[GHC] #14677: Code generator does not correctly tag a pointer

GHC ghc-devs at haskell.org
Fri Jan 4 18:19:31 UTC 2019


#14677: Code generator does not correctly tag a pointer
-------------------------------------+-------------------------------------
        Reporter:  simonpj           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  CodeGen
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:  15155             |             Blocking:  14626
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by heisenbug):

 Replying to [comment:30 simonpj]:
 > Great.  So I think we now agree that the IND_STATIC patch is about (a)
 code size  and (b) performance; and that both are very small (albeit
 worthwhile) improvements.  ''It is not about correctness''.  OK so far?

 Agree, we may have different definitions of "correct". No crashes. Yep.

 >
 > When you say "your patch", what do you mean?
 >

 This one:
 https://ghc.haskell.org/trac/ghc/attachment/ticket/14677/lf-imported-patch

 Applying this causes crashes. #15155 helps with that. #16039 helps more.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14677#comment:31>
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