[GHC] #10329: ghc-7.10 is configured to use llvm-3.6 but only compiles with llvm-3.5

[GHC]

#10329: ghc-7.10 is configured to use llvm-3.6 but only compiles with llvm-3.5
-------------------------------------+-------------------------------------
        Reporter:  erikd             |                   Owner:
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:  7.10.2
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D856
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Comment (by erikd):

 The current `ghc-7.10` branch fails to build with `BuldFlavour = perf-
 llvm` due to:

 {{{
 !0 = metadata !{metadata !"top", i8* null}
 }}}

 which is a direct result of the issue in this ticket and which the patch
 in Phab:D856 fixes.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10329#comment:3>
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