DWARF: Generate the address lookup table from the DIE tree if .debug_aranges is not available.

Ported from LLDB.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139732 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/DebugInfo/DWARFCompileUnit.h b/lib/DebugInfo/DWARFCompileUnit.h
index 0c082ad..378b6ce 100644
--- a/lib/DebugInfo/DWARFCompileUnit.h
+++ b/lib/DebugInfo/DWARFCompileUnit.h
@@ -91,6 +91,11 @@
       DieArray.reserve(getDebugInfoSize() / 14);
     DieArray.push_back(die);
   }
+
+  void clearDIEs(bool keep_compile_unit_die);
+
+  void buildAddressRangeTable(DWARFDebugAranges *debug_aranges,
+                              bool clear_dies_if_already_not_parsed);
 };
 
 }