[GHC] #10332: AArch64 : divbyzero test fails

[GHC]

#10332: AArch64 : divbyzero test fails
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        Reporter:  erikd             |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:  aarch64
 Type of failure:  Incorrect result  |               Test Case:
  at runtime                         |  testsuite/tests/rts/divbyzero.hs
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by rwbarton):

 I think it's okay for `divInt` by 0 to be undefined behavior, it's an
 undocumented, internal function used to define `div`, which does check
 whether the divisor is 0.

 I would suggest disabling the test when the LLVM backend is in use, like
 in the test above it `derefnull`. In fact I think even on x86_64 Linux
 with LLVM it works only due to the luck that `divInt#` is too large to
 inline; if I call `quotInt#` directly from the test, it prints some large
 number instead.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10332#comment:1>
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