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2984497cc1
InstCombine converts (sub 32, (add X, C)) into (sub 32-C, X), so a rotate left of a 32-bit Y by X+C could appear as either: (or (shl Y, (add X, C)), (shr Y, (sub 32, (add X, C)))) without InstCombine or: (or (shl Y, (add X, C)), (shr Y, (sub 32-C, X))) with it. We already matched the first form. This patch handles the second too. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198860 91177308-0d34-0410-b5e6-96231b3b80d8
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