ific symbol.
  -objects                  Dump the details of LTO objects.
  -callgraph                Dump the callgraph in graphviz format.
  -type-stats               Dump statistics of tree types.
  -tree-stats               Dump statistics of trees.
  -gimple-stats             Dump statistics of gimple statements.
  -dump-body=               Dump the specific gimple body.
  -dump-level=              Deciding the optimization level of body.
  -help                     Display the dump tool help.
