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* Changes in PHI node structure * Fix to Predecessor iterator git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23 91177308-0d34-0410-b5e6-96231b3b80d8
125 lines
3.8 KiB
C++
125 lines
3.8 KiB
C++
//===-- llvm/Value.h - Definition of the Value class -------------*- C++ -*--=//
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//
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// This file defines the very important Value class. This is subclassed by a
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// bunch of other important classes, like Def, Method, Module, Type, etc...
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_VALUE_H
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#define LLVM_VALUE_H
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#include <string>
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#include <list>
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class User;
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class Type;
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template<class ValueSubclass, class ItemParentType> class ValueHolder;
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//===----------------------------------------------------------------------===//
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// Value Class
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//===----------------------------------------------------------------------===//
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class Value {
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public:
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enum ValueTy {
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TypeVal, // This is an instance of Type
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ConstantVal, // This is an instance of ConstPoolVal
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MethodArgumentVal, // This is an instance of MethodArgument
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InstructionVal, // This is an instance of Instruction
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BasicBlockVal, // This is an instance of BasicBlock
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MethodVal, // This is an instance of Method
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ModuleVal, // This is an instance of Module
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};
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private:
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list<User *> Uses;
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string Name;
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const Type *Ty;
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ValueTy VTy;
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Value(const Value &); // Do not implement
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protected:
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inline void setType(const Type *ty) { Ty = ty; }
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public:
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Value(const Type *Ty, ValueTy vty, const string &name = "");
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virtual ~Value();
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inline const Type *getType() const { return Ty; }
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inline ValueTy getValueType() const { return VTy; }
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inline bool hasName() const { return Name != ""; }
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inline const string &getName() const { return Name; }
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virtual void setName(const string &name) { Name = name; }
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// replaceAllUsesWith - Go through the uses list for this definition and make
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// each use point to "D" instead of "this". After this completes, 'this's
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// use list should be empty.
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//
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void replaceAllUsesWith(Value *D);
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//----------------------------------------------------------------------
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// Methods for handling the list of uses of this DEF.
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//
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typedef list<User*>::iterator use_iterator;
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typedef list<User*>::const_iterator use_const_iterator;
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inline unsigned use_size() const { return Uses.size(); }
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inline bool use_empty() const { return Uses.empty(); }
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inline use_iterator use_begin() { return Uses.begin(); }
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inline use_const_iterator use_begin() const { return Uses.begin(); }
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inline use_iterator use_end() { return Uses.end(); }
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inline use_const_iterator use_end() const { return Uses.end(); }
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inline void use_push_back(User *I) { Uses.push_back(I); }
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User *use_remove(use_iterator &I);
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inline void addUse(User *I) { Uses.push_back(I); }
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void killUse(User *I);
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};
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// UseTy and it's friendly typedefs (Use) are here to make keeping the "use"
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// list of a definition node up-to-date really easy.
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//
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template<class ValueSubclass>
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class UseTy {
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ValueSubclass *Val;
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User *U;
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public:
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inline UseTy<ValueSubclass>(ValueSubclass *v, User *user) {
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Val = v; U = user;
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if (Val) Val->addUse(U);
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}
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inline ~UseTy<ValueSubclass>() { if (Val) Val->killUse(U); }
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inline operator ValueSubclass *() const { return Val; }
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inline UseTy<ValueSubclass>(const UseTy<ValueSubclass> &user) {
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Val = 0;
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U = user.U;
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operator=(user.Val);
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}
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inline ValueSubclass *operator=(ValueSubclass *V) {
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if (Val) Val->killUse(U);
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Val = V;
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if (V) V->addUse(U);
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return V;
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}
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inline ValueSubclass *operator->() { return Val; }
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inline const ValueSubclass *operator->() const { return Val; }
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inline UseTy<ValueSubclass> &operator=(const UseTy<ValueSubclass> &user) {
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if (Val) Val->killUse(U);
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Val = user.Val;
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Val->addUse(U);
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return *this;
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}
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};
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typedef UseTy<Value> Use;
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#endif
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