message: Don't force RETURN_PLACE to stack
  Speeds up simple-raytracer by 7% (cc
diff: @@ -15,8 +15,6 @@ pub fn analyze(fx: &FunctionCx<'_, '_, impl Backend>) -> HashMap<Local, Flags> {
  flag_map.insert(local, Flags::empty());
  }
  - not_ssa(&mut flag_map, RETURN_PLACE);
  -
  for (local, local_decl) in fx.mir.local_decls.iter_enumerated() {
  if fx.clif_type(local_decl.ty).is_none() {
  not_ssa(&mut flag_map, local);
  