[GHC] #9370: unfolding info as seen when building a module depends on flags in a previously-compiled module

[GHC]

#9370: unfolding info as seen when building a module depends on flags in a
previously-compiled module
-------------------------------------+-------------------------------------
        Reporter:  carter            |                Owner:  richardfung
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.8.3
      Resolution:                    |             Keywords:  newcomer,
                                     |  Inlining
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #8635             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by richardfung):

 Unless someone has a strong preference otherwise I'm inclined to go with
 the easier solution of comparing against a hard coded -ddump-inlinings
 output. I don't think I'd be able to manage the more complicated test
 without help and I'm not convinced it's worth the extra effort especially
 if we're already doing things the simpler way elsewhere.

 Where should these tests go though?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9370#comment:32>
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