[GHC] #11717: Way to dump cmm only once

[GHC]

#11717: Way to dump cmm only once
-------------------------------------+-------------------------------------
        Reporter:  nomeata           |                Owner:  tvv
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
  (CodeGen)                          |
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2393
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by tvv):

 * differential:   => Phab:D2393


--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11717#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler