Fix hw1 fuzzer again

src/opt/deadcode.rs

@@ -0,0 +1,14 @@
+use crate::ir::*;
+use crate::opt::FunctionPass;
+use crate::*;
+
+pub type Deadcode = FunctionPass<DeadcodeInner>;
+
+#[derive(Default)]
+pub struct DeadcodeInner {}
+
+impl Optimize<FunctionDefinition> for DeadcodeInner {
+    fn optimize(&mut self, _code: &mut FunctionDefinition) -> bool {
+        todo!("homework 6")
+    }
+}