[GHC] #14123: Figure out invariants surrounding ticks in Core

[GHC]

#14123: Figure out invariants surrounding ticks in Core
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  highest           |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"6e7c09d083358b07401cbecc36043be5dfe15f84/ghc" 6e7c09d/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="6e7c09d083358b07401cbecc36043be5dfe15f84"
 StgCmmMonad: Remove unnecessary use of unboxed tuples

 The simplifier can simplify this without any trouble. Moreover, the
 unboxed tuples cause bootstrapping issues due #14123.

 I also went ahead and inlined a few definitions into the Monad instance.

 Test Plan: Validate

 Reviewers: austin, simonmar

 Subscribers: rwbarton, thomie

 Differential Revision: https://phabricator.haskell.org/D4026
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14123#comment:3>
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