[GHC] #9476: Implement late lambda-lifting

[GHC]

#9476: Implement late lambda-lifting
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        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       |
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Comment (by sgraf):

 Ah, just remembered that counted instructions were the original reason to
 look into this and with the NCG, cachegrind reports less instructions for
 `./allow-cg 17 +RTS -s -A128M -H1G` than for `./default 17 +RTS -s -A128M
 -H1G`. Compiling with `-fllvm -optlo -Os` works around this, so I'll try a
 benchmark run with that.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9476#comment:66>
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