1 files changed, 16 insertions, 0 deletions
diff --git a/build/clang-plugin/tests/TestNANTestingExpr.cpp b/build/clang-plugin/tests/TestNANTestingExpr.cpp
new file mode 100644
index 0000000000..943577d4ae
--- /dev/null
+++ b/build/clang-plugin/tests/TestNANTestingExpr.cpp
@@ -0,0 +1,16 @@
+void test(bool x);
+void foo() {
+  float f, f2;
+  typedef double mydouble;
+  mydouble d;
+  double d2;
+  test(f == f); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
+  test(d == d); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
+  test(f != f); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
+  test(d != d); // expected-error{{comparing a floating point value to itself for NaN checking can lead to incorrect results}} expected-note{{consider using mozilla::IsNaN instead}}
+  test(f != d);
+  test(d == (d - f));
+  test(f == f2);
+  test(d == d2);
+  test(d + 1 == d);
+}