[GHC] #16354: LLVM Backend generates invalid assembly.

[GHC]

#16354: LLVM Backend generates invalid assembly.
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        Reporter:  AndreasK          |                Owner:  (none)
            Type:  bug               |               Status:  upstream
        Priority:  high              |            Milestone:
       Component:  Compiler (LLVM)   |              Version:  8.9
      Resolution:                    |             Keywords:  CodeGen
Operating System:  Windows           |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by AndreasK):

 Going by the answers upstream our options are:
 * Switch to the llvm assembler llvm-mc for the llvm backend.
 * Hope binutils implements the llvm extensions eventually.
 * Go back to LLVM 6

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16354#comment:8>
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