[llvm] [CodeGen] Utilizing register units based liveIns tracking in MBB (PR #129847)

[Matt Arsenault via llvm-commits]

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@@ -158,6 +159,7 @@ class MachineBasicBlock
 
   MachineFunction *xParent;
   Instructions Insts;
+  const TargetRegisterInfo *TRI;
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arsenm wrote:

This should not gain a TRI member 

https://github.com/llvm/llvm-project/pull/129847