1 files changed, 73 insertions, 0 deletions
diff --git a/cfg/CFGNode.java b/cfg/CFGNode.java
new file mode 100644
index 0000000..e604753
--- /dev/null
+++ b/cfg/CFGNode.java
@@ -0,0 +1,73 @@
+package cfg;
+
+import misc.*;
+import cs132.vapor.ast.*;
+
+import java.util.*;
+
+public class CFGNode {
+
+    private Node instruction;
+    private ArrayList<CFGNode> sources;
+    private ArrayList<CFGNode> dests;
+    protected Set<String> reaching;
+    protected Set<String> liveness;
+
+    public CFGNode(Node instruction) {
+        this.instruction = instruction;
+        this.sources = new ArrayList<>();
+        this.dests = new ArrayList<>();
+        this.reaching = new HashSet<>();
+        this.liveness = new HashSet<>();
+    }
+
+    public String toString() {
+        return String.format("L%d",
+                             this.instruction.sourcePos.line);
+    }
+
+    /**
+     * For if we only have a line
+     * number. (VBranch issues)
+     */
+    public boolean equals(Object other) {
+        return (other instanceof CFGNode &&
+                (((CFGNode) other).instruction ==
+                 this.instruction)) ||
+            (other instanceof Node &&
+             (((Node) other).sourcePos ==
+              this.instruction.sourcePos)) ||
+            (other instanceof Integer &&
+             (((Integer) other)
+              .equals(this.instruction.sourcePos.line)));
+    }
+
+    protected void addSource(CFGNode node) {
+        this.sources.add(node);
+    }
+
+    protected void addDest(CFGNode node) {
+        this.dests.add(node);
+    }
+
+    public Node getInstruction() {
+        return this.instruction;
+    }
+
+    public List<CFGNode> getSources() {
+        return Collections.unmodifiableList(this.sources);
+    }
+
+    public List<CFGNode> getDests() {
+        return Collections.unmodifiableList(this.dests);
+    }
+
+    public Set<String> getReaching() {
+        return Collections.unmodifiableSet(this.reaching);
+    }
+
+    public Set<String> getLiveness() {
+        return Collections.unmodifiableSet(this.liveness);
+    }
+
+}