PointerUnion() {}
PointerUnion(PT1 V) {
- Val.setPointer(PointerLikeTypeTraits<PT1>::getAsVoidPointer(V));
+ Val.setPointer(
+ const_cast<void *>(PointerLikeTypeTraits<PT1>::getAsVoidPointer(V)));
Val.setInt(0);
}
PointerUnion(PT2 V) {
- Val.setPointer(PointerLikeTypeTraits<PT2>::getAsVoidPointer(V));
+ Val.setPointer(
+ const_cast<void *>(PointerLikeTypeTraits<PT2>::getAsVoidPointer(V)));
Val.setInt(1);
}
- /// isNull - Return true if the pointer help in the union is null,
+ /// isNull - Return true if the pointer held in the union is null,
/// regardless of which type it is.
bool isNull() const { return Val.getPointer() == 0; }
operator bool() const { return !isNull(); }
int is() const {
int TyNo = ::llvm::getPointerUnionTypeNum<PT1, PT2>((T*)0);
assert(TyNo != -1 && "Type query could never succeed on PointerUnion!");
- return Val.getInt() == TyNo;
+ return static_cast<int>(Val.getInt()) == TyNo;
}
/// get<T>() - Return the value of the specified pointer type. If the
/// Assignment operators - Allow assigning into this union from either
/// pointer type, setting the discriminator to remember what it came from.
const PointerUnion &operator=(const PT1 &RHS) {
- Val.setPointer(PointerLikeTypeTraits<PT1>::getAsVoidPointer(RHS));
+ Val.setPointer(
+ const_cast<void *>(PointerLikeTypeTraits<PT1>::getAsVoidPointer(RHS)));
Val.setInt(0);
return *this;
}
const PointerUnion &operator=(const PT2 &RHS) {
- Val.setPointer(PointerLikeTypeTraits<PT2>::getAsVoidPointer(RHS));
+ Val.setPointer(
+ const_cast<void *>(PointerLikeTypeTraits<PT2>::getAsVoidPointer(RHS)));
Val.setInt(1);
return *this;
}
void *getOpaqueValue() const { return Val.getOpaqueValue(); }
- static PointerUnion getFromOpaqueValue(void *VP) {
+ static inline PointerUnion getFromOpaqueValue(void *VP) {
PointerUnion V;
V.Val = ValTy::getFromOpaqueValue(VP);
return V;
Val = V;
}
- /// isNull - Return true if the pointer help in the union is null,
+ /// isNull - Return true if the pointer held in the union is null,
/// regardless of which type it is.
bool isNull() const { return Val.isNull(); }
operator bool() const { return !isNull(); }
int is() const {
// Is it PT1/PT2?
if (::llvm::getPointerUnionTypeNum<PT1, PT2>((T*)0) != -1)
- return Val.get<InnerUnion>().is<T>();
- // Must be PT3 or statically invalid.
- assert(Val.is<T>());
- return true;
+ return Val.template is<InnerUnion>() &&
+ Val.template get<InnerUnion>().template is<T>();
+ return Val.template is<T>();
}
/// get<T>() - Return the value of the specified pointer type. If the
template<typename T>
T get() const {
assert(is<T>() && "Invalid accessor called");
- if (Val.is<T>())
- return Val.get<T>();
- return Val.get<InnerUnion>().get<T>();
+ // Is it PT1/PT2?
+ if (::llvm::getPointerUnionTypeNum<PT1, PT2>((T*)0) != -1)
+ return Val.template get<InnerUnion>().template get<T>();
+
+ return Val.template get<T>();
}
/// dyn_cast<T>() - If the current value is of the specified pointer type,
}
void *getOpaqueValue() const { return Val.getOpaqueValue(); }
- static PointerUnion3 getFromOpaqueValue(void *VP) {
+ static inline PointerUnion3 getFromOpaqueValue(void *VP) {
PointerUnion3 V;
V.Val = ValTy::getFromOpaqueValue(VP);
return V;
::NumLowBitsAvailable
};
};
+
+ /// PointerUnion4 - This is a pointer union of four pointer types. See
+ /// documentation for PointerUnion for usage.
+ template <typename PT1, typename PT2, typename PT3, typename PT4>
+ class PointerUnion4 {
+ public:
+ typedef PointerUnion<PT1, PT2> InnerUnion1;
+ typedef PointerUnion<PT3, PT4> InnerUnion2;
+ typedef PointerUnion<InnerUnion1, InnerUnion2> ValTy;
+ private:
+ ValTy Val;
+ public:
+ PointerUnion4() {}
+
+ PointerUnion4(PT1 V) {
+ Val = InnerUnion1(V);
+ }
+ PointerUnion4(PT2 V) {
+ Val = InnerUnion1(V);
+ }
+ PointerUnion4(PT3 V) {
+ Val = InnerUnion2(V);
+ }
+ PointerUnion4(PT4 V) {
+ Val = InnerUnion2(V);
+ }
+
+ /// isNull - Return true if the pointer held in the union is null,
+ /// regardless of which type it is.
+ bool isNull() const { return Val.isNull(); }
+ operator bool() const { return !isNull(); }
+
+ /// is<T>() return true if the Union currently holds the type matching T.
+ template<typename T>
+ int is() const {
+ // Is it PT1/PT2?
+ if (::llvm::getPointerUnionTypeNum<PT1, PT2>((T*)0) != -1)
+ return Val.template is<InnerUnion1>() &&
+ Val.template get<InnerUnion1>().template is<T>();
+ return Val.template is<InnerUnion2>() &&
+ Val.template get<InnerUnion2>().template is<T>();
+ }
+
+ /// get<T>() - Return the value of the specified pointer type. If the
+ /// specified pointer type is incorrect, assert.
+ template<typename T>
+ T get() const {
+ assert(is<T>() && "Invalid accessor called");
+ // Is it PT1/PT2?
+ if (::llvm::getPointerUnionTypeNum<PT1, PT2>((T*)0) != -1)
+ return Val.template get<InnerUnion1>().template get<T>();
+
+ return Val.template get<InnerUnion2>().template get<T>();
+ }
+
+ /// dyn_cast<T>() - If the current value is of the specified pointer type,
+ /// return it, otherwise return null.
+ template<typename T>
+ T dyn_cast() const {
+ if (is<T>()) return get<T>();
+ return T();
+ }
+
+ /// Assignment operators - Allow assigning into this union from either
+ /// pointer type, setting the discriminator to remember what it came from.
+ const PointerUnion4 &operator=(const PT1 &RHS) {
+ Val = InnerUnion1(RHS);
+ return *this;
+ }
+ const PointerUnion4 &operator=(const PT2 &RHS) {
+ Val = InnerUnion1(RHS);
+ return *this;
+ }
+ const PointerUnion4 &operator=(const PT3 &RHS) {
+ Val = InnerUnion2(RHS);
+ return *this;
+ }
+ const PointerUnion4 &operator=(const PT4 &RHS) {
+ Val = InnerUnion2(RHS);
+ return *this;
+ }
+
+ void *getOpaqueValue() const { return Val.getOpaqueValue(); }
+ static inline PointerUnion4 getFromOpaqueValue(void *VP) {
+ PointerUnion4 V;
+ V.Val = ValTy::getFromOpaqueValue(VP);
+ return V;
+ }
+ };
+
+ // Teach SmallPtrSet that PointerUnion4 is "basically a pointer", that has
+ // # low bits available = min(PT1bits,PT2bits,PT2bits)-2.
+ template<typename PT1, typename PT2, typename PT3, typename PT4>
+ class PointerLikeTypeTraits<PointerUnion4<PT1, PT2, PT3, PT4> > {
+ public:
+ static inline void *
+ getAsVoidPointer(const PointerUnion4<PT1, PT2, PT3, PT4> &P) {
+ return P.getOpaqueValue();
+ }
+ static inline PointerUnion4<PT1, PT2, PT3, PT4>
+ getFromVoidPointer(void *P) {
+ return PointerUnion4<PT1, PT2, PT3, PT4>::getFromOpaqueValue(P);
+ }
+
+ // The number of bits available are the min of the two pointer types.
+ enum {
+ NumLowBitsAvailable =
+ PointerLikeTypeTraits<typename PointerUnion4<PT1, PT2, PT3, PT4>::ValTy>
+ ::NumLowBitsAvailable
+ };
+ };
}
#endif