[llvm] [llvm][CodeGen] Fix the issue caused by live interval checking in window scheduler (PR #123184)

[Matt Arsenault via llvm-commits]

================
@@ -303,6 +303,7 @@ void WindowScheduler::generateTripleMBB() {
       if (Register AntiReg = getAntiRegister(MI))
         DefPairs[MI->getOperand(0).getReg()] = AntiReg;
     auto *NewMI = MF->CloneMachineInstr(MI);
+    Context->LIS->RemoveMachineInstrFromMaps(*NewMI);
----------------
arsenm wrote:

Yes, the maps should be updated at the point the corresponding instruction is removed. If the instruction is deleted there, the map should be updated as a paired action 

https://github.com/llvm/llvm-project/pull/123184