[GHC] #10422: reorder in nativeCodeGen too slow

[GHC]

#10422: reorder in nativeCodeGen too slow
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        Reporter:  nomeata           |                   Owner:  nomeata
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
  (CodeGen)                          |                Keywords:
      Resolution:                    |            Architecture:
Operating System:  Unknown/Multiple  |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D893
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Comment (by Joachim Breitner <mail@…>):

 In [changeset:"8e4dc8fb63b8d3bfee485c1c830776f3ed704f4d/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8e4dc8fb63b8d3bfee485c1c830776f3ed704f4d"
 Greatly speed up nativeCodeGen/seqBlocks

 When working on #10397, I noticed that "reorder" in
 nativeCodeGen/seqBlocks took more than 60% of the time. With this
 refactoring, it does not even show up in the profile any more. This
 fixes #10422.

 Differential Revision: https://phabricator.haskell.org/D893
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10422#comment:2>
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