[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:  simonmar
            Type:  bug               |           Status:  new
        Priority:  highest           |        Milestone:  7.8.1
       Component:  Compiler (NCG)    |          Version:  7.7
      Resolution:                    |         Keywords:  ncg, codegen
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  Compile-time      |       Difficulty:  Unknown
  crash                              |       Blocked By:  7573
       Test Case:                    |  Related Tickets:  #7571,#7534,
  codeGen/should_compile/T7574       |  #7814
        Blocking:                    |
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Comment (by Simon Marlow <marlowsd@…>):

 In [changeset:491551db7dd97454c51b57f1675a74626875e5c3/testsuite]:
 {{{
 #!CommitTicketReference repository="testsuite"
 revision="491551db7dd97454c51b57f1675a74626875e5c3"
 T7574 is now passing (#7574)
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7574#comment:29>
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