[GHC] #8871: No-op assignment I64[BaseReg + 784] = I64[BaseReg + 784]; is generated into optimized Cmm

[GHC]

#8871: No-op assignment I64[BaseReg + 784] = I64[BaseReg + 784]; is generated into
optimized Cmm
-------------------------------------+-------------------------------------
              Reporter:  kgardas     |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.9
  (CodeGen)                          |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Runtime     |  Related Tickets:
  performance bug                    |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by thomie):

 * failure:  Other => Runtime performance bug
 * component:  Compiler => Compiler (CodeGen)


--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8871#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler