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

[Matt Arsenault via llvm-commits]

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@@ -851,18 +855,12 @@ bool MIRParserImpl::initializeFrameInfo(PerFunctionMIParsingState &PFS,
   MFI.setHasTailCall(YamlMFI.HasTailCall);
   MFI.setCalleeSavedInfoValid(YamlMFI.IsCalleeSavedInfoValid);
   MFI.setLocalFrameSize(YamlMFI.LocalFrameSize);
-  if (!YamlMFI.SavePoint.Value.empty()) {
-    MachineBasicBlock *MBB = nullptr;
-    if (parseMBBReference(PFS, MBB, YamlMFI.SavePoint))
-      return true;
-    MFI.setSavePoint(MBB);
-  }
-  if (!YamlMFI.RestorePoint.Value.empty()) {
-    MachineBasicBlock *MBB = nullptr;
-    if (parseMBBReference(PFS, MBB, YamlMFI.RestorePoint))
-      return true;
-    MFI.setRestorePoint(MBB);
-  }
+  if (initializeSaveRestorePoints(PFS, YamlMFI.SavePoints,
+                                  true /*IsSavePoints*/))
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arsenm wrote:

```suggestion
                                  /*IsSavePoints=*/true))
```

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