[Bug target/112426] sched1 pessimizes codegen on aarch64 by increasing register pressure

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112426

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> IIRC REG_DEADs are updated via df before IRA so they can be ignored here.

Yes see ira in ira.cc:
  df_note_add_problem ();

That will recompute the REG_DEAD (removing all old ones too).