global-jsx-tag-lowered-between-mutations.js — react Source File

Source Code

function Component(props) {
  const maybeMutable = new MaybeMutable();
  // NOTE: this will produce invalid output.
  // The HIR is roughly:
  //                                   ⌵ mutable range of `maybeMutable`
  // StoreLocal maybeMutable = ...     ⌝
  // t0 = LoadGlobal View              ⎮ <-- View is lowered inside this mutable range
  //                                         and thus gets becomes an output of this scope,
  //                                         gets promoted to temporary
  // t1 = LoadGlobal maybeMutate       ⎮
  // t2 = LoadLocal maybeMutable       ⎮
  // t3 = Call t1(t2)                  ⌟
  // t4 = Jsx tag=t0 props=[] children=[t3] <-- `t0` is an invalid tag
  return <View>{maybeMutate(maybeMutable)}</View>;
}