X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FMC%2FMCSection.h;h=de2678adad61c19bd793495e3d2c90ce9c92d1ed;hb=f36437d945c9376ffbf71cfd43b48427f14cb218;hp=32238586fd66d85ae632271068ff6507e524852c;hpb=ed47a0409b187d5dcd2bddfd054326fc809d00ae;p=oota-llvm.git

diff --git a/include/llvm/MC/MCSection.h b/include/llvm/MC/MCSection.h
index 32238586fd6..de2678adad6 100644
--- a/include/llvm/MC/MCSection.h
+++ b/include/llvm/MC/MCSection.h
@@ -14,48 +14,66 @@
 #ifndef LLVM_MC_MCSECTION_H
 #define LLVM_MC_MCSECTION_H
 
-#include <string>
 #include "llvm/ADT/StringRef.h"
-
-// FIXME: HORRIBLE HACK: major layering violation to get an enum.
-#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/MC/SectionKind.h"
+#include "llvm/Support/Compiler.h"
 
 namespace llvm {
-  class MCContext;
-  
+  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 {
-    std::string Name;
-    MCSection(const MCSection&);      // DO NOT IMPLEMENT
-    void operator=(const MCSection&); // DO NOT IMPLEMENT
-  protected:
-    MCSection(const StringRef &Name, MCContext &Ctx);
   public:
-    virtual ~MCSection();
+    enum SectionVariant {
+      SV_COFF = 0,
+      SV_ELF,
+      SV_MachO
+    };
 
-    static MCSection *Create(const StringRef &Name, MCContext &Ctx);
-    
-    const std::string &getName() const { return Name; }
-  };
-
-  /// MCSectionWithKind - This is used by targets that use the SectionKind enum
-  /// to classify their sections.
-  class MCSectionWithKind : public MCSection {
+  private:
+    MCSection(const MCSection&) LLVM_DELETED_FUNCTION;
+    void operator=(const MCSection&) LLVM_DELETED_FUNCTION;
+  protected:
+    MCSection(SectionVariant V, SectionKind K) : Variant(V), Kind(K) {}
+    SectionVariant Variant;
     SectionKind Kind;
-    MCSectionWithKind(const StringRef &Name, SectionKind K, MCContext &Ctx) 
-      : MCSection(Name, Ctx), Kind(K) {}
   public:
-    
-    static MCSectionWithKind *Create(const StringRef &Name, SectionKind K,
-                                     MCContext &Ctx);
+    virtual ~MCSection();
 
     SectionKind getKind() const { return Kind; }
+
+    SectionVariant getVariant() const { return Variant; }
+
+    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;
+
+    /// 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;
+    }
+
+    // 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