Index: clang-tidy/hicpp/SignedBitwiseCheck.cpp
===================================================================
--- clang-tidy/hicpp/SignedBitwiseCheck.cpp
+++ clang-tidy/hicpp/SignedBitwiseCheck.cpp
@@ -27,7 +27,9 @@
       binaryOperator(allOf(anyOf(hasOperatorName("|"), hasOperatorName("&"),
                                  hasOperatorName("^"), hasOperatorName("<<"),
                                  hasOperatorName(">>")),
-                           hasEitherOperand(SignedIntegerOperand)))
+                           hasEitherOperand(SignedIntegerOperand),
+                           hasLHS(hasType(isInteger())),
+                           hasRHS(hasType(isInteger()))))
           .bind("binary_signed"),
       this);
 
Index: test/clang-tidy/hicpp-signed-bitwise-bug34747.cpp
===================================================================
--- /dev/null
+++ test/clang-tidy/hicpp-signed-bitwise-bug34747.cpp
@@ -0,0 +1,21 @@
+// RUN: %check_clang_tidy %s hicpp-signed-bitwise %t -- -- -std=c++11 | count 0
+
+// Note: this test expects no diagnostics, but FileCheck cannot handle that,
+// hence the use of | count 0.
+
+template <typename C>
+struct OutputStream {
+  OutputStream &operator<<(C);
+};
+
+template <typename C>
+struct foo {
+  typedef OutputStream<C> stream_type;
+  foo(stream_type &o) {
+    o << 'x'; // warning occured here, fixed now
+  }
+};
+
+void bar(OutputStream<signed char> &o) {
+  foo<signed char> f(o);
+}