[GHC] #1811: liberate case causes code duplication

[GHC]

#1811: liberate case causes code duplication
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    Reporter:  simonmar  |        Owner:  igloo     
        Type:  merge     |       Status:  new       
    Priority:  normal    |    Milestone:  6.8 branch
   Component:  Compiler  |      Version:  6.8       
    Severity:  normal    |   Resolution:            
    Keywords:            |   Difficulty:  Unknown   
          Os:  Unknown   |     Testcase:            
Architecture:  Unknown   |  
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Changes (by simonmar):

  * owner:  simonmar => igloo

Comment:

 Compiling the libraries with -O2 and the above fix, gives 5% increase in
 code over `-O2 -fno-liberate-case`.  Yesterday I measured `-O2` as 10%
 larger code over `-O2 -fno-liberate-case`, so it looks like the fix saves
 5%.

 However, these results don't seem to carry over to x86_64, I'm not sure
 what's going on yet.

 The patch could go into stable, but more investigation is still needed.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1811#comment:3>
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