[GHC] #14281: Minor regressions from removal of non-linear behavior from simplifier

[GHC]

#14281: Minor regressions from removal of non-linear behavior from simplifier
-------------------------------------+-------------------------------------
           Reporter:  dfeuer         |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Compiler       |           Version:  8.2.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Compile-time
  Unknown/Multiple                   |  performance bug
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:  #13397
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 #13379 exposed non-linear behavior simplifying certain nested function
 applications. Simon PJ fixed that in
 a1b753e8b1475659440f524b3e66dfbea31c5787, and then made an adjustment in
 29d88ee173bc9b04245a33d5268dda032f5dc331. Gipeda revealed a couple of
 small regressions from this combination (I'm not sure which did what, but
 IIRC the second patch mostly fixed regressions in the first).

 {{{
 nofib/time/cryptarithm1   time increases 4.87% from 0.513s to 0.538s
 nofib/size/scs            code size increases  5.28% from 1224890 bytes to
 1289570 bytes
 }}}

 Note that there are a few comments on #13397 relating to these
 regressions.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14281>
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