[GHC] #13208: Do two-phase inlining in simpleOptPgm

[GHC]

#13208: Do two-phase inlining in simpleOptPgm
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        Reporter:  lukemaurer        |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:  fixed             |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
                                     |  deSugar/should_compile/T13208
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/394
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Comment (by Marge Bot <ben+marge-bot@…>):

 In [changeset:"5eeefe4c1e007ea2098f241634b48a4dada785a5/ghc"
 5eeefe4c/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="5eeefe4c1e007ea2098f241634b48a4dada785a5"
 Improve the very simple optimiser slightly

 There was a missing case in the very simple optimiser,
 CoreOpt.simpleOptExpr, which led to Trac #13208 comment:2.

 In particular, in simple_app, if we find a Let, we should
 just float it outwards. Otherwise we leave behind some
 easy-to-reduce beta-redexes.
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13208#comment:7>
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