llvm-6502/include/llvm/Argument.h
2008-02-17 23:22:28 +00:00

88 lines
2.9 KiB
C++

//===-- llvm/Argument.h - Definition of the Argument class ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares the Argument class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ARGUMENT_H
#define LLVM_ARGUMENT_H
#include "llvm/Value.h"
namespace llvm {
template<typename ValueSubClass, typename ItemParentClass>
class SymbolTableListTraits;
/// A class to represent an incoming formal argument to a Function. An argument
/// is a very simple Value. It is essentially a named (optional) type. When used
/// in the body of a function, it represents the value of the actual argument
/// the function was called with.
/// @brief LLVM Argument representation
class Argument : public Value { // Defined in the Function.cpp file
Function *Parent;
Argument *Prev, *Next; // Next and Prev links for our intrusive linked list
void setNext(Argument *N) { Next = N; }
void setPrev(Argument *N) { Prev = N; }
friend class SymbolTableListTraits<Argument, Function>;
void setParent(Function *parent);
public:
/// Argument ctor - If Function argument is specified, this argument is
/// inserted at the end of the argument list for the function.
///
explicit Argument(const Type *Ty, const std::string &Name = "",
Function *F = 0);
inline const Function *getParent() const { return Parent; }
inline Function *getParent() { return Parent; }
/// getArgNo - Return the index of this formal argument in its containing
/// function. For example in "void foo(int a, float b)" a is 0 and b is 1.
unsigned getArgNo() const;
/// hasByValAttr - Return true if this argument has the byval attribute on it
/// in its containing function.
bool hasByValAttr() const;
/// hasNoAliasAttr - Return true if this argument has the noalias attribute on
/// it in its containing function.
bool hasNoAliasAttr() const;
/// hasSRetAttr - Return true if this argument has the sret attribute on it in
/// its containing function.
bool hasStructRetAttr() const;
virtual void print(std::ostream &OS) const;
void print(std::ostream *OS) const {
if (OS) print(*OS);
}
/// classof - Methods for support type inquiry through isa, cast, and
/// dyn_cast:
///
static inline bool classof(const Argument *) { return true; }
static inline bool classof(const Value *V) {
return V->getValueID() == ArgumentVal;
}
private:
// getNext/Prev - Return the next or previous argument in the list.
Argument *getNext() { return Next; }
const Argument *getNext() const { return Next; }
Argument *getPrev() { return Prev; }
const Argument *getPrev() const { return Prev; }
};
} // End llvm namespace
#endif