Index: test/Tooling/clang-diff-basic.cpp
===================================================================
--- test/Tooling/clang-diff-basic.cpp
+++ test/Tooling/clang-diff-basic.cpp
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 -E %s > %T/src.cpp
 // RUN: %clang_cc1 -E %s > %T/dst.cpp -DDEST
-// RUN: clang-diff -no-compilation-database %T/src.cpp %T/dst.cpp | FileCheck %s
+// RUN: clang-diff -m -no-compilation-database %T/src.cpp %T/dst.cpp | FileCheck %s
 
 #ifndef DEST
 namespace src {
Index: tools/clang-diff/ClangDiff.cpp
===================================================================
--- tools/clang-diff/ClangDiff.cpp
+++ tools/clang-diff/ClangDiff.cpp
@@ -33,6 +33,10 @@
     cl::desc("Print the internal representation of the AST as JSON."),
     cl::init(false), cl::cat(ClangDiffCategory));
 
+static cl::opt<bool>
+    PrintMatches("m", cl::desc("Print the matched nodes (verbose)."),
+                 cl::init(false), cl::cat(ClangDiffCategory));
+
 static cl::opt<bool> NoCompilationDatabase(
     "no-compilation-database",
     cl::desc(
@@ -270,7 +274,7 @@
 
   for (diff::NodeId Dst : DstTree) {
     diff::NodeId Src = Diff.getMapped(DstTree, Dst);
-    if (Src.isValid()) {
+    if (PrintMatches && Src.isValid()) {
       llvm::outs() << "Match ";
       printNode(llvm::outs(), SrcTree, Src);
       llvm::outs() << " to ";