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

[Elizaveta Noskova via llvm-commits]

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@@ -646,6 +647,41 @@ void MIRPrinter::convert(yaml::MachineFunction &MF,
   }
 }
 
+void MIRPrinter::convert(ModuleSlotTracker &MST,
+                         yaml::SaveRestorePoints &YamlSRPoints,
+                         const llvm::SaveRestorePoints::PointsMap &SRPoints,
+                         const TargetRegisterInfo *TRI) {
+  auto &Points =
+      std::get<std::vector<yaml::SaveRestorePointEntry>>(YamlSRPoints);
+  for (const auto &MBBEntry : SRPoints) {
+    SmallString<16> Str;
+    yaml::SaveRestorePointEntry Entry;
+    raw_svector_ostream StrOS(Str);
+    StrOS << printMBBReference(*MBBEntry.first);
+    Entry.Point = StrOS.str().str();
+    Str.clear();
+    for (const CalleeSavedInfo &Info : MBBEntry.second) {
+      if (Info.getReg()) {
+        StrOS << printReg(Info.getReg(), TRI);
+        Entry.Registers.push_back(StrOS.str().str());
+        Str.clear();
+      }
+    }
+    // Sort here needed for stable output for lit tests
+    std::sort(Entry.Registers.begin(), Entry.Registers.end(),
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enoskova-sc wrote:

Unfortunately, llvm::sort doesn't work for fields of structures, created in yaml namespace.
yaml namespace has its own yaml::begin() and due to it call to begin() in adl_begin() becomes ambiguous.

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