[GHC] #8971: Native Code Generator for 7.8 is not as optimized as 7.6.3...

[GHC]

#8971: Native Code Generator for 7.8 is not as optimized as 7.6.3...
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        Reporter:  GordonBGood       |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (NCG)    |              Version:  7.8.1-rc2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by GordonBGood):

 This bug has not been assigned to GHC Milestone 8.2 so I don't suppose any
 action will be taken on it.  I just checked with GHC 8.0.1 and the problem
 is still there, with the NCG produced code for these type of tight loops
 running about four times slower with x86 code than for x64 code.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8971#comment:27>
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