From e5b796db188416dfc414dab27b92c86b0b53de2b Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 10 Sep 2020 15:10:11 -0700
Subject: Allow existential types in `StructuredBuffer` element type. (#1536)

* Allow existential types in `StructuredBuffer` element type.

* Handle StructuredBuffer.Load/.Consume methods

* Clean up unnecessary changes

* Code cleanup

* Update test comment
---
 tests/compute/dynamic-dispatch-13.slang            | 45 ++++++++++++++++++++++
 .../compute/dynamic-dispatch-13.slang.expected.txt |  4 ++
 2 files changed, 49 insertions(+)
 create mode 100644 tests/compute/dynamic-dispatch-13.slang
 create mode 100644 tests/compute/dynamic-dispatch-13.slang.expected.txt

(limited to 'tests')

diff --git a/tests/compute/dynamic-dispatch-13.slang b/tests/compute/dynamic-dispatch-13.slang
new file mode 100644
index 000000000..723f42f52
--- /dev/null
+++ b/tests/compute/dynamic-dispatch-13.slang
@@ -0,0 +1,45 @@
+// Test using interface typed shader parameters wrapped inside a `StructuredBuffer`.
+
+//TEST(compute):COMPARE_COMPUTE:-cpu
+//DISABLE_TEST(compute):COMPARE_COMPUTE:-cuda -xslang -disable-specialization
+
+[anyValueSize(8)]
+interface IInterface
+{
+    int run(int input);
+}
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=gOutputBuffer
+RWStructuredBuffer<int> gOutputBuffer;
+
+//TEST_INPUT:ubuffer(data=[rtti(MyImpl) witness(MyImpl, IInterface) 1 0], stride=4):name=gCb
+StructuredBuffer<IInterface> gCb;
+
+//TEST_INPUT:ubuffer(data=[rtti(MyImpl) witness(MyImpl, IInterface) 1 0], stride=4):name=gCb1
+StructuredBuffer<IInterface> gCb1;
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3       dispatchThreadID : SV_DispatchThreadID)
+{
+    let tid = dispatchThreadID.x;
+
+    let inputVal : int = tid;
+    IInterface v0 = gCb.Load(0);
+    IInterface v1 = gCb1[0];
+    let outputVal = v0.run(inputVal) + v1.run(inputVal);
+
+    gOutputBuffer[tid] = outputVal;
+}
+
+// Specialize gCb1, but not gCb2
+//TEST_INPUT: globalExistentialType MyImpl
+//TEST_INPUT: globalExistentialType __Dynamic
+// Type must be marked `public` to ensure it is visible in the generated DLL.
+public struct MyImpl : IInterface
+{
+    int val;
+    int run(int input)
+    {
+        return input + val;
+    }
+};
diff --git a/tests/compute/dynamic-dispatch-13.slang.expected.txt b/tests/compute/dynamic-dispatch-13.slang.expected.txt
new file mode 100644
index 000000000..628d2a8fd
--- /dev/null
+++ b/tests/compute/dynamic-dispatch-13.slang.expected.txt
@@ -0,0 +1,4 @@
+2
+4
+6
+8
-- 
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