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Commit f83ce5fa authored by Chris Lattner's avatar Chris Lattner
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Make loop-simplify produce better loops by turning PHI nodes like X = phi [X, Y] 

into just Y.  This often occurs when it seperates loops that have collapsed loop
headers.  This implements LoopSimplify/phi-node-simplify.ll

llvm-svn: 22746
parent d54879c1
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