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Summary: In some specific scenarios with well understood operand bundle types (like `"deopt"`) it may be possible to go ahead and convert recursion to iteration, but TailRecursionElimination does not have that logic today so avoid doing the right thing for now. I need some input on whether `"funclet"` operand bundles should also block tail recursion elimination. If not, I'll allow TRE across calls with `"funclet"` operand bundles and add a test case. Reviewers: rnk, majnemer, nlewycky, ahatanak Subscribers: mcrosier, llvm-commits Differential Revision: https://reviews.llvm.org/D26270 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286147 91177308-0d34-0410-b5e6-96231b3b80d8