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Author SHA1 Message Date
Tony Jiang 133fa95ca7 [PowerPC] Fix a performance bug for PPC::XXSLDWI. 
There are some VectorShuffle Nodes in SDAG which can be selected to XXSLDWI
instruction, this patch recognizes them and does the selection to improve the
PPC performance.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@303822 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-05-24 23:48:29 +00:00