[GHC] #8974: 64 bit windows executable built with ghc-7.9.20140405+LLVM segfaults

[GHC]

#8974: 64 bit windows executable built with ghc-7.9.20140405+LLVM segfaults
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        Reporter:  awson            |            Owner:
            Type:  bug              |           Status:  new
        Priority:  high             |        Milestone:  7.8.2
       Component:  Compiler (LLVM)  |          Version:  7.9
      Resolution:                   |         Keywords:
Operating System:  Windows          |     Architecture:  x86_64 (amd64)
 Type of failure:  Runtime crash    |       Difficulty:  Unknown
       Test Case:                   |       Blocked By:
        Blocking:                   |  Related Tickets:
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Comment (by awson):

 To make Cmm shorter I've separated segfaulting code from `main` (it still
 segfaults when called from `main`) thus:
 {{{
 -- T8947.hs
 module T8947 where

 import System.Mem (performMajorGC)

 t8947 :: IO ()
 t8947 = performMajorGC >> putStrLn "Done"
 }}}

 `T8947_LLVMCG_cmm` `T8947.ll` are produced by `ghc -O2 -pgmlo opt -pgmlc
 llc -fllvm -keep-llvm-files -ddump-cmm -c T8947.hs > T8947_LLVMCG_cmm`.
 `T8947_NCG_cmm` is produced by `ghc -O2 -ddump-cmm -c T8947.hs >
 T8947_NCG_cmm`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8974#comment:4>
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