[GHC] #15578: Honour INLINE pragmas on 0-arity bindings

[GHC]

#15578: Honour INLINE pragmas on 0-arity bindings
-------------------------------------+-------------------------------------
        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15519            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by tdammers):

 Replying to [comment:7 simonpj]:
 > Great!  Can you also confirm that this change makes `test3` (described
 in comment:11 of #15519, under "Workarounds") work as fast as `test0`; and
 does so
 > * Without removing the INLINE pragma on `testGrammar`
 > * Without removing the other uses of `testGrammar1` in (say) `test1`

 Unfortunately, `test3` is still almost as slow as without the patch:

 {{{
 HEAD / test0
 377.779049
 HEAD / test1
 7812.787996
 HEAD / test3
 7996.584027
 patched / test0
 372.0234
 patched / test1
 7540.029795
 patched / test3
 7654.089574
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15578#comment:9>
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