[GHC] #14626: No need to enter a scrutinised value

GHC ghc-devs at haskell.org
Mon Jan 15 23:13:55 UTC 2018


#14626: No need to enter a scrutinised value
-------------------------------------+-------------------------------------
        Reporter:  heisenbug         |                Owner:  heisenbug
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  performance
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13861            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 >  (That would explain why I often get crashes when mixing -O0 and -O1)

 The strict-field unboxing choice should be made once and for all at the
 module declaring the data constructor. If client modules made a different
 choice there'd be chaos.  If you think that is happening can you
 demonstrate?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14626#comment:36>
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