Remove yet another method of creating begin and end symbol for sections.

[oota-llvm.git] / include / llvm / MC / MCSection.h

diff --git a/include/llvm/MC/MCSection.h b/include/llvm/MC/MCSection.h
index bdc46be11d5d2527f8193c7ca4e63cd362a62c80..55270a5f9ef2e3eafd506f128a690306c6c08b08 100644 (file)
--- a/include/llvm/MC/MCSection.h
+++ b/include/llvm/MC/MCSection.h
@@ -14,47 +14,63 @@
 #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;
-  
-  /// 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 {
-    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;
-    
-    MCSection(const MCSection&);      // DO NOT IMPLEMENT
-    void operator=(const MCSection&); // DO NOT IMPLEMENT
-  protected:
-    MCSection(const StringRef &Name, bool IsDirective, SectionKind K,
-              MCContext &Ctx);
-    SectionKind Kind;
-  public:
-    virtual ~MCSection();
-
-    static MCSection *Create(const StringRef &Name, bool IsDirective, 
-                             SectionKind K, MCContext &Ctx);
-    
-    const std::string &getName() const { return Name; }
-    bool isDirective() const { return IsDirective; }
-    
-    SectionKind getKind() const { return Kind; }
-  };
-
-  
-  typedef MCSection MCSectionELF;
-  
+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;
+
+  mutable 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; }
+  void setBeginSymbol(MCSymbol *Sym) const {
+    assert(!Begin);
+    Begin = Sym;
+  }
+  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