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Added RValue class "UninitializedValue". 

llvm-svn: 46471
This commit is contained in:
Ted Kremenek 2008-01-28 22:51:57 +00:00
parent fe9cf4f38b
commit 64d9524dcb
1 changed files with 27 additions and 8 deletions
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35
clang/Analysis/GRConstants.cpp
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@ -203,8 +203,8 @@ namespace {
class VISIBILITY_HIDDEN RValue {
public:
enum BaseKind { InvalidKind=0x0, LValueKind=0x1, NonLValueKind=0x2,
BaseFlags = 0x3 };
enum BaseKind { LValueKind=0x0, NonLValueKind=0x1,
UninitializedKind=0x2, InvalidKind=0x3, BaseFlags = 0x3 };
private:
void* Data;
@ -215,8 +215,8 @@ protected:
: Data(const_cast<void*>(d)),
Kind((isLValue ? LValueKind : NonLValueKind) | (ValKind << 2)) {}
explicit RValue()
: Data(0), Kind(InvalidKind) {}
explicit RValue(BaseKind k)
: Data(0), Kind(k) {}
void* getRawPtr() const {
return reinterpret_cast<void*>(Data);
@ -252,12 +252,21 @@ public:
class VISIBILITY_HIDDEN InvalidValue : public RValue {
public:
InvalidValue() {}
InvalidValue() : RValue(InvalidKind) {}
static inline bool classof(const RValue* V) {
return V->getBaseKind() == InvalidKind;
}
};
class VISIBILITY_HIDDEN UninitializedValue : public RValue {
public:
UninitializedValue() : RValue(UninitializedKind) {}
static inline bool classof(const RValue* V) {
return V->getBaseKind() == UninitializedKind;
}
};
class VISIBILITY_HIDDEN LValue : public RValue {
protected:
@ -289,7 +298,7 @@ public:
// Implement isa<T> support.
static inline bool classof(const RValue* V) {
return V->getBaseKind() == NonLValueKind;
return V->getBaseKind() >= NonLValueKind;
}
};
@ -425,6 +434,9 @@ case (k1##Kind*NumNonLValueKind+k2##Kind):\
switch (getSubKind()*NumNonLValueKind+RHS.getSubKind()){\
RVALUE_DISPATCH_CASE(ConcreteInt,ConcreteInt,Op)\
default:\
if (getBaseKind() == UninitializedKind ||\
RHS.getBaseKind() == UninitializedKind)\
return cast<NonLValue>(UninitializedValue());\
assert (!isValid() || !RHS.isValid() && "Missing case.");\
break;\
}\
@ -485,6 +497,10 @@ void RValue::print(std::ostream& Out) const {
assert (false && "FIXME: LValue printing not implemented.");
break;
case UninitializedKind:
Out << "Uninitialized";
break;
default:
assert (false && "Invalid RValue.");
}
@ -866,8 +882,11 @@ void GRConstants::VisitDeclStmt(DeclStmt* DS, GRConstants::NodeTy* Pred,
StateTy St = Pred->getState();
for (const ScopedDecl* D = DS->getDecl(); D; D = D->getNextDeclarator())
if (const VarDecl* VD = dyn_cast<VarDecl>(D))
St = SetValue(St, LValueDecl(VD), GetValue(St, VD->getInit()));
if (const VarDecl* VD = dyn_cast<VarDecl>(D)) {
const Expr* E = VD->getInit();
St = SetValue(St, LValueDecl(VD),
E ? GetValue(St, E) : UninitializedValue());
}
Nodify(Dst, DS, Pred, St);