[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:  7.8.3
       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):

 I think that things are pretty much explained in
 [http://git.haskell.org/ghc.git/blob/HEAD:/compiler/nativeGen/X86/Ppr.hs#l462
 native codegen code].

 But AFAIUI, when the relevant LLVM code was written, non-Windows binutils
 were already improved and that was not taken into account (Windows
 binutils are not fixable anyway in general).

 Then it looks `pprInfoTable`
 [http://git.haskell.org/ghc.git/blob/HEAD:/compiler/llvmGen/LlvmCodeGen/Ppr.hs#l111
 code] is the point we could try to rewrite things at.

 Unfortunately, at this point we are forced to "reverse engineer" what was
 [http://git.haskell.org/ghc.git/blob/HEAD:/compiler/llvmGen/LlvmCodeGen/Data.hs#l116
 done before, and it is tempting to intervene here], but it seems we can't
 intervene at this early stage because this can break things in contexts
 other than `pprInfoTable`'s one.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8974#comment:11>
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