[GHC] #9434: GHC.List.reverse does not fuse

GHC ghc-devs at haskell.org
Tue Aug 19 07:00:43 UTC 2014


#9434: GHC.List.reverse does not fuse
-------------------------------------+-------------------------------------
              Reporter:  dfeuer      |            Owner:
                  Type:  bug         |           Status:  patch
              Priority:  normal      |        Milestone:
             Component:              |          Version:  7.9
  libraries/base                     |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Easy (less than 1
  Unknown/Multiple                   |  hour)
       Type of failure:  Runtime     |       Blocked By:
  performance bug                    |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by simonpj):

 That looks helpful.  But allocation probably should never go up.  Do you
 know why it does so in constraints?

 I use `-ticky` a lot to track down these kind of things.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9434#comment:4>
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