[GHC] #14137: Do more inlining into non-recursive join points

GHC ghc-devs at haskell.org
Fri Aug 18 23:37:51 UTC 2017


#14137: Do more inlining into non-recursive join points
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        Reporter:  simonpj           |                Owner:  nomeata
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 > So if I use isJoinId, won’t this delay the effect of the patch to the
 first run off the occurrence analyser after a simplifier run

 True.  And in fact `willBeJoinId` is simpler than I thought, so probably
 ok.

 But you'll need to ensure that you pass a occ-anal-tagged binder to
 `occAnalNonRecRhs`.   And that in turn means you need to pass a tagged
 binder to `occAnalUnfolding` (not currently done) and `occAnalRules`
 (currently done).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14137#comment:7>
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