[GHC] #14669: 32-bit binaries sometimes throw a stack overflow on shutdown.

[GHC]

#14669: 32-bit binaries sometimes throw a stack overflow on shutdown.
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        Reporter:  sergv           |                Owner:  (none)
            Type:  bug             |               Status:  infoneeded
        Priority:  normal          |            Milestone:
       Component:  Runtime System  |              Version:  8.2.1
      Resolution:                  |             Keywords:
Operating System:  Windows         |         Architecture:  x86
 Type of failure:  Runtime crash   |            Test Case:
      Blocked By:                  |             Blocking:
 Related Tickets:                  |  Differential Rev(s):
       Wiki Page:                  |
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Comment (by Phyx-):

 hmm, ok. Looking closer, the issue is that at `-O1` and higher the
 compiler notices the space isn't used. Because it's stack allocated it
 won't be valid outside the frame anyway so it correctly optimizes away the
 allocation.

 I have to wait till the weekend to look at it, but things to try if you
 wish:

  - try marking the function `volatile`;
  - try adding `__attribute__((optimize("O0")))` to the function to disable
 optimizations.

 Second one will probably work, but isn't very portable. so I'll likely go
 with inline assembly.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14669#comment:23>
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