[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:
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:  8.2.1
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Mikolaj reported that he was seeing significantly different code generated
 in the case of a manual `INLINE` versus manually inlining. I haven't
 looked into what the cause it and this isn't necessarily problematic; this
 is just a reminder to look into what is happening.

 See
 https://github.com/LambdaHack/LambdaHack/blob/97724fe8c73e80b329ddf326a8eb001020870b2d/Game/LambdaHack/Common/Color.hs#L99.

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