Add raypayload decoration to ray payload structs (#6164)

* Add raypayload decoration to ray payload structs

Closes https://github.com/shader-slang/slang/issues/6104

* Disable PAQs when compiling with DXC

See https://github.com/shader-slang/slang/issues/3448

1 files changed, 9 insertions, 0 deletions

diff --git a/source/slang/slang-emit-hlsl.cpp b/source/slang/slang-emit-hlsl.cpp
index ff4514d69..1cb9b769f 100644
--- a/source/slang/slang-emit-hlsl.cpp
+++ b/source/slang/slang-emit-hlsl.cpp
@@ -1669,6 +1669,15 @@ void HLSLSourceEmitter::emitPostKeywordTypeAttributesImpl(IRInst* inst)
     {
         m_writer->emit("[payload] ");
     }
+    // This can be re-enabled when we add PAQs: https://github.com/shader-slang/slang/issues/3448
+    const bool enablePAQs = false;
+    if (enablePAQs)
+    {
+        if (const auto payloadDecoration = inst->findDecoration<IRRayPayloadDecoration>())
+        {
+            m_writer->emit("[raypayload] ");
+        }
+    }
 }
 
 void HLSLSourceEmitter::_emitPrefixTypeAttr(IRAttr* attr)