[GHC] #2110: Rules to eliminate casted id's

[GHC]

#2110: Rules to eliminate casted id's
-------------------------------------+------------------------------------
        Reporter:  igloo             |            Owner:
            Type:  feature request   |           Status:  closed
        Priority:  lowest            |        Milestone:  7.10.1
       Component:  Compiler          |          Version:  6.8.2
      Resolution:  fixed             |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:  #8767
-------------------------------------+------------------------------------
Changes (by nomeata):

 * status:  patch => closed
 * resolution:   => fixed
 * related:   => #8767


Comment:

 Ok, pushed in patches
 {{{
 git log b4715d67^...cde88e20
 }}}

 Patch f4fb94f3 has a small improvement of compiler performance as a side-
 effect (which I did not investigate further).

 The ask of actually adding such rules is tracked in #8767.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2110#comment:48>
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