[wasm] Separate compilation from instantiation

src/wasm/wasm-module.h

Index: src/wasm/wasm-module.h
diff --git a/src/wasm/wasm-module.h b/src/wasm/wasm-module.h
index 1da17ba91d51837344b4b8e8e27a70606913abda..7e009de05ecf5496653a4825da48bf7342f14260 100644
--- a/src/wasm/wasm-module.h
+++ b/src/wasm/wasm-module.h
@@ -210,6 +210,8 @@ struct WasmModule {
   // Creates a new instantiation of the module in the given isolate.
   MaybeHandle<JSObject> Instantiate(Isolate* isolate, Handle<JSReceiver> ffi,
                                     Handle<JSArrayBuffer> memory) const;
+
+  Handle<FixedArray> Compile(Isolate* isolate) const;
 };
 
 // An instantiated WASM module, including memory, function table, etc.
@@ -232,6 +234,7 @@ struct WasmModuleInstance {
   explicit WasmModuleInstance(const WasmModule* m)
       : module(m),
         function_code(m->functions.size()),
+        import_code(m->import_table.size()),
         mem_start(nullptr),
         mem_size(0),
         globals_start(nullptr) {}