Debug Info: revert 178722 for now.

There is a difference for FORM_ref_addr between DWARF 2 and DWARF 3+.
Since Eric is against guarding DWARF 2 ref_addr with DarwinGDBCompat, we are
still in discussion on how to handle this.

The correct solution is to update our header to say version 4 instead of version
2 and update tool chains as well.

rdar://problem/13559431


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178806 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DIE.h b/lib/CodeGen/AsmPrinter/DIE.h
index 8d68fd5..c332aa2 100644
--- a/lib/CodeGen/AsmPrinter/DIE.h
+++ b/lib/CodeGen/AsmPrinter/DIE.h
@@ -336,7 +336,9 @@
 
     /// SizeOf - Determine size of debug information entry in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const {
+      return sizeof(int32_t);
+    }
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *E) { return E->getType() == isEntry; }