[GHC] #16111: Inconsistent behavior of Data.Bits.shiftL with different optimization levels and -fllvm

[GHC]

#16111: Inconsistent behavior of Data.Bits.shiftL with different optimization
levels and -fllvm
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by harpocrates):

 Actually, given that Haskell report defines `shiftL` and `shiftR`,
 changing their types or deprecating them is definitely not a good idea...

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16111#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler