1 files changed, 46 insertions, 0 deletions
diff --git a/ARMeilleure/Translation/SsaDeconstruction.cs b/ARMeilleure/Translation/SsaDeconstruction.cs
new file mode 100644
index 00000000..2ba78bdf
--- /dev/null
+++ b/ARMeilleure/Translation/SsaDeconstruction.cs
@@ -0,0 +1,46 @@
+using ARMeilleure.IntermediateRepresentation;
+using System.Collections.Generic;
+
+using static ARMeilleure.IntermediateRepresentation.OperandHelper;
+
+namespace ARMeilleure.Translation
+{
+    static partial class Ssa
+    {
+        public static void Deconstruct(ControlFlowGraph cfg)
+        {
+            foreach (BasicBlock block in cfg.Blocks)
+            {
+                LinkedListNode<Node> node = block.Operations.First;
+
+                while (node?.Value is PhiNode phi)
+                {
+                    LinkedListNode<Node> nextNode = node.Next;
+
+                    Operand local = Local(phi.Destination.Type);
+
+                    for (int index = 0; index < phi.SourcesCount; index++)
+                    {
+                        BasicBlock predecessor = phi.GetBlock(index);
+
+                        Operand source = phi.GetSource(index);
+
+                        predecessor.Append(new Operation(Instruction.Copy, local, source));
+
+                        phi.SetSource(index, null);
+                    }
+
+                    Operation copyOp = new Operation(Instruction.Copy, phi.Destination, local);
+
+                    block.Operations.AddBefore(node, copyOp);
+
+                    phi.Destination = null;
+
+                    block.Operations.Remove(node);
+
+                    node = nextNode;
+                }
+            }
+        }
+    }
+}
+\ No newline at end of file