message: Fix backend::lang_c::c_cfg_builder
diff: @@ -512,6 +512,7 @@ impl<'a> CCFGDataMap<'a> {
  MOpcode::OpLsr => Some(c_ast::Expr::Shr),
  MOpcode::OpLt => Some(c_ast::Expr::Lt),
  MOpcode::OpMod => Some(c_ast::Expr::Mod),
  + MOpcode::OpMov => None,
  MOpcode::OpMul => Some(c_ast::Expr::Mul),
  MOpcode::OpNot => Some(c_ast::Expr::Not),
  MOpcode::OpOr => Some(c_ast::Expr::Or),
  @@ -600,6 +601,11 @@ impl<'a> CCFGDataMap<'a> {
  }
  }
  MOpcode::OpCall => self.update_data_graph_by_call(ret_node, cfg),
  + MOpcode::OpMov => {
  + // ops[0] is forwarded to `ret_node`
  + let cfg_node = *self.var_map.get(&ops[0]).expect("This can not be `None`");
  + self.var_map.insert(ret_node, cfg_node);
  + }
  _ => unreachable!(),
  }
  }
  