Fix the logic to determine whether lower generic pass should run. (#5837)

1 files changed, 8 insertions, 1 deletions

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;