mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-19 19:30:10 +00:00
40bbeb5d07
initializers for constant structs and arrays take constant space, instead of space proportinal to the number of elements. This reduces the memory usage of the LLVM compiler by hundreds of megabytes when compiling some nasty SPEC95 benchmarks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11470 91177308-0d34-0410-b5e6-96231b3b80d8
595 lines
22 KiB
C++
595 lines
22 KiB
C++
//===-- llvm/Constants.h - Constant class subclass definitions --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declarations for the subclasses of Constant, which
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// represent the different type of constant pool values
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CONSTANTS_H
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#define LLVM_CONSTANTS_H
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#include "llvm/Constant.h"
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#include "Support/DataTypes.h"
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namespace llvm {
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class ArrayType;
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class StructType;
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class PointerType;
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template<class ConstantClass, class TypeClass, class ValType>
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struct ConstantCreator;
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template<class ConstantClass, class TypeClass>
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struct ConvertConstantType;
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//===---------------------------------------------------------------------------
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/// ConstantIntegral - Shared superclass of boolean and integer constants.
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///
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/// This class just defines some common interfaces to be implemented.
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///
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class ConstantIntegral : public Constant {
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protected:
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ConstantIntegral(const Type *Ty) : Constant(Ty) {}
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public:
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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///
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virtual bool isNullValue() const = 0;
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/// isMaxValue - Return true if this is the largest value that may be
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/// represented by this type.
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///
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virtual bool isMaxValue() const = 0;
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/// isMinValue - Return true if this is the smallest value that may be
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/// represented by this type.
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///
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virtual bool isMinValue() const = 0;
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/// isAllOnesValue - Return true if every bit in this constant is set to true.
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///
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virtual bool isAllOnesValue() const = 0;
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/// Static constructor to get the maximum/minimum/allones constant of
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/// specified (integral) type...
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///
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static ConstantIntegral *getMaxValue(const Type *Ty);
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static ConstantIntegral *getMinValue(const Type *Ty);
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static ConstantIntegral *getAllOnesValue(const Type *Ty);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantIntegral *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantBool - Boolean Values
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///
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class ConstantBool : public ConstantIntegral {
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bool Val;
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ConstantBool(bool V);
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public:
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static ConstantBool *True, *False; // The True & False values
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantBool *get(bool Value) { return Value ? True : False; }
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static ConstantBool *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 ConstantBool *inverted() const { return (this==True) ? False : True; }
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/// getValue - return the boolean value of this constant.
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///
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inline bool getValue() const { return Val; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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///
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virtual bool isNullValue() const { return this == False; }
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virtual bool isMaxValue() const { return this == True; }
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virtual bool isMinValue() const { return this == False; }
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virtual bool isAllOnesValue() const { return this == True; }
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantBool *) { return true; }
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static bool classof(const Constant *CPV) {
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return (CPV == True) | (CPV == False);
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}
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantInt - Superclass of ConstantSInt & ConstantUInt, to make dealing
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/// with integral constants easier.
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///
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class ConstantInt : public ConstantIntegral {
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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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ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
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ConstantInt(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
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/// very small values, because this is all that can be represented with all
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/// 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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/// ConstantInt::get static method: return a ConstantInt with the specified
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/// value. as above, we work only with very small values here.
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///
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static ConstantInt *get(const Type *Ty, unsigned char V);
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/// getRawValue - return the underlying value of this constant as a 64-bit
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/// unsigned integer value.
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///
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inline uint64_t getRawValue() const { return Val.Unsigned; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return Val.Unsigned == 0; }
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virtual bool isMaxValue() const = 0;
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virtual bool isMinValue() const = 0;
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantInt *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantSInt - Signed Integer Values [sbyte, short, int, long]
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///
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class ConstantSInt : public ConstantInt {
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ConstantSInt(const ConstantSInt &); // DO NOT IMPLEMENT
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friend struct ConstantCreator<ConstantSInt, Type, int64_t>;
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protected:
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ConstantSInt(const Type *Ty, int64_t V);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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///
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static ConstantSInt *get(const Type *Ty, int64_t V);
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/// isValueValidForType - return true if Ty is big enough to represent V.
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///
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static bool isValueValidForType(const Type *Ty, int64_t V);
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/// getValue - return the underlying value of this constant.
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///
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inline int64_t getValue() const { return Val.Signed; }
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virtual bool isAllOnesValue() const { return getValue() == -1; }
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/// isMaxValue - Return true if this is the largest value that may be
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/// represented by this type.
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///
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virtual bool isMaxValue() const {
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int64_t V = getValue();
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if (V < 0) return false; // Be careful about wrap-around on 'long's
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++V;
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return !isValueValidForType(getType(), V) || V < 0;
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}
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/// isMinValue - Return true if this is the smallest value that may be
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/// represented by this type.
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///
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virtual bool isMinValue() const {
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int64_t V = getValue();
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if (V > 0) return false; // Be careful about wrap-around on 'long's
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--V;
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return !isValueValidForType(getType(), V) || V > 0;
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}
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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///
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static inline bool classof(const ConstantSInt *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantUInt - Unsigned Integer Values [ubyte, ushort, uint, ulong]
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///
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class ConstantUInt : public ConstantInt {
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ConstantUInt(const ConstantUInt &); // DO NOT IMPLEMENT
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friend struct ConstantCreator<ConstantUInt, Type, uint64_t>;
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protected:
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ConstantUInt(const Type *Ty, uint64_t V);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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///
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static ConstantUInt *get(const Type *Ty, uint64_t V);
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/// isValueValidForType - return true if Ty is big enough to represent V.
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///
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static bool isValueValidForType(const Type *Ty, uint64_t V);
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/// getValue - return the underlying value of this constant.
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///
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inline uint64_t getValue() const { return Val.Unsigned; }
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/// isMaxValue - Return true if this is the largest value that may be
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/// represented by this type.
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///
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virtual bool isAllOnesValue() const;
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virtual bool isMaxValue() const { return isAllOnesValue(); }
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virtual bool isMinValue() const { return getValue() == 0; }
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantUInt *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantFP - Floating Point Values [float, double]
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///
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class ConstantFP : public Constant {
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double Val;
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friend struct ConstantCreator<ConstantFP, Type, uint64_t>;
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friend struct ConstantCreator<ConstantFP, Type, uint32_t>;
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ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
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protected:
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ConstantFP(const Type *Ty, double V);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantFP *get(const Type *Ty, double V);
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/// isValueValidForType - return true if Ty is big enough to represent V.
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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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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue. Don't depend on == for doubles to tell us it's zero, it
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/// considers -0.0 to be null as well as 0.0. :(
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virtual bool isNullValue() const {
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union {
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double V;
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uint64_t I;
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} T;
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T.V = Val;
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return T.I == 0;
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}
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/// isExactlyValue - We don't rely on operator== working on double values, as
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/// it returns true for things that are clearly not equal, like -0.0 and 0.0.
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/// As such, this method can be used to do an exact bit-for-bit comparison of
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/// two floating point values.
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bool isExactlyValue(double V) const {
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union {
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double V;
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uint64_t I;
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} T1;
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T1.V = Val;
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union {
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double V;
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uint64_t I;
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} T2;
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T2.V = V;
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return T1.I == T2.I;
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}
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantFP *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantAggregateZero - All zero aggregate value
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///
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class ConstantAggregateZero : public Constant {
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friend struct ConstantCreator<ConstantAggregateZero, Type, char>;
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ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
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protected:
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ConstantAggregateZero(const Type *Ty) : Constant(Ty) {}
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public:
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/// get() - static factory method for creating a null aggregate. It is
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/// illegal to call this method with a non-aggregate type.
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static Constant *get(const Type *Ty);
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return true; }
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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///
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static inline bool classof(const ConstantAggregateZero *) { return true; }
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static bool classof(const Constant *CPV);
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantArray - Constant Array Declarations
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///
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class ConstantArray : public Constant {
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friend struct ConstantCreator<ConstantArray, ArrayType,
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std::vector<Constant*> >;
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ConstantArray(const ConstantArray &); // DO NOT IMPLEMENT
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protected:
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ConstantArray(const ArrayType *T, const std::vector<Constant*> &Val);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static Constant *get(const ArrayType *T, const std::vector<Constant*> &);
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static Constant *get(const std::string &Initializer);
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/// getType - Specialize the getType() method to always return an ArrayType,
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/// which reduces the amount of casting needed in parts of the compiler.
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///
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inline const ArrayType *getType() const {
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return reinterpret_cast<const ArrayType*>(Value::getType());
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}
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/// isString - This method returns true if the array is an array of sbyte or
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/// ubyte, and if the elements of the array are all ConstantInt's.
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bool isString() const;
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/// getAsString - If this array is isString(), then this method converts the
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/// array to an std::string and returns it. Otherwise, it asserts out.
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///
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std::string getAsString() const;
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/// getValues - Return a vector of the component constants that make up this
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/// array.
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inline const std::vector<Use> &getValues() const { return Operands; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue. This always returns false because zero arrays are always
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/// created as ConstantAggregateZero objects.
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virtual bool isNullValue() const { return false; }
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantArray *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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// ConstantStruct - Constant Struct Declarations
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//
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class ConstantStruct : public Constant {
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friend struct ConstantCreator<ConstantStruct, StructType,
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std::vector<Constant*> >;
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ConstantStruct(const ConstantStruct &); // DO NOT IMPLEMENT
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protected:
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ConstantStruct(const StructType *T, const std::vector<Constant*> &Val);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static Constant *get(const StructType *T, const std::vector<Constant*> &V);
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/// getType() specialization - Reduce amount of casting...
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inline const StructType *getType() const {
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return reinterpret_cast<const StructType*>(Value::getType());
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}
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/// getValues - Return a vector of the component constants that make up this
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/// structure.
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inline const std::vector<Use> &getValues() const { return Operands; }
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue. This always returns false because zero structs are always
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/// created as ConstantAggregateZero objects.
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virtual bool isNullValue() const {
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return false;
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}
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantStruct *) { return true; }
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static bool classof(const Constant *CPV); // defined in Constants.cpp
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantPointerNull - a constant pointer value that points to null
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///
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class ConstantPointerNull : public Constant {
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friend struct ConstantCreator<ConstantPointerNull, PointerType, char>;
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ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
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protected:
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ConstantPointerNull(const PointerType *T)
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: Constant(reinterpret_cast<const Type*>(T)) {}
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantPointerNull *get(const PointerType *T);
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return true; }
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virtual void destroyConstant();
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantPointerNull *) { return true; }
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static bool classof(const Constant *CPV);
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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//===---------------------------------------------------------------------------
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/// ConstantPointerRef - a constant pointer value that is initialized to
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/// point to a global value, which lies at a constant, fixed address.
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///
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class ConstantPointerRef : public Constant {
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friend class Module; // Modules maintain these references
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ConstantPointerRef(const ConstantPointerRef &); // DNI!
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protected:
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ConstantPointerRef(GlobalValue *GV);
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public:
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/// get() - Static factory methods - Return objects of the specified value
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static ConstantPointerRef *get(GlobalValue *GV);
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const GlobalValue *getValue() const {
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return cast<GlobalValue>(Operands[0].get());
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}
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GlobalValue *getValue() {
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return cast<GlobalValue>(Operands[0].get());
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}
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/// isNullValue - Return true if this is the value that would be returned by
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/// getNullValue.
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virtual bool isNullValue() const { return false; }
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virtual void destroyConstant();
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virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
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bool DisableChecking = false);
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ConstantPointerRef *) { return true; }
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static bool classof(const Constant *CPV);
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static inline bool classof(const Value *V) {
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return isa<Constant>(V) && classof(cast<Constant>(V));
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}
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};
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// ConstantExpr - a constant value that is initialized with an expression using
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// other constant values. This is only used to represent values that cannot be
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// evaluated at compile-time (e.g., something derived from an address) because
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// it does not have a mechanism to store the actual value. Use the appropriate
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// Constant subclass above for known constants.
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//
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class ConstantExpr : public Constant {
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unsigned iType; // Operation type (an Instruction opcode)
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friend struct ConstantCreator<ConstantExpr,Type,
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std::pair<unsigned, std::vector<Constant*> > >;
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friend struct ConvertConstantType<ConstantExpr, Type>;
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|
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protected:
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// Cast creation ctor
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|
ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty);
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// Binary/Shift instruction creation ctor
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|
ConstantExpr(unsigned Opcode, Constant *C1, Constant *C2);
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// GEP instruction creation ctor
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|
ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
|
|
const Type *DestTy);
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|
|
|
// These private methods are used by the type resolution code to create
|
|
// ConstantExprs in intermediate forms.
|
|
static Constant *getTy(const Type *Ty, unsigned Opcode,
|
|
Constant *C1, Constant *C2);
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|
static Constant *getShiftTy(const Type *Ty,
|
|
unsigned Opcode, Constant *C1, Constant *C2);
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|
static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
|
|
const std::vector<Constant*> &IdxList);
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|
|
|
public:
|
|
// Static methods to construct a ConstantExpr of different kinds. Note that
|
|
// these methods may return a object that is not an instance of the
|
|
// ConstantExpr class, because they will attempt to fold the constant
|
|
// expression into something simpler if possible.
|
|
|
|
/// Cast constant expr
|
|
///
|
|
static Constant *getCast(Constant *C, const Type *Ty);
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|
|
|
/// ConstantExpr::get - Return a binary or shift operator constant expression,
|
|
/// folding if possible.
|
|
///
|
|
static Constant *get(unsigned Opcode, Constant *C1, Constant *C2) {
|
|
return getTy(C1->getType(), Opcode, C1, C2);
|
|
}
|
|
|
|
/// Getelementptr form...
|
|
///
|
|
static Constant *getGetElementPtr(Constant *C,
|
|
const std::vector<Constant*> &IdxList);
|
|
|
|
/// 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
|
|
unsigned getOpcode() const { return iType; }
|
|
|
|
/// getOpcodeName - Return a string representation for an opcode.
|
|
const char *getOpcodeName() const;
|
|
|
|
/// isConstantExpr - Return true if this is a ConstantExpr
|
|
virtual bool isConstantExpr() const { return true; }
|
|
|
|
virtual void destroyConstant();
|
|
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To,
|
|
bool DisableChecking = false);
|
|
|
|
/// Override methods to provide more type information...
|
|
inline Constant *getOperand(unsigned i) {
|
|
return cast<Constant>(User::getOperand(i));
|
|
}
|
|
inline Constant *getOperand(unsigned i) const {
|
|
return const_cast<Constant*>(cast<Constant>(User::getOperand(i)));
|
|
}
|
|
|
|
|
|
/// 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();
|
|
}
|
|
static inline bool classof(const Value *V) {
|
|
return isa<Constant>(V) && classof(cast<Constant>(V));
|
|
}
|
|
};
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|