[llvm] Spill/restore FP/BP around instructions in which they are clobbered (PR #81048)

[via llvm-commits]

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@@ -599,6 +599,7 @@ class MachineFrameInfo {
   /// Return the alignment in bytes that this function must be aligned to,
   /// which is greater than the default stack alignment provided by the target.
   Align getMaxAlign() const { return MaxAlignment; }
+  Align getStackAlignment() const { return StackAlignment; }
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zmodem wrote:

It's surprising that we didn't need to expose this before now. Do we really need it? And if we do, should it have its own comment?

https://github.com/llvm/llvm-project/pull/81048