[Bug target/68910] [5/6 regression] huge stack frame and poor code with instruction scheduling at -O2

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68910

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|sparc-rtems                 |sparc-*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-12-16
                 CC|                            |ebotcazou at gcc dot gnu.org
   Target Milestone|---                         |5.4
            Summary|SPARC/cypress: Poor code    |[5/6 regression] huge stack
                   |generation, huge stack      |frame and poor code with
                   |frame                       |instruction scheduling at
                   |                            |-O2
     Ever confirmed|0                           |1

--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This looks like a spilling avalanche due to the first scheduling pass, so
either -fno-schedule-insns or -mtune=v7 (for cypress) or -mtune=v8 (for leon3)
can be passed to work around it.