx);
2298 InstructionList.push_back(I);
2302 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2304 Value *Vec1, *Vec2, *Mask;
2305 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2306 getValue(Record, OpNum, Vec1->getType(), Vec2))
2307 return Error("Invalid SHUFFLEVEC record");
2309 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2310 return Error("Invalid SHUFFLEVEC record");
2311 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2312 InstructionList.push_back(I);
2316 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2317 // Old form of ICmp/FCmp returning bool
2318 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2319 // both legal on vectors but had different behaviour.
2320 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2321 // FCmp/ICmp returning bool or vector of bool
2325 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2326 getValue(Record, OpNum, LHS->getType(), RHS) ||
2327 OpNum+1 != Record.size())
2328 return Error("Invalid CMP record");
2330 if (LHS->getType()->isFPOrFPVectorTy())
2331 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2333 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2334 InstructionList.push_back(I);
2338 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2340 unsigned Size = Record.size();
2342 I = ReturnInst::Create(Context);
2343 InstructionList.push_back(I);
2349 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2350 return Error("Invalid RET record");
2351 if (OpNum != Record.size())
2352 return Error("Invalid RET record");
2354 I = ReturnInst::Create(Context, Op);
2355 InstructionList.push_back(I);
2358 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2359 if (Record.size() != 1 && Record.size() != 3)
2360 return Error("Invalid BR record");
2361 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2363 return Error("Invalid BR record");
2365 if (Record.size() == 1) {
2366 I = BranchInst::Create(TrueDest);
2367 InstructionList.push_back(I);
2370 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2371 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
2372 if (FalseDest == 0 || Cond == 0)
2373 return Error("Invalid BR record");
2374 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2375 InstructionList.push_back(I);
2379 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2380 if (Record.size() < 3 || (Record.size() & 1) == 0)
2381 return Error("Invalid SWITCH record");
2382 Type *OpTy = getTypeByID(Record[0]);
2383 Value *Cond = getFnValueByID(Record[1], OpTy);
2384 BasicBlock *Default = getBasicBlock(Record[2]);
2385 if (OpTy == 0 || Cond == 0 || Default == 0)
2386 return Error("Invalid SWITCH record");
2387 unsigned NumCases = (Record.size()-3)/2;
2388 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2389 InstructionList.push_back(SI);
2390 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2391 ConstantInt *CaseVal =
2392 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2393 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2394 if (CaseVal == 0 || DestBB == 0) {
2396 return Error("Invalid SWITCH record!");
2398 SI->addCase(CaseVal, DestBB);
2403 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2404 if (Record.size() < 2)
2405 return Error("Invalid INDIRECTBR record");
2406 Type *OpTy = getTypeByID(Record[0]);
2407 Value *Address = getFnValueByID(Record[1], OpTy);
2408 if (OpTy == 0 || Address == 0)
2409 return Error("Invalid INDIRECTBR record");
2410 unsigned NumDests = Record.size()-2;
2411 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2412 InstructionList.push_back(IBI);
2413 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2414 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2415 IBI->addDestination(DestBB);
2418 return Error("Invalid INDIRECTBR record!");
2425 case bitc::FUNC_CODE_INST_INVOKE: {
2426 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2427 if (Record.size() < 4) return Error("Invalid INVOKE record");
2428 AttrListPtr PAL = getAttributes(Record[0]);
2429 unsigned CCInfo = Record[1];
2430 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2431 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2435 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2436 return Error("Invalid INVOKE record");
2438 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2439 FunctionType *FTy = !CalleeTy ? 0 :
2440 dyn_cast<FunctionType>(CalleeTy->getElementType());
2442 // Check that the right number of fixed parameters are here.
2443 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2444 Record.size() < OpNum+FTy->getNumParams())
2445 return Error("Invalid INVOKE record");
2447 SmallVector<Value*, 16> Ops;
2448 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2449 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2450 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2453 if (!FTy->isVarArg()) {
2454 if (Record.size() != OpNum)
2455 return Error("Invalid INVOKE record");
2457 // Read type/value pairs for varargs params.
2458 while (OpNum != Record.size()) {
2460 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2461 return Error("Invalid INVOKE record");
2466 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
2467 InstructionList.push_back(I);
2468 cast<InvokeInst>(I)->setCallingConv(
2469 static_cast<CallingConv::ID>(CCInfo));
2470 cast<InvokeInst>(I)->setAttributes(PAL);
2473 case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
2474 I = new UnwindInst(Context);
2475 InstructionList.push_back(I);
2477 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2478 I = new UnreachableInst(Context);
2479 InstructionList.push_back(I);
2481 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2482 if (Record.size() < 1 || ((Record.size()-1)&1))
2483 return Error("Invalid PHI record");
2484 Type *Ty = getTypeByID(Record[0]);
2485 if (!Ty) return Error("Invalid PHI record");
2487 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2488 InstructionList.push_back(PN);
2490 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2491 Value *V = getFnValueByID(Record[1+i], Ty);
2492 BasicBlock *BB = getBasicBlock(Record[2+i]);
2493 if (!V || !BB) return Error("Invalid PHI record");
2494 PN->addIncoming(V, BB);
2500 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2501 if (Record.size() != 4)
2502 return Error("Invalid ALLOCA record");
2504 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2505 Type *OpTy = getTypeByID(Record[1]);
2506 Value *Size = getFnValueByID(Record[2], OpTy);
2507 unsigned Align = Record[3];
2508 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2509 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2510 InstructionList.push_back(I);
2513 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2516 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2517 OpNum+2 != Record.size())
2518 return Error("Invalid LOAD record");
2520 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2521 InstructionList.push_back(I);
2524 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
2527 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2528 getValue(Record, OpNum,
2529 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2530 OpNum+2 != Record.size())
2531 return Error("Invalid STORE record");
2533 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2534 InstructionList.push_back(I);
2537 case bitc::FUNC_CODE_INST_CALL: {
2538 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2539 if (Record.size() < 3)
2540 return Error("Invalid CALL record");
2542 AttrListPtr PAL = getAttributes(Record[0]);
2543 unsigned CCInfo = Record[1];
2547 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2548 return Error("Invalid CALL record");
2550 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2551 FunctionType *FTy = 0;
2552 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2553 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2554 return Error("Invalid CALL record");
2556 SmallVector<Value*, 16> Args;
2557 // Read the fixed params.
2558 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2559 if (FTy->getParamType(i)->isLabelTy())
2560 Args.push_back(getBasicBlock(Record[OpNum]));
2562 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2563 if (Args.back() == 0) return Error("Invalid CALL record");
2566 // Read type/value pairs for varargs params.
2567 if (!FTy->isVarArg()) {
2568 if (OpNum != Record.size())
2569 return Error("Invalid CALL record");
2571 while (OpNum != Record.size()) {
2573 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2574 return Error("Invalid CALL record");
2579 I = CallInst::Create(Callee, Args);
2580 InstructionList.push_back(I);
2581 cast<CallInst>(I)->setCallingConv(
2582 static_cast<CallingConv::ID>(CCInfo>>1));
2583 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2584 cast<CallInst>(I)->setAttributes(PAL);
2587 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2588 if (Record.size() < 3)
2589 return Error("Invalid VAARG record");
2590 Type *OpTy = getTypeByID(Record[0]);
2591 Value *Op = getFnValueByID(Record[1], OpTy);
2592 Type *ResTy = getTypeByID(Record[2]);
2593 if (!OpTy || !Op || !ResTy)
2594 return Error("Invalid VAARG record");
2595 I = new VAArgInst(Op, ResTy);
2596 InstructionList.push_back(I);
2601 // Add instruction to end of current BB. If there is no current BB, reject
2605 return Error("Invalid instruction with no BB");
2607 CurBB->getInstList().push_back(I);
2609 // If this was a terminator instruction, move to the next block.
2610 if (isa<TerminatorInst>(I)) {
2612 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2615 // Non-void values get registered in the value table for future use.
2616 if (I && !I->getType()->isVoidTy())
2617 ValueList.AssignValue(I, NextValueNo++);
2620 // Check the function list for unresolved values.
2621 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2622 if (A->getParent() == 0) {
2623 // We found at least one unresolved value. Nuke them all to avoid leaks.
2624 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2625 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2626 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2630 return Error("Never resolved value found in function!");
2634 // FIXME: Check for unresolved forward-declared metadata references
2635 // and clean up leaks.
2637 // See if anything took the address of blocks in this function. If so,
2638 // resolve them now.
2639 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2640 BlockAddrFwdRefs.find(F);
2641 if (BAFRI != BlockAddrFwdRefs.end()) {
2642 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2643 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2644 unsigned BlockIdx = RefList[i].first;
2645 if (BlockIdx >= FunctionBBs.size())
2646 return Error("Invalid blockaddress block #");
2648 GlobalVariable *FwdRef = RefList[i].second;
2649 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2650 FwdRef->eraseFromParent();
2653 BlockAddrFwdRefs.erase(BAFRI);
2656 // Trim the value list down to the size it was before we parsed this function.
2657 ValueList.shrinkTo(ModuleValueListSize);
2658 MDValueList.shrinkTo(ModuleMDValueListSize);
2659 std::vector<BasicBlock*>().swap(FunctionBBs);
2663 //===----------------------------------------------------------------------===//
2664 // GVMaterializer implementation
2665 //===----------------------------------------------------------------------===//
2668 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2669 if (const Function *F = dyn_cast<Function>(GV)) {
2670 return F->isDeclaration() &&
2671 DeferredFunctionInfo.count(const_cast<Function*>(F));
2676 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2677 Function *F = dyn_cast<Function>(GV);
2678 // If it's not a function or is already material, ignore the request.
2679 if (!F || !F->isMaterializable()) return false;
2681 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2682 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2684 // Move the bit stream to the saved position of the deferred function body.
2685 Stream.JumpToBit(DFII->second);
2687 if (ParseFunctionBody(F)) {
2688 if (ErrInfo) *ErrInfo = ErrorString;
2692 // Upgrade any old intrinsic calls in the function.
2693 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2694 E = UpgradedIntrinsics.end(); I != E; ++I) {
2695 if (I->first != I->second) {
2696 for (Value::use_iterator UI = I->first->use_begin(),
2697 UE = I->first->use_end(); UI != UE; ) {
2698 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2699 UpgradeIntrinsicCall(CI, I->second);
2707 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2708 const Function *F = dyn_cast<Function>(GV);
2709 if (!F || F->isDeclaration())
2711 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2714 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2715 Function *F = dyn_cast<Function>(GV);
2716 // If this function isn't dematerializable, this is a noop.
2717 if (!F || !isDematerializable(F))
2720 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2722 // Just forget the function body, we can remat it later.
2727 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2728 assert(M == TheModule &&
2729 "Can only Materialize the Module this BitcodeReader is attached to.");
2730 // Iterate over the module, deserializing any functions that are still on
2732 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2734 if (F->isMaterializable() &&
2735 Materialize(F, ErrInfo))
2738 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2739 // delete the old functions to clean up. We can't do this unless the entire
2740 // module is materialized because there could always be another function body
2741 // with calls to the old function.
2742 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2743 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2744 if (I->first != I->second) {
2745 for (Value::use_iterator UI = I->first->use_begin(),
2746 UE = I->first->use_end(); UI != UE; ) {
2747 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2748 UpgradeIntrinsicCall(CI, I->second);
2750 if (!I->first->use_empty())
2751 I->first->replaceAllUsesWith(I->second);
2752 I->first->eraseFromParent();
2755 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2757 // Check debug info intrinsics.
2758 CheckDebugInfoIntrinsics(TheModule);
2764 //===----------------------------------------------------------------------===//
2765 // External interface
2766 //===----------------------------------------------------------------------===//
2768 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2770 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2771 LLVMContext& Context,
2772 std::string *ErrMsg) {
2773 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2774 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2775 M->setMaterializer(R);
2776 if (R->ParseBitcodeInto(M)) {
2778 *ErrMsg = R->getErrorString();
2780 delete M; // Also deletes R.
2783 // Have the BitcodeReader dtor delete 'Buffer'.
2784 R->setBufferOwned(true);
2788 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2789 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2790 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2791 std::string *ErrMsg){
2792 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2795 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2796 // there was an error.
2797 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2799 // Read in the entire module, and destroy the BitcodeReader.
2800 if (M->MaterializeAllPermanently(ErrMsg)) {
2808 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
2809 LLVMContext& Context,
2810 std::string *ErrMsg) {
2811 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2812 // Don't let the BitcodeReader dtor delete 'Buffer'.
2813 R->setBufferOwned(false);
2815 std::string Triple("");
2816 if (R->ParseTriple(Triple))
2818 *ErrMsg = R->getErrorString();