Allow dynamic dispatch to handle nested interface-typed fields. (#2336)

2 files changed, 61 insertions, 0 deletions

diff --git a/tests/bugs/nested-existential-dyndispatch.slang b/tests/bugs/nested-existential-dyndispatch.slang
new file mode 100644
index 000000000..b6689b54d
--- /dev/null
+++ b/tests/bugs/nested-existential-dyndispatch.slang
@@ -0,0 +1,56 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+interface IFoo
+{
+    float sample();
+}
+
+//TEST_INPUT: type_conformance Bar:IBar = 0
+[anyValueSize(64)]
+interface IBar
+{
+    float sample();
+}
+
+//TEST_INPUT: type_conformance Foo:IFoo = 0
+struct Foo : IFoo
+{
+    float3 albedo;
+    float sample()
+    {
+        return albedo.x;
+    }
+}
+
+struct Bar : IBar
+{
+    IFoo foo;
+    float sample()
+    {
+        return foo.sample();
+    }
+}
+
+struct AnyVal
+{
+    uint data[16];
+}
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID: SV_DispatchThreadID)
+{
+    int index = dispatchThreadID.x;
+
+    Foo f;
+    f.albedo = float3(1.0);
+    Bar bar;
+    bar.foo = f;
+
+    AnyVal data = reinterpret<AnyVal, Bar>(bar);
+    IBar dynBar = createDynamicObject<IBar, AnyVal>(0, data);
+
+    outputBuffer[index] = dynBar.sample();
+}
diff --git a/tests/bugs/nested-existential-dyndispatch.slang.expected.txt b/tests/bugs/nested-existential-dyndispatch.slang.expected.txt
new file mode 100644
index 000000000..24e3a50ad
--- /dev/null
+++ b/tests/bugs/nested-existential-dyndispatch.slang.expected.txt
@@ -0,0 +1,5 @@
+type: float
+1.0
+1.0
+1.0
+1.0
\ No newline at end of file