Support pointers in SPIRV. (#3561)

* Support pointers in SPIRV.

* Fix test.

* Enhance test.

* Fix test.

* Cleanup.

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/spirv/pointer.slang b/tests/spirv/pointer.slang
new file mode 100644
index 000000000..cb2d56f66
--- /dev/null
+++ b/tests/spirv/pointer.slang
@@ -0,0 +1,48 @@
+//TEST:SIMPLE(filecheck=CHECK): -target spirv -entry main -stage compute -emit-spirv-directly
+
+
+struct PP
+{
+    int data;
+    int data2;
+}
+struct Data
+{
+    int data;
+    PP* pNext;
+};
+
+void funcThatTakesPointer(PP* p)
+{
+    p.data = 2;
+}
+int* funcThatReturnsPointer(PP* p)
+{
+    return &p.data;
+}
+
+// CHECK: OpEntryPoint
+
+StructuredBuffer<Data> buffer;
+RWStructuredBuffer<int> output;
+void main(int id : SV_DispatchThreadID)
+{
+    output[0] = buffer[0].pNext.data;
+    let pData = &(buffer[0].pNext.data);
+    // CHECK: OpPtrAccessChain
+    int* pData1 = pData + 1;
+    *pData1 = 3;
+    *(int2*)pData = int2(1, 2);
+    pData1[-1] = 2;
+    buffer[0].pNext[1] = {5};
+    // CHECK: OpConvertPtrToU
+    // CHECK: OpINotEqual
+    if (pData1)
+    {
+        *(funcThatReturnsPointer(buffer[0].pNext)) = 4;
+    }
+    if (pData1 > pData)
+    {
+        funcThatTakesPointer(buffer[0].pNext);
+    }
+}