From c0943661e5441bfb996430c4f67fb4dddea9dfcf Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Tue, 20 Oct 2020 19:07:14 -0700
Subject: Bottleneck interface dispatch calls through a single function.
 (#1584)

---
 source/slang/slang-ir.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

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

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
 
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