mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 12:12:47 +01:00
85cf7de5b9
* Move code out of header file to .cpp files, to make future changes easier * Add arguments to classes so that they can be automatically inserted into their parent structure upon creation. llvm-svn: 3604
89 lines
3.4 KiB
C++
89 lines
3.4 KiB
C++
//===-- llvm/Global.h - Class to represent a global variable -----*- C++ -*--=//
|
|
//
|
|
// This file contains the declaration of the GlobalVariable class, which
|
|
// represents a single global variable (or constant) in the VM.
|
|
//
|
|
// Global variables are constant pointers that refer to hunks of space that are
|
|
// allocated by either the VM, or by the linker in a static compiler. A global
|
|
// variable may have an intial value, which is copied into the executables .data
|
|
// area. Global Constants are required to have initializers.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_GLOBAL_VARIABLE_H
|
|
#define LLVM_GLOBAL_VARIABLE_H
|
|
|
|
#include "llvm/GlobalValue.h"
|
|
class Module;
|
|
class Constant;
|
|
class PointerType;
|
|
template<typename SC> struct ilist_traits;
|
|
template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
|
|
typename SubClass> class SymbolTableListTraits;
|
|
|
|
class GlobalVariable : public GlobalValue {
|
|
friend class SymbolTableListTraits<GlobalVariable, Module, Module,
|
|
ilist_traits<GlobalVariable> >;
|
|
void setParent(Module *parent);
|
|
|
|
GlobalVariable *Prev, *Next;
|
|
void setNext(GlobalVariable *N) { Next = N; }
|
|
void setPrev(GlobalVariable *N) { Prev = N; }
|
|
|
|
bool isConstantGlobal; // Is this a global constant?
|
|
public:
|
|
/// GlobalVariable ctor - If a parent module is specified, the global is
|
|
/// automatically inserted into the end of the specified modules global list.
|
|
///
|
|
GlobalVariable(const Type *Ty, bool isConstant, bool isInternal,
|
|
Constant *Initializer = 0, const std::string &Name = "",
|
|
Module *Parent = 0);
|
|
|
|
// Specialize setName to handle symbol table majik...
|
|
virtual void setName(const std::string &name, SymbolTable *ST = 0);
|
|
|
|
// The initializer for the global variable/constant is held by Operands[0] if
|
|
// an initializer is specified.
|
|
//
|
|
inline bool hasInitializer() const { return !Operands.empty(); }
|
|
inline Constant *getInitializer() const {
|
|
assert(hasInitializer() && "GV doesn't have initializer!");
|
|
return (Constant*)Operands[0].get();
|
|
}
|
|
inline Constant *getInitializer() {
|
|
assert(hasInitializer() && "GV doesn't have initializer!");
|
|
return (Constant*)Operands[0].get();
|
|
}
|
|
inline void setInitializer(Constant *CPV) {
|
|
if (CPV == 0) {
|
|
if (hasInitializer()) Operands.pop_back();
|
|
} else {
|
|
if (!hasInitializer()) Operands.push_back(Use(0, this));
|
|
Operands[0] = (Value*)CPV;
|
|
}
|
|
}
|
|
|
|
// getNext/Prev - Return the next or previous instruction in the list. The
|
|
// last node in the list is a terminator instruction.
|
|
GlobalVariable *getNext() { return Next; }
|
|
const GlobalVariable *getNext() const { return Next; }
|
|
GlobalVariable *getPrev() { return Prev; }
|
|
const GlobalVariable *getPrev() const { return Prev; }
|
|
|
|
// If the value is a global constant, its value is immutable throughout the
|
|
// runtime execution of the program. Assigning a value into the constant
|
|
// leads to undefined behavior.
|
|
//
|
|
inline bool isConstant() const { return isConstantGlobal; }
|
|
|
|
virtual void print(std::ostream &OS) const;
|
|
|
|
// Methods for support type inquiry through isa, cast, and dyn_cast:
|
|
static inline bool classof(const GlobalVariable *) { return true; }
|
|
static inline bool classof(const Value *V) {
|
|
return V->getValueType() == Value::GlobalVariableVal;
|
|
}
|
|
};
|
|
|
|
#endif
|