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Author SHA1 Message Date
Hal Finkel 9bb61de1be [PowerPC] Enable speculation of cttz/ctlz 
PPC has an instruction for ctlz with defined zero behavior, and our lowering of
cttz (provided by DAGCombine) is also efficient and branchless, so speculating
these makes sense.

llvm-svn: 225150
 2015-01-05 05:24:42 +00:00