[GHC] #13360: Add a flag to enable inferring HasCallStack constraints

[GHC]

#13360: Add a flag to enable inferring HasCallStack constraints
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        Reporter:  gridaphobe        |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 I think the best way to approach this would just be to run an experiment.
 Hack your suggested change into the compiler and measure the effect on
 real-world code. My suspicion is that this will show that performance
 regresses by approximately the same amount as `-fprof-auto -prof` since
 operationally the two approaches are somewhat similar.

 However, this does raise a question: What prevents you from just using
 cost center stacks?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13360#comment:32>
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