[GHC] #8091: retry# lacks strictness information

[GHC]

#8091: retry# lacks strictness information
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       Reporter:  parcs             |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:
      Component:  Compiler          |           Version:  7.6.3
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 The `retry#` primop should be marked as returning bottom since it never
 actually returns anything as far as the simplifier is concerned. This
 change would help the simplifier eliminate unreachable code inside STM
 transactions.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8091>
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