From 147ceb1991454b7a5ba6f3ec0c149dd40360a31d Mon Sep 17 00:00:00 2001
From: Sai Praveen Bangaru <31557731+saipraveenb25@users.noreply.github.com>
Date: Thu, 14 Nov 2024 12:06:17 -0500
Subject: Fix issue with raw default constructors in SPIRV emit (#5556)

---
 source/slang/slang-ir-strip-default-construct.cpp | 45 +++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 source/slang/slang-ir-strip-default-construct.cpp

(limited to 'source/slang/slang-ir-strip-default-construct.cpp')

diff --git a/source/slang/slang-ir-strip-default-construct.cpp b/source/slang/slang-ir-strip-default-construct.cpp
new file mode 100644
index 000000000..ea141d2fd
--- /dev/null
+++ b/source/slang/slang-ir-strip-default-construct.cpp
@@ -0,0 +1,45 @@
+// slang-ir-strip-default-construct.cpp
+#include "slang-ir-strip-default-construct.h"
+
+#include "slang-ir-inst-pass-base.h"
+#include "slang-ir-insts.h"
+#include "slang-ir.h"
+
+namespace Slang
+{
+
+struct RemoveDefaultConstructInsts : InstPassBase
+{
+    RemoveDefaultConstructInsts(IRModule* module)
+        : InstPassBase(module)
+    {
+    }
+    void processModule()
+    {
+        processInstsOfType<IRDefaultConstruct>(
+            kIROp_DefaultConstruct,
+            [&](IRDefaultConstruct* defaultConstruct)
+            {
+                List<IRInst*> instsToRemove;
+                for (auto use = defaultConstruct->firstUse; use; use = use->nextUse)
+                {
+                    if (as<IRStore>(use->getUser()))
+                        instsToRemove.add(use->getUser());
+                    else
+                        return; // Ignore this inst if there are non-store uses.
+                }
+
+                for (auto inst : instsToRemove)
+                    inst->removeAndDeallocate();
+
+                defaultConstruct->removeAndDeallocate();
+            });
+    }
+};
+
+void removeRawDefaultConstructors(IRModule* module)
+{
+    RemoveDefaultConstructInsts(module).processModule();
+}
+
+} // namespace Slang
-- 
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