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.

1 files changed, 1 insertions, 0 deletions

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");