2007-04-22 06:23:29 +00:00
|
|
|
//===- BitcodeReader.cpp - Internal BitcodeReader implementation ----------===//
|
|
|
|
//
|
|
|
|
// The LLVM Compiler Infrastructure
|
|
|
|
//
|
|
|
|
// This file was developed by Chris Lattner and is distributed under
|
|
|
|
// the University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
//
|
|
|
|
// This header defines the BitcodeReader class.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
2007-04-29 07:54:31 +00:00
|
|
|
#include "llvm/Bitcode/ReaderWriter.h"
|
2007-04-22 06:23:29 +00:00
|
|
|
#include "BitcodeReader.h"
|
|
|
|
#include "llvm/Bitcode/BitstreamReader.h"
|
2007-04-24 03:30:34 +00:00
|
|
|
#include "llvm/Constants.h"
|
2007-04-22 06:23:29 +00:00
|
|
|
#include "llvm/DerivedTypes.h"
|
|
|
|
#include "llvm/Module.h"
|
2007-04-23 21:26:05 +00:00
|
|
|
#include "llvm/ADT/SmallString.h"
|
2007-04-24 04:04:35 +00:00
|
|
|
#include "llvm/Support/MathExtras.h"
|
2007-04-29 07:54:31 +00:00
|
|
|
#include "llvm/Support/MemoryBuffer.h"
|
2007-04-22 06:23:29 +00:00
|
|
|
using namespace llvm;
|
|
|
|
|
2007-04-29 07:54:31 +00:00
|
|
|
BitcodeReader::~BitcodeReader() {
|
|
|
|
delete Buffer;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-04-22 06:23:29 +00:00
|
|
|
/// ConvertToString - Convert a string from a record into an std::string, return
|
|
|
|
/// true on failure.
|
2007-04-23 21:26:05 +00:00
|
|
|
template<typename StrTy>
|
2007-04-22 06:23:29 +00:00
|
|
|
static bool ConvertToString(SmallVector<uint64_t, 64> &Record, unsigned Idx,
|
2007-04-23 21:26:05 +00:00
|
|
|
StrTy &Result) {
|
2007-04-22 06:23:29 +00:00
|
|
|
if (Record.size() < Idx+1 || Record.size() < Record[Idx]+Idx+1)
|
|
|
|
return true;
|
|
|
|
|
|
|
|
for (unsigned i = 0, e = Record[Idx]; i != e; ++i)
|
|
|
|
Result += (char)Record[Idx+i+1];
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
static GlobalValue::LinkageTypes GetDecodedLinkage(unsigned Val) {
|
|
|
|
switch (Val) {
|
|
|
|
default: // Map unknown/new linkages to external
|
|
|
|
case 0: return GlobalValue::ExternalLinkage;
|
|
|
|
case 1: return GlobalValue::WeakLinkage;
|
|
|
|
case 2: return GlobalValue::AppendingLinkage;
|
|
|
|
case 3: return GlobalValue::InternalLinkage;
|
|
|
|
case 4: return GlobalValue::LinkOnceLinkage;
|
|
|
|
case 5: return GlobalValue::DLLImportLinkage;
|
|
|
|
case 6: return GlobalValue::DLLExportLinkage;
|
|
|
|
case 7: return GlobalValue::ExternalWeakLinkage;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static GlobalValue::VisibilityTypes GetDecodedVisibility(unsigned Val) {
|
|
|
|
switch (Val) {
|
|
|
|
default: // Map unknown visibilities to default.
|
|
|
|
case 0: return GlobalValue::DefaultVisibility;
|
|
|
|
case 1: return GlobalValue::HiddenVisibility;
|
2007-04-29 20:56:48 +00:00
|
|
|
case 2: return GlobalValue::ProtectedVisibility;
|
2007-04-22 06:23:29 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-04-24 07:07:11 +00:00
|
|
|
static int GetDecodedCastOpcode(unsigned Val) {
|
|
|
|
switch (Val) {
|
|
|
|
default: return -1;
|
|
|
|
case bitc::CAST_TRUNC : return Instruction::Trunc;
|
|
|
|
case bitc::CAST_ZEXT : return Instruction::ZExt;
|
|
|
|
case bitc::CAST_SEXT : return Instruction::SExt;
|
|
|
|
case bitc::CAST_FPTOUI : return Instruction::FPToUI;
|
|
|
|
case bitc::CAST_FPTOSI : return Instruction::FPToSI;
|
|
|
|
case bitc::CAST_UITOFP : return Instruction::UIToFP;
|
|
|
|
case bitc::CAST_SITOFP : return Instruction::SIToFP;
|
|
|
|
case bitc::CAST_FPTRUNC : return Instruction::FPTrunc;
|
|
|
|
case bitc::CAST_FPEXT : return Instruction::FPExt;
|
|
|
|
case bitc::CAST_PTRTOINT: return Instruction::PtrToInt;
|
|
|
|
case bitc::CAST_INTTOPTR: return Instruction::IntToPtr;
|
|
|
|
case bitc::CAST_BITCAST : return Instruction::BitCast;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
static int GetDecodedBinaryOpcode(unsigned Val, const Type *Ty) {
|
|
|
|
switch (Val) {
|
|
|
|
default: return -1;
|
|
|
|
case bitc::BINOP_ADD: return Instruction::Add;
|
|
|
|
case bitc::BINOP_SUB: return Instruction::Sub;
|
|
|
|
case bitc::BINOP_MUL: return Instruction::Mul;
|
|
|
|
case bitc::BINOP_UDIV: return Instruction::UDiv;
|
|
|
|
case bitc::BINOP_SDIV:
|
|
|
|
return Ty->isFPOrFPVector() ? Instruction::FDiv : Instruction::SDiv;
|
|
|
|
case bitc::BINOP_UREM: return Instruction::URem;
|
|
|
|
case bitc::BINOP_SREM:
|
|
|
|
return Ty->isFPOrFPVector() ? Instruction::FRem : Instruction::SRem;
|
|
|
|
case bitc::BINOP_SHL: return Instruction::Shl;
|
|
|
|
case bitc::BINOP_LSHR: return Instruction::LShr;
|
|
|
|
case bitc::BINOP_ASHR: return Instruction::AShr;
|
|
|
|
case bitc::BINOP_AND: return Instruction::And;
|
|
|
|
case bitc::BINOP_OR: return Instruction::Or;
|
|
|
|
case bitc::BINOP_XOR: return Instruction::Xor;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-04-24 05:48:56 +00:00
|
|
|
namespace {
|
|
|
|
/// @brief A class for maintaining the slot number definition
|
|
|
|
/// as a placeholder for the actual definition for forward constants defs.
|
|
|
|
class ConstantPlaceHolder : public ConstantExpr {
|
|
|
|
ConstantPlaceHolder(); // DO NOT IMPLEMENT
|
|
|
|
void operator=(const ConstantPlaceHolder &); // DO NOT IMPLEMENT
|
2007-04-24 07:07:11 +00:00
|
|
|
public:
|
|
|
|
Use Op;
|
|
|
|
ConstantPlaceHolder(const Type *Ty)
|
|
|
|
: ConstantExpr(Ty, Instruction::UserOp1, &Op, 1),
|
|
|
|
Op(UndefValue::get(Type::Int32Ty), this) {
|
2007-04-24 05:48:56 +00:00
|
|
|
}
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
Constant *BitcodeReaderValueList::getConstantFwdRef(unsigned Idx,
|
|
|
|
const Type *Ty) {
|
|
|
|
if (Idx >= size()) {
|
|
|
|
// Insert a bunch of null values.
|
|
|
|
Uses.resize(Idx+1);
|
|
|
|
OperandList = &Uses[0];
|
|
|
|
NumOperands = Idx+1;
|
|
|
|
}
|
|
|
|
|
2007-04-24 07:07:11 +00:00
|
|
|
if (Uses[Idx]) {
|
|
|
|
assert(Ty == getOperand(Idx)->getType() &&
|
|
|
|
"Type mismatch in constant table!");
|
2007-04-24 05:48:56 +00:00
|
|
|
return cast<Constant>(getOperand(Idx));
|
2007-04-24 07:07:11 +00:00
|
|
|
}
|
2007-04-24 05:48:56 +00:00
|
|
|
|
|
|
|
// Create and return a placeholder, which will later be RAUW'd.
|
|
|
|
Constant *C = new ConstantPlaceHolder(Ty);
|
|
|
|
Uses[Idx].init(C, this);
|
|
|
|
return C;
|
|
|
|
}
|
|
|
|
|
2007-04-22 06:23:29 +00:00
|
|
|
|
|
|
|
const Type *BitcodeReader::getTypeByID(unsigned ID, bool isTypeTable) {
|
|
|
|
// If the TypeID is in range, return it.
|
|
|
|
if (ID < TypeList.size())
|
|
|
|
return TypeList[ID].get();
|
|
|
|
if (!isTypeTable) return 0;
|
|
|
|
|
|
|
|
// The type table allows forward references. Push as many Opaque types as
|
|
|
|
// needed to get up to ID.
|
|
|
|
while (TypeList.size() <= ID)
|
|
|
|
TypeList.push_back(OpaqueType::get());
|
|
|
|
return TypeList.back().get();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
bool BitcodeReader::ParseTypeTable(BitstreamReader &Stream) {
|
|
|
|
if (Stream.EnterSubBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
|
|
|
|
if (!TypeList.empty())
|
|
|
|
return Error("Multiple TYPE_BLOCKs found!");
|
|
|
|
|
|
|
|
SmallVector<uint64_t, 64> Record;
|
|
|
|
unsigned NumRecords = 0;
|
|
|
|
|
|
|
|
// Read all the records for this type table.
|
|
|
|
while (1) {
|
|
|
|
unsigned Code = Stream.ReadCode();
|
|
|
|
if (Code == bitc::END_BLOCK) {
|
|
|
|
if (NumRecords != TypeList.size())
|
|
|
|
return Error("Invalid type forward reference in TYPE_BLOCK");
|
2007-04-24 18:15:21 +00:00
|
|
|
if (Stream.ReadBlockEnd())
|
|
|
|
return Error("Error at end of type table block");
|
|
|
|
return false;
|
2007-04-22 06:23:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (Code == bitc::ENTER_SUBBLOCK) {
|
|
|
|
// No known subblocks, always skip them.
|
|
|
|
Stream.ReadSubBlockID();
|
|
|
|
if (Stream.SkipBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2007-04-23 16:04:05 +00:00
|
|
|
if (Code == bitc::DEFINE_ABBREV) {
|
2007-04-23 18:58:34 +00:00
|
|
|
Stream.ReadAbbrevRecord();
|
|
|
|
continue;
|
2007-04-22 06:23:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Read a record.
|
|
|
|
Record.clear();
|
|
|
|
const Type *ResultTy = 0;
|
|
|
|
switch (Stream.ReadRecord(Code, Record)) {
|
|
|
|
default: // Default behavior: unknown type.
|
|
|
|
ResultTy = 0;
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_NUMENTRY: // TYPE_CODE_NUMENTRY: [numentries]
|
|
|
|
// TYPE_CODE_NUMENTRY contains a count of the number of types in the
|
|
|
|
// type list. This allows us to reserve space.
|
|
|
|
if (Record.size() < 1)
|
|
|
|
return Error("Invalid TYPE_CODE_NUMENTRY record");
|
|
|
|
TypeList.reserve(Record[0]);
|
|
|
|
continue;
|
|
|
|
case bitc::TYPE_CODE_META: // TYPE_CODE_META: [metacode]...
|
|
|
|
// No metadata supported yet.
|
|
|
|
if (Record.size() < 1)
|
|
|
|
return Error("Invalid TYPE_CODE_META record");
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case bitc::TYPE_CODE_VOID: // VOID
|
|
|
|
ResultTy = Type::VoidTy;
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_FLOAT: // FLOAT
|
|
|
|
ResultTy = Type::FloatTy;
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_DOUBLE: // DOUBLE
|
|
|
|
ResultTy = Type::DoubleTy;
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_LABEL: // LABEL
|
|
|
|
ResultTy = Type::LabelTy;
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_OPAQUE: // OPAQUE
|
|
|
|
ResultTy = 0;
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_INTEGER: // INTEGER: [width]
|
|
|
|
if (Record.size() < 1)
|
|
|
|
return Error("Invalid Integer type record");
|
|
|
|
|
|
|
|
ResultTy = IntegerType::get(Record[0]);
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_POINTER: // POINTER: [pointee type]
|
|
|
|
if (Record.size() < 1)
|
|
|
|
return Error("Invalid POINTER type record");
|
|
|
|
ResultTy = PointerType::get(getTypeByID(Record[0], true));
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_FUNCTION: {
|
|
|
|
// FUNCTION: [vararg, retty, #pararms, paramty N]
|
|
|
|
if (Record.size() < 3 || Record.size() < Record[2]+3)
|
|
|
|
return Error("Invalid FUNCTION type record");
|
|
|
|
std::vector<const Type*> ArgTys;
|
|
|
|
for (unsigned i = 0, e = Record[2]; i != e; ++i)
|
|
|
|
ArgTys.push_back(getTypeByID(Record[3+i], true));
|
|
|
|
|
|
|
|
// FIXME: PARAM TYS.
|
|
|
|
ResultTy = FunctionType::get(getTypeByID(Record[1], true), ArgTys,
|
|
|
|
Record[0]);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::TYPE_CODE_STRUCT: { // STRUCT: [ispacked, #elts, eltty x N]
|
|
|
|
if (Record.size() < 2 || Record.size() < Record[1]+2)
|
|
|
|
return Error("Invalid STRUCT type record");
|
|
|
|
std::vector<const Type*> EltTys;
|
|
|
|
for (unsigned i = 0, e = Record[1]; i != e; ++i)
|
|
|
|
EltTys.push_back(getTypeByID(Record[2+i], true));
|
|
|
|
ResultTy = StructType::get(EltTys, Record[0]);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
|
|
|
|
if (Record.size() < 2)
|
|
|
|
return Error("Invalid ARRAY type record");
|
|
|
|
ResultTy = ArrayType::get(getTypeByID(Record[1], true), Record[0]);
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_CODE_VECTOR: // VECTOR: [numelts, eltty]
|
|
|
|
if (Record.size() < 2)
|
|
|
|
return Error("Invalid VECTOR type record");
|
|
|
|
ResultTy = VectorType::get(getTypeByID(Record[1], true), Record[0]);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (NumRecords == TypeList.size()) {
|
|
|
|
// If this is a new type slot, just append it.
|
|
|
|
TypeList.push_back(ResultTy ? ResultTy : OpaqueType::get());
|
|
|
|
++NumRecords;
|
|
|
|
} else if (ResultTy == 0) {
|
|
|
|
// Otherwise, this was forward referenced, so an opaque type was created,
|
|
|
|
// but the result type is actually just an opaque. Leave the one we
|
|
|
|
// created previously.
|
|
|
|
++NumRecords;
|
|
|
|
} else {
|
|
|
|
// Otherwise, this was forward referenced, so an opaque type was created.
|
|
|
|
// Resolve the opaque type to the real type now.
|
|
|
|
assert(NumRecords < TypeList.size() && "Typelist imbalance");
|
|
|
|
const OpaqueType *OldTy = cast<OpaqueType>(TypeList[NumRecords++].get());
|
|
|
|
|
|
|
|
// Don't directly push the new type on the Tab. Instead we want to replace
|
|
|
|
// the opaque type we previously inserted with the new concrete value. The
|
|
|
|
// refinement from the abstract (opaque) type to the new type causes all
|
|
|
|
// uses of the abstract type to use the concrete type (NewTy). This will
|
|
|
|
// also cause the opaque type to be deleted.
|
|
|
|
const_cast<OpaqueType*>(OldTy)->refineAbstractTypeTo(ResultTy);
|
|
|
|
|
|
|
|
// This should have replaced the old opaque type with the new type in the
|
2007-04-24 04:04:35 +00:00
|
|
|
// value table... or with a preexisting type that was already in the
|
|
|
|
// system. Let's just make sure it did.
|
2007-04-22 06:23:29 +00:00
|
|
|
assert(TypeList[NumRecords-1].get() != OldTy &&
|
|
|
|
"refineAbstractType didn't work!");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
bool BitcodeReader::ParseTypeSymbolTable(BitstreamReader &Stream) {
|
|
|
|
if (Stream.EnterSubBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
|
|
|
|
SmallVector<uint64_t, 64> Record;
|
|
|
|
|
|
|
|
// Read all the records for this type table.
|
|
|
|
std::string TypeName;
|
|
|
|
while (1) {
|
|
|
|
unsigned Code = Stream.ReadCode();
|
2007-04-24 18:15:21 +00:00
|
|
|
if (Code == bitc::END_BLOCK) {
|
|
|
|
if (Stream.ReadBlockEnd())
|
|
|
|
return Error("Error at end of type symbol table block");
|
|
|
|
return false;
|
|
|
|
}
|
2007-04-22 06:23:29 +00:00
|
|
|
|
|
|
|
if (Code == bitc::ENTER_SUBBLOCK) {
|
|
|
|
// No known subblocks, always skip them.
|
|
|
|
Stream.ReadSubBlockID();
|
|
|
|
if (Stream.SkipBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2007-04-23 16:04:05 +00:00
|
|
|
if (Code == bitc::DEFINE_ABBREV) {
|
2007-04-23 18:58:34 +00:00
|
|
|
Stream.ReadAbbrevRecord();
|
|
|
|
continue;
|
2007-04-22 06:23:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Read a record.
|
|
|
|
Record.clear();
|
|
|
|
switch (Stream.ReadRecord(Code, Record)) {
|
|
|
|
default: // Default behavior: unknown type.
|
|
|
|
break;
|
2007-04-24 00:18:21 +00:00
|
|
|
case bitc::TST_CODE_ENTRY: // TST_ENTRY: [typeid, namelen, namechar x N]
|
2007-04-22 06:23:29 +00:00
|
|
|
if (ConvertToString(Record, 1, TypeName))
|
|
|
|
return Error("Invalid TST_ENTRY record");
|
|
|
|
unsigned TypeID = Record[0];
|
|
|
|
if (TypeID >= TypeList.size())
|
|
|
|
return Error("Invalid Type ID in TST_ENTRY record");
|
|
|
|
|
|
|
|
TheModule->addTypeName(TypeName, TypeList[TypeID].get());
|
|
|
|
TypeName.clear();
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-04-23 21:26:05 +00:00
|
|
|
bool BitcodeReader::ParseValueSymbolTable(BitstreamReader &Stream) {
|
|
|
|
if (Stream.EnterSubBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
|
|
|
|
SmallVector<uint64_t, 64> Record;
|
|
|
|
|
|
|
|
// Read all the records for this value table.
|
|
|
|
SmallString<128> ValueName;
|
|
|
|
while (1) {
|
|
|
|
unsigned Code = Stream.ReadCode();
|
2007-04-24 18:15:21 +00:00
|
|
|
if (Code == bitc::END_BLOCK) {
|
|
|
|
if (Stream.ReadBlockEnd())
|
|
|
|
return Error("Error at end of value symbol table block");
|
|
|
|
return false;
|
|
|
|
}
|
2007-04-23 21:26:05 +00:00
|
|
|
if (Code == bitc::ENTER_SUBBLOCK) {
|
|
|
|
// No known subblocks, always skip them.
|
|
|
|
Stream.ReadSubBlockID();
|
|
|
|
if (Stream.SkipBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (Code == bitc::DEFINE_ABBREV) {
|
|
|
|
Stream.ReadAbbrevRecord();
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Read a record.
|
|
|
|
Record.clear();
|
|
|
|
switch (Stream.ReadRecord(Code, Record)) {
|
|
|
|
default: // Default behavior: unknown type.
|
|
|
|
break;
|
2007-04-24 00:18:21 +00:00
|
|
|
case bitc::TST_CODE_ENTRY: // VST_ENTRY: [valueid, namelen, namechar x N]
|
2007-04-23 21:26:05 +00:00
|
|
|
if (ConvertToString(Record, 1, ValueName))
|
|
|
|
return Error("Invalid TST_ENTRY record");
|
|
|
|
unsigned ValueID = Record[0];
|
|
|
|
if (ValueID >= ValueList.size())
|
|
|
|
return Error("Invalid Value ID in VST_ENTRY record");
|
|
|
|
Value *V = ValueList[ValueID];
|
|
|
|
|
|
|
|
V->setName(&ValueName[0], ValueName.size());
|
|
|
|
ValueName.clear();
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-04-24 04:04:35 +00:00
|
|
|
/// DecodeSignRotatedValue - Decode a signed value stored with the sign bit in
|
|
|
|
/// the LSB for dense VBR encoding.
|
|
|
|
static uint64_t DecodeSignRotatedValue(uint64_t V) {
|
|
|
|
if ((V & 1) == 0)
|
|
|
|
return V >> 1;
|
|
|
|
if (V != 1)
|
|
|
|
return -(V >> 1);
|
|
|
|
// There is no such thing as -0 with integers. "-0" really means MININT.
|
|
|
|
return 1ULL << 63;
|
|
|
|
}
|
|
|
|
|
2007-04-26 02:46:40 +00:00
|
|
|
/// ResolveGlobalAndAliasInits - Resolve all of the initializers for global
|
|
|
|
/// values and aliases that we can.
|
|
|
|
bool BitcodeReader::ResolveGlobalAndAliasInits() {
|
|
|
|
std::vector<std::pair<GlobalVariable*, unsigned> > GlobalInitWorklist;
|
|
|
|
std::vector<std::pair<GlobalAlias*, unsigned> > AliasInitWorklist;
|
|
|
|
|
|
|
|
GlobalInitWorklist.swap(GlobalInits);
|
|
|
|
AliasInitWorklist.swap(AliasInits);
|
|
|
|
|
|
|
|
while (!GlobalInitWorklist.empty()) {
|
2007-04-26 03:27:58 +00:00
|
|
|
unsigned ValID = GlobalInitWorklist.back().second;
|
2007-04-26 02:46:40 +00:00
|
|
|
if (ValID >= ValueList.size()) {
|
|
|
|
// Not ready to resolve this yet, it requires something later in the file.
|
2007-04-26 03:27:58 +00:00
|
|
|
GlobalInits.push_back(GlobalInitWorklist.back());
|
2007-04-26 02:46:40 +00:00
|
|
|
} else {
|
|
|
|
if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
|
|
|
|
GlobalInitWorklist.back().first->setInitializer(C);
|
|
|
|
else
|
|
|
|
return Error("Global variable initializer is not a constant!");
|
|
|
|
}
|
|
|
|
GlobalInitWorklist.pop_back();
|
|
|
|
}
|
|
|
|
|
|
|
|
while (!AliasInitWorklist.empty()) {
|
|
|
|
unsigned ValID = AliasInitWorklist.back().second;
|
|
|
|
if (ValID >= ValueList.size()) {
|
|
|
|
AliasInits.push_back(AliasInitWorklist.back());
|
|
|
|
} else {
|
|
|
|
if (Constant *C = dyn_cast<Constant>(ValueList[ValID]))
|
2007-04-28 14:57:59 +00:00
|
|
|
AliasInitWorklist.back().first->setAliasee(C);
|
2007-04-26 02:46:40 +00:00
|
|
|
else
|
|
|
|
return Error("Alias initializer is not a constant!");
|
|
|
|
}
|
|
|
|
AliasInitWorklist.pop_back();
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-04-24 03:30:34 +00:00
|
|
|
bool BitcodeReader::ParseConstants(BitstreamReader &Stream) {
|
|
|
|
if (Stream.EnterSubBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
|
|
|
|
SmallVector<uint64_t, 64> Record;
|
|
|
|
|
|
|
|
// Read all the records for this value table.
|
|
|
|
const Type *CurTy = Type::Int32Ty;
|
2007-04-24 05:48:56 +00:00
|
|
|
unsigned NextCstNo = ValueList.size();
|
2007-04-24 03:30:34 +00:00
|
|
|
while (1) {
|
|
|
|
unsigned Code = Stream.ReadCode();
|
|
|
|
if (Code == bitc::END_BLOCK) {
|
2007-04-24 05:48:56 +00:00
|
|
|
if (NextCstNo != ValueList.size())
|
|
|
|
return Error("Invalid constant reference!");
|
|
|
|
|
2007-04-24 18:15:21 +00:00
|
|
|
if (Stream.ReadBlockEnd())
|
|
|
|
return Error("Error at end of constants block");
|
|
|
|
return false;
|
2007-04-24 03:30:34 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (Code == bitc::ENTER_SUBBLOCK) {
|
|
|
|
// No known subblocks, always skip them.
|
|
|
|
Stream.ReadSubBlockID();
|
|
|
|
if (Stream.SkipBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (Code == bitc::DEFINE_ABBREV) {
|
|
|
|
Stream.ReadAbbrevRecord();
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Read a record.
|
|
|
|
Record.clear();
|
|
|
|
Value *V = 0;
|
|
|
|
switch (Stream.ReadRecord(Code, Record)) {
|
|
|
|
default: // Default behavior: unknown constant
|
|
|
|
case bitc::CST_CODE_UNDEF: // UNDEF
|
|
|
|
V = UndefValue::get(CurTy);
|
|
|
|
break;
|
|
|
|
case bitc::CST_CODE_SETTYPE: // SETTYPE: [typeid]
|
|
|
|
if (Record.empty())
|
|
|
|
return Error("Malformed CST_SETTYPE record");
|
|
|
|
if (Record[0] >= TypeList.size())
|
|
|
|
return Error("Invalid Type ID in CST_SETTYPE record");
|
|
|
|
CurTy = TypeList[Record[0]];
|
2007-04-24 04:04:35 +00:00
|
|
|
continue; // Skip the ValueList manipulation.
|
2007-04-24 03:30:34 +00:00
|
|
|
case bitc::CST_CODE_NULL: // NULL
|
|
|
|
V = Constant::getNullValue(CurTy);
|
|
|
|
break;
|
|
|
|
case bitc::CST_CODE_INTEGER: // INTEGER: [intval]
|
2007-04-24 04:04:35 +00:00
|
|
|
if (!isa<IntegerType>(CurTy) || Record.empty())
|
|
|
|
return Error("Invalid CST_INTEGER record");
|
|
|
|
V = ConstantInt::get(CurTy, DecodeSignRotatedValue(Record[0]));
|
|
|
|
break;
|
|
|
|
case bitc::CST_CODE_WIDE_INTEGER: {// WIDE_INTEGER: [n, n x intval]
|
|
|
|
if (!isa<IntegerType>(CurTy) || Record.empty() ||
|
|
|
|
Record.size() < Record[0]+1)
|
|
|
|
return Error("Invalid WIDE_INTEGER record");
|
|
|
|
|
|
|
|
unsigned NumWords = Record[0];
|
2007-04-24 17:22:05 +00:00
|
|
|
SmallVector<uint64_t, 8> Words;
|
|
|
|
Words.resize(NumWords);
|
2007-04-24 04:04:35 +00:00
|
|
|
for (unsigned i = 0; i != NumWords; ++i)
|
2007-04-24 17:22:05 +00:00
|
|
|
Words[i] = DecodeSignRotatedValue(Record[i+1]);
|
2007-04-24 04:04:35 +00:00
|
|
|
V = ConstantInt::get(APInt(cast<IntegerType>(CurTy)->getBitWidth(),
|
2007-04-24 17:22:05 +00:00
|
|
|
NumWords, &Words[0]));
|
2007-04-24 04:04:35 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::CST_CODE_FLOAT: // FLOAT: [fpval]
|
|
|
|
if (Record.empty())
|
|
|
|
return Error("Invalid FLOAT record");
|
|
|
|
if (CurTy == Type::FloatTy)
|
|
|
|
V = ConstantFP::get(CurTy, BitsToFloat(Record[0]));
|
|
|
|
else if (CurTy == Type::DoubleTy)
|
|
|
|
V = ConstantFP::get(CurTy, BitsToDouble(Record[0]));
|
2007-04-24 03:30:34 +00:00
|
|
|
else
|
2007-04-24 04:04:35 +00:00
|
|
|
V = UndefValue::get(CurTy);
|
2007-04-24 03:30:34 +00:00
|
|
|
break;
|
2007-04-24 05:48:56 +00:00
|
|
|
|
|
|
|
case bitc::CST_CODE_AGGREGATE: {// AGGREGATE: [n, n x value number]
|
|
|
|
if (Record.empty() || Record.size() < Record[0]+1)
|
|
|
|
return Error("Invalid CST_AGGREGATE record");
|
|
|
|
|
|
|
|
unsigned Size = Record[0];
|
|
|
|
std::vector<Constant*> Elts;
|
|
|
|
|
|
|
|
if (const StructType *STy = dyn_cast<StructType>(CurTy)) {
|
|
|
|
for (unsigned i = 0; i != Size; ++i)
|
|
|
|
Elts.push_back(ValueList.getConstantFwdRef(Record[i+1],
|
|
|
|
STy->getElementType(i)));
|
|
|
|
V = ConstantStruct::get(STy, Elts);
|
|
|
|
} else if (const ArrayType *ATy = dyn_cast<ArrayType>(CurTy)) {
|
|
|
|
const Type *EltTy = ATy->getElementType();
|
|
|
|
for (unsigned i = 0; i != Size; ++i)
|
|
|
|
Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], EltTy));
|
|
|
|
V = ConstantArray::get(ATy, Elts);
|
|
|
|
} else if (const VectorType *VTy = dyn_cast<VectorType>(CurTy)) {
|
|
|
|
const Type *EltTy = VTy->getElementType();
|
|
|
|
for (unsigned i = 0; i != Size; ++i)
|
|
|
|
Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], EltTy));
|
|
|
|
V = ConstantVector::get(Elts);
|
|
|
|
} else {
|
|
|
|
V = UndefValue::get(CurTy);
|
|
|
|
}
|
2007-04-24 07:07:11 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
case bitc::CST_CODE_CE_BINOP: { // CE_BINOP: [opcode, opval, opval]
|
|
|
|
if (Record.size() < 3) return Error("Invalid CE_BINOP record");
|
|
|
|
int Opc = GetDecodedBinaryOpcode(Record[0], CurTy);
|
2007-04-24 18:15:21 +00:00
|
|
|
if (Opc < 0) {
|
|
|
|
V = UndefValue::get(CurTy); // Unknown binop.
|
|
|
|
} else {
|
|
|
|
Constant *LHS = ValueList.getConstantFwdRef(Record[1], CurTy);
|
|
|
|
Constant *RHS = ValueList.getConstantFwdRef(Record[2], CurTy);
|
|
|
|
V = ConstantExpr::get(Opc, LHS, RHS);
|
|
|
|
}
|
2007-04-24 07:07:11 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::CST_CODE_CE_CAST: { // CE_CAST: [opcode, opty, opval]
|
|
|
|
if (Record.size() < 3) return Error("Invalid CE_CAST record");
|
|
|
|
int Opc = GetDecodedCastOpcode(Record[0]);
|
2007-04-24 18:15:21 +00:00
|
|
|
if (Opc < 0) {
|
|
|
|
V = UndefValue::get(CurTy); // Unknown cast.
|
|
|
|
} else {
|
|
|
|
const Type *OpTy = getTypeByID(Record[1]);
|
|
|
|
Constant *Op = ValueList.getConstantFwdRef(Record[2], OpTy);
|
|
|
|
V = ConstantExpr::getCast(Opc, Op, CurTy);
|
|
|
|
}
|
2007-04-24 07:07:11 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::CST_CODE_CE_GEP: { // CE_GEP: [n x operands]
|
|
|
|
if ((Record.size() & 1) == 0) return Error("Invalid CE_GEP record");
|
|
|
|
SmallVector<Constant*, 16> Elts;
|
|
|
|
for (unsigned i = 1, e = Record.size(); i != e; i += 2) {
|
|
|
|
const Type *ElTy = getTypeByID(Record[i]);
|
|
|
|
if (!ElTy) return Error("Invalid CE_GEP record");
|
|
|
|
Elts.push_back(ValueList.getConstantFwdRef(Record[i+1], ElTy));
|
|
|
|
}
|
2007-04-24 18:15:21 +00:00
|
|
|
V = ConstantExpr::getGetElementPtr(Elts[0], &Elts[1], Elts.size()-1);
|
|
|
|
break;
|
2007-04-24 07:07:11 +00:00
|
|
|
}
|
|
|
|
case bitc::CST_CODE_CE_SELECT: // CE_SELECT: [opval#, opval#, opval#]
|
|
|
|
if (Record.size() < 3) return Error("Invalid CE_SELECT record");
|
|
|
|
V = ConstantExpr::getSelect(ValueList.getConstantFwdRef(Record[0],
|
|
|
|
Type::Int1Ty),
|
|
|
|
ValueList.getConstantFwdRef(Record[1],CurTy),
|
|
|
|
ValueList.getConstantFwdRef(Record[2],CurTy));
|
|
|
|
break;
|
|
|
|
case bitc::CST_CODE_CE_EXTRACTELT: { // CE_EXTRACTELT: [opty, opval, opval]
|
|
|
|
if (Record.size() < 3) return Error("Invalid CE_EXTRACTELT record");
|
|
|
|
const VectorType *OpTy =
|
|
|
|
dyn_cast_or_null<VectorType>(getTypeByID(Record[0]));
|
|
|
|
if (OpTy == 0) return Error("Invalid CE_EXTRACTELT record");
|
|
|
|
Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
|
|
|
|
Constant *Op1 = ValueList.getConstantFwdRef(Record[2],
|
|
|
|
OpTy->getElementType());
|
|
|
|
V = ConstantExpr::getExtractElement(Op0, Op1);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::CST_CODE_CE_INSERTELT: { // CE_INSERTELT: [opval, opval, opval]
|
|
|
|
const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
|
|
|
|
if (Record.size() < 3 || OpTy == 0)
|
|
|
|
return Error("Invalid CE_INSERTELT record");
|
|
|
|
Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
|
|
|
|
Constant *Op1 = ValueList.getConstantFwdRef(Record[1],
|
|
|
|
OpTy->getElementType());
|
|
|
|
Constant *Op2 = ValueList.getConstantFwdRef(Record[2], Type::Int32Ty);
|
|
|
|
V = ConstantExpr::getInsertElement(Op0, Op1, Op2);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::CST_CODE_CE_SHUFFLEVEC: { // CE_SHUFFLEVEC: [opval, opval, opval]
|
|
|
|
const VectorType *OpTy = dyn_cast<VectorType>(CurTy);
|
|
|
|
if (Record.size() < 3 || OpTy == 0)
|
|
|
|
return Error("Invalid CE_INSERTELT record");
|
|
|
|
Constant *Op0 = ValueList.getConstantFwdRef(Record[0], OpTy);
|
|
|
|
Constant *Op1 = ValueList.getConstantFwdRef(Record[1], OpTy);
|
|
|
|
const Type *ShufTy=VectorType::get(Type::Int32Ty, OpTy->getNumElements());
|
|
|
|
Constant *Op2 = ValueList.getConstantFwdRef(Record[2], ShufTy);
|
|
|
|
V = ConstantExpr::getShuffleVector(Op0, Op1, Op2);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::CST_CODE_CE_CMP: { // CE_CMP: [opty, opval, opval, pred]
|
|
|
|
if (Record.size() < 4) return Error("Invalid CE_CMP record");
|
|
|
|
const Type *OpTy = getTypeByID(Record[0]);
|
|
|
|
if (OpTy == 0) return Error("Invalid CE_CMP record");
|
|
|
|
Constant *Op0 = ValueList.getConstantFwdRef(Record[1], OpTy);
|
|
|
|
Constant *Op1 = ValueList.getConstantFwdRef(Record[2], OpTy);
|
|
|
|
|
|
|
|
if (OpTy->isFloatingPoint())
|
|
|
|
V = ConstantExpr::getFCmp(Record[3], Op0, Op1);
|
|
|
|
else
|
|
|
|
V = ConstantExpr::getICmp(Record[3], Op0, Op1);
|
|
|
|
break;
|
2007-04-24 05:48:56 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (NextCstNo == ValueList.size())
|
|
|
|
ValueList.push_back(V);
|
|
|
|
else if (ValueList[NextCstNo] == 0)
|
|
|
|
ValueList.initVal(NextCstNo, V);
|
|
|
|
else {
|
|
|
|
// If there was a forward reference to this constant,
|
|
|
|
Value *OldV = ValueList[NextCstNo];
|
|
|
|
ValueList.setOperand(NextCstNo, V);
|
|
|
|
OldV->replaceAllUsesWith(V);
|
|
|
|
delete OldV;
|
2007-04-24 03:30:34 +00:00
|
|
|
}
|
|
|
|
|
2007-04-24 05:48:56 +00:00
|
|
|
++NextCstNo;
|
2007-04-24 03:30:34 +00:00
|
|
|
}
|
|
|
|
}
|
2007-04-22 06:23:29 +00:00
|
|
|
|
|
|
|
bool BitcodeReader::ParseModule(BitstreamReader &Stream,
|
|
|
|
const std::string &ModuleID) {
|
|
|
|
// Reject multiple MODULE_BLOCK's in a single bitstream.
|
|
|
|
if (TheModule)
|
|
|
|
return Error("Multiple MODULE_BLOCKs in same stream");
|
|
|
|
|
|
|
|
if (Stream.EnterSubBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
|
|
|
|
// Otherwise, create the module.
|
|
|
|
TheModule = new Module(ModuleID);
|
|
|
|
|
|
|
|
SmallVector<uint64_t, 64> Record;
|
|
|
|
std::vector<std::string> SectionTable;
|
|
|
|
|
|
|
|
// Read all the records for this module.
|
|
|
|
while (!Stream.AtEndOfStream()) {
|
|
|
|
unsigned Code = Stream.ReadCode();
|
2007-04-24 00:21:45 +00:00
|
|
|
if (Code == bitc::END_BLOCK) {
|
2007-04-26 02:46:40 +00:00
|
|
|
ResolveGlobalAndAliasInits();
|
|
|
|
if (!GlobalInits.empty() || !AliasInits.empty())
|
2007-04-24 00:21:45 +00:00
|
|
|
return Error("Malformed global initializer set");
|
2007-04-24 18:15:21 +00:00
|
|
|
if (Stream.ReadBlockEnd())
|
|
|
|
return Error("Error at end of module block");
|
|
|
|
return false;
|
2007-04-24 00:21:45 +00:00
|
|
|
}
|
2007-04-22 06:23:29 +00:00
|
|
|
|
|
|
|
if (Code == bitc::ENTER_SUBBLOCK) {
|
|
|
|
switch (Stream.ReadSubBlockID()) {
|
|
|
|
default: // Skip unknown content.
|
|
|
|
if (Stream.SkipBlock())
|
|
|
|
return Error("Malformed block record");
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_BLOCK_ID:
|
|
|
|
if (ParseTypeTable(Stream))
|
|
|
|
return true;
|
|
|
|
break;
|
|
|
|
case bitc::TYPE_SYMTAB_BLOCK_ID:
|
|
|
|
if (ParseTypeSymbolTable(Stream))
|
|
|
|
return true;
|
|
|
|
break;
|
2007-04-23 21:26:05 +00:00
|
|
|
case bitc::VALUE_SYMTAB_BLOCK_ID:
|
|
|
|
if (ParseValueSymbolTable(Stream))
|
|
|
|
return true;
|
|
|
|
break;
|
2007-04-24 03:30:34 +00:00
|
|
|
case bitc::CONSTANTS_BLOCK_ID:
|
2007-04-26 02:46:40 +00:00
|
|
|
if (ParseConstants(Stream) || ResolveGlobalAndAliasInits())
|
2007-04-24 03:30:34 +00:00
|
|
|
return true;
|
|
|
|
break;
|
2007-04-22 06:23:29 +00:00
|
|
|
}
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2007-04-23 16:04:05 +00:00
|
|
|
if (Code == bitc::DEFINE_ABBREV) {
|
2007-04-23 18:58:34 +00:00
|
|
|
Stream.ReadAbbrevRecord();
|
|
|
|
continue;
|
2007-04-22 06:23:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Read a record.
|
|
|
|
switch (Stream.ReadRecord(Code, Record)) {
|
|
|
|
default: break; // Default behavior, ignore unknown content.
|
|
|
|
case bitc::MODULE_CODE_VERSION: // VERSION: [version#]
|
|
|
|
if (Record.size() < 1)
|
|
|
|
return Error("Malformed MODULE_CODE_VERSION");
|
|
|
|
// Only version #0 is supported so far.
|
|
|
|
if (Record[0] != 0)
|
|
|
|
return Error("Unknown bitstream version!");
|
|
|
|
break;
|
|
|
|
case bitc::MODULE_CODE_TRIPLE: { // TRIPLE: [strlen, strchr x N]
|
|
|
|
std::string S;
|
|
|
|
if (ConvertToString(Record, 0, S))
|
|
|
|
return Error("Invalid MODULE_CODE_TRIPLE record");
|
|
|
|
TheModule->setTargetTriple(S);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::MODULE_CODE_DATALAYOUT: { // DATALAYOUT: [strlen, strchr x N]
|
|
|
|
std::string S;
|
|
|
|
if (ConvertToString(Record, 0, S))
|
|
|
|
return Error("Invalid MODULE_CODE_DATALAYOUT record");
|
|
|
|
TheModule->setDataLayout(S);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::MODULE_CODE_ASM: { // ASM: [strlen, strchr x N]
|
|
|
|
std::string S;
|
|
|
|
if (ConvertToString(Record, 0, S))
|
|
|
|
return Error("Invalid MODULE_CODE_ASM record");
|
|
|
|
TheModule->setModuleInlineAsm(S);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::MODULE_CODE_DEPLIB: { // DEPLIB: [strlen, strchr x N]
|
|
|
|
std::string S;
|
|
|
|
if (ConvertToString(Record, 0, S))
|
|
|
|
return Error("Invalid MODULE_CODE_DEPLIB record");
|
|
|
|
TheModule->addLibrary(S);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case bitc::MODULE_CODE_SECTIONNAME: { // SECTIONNAME: [strlen, strchr x N]
|
|
|
|
std::string S;
|
|
|
|
if (ConvertToString(Record, 0, S))
|
|
|
|
return Error("Invalid MODULE_CODE_SECTIONNAME record");
|
|
|
|
SectionTable.push_back(S);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
// GLOBALVAR: [type, isconst, initid,
|
|
|
|
// linkage, alignment, section, visibility, threadlocal]
|
|
|
|
case bitc::MODULE_CODE_GLOBALVAR: {
|
2007-04-23 16:04:05 +00:00
|
|
|
if (Record.size() < 6)
|
2007-04-22 06:23:29 +00:00
|
|
|
return Error("Invalid MODULE_CODE_GLOBALVAR record");
|
|
|
|
const Type *Ty = getTypeByID(Record[0]);
|
|
|
|
if (!isa<PointerType>(Ty))
|
|
|
|
return Error("Global not a pointer type!");
|
|
|
|
Ty = cast<PointerType>(Ty)->getElementType();
|
|
|
|
|
|
|
|
bool isConstant = Record[1];
|
|
|
|
GlobalValue::LinkageTypes Linkage = GetDecodedLinkage(Record[3]);
|
|
|
|
unsigned Alignment = (1 << Record[4]) >> 1;
|
|
|
|
std::string Section;
|
|
|
|
if (Record[5]) {
|
|
|
|
if (Record[5]-1 >= SectionTable.size())
|
|
|
|
return Error("Invalid section ID");
|
|
|
|
Section = SectionTable[Record[5]-1];
|
|
|
|
}
|
2007-04-23 16:04:05 +00:00
|
|
|
GlobalValue::VisibilityTypes Visibility = GlobalValue::DefaultVisibility;
|
|
|
|
if (Record.size() >= 6) Visibility = GetDecodedVisibility(Record[6]);
|
|
|
|
bool isThreadLocal = false;
|
|
|
|
if (Record.size() >= 7) isThreadLocal = Record[7];
|
2007-04-22 06:23:29 +00:00
|
|
|
|
|
|
|
GlobalVariable *NewGV =
|
|
|
|
new GlobalVariable(Ty, isConstant, Linkage, 0, "", TheModule);
|
|
|
|
NewGV->setAlignment(Alignment);
|
|
|
|
if (!Section.empty())
|
|
|
|
NewGV->setSection(Section);
|
|
|
|
NewGV->setVisibility(Visibility);
|
|
|
|
NewGV->setThreadLocal(isThreadLocal);
|
|
|
|
|
2007-04-23 21:26:05 +00:00
|
|
|
ValueList.push_back(NewGV);
|
|
|
|
|
2007-04-24 00:18:21 +00:00
|
|
|
// Remember which value to use for the global initializer.
|
|
|
|
if (unsigned InitID = Record[2])
|
|
|
|
GlobalInits.push_back(std::make_pair(NewGV, InitID-1));
|
2007-04-22 06:23:29 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
// FUNCTION: [type, callingconv, isproto, linkage, alignment, section,
|
|
|
|
// visibility]
|
|
|
|
case bitc::MODULE_CODE_FUNCTION: {
|
|
|
|
if (Record.size() < 7)
|
|
|
|
return Error("Invalid MODULE_CODE_FUNCTION record");
|
|
|
|
const Type *Ty = getTypeByID(Record[0]);
|
|
|
|
if (!isa<PointerType>(Ty))
|
|
|
|
return Error("Function not a pointer type!");
|
|
|
|
const FunctionType *FTy =
|
|
|
|
dyn_cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
|
|
|
|
if (!FTy)
|
|
|
|
return Error("Function not a pointer to function type!");
|
|
|
|
|
|
|
|
Function *Func = new Function(FTy, GlobalValue::ExternalLinkage,
|
|
|
|
"", TheModule);
|
|
|
|
|
|
|
|
Func->setCallingConv(Record[1]);
|
|
|
|
Func->setLinkage(GetDecodedLinkage(Record[3]));
|
|
|
|
Func->setAlignment((1 << Record[4]) >> 1);
|
|
|
|
if (Record[5]) {
|
|
|
|
if (Record[5]-1 >= SectionTable.size())
|
|
|
|
return Error("Invalid section ID");
|
|
|
|
Func->setSection(SectionTable[Record[5]-1]);
|
|
|
|
}
|
|
|
|
Func->setVisibility(GetDecodedVisibility(Record[6]));
|
|
|
|
|
2007-04-23 21:26:05 +00:00
|
|
|
ValueList.push_back(Func);
|
2007-04-22 06:23:29 +00:00
|
|
|
break;
|
|
|
|
}
|
2007-04-26 02:46:40 +00:00
|
|
|
// ALIAS: [alias type, aliasee val#, linkage]
|
2007-04-26 03:27:58 +00:00
|
|
|
case bitc::MODULE_CODE_ALIAS: {
|
2007-04-26 02:46:40 +00:00
|
|
|
if (Record.size() < 3)
|
|
|
|
return Error("Invalid MODULE_ALIAS record");
|
|
|
|
const Type *Ty = getTypeByID(Record[0]);
|
|
|
|
if (!isa<PointerType>(Ty))
|
|
|
|
return Error("Function not a pointer type!");
|
|
|
|
|
|
|
|
GlobalAlias *NewGA = new GlobalAlias(Ty, GetDecodedLinkage(Record[2]),
|
|
|
|
"", 0, TheModule);
|
|
|
|
ValueList.push_back(NewGA);
|
|
|
|
AliasInits.push_back(std::make_pair(NewGA, Record[1]));
|
|
|
|
break;
|
2007-04-22 06:23:29 +00:00
|
|
|
}
|
2007-04-26 03:27:58 +00:00
|
|
|
/// MODULE_CODE_PURGEVALS: [numvals]
|
|
|
|
case bitc::MODULE_CODE_PURGEVALS:
|
|
|
|
// Trim down the value list to the specified size.
|
|
|
|
if (Record.size() < 1 || Record[0] > ValueList.size())
|
|
|
|
return Error("Invalid MODULE_PURGEVALS record");
|
|
|
|
ValueList.shrinkTo(Record[0]);
|
|
|
|
break;
|
|
|
|
}
|
2007-04-22 06:23:29 +00:00
|
|
|
Record.clear();
|
|
|
|
}
|
|
|
|
|
|
|
|
return Error("Premature end of bitstream");
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-04-29 07:54:31 +00:00
|
|
|
bool BitcodeReader::ParseBitcode() {
|
2007-04-22 06:23:29 +00:00
|
|
|
TheModule = 0;
|
|
|
|
|
2007-04-29 07:54:31 +00:00
|
|
|
if (Buffer->getBufferSize() & 3)
|
2007-04-22 06:23:29 +00:00
|
|
|
return Error("Bitcode stream should be a multiple of 4 bytes in length");
|
|
|
|
|
2007-04-29 07:54:31 +00:00
|
|
|
unsigned char *BufPtr = (unsigned char *)Buffer->getBufferStart();
|
|
|
|
BitstreamReader Stream(BufPtr, BufPtr+Buffer->getBufferSize());
|
2007-04-22 06:23:29 +00:00
|
|
|
|
|
|
|
// Sniff for the signature.
|
|
|
|
if (Stream.Read(8) != 'B' ||
|
|
|
|
Stream.Read(8) != 'C' ||
|
|
|
|
Stream.Read(4) != 0x0 ||
|
|
|
|
Stream.Read(4) != 0xC ||
|
|
|
|
Stream.Read(4) != 0xE ||
|
|
|
|
Stream.Read(4) != 0xD)
|
|
|
|
return Error("Invalid bitcode signature");
|
|
|
|
|
|
|
|
// We expect a number of well-defined blocks, though we don't necessarily
|
|
|
|
// need to understand them all.
|
|
|
|
while (!Stream.AtEndOfStream()) {
|
|
|
|
unsigned Code = Stream.ReadCode();
|
|
|
|
|
|
|
|
if (Code != bitc::ENTER_SUBBLOCK)
|
|
|
|
return Error("Invalid record at top-level");
|
|
|
|
|
|
|
|
unsigned BlockID = Stream.ReadSubBlockID();
|
|
|
|
|
|
|
|
// We only know the MODULE subblock ID.
|
|
|
|
if (BlockID == bitc::MODULE_BLOCK_ID) {
|
2007-04-29 07:54:31 +00:00
|
|
|
if (ParseModule(Stream, Buffer->getBufferIdentifier()))
|
2007-04-22 06:23:29 +00:00
|
|
|
return true;
|
|
|
|
} else if (Stream.SkipBlock()) {
|
|
|
|
return Error("Malformed block record");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
2007-04-29 07:54:31 +00:00
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// External interface
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
|
|
|
/// getBitcodeModuleProvider - lazy function-at-a-time loading from a file.
|
|
|
|
///
|
|
|
|
ModuleProvider *llvm::getBitcodeModuleProvider(MemoryBuffer *Buffer,
|
|
|
|
std::string *ErrMsg) {
|
|
|
|
BitcodeReader *R = new BitcodeReader(Buffer);
|
|
|
|
if (R->ParseBitcode()) {
|
|
|
|
if (ErrMsg)
|
|
|
|
*ErrMsg = R->getErrorString();
|
|
|
|
|
|
|
|
// Don't let the BitcodeReader dtor delete 'Buffer'.
|
|
|
|
R->releaseMemoryBuffer();
|
|
|
|
delete R;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return R;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// ParseBitcodeFile - Read the specified bitcode file, returning the module.
|
|
|
|
/// If an error occurs, return null and fill in *ErrMsg if non-null.
|
|
|
|
Module *llvm::ParseBitcodeFile(MemoryBuffer *Buffer, std::string *ErrMsg){
|
|
|
|
BitcodeReader *R;
|
|
|
|
R = static_cast<BitcodeReader*>(getBitcodeModuleProvider(Buffer, ErrMsg));
|
|
|
|
if (!R) return 0;
|
|
|
|
|
|
|
|
// Read the whole module, get a pointer to it, tell ModuleProvider not to
|
|
|
|
// delete it when its dtor is run.
|
|
|
|
Module *M = R->releaseModule(ErrMsg);
|
|
|
|
|
|
|
|
// Don't let the BitcodeReader dtor delete 'Buffer'.
|
|
|
|
R->releaseMemoryBuffer();
|
|
|
|
delete R;
|
|
|
|
return M;
|
|
|
|
}
|