get original line of source code for inlined function call

llvm/lib/Transforms/IPO/WholeProgramInstrumentDumpper.cpp

@@ -17,8 +17,15 @@ struct VisBasicBlock {
                         if (auto Loc = Inst.getDebugLoc()) {
                                 if (Loc.getLine() == 0)
                                         continue;
-                                Line = std::min(Line, Loc.getLine());
-                                LineEnd = std::max(LineEnd, Loc.getLine());
+                                auto theLoc = Loc.get();
+                                if (auto loc_tmp = theLoc->getInlinedAt()) {
+                                  while (loc_tmp->getInlinedAt()) {
+                                    loc_tmp = loc_tmp->getInlinedAt();
+                                  }
+                                  theLoc = loc_tmp;
+                                }
+                                Line = std::min(Line, theLoc->getLine());
+                                LineEnd = std::max(LineEnd, theLoc->getLine());
                         }
                 }
                 // Restore to 0 when debug info is not available