#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/Compiler.h"
namespace llvm {
- class MCContext;
- class TargetAsmInfo;
+ class MCAsmInfo;
+ class MCExpr;
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
+ public:
+ enum SectionVariant {
+ SV_COFF = 0,
+ SV_ELF,
+ SV_MachO
+ };
+
+ private:
+ MCSection(const MCSection&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCSection&) LLVM_DELETED_FUNCTION;
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; }
-
- virtual void PrintSwitchToSection(const TargetAsmInfo &TAI,
- raw_ostream &OS) const = 0;
- };
-
- class MCSectionELF : public MCSection {
- std::string 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;
-
- MCSectionELF(const StringRef &name, bool isDirective, SectionKind K)
- : MCSection(K), Name(name), IsDirective(isDirective) {
- }
- public:
-
- static MCSectionELF *Create(const StringRef &Name, bool IsDirective,
- SectionKind K, MCContext &Ctx);
+ SectionVariant getVariant() const { return Variant; }
- const std::string &getName() const { return Name; }
- bool isDirective() const { return IsDirective; }
-
-
- virtual void PrintSwitchToSection(const TargetAsmInfo &TAI,
- raw_ostream &OS) const;
- };
+ virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
+ raw_ostream &OS,
+ const MCExpr *Subsection) const = 0;
+
+ // Convenience routines to get label names for the beginning/end of a
+ // section.
+ virtual std::string getLabelBeginName() const = 0;
+ virtual std::string getLabelEndName() const = 0;
- class MCSectionCOFF : public MCSection {
- std::string 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(const StringRef &name, bool isDirective, SectionKind K)
- : MCSection(K), Name(name), IsDirective(isDirective) {
+ /// 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;
}
- public:
-
- static MCSectionCOFF *Create(const StringRef &Name, bool IsDirective,
- SectionKind K, MCContext &Ctx);
- const std::string &getName() const { return Name; }
- bool isDirective() const { return IsDirective; }
-
- virtual void PrintSwitchToSection(const TargetAsmInfo &TAI,
- raw_ostream &OS) const;
+ // UseCodeAlign - Return true if a .align directive should use
+ // "optimized nops" to fill instead of 0s.
+ virtual bool UseCodeAlign() const = 0;
+
+ /// isVirtualSection - Check whether this section is "virtual", that is
+ /// has no actual object file contents.
+ virtual bool isVirtualSection() const = 0;
};
-
+
} // end namespace llvm
#endif