[GHC] #8847: Int64 ^ Int64 broken by optimization on SPARC

[GHC]

#8847: Int64 ^ Int64 broken by optimization on SPARC
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        Reporter:  kgardas                      |            Owner:
            Type:  bug                          |           Status:  new
        Priority:  normal                       |        Milestone:
       Component:  Compiler (NCG)               |          Version:
      Resolution:                               |         Keywords:
Operating System:  Solaris                      |     Architecture:  sparc
 Type of failure:  Incorrect result at runtime  |       Difficulty:
       Test Case:                               |  Unknown
        Blocking:  8816                         |       Blocked By:
                                                |  Related Tickets:
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Comment (by kgardas):

 {{{
 main = print ( 2 ^ 5 :: Int64 )
 }}}

 runs fine and returns correct result. The problem is with optimization of
 {{{2 ^ X, X > 5}}}. Also I've though the problem may be with a call to
 ghc-prim hs_timesInt64, but this call is also presented and used in {{{2 ^
 5}}} optimized version, so this does not seems like a culprit.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8847#comment:2>
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