1 files changed, 42 insertions, 0 deletions
diff --git a/tests/diagnostics/force-no-diff-this.slang b/tests/diagnostics/force-no-diff-this.slang
new file mode 100644
index 000000000..ae1464ffb
--- /dev/null
+++ b/tests/diagnostics/force-no-diff-this.slang
@@ -0,0 +1,42 @@
+//DIAGNOSTIC_TEST:SIMPLE(filecheck=CHECK):
+
+struct MyStruct<T> where T: __BuiltinFloatingPointType
+{
+    float a;
+    __init(float a) { this.a = a;}
+
+    [Differentiable]
+    T eval(T x)
+    {
+        //CHECK: ([[# @LINE+1]]): warning 31159
+        return exp(x * T(a) * T(a));
+    }
+
+    [Differentiable]
+    [NoDiffThis]
+    T eval1(T x)
+    {
+        //CHECK-NOT: ([[# @LINE+1]]): warning 31159
+        return exp(x * T(a) * T(a));
+    }
+};
+
+[Differentiable]
+float evalFunc(float x)
+{
+    MyStruct<float> s = {x};
+    return s.eval(x) + s.eval1(x);
+}
+
+RWStructuredBuffer<float> output;
+
+[shader("compute")]
+[numthreads(1,1,1)]
+void computeMain(uint id : SV_DispatchThreadID)
+{
+    var x = diffPair(2.0f);
+    bwd_diff(evalFunc)(x, 1.0f);
+
+    output[0] = x.d;
+}
+