Pointer layout support (#2930)

* WIP looking at reflection with pointers.

* Added GetPointerLayout.

* Initial test via reflection with layout of ptr type.

* WIP handles ptrs to types that have layout that hasn't been completed.

* Move tests to ptr.

* WIP try to take into account lowering correctly between AggTypeDecl and Type, but doesn't quite work.

* WIP a different path to handling recursive lowering problem with Ptr.

* Fix issues with reflection output.

* Small tidy.

* Fix for infinite recursion issue.

* Lower IRPointerTypeLayout

* Working with generics.
Has a hack to work around Layout around Ptr in IR.
The reflection around the generic - the name isn't much use, it should probably have the generic parameters, but that would require getName to do something more sophisticated.

* Fix issue around calling finishOuterGenerics to early.

* Remove feature/ptr test.

* Fix type legalization being an infinite loop with Ptr self referencing.

* Disable the pointer self reference test because produces an infintie loop on emit.

* Fixed comment based on review.

* Fix for issue with emit and pointers causing infinite recursion.

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/reflection/ptr/ptr-struct.slang b/tests/reflection/ptr/ptr-struct.slang
new file mode 100644
index 000000000..ee11ca240
--- /dev/null
+++ b/tests/reflection/ptr/ptr-struct.slang
@@ -0,0 +1,27 @@
+//TEST(64-bit):REFLECTION:-stage compute -no-codegen -target host-callable -entry computeMain
+
+struct AnotherStruct
+{
+    float a;
+    int b;
+    Ptr<int> ptrC;
+};
+
+struct SomeStruct
+{    
+    Ptr<int> ptrInt;
+    int* ptrInt2;
+    int anInt;
+    AnotherStruct another;
+    Ptr<AnotherStruct> anotherPtr;
+};
+
+RWStructuredBuffer<SomeStruct> inputBuffer;
+
+RWStructuredBuffer<int> outputBuffer;
+
+[numthreads(4, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{    
+    outputBuffer[dispatchThreadID.x] = int(dispatchThreadID.x);
+}
\ No newline at end of file