Direct SPIRV for RayTracing Inline. (#3201)

* Direct SPIRV for RayTracing Inline.

* Fix.

* Cleanup.

* Fix compile error.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/source/slang/slang-lower-to-ir.cpp b/source/slang/slang-lower-to-ir.cpp
index 106e5b5a3..8d1a86d4d 100644
--- a/source/slang/slang-lower-to-ir.cpp
+++ b/source/slang/slang-lower-to-ir.cpp
@@ -2537,12 +2537,18 @@ ParameterDirection getParameterDirection(VarDeclBase* paramDecl)
     ///
 ParameterDirection getThisParamDirection(Decl* parentDecl, ParameterDirection defaultDirection)
 {
+    auto parentParent = getParentDecl(parentDecl);
     // The `this` parameter for a `class` is always `in`.
-    if (as<ClassDecl>(parentDecl->parentDecl))
+    if (as<ClassDecl>(parentParent))
     {
         return kParameterDirection_In;
     }
 
+    if (parentParent->findModifier<NonCopyableTypeAttribute>())
+    {
+        return kParameterDirection_Ref;
+    }
+
     // Applications can opt in to a mutable `this` parameter,
     // by applying the `[mutating]` attribute to their
     // declaration.