Fix up emission of shader parameter semantics when using IR (#226)

* Fix up emission of shader parameter semantics when using IR

- Make sure to propagate entry point parameter layouts down to IR parameters when doing the initial cloning to form target-specific IR

- When layout information is present on an IR node, prefer to use that over the original high-level declaration for outputting semantics in final HLSL

- Fix up test runner to generate `.actual` files when running compute tests, in cases where the `render-test` application errors out (e.g., because of a Slang compilation error)

- Add a first test of generics functionality, to show that they generate valid code through the IR
  - Right now this test is *not* using any "interesting" operations on the type parameter, so this is not a test that can confirm that interface constraints work

* fixup: skip compute tests when running on Linux

2 files changed, 30 insertions, 0 deletions

diff --git a/tests/compute/generics-simple.slang b/tests/compute/generics-simple.slang
new file mode 100644
index 000000000..0002e444b
--- /dev/null
+++ b/tests/compute/generics-simple.slang
@@ -0,0 +1,26 @@
+//TEST(smoke,compute):COMPARE_COMPUTE:-xslang -use-ir
+
+// Confirm that generics syntax can be used in user
+// code and generates valid output.
+
+RWStructuredBuffer<float> outputBuffer;
+
+
+__generic<T>
+T test(T val)
+{
+	return val;
+}
+
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+	uint tid = dispatchThreadID.x;
+
+	float inVal = float(tid);
+
+	float outVal = test<float>(inVal);
+
+	outputBuffer[tid] = outVal;
+}
\ No newline at end of file
diff --git a/tests/compute/generics-simple.slang.expected.txt b/tests/compute/generics-simple.slang.expected.txt
new file mode 100644
index 000000000..fdaa30664
--- /dev/null
+++ b/tests/compute/generics-simple.slang.expected.txt
@@ -0,0 +1,4 @@
+0.0
+1.0
+2.0
+3.0
\ No newline at end of file