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

Currently mir supports only one save and one restore point
specification:

```
  savePoint:       '%bb.1'
  restorePoint:    '%bb.2'
```

This patch provide possibility to have multiple save and multiple
restore points in mir:

```
  savePoints:
    - point:           '%bb.1'
  restorePoints:
    - point:           '%bb.2'
```

Shrink-Wrap points split Part 3.
RFC:
https://discourse.llvm.org/t/shrink-wrap-save-restore-points-splitting/83581

Part 1: https://github.com/llvm/llvm-project/pull/117862
Part 2: https://github.com/llvm/llvm-project/pull/119355
Part 4: https://github.com/llvm/llvm-project/pull/119358
Part 5: https://github.com/llvm/llvm-project/pull/119359

1 files changed, 10 insertions, 4 deletions

diff --git a/llvm/tools/llvm-reduce/ReducerWorkItem.cpp b/llvm/tools/llvm-reduce/ReducerWorkItem.cpp
index 3f84e8f..248714f 100644
--- a/llvm/tools/llvm-reduce/ReducerWorkItem.cpp
+++ b/llvm/tools/llvm-reduce/ReducerWorkItem.cpp
@@ -92,11 +92,17 @@ static void cloneFrameInfo(
   DstMFI.setCVBytesOfCalleeSavedRegisters(
       SrcMFI.getCVBytesOfCalleeSavedRegisters());
 
-  if (MachineBasicBlock *SavePt = SrcMFI.getSavePoint())
-    DstMFI.setSavePoint(Src2DstMBB.find(SavePt)->second);
-  if (MachineBasicBlock *RestorePt = SrcMFI.getRestorePoint())
-    DstMFI.setRestorePoint(Src2DstMBB.find(RestorePt)->second);
+  assert(SrcMFI.getSavePoints().size() < 2 &&
+         "Multiple restore points not yet supported!");
 
+  DstMFI.setSavePoints(MachineFrameInfo::constructSaveRestorePoints(
+      SrcMFI.getSavePoints(), Src2DstMBB));
+
+  assert(SrcMFI.getRestorePoints().size() < 2 &&
+         "Multiple restore points not yet supported!");
+
+  DstMFI.setRestorePoints(MachineFrameInfo::constructSaveRestorePoints(
+      SrcMFI.getRestorePoints(), Src2DstMBB));
 
   auto CopyObjectProperties = [](MachineFrameInfo &DstMFI,
                                  const MachineFrameInfo &SrcMFI, int FI) {