Add support for turning an array of characters into a string.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3509 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-08-26 17:53:56 +00:00
parent e0b6b78e09
commit 93aeea3748
2 changed files with 146 additions and 96 deletions

View File

@ -17,42 +17,42 @@ class PointerType;
//===---------------------------------------------------------------------------
// ConstantIntegral - Shared superclass of boolean and integer constants.
//
// This class just defines some common interfaces to be implemented.
//
/// ConstantIntegral - Shared superclass of boolean and integer constants.
///
/// This class just defines some common interfaces to be implemented.
///
class ConstantIntegral : public Constant {
protected:
ConstantIntegral(const Type *Ty) : Constant(Ty) {}
public:
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
//
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
///
virtual bool isNullValue() const = 0;
// isMaxValue - Return true if this is the largest value that may be
// represented by this type.
//
/// isMaxValue - Return true if this is the largest value that may be
/// represented by this type.
///
virtual bool isMaxValue() const = 0;
// isMinValue - Return true if this is the smallest value that may be
// represented by this type.
//
/// isMinValue - Return true if this is the smallest value that may be
/// represented by this type.
///
virtual bool isMinValue() const = 0;
// isAllOnesValue - Return true if every bit in this constant is set to true.
//
/// isAllOnesValue - Return true if every bit in this constant is set to true.
///
virtual bool isAllOnesValue() const = 0;
// Static constructor to get the maximum/minimum/allones constant of specified
// (integral) type...
//
/// Static constructor to get the maximum/minimum/allones constant of
/// specified (integral) type...
///
static ConstantIntegral *getMaxValue(const Type *Ty);
static ConstantIntegral *getMinValue(const Type *Ty);
static ConstantIntegral *getAllOnesValue(const Type *Ty);
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantIntegral *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
@ -62,8 +62,8 @@ public:
//===---------------------------------------------------------------------------
// ConstantBool - Boolean Values
//
/// ConstantBool - Boolean Values
///
class ConstantBool : public ConstantIntegral {
bool Val;
ConstantBool(bool V);
@ -71,24 +71,26 @@ class ConstantBool : public ConstantIntegral {
public:
static ConstantBool *True, *False; // The True & False values
// Factory objects - Return objects of the specified value
/// get() - Static factory methods - Return objects of the specified value
static ConstantBool *get(bool Value) { return Value ? True : False; }
static ConstantBool *get(const Type *Ty, bool Value) { return get(Value); }
// inverted - Return the opposite value of the current value.
/// inverted - Return the opposite value of the current value.
inline ConstantBool *inverted() const { return (this==True) ? False : True; }
/// getValue - return the boolean value of this constant.
///
inline bool getValue() const { return Val; }
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
//
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
///
virtual bool isNullValue() const { return this == False; }
virtual bool isMaxValue() const { return this == True; }
virtual bool isMinValue() const { return this == False; }
virtual bool isAllOnesValue() const { return this == True; }
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantBool *) { return true; }
static bool classof(const Constant *CPV) {
return (CPV == True) | (CPV == False);
@ -100,9 +102,9 @@ public:
//===---------------------------------------------------------------------------
// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing
// with integral constants easier.
//
/// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing
/// with integral constants easier.
///
class ConstantInt : public ConstantIntegral {
protected:
union {
@ -113,29 +115,30 @@ protected:
ConstantInt(const Type *Ty, uint64_t V);
~ConstantInt() {}
public:
// equalsInt - Provide a helper method that can be used to determine if the
// constant contained within is equal to a constant. This only works for very
// small values, because this is all that can be represented with all types.
//
/// equalsInt - Provide a helper method that can be used to determine if the
/// constant contained within is equal to a constant. This only works for
/// very small values, because this is all that can be represented with all
/// types.
///
bool equalsInt(unsigned char V) const {
assert(V <= 127 &&
"equals: Can only be used with very small positive constants!");
return Val.Unsigned == V;
}
// ConstantInt::get static method: return a constant pool int with the
// specified value. as above, we work only with very small values here.
//
/// ConstantInt::get static method: return a ConstantInt with the specified
/// value. as above, we work only with very small values here.
///
static ConstantInt *get(const Type *Ty, unsigned char V);
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return Val.Unsigned == 0; }
virtual bool isAllOnesValue() const { return Val.Signed == -1; }
virtual bool isMaxValue() const = 0;
virtual bool isMinValue() const = 0;
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantInt *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
@ -145,22 +148,26 @@ public:
//===---------------------------------------------------------------------------
// ConstantSInt - Signed Integer Values [sbyte, short, int, long]
//
/// ConstantSInt - Signed Integer Values [sbyte, short, int, long]
///
class ConstantSInt : public ConstantInt {
ConstantSInt(const ConstantSInt &); // DO NOT IMPLEMENT
protected:
ConstantSInt(const Type *Ty, int64_t V);
~ConstantSInt() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantSInt *get(const Type *Ty, int64_t V);
/// isValueValidForType - return true if Ty is big enough to represent V.
static bool isValueValidForType(const Type *Ty, int64_t V);
/// getValue - return the underlying value of this constant.
inline int64_t getValue() const { return Val.Signed; }
// isMaxValue - Return true if this is the largest value that may be
// represented by this type.
//
/// isMaxValue - Return true if this is the largest value that may be
/// represented by this type.
///
virtual bool isMaxValue() const {
int64_t V = getValue();
if (V < 0) return false; // Be careful about wrap-around on 'long's
@ -168,9 +175,9 @@ public:
return !isValueValidForType(getType(), V) || V < 0;
}
// isMinValue - Return true if this is the smallest value that may be
// represented by this type.
//
/// isMinValue - Return true if this is the smallest value that may be
/// represented by this type.
///
virtual bool isMinValue() const {
int64_t V = getValue();
if (V > 0) return false; // Be careful about wrap-around on 'long's
@ -178,7 +185,7 @@ public:
return !isValueValidForType(getType(), V) || V > 0;
}
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantSInt *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
@ -187,26 +194,30 @@ public:
};
//===---------------------------------------------------------------------------
// ConstantUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong]
//
/// ConstantUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong]
///
class ConstantUInt : public ConstantInt {
ConstantUInt(const ConstantUInt &); // DO NOT IMPLEMENT
protected:
ConstantUInt(const Type *Ty, uint64_t V);
~ConstantUInt() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantUInt *get(const Type *Ty, uint64_t V);
/// isValueValidForType - return true if Ty is big enough to represent V.
static bool isValueValidForType(const Type *Ty, uint64_t V);
/// getValue - return the underlying value of this constant.
inline uint64_t getValue() const { return Val.Unsigned; }
// isMaxValue - Return true if this is the largest value that may be
// represented by this type.
//
/// isMaxValue - Return true if this is the largest value that may be
/// represented by this type.
///
virtual bool isMaxValue() const { return isAllOnesValue(); }
virtual bool isMinValue() const { return getValue() == 0; }
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantUInt *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
@ -216,8 +227,8 @@ public:
//===---------------------------------------------------------------------------
// ConstantFP - Floating Point Values [float, double]
//
/// ConstantFP - Floating Point Values [float, double]
///
class ConstantFP : public Constant {
double Val;
ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
@ -225,16 +236,18 @@ protected:
ConstantFP(const Type *Ty, double V);
~ConstantFP() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantFP *get(const Type *Ty, double V);
/// isValueValidForType - return true if Ty is big enough to represent V.
static bool isValueValidForType(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.
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return Val == 0; }
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantFP *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
@ -244,8 +257,8 @@ public:
//===---------------------------------------------------------------------------
// ConstantArray - Constant Array Declarations
//
/// ConstantArray - Constant Array Declarations
///
class ConstantArray : public Constant {
ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT
protected:
@ -253,22 +266,34 @@ protected:
~ConstantArray() {}
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);
/// 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();
}
/// 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.
///
std::string getAsString() const;
/// getValues - Return a vector of the component constants that make up this
/// array.
inline const std::vector<Use> &getValues() const { return Operands; }
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return false; }
virtual void destroyConstant();
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantArray *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
@ -287,22 +312,26 @@ protected:
~ConstantStruct() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantStruct *get(const StructType *T,
const std::vector<Constant*> &V);
/// getType() specialization - Reduce amount of casting...
inline const StructType *getType() const {
return (StructType*)Value::getType();
}
/// getValues - Return a vector of the component constants that make up this
/// structure.
inline const std::vector<Use> &getValues() const { return Operands; }
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return false; }
virtual void destroyConstant();
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantStruct *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp
static inline bool classof(const Value *V) {
@ -311,12 +340,12 @@ public:
};
//===---------------------------------------------------------------------------
// 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.
//
/// 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:
@ -327,11 +356,11 @@ public:
return (PointerType*)Value::getType();
}
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
/// 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:
/// 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) {
@ -339,8 +368,8 @@ public:
}
};
// ConstantPointerNull - a constant pointer value that points to null
//
/// ConstantPointerNull - a constant pointer value that points to null
///
class ConstantPointerNull : public ConstantPointer {
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
protected:
@ -348,15 +377,16 @@ protected:
inline ~ConstantPointerNull() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantPointerNull *get(const PointerType *T);
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return true; }
virtual void destroyConstant();
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// 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());
@ -370,9 +400,9 @@ public:
};
// ConstantPointerRef - a constant pointer value that is initialized to
// point to a global value, which lies at a constant, fixed address.
//
/// 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 {
friend class Module; // Modules maintain these references
ConstantPointerRef(const ConstantPointerRef &); // DNI!
@ -381,18 +411,20 @@ protected:
ConstantPointerRef(GlobalValue *GV);
~ConstantPointerRef() {}
public:
/// get() - Static factory methods - Return objects of the specified value
static ConstantPointerRef *get(GlobalValue *GV);
const GlobalValue *getValue() const {
return cast<GlobalValue>(Operands[0].get());
}
GlobalValue *getValue() {
return cast<GlobalValue>(Operands[0].get());
}
virtual void destroyConstant();
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// 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)
@ -433,32 +465,32 @@ protected:
public:
// Static methods to construct a ConstantExpr of different kinds.
// Cast constant expr
/// Cast constant expr
static ConstantExpr *getCast(Constant *C, const Type *Ty);
// Binary constant expr - Use with binary operators...
/// Binary constant expr - Use with binary operators...
static ConstantExpr *get(unsigned Opcode, Constant *C1, Constant *C2);
// Getelementptr form...
/// Getelementptr form...
static ConstantExpr *getGetElementPtr(Constant *C,
const std::vector<Constant*> &IdxList);
// isNullValue - Return true if this is the value that would be returned by
// getNullValue.
/// isNullValue - Return true if this is the value that would be returned by
/// getNullValue.
virtual bool isNullValue() const { return false; }
// getOpcode - Return the opcode at the root of this constant expression
/// getOpcode - Return the opcode at the root of this constant expression
unsigned getOpcode() const { return iType; }
// getOpcodeName - Return a string representation for an opcode.
/// getOpcodeName - Return a string representation for an opcode.
const char *getOpcodeName() const;
// isConstantExpr - Return true if this is a ConstantExpr
/// isConstantExpr - Return true if this is a ConstantExpr
virtual bool isConstantExpr() const { return true; }
virtual void destroyConstant();
// Methods for support type inquiry through isa, cast, and dyn_cast:
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantExpr *) { return true; }
static inline bool classof(const Constant *CPV) {
return CPV->isConstantExpr();

View File

@ -422,6 +422,24 @@ void ConstantArray::destroyConstant() {
destroyConstantImpl();
}
// 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.
//
std::string ConstantArray::getAsString() const {
std::string Result;
if (getType()->getElementType() == Type::SByteTy)
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
Result += (char)cast<ConstantSInt>(getOperand(i))->getValue();
else {
assert(getType()->getElementType() == Type::UByteTy && "Not a string!");
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
Result += (char)cast<ConstantUInt>(getOperand(i))->getValue();
}
return Result;
}
//---- ConstantStruct::get() implementation...
//
static ValueMap<std::vector<Constant*>, ConstantStruct> StructConstants;