Adds a --metrics command line argument to print metrics about .wast files between optimization passes.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/pass.h b/src/pass.h
index f8b56aff6..a95be9850 100644
--- a/src/pass.h
+++ b/src/pass.h
@@ -94,6 +94,8 @@ public:
   // Override this to perform preparation work before the pass runs.
   virtual void prepare(PassRunner* runner, Module* module) {}
   virtual void run(PassRunner* runner, Module* module) = 0;
+  // Override this to perform finalization work after the pass runs.
+  virtual void finalize(PassRunner* runner, Module* module) {}
 protected:
   Pass() {}
   Pass(Pass &) {}
@@ -110,6 +112,7 @@ public:
   void run(PassRunner* runner, Module* module) override {
     prepare(runner, module);
     WalkerType::startWalk(module);
+    finalize(runner, module);
   }
 };