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/DataStream.h"
26 #include "llvm/Support/MathExtras.h"
27 #include "llvm/Support/MemoryBuffer.h"
28 #include "llvm/OperandTraits.h"
32 SWITCH_INST_MAGIC = 0x4B5 // May 2012 => 1205 => Hex
35 void BitcodeReader::materializeForwardReferencedFunctions() {
36 while (!BlockAddrFwdRefs.empty()) {
37 Function *F = BlockAddrFwdRefs.begin()->first;
42 void BitcodeReader::FreeState() {
46 std::vector<Type*>().swap(TypeList);
50 std::vector<AttrListPtr>().swap(MAttributes);
51 std::vector<BasicBlock*>().swap(FunctionBBs);
52 std::vector<Function*>().swap(FunctionsWithBodies);
53 DeferredFunctionInfo.clear();
57 //===----------------------------------------------------------------------===//
58 // Helper functions to implement forward reference resolution, etc.
59 //===----------------------------------------------------------------------===//
61 /// ConvertToString - Convert a string from a record into an std::string, return
63 template<typename StrTy>
64 static bool ConvertToString(SmallVector<uint64_t, 64> &Record, unsigned Idx,
66 if (Idx > Record.size())
69 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
70 Result += (char)Record[i];
74 static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
76 default: // Map unknown/new linkages to external
77 case 0: return GlobalValue::ExternalLinkage;
78 case 1: return GlobalValue::WeakAnyLinkage;
79 case 2: return GlobalValue::AppendingLinkage;
80 case 3: return GlobalValue::InternalLinkage;
81 case 4: return GlobalValue::LinkOnceAnyLinkage;
82 case 5: return GlobalValue::DLLImportLinkage;
83 case 6: return GlobalValue::DLLExportLinkage;
84 case 7: return GlobalValue::ExternalWeakLinkage;
85 case 8: return GlobalValue::CommonLinkage;
86 case 9: return GlobalValue::PrivateLinkage;
87 case 10: return GlobalValue::WeakODRLinkage;
88 case 11: return GlobalValue::LinkOnceODRLinkage;
89 case 12: return GlobalValue::AvailableExternallyLinkage;
90 case 13: return GlobalValue::LinkerPrivateLinkage;
91 case 14: return GlobalValue::LinkerPrivateWeakLinkage;
92 case 15: return GlobalValue::LinkerPrivateWeakDefAutoLinkage;
96 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
98 default: // Map unknown visibilities to default.
99 case 0: return GlobalValue::DefaultVisibility;
100 case 1: return GlobalValue::HiddenVisibility;
101 case 2: return GlobalValue::ProtectedVisibility;
105 static int GetDecodedCastOpcode(unsigned Val) {
108 case bitc::CAST_TRUNC : return Instruction::Trunc;
109 case bitc::CAST_ZEXT : return Instruction::ZExt;
110 case bitc::CAST_SEXT : return Instruction::SExt;
111 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
112 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
113 case bitc::CAST_UITOFP : return Instruction::UIToFP;
114 case bitc::CAST_SITOFP : return Instruction::SIToFP;
115 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
116 case bitc::CAST_FPEXT : return Instruction::FPExt;
117 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
118 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
119 case bitc::CAST_BITCAST : return Instruction::BitCast;
122 static int GetDecodedBinaryOpcode(unsigned Val, Type *Ty) {
125 case bitc::BINOP_ADD:
126 return Ty->isFPOrFPVectorTy() ? Instruction::FAdd : Instruction::Add;
127 case bitc::BINOP_SUB:
128 return Ty->isFPOrFPVectorTy() ? Instruction::FSub : Instruction::Sub;
129 case bitc::BINOP_MUL:
130 return Ty->isFPOrFPVectorTy() ? Instruction::FMul : Instruction::Mul;
131 case bitc::BINOP_UDIV: return Instruction::UDiv;
132 case bitc::BINOP_SDIV:
133 return Ty->isFPOrFPVectorTy() ? Instruction::FDiv : Instruction::SDiv;
134 case bitc::BINOP_UREM: return Instruction::URem;
135 case bitc::BINOP_SREM:
136 return Ty->isFPOrFPVectorTy() ? Instruction::FRem : Instruction::SRem;
137 case bitc::BINOP_SHL: return Instruction::Shl;
138 case bitc::BINOP_LSHR: return Instruction::LShr;
139 case bitc::BINOP_ASHR: return Instruction::AShr;
140 case bitc::BINOP_AND: return Instruction::And;
141 case bitc::BINOP_OR: return Instruction::Or;
142 case bitc::BINOP_XOR: return Instruction::Xor;
146 static AtomicRMWInst::BinOp GetDecodedRMWOperation(unsigned Val) {
148 default: return AtomicRMWInst::BAD_BINOP;
149 case bitc::RMW_XCHG: return AtomicRMWInst::Xchg;
150 case bitc::RMW_ADD: return AtomicRMWInst::Add;
151 case bitc::RMW_SUB: return AtomicRMWInst::Sub;
152 case bitc::RMW_AND: return AtomicRMWInst::And;
153 case bitc::RMW_NAND: return AtomicRMWInst::Nand;
154 case bitc::RMW_OR: return AtomicRMWInst::Or;
155 case bitc::RMW_XOR: return AtomicRMWInst::Xor;
156 case bitc::RMW_MAX: return AtomicRMWInst::Max;
157 case bitc::RMW_MIN: return AtomicRMWInst::Min;
158 case bitc::RMW_UMAX: return AtomicRMWInst::UMax;
159 case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
163 static AtomicOrdering GetDecodedOrdering(unsigned Val) {
165 case bitc::ORDERING_NOTATOMIC: return NotAtomic;
166 case bitc::ORDERING_UNORDERED: return Unordered;
167 case bitc::ORDERING_MONOTONIC: return Monotonic;
168 case bitc::ORDERING_ACQUIRE: return Acquire;
169 case bitc::ORDERING_RELEASE: return Release;
170 case bitc::ORDERING_ACQREL: return AcquireRelease;
171 default: // Map unknown orderings to sequentially-consistent.
172 case bitc::ORDERING_SEQCST: return SequentiallyConsistent;
176 static SynchronizationScope GetDecodedSynchScope(unsigned Val) {
178 case bitc::SYNCHSCOPE_SINGLETHREAD: return SingleThread;
179 default: // Map unknown scopes to cross-thread.
180 case bitc::SYNCHSCOPE_CROSSTHREAD: return CrossThread;
186 /// @brief A class for maintaining the slot number definition
187 /// as a placeholder for the actual definition for forward constants defs.
188 class ConstantPlaceHolder : public ConstantExpr {
189 void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
191 // allocate space for exactly one operand
192 void *operator new(size_t s) {
193 return User::operator new(s, 1);
195 explicit ConstantPlaceHolder(Type *Ty, LLVMContext& Context)
196 : ConstantExpr(Ty, Instruction::UserOp1, &Op<0>(), 1) {
197 Op<0>() = UndefValue::get(Type::getInt32Ty(Context));
200 /// @brief Methods to support type inquiry through isa, cast, and dyn_cast.
201 //static inline bool classof(const ConstantPlaceHolder *) { return true; }
202 static bool classof(const Value *V) {
203 return isa<ConstantExpr>(V) &&
204 cast<ConstantExpr>(V)->getOpcode() == Instruction::UserOp1;
208 /// Provide fast operand accessors
209 //DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
213 // FIXME: can we inherit this from ConstantExpr?
215 struct OperandTraits<ConstantPlaceHolder> :
216 public FixedNumOperandTraits<ConstantPlaceHolder, 1> {
221 void BitcodeReaderValueList::AssignValue(Value *V, unsigned Idx) {
230 WeakVH &OldV = ValuePtrs[Idx];
236 // Handle constants and non-constants (e.g. instrs) differently for
238 if (Constant *PHC = dyn_cast<Constant>(&*OldV)) {
239 ResolveConstants.push_back(std::make_pair(PHC, Idx));
242 // If there was a forward reference to this value, replace it.
243 Value *PrevVal = OldV;
244 OldV->replaceAllUsesWith(V);
250 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
255 if (Value *V = ValuePtrs[Idx]) {
256 assert(Ty == V->getType() && "Type mismatch in constant table!");
257 return cast<Constant>(V);
260 // Create and return a placeholder, which will later be RAUW'd.
261 Constant *C = new ConstantPlaceHolder(Ty, Context);
266 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, Type *Ty) {
270 if (Value *V = ValuePtrs[Idx]) {
271 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
275 // No type specified, must be invalid reference.
276 if (Ty == 0) return 0;
278 // Create and return a placeholder, which will later be RAUW'd.
279 Value *V = new Argument(Ty);
284 /// ResolveConstantForwardRefs - Once all constants are read, this method bulk
285 /// resolves any forward references. The idea behind this is that we sometimes
286 /// get constants (such as large arrays) which reference *many* forward ref
287 /// constants. Replacing each of these causes a lot of thrashing when
288 /// building/reuniquing the constant. Instead of doing this, we look at all the
289 /// uses and rewrite all the place holders at once for any constant that uses
291 void BitcodeReaderValueList::ResolveConstantForwardRefs() {
292 // Sort the values by-pointer so that they are efficient to look up with a
294 std::sort(ResolveConstants.begin(), ResolveConstants.end());
296 SmallVector<Constant*, 64> NewOps;
298 while (!ResolveConstants.empty()) {
299 Value *RealVal = operator[](ResolveConstants.back().second);
300 Constant *Placeholder = ResolveConstants.back().first;
301 ResolveConstants.pop_back();
303 // Loop over all users of the placeholder, updating them to reference the
304 // new value. If they reference more than one placeholder, update them all
306 while (!Placeholder->use_empty()) {
307 Value::use_iterator UI = Placeholder->use_begin();
310 // If the using object isn't uniqued, just update the operands. This
311 // handles instructions and initializers for global variables.
312 if (!isa<Constant>(U) || isa<GlobalValue>(U)) {
313 UI.getUse().set(RealVal);
317 // Otherwise, we have a constant that uses the placeholder. Replace that
318 // constant with a new constant that has *all* placeholder uses updated.
319 Constant *UserC = cast<Constant>(U);
320 for (User::op_iterator I = UserC->op_begin(), E = UserC->op_end();
323 if (!isa<ConstantPlaceHolder>(*I)) {
324 // Not a placeholder reference.
326 } else if (*I == Placeholder) {
327 // Common case is that it just references this one placeholder.
330 // Otherwise, look up the placeholder in ResolveConstants.
331 ResolveConstantsTy::iterator It =
332 std::lower_bound(ResolveConstants.begin(), ResolveConstants.end(),
333 std::pair<Constant*, unsigned>(cast<Constant>(*I),
335 assert(It != ResolveConstants.end() && It->first == *I);
336 NewOp = operator[](It->second);
339 NewOps.push_back(cast<Constant>(NewOp));
342 // Make the new constant.
344 if (ConstantArray *UserCA = dyn_cast<ConstantArray>(UserC)) {
345 NewC = ConstantArray::get(UserCA->getType(), NewOps);
346 } else if (ConstantStruct *UserCS = dyn_cast<ConstantStruct>(UserC)) {
347 NewC = ConstantStruct::get(UserCS->getType(), NewOps);
348 } else if (isa<ConstantVector>(UserC)) {
349 NewC = ConstantVector::get(NewOps);
351 assert(isa<ConstantExpr>(UserC) && "Must be a ConstantExpr.");
352 NewC = cast<ConstantExpr>(UserC)->getWithOperands(NewOps);
355 UserC->replaceAllUsesWith(NewC);
356 UserC->destroyConstant();
360 // Update all ValueHandles, they should be the only users at this point.
361 Placeholder->replaceAllUsesWith(RealVal);
366 void BitcodeReaderMDValueList::AssignValue(Value *V, unsigned Idx) {
375 WeakVH &OldV = MDValuePtrs[Idx];
381 // If there was a forward reference to this value, replace it.
382 MDNode *PrevVal = cast<MDNode>(OldV);
383 OldV->replaceAllUsesWith(V);
384 MDNode::deleteTemporary(PrevVal);
385 // Deleting PrevVal sets Idx value in MDValuePtrs to null. Set new
387 MDValuePtrs[Idx] = V;
390 Value *BitcodeReaderMDValueList::getValueFwdRef(unsigned Idx) {
394 if (Value *V = MDValuePtrs[Idx]) {
395 assert(V->getType()->isMetadataTy() && "Type mismatch in value table!");
399 // Create and return a placeholder, which will later be RAUW'd.
400 Value *V = MDNode::getTemporary(Context, ArrayRef<Value*>());
401 MDValuePtrs[Idx] = V;
405 Type *BitcodeReader::getTypeByID(unsigned ID) {
406 // The type table size is always specified correctly.
407 if (ID >= TypeList.size())
410 if (Type *Ty = TypeList[ID])
413 // If we have a forward reference, the only possible case is when it is to a
414 // named struct. Just create a placeholder for now.
415 return TypeList[ID] = StructType::create(Context);
419 //===----------------------------------------------------------------------===//
420 // Functions for parsing blocks from the bitcode file
421 //===----------------------------------------------------------------------===//
423 bool BitcodeReader::ParseAttributeBlock() {
424 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
425 return Error("Malformed block record");
427 if (!MAttributes.empty())
428 return Error("Multiple PARAMATTR blocks found!");
430 SmallVector<uint64_t, 64> Record;
432 SmallVector<AttributeWithIndex, 8> Attrs;
434 // Read all the records.
436 unsigned Code = Stream.ReadCode();
437 if (Code == bitc::END_BLOCK) {
438 if (Stream.ReadBlockEnd())
439 return Error("Error at end of PARAMATTR block");
443 if (Code == bitc::ENTER_SUBBLOCK) {
444 // No known subblocks, always skip them.
445 Stream.ReadSubBlockID();
446 if (Stream.SkipBlock())
447 return Error("Malformed block record");
451 if (Code == bitc::DEFINE_ABBREV) {
452 Stream.ReadAbbrevRecord();
458 switch (Stream.ReadRecord(Code, Record)) {
459 default: // Default behavior: ignore.
461 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
462 if (Record.size() & 1)
463 return Error("Invalid ENTRY record");
465 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
466 // FIXME: remove in LLVM 3.0
467 // The alignment is stored as a 16-bit raw value from bits 31--16.
468 // We shift the bits above 31 down by 11 bits.
470 unsigned Alignment = (Record[i+1] & (0xffffull << 16)) >> 16;
471 if (Alignment && !isPowerOf2_32(Alignment))
472 return Error("Alignment is not a power of two.");
474 Attributes ReconstitutedAttr(Record[i+1] & 0xffff);
476 ReconstitutedAttr |= Attribute::constructAlignmentFromInt(Alignment);
478 Attributes((Record[i+1] & (0xffffull << 32)) >> 11);
480 Record[i+1] = ReconstitutedAttr.Raw();
483 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
484 if (Attributes(Record[i+1]) != Attribute::None)
485 Attrs.push_back(AttributeWithIndex::get(Record[i],
486 Attributes(Record[i+1])));
489 MAttributes.push_back(AttrListPtr::get(Attrs));
497 bool BitcodeReader::ParseTypeTable() {
498 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID_NEW))
499 return Error("Malformed block record");
501 return ParseTypeTableBody();
504 bool BitcodeReader::ParseTypeTableBody() {
505 if (!TypeList.empty())
506 return Error("Multiple TYPE_BLOCKs found!");
508 SmallVector<uint64_t, 64> Record;
509 unsigned NumRecords = 0;
511 SmallString<64> TypeName;
513 // Read all the records for this type table.
515 unsigned Code = Stream.ReadCode();
516 if (Code == bitc::END_BLOCK) {
517 if (NumRecords != TypeList.size())
518 return Error("Invalid type forward reference in TYPE_BLOCK");
519 if (Stream.ReadBlockEnd())
520 return Error("Error at end of type table block");
524 if (Code == bitc::ENTER_SUBBLOCK) {
525 // No known subblocks, always skip them.
526 Stream.ReadSubBlockID();
527 if (Stream.SkipBlock())
528 return Error("Malformed block record");
532 if (Code == bitc::DEFINE_ABBREV) {
533 Stream.ReadAbbrevRecord();
540 switch (Stream.ReadRecord(Code, Record)) {
541 default: return Error("unknown type in type table");
542 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
543 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
544 // type list. This allows us to reserve space.
545 if (Record.size() < 1)
546 return Error("Invalid TYPE_CODE_NUMENTRY record");
547 TypeList.resize(Record[0]);
549 case bitc::TYPE_CODE_VOID: // VOID
550 ResultTy = Type::getVoidTy(Context);
552 case bitc::TYPE_CODE_HALF: // HALF
553 ResultTy = Type::getHalfTy(Context);
555 case bitc::TYPE_CODE_FLOAT: // FLOAT
556 ResultTy = Type::getFloatTy(Context);
558 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
559 ResultTy = Type::getDoubleTy(Context);
561 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
562 ResultTy = Type::getX86_FP80Ty(Context);
564 case bitc::TYPE_CODE_FP128: // FP128
565 ResultTy = Type::getFP128Ty(Context);
567 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
568 ResultTy = Type::getPPC_FP128Ty(Context);
570 case bitc::TYPE_CODE_LABEL: // LABEL
571 ResultTy = Type::getLabelTy(Context);
573 case bitc::TYPE_CODE_METADATA: // METADATA
574 ResultTy = Type::getMetadataTy(Context);
576 case bitc::TYPE_CODE_X86_MMX: // X86_MMX
577 ResultTy = Type::getX86_MMXTy(Context);
579 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
580 if (Record.size() < 1)
581 return Error("Invalid Integer type record");
583 ResultTy = IntegerType::get(Context, Record[0]);
585 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
586 // [pointee type, address space]
587 if (Record.size() < 1)
588 return Error("Invalid POINTER type record");
589 unsigned AddressSpace = 0;
590 if (Record.size() == 2)
591 AddressSpace = Record[1];
592 ResultTy = getTypeByID(Record[0]);
593 if (ResultTy == 0) return Error("invalid element type in pointer type");
594 ResultTy = PointerType::get(ResultTy, AddressSpace);
597 case bitc::TYPE_CODE_FUNCTION_OLD: {
598 // FIXME: attrid is dead, remove it in LLVM 4.0
599 // FUNCTION: [vararg, attrid, retty, paramty x N]
600 if (Record.size() < 3)
601 return Error("Invalid FUNCTION type record");
602 SmallVector<Type*, 8> ArgTys;
603 for (unsigned i = 3, e = Record.size(); i != e; ++i) {
604 if (Type *T = getTypeByID(Record[i]))
610 ResultTy = getTypeByID(Record[2]);
611 if (ResultTy == 0 || ArgTys.size() < Record.size()-3)
612 return Error("invalid type in function type");
614 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
617 case bitc::TYPE_CODE_FUNCTION: {
618 // FUNCTION: [vararg, retty, paramty x N]
619 if (Record.size() < 2)
620 return Error("Invalid FUNCTION type record");
621 SmallVector<Type*, 8> ArgTys;
622 for (unsigned i = 2, e = Record.size(); i != e; ++i) {
623 if (Type *T = getTypeByID(Record[i]))
629 ResultTy = getTypeByID(Record[1]);
630 if (ResultTy == 0 || ArgTys.size() < Record.size()-2)
631 return Error("invalid type in function type");
633 ResultTy = FunctionType::get(ResultTy, ArgTys, Record[0]);
636 case bitc::TYPE_CODE_STRUCT_ANON: { // STRUCT: [ispacked, eltty x N]
637 if (Record.size() < 1)
638 return Error("Invalid STRUCT type record");
639 SmallVector<Type*, 8> EltTys;
640 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
641 if (Type *T = getTypeByID(Record[i]))
646 if (EltTys.size() != Record.size()-1)
647 return Error("invalid type in struct type");
648 ResultTy = StructType::get(Context, EltTys, Record[0]);
651 case bitc::TYPE_CODE_STRUCT_NAME: // STRUCT_NAME: [strchr x N]
652 if (ConvertToString(Record, 0, TypeName))
653 return Error("Invalid STRUCT_NAME record");
656 case bitc::TYPE_CODE_STRUCT_NAMED: { // STRUCT: [ispacked, eltty x N]
657 if (Record.size() < 1)
658 return Error("Invalid STRUCT type record");
660 if (NumRecords >= TypeList.size())
661 return Error("invalid TYPE table");
663 // Check to see if this was forward referenced, if so fill in the temp.
664 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
666 Res->setName(TypeName);
667 TypeList[NumRecords] = 0;
668 } else // Otherwise, create a new struct.
669 Res = StructType::create(Context, TypeName);
672 SmallVector<Type*, 8> EltTys;
673 for (unsigned i = 1, e = Record.size(); i != e; ++i) {
674 if (Type *T = getTypeByID(Record[i]))
679 if (EltTys.size() != Record.size()-1)
680 return Error("invalid STRUCT type record");
681 Res->setBody(EltTys, Record[0]);
685 case bitc::TYPE_CODE_OPAQUE: { // OPAQUE: []
686 if (Record.size() != 1)
687 return Error("Invalid OPAQUE type record");
689 if (NumRecords >= TypeList.size())
690 return Error("invalid TYPE table");
692 // Check to see if this was forward referenced, if so fill in the temp.
693 StructType *Res = cast_or_null<StructType>(TypeList[NumRecords]);
695 Res->setName(TypeName);
696 TypeList[NumRecords] = 0;
697 } else // Otherwise, create a new struct with no body.
698 Res = StructType::create(Context, TypeName);
703 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
704 if (Record.size() < 2)
705 return Error("Invalid ARRAY type record");
706 if ((ResultTy = getTypeByID(Record[1])))
707 ResultTy = ArrayType::get(ResultTy, Record[0]);
709 return Error("Invalid ARRAY type element");
711 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
712 if (Record.size() < 2)
713 return Error("Invalid VECTOR type record");
714 if ((ResultTy = getTypeByID(Record[1])))
715 ResultTy = VectorType::get(ResultTy, Record[0]);
717 return Error("Invalid ARRAY type element");
721 if (NumRecords >= TypeList.size())
722 return Error("invalid TYPE table");
723 assert(ResultTy && "Didn't read a type?");
724 assert(TypeList[NumRecords] == 0 && "Already read type?");
725 TypeList[NumRecords++] = ResultTy;
729 bool BitcodeReader::ParseValueSymbolTable() {
730 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
731 return Error("Malformed block record");
733 SmallVector<uint64_t, 64> Record;
735 // Read all the records for this value table.
736 SmallString<128> ValueName;
738 unsigned Code = Stream.ReadCode();
739 if (Code == bitc::END_BLOCK) {
740 if (Stream.ReadBlockEnd())
741 return Error("Error at end of value symbol table block");
744 if (Code == bitc::ENTER_SUBBLOCK) {
745 // No known subblocks, always skip them.
746 Stream.ReadSubBlockID();
747 if (Stream.SkipBlock())
748 return Error("Malformed block record");
752 if (Code == bitc::DEFINE_ABBREV) {
753 Stream.ReadAbbrevRecord();
759 switch (Stream.ReadRecord(Code, Record)) {
760 default: // Default behavior: unknown type.
762 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
763 if (ConvertToString(Record, 1, ValueName))
764 return Error("Invalid VST_ENTRY record");
765 unsigned ValueID = Record[0];
766 if (ValueID >= ValueList.size())
767 return Error("Invalid Value ID in VST_ENTRY record");
768 Value *V = ValueList[ValueID];
770 V->setName(StringRef(ValueName.data(), ValueName.size()));
774 case bitc::VST_CODE_BBENTRY: {
775 if (ConvertToString(Record, 1, ValueName))
776 return Error("Invalid VST_BBENTRY record");
777 BasicBlock *BB = getBasicBlock(Record[0]);
779 return Error("Invalid BB ID in VST_BBENTRY record");
781 BB->setName(StringRef(ValueName.data(), ValueName.size()));
789 bool BitcodeReader::ParseMetadata() {
790 unsigned NextMDValueNo = MDValueList.size();
792 if (Stream.EnterSubBlock(bitc::METADATA_BLOCK_ID))
793 return Error("Malformed block record");
795 SmallVector<uint64_t, 64> Record;
797 // Read all the records.
799 unsigned Code = Stream.ReadCode();
800 if (Code == bitc::END_BLOCK) {
801 if (Stream.ReadBlockEnd())
802 return Error("Error at end of PARAMATTR block");
806 if (Code == bitc::ENTER_SUBBLOCK) {
807 // No known subblocks, always skip them.
808 Stream.ReadSubBlockID();
809 if (Stream.SkipBlock())
810 return Error("Malformed block record");
814 if (Code == bitc::DEFINE_ABBREV) {
815 Stream.ReadAbbrevRecord();
819 bool IsFunctionLocal = false;
822 Code = Stream.ReadRecord(Code, Record);
824 default: // Default behavior: ignore.
826 case bitc::METADATA_NAME: {
827 // Read named of the named metadata.
828 unsigned NameLength = Record.size();
830 Name.resize(NameLength);
831 for (unsigned i = 0; i != NameLength; ++i)
834 Code = Stream.ReadCode();
836 // METADATA_NAME is always followed by METADATA_NAMED_NODE.
837 unsigned NextBitCode = Stream.ReadRecord(Code, Record);
838 assert(NextBitCode == bitc::METADATA_NAMED_NODE); (void)NextBitCode;
840 // Read named metadata elements.
841 unsigned Size = Record.size();
842 NamedMDNode *NMD = TheModule->getOrInsertNamedMetadata(Name);
843 for (unsigned i = 0; i != Size; ++i) {
844 MDNode *MD = dyn_cast<MDNode>(MDValueList.getValueFwdRef(Record[i]));
846 return Error("Malformed metadata record");
851 case bitc::METADATA_FN_NODE:
852 IsFunctionLocal = true;
854 case bitc::METADATA_NODE: {
855 if (Record.size() % 2 == 1)
856 return Error("Invalid METADATA_NODE record");
858 unsigned Size = Record.size();
859 SmallVector<Value*, 8> Elts;
860 for (unsigned i = 0; i != Size; i += 2) {
861 Type *Ty = getTypeByID(Record[i]);
862 if (!Ty) return Error("Invalid METADATA_NODE record");
863 if (Ty->isMetadataTy())
864 Elts.push_back(MDValueList.getValueFwdRef(Record[i+1]));
865 else if (!Ty->isVoidTy())
866 Elts.push_back(ValueList.getValueFwdRef(Record[i+1], Ty));
868 Elts.push_back(NULL);
870 Value *V = MDNode::getWhenValsUnresolved(Context, Elts, IsFunctionLocal);
871 IsFunctionLocal = false;
872 MDValueList.AssignValue(V, NextMDValueNo++);
875 case bitc::METADATA_STRING: {
876 unsigned MDStringLength = Record.size();
877 SmallString<8> String;
878 String.resize(MDStringLength);
879 for (unsigned i = 0; i != MDStringLength; ++i)
880 String[i] = Record[i];
881 Value *V = MDString::get(Context,
882 StringRef(String.data(), String.size()));
883 MDValueList.AssignValue(V, NextMDValueNo++);
886 case bitc::METADATA_KIND: {
887 unsigned RecordLength = Record.size();
888 if (Record.empty() || RecordLength < 2)
889 return Error("Invalid METADATA_KIND record");
891 Name.resize(RecordLength-1);
892 unsigned Kind = Record[0];
893 for (unsigned i = 1; i != RecordLength; ++i)
894 Name[i-1] = Record[i];
896 unsigned NewKind = TheModule->getMDKindID(Name.str());
897 if (!MDKindMap.insert(std::make_pair(Kind, NewKind)).second)
898 return Error("Conflicting METADATA_KIND records");
905 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
906 /// the LSB for dense VBR encoding.
907 static uint64_t DecodeSignRotatedValue(uint64_t V) {
912 // There is no such thing as -0 with integers. "-0" really means MININT.
916 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
917 /// values and aliases that we can.
918 bool BitcodeReader::ResolveGlobalAndAliasInits() {
919 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
920 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
922 GlobalInitWorklist.swap(GlobalInits);
923 AliasInitWorklist.swap(AliasInits);
925 while (!GlobalInitWorklist.empty()) {
926 unsigned ValID = GlobalInitWorklist.back().second;
927 if (ValID >= ValueList.size()) {
928 // Not ready to resolve this yet, it requires something later in the file.
929 GlobalInits.push_back(GlobalInitWorklist.back());
931 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
932 GlobalInitWorklist.back().first->setInitializer(C);
934 return Error("Global variable initializer is not a constant!");
936 GlobalInitWorklist.pop_back();
939 while (!AliasInitWorklist.empty()) {
940 unsigned ValID = AliasInitWorklist.back().second;
941 if (ValID >= ValueList.size()) {
942 AliasInits.push_back(AliasInitWorklist.back());
944 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
945 AliasInitWorklist.back().first->setAliasee(C);
947 return Error("Alias initializer is not a constant!");
949 AliasInitWorklist.pop_back();
954 APInt ReadWideAPInt(const uint64_t *Vals, unsigned ActiveWords,
956 SmallVector<uint64_t, 8> Words;
957 Words.resize(ActiveWords);
958 for (unsigned i = 0; i != ActiveWords; ++i)
959 Words[i] = DecodeSignRotatedValue(Vals[i]);
961 return APInt(TypeBits, Words);
964 bool BitcodeReader::ParseConstants() {
965 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
966 return Error("Malformed block record");
968 SmallVector<uint64_t, 64> Record;
970 // Read all the records for this value table.
971 Type *CurTy = Type::getInt32Ty(Context);
972 unsigned NextCstNo = ValueList.size();
974 unsigned Code = Stream.ReadCode();
975 if (Code == bitc::END_BLOCK)
978 if (Code == bitc::ENTER_SUBBLOCK) {
979 // No known subblocks, always skip them.
980 Stream.ReadSubBlockID();
981 if (Stream.SkipBlock())
982 return Error("Malformed block record");
986 if (Code == bitc::DEFINE_ABBREV) {
987 Stream.ReadAbbrevRecord();
994 unsigned BitCode = Stream.ReadRecord(Code, Record);
996 default: // Default behavior: unknown constant
997 case bitc::CST_CODE_UNDEF: // UNDEF
998 V = UndefValue::get(CurTy);
1000 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
1002 return Error("Malformed CST_SETTYPE record");
1003 if (Record[0] >= TypeList.size())
1004 return Error("Invalid Type ID in CST_SETTYPE record");
1005 CurTy = TypeList[Record[0]];
1006 continue; // Skip the ValueList manipulation.
1007 case bitc::CST_CODE_NULL: // NULL
1008 V = Constant::getNullValue(CurTy);
1010 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
1011 if (!CurTy->isIntegerTy() || Record.empty())
1012 return Error("Invalid CST_INTEGER record");
1013 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
1015 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
1016 if (!CurTy->isIntegerTy() || Record.empty())
1017 return Error("Invalid WIDE_INTEGER record");
1019 unsigned NumWords = Record.size();
1021 APInt VInt = ReadWideAPInt(&Record[0], NumWords,
1022 cast<IntegerType>(CurTy)->getBitWidth());
1023 V = ConstantInt::get(Context, VInt);
1027 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
1029 return Error("Invalid FLOAT record");
1030 if (CurTy->isHalfTy())
1031 V = ConstantFP::get(Context, APFloat(APInt(16, (uint16_t)Record[0])));
1032 else if (CurTy->isFloatTy())
1033 V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0])));
1034 else if (CurTy->isDoubleTy())
1035 V = ConstantFP::get(Context, APFloat(APInt(64, Record[0])));
1036 else if (CurTy->isX86_FP80Ty()) {
1037 // Bits are not stored the same way as a normal i80 APInt, compensate.
1038 uint64_t Rearrange[2];
1039 Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
1040 Rearrange[1] = Record[0] >> 48;
1041 V = ConstantFP::get(Context, APFloat(APInt(80, Rearrange)));
1042 } else if (CurTy->isFP128Ty())
1043 V = ConstantFP::get(Context, APFloat(APInt(128, Record), true));
1044 else if (CurTy->isPPC_FP128Ty())
1045 V = ConstantFP::get(Context, APFloat(APInt(128, Record)));
1047 V = UndefValue::get(CurTy);
1051 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
1053 return Error("Invalid CST_AGGREGATE record");
1055 unsigned Size = Record.size();
1056 SmallVector<Constant*, 16> Elts;
1058 if (StructType *STy = dyn_cast<StructType>(CurTy)) {
1059 for (unsigned i = 0; i != Size; ++i)
1060 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
1061 STy->getElementType(i)));
1062 V = ConstantStruct::get(STy, Elts);
1063 } else if (ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
1064 Type *EltTy = ATy->getElementType();
1065 for (unsigned i = 0; i != Size; ++i)
1066 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1067 V = ConstantArray::get(ATy, Elts);
1068 } else if (VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
1069 Type *EltTy = VTy->getElementType();
1070 for (unsigned i = 0; i != Size; ++i)
1071 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
1072 V = ConstantVector::get(Elts);
1074 V = UndefValue::get(CurTy);
1078 case bitc::CST_CODE_STRING: // STRING: [values]
1079 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
1081 return Error("Invalid CST_STRING record");
1083 unsigned Size = Record.size();
1084 SmallString<16> Elts;
1085 for (unsigned i = 0; i != Size; ++i)
1086 Elts.push_back(Record[i]);
1087 V = ConstantDataArray::getString(Context, Elts,
1088 BitCode == bitc::CST_CODE_CSTRING);
1091 case bitc::CST_CODE_DATA: {// DATA: [n x value]
1093 return Error("Invalid CST_DATA record");
1095 Type *EltTy = cast<SequentialType>(CurTy)->getElementType();
1096 unsigned Size = Record.size();
1098 if (EltTy->isIntegerTy(8)) {
1099 SmallVector<uint8_t, 16> Elts(Record.begin(), Record.end());
1100 if (isa<VectorType>(CurTy))
1101 V = ConstantDataVector::get(Context, Elts);
1103 V = ConstantDataArray::get(Context, Elts);
1104 } else if (EltTy->isIntegerTy(16)) {
1105 SmallVector<uint16_t, 16> Elts(Record.begin(), Record.end());
1106 if (isa<VectorType>(CurTy))
1107 V = ConstantDataVector::get(Context, Elts);
1109 V = ConstantDataArray::get(Context, Elts);
1110 } else if (EltTy->isIntegerTy(32)) {
1111 SmallVector<uint32_t, 16> Elts(Record.begin(), Record.end());
1112 if (isa<VectorType>(CurTy))
1113 V = ConstantDataVector::get(Context, Elts);
1115 V = ConstantDataArray::get(Context, Elts);
1116 } else if (EltTy->isIntegerTy(64)) {
1117 SmallVector<uint64_t, 16> Elts(Record.begin(), Record.end());
1118 if (isa<VectorType>(CurTy))
1119 V = ConstantDataVector::get(Context, Elts);
1121 V = ConstantDataArray::get(Context, Elts);
1122 } else if (EltTy->isFloatTy()) {
1123 SmallVector<float, 16> Elts;
1124 for (unsigned i = 0; i != Size; ++i) {
1125 union { uint32_t I; float F; };
1129 if (isa<VectorType>(CurTy))
1130 V = ConstantDataVector::get(Context, Elts);
1132 V = ConstantDataArray::get(Context, Elts);
1133 } else if (EltTy->isDoubleTy()) {
1134 SmallVector<double, 16> Elts;
1135 for (unsigned i = 0; i != Size; ++i) {
1136 union { uint64_t I; double F; };
1140 if (isa<VectorType>(CurTy))
1141 V = ConstantDataVector::get(Context, Elts);
1143 V = ConstantDataArray::get(Context, Elts);
1145 return Error("Unknown element type in CE_DATA");
1150 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
1151 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
1152 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
1154 V = UndefValue::get(CurTy); // Unknown binop.
1156 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
1157 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
1159 if (Record.size() >= 4) {
1160 if (Opc == Instruction::Add ||
1161 Opc == Instruction::Sub ||
1162 Opc == Instruction::Mul ||
1163 Opc == Instruction::Shl) {
1164 if (Record[3] & (1 << bitc::OBO_NO_SIGNED_WRAP))
1165 Flags |= OverflowingBinaryOperator::NoSignedWrap;
1166 if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
1167 Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
1168 } else if (Opc == Instruction::SDiv ||
1169 Opc == Instruction::UDiv ||
1170 Opc == Instruction::LShr ||
1171 Opc == Instruction::AShr) {
1172 if (Record[3] & (1 << bitc::PEO_EXACT))
1173 Flags |= SDivOperator::IsExact;
1176 V = ConstantExpr::get(Opc, LHS, RHS, Flags);
1180 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
1181 if (Record.size() < 3) return Error("Invalid CE_CAST record");
1182 int Opc = GetDecodedCastOpcode(Record[0]);
1184 V = UndefValue::get(CurTy); // Unknown cast.
1186 Type *OpTy = getTypeByID(Record[1]);
1187 if (!OpTy) return Error("Invalid CE_CAST record");
1188 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
1189 V = ConstantExpr::getCast(Opc, Op, CurTy);
1193 case bitc::CST_CODE_CE_INBOUNDS_GEP:
1194 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
1195 if (Record.size() & 1) return Error("Invalid CE_GEP record");
1196 SmallVector<Constant*, 16> Elts;
1197 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
1198 Type *ElTy = getTypeByID(Record[i]);
1199 if (!ElTy) return Error("Invalid CE_GEP record");
1200 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
1202 ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
1203 V = ConstantExpr::getGetElementPtr(Elts[0], Indices,
1205 bitc::CST_CODE_CE_INBOUNDS_GEP);
1208 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
1209 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
1210 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
1211 Type::getInt1Ty(Context)),
1212 ValueList.getConstantFwdRef(Record[1],CurTy),
1213 ValueList.getConstantFwdRef(Record[2],CurTy));
1215 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
1216 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
1218 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1219 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
1220 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1221 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1222 V = ConstantExpr::getExtractElement(Op0, Op1);
1225 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
1226 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1227 if (Record.size() < 3 || OpTy == 0)
1228 return Error("Invalid CE_INSERTELT record");
1229 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1230 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
1231 OpTy->getElementType());
1232 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::getInt32Ty(Context));
1233 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
1236 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
1237 VectorType *OpTy = dyn_cast<VectorType>(CurTy);
1238 if (Record.size() < 3 || OpTy == 0)
1239 return Error("Invalid CE_SHUFFLEVEC record");
1240 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
1241 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
1242 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1243 OpTy->getNumElements());
1244 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
1245 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1248 case bitc::CST_CODE_CE_SHUFVEC_EX: { // [opty, opval, opval, opval]
1249 VectorType *RTy = dyn_cast<VectorType>(CurTy);
1251 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
1252 if (Record.size() < 4 || RTy == 0 || OpTy == 0)
1253 return Error("Invalid CE_SHUFVEC_EX record");
1254 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1255 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1256 Type *ShufTy = VectorType::get(Type::getInt32Ty(Context),
1257 RTy->getNumElements());
1258 Constant *Op2 = ValueList.getConstantFwdRef(Record[3], ShufTy);
1259 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
1262 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
1263 if (Record.size() < 4) return Error("Invalid CE_CMP record");
1264 Type *OpTy = getTypeByID(Record[0]);
1265 if (OpTy == 0) return Error("Invalid CE_CMP record");
1266 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
1267 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
1269 if (OpTy->isFPOrFPVectorTy())
1270 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
1272 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
1275 case bitc::CST_CODE_INLINEASM: {
1276 if (Record.size() < 2) return Error("Invalid INLINEASM record");
1277 std::string AsmStr, ConstrStr;
1278 bool HasSideEffects = Record[0] & 1;
1279 bool IsAlignStack = Record[0] >> 1;
1280 unsigned AsmStrSize = Record[1];
1281 if (2+AsmStrSize >= Record.size())
1282 return Error("Invalid INLINEASM record");
1283 unsigned ConstStrSize = Record[2+AsmStrSize];
1284 if (3+AsmStrSize+ConstStrSize > Record.size())
1285 return Error("Invalid INLINEASM record");
1287 for (unsigned i = 0; i != AsmStrSize; ++i)
1288 AsmStr += (char)Record[2+i];
1289 for (unsigned i = 0; i != ConstStrSize; ++i)
1290 ConstrStr += (char)Record[3+AsmStrSize+i];
1291 PointerType *PTy = cast<PointerType>(CurTy);
1292 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
1293 AsmStr, ConstrStr, HasSideEffects, IsAlignStack);
1296 case bitc::CST_CODE_BLOCKADDRESS:{
1297 if (Record.size() < 3) return Error("Invalid CE_BLOCKADDRESS record");
1298 Type *FnTy = getTypeByID(Record[0]);
1299 if (FnTy == 0) return Error("Invalid CE_BLOCKADDRESS record");
1301 dyn_cast_or_null<Function>(ValueList.getConstantFwdRef(Record[1],FnTy));
1302 if (Fn == 0) return Error("Invalid CE_BLOCKADDRESS record");
1304 GlobalVariable *FwdRef = new GlobalVariable(*Fn->getParent(),
1305 Type::getInt8Ty(Context),
1306 false, GlobalValue::InternalLinkage,
1308 BlockAddrFwdRefs[Fn].push_back(std::make_pair(Record[2], FwdRef));
1314 ValueList.AssignValue(V, NextCstNo);
1318 if (NextCstNo != ValueList.size())
1319 return Error("Invalid constant reference!");
1321 if (Stream.ReadBlockEnd())
1322 return Error("Error at end of constants block");
1324 // Once all the constants have been read, go through and resolve forward
1326 ValueList.ResolveConstantForwardRefs();
1330 bool BitcodeReader::ParseUseLists() {
1331 if (Stream.EnterSubBlock(bitc::USELIST_BLOCK_ID))
1332 return Error("Malformed block record");
1334 SmallVector<uint64_t, 64> Record;
1336 // Read all the records.
1338 unsigned Code = Stream.ReadCode();
1339 if (Code == bitc::END_BLOCK) {
1340 if (Stream.ReadBlockEnd())
1341 return Error("Error at end of use-list table block");
1345 if (Code == bitc::ENTER_SUBBLOCK) {
1346 // No known subblocks, always skip them.
1347 Stream.ReadSubBlockID();
1348 if (Stream.SkipBlock())
1349 return Error("Malformed block record");
1353 if (Code == bitc::DEFINE_ABBREV) {
1354 Stream.ReadAbbrevRecord();
1358 // Read a use list record.
1360 switch (Stream.ReadRecord(Code, Record)) {
1361 default: // Default behavior: unknown type.
1363 case bitc::USELIST_CODE_ENTRY: { // USELIST_CODE_ENTRY: TBD.
1364 unsigned RecordLength = Record.size();
1365 if (RecordLength < 1)
1366 return Error ("Invalid UseList reader!");
1367 UseListRecords.push_back(Record);
1374 /// RememberAndSkipFunctionBody - When we see the block for a function body,
1375 /// remember where it is and then skip it. This lets us lazily deserialize the
1377 bool BitcodeReader::RememberAndSkipFunctionBody() {
1378 // Get the function we are talking about.
1379 if (FunctionsWithBodies.empty())
1380 return Error("Insufficient function protos");
1382 Function *Fn = FunctionsWithBodies.back();
1383 FunctionsWithBodies.pop_back();
1385 // Save the current stream state.
1386 uint64_t CurBit = Stream.GetCurrentBitNo();
1387 DeferredFunctionInfo[Fn] = CurBit;
1389 // Skip over the function block for now.
1390 if (Stream.SkipBlock())
1391 return Error("Malformed block record");
1395 bool BitcodeReader::GlobalCleanup() {
1396 // Patch the initializers for globals and aliases up.
1397 ResolveGlobalAndAliasInits();
1398 if (!GlobalInits.empty() || !AliasInits.empty())
1399 return Error("Malformed global initializer set");
1401 // Look for intrinsic functions which need to be upgraded at some point
1402 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
1405 if (UpgradeIntrinsicFunction(FI, NewFn))
1406 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
1409 // Look for global variables which need to be renamed.
1410 for (Module::global_iterator
1411 GI = TheModule->global_begin(), GE = TheModule->global_end();
1413 UpgradeGlobalVariable(GI);
1414 // Force deallocation of memory for these vectors to favor the client that
1415 // want lazy deserialization.
1416 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
1417 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
1421 bool BitcodeReader::ParseModule(bool Resume) {
1423 Stream.JumpToBit(NextUnreadBit);
1424 else if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1425 return Error("Malformed block record");
1427 SmallVector<uint64_t, 64> Record;
1428 std::vector<std::string> SectionTable;
1429 std::vector<std::string> GCTable;
1431 // Read all the records for this module.
1432 while (!Stream.AtEndOfStream()) {
1433 unsigned Code = Stream.ReadCode();
1434 if (Code == bitc::END_BLOCK) {
1435 if (Stream.ReadBlockEnd())
1436 return Error("Error at end of module block");
1438 return GlobalCleanup();
1441 if (Code == bitc::ENTER_SUBBLOCK) {
1442 switch (Stream.ReadSubBlockID()) {
1443 default: // Skip unknown content.
1444 if (Stream.SkipBlock())
1445 return Error("Malformed block record");
1447 case bitc::BLOCKINFO_BLOCK_ID:
1448 if (Stream.ReadBlockInfoBlock())
1449 return Error("Malformed BlockInfoBlock");
1451 case bitc::PARAMATTR_BLOCK_ID:
1452 if (ParseAttributeBlock())
1455 case bitc::TYPE_BLOCK_ID_NEW:
1456 if (ParseTypeTable())
1459 case bitc::VALUE_SYMTAB_BLOCK_ID:
1460 if (ParseValueSymbolTable())
1462 SeenValueSymbolTable = true;
1464 case bitc::CONSTANTS_BLOCK_ID:
1465 if (ParseConstants() || ResolveGlobalAndAliasInits())
1468 case bitc::METADATA_BLOCK_ID:
1469 if (ParseMetadata())
1472 case bitc::FUNCTION_BLOCK_ID:
1473 // If this is the first function body we've seen, reverse the
1474 // FunctionsWithBodies list.
1475 if (!SeenFirstFunctionBody) {
1476 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
1477 if (GlobalCleanup())
1479 SeenFirstFunctionBody = true;
1482 if (RememberAndSkipFunctionBody())
1484 // For streaming bitcode, suspend parsing when we reach the function
1485 // bodies. Subsequent materialization calls will resume it when
1486 // necessary. For streaming, the function bodies must be at the end of
1487 // the bitcode. If the bitcode file is old, the symbol table will be
1488 // at the end instead and will not have been seen yet. In this case,
1489 // just finish the parse now.
1490 if (LazyStreamer && SeenValueSymbolTable) {
1491 NextUnreadBit = Stream.GetCurrentBitNo();
1495 case bitc::USELIST_BLOCK_ID:
1496 if (ParseUseLists())
1503 if (Code == bitc::DEFINE_ABBREV) {
1504 Stream.ReadAbbrevRecord();
1509 switch (Stream.ReadRecord(Code, Record)) {
1510 default: break; // Default behavior, ignore unknown content.
1511 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1512 if (Record.size() < 1)
1513 return Error("Malformed MODULE_CODE_VERSION");
1514 // Only version #0 is supported so far.
1516 return Error("Unknown bitstream version!");
1518 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1520 if (ConvertToString(Record, 0, S))
1521 return Error("Invalid MODULE_CODE_TRIPLE record");
1522 TheModule->setTargetTriple(S);
1525 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
1527 if (ConvertToString(Record, 0, S))
1528 return Error("Invalid MODULE_CODE_DATALAYOUT record");
1529 TheModule->setDataLayout(S);
1532 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
1534 if (ConvertToString(Record, 0, S))
1535 return Error("Invalid MODULE_CODE_ASM record");
1536 TheModule->setModuleInlineAsm(S);
1539 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
1541 if (ConvertToString(Record, 0, S))
1542 return Error("Invalid MODULE_CODE_DEPLIB record");
1543 TheModule->addLibrary(S);
1546 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
1548 if (ConvertToString(Record, 0, S))
1549 return Error("Invalid MODULE_CODE_SECTIONNAME record");
1550 SectionTable.push_back(S);
1553 case bitc::MODULE_CODE_GCNAME: { // SECTIONNAME: [strchr x N]
1555 if (ConvertToString(Record, 0, S))
1556 return Error("Invalid MODULE_CODE_GCNAME record");
1557 GCTable.push_back(S);
1560 // GLOBALVAR: [pointer type, isconst, initid,
1561 // linkage, alignment, section, visibility, threadlocal,
1563 case bitc::MODULE_CODE_GLOBALVAR: {
1564 if (Record.size() < 6)
1565 return Error("Invalid MODULE_CODE_GLOBALVAR record");
1566 Type *Ty = getTypeByID(Record[0]);
1567 if (!Ty) return Error("Invalid MODULE_CODE_GLOBALVAR record");
1568 if (!Ty->isPointerTy())
1569 return Error("Global not a pointer type!");
1570 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1571 Ty = cast<PointerType>(Ty)->getElementType();
1573 bool isConstant = Record[1];
1574 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1575 unsigned Alignment = (1 << Record[4]) >> 1;
1576 std::string Section;
1578 if (Record[5]-1 >= SectionTable.size())
1579 return Error("Invalid section ID");
1580 Section = SectionTable[Record[5]-1];
1582 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1583 if (Record.size() > 6)
1584 Visibility = GetDecodedVisibility(Record[6]);
1585 bool isThreadLocal = false;
1586 if (Record.size() > 7)
1587 isThreadLocal = Record[7];
1589 bool UnnamedAddr = false;
1590 if (Record.size() > 8)
1591 UnnamedAddr = Record[8];
1593 GlobalVariable *NewGV =
1594 new GlobalVariable(*TheModule, Ty, isConstant, Linkage, 0, "", 0,
1595 isThreadLocal, AddressSpace);
1596 NewGV->setAlignment(Alignment);
1597 if (!Section.empty())
1598 NewGV->setSection(Section);
1599 NewGV->setVisibility(Visibility);
1600 NewGV->setThreadLocal(isThreadLocal);
1601 NewGV->setUnnamedAddr(UnnamedAddr);
1603 ValueList.push_back(NewGV);
1605 // Remember which value to use for the global initializer.
1606 if (unsigned InitID = Record[2])
1607 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1610 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1611 // alignment, section, visibility, gc, unnamed_addr]
1612 case bitc::MODULE_CODE_FUNCTION: {
1613 if (Record.size() < 8)
1614 return Error("Invalid MODULE_CODE_FUNCTION record");
1615 Type *Ty = getTypeByID(Record[0]);
1616 if (!Ty) return Error("Invalid MODULE_CODE_FUNCTION record");
1617 if (!Ty->isPointerTy())
1618 return Error("Function not a pointer type!");
1620 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1622 return Error("Function not a pointer to function type!");
1624 Function *Func = Function::Create(FTy, GlobalValue::ExternalLinkage,
1627 Func->setCallingConv(static_cast<CallingConv::ID>(Record[1]));
1628 bool isProto = Record[2];
1629 Func->setLinkage(GetDecodedLinkage(Record[3]));
1630 Func->setAttributes(getAttributes(Record[4]));
1632 Func->setAlignment((1 << Record[5]) >> 1);
1634 if (Record[6]-1 >= SectionTable.size())
1635 return Error("Invalid section ID");
1636 Func->setSection(SectionTable[Record[6]-1]);
1638 Func->setVisibility(GetDecodedVisibility(Record[7]));
1639 if (Record.size() > 8 && Record[8]) {
1640 if (Record[8]-1 > GCTable.size())
1641 return Error("Invalid GC ID");
1642 Func->setGC(GCTable[Record[8]-1].c_str());
1644 bool UnnamedAddr = false;
1645 if (Record.size() > 9)
1646 UnnamedAddr = Record[9];
1647 Func->setUnnamedAddr(UnnamedAddr);
1648 ValueList.push_back(Func);
1650 // If this is a function with a body, remember the prototype we are
1651 // creating now, so that we can match up the body with them later.
1653 FunctionsWithBodies.push_back(Func);
1654 if (LazyStreamer) DeferredFunctionInfo[Func] = 0;
1658 // ALIAS: [alias type, aliasee val#, linkage]
1659 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1660 case bitc::MODULE_CODE_ALIAS: {
1661 if (Record.size() < 3)
1662 return Error("Invalid MODULE_ALIAS record");
1663 Type *Ty = getTypeByID(Record[0]);
1664 if (!Ty) return Error("Invalid MODULE_ALIAS record");
1665 if (!Ty->isPointerTy())
1666 return Error("Function not a pointer type!");
1668 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1670 // Old bitcode files didn't have visibility field.
1671 if (Record.size() > 3)
1672 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1673 ValueList.push_back(NewGA);
1674 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1677 /// MODULE_CODE_PURGEVALS: [numvals]
1678 case bitc::MODULE_CODE_PURGEVALS:
1679 // Trim down the value list to the specified size.
1680 if (Record.size() < 1 || Record[0] > ValueList.size())
1681 return Error("Invalid MODULE_PURGEVALS record");
1682 ValueList.shrinkTo(Record[0]);
1688 return Error("Premature end of bitstream");
1691 bool BitcodeReader::ParseBitcodeInto(Module *M) {
1694 if (InitStream()) return true;
1696 // Sniff for the signature.
1697 if (Stream.Read(8) != 'B' ||
1698 Stream.Read(8) != 'C' ||
1699 Stream.Read(4) != 0x0 ||
1700 Stream.Read(4) != 0xC ||
1701 Stream.Read(4) != 0xE ||
1702 Stream.Read(4) != 0xD)
1703 return Error("Invalid bitcode signature");
1705 // We expect a number of well-defined blocks, though we don't necessarily
1706 // need to understand them all.
1707 while (!Stream.AtEndOfStream()) {
1708 unsigned Code = Stream.ReadCode();
1710 if (Code != bitc::ENTER_SUBBLOCK) {
1712 // The ranlib in xcode 4 will align archive members by appending newlines
1713 // to the end of them. If this file size is a multiple of 4 but not 8, we
1714 // have to read and ignore these final 4 bytes :-(
1715 if (Stream.GetAbbrevIDWidth() == 2 && Code == 2 &&
1716 Stream.Read(6) == 2 && Stream.Read(24) == 0xa0a0a &&
1717 Stream.AtEndOfStream())
1720 return Error("Invalid record at top-level");
1723 unsigned BlockID = Stream.ReadSubBlockID();
1725 // We only know the MODULE subblock ID.
1727 case bitc::BLOCKINFO_BLOCK_ID:
1728 if (Stream.ReadBlockInfoBlock())
1729 return Error("Malformed BlockInfoBlock");
1731 case bitc::MODULE_BLOCK_ID:
1732 // Reject multiple MODULE_BLOCK's in a single bitstream.
1734 return Error("Multiple MODULE_BLOCKs in same stream");
1736 if (ParseModule(false))
1738 if (LazyStreamer) return false;
1741 if (Stream.SkipBlock())
1742 return Error("Malformed block record");
1750 bool BitcodeReader::ParseModuleTriple(std::string &Triple) {
1751 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
1752 return Error("Malformed block record");
1754 SmallVector<uint64_t, 64> Record;
1756 // Read all the records for this module.
1757 while (!Stream.AtEndOfStream()) {
1758 unsigned Code = Stream.ReadCode();
1759 if (Code == bitc::END_BLOCK) {
1760 if (Stream.ReadBlockEnd())
1761 return Error("Error at end of module block");
1766 if (Code == bitc::ENTER_SUBBLOCK) {
1767 switch (Stream.ReadSubBlockID()) {
1768 default: // Skip unknown content.
1769 if (Stream.SkipBlock())
1770 return Error("Malformed block record");
1776 if (Code == bitc::DEFINE_ABBREV) {
1777 Stream.ReadAbbrevRecord();
1782 switch (Stream.ReadRecord(Code, Record)) {
1783 default: break; // Default behavior, ignore unknown content.
1784 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
1785 if (Record.size() < 1)
1786 return Error("Malformed MODULE_CODE_VERSION");
1787 // Only version #0 is supported so far.
1789 return Error("Unknown bitstream version!");
1791 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
1793 if (ConvertToString(Record, 0, S))
1794 return Error("Invalid MODULE_CODE_TRIPLE record");
1802 return Error("Premature end of bitstream");
1805 bool BitcodeReader::ParseTriple(std::string &Triple) {
1806 if (InitStream()) return true;
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)
1823 return Error("Invalid record at top-level");
1825 unsigned BlockID = Stream.ReadSubBlockID();
1827 // We only know the MODULE subblock ID.
1829 case bitc::MODULE_BLOCK_ID:
1830 if (ParseModuleTriple(Triple))
1834 if (Stream.SkipBlock())
1835 return Error("Malformed block record");
1843 /// ParseMetadataAttachment - Parse metadata attachments.
1844 bool BitcodeReader::ParseMetadataAttachment() {
1845 if (Stream.EnterSubBlock(bitc::METADATA_ATTACHMENT_ID))
1846 return Error("Malformed block record");
1848 SmallVector<uint64_t, 64> Record;
1850 unsigned Code = Stream.ReadCode();
1851 if (Code == bitc::END_BLOCK) {
1852 if (Stream.ReadBlockEnd())
1853 return Error("Error at end of PARAMATTR block");
1856 if (Code == bitc::DEFINE_ABBREV) {
1857 Stream.ReadAbbrevRecord();
1860 // Read a metadata attachment record.
1862 switch (Stream.ReadRecord(Code, Record)) {
1863 default: // Default behavior: ignore.
1865 case bitc::METADATA_ATTACHMENT: {
1866 unsigned RecordLength = Record.size();
1867 if (Record.empty() || (RecordLength - 1) % 2 == 1)
1868 return Error ("Invalid METADATA_ATTACHMENT reader!");
1869 Instruction *Inst = InstructionList[Record[0]];
1870 for (unsigned i = 1; i != RecordLength; i = i+2) {
1871 unsigned Kind = Record[i];
1872 DenseMap<unsigned, unsigned>::iterator I =
1873 MDKindMap.find(Kind);
1874 if (I == MDKindMap.end())
1875 return Error("Invalid metadata kind ID");
1876 Value *Node = MDValueList.getValueFwdRef(Record[i+1]);
1877 Inst->setMetadata(I->second, cast<MDNode>(Node));
1886 /// ParseFunctionBody - Lazily parse the specified function body block.
1887 bool BitcodeReader::ParseFunctionBody(Function *F) {
1888 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1889 return Error("Malformed block record");
1891 InstructionList.clear();
1892 unsigned ModuleValueListSize = ValueList.size();
1893 unsigned ModuleMDValueListSize = MDValueList.size();
1895 // Add all the function arguments to the value table.
1896 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1897 ValueList.push_back(I);
1899 unsigned NextValueNo = ValueList.size();
1900 BasicBlock *CurBB = 0;
1901 unsigned CurBBNo = 0;
1905 // Read all the records.
1906 SmallVector<uint64_t, 64> Record;
1908 unsigned Code = Stream.ReadCode();
1909 if (Code == bitc::END_BLOCK) {
1910 if (Stream.ReadBlockEnd())
1911 return Error("Error at end of function block");
1915 if (Code == bitc::ENTER_SUBBLOCK) {
1916 switch (Stream.ReadSubBlockID()) {
1917 default: // Skip unknown content.
1918 if (Stream.SkipBlock())
1919 return Error("Malformed block record");
1921 case bitc::CONSTANTS_BLOCK_ID:
1922 if (ParseConstants()) return true;
1923 NextValueNo = ValueList.size();
1925 case bitc::VALUE_SYMTAB_BLOCK_ID:
1926 if (ParseValueSymbolTable()) return true;
1928 case bitc::METADATA_ATTACHMENT_ID:
1929 if (ParseMetadataAttachment()) return true;
1931 case bitc::METADATA_BLOCK_ID:
1932 if (ParseMetadata()) return true;
1938 if (Code == bitc::DEFINE_ABBREV) {
1939 Stream.ReadAbbrevRecord();
1946 unsigned BitCode = Stream.ReadRecord(Code, Record);
1948 default: // Default behavior: reject
1949 return Error("Unknown instruction");
1950 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1951 if (Record.size() < 1 || Record[0] == 0)
1952 return Error("Invalid DECLAREBLOCKS record");
1953 // Create all the basic blocks for the function.
1954 FunctionBBs.resize(Record[0]);
1955 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1956 FunctionBBs[i] = BasicBlock::Create(Context, "", F);
1957 CurBB = FunctionBBs[0];
1960 case bitc::FUNC_CODE_DEBUG_LOC_AGAIN: // DEBUG_LOC_AGAIN
1961 // This record indicates that the last instruction is at the same
1962 // location as the previous instruction with a location.
1965 // Get the last instruction emitted.
1966 if (CurBB && !CurBB->empty())
1968 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1969 !FunctionBBs[CurBBNo-1]->empty())
1970 I = &FunctionBBs[CurBBNo-1]->back();
1972 if (I == 0) return Error("Invalid DEBUG_LOC_AGAIN record");
1973 I->setDebugLoc(LastLoc);
1977 case bitc::FUNC_CODE_DEBUG_LOC: { // DEBUG_LOC: [line, col, scope, ia]
1978 I = 0; // Get the last instruction emitted.
1979 if (CurBB && !CurBB->empty())
1981 else if (CurBBNo && FunctionBBs[CurBBNo-1] &&
1982 !FunctionBBs[CurBBNo-1]->empty())
1983 I = &FunctionBBs[CurBBNo-1]->back();
1984 if (I == 0 || Record.size() < 4)
1985 return Error("Invalid FUNC_CODE_DEBUG_LOC record");
1987 unsigned Line = Record[0], Col = Record[1];
1988 unsigned ScopeID = Record[2], IAID = Record[3];
1990 MDNode *Scope = 0, *IA = 0;
1991 if (ScopeID) Scope = cast<MDNode>(MDValueList.getValueFwdRef(ScopeID-1));
1992 if (IAID) IA = cast<MDNode>(MDValueList.getValueFwdRef(IAID-1));
1993 LastLoc = DebugLoc::get(Line, Col, Scope, IA);
1994 I->setDebugLoc(LastLoc);
1999 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
2002 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2003 getValue(Record, OpNum, LHS->getType(), RHS) ||
2004 OpNum+1 > Record.size())
2005 return Error("Invalid BINOP record");
2007 int Opc = GetDecodedBinaryOpcode(Record[OpNum++], LHS->getType());
2008 if (Opc == -1) return Error("Invalid BINOP record");
2009 I = BinaryOperator::Create((Instruction::BinaryOps)Opc, LHS, RHS);
2010 InstructionList.push_back(I);
2011 if (OpNum < Record.size()) {
2012 if (Opc == Instruction::Add ||
2013 Opc == Instruction::Sub ||
2014 Opc == Instruction::Mul ||
2015 Opc == Instruction::Shl) {
2016 if (Record[OpNum] & (1 << bitc::OBO_NO_SIGNED_WRAP))
2017 cast<BinaryOperator>(I)->setHasNoSignedWrap(true);
2018 if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP))
2019 cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true);
2020 } else if (Opc == Instruction::SDiv ||
2021 Opc == Instruction::UDiv ||
2022 Opc == Instruction::LShr ||
2023 Opc == Instruction::AShr) {
2024 if (Record[OpNum] & (1 << bitc::PEO_EXACT))
2025 cast<BinaryOperator>(I)->setIsExact(true);
2030 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
2033 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2034 OpNum+2 != Record.size())
2035 return Error("Invalid CAST record");
2037 Type *ResTy = getTypeByID(Record[OpNum]);
2038 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
2039 if (Opc == -1 || ResTy == 0)
2040 return Error("Invalid CAST record");
2041 I = CastInst::Create((Instruction::CastOps)Opc, Op, ResTy);
2042 InstructionList.push_back(I);
2045 case bitc::FUNC_CODE_INST_INBOUNDS_GEP:
2046 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
2049 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
2050 return Error("Invalid GEP record");
2052 SmallVector<Value*, 16> GEPIdx;
2053 while (OpNum != Record.size()) {
2055 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2056 return Error("Invalid GEP record");
2057 GEPIdx.push_back(Op);
2060 I = GetElementPtrInst::Create(BasePtr, GEPIdx);
2061 InstructionList.push_back(I);
2062 if (BitCode == bitc::FUNC_CODE_INST_INBOUNDS_GEP)
2063 cast<GetElementPtrInst>(I)->setIsInBounds(true);
2067 case bitc::FUNC_CODE_INST_EXTRACTVAL: {
2068 // EXTRACTVAL: [opty, opval, n x indices]
2071 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2072 return Error("Invalid EXTRACTVAL record");
2074 SmallVector<unsigned, 4> EXTRACTVALIdx;
2075 for (unsigned RecSize = Record.size();
2076 OpNum != RecSize; ++OpNum) {
2077 uint64_t Index = Record[OpNum];
2078 if ((unsigned)Index != Index)
2079 return Error("Invalid EXTRACTVAL index");
2080 EXTRACTVALIdx.push_back((unsigned)Index);
2083 I = ExtractValueInst::Create(Agg, EXTRACTVALIdx);
2084 InstructionList.push_back(I);
2088 case bitc::FUNC_CODE_INST_INSERTVAL: {
2089 // INSERTVAL: [opty, opval, opty, opval, n x indices]
2092 if (getValueTypePair(Record, OpNum, NextValueNo, Agg))
2093 return Error("Invalid INSERTVAL record");
2095 if (getValueTypePair(Record, OpNum, NextValueNo, Val))
2096 return Error("Invalid INSERTVAL record");
2098 SmallVector<unsigned, 4> INSERTVALIdx;
2099 for (unsigned RecSize = Record.size();
2100 OpNum != RecSize; ++OpNum) {
2101 uint64_t Index = Record[OpNum];
2102 if ((unsigned)Index != Index)
2103 return Error("Invalid INSERTVAL index");
2104 INSERTVALIdx.push_back((unsigned)Index);
2107 I = InsertValueInst::Create(Agg, Val, INSERTVALIdx);
2108 InstructionList.push_back(I);
2112 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
2113 // obsolete form of select
2114 // handles select i1 ... in old bitcode
2116 Value *TrueVal, *FalseVal, *Cond;
2117 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2118 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2119 getValue(Record, OpNum, Type::getInt1Ty(Context), Cond))
2120 return Error("Invalid SELECT record");
2122 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2123 InstructionList.push_back(I);
2127 case bitc::FUNC_CODE_INST_VSELECT: {// VSELECT: [ty,opval,opval,predty,pred]
2128 // new form of select
2129 // handles select i1 or select [N x i1]
2131 Value *TrueVal, *FalseVal, *Cond;
2132 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
2133 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
2134 getValueTypePair(Record, OpNum, NextValueNo, Cond))
2135 return Error("Invalid SELECT record");
2137 // select condition can be either i1 or [N x i1]
2138 if (VectorType* vector_type =
2139 dyn_cast<VectorType>(Cond->getType())) {
2141 if (vector_type->getElementType() != Type::getInt1Ty(Context))
2142 return Error("Invalid SELECT condition type");
2145 if (Cond->getType() != Type::getInt1Ty(Context))
2146 return Error("Invalid SELECT condition type");
2149 I = SelectInst::Create(Cond, TrueVal, FalseVal);
2150 InstructionList.push_back(I);
2154 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
2157 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2158 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2159 return Error("Invalid EXTRACTELT record");
2160 I = ExtractElementInst::Create(Vec, Idx);
2161 InstructionList.push_back(I);
2165 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
2167 Value *Vec, *Elt, *Idx;
2168 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
2169 getValue(Record, OpNum,
2170 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
2171 getValue(Record, OpNum, Type::getInt32Ty(Context), Idx))
2172 return Error("Invalid INSERTELT record");
2173 I = InsertElementInst::Create(Vec, Elt, Idx);
2174 InstructionList.push_back(I);
2178 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
2180 Value *Vec1, *Vec2, *Mask;
2181 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
2182 getValue(Record, OpNum, Vec1->getType(), Vec2))
2183 return Error("Invalid SHUFFLEVEC record");
2185 if (getValueTypePair(Record, OpNum, NextValueNo, Mask))
2186 return Error("Invalid SHUFFLEVEC record");
2187 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
2188 InstructionList.push_back(I);
2192 case bitc::FUNC_CODE_INST_CMP: // CMP: [opty, opval, opval, pred]
2193 // Old form of ICmp/FCmp returning bool
2194 // Existed to differentiate between icmp/fcmp and vicmp/vfcmp which were
2195 // both legal on vectors but had different behaviour.
2196 case bitc::FUNC_CODE_INST_CMP2: { // CMP2: [opty, opval, opval, pred]
2197 // FCmp/ICmp returning bool or vector of bool
2201 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
2202 getValue(Record, OpNum, LHS->getType(), RHS) ||
2203 OpNum+1 != Record.size())
2204 return Error("Invalid CMP record");
2206 if (LHS->getType()->isFPOrFPVectorTy())
2207 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
2209 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
2210 InstructionList.push_back(I);
2214 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
2216 unsigned Size = Record.size();
2218 I = ReturnInst::Create(Context);
2219 InstructionList.push_back(I);
2225 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2226 return Error("Invalid RET record");
2227 if (OpNum != Record.size())
2228 return Error("Invalid RET record");
2230 I = ReturnInst::Create(Context, Op);
2231 InstructionList.push_back(I);
2234 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
2235 if (Record.size() != 1 && Record.size() != 3)
2236 return Error("Invalid BR record");
2237 BasicBlock *TrueDest = getBasicBlock(Record[0]);
2239 return Error("Invalid BR record");
2241 if (Record.size() == 1) {
2242 I = BranchInst::Create(TrueDest);
2243 InstructionList.push_back(I);
2246 BasicBlock *FalseDest = getBasicBlock(Record[1]);
2247 Value *Cond = getFnValueByID(Record[2], Type::getInt1Ty(Context));
2248 if (FalseDest == 0 || Cond == 0)
2249 return Error("Invalid BR record");
2250 I = BranchInst::Create(TrueDest, FalseDest, Cond);
2251 InstructionList.push_back(I);
2255 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, op0, op1, ...]
2257 if ((Record[0] >> 16) == SWITCH_INST_MAGIC) {
2258 // New SwitchInst format with case ranges.
2260 Type *OpTy = getTypeByID(Record[1]);
2261 unsigned ValueBitWidth = cast<IntegerType>(OpTy)->getBitWidth();
2263 Value *Cond = getFnValueByID(Record[2], OpTy);
2264 BasicBlock *Default = getBasicBlock(Record[3]);
2265 if (OpTy == 0 || Cond == 0 || Default == 0)
2266 return Error("Invalid SWITCH record");
2268 unsigned NumCases = Record[4];
2270 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2271 InstructionList.push_back(SI);
2273 unsigned CurIdx = 5;
2274 for (unsigned i = 0; i != NumCases; ++i) {
2275 CRSBuilder CaseBuilder;
2276 unsigned NumItems = Record[CurIdx++];
2277 for (unsigned ci = 0; ci != NumItems; ++ci) {
2278 bool isSingleNumber = Record[CurIdx++];
2281 unsigned ActiveWords = 1;
2282 if (ValueBitWidth > 64)
2283 ActiveWords = Record[CurIdx++];
2284 Low = ReadWideAPInt(&Record[CurIdx], ActiveWords, ValueBitWidth);
2285 CurIdx += ActiveWords;
2287 if (!isSingleNumber) {
2289 if (ValueBitWidth > 64)
2290 ActiveWords = Record[CurIdx++];
2292 ReadWideAPInt(&Record[CurIdx], ActiveWords, ValueBitWidth);
2293 IntItemConstantIntImpl HighImpl =
2294 cast<ConstantInt>(ConstantInt::get(OpTy, High));
2296 CaseBuilder.add(IntItem::fromType(OpTy, Low),
2297 IntItem::fromType(OpTy, High));
2298 CurIdx += ActiveWords;
2300 CaseBuilder.add(IntItem::fromType(OpTy, Low));
2302 BasicBlock *DestBB = getBasicBlock(Record[CurIdx++]);
2303 ConstantRangesSet Case = CaseBuilder.getCase();
2304 SI->addCase(Case, DestBB);
2306 uint16_t Hash = SI->hash();
2307 if (Hash != (Record[0] & 0xFFFF))
2308 return Error("Invalid SWITCH record");
2313 // Old SwitchInst format without case ranges.
2315 if (Record.size() < 3 || (Record.size() & 1) == 0)
2316 return Error("Invalid SWITCH record");
2317 Type *OpTy = getTypeByID(Record[0]);
2318 Value *Cond = getFnValueByID(Record[1], OpTy);
2319 BasicBlock *Default = getBasicBlock(Record[2]);
2320 if (OpTy == 0 || Cond == 0 || Default == 0)
2321 return Error("Invalid SWITCH record");
2322 unsigned NumCases = (Record.size()-3)/2;
2323 SwitchInst *SI = SwitchInst::Create(Cond, Default, NumCases);
2324 InstructionList.push_back(SI);
2325 for (unsigned i = 0, e = NumCases; i != e; ++i) {
2326 ConstantInt *CaseVal =
2327 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
2328 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
2329 if (CaseVal == 0 || DestBB == 0) {
2331 return Error("Invalid SWITCH record!");
2333 SI->addCase(CaseVal, DestBB);
2338 case bitc::FUNC_CODE_INST_INDIRECTBR: { // INDIRECTBR: [opty, op0, op1, ...]
2339 if (Record.size() < 2)
2340 return Error("Invalid INDIRECTBR record");
2341 Type *OpTy = getTypeByID(Record[0]);
2342 Value *Address = getFnValueByID(Record[1], OpTy);
2343 if (OpTy == 0 || Address == 0)
2344 return Error("Invalid INDIRECTBR record");
2345 unsigned NumDests = Record.size()-2;
2346 IndirectBrInst *IBI = IndirectBrInst::Create(Address, NumDests);
2347 InstructionList.push_back(IBI);
2348 for (unsigned i = 0, e = NumDests; i != e; ++i) {
2349 if (BasicBlock *DestBB = getBasicBlock(Record[2+i])) {
2350 IBI->addDestination(DestBB);
2353 return Error("Invalid INDIRECTBR record!");
2360 case bitc::FUNC_CODE_INST_INVOKE: {
2361 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
2362 if (Record.size() < 4) return Error("Invalid INVOKE record");
2363 AttrListPtr PAL = getAttributes(Record[0]);
2364 unsigned CCInfo = Record[1];
2365 BasicBlock *NormalBB = getBasicBlock(Record[2]);
2366 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
2370 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2371 return Error("Invalid INVOKE record");
2373 PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
2374 FunctionType *FTy = !CalleeTy ? 0 :
2375 dyn_cast<FunctionType>(CalleeTy->getElementType());
2377 // Check that the right number of fixed parameters are here.
2378 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
2379 Record.size() < OpNum+FTy->getNumParams())
2380 return Error("Invalid INVOKE record");
2382 SmallVector<Value*, 16> Ops;
2383 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2384 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2385 if (Ops.back() == 0) return Error("Invalid INVOKE record");
2388 if (!FTy->isVarArg()) {
2389 if (Record.size() != OpNum)
2390 return Error("Invalid INVOKE record");
2392 // Read type/value pairs for varargs params.
2393 while (OpNum != Record.size()) {
2395 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2396 return Error("Invalid INVOKE record");
2401 I = InvokeInst::Create(Callee, NormalBB, UnwindBB, Ops);
2402 InstructionList.push_back(I);
2403 cast<InvokeInst>(I)->setCallingConv(
2404 static_cast<CallingConv::ID>(CCInfo));
2405 cast<InvokeInst>(I)->setAttributes(PAL);
2408 case bitc::FUNC_CODE_INST_RESUME: { // RESUME: [opval]
2411 if (getValueTypePair(Record, Idx, NextValueNo, Val))
2412 return Error("Invalid RESUME record");
2413 I = ResumeInst::Create(Val);
2414 InstructionList.push_back(I);
2417 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
2418 I = new UnreachableInst(Context);
2419 InstructionList.push_back(I);
2421 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
2422 if (Record.size() < 1 || ((Record.size()-1)&1))
2423 return Error("Invalid PHI record");
2424 Type *Ty = getTypeByID(Record[0]);
2425 if (!Ty) return Error("Invalid PHI record");
2427 PHINode *PN = PHINode::Create(Ty, (Record.size()-1)/2);
2428 InstructionList.push_back(PN);
2430 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
2431 Value *V = getFnValueByID(Record[1+i], Ty);
2432 BasicBlock *BB = getBasicBlock(Record[2+i]);
2433 if (!V || !BB) return Error("Invalid PHI record");
2434 PN->addIncoming(V, BB);
2440 case bitc::FUNC_CODE_INST_LANDINGPAD: {
2441 // LANDINGPAD: [ty, val, val, num, (id0,val0 ...)?]
2443 if (Record.size() < 4)
2444 return Error("Invalid LANDINGPAD record");
2445 Type *Ty = getTypeByID(Record[Idx++]);
2446 if (!Ty) return Error("Invalid LANDINGPAD record");
2448 if (getValueTypePair(Record, Idx, NextValueNo, PersFn))
2449 return Error("Invalid LANDINGPAD record");
2451 bool IsCleanup = !!Record[Idx++];
2452 unsigned NumClauses = Record[Idx++];
2453 LandingPadInst *LP = LandingPadInst::Create(Ty, PersFn, NumClauses);
2454 LP->setCleanup(IsCleanup);
2455 for (unsigned J = 0; J != NumClauses; ++J) {
2456 LandingPadInst::ClauseType CT =
2457 LandingPadInst::ClauseType(Record[Idx++]); (void)CT;
2460 if (getValueTypePair(Record, Idx, NextValueNo, Val)) {
2462 return Error("Invalid LANDINGPAD record");
2465 assert((CT != LandingPadInst::Catch ||
2466 !isa<ArrayType>(Val->getType())) &&
2467 "Catch clause has a invalid type!");
2468 assert((CT != LandingPadInst::Filter ||
2469 isa<ArrayType>(Val->getType())) &&
2470 "Filter clause has invalid type!");
2475 InstructionList.push_back(I);
2479 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
2480 if (Record.size() != 4)
2481 return Error("Invalid ALLOCA record");
2483 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
2484 Type *OpTy = getTypeByID(Record[1]);
2485 Value *Size = getFnValueByID(Record[2], OpTy);
2486 unsigned Align = Record[3];
2487 if (!Ty || !Size) return Error("Invalid ALLOCA record");
2488 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
2489 InstructionList.push_back(I);
2492 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
2495 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2496 OpNum+2 != Record.size())
2497 return Error("Invalid LOAD record");
2499 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2500 InstructionList.push_back(I);
2503 case bitc::FUNC_CODE_INST_LOADATOMIC: {
2504 // LOADATOMIC: [opty, op, align, vol, ordering, synchscope]
2507 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
2508 OpNum+4 != Record.size())
2509 return Error("Invalid LOADATOMIC record");
2512 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2513 if (Ordering == NotAtomic || Ordering == Release ||
2514 Ordering == AcquireRelease)
2515 return Error("Invalid LOADATOMIC record");
2516 if (Ordering != NotAtomic && Record[OpNum] == 0)
2517 return Error("Invalid LOADATOMIC record");
2518 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2520 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2521 Ordering, SynchScope);
2522 InstructionList.push_back(I);
2525 case bitc::FUNC_CODE_INST_STORE: { // STORE2:[ptrty, ptr, val, align, vol]
2528 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2529 getValue(Record, OpNum,
2530 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2531 OpNum+2 != Record.size())
2532 return Error("Invalid STORE record");
2534 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
2535 InstructionList.push_back(I);
2538 case bitc::FUNC_CODE_INST_STOREATOMIC: {
2539 // STOREATOMIC: [ptrty, ptr, val, align, vol, ordering, synchscope]
2542 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2543 getValue(Record, OpNum,
2544 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2545 OpNum+4 != Record.size())
2546 return Error("Invalid STOREATOMIC record");
2548 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2549 if (Ordering == NotAtomic || Ordering == Acquire ||
2550 Ordering == AcquireRelease)
2551 return Error("Invalid STOREATOMIC record");
2552 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2553 if (Ordering != NotAtomic && Record[OpNum] == 0)
2554 return Error("Invalid STOREATOMIC record");
2556 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1,
2557 Ordering, SynchScope);
2558 InstructionList.push_back(I);
2561 case bitc::FUNC_CODE_INST_CMPXCHG: {
2562 // CMPXCHG:[ptrty, ptr, cmp, new, vol, ordering, synchscope]
2564 Value *Ptr, *Cmp, *New;
2565 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2566 getValue(Record, OpNum,
2567 cast<PointerType>(Ptr->getType())->getElementType(), Cmp) ||
2568 getValue(Record, OpNum,
2569 cast<PointerType>(Ptr->getType())->getElementType(), New) ||
2570 OpNum+3 != Record.size())
2571 return Error("Invalid CMPXCHG record");
2572 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+1]);
2573 if (Ordering == NotAtomic || Ordering == Unordered)
2574 return Error("Invalid CMPXCHG record");
2575 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+2]);
2576 I = new AtomicCmpXchgInst(Ptr, Cmp, New, Ordering, SynchScope);
2577 cast<AtomicCmpXchgInst>(I)->setVolatile(Record[OpNum]);
2578 InstructionList.push_back(I);
2581 case bitc::FUNC_CODE_INST_ATOMICRMW: {
2582 // ATOMICRMW:[ptrty, ptr, val, op, vol, ordering, synchscope]
2585 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
2586 getValue(Record, OpNum,
2587 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
2588 OpNum+4 != Record.size())
2589 return Error("Invalid ATOMICRMW record");
2590 AtomicRMWInst::BinOp Operation = GetDecodedRMWOperation(Record[OpNum]);
2591 if (Operation < AtomicRMWInst::FIRST_BINOP ||
2592 Operation > AtomicRMWInst::LAST_BINOP)
2593 return Error("Invalid ATOMICRMW record");
2594 AtomicOrdering Ordering = GetDecodedOrdering(Record[OpNum+2]);
2595 if (Ordering == NotAtomic || Ordering == Unordered)
2596 return Error("Invalid ATOMICRMW record");
2597 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[OpNum+3]);
2598 I = new AtomicRMWInst(Operation, Ptr, Val, Ordering, SynchScope);
2599 cast<AtomicRMWInst>(I)->setVolatile(Record[OpNum+1]);
2600 InstructionList.push_back(I);
2603 case bitc::FUNC_CODE_INST_FENCE: { // FENCE:[ordering, synchscope]
2604 if (2 != Record.size())
2605 return Error("Invalid FENCE record");
2606 AtomicOrdering Ordering = GetDecodedOrdering(Record[0]);
2607 if (Ordering == NotAtomic || Ordering == Unordered ||
2608 Ordering == Monotonic)
2609 return Error("Invalid FENCE record");
2610 SynchronizationScope SynchScope = GetDecodedSynchScope(Record[1]);
2611 I = new FenceInst(Context, Ordering, SynchScope);
2612 InstructionList.push_back(I);
2615 case bitc::FUNC_CODE_INST_CALL: {
2616 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
2617 if (Record.size() < 3)
2618 return Error("Invalid CALL record");
2620 AttrListPtr PAL = getAttributes(Record[0]);
2621 unsigned CCInfo = Record[1];
2625 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
2626 return Error("Invalid CALL record");
2628 PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
2629 FunctionType *FTy = 0;
2630 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
2631 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
2632 return Error("Invalid CALL record");
2634 SmallVector<Value*, 16> Args;
2635 // Read the fixed params.
2636 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
2637 if (FTy->getParamType(i)->isLabelTy())
2638 Args.push_back(getBasicBlock(Record[OpNum]));
2640 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
2641 if (Args.back() == 0) return Error("Invalid CALL record");
2644 // Read type/value pairs for varargs params.
2645 if (!FTy->isVarArg()) {
2646 if (OpNum != Record.size())
2647 return Error("Invalid CALL record");
2649 while (OpNum != Record.size()) {
2651 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
2652 return Error("Invalid CALL record");
2657 I = CallInst::Create(Callee, Args);
2658 InstructionList.push_back(I);
2659 cast<CallInst>(I)->setCallingConv(
2660 static_cast<CallingConv::ID>(CCInfo>>1));
2661 cast<CallInst>(I)->setTailCall(CCInfo & 1);
2662 cast<CallInst>(I)->setAttributes(PAL);
2665 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
2666 if (Record.size() < 3)
2667 return Error("Invalid VAARG record");
2668 Type *OpTy = getTypeByID(Record[0]);
2669 Value *Op = getFnValueByID(Record[1], OpTy);
2670 Type *ResTy = getTypeByID(Record[2]);
2671 if (!OpTy || !Op || !ResTy)
2672 return Error("Invalid VAARG record");
2673 I = new VAArgInst(Op, ResTy);
2674 InstructionList.push_back(I);
2679 // Add instruction to end of current BB. If there is no current BB, reject
2683 return Error("Invalid instruction with no BB");
2685 CurBB->getInstList().push_back(I);
2687 // If this was a terminator instruction, move to the next block.
2688 if (isa<TerminatorInst>(I)) {
2690 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
2693 // Non-void values get registered in the value table for future use.
2694 if (I && !I->getType()->isVoidTy())
2695 ValueList.AssignValue(I, NextValueNo++);
2698 // Check the function list for unresolved values.
2699 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
2700 if (A->getParent() == 0) {
2701 // We found at least one unresolved value. Nuke them all to avoid leaks.
2702 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
2703 if ((A = dyn_cast<Argument>(ValueList[i])) && A->getParent() == 0) {
2704 A->replaceAllUsesWith(UndefValue::get(A->getType()));
2708 return Error("Never resolved value found in function!");
2712 // FIXME: Check for unresolved forward-declared metadata references
2713 // and clean up leaks.
2715 // See if anything took the address of blocks in this function. If so,
2716 // resolve them now.
2717 DenseMap<Function*, std::vector<BlockAddrRefTy> >::iterator BAFRI =
2718 BlockAddrFwdRefs.find(F);
2719 if (BAFRI != BlockAddrFwdRefs.end()) {
2720 std::vector<BlockAddrRefTy> &RefList = BAFRI->second;
2721 for (unsigned i = 0, e = RefList.size(); i != e; ++i) {
2722 unsigned BlockIdx = RefList[i].first;
2723 if (BlockIdx >= FunctionBBs.size())
2724 return Error("Invalid blockaddress block #");
2726 GlobalVariable *FwdRef = RefList[i].second;
2727 FwdRef->replaceAllUsesWith(BlockAddress::get(F, FunctionBBs[BlockIdx]));
2728 FwdRef->eraseFromParent();
2731 BlockAddrFwdRefs.erase(BAFRI);
2734 // Trim the value list down to the size it was before we parsed this function.
2735 ValueList.shrinkTo(ModuleValueListSize);
2736 MDValueList.shrinkTo(ModuleMDValueListSize);
2737 std::vector<BasicBlock*>().swap(FunctionBBs);
2741 /// FindFunctionInStream - Find the function body in the bitcode stream
2742 bool BitcodeReader::FindFunctionInStream(Function *F,
2743 DenseMap<Function*, uint64_t>::iterator DeferredFunctionInfoIterator) {
2744 while (DeferredFunctionInfoIterator->second == 0) {
2745 if (Stream.AtEndOfStream())
2746 return Error("Could not find Function in stream");
2747 // ParseModule will parse the next body in the stream and set its
2748 // position in the DeferredFunctionInfo map.
2749 if (ParseModule(true)) return true;
2754 //===----------------------------------------------------------------------===//
2755 // GVMaterializer implementation
2756 //===----------------------------------------------------------------------===//
2759 bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
2760 if (const Function *F = dyn_cast<Function>(GV)) {
2761 return F->isDeclaration() &&
2762 DeferredFunctionInfo.count(const_cast<Function*>(F));
2767 bool BitcodeReader::Materialize(GlobalValue *GV, std::string *ErrInfo) {
2768 Function *F = dyn_cast<Function>(GV);
2769 // If it's not a function or is already material, ignore the request.
2770 if (!F || !F->isMaterializable()) return false;
2772 DenseMap<Function*, uint64_t>::iterator DFII = DeferredFunctionInfo.find(F);
2773 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
2774 // If its position is recorded as 0, its body is somewhere in the stream
2775 // but we haven't seen it yet.
2776 if (DFII->second == 0)
2777 if (LazyStreamer && FindFunctionInStream(F, DFII)) return true;
2779 // Move the bit stream to the saved position of the deferred function body.
2780 Stream.JumpToBit(DFII->second);
2782 if (ParseFunctionBody(F)) {
2783 if (ErrInfo) *ErrInfo = ErrorString;
2787 // Upgrade any old intrinsic calls in the function.
2788 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
2789 E = UpgradedIntrinsics.end(); I != E; ++I) {
2790 if (I->first != I->second) {
2791 for (Value::use_iterator UI = I->first->use_begin(),
2792 UE = I->first->use_end(); UI != UE; ) {
2793 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2794 UpgradeIntrinsicCall(CI, I->second);
2802 bool BitcodeReader::isDematerializable(const GlobalValue *GV) const {
2803 const Function *F = dyn_cast<Function>(GV);
2804 if (!F || F->isDeclaration())
2806 return DeferredFunctionInfo.count(const_cast<Function*>(F));
2809 void BitcodeReader::Dematerialize(GlobalValue *GV) {
2810 Function *F = dyn_cast<Function>(GV);
2811 // If this function isn't dematerializable, this is a noop.
2812 if (!F || !isDematerializable(F))
2815 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
2817 // Just forget the function body, we can remat it later.
2822 bool BitcodeReader::MaterializeModule(Module *M, std::string *ErrInfo) {
2823 assert(M == TheModule &&
2824 "Can only Materialize the Module this BitcodeReader is attached to.");
2825 // Iterate over the module, deserializing any functions that are still on
2827 for (Module::iterator F = TheModule->begin(), E = TheModule->end();
2829 if (F->isMaterializable() &&
2830 Materialize(F, ErrInfo))
2833 // At this point, if there are any function bodies, the current bit is
2834 // pointing to the END_BLOCK record after them. Now make sure the rest
2835 // of the bits in the module have been read.
2839 // Upgrade any intrinsic calls that slipped through (should not happen!) and
2840 // delete the old functions to clean up. We can't do this unless the entire
2841 // module is materialized because there could always be another function body
2842 // with calls to the old function.
2843 for (std::vector<std::pair<Function*, Function*> >::iterator I =
2844 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
2845 if (I->first != I->second) {
2846 for (Value::use_iterator UI = I->first->use_begin(),
2847 UE = I->first->use_end(); UI != UE; ) {
2848 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
2849 UpgradeIntrinsicCall(CI, I->second);
2851 if (!I->first->use_empty())
2852 I->first->replaceAllUsesWith(I->second);
2853 I->first->eraseFromParent();
2856 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
2861 bool BitcodeReader::InitStream() {
2862 if (LazyStreamer) return InitLazyStream();
2863 return InitStreamFromBuffer();
2866 bool BitcodeReader::InitStreamFromBuffer() {
2867 const unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
2868 const unsigned char *BufEnd = BufPtr+Buffer->getBufferSize();
2870 if (Buffer->getBufferSize() & 3) {
2871 if (!isRawBitcode(BufPtr, BufEnd) && !isBitcodeWrapper(BufPtr, BufEnd))
2872 return Error("Invalid bitcode signature");
2874 return Error("Bitcode stream should be a multiple of 4 bytes in length");
2877 // If we have a wrapper header, parse it and ignore the non-bc file contents.
2878 // The magic number is 0x0B17C0DE stored in little endian.
2879 if (isBitcodeWrapper(BufPtr, BufEnd))
2880 if (SkipBitcodeWrapperHeader(BufPtr, BufEnd, true))
2881 return Error("Invalid bitcode wrapper header");
2883 StreamFile.reset(new BitstreamReader(BufPtr, BufEnd));
2884 Stream.init(*StreamFile);
2889 bool BitcodeReader::InitLazyStream() {
2890 // Check and strip off the bitcode wrapper; BitstreamReader expects never to
2892 StreamingMemoryObject *Bytes = new StreamingMemoryObject(LazyStreamer);
2893 StreamFile.reset(new BitstreamReader(Bytes));
2894 Stream.init(*StreamFile);
2896 unsigned char buf[16];
2897 if (Bytes->readBytes(0, 16, buf, NULL) == -1)
2898 return Error("Bitcode stream must be at least 16 bytes in length");
2900 if (!isBitcode(buf, buf + 16))
2901 return Error("Invalid bitcode signature");
2903 if (isBitcodeWrapper(buf, buf + 4)) {
2904 const unsigned char *bitcodeStart = buf;
2905 const unsigned char *bitcodeEnd = buf + 16;
2906 SkipBitcodeWrapperHeader(bitcodeStart, bitcodeEnd, false);
2907 Bytes->dropLeadingBytes(bitcodeStart - buf);
2908 Bytes->setKnownObjectSize(bitcodeEnd - bitcodeStart);
2913 //===----------------------------------------------------------------------===//
2914 // External interface
2915 //===----------------------------------------------------------------------===//
2917 /// getLazyBitcodeModule - lazy function-at-a-time loading from a file.
2919 Module *llvm::getLazyBitcodeModule(MemoryBuffer *Buffer,
2920 LLVMContext& Context,
2921 std::string *ErrMsg) {
2922 Module *M = new Module(Buffer->getBufferIdentifier(), Context);
2923 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2924 M->setMaterializer(R);
2925 if (R->ParseBitcodeInto(M)) {
2927 *ErrMsg = R->getErrorString();
2929 delete M; // Also deletes R.
2932 // Have the BitcodeReader dtor delete 'Buffer'.
2933 R->setBufferOwned(true);
2935 R->materializeForwardReferencedFunctions();
2941 Module *llvm::getStreamedBitcodeModule(const std::string &name,
2942 DataStreamer *streamer,
2943 LLVMContext &Context,
2944 std::string *ErrMsg) {
2945 Module *M = new Module(name, Context);
2946 BitcodeReader *R = new BitcodeReader(streamer, Context);
2947 M->setMaterializer(R);
2948 if (R->ParseBitcodeInto(M)) {
2950 *ErrMsg = R->getErrorString();
2951 delete M; // Also deletes R.
2954 R->setBufferOwned(false); // no buffer to delete
2958 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
2959 /// If an error occurs, return null and fill in *ErrMsg if non-null.
2960 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext& Context,
2961 std::string *ErrMsg){
2962 Module *M = getLazyBitcodeModule(Buffer, Context, ErrMsg);
2965 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
2966 // there was an error.
2967 static_cast<BitcodeReader*>(M->getMaterializer())->setBufferOwned(false);
2969 // Read in the entire module, and destroy the BitcodeReader.
2970 if (M->MaterializeAllPermanently(ErrMsg)) {
2975 // TODO: Restore the use-lists to the in-memory state when the bitcode was
2976 // written. We must defer until the Module has been fully materialized.
2981 std::string llvm::getBitcodeTargetTriple(MemoryBuffer *Buffer,
2982 LLVMContext& Context,
2983 std::string *ErrMsg) {
2984 BitcodeReader *R = new BitcodeReader(Buffer, Context);
2985 // Don't let the BitcodeReader dtor delete 'Buffer'.
2986 R->setBufferOwned(false);
2988 std::string Triple("");
2989 if (R->ParseTriple(Triple))
2991 *ErrMsg = R->getErrorString();