[GHC] #16007: Implement `-Os`

[GHC]

#16007: Implement `-Os`
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        Reporter:  sgraf             |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  ⊥
       Component:  Compiler          |              Version:  8.6.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #16005, #12915,   |  Differential Rev(s):
  #14226                             |
       Wiki Page:                    |
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Changes (by AndreasK):

 * related:  #16005 => #16005, #12915, #14226


Comment:

 There were also attempts to run a second common block elimination pass a
 while ago.

 That ran into some bugs and in the end went nowhere but would be another
 good idea for -Os.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16007#comment:3>
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