[GHC] #13513: Incorrect behavior on arm64 with optimisations

[GHC]

#13513: Incorrect behavior on arm64 with optimisations
-------------------------------------+-------------------------------------
        Reporter:  achirkin          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  aarch64
 Type of failure:  Incorrect result  |            Test Case:
  at runtime                         |
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by erikd):

 I used to have access to an aarch64 machine (via ssh across the Pacific)
 but unfortunately, do not any more. Happy to be CCed and offer whatever
 help I can.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13513#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler