[GHC] #1405: Make ghc (stage1) be compilable by non-GHC

[GHC]

#1405: Make ghc (stage1) be compilable by non-GHC
-------------------------------------+-------------------------------------
        Reporter:  Isaac Dupree      |                   Owner:
            Type:  task              |                  Status:  closed
        Priority:  normal            |               Milestone:  ⊥
       Component:  Compiler          |                 Version:  6.6.1
      Resolution:  wontfix           |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"3452473b4bb180ba327520067b8c6f2a8d6c4f4b/ghc"
 3452473b/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="3452473b4bb180ba327520067b8c6f2a8d6c4f4b"
 Delete FastBool

 This reverses some of the work done in Trac #1405, and assumes GHC is
 smart enough to do its own unboxing of booleans now.

 I would like to do some more performance measurements, but the code
 changes can be reviewed already.

 Test Plan:
 With a perf build:
 ./inplace/bin/ghc-stage2 nofib/spectral/simple/Main.hs -fforce-recomp
 +RTS -t --machine-readable

 before:
 ```
   [("bytes allocated", "1300744864")
   ,("num_GCs", "302")
   ,("average_bytes_used", "8811118")
   ,("max_bytes_used", "24477464")
   ,("num_byte_usage_samples", "9")
   ,("peak_megabytes_allocated", "64")
   ,("init_cpu_seconds", "0.001")
   ,("init_wall_seconds", "0.001")
   ,("mutator_cpu_seconds", "2.833")
   ,("mutator_wall_seconds", "4.283")
   ,("GC_cpu_seconds", "0.960")
   ,("GC_wall_seconds", "0.961")
   ]
 ```

 after:
 ```
   [("bytes allocated", "1301088064")
   ,("num_GCs", "310")
   ,("average_bytes_used", "8820253")
   ,("max_bytes_used", "24539904")
   ,("num_byte_usage_samples", "9")
   ,("peak_megabytes_allocated", "64")
   ,("init_cpu_seconds", "0.001")
   ,("init_wall_seconds", "0.001")
   ,("mutator_cpu_seconds", "2.876")
   ,("mutator_wall_seconds", "4.474")
   ,("GC_cpu_seconds", "0.965")
   ,("GC_wall_seconds", "0.979")
   ]
 ```

 CPU time seems to be up a bit, but I'm not sure. Unfortunately CPU time
 measurements are rather noisy.

 Reviewers: austin, bgamari, rwbarton

 Subscribers: nomeata

 Differential Revision: https://phabricator.haskell.org/D1143

 GHC Trac Issues: #1405
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1405#comment:21>
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