[GHC] #12603: INLINE and manually inlining produce different code

[GHC]

#12603: INLINE and manually inlining produce different code
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        Reporter:  bgamari           |                Owner:  bgamari
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by MikolajKonarski):

 Now on the branch https://github.com/LambdaHack/LambdaHack/tree/ghc-
 bug-12603 the manually inlined code is 3 times faster than the code with
 INLINE. I tried creating a small example by starting just with the
 offending module and Main.hs with a loop, but it's not enough, so I gave
 up for now.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12603#comment:3>
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