Index: include/llvm/DebugInfo/DWARF/DWARFContext.h
===================================================================
--- include/llvm/DebugInfo/DWARF/DWARFContext.h
+++ include/llvm/DebugInfo/DWARF/DWARFContext.h
@@ -34,6 +34,7 @@
 #include <deque>
 #include <map>
 #include <memory>
+#include <set>
 #include <utility>
 
 namespace llvm {
@@ -191,6 +192,10 @@
   /// Get a pointer to a parsed line table corresponding to a compile unit.
   const DWARFDebugLine::LineTable *getLineTableForUnit(DWARFUnit *cu);
 
+  /// Get a set of all addresses that appear in the line tables of the compile
+  /// units in this DWARF context.
+  std::set<uint64_t> getAllLineAddresses();
+
   DILineInfo getLineInfoForAddress(uint64_t Address,
       DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
   DILineInfoTable getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
Index: lib/DebugInfo/DWARF/DWARFContext.cpp
===================================================================
--- lib/DebugInfo/DWARF/DWARFContext.cpp
+++ lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -432,6 +432,19 @@
   return Line->getOrParseLineTable(lineData, stmtOffset);
 }
 
+std::set<uint64_t> DWARFContext::getAllLineAddresses() {
+  parseCompileUnits();
+
+  std::set<uint64_t> Result;
+  for (const auto &CU : CUs) {
+    const DWARFLineTable* table = getLineTableForUnit(CU.get());
+    for (const DWARFDebugLine::Row &row : table->Rows) {
+      Result.insert(row.Address);
+    }
+  }
+  return Result;
+}
+
 void DWARFContext::parseCompileUnits() {
   CUs.parse(*this, getInfoSection());
 }