[GHC] #12916: GHC 8.0.1 vs GHC HEAD (8.1.20161202) doesn't do inlining and unboxing very well

[GHC]

#12916: GHC 8.0.1 vs GHC HEAD (8.1.20161202) doesn't do inlining and unboxing very
well
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        Reporter:  alexbiehl         |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      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 alexbiehl):

 Strange, my ghc-stage2 is at the same git revision! This is how I invoked
 it to get to the core:

 {{{#!bash
 /Users/alexbiehl/git/ghc/inplace/bin/ghc-stage2 test.hs -O2 -threaded
 -rtsopts -ddump-simpl -dsupress-idinfo  -dsuppress-coercions -dsuppress-
 type-applications  -dsuppress-uniques -dsuppress-module-prefixes -fforce-
 recomp | less
 }}}

 (where test.hs is the decode.hs from github link)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12916#comment:3>
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