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The final piece of IR-level analysis to allow this was committed with: rL350188 Using the intrinsics should improve transforms based on cost models like vectorization and inlining. The backend should be prepared too, so we can now canonicalize more sequences of shift/logic to the intrinsics and know that the end result should be equal or better to the original code even if the target does not have an actual rotate instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350199 91177308-0d34-0410-b5e6-96231b3b80d8