From 3f12964b24f8829a4548f634463492f02b7de913 Mon Sep 17 00:00:00 2001
From: jarcherNV <jarcher@nvidia.com>
Date: Mon, 4 Aug 2025 12:26:30 -0700
Subject: Add support for pointer literals in metal (#8040)

Add support for kIROp_PtrLit types in metal and add a test for null pointer
values, which is the only valid value.
---
 source/slang/slang-emit-metal.cpp  |  5 +++++
 tests/metal/pointer-literals.slang | 30 ++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 tests/metal/pointer-literals.slang

diff --git a/source/slang/slang-emit-metal.cpp b/source/slang/slang-emit-metal.cpp
index d3b00d57d..7dd0c19ad 100644
--- a/source/slang/slang-emit-metal.cpp
+++ b/source/slang/slang-emit-metal.cpp
@@ -937,6 +937,11 @@ bool MetalSourceEmitter::tryEmitInstExprImpl(IRInst* inst, const EmitOpInfo& inO
             }
             return true;
         }
+    case kIROp_PtrLit:
+        {
+            m_writer->emit("nullptr");
+            return true;
+        }
     default:
         break;
     }
diff --git a/tests/metal/pointer-literals.slang b/tests/metal/pointer-literals.slang
new file mode 100644
index 000000000..327d488d2
--- /dev/null
+++ b/tests/metal/pointer-literals.slang
@@ -0,0 +1,30 @@
+//TEST:SIMPLE(filecheck=METAL): -target metal -stage compute -entry computeMain
+//TEST:SIMPLE(filecheck=METALLIB): -target metallib -stage compute -entry computeMain
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<uint> outputBuffer;
+
+//METAL: {{\[\[}}kernel{{\]\]}} void computeMain
+//METALLIB: define void @computeMain
+
+// Test that pointer literals are handled correctly in Metal.
+
+[numthreads(1,1,1)]
+void computeMain()
+{
+    // Test pointer literals in some contexts that might generate kIROp_PtrLit.
+
+    // Test 1: Basic pointer literal assignment
+    void* ptr1 = nullptr;
+    outputBuffer[0] = (ptr1 == nullptr) ? 1 : 0;
+    
+    // Test 2: Pointer literal in struct
+    struct TestStruct
+    {
+        void* ptr;
+        int value;
+    };
+
+    TestStruct test = { nullptr, 42 };
+    outputBuffer[1] = (test.ptr == nullptr) ? 1 : 0;
+}
\ No newline at end of file
-- 
cgit v1.2.3