From c17369a507c9b2e3a2db409896dbdc7e250122c1 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Wed, 11 Dec 2024 14:19:00 -0800
Subject: Fix the logic to determine whether lower generic pass should run.
 (#5837)

---
 source/slang/slang-emit.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'source')

diff --git a/source/slang/slang-emit.cpp b/source/slang/slang-emit.cpp
index 04ad55c1f..f9118bb45 100644
--- a/source/slang/slang-emit.cpp
+++ b/source/slang/slang-emit.cpp
@@ -429,7 +429,14 @@ void calcRequiredLoweringPassSet(
     {
         // If any instruction has an interface type, we need to run
         // the generics lowering pass.
-        auto type = inst->getDataType();
+        auto type = as<IRType>(inst) ? inst : inst->getDataType();
+        for (;;)
+        {
+            if (auto ptrType = as<IRPtrTypeBase>(type))
+                type = ptrType->getValueType();
+            else
+                break;
+        }
         if (type && type->getOp() == kIROp_InterfaceType)
         {
             result.generics = true;
-- 
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