[llvm] [AMDGPU] Fix GCNUpwardRPTracker. (WIP) (PR #71186)

[Jay Foad via llvm-commits]

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@@ -261,15 +257,11 @@ void GCNRPTracker::reset(const MachineInstr &MI,
   MaxPressure = CurPressure = getRegPressure(*MRI, LiveRegs);
 }
 
-void GCNUpwardRPTracker::reset(const MachineInstr &MI,
-                               const LiveRegSet *LiveRegsCopy) {
-  GCNRPTracker::reset(MI, LiveRegsCopy, true);
-}
-
 void GCNUpwardRPTracker::reset(const MachineRegisterInfo &MRI_,
                                const LiveRegSet &LiveRegs_) {
   MRI = &MRI_;
   LiveRegs = LiveRegs_;
+  LastTrackedMI = nullptr; // TODO: LastTrackedMI isnt' used, remove?
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jayfoad wrote:

Just remove it

https://github.com/llvm/llvm-project/pull/71186