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Commit b6a4ba80 authored by Chris Lattner's avatar Chris Lattner
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Change the rename pass to be "tail recursive", only adding N-1 successors 

to the worklist, and handling the last one with a 'tail call'.  This speeds
up PR1432 from 2.0578s to 2.0012s (2.8%)

llvm-svn: 40822
parent 840259c8
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