[GHC] #4470: Loop optimization: identical counters

[GHC]

#4470: Loop optimization: identical counters
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              Reporter:  choenerzs   |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:  7.10.1
              Priority:  normal      |          Version:
             Component:  Compiler    |         Keywords:  loop optimization
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Runtime     |  Related Tickets:
  performance bug                    |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by choenerzs):

 It is (afaik) more than just slightly related. However, the (wanted)
 solutions are different. Flow fusion works within the limited context of
 repa by using a different intermediate system. Here, I'd like a more
 general solution -- since we can't express everything in terms of repa or
 even vector.

 On the other hand, I think it will be more complicated to get this done on
 the GHC side -- though the solution might be very worthwhile given the
 comments above.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4470#comment:13>
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