#ifndef LLVM_MC_MCSECTION_H
#define LLVM_MC_MCSECTION_H
-#include <string>
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/SectionKind.h"
+#include "llvm/Support/Casting.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 {
+ public:
+ enum SectionVariant {
+ SV_COFF = 0,
+ SV_ELF,
+ SV_MachO
+ };
+
+ private:
MCSection(const MCSection&); // DO NOT IMPLEMENT
void operator=(const MCSection&); // DO NOT IMPLEMENT
protected:
- MCSection(SectionKind K) : Kind(K) {}
+ MCSection(SectionVariant V, SectionKind K) : Variant(V), Kind(K) {}
+ SectionVariant Variant;
SectionKind Kind;
public:
virtual ~MCSection();
SectionKind getKind() const { return Kind; }
-
+
+ SectionVariant getVariant() const { return Variant; }
+
virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS) const = 0;
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);
+ // UseCodeAlign - Return true if a .align directive should use
+ // "optimized nops" to fill instead of 0s.
+ virtual bool UseCodeAlign() const = 0;
- StringRef getName() const { return Name; }
- bool isDirective() const { return IsDirective; }
-
- virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
- raw_ostream &OS) const;
+ /// isVirtualSection - Check whether this section is "virtual", that is
+ /// has no actual object file contents.
+ virtual bool isVirtualSection() const = 0;
+
+ static bool classof(const MCSection *) { return true; }
};
-
+
} // end namespace llvm
#endif