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/Instructions.h"
20 #include "llvm/Module.h"
21 #include "llvm/AutoUpgrade.h"
22 #include "llvm/ADT/SmallString.h"
23 #include "llvm/ADT/SmallVector.h"
24 #include "llvm/Support/MathExtras.h"
25 #include "llvm/Support/MemoryBuffer.h"
28 void BitcodeReader::FreeState() {
31 std::vector<PATypeHolder>().swap(TypeList);
34 std::vector<PAListPtr>().swap(ParamAttrs);
35 std::vector<BasicBlock*>().swap(FunctionBBs);
36 std::vector<Function*>().swap(FunctionsWithBodies);
37 DeferredFunctionInfo.clear();
40 //===----------------------------------------------------------------------===//
41 // Helper functions to implement forward reference resolution, etc.
42 //===----------------------------------------------------------------------===//
44 /// ConvertToString - Convert a string from a record into an std::string, return
46 template<typename StrTy>
47 static bool ConvertToString(SmallVector<uint64_t, 64> &Record, unsigned Idx,
49 if (Idx > Record.size())
52 for (unsigned i = Idx, e = Record.size(); i != e; ++i)
53 Result += (char)Record[i];
57 static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
59 default: // Map unknown/new linkages to external
60 case 0: return GlobalValue::ExternalLinkage;
61 case 1: return GlobalValue::WeakLinkage;
62 case 2: return GlobalValue::AppendingLinkage;
63 case 3: return GlobalValue::InternalLinkage;
64 case 4: return GlobalValue::LinkOnceLinkage;
65 case 5: return GlobalValue::DLLImportLinkage;
66 case 6: return GlobalValue::DLLExportLinkage;
67 case 7: return GlobalValue::ExternalWeakLinkage;
71 static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
73 default: // Map unknown visibilities to default.
74 case 0: return GlobalValue::DefaultVisibility;
75 case 1: return GlobalValue::HiddenVisibility;
76 case 2: return GlobalValue::ProtectedVisibility;
80 static int GetDecodedCastOpcode(unsigned Val) {
83 case bitc::CAST_TRUNC : return Instruction::Trunc;
84 case bitc::CAST_ZEXT : return Instruction::ZExt;
85 case bitc::CAST_SEXT : return Instruction::SExt;
86 case bitc::CAST_FPTOUI : return Instruction::FPToUI;
87 case bitc::CAST_FPTOSI : return Instruction::FPToSI;
88 case bitc::CAST_UITOFP : return Instruction::UIToFP;
89 case bitc::CAST_SITOFP : return Instruction::SIToFP;
90 case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
91 case bitc::CAST_FPEXT : return Instruction::FPExt;
92 case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
93 case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
94 case bitc::CAST_BITCAST : return Instruction::BitCast;
97 static int GetDecodedBinaryOpcode(unsigned Val, const Type *Ty) {
100 case bitc::BINOP_ADD: return Instruction::Add;
101 case bitc::BINOP_SUB: return Instruction::Sub;
102 case bitc::BINOP_MUL: return Instruction::Mul;
103 case bitc::BINOP_UDIV: return Instruction::UDiv;
104 case bitc::BINOP_SDIV:
105 return Ty->isFPOrFPVector() ? Instruction::FDiv : Instruction::SDiv;
106 case bitc::BINOP_UREM: return Instruction::URem;
107 case bitc::BINOP_SREM:
108 return Ty->isFPOrFPVector() ? Instruction::FRem : Instruction::SRem;
109 case bitc::BINOP_SHL: return Instruction::Shl;
110 case bitc::BINOP_LSHR: return Instruction::LShr;
111 case bitc::BINOP_ASHR: return Instruction::AShr;
112 case bitc::BINOP_AND: return Instruction::And;
113 case bitc::BINOP_OR: return Instruction::Or;
114 case bitc::BINOP_XOR: return Instruction::Xor;
120 /// @brief A class for maintaining the slot number definition
121 /// as a placeholder for the actual definition for forward constants defs.
122 class ConstantPlaceHolder : public ConstantExpr {
123 ConstantPlaceHolder(); // DO NOT IMPLEMENT
124 void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
127 explicit ConstantPlaceHolder(const Type *Ty)
128 : ConstantExpr(Ty, Instruction::UserOp1, &Op, 1),
129 Op(UndefValue::get(Type::Int32Ty), this) {
134 Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
137 // Insert a bunch of null values.
139 OperandList = &Uses[0];
143 if (Value *V = Uses[Idx]) {
144 assert(Ty == V->getType() && "Type mismatch in constant table!");
145 return cast<Constant>(V);
148 // Create and return a placeholder, which will later be RAUW'd.
149 Constant *C = new ConstantPlaceHolder(Ty);
150 Uses[Idx].init(C, this);
154 Value *BitcodeReaderValueList::getValueFwdRef(unsigned Idx, const Type *Ty) {
156 // Insert a bunch of null values.
158 OperandList = &Uses[0];
162 if (Value *V = Uses[Idx]) {
163 assert((Ty == 0 || Ty == V->getType()) && "Type mismatch in value table!");
167 // No type specified, must be invalid reference.
168 if (Ty == 0) return 0;
170 // Create and return a placeholder, which will later be RAUW'd.
171 Value *V = new Argument(Ty);
172 Uses[Idx].init(V, this);
177 const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
178 // If the TypeID is in range, return it.
179 if (ID < TypeList.size())
180 return TypeList[ID].get();
181 if (!isTypeTable) return 0;
183 // The type table allows forward references. Push as many Opaque types as
184 // needed to get up to ID.
185 while (TypeList.size() <= ID)
186 TypeList.push_back(OpaqueType::get());
187 return TypeList.back().get();
190 //===----------------------------------------------------------------------===//
191 // Functions for parsing blocks from the bitcode file
192 //===----------------------------------------------------------------------===//
194 bool BitcodeReader::ParseParamAttrBlock() {
195 if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID))
196 return Error("Malformed block record");
198 if (!ParamAttrs.empty())
199 return Error("Multiple PARAMATTR blocks found!");
201 SmallVector<uint64_t, 64> Record;
203 SmallVector<ParamAttrsWithIndex, 8> Attrs;
205 // Read all the records.
207 unsigned Code = Stream.ReadCode();
208 if (Code == bitc::END_BLOCK) {
209 if (Stream.ReadBlockEnd())
210 return Error("Error at end of PARAMATTR block");
214 if (Code == bitc::ENTER_SUBBLOCK) {
215 // No known subblocks, always skip them.
216 Stream.ReadSubBlockID();
217 if (Stream.SkipBlock())
218 return Error("Malformed block record");
222 if (Code == bitc::DEFINE_ABBREV) {
223 Stream.ReadAbbrevRecord();
229 switch (Stream.ReadRecord(Code, Record)) {
230 default: // Default behavior: ignore.
232 case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...]
233 if (Record.size() & 1)
234 return Error("Invalid ENTRY record");
236 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
237 if (Record[i+1] != ParamAttr::None)
238 Attrs.push_back(ParamAttrsWithIndex::get(Record[i], Record[i+1]));
241 ParamAttrs.push_back(PAListPtr::get(Attrs.begin(), Attrs.end()));
250 bool BitcodeReader::ParseTypeTable() {
251 if (Stream.EnterSubBlock(bitc::TYPE_BLOCK_ID))
252 return Error("Malformed block record");
254 if (!TypeList.empty())
255 return Error("Multiple TYPE_BLOCKs found!");
257 SmallVector<uint64_t, 64> Record;
258 unsigned NumRecords = 0;
260 // Read all the records for this type table.
262 unsigned Code = Stream.ReadCode();
263 if (Code == bitc::END_BLOCK) {
264 if (NumRecords != TypeList.size())
265 return Error("Invalid type forward reference in TYPE_BLOCK");
266 if (Stream.ReadBlockEnd())
267 return Error("Error at end of type table block");
271 if (Code == bitc::ENTER_SUBBLOCK) {
272 // No known subblocks, always skip them.
273 Stream.ReadSubBlockID();
274 if (Stream.SkipBlock())
275 return Error("Malformed block record");
279 if (Code == bitc::DEFINE_ABBREV) {
280 Stream.ReadAbbrevRecord();
286 const Type *ResultTy = 0;
287 switch (Stream.ReadRecord(Code, Record)) {
288 default: // Default behavior: unknown type.
291 case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
292 // TYPE_CODE_NUMENTRY contains a count of the number of types in the
293 // type list. This allows us to reserve space.
294 if (Record.size() < 1)
295 return Error("Invalid TYPE_CODE_NUMENTRY record");
296 TypeList.reserve(Record[0]);
298 case bitc::TYPE_CODE_VOID: // VOID
299 ResultTy = Type::VoidTy;
301 case bitc::TYPE_CODE_FLOAT: // FLOAT
302 ResultTy = Type::FloatTy;
304 case bitc::TYPE_CODE_DOUBLE: // DOUBLE
305 ResultTy = Type::DoubleTy;
307 case bitc::TYPE_CODE_X86_FP80: // X86_FP80
308 ResultTy = Type::X86_FP80Ty;
310 case bitc::TYPE_CODE_FP128: // FP128
311 ResultTy = Type::FP128Ty;
313 case bitc::TYPE_CODE_PPC_FP128: // PPC_FP128
314 ResultTy = Type::PPC_FP128Ty;
316 case bitc::TYPE_CODE_LABEL: // LABEL
317 ResultTy = Type::LabelTy;
319 case bitc::TYPE_CODE_OPAQUE: // OPAQUE
322 case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
323 if (Record.size() < 1)
324 return Error("Invalid Integer type record");
326 ResultTy = IntegerType::get(Record[0]);
328 case bitc::TYPE_CODE_POINTER: { // POINTER: [pointee type] or
329 // [pointee type, address space]
330 if (Record.size() < 1)
331 return Error("Invalid POINTER type record");
332 unsigned AddressSpace = 0;
333 if (Record.size() == 2)
334 AddressSpace = Record[1];
335 ResultTy = PointerType::get(getTypeByID(Record[0], true), AddressSpace);
338 case bitc::TYPE_CODE_FUNCTION: {
339 // FIXME: attrid is dead, remove it in LLVM 3.0
340 // FUNCTION: [vararg, attrid, retty, paramty x N]
341 if (Record.size() < 3)
342 return Error("Invalid FUNCTION type record");
343 std::vector<const Type*> ArgTys;
344 for (unsigned i = 3, e = Record.size(); i != e; ++i)
345 ArgTys.push_back(getTypeByID(Record[i], true));
347 ResultTy = FunctionType::get(getTypeByID(Record[2], true), ArgTys,
351 case bitc::TYPE_CODE_STRUCT: { // STRUCT: [ispacked, eltty x N]
352 if (Record.size() < 1)
353 return Error("Invalid STRUCT type record");
354 std::vector<const Type*> EltTys;
355 for (unsigned i = 1, e = Record.size(); i != e; ++i)
356 EltTys.push_back(getTypeByID(Record[i], true));
357 ResultTy = StructType::get(EltTys, Record[0]);
360 case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
361 if (Record.size() < 2)
362 return Error("Invalid ARRAY type record");
363 ResultTy = ArrayType::get(getTypeByID(Record[1], true), Record[0]);
365 case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
366 if (Record.size() < 2)
367 return Error("Invalid VECTOR type record");
368 ResultTy = VectorType::get(getTypeByID(Record[1], true), Record[0]);
372 if (NumRecords == TypeList.size()) {
373 // If this is a new type slot, just append it.
374 TypeList.push_back(ResultTy ? ResultTy : OpaqueType::get());
376 } else if (ResultTy == 0) {
377 // Otherwise, this was forward referenced, so an opaque type was created,
378 // but the result type is actually just an opaque. Leave the one we
379 // created previously.
382 // Otherwise, this was forward referenced, so an opaque type was created.
383 // Resolve the opaque type to the real type now.
384 assert(NumRecords < TypeList.size() && "Typelist imbalance");
385 const OpaqueType *OldTy = cast<OpaqueType>(TypeList[NumRecords++].get());
387 // Don't directly push the new type on the Tab. Instead we want to replace
388 // the opaque type we previously inserted with the new concrete value. The
389 // refinement from the abstract (opaque) type to the new type causes all
390 // uses of the abstract type to use the concrete type (NewTy). This will
391 // also cause the opaque type to be deleted.
392 const_cast<OpaqueType*>(OldTy)->refineAbstractTypeTo(ResultTy);
394 // This should have replaced the old opaque type with the new type in the
395 // value table... or with a preexisting type that was already in the
396 // system. Let's just make sure it did.
397 assert(TypeList[NumRecords-1].get() != OldTy &&
398 "refineAbstractType didn't work!");
404 bool BitcodeReader::ParseTypeSymbolTable() {
405 if (Stream.EnterSubBlock(bitc::TYPE_SYMTAB_BLOCK_ID))
406 return Error("Malformed block record");
408 SmallVector<uint64_t, 64> Record;
410 // Read all the records for this type table.
411 std::string TypeName;
413 unsigned Code = Stream.ReadCode();
414 if (Code == bitc::END_BLOCK) {
415 if (Stream.ReadBlockEnd())
416 return Error("Error at end of type symbol table block");
420 if (Code == bitc::ENTER_SUBBLOCK) {
421 // No known subblocks, always skip them.
422 Stream.ReadSubBlockID();
423 if (Stream.SkipBlock())
424 return Error("Malformed block record");
428 if (Code == bitc::DEFINE_ABBREV) {
429 Stream.ReadAbbrevRecord();
435 switch (Stream.ReadRecord(Code, Record)) {
436 default: // Default behavior: unknown type.
438 case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namechar x N]
439 if (ConvertToString(Record, 1, TypeName))
440 return Error("Invalid TST_ENTRY record");
441 unsigned TypeID = Record[0];
442 if (TypeID >= TypeList.size())
443 return Error("Invalid Type ID in TST_ENTRY record");
445 TheModule->addTypeName(TypeName, TypeList[TypeID].get());
452 bool BitcodeReader::ParseValueSymbolTable() {
453 if (Stream.EnterSubBlock(bitc::VALUE_SYMTAB_BLOCK_ID))
454 return Error("Malformed block record");
456 SmallVector<uint64_t, 64> Record;
458 // Read all the records for this value table.
459 SmallString<128> ValueName;
461 unsigned Code = Stream.ReadCode();
462 if (Code == bitc::END_BLOCK) {
463 if (Stream.ReadBlockEnd())
464 return Error("Error at end of value symbol table block");
467 if (Code == bitc::ENTER_SUBBLOCK) {
468 // No known subblocks, always skip them.
469 Stream.ReadSubBlockID();
470 if (Stream.SkipBlock())
471 return Error("Malformed block record");
475 if (Code == bitc::DEFINE_ABBREV) {
476 Stream.ReadAbbrevRecord();
482 switch (Stream.ReadRecord(Code, Record)) {
483 default: // Default behavior: unknown type.
485 case bitc::VST_CODE_ENTRY: { // VST_ENTRY: [valueid, namechar x N]
486 if (ConvertToString(Record, 1, ValueName))
487 return Error("Invalid TST_ENTRY record");
488 unsigned ValueID = Record[0];
489 if (ValueID >= ValueList.size())
490 return Error("Invalid Value ID in VST_ENTRY record");
491 Value *V = ValueList[ValueID];
493 V->setName(&ValueName[0], ValueName.size());
497 case bitc::VST_CODE_BBENTRY: {
498 if (ConvertToString(Record, 1, ValueName))
499 return Error("Invalid VST_BBENTRY record");
500 BasicBlock *BB = getBasicBlock(Record[0]);
502 return Error("Invalid BB ID in VST_BBENTRY record");
504 BB->setName(&ValueName[0], ValueName.size());
512 /// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
513 /// the LSB for dense VBR encoding.
514 static uint64_t DecodeSignRotatedValue(uint64_t V) {
519 // There is no such thing as -0 with integers. "-0" really means MININT.
523 /// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
524 /// values and aliases that we can.
525 bool BitcodeReader::ResolveGlobalAndAliasInits() {
526 std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
527 std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
529 GlobalInitWorklist.swap(GlobalInits);
530 AliasInitWorklist.swap(AliasInits);
532 while (!GlobalInitWorklist.empty()) {
533 unsigned ValID = GlobalInitWorklist.back().second;
534 if (ValID >= ValueList.size()) {
535 // Not ready to resolve this yet, it requires something later in the file.
536 GlobalInits.push_back(GlobalInitWorklist.back());
538 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
539 GlobalInitWorklist.back().first->setInitializer(C);
541 return Error("Global variable initializer is not a constant!");
543 GlobalInitWorklist.pop_back();
546 while (!AliasInitWorklist.empty()) {
547 unsigned ValID = AliasInitWorklist.back().second;
548 if (ValID >= ValueList.size()) {
549 AliasInits.push_back(AliasInitWorklist.back());
551 if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
552 AliasInitWorklist.back().first->setAliasee(C);
554 return Error("Alias initializer is not a constant!");
556 AliasInitWorklist.pop_back();
562 bool BitcodeReader::ParseConstants() {
563 if (Stream.EnterSubBlock(bitc::CONSTANTS_BLOCK_ID))
564 return Error("Malformed block record");
566 SmallVector<uint64_t, 64> Record;
568 // Read all the records for this value table.
569 const Type *CurTy = Type::Int32Ty;
570 unsigned NextCstNo = ValueList.size();
572 unsigned Code = Stream.ReadCode();
573 if (Code == bitc::END_BLOCK) {
574 if (NextCstNo != ValueList.size())
575 return Error("Invalid constant reference!");
577 if (Stream.ReadBlockEnd())
578 return Error("Error at end of constants block");
582 if (Code == bitc::ENTER_SUBBLOCK) {
583 // No known subblocks, always skip them.
584 Stream.ReadSubBlockID();
585 if (Stream.SkipBlock())
586 return Error("Malformed block record");
590 if (Code == bitc::DEFINE_ABBREV) {
591 Stream.ReadAbbrevRecord();
598 switch (Stream.ReadRecord(Code, Record)) {
599 default: // Default behavior: unknown constant
600 case bitc::CST_CODE_UNDEF: // UNDEF
601 V = UndefValue::get(CurTy);
603 case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
605 return Error("Malformed CST_SETTYPE record");
606 if (Record[0] >= TypeList.size())
607 return Error("Invalid Type ID in CST_SETTYPE record");
608 CurTy = TypeList[Record[0]];
609 continue; // Skip the ValueList manipulation.
610 case bitc::CST_CODE_NULL: // NULL
611 V = Constant::getNullValue(CurTy);
613 case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
614 if (!isa<IntegerType>(CurTy) || Record.empty())
615 return Error("Invalid CST_INTEGER record");
616 V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
618 case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n x intval]
619 if (!isa<IntegerType>(CurTy) || Record.empty())
620 return Error("Invalid WIDE_INTEGER record");
622 unsigned NumWords = Record.size();
623 SmallVector<uint64_t, 8> Words;
624 Words.resize(NumWords);
625 for (unsigned i = 0; i != NumWords; ++i)
626 Words[i] = DecodeSignRotatedValue(Record[i]);
627 V = ConstantInt::get(APInt(cast<IntegerType>(CurTy)->getBitWidth(),
628 NumWords, &Words[0]));
631 case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval]
633 return Error("Invalid FLOAT record");
634 if (CurTy == Type::FloatTy)
635 V = ConstantFP::get(CurTy, APFloat(APInt(32, (uint32_t)Record[0])));
636 else if (CurTy == Type::DoubleTy)
637 V = ConstantFP::get(CurTy, APFloat(APInt(64, Record[0])));
638 else if (CurTy == Type::X86_FP80Ty)
639 V = ConstantFP::get(CurTy, APFloat(APInt(80, 2, &Record[0])));
640 else if (CurTy == Type::FP128Ty)
641 V = ConstantFP::get(CurTy, APFloat(APInt(128, 2, &Record[0]), true));
642 else if (CurTy == Type::PPC_FP128Ty)
643 V = ConstantFP::get(CurTy, APFloat(APInt(128, 2, &Record[0])));
645 V = UndefValue::get(CurTy);
649 case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n x value number]
651 return Error("Invalid CST_AGGREGATE record");
653 unsigned Size = Record.size();
654 std::vector<Constant*> Elts;
656 if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
657 for (unsigned i = 0; i != Size; ++i)
658 Elts.push_back(ValueList.getConstantFwdRef(Record[i],
659 STy->getElementType(i)));
660 V = ConstantStruct::get(STy, Elts);
661 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
662 const Type *EltTy = ATy->getElementType();
663 for (unsigned i = 0; i != Size; ++i)
664 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
665 V = ConstantArray::get(ATy, Elts);
666 } else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
667 const Type *EltTy = VTy->getElementType();
668 for (unsigned i = 0; i != Size; ++i)
669 Elts.push_back(ValueList.getConstantFwdRef(Record[i], EltTy));
670 V = ConstantVector::get(Elts);
672 V = UndefValue::get(CurTy);
676 case bitc::CST_CODE_STRING: { // STRING: [values]
678 return Error("Invalid CST_AGGREGATE record");
680 const ArrayType *ATy = cast<ArrayType>(CurTy);
681 const Type *EltTy = ATy->getElementType();
683 unsigned Size = Record.size();
684 std::vector<Constant*> Elts;
685 for (unsigned i = 0; i != Size; ++i)
686 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
687 V = ConstantArray::get(ATy, Elts);
690 case bitc::CST_CODE_CSTRING: { // CSTRING: [values]
692 return Error("Invalid CST_AGGREGATE record");
694 const ArrayType *ATy = cast<ArrayType>(CurTy);
695 const Type *EltTy = ATy->getElementType();
697 unsigned Size = Record.size();
698 std::vector<Constant*> Elts;
699 for (unsigned i = 0; i != Size; ++i)
700 Elts.push_back(ConstantInt::get(EltTy, Record[i]));
701 Elts.push_back(Constant::getNullValue(EltTy));
702 V = ConstantArray::get(ATy, Elts);
705 case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
706 if (Record.size() < 3) return Error("Invalid CE_BINOP record");
707 int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
709 V = UndefValue::get(CurTy); // Unknown binop.
711 Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
712 Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
713 V = ConstantExpr::get(Opc, LHS, RHS);
717 case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
718 if (Record.size() < 3) return Error("Invalid CE_CAST record");
719 int Opc = GetDecodedCastOpcode(Record[0]);
721 V = UndefValue::get(CurTy); // Unknown cast.
723 const Type *OpTy = getTypeByID(Record[1]);
724 if (!OpTy) return Error("Invalid CE_CAST record");
725 Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
726 V = ConstantExpr::getCast(Opc, Op, CurTy);
730 case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
731 if (Record.size() & 1) return Error("Invalid CE_GEP record");
732 SmallVector<Constant*, 16> Elts;
733 for (unsigned i = 0, e = Record.size(); i != e; i += 2) {
734 const Type *ElTy = getTypeByID(Record[i]);
735 if (!ElTy) return Error("Invalid CE_GEP record");
736 Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
738 V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1], Elts.size()-1);
741 case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
742 if (Record.size() < 3) return Error("Invalid CE_SELECT record");
743 V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
745 ValueList.getConstantFwdRef(Record[1],CurTy),
746 ValueList.getConstantFwdRef(Record[2],CurTy));
748 case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
749 if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
750 const VectorType *OpTy =
751 dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
752 if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
753 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
754 Constant *Op1 = ValueList.getConstantFwdRef(Record[2],
755 OpTy->getElementType());
756 V = ConstantExpr::getExtractElement(Op0, Op1);
759 case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
760 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
761 if (Record.size() < 3 || OpTy == 0)
762 return Error("Invalid CE_INSERTELT record");
763 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
764 Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
765 OpTy->getElementType());
766 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::Int32Ty);
767 V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
770 case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
771 const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
772 if (Record.size() < 3 || OpTy == 0)
773 return Error("Invalid CE_INSERTELT record");
774 Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
775 Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
776 const Type *ShufTy=VectorType::get(Type::Int32Ty, OpTy->getNumElements());
777 Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
778 V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
781 case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
782 if (Record.size() < 4) return Error("Invalid CE_CMP record");
783 const Type *OpTy = getTypeByID(Record[0]);
784 if (OpTy == 0) return Error("Invalid CE_CMP record");
785 Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
786 Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
788 if (OpTy->isFloatingPoint())
789 V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
791 V = ConstantExpr::getICmp(Record[3], Op0, Op1);
794 case bitc::CST_CODE_INLINEASM: {
795 if (Record.size() < 2) return Error("Invalid INLINEASM record");
796 std::string AsmStr, ConstrStr;
797 bool HasSideEffects = Record[0];
798 unsigned AsmStrSize = Record[1];
799 if (2+AsmStrSize >= Record.size())
800 return Error("Invalid INLINEASM record");
801 unsigned ConstStrSize = Record[2+AsmStrSize];
802 if (3+AsmStrSize+ConstStrSize > Record.size())
803 return Error("Invalid INLINEASM record");
805 for (unsigned i = 0; i != AsmStrSize; ++i)
806 AsmStr += (char)Record[2+i];
807 for (unsigned i = 0; i != ConstStrSize; ++i)
808 ConstrStr += (char)Record[3+AsmStrSize+i];
809 const PointerType *PTy = cast<PointerType>(CurTy);
810 V = InlineAsm::get(cast<FunctionType>(PTy->getElementType()),
811 AsmStr, ConstrStr, HasSideEffects);
816 ValueList.AssignValue(V, NextCstNo);
821 /// RememberAndSkipFunctionBody - When we see the block for a function body,
822 /// remember where it is and then skip it. This lets us lazily deserialize the
824 bool BitcodeReader::RememberAndSkipFunctionBody() {
825 // Get the function we are talking about.
826 if (FunctionsWithBodies.empty())
827 return Error("Insufficient function protos");
829 Function *Fn = FunctionsWithBodies.back();
830 FunctionsWithBodies.pop_back();
832 // Save the current stream state.
833 uint64_t CurBit = Stream.GetCurrentBitNo();
834 DeferredFunctionInfo[Fn] = std::make_pair(CurBit, Fn->getLinkage());
836 // Set the functions linkage to GhostLinkage so we know it is lazily
838 Fn->setLinkage(GlobalValue::GhostLinkage);
840 // Skip over the function block for now.
841 if (Stream.SkipBlock())
842 return Error("Malformed block record");
846 bool BitcodeReader::ParseModule(const std::string &ModuleID) {
847 // Reject multiple MODULE_BLOCK's in a single bitstream.
849 return Error("Multiple MODULE_BLOCKs in same stream");
851 if (Stream.EnterSubBlock(bitc::MODULE_BLOCK_ID))
852 return Error("Malformed block record");
854 // Otherwise, create the module.
855 TheModule = new Module(ModuleID);
857 SmallVector<uint64_t, 64> Record;
858 std::vector<std::string> SectionTable;
859 std::vector<std::string> CollectorTable;
861 // Read all the records for this module.
862 while (!Stream.AtEndOfStream()) {
863 unsigned Code = Stream.ReadCode();
864 if (Code == bitc::END_BLOCK) {
865 if (Stream.ReadBlockEnd())
866 return Error("Error at end of module block");
868 // Patch the initializers for globals and aliases up.
869 ResolveGlobalAndAliasInits();
870 if (!GlobalInits.empty() || !AliasInits.empty())
871 return Error("Malformed global initializer set");
872 if (!FunctionsWithBodies.empty())
873 return Error("Too few function bodies found");
875 // Look for intrinsic functions which need to be upgraded at some point
876 for (Module::iterator FI = TheModule->begin(), FE = TheModule->end();
879 if (UpgradeIntrinsicFunction(FI, NewFn))
880 UpgradedIntrinsics.push_back(std::make_pair(FI, NewFn));
883 // Force deallocation of memory for these vectors to favor the client that
884 // want lazy deserialization.
885 std::vector<std::pair<GlobalVariable*, unsigned> >().swap(GlobalInits);
886 std::vector<std::pair<GlobalAlias*, unsigned> >().swap(AliasInits);
887 std::vector<Function*>().swap(FunctionsWithBodies);
891 if (Code == bitc::ENTER_SUBBLOCK) {
892 switch (Stream.ReadSubBlockID()) {
893 default: // Skip unknown content.
894 if (Stream.SkipBlock())
895 return Error("Malformed block record");
897 case bitc::BLOCKINFO_BLOCK_ID:
898 if (Stream.ReadBlockInfoBlock())
899 return Error("Malformed BlockInfoBlock");
901 case bitc::PARAMATTR_BLOCK_ID:
902 if (ParseParamAttrBlock())
905 case bitc::TYPE_BLOCK_ID:
906 if (ParseTypeTable())
909 case bitc::TYPE_SYMTAB_BLOCK_ID:
910 if (ParseTypeSymbolTable())
913 case bitc::VALUE_SYMTAB_BLOCK_ID:
914 if (ParseValueSymbolTable())
917 case bitc::CONSTANTS_BLOCK_ID:
918 if (ParseConstants() || ResolveGlobalAndAliasInits())
921 case bitc::FUNCTION_BLOCK_ID:
922 // If this is the first function body we've seen, reverse the
923 // FunctionsWithBodies list.
924 if (!HasReversedFunctionsWithBodies) {
925 std::reverse(FunctionsWithBodies.begin(), FunctionsWithBodies.end());
926 HasReversedFunctionsWithBodies = true;
929 if (RememberAndSkipFunctionBody())
936 if (Code == bitc::DEFINE_ABBREV) {
937 Stream.ReadAbbrevRecord();
942 switch (Stream.ReadRecord(Code, Record)) {
943 default: break; // Default behavior, ignore unknown content.
944 case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
945 if (Record.size() < 1)
946 return Error("Malformed MODULE_CODE_VERSION");
947 // Only version #0 is supported so far.
949 return Error("Unknown bitstream version!");
951 case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strchr x N]
953 if (ConvertToString(Record, 0, S))
954 return Error("Invalid MODULE_CODE_TRIPLE record");
955 TheModule->setTargetTriple(S);
958 case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strchr x N]
960 if (ConvertToString(Record, 0, S))
961 return Error("Invalid MODULE_CODE_DATALAYOUT record");
962 TheModule->setDataLayout(S);
965 case bitc::MODULE_CODE_ASM: { // ASM: [strchr x N]
967 if (ConvertToString(Record, 0, S))
968 return Error("Invalid MODULE_CODE_ASM record");
969 TheModule->setModuleInlineAsm(S);
972 case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strchr x N]
974 if (ConvertToString(Record, 0, S))
975 return Error("Invalid MODULE_CODE_DEPLIB record");
976 TheModule->addLibrary(S);
979 case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strchr x N]
981 if (ConvertToString(Record, 0, S))
982 return Error("Invalid MODULE_CODE_SECTIONNAME record");
983 SectionTable.push_back(S);
986 case bitc::MODULE_CODE_COLLECTORNAME: { // SECTIONNAME: [strchr x N]
988 if (ConvertToString(Record, 0, S))
989 return Error("Invalid MODULE_CODE_COLLECTORNAME record");
990 CollectorTable.push_back(S);
993 // GLOBALVAR: [pointer type, isconst, initid,
994 // linkage, alignment, section, visibility, threadlocal]
995 case bitc::MODULE_CODE_GLOBALVAR: {
996 if (Record.size() < 6)
997 return Error("Invalid MODULE_CODE_GLOBALVAR record");
998 const Type *Ty = getTypeByID(Record[0]);
999 if (!isa<PointerType>(Ty))
1000 return Error("Global not a pointer type!");
1001 unsigned AddressSpace = cast<PointerType>(Ty)->getAddressSpace();
1002 Ty = cast<PointerType>(Ty)->getElementType();
1004 bool isConstant = Record[1];
1005 GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
1006 unsigned Alignment = (1 << Record[4]) >> 1;
1007 std::string Section;
1009 if (Record[5]-1 >= SectionTable.size())
1010 return Error("Invalid section ID");
1011 Section = SectionTable[Record[5]-1];
1013 GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
1014 if (Record.size() > 6)
1015 Visibility = GetDecodedVisibility(Record[6]);
1016 bool isThreadLocal = false;
1017 if (Record.size() > 7)
1018 isThreadLocal = Record[7];
1020 GlobalVariable *NewGV =
1021 new GlobalVariable(Ty, isConstant, Linkage, 0, "", TheModule,
1022 isThreadLocal, AddressSpace);
1023 NewGV->setAlignment(Alignment);
1024 if (!Section.empty())
1025 NewGV->setSection(Section);
1026 NewGV->setVisibility(Visibility);
1027 NewGV->setThreadLocal(isThreadLocal);
1029 ValueList.push_back(NewGV);
1031 // Remember which value to use for the global initializer.
1032 if (unsigned InitID = Record[2])
1033 GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
1036 // FUNCTION: [type, callingconv, isproto, linkage, paramattr,
1037 // alignment, section, visibility, collector]
1038 case bitc::MODULE_CODE_FUNCTION: {
1039 if (Record.size() < 8)
1040 return Error("Invalid MODULE_CODE_FUNCTION record");
1041 const Type *Ty = getTypeByID(Record[0]);
1042 if (!isa<PointerType>(Ty))
1043 return Error("Function not a pointer type!");
1044 const FunctionType *FTy =
1045 dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
1047 return Error("Function not a pointer to function type!");
1049 Function *Func = new Function(FTy, GlobalValue::ExternalLinkage,
1052 Func->setCallingConv(Record[1]);
1053 bool isProto = Record[2];
1054 Func->setLinkage(GetDecodedLinkage(Record[3]));
1055 Func->setParamAttrs(getParamAttrs(Record[4]));
1057 Func->setAlignment((1 << Record[5]) >> 1);
1059 if (Record[6]-1 >= SectionTable.size())
1060 return Error("Invalid section ID");
1061 Func->setSection(SectionTable[Record[6]-1]);
1063 Func->setVisibility(GetDecodedVisibility(Record[7]));
1064 if (Record.size() > 8 && Record[8]) {
1065 if (Record[8]-1 > CollectorTable.size())
1066 return Error("Invalid collector ID");
1067 Func->setCollector(CollectorTable[Record[8]-1].c_str());
1070 ValueList.push_back(Func);
1072 // If this is a function with a body, remember the prototype we are
1073 // creating now, so that we can match up the body with them later.
1075 FunctionsWithBodies.push_back(Func);
1078 // ALIAS: [alias type, aliasee val#, linkage]
1079 // ALIAS: [alias type, aliasee val#, linkage, visibility]
1080 case bitc::MODULE_CODE_ALIAS: {
1081 if (Record.size() < 3)
1082 return Error("Invalid MODULE_ALIAS record");
1083 const Type *Ty = getTypeByID(Record[0]);
1084 if (!isa<PointerType>(Ty))
1085 return Error("Function not a pointer type!");
1087 GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
1089 // Old bitcode files didn't have visibility field.
1090 if (Record.size() > 3)
1091 NewGA->setVisibility(GetDecodedVisibility(Record[3]));
1092 ValueList.push_back(NewGA);
1093 AliasInits.push_back(std::make_pair(NewGA, Record[1]));
1096 /// MODULE_CODE_PURGEVALS: [numvals]
1097 case bitc::MODULE_CODE_PURGEVALS:
1098 // Trim down the value list to the specified size.
1099 if (Record.size() < 1 || Record[0] > ValueList.size())
1100 return Error("Invalid MODULE_PURGEVALS record");
1101 ValueList.shrinkTo(Record[0]);
1107 return Error("Premature end of bitstream");
1111 bool BitcodeReader::ParseBitcode() {
1114 if (Buffer->getBufferSize() & 3)
1115 return Error("Bitcode stream should be a multiple of 4 bytes in length");
1117 unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
1118 Stream.init(BufPtr, BufPtr+Buffer->getBufferSize());
1120 // Sniff for the signature.
1121 if (Stream.Read(8) != 'B' ||
1122 Stream.Read(8) != 'C' ||
1123 Stream.Read(4) != 0x0 ||
1124 Stream.Read(4) != 0xC ||
1125 Stream.Read(4) != 0xE ||
1126 Stream.Read(4) != 0xD)
1127 return Error("Invalid bitcode signature");
1129 // We expect a number of well-defined blocks, though we don't necessarily
1130 // need to understand them all.
1131 while (!Stream.AtEndOfStream()) {
1132 unsigned Code = Stream.ReadCode();
1134 if (Code != bitc::ENTER_SUBBLOCK)
1135 return Error("Invalid record at top-level");
1137 unsigned BlockID = Stream.ReadSubBlockID();
1139 // We only know the MODULE subblock ID.
1141 case bitc::BLOCKINFO_BLOCK_ID:
1142 if (Stream.ReadBlockInfoBlock())
1143 return Error("Malformed BlockInfoBlock");
1145 case bitc::MODULE_BLOCK_ID:
1146 if (ParseModule(Buffer->getBufferIdentifier()))
1150 if (Stream.SkipBlock())
1151 return Error("Malformed block record");
1160 /// ParseFunctionBody - Lazily parse the specified function body block.
1161 bool BitcodeReader::ParseFunctionBody(Function *F) {
1162 if (Stream.EnterSubBlock(bitc::FUNCTION_BLOCK_ID))
1163 return Error("Malformed block record");
1165 unsigned ModuleValueListSize = ValueList.size();
1167 // Add all the function arguments to the value table.
1168 for(Function::arg_iterator I = F->arg_begin(), E = F->arg_end(); I != E; ++I)
1169 ValueList.push_back(I);
1171 unsigned NextValueNo = ValueList.size();
1172 BasicBlock *CurBB = 0;
1173 unsigned CurBBNo = 0;
1175 // Read all the records.
1176 SmallVector<uint64_t, 64> Record;
1178 unsigned Code = Stream.ReadCode();
1179 if (Code == bitc::END_BLOCK) {
1180 if (Stream.ReadBlockEnd())
1181 return Error("Error at end of function block");
1185 if (Code == bitc::ENTER_SUBBLOCK) {
1186 switch (Stream.ReadSubBlockID()) {
1187 default: // Skip unknown content.
1188 if (Stream.SkipBlock())
1189 return Error("Malformed block record");
1191 case bitc::CONSTANTS_BLOCK_ID:
1192 if (ParseConstants()) return true;
1193 NextValueNo = ValueList.size();
1195 case bitc::VALUE_SYMTAB_BLOCK_ID:
1196 if (ParseValueSymbolTable()) return true;
1202 if (Code == bitc::DEFINE_ABBREV) {
1203 Stream.ReadAbbrevRecord();
1210 switch (Stream.ReadRecord(Code, Record)) {
1211 default: // Default behavior: reject
1212 return Error("Unknown instruction");
1213 case bitc::FUNC_CODE_DECLAREBLOCKS: // DECLAREBLOCKS: [nblocks]
1214 if (Record.size() < 1 || Record[0] == 0)
1215 return Error("Invalid DECLAREBLOCKS record");
1216 // Create all the basic blocks for the function.
1217 FunctionBBs.resize(Record[0]);
1218 for (unsigned i = 0, e = FunctionBBs.size(); i != e; ++i)
1219 FunctionBBs[i] = new BasicBlock("", F);
1220 CurBB = FunctionBBs[0];
1223 case bitc::FUNC_CODE_INST_BB_UNWINDDEST: // BB_UNWINDDEST: [bb#]
1224 if (CurBB->getUnwindDest())
1225 return Error("Only permit one BB_UNWINDDEST per BB");
1226 if (Record.size() != 1)
1227 return Error("Invalid BB_UNWINDDEST record");
1229 CurBB->setUnwindDest(getBasicBlock(Record[0]));
1232 case bitc::FUNC_CODE_INST_BINOP: { // BINOP: [opval, ty, opval, opcode]
1235 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1236 getValue(Record, OpNum, LHS->getType(), RHS) ||
1237 OpNum+1 != Record.size())
1238 return Error("Invalid BINOP record");
1240 int Opc = GetDecodedBinaryOpcode(Record[OpNum], LHS->getType());
1241 if (Opc == -1) return Error("Invalid BINOP record");
1242 I = BinaryOperator::create((Instruction::BinaryOps)Opc, LHS, RHS);
1245 case bitc::FUNC_CODE_INST_CAST: { // CAST: [opval, opty, destty, castopc]
1248 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1249 OpNum+2 != Record.size())
1250 return Error("Invalid CAST record");
1252 const Type *ResTy = getTypeByID(Record[OpNum]);
1253 int Opc = GetDecodedCastOpcode(Record[OpNum+1]);
1254 if (Opc == -1 || ResTy == 0)
1255 return Error("Invalid CAST record");
1256 I = CastInst::create((Instruction::CastOps)Opc, Op, ResTy);
1259 case bitc::FUNC_CODE_INST_GEP: { // GEP: [n x operands]
1262 if (getValueTypePair(Record, OpNum, NextValueNo, BasePtr))
1263 return Error("Invalid GEP record");
1265 SmallVector<Value*, 16> GEPIdx;
1266 while (OpNum != Record.size()) {
1268 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1269 return Error("Invalid GEP record");
1270 GEPIdx.push_back(Op);
1273 I = new GetElementPtrInst(BasePtr, GEPIdx.begin(), GEPIdx.end());
1277 case bitc::FUNC_CODE_INST_SELECT: { // SELECT: [opval, ty, opval, opval]
1279 Value *TrueVal, *FalseVal, *Cond;
1280 if (getValueTypePair(Record, OpNum, NextValueNo, TrueVal) ||
1281 getValue(Record, OpNum, TrueVal->getType(), FalseVal) ||
1282 getValue(Record, OpNum, Type::Int1Ty, Cond))
1283 return Error("Invalid SELECT record");
1285 I = new SelectInst(Cond, TrueVal, FalseVal);
1289 case bitc::FUNC_CODE_INST_EXTRACTELT: { // EXTRACTELT: [opty, opval, opval]
1292 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
1293 getValue(Record, OpNum, Type::Int32Ty, Idx))
1294 return Error("Invalid EXTRACTELT record");
1295 I = new ExtractElementInst(Vec, Idx);
1299 case bitc::FUNC_CODE_INST_INSERTELT: { // INSERTELT: [ty, opval,opval,opval]
1301 Value *Vec, *Elt, *Idx;
1302 if (getValueTypePair(Record, OpNum, NextValueNo, Vec) ||
1303 getValue(Record, OpNum,
1304 cast<VectorType>(Vec->getType())->getElementType(), Elt) ||
1305 getValue(Record, OpNum, Type::Int32Ty, Idx))
1306 return Error("Invalid INSERTELT record");
1307 I = new InsertElementInst(Vec, Elt, Idx);
1311 case bitc::FUNC_CODE_INST_SHUFFLEVEC: {// SHUFFLEVEC: [opval,ty,opval,opval]
1313 Value *Vec1, *Vec2, *Mask;
1314 if (getValueTypePair(Record, OpNum, NextValueNo, Vec1) ||
1315 getValue(Record, OpNum, Vec1->getType(), Vec2))
1316 return Error("Invalid SHUFFLEVEC record");
1318 const Type *MaskTy =
1319 VectorType::get(Type::Int32Ty,
1320 cast<VectorType>(Vec1->getType())->getNumElements());
1322 if (getValue(Record, OpNum, MaskTy, Mask))
1323 return Error("Invalid SHUFFLEVEC record");
1324 I = new ShuffleVectorInst(Vec1, Vec2, Mask);
1328 case bitc::FUNC_CODE_INST_CMP: { // CMP: [opty, opval, opval, pred]
1331 if (getValueTypePair(Record, OpNum, NextValueNo, LHS) ||
1332 getValue(Record, OpNum, LHS->getType(), RHS) ||
1333 OpNum+1 != Record.size())
1334 return Error("Invalid CMP record");
1336 if (LHS->getType()->isFPOrFPVector())
1337 I = new FCmpInst((FCmpInst::Predicate)Record[OpNum], LHS, RHS);
1339 I = new ICmpInst((ICmpInst::Predicate)Record[OpNum], LHS, RHS);
1342 case bitc::FUNC_CODE_INST_GETRESULT: { // GETRESULT: [ty, val, n]
1343 if (Record.size() != 2)
1344 return Error("Invalid GETRESULT record");
1347 getValueTypePair(Record, OpNum, NextValueNo, Op);
1348 unsigned Index = Record[1];
1349 I = new GetResultInst(Op, Index);
1353 case bitc::FUNC_CODE_INST_RET: // RET: [opty,opval<optional>]
1355 unsigned Size = Record.size();
1357 I = new ReturnInst();
1361 SmallVector<Value *,4> Vs;
1364 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1365 return Error("Invalid RET record");
1367 } while(OpNum != Record.size());
1369 // SmallVector Vs has at least one element.
1370 I = new ReturnInst(&Vs[0], Vs.size());
1374 case bitc::FUNC_CODE_INST_BR: { // BR: [bb#, bb#, opval] or [bb#]
1375 if (Record.size() != 1 && Record.size() != 3)
1376 return Error("Invalid BR record");
1377 BasicBlock *TrueDest = getBasicBlock(Record[0]);
1379 return Error("Invalid BR record");
1381 if (Record.size() == 1)
1382 I = new BranchInst(TrueDest);
1384 BasicBlock *FalseDest = getBasicBlock(Record[1]);
1385 Value *Cond = getFnValueByID(Record[2], Type::Int1Ty);
1386 if (FalseDest == 0 || Cond == 0)
1387 return Error("Invalid BR record");
1388 I = new BranchInst(TrueDest, FalseDest, Cond);
1392 case bitc::FUNC_CODE_INST_SWITCH: { // SWITCH: [opty, opval, n, n x ops]
1393 if (Record.size() < 3 || (Record.size() & 1) == 0)
1394 return Error("Invalid SWITCH record");
1395 const Type *OpTy = getTypeByID(Record[0]);
1396 Value *Cond = getFnValueByID(Record[1], OpTy);
1397 BasicBlock *Default = getBasicBlock(Record[2]);
1398 if (OpTy == 0 || Cond == 0 || Default == 0)
1399 return Error("Invalid SWITCH record");
1400 unsigned NumCases = (Record.size()-3)/2;
1401 SwitchInst *SI = new SwitchInst(Cond, Default, NumCases);
1402 for (unsigned i = 0, e = NumCases; i != e; ++i) {
1403 ConstantInt *CaseVal =
1404 dyn_cast_or_null<ConstantInt>(getFnValueByID(Record[3+i*2], OpTy));
1405 BasicBlock *DestBB = getBasicBlock(Record[1+3+i*2]);
1406 if (CaseVal == 0 || DestBB == 0) {
1408 return Error("Invalid SWITCH record!");
1410 SI->addCase(CaseVal, DestBB);
1416 case bitc::FUNC_CODE_INST_INVOKE: {
1417 // INVOKE: [attrs, cc, normBB, unwindBB, fnty, op0,op1,op2, ...]
1418 if (Record.size() < 4) return Error("Invalid INVOKE record");
1419 PAListPtr PAL = getParamAttrs(Record[0]);
1420 unsigned CCInfo = Record[1];
1421 BasicBlock *NormalBB = getBasicBlock(Record[2]);
1422 BasicBlock *UnwindBB = getBasicBlock(Record[3]);
1426 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
1427 return Error("Invalid INVOKE record");
1429 const PointerType *CalleeTy = dyn_cast<PointerType>(Callee->getType());
1430 const FunctionType *FTy = !CalleeTy ? 0 :
1431 dyn_cast<FunctionType>(CalleeTy->getElementType());
1433 // Check that the right number of fixed parameters are here.
1434 if (FTy == 0 || NormalBB == 0 || UnwindBB == 0 ||
1435 Record.size() < OpNum+FTy->getNumParams())
1436 return Error("Invalid INVOKE record");
1438 SmallVector<Value*, 16> Ops;
1439 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
1440 Ops.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
1441 if (Ops.back() == 0) return Error("Invalid INVOKE record");
1444 if (!FTy->isVarArg()) {
1445 if (Record.size() != OpNum)
1446 return Error("Invalid INVOKE record");
1448 // Read type/value pairs for varargs params.
1449 while (OpNum != Record.size()) {
1451 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1452 return Error("Invalid INVOKE record");
1457 I = new InvokeInst(Callee, NormalBB, UnwindBB, Ops.begin(), Ops.end());
1458 cast<InvokeInst>(I)->setCallingConv(CCInfo);
1459 cast<InvokeInst>(I)->setParamAttrs(PAL);
1462 case bitc::FUNC_CODE_INST_UNWIND: // UNWIND
1463 I = new UnwindInst();
1465 case bitc::FUNC_CODE_INST_UNREACHABLE: // UNREACHABLE
1466 I = new UnreachableInst();
1468 case bitc::FUNC_CODE_INST_PHI: { // PHI: [ty, val0,bb0, ...]
1469 if (Record.size() < 1 || ((Record.size()-1)&1))
1470 return Error("Invalid PHI record");
1471 const Type *Ty = getTypeByID(Record[0]);
1472 if (!Ty) return Error("Invalid PHI record");
1474 PHINode *PN = new PHINode(Ty);
1475 PN->reserveOperandSpace(Record.size()-1);
1477 for (unsigned i = 0, e = Record.size()-1; i != e; i += 2) {
1478 Value *V = getFnValueByID(Record[1+i], Ty);
1479 BasicBlock *BB = getBasicBlock(Record[2+i]);
1480 if (!V || !BB) return Error("Invalid PHI record");
1481 PN->addIncoming(V, BB);
1487 case bitc::FUNC_CODE_INST_MALLOC: { // MALLOC: [instty, op, align]
1488 if (Record.size() < 3)
1489 return Error("Invalid MALLOC record");
1490 const PointerType *Ty =
1491 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
1492 Value *Size = getFnValueByID(Record[1], Type::Int32Ty);
1493 unsigned Align = Record[2];
1494 if (!Ty || !Size) return Error("Invalid MALLOC record");
1495 I = new MallocInst(Ty->getElementType(), Size, (1 << Align) >> 1);
1498 case bitc::FUNC_CODE_INST_FREE: { // FREE: [op, opty]
1501 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1502 OpNum != Record.size())
1503 return Error("Invalid FREE record");
1504 I = new FreeInst(Op);
1507 case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, op, align]
1508 if (Record.size() < 3)
1509 return Error("Invalid ALLOCA record");
1510 const PointerType *Ty =
1511 dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
1512 Value *Size = getFnValueByID(Record[1], Type::Int32Ty);
1513 unsigned Align = Record[2];
1514 if (!Ty || !Size) return Error("Invalid ALLOCA record");
1515 I = new AllocaInst(Ty->getElementType(), Size, (1 << Align) >> 1);
1518 case bitc::FUNC_CODE_INST_LOAD: { // LOAD: [opty, op, align, vol]
1521 if (getValueTypePair(Record, OpNum, NextValueNo, Op) ||
1522 OpNum+2 != Record.size())
1523 return Error("Invalid LOAD record");
1525 I = new LoadInst(Op, "", Record[OpNum+1], (1 << Record[OpNum]) >> 1);
1528 case bitc::FUNC_CODE_INST_STORE2: { // STORE2:[ptrty, ptr, val, align, vol]
1531 if (getValueTypePair(Record, OpNum, NextValueNo, Ptr) ||
1532 getValue(Record, OpNum,
1533 cast<PointerType>(Ptr->getType())->getElementType(), Val) ||
1534 OpNum+2 != Record.size())
1535 return Error("Invalid STORE record");
1537 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
1540 case bitc::FUNC_CODE_INST_STORE: { // STORE:[val, valty, ptr, align, vol]
1541 // FIXME: Legacy form of store instruction. Should be removed in LLVM 3.0.
1544 if (getValueTypePair(Record, OpNum, NextValueNo, Val) ||
1545 getValue(Record, OpNum, PointerType::getUnqual(Val->getType()), Ptr)||
1546 OpNum+2 != Record.size())
1547 return Error("Invalid STORE record");
1549 I = new StoreInst(Val, Ptr, Record[OpNum+1], (1 << Record[OpNum]) >> 1);
1552 case bitc::FUNC_CODE_INST_CALL: {
1553 // CALL: [paramattrs, cc, fnty, fnid, arg0, arg1...]
1554 if (Record.size() < 3)
1555 return Error("Invalid CALL record");
1557 PAListPtr PAL = getParamAttrs(Record[0]);
1558 unsigned CCInfo = Record[1];
1562 if (getValueTypePair(Record, OpNum, NextValueNo, Callee))
1563 return Error("Invalid CALL record");
1565 const PointerType *OpTy = dyn_cast<PointerType>(Callee->getType());
1566 const FunctionType *FTy = 0;
1567 if (OpTy) FTy = dyn_cast<FunctionType>(OpTy->getElementType());
1568 if (!FTy || Record.size() < FTy->getNumParams()+OpNum)
1569 return Error("Invalid CALL record");
1571 SmallVector<Value*, 16> Args;
1572 // Read the fixed params.
1573 for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i, ++OpNum) {
1574 if (FTy->getParamType(i)->getTypeID()==Type::LabelTyID)
1575 Args.push_back(getBasicBlock(Record[OpNum]));
1577 Args.push_back(getFnValueByID(Record[OpNum], FTy->getParamType(i)));
1578 if (Args.back() == 0) return Error("Invalid CALL record");
1581 // Read type/value pairs for varargs params.
1582 if (!FTy->isVarArg()) {
1583 if (OpNum != Record.size())
1584 return Error("Invalid CALL record");
1586 while (OpNum != Record.size()) {
1588 if (getValueTypePair(Record, OpNum, NextValueNo, Op))
1589 return Error("Invalid CALL record");
1594 I = new CallInst(Callee, Args.begin(), Args.end());
1595 cast<CallInst>(I)->setCallingConv(CCInfo>>1);
1596 cast<CallInst>(I)->setTailCall(CCInfo & 1);
1597 cast<CallInst>(I)->setParamAttrs(PAL);
1600 case bitc::FUNC_CODE_INST_VAARG: { // VAARG: [valistty, valist, instty]
1601 if (Record.size() < 3)
1602 return Error("Invalid VAARG record");
1603 const Type *OpTy = getTypeByID(Record[0]);
1604 Value *Op = getFnValueByID(Record[1], OpTy);
1605 const Type *ResTy = getTypeByID(Record[2]);
1606 if (!OpTy || !Op || !ResTy)
1607 return Error("Invalid VAARG record");
1608 I = new VAArgInst(Op, ResTy);
1613 // Add instruction to end of current BB. If there is no current BB, reject
1617 return Error("Invalid instruction with no BB");
1619 CurBB->getInstList().push_back(I);
1621 // If this was a terminator instruction, move to the next block.
1622 if (isa<TerminatorInst>(I)) {
1624 CurBB = CurBBNo < FunctionBBs.size() ? FunctionBBs[CurBBNo] : 0;
1627 // Non-void values get registered in the value table for future use.
1628 if (I && I->getType() != Type::VoidTy)
1629 ValueList.AssignValue(I, NextValueNo++);
1632 // Check the function list for unresolved values.
1633 if (Argument *A = dyn_cast<Argument>(ValueList.back())) {
1634 if (A->getParent() == 0) {
1635 // We found at least one unresolved value. Nuke them all to avoid leaks.
1636 for (unsigned i = ModuleValueListSize, e = ValueList.size(); i != e; ++i){
1637 if ((A = dyn_cast<Argument>(ValueList.back())) && A->getParent() == 0) {
1638 A->replaceAllUsesWith(UndefValue::get(A->getType()));
1642 return Error("Never resolved value found in function!");
1646 // Trim the value list down to the size it was before we parsed this function.
1647 ValueList.shrinkTo(ModuleValueListSize);
1648 std::vector<BasicBlock*>().swap(FunctionBBs);
1653 //===----------------------------------------------------------------------===//
1654 // ModuleProvider implementation
1655 //===----------------------------------------------------------------------===//
1658 bool BitcodeReader::materializeFunction(Function *F, std::string *ErrInfo) {
1659 // If it already is material, ignore the request.
1660 if (!F->hasNotBeenReadFromBitcode()) return false;
1662 DenseMap<Function*, std::pair<uint64_t, unsigned> >::iterator DFII =
1663 DeferredFunctionInfo.find(F);
1664 assert(DFII != DeferredFunctionInfo.end() && "Deferred function not found!");
1666 // Move the bit stream to the saved position of the deferred function body and
1667 // restore the real linkage type for the function.
1668 Stream.JumpToBit(DFII->second.first);
1669 F->setLinkage((GlobalValue::LinkageTypes)DFII->second.second);
1671 if (ParseFunctionBody(F)) {
1672 if (ErrInfo) *ErrInfo = ErrorString;
1676 // Upgrade any old intrinsic calls in the function.
1677 for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
1678 E = UpgradedIntrinsics.end(); I != E; ++I) {
1679 if (I->first != I->second) {
1680 for (Value::use_iterator UI = I->first->use_begin(),
1681 UE = I->first->use_end(); UI != UE; ) {
1682 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
1683 UpgradeIntrinsicCall(CI, I->second);
1691 void BitcodeReader::dematerializeFunction(Function *F) {
1692 // If this function isn't materialized, or if it is a proto, this is a noop.
1693 if (F->hasNotBeenReadFromBitcode() || F->isDeclaration())
1696 assert(DeferredFunctionInfo.count(F) && "No info to read function later?");
1698 // Just forget the function body, we can remat it later.
1700 F->setLinkage(GlobalValue::GhostLinkage);
1704 Module *BitcodeReader::materializeModule(std::string *ErrInfo) {
1705 for (DenseMap<Function*, std::pair<uint64_t, unsigned> >::iterator I =
1706 DeferredFunctionInfo.begin(), E = DeferredFunctionInfo.end(); I != E;
1708 Function *F = I->first;
1709 if (F->hasNotBeenReadFromBitcode() &&
1710 materializeFunction(F, ErrInfo))
1714 // Upgrade any intrinsic calls that slipped through (should not happen!) and
1715 // delete the old functions to clean up. We can't do this unless the entire
1716 // module is materialized because there could always be another function body
1717 // with calls to the old function.
1718 for (std::vector<std::pair<Function*, Function*> >::iterator I =
1719 UpgradedIntrinsics.begin(), E = UpgradedIntrinsics.end(); I != E; ++I) {
1720 if (I->first != I->second) {
1721 for (Value::use_iterator UI = I->first->use_begin(),
1722 UE = I->first->use_end(); UI != UE; ) {
1723 if (CallInst* CI = dyn_cast<CallInst>(*UI++))
1724 UpgradeIntrinsicCall(CI, I->second);
1726 ValueList.replaceUsesOfWith(I->first, I->second);
1727 I->first->eraseFromParent();
1730 std::vector<std::pair<Function*, Function*> >().swap(UpgradedIntrinsics);
1736 /// This method is provided by the parent ModuleProvde class and overriden
1737 /// here. It simply releases the module from its provided and frees up our
1739 /// @brief Release our hold on the generated module
1740 Module *BitcodeReader::releaseModule(std::string *ErrInfo) {
1741 // Since we're losing control of this Module, we must hand it back complete
1742 Module *M = ModuleProvider::releaseModule(ErrInfo);
1748 //===----------------------------------------------------------------------===//
1749 // External interface
1750 //===----------------------------------------------------------------------===//
1752 /// getBitcodeModuleProvider - lazy function-at-a-time loading from a file.
1754 ModuleProvider *llvm::getBitcodeModuleProvider(MemoryBuffer *Buffer,
1755 std::string *ErrMsg) {
1756 BitcodeReader *R = new BitcodeReader(Buffer);
1757 if (R->ParseBitcode()) {
1759 *ErrMsg = R->getErrorString();
1761 // Don't let the BitcodeReader dtor delete 'Buffer'.
1762 R->releaseMemoryBuffer();
1769 /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
1770 /// If an error occurs, return null and fill in *ErrMsg if non-null.
1771 Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, std::string *ErrMsg){
1773 R = static_cast<BitcodeReader*>(getBitcodeModuleProvider(Buffer, ErrMsg));
1776 // Read in the entire module.
1777 Module *M = R->materializeModule(ErrMsg);
1779 // Don't let the BitcodeReader dtor delete 'Buffer', regardless of whether
1780 // there was an error.
1781 R->releaseMemoryBuffer();
1783 // If there was no error, tell ModuleProvider not to delete it when its dtor
1786 M = R->releaseModule(ErrMsg);