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add some comments to MCSymbol header, make the ctor private so that only MCContext can create these.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74590 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-07-01 06:21:53 +00:00
parent e18e0c58dc
commit 14022f2a5a
1 changed files with 27 additions and 4 deletions
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29
include/llvm/MC/MCSymbol.h
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@ -6,6 +6,10 @@
// 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
@ -14,16 +18,35 @@
namespace llvm {
class MCSection;
class MCContext;
/// 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 {
MCSection *Section;
/// Name - The name of the symbol.
std::string Name;
/// Section - The section the symbol is defined in, or null if not defined
/// in this translation unit.
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 - ?
unsigned IsExternal : 1;
public:
private: // MCContext creates and uniques these.
friend class MCContext;
MCSymbol(const char *_Name, bool _IsTemporary)
: Section(0), Name(_Name), IsTemporary(_IsTemporary), IsExternal(false) {}
: Name(_Name), Section(0), IsTemporary(_IsTemporary), IsExternal(false) {}
public:
MCSection *getSection() const { return Section; }
void setSection(MCSection *Value) { Section = Value; }