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

[GHC]

#8847: Int64 ^ Int64 broken by optimization on SPARC
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       Reporter:          |             Owner:
  kgardas                 |            Status:  new
           Type:  bug     |         Milestone:
       Priority:  normal  |           Version:
      Component:          |  Operating System:  Solaris
  Compiler (NCG)          |   Type of failure:  Incorrect result at runtime
       Keywords:          |         Test Case:
   Architecture:  sparc   |          Blocking:
     Difficulty:          |
  Unknown                 |
     Blocked By:          |
Related Tickets:          |
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 The T7507 test is broken on SPARC NCG, I've more simplified it to
 {{{
 module Main where

 import Data.Int

 main = print ( ( 2 :: Int64 ) ^ ( 6 :: Int64 ) )
 }}}
 it does not matter if it's run with two Int64 or just with one:
 {{{
 main = print ( 2 ^ 6 :: Int64 )
 }}}
 the result with -O is still 0. The result without -O is correct.

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