[GHC] #7534: allocateRegsAndSpill: Cannot read from uninitialized register

[GHC]

#7534: allocateRegsAndSpill: Cannot read from uninitialized register
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    Reporter:  erikd      |       Owner:  simonmar           
        Type:  bug        |      Status:  new                
    Priority:  normal     |   Milestone:                     
   Component:  Compiler   |     Version:  7.7                
    Keywords:             |          Os:  Linux              
Architecture:  powerpc64  |     Failure:  Building GHC failed
  Difficulty:  Unknown    |    Testcase:                     
   Blockedby:             |    Blocking:                     
     Related:             |  
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Changes (by erikd):

  * status:  infoneeded => new


Comment:

 I added -ddump-cmm to the command line of the compile that was failing and
 saved the output to a file. Unfortunately there is no sign on the
 uninitialized register %vI_na5b in the dumped file.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7534#comment:9>
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