diff --git a/bolt/include/bolt/Core/BinaryContext.h b/bolt/include/bolt/Core/BinaryContext.h
--- a/bolt/include/bolt/Core/BinaryContext.h
+++ b/bolt/include/bolt/Core/BinaryContext.h
@@ -239,7 +239,7 @@
   Optional<DWARFUnit *> getDWOCU(uint64_t DWOId);
 
   /// Returns DWOContext if it exists.
-  DWARFContext *getDWOContext();
+  DWARFContext *getDWOContext() const;
 
   /// Get Number of DWOCUs in a map.
   uint32_t getNumDWOCUs() { return DWOCUs.size(); }
diff --git a/bolt/lib/Core/BinaryContext.cpp b/bolt/lib/Core/BinaryContext.cpp
--- a/bolt/lib/Core/BinaryContext.cpp
+++ b/bolt/lib/Core/BinaryContext.cpp
@@ -1411,7 +1411,7 @@
   return Iter->second;
 }
 
-DWARFContext *BinaryContext::getDWOContext() {
+DWARFContext *BinaryContext::getDWOContext() const {
   if (DWOCUs.empty())
     return nullptr;
   return &DWOCUs.begin()->second->getContext();
@@ -1673,6 +1673,36 @@
   return getMarkerType(Symbol) != MarkerSymType::NONE;
 }
 
+static void printDebugInfo(raw_ostream &OS, const MCInst &Instruction,
+                           const BinaryFunction *Function,
+                           DWARFContext *DwCtx) {
+  DebugLineTableRowRef RowRef =
+      DebugLineTableRowRef::fromSMLoc(Instruction.getLoc());
+  if (RowRef == DebugLineTableRowRef::NULL_ROW)
+    return;
+
+  const DWARFDebugLine::LineTable *LineTable;
+  if (Function && Function->getDWARFUnit() &&
+      Function->getDWARFUnit()->getOffset() == RowRef.DwCompileUnitIndex) {
+    LineTable = Function->getDWARFLineTable();
+  } else {
+    LineTable = DwCtx->getLineTableForUnit(
+        DwCtx->getCompileUnitForOffset(RowRef.DwCompileUnitIndex));
+  }
+  assert(LineTable && "line table expected for instruction with debug info");
+
+  const DWARFDebugLine::Row &Row = LineTable->Rows[RowRef.RowIndex - 1];
+  StringRef FileName = "";
+  if (Optional<const char *> FName =
+          dwarf::toString(LineTable->Prologue.FileNames[Row.File - 1].Name))
+    FileName = *FName;
+  OS << " # debug line " << FileName << ":" << Row.Line;
+  if (Row.Column)
+    OS << ":" << Row.Column;
+  if (Row.Discriminator)
+    OS << " discriminator:" << Row.Discriminator;
+}
+
 void BinaryContext::printInstruction(raw_ostream &OS, const MCInst &Instruction,
                                      uint64_t Offset,
                                      const BinaryFunction *Function,
@@ -1720,33 +1750,8 @@
 
   MIB->printAnnotations(Instruction, OS);
 
-  if (opts::PrintDebugInfo) {
-    DebugLineTableRowRef RowRef =
-        DebugLineTableRowRef::fromSMLoc(Instruction.getLoc());
-    if (RowRef != DebugLineTableRowRef::NULL_ROW) {
-      const DWARFDebugLine::LineTable *LineTable;
-      if (Function && Function->getDWARFUnit() &&
-          Function->getDWARFUnit()->getOffset() == RowRef.DwCompileUnitIndex) {
-        LineTable = Function->getDWARFLineTable();
-      } else {
-        LineTable = DwCtx->getLineTableForUnit(
-            DwCtx->getCompileUnitForOffset(RowRef.DwCompileUnitIndex));
-      }
-      assert(LineTable &&
-             "line table expected for instruction with debug info");
-
-      const DWARFDebugLine::Row &Row = LineTable->Rows[RowRef.RowIndex - 1];
-      StringRef FileName = "";
-      if (Optional<const char *> FName =
-              dwarf::toString(LineTable->Prologue.FileNames[Row.File - 1].Name))
-        FileName = *FName;
-      OS << " # debug line " << FileName << ":" << Row.Line;
-      if (Row.Column)
-        OS << ":" << Row.Column;
-      if (Row.Discriminator)
-        OS << " discriminator:" << Row.Discriminator;
-    }
-  }
+  if (opts::PrintDebugInfo)
+    printDebugInfo(OS, Instruction, Function, DwCtx.get());
 
   if ((opts::PrintRelocations || PrintRelocations) && Function) {
     const uint64_t Size = computeCodeSize(&Instruction, &Instruction + 1);