Do no fail on missing no_diff annotation on non-differentiable (inputs and output) function outputs (#6737)

Closes https://github.com/shader-slang/slang/issues/6632

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/bugs/gh-6632.slang b/tests/bugs/gh-6632.slang
new file mode 100644
index 000000000..f9240e63b
--- /dev/null
+++ b/tests/bugs/gh-6632.slang
@@ -0,0 +1,29 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-cpu
+
+// CHECK: 40000000
+
+//TEST_INPUT:ubuffer(data=[0], stride=4):out,name=outputBuffer
+
+// Non-differentiable function with no_diff parameters and return type
+no_diff float targetFunc(no_diff float x)
+{
+    return x * 2.0f;
+}
+
+[Differentiable]
+float errorForward(no_diff float x)
+{
+    float result = targetFunc(x);
+    return result;
+}
+
+RWStructuredBuffer<float> outputBuffer;
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    float input = 1.0f;
+
+    outputBuffer[0] = errorForward(input);
+}
+