[GHC] #4992: LLVM trashes registers for primitive calls

[GHC]

#4992: LLVM trashes registers for primitive calls
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    Reporter:  scpmw           |       Owner:  davidterei@…        
        Type:  bug             |      Status:  new                 
    Priority:  normal          |   Component:  Compiler (LLVM)     
     Version:  7.1             |    Keywords:                      
    Testcase:                  |   Blockedby:                      
          Os:  Linux           |    Blocking:                      
Architecture:  x86_64 (amd64)  |     Failure:  Runtime crash       
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Comment(by dterei):

 Looks good. Could you please attach a test case though.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4992#comment:1>
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