From 6a51af5d858b6d3378749d17065c44cf50b62a26 Mon Sep 17 00:00:00 2001
From: Sam Clegg <sbc@chromium.org>
Date: Fri, 10 Apr 2020 01:01:23 -0400
Subject: Remove writes to globals that are never written to (#2741)

Since the global is never read, we know that any write operation
will be unobservable.
---
 src/passes/pass.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/passes/pass.cpp')

diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index 733b61467..4da870ae9 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -483,6 +483,7 @@ void PassRunner::addDefaultGlobalOptimizationPostPasses() {
   } else {
     add("simplify-globals");
   }
+  add("vacuum"); // simplify-globals can generate extra nops
   add("remove-unused-module-elements");
   // may allow more inlining/dae/etc., need --converge for that
   add("directize");
-- 
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