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The LR register is unconditionally reserved, and its spilling and restoration is handled by the prologue/epilogue code. As a result, it is never explicitly spilled by the register allocator. No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177823 91177308-0d34-0410-b5e6-96231b3b80d8