Lift math on dynamic constants in IR to dynamic constant math

• Lift math in IR nodes to dynamic constant math.

hercules_opt/src/dce.rs

@@ -8,7 +8,7 @@ use crate::*;
  */
 pub fn dce(editor: &mut FunctionEditor) {
     // Create worklist (starts as all nodes).
-    let mut worklist: Vec<NodeID> = (0..editor.func().nodes.len()).map(NodeID::new).collect();
+    let mut worklist: Vec<NodeID> = editor.node_ids().collect();
 
     while let Some(work) = worklist.pop() {
         // If a node on the worklist is a start node, it is either *the* start