[GHC] #7337: GHC does not generate great code for bit-level rotation

[GHC]

#7337: GHC does not generate great code for bit-level rotation
-------------------------------------+-------------------------------------
        Reporter:  bos               |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (NCG)    |              Version:  7.6.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by jberryman):

 For my uses (also hashing) a `uncheckedRotateL# :: Word# -> Int# -> Word#`
 would be sufficient.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7337#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler