[llvm] [RISCV] Dynamically find unused register for stack protection code (PR #210992)

[via llvm-commits]

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@@ -647,6 +647,47 @@ getQCISavedInfo(const MachineFunction &MF,
   return QCIInterruptCSI;
 }
 
+static void getLiveRegsForEntryMBB(LivePhysRegs &LiveRegs,
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janr-bay wrote:

Fair point. I've added a short explanation to the commit message and decription

https://github.com/llvm/llvm-project/pull/210992