[GHC] #12877: Constant propagation with basic unboxed arithmetic instructions

[GHC]

#12877: Constant propagation with basic unboxed arithmetic instructions
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        Reporter:  hsyl20            |                Owner:  hsyl20
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      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:                    |
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Changes (by hsyl20):

 * owner:   => hsyl20


Comment:

 I have attached a small reproducing example. I have a patch for GHC to
 handle this specific case but I will extend it to other cases before
 publishing it for review.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12877#comment:1>
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