Rearrange vars and make comments more obvious.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169780 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 1125a94..23f95e3 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -309,13 +309,15 @@
   // table for the same directory as DW_at_comp_dir.
   StringRef CompilationDir;
 
-  // Holders for the various debug information flags that we might need to
-  // have exposed. See accessor functions below for description.
-  bool IsDarwinGDBCompat;
-
   // Counter for assigning globally unique IDs for CUs.
   unsigned GlobalCUIndexCount;
 
+  // Holders for the various debug information flags that we might need to
+  // have exposed. See accessor functions below for description.
+
+  // Whether or not we're emitting info for older versions of gdb on darwin.
+  bool IsDarwinGDBCompat;
+
   // DWARF5 Experimental Options
   bool HasDwarfAccelTables;
   bool HasSplitDwarf;