[Bug target/64331] regcprop propagates registers noted as REG_DEAD

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64331

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-12-16
                 CC|                            |ebotcazou at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Right, RTL passes aren't required to maintain REG_DEAD/REG_UNUSED notes, it's
the job of the DF framework.  And this is not done automatically, the consumers
of the notes must request it by means of df_note_add_problem prior to calling
the DF analyzer.