llvm-6502/include/llvm/MC/MCSymbol.h
Chris Lattner 975780bb59 change AsmPrinter to switch sections using AsmStreamer instead of
doing it directly.  This requires const'izing a bunch of stuff that
took sections, but this seems like the right semantic thing to do:
emitting a label to a section shouldn't mutate the MCSection object
itself, for example.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79227 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17 05:49:08 +00:00

76 lines
2.6 KiB
C++

//===- MCSymbol.h - Machine Code Symbols ------------------------*- 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 MCSymbol class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCSYMBOL_H
#define LLVM_MC_MCSYMBOL_H
#include <string>
#include "llvm/ADT/StringRef.h"
namespace llvm {
class MCSection;
class MCContext;
class raw_ostream;
/// MCSymbol - Instances of this class represent a symbol name in the MC file,
/// and MCSymbols are created and unique'd by the MCContext class.
///
/// If the symbol is defined/emitted into the current translation unit, the
/// Section member is set to indicate what section it lives in. Otherwise, if
/// it is a reference to an external entity, it has a null section.
///
class MCSymbol {
/// Name - The name of the symbol.
std::string Name;
/// Section - The section the symbol is defined in, or null if the symbol
/// has not been defined in the associated translation unit.
const MCSection *Section;
/// IsTemporary - True if this is an assembler temporary label, which
/// typically does not survive in the .o file's symbol table. Usually
/// "Lfoo" or ".foo".
unsigned IsTemporary : 1;
/// IsExternal - True if this symbol has been implicitly defined as an
/// external, for example by using it in an expression without ever emitting
/// it as a label. The @var Section for an external symbol is always null.
unsigned IsExternal : 1;
private: // MCContext creates and uniques these.
friend class MCContext;
MCSymbol(const StringRef &_Name, bool _IsTemporary)
: Name(_Name), Section(0), IsTemporary(_IsTemporary), IsExternal(false) {}
MCSymbol(const MCSymbol&); // DO NOT IMPLEMENT
void operator=(const MCSymbol&); // DO NOT IMPLEMENT
public:
const MCSection *getSection() const { return Section; }
void setSection(const MCSection *S) { Section = S; }
bool isExternal() const { return IsExternal; }
void setExternal(bool Value) { IsExternal = Value; }
const std::string &getName() const { return Name; }
/// print - Print the value to the stream \arg OS.
void print(raw_ostream &OS) const;
/// dump - Print the value to stderr.
void dump() const;
};
} // end namespace llvm
#endif