[GHC] #11564: Possible overzealous unfolding

[GHC]

#11564: Possible overzealous unfolding
-------------------------------------+-------------------------------------
        Reporter:  simonmar          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1900
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by simonmar):

 * owner:  simonpj =>
 * status:  merge => new


Comment:

 I reverted the change, because it caused perf test regressions (that were
 apparently not reported by Travis):
 https://perf.haskell.org/ghc/#revision/51a33924fc118d9b6c1db556c75c0d010ef95e18

 {{{
 tests/alloc/T3064       297834384       + 3.18%         307311896
 bytes
 tests/alloc/T5631       1164415992      + 108.27%       2425081664
 bytes
 tests/alloc/T7257       1654893352      - 14.50%        1414893352
 bytes
 tests/alloc/T783        489042024       + 3.47%         505987776
 bytes
 tests/alloc/T9020       703211744       + 16.45%        818924416
 bytes
 tests/alloc/T9872d      535824528       + 3.09%         552399688
 bytes
 tests/alloc/T9961       731573736       + 5.10%         768861280
 bytes
 tests/alloc/haddock.Cabal       10472403176     + 4.52%
 10945830216     bytes
 tests/alloc/haddock.compiler    59679619080     + 4.56%
 62402376816     bytes
 }}}

 Need to investigate these before pushing.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11564#comment:6>
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