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in a module or method local pool, they are global to the llvm system. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@419 91177308-0d34-0410-b5e6-96231b3b80d8
199 lines
6.7 KiB
C++
199 lines
6.7 KiB
C++
//===-- llvm/ConstPoolVals.h - Constant Value nodes --------------*- C++ -*--=//
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//
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// This file contains the declarations for the ConstPoolVal class and all of
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// its subclasses, which represent the different type of constant pool values
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CONSTPOOLVALS_H
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#define LLVM_CONSTPOOLVALS_H
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#include "llvm/User.h"
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#include "llvm/Support/DataTypes.h"
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#include <vector>
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class ArrayType;
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class StructType;
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//===----------------------------------------------------------------------===//
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// ConstPoolVal Class
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//===----------------------------------------------------------------------===//
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class ConstPoolVal : public User {
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protected:
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inline ConstPoolVal(const Type *Ty) : User(Ty, Value::ConstantVal) {}
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public:
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// Specialize setName to handle symbol table majik...
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virtual void setName(const string &name, SymbolTable *ST = 0);
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virtual string getStrValue() const = 0;
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// Static constructor to get a '0' constant of arbitrary type...
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static ConstPoolVal *getNullConstant(const Type *Ty);
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};
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//===----------------------------------------------------------------------===//
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// Classes to represent constant pool variable defs
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//===----------------------------------------------------------------------===//
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//===---------------------------------------------------------------------------
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// ConstPoolBool - Boolean Values
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//
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class ConstPoolBool : public ConstPoolVal {
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bool Val;
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ConstPoolBool(const ConstPoolBool &); // DO NOT IMPLEMENT
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ConstPoolBool(bool V);
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public:
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static ConstPoolBool *True, *False; // The True & False values
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// Factory objects - Return objects of the specified value
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static ConstPoolBool *get(bool Value) { return Value ? True : False; }
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static ConstPoolBool *get(const Type *Ty, bool Value) { return get(Value); }
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// inverted - Return the opposite value of the current value.
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inline ConstPoolBool *inverted() const { return (this==True) ? False : True; }
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virtual string getStrValue() const;
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inline bool getValue() const { return Val; }
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};
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//===---------------------------------------------------------------------------
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// ConstPoolInt - Superclass of ConstPoolSInt & ConstPoolUInt, to make dealing
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// with integral constants easier.
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//
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class ConstPoolInt : public ConstPoolVal {
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protected:
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union {
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int64_t Signed;
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uint64_t Unsigned;
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} Val;
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ConstPoolInt(const ConstPoolInt &); // DO NOT IMPLEMENT
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ConstPoolInt(const Type *Ty, uint64_t V);
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public:
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// equalsInt - Provide a helper method that can be used to determine if the
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// constant contained within is equal to a constant. This only works for very
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// small values, because this is all that can be represented with all types.
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//
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bool equalsInt(unsigned char V) const {
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assert(V <= 127 &&
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"equals: Can only be used with very small positive constants!");
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return Val.Unsigned == V;
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}
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// ConstPoolInt::get static method: return a constant pool int with the
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// specified value. as above, we work only with very small values here.
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//
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static ConstPoolInt *get(const Type *Ty, unsigned char V);
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};
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//===---------------------------------------------------------------------------
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// ConstPoolSInt - Signed Integer Values [sbyte, short, int, long]
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//
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class ConstPoolSInt : public ConstPoolInt {
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ConstPoolSInt(const ConstPoolSInt &); // DO NOT IMPLEMENT
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protected:
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ConstPoolSInt(const Type *Ty, int64_t V);
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public:
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static ConstPoolSInt *get(const Type *Ty, int64_t V);
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virtual string getStrValue() const;
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static bool isValueValidForType(const Type *Ty, int64_t V);
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inline int64_t getValue() const { return Val.Signed; }
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};
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//===---------------------------------------------------------------------------
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// ConstPoolUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong]
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//
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class ConstPoolUInt : public ConstPoolInt {
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ConstPoolUInt(const ConstPoolUInt &); // DO NOT IMPLEMENT
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protected:
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ConstPoolUInt(const Type *Ty, uint64_t V);
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public:
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static ConstPoolUInt *get(const Type *Ty, uint64_t V);
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virtual string getStrValue() const;
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static bool isValueValidForType(const Type *Ty, uint64_t V);
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inline uint64_t getValue() const { return Val.Unsigned; }
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};
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//===---------------------------------------------------------------------------
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// ConstPoolFP - Floating Point Values [float, double]
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//
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class ConstPoolFP : public ConstPoolVal {
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double Val;
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ConstPoolFP(const ConstPoolFP &); // DO NOT IMPLEMENT
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protected:
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ConstPoolFP(const Type *Ty, double V);
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public:
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static ConstPoolFP *get(const Type *Ty, double V);
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virtual string getStrValue() const;
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static bool isValueValidForType(const Type *Ty, double V);
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inline double getValue() const { return Val; }
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};
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//===---------------------------------------------------------------------------
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// ConstPoolArray - Constant Array Declarations
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//
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class ConstPoolArray : public ConstPoolVal {
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ConstPoolArray(const ConstPoolArray &); // DO NOT IMPLEMENT
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protected:
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ConstPoolArray(const ArrayType *T, const vector<ConstPoolVal*> &Val);
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public:
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static ConstPoolArray *get(const ArrayType *T, const vector<ConstPoolVal*> &);
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virtual string getStrValue() const;
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inline const vector<Use> &getValues() const { return Operands; }
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};
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//===---------------------------------------------------------------------------
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// ConstPoolStruct - Constant Struct Declarations
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//
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class ConstPoolStruct : public ConstPoolVal {
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ConstPoolStruct(const ConstPoolStruct &); // DO NOT IMPLEMENT
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protected:
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ConstPoolStruct(const StructType *T, const vector<ConstPoolVal*> &Val);
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public:
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static ConstPoolStruct *get(const StructType *T,
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const vector<ConstPoolVal*> &V);
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virtual string getStrValue() const;
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inline const vector<Use> &getValues() const { return Operands; }
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};
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//===---------------------------------------------------------------------------
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// External functions
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//
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// Convenience functions to get the value of an integer constant, for an
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// appropriate integer or non-integer type that can be held in an integer.
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// The type of the argument must be the following:
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// GetSignedIntConstantValue: signed integer or bool
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// GetUnsignedIntConstantValue: unsigned integer, bool, or pointer
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// GetConstantValueAsSignedInt: any of the above, but the value
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// must fit into a int64_t.
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//
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// isValidConstant is set to true if a valid constant was found.
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//
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int64_t GetSignedIntConstantValue (const Value* val, bool& isValidConst);
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uint64_t GetUnsignedIntConstantValue (const Value* val, bool& isValidConst);
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int64_t GetConstantValueAsSignedInt (const Value* val, bool& isValidConst);
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//===---------------------------------------------------------------------------
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#endif
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