Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/clang-tools-extra/test/clang-tidy/hicpp-signed-bitwise-bug34747.cpp

@@ -0,0 +1,29 @@
+// RUN: %check_clang_tidy %s hicpp-signed-bitwise %t --
+
+// 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);
+}
+
+void silence_lit() {
+  int SValue = 42;
+  int SResult;
+
+  SResult = SValue & 1;
+  // CHECK-MESSAGES: :[[@LINE-1]]:13: warning: use of a signed integer operand with a binary bitwise operator
+}