[async-functions] support await expressions in finally statements

src/interpreter/bytecode-generator.h

Index: src/interpreter/bytecode-generator.h
diff --git a/src/interpreter/bytecode-generator.h b/src/interpreter/bytecode-generator.h
index f15829dea82514ca6f8fb7ebbebbcd16e3afdaa7..51111b443d27562b4ac00e3f5bc2ac99ec66675a 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -164,6 +164,27 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   void VisitForTest(Expression* expr, BytecodeLabels* then_labels,
                     BytecodeLabels* else_labels, TestFallthrough fallthrough);
 
+  void BuildYield(int yield_id, Yield::OnException on_exception, Register value,
+                  int position);
+  void BuildAwait(int yield_id, Yield::OnException on_exception, Register value,
+                  int position);
+  void BuildYieldResumePoint(int yield_id, Yield::OnException on_exception,
+                             int position);
+
+  void BuildTryCatch(HandlerTable::CatchPrediction catch_prediction,
+                     std::function<void()> build_try,
+                     std::function<void(Register context)> build_catch);
+  void BuildTryFinally(std::function<void()> build_try,
+                       std::function<void()> build_finally);
+  void BuildTryCatchFinally(HandlerTable::CatchPrediction catch_prediction,
+                            std::function<void()> build_try,
+                            std::function<void(Register context)> build_catch,
+                            std::function<void()> build_finally);
+
+  // If FLAG_trace is enabled, invoke Runtime::kTraceExit with the return value
+  // in the accumulator. The return value is restored on exit.
+  void BuildTraceExit();
+
   // Returns the runtime function id for a store to super for the function's
   // language mode.
   inline Runtime::FunctionId StoreToSuperRuntimeId();
@@ -219,7 +240,10 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
 
   ZoneVector<BytecodeLabel> generator_resume_points_;
   Register generator_state_;
+  Register generator_object_;
+  Register promise_;
   int loop_depth_;
+  HandlerTable::CatchPrediction catch_prediction_;
 
   Handle<Name> home_object_symbol_;
   Handle<Name> iterator_symbol_;