[llvm] [RISCV] Eliminate dead li after emitting VSETVLIs (PR #65934)

[Philip Reames via llvm-commits]

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@@ -757,7 +757,8 @@ class RISCVInsertVSETVLI : public MachineFunctionPass {
   bool computeVLVTYPEChanges(const MachineBasicBlock &MBB,
                              VSETVLIInfo &Info) const;
   void computeIncomingVLVTYPE(const MachineBasicBlock &MBB);
-  void emitVSETVLIs(MachineBasicBlock &MBB);
+  void emitVSETVLIs(MachineBasicBlock &MBB,
+                    SmallVectorImpl<MachineInstr *> &DeadVLInstrs);
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preames wrote:

Dead here is misleading, these are only possibly dead.

Rename to something like DefsWithRemovedUses, or PossiblyDeadInstrs. 

https://github.com/llvm/llvm-project/pull/65934