From b4badb815ec844e438a05d501eafb6bb99383bc6 Mon Sep 17 00:00:00 2001
From: "Alon Zakai (kripken)" <alonzakai@gmail.com>
Date: Sun, 2 Dec 2018 08:22:33 -0800
Subject: Run coalesce-locals after the final simplify-locals.

We now emit more sets and tees of if-elses from simplify-locals, and
coalesce-locals is necessary to remove them if they are ineffectual,
that is, if no get will read them.
---
 src/passes/pass.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index e89fed83f..c42a3d144 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -180,8 +180,11 @@ void PassRunner::addDefaultFunctionOptimizationPasses() {
   }
   add("coalesce-locals");
   add("simplify-locals");
-  add("vacuum"); // previous pass creates garbage
+  add("vacuum");
+  add("reorder-locals");
+  add("coalesce-locals");
   add("reorder-locals");
+  add("vacuum");
   if (options.optimizeLevel >= 3 || options.shrinkLevel >= 1) {
     add("code-folding");
   }
-- 
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