use `nullptr' for IRStructKey with `IRDerivativeMemberDecoration` (#4623)

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/compute/struct-autodiff-default-init.slang b/tests/compute/struct-autodiff-default-init.slang
new file mode 100644
index 000000000..3d6548125
--- /dev/null
+++ b/tests/compute/struct-autodiff-default-init.slang
@@ -0,0 +1,25 @@
+// struct-default-init.slang
+//TEST:SIMPLE(filecheck=HLSL): -target hlsl -entry computeMain -stage compute
+//TEST:SIMPLE(filecheck=GLSL): -target glsl -entry computeMain -stage compute
+//TEST:SIMPLE(filecheck=METAL): -target metal -entry computeMain -stage compute
+//TEST:SIMPLE(filecheck=CPP): -target cpp -entry computeMain -stage compute
+//TEST:SIMPLE(filecheck=SPIRV): -target spirv -entry computeMain -stage compute
+
+// HLSL: computeMain
+// GLSL: main
+// METAL: computeMain
+// CPP: computeMain
+// SPIRV: OpEntryPoint
+
+struct PowActivationEx : IDifferentiable
+{
+	float power;
+}
+RWStructuredBuffer<float> return_value;
+
+[numthreads(256, 1, 1)]
+void computeMain()
+{
+    PowActivationEx args;
+	return_value[0] = args.power;
+}
\ No newline at end of file