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//===- 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 "llvm/ADT/StringRef.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Support/Compiler.h"
namespace llvm {
class MCAsmInfo;
class MCContext;
class MCExpr;
class MCSymbol;
class raw_ostream;
/// 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 {
public:
enum SectionVariant { SV_COFF = 0, SV_ELF, SV_MachO };
private:
MCSection(const MCSection &) = delete;
void operator=(const MCSection &) = delete;
MCSymbol *Begin;
mutable MCSymbol *End;
protected:
MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin)
: Begin(Begin), End(nullptr), Variant(V), Kind(K) {}
SectionVariant Variant;
SectionKind Kind;
public:
virtual ~MCSection();
SectionKind getKind() const { return Kind; }
SectionVariant getVariant() const { return Variant; }
MCSymbol *getBeginSymbol() const { return Begin; }
MCSymbol *getEndSymbol(MCContext &Ctx) const;
bool hasEnded() const;
virtual void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS,
const MCExpr *Subsection) const = 0;
/// Return true if a .align directive should use "optimized nops" to fill
/// instead of 0s.
virtual bool UseCodeAlign() const = 0;
/// Check whether this section is "virtual", that is has no actual object
/// file contents.
virtual bool isVirtualSection() const = 0;
};
} // end namespace llvm
#endif
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