[llvm] [NFC] Various Cleanup in StackColoring, StackSlotColoring, LiveStacks (PR #143931)

[via llvm-commits]

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@@ -532,18 +526,43 @@ void StackColoringLegacy::getAnalysisUsage(AnalysisUsage &AU) const {
 }
 
 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
-LLVM_DUMP_METHOD void StackColoring::dumpBV(const char *tag,
-                                            const BitVector &BV) const {
-  dbgs() << tag << " : { ";
-  for (unsigned I = 0, E = BV.size(); I != E; ++I)
-    dbgs() << BV.test(I) << " ";
-  dbgs() << "}\n";
+
+LLVM_DUMP_METHOD void dumpBV(StringRef tag, const BitVector &BV) {
+  constexpr unsigned ColumnWidth = 150;
+  unsigned LineStartOffset = tag.size() + /*" : "*/ 3;
+  unsigned WidthAfterTag = ColumnWidth - LineStartOffset;
+  unsigned NumBitsPerColumn = WidthAfterTag / 2;
+  unsigned BitsCount = BV.size();
+  for (unsigned Bits = 0; Bits < BitsCount; Bits += NumBitsPerColumn) {
+    unsigned Start = Bits;
+    unsigned End = std::min(Start + NumBitsPerColumn, BitsCount);
+
+    dbgs() << tag << " : ";
+
+    for (unsigned I = Start; I < End; ++I)
+      dbgs() << BV.test(I) << " ";
+    dbgs() << '\n';
+    dbgs() << tag << " : ";
+    unsigned next = Start;
+    for (unsigned I = Start; I < End; ++I) {
+      if (I < next)
+        continue;
+      if (BV.test(I)) {
+        int numDidgits = I != 0 ? (log10(I) + 1) : 1;
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Ralender wrote:

Done

https://github.com/llvm/llvm-project/pull/143931