[llvm] [AMDGPU] Use 32-bit SGPR to save/restore of SCC (PR #68367)

[Sirish Pande via llvm-commits]

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@@ -960,6 +960,19 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
 
   unsigned getVALUOp(const MachineInstr &MI) const;
 
+  /// Return true if SCC is deinfed and not dead
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srpande wrote:

Good idea.

https://github.com/llvm/llvm-project/pull/68367