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Diffstat (limited to 'release_23/include/llvm/Constant.h')
| -rw-r--r-- | release_23/include/llvm/Constant.h | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/release_23/include/llvm/Constant.h b/release_23/include/llvm/Constant.h deleted file mode 100644 index c3373f2513ca..000000000000 --- a/release_23/include/llvm/Constant.h +++ /dev/null @@ -1,129 +0,0 @@ -//===-- llvm/Constant.h - Constant class definition -------------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file contains the declaration of the Constant class. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_CONSTANT_H -#define LLVM_CONSTANT_H - -#include "llvm/User.h" - -namespace llvm { - -/// This is an important base class in LLVM. It provides the common facilities -/// of all constant values in an LLVM program. A constant is a value that is -/// immutable at runtime. Functions are constants because their address is -/// immutable. Same with global variables. -/// -/// All constants share the capabilities provided in this class. All constants -/// can have a null value. They can have an operand list. Constants can be -/// simple (integer and floating point values), complex (arrays and structures), -/// or expression based (computations yielding a constant value composed of -/// only certain operators and other constant values). -/// -/// Note that Constants are immutable (once created they never change) -/// and are fully shared by structural equivalence. This means that two -/// structurally equivalent constants will always have the same address. -/// Constant's are created on demand as needed and never deleted: thus clients -/// don't have to worry about the lifetime of the objects. -/// @brief LLVM Constant Representation -class Constant : public User { - void operator=(const Constant &); // Do not implement - Constant(const Constant &); // Do not implement -protected: - Constant(const Type *Ty, ValueTy vty, Use *Ops, unsigned NumOps) - : User(Ty, vty, Ops, NumOps) {} - - void destroyConstantImpl(); -public: - /// Static constructor to get a '0' constant of arbitrary type... - /// - static Constant *getNullValue(const Type *Ty); - - /// Static constructor to get a '-1' constant. This supports integers and - /// vectors. - /// - static Constant *getAllOnesValue(const Type *Ty); - - /// isNullValue - Return true if this is the value that would be returned by - /// getNullValue. - virtual bool isNullValue() const = 0; - - virtual void print(std::ostream &O) const; - void print(std::ostream *O) const { if (O) print(*O); } - - /// canTrap - Return true if evaluation of this constant could trap. This is - /// true for things like constant expressions that could divide by zero. - bool canTrap() const; - - /// ContaintsRelocations - Return true if the constant value contains - /// relocations which cannot be resolved at compile time. - bool ContainsRelocations() const; - - // Specialize get/setOperand for Constant's as their operands are always - // constants as well. - Constant *getOperand(unsigned i) { - return static_cast<Constant*>(User::getOperand(i)); - } - const Constant *getOperand(unsigned i) const { - return static_cast<const Constant*>(User::getOperand(i)); - } - void setOperand(unsigned i, Constant *C) { - User::setOperand(i, C); - } - - /// destroyConstant - Called if some element of this constant is no longer - /// valid. At this point only other constants may be on the use_list for this - /// constant. Any constants on our Use list must also be destroy'd. The - /// implementation must be sure to remove the constant from the list of - /// available cached constants. Implementations should call - /// destroyConstantImpl as the last thing they do, to destroy all users and - /// delete this. - virtual void destroyConstant() { assert(0 && "Not reached!"); } - - //// Methods for support type inquiry through isa, cast, and dyn_cast: - static inline bool classof(const Constant *) { return true; } - static inline bool classof(const GlobalValue *) { return true; } - static inline bool classof(const Value *V) { - return V->getValueID() >= ConstantFirstVal && - V->getValueID() <= ConstantLastVal; - } - - /// replaceUsesOfWithOnConstant - This method is a special form of - /// User::replaceUsesOfWith (which does not work on constants) that does work - /// on constants. Basically this method goes through the trouble of building - /// a new constant that is equivalent to the current one, with all uses of - /// From replaced with uses of To. After this construction is completed, all - /// of the users of 'this' are replaced to use the new constant, and then - /// 'this' is deleted. In general, you should not call this method, instead, - /// use Value::replaceAllUsesWith, which automatically dispatches to this - /// method as needed. - /// - virtual void replaceUsesOfWithOnConstant(Value *, Value *, Use *) { - // Provide a default implementation for constants (like integers) that - // cannot use any other values. This cannot be called at runtime, but needs - // to be here to avoid link errors. - assert(getNumOperands() == 0 && "replaceUsesOfWithOnConstant must be " - "implemented for all constants that have operands!"); - assert(0 && "Constants that do not have operands cannot be using 'From'!"); - } - - /// getStringValue - Turn an LLVM constant pointer that eventually points to a - /// global into a string value. Return an empty string if we can't do it. - /// Parameter Chop determines if the result is chopped at the first null - /// terminator. - /// - std::string getStringValue(bool Chop = true, unsigned Offset = 0); -}; - -} // End llvm namespace - -#endif |