Bottleneck interface dispatch calls through a single function. (#1584)

1 files changed, 11 insertions, 0 deletions

diff --git a/source/slang/slang-ir.cpp b/source/slang/slang-ir.cpp
index 6f0cc43e2..778f066dd 100644
--- a/source/slang/slang-ir.cpp
+++ b/source/slang/slang-ir.cpp
@@ -5559,5 +5559,16 @@ namespace Slang
     {
         return inst->findDecoration<IRBuiltinDecoration>() != nullptr;
     }
+    IRFunc* getParentFunc(IRInst* inst)
+    {
+        auto parent = inst->getParent();
+        while (parent)
+        {
+            if (auto func = as<IRFunc>(parent))
+                return func;
+            parent = parent->getParent();
+        }
+        return nullptr;
+    }
 } // namespace Slang