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Author SHA1 Message Date
Jakob Stoklund Olesen 8c139a5125 Clear kill flags before propagating a copy. 
The live range of the source register may be extended when a redundant
copy is eliminated. Make sure any kill flags between the two copies are
cleared.

This fixes PR11765.

llvm-svn: 149069
 2012-01-26 17:52:15 +00:00