[GHC] #15569: Constant folding optimises 1 into 3

[GHC]

#15569: Constant folding optimises 1 into 3
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        Reporter:  snowleopard       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.6.1-beta1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #9136             |  Differential Rev(s):  Phab:D5109
       Wiki Page:                    |
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Comment (by snowleopard):

 Great job, ChaiTRex! This gives us some confidence. Could you, perhaps,
 generate a representative subset of all your tests that will be small
 enough to be added to the testsuite? For example, without iterating over
 different constants, yet still hitting each constant folding rule?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15569#comment:15>
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