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Commit 3570f81b authored by Dan Gohman's avatar Dan Gohman
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Move PHIElimination's SplitCriticalEdge for MachineBasicBlocks out 

into a utility routine, teach it how to update MachineLoopInfo, and
make use of it in MachineLICM to split critical edges on demand.

llvm-svn: 106555
parent a9f90275
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