switch MCSectionCOFF from a syntactic to semantic representation,

patch by Peter Housel!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103267 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCSectionCOFF.h

@@ -0,0 +1,83 @@
+//===- MCSectionCOFF.h - COFF Machine Code Sections -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the MCSectionCOFF class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCSECTIONCOFF_H
+#define LLVM_MC_MCSECTIONCOFF_H
+
+#include "llvm/MC/MCSection.h"
+
+namespace llvm {
+  
+/// MCSectionCOFF - This represents a section on Windows
+  class MCSectionCOFF : public MCSection {
+    // The memory for this string is stored in the same MCContext as *this.
+    StringRef SectionName;
+    
+    /// Flags - This is the Characteristics field of a section, drawn
+    /// from the enums below.
+    unsigned Flags;
+
+  private:
+    friend class MCContext;
+    MCSectionCOFF(StringRef Section, unsigned flags, SectionKind K)
+      : MCSection(K), SectionName(Section), Flags(flags) {
+    }
+    ~MCSectionCOFF();
+
+  public:
+    /// ShouldOmitSectionDirective - Decides whether a '.section' directive
+    /// should be printed before the section name
+    bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
+
+    /// Valid section flags.
+    enum {
+      IMAGE_SCN_TYPE_NO_PAD                     = 0x00000008,
+      IMAGE_SCN_CNT_CODE                        = 0x00000020,
+      IMAGE_SCN_CNT_INITIALIZED_DATA            = 0x00000040,
+      IMAGE_SCN_CNT_UNINITIALIZED_DATA          = 0x00000080,
+      IMAGE_SCN_LNK_OTHER                       = 0x00000100,
+      IMAGE_SCN_LNK_INFO                        = 0x00000200,
+      IMAGE_SCN_LNK_REMOVE                      = 0x00000800,
+      IMAGE_SCN_LNK_COMDAT                      = 0x00001000,
+      IMAGE_SCN_MEM_FARDATA                     = 0x00008000,
+      IMAGE_SCN_MEM_PURGEABLE                   = 0x00020000,
+      IMAGE_SCN_MEM_16BIT                       = 0x00020000,
+      IMAGE_SCN_MEM_LOCKED                      = 0x00040000,
+      IMAGE_SCN_MEM_PRELOAD                     = 0x00080000,
+      IMAGE_SCN_ALIGN_1BYTES                    = 0x00100000,
+      IMAGE_SCN_ALIGN_2BYTES                    = 0x00200000,
+      IMAGE_SCN_ALIGN_4BYTES                    = 0x00300000,
+      IMAGE_SCN_ALIGN_8BYTES                    = 0x00400000,
+      IMAGE_SCN_ALIGN_16BYTES                   = 0x00500000,
+      IMAGE_SCN_ALIGN_32BYTES                   = 0x00600000,
+      IMAGE_SCN_ALIGN_64BYTES                   = 0x00700000,
+      IMAGE_SCN_LNK_NRELOC_OVFL                 = 0x01000000,
+      IMAGE_SCN_MEM_DISCARDABLE                 = 0x02000000,
+      IMAGE_SCN_MEM_NOT_CACHED                  = 0x04000000,
+      IMAGE_SCN_MEM_NOT_PAGED                   = 0x08000000,
+      IMAGE_SCN_MEM_SHARED                      = 0x10000000,
+      IMAGE_SCN_MEM_EXECUTE                     = 0x20000000,
+      IMAGE_SCN_MEM_READ                        = 0x40000000,
+      IMAGE_SCN_MEM_WRITE                       = 0x80000000
+    };
+
+    StringRef getSectionName() const { return SectionName; }
+    unsigned getFlags() const { return Flags; }
+    
+    virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
+                                      raw_ostream &OS) const;
+  };
+
+} // end namespace llvm
+
+#endif