From fa8c11ebe8f9b1bf2174a5a4dbe92a34c16811c8 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Wed, 12 Jun 2024 09:27:14 -0700
Subject: Add option to preserve shader parameter declaration in output SPIRV.
 (#4344)

* Add option to preserve shader parameter declarations in output.

* Add test.
---
 source/slang/slang-emit-spirv.cpp | 3 +++
 1 file changed, 3 insertions(+)

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

diff --git a/source/slang/slang-emit-spirv.cpp b/source/slang/slang-emit-spirv.cpp
index fd4b1d491..10c263793 100644
--- a/source/slang/slang-emit-spirv.cpp
+++ b/source/slang/slang-emit-spirv.cpp
@@ -6431,10 +6431,13 @@ SlangResult emitSPIRVFromIR(
     }
 #endif
 
+    auto shouldPreserveParams = codeGenContext->getTargetProgram()->getOptionSet().getBoolOption(CompilerOptionName::PreserveParameters);
     for (auto inst : irModule->getGlobalInsts())
     {
         if (as<IRDebugSource>(inst))
             context.ensureInst(inst);
+        if (shouldPreserveParams && as<IRGlobalParam>(inst))
+            context.ensureInst(inst);
     }
 
     // Emit source language info.
-- 
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