[GHC] #14998: Sort out the strictness mess for exceptions

[GHC]

#14998: Sort out the strictness mess for exceptions
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        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.3
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  Exceptions
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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Comment (by simonpj):

 OK, well, let's declare victory on Item 4.   Maybe it was the `mask#`
 primops (which still have `strictArgDmd` that were delivering the payoff.

 Next up: item 2.  Could you remove the ! from the defns of
 `GHC.IO.catchException` and `catchAny`, and see if that has any perf
 impact?  (And validate.)

 I think they are unnecessary.

 Next: item 1. Could you make `catchRetry#` have `lazyApply1Dmd` like
 `catch#` and see if that has any effect?  If not, let's switch it.

 Thanks

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14998#comment:5>
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