Rearrange fields. NFC.

llvm-svn: 297967
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
index 6b16afa..9c5925e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
@@ -84,9 +84,9 @@
 /// entry.
 class DwarfExpression {
 protected:
-  unsigned DwarfVersion;
   /// Current Fragment Offset in Bits.
   uint64_t OffsetInBits = 0;
+  unsigned DwarfVersion;
 
   /// Sometimes we need to add a DW_OP_bit_piece to describe a subregister. 
   unsigned SubRegisterSizeInBits = 0;