[GHC] #3170: -fregs-graph: GraphOps.coalesceNodes: can't coalesce the same node.

[GHC]

#3170: -fregs-graph: GraphOps.coalesceNodes: can't coalesce the same node.
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    Reporter:  igloo             |        Owner:  benl            
        Type:  bug               |       Status:  closed          
    Priority:  high              |    Milestone:  6.12.1          
   Component:  Compiler          |      Version:  6.10.2          
    Severity:  normal            |   Resolution:  fixed           
    Keywords:                    |   Difficulty:  Unknown         
    Testcase:                    |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by benl):

  * status:  assigned => closed
  * resolution:  => fixed

Comment:

 Sat Apr 18 18:22:53 EST 2009  Ben.Lippmeier at anu.edu.au
   * Fix #3170: Allow coalescing of the same node during register
 allocation.
     The x86 code generator sometimes generates nop moves like
     movl %vI_a %vI_a, but we'll just ignore them for coalescing
     purposes instead of emitting an error. It shouldn't hurt anything.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3170#comment:2>
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