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2. Help DAGCombiner recognize zero/sign/any-extended versions of ROTR and ROTL patterns. This was motivated by the X86/rotate.ll testcase, which should now generate code for other platforms (and soon-to-come platforms.) Rewrote code slightly to make it easier to read. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35605 91177308-0d34-0410-b5e6-96231b3b80d8
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