[Bug target/55666] Use scratch register to avoid save/restore of callee saved register

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55666

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-02-07
                 CC|                            |ramana at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
This looks like a case due to a different REG_ALLOC_ORDER for Thumb2 being set
up. HONOR_IRA_REGALLOC_ORDER and some of the changes which came there would be
where I would dig further.