///
class ConstantFP : public Constant {
double Val;
- friend struct ConstantCreator<ConstantFP, Type, double>;
+ friend struct ConstantCreator<ConstantFP, Type, uint64_t>;
+ friend struct ConstantCreator<ConstantFP, Type, uint32_t>;
ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
protected:
ConstantFP(const Type *Ty, double V);
inline double getValue() const { return Val; }
/// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue.
- virtual bool isNullValue() const { return Val == 0; }
+ /// getNullValue. Don't depend on == for doubles to tell us it's zero, it
+ /// considers -0.0 to be null as well as 0.0. :(
+ virtual bool isNullValue() const {
+ union {
+ double V;
+ uint64_t I;
+ } T;
+ T.V = Val;
+ return T.I == 0;
+ }
+
+ /// isExactlyValue - We don't rely on operator== working on double values, as
+ /// it returns true for things that are clearly not equal, like -0.0 and 0.0.
+ /// As such, this method can be used to do an exact bit-for-bit comparison of
+ /// two floating point values.
+ bool isExactlyValue(double V) const {
+ union {
+ double V;
+ uint64_t I;
+ } T1;
+ T1.V = Val;
+ union {
+ double V;
+ uint64_t I;
+ } T2;
+ T2.V = V;
+ return T1.I == T2.I;
+ }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantFP *) { return true; }
}
};
+//===---------------------------------------------------------------------------
+/// ConstantAggregateZero - All zero aggregate value
+///
+class ConstantAggregateZero : public Constant {
+ friend struct ConstantCreator<ConstantAggregateZero, Type, char>;
+ ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
+protected:
+ ConstantAggregateZero(const Type *Ty) : Constant(Ty) {}
+public:
+ /// get() - static factory method for creating a null aggregate. It is
+ /// illegal to call this method with a non-aggregate type.
+ static Constant *get(const Type *Ty);
+
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ virtual bool isNullValue() const { return true; }
+
+ virtual void destroyConstant();
+ virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
+ bool DisableChecking = false);
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ ///
+ static inline bool classof(const ConstantAggregateZero *) { return true; }
+ static bool classof(const Constant *CPV);
+ static inline bool classof(const Value *V) {
+ return isa<Constant>(V) && classof(cast<Constant>(V));
+ }
+};
+
//===---------------------------------------------------------------------------
/// ConstantArray - Constant Array Declarations
ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val);
public:
/// get() - Static factory methods - Return objects of the specified value
- static ConstantArray *get(const ArrayType *T, const std::vector<Constant*> &);
- static ConstantArray *get(const std::string &Initializer);
+ static Constant *get(const ArrayType *T, const std::vector<Constant*> &);
+ static Constant *get(const std::string &Initializer);
/// getType - Specialize the getType() method to always return an ArrayType,
/// which reduces the amount of casting needed in parts of the compiler.
///
inline const ArrayType *getType() const {
- return (ArrayType*)Value::getType();
+ return reinterpret_cast<const ArrayType*>(Value::getType());
}
- /// getAsString - If the sub-element type of this array is either sbyte or
- /// ubyte, then this method converts the array to an std::string and returns
- /// it. Otherwise, it asserts out.
+ /// isString - This method returns true if the array is an array of sbyte or
+ /// ubyte, and if the elements of the array are all ConstantInt's.
+ bool isString() const;
+
+ /// getAsString - If this array is isString(), then this method converts the
+ /// array to an std::string and returns it. Otherwise, it asserts out.
///
std::string getAsString() const;
inline const std::vector<Use> &getValues() const { return Operands; }
/// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue.
- virtual bool isNullValue() const {
- // FIXME: This should be made to be MUCH faster. Just check against well
- // known null value!
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
- if (!cast<Constant>(getOperand(i))->isNullValue())
- return false;
- return true;
- }
+ /// getNullValue. This always returns false because zero arrays are always
+ /// created as ConstantAggregateZero objects.
+ virtual bool isNullValue() const { return false; }
virtual void destroyConstant();
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
ConstantStruct(const StructType *T, const std::vector<Constant*> &Val);
public:
/// get() - Static factory methods - Return objects of the specified value
- static ConstantStruct *get(const StructType *T,
- const std::vector<Constant*> &V);
+ static Constant *get(const StructType *T, const std::vector<Constant*> &V);
/// getType() specialization - Reduce amount of casting...
inline const StructType *getType() const {
- return (StructType*)Value::getType();
+ return reinterpret_cast<const StructType*>(Value::getType());
}
/// getValues - Return a vector of the component constants that make up this
inline const std::vector<Use> &getValues() const { return Operands; }
/// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue.
+ /// getNullValue. This always returns false because zero structs are always
+ /// created as ConstantAggregateZero objects.
virtual bool isNullValue() const {
- // FIXME: This should be made to be MUCH faster. Just check against well
- // known null value!
- for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
- if (!cast<Constant>(getOperand(i))->isNullValue())
- return false;
- return true;
+ return false;
}
virtual void destroyConstant();
};
//===---------------------------------------------------------------------------
-/// ConstantPointer - Constant Pointer Declarations
-///
-/// The ConstantPointer class represents a null pointer of a specific type. For
-/// a more specific/useful instance, a subclass of ConstantPointer should be
-/// used.
-///
-class ConstantPointer : public Constant {
- ConstantPointer(const ConstantPointer &); // DO NOT IMPLEMENT
-protected:
- inline ConstantPointer(const PointerType *T) : Constant((const Type*)T) {}
-public:
- inline const PointerType *getType() const {
- return (PointerType*)Value::getType();
- }
-
- /// isNullValue - Return true if this is the value that would be returned by
- /// getNullValue.
- virtual bool isNullValue() const { return false; }
-
- /// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const ConstantPointer *) { return true; }
- static bool classof(const Constant *CPV); // defined in Constants.cpp
- static inline bool classof(const Value *V) {
- return isa<Constant>(V) && classof(cast<Constant>(V));
- }
-};
-
/// ConstantPointerNull - a constant pointer value that points to null
///
-class ConstantPointerNull : public ConstantPointer {
+class ConstantPointerNull : public Constant {
friend struct ConstantCreator<ConstantPointerNull, PointerType, char>;
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
protected:
- ConstantPointerNull(const PointerType *T) : ConstantPointer(T) {}
+ ConstantPointerNull(const PointerType *T)
+ : Constant(reinterpret_cast<const Type*>(T)) {}
public:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantPointerNull *) { return true; }
- static inline bool classof(const ConstantPointer *P) {
- return (P->getNumOperands() == 0 && P->isNullValue());
- }
- static inline bool classof(const Constant *CPV) {
- return isa<ConstantPointer>(CPV) && classof(cast<ConstantPointer>(CPV));
- }
+ static bool classof(const Constant *CPV);
static inline bool classof(const Value *V) {
- return isa<ConstantPointer>(V) && classof(cast<ConstantPointer>(V));
+ return isa<Constant>(V) && classof(cast<Constant>(V));
}
};
+//===---------------------------------------------------------------------------
/// ConstantPointerRef - a constant pointer value that is initialized to
/// point to a global value, which lies at a constant, fixed address.
///
-class ConstantPointerRef : public ConstantPointer {
+class ConstantPointerRef : public Constant {
friend class Module; // Modules maintain these references
ConstantPointerRef(const ConstantPointerRef &); // DNI!
return cast<GlobalValue>(Operands[0].get());
}
+ /// isNullValue - Return true if this is the value that would be returned by
+ /// getNullValue.
+ virtual bool isNullValue() const { return false; }
+
virtual void destroyConstant();
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
bool DisableChecking = false);
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantPointerRef *) { return true; }
- static inline bool classof(const ConstantPointer *CPV) {
- // check for a single operand (the target value)
- return (CPV->getNumOperands() == 1);
- }
- static inline bool classof(const Constant *CPV) {
- return isa<ConstantPointer>(CPV) && classof(cast<ConstantPointer>(CPV));
- }
+ static bool classof(const Constant *CPV);
static inline bool classof(const Value *V) {
- return isa<ConstantPointer>(V) && classof(cast<ConstantPointer>(V));
+ return isa<Constant>(V) && classof(cast<Constant>(V));
}
};
ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty);
// Binary/Shift instruction creation ctor
ConstantExpr(unsigned Opcode, Constant *C1, Constant *C2);
+ // Select instruction creation ctor
+ ConstantExpr(Constant *C, Constant *V1, Constant *V2);
// GEP instruction creation ctor
ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
const Type *DestTy);
Constant *C1, Constant *C2);
static Constant *getShiftTy(const Type *Ty,
unsigned Opcode, Constant *C1, Constant *C2);
+ static Constant *getSelectTy(const Type *Ty,
+ Constant *C1, Constant *C2, Constant *C3);
static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
const std::vector<Constant*> &IdxList);
///
static Constant *getCast(Constant *C, const Type *Ty);
- /// Binary constant expr - Use with binary operators...
+ /// Select constant expr
///
- static Constant *get(unsigned Opcode, Constant *C1, Constant *C2) {
- return getTy(C1->getType(), Opcode, C1, C2);
+ static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) {
+ return getSelectTy(V1->getType(), C, V1, V2);
}
- /// getShift - Return a shift left or shift right constant expr
+
+ /// ConstantExpr::get - Return a binary or shift operator constant expression,
+ /// folding if possible.
///
- static Constant *getShift(unsigned Opcode, Constant *C1, Constant *C2) {
- return getShiftTy(C1->getType(), Opcode, C1, C2);
+ static Constant *get(unsigned Opcode, Constant *C1, Constant *C2) {
+ return getTy(C1->getType(), Opcode, C1, C2);
}
/// Getelementptr form...
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