llvm-6502/include/llvm/MC/MCSection.h
Chris Lattner 3d22513611 eliminate the magic AbsoluteDebugSectionOffsets MAI hook,
which is really a property of the section being referenced.
Add a predicate to MCSection to replace it.

Yay for reduction in magic.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100367 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-04 23:22:29 +00:00

81 lines
2.6 KiB
C++

//===- MCSection.h - Machine Code Sections ----------------------*- 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 MCSection class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCSECTION_H
#define LLVM_MC_MCSECTION_H
#include <string>
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/SectionKind.h"
namespace llvm {
class MCContext;
class MCAsmInfo;
class raw_ostream;
/// MCSection - Instances of this class represent a uniqued identifier for a
/// section in the current translation unit. The MCContext class uniques and
/// creates these.
class MCSection {
MCSection(const MCSection&); // DO NOT IMPLEMENT
void operator=(const MCSection&); // DO NOT IMPLEMENT
protected:
MCSection(SectionKind K) : Kind(K) {}
SectionKind Kind;
public:
virtual ~MCSection();
SectionKind getKind() const { return Kind; }
virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS) const = 0;
/// isBaseAddressKnownZero - Return true if we know that this section will
/// get a base address of zero. In cases where we know that this is true we
/// can emit section offsets as direct references to avoid a subtraction
/// from the base of the section, saving a relocation.
virtual bool isBaseAddressKnownZero() const {
return false;
}
};
class MCSectionCOFF : public MCSection {
// The memory for this string is stored in the same MCContext as *this.
StringRef Name;
/// IsDirective - This is true if the section name is a directive, not
/// something that should be printed with ".section".
///
/// FIXME: This is a hack. Switch to a semantic view of the section instead
/// of a syntactic one.
bool IsDirective;
MCSectionCOFF(StringRef name, bool isDirective, SectionKind K)
: MCSection(K), Name(name), IsDirective(isDirective) {
}
public:
static MCSectionCOFF *Create(StringRef Name, bool IsDirective,
SectionKind K, MCContext &Ctx);
StringRef getName() const { return Name; }
bool isDirective() const { return IsDirective; }
virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS) const;
};
} // end namespace llvm
#endif