1 //===- MCSection.h - Machine Code Sections ----------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the MCSection class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_MC_MCSECTION_H
15 #define LLVM_MC_MCSECTION_H
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/MC/SectionKind.h"
19 #include "llvm/Support/Compiler.h"
28 /// Instances of this class represent a uniqued identifier for a section in the
29 /// current translation unit. The MCContext class uniques and creates these.
32 enum SectionVariant { SV_COFF = 0, SV_ELF, SV_MachO };
35 MCSection(const MCSection &) = delete;
36 void operator=(const MCSection &) = delete;
38 mutable MCSymbol *Begin;
39 mutable MCSymbol *End;
42 MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin)
43 : Begin(Begin), End(nullptr), Variant(V), Kind(K) {}
44 SectionVariant Variant;
50 SectionKind getKind() const { return Kind; }
52 SectionVariant getVariant() const { return Variant; }
54 MCSymbol *getBeginSymbol() const { return Begin; }
55 void setBeginSymbol(MCSymbol *Sym) const {
59 MCSymbol *getEndSymbol(MCContext &Ctx) const;
60 bool hasEnded() const;
62 virtual void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS,
63 const MCExpr *Subsection) const = 0;
65 /// Return true if a .align directive should use "optimized nops" to fill
67 virtual bool UseCodeAlign() const = 0;
69 /// Check whether this section is "virtual", that is has no actual object
71 virtual bool isVirtualSection() const = 0;
74 } // end namespace llvm