introduce a section kind for common linkage. Use this to slightly

simplify and commonize some of the asmprinter logic for globals.

This also avoids printing the MCSection for .zerofill, which broke
the llvm-gcc build.

llvm-svn: 93843

1 files changed, 8 insertions, 1 deletions

diff --git a/llvm/include/llvm/MC/SectionKind.h b/llvm/include/llvm/MC/SectionKind.h
index 945cff790a4..f125d1578f2 100644
--- a/llvm/include/llvm/MC/SectionKind.h
+++ b/llvm/include/llvm/MC/SectionKind.h
@@ -87,6 +87,11 @@ class SectionKind {
     
            /// BSS - Zero initialized writeable data.
            BSS,
+    
+           /// Common - Data with common linkage.  These represent tentative
+           /// definitions, which always have a zero initializer and are never
+           /// marked 'constant'.
+           Common,
 
            /// DataRel - This is the most general form of data that is written
            /// to by the program, it can have random relocations to arbitrary
@@ -158,10 +163,11 @@ public:
   bool isThreadData() const { return K == ThreadData; } 
 
   bool isGlobalWriteableData() const {
-    return isBSS() || isDataRel() || isReadOnlyWithRel();
+    return isBSS() || isCommon() || isDataRel() || isReadOnlyWithRel();
   }
   
   bool isBSS() const { return K == BSS; }
+  bool isCommon() const { return K == Common; }
   
   bool isDataRel() const {
     return K == DataRel || K == DataRelLocal || K == DataNoRel;
@@ -207,6 +213,7 @@ public:
   static SectionKind getThreadBSS() { return get(ThreadBSS); }
   static SectionKind getThreadData() { return get(ThreadData); }
   static SectionKind getBSS() { return get(BSS); }
+  static SectionKind getCommon() { return get(Common); }
   static SectionKind getDataRel() { return get(DataRel); }
   static SectionKind getDataRelLocal() { return get(DataRelLocal); }
   static SectionKind getDataNoRel() { return get(DataNoRel); }