> A later pass (machdep) relies on the notes, so the fact that the actual > register liveness no longer matches what the REG_DEAD notes imply seems to > be a problem.
Again, if a pass consumes these notes, it must df_note_add_problem() on entry. For machine_reorg, this is too late because the CFG has been destroyed so it very likely needs to use a trick akin to that of the generic reorg pass in rest_of_pass_free_cfg. -- Eric Botcazou
