message: Don't add stack_addr intructions to prelude
  Speeds up simple-raytracer by 30% (cc
  Also reduces the size of the simple-raytracer binary from 9.2MB to 8.6MB
diff: @@ -423,8 +423,7 @@ fn local_place<'tcx>(
  }
  }
  - // Take stack_addr in advance to avoid many duplicate instructions
  - CPlace::for_addr(place.to_addr(fx), layout)
  + place
  };
  let prev_place = fx.local_map.insert(local, place);
  