> Again: Is this really the direction we should be going in? (I haven't > any better ideas...)
Do you mean for self-referencing notes? If so, definitely, these notes are either wrong or almost always redundant so we should eliminate them. As for the more general problem of REG_EQ* notes, perhaps it's time to devise a global infrastructure to handle them. But, as far as I recall, they always have been problematic, before or after the DF merge. -- Eric Botcazou