Initial work

Ryujinx.Graphics.Shader/StructuredIr/AstAssignment.cs

@@ -0,0 +1,35 @@
+using static Ryujinx.Graphics.Shader.StructuredIr.AstHelper;
+
+namespace Ryujinx.Graphics.Shader.StructuredIr
+{
+    class AstAssignment : AstNode
+    {
+        public IAstNode Destination { get; }
+
+        private IAstNode _source;
+
+        public IAstNode Source
+        {
+            get
+            {
+                return _source;
+            }
+            set
+            {
+                RemoveUse(_source, this);
+
+                AddUse(value, this);
+
+                _source = value;
+            }
+        }
+
+        public AstAssignment(IAstNode destination, IAstNode source)
+        {
+            Destination = destination;
+            Source      = source;
+
+            AddDef(destination, this);
+        }
+    }
+}