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100a94bc93
We used to add a spill slot for the register scavenger whenever the function has a frame pointer. This is unnecessarily conservative: We may need the spill slot for dynamic stack allocations, and functions with dynamic stack allocations always have a FP, but we might also have a FP for other reasons (such as the user explicitly disabling frame-pointer elimination), and we don't necessarily need a spill slot for those functions. The structsinregs test needed adjustment because it disables FP elimination. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177106 91177308-0d34-0410-b5e6-96231b3b80d8
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