[GHC] #11261: Implement DWARF debugging on powerpc64

[GHC]

#11261: Implement DWARF debugging on powerpc64
-------------------------------------+-------------------------------------
           Reporter:  trommler       |             Owner:  trommler
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.2.1
          Component:  Compiler       |           Version:  7.11
  (CodeGen)                          |
           Keywords:                 |  Operating System:  Linux
       Architecture:  powerpc64      |   Type of failure:  Incorrect result
                                     |  at runtime
          Test Case:  debug, T10667  |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 debug:
 {{{
 ghc-stage2: panic! (the 'impossible' happened)
   (GHC version 7.11.20151219 for powerpc64-unknown-linux):
         dwarfReturnRegNo: Unsupported platform!
 CallStack (from ImplicitParams):
   error, called at compiler/nativeGen/Dwarf/Constants.hs:224:19 in
 ghc:Dwarf.Constants

 Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
 }}}

 Provide DWARF constants for registers.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11261>
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