[GHC] #14242: Ticks and join points don't play well

[GHC]

#14242: Ticks and join points don't play well
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.1
      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 Ben Gamari <ben@…>):

 In [changeset:"12a92fedf8b1997f2e26800929be117d54536b7e/ghc"
 12a92fed/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="12a92fedf8b1997f2e26800929be117d54536b7e"
 OccurAnal: Ensure SourceNotes don't interfere with join-point analysis

 In general ticks are problematic for join point analysis as described
 in #14242.  However, source notes are intended to be a best-effort
 annotation which shouldn't interfere with optimization. Special-case
 these to ensure that tail-call information is still correct, even in the
 presence of source note
 ticks.

 Test Plan: Validate

 Reviewers: simonpj, austin

 Reviewed By: simonpj

 Subscribers: rwbarton, thomie

 GHC Trac Issues: #14242

 Differential Revision: https://phabricator.haskell.org/D3978
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14242#comment:2>
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