Cleanups to `ParameterBlock<T>` behavior. (#304)

* Cleanups to `ParameterBlock<T>` behavior.

These add some more realistic tests using the `ParameterBlock<T>` support, and show that it can work with the "rewriter" mode.

Unfortunately, this code does *not* currently work with the rewriter + the IR at once. That will need to be fixed in a follow-on change, because I now see that the root problem is pretty ugly.

* cleanup

1 files changed, 32 insertions, 0 deletions

diff --git a/tests/compute/rewriter-parameter-block-complex.hlsl b/tests/compute/rewriter-parameter-block-complex.hlsl
new file mode 100644
index 000000000..4dc312f95
--- /dev/null
+++ b/tests/compute/rewriter-parameter-block-complex.hlsl
@@ -0,0 +1,32 @@
+//TEST(compute):HLSL_COMPUTE:-xslang -no-checking
+//TEST(compute):COMPARE_COMPUTE:-xslang -use-ir
+
+// Doesn't work with IR yet.
+//DISABLED_TEST(compute):HLSL_COMPUTE:-xslang -no-checking -xslang -use-ir
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):dxbinding(0),glbinding(0),out
+
+//TEST_INPUT:cbuffer(data=[256]):dxbinding(0),glbinding(0)
+//TEST_INPUT:ubuffer(data=[0 1 2 3], stride=4):dxbinding(1),glbinding(1)
+
+//TEST_INPUT:cbuffer(data=[4096]):dxbinding(1),glbinding(1)
+//TEST_INPUT:ubuffer(data=[16 32 48 64], stride=4):dxbinding(2),glbinding(2)
+
+// Test that we can declare a `ParameterBlock<...>` type as a shader
+// parameter (potentially nested inside a `cbuffer`) and use it in
+// shader code processed by the "rewriter"
+
+import rewriter_parameter_block_complex;
+
+RWStructuredBuffer<int> outputBuffer : register(u0);
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+	uint tid = dispatchThreadID.x;
+	int inVal = tid;
+
+	int outVal = test(gA, inVal) + test(gB, inVal);
+
+	outputBuffer[tid] = outVal;
+}
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