[GHC] #11676: Preserve name of original function in worker name

[GHC]

#11676: Preserve name of original function in worker name
-------------------------------------+-------------------------------------
           Reporter:  bgamari        |             Owner:
               Type:  feature        |            Status:  new
  request                            |
           Priority:  low            |         Milestone:
          Component:  Compiler       |           Version:  7.10.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Other
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 Currently it's not uncommon to find workers named, e.g., `$wa` while
 perusing Core. When you find one of these you need to then go searching
 for its associated wrapper to discover which function the worker
 implements. Then you need to work hard to keep this piece of information
 in your mental state. This is unfortunate and makes reading Core
 unnecessarily hard.

 Why not name the worker of `thisIsAFunction` something like, e.g.,
 `thisIsAFunction$wa`?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11676>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler