[GHC] #7574: Register allocator chokes on certain branches with literals

[GHC]

#7574: Register allocator chokes on certain branches with literals
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        Reporter:  thoughtpolice                 |            Owner:
            Type:  bug                           |  thoughtpolice
        Priority:  highest                       |           Status:  new
       Component:  Compiler (NCG)                |        Milestone:  7.8.1
      Resolution:                                |          Version:  7.7
Operating System:  Unknown/Multiple              |         Keywords:  ncg,
 Type of failure:  Compile-time crash            |  codegen
       Test Case:  codeGen/should_compile/T7574  |     Architecture:
        Blocking:                                |  Unknown/Multiple
                                                 |       Difficulty:
                                                 |  Unknown
                                                 |       Blocked By:  7573
                                                 |  Related Tickets:
                                                 |  #7571,#7534
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Changes (by simonpj):

 * testcase:   => codeGen/should_compile/T7574


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7574#comment:20>
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