Added `[AutoPyBindCUDA]` for automatic kernel binding + `[PyExport]` for exporting type information (#3209)

* Initial: add a DiffTensor impl

* Auto-binding and diff tensor implementations now work

* Refactored diff-tensor implementation + added py-export for struct types

* Cleanup

* Update slang-ir-pytorch-cpp-binding.cpp

* Updated test names

* Update autodiff-data-flow.slang.expected

* Add more versions of load/store & default generic args for DiffTensorView.

* Add diagnostic for default generic arg and more tests

* Add more `[AutoPyBind]` tests

2 files changed, 57 insertions, 0 deletions

diff --git a/tests/compute/generic-default-arg.slang b/tests/compute/generic-default-arg.slang
new file mode 100644
index 000000000..8762f5e8a
--- /dev/null
+++ b/tests/compute/generic-default-arg.slang
@@ -0,0 +1,53 @@
+//TEST(compute):COMPARE_COMPUTE: -shaderobj
+//TEST(compute):COMPARE_COMPUTE:-cpu -shaderobj
+
+// Check that user code can declare and use a generic
+// `struct` type.
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+interface ITest
+{
+	int doThing(int x);
+};
+
+struct Impl1 : ITest
+{
+	int doThing(int x)
+	{
+		return x * 2;
+	}
+};
+
+struct Impl2 : ITest
+{
+    int doThing(int x)
+    {
+        return x * 3;
+    }
+};
+
+__generic<T : ITest = Impl1>
+struct GenStruct
+{
+	T obj;
+};
+
+int test(GenStruct gs, int val)
+{
+	return gs.obj.doThing(val);
+}
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+	int tid = dispatchThreadID.x;
+
+	int outVal = 0;
+
+	GenStruct<Impl1> gs;
+	outVal += test(gs, tid);
+
+	outputBuffer[tid] = outVal;
+}
\ No newline at end of file
diff --git a/tests/compute/generic-default-arg.slang.expected.txt b/tests/compute/generic-default-arg.slang.expected.txt
new file mode 100644
index 000000000..e1e8ccec4
--- /dev/null
+++ b/tests/compute/generic-default-arg.slang.expected.txt
@@ -0,0 +1,4 @@
+0
+2
+4
+6