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

[GHC]

#7574: Register allocator chokes on certain branches with literals
-------------------------------------+-------------------------------------
        Reporter:  thoughtpolice     |            Owner:  thoughtpolice
            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:                    |
-------------------------------------+-------------------------------------

Comment (by bos):

 This bug accounts for over 90% of the compilation failures in attempting
 to compile hackage with HEAD.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7574#comment:23>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler