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there need to be corresponding changes to the constant folders, done in this patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82862 91177308-0d34-0410-b5e6-96231b3b80d8
855 lines
35 KiB
C++
855 lines
35 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 is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// @file
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/// This file contains the declarations for the subclasses of Constant,
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/// which represent the different flavors of constant values that live in LLVM.
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/// Note that Constants are immutable (once created they never change) and are
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/// fully shared by structural equivalence. This means that two structurally
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/// equivalent constants will always have the same address. Constant's are
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/// created on demand as needed and never deleted: thus clients don't have to
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/// worry about the lifetime of the objects.
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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 "llvm/Type.h"
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#include "llvm/OperandTraits.h"
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#include "llvm/ADT/APInt.h"
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/SmallVector.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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class VectorType;
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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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/// This is the shared class of boolean and integer constants. This class
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/// represents both boolean and integral constants.
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/// @brief Class for constant integers.
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class ConstantInt : public Constant {
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static ConstantInt *TheTrueVal, *TheFalseVal;
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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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ConstantInt(const ConstantInt &); // DO NOT IMPLEMENT
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ConstantInt(const IntegerType *Ty, const APInt& V);
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APInt Val;
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protected:
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// allocate space for exactly zero operands
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void *operator new(size_t s) {
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return User::operator new(s, 0);
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}
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public:
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static ConstantInt* getTrue(LLVMContext &Context);
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static ConstantInt* getFalse(LLVMContext &Context);
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/// If Ty is a vector type, return a Constant with a splat of the given
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/// value. Otherwise return a ConstantInt for the given value.
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static Constant* get(const Type* Ty, uint64_t V, bool isSigned = false);
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/// Return a ConstantInt with the specified integer value for the specified
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/// type. If the type is wider than 64 bits, the value will be zero-extended
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/// to fit the type, unless isSigned is true, in which case the value will
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/// be interpreted as a 64-bit signed integer and sign-extended to fit
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/// the type.
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/// @brief Get a ConstantInt for a specific value.
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static ConstantInt* get(const IntegerType* Ty, uint64_t V,
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bool isSigned = false);
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/// Return a ConstantInt with the specified value for the specified type. The
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/// value V will be canonicalized to a an unsigned APInt. Accessing it with
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/// either getSExtValue() or getZExtValue() will yield a correctly sized and
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/// signed value for the type Ty.
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/// @brief Get a ConstantInt for a specific signed value.
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static ConstantInt* getSigned(const IntegerType* Ty, int64_t V);
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static Constant *getSigned(const Type *Ty, int64_t V);
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/// Return a ConstantInt with the specified value and an implied Type. The
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/// type is the integer type that corresponds to the bit width of the value.
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static ConstantInt* get(LLVMContext &Context, const APInt& V);
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/// Return a ConstantInt constructed from the string strStart with the given
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/// radix.
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static ConstantInt* get(const IntegerType* Ty, const StringRef& Str,
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uint8_t radix);
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/// If Ty is a vector type, return a Constant with a splat of the given
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/// value. Otherwise return a ConstantInt for the given value.
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static Constant* get(const Type* Ty, const APInt& V);
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/// Return the constant as an APInt value reference. This allows clients to
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/// obtain a copy of the value, with all its precision in tact.
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/// @brief Return the constant's value.
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inline const APInt& getValue() const {
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return Val;
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}
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/// getBitWidth - Return the bitwidth of this constant.
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unsigned getBitWidth() const { return Val.getBitWidth(); }
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/// Return the constant as a 64-bit unsigned integer value after it
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/// has been zero extended as appropriate for the type of this constant. Note
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/// that this method can assert if the value does not fit in 64 bits.
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/// @deprecated
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/// @brief Return the zero extended value.
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inline uint64_t getZExtValue() const {
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return Val.getZExtValue();
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}
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/// Return the constant as a 64-bit integer value after it has been sign
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/// extended as appropriate for the type of this constant. Note that
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/// this method can assert if the value does not fit in 64 bits.
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/// @deprecated
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/// @brief Return the sign extended value.
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inline int64_t getSExtValue() const {
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return Val.getSExtValue();
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}
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/// A helper method that can be used to determine if the constant contained
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/// within is equal to a constant. This only works for very small values,
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/// because this is all that can be represented with all types.
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/// @brief Determine if this constant's value is same as an unsigned char.
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bool equalsInt(uint64_t V) const {
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return Val == V;
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}
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/// getType - Specialize the getType() method to always return an IntegerType,
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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 IntegerType *getType() const {
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return reinterpret_cast<const IntegerType*>(Value::getType());
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}
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/// This static method returns true if the type Ty is big enough to
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/// represent the value V. This can be used to avoid having the get method
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/// assert when V is larger than Ty can represent. Note that there are two
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/// versions of this method, one for unsigned and one for signed integers.
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/// Although ConstantInt canonicalizes everything to an unsigned integer,
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/// the signed version avoids callers having to convert a signed quantity
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/// to the appropriate unsigned type before calling the method.
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/// @returns true if V is a valid value for type Ty
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/// @brief Determine if the value is in range for the given type.
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static bool isValueValidForType(const Type *Ty, uint64_t V);
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static bool isValueValidForType(const Type *Ty, int64_t V);
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/// This function will return true iff this constant represents the "null"
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/// value that would be returned by the getNullValue method.
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/// @returns true if this is the null integer value.
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/// @brief Determine if the value is null.
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virtual bool isNullValue() const {
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return Val == 0;
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}
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/// This is just a convenience method to make client code smaller for a
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/// common code. It also correctly performs the comparison without the
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/// potential for an assertion from getZExtValue().
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bool isZero() const {
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return Val == 0;
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}
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/// This is just a convenience method to make client code smaller for a
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/// common case. It also correctly performs the comparison without the
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/// potential for an assertion from getZExtValue().
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/// @brief Determine if the value is one.
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bool isOne() const {
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return Val == 1;
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}
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/// This function will return true iff every bit in this constant is set
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/// to true.
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/// @returns true iff this constant's bits are all set to true.
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/// @brief Determine if the value is all ones.
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bool isAllOnesValue() const {
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return Val.isAllOnesValue();
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}
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/// This function will return true iff this constant represents the largest
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/// value that may be represented by the constant's type.
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/// @returns true iff this is the largest value that may be represented
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/// by this type.
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/// @brief Determine if the value is maximal.
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bool isMaxValue(bool isSigned) const {
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if (isSigned)
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return Val.isMaxSignedValue();
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else
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return Val.isMaxValue();
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}
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/// This function will return true iff this constant represents the smallest
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/// value that may be represented by this constant's type.
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/// @returns true if this is the smallest value that may be represented by
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/// this type.
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/// @brief Determine if the value is minimal.
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bool isMinValue(bool isSigned) const {
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if (isSigned)
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return Val.isMinSignedValue();
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else
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return Val.isMinValue();
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}
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/// This function will return true iff this constant represents a value with
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/// active bits bigger than 64 bits or a value greater than the given uint64_t
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/// value.
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/// @returns true iff this constant is greater or equal to the given number.
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/// @brief Determine if the value is greater or equal to the given number.
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bool uge(uint64_t Num) {
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return Val.getActiveBits() > 64 || Val.getZExtValue() >= Num;
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}
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/// getLimitedValue - If the value is smaller than the specified limit,
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/// return it, otherwise return the limit value. This causes the value
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/// to saturate to the limit.
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/// @returns the min of the value of the constant and the specified value
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/// @brief Get the constant's value with a saturation limit
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uint64_t getLimitedValue(uint64_t Limit = ~0ULL) const {
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return Val.getLimitedValue(Limit);
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}
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/// @brief Methods to 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 Value *V) {
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return V->getValueID() == ConstantIntVal;
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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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APFloat Val;
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void *operator new(size_t, unsigned);// DO NOT IMPLEMENT
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ConstantFP(const ConstantFP &); // DO NOT IMPLEMENT
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friend class LLVMContextImpl;
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protected:
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ConstantFP(const Type *Ty, const APFloat& V);
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protected:
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// allocate space for exactly zero operands
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void *operator new(size_t s) {
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return User::operator new(s, 0);
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}
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public:
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/// Floating point negation must be implemented with f(x) = -0.0 - x. This
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/// method returns the negative zero constant for floating point or vector
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/// floating point types; for all other types, it returns the null value.
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static Constant* getZeroValueForNegation(const Type* Ty);
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/// get() - This returns a ConstantFP, or a vector containing a splat of a
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/// ConstantFP, for the specified value in the specified type. This should
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/// only be used for simple constant values like 2.0/1.0 etc, that are
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/// known-valid both as host double and as the target format.
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static Constant* get(const Type* Ty, double V);
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static Constant* get(const Type* Ty, const StringRef& Str);
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static ConstantFP* get(LLVMContext &Context, const APFloat& V);
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static ConstantFP* getNegativeZero(const Type* Ty);
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static ConstantFP* getInfinity(const Type* Ty, bool negative = false);
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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, const APFloat& V);
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inline const APFloat& getValueAPF() 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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/// isNegativeZeroValue - Return true if the value is what would be returned
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/// by getZeroValueForNegation.
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virtual bool isNegativeZeroValue() const {
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return Val.isZero() && Val.isNegative();
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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. The version with a double operand is retained
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/// because it's so convenient to write isExactlyValue(2.0), but please use
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/// it only for simple constants.
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bool isExactlyValue(const APFloat& V) const;
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bool isExactlyValue(double V) const {
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bool ignored;
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// convert is not supported on this type
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if (&Val.getSemantics() == &APFloat::PPCDoubleDouble)
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return false;
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APFloat FV(V);
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FV.convert(Val.getSemantics(), APFloat::rmNearestTiesToEven, &ignored);
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return isExactlyValue(FV);
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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 Value *V) {
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return V->getValueID() == ConstantFPVal;
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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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void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
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ConstantAggregateZero(const ConstantAggregateZero &); // DO NOT IMPLEMENT
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protected:
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explicit ConstantAggregateZero(const Type *ty)
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: Constant(ty, ConstantAggregateZeroVal, 0, 0) {}
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protected:
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// allocate space for exactly zero operands
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void *operator new(size_t s) {
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return User::operator new(s, 0);
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}
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public:
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static ConstantAggregateZero* 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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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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///
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static bool classof(const ConstantAggregateZero *) { return true; }
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static bool classof(const Value *V) {
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return V->getValueID() == ConstantAggregateZeroVal;
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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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// ConstantArray accessors
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static Constant* get(const ArrayType* T, const std::vector<Constant*>& V);
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static Constant* get(const ArrayType* T, Constant* const* Vals,
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unsigned NumVals);
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/// This method constructs a ConstantArray and initializes it with a text
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/// string. The default behavior (AddNull==true) causes a null terminator to
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/// be placed at the end of the array. This effectively increases the length
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/// of the array by one (you've been warned). However, in some situations
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/// this is not desired so if AddNull==false then the string is copied without
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/// null termination.
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static Constant* get(LLVMContext &Context, const StringRef &Initializer,
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bool AddNull = true);
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
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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 i8 and
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/// the elements of the array are all ConstantInt's.
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bool isString() const;
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/// isCString - This method returns true if the array is a string (see
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/// @verbatim
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/// isString) and it ends in a null byte \0 and does not contains any other
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/// @endverbatim
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/// null bytes except its terminator.
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bool isCString() 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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/// 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, Use *U);
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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 Value *V) {
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return V->getValueID() == ConstantArrayVal;
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}
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};
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template <>
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struct OperandTraits<ConstantArray> : public VariadicOperandTraits<> {
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};
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DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantArray, Constant)
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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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// ConstantStruct accessors
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static Constant* get(const StructType* T, const std::vector<Constant*>& V);
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static Constant* get(LLVMContext &Context,
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const std::vector<Constant*>& V, bool Packed);
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static Constant* get(LLVMContext &Context,
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Constant* const *Vals, unsigned NumVals,
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bool Packed);
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
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/// getType() specialization - Reduce amount of casting...
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///
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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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/// 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, Use *U);
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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 Value *V) {
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return V->getValueID() == ConstantStructVal;
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}
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};
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template <>
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struct OperandTraits<ConstantStruct> : public VariadicOperandTraits<> {
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};
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DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantStruct, Constant)
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//===----------------------------------------------------------------------===//
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/// ConstantVector - Constant Vector Declarations
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///
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class ConstantVector : public Constant {
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friend struct ConstantCreator<ConstantVector, VectorType,
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std::vector<Constant*> >;
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ConstantVector(const ConstantVector &); // DO NOT IMPLEMENT
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protected:
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ConstantVector(const VectorType *T, const std::vector<Constant*> &Val);
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public:
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// ConstantVector accessors
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static Constant* get(const VectorType* T, const std::vector<Constant*>& V);
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static Constant* get(const std::vector<Constant*>& V);
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static Constant* get(Constant* const* Vals, unsigned NumVals);
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/// Transparently provide more efficient getOperand methods.
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DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
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/// getType - Specialize the getType() method to always return a VectorType,
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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 VectorType *getType() const {
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|
return reinterpret_cast<const VectorType*>(Value::getType());
|
|
}
|
|
|
|
/// isNullValue - Return true if this is the value that would be returned by
|
|
/// getNullValue. This always returns false because zero vectors are always
|
|
/// created as ConstantAggregateZero objects.
|
|
virtual bool isNullValue() const { return false; }
|
|
|
|
/// This function will return true iff every element in this vector constant
|
|
/// is set to all ones.
|
|
/// @returns true iff this constant's emements are all set to all ones.
|
|
/// @brief Determine if the value is all ones.
|
|
bool isAllOnesValue() const;
|
|
|
|
/// 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();
|
|
|
|
virtual void destroyConstant();
|
|
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
|
|
|
|
/// Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const ConstantVector *) { return true; }
|
|
static bool classof(const Value *V) {
|
|
return V->getValueID() == ConstantVectorVal;
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct OperandTraits<ConstantVector> : public VariadicOperandTraits<> {
|
|
};
|
|
|
|
DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantVector, Constant)
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// ConstantPointerNull - a constant pointer value that points to null
|
|
///
|
|
class ConstantPointerNull : public Constant {
|
|
friend struct ConstantCreator<ConstantPointerNull, PointerType, char>;
|
|
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
|
|
ConstantPointerNull(const ConstantPointerNull &); // DO NOT IMPLEMENT
|
|
protected:
|
|
explicit ConstantPointerNull(const PointerType *T)
|
|
: Constant(reinterpret_cast<const Type*>(T),
|
|
Value::ConstantPointerNullVal, 0, 0) {}
|
|
|
|
protected:
|
|
// allocate space for exactly zero operands
|
|
void *operator new(size_t s) {
|
|
return User::operator new(s, 0);
|
|
}
|
|
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.
|
|
virtual bool isNullValue() const { return true; }
|
|
|
|
virtual void destroyConstant();
|
|
|
|
/// getType - Specialize the getType() method to always return an PointerType,
|
|
/// which reduces the amount of casting needed in parts of the compiler.
|
|
///
|
|
inline const PointerType *getType() const {
|
|
return reinterpret_cast<const PointerType*>(Value::getType());
|
|
}
|
|
|
|
/// Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const ConstantPointerNull *) { return true; }
|
|
static bool classof(const Value *V) {
|
|
return V->getValueID() == ConstantPointerNullVal;
|
|
}
|
|
};
|
|
|
|
|
|
/// ConstantExpr - a constant value that is initialized with an expression using
|
|
/// other constant values.
|
|
///
|
|
/// This class uses the standard Instruction opcodes to define the various
|
|
/// constant expressions. The Opcode field for the ConstantExpr class is
|
|
/// maintained in the Value::SubclassData field.
|
|
class ConstantExpr : public Constant {
|
|
friend struct ConstantCreator<ConstantExpr,Type,
|
|
std::pair<unsigned, std::vector<Constant*> > >;
|
|
friend struct ConvertConstantType<ConstantExpr, Type>;
|
|
|
|
protected:
|
|
ConstantExpr(const Type *ty, unsigned Opcode, Use *Ops, unsigned NumOps)
|
|
: Constant(ty, ConstantExprVal, Ops, NumOps) {
|
|
// Operation type (an Instruction opcode) is stored as the SubclassData.
|
|
SubclassData = Opcode;
|
|
}
|
|
|
|
// 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,
|
|
unsigned Flags = 0);
|
|
static Constant *getCompareTy(unsigned short pred, Constant *C1,
|
|
Constant *C2);
|
|
static Constant *getSelectTy(const Type *Ty,
|
|
Constant *C1, Constant *C2, Constant *C3);
|
|
static Constant *getGetElementPtrTy(const Type *Ty, Constant *C,
|
|
Value* const *Idxs, unsigned NumIdxs);
|
|
static Constant *getInBoundsGetElementPtrTy(const Type *Ty, Constant *C,
|
|
Value* const *Idxs,
|
|
unsigned NumIdxs);
|
|
static Constant *getExtractElementTy(const Type *Ty, Constant *Val,
|
|
Constant *Idx);
|
|
static Constant *getInsertElementTy(const Type *Ty, Constant *Val,
|
|
Constant *Elt, Constant *Idx);
|
|
static Constant *getShuffleVectorTy(const Type *Ty, Constant *V1,
|
|
Constant *V2, Constant *Mask);
|
|
static Constant *getExtractValueTy(const Type *Ty, Constant *Agg,
|
|
const unsigned *Idxs, unsigned NumIdxs);
|
|
static Constant *getInsertValueTy(const Type *Ty, Constant *Agg,
|
|
Constant *Val,
|
|
const unsigned *Idxs, unsigned NumIdxs);
|
|
|
|
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
|
|
///
|
|
|
|
/// getAlignOf constant expr - computes the alignment of a type in a target
|
|
/// independent way (Note: the return type is an i32; Note: assumes that i8
|
|
/// is byte aligned).
|
|
static Constant* getAlignOf(const Type* Ty);
|
|
|
|
/// getSizeOf constant expr - computes the size of a type in a target
|
|
/// independent way (Note: the return type is an i64).
|
|
///
|
|
static Constant* getSizeOf(const Type* Ty);
|
|
|
|
/// getOffsetOf constant expr - computes the offset of a field in a target
|
|
/// independent way (Note: the return type is an i64).
|
|
///
|
|
static Constant* getOffsetOf(const StructType* Ty, unsigned FieldNo);
|
|
|
|
static Constant* getNeg(Constant* C);
|
|
static Constant* getFNeg(Constant* C);
|
|
static Constant* getNot(Constant* C);
|
|
static Constant* getAdd(Constant* C1, Constant* C2);
|
|
static Constant* getFAdd(Constant* C1, Constant* C2);
|
|
static Constant* getSub(Constant* C1, Constant* C2);
|
|
static Constant* getFSub(Constant* C1, Constant* C2);
|
|
static Constant* getMul(Constant* C1, Constant* C2);
|
|
static Constant* getFMul(Constant* C1, Constant* C2);
|
|
static Constant* getUDiv(Constant* C1, Constant* C2);
|
|
static Constant* getSDiv(Constant* C1, Constant* C2);
|
|
static Constant* getFDiv(Constant* C1, Constant* C2);
|
|
static Constant* getURem(Constant* C1, Constant* C2);
|
|
static Constant* getSRem(Constant* C1, Constant* C2);
|
|
static Constant* getFRem(Constant* C1, Constant* C2);
|
|
static Constant* getAnd(Constant* C1, Constant* C2);
|
|
static Constant* getOr(Constant* C1, Constant* C2);
|
|
static Constant* getXor(Constant* C1, Constant* C2);
|
|
static Constant* getShl(Constant* C1, Constant* C2);
|
|
static Constant* getLShr(Constant* C1, Constant* C2);
|
|
static Constant* getAShr(Constant* C1, Constant* C2);
|
|
static Constant *getTrunc (Constant *C, const Type *Ty);
|
|
static Constant *getSExt (Constant *C, const Type *Ty);
|
|
static Constant *getZExt (Constant *C, const Type *Ty);
|
|
static Constant *getFPTrunc (Constant *C, const Type *Ty);
|
|
static Constant *getFPExtend(Constant *C, const Type *Ty);
|
|
static Constant *getUIToFP (Constant *C, const Type *Ty);
|
|
static Constant *getSIToFP (Constant *C, const Type *Ty);
|
|
static Constant *getFPToUI (Constant *C, const Type *Ty);
|
|
static Constant *getFPToSI (Constant *C, const Type *Ty);
|
|
static Constant *getPtrToInt(Constant *C, const Type *Ty);
|
|
static Constant *getIntToPtr(Constant *C, const Type *Ty);
|
|
static Constant *getBitCast (Constant *C, const Type *Ty);
|
|
|
|
static Constant* getNSWAdd(Constant* C1, Constant* C2);
|
|
static Constant* getNSWSub(Constant* C1, Constant* C2);
|
|
static Constant* getExactSDiv(Constant* C1, Constant* C2);
|
|
|
|
/// Transparently provide more efficient getOperand methods.
|
|
DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
|
|
|
|
// @brief Convenience function for getting one of the casting operations
|
|
// using a CastOps opcode.
|
|
static Constant *getCast(
|
|
unsigned ops, ///< The opcode for the conversion
|
|
Constant *C, ///< The constant to be converted
|
|
const Type *Ty ///< The type to which the constant is converted
|
|
);
|
|
|
|
// @brief Create a ZExt or BitCast cast constant expression
|
|
static Constant *getZExtOrBitCast(
|
|
Constant *C, ///< The constant to zext or bitcast
|
|
const Type *Ty ///< The type to zext or bitcast C to
|
|
);
|
|
|
|
// @brief Create a SExt or BitCast cast constant expression
|
|
static Constant *getSExtOrBitCast(
|
|
Constant *C, ///< The constant to sext or bitcast
|
|
const Type *Ty ///< The type to sext or bitcast C to
|
|
);
|
|
|
|
// @brief Create a Trunc or BitCast cast constant expression
|
|
static Constant *getTruncOrBitCast(
|
|
Constant *C, ///< The constant to trunc or bitcast
|
|
const Type *Ty ///< The type to trunc or bitcast C to
|
|
);
|
|
|
|
/// @brief Create a BitCast or a PtrToInt cast constant expression
|
|
static Constant *getPointerCast(
|
|
Constant *C, ///< The pointer value to be casted (operand 0)
|
|
const Type *Ty ///< The type to which cast should be made
|
|
);
|
|
|
|
/// @brief Create a ZExt, Bitcast or Trunc for integer -> integer casts
|
|
static Constant *getIntegerCast(
|
|
Constant *C, ///< The integer constant to be casted
|
|
const Type *Ty, ///< The integer type to cast to
|
|
bool isSigned ///< Whether C should be treated as signed or not
|
|
);
|
|
|
|
/// @brief Create a FPExt, Bitcast or FPTrunc for fp -> fp casts
|
|
static Constant *getFPCast(
|
|
Constant *C, ///< The integer constant to be casted
|
|
const Type *Ty ///< The integer type to cast to
|
|
);
|
|
|
|
/// @brief Return true if this is a convert constant expression
|
|
bool isCast() const;
|
|
|
|
/// @brief Return true if this is a compare constant expression
|
|
bool isCompare() const;
|
|
|
|
/// @brief Return true if this is an insertvalue or extractvalue expression,
|
|
/// and the getIndices() method may be used.
|
|
bool hasIndices() const;
|
|
|
|
/// @brief Return true if this is a getelementptr expression and all
|
|
/// the index operands are compile-time known integers within the
|
|
/// corresponding notional static array extents. Note that this is
|
|
/// not equivalant to, a subset of, or a superset of the "inbounds"
|
|
/// property.
|
|
bool isGEPWithNoNotionalOverIndexing() const;
|
|
|
|
/// Select constant expr
|
|
///
|
|
static Constant *getSelect(Constant *C, Constant *V1, Constant *V2) {
|
|
return getSelectTy(V1->getType(), C, V1, V2);
|
|
}
|
|
|
|
/// get - Return a binary or shift operator constant expression,
|
|
/// folding if possible.
|
|
///
|
|
static Constant *get(unsigned Opcode, Constant *C1, Constant *C2,
|
|
unsigned Flags = 0);
|
|
|
|
/// @brief Return an ICmp or FCmp comparison operator constant expression.
|
|
static Constant *getCompare(unsigned short pred, Constant *C1, Constant *C2);
|
|
|
|
/// get* - Return some common constants without having to
|
|
/// specify the full Instruction::OPCODE identifier.
|
|
///
|
|
static Constant *getICmp(unsigned short pred, Constant *LHS, Constant *RHS);
|
|
static Constant *getFCmp(unsigned short pred, Constant *LHS, Constant *RHS);
|
|
|
|
/// Getelementptr form. std::vector<Value*> is only accepted for convenience:
|
|
/// all elements must be Constant's.
|
|
///
|
|
static Constant *getGetElementPtr(Constant *C,
|
|
Constant* const *IdxList, unsigned NumIdx);
|
|
static Constant *getGetElementPtr(Constant *C,
|
|
Value* const *IdxList, unsigned NumIdx);
|
|
|
|
/// Create an "inbounds" getelementptr. See the documentation for the
|
|
/// "inbounds" flag in LangRef.html for details.
|
|
static Constant *getInBoundsGetElementPtr(Constant *C,
|
|
Constant* const *IdxList,
|
|
unsigned NumIdx);
|
|
static Constant *getInBoundsGetElementPtr(Constant *C,
|
|
Value* const *IdxList,
|
|
unsigned NumIdx);
|
|
|
|
static Constant *getExtractElement(Constant *Vec, Constant *Idx);
|
|
static Constant *getInsertElement(Constant *Vec, Constant *Elt,Constant *Idx);
|
|
static Constant *getShuffleVector(Constant *V1, Constant *V2, Constant *Mask);
|
|
static Constant *getExtractValue(Constant *Agg,
|
|
const unsigned *IdxList, unsigned NumIdx);
|
|
static Constant *getInsertValue(Constant *Agg, Constant *Val,
|
|
const unsigned *IdxList, unsigned NumIdx);
|
|
|
|
/// 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 SubclassData; }
|
|
|
|
/// getPredicate - Return the ICMP or FCMP predicate value. Assert if this is
|
|
/// not an ICMP or FCMP constant expression.
|
|
unsigned getPredicate() const;
|
|
|
|
/// getIndices - Assert that this is an insertvalue or exactvalue
|
|
/// expression and return the list of indices.
|
|
const SmallVector<unsigned, 4> &getIndices() const;
|
|
|
|
/// getOpcodeName - Return a string representation for an opcode.
|
|
const char *getOpcodeName() const;
|
|
|
|
/// getWithOperandReplaced - Return a constant expression identical to this
|
|
/// one, but with the specified operand set to the specified value.
|
|
Constant *getWithOperandReplaced(unsigned OpNo, Constant *Op) const;
|
|
|
|
/// getWithOperands - This returns the current constant expression with the
|
|
/// operands replaced with the specified values. The specified operands must
|
|
/// match count and type with the existing ones.
|
|
Constant *getWithOperands(const std::vector<Constant*> &Ops) const {
|
|
return getWithOperands(&Ops[0], (unsigned)Ops.size());
|
|
}
|
|
Constant *getWithOperands(Constant* const *Ops, unsigned NumOps) const;
|
|
|
|
virtual void destroyConstant();
|
|
virtual void replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U);
|
|
|
|
/// Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const ConstantExpr *) { return true; }
|
|
static inline bool classof(const Value *V) {
|
|
return V->getValueID() == ConstantExprVal;
|
|
}
|
|
};
|
|
|
|
template <>
|
|
struct OperandTraits<ConstantExpr> : public VariadicOperandTraits<1> {
|
|
};
|
|
|
|
DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantExpr, Constant)
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
/// UndefValue - 'undef' values are things that do not have specified contents.
|
|
/// These are used for a variety of purposes, including global variable
|
|
/// initializers and operands to instructions. 'undef' values can occur with
|
|
/// any type.
|
|
///
|
|
class UndefValue : public Constant {
|
|
friend struct ConstantCreator<UndefValue, Type, char>;
|
|
void *operator new(size_t, unsigned); // DO NOT IMPLEMENT
|
|
UndefValue(const UndefValue &); // DO NOT IMPLEMENT
|
|
protected:
|
|
explicit UndefValue(const Type *T) : Constant(T, UndefValueVal, 0, 0) {}
|
|
protected:
|
|
// allocate space for exactly zero operands
|
|
void *operator new(size_t s) {
|
|
return User::operator new(s, 0);
|
|
}
|
|
public:
|
|
/// get() - Static factory methods - Return an 'undef' object of the specified
|
|
/// type.
|
|
///
|
|
static UndefValue *get(const Type *T);
|
|
|
|
/// 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:
|
|
static inline bool classof(const UndefValue *) { return true; }
|
|
static bool classof(const Value *V) {
|
|
return V->getValueID() == UndefValueVal;
|
|
}
|
|
};
|
|
} // End llvm namespace
|
|
|
|
#endif
|