Make EmitAbsValue an static helper.

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

diff --git a/include/llvm/MC/MCSection.h b/include/llvm/MC/MCSection.h
index 341f7f01514441b0c51f2fb9cd729ca113635b15..de2678adad61c19bd793495e3d2c90ce9c92d1ed 100644 (file)
--- a/include/llvm/MC/MCSection.h
+++ b/include/llvm/MC/MCSection.h
@@ -6,21 +6,72 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// This file declares the MCSection class.
+//
+//===----------------------------------------------------------------------===//
 
 #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 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;
+  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(SectionVariant V, SectionKind K) : Variant(V), Kind(K) {}
+    SectionVariant Variant;
+    SectionKind Kind;
   public:
-    MCSection(const char *_Name) : Name(_Name) {}
+    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;
 
-    const std::string &getName() const { return Name; }
+    /// isVirtualSection - Check whether this section is "virtual", that is
+    /// has no actual object file contents.
+    virtual bool isVirtualSection() const = 0;
   };
 
 } // end namespace llvm