[GHC] #8272: testing if SpLim=$rbp and Sp=$rsp changed performance at all

[GHC]

#8272: testing if SpLim=$rbp and Sp=$rsp changed performance at all
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        Reporter:  carter            |                Owner:  carter
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.7
      Resolution:                    |             Keywords:
                                     |  callingConvention
Operating System:  Unknown/Multiple  |         Architecture:  x86_64
 Type of failure:  Runtime           |  (amd64)
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 In my view (1) is really the more interesting change as it enables use of
 native profiling tools. Currently we are essentially unable to use
 systems' native profiling tools to collect callstacks (e.g. `perf record
 --callgraph`) since they generally assume that the callstack is tracked by
 `%rsp`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8272#comment:15>
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