[GHC] #15449: Nondeterministic Failure on aarch64 with -jn, n > 1

[GHC]

#15449: Nondeterministic Failure on aarch64 with -jn, n > 1
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        Reporter:  tmobile           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Linux             |         Architecture:  aarch64
 Type of failure:  Compile-time      |            Test Case:
  crash or panic                     |
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by tmobile):

 Ah, that makes sense. The same section of that same LLVM page says
 "SequentiallyConsistent operations may not be reordered," but there could
 be issues if ordinary loads/stores float over `seq_cst` atomic
 loads/stores, could there not?

 Still curious about the absence of `store atomic`.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15449#comment:11>
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