[GHC] #14068: Loopification using join points

[GHC]

#14068: Loopification using join points
-------------------------------------+-------------------------------------
        Reporter:  nomeata           |                Owner:  nomeata
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  JoinPoints
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13966 #14067     |  Differential Rev(s):  Phab:D3811
  #14827                             |
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by nomeata):

 Here is some data about `x2n1`:

 {{{
 master   loopification  flags
 1017640  1017688        -O
 1017640  1017688        -O -fliberate-case
  378248   378296        -O -fspec-constr
  378248   698264        -O -fspec-constr -fliberate-case (== -O2)
 }}}

 So liberate case + loopification breaks parts of spec-constr…

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14068#comment:27>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler