[GHC] #2988: Improve float-in

[GHC]

#2988: Improve float-in
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        Reporter:  simonpj           |                Owner:
            Type:  task              |               Status:  new
        Priority:  lowest            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  6.10.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 If you're taking this on, see also #11197, which will likely be fixed by
 improvements to floating-in. I don't think either of these bugs is
 dependent on the other exactly, but it would probably be easy to fix them
 both at the same time.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2988#comment:15>
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