//! Optimization passes for WAFER's IR.
//!
//! Each pass is a function `Vec<IrOp> -> Vec<IrOp>`, composable in sequence:
//! 1. Constant folding
//! 2. Strength reduction
//! 3. Peephole optimization
//! 4. Inlining
//! 5. Dead code elimination
//! 6. Stack-to-local promotion

// TODO: Step 11 - Optimization pass implementations

#[cfg(test)]
mod tests {
    #[test]
    fn placeholder() {
        // Optimizer tests will be added in Step 11
    }
}