From d40931cc8bde13520ea45769cf94e7cc6cc9065f Mon Sep 17 00:00:00 2001
From: Ellie Hermaszewska <ellieh@nvidia.com>
Date: Fri, 15 Mar 2024 08:48:41 +0800
Subject: Mesh shader refactoring and bugfixes (#3702)

---
 source/slang/slang-emit-hlsl.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'source/slang/slang-emit-hlsl.cpp')

diff --git a/source/slang/slang-emit-hlsl.cpp b/source/slang/slang-emit-hlsl.cpp
index fcab737e1..cf1ca794b 100644
--- a/source/slang/slang-emit-hlsl.cpp
+++ b/source/slang/slang-emit-hlsl.cpp
@@ -1206,10 +1206,11 @@ void HLSLSourceEmitter::emitMeshShaderModifiersImpl(IRInst* varInst)
 {
     if(auto modifier = varInst->findDecoration<IRMeshOutputDecoration>())
     {
+        // DXC requires that mesh payload parameters have "out" specified
         const char* s =
-              as<IRVerticesDecoration>(modifier)   ? "vertices "
-            : as<IRIndicesDecoration>(modifier)    ? "indices "
-            : as<IRPrimitivesDecoration>(modifier) ? "primitives "
+              as<IRVerticesDecoration>(modifier)   ? "out vertices "
+            : as<IRIndicesDecoration>(modifier)    ? "out indices "
+            : as<IRPrimitivesDecoration>(modifier) ? "out primitives "
             : nullptr;
         SLANG_ASSERT(s && "Unhandled type of mesh output decoration");
         m_writer->emit(s);
-- 
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