From a5d3bec25d70f23da1e79cd7773981ff34593611 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 15 Sep 2022 20:37:45 -0700
Subject: Run simple compute kernel in gfx-smoke test. (#2400)

---
 source/slang/slang-ir-util.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'source/slang/slang-ir-util.cpp')

diff --git a/source/slang/slang-ir-util.cpp b/source/slang/slang-ir-util.cpp
index 7775fdb91..1f13eb754 100644
--- a/source/slang/slang-ir-util.cpp
+++ b/source/slang/slang-ir-util.cpp
@@ -53,7 +53,10 @@ bool isComInterfaceType(IRType* type)
     {
         return true;
     }
-
+    if (auto witnessTableType = as<IRWitnessTableTypeBase>(type))
+    {
+        return isComInterfaceType((IRType*)witnessTableType->getConformanceType());
+    }
     if (auto ptrType = as<IRNativePtrType>(type))
     {
         auto valueType = ptrType->getValueType();
-- 
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