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
The old checking code, which assumed that input shuffles and insert-elements could always be folded (and thus were free) is too simple. This can only happen in special circumstances. Using the simple check caused infinite recursion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167750 91177308-0d34-0410-b5e6-96231b3b80d8