From 9c11a87f8f811a9a110d73a24ab93443ea347506 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Fri, 1 Sep 2023 01:25:31 -0700
Subject: Fix GLSL code gen around RayQuery and HitObject types. (#3173)

* Update slang-llvm.

* Fix.

* fix.

* Fix unit tests for multi-thread execution.

* Fix tests.

* fixes.

* update tests.

* Add gfx-smoke to linux expected failure list.

* Try fix test.

---------

Co-authored-by: Yong He <yhe@nvidia.com>
---
 source/slang/slang-check-decl.cpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'source/slang/slang-check-decl.cpp')

diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index f25821dac..76ab8655a 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -5615,6 +5615,39 @@ namespace Slang
             paramDecl->type = typeExpr;
             checkMeshOutputDecl(paramDecl);
         }
+
+        if (auto declRefType = as<DeclRefType>(paramDecl->type.type))
+        {
+            if (declRefType->getDeclRef().getDecl()->findModifier<NonCopyableTypeAttribute>())
+            {
+                // Always pass a non-copyable type by reference.
+                // Remove all existing direction modifiers, and replace them with a single Ref modifier.
+                List<Modifier*> newModifiers;
+                bool hasRefModifier = false;
+                for (auto modifier : paramDecl->modifiers)
+                {
+                    if (as<InModifier>(modifier) || as<InOutModifier>(modifier) || as<OutModifier>(modifier))
+                    {
+                        continue;
+                    }
+                    if (as<RefModifier>(modifier))
+                    {
+                        hasRefModifier = true;
+                    }
+                    newModifiers.add(modifier);
+                }
+                if (!hasRefModifier)
+                    newModifiers.add(this->getASTBuilder()->create<RefModifier>());
+                paramDecl->modifiers.first = newModifiers.getFirst();
+                for (Index i = 0; i < newModifiers.getCount(); i++)
+                {
+                    if (i < newModifiers.getCount() - 1)
+                        newModifiers[i]->next = newModifiers[i + 1];
+                    else
+                        newModifiers[i]->next = nullptr;
+                }
+            }
+        }
     }
 
     // This checks that the declaration is marked as "out" and changes the hlsl
-- 
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