From 97cd64f86f937b849d2ddaea53030c515d8b5df8 Mon Sep 17 00:00:00 2001
From: Andrew Hickman <andrew.hickman1@sky.com>
Date: Mon, 23 Dec 2019 15:51:26 +0000
Subject: [PATCH] Add some logging to optimize code

---
 src/optimize/inline_iife.rs | 2 ++
 src/optimize/inline_let.rs  | 2 ++
 src/optimize/mod.rs         | 5 +++++
 3 files changed, 9 insertions(+)

diff --git a/src/optimize/inline_iife.rs b/src/optimize/inline_iife.rs
index dc6abe1..9a5f6cb 100644
--- a/src/optimize/inline_iife.rs
+++ b/src/optimize/inline_iife.rs
@@ -15,6 +15,8 @@ impl Transform for InlineIife {
             let changes = transform(nodes, id);
             cost = 1 + cost.saturating_sub(changes);
         });
+
+        log::debug!("Applied inline_iife transform. Cost: {:?}", cost);
         cost
     }
 }
diff --git a/src/optimize/inline_let.rs b/src/optimize/inline_let.rs
index d25f17b..f687b5e 100644
--- a/src/optimize/inline_let.rs
+++ b/src/optimize/inline_let.rs
@@ -16,6 +16,8 @@ impl Transform for InlineLet {
             let changes = transform(nodes, id);
             cost = 1 + cost.saturating_sub(changes);
         });
+
+        log::debug!("Applied inline_let transform. Cost: {:?}", cost);
         cost
     }
 }
diff --git a/src/optimize/mod.rs b/src/optimize/mod.rs
index a98c0fe..cb6ede2 100644
--- a/src/optimize/mod.rs
+++ b/src/optimize/mod.rs
@@ -24,6 +24,11 @@ pub fn optimize(expr: &mut ir::Expr, opts: Opts) {
     while budget != 0 {
         let cost = pass.transform(expr);
         budget = budget.saturating_sub(cost);
+        log::debug!(
+            "Applied optimisation pass. Total cost: {}. Remaining budget: {}",
+            cost,
+            budget
+        );
     }
 }