diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index c1e0ad128bc..85d365306a2 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -364,6 +364,19 @@ struct BreakpointPrinter : public FunctionPass {
       } while (BI != I->begin());
       break;
     }
+    BasicBlock &EntryBB = F.getEntryBlock();
+    for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I) {
+      BasicBlock *BB = I;
+      if (BB == &EntryBB) continue;
+      for (BasicBlock::iterator BI = I->begin(), BE = I->end(); BI != BE; ++BI)
+        if (CallInst *CI = dyn_cast<CallInst>(BI)) {
+          const DebugLoc DL = CI->getDebugLoc();
+          if (!DL.isUnknown()) {
+            DIScope S(DL.getScope(getGlobalContext()));
+            Out << S.getFilename() << " " << DL.getLine() << "\n";
+          }
+        }
+    }
     return false;
   }