From 6209f69f335a604604a5032b0f5c38b4b8bc861a Mon Sep 17 00:00:00 2001
From: Darren Wihandi <65404740+fairywreath@users.noreply.github.com>
Date: Fri, 23 May 2025 00:57:08 -0400
Subject: Add default constructor for Ptr type (#7214)

* Add default constructor for Ptr type

* Make pointers c-style type, remove __init() constructor
---
 source/slang/slang-check-conversion.cpp       |  3 ++-
 tests/spirv/pointer-default-constructor.slang | 26 ++++++++++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 tests/spirv/pointer-default-constructor.slang

diff --git a/source/slang/slang-check-conversion.cpp b/source/slang/slang-check-conversion.cpp
index 705da89e3..fcbc83673 100644
--- a/source/slang/slang-check-conversion.cpp
+++ b/source/slang/slang-check-conversion.cpp
@@ -246,7 +246,8 @@ bool SemanticsVisitor::isCStyleType(Type* type, HashSet<Type*>& isVisit)
 
     // 1. It has to be basic scalar, vector or matrix type, or user-defined struct.
     if (as<VectorExpressionType>(type) || as<MatrixExpressionType>(type) ||
-        as<BasicExpressionType>(type) || isDeclRefTypeOf<EnumDecl>(type).getDecl())
+        as<BasicExpressionType>(type) || isDeclRefTypeOf<EnumDecl>(type).getDecl() ||
+        as<PtrType>(type))
         return cacheResult(true);
 
 
diff --git a/tests/spirv/pointer-default-constructor.slang b/tests/spirv/pointer-default-constructor.slang
new file mode 100644
index 000000000..6ab29f125
--- /dev/null
+++ b/tests/spirv/pointer-default-constructor.slang
@@ -0,0 +1,26 @@
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-vk -emit-spirv-directly -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<uint> outputBuffer;
+
+struct MyStruct
+{
+    int* ptr;
+}
+
+[shader("compute")]
+[numthreads(1, 1, 1)]
+void computeMain()
+{
+    float* a = {};
+    MyStruct ms = {};
+
+    // CHECK: 0
+    outputBuffer[0] = uint(uint64_t(a));
+    // CHECK: 1
+    outputBuffer[1] = uint(a == nullptr);
+    // CHECK: 0
+    outputBuffer[2] = uint(uint64_t(ms.ptr));
+    // CHECK: 1
+    outputBuffer[3] = uint(ms.ptr == nullptr);
+}
-- 
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