+
+//===----------------------------------------------------------------------===//
+/// ConstantDataSequential - A vector or array constant whose element type is a
+/// simple 1/2/4/8-byte integer or float/double, and whose elements are just
+/// simple data values (i.e. ConstantInt/ConstantFP). This Constant node has no
+/// operands because it stores all of the elements of the constant as densely
+/// packed data, instead of as Value*'s.
+///
+/// This is the common base class of ConstantDataArray and ConstantDataVector.
+///
+class ConstantDataSequential : public Constant {
+ friend class LLVMContextImpl;
+ /// DataElements - A pointer to the bytes underlying this constant (which is
+ /// owned by the uniquing StringMap).
+ const char *DataElements;
+
+ /// Next - This forms a link list of ConstantDataSequential nodes that have
+ /// the same value but different type. For example, 0,0,0,1 could be a 4
+ /// element array of i8, or a 1-element array of i32. They'll both end up in
+ /// the same StringMap bucket, linked up.
+ ConstantDataSequential *Next;
+ void *operator new(size_t, unsigned) LLVM_DELETED_FUNCTION;
+ ConstantDataSequential(const ConstantDataSequential &) LLVM_DELETED_FUNCTION;
+protected:
+ explicit ConstantDataSequential(Type *ty, ValueTy VT, const char *Data)
+ : Constant(ty, VT, 0, 0), DataElements(Data), Next(0) {}
+ ~ConstantDataSequential() { delete Next; }
+
+ static Constant *getImpl(StringRef Bytes, Type *Ty);
+
+protected:
+ // allocate space for exactly zero operands.
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
+public:
+
+ /// isElementTypeCompatible - Return true if a ConstantDataSequential can be
+ /// formed with a vector or array of the specified element type.
+ /// ConstantDataArray only works with normal float and int types that are
+ /// stored densely in memory, not with things like i42 or x86_f80.
+ static bool isElementTypeCompatible(const Type *Ty);
+
+ /// getElementAsInteger - If this is a sequential container of integers (of
+ /// any size), return the specified element in the low bits of a uint64_t.
+ uint64_t getElementAsInteger(unsigned i) const;
+
+ /// getElementAsAPFloat - If this is a sequential container of floating point
+ /// type, return the specified element as an APFloat.
+ APFloat getElementAsAPFloat(unsigned i) const;
+
+ /// getElementAsFloat - If this is an sequential container of floats, return
+ /// the specified element as a float.
+ float getElementAsFloat(unsigned i) const;
+
+ /// getElementAsDouble - If this is an sequential container of doubles, return
+ /// the specified element as a double.
+ double getElementAsDouble(unsigned i) const;
+
+ /// getElementAsConstant - Return a Constant for a specified index's element.
+ /// Note that this has to compute a new constant to return, so it isn't as
+ /// efficient as getElementAsInteger/Float/Double.
+ Constant *getElementAsConstant(unsigned i) const;
+
+ /// getType - Specialize the getType() method to always return a
+ /// SequentialType, which reduces the amount of casting needed in parts of the
+ /// compiler.
+ inline SequentialType *getType() const {
+ return reinterpret_cast<SequentialType*>(Value::getType());
+ }
+
+ /// getElementType - Return the element type of the array/vector.
+ Type *getElementType() const;
+
+ /// getNumElements - Return the number of elements in the array or vector.
+ unsigned getNumElements() const;
+
+ /// getElementByteSize - Return the size (in bytes) of each element in the
+ /// array/vector. The size of the elements is known to be a multiple of one
+ /// byte.
+ uint64_t getElementByteSize() const;
+
+
+ /// isString - This method returns true if this is an array of i8.
+ bool isString() const;
+
+ /// isCString - This method returns true if the array "isString", ends with a
+ /// nul byte, and does not contains any other nul bytes.
+ bool isCString() const;
+
+ /// getAsString - If this array is isString(), then this method returns the
+ /// array as a StringRef. Otherwise, it asserts out.
+ ///
+ StringRef getAsString() const {
+ assert(isString() && "Not a string");
+ return getRawDataValues();
+ }
+
+ /// getAsCString - If this array is isCString(), then this method returns the
+ /// array (without the trailing null byte) as a StringRef. Otherwise, it
+ /// asserts out.
+ ///
+ StringRef getAsCString() const {
+ assert(isCString() && "Isn't a C string");
+ StringRef Str = getAsString();
+ return Str.substr(0, Str.size()-1);
+ }
+
+ /// getRawDataValues - Return the raw, underlying, bytes of this data. Note
+ /// that this is an extremely tricky thing to work with, as it exposes the
+ /// host endianness of the data elements.
+ StringRef getRawDataValues() const;
+
+ virtual void destroyConstant();
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ ///
+ static bool classof(const ConstantDataSequential *) { return true; }
+ static bool classof(const Value *V) {
+ return V->getValueID() == ConstantDataArrayVal ||
+ V->getValueID() == ConstantDataVectorVal;
+ }
+private:
+ const char *getElementPointer(unsigned Elt) const;
+};
+
+//===----------------------------------------------------------------------===//
+/// ConstantDataArray - An array constant whose element type is a simple
+/// 1/2/4/8-byte integer or float/double, and whose elements are just simple
+/// data values (i.e. ConstantInt/ConstantFP). This Constant node has no
+/// operands because it stores all of the elements of the constant as densely
+/// packed data, instead of as Value*'s.
+class ConstantDataArray : public ConstantDataSequential {
+ void *operator new(size_t, unsigned) LLVM_DELETED_FUNCTION;
+ ConstantDataArray(const ConstantDataArray &) LLVM_DELETED_FUNCTION;
+ virtual void anchor();
+ friend class ConstantDataSequential;
+ explicit ConstantDataArray(Type *ty, const char *Data)
+ : ConstantDataSequential(ty, ConstantDataArrayVal, Data) {}
+protected:
+ // allocate space for exactly zero operands.
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
+public:
+
+ /// get() constructors - Return a constant with array type with an element
+ /// count and element type matching the ArrayRef passed in. Note that this
+ /// can return a ConstantAggregateZero object.
+ static Constant *get(LLVMContext &Context, ArrayRef<uint8_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<uint16_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<uint32_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<uint64_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<float> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<double> Elts);
+
+ /// getString - This method constructs a CDS and initializes it with a text
+ /// string. The default behavior (AddNull==true) causes a null terminator to
+ /// be placed at the end of the array (increasing the length of the string by
+ /// one more than the StringRef would normally indicate. Pass AddNull=false
+ /// to disable this behavior.
+ static Constant *getString(LLVMContext &Context, StringRef Initializer,
+ bool AddNull = true);
+
+ /// getType - Specialize the getType() method to always return an ArrayType,
+ /// which reduces the amount of casting needed in parts of the compiler.
+ ///
+ inline ArrayType *getType() const {
+ return reinterpret_cast<ArrayType*>(Value::getType());
+ }
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ ///
+ static bool classof(const ConstantDataArray *) { return true; }
+ static bool classof(const Value *V) {
+ return V->getValueID() == ConstantDataArrayVal;
+ }
+};
+
+//===----------------------------------------------------------------------===//
+/// ConstantDataVector - A vector constant whose element type is a simple
+/// 1/2/4/8-byte integer or float/double, and whose elements are just simple
+/// data values (i.e. ConstantInt/ConstantFP). This Constant node has no
+/// operands because it stores all of the elements of the constant as densely
+/// packed data, instead of as Value*'s.
+class ConstantDataVector : public ConstantDataSequential {
+ void *operator new(size_t, unsigned) LLVM_DELETED_FUNCTION;
+ ConstantDataVector(const ConstantDataVector &) LLVM_DELETED_FUNCTION;
+ virtual void anchor();
+ friend class ConstantDataSequential;
+ explicit ConstantDataVector(Type *ty, const char *Data)
+ : ConstantDataSequential(ty, ConstantDataVectorVal, Data) {}
+protected:
+ // allocate space for exactly zero operands.
+ void *operator new(size_t s) {
+ return User::operator new(s, 0);
+ }
+public:
+
+ /// get() constructors - Return a constant with vector type with an element
+ /// count and element type matching the ArrayRef passed in. Note that this
+ /// can return a ConstantAggregateZero object.
+ static Constant *get(LLVMContext &Context, ArrayRef<uint8_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<uint16_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<uint32_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<uint64_t> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<float> Elts);
+ static Constant *get(LLVMContext &Context, ArrayRef<double> Elts);
+
+ /// getSplat - Return a ConstantVector with the specified constant in each
+ /// element. The specified constant has to be a of a compatible type (i8/i16/
+ /// i32/i64/float/double) and must be a ConstantFP or ConstantInt.
+ static Constant *getSplat(unsigned NumElts, Constant *Elt);
+
+ /// getSplatValue - If this is a splat constant, meaning that all of the
+ /// elements have the same value, return that value. Otherwise return NULL.
+ Constant *getSplatValue() const;
+
+ /// getType - Specialize the getType() method to always return a VectorType,
+ /// which reduces the amount of casting needed in parts of the compiler.
+ ///
+ inline VectorType *getType() const {
+ return reinterpret_cast<VectorType*>(Value::getType());
+ }
+
+ /// Methods for support type inquiry through isa, cast, and dyn_cast:
+ ///
+ static bool classof(const ConstantDataVector *) { return true; }
+ static bool classof(const Value *V) {
+ return V->getValueID() == ConstantDataVectorVal;
+ }
+};
+
+