[GHC] #8033: add AVX register support to llvm calling convention

[GHC]

#8033: add AVX register support to llvm calling convention
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        Reporter:  carter            |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.7
      Resolution:                    |             Keywords:  SIMD
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by carter):

 sounds good to me :)

 might be worth doing 0-7  to have 8 rather than  only 6, but that would
 require ABI changes on the ghc side, though even this patch does too :)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8033#comment:33>
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