[GHC] #9281: Rewrite `integer-gmp` to use only non-allocating GMP functions

[GHC]

#9281: Rewrite `integer-gmp` to use only non-allocating GMP functions
-------------------------------------+-------------------------------------
              Reporter:  hvr         |            Owner:  hvr
                  Type:  task        |           Status:  patch
              Priority:  normal      |        Milestone:  7.10.1
             Component:  libraries   |          Version:
  (other)                            |         Keywords:  integer-gmp
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:  #8647
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D82    |
-------------------------------------+-------------------------------------

Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:"96d04186e00fe2202b9953688492bb370d818bf1/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="96d04186e00fe2202b9953688492bb370d818bf1"
 Remove obsolete `digitsTyConKey :: Unique`

 This became dead with 1e87c0a6e485e1dbef8e9ed19191e54f6cdc54e0
 and was probably just missed.

 I plan to re-use the freed up `mkPreludeTyConUnique 23` slot soon
 for a new `bigNatTyConKey` (as part of the #9281 effort)
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9281#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler