[llvm] [NFC][TableGen] Code cleanup in CodeGenRegister (PR #137994)

[Rahul Joshi via llvm-commits]

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@@ -2135,28 +2115,33 @@ void CodeGenRegBank::computeRegUnitSets() {
   if (RegUnitSets.empty())
     PrintFatalError("RegUnitSets cannot be empty!");
 
-  LLVM_DEBUG(dbgs() << "\nBefore pruning:\n"; for (unsigned USIdx = 0,
-                                                   USEnd = RegUnitSets.size();
-                                                   USIdx < USEnd; ++USIdx) {
-    dbgs() << "UnitSet " << USIdx << " " << RegUnitSets[USIdx].Name << ":";
-    for (auto &U : RegUnitSets[USIdx].Units)
-      printRegUnitName(U);
-    dbgs() << "\n";
+  LLVM_DEBUG({
+    dbgs() << "\nBefore pruning:\n";
+    for (auto [USIdx, US] : enumerate(RegUnitSets)) {
+      dbgs() << "UnitSet " << USIdx << " " << US.Name << ":";
+      for (auto &U : US.Units)
+        printRegUnitName(U);
+      dbgs() << '\n';
+    }
   });
 
   // Iteratively prune unit sets.
   pruneUnitSets();
 
-  LLVM_DEBUG(dbgs() << "\nBefore union:\n"; for (unsigned USIdx = 0,
-                                                 USEnd = RegUnitSets.size();
-                                                 USIdx < USEnd; ++USIdx) {
-    dbgs() << "UnitSet " << USIdx << " " << RegUnitSets[USIdx].Name << ":";
-    for (auto &U : RegUnitSets[USIdx].Units)
-      printRegUnitName(U);
-    dbgs() << "\n";
-  } dbgs() << "\nUnion sets:\n");
+  LLVM_DEBUG({
+    dbgs() << "\nBefore union:\n";
+    for (auto [USIdx, US] : enumerate(RegUnitSets)) {
+      dbgs() << "UnitSet " << USIdx << " " << US.Name << ":";
+      for (auto &U : US.Units)
+        printRegUnitName(U);
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jurahul wrote:

moved to helper function.

https://github.com/llvm/llvm-project/pull/137994