move function parallelism to pass and pass runner, which allows more efficient parallel execution (#564)

1 files changed, 3 insertions, 1 deletions

diff --git a/src/passes/DeadCodeElimination.cpp b/src/passes/DeadCodeElimination.cpp
index e6669fdd9..08515753c 100644
--- a/src/passes/DeadCodeElimination.cpp
+++ b/src/passes/DeadCodeElimination.cpp
@@ -35,7 +35,9 @@
 namespace wasm {
 
 struct DeadCodeElimination : public WalkerPass<PostWalker<DeadCodeElimination, Visitor<DeadCodeElimination>>> {
-  bool isFunctionParallel() { return true; }
+  bool isFunctionParallel() override { return true; }
+
+  Pass* create() override { return new DeadCodeElimination; }
 
   // whether the current code is actually reachable
   bool reachable = true;