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//=== BasicValueFactory.h - Basic values for Path Sens analysis --*- C++ -*---//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines BasicValueFactory, a class that manages the lifetime
// of APSInt objects and symbolic constraints used by GRExprEngine
// and related classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_BASICVALUEFACTORY_H
#define LLVM_CLANG_ANALYSIS_BASICVALUEFACTORY_H
#include "clang/Analysis/PathSensitive/SymbolManager.h"
#include "clang/Analysis/PathSensitive/SVals.h"
#include "clang/AST/ASTContext.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/ImmutableList.h"
namespace clang {
class CompoundValData : public llvm::FoldingSetNode {
QualType T;
llvm::ImmutableList<SVal> L;
public:
CompoundValData(QualType t, llvm::ImmutableList<SVal> l)
: T(t), L(l) {}
typedef llvm::ImmutableList<SVal>::iterator iterator;
iterator begin() const { return L.begin(); }
iterator end() const { return L.end(); }
static void Profile(llvm::FoldingSetNodeID& ID, QualType T,
llvm::ImmutableList<SVal> L);
void Profile(llvm::FoldingSetNodeID& ID) { Profile(ID, T, L); }
};
class BasicValueFactory {
typedef llvm::FoldingSet<llvm::FoldingSetNodeWrapper<llvm::APSInt> >
APSIntSetTy;
ASTContext& Ctx;
llvm::BumpPtrAllocator& BPAlloc;
APSIntSetTy APSIntSet;
void* PersistentSVals;
void* PersistentSValPairs;
llvm::ImmutableList<SVal>::Factory SValListFactory;
llvm::FoldingSet<CompoundValData> CompoundValDataSet;
public:
BasicValueFactory(ASTContext& ctx, llvm::BumpPtrAllocator& Alloc)
: Ctx(ctx), BPAlloc(Alloc), PersistentSVals(0), PersistentSValPairs(0),
SValListFactory(Alloc) {}
~BasicValueFactory();
ASTContext& getContext() const { return Ctx; }
const llvm::APSInt& getValue(const llvm::APSInt& X);
const llvm::APSInt& getValue(const llvm::APInt& X, bool isUnsigned);
const llvm::APSInt& getValue(uint64_t X, unsigned BitWidth, bool isUnsigned);
const llvm::APSInt& getValue(uint64_t X, QualType T);
/// Convert - Create a new persistent APSInt with the same value as 'From'
/// but with the bitwidth and signedness of 'To'.
const llvm::APSInt& Convert(const llvm::APSInt& To,
const llvm::APSInt& From) {
if (To.isUnsigned() == From.isUnsigned() &&
To.getBitWidth() == From.getBitWidth())
return From;
return getValue(From.getSExtValue(),
To.getBitWidth(),
To.isUnsigned());
}
const llvm::APSInt& getIntValue(uint64_t X, bool isUnsigned) {
QualType T = isUnsigned ? Ctx.UnsignedIntTy : Ctx.IntTy;
return getValue(X, T);
}
inline const llvm::APSInt& getMaxValue(const llvm::APSInt &v) {
return getValue(llvm::APSInt::getMaxValue(v.getBitWidth(), v.isUnsigned()));
}
inline const llvm::APSInt& getMinValue(const llvm::APSInt &v) {
return getValue(llvm::APSInt::getMinValue(v.getBitWidth(), v.isUnsigned()));
}
inline const llvm::APSInt& getMaxValue(QualType T) {
assert(T->isIntegerType() || Loc::IsLocType(T));
bool isUnsigned = T->isUnsignedIntegerType() || Loc::IsLocType(T);
return getValue(llvm::APSInt::getMaxValue(Ctx.getTypeSize(T), isUnsigned));
}
inline const llvm::APSInt& getMinValue(QualType T) {
assert(T->isIntegerType() || Loc::IsLocType(T));
bool isUnsigned = T->isUnsignedIntegerType() || Loc::IsLocType(T);
return getValue(llvm::APSInt::getMinValue(Ctx.getTypeSize(T), isUnsigned));
}
inline const llvm::APSInt& Add1(const llvm::APSInt& V) {
llvm::APSInt X = V;
++X;
return getValue(X);
}
inline const llvm::APSInt& Sub1(const llvm::APSInt& V) {
llvm::APSInt X = V;
--X;
return getValue(X);
}
inline const llvm::APSInt& getZeroWithPtrWidth(bool isUnsigned = true) {
return getValue(0, Ctx.getTypeSize(Ctx.VoidPtrTy), isUnsigned);
}
inline const llvm::APSInt& getTruthValue(bool b, QualType T) {
return getValue(b ? 1 : 0, Ctx.getTypeSize(T), false);
}
inline const llvm::APSInt& getTruthValue(bool b) {
return getTruthValue(b, Ctx.IntTy);
}
const CompoundValData* getCompoundValData(QualType T,
llvm::ImmutableList<SVal> Vals);
llvm::ImmutableList<SVal> getEmptySValList() {
return SValListFactory.GetEmptyList();
}
llvm::ImmutableList<SVal> consVals(SVal X, llvm::ImmutableList<SVal> L) {
return SValListFactory.Add(X, L);
}
const llvm::APSInt* EvaluateAPSInt(BinaryOperator::Opcode Op,
const llvm::APSInt& V1,
const llvm::APSInt& V2);
const std::pair<SVal, uintptr_t>&
getPersistentSValWithData(const SVal& V, uintptr_t Data);
const std::pair<SVal, SVal>&
getPersistentSValPair(const SVal& V1, const SVal& V2);
const SVal* getPersistentSVal(SVal X);
};
} // end clang namespace
#endif
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