[GHC] #9476: Implement late lambda-lifting

[GHC]

#9476: Implement late lambda-lifting
-------------------------------------+-------------------------------------
        Reporter:  simonpj           |                Owner:  sgraf
            Type:  feature request   |               Status:  closed
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  7.8.2
      Resolution:  fixed             |             Keywords:  LateLamLift
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8763 #13286      |  Differential Rev(s):  Phab:D5224
       Wiki Page:  LateLamLift       |
-------------------------------------+-------------------------------------

Comment (by sgraf):

 I already wrote something down in [https://github.com/sgraf812/late-lam-
 lift/blob/master/paper.pdf section 4 here]. Table 2 turns off closure
 growth, in particular. The results are fairly inconclusive, but I argue
 that we want to avoid arbitrary increases in allocations in order to stay
 predictable.
 For example `wheel-sieve1`, with a nearly 30% increase in allocation, had
 an increase in residency by 5.7%. I imagine that there are programs that
 could trigger some exponential worst case.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9476#comment:73>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler