[llvm] [llvm] Support multiple save/restore points in mir (PR #119357)

[Philip Reames via llvm-commits]

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@@ -569,7 +579,10 @@ static void updateLiveness(MachineFunction &MF) {
   }
   Visited.insert(Save);
 
-  MachineBasicBlock *Restore = MFI.getRestorePoint();
+  assert(MFI.getRestorePoints().size() < 2 &&
+         "MFI can't contain multiple restore points!");
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preames wrote:

Same

https://github.com/llvm/llvm-project/pull/119357