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

[via llvm-commits]

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@@ -466,6 +466,31 @@ class TargetFrameLowering {
   /// Return the frame base information to be encoded in the DWARF subprogram
   /// debug info.
   virtual DwarfFrameBase getDwarfFrameBase(const MachineFunction &MF) const;
+
+  /// Issue instructions to allocate stack space and spill FP and/or BP to stack
+  /// using SP register.
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zmodem wrote:

nit: Consider spelling out the abbreviations (FP, BP, SP).

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