Add the source language into the compile unit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151143 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
index fe65927..4e63c3f 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
@@ -36,6 +36,10 @@
   ///
   unsigned ID;
 
+  /// Language - The DW_AT_language of the compile unit
+  ///
+  unsigned Language;
+
   /// Die - Compile unit debug information entry.
   ///
   const OwningPtr<DIE> CUDie;
@@ -76,11 +80,12 @@
   DenseMap<DIE *, const MDNode *> ContainingTypeMap;
 
 public:
-  CompileUnit(unsigned I, DIE *D, AsmPrinter *A, DwarfDebug *DW);
+  CompileUnit(unsigned I, unsigned L, DIE *D, AsmPrinter *A, DwarfDebug *DW);
   ~CompileUnit();
 
   // Accessors.
   unsigned getID()                  const { return ID; }
+  unsigned getLanguage()            const { return Language; }
   DIE* getCUDie()                   const { return CUDie.get(); }
   const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; }