2 files changed, 14 insertions, 2 deletions
diff --git a/src/passes/DeadCodeElimination.cpp b/src/passes/DeadCodeElimination.cpp
index 9562b2973..de1191131 100644
--- a/src/passes/DeadCodeElimination.cpp
+++ b/src/passes/DeadCodeElimination.cpp
@@ -40,7 +40,12 @@ struct DeadCodeElimination : public WalkerPass<PostWalker<DeadCodeElimination, V
   Pass* create() override { return new DeadCodeElimination; }
 
   // whether the current code is actually reachable
-  bool reachable = true;
+  bool reachable;
+
+  void doWalkFunction(Function* func) {
+    reachable = true;
+    walk(func->body);
+  }
 
   std::set<Name> reachableBreaks;
 
diff --git a/src/passes/pass.cpp b/src/passes/pass.cpp
index e04033d90..f27eccf6a 100644
--- a/src/passes/pass.cpp
+++ b/src/passes/pass.cpp
@@ -149,7 +149,14 @@ void PassRunner::run() {
         std::cerr << ' ';
       }
       before = std::chrono::high_resolution_clock::now();
-      pass->run(this, wasm);
+      if (pass->isFunctionParallel()) {
+        // function-parallel passes should get a new instance per function
+        for (auto& func : wasm->functions) {
+          runPassOnFunction(pass, func.get());
+        }
+      } else {
+        pass->run(this, wasm);
+      }
       auto after = std::chrono::high_resolution_clock::now();
       std::chrono::duration<double> diff = after - before;
       std::cerr << diff.count() << " seconds." << std::endl;