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//==- Serialize.h - Generic Object Serialization to Bitcode -------*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Ted Kremenek and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the interface for generic object serialization to
// LLVM bitcode.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BITCODE_SERIALIZE_OUTPUT
#define LLVM_BITCODE_SERIALIZE_OUTPUT
#include "llvm/Bitcode/Serialization.h"
#include "llvm/Bitcode/BitstreamWriter.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/DenseMap.h"
namespace llvm {
class Serializer {
BitstreamWriter& Stream;
SmallVector<uint64_t,10> Record;
unsigned BlockLevel;
typedef DenseMap<const void*,unsigned> MapTy;
MapTy PtrMap;
public:
Serializer(BitstreamWriter& stream);
~Serializer();
template <typename T>
inline void Emit(const T& X) { SerializeTrait<T>::Emit(*this,X); }
void EmitInt(uint64_t X);
void EmitSInt(int64_t X);
void EmitBool(bool X) { EmitInt(X); }
void EmitCStr(const char* beg, const char* end);
void EmitCStr(const char* cstr);
void EmitPtr(const void* ptr) { EmitInt(getPtrId(ptr)); }
SerializedPtrID EmitPtr(const void* ptr,bool) {
SerializedPtrID ptr_id = getPtrId(ptr);
EmitInt(ptr_id);
return ptr_id;
}
SerializedPtrID EmitDiffPtrID(const void* ptr, SerializedPtrID PrevID) {
assert (!isRegistered(ptr));
SerializedPtrID ptr_id = getPtrId(ptr);
if (ptr_id == 0)
EmitBool(false);
else {
assert (ptr_id > PrevID);
assert (PrevID == 0 || ptr_id - PrevID == 1);
EmitBool(true);
}
return ptr_id;
}
template <typename T>
void EmitRef(const T& ref) { EmitPtr(&ref); }
template <typename T>
void EmitOwnedPtr(T* ptr) {
EmitPtr(ptr);
if (ptr) SerializeTrait<T>::Emit(*this,*ptr);
}
template <typename T1, typename T2>
void BatchEmitOwnedPtrs(T1* p1, T2* p2) {
// Optimization: Only emit the differences between the IDs. Most of
// the time this difference will be "1", thus resulting in fewer bits.
assert (!isRegistered(p1));
assert (!isRegistered(p2));
EmitDiffPtrID(p2,EmitPtr(p1,true));
if (p1) SerializeTrait<T1>::Emit(*this,*p1);
if (p2) SerializeTrait<T2>::Emit(*this,*p2);
}
template <typename T1, typename T2, typename T3>
void BatchEmitOwnedPtrs(T1* p1, T2* p2, T3* p3) {
EmitDiffPtrID(p3,EmitDiffPtrID(p2,EmitPtr(p1)));
if (p1) SerializeTrait<T1>::Emit(*this,*p1);
if (p2) SerializeTrait<T2>::Emit(*this,*p2);
if (p3) SerializeTrait<T3>::Emit(*this,*p3);
}
template <typename T1, typename T2, typename T3, typename T4>
void BatchEmitOwnedPtrs(T1* p1, T2* p2, T3* p3, T4& p4) {
EmitDiffPtrID(p4,EmitDiffPtrID(p3,EmitDiffPtrID(p2,EmitPtr(p1))));
if (p1) SerializeTrait<T1>::Emit(*this,*p1);
if (p2) SerializeTrait<T2>::Emit(*this,*p2);
if (p3) SerializeTrait<T3>::Emit(*this,*p3);
if (p4) SerializeTrait<T4>::Emit(*this,*p4);
}
template <typename T>
void BatchEmitOwnedPtrs(unsigned NumPtrs, T* const * Ptrs) {
SerializedPtrID ID;
for (unsigned i = 0; i < NumPtrs; ++i) {
if (i == 0) ID = EmitPtr(Ptrs[i],true);
else ID = EmitDiffPtrID(Ptrs[i],ID);
}
for (unsigned i = 0; i < NumPtrs; ++i)
if (Ptrs[i]) SerializeTrait<T>::Emit(*this,*Ptrs[i]);
}
template <typename T1, typename T2>
void BatchEmitOwnedPtrs(unsigned NumT1Ptrs, T1* const * Ptrs, T2* p2) {
SerializedPtrID ID = EmitPtr(p2,true);
for (unsigned i = 0; i < NumT1Ptrs; ++i)
ID = EmitDiffPtrID(Ptrs[i],ID);
if (p2) SerializeTrait<T2>::Emit(*this,*p2);
for (unsigned i = 0; i < NumT1Ptrs; ++i)
if (Ptrs[i]) SerializeTrait<T1>::Emit(*this,*Ptrs[i]);
}
template <typename T1, typename T2, typename T3>
void BatchEmitOwnedPtrs(unsigned NumT1Ptrs, T1* const * Ptrs,
T2* p2, T3* p3) {
SerializedPtrID TempID = EmitDiffPtrID(p3,EmitPtr(p2,true));
for (unsigned i = 0; i < NumT1Ptrs; ++i)
TempID = EmitDiffPtrID(Ptrs[i],TempID);
if (p2) SerializeTrait<T2>::Emit(*this,*p2);
if (p3) SerializeTrait<T3>::Emit(*this,*p3);
for (unsigned i = 0; i < NumT1Ptrs; ++i)
if (Ptrs[i]) SerializeTrait<T1>::Emit(*this,*Ptrs[i]);
}
bool isRegistered(const void* p) const;
void FlushRecord() { if (inRecord()) EmitRecord(); }
void EnterBlock(unsigned BlockID = 8, unsigned CodeLen = 3);
void ExitBlock();
private:
void EmitRecord();
inline bool inRecord() { return Record.size() > 0; }
SerializedPtrID getPtrId(const void* ptr);
};
} // end namespace llvm
#endif
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