wasm2js: run more optimizations (#2073)

In particular, coalesce-locals is useful even if closure is run later (apparently it finds stuff closure can't).

1 files changed, 3 insertions, 2 deletions

diff --git a/src/wasm2js.h b/src/wasm2js.h
index 18175d443..385f8877e 100644
--- a/src/wasm2js.h
+++ b/src/wasm2js.h
@@ -291,10 +291,11 @@ Ref Wasm2JSBuilder::processWasm(Module* wasm, Name funcName) {
     // Finally, get the code into the flat form we need for wasm2js itself, and
     // optimize that a little in a way that keeps flat property.
     runner.add("flatten");
+    runner.add("remove-unused-names");
+    runner.add("merge-blocks");
     runner.add("simplify-locals-notee-nostructure");
-    // TODO: coalesce-locals?
+    runner.add("coalesce-locals");
     runner.add("reorder-locals");
-    runner.add("remove-unused-names");
     runner.add("vacuum");
     runner.add("remove-unused-module-elements");
     runner.setDebug(flags.debug);