Make non-Module generators only context allocate parameters.

In particular, local variables should be allocated on stack (in bytecode register), and stored/loaded to the generator object on generator suspend/resume.

The CL is based on @adamk's change to scoping/parsers (https://chromium-review.googlesource.com/c/498538/), I only made the debugger cope with this change.

I should note that the CL changes the scope type of suspended generators from ScopeType.Closure to ScopeType.Local. In the future we might want to introduce ScopeType.SuspendedGenerator to make the distinction explicit.

Some of the changes in the tests have been made because the debugger functions do not return scopes of closed generators anymore. Generators should be allowed to throw away their internal state when they finish.

BUG=v8:6368

Review-Url: https://codereview.chromium.org/2898163002
Cr-Commit-Position: refs/heads/master@{#45515}

src/ast/scopes.cc

@@ -348,6 +348,7 @@ void Scope::SetDefaults() {
 
   inner_scope_calls_eval_ = false;
   force_context_allocation_ = false;
+  force_context_allocation_for_parameters_ = false;
 
   is_declaration_scope_ = false;
 
@@ -2193,7 +2194,8 @@ void DeclarationScope::AllocateParameterLocals() {
 
 void DeclarationScope::AllocateParameter(Variable* var, int index) {
   if (MustAllocate(var)) {
-    if (MustAllocateInContext(var)) {
+    if (has_forced_context_allocation_for_parameters() ||
+        MustAllocateInContext(var)) {
       DCHECK(var->IsUnallocated() || var->IsContextSlot());
       if (var->IsUnallocated()) {
         AllocateHeapSlot(var);

src/ast/scopes.h

@@ -323,6 +323,13 @@ class V8_EXPORT_PRIVATE Scope : public NON_EXPORTED_BASE(ZoneObject) {
   bool has_forced_context_allocation() const {
     return force_context_allocation_;
   }
+  void ForceContextAllocationForParameters() {
+    DCHECK(!already_resolved_);
+    force_context_allocation_for_parameters_ = true;
+  }
+  bool has_forced_context_allocation_for_parameters() const {
+    return force_context_allocation_for_parameters_;
+  }
 
   // ---------------------------------------------------------------------------
   // Predicates.
@@ -574,6 +581,7 @@ class V8_EXPORT_PRIVATE Scope : public NON_EXPORTED_BASE(ZoneObject) {
   // True if one of the inner scopes or the scope itself calls eval.
   bool inner_scope_calls_eval_ : 1;
   bool force_context_allocation_ : 1;
+  bool force_context_allocation_for_parameters_ : 1;
 
   // True if it holds 'var' declarations.
   bool is_declaration_scope_ : 1;

src/debug/debug-scopes.cc

@@ -30,16 +30,20 @@ ScopeIterator::ScopeIterator(Isolate* isolate, FrameInspector* frame_inspector,
     return;
   }
 
-  context_ = Handle<Context>::cast(frame_inspector->GetContext());
-
   // We should not instantiate a ScopeIterator for wasm frames.
   DCHECK(frame_inspector->GetScript()->type() != Script::TYPE_WASM);
 
+  TryParseAndRetrieveScopes(option);
+}
+
+void ScopeIterator::TryParseAndRetrieveScopes(ScopeIterator::Option option) {
+  context_ = GetContext();
+
   // Catch the case when the debugger stops in an internal function.
   Handle<JSFunction> function = GetFunction();
   Handle<SharedFunctionInfo> shared_info(function->shared());
   Handle<ScopeInfo> scope_info(shared_info->scope_info());
-  if (shared_info->script()->IsUndefined(isolate)) {
+  if (shared_info->script()->IsUndefined(isolate_)) {
     while (context_->closure() == *function) {
       context_ = Handle<Context>(context_->previous(), isolate_);
     }
@@ -54,7 +58,8 @@ ScopeIterator::ScopeIterator(Isolate* isolate, FrameInspector* frame_inspector,
   // and include nested scopes into the "fast" iteration case as well.
   bool ignore_nested_scopes = (option == IGNORE_NESTED_SCOPES);
   bool collect_non_locals = (option == COLLECT_NON_LOCALS);
-  if (!ignore_nested_scopes && shared_info->HasDebugInfo()) {
+  if (!ignore_nested_scopes && shared_info->HasDebugInfo() &&
+      frame_inspector_ != nullptr) {
     // The source position at return is always the end of the function,
     // which is not consistent with the current scope chain. Therefore all
     // nested with, catch and block contexts are skipped, and we can only
@@ -109,8 +114,8 @@ ScopeIterator::ScopeIterator(Isolate* isolate, FrameInspector* frame_inspector,
     // Inner function.
     info.reset(new ParseInfo(shared_info));
   }
-  if (parsing::ParseAny(info.get(), isolate) &&
-      Rewriter::Rewrite(info.get(), isolate)) {
+  if (parsing::ParseAny(info.get(), isolate_) &&
+      Rewriter::Rewrite(info.get(), isolate_)) {
     DeclarationScope* scope = info->literal()->scope();
     if (!ignore_nested_scopes || collect_non_locals) {
       CollectNonLocals(info.get(), scope);
@@ -136,7 +141,6 @@ ScopeIterator::ScopeIterator(Isolate* isolate, FrameInspector* frame_inspector,
 
 ScopeIterator::ScopeIterator(Isolate* isolate, Handle<JSFunction> function)
     : isolate_(isolate),
-      frame_inspector_(NULL),
       context_(function->context()),
       seen_script_scope_(false) {
   if (!function->shared()->IsSubjectToDebugging()) context_ = Handle<Context>();
@@ -146,13 +150,14 @@ ScopeIterator::ScopeIterator(Isolate* isolate, Handle<JSFunction> function)
 ScopeIterator::ScopeIterator(Isolate* isolate,
                              Handle<JSGeneratorObject> generator)
     : isolate_(isolate),
-      frame_inspector_(NULL),
+      generator_(generator),
       context_(generator->context()),
       seen_script_scope_(false) {
   if (!generator->function()->shared()->IsSubjectToDebugging()) {
     context_ = Handle<Context>();
+    return;
   }
-  UnwrapEvaluationContext();
+  TryParseAndRetrieveScopes(DEFAULT);
 }
 
 void ScopeIterator::UnwrapEvaluationContext() {
@@ -459,10 +464,36 @@ void ScopeIterator::DebugPrint() {
 }
 #endif
 
+inline Handle<Context> ScopeIterator::GetContext() {
+  if (frame_inspector_) {
+    return Handle<Context>::cast(frame_inspector_->GetContext());
+  } else {
+    DCHECK(!generator_.is_null());
+    return handle(generator_->context());
+  }
+}
+
+Handle<JSFunction> ScopeIterator::GetFunction() {
+  if (frame_inspector_) {
+    return frame_inspector_->GetFunction();
+  } else {
+    DCHECK(!generator_.is_null());
+    return handle(generator_->function());
+  }
+}
+
+int ScopeIterator::GetSourcePosition() {
+  if (frame_inspector_) {
+    return frame_inspector_->GetSourcePosition();
+  } else {
+    DCHECK(!generator_.is_null());
+    return generator_->source_position();
+  }
+}
+
 void ScopeIterator::RetrieveScopeChain(DeclarationScope* scope) {
   DCHECK_NOT_NULL(scope);
-  int source_position = frame_inspector_->GetSourcePosition();
-  GetNestedScopeChain(isolate_, scope, source_position);
+  GetNestedScopeChain(isolate_, scope, GetSourcePosition());
 }
 
 void ScopeIterator::CollectNonLocals(ParseInfo* info, DeclarationScope* scope) {
@@ -490,20 +521,41 @@ MaybeHandle<JSObject> ScopeIterator::MaterializeScriptScope() {
   return script_scope;
 }
 
+void ScopeIterator::MaterializeStackLocals(Handle<JSObject> local_scope,
+                                           Handle<ScopeInfo> scope_info) {
+  if (frame_inspector_) {
+    return frame_inspector_->MaterializeStackLocals(local_scope, scope_info);
+  }
+
+  DCHECK(!generator_.is_null());
+  // Fill all stack locals.
+  Handle<FixedArray> register_file(generator_->register_file());
+  for (int i = 0; i < scope_info->StackLocalCount(); ++i) {
+    Handle<String> name = handle(scope_info->StackLocalName(i));
+    if (ScopeInfo::VariableIsSynthetic(*name)) continue;
+    Handle<Object> value(register_file->get(scope_info->StackLocalIndex(i)),
+                         isolate_);
+    // TODO(yangguo): We convert optimized out values to {undefined} when they
+    // are passed to the debugger. Eventually we should handle them somehow.
+    if (value->IsTheHole(isolate_) || value->IsOptimizedOut(isolate_)) {
+      DCHECK(!value.is_identical_to(isolate_->factory()->stale_register()));
+      value = isolate_->factory()->undefined_value();
+    }
+    JSObject::SetOwnPropertyIgnoreAttributes(local_scope, name, value, NONE)
+        .Check();
+  }
+}
 
 MaybeHandle<JSObject> ScopeIterator::MaterializeLocalScope() {
-  Handle<JSFunction> function = GetFunction();
+  Handle<JSFunction> function(GetFunction());
+  Handle<SharedFunctionInfo> shared(function->shared());
+  Handle<ScopeInfo> scope_info(shared->scope_info());
 
   Handle<JSObject> local_scope =
       isolate_->factory()->NewJSObjectWithNullProto();
-  frame_inspector_->MaterializeStackLocals(local_scope, function);
+  MaterializeStackLocals(local_scope, scope_info);
 
-  Handle<Context> frame_context =
-      Handle<Context>::cast(frame_inspector_->GetContext());
-
-  HandleScope scope(isolate_);
-  Handle<SharedFunctionInfo> shared(function->shared());
-  Handle<ScopeInfo> scope_info(shared->scope_info());
+  Handle<Context> frame_context = GetContext();
 
   if (!scope_info->HasContext()) return local_scope;
 
@@ -585,7 +637,7 @@ Handle<JSObject> ScopeIterator::MaterializeInnerScope() {
   Handle<Context> context = Handle<Context>::null();
   if (!nested_scope_chain_.is_empty()) {
     Handle<ScopeInfo> scope_info = nested_scope_chain_.last().scope_info;
-    frame_inspector_->MaterializeStackLocals(inner_scope, scope_info);
+    MaterializeStackLocals(inner_scope, scope_info);
     if (scope_info->HasContext()) context = CurrentContext();
   } else {
     context = CurrentContext();
@@ -615,14 +667,19 @@ MaybeHandle<JSObject> ScopeIterator::MaterializeModuleScope() {
 }
 
 bool ScopeIterator::SetParameterValue(Handle<ScopeInfo> scope_info,
-                                      JavaScriptFrame* frame,
                                       Handle<String> parameter_name,
                                       Handle<Object> new_value) {
   // Setting stack locals of optimized frames is not supported.
-  if (frame->is_optimized()) return false;
   HandleScope scope(isolate_);
   for (int i = 0; i < scope_info->ParameterCount(); ++i) {
     if (String::Equals(handle(scope_info->ParameterName(i)), parameter_name)) {
+      // Suspended generators should not get here because all parameters should
+      // be context-allocated.
+      DCHECK_NOT_NULL(frame_inspector_);
+      JavaScriptFrame* frame = GetFrame();
+      if (frame->is_optimized()) {
+        return false;
+      }
       frame->SetParameterValue(i, *new_value);
       return true;
     }
@@ -633,14 +690,24 @@ bool ScopeIterator::SetParameterValue(Handle<ScopeInfo> scope_info,
 bool ScopeIterator::SetStackVariableValue(Handle<ScopeInfo> scope_info,
                                           Handle<String> variable_name,
                                           Handle<Object> new_value) {
-  if (frame_inspector_ == nullptr) return false;
-  JavaScriptFrame* frame = GetFrame();
-  // Setting stack locals of optimized frames is not supported.
-  if (frame->is_optimized()) return false;
+  // Setting stack locals of optimized frames is not supported. Suspended
+  // generators are supported.
   HandleScope scope(isolate_);
   for (int i = 0; i < scope_info->StackLocalCount(); ++i) {
     if (String::Equals(handle(scope_info->StackLocalName(i)), variable_name)) {
-      frame->SetExpression(scope_info->StackLocalIndex(i), *new_value);
+      int stack_local_index = scope_info->StackLocalIndex(i);
+      if (frame_inspector_ != nullptr) {
+        // Set the variable on the stack.
+        JavaScriptFrame* frame = GetFrame();
+        if (frame->is_optimized()) return false;
+        frame->SetExpression(stack_local_index, *new_value);
+      } else {
+        // Set the variable in the suspended generator.
+        DCHECK(!generator_.is_null());
+        Handle<FixedArray> register_file(generator_->register_file());
+        DCHECK_LT(stack_local_index, register_file->length());
+        register_file->set(stack_local_index, *new_value);
+      }
       return true;
     }
   }
@@ -683,11 +750,10 @@ bool ScopeIterator::SetContextVariableValue(Handle<ScopeInfo> scope_info,
 
 bool ScopeIterator::SetLocalVariableValue(Handle<String> variable_name,
                                           Handle<Object> new_value) {
-  JavaScriptFrame* frame = GetFrame();
-  Handle<ScopeInfo> scope_info(frame->function()->shared()->scope_info());
+  Handle<ScopeInfo> scope_info(GetFunction()->shared()->scope_info());
 
   // Parameter might be shadowed in context. Don't stop here.
-  bool result = SetParameterValue(scope_info, frame, variable_name, new_value);
+  bool result = SetParameterValue(scope_info, variable_name, new_value);
 
   // Stack locals.
   if (SetStackVariableValue(scope_info, variable_name, new_value)) {
@@ -839,7 +905,7 @@ void ScopeIterator::GetNestedScopeChain(Isolate* isolate, Scope* scope,
   if (scope->is_function_scope()) {
     // Do not collect scopes of nested inner functions inside the current one.
     // Nested arrow functions could have the same end positions.
-    Handle<JSFunction> function = frame_inspector_->GetFunction();
+    Handle<JSFunction> function = GetFunction();
     if (scope->start_position() > function->shared()->start_position() &&
         scope->end_position() <= function->shared()->end_position()) {
       return;

src/debug/debug-scopes.h

@@ -93,7 +93,8 @@ class ScopeIterator {
   };
 
   Isolate* isolate_;
-  FrameInspector* const frame_inspector_;
+  FrameInspector* const frame_inspector_ = nullptr;
+  Handle<JSGeneratorObject> generator_;
   Handle<Context> context_;
   List<ExtendedScopeInfo> nested_scope_chain_;
   Handle<StringSet> non_locals_;
@@ -103,9 +104,14 @@ class ScopeIterator {
     return frame_inspector_->GetArgumentsFrame();
   }
 
-  inline Handle<JSFunction> GetFunction() {
-    return frame_inspector_->GetFunction();
-  }
+  Handle<Context> GetContext();
+  Handle<JSFunction> GetFunction();
+  int GetSourcePosition();
+
+  void MaterializeStackLocals(Handle<JSObject> local_scope,
+                              Handle<ScopeInfo> scope_info);
+
+  void TryParseAndRetrieveScopes(ScopeIterator::Option option);
 
   void RetrieveScopeChain(DeclarationScope* scope);
 
@@ -133,7 +139,7 @@ class ScopeIterator {
                              Handle<Object> new_value);
 
   // Helper functions.
-  bool SetParameterValue(Handle<ScopeInfo> scope_info, JavaScriptFrame* frame,
+  bool SetParameterValue(Handle<ScopeInfo> scope_info,
                          Handle<String> parameter_name,
                          Handle<Object> new_value);
   bool SetStackVariableValue(Handle<ScopeInfo> scope_info,

src/parsing/parser.cc

@@ -706,6 +706,7 @@ FunctionLiteral* Parser::DoParseProgram(ParseInfo* info) {
       var->AllocateTo(VariableLocation::PARAMETER, 0);
 
       PrepareGeneratorVariables();
+      scope->ForceContextAllocation();
       Expression* initial_yield =
           BuildInitialYield(kNoSourcePosition, kGeneratorFunction);
       body->Add(
@@ -2531,11 +2532,9 @@ void Parser::DeclareArrowFunctionFormalParameters(
 }
 
 void Parser::PrepareGeneratorVariables() {
-  // For generators, allocating variables in contexts is currently a win because
-  // it minimizes the work needed to suspend and resume an activation.  The
-  // code produced for generators relies on this forced context allocation (it
-  // does not restore the frame's parameters upon resume).
-  function_state_->scope()->ForceContextAllocation();
+  // The code produced for generators relies on forced context allocation of
+  // parameters (it does not restore the frame's parameters upon resume).
+  function_state_->scope()->ForceContextAllocationForParameters();
 
   // Calling a generator returns a generator object.  That object is stored
   // in a temporary variable, a definition that is used by "yield"

src/runtime/runtime-debug.cc

@@ -921,6 +921,11 @@ RUNTIME_FUNCTION(Runtime_GetGeneratorScopeCount) {
   // Check arguments.
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, gen, 0);
 
+  // Only inspect suspended generator scopes.
+  if (!gen->is_suspended()) {
+    return Smi::kZero;
+  }
+
   // Count the visible scopes.
   int n = 0;
   for (ScopeIterator it(isolate, gen); !it.Done(); it.Next()) {
@@ -942,6 +947,11 @@ RUNTIME_FUNCTION(Runtime_GetGeneratorScopeDetails) {
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, gen, 0);
   CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
 
+  // Only inspect suspended generator scopes.
+  if (!gen->is_suspended()) {
+    return isolate->heap()->undefined_value();
+  }
+
   // Find the requested scope.
   int n = 0;
   ScopeIterator it(isolate, gen);

test/cctest/interpreter/bytecode_expectations/ForAwaitOf.golden

@@ -14,424 +14,354 @@ snippet: "
   }
   f();
 "
-frame size: 18
+frame size: 30
 parameter count: 1
-bytecode array length: 922
+bytecode array length: 724
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(16),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(15),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(3), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(17),
+                B(CallRuntime), U16(Runtime::kAbort), R(17), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(12),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(15),
+                B(Mov), R(closure), R(17),
+                B(Mov), R(this), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(17), U8(2),
+                B(Star), R(2),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(5),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(5), U8(1),
-                B(StaCurrentContextSlot), U8(10),
-                B(Mov), R(context), R(7),
-                B(Mov), R(context), R(8),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(3),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(17),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(17), U8(1),
+                B(Star), R(8),
+                B(Mov), R(context), R(19),
+                B(Mov), R(context), R(20),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Mov), R(context), R(11),
-                B(Mov), R(context), R(12),
-  /*   43 S> */ B(CreateArrayLiteral), U8(4), U8(3), U8(17),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(5), U8(8),
+                B(Star), R(6),
+                B(Mov), R(context), R(23),
+                B(Mov), R(context), R(24),
+  /*   43 S> */ B(CreateArrayLiteral), U8(3), U8(3), U8(17),
+                B(Star), R(25),
+                B(LdaNamedProperty), R(25), U8(4), U8(8),
                 B(JumpIfUndefined), U8(17),
                 B(JumpIfNull), U8(15),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(10),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(25), U8(10),
                 B(JumpIfJSReceiver), U8(23),
                 B(CallRuntime), U16(Runtime::kThrowSymbolAsyncIteratorInvalid), R(0), U8(0),
-                B(LdaNamedProperty), R(13), U8(6), U8(4),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(6),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateAsyncFromSyncIterator), R(14), U8(1),
-  /*   43 E> */ B(StaContextSlot), R(1), U8(6), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(7), U8(1), I8(0),
+                B(LdaNamedProperty), R(25), U8(5), U8(4),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(25), U8(6),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateAsyncFromSyncIterator), R(26), U8(1),
+                B(Star), R(4),
+                B(Ldar), R(15),
+                B(SwitchOnSmiNoFeedback), U8(6), U8(1), I8(0),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   43 E> */ B(TestEqualStrictNoFeedback), R(15),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kAbort), R(13), U8(1),
-  /*   40 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(15),
-                B(LdaNamedProperty), R(15), U8(8), U8(14),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(15), U8(12),
-                B(StaContextSlot), R(1), U8(9), U8(0),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kAbort), R(25), U8(1),
+  /*   40 S> */ B(LdaNamedProperty), R(4), U8(7), U8(14),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(4), U8(12),
+                B(Star), R(7),
   /*   40 S> */ B(LdaUndefined),
-                B(Star), R(14),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(16),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(17),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(14), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(14),
+                B(Star), R(26),
+                B(Mov), R(2), R(27),
+                B(Mov), R(7), R(28),
+                B(Mov), R(8), R(29),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(26), U8(4),
                 B(LdaZero),
-                B(SuspendGenerator), R(13), U8(2),
-                B(Ldar), R(14),
+                B(Mov), R(2), R(25),
+                B(Mov), R(8), R(26),
+                B(SuspendGenerator), R(25), U8(2),
+                B(Ldar), R(26),
   /*   57 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
                 B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(25), U8(1),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(25), U8(1),
+                B(Star), R(27),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(15),
+                B(TestEqualStrictNoFeedback), R(27),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(15),
+                B(TestEqualStrictNoFeedback), R(27),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(17),
-                B(Mov), R(14), R(16),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
-                B(Star), R(10),
+                B(Star), R(29),
+                B(Mov), R(26), R(28),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(28), U8(2),
+                B(Star), R(22),
                 B(LdaZero),
-                B(Star), R(9),
-                B(Jump), U8(155),
-                B(Ldar), R(14),
+                B(Star), R(21),
+                B(Jump), U8(101),
+                B(Ldar), R(26),
                 B(ReThrow),
-                B(Ldar), R(14),
-  /*   40 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(14), U8(1),
+                B(Mov), R(26), R(5),
+  /*   40 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(5), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(13), U8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(9), U8(16),
-                B(JumpIfToBooleanTrue), U8(56),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(10), U8(18),
-                B(StaContextSlot), R(1), U8(11), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(5), U8(1),
+                B(LdaNamedProperty), R(5), U8(8), U8(16),
+                B(JumpIfToBooleanTrue), U8(25),
+                B(LdaNamedProperty), R(5), U8(9), U8(18),
+                B(Star), R(9),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(StaContextSlot), R(1), U8(5), U8(0),
+                B(Star), R(6),
+                B(Mov), R(9), R(3),
   /*   23 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(11),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-                B(PopContext), R(2),
+                B(Mov), R(3), R(0),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(JumpLoop), U8(219), I8(0),
-                B(Jump), U8(48),
-                B(Star), R(13),
+                B(Star), R(6),
+                B(JumpLoop), U8(150), I8(0),
+                B(Jump), U8(40),
+                B(Star), R(25),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(12), U8(13),
-                B(Star), R(12),
+                B(CreateCatchContext), R(25), U8(10), U8(11),
+                B(Star), R(24),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(13),
+                B(Ldar), R(24),
+                B(PushContext), R(14),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(13), U8(20),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(6), U8(20),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(8), U8(0),
+                B(Star), R(6),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kReThrow), R(13), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kReThrow), R(25), U8(1),
+                B(PopContext), R(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(9),
+                B(Star), R(21),
                 B(Jump), U8(8),
-                B(Star), R(10),
+                B(Star), R(22),
                 B(LdaSmi), I8(1),
-                B(Star), R(9),
+                B(Star), R(21),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
+                B(Star), R(23),
                 B(LdaZero),
-                B(TestEqualStrict), R(12), U8(21),
-                B(JumpIfTrueConstant), U8(18),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(14), U8(22),
-                B(StaContextSlot), R(1), U8(12), U8(0),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(TestEqualStrict), R(6), U8(21),
+                B(JumpIfTrueConstant), U8(15),
+                B(LdaNamedProperty), R(4), U8(12), U8(22),
+                B(Star), R(10),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(JumpConstant), U8(17),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(254),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(12), U8(25),
-                B(JumpIfFalse), U8(169),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(TestEqualStrict), R(6), U8(25),
+                B(JumpIfFalse), U8(142),
+                B(Ldar), R(10),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(12),
-                B(LdaConstant), U8(15),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(12), U8(2),
+                B(Star), R(24),
+                B(LdaConstant), U8(13),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(24), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(12),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(14),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(14), U8(2),
-                B(StaContextSlot), R(1), U8(13), U8(0),
+                B(Mov), R(context), R(24),
+                B(Mov), R(10), R(26),
+                B(Mov), R(4), R(27),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(26), U8(2),
+                B(Star), R(11),
                 B(LdaUndefined),
-                B(Star), R(14),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
-                B(Star), R(16),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(17),
-                B(CallJSRuntime), U8(%async_function_await_caught), R(14), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(14),
+                B(Star), R(26),
+                B(Mov), R(2), R(27),
+                B(Mov), R(11), R(28),
+                B(Mov), R(8), R(29),
+                B(CallJSRuntime), U8(%async_function_await_caught), R(26), U8(4),
                 B(LdaSmi), I8(1),
-                B(SuspendGenerator), R(13), U8(2),
-                B(Ldar), R(14),
+                B(Mov), R(2), R(25),
+                B(Mov), R(8), R(26),
+                B(SuspendGenerator), R(25), U8(2),
+                B(Ldar), R(26),
   /*   57 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
                 B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(25), U8(1),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(25), U8(1),
+                B(Star), R(27),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(27),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(27),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(17),
-                B(Mov), R(14), R(16),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(29),
+                B(Mov), R(26), R(28),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(28), U8(2),
+                B(Star), R(18),
                 B(LdaZero),
-                B(Star), R(5),
-                B(JumpConstant), U8(22),
-                B(Ldar), R(14),
+                B(Star), R(17),
+                B(Jump), U8(234),
+                B(Ldar), R(26),
                 B(ReThrow),
-                B(Ldar), R(14),
+                B(Ldar), R(26),
                 B(Jump), U8(20),
-                B(Star), R(13),
+                B(Star), R(25),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(12), U8(16),
-                B(Star), R(12),
+                B(CreateCatchContext), R(25), U8(10), U8(14),
+                B(Star), R(24),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(147),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(Ldar), R(24),
+                B(PushContext), R(14),
+                B(PopContext), R(14),
+                B(Jump), U8(107),
+                B(Mov), R(10), R(25),
+                B(Mov), R(4), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(25), U8(2),
                 B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(13), U8(2),
-                B(StaContextSlot), R(1), U8(15), U8(0),
                 B(LdaUndefined),
-                B(Star), R(13),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(14),
-                B(LdaContextSlot), R(1), U8(15), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(16),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(13), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(13),
+                B(Star), R(25),
+                B(Mov), R(2), R(26),
+                B(Mov), R(13), R(27),
+                B(Mov), R(8), R(28),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(25), U8(4),
                 B(LdaSmi), I8(2),
-                B(SuspendGenerator), R(12), U8(2),
-                B(Ldar), R(13),
+                B(Mov), R(2), R(24),
+                B(Mov), R(8), R(25),
+                B(SuspendGenerator), R(24), U8(2),
+                B(Ldar), R(25),
   /*   57 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(12), U8(1),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(12), U8(1),
-                B(Star), R(14),
+                B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(24), U8(1),
+                B(Star), R(25),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(24), U8(1),
+                B(Star), R(26),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(16),
-                B(Mov), R(13), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(28),
+                B(Mov), R(25), R(27),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(27), U8(2),
+                B(Star), R(18),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(148),
-                B(Ldar), R(13),
+                B(Star), R(17),
+                B(Jump), U8(121),
+                B(Ldar), R(25),
                 B(ReThrow),
-                B(Ldar), R(13),
-                B(StaContextSlot), R(1), U8(14), U8(0),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
+                B(Mov), R(25), R(12),
                 B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(Ldar), R(11),
+                B(Ldar), R(23),
                 B(SetPendingMessage),
-                B(Ldar), R(9),
-                B(SwitchOnSmiNoFeedback), U8(19), U8(2), I8(0),
-                B(Jump), U8(15),
-                B(PopContext), R(1),
+                B(Ldar), R(21),
+                B(SwitchOnSmiNoFeedback), U8(16), U8(2), I8(0),
+                B(Jump), U8(13),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Mov), R(10), R(6),
-                B(Jump), U8(93),
-                B(Ldar), R(10),
+                B(Star), R(17),
+                B(Mov), R(22), R(18),
+                B(Jump), U8(83),
+                B(Ldar), R(22),
                 B(ReThrow),
-                B(PopContext), R(1),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(10),
+                B(Star), R(21),
                 B(LdaUndefined),
-                B(Star), R(11),
-                B(CallJSRuntime), U8(%promise_resolve), R(9), U8(3),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(6),
+                B(Star), R(23),
+                B(Mov), R(8), R(22),
+                B(CallJSRuntime), U8(%promise_resolve), R(21), U8(3),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(65),
-                B(Jump), U8(51),
-                B(Star), R(9),
+                B(Star), R(17),
+                B(Mov), R(8), R(18),
+                B(Jump), U8(59),
+                B(Jump), U8(45),
+                B(Star), R(21),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(9), U8(12), U8(21),
-                B(Star), R(8),
+                B(CreateCatchContext), R(21), U8(10), U8(18),
+                B(Star), R(20),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(PushContext), R(1),
+                B(Ldar), R(20),
+                B(PushContext), R(14),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(10),
+                B(Star), R(21),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(11),
+                B(Star), R(23),
                 B(LdaFalse),
-                B(Star), R(12),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(9), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(24),
+                B(Mov), R(8), R(22),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(21), U8(4),
+                B(PopContext), R(14),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(17),
+                B(Mov), R(8), R(18),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(17),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(18),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
+                B(Star), R(17),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
+                B(Star), R(19),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(9),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(8), U8(2),
-                B(Ldar), R(7),
+                B(Star), R(20),
+                B(Mov), R(8), R(21),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(20), U8(2),
+                B(Ldar), R(19),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(23), U8(2), I8(0),
+                B(Ldar), R(17),
+                B(SwitchOnSmiNoFeedback), U8(19), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(6),
+                B(Ldar), R(18),
   /*   57 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(18),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   57 S> */ B(Return),
 ]
 constant pool: [
-  Smi [116],
-  Smi [544],
-  Smi [682],
-  FIXED_ARRAY_TYPE,
+  Smi [99],
+  Smi [401],
+  Smi [514],
   TUPLE2_TYPE,
   SYMBOL_TYPE,
   SYMBOL_TYPE,
-  Smi [83],
+  Smi [60],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
-  Smi [327],
-  Smi [350],
+  Smi [265],
   Smi [6],
-  Smi [16],
+  Smi [14],
   FIXED_ARRAY_TYPE,
-  Smi [286],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [60, 876, 882],
-  [63, 825, 827],
-  [80, 400, 406],
-  [83, 352, 354],
-  [493, 609, 611],
+  [56, 679, 685],
+  [59, 634, 636],
+  [65, 306, 312],
+  [68, 266, 268],
+  [373, 464, 466],
 ]
 
 ---
@@ -441,441 +371,368 @@ snippet: "
   }
   f();
 "
-frame size: 18
+frame size: 30
 parameter count: 1
-bytecode array length: 952
+bytecode array length: 752
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(16),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(15),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(3), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(17),
+                B(CallRuntime), U16(Runtime::kAbort), R(17), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(12),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(15),
+                B(Mov), R(closure), R(17),
+                B(Mov), R(this), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(17), U8(2),
+                B(Star), R(2),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(5),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(5), U8(1),
-                B(StaCurrentContextSlot), U8(10),
-                B(Mov), R(context), R(7),
-                B(Mov), R(context), R(8),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(3),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(17),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(17), U8(1),
+                B(Star), R(8),
+                B(Mov), R(context), R(19),
+                B(Mov), R(context), R(20),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Mov), R(context), R(11),
-                B(Mov), R(context), R(12),
-  /*   43 S> */ B(CreateArrayLiteral), U8(4), U8(3), U8(17),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(5), U8(8),
+                B(Star), R(6),
+                B(Mov), R(context), R(23),
+                B(Mov), R(context), R(24),
+  /*   43 S> */ B(CreateArrayLiteral), U8(3), U8(3), U8(17),
+                B(Star), R(25),
+                B(LdaNamedProperty), R(25), U8(4), U8(8),
                 B(JumpIfUndefined), U8(17),
                 B(JumpIfNull), U8(15),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(10),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(25), U8(10),
                 B(JumpIfJSReceiver), U8(23),
                 B(CallRuntime), U16(Runtime::kThrowSymbolAsyncIteratorInvalid), R(0), U8(0),
-                B(LdaNamedProperty), R(13), U8(6), U8(4),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(6),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateAsyncFromSyncIterator), R(14), U8(1),
-  /*   43 E> */ B(StaContextSlot), R(1), U8(6), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(7), U8(1), I8(0),
+                B(LdaNamedProperty), R(25), U8(5), U8(4),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(25), U8(6),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateAsyncFromSyncIterator), R(26), U8(1),
+                B(Star), R(4),
+                B(Ldar), R(15),
+                B(SwitchOnSmiNoFeedback), U8(6), U8(1), I8(0),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   43 E> */ B(TestEqualStrictNoFeedback), R(15),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kAbort), R(13), U8(1),
-  /*   40 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(15),
-                B(LdaNamedProperty), R(15), U8(8), U8(14),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(15), U8(12),
-                B(StaContextSlot), R(1), U8(9), U8(0),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kAbort), R(25), U8(1),
+  /*   40 S> */ B(LdaNamedProperty), R(4), U8(7), U8(14),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(4), U8(12),
+                B(Star), R(7),
   /*   40 S> */ B(LdaUndefined),
-                B(Star), R(14),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(16),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(17),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(14), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(14),
+                B(Star), R(26),
+                B(Mov), R(2), R(27),
+                B(Mov), R(7), R(28),
+                B(Mov), R(8), R(29),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(26), U8(4),
                 B(LdaZero),
-                B(SuspendGenerator), R(13), U8(2),
-                B(Ldar), R(14),
+                B(Mov), R(2), R(25),
+                B(Mov), R(8), R(26),
+                B(SuspendGenerator), R(25), U8(2),
+                B(Ldar), R(26),
   /*   68 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
                 B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(25), U8(1),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(25), U8(1),
+                B(Star), R(27),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(15),
+                B(TestEqualStrictNoFeedback), R(27),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(15),
+                B(TestEqualStrictNoFeedback), R(27),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(17),
-                B(Mov), R(14), R(16),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
-                B(Star), R(10),
+                B(Star), R(29),
+                B(Mov), R(26), R(28),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(28), U8(2),
+                B(Star), R(22),
                 B(LdaZero),
-                B(Star), R(9),
-                B(Jump), U8(157),
-                B(Ldar), R(14),
+                B(Star), R(21),
+                B(Jump), U8(104),
+                B(Ldar), R(26),
                 B(ReThrow),
-                B(Ldar), R(14),
-  /*   40 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(14), U8(1),
+                B(Mov), R(26), R(5),
+  /*   40 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(5), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(13), U8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(9), U8(16),
-                B(JumpIfToBooleanTrue), U8(58),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(10), U8(18),
-                B(StaContextSlot), R(1), U8(11), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(5), U8(1),
+                B(LdaNamedProperty), R(5), U8(8), U8(16),
+                B(JumpIfToBooleanTrue), U8(28),
+                B(LdaNamedProperty), R(5), U8(9), U8(18),
+                B(Star), R(9),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(StaContextSlot), R(1), U8(5), U8(0),
+                B(Star), R(6),
+                B(Mov), R(9), R(3),
   /*   23 E> */ B(StackCheck),
+                B(Mov), R(3), R(0),
+  /*   56 S> */ B(LdaSmi), I8(1),
+                B(Star), R(21),
+                B(Mov), R(0), R(22),
+                B(Jump), U8(54),
+                B(Jump), U8(40),
+                B(Star), R(25),
                 B(Ldar), R(closure),
-                B(CreateBlockContext), U8(11),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-  /*   56 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
-                B(PopContext), R(2),
-                B(Star), R(10),
-                B(LdaSmi), I8(1),
-                B(Star), R(9),
-                B(Jump), U8(62),
-                B(Jump), U8(48),
-                B(Star), R(13),
-                B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(12), U8(13),
-                B(Star), R(12),
+                B(CreateCatchContext), R(25), U8(10), U8(11),
+                B(Star), R(24),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(13),
+                B(Ldar), R(24),
+                B(PushContext), R(14),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(13), U8(20),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(6), U8(20),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(8), U8(0),
+                B(Star), R(6),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kReThrow), R(13), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kReThrow), R(25), U8(1),
+                B(PopContext), R(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(9),
+                B(Star), R(21),
                 B(Jump), U8(8),
-                B(Star), R(10),
+                B(Star), R(22),
                 B(LdaSmi), I8(2),
-                B(Star), R(9),
+                B(Star), R(21),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
+                B(Star), R(23),
                 B(LdaZero),
-                B(TestEqualStrict), R(12), U8(21),
-                B(JumpIfTrueConstant), U8(18),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(14), U8(22),
-                B(StaContextSlot), R(1), U8(12), U8(0),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(TestEqualStrict), R(6), U8(21),
+                B(JumpIfTrueConstant), U8(15),
+                B(LdaNamedProperty), R(4), U8(12), U8(22),
+                B(Star), R(10),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(JumpConstant), U8(17),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(254),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(12), U8(25),
-                B(JumpIfFalse), U8(169),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(TestEqualStrict), R(6), U8(25),
+                B(JumpIfFalse), U8(142),
+                B(Ldar), R(10),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(12),
-                B(LdaConstant), U8(15),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(12), U8(2),
+                B(Star), R(24),
+                B(LdaConstant), U8(13),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(24), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(12),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(14),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(14), U8(2),
-                B(StaContextSlot), R(1), U8(13), U8(0),
+                B(Mov), R(context), R(24),
+                B(Mov), R(10), R(26),
+                B(Mov), R(4), R(27),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(26), U8(2),
+                B(Star), R(11),
                 B(LdaUndefined),
-                B(Star), R(14),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
-                B(Star), R(16),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(17),
-                B(CallJSRuntime), U8(%async_function_await_caught), R(14), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(14),
+                B(Star), R(26),
+                B(Mov), R(2), R(27),
+                B(Mov), R(11), R(28),
+                B(Mov), R(8), R(29),
+                B(CallJSRuntime), U8(%async_function_await_caught), R(26), U8(4),
                 B(LdaSmi), I8(1),
-                B(SuspendGenerator), R(13), U8(2),
-                B(Ldar), R(14),
+                B(Mov), R(2), R(25),
+                B(Mov), R(8), R(26),
+                B(SuspendGenerator), R(25), U8(2),
+                B(Ldar), R(26),
   /*   68 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
                 B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(25), U8(1),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(25), U8(1),
+                B(Star), R(27),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(27),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(27),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(17),
-                B(Mov), R(14), R(16),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(29),
+                B(Mov), R(26), R(28),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(28), U8(2),
+                B(Star), R(18),
                 B(LdaZero),
-                B(Star), R(5),
-                B(JumpConstant), U8(23),
-                B(Ldar), R(14),
+                B(Star), R(17),
+                B(Jump), U8(243),
+                B(Ldar), R(26),
                 B(ReThrow),
-                B(Ldar), R(14),
+                B(Ldar), R(26),
                 B(Jump), U8(20),
-                B(Star), R(13),
+                B(Star), R(25),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(12), U8(16),
-                B(Star), R(12),
+                B(CreateCatchContext), R(25), U8(10), U8(14),
+                B(Star), R(24),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(147),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(Ldar), R(24),
+                B(PushContext), R(14),
+                B(PopContext), R(14),
+                B(Jump), U8(107),
+                B(Mov), R(10), R(25),
+                B(Mov), R(4), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(25), U8(2),
                 B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(13), U8(2),
-                B(StaContextSlot), R(1), U8(15), U8(0),
                 B(LdaUndefined),
-                B(Star), R(13),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(14),
-                B(LdaContextSlot), R(1), U8(15), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(16),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(13), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(13),
+                B(Star), R(25),
+                B(Mov), R(2), R(26),
+                B(Mov), R(13), R(27),
+                B(Mov), R(8), R(28),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(25), U8(4),
                 B(LdaSmi), I8(2),
-                B(SuspendGenerator), R(12), U8(2),
-                B(Ldar), R(13),
+                B(Mov), R(2), R(24),
+                B(Mov), R(8), R(25),
+                B(SuspendGenerator), R(24), U8(2),
+                B(Ldar), R(25),
   /*   68 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(12), U8(1),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(12), U8(1),
-                B(Star), R(14),
+                B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(24), U8(1),
+                B(Star), R(25),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(24), U8(1),
+                B(Star), R(26),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(16),
-                B(Mov), R(13), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(28),
+                B(Mov), R(25), R(27),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(27), U8(2),
+                B(Star), R(18),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(159),
-                B(Ldar), R(13),
+                B(Star), R(17),
+                B(Jump), U8(130),
+                B(Ldar), R(25),
                 B(ReThrow),
-                B(Ldar), R(13),
-                B(StaContextSlot), R(1), U8(14), U8(0),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
+                B(Mov), R(25), R(12),
                 B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(Ldar), R(11),
+                B(Ldar), R(23),
                 B(SetPendingMessage),
-                B(Ldar), R(9),
-                B(SwitchOnSmiNoFeedback), U8(19), U8(3), I8(0),
-                B(Jump), U8(26),
-                B(PopContext), R(1),
+                B(Ldar), R(21),
+                B(SwitchOnSmiNoFeedback), U8(16), U8(3), I8(0),
+                B(Jump), U8(22),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Mov), R(10), R(6),
-                B(Jump), U8(104),
-                B(PopContext), R(1),
+                B(Star), R(17),
+                B(Mov), R(22), R(18),
+                B(Jump), U8(92),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
-                B(Mov), R(10), R(6),
-                B(Jump), U8(93),
-                B(Ldar), R(10),
+                B(Star), R(17),
+                B(Mov), R(22), R(18),
+                B(Jump), U8(83),
+                B(Ldar), R(22),
                 B(ReThrow),
-                B(PopContext), R(1),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(10),
+                B(Star), R(21),
                 B(LdaUndefined),
-                B(Star), R(11),
-                B(CallJSRuntime), U8(%promise_resolve), R(9), U8(3),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(6),
+                B(Star), R(23),
+                B(Mov), R(8), R(22),
+                B(CallJSRuntime), U8(%promise_resolve), R(21), U8(3),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(65),
-                B(Jump), U8(51),
-                B(Star), R(9),
+                B(Star), R(17),
+                B(Mov), R(8), R(18),
+                B(Jump), U8(59),
+                B(Jump), U8(45),
+                B(Star), R(21),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(9), U8(12), U8(22),
-                B(Star), R(8),
+                B(CreateCatchContext), R(21), U8(10), U8(19),
+                B(Star), R(20),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(PushContext), R(1),
+                B(Ldar), R(20),
+                B(PushContext), R(14),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(10),
+                B(Star), R(21),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(11),
+                B(Star), R(23),
                 B(LdaFalse),
-                B(Star), R(12),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(9), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(24),
+                B(Mov), R(8), R(22),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(21), U8(4),
+                B(PopContext), R(14),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(17),
+                B(Mov), R(8), R(18),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(17),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(18),
                 B(LdaSmi), I8(2),
-                B(Star), R(5),
+                B(Star), R(17),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
+                B(Star), R(19),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(9),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(8), U8(2),
-                B(Ldar), R(7),
+                B(Star), R(20),
+                B(Mov), R(8), R(21),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(20), U8(2),
+                B(Ldar), R(19),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(24), U8(3), I8(0),
-                B(Jump), U8(25),
-                B(Ldar), R(6),
+                B(Ldar), R(17),
+                B(SwitchOnSmiNoFeedback), U8(20), U8(3), I8(0),
+                B(Jump), U8(24),
+                B(Ldar), R(18),
   /*   68 S> */ B(Return),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(9),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(Mov), R(6), R(10),
-                B(CallJSRuntime), U8(%promise_resolve), R(8), U8(3),
-                B(Ldar), R(9),
+                B(Star), R(20),
+                B(Mov), R(8), R(21),
+                B(Mov), R(18), R(22),
+                B(CallJSRuntime), U8(%promise_resolve), R(20), U8(3),
+                B(Ldar), R(8),
   /*   68 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(18),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   68 S> */ B(Return),
 ]
 constant pool: [
-  Smi [116],
-  Smi [546],
-  Smi [684],
-  FIXED_ARRAY_TYPE,
+  Smi [99],
+  Smi [404],
+  Smi [517],
   TUPLE2_TYPE,
   SYMBOL_TYPE,
   SYMBOL_TYPE,
-  Smi [83],
+  Smi [60],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
-  Smi [327],
-  Smi [350],
+  Smi [265],
   Smi [6],
-  Smi [16],
-  Smi [27],
+  Smi [14],
+  Smi [23],
   FIXED_ARRAY_TYPE,
-  Smi [297],
   Smi [6],
   Smi [9],
-  Smi [26],
+  Smi [25],
 ]
 handlers: [
-  [60, 889, 895],
-  [63, 838, 840],
-  [80, 402, 408],
-  [83, 354, 356],
-  [495, 611, 613],
+  [56, 691, 697],
+  [59, 646, 648],
+  [65, 309, 315],
+  [68, 269, 271],
+  [376, 467, 469],
 ]
 
 ---
@@ -888,438 +745,362 @@ snippet: "
   }
   f();
 "
-frame size: 18
+frame size: 30
 parameter count: 1
-bytecode array length: 952
+bytecode array length: 742
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(16),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(15),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(3), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(17),
+                B(CallRuntime), U16(Runtime::kAbort), R(17), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(12),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(15),
+                B(Mov), R(closure), R(17),
+                B(Mov), R(this), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(17), U8(2),
+                B(Star), R(2),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(5),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(5), U8(1),
-                B(StaCurrentContextSlot), U8(10),
-                B(Mov), R(context), R(7),
-                B(Mov), R(context), R(8),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(3),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(17),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(17), U8(1),
+                B(Star), R(8),
+                B(Mov), R(context), R(19),
+                B(Mov), R(context), R(20),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Mov), R(context), R(11),
-                B(Mov), R(context), R(12),
-  /*   43 S> */ B(CreateArrayLiteral), U8(4), U8(3), U8(17),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(5), U8(8),
+                B(Star), R(6),
+                B(Mov), R(context), R(23),
+                B(Mov), R(context), R(24),
+  /*   43 S> */ B(CreateArrayLiteral), U8(3), U8(3), U8(17),
+                B(Star), R(25),
+                B(LdaNamedProperty), R(25), U8(4), U8(8),
                 B(JumpIfUndefined), U8(17),
                 B(JumpIfNull), U8(15),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(10),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(25), U8(10),
                 B(JumpIfJSReceiver), U8(23),
                 B(CallRuntime), U16(Runtime::kThrowSymbolAsyncIteratorInvalid), R(0), U8(0),
-                B(LdaNamedProperty), R(13), U8(6), U8(4),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(6),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateAsyncFromSyncIterator), R(14), U8(1),
-  /*   43 E> */ B(StaContextSlot), R(1), U8(6), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(7), U8(1), I8(0),
+                B(LdaNamedProperty), R(25), U8(5), U8(4),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(25), U8(6),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateAsyncFromSyncIterator), R(26), U8(1),
+                B(Star), R(4),
+                B(Ldar), R(15),
+                B(SwitchOnSmiNoFeedback), U8(6), U8(1), I8(0),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   43 E> */ B(TestEqualStrictNoFeedback), R(15),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kAbort), R(13), U8(1),
-  /*   40 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(15),
-                B(LdaNamedProperty), R(15), U8(8), U8(14),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(15), U8(12),
-                B(StaContextSlot), R(1), U8(9), U8(0),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kAbort), R(25), U8(1),
+  /*   40 S> */ B(LdaNamedProperty), R(4), U8(7), U8(14),
+                B(Star), R(26),
+                B(CallProperty0), R(26), R(4), U8(12),
+                B(Star), R(7),
   /*   40 S> */ B(LdaUndefined),
-                B(Star), R(14),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(16),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(17),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(14), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(14),
+                B(Star), R(26),
+                B(Mov), R(2), R(27),
+                B(Mov), R(7), R(28),
+                B(Mov), R(8), R(29),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(26), U8(4),
                 B(LdaZero),
-                B(SuspendGenerator), R(13), U8(2),
-                B(Ldar), R(14),
+                B(Mov), R(2), R(25),
+                B(Mov), R(8), R(26),
+                B(SuspendGenerator), R(25), U8(2),
+                B(Ldar), R(26),
   /*  114 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
                 B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(25), U8(1),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(25), U8(1),
+                B(Star), R(27),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(15),
+                B(TestEqualStrictNoFeedback), R(27),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(15),
+                B(TestEqualStrictNoFeedback), R(27),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(17),
-                B(Mov), R(14), R(16),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
-                B(Star), R(10),
+                B(Star), R(29),
+                B(Mov), R(26), R(28),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(28), U8(2),
+                B(Star), R(22),
                 B(LdaZero),
-                B(Star), R(9),
-                B(Jump), U8(185),
-                B(Ldar), R(14),
+                B(Star), R(21),
+                B(Jump), U8(119),
+                B(Ldar), R(26),
                 B(ReThrow),
-                B(Ldar), R(14),
-  /*   40 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(14), U8(1),
+                B(Mov), R(26), R(5),
+  /*   40 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(5), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(13), U8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(9), U8(16),
-                B(JumpIfToBooleanTrue), U8(86),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(10), U8(18),
-                B(StaContextSlot), R(1), U8(11), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(5), U8(1),
+                B(LdaNamedProperty), R(5), U8(8), U8(16),
+                B(JumpIfToBooleanTrue), U8(43),
+                B(LdaNamedProperty), R(5), U8(9), U8(18),
+                B(Star), R(9),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(StaContextSlot), R(1), U8(5), U8(0),
+                B(Star), R(6),
+                B(Mov), R(9), R(3),
   /*   23 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(11),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-  /*   63 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(LdaSmi), I8(10),
-  /*   69 E> */ B(TestEqual), R(13), U8(20),
-                B(JumpIfFalse), U8(6),
-  /*   76 S> */ B(PopContext), R(2),
-                B(Jump), U8(24),
-  /*   90 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(LdaSmi), I8(20),
-  /*   96 E> */ B(TestEqual), R(13), U8(21),
-                B(JumpIfFalse), U8(6),
-  /*  103 S> */ B(PopContext), R(2),
-                B(Jump), U8(12),
-                B(PopContext), R(2),
+                B(Mov), R(3), R(0),
+  /*   63 S> */ B(LdaSmi), I8(10),
+  /*   69 E> */ B(TestEqual), R(0), U8(20),
+                B(JumpIfFalse), U8(4),
+  /*   76 S> */ B(Jump), U8(14),
+  /*   90 S> */ B(LdaSmi), I8(20),
+  /*   96 E> */ B(TestEqual), R(0), U8(21),
+                B(JumpIfFalse), U8(4),
+  /*  103 S> */ B(Jump), U8(8),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(JumpLoop), U8(249), I8(0),
-                B(Jump), U8(48),
-                B(Star), R(13),
+                B(Star), R(6),
+                B(JumpLoop), U8(168), I8(0),
+                B(Jump), U8(40),
+                B(Star), R(25),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(12), U8(13),
-                B(Star), R(12),
+                B(CreateCatchContext), R(25), U8(10), U8(11),
+                B(Star), R(24),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(13),
+                B(Ldar), R(24),
+                B(PushContext), R(14),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(13), U8(22),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(6), U8(22),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(8), U8(0),
+                B(Star), R(6),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kReThrow), R(13), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kReThrow), R(25), U8(1),
+                B(PopContext), R(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(9),
+                B(Star), R(21),
                 B(Jump), U8(8),
-                B(Star), R(10),
+                B(Star), R(22),
                 B(LdaSmi), I8(1),
-                B(Star), R(9),
+                B(Star), R(21),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
+                B(Star), R(23),
                 B(LdaZero),
-                B(TestEqualStrict), R(12), U8(23),
-                B(JumpIfTrueConstant), U8(18),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(14), U8(24),
-                B(StaContextSlot), R(1), U8(12), U8(0),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(TestEqualStrict), R(6), U8(23),
+                B(JumpIfTrueConstant), U8(15),
+                B(LdaNamedProperty), R(4), U8(12), U8(24),
+                B(Star), R(10),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(JumpConstant), U8(17),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(254),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(12), U8(27),
-                B(JumpIfFalse), U8(169),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(TestEqualStrict), R(6), U8(27),
+                B(JumpIfFalse), U8(142),
+                B(Ldar), R(10),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(12),
-                B(LdaConstant), U8(15),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(12), U8(2),
+                B(Star), R(24),
+                B(LdaConstant), U8(13),
+                B(Star), R(25),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(24), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(12),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(14),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(14), U8(2),
-                B(StaContextSlot), R(1), U8(13), U8(0),
+                B(Mov), R(context), R(24),
+                B(Mov), R(10), R(26),
+                B(Mov), R(4), R(27),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(26), U8(2),
+                B(Star), R(11),
                 B(LdaUndefined),
-                B(Star), R(14),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
-                B(Star), R(16),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(17),
-                B(CallJSRuntime), U8(%async_function_await_caught), R(14), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(14),
+                B(Star), R(26),
+                B(Mov), R(2), R(27),
+                B(Mov), R(11), R(28),
+                B(Mov), R(8), R(29),
+                B(CallJSRuntime), U8(%async_function_await_caught), R(26), U8(4),
                 B(LdaSmi), I8(1),
-                B(SuspendGenerator), R(13), U8(2),
-                B(Ldar), R(14),
+                B(Mov), R(2), R(25),
+                B(Mov), R(8), R(26),
+                B(SuspendGenerator), R(25), U8(2),
+                B(Ldar), R(26),
   /*  114 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
                 B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(25), U8(1),
+                B(Star), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(25), U8(1),
+                B(Star), R(27),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(27),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(27),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(17),
-                B(Mov), R(14), R(16),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(29),
+                B(Mov), R(26), R(28),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(28), U8(2),
+                B(Star), R(18),
                 B(LdaZero),
-                B(Star), R(5),
-                B(JumpConstant), U8(22),
-                B(Ldar), R(14),
+                B(Star), R(17),
+                B(Jump), U8(234),
+                B(Ldar), R(26),
                 B(ReThrow),
-                B(Ldar), R(14),
+                B(Ldar), R(26),
                 B(Jump), U8(20),
-                B(Star), R(13),
+                B(Star), R(25),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(12), U8(16),
-                B(Star), R(12),
+                B(CreateCatchContext), R(25), U8(10), U8(14),
+                B(Star), R(24),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(147),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
+                B(Ldar), R(24),
+                B(PushContext), R(14),
+                B(PopContext), R(14),
+                B(Jump), U8(107),
+                B(Mov), R(10), R(25),
+                B(Mov), R(4), R(26),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(25), U8(2),
                 B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(13), U8(2),
-                B(StaContextSlot), R(1), U8(15), U8(0),
                 B(LdaUndefined),
-                B(Star), R(13),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(14),
-                B(LdaContextSlot), R(1), U8(15), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(16),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(13), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(13),
+                B(Star), R(25),
+                B(Mov), R(2), R(26),
+                B(Mov), R(13), R(27),
+                B(Mov), R(8), R(28),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(25), U8(4),
                 B(LdaSmi), I8(2),
-                B(SuspendGenerator), R(12), U8(2),
-                B(Ldar), R(13),
+                B(Mov), R(2), R(24),
+                B(Mov), R(8), R(25),
+                B(SuspendGenerator), R(24), U8(2),
+                B(Ldar), R(25),
   /*  114 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(12), U8(1),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(12), U8(1),
-                B(Star), R(14),
+                B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(24), U8(1),
+                B(Star), R(25),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(24), U8(1),
+                B(Star), R(26),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(16),
-                B(Mov), R(13), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(28),
+                B(Mov), R(25), R(27),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(27), U8(2),
+                B(Star), R(18),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(148),
-                B(Ldar), R(13),
+                B(Star), R(17),
+                B(Jump), U8(121),
+                B(Ldar), R(25),
                 B(ReThrow),
-                B(Ldar), R(13),
-                B(StaContextSlot), R(1), U8(14), U8(0),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
+                B(Mov), R(25), R(12),
                 B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(Ldar), R(11),
+                B(Ldar), R(23),
                 B(SetPendingMessage),
-                B(Ldar), R(9),
-                B(SwitchOnSmiNoFeedback), U8(19), U8(2), I8(0),
-                B(Jump), U8(15),
-                B(PopContext), R(1),
+                B(Ldar), R(21),
+                B(SwitchOnSmiNoFeedback), U8(16), U8(2), I8(0),
+                B(Jump), U8(13),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Mov), R(10), R(6),
-                B(Jump), U8(93),
-                B(Ldar), R(10),
+                B(Star), R(17),
+                B(Mov), R(22), R(18),
+                B(Jump), U8(83),
+                B(Ldar), R(22),
                 B(ReThrow),
-                B(PopContext), R(1),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(10),
+                B(Star), R(21),
                 B(LdaUndefined),
-                B(Star), R(11),
-                B(CallJSRuntime), U8(%promise_resolve), R(9), U8(3),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(6),
+                B(Star), R(23),
+                B(Mov), R(8), R(22),
+                B(CallJSRuntime), U8(%promise_resolve), R(21), U8(3),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(65),
-                B(Jump), U8(51),
-                B(Star), R(9),
+                B(Star), R(17),
+                B(Mov), R(8), R(18),
+                B(Jump), U8(59),
+                B(Jump), U8(45),
+                B(Star), R(21),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(9), U8(12), U8(21),
-                B(Star), R(8),
+                B(CreateCatchContext), R(21), U8(10), U8(18),
+                B(Star), R(20),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(PushContext), R(1),
+                B(Ldar), R(20),
+                B(PushContext), R(14),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(10),
+                B(Star), R(21),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(11),
+                B(Star), R(23),
                 B(LdaFalse),
-                B(Star), R(12),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(9), U8(4),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(24),
+                B(Mov), R(8), R(22),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(21), U8(4),
+                B(PopContext), R(14),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(17),
+                B(Mov), R(8), R(18),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(17),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(18),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
+                B(Star), R(17),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
+                B(Star), R(19),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(9),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(8), U8(2),
-                B(Ldar), R(7),
+                B(Star), R(20),
+                B(Mov), R(8), R(21),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(20), U8(2),
+                B(Ldar), R(19),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(23), U8(2), I8(0),
+                B(Ldar), R(17),
+                B(SwitchOnSmiNoFeedback), U8(19), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(6),
+                B(Ldar), R(18),
   /*  114 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(18),
                 B(ReThrow),
                 B(LdaUndefined),
   /*  114 S> */ B(Return),
 ]
 constant pool: [
-  Smi [116],
-  Smi [574],
-  Smi [712],
-  FIXED_ARRAY_TYPE,
+  Smi [99],
+  Smi [419],
+  Smi [532],
   TUPLE2_TYPE,
   SYMBOL_TYPE,
   SYMBOL_TYPE,
-  Smi [83],
+  Smi [60],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
-  Smi [327],
-  Smi [350],
+  Smi [265],
   Smi [6],
-  Smi [16],
+  Smi [14],
   FIXED_ARRAY_TYPE,
-  Smi [286],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [60, 906, 912],
-  [63, 855, 857],
-  [80, 430, 436],
-  [83, 382, 384],
-  [523, 639, 641],
+  [56, 697, 703],
+  [59, 652, 654],
+  [65, 324, 330],
+  [68, 284, 286],
+  [391, 482, 484],
 ]
 
 ---
@@ -1330,234 +1111,196 @@ snippet: "
   }
   f();
 "
-frame size: 12
+frame size: 20
 parameter count: 1
-bytecode array length: 506
+bytecode array length: 432
 bytecodes: [
-                B(CreateFunctionContext), U8(9),
-                B(PushContext), R(0),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(2),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(2), U8(1),
-                B(StaCurrentContextSlot), U8(12),
-                B(Mov), R(context), R(4),
-                B(Mov), R(context), R(5),
-  /*   31 S> */ B(CreateObjectLiteral), U8(0), U8(3), U8(1), R(6),
-                B(Ldar), R(6),
-  /*   31 E> */ B(StaCurrentContextSlot), U8(5),
+                B(Star), R(10),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(10), U8(1),
+                B(Star), R(8),
+                B(Mov), R(context), R(12),
+                B(Mov), R(context), R(13),
+  /*   31 S> */ B(CreateObjectLiteral), U8(0), U8(3), U8(1), R(14),
+                B(Mov), R(14), R(1),
                 B(LdaZero),
-                B(StaCurrentContextSlot), U8(8),
-                B(Mov), R(context), R(8),
-                B(Mov), R(context), R(9),
+                B(Star), R(4),
+                B(Mov), R(context), R(16),
+                B(Mov), R(context), R(17),
   /*   68 S> */ B(CreateArrayLiteral), U8(1), U8(4), U8(17),
-                B(Star), R(10),
-                B(LdaNamedProperty), R(10), U8(2), U8(5),
-                B(Star), R(11),
-                B(CallProperty0), R(11), R(10), U8(7),
+                B(Star), R(18),
+                B(LdaNamedProperty), R(18), U8(2), U8(5),
+                B(Star), R(19),
+                B(CallProperty0), R(19), R(18), U8(7),
                 B(JumpIfJSReceiver), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
-  /*   68 E> */ B(StaCurrentContextSlot), U8(6),
-  /*   59 S> */ B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(11),
-                B(LdaNamedProperty), R(11), U8(3), U8(11),
-                B(Star), R(10),
-                B(CallProperty0), R(10), R(11), U8(9),
-  /*   59 E> */ B(StaCurrentContextSlot), U8(7),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(10), U8(1),
+                B(Star), R(2),
+  /*   59 S> */ B(LdaNamedProperty), R(2), U8(3), U8(11),
+                B(Star), R(18),
+                B(CallProperty0), R(18), R(2), U8(9),
+                B(Star), R(3),
+  /*   59 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(3), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(11),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(10),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(10),
-                B(LdaNamedProperty), R(10), U8(4), U8(13),
-                B(JumpIfToBooleanTrue), U8(42),
-                B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(10),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(11),
-  /*   58 E> */ B(LdaNamedProperty), R(11), U8(5), U8(15),
-                B(StaCurrentContextSlot), U8(9),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(3), U8(1),
+                B(LdaNamedProperty), R(3), U8(4), U8(13),
+                B(JumpIfToBooleanTrue), U8(31),
+  /*   58 E> */ B(LdaNamedProperty), R(3), U8(5), U8(15),
+                B(Star), R(5),
                 B(LdaSmi), I8(2),
-                B(StaCurrentContextSlot), U8(8),
-                B(LdaCurrentContextSlot), U8(9),
-                B(StaNamedPropertySloppy), R(10), U8(6), U8(17),
+                B(Star), R(4),
+                B(Ldar), R(5),
+                B(StaNamedPropertySloppy), R(1), U8(6), U8(17),
   /*   53 E> */ B(StackCheck),
-  /*   79 S> */ B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(10),
-  /*   87 E> */ B(LdaNamedProperty), R(10), U8(6), U8(19),
-                B(Star), R(7),
+  /*   79 S> */ B(Nop),
+  /*   87 E> */ B(LdaNamedProperty), R(1), U8(6), U8(19),
+                B(Star), R(15),
                 B(LdaZero),
-                B(Star), R(6),
-                B(Jump), U8(62),
-                B(Jump), U8(48),
-                B(Star), R(10),
+                B(Star), R(14),
+                B(Jump), U8(54),
+                B(Jump), U8(40),
+                B(Star), R(18),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(10), U8(7), U8(8),
-                B(Star), R(9),
+                B(CreateCatchContext), R(18), U8(7), U8(8),
+                B(Star), R(17),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(9),
-                B(PushContext), R(1),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(10),
+                B(Ldar), R(17),
+                B(PushContext), R(9),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(10), U8(21),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(4), U8(21),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(8), U8(0),
+                B(Star), R(4),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(10),
-                B(CallRuntime), U16(Runtime::kReThrow), R(10), U8(1),
-                B(PopContext), R(1),
+                B(Star), R(18),
+                B(CallRuntime), U16(Runtime::kReThrow), R(18), U8(1),
+                B(PopContext), R(9),
                 B(LdaSmi), I8(-1),
-                B(Star), R(6),
+                B(Star), R(14),
                 B(Jump), U8(8),
-                B(Star), R(7),
+                B(Star), R(15),
                 B(LdaSmi), I8(1),
-                B(Star), R(6),
+                B(Star), R(14),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(9),
+                B(Star), R(16),
                 B(LdaZero),
-                B(TestEqualStrict), R(9), U8(22),
-                B(JumpIfTrue), U8(126),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(9),
-                B(LdaNamedProperty), R(9), U8(9), U8(23),
-                B(StaCurrentContextSlot), U8(10),
-                B(LdaCurrentContextSlot), U8(10),
+                B(TestEqualStrict), R(4), U8(22),
+                B(JumpIfTrue), U8(104),
+                B(LdaNamedProperty), R(2), U8(9), U8(23),
+                B(Star), R(6),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(109),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(9),
+                B(Jump), U8(93),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(9), U8(26),
-                B(JumpIfFalse), U8(63),
-                B(LdaCurrentContextSlot), U8(10),
+                B(TestEqualStrict), R(4), U8(26),
+                B(JumpIfFalse), U8(61),
+                B(Ldar), R(6),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(9),
+                B(Star), R(17),
                 B(LdaConstant), U8(10),
-                B(Star), R(10),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(9), U8(2),
+                B(Star), R(18),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(17), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(9),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(10),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(10), U8(2),
+                B(Mov), R(context), R(17),
+                B(Mov), R(6), R(18),
+                B(Mov), R(2), R(19),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(18), U8(2),
                 B(Jump), U8(20),
-                B(Star), R(10),
+                B(Star), R(18),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(10), U8(7), U8(11),
-                B(Star), R(9),
+                B(CreateCatchContext), R(18), U8(7), U8(11),
+                B(Star), R(17),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(9),
-                B(PushContext), R(1),
-                B(PopContext), R(1),
-                B(Jump), U8(37),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(9), U8(2),
-                B(StaCurrentContextSlot), U8(11),
-                B(LdaCurrentContextSlot), U8(11),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(9), U8(1),
+                B(Ldar), R(17),
+                B(PushContext), R(9),
+                B(PopContext), R(9),
+                B(Jump), U8(27),
+                B(Mov), R(6), R(17),
+                B(Mov), R(2), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(17), U8(2),
+                B(Star), R(7),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(7), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(11),
-                B(LdaCurrentContextSlot), U8(11),
-                B(Star), R(9),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(9), U8(1),
-                B(Ldar), R(8),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(7), U8(1),
+                B(Ldar), R(16),
                 B(SetPendingMessage),
-                B(Ldar), R(6),
+                B(Ldar), R(14),
                 B(SwitchOnSmiNoFeedback), U8(12), U8(2), I8(0),
                 B(Jump), U8(13),
                 B(LdaZero),
-                B(Star), R(2),
-                B(Mov), R(7), R(3),
-                B(Jump), U8(93),
-                B(Ldar), R(7),
+                B(Star), R(10),
+                B(Mov), R(15), R(11),
+                B(Jump), U8(85),
+                B(Ldar), R(15),
                 B(ReThrow),
                 B(LdaUndefined),
-                B(Star), R(6),
-                B(LdaCurrentContextSlot), U8(12),
-                B(Star), R(7),
+                B(Star), R(14),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(CallJSRuntime), U8(%promise_resolve), R(6), U8(3),
-                B(LdaCurrentContextSlot), U8(12),
-                B(Star), R(3),
+                B(Star), R(16),
+                B(Mov), R(8), R(15),
+                B(CallJSRuntime), U8(%promise_resolve), R(14), U8(3),
                 B(LdaSmi), I8(1),
-                B(Star), R(2),
-                B(Jump), U8(66),
-                B(Jump), U8(52),
-                B(Star), R(6),
+                B(Star), R(10),
+                B(Mov), R(8), R(11),
+                B(Jump), U8(60),
+                B(Jump), U8(46),
+                B(Star), R(14),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(6), U8(7), U8(14),
-                B(Star), R(5),
+                B(CreateCatchContext), R(14), U8(7), U8(14),
+                B(Star), R(13),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(PushContext), R(1),
+                B(Ldar), R(13),
+                B(PushContext), R(9),
                 B(LdaUndefined),
-                B(Star), R(6),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(7),
+                B(Star), R(14),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(8),
+                B(Star), R(16),
                 B(LdaFalse),
-                B(Star), R(9),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(6), U8(4),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(3),
+                B(Star), R(17),
+                B(Mov), R(8), R(15),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(14), U8(4),
+                B(PopContext), R(9),
                 B(LdaSmi), I8(1),
-                B(Star), R(2),
+                B(Star), R(10),
+                B(Mov), R(8), R(11),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(2),
+                B(Star), R(10),
                 B(Jump), U8(8),
-                B(Star), R(3),
+                B(Star), R(11),
                 B(LdaSmi), I8(2),
-                B(Star), R(2),
+                B(Star), R(10),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(4),
+                B(Star), R(12),
                 B(LdaUndefined),
-                B(Star), R(5),
-                B(LdaCurrentContextSlot), U8(12),
-                B(Star), R(6),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(5), U8(2),
-                B(Ldar), R(4),
+                B(Star), R(13),
+                B(Mov), R(8), R(14),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(13), U8(2),
+                B(Ldar), R(12),
                 B(SetPendingMessage),
-                B(Ldar), R(2),
+                B(Ldar), R(10),
                 B(SwitchOnSmiNoFeedback), U8(15), U8(3), I8(0),
-                B(Jump), U8(25),
-                B(LdaCurrentContextSlot), U8(12),
-                B(Star), R(6),
+                B(Jump), U8(24),
                 B(LdaUndefined),
-                B(Star), R(5),
-                B(Mov), R(3), R(7),
-                B(CallJSRuntime), U8(%promise_resolve), R(5), U8(3),
-                B(Ldar), R(6),
+                B(Star), R(13),
+                B(Mov), R(8), R(14),
+                B(Mov), R(11), R(15),
+                B(CallJSRuntime), U8(%promise_resolve), R(13), U8(3),
+                B(Ldar), R(8),
   /*   96 S> */ B(Return),
-                B(Ldar), R(3),
+                B(Ldar), R(11),
   /*   96 S> */ B(Return),
-                B(Ldar), R(3),
+                B(Ldar), R(11),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   96 S> */ B(Return),
@@ -1579,14 +1322,14 @@ constant pool: [
   Smi [14],
   FIXED_ARRAY_TYPE,
   Smi [6],
-  Smi [23],
-  Smi [26],
+  Smi [22],
+  Smi [25],
 ]
 handlers: [
-  [17, 443, 449],
-  [20, 391, 393],
-  [35, 195, 201],
-  [38, 147, 149],
-  [276, 288, 290],
+  [13, 371, 377],
+  [16, 325, 327],
+  [30, 157, 163],
+  [33, 117, 119],
+  [224, 234, 236],
 ]
 

test/cctest/interpreter/bytecode_expectations/ForOfLoop.golden

@@ -641,276 +641,221 @@ snippet: "
   }
   f([1, 2, 3]);
 "
-frame size: 15
+frame size: 24
 parameter count: 2
-bytecode array length: 587
+bytecode array length: 435
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(5),
+                B(PushContext), R(14),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(4),
+                B(Star), R(13),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(1), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(6),
-                B(CallRuntime), U16(Runtime::kAbort), R(6), U8(1),
+                B(Star), R(15),
+                B(CallRuntime), U16(Runtime::kAbort), R(15), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(4),
-                B(CreateFunctionContext), U8(9),
-                B(PushContext), R(0),
+                B(Star), R(13),
+                B(CreateFunctionContext), U8(1),
+                B(PushContext), R(11),
                 B(Ldar), R(arg0),
                 B(StaCurrentContextSlot), U8(4),
-                B(Mov), R(closure), R(6),
-                B(Mov), R(this), R(7),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(6), U8(2),
-                B(StaCurrentContextSlot), U8(5),
+                B(Mov), R(closure), R(15),
+                B(Mov), R(this), R(16),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(15), U8(2),
+                B(Star), R(3),
   /*   11 E> */ B(StackCheck),
-                B(Mov), R(context), R(8),
-                B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(9),
-                B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(10),
+                B(Mov), R(context), R(17),
                 B(LdaZero),
-  /*   11 E> */ B(SuspendGenerator), R(9), U8(0),
-                B(Ldar), R(10),
+                B(Mov), R(3), R(19),
+                B(Mov), R(3), R(18),
+  /*   11 E> */ B(SuspendGenerator), R(18), U8(0),
+                B(Ldar), R(19),
   /*   55 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(4),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(9), U8(1),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(9), U8(1),
-                B(Star), R(11),
+                B(Star), R(13),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(18), U8(1),
+                B(Star), R(19),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(18), U8(1),
+                B(Star), R(20),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(11),
+                B(TestEqualStrictNoFeedback), R(20),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(11),
+                B(TestEqualStrictNoFeedback), R(20),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(13),
-                B(Mov), R(10), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(12), U8(2),
-                B(Star), R(7),
+                B(Star), R(22),
+                B(Mov), R(19), R(21),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(21), U8(2),
+                B(Star), R(16),
                 B(LdaZero),
-                B(Star), R(6),
-                B(JumpConstant), U8(13),
-                B(Ldar), R(10),
+                B(Star), R(15),
+                B(JumpConstant), U8(10),
+                B(Ldar), R(19),
   /*   11 E> */ B(Throw),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(1),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(Mov), R(context), R(11),
-                B(Mov), R(context), R(12),
-  /*   35 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(2), U8(3),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(5),
+                B(Star), R(7),
+                B(Mov), R(context), R(20),
+                B(Mov), R(context), R(21),
+  /*   35 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
+                B(Star), R(22),
+                B(LdaNamedProperty), R(22), U8(1), U8(3),
+                B(Star), R(23),
+                B(CallProperty0), R(23), R(22), U8(5),
                 B(JumpIfJSReceiver), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
-  /*   35 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-  /*   30 S> */ B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(14),
-                B(LdaNamedProperty), R(14), U8(3), U8(9),
-                B(Star), R(13),
-                B(CallProperty0), R(13), R(14), U8(7),
-  /*   30 E> */ B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(13), U8(1),
+                B(Star), R(5),
+  /*   30 S> */ B(LdaNamedProperty), R(5), U8(2), U8(9),
+                B(Star), R(22),
+                B(CallProperty0), R(22), R(5), U8(7),
+                B(Star), R(6),
+  /*   30 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(6), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(13), U8(1),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(4), U8(11),
-                B(JumpIfToBooleanTrue), U8(73),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(5), U8(13),
-                B(StaContextSlot), R(1), U8(10), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(6), U8(1),
+                B(LdaNamedProperty), R(6), U8(3), U8(11),
+                B(JumpIfToBooleanTrue), U8(28),
+                B(LdaNamedProperty), R(6), U8(4), U8(13),
+                B(Star), R(8),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(StaContextSlot), R(1), U8(6), U8(0),
+                B(Star), R(7),
+                B(Mov), R(8), R(4),
   /*   21 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(6),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(7),
-                B(PushContext), R(3),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-  /*   50 S> */ B(LdaImmutableContextSlot), R(3), U8(4), U8(0),
-  /*   50 E> */ B(StaCurrentContextSlot), U8(4),
-                B(PopContext), R(3),
-                B(PopContext), R(2),
+                B(Mov), R(4), R(1),
+  /*   50 S> */ B(Mov), R(1), R(0),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(JumpLoop), U8(120), I8(0),
-                B(Jump), U8(44),
-                B(Star), R(13),
+                B(Star), R(7),
+                B(JumpLoop), U8(53), I8(0),
+                B(Jump), U8(36),
+                B(Star), R(22),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(8), U8(9),
-                B(PushContext), R(2),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(13),
+  /*   50 E> */ B(CreateCatchContext), R(22), U8(5), U8(6),
+                B(PushContext), R(12),
+                B(Star), R(21),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(13), U8(15),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(7), U8(15),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(9), U8(0),
+                B(Star), R(7),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kReThrow), R(13), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(22),
+                B(CallRuntime), U16(Runtime::kReThrow), R(22), U8(1),
+                B(PopContext), R(12),
                 B(LdaSmi), I8(-1),
-                B(Star), R(9),
+                B(Star), R(18),
                 B(Jump), U8(7),
-                B(Star), R(10),
+                B(Star), R(19),
                 B(LdaZero),
-                B(Star), R(9),
+                B(Star), R(18),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(12),
+                B(Star), R(20),
                 B(LdaZero),
-                B(TestEqualStrict), R(12), U8(16),
-                B(JumpIfTrue), U8(150),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(10), U8(17),
-                B(StaContextSlot), R(1), U8(11), U8(0),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
+                B(TestEqualStrict), R(7), U8(16),
+                B(JumpIfTrue), U8(104),
+                B(LdaNamedProperty), R(5), U8(7), U8(17),
+                B(Star), R(9),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(127),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(93),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(12), U8(20),
-                B(JumpIfFalse), U8(69),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
+                B(TestEqualStrict), R(7), U8(20),
+                B(JumpIfFalse), U8(61),
+                B(Ldar), R(9),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(12),
-                B(LdaConstant), U8(11),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(12), U8(2),
+                B(Star), R(21),
+                B(LdaConstant), U8(8),
+                B(Star), R(22),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(21), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(12),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(13), U8(2),
+                B(Mov), R(context), R(21),
+                B(Mov), R(9), R(22),
+                B(Mov), R(5), R(23),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(22), U8(2),
                 B(Jump), U8(20),
-                B(Star), R(13),
+                B(Star), R(22),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(8), U8(12),
-                B(Star), R(12),
+                B(CreateCatchContext), R(22), U8(5), U8(9),
+                B(Star), R(21),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(47),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(12), U8(2),
-                B(StaContextSlot), R(1), U8(12), U8(0),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
+                B(Ldar), R(21),
+                B(PushContext), R(12),
+                B(PopContext), R(12),
+                B(Jump), U8(27),
+                B(Mov), R(9), R(21),
+                B(Mov), R(5), R(22),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(21), U8(2),
+                B(Star), R(10),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(10), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(Ldar), R(11),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
+                B(Ldar), R(20),
                 B(SetPendingMessage),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(9),
-                B(JumpIfFalse), U8(13),
-                B(PopContext), R(1),
+                B(TestEqualStrictNoFeedback), R(18),
+                B(JumpIfFalse), U8(11),
                 B(LdaSmi), I8(1),
-                B(Star), R(6),
-                B(Mov), R(10), R(7),
-                B(Jump), U8(33),
-                B(PopContext), R(1),
+                B(Star), R(15),
+                B(Mov), R(19), R(16),
+                B(Jump), U8(31),
                 B(LdaUndefined),
-                B(Star), R(9),
+                B(Star), R(18),
                 B(LdaTrue),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(9), U8(2),
-                B(Star), R(7),
+                B(Star), R(19),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(18), U8(2),
+                B(Star), R(16),
                 B(LdaZero),
-                B(Star), R(6),
+                B(Star), R(15),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(6),
+                B(Star), R(15),
                 B(Jump), U8(8),
-                B(Star), R(7),
+                B(Star), R(16),
                 B(LdaSmi), I8(1),
-                B(Star), R(6),
+                B(Star), R(15),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(8),
-                B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(9), U8(1),
-                B(Ldar), R(8),
+                B(Star), R(17),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(3), U8(1),
+                B(Ldar), R(17),
                 B(SetPendingMessage),
-                B(Ldar), R(6),
-                B(SwitchOnSmiNoFeedback), U8(14), U8(2), I8(0),
+                B(Ldar), R(15),
+                B(SwitchOnSmiNoFeedback), U8(11), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(7),
+                B(Ldar), R(16),
   /*   55 S> */ B(Return),
-                B(Ldar), R(7),
+                B(Ldar), R(16),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   55 S> */ B(Return),
 ]
 constant pool: [
-  Smi [56],
-  FIXED_ARRAY_TYPE,
+  Smi [54],
   SYMBOL_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
-  Smi [444],
+  Smi [298],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [55, 544, 550],
-  [134, 331, 337],
-  [137, 287, 289],
-  [423, 439, 441],
+  [55, 396, 402],
+  [121, 239, 245],
+  [124, 203, 205],
+  [305, 315, 317],
 ]
 
 ---
@@ -920,319 +865,268 @@ snippet: "
   }
   f([1, 2, 3]);
 "
-frame size: 17
+frame size: 26
 parameter count: 2
-bytecode array length: 681
+bytecode array length: 535
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(13),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(12),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(2), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(14),
+                B(CallRuntime), U16(Runtime::kAbort), R(14), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(9),
-                B(PushContext), R(0),
+                B(Star), R(12),
+                B(CreateFunctionContext), U8(1),
+                B(PushContext), R(10),
                 B(Ldar), R(arg0),
                 B(StaCurrentContextSlot), U8(4),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(5),
+                B(Mov), R(closure), R(14),
+                B(Mov), R(this), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(14), U8(2),
+                B(Star), R(2),
   /*   11 E> */ B(StackCheck),
-                B(Mov), R(context), R(7),
-                B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(8),
-                B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(9),
+                B(Mov), R(context), R(16),
                 B(LdaZero),
-  /*   11 E> */ B(SuspendGenerator), R(8), U8(0),
-                B(Ldar), R(9),
+                B(Mov), R(2), R(18),
+                B(Mov), R(2), R(17),
+  /*   11 E> */ B(SuspendGenerator), R(17), U8(0),
+                B(Ldar), R(18),
   /*   49 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(8), U8(1),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(8), U8(1),
-                B(Star), R(10),
+                B(Star), R(12),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(17), U8(1),
+                B(Star), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(17), U8(1),
+                B(Star), R(19),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(10),
+                B(TestEqualStrictNoFeedback), R(19),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(10),
+                B(TestEqualStrictNoFeedback), R(19),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(12),
-                B(Mov), R(9), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(11), U8(2),
-                B(Star), R(6),
+                B(Star), R(21),
+                B(Mov), R(18), R(20),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(20), U8(2),
+                B(Star), R(15),
                 B(LdaZero),
-                B(Star), R(5),
-                B(JumpConstant), U8(16),
-                B(Ldar), R(9),
+                B(Star), R(14),
+                B(JumpConstant), U8(14),
+                B(Ldar), R(18),
   /*   11 E> */ B(Throw),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(2),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(Mov), R(context), R(10),
-                B(Mov), R(context), R(11),
-  /*   35 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(3), U8(3),
-                B(Star), R(13),
-                B(CallProperty0), R(13), R(12), U8(5),
+                B(Star), R(6),
+                B(Mov), R(context), R(19),
+                B(Mov), R(context), R(20),
+  /*   35 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
+                B(Star), R(21),
+                B(LdaNamedProperty), R(21), U8(2), U8(3),
+                B(Star), R(22),
+                B(CallProperty0), R(22), R(21), U8(5),
                 B(JumpIfJSReceiver), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
-  /*   35 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(4), U8(1), I8(1),
+                B(Star), R(4),
+                B(Ldar), R(12),
+                B(SwitchOnSmiNoFeedback), U8(3), U8(1), I8(1),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   35 E> */ B(TestEqualStrictNoFeedback), R(12),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kAbort), R(12), U8(1),
-  /*   30 S> */ B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(5), U8(9),
-                B(Star), R(12),
-                B(CallProperty0), R(12), R(13), U8(7),
-  /*   30 E> */ B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
+                B(Star), R(21),
+                B(CallRuntime), U16(Runtime::kAbort), R(21), U8(1),
+  /*   30 S> */ B(LdaNamedProperty), R(4), U8(4), U8(9),
+                B(Star), R(21),
+                B(CallProperty0), R(21), R(4), U8(7),
+                B(Star), R(5),
+  /*   30 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(5), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(6), U8(11),
-                B(JumpIfToBooleanTrue), U8(132),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(7), U8(13),
-                B(StaContextSlot), R(1), U8(10), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(5), U8(1),
+                B(LdaNamedProperty), R(5), U8(5), U8(11),
+                B(JumpIfToBooleanTrue), U8(95),
+                B(LdaNamedProperty), R(5), U8(6), U8(13),
+                B(Star), R(7),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(StaContextSlot), R(1), U8(6), U8(0),
+                B(Star), R(6),
+                B(Mov), R(7), R(3),
   /*   21 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(8),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-  /*   40 S> */ B(LdaImmutableContextSlot), R(1), U8(5), U8(0),
-                B(Star), R(12),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(LdaFalse),
-                B(Star), R(14),
-  /*   46 E> */ B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(13), U8(2),
-                B(Star), R(13),
+                B(Mov), R(3), R(0),
+  /*   40 S> */ B(LdaFalse),
+                B(Star), R(23),
+                B(Mov), R(3), R(22),
+  /*   46 E> */ B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(22), U8(2),
+                B(Star), R(22),
                 B(LdaSmi), I8(1),
-                B(SuspendGenerator), R(12), U8(0),
-                B(Ldar), R(13),
+                B(Mov), R(2), R(21),
+                B(SuspendGenerator), R(21), U8(0),
+                B(Ldar), R(22),
   /*   49 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(12), U8(1),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(12), U8(1),
-                B(Star), R(14),
+                B(Star), R(12),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(21), U8(1),
+                B(Star), R(22),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(21), U8(1),
+                B(Star), R(23),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(23),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(23),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(16),
-                B(Mov), R(13), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
-                B(PopContext), R(2),
-                B(Star), R(9),
+                B(Star), R(25),
+                B(Mov), R(22), R(24),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(24), U8(2),
+                B(Star), R(18),
                 B(LdaZero),
-                B(Star), R(8),
-                B(Jump), U8(71),
-                B(Ldar), R(13),
+                B(Star), R(17),
+                B(Jump), U8(59),
+                B(Ldar), R(22),
   /*   40 E> */ B(Throw),
-                B(PopContext), R(2),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(JumpLoop), U8(200), I8(0),
-                B(Jump), U8(44),
-                B(Star), R(12),
+                B(Star), R(6),
+                B(JumpLoop), U8(141), I8(0),
+                B(Jump), U8(36),
+                B(Star), R(21),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(12), U8(9), U8(10),
-                B(PushContext), R(2),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(12),
+                B(CreateCatchContext), R(21), U8(7), U8(8),
+                B(PushContext), R(11),
+                B(Star), R(20),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(12), U8(15),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(6), U8(15),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(9), U8(0),
+                B(Star), R(6),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kReThrow), R(12), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(21),
+                B(CallRuntime), U16(Runtime::kReThrow), R(21), U8(1),
+                B(PopContext), R(11),
                 B(LdaSmi), I8(-1),
-                B(Star), R(8),
+                B(Star), R(17),
                 B(Jump), U8(8),
-                B(Star), R(9),
+                B(Star), R(18),
                 B(LdaSmi), I8(1),
-                B(Star), R(8),
+                B(Star), R(17),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(10),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(11),
+                B(Star), R(19),
                 B(LdaZero),
-                B(TestEqualStrict), R(11), U8(16),
-                B(JumpIfTrue), U8(150),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(11),
-                B(LdaNamedProperty), R(11), U8(11), U8(17),
-                B(StaContextSlot), R(1), U8(11), U8(0),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
+                B(TestEqualStrict), R(6), U8(16),
+                B(JumpIfTrue), U8(104),
+                B(LdaNamedProperty), R(4), U8(9), U8(17),
+                B(Star), R(8),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(127),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(11),
+                B(Jump), U8(93),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(11), U8(20),
-                B(JumpIfFalse), U8(69),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
+                B(TestEqualStrict), R(6), U8(20),
+                B(JumpIfFalse), U8(61),
+                B(Ldar), R(8),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(11),
-                B(LdaConstant), U8(12),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(11), U8(2),
+                B(Star), R(20),
+                B(LdaConstant), U8(10),
+                B(Star), R(21),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(20), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(11),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(12), U8(2),
+                B(Mov), R(context), R(20),
+                B(Mov), R(8), R(21),
+                B(Mov), R(4), R(22),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(21), U8(2),
                 B(Jump), U8(20),
-                B(Star), R(12),
+                B(Star), R(21),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(12), U8(9), U8(13),
-                B(Star), R(11),
+                B(CreateCatchContext), R(21), U8(7), U8(11),
+                B(Star), R(20),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(11),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(47),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(11), U8(2),
-                B(StaContextSlot), R(1), U8(12), U8(0),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(11), U8(1),
+                B(Ldar), R(20),
+                B(PushContext), R(11),
+                B(PopContext), R(11),
+                B(Jump), U8(27),
+                B(Mov), R(8), R(20),
+                B(Mov), R(4), R(21),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(20), U8(2),
+                B(Star), R(9),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(9), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(11),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(11), U8(1),
-                B(Ldar), R(10),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(9), U8(1),
+                B(Ldar), R(19),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(SwitchOnSmiNoFeedback), U8(14), U8(2), I8(0),
-                B(Jump), U8(23),
-                B(PopContext), R(1),
+                B(Ldar), R(17),
+                B(SwitchOnSmiNoFeedback), U8(12), U8(2), I8(0),
+                B(Jump), U8(19),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Mov), R(9), R(6),
-                B(Jump), U8(44),
-                B(PopContext), R(1),
+                B(Star), R(14),
+                B(Mov), R(18), R(15),
+                B(Jump), U8(40),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
-                B(Mov), R(9), R(6),
-                B(Jump), U8(33),
-                B(PopContext), R(1),
+                B(Star), R(14),
+                B(Mov), R(18), R(15),
+                B(Jump), U8(31),
                 B(LdaUndefined),
-                B(Star), R(8),
+                B(Star), R(17),
                 B(LdaTrue),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(8), U8(2),
-                B(Star), R(6),
+                B(Star), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(17), U8(2),
+                B(Star), R(15),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(14),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(14),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(15),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
+                B(Star), R(14),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
-                B(LdaImmutableCurrentContextSlot), U8(5),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(8), U8(1),
-                B(Ldar), R(7),
+                B(Star), R(16),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(2), U8(1),
+                B(Ldar), R(16),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(17), U8(2), I8(0),
+                B(Ldar), R(14),
+                B(SwitchOnSmiNoFeedback), U8(15), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(6),
+                B(Ldar), R(15),
   /*   49 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(15),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   49 S> */ B(Return),
 ]
 constant pool: [
-  Smi [56],
-  Smi [150],
-  FIXED_ARRAY_TYPE,
+  Smi [54],
+  Smi [133],
   SYMBOL_TYPE,
-  Smi [142],
+  Smi [89],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
   Smi [6],
-  Smi [16],
-  Smi [538],
+  Smi [14],
+  Smi [398],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [55, 638, 644],
-  [134, 411, 417],
-  [137, 367, 369],
-  [504, 520, 522],
+  [55, 496, 502],
+  [121, 327, 333],
+  [124, 291, 293],
+  [394, 404, 406],
 ]
 
 ---
@@ -1242,249 +1136,194 @@ snippet: "
   }
   f([1, 2, 3]);
 "
-frame size: 14
+frame size: 24
 parameter count: 2
-bytecode array length: 550
+bytecode array length: 397
 bytecodes: [
-                B(CreateFunctionContext), U8(10),
-                B(PushContext), R(0),
+                B(CreateFunctionContext), U8(1),
+                B(PushContext), R(12),
                 B(Ldar), R(arg0),
                 B(StaCurrentContextSlot), U8(4),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(4),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(4), U8(1),
-                B(StaCurrentContextSlot), U8(13),
-                B(Mov), R(context), R(6),
-                B(Mov), R(context), R(7),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(0),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(14),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(14), U8(1),
+                B(Star), R(11),
+                B(Mov), R(context), R(16),
+                B(Mov), R(context), R(17),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(Mov), R(context), R(10),
-                B(Mov), R(context), R(11),
-  /*   40 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(1), U8(3),
-                B(Star), R(13),
-                B(CallProperty0), R(13), R(12), U8(5),
+                B(Star), R(7),
+                B(Mov), R(context), R(20),
+                B(Mov), R(context), R(21),
+  /*   40 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
+                B(Star), R(22),
+                B(LdaNamedProperty), R(22), U8(0), U8(3),
+                B(Star), R(23),
+                B(CallProperty0), R(23), R(22), U8(5),
                 B(JumpIfJSReceiver), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
-  /*   40 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-  /*   35 S> */ B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(2), U8(9),
-                B(Star), R(12),
-                B(CallProperty0), R(12), R(13), U8(7),
-  /*   35 E> */ B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
+                B(Star), R(5),
+  /*   35 S> */ B(LdaNamedProperty), R(5), U8(1), U8(9),
+                B(Star), R(22),
+                B(CallProperty0), R(22), R(5), U8(7),
+                B(Star), R(6),
+  /*   35 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(6), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(3), U8(11),
-                B(JumpIfToBooleanTrue), U8(73),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(4), U8(13),
-                B(StaContextSlot), R(1), U8(10), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(6), U8(1),
+                B(LdaNamedProperty), R(6), U8(2), U8(11),
+                B(JumpIfToBooleanTrue), U8(28),
+                B(LdaNamedProperty), R(6), U8(3), U8(13),
+                B(Star), R(8),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(StaContextSlot), R(1), U8(6), U8(0),
+                B(Star), R(7),
+                B(Mov), R(8), R(4),
   /*   26 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(5),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(6),
-                B(PushContext), R(3),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-  /*   55 S> */ B(LdaImmutableContextSlot), R(3), U8(4), U8(0),
-  /*   55 E> */ B(StaCurrentContextSlot), U8(4),
-                B(PopContext), R(3),
-                B(PopContext), R(2),
+                B(Mov), R(4), R(1),
+  /*   55 S> */ B(Mov), R(1), R(0),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(JumpLoop), U8(120), I8(0),
-                B(Jump), U8(48),
-                B(Star), R(12),
+                B(Star), R(7),
+                B(JumpLoop), U8(53), I8(0),
+                B(Jump), U8(40),
+                B(Star), R(22),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(12), U8(7), U8(8),
-                B(Star), R(11),
+  /*   55 E> */ B(CreateCatchContext), R(22), U8(4), U8(5),
+                B(Star), R(21),
                 B(LdaTheHole),
-                B(SetPendingMessage),
-                B(Ldar), R(11),
-                B(PushContext), R(2),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(12),
+                B(SetPendingMessage),
+                B(Ldar), R(21),
+                B(PushContext), R(13),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(12), U8(15),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(7), U8(15),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(9), U8(0),
+                B(Star), R(7),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kReThrow), R(12), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(22),
+                B(CallRuntime), U16(Runtime::kReThrow), R(22), U8(1),
+                B(PopContext), R(13),
                 B(LdaSmi), I8(-1),
-                B(Star), R(8),
+                B(Star), R(18),
                 B(Jump), U8(7),
-                B(Star), R(9),
+                B(Star), R(19),
                 B(LdaZero),
-                B(Star), R(8),
+                B(Star), R(18),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(10),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(11),
+                B(Star), R(20),
                 B(LdaZero),
-                B(TestEqualStrict), R(11), U8(16),
-                B(JumpIfTrue), U8(150),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(11),
-                B(LdaNamedProperty), R(11), U8(9), U8(17),
-                B(StaContextSlot), R(1), U8(11), U8(0),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
+                B(TestEqualStrict), R(7), U8(16),
+                B(JumpIfTrue), U8(104),
+                B(LdaNamedProperty), R(5), U8(6), U8(17),
+                B(Star), R(9),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(127),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(11),
+                B(Jump), U8(93),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(11), U8(20),
-                B(JumpIfFalse), U8(69),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
+                B(TestEqualStrict), R(7), U8(20),
+                B(JumpIfFalse), U8(61),
+                B(Ldar), R(9),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(11),
-                B(LdaConstant), U8(10),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(11), U8(2),
+                B(Star), R(21),
+                B(LdaConstant), U8(7),
+                B(Star), R(22),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(21), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(11),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(12), U8(2),
+                B(Mov), R(context), R(21),
+                B(Mov), R(9), R(22),
+                B(Mov), R(5), R(23),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(22), U8(2),
                 B(Jump), U8(20),
-                B(Star), R(12),
+                B(Star), R(22),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(12), U8(7), U8(11),
-                B(Star), R(11),
+                B(CreateCatchContext), R(22), U8(4), U8(8),
+                B(Star), R(21),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(11),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(47),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(11), U8(2),
-                B(StaContextSlot), R(1), U8(12), U8(0),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(11), U8(1),
+                B(Ldar), R(21),
+                B(PushContext), R(13),
+                B(PopContext), R(13),
+                B(Jump), U8(27),
+                B(Mov), R(9), R(21),
+                B(Mov), R(5), R(22),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(21), U8(2),
+                B(Star), R(10),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(10), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(Star), R(11),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(11), U8(1),
-                B(Ldar), R(10),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(10), U8(1),
+                B(Ldar), R(20),
                 B(SetPendingMessage),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(8),
+                B(TestEqualStrictNoFeedback), R(18),
                 B(JumpIfFalse), U8(5),
-                B(Ldar), R(9),
+                B(Ldar), R(19),
                 B(ReThrow),
-                B(PopContext), R(1),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(13),
-                B(Star), R(9),
+                B(Star), R(18),
                 B(LdaUndefined),
-                B(Star), R(10),
-                B(CallJSRuntime), U8(%promise_resolve), R(8), U8(3),
-                B(LdaCurrentContextSlot), U8(13),
-                B(Star), R(5),
+                B(Star), R(20),
+                B(Mov), R(11), R(19),
+                B(CallJSRuntime), U8(%promise_resolve), R(18), U8(3),
                 B(LdaZero),
-                B(Star), R(4),
-                B(Jump), U8(65),
-                B(Jump), U8(51),
-                B(Star), R(8),
+                B(Star), R(14),
+                B(Mov), R(11), R(15),
+                B(Jump), U8(59),
+                B(Jump), U8(45),
+                B(Star), R(18),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(8), U8(7), U8(12),
-                B(Star), R(7),
+                B(CreateCatchContext), R(18), U8(4), U8(9),
+                B(Star), R(17),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(7),
-                B(PushContext), R(1),
+                B(Ldar), R(17),
+                B(PushContext), R(13),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
-                B(Star), R(9),
+                B(Star), R(18),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(10),
+                B(Star), R(20),
                 B(LdaFalse),
-                B(Star), R(11),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(8), U8(4),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(5),
+                B(Star), R(21),
+                B(Mov), R(11), R(19),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(18), U8(4),
+                B(PopContext), R(13),
                 B(LdaZero),
-                B(Star), R(4),
+                B(Star), R(14),
+                B(Mov), R(11), R(15),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(4),
+                B(Star), R(14),
                 B(Jump), U8(8),
-                B(Star), R(5),
+                B(Star), R(15),
                 B(LdaSmi), I8(1),
-                B(Star), R(4),
+                B(Star), R(14),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(6),
+                B(Star), R(16),
                 B(LdaUndefined),
-                B(Star), R(7),
-                B(LdaCurrentContextSlot), U8(13),
-                B(Star), R(8),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(7), U8(2),
-                B(Ldar), R(6),
+                B(Star), R(17),
+                B(Mov), R(11), R(18),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(17), U8(2),
+                B(Ldar), R(16),
                 B(SetPendingMessage),
-                B(Ldar), R(4),
-                B(SwitchOnSmiNoFeedback), U8(13), U8(2), I8(0),
+                B(Ldar), R(14),
+                B(SwitchOnSmiNoFeedback), U8(10), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(5),
+                B(Ldar), R(15),
   /*   60 S> */ B(Return),
-                B(Ldar), R(5),
+                B(Ldar), R(15),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   60 S> */ B(Return),
 ]
 constant pool: [
-  FIXED_ARRAY_TYPE,
   SYMBOL_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
@@ -1495,11 +1334,11 @@ constant pool: [
   Smi [9],
 ]
 handlers: [
-  [21, 504, 510],
-  [24, 453, 455],
-  [41, 242, 248],
-  [44, 194, 196],
-  [334, 350, 352],
+  [21, 352, 358],
+  [24, 307, 309],
+  [30, 152, 158],
+  [33, 112, 114],
+  [218, 228, 230],
 ]
 
 ---
@@ -1509,329 +1348,275 @@ snippet: "
   }
   f([1, 2, 3]);
 "
-frame size: 18
+frame size: 29
 parameter count: 2
-bytecode array length: 710
+bytecode array length: 550
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(15),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(14),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(1), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(16),
+                B(CallRuntime), U16(Runtime::kAbort), R(16), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(11),
-                B(PushContext), R(0),
+                B(Star), R(14),
+                B(CreateFunctionContext), U8(1),
+                B(PushContext), R(12),
                 B(Ldar), R(arg0),
                 B(StaCurrentContextSlot), U8(4),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(5),
+                B(Mov), R(closure), R(16),
+                B(Mov), R(this), R(17),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(16), U8(2),
+                B(Star), R(2),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(5),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(5), U8(1),
-                B(StaCurrentContextSlot), U8(7),
-                B(Mov), R(context), R(7),
-                B(Mov), R(context), R(8),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(1),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(16),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(16), U8(1),
+                B(Star), R(4),
+                B(Mov), R(context), R(18),
+                B(Mov), R(context), R(19),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(11), U8(0),
-                B(Mov), R(context), R(11),
-                B(Mov), R(context), R(12),
-  /*   40 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(2), U8(3),
-                B(Star), R(14),
-                B(CallProperty0), R(14), R(13), U8(5),
+                B(Star), R(8),
+                B(Mov), R(context), R(22),
+                B(Mov), R(context), R(23),
+  /*   40 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
+                B(Star), R(24),
+                B(LdaNamedProperty), R(24), U8(1), U8(3),
+                B(Star), R(25),
+                B(CallProperty0), R(25), R(24), U8(5),
                 B(JumpIfJSReceiver), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
-  /*   40 E> */ B(StaContextSlot), R(1), U8(9), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(3), U8(1), I8(0),
+                B(Star), R(6),
+                B(Ldar), R(14),
+                B(SwitchOnSmiNoFeedback), U8(2), U8(1), I8(0),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   40 E> */ B(TestEqualStrictNoFeedback), R(14),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kAbort), R(13), U8(1),
-  /*   35 S> */ B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(14),
-                B(LdaNamedProperty), R(14), U8(4), U8(9),
-                B(Star), R(13),
-                B(CallProperty0), R(13), R(14), U8(7),
-  /*   35 E> */ B(StaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(13), U8(1),
+                B(Star), R(24),
+                B(CallRuntime), U16(Runtime::kAbort), R(24), U8(1),
+  /*   35 S> */ B(LdaNamedProperty), R(6), U8(3), U8(9),
+                B(Star), R(24),
+                B(CallProperty0), R(24), R(6), U8(7),
+                B(Star), R(7),
+  /*   35 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(7), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(13), U8(1),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(5), U8(11),
-                B(JumpIfToBooleanTrue), U8(155),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(6), U8(13),
-                B(StaContextSlot), R(1), U8(12), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(7), U8(1),
+                B(LdaNamedProperty), R(7), U8(4), U8(11),
+                B(JumpIfToBooleanTrue), U8(105),
+                B(LdaNamedProperty), R(7), U8(5), U8(13),
+                B(Star), R(9),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(11), U8(0),
-                B(LdaContextSlot), R(1), U8(12), U8(0),
-                B(StaContextSlot), R(1), U8(8), U8(0),
+                B(Star), R(8),
+                B(Mov), R(9), R(5),
   /*   26 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(7),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-  /*   45 S> */ B(LdaImmutableContextSlot), R(1), U8(5), U8(0),
-                B(Star), R(13),
-  /*   51 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
-                B(StaContextSlot), R(1), U8(6), U8(0),
+                B(Mov), R(5), R(0),
+  /*   45 S> */ B(Nop),
+  /*   51 S> */ B(Mov), R(5), R(3),
   /*   45 S> */ B(LdaUndefined),
-                B(Star), R(14),
-                B(LdaImmutableContextSlot), R(1), U8(5), U8(0),
-                B(Star), R(15),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(16),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(17),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(14), U8(4),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(14),
+                B(Star), R(25),
+                B(Mov), R(2), R(26),
+                B(Mov), R(5), R(27),
+                B(Mov), R(4), R(28),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(25), U8(4),
                 B(LdaZero),
-                B(SuspendGenerator), R(13), U8(2),
-                B(Ldar), R(14),
+                B(Mov), R(2), R(24),
+                B(Mov), R(4), R(25),
+                B(SuspendGenerator), R(24), U8(2),
+                B(Ldar), R(25),
   /*   54 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(13), U8(1),
                 B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(13), U8(1),
-                B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(24), U8(1),
+                B(Star), R(25),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(24), U8(1),
+                B(Star), R(26),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(15),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(26),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(17),
-                B(Mov), R(14), R(16),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
-                B(PopContext), R(2),
-                B(Star), R(10),
+                B(Star), R(28),
+                B(Mov), R(25), R(27),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(27), U8(2),
+                B(Star), R(21),
                 B(LdaZero),
-                B(Star), R(9),
-                B(Jump), U8(75),
-                B(Ldar), R(14),
+                B(Star), R(20),
+                B(Jump), U8(63),
+                B(Ldar), R(25),
                 B(ReThrow),
-                B(PopContext), R(2),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(11), U8(0),
-                B(JumpLoop), U8(223), I8(0),
-                B(Jump), U8(48),
-                B(Star), R(13),
+                B(Star), R(8),
+                B(JumpLoop), U8(151), I8(0),
+                B(Jump), U8(40),
+                B(Star), R(24),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(8), U8(9),
-                B(Star), R(12),
+                B(CreateCatchContext), R(24), U8(6), U8(7),
+                B(Star), R(23),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(13),
+                B(Ldar), R(23),
+                B(PushContext), R(13),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(13), U8(15),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(8), U8(15),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(11), U8(0),
+                B(Star), R(8),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kReThrow), R(13), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(24),
+                B(CallRuntime), U16(Runtime::kReThrow), R(24), U8(1),
+                B(PopContext), R(13),
                 B(LdaSmi), I8(-1),
-                B(Star), R(9),
+                B(Star), R(20),
                 B(Jump), U8(8),
-                B(Star), R(10),
+                B(Star), R(21),
                 B(LdaSmi), I8(1),
-                B(Star), R(9),
+                B(Star), R(20),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(12),
+                B(Star), R(22),
                 B(LdaZero),
-                B(TestEqualStrict), R(12), U8(16),
-                B(JumpIfTrue), U8(150),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(10), U8(17),
-                B(StaContextSlot), R(1), U8(13), U8(0),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
+                B(TestEqualStrict), R(8), U8(16),
+                B(JumpIfTrue), U8(104),
+                B(LdaNamedProperty), R(6), U8(8), U8(17),
+                B(Star), R(10),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(127),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(12),
+                B(Jump), U8(93),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(12), U8(20),
-                B(JumpIfFalse), U8(69),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
+                B(TestEqualStrict), R(8), U8(20),
+                B(JumpIfFalse), U8(61),
+                B(Ldar), R(10),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(12),
-                B(LdaConstant), U8(11),
-                B(Star), R(13),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(12), U8(2),
+                B(Star), R(23),
+                B(LdaConstant), U8(9),
+                B(Star), R(24),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(23), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(12),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
-                B(Star), R(13),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(14),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(13), U8(2),
+                B(Mov), R(context), R(23),
+                B(Mov), R(10), R(24),
+                B(Mov), R(6), R(25),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(24), U8(2),
                 B(Jump), U8(20),
-                B(Star), R(13),
+                B(Star), R(24),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(13), U8(8), U8(12),
-                B(Star), R(12),
+                B(CreateCatchContext), R(24), U8(6), U8(10),
+                B(Star), R(23),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(12),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(47),
-                B(LdaContextSlot), R(1), U8(13), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(12), U8(2),
-                B(StaContextSlot), R(1), U8(14), U8(0),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
+                B(Ldar), R(23),
+                B(PushContext), R(13),
+                B(PopContext), R(13),
+                B(Jump), U8(27),
+                B(Mov), R(10), R(23),
+                B(Mov), R(6), R(24),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(23), U8(2),
+                B(Star), R(11),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(11), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(14), U8(0),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(Ldar), R(11),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(11), U8(1),
+                B(Ldar), R(22),
                 B(SetPendingMessage),
-                B(Ldar), R(9),
-                B(SwitchOnSmiNoFeedback), U8(13), U8(2), I8(0),
-                B(Jump), U8(15),
-                B(PopContext), R(1),
+                B(Ldar), R(20),
+                B(SwitchOnSmiNoFeedback), U8(11), U8(2), I8(0),
+                B(Jump), U8(13),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Mov), R(10), R(6),
-                B(Jump), U8(93),
-                B(Ldar), R(10),
+                B(Star), R(16),
+                B(Mov), R(21), R(17),
+                B(Jump), U8(83),
+                B(Ldar), R(21),
                 B(ReThrow),
-                B(PopContext), R(1),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(10),
+                B(Star), R(20),
                 B(LdaUndefined),
-                B(Star), R(11),
-                B(CallJSRuntime), U8(%promise_resolve), R(9), U8(3),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(6),
+                B(Star), R(22),
+                B(Mov), R(4), R(21),
+                B(CallJSRuntime), U8(%promise_resolve), R(20), U8(3),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(65),
-                B(Jump), U8(51),
-                B(Star), R(9),
+                B(Star), R(16),
+                B(Mov), R(4), R(17),
+                B(Jump), U8(59),
+                B(Jump), U8(45),
+                B(Star), R(20),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(9), U8(8), U8(15),
-                B(Star), R(8),
+                B(CreateCatchContext), R(20), U8(6), U8(13),
+                B(Star), R(19),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(PushContext), R(1),
+                B(Ldar), R(19),
+                B(PushContext), R(13),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(10),
+                B(Star), R(20),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(11),
+                B(Star), R(22),
                 B(LdaFalse),
-                B(Star), R(12),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(9), U8(4),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(23),
+                B(Mov), R(4), R(21),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(20), U8(4),
+                B(PopContext), R(13),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(16),
+                B(Mov), R(4), R(17),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(16),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(17),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
+                B(Star), R(16),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
+                B(Star), R(18),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(9),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(8), U8(2),
-                B(Ldar), R(7),
+                B(Star), R(19),
+                B(Mov), R(4), R(20),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(19), U8(2),
+                B(Ldar), R(18),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(16), U8(2), I8(0),
+                B(Ldar), R(16),
+                B(SwitchOnSmiNoFeedback), U8(14), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(6),
+                B(Ldar), R(17),
   /*   54 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(17),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   54 S> */ B(Return),
 ]
 constant pool: [
-  Smi [100],
-  FIXED_ARRAY_TYPE,
+  Smi [85],
   SYMBOL_TYPE,
-  Smi [165],
+  Smi [99],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
   Smi [6],
-  Smi [16],
+  Smi [14],
   FIXED_ARRAY_TYPE,
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [64, 664, 670],
-  [67, 613, 615],
-  [84, 388, 394],
-  [87, 340, 342],
-  [481, 497, 499],
+  [64, 505, 511],
+  [67, 460, 462],
+  [73, 293, 299],
+  [76, 253, 255],
+  [360, 370, 372],
 ]
 

test/cctest/interpreter/bytecode_expectations/Generators.golden

@@ -13,7 +13,7 @@ snippet: "
 "
 frame size: 11
 parameter count: 1
-bytecode array length: 173
+bytecode array length: 163
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
@@ -27,19 +27,15 @@ bytecodes: [
                 B(CallRuntime), U16(Runtime::kAbort), R(3), U8(1),
                 B(LdaSmi), I8(-2),
                 B(Star), R(1),
-                B(CreateFunctionContext), U8(1),
-                B(PushContext), R(0),
                 B(Mov), R(closure), R(3),
                 B(Mov), R(this), R(4),
                 B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(3), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(0),
   /*   11 E> */ B(StackCheck),
                 B(Mov), R(context), R(5),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(6),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(7),
                 B(LdaZero),
+                B(Mov), R(0), R(7),
+                B(Mov), R(0), R(6),
   /*   11 E> */ B(SuspendGenerator), R(6), U8(0),
                 B(Ldar), R(7),
   /*   16 S> */ B(Return),
@@ -83,9 +79,7 @@ bytecodes: [
                 B(LdaTheHole),
                 B(SetPendingMessage),
                 B(Star), R(5),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(6), U8(1),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(0), U8(1),
                 B(Ldar), R(5),
                 B(SetPendingMessage),
                 B(Ldar), R(3),
@@ -99,12 +93,12 @@ bytecodes: [
   /*   16 S> */ B(Return),
 ]
 constant pool: [
-  Smi [52],
+  Smi [46],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [51, 130, 136],
+  [47, 124, 130],
 ]
 
 ---
@@ -114,7 +108,7 @@ snippet: "
 "
 frame size: 11
 parameter count: 1
-bytecode array length: 245
+bytecode array length: 234
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
@@ -128,19 +122,15 @@ bytecodes: [
                 B(CallRuntime), U16(Runtime::kAbort), R(3), U8(1),
                 B(LdaSmi), I8(-2),
                 B(Star), R(1),
-                B(CreateFunctionContext), U8(1),
-                B(PushContext), R(0),
                 B(Mov), R(closure), R(3),
                 B(Mov), R(this), R(4),
                 B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(3), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(0),
   /*   11 E> */ B(StackCheck),
                 B(Mov), R(context), R(5),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(6),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(7),
                 B(LdaZero),
+                B(Mov), R(0), R(7),
+                B(Mov), R(0), R(6),
   /*   11 E> */ B(SuspendGenerator), R(6), U8(0),
                 B(Ldar), R(7),
   /*   25 S> */ B(Return),
@@ -163,18 +153,17 @@ bytecodes: [
                 B(Star), R(4),
                 B(LdaZero),
                 B(Star), R(3),
-                B(Jump), U8(106),
+                B(Jump), U8(105),
                 B(Ldar), R(7),
   /*   11 E> */ B(Throw),
-  /*   16 S> */ B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(6),
-                B(LdaSmi), I8(42),
+  /*   16 S> */ B(LdaSmi), I8(42),
                 B(Star), R(7),
                 B(LdaFalse),
                 B(Star), R(8),
   /*   16 E> */ B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(7), U8(2),
                 B(Star), R(7),
                 B(LdaSmi), I8(1),
+                B(Mov), R(0), R(6),
                 B(SuspendGenerator), R(6), U8(0),
                 B(Ldar), R(7),
   /*   25 S> */ B(Return),
@@ -218,9 +207,7 @@ bytecodes: [
                 B(LdaTheHole),
                 B(SetPendingMessage),
                 B(Star), R(5),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(6), U8(1),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(0), U8(1),
                 B(Ldar), R(5),
                 B(SetPendingMessage),
                 B(Ldar), R(3),
@@ -234,13 +221,13 @@ bytecodes: [
   /*   25 S> */ B(Return),
 ]
 constant pool: [
-  Smi [52],
-  Smi [124],
+  Smi [46],
+  Smi [117],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [51, 202, 208],
+  [47, 195, 201],
 ]
 
 ---
@@ -248,318 +235,265 @@ snippet: "
   function* f() { for (let x of [42]) yield x }
   f();
 "
-frame size: 17
+frame size: 25
 parameter count: 1
-bytecode array length: 677
+bytecode array length: 529
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(12),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(11),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(2), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(13),
+                B(CallRuntime), U16(Runtime::kAbort), R(13), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(8),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(11),
+                B(Mov), R(closure), R(13),
+                B(Mov), R(this), R(14),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(13), U8(2),
+                B(Star), R(2),
   /*   11 E> */ B(StackCheck),
-                B(Mov), R(context), R(7),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(8),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(9),
+                B(Mov), R(context), R(15),
                 B(LdaZero),
-  /*   11 E> */ B(SuspendGenerator), R(8), U8(0),
-                B(Ldar), R(9),
+                B(Mov), R(2), R(17),
+                B(Mov), R(2), R(16),
+  /*   11 E> */ B(SuspendGenerator), R(16), U8(0),
+                B(Ldar), R(17),
   /*   44 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(8), U8(1),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(8), U8(1),
-                B(Star), R(10),
+                B(Star), R(11),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(16), U8(1),
+                B(Star), R(17),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(16), U8(1),
+                B(Star), R(18),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(10),
+                B(TestEqualStrictNoFeedback), R(18),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(10),
+                B(TestEqualStrictNoFeedback), R(18),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(12),
-                B(Mov), R(9), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(11), U8(2),
-                B(Star), R(6),
+                B(Star), R(20),
+                B(Mov), R(17), R(19),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(19), U8(2),
+                B(Star), R(14),
                 B(LdaZero),
-                B(Star), R(5),
-                B(JumpConstant), U8(17),
-                B(Ldar), R(9),
+                B(Star), R(13),
+                B(JumpConstant), U8(15),
+                B(Ldar), R(17),
   /*   11 E> */ B(Throw),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(2),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Mov), R(context), R(10),
-                B(Mov), R(context), R(11),
-  /*   30 S> */ B(CreateArrayLiteral), U8(3), U8(3), U8(17),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(4), U8(4),
-                B(Star), R(13),
-                B(CallProperty0), R(13), R(12), U8(6),
+                B(Star), R(6),
+                B(Mov), R(context), R(18),
+                B(Mov), R(context), R(19),
+  /*   30 S> */ B(CreateArrayLiteral), U8(2), U8(3), U8(17),
+                B(Star), R(20),
+                B(LdaNamedProperty), R(20), U8(3), U8(4),
+                B(Star), R(21),
+                B(CallProperty0), R(21), R(20), U8(6),
                 B(JumpIfJSReceiver), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
-  /*   30 E> */ B(StaContextSlot), R(1), U8(6), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(5), U8(1), I8(1),
+                B(Star), R(4),
+                B(Ldar), R(11),
+                B(SwitchOnSmiNoFeedback), U8(4), U8(1), I8(1),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   30 E> */ B(TestEqualStrictNoFeedback), R(11),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kAbort), R(12), U8(1),
-  /*   25 S> */ B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(13),
-                B(LdaNamedProperty), R(13), U8(6), U8(10),
-                B(Star), R(12),
-                B(CallProperty0), R(12), R(13), U8(8),
-  /*   25 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(12), U8(1),
+                B(Star), R(20),
+                B(CallRuntime), U16(Runtime::kAbort), R(20), U8(1),
+  /*   25 S> */ B(LdaNamedProperty), R(4), U8(5), U8(10),
+                B(Star), R(20),
+                B(CallProperty0), R(20), R(4), U8(8),
+                B(Star), R(5),
+  /*   25 E> */ B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(5), U8(1),
                 B(ToBooleanLogicalNot),
-                B(JumpIfFalse), U8(13),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(12), U8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(7), U8(12),
-                B(JumpIfToBooleanTrue), U8(132),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(12),
-                B(LdaNamedProperty), R(12), U8(8), U8(14),
-                B(StaContextSlot), R(1), U8(9), U8(0),
+                B(JumpIfFalse), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(5), U8(1),
+                B(LdaNamedProperty), R(5), U8(6), U8(12),
+                B(JumpIfToBooleanTrue), U8(95),
+                B(LdaNamedProperty), R(5), U8(7), U8(14),
+                B(Star), R(7),
                 B(LdaSmi), I8(2),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(StaContextSlot), R(1), U8(5), U8(0),
+                B(Star), R(6),
+                B(Mov), R(7), R(3),
   /*   16 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(9),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-  /*   36 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(12),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(13),
-                B(LdaFalse),
-                B(Star), R(14),
-  /*   42 E> */ B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(13), U8(2),
-                B(Star), R(13),
+                B(Mov), R(3), R(0),
+  /*   36 S> */ B(LdaFalse),
+                B(Star), R(22),
+                B(Mov), R(3), R(21),
+  /*   42 E> */ B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(21), U8(2),
+                B(Star), R(21),
                 B(LdaSmi), I8(1),
-                B(SuspendGenerator), R(12), U8(0),
-                B(Ldar), R(13),
+                B(Mov), R(2), R(20),
+                B(SuspendGenerator), R(20), U8(0),
+                B(Ldar), R(21),
   /*   44 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(12), U8(1),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(12), U8(1),
-                B(Star), R(14),
+                B(Star), R(11),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(20), U8(1),
+                B(Star), R(21),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(20), U8(1),
+                B(Star), R(22),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(22),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(14),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(22),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(16),
-                B(Mov), R(13), R(15),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
-                B(PopContext), R(2),
-                B(Star), R(9),
+                B(Star), R(24),
+                B(Mov), R(21), R(23),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(23), U8(2),
+                B(Star), R(17),
                 B(LdaZero),
-                B(Star), R(8),
-                B(Jump), U8(71),
-                B(Ldar), R(13),
+                B(Star), R(16),
+                B(Jump), U8(59),
+                B(Ldar), R(21),
   /*   36 E> */ B(Throw),
-                B(PopContext), R(2),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(JumpLoop), U8(200), I8(0),
-                B(Jump), U8(44),
-                B(Star), R(12),
+                B(Star), R(6),
+                B(JumpLoop), U8(141), I8(0),
+                B(Jump), U8(36),
+                B(Star), R(20),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(12), U8(10), U8(11),
-                B(PushContext), R(2),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(12),
+                B(CreateCatchContext), R(20), U8(8), U8(9),
+                B(PushContext), R(10),
+                B(Star), R(19),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(12), U8(16),
-                B(JumpIfFalse), U8(8),
+                B(TestEqualStrict), R(6), U8(16),
+                B(JumpIfFalse), U8(6),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(8), U8(0),
+                B(Star), R(6),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kReThrow), R(12), U8(1),
-                B(PopContext), R(2),
+                B(Star), R(20),
+                B(CallRuntime), U16(Runtime::kReThrow), R(20), U8(1),
+                B(PopContext), R(10),
                 B(LdaSmi), I8(-1),
-                B(Star), R(8),
+                B(Star), R(16),
                 B(Jump), U8(8),
-                B(Star), R(9),
+                B(Star), R(17),
                 B(LdaSmi), I8(1),
-                B(Star), R(8),
+                B(Star), R(16),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(10),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(11),
+                B(Star), R(18),
                 B(LdaZero),
-                B(TestEqualStrict), R(11), U8(17),
-                B(JumpIfTrue), U8(150),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(11),
-                B(LdaNamedProperty), R(11), U8(12), U8(18),
-                B(StaContextSlot), R(1), U8(10), U8(0),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
+                B(TestEqualStrict), R(6), U8(17),
+                B(JumpIfTrue), U8(104),
+                B(LdaNamedProperty), R(4), U8(10), U8(18),
+                B(Star), R(8),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(127),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(11),
+                B(Jump), U8(93),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(11), U8(21),
-                B(JumpIfFalse), U8(69),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
+                B(TestEqualStrict), R(6), U8(21),
+                B(JumpIfFalse), U8(61),
+                B(Ldar), R(8),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(11),
-                B(LdaConstant), U8(13),
-                B(Star), R(12),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(11), U8(2),
+                B(Star), R(19),
+                B(LdaConstant), U8(11),
+                B(Star), R(20),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(19), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(11),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(13),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(12), U8(2),
+                B(Mov), R(context), R(19),
+                B(Mov), R(8), R(20),
+                B(Mov), R(4), R(21),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(20), U8(2),
                 B(Jump), U8(20),
-                B(Star), R(12),
+                B(Star), R(20),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(12), U8(10), U8(14),
-                B(Star), R(11),
+                B(CreateCatchContext), R(20), U8(8), U8(12),
+                B(Star), R(19),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(11),
-                B(PushContext), R(2),
-                B(PopContext), R(2),
-                B(Jump), U8(47),
-                B(LdaContextSlot), R(1), U8(10), U8(0),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(11), U8(2),
-                B(StaContextSlot), R(1), U8(11), U8(0),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(11), U8(1),
+                B(Ldar), R(19),
+                B(PushContext), R(10),
+                B(PopContext), R(10),
+                B(Jump), U8(27),
+                B(Mov), R(8), R(19),
+                B(Mov), R(4), R(20),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(19), U8(2),
+                B(Star), R(9),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(9), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(13),
-                B(LdaContextSlot), R(1), U8(11), U8(0),
-                B(Star), R(11),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(11), U8(1),
-                B(Ldar), R(10),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(9), U8(1),
+                B(Ldar), R(18),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(SwitchOnSmiNoFeedback), U8(15), U8(2), I8(0),
-                B(Jump), U8(23),
-                B(PopContext), R(1),
+                B(Ldar), R(16),
+                B(SwitchOnSmiNoFeedback), U8(13), U8(2), I8(0),
+                B(Jump), U8(19),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Mov), R(9), R(6),
-                B(Jump), U8(44),
-                B(PopContext), R(1),
+                B(Star), R(13),
+                B(Mov), R(17), R(14),
+                B(Jump), U8(40),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
-                B(Mov), R(9), R(6),
-                B(Jump), U8(33),
-                B(PopContext), R(1),
+                B(Star), R(13),
+                B(Mov), R(17), R(14),
+                B(Jump), U8(31),
                 B(LdaUndefined),
-                B(Star), R(8),
+                B(Star), R(16),
                 B(LdaTrue),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(8), U8(2),
-                B(Star), R(6),
+                B(Star), R(17),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
+                B(Star), R(14),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(13),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(13),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(14),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
+                B(Star), R(13),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(8), U8(1),
-                B(Ldar), R(7),
+                B(Star), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(2), U8(1),
+                B(Ldar), R(15),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(18), U8(2), I8(0),
+                B(Ldar), R(13),
+                B(SwitchOnSmiNoFeedback), U8(16), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(6),
+                B(Ldar), R(14),
   /*   44 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(14),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   44 S> */ B(Return),
 ]
 constant pool: [
-  Smi [52],
-  Smi [146],
-  FIXED_ARRAY_TYPE,
+  Smi [46],
+  Smi [127],
   TUPLE2_TYPE,
   SYMBOL_TYPE,
-  Smi [142],
+  Smi [89],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   FIXED_ARRAY_TYPE,
   Smi [6],
-  Smi [16],
-  Smi [538],
+  Smi [14],
+  Smi [400],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [51, 634, 640],
-  [130, 407, 413],
-  [133, 363, 365],
-  [500, 516, 518],
+  [47, 490, 496],
+  [113, 321, 327],
+  [116, 285, 287],
+  [388, 398, 400],
 ]
 
 ---
@@ -568,332 +502,269 @@ snippet: "
   function* f() { yield* g() }
   f();
 "
-frame size: 12
+frame size: 20
 parameter count: 1
-bytecode array length: 679
+bytecode array length: 573
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(3),
+                B(PushContext), R(11),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(2),
+                B(Star), R(10),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(2), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(4),
-                B(CallRuntime), U16(Runtime::kAbort), R(4), U8(1),
+                B(Star), R(12),
+                B(CallRuntime), U16(Runtime::kAbort), R(12), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(2),
-                B(CreateFunctionContext), U8(9),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(4),
-                B(Mov), R(this), R(5),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(4), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(10),
+                B(Mov), R(closure), R(12),
+                B(Mov), R(this), R(13),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(12), U8(2),
+                B(Star), R(0),
   /*   38 E> */ B(StackCheck),
-                B(Mov), R(context), R(6),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(7),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(8),
+                B(Mov), R(context), R(14),
                 B(LdaZero),
-  /*   38 E> */ B(SuspendGenerator), R(7), U8(0),
-                B(Ldar), R(8),
+                B(Mov), R(0), R(16),
+                B(Mov), R(0), R(15),
+  /*   38 E> */ B(SuspendGenerator), R(15), U8(0),
+                B(Ldar), R(16),
   /*   54 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(2),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(7), U8(1),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(7), U8(1),
-                B(Star), R(9),
+                B(Star), R(10),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(15), U8(1),
+                B(Star), R(16),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(15), U8(1),
+                B(Star), R(17),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(9),
+                B(TestEqualStrictNoFeedback), R(17),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(9),
+                B(TestEqualStrictNoFeedback), R(17),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(11),
-                B(Mov), R(8), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(10), U8(2),
-                B(Star), R(5),
+                B(Star), R(19),
+                B(Mov), R(16), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(18), U8(2),
+                B(Star), R(13),
                 B(LdaZero),
-                B(Star), R(4),
-                B(JumpConstant), U8(15),
-                B(Ldar), R(8),
+                B(Star), R(12),
+                B(JumpConstant), U8(13),
+                B(Ldar), R(16),
   /*   38 E> */ B(Throw),
   /*   43 S> */ B(LdaUndefined),
-                B(StaCurrentContextSlot), U8(5),
+                B(Star), R(1),
                 B(LdaZero),
-                B(StaCurrentContextSlot), U8(6),
+                B(Star), R(2),
                 B(LdaUndefined),
-                B(StaCurrentContextSlot), U8(7),
+                B(Star), R(3),
                 B(LdaGlobal), U8(2), U8(5),
-                B(Star), R(9),
-  /*   50 E> */ B(CallUndefinedReceiver0), R(9), U8(3),
-                B(Star), R(7),
-                B(LdaNamedProperty), R(7), U8(3), U8(7),
-                B(Star), R(8),
-                B(CallProperty0), R(8), R(7), U8(9),
+                B(Star), R(17),
+  /*   50 E> */ B(CallUndefinedReceiver0), R(17), U8(3),
+                B(Star), R(15),
+                B(LdaNamedProperty), R(15), U8(3), U8(7),
+                B(Star), R(16),
+                B(CallProperty0), R(16), R(15), U8(9),
                 B(JumpIfJSReceiver), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowSymbolIteratorInvalid), R(0), U8(0),
-                B(StaCurrentContextSlot), U8(8),
-                B(Ldar), R(2),
+                B(Star), R(4),
+                B(Ldar), R(10),
                 B(SwitchOnSmiNoFeedback), U8(4), U8(1), I8(1),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(2),
+                B(TestEqualStrictNoFeedback), R(10),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(7),
-                B(CallRuntime), U16(Runtime::kAbort), R(7), U8(1),
+                B(Star), R(15),
+                B(CallRuntime), U16(Runtime::kAbort), R(15), U8(1),
                 B(StackCheck),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(7),
                 B(LdaZero),
-                B(TestEqualStrict), R(7), U8(15),
+                B(TestEqualStrict), R(2), U8(15),
+                B(Mov), R(2), R(15),
                 B(JumpIfTrue), U8(18),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(7), U8(19),
-                B(JumpIfTrue), U8(55),
+                B(TestEqualStrict), R(15), U8(19),
+                B(JumpIfTrue), U8(39),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrict), R(7), U8(28),
-                B(JumpIfTrue), U8(122),
-                B(JumpConstant), U8(11),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(9),
-                B(LdaNamedProperty), R(9), U8(5), U8(13),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(5),
-                B(Star), R(10),
-                B(CallProperty1), R(8), R(9), R(10), U8(11),
-                B(StaCurrentContextSlot), U8(7),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(8), U8(1),
+                B(TestEqualStrict), R(15), U8(28),
+                B(JumpIfTrue), U8(88),
+                B(Jump), U8(246),
+                B(LdaNamedProperty), R(4), U8(5), U8(13),
+                B(Star), R(16),
+                B(CallProperty1), R(16), R(4), R(1), U8(11),
+                B(Star), R(3),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(3), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(11),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(8), U8(1),
-                B(JumpConstant), U8(12),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(8),
-                B(LdaNamedProperty), R(8), U8(6), U8(16),
-                B(StaCurrentContextSlot), U8(7),
-                B(LdaCurrentContextSlot), U8(7),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(3), U8(1),
+                B(Jump), U8(218),
+                B(LdaNamedProperty), R(4), U8(6), U8(16),
+                B(Star), R(3),
                 B(TestUndetectable),
-                B(JumpIfFalse), U8(20),
-                B(LdaCurrentContextSlot), U8(5),
-                B(Star), R(8),
+                B(JumpIfFalse), U8(19),
                 B(LdaTrue),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(8), U8(2),
-                B(Star), R(5),
+                B(Star), R(17),
+                B(Mov), R(1), R(16),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(16), U8(2),
+                B(Star), R(13),
                 B(LdaZero),
-                B(Star), R(4),
-                B(JumpConstant), U8(16),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(5),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(8), U8(3),
-                B(StaCurrentContextSlot), U8(7),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(8), U8(1),
+                B(Star), R(12),
+                B(JumpConstant), U8(14),
+                B(Mov), R(3), R(16),
+                B(Mov), R(4), R(17),
+                B(Mov), R(1), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(16), U8(3),
+                B(Star), R(3),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(3), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(11),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(8), U8(1),
-                B(Jump), U8(197),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(8),
-                B(LdaNamedProperty), R(8), U8(7), U8(20),
-                B(StaCurrentContextSlot), U8(9),
-                B(LdaCurrentContextSlot), U8(9),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(3), U8(1),
+                B(Jump), U8(162),
+                B(LdaNamedProperty), R(4), U8(7), U8(20),
+                B(Star), R(5),
                 B(TestUndetectable),
-                B(JumpIfFalse), U8(141),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(8),
-                B(LdaNamedProperty), R(8), U8(6), U8(23),
-                B(StaCurrentContextSlot), U8(10),
-                B(LdaCurrentContextSlot), U8(10),
+                B(JumpIfFalse), U8(123),
+                B(LdaNamedProperty), R(4), U8(6), U8(23),
+                B(Star), R(6),
                 B(TestUndetectable),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(108),
+                B(Jump), U8(96),
                 B(LdaZero),
-                B(Star), R(8),
+                B(Star), R(16),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(8), U8(26),
-                B(JumpIfFalse), U8(63),
-                B(LdaCurrentContextSlot), U8(10),
+                B(TestEqualStrict), R(16), U8(26),
+                B(JumpIfFalse), U8(61),
+                B(Ldar), R(6),
                 B(TestTypeOf), U8(5),
                 B(JumpIfFalse), U8(4),
                 B(Jump), U8(18),
                 B(Wide), B(LdaSmi), I16(130),
-                B(Star), R(8),
+                B(Star), R(16),
                 B(LdaConstant), U8(8),
-                B(Star), R(9),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(8), U8(2),
+                B(Star), R(17),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(16), U8(2),
                 B(Throw),
-                B(Mov), R(context), R(8),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(9), U8(2),
+                B(Mov), R(context), R(16),
+                B(Mov), R(6), R(17),
+                B(Mov), R(4), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(17), U8(2),
                 B(Jump), U8(20),
-                B(Star), R(9),
+                B(Star), R(17),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(9), U8(9), U8(10),
-                B(Star), R(8),
+                B(CreateCatchContext), R(17), U8(9), U8(10),
+                B(Star), R(16),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(PushContext), R(1),
-                B(PopContext), R(1),
-                B(Jump), U8(37),
-                B(LdaCurrentContextSlot), U8(10),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(8), U8(2),
-                B(StaCurrentContextSlot), U8(11),
-                B(LdaCurrentContextSlot), U8(11),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(8), U8(1),
+                B(Ldar), R(16),
+                B(PushContext), R(9),
+                B(PopContext), R(9),
+                B(Jump), U8(27),
+                B(Mov), R(6), R(16),
+                B(Mov), R(4), R(17),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(16), U8(2),
+                B(Star), R(7),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(7), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(11),
-                B(LdaCurrentContextSlot), U8(11),
-                B(Star), R(8),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(8), U8(1),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(7), U8(1),
                 B(Wide), B(LdaSmi), I16(144),
-                B(Star), R(8),
+                B(Star), R(16),
                 B(LdaConstant), U8(8),
-                B(Star), R(9),
-                B(CallRuntime), U16(Runtime::kNewTypeError), R(8), U8(2),
+                B(Star), R(17),
+                B(CallRuntime), U16(Runtime::kNewTypeError), R(16), U8(2),
                 B(Throw),
-                B(LdaCurrentContextSlot), U8(9),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(5),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_Call), R(8), U8(3),
-                B(StaCurrentContextSlot), U8(7),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(8), U8(1),
+                B(Mov), R(5), R(16),
+                B(Mov), R(4), R(17),
+                B(Mov), R(1), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_Call), R(16), U8(3),
+                B(Star), R(3),
+                B(InvokeIntrinsic), U8(Runtime::k_IsJSReceiver), R(3), U8(1),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(11),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
-                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(8), U8(1),
+                B(Jump), U8(7),
+                B(CallRuntime), U16(Runtime::kThrowIteratorResultNotAnObject), R(3), U8(1),
                 B(Jump), U8(2),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(7),
-                B(LdaNamedProperty), R(7), U8(13), U8(29),
+                B(LdaNamedProperty), R(3), U8(11), U8(29),
                 B(JumpIfToBooleanFalse), U8(4),
-                B(Jump), U8(52),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(7),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(8),
+                B(Jump), U8(42),
                 B(LdaSmi), I8(1),
-                B(SuspendGenerator), R(7), U8(1),
-                B(Ldar), R(8),
+                B(Mov), R(0), R(15),
+                B(Mov), R(3), R(16),
+                B(SuspendGenerator), R(15), U8(1),
+                B(Ldar), R(16),
   /*   54 S> */ B(Return),
                 B(LdaSmi), I8(-2),
+                B(Star), R(10),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(15), U8(1),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(0), U8(1),
+                B(Star), R(1),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(0), U8(1),
                 B(Star), R(2),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(7), U8(1),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(7),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(7), U8(1),
-                B(StaCurrentContextSlot), U8(5),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(7),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(7), U8(1),
-                B(StaCurrentContextSlot), U8(6),
-                B(Wide), B(JumpLoop), U16(418), I16(0),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(7),
+                B(Wide), B(JumpLoop), U16(334), I16(0),
                 B(LdaSmi), I8(1),
-                B(TestEqualStrict), R(7), U8(31),
-                B(JumpIfFalse), U8(26),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(7),
-                B(LdaNamedProperty), R(7), U8(14), U8(32),
-                B(Star), R(7),
+                B(TestEqualStrict), R(2), U8(31),
+                B(JumpIfFalse), U8(22),
+                B(LdaNamedProperty), R(3), U8(12), U8(32),
+                B(Star), R(15),
                 B(LdaTrue),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(7), U8(2),
-                B(Star), R(5),
+                B(Star), R(16),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
+                B(Star), R(13),
                 B(LdaZero),
-                B(Star), R(4),
-                B(Jump), U8(41),
-                B(LdaCurrentContextSlot), U8(7),
-                B(Star), R(7),
-                B(LdaNamedProperty), R(7), U8(14), U8(34),
-                B(StaCurrentContextSlot), U8(12),
+                B(Star), R(12),
+                B(Jump), U8(37),
+                B(LdaNamedProperty), R(3), U8(12), U8(34),
+                B(Star), R(8),
                 B(LdaUndefined),
-                B(Star), R(7),
+                B(Star), R(15),
                 B(LdaTrue),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(7), U8(2),
-                B(Star), R(5),
+                B(Star), R(16),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
+                B(Star), R(13),
                 B(LdaZero),
-                B(Star), R(4),
+                B(Star), R(12),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(4),
+                B(Star), R(12),
                 B(Jump), U8(8),
-                B(Star), R(5),
+                B(Star), R(13),
                 B(LdaSmi), I8(1),
-                B(Star), R(4),
+                B(Star), R(12),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(6),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(7),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(7), U8(1),
-                B(Ldar), R(6),
+                B(Star), R(14),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(0), U8(1),
+                B(Ldar), R(14),
                 B(SetPendingMessage),
-                B(Ldar), R(4),
-                B(SwitchOnSmiNoFeedback), U8(17), U8(2), I8(0),
+                B(Ldar), R(12),
+                B(SwitchOnSmiNoFeedback), U8(15), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(5),
+                B(Ldar), R(13),
   /*   54 S> */ B(Return),
-                B(Ldar), R(5),
+                B(Ldar), R(13),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   54 S> */ B(Return),
 ]
 constant pool: [
-  Smi [52],
-  Smi [137],
+  Smi [46],
+  Smi [131],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["g"],
   SYMBOL_TYPE,
-  Smi [387],
+  Smi [311],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["next"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["return"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["throw"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [""],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
-  Smi [315],
-  Smi [271],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["done"],
   ONE_BYTE_INTERNALIZED_STRING_TYPE ["value"],
-  Smi [540],
-  Smi [374],
+  Smi [444],
+  Smi [302],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [51, 636, 642],
-  [386, 398, 400],
+  [47, 534, 540],
+  [333, 343, 345],
 ]
 

test/cctest/interpreter/bytecode_expectations/StandardForLoop.golden

@@ -271,172 +271,132 @@ snippet: "
   }
   f();
 "
-frame size: 14
+frame size: 17
 parameter count: 1
-bytecode array length: 331
+bytecode array length: 243
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(5),
+                B(PushContext), R(8),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(4),
+                B(Star), R(7),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(1), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(6),
-                B(CallRuntime), U16(Runtime::kAbort), R(6), U8(1),
+                B(Star), R(9),
+                B(CallRuntime), U16(Runtime::kAbort), R(9), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(4),
-                B(CreateFunctionContext), U8(4),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(6),
-                B(Mov), R(this), R(7),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(6), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(7),
+                B(Mov), R(closure), R(9),
+                B(Mov), R(this), R(10),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(9), U8(2),
+                B(Star), R(3),
   /*   11 E> */ B(StackCheck),
-                B(Mov), R(context), R(8),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(9),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(10),
+                B(Mov), R(context), R(11),
                 B(LdaZero),
-  /*   11 E> */ B(SuspendGenerator), R(9), U8(0),
-                B(Ldar), R(10),
+                B(Mov), R(3), R(13),
+                B(Mov), R(3), R(12),
+  /*   11 E> */ B(SuspendGenerator), R(12), U8(0),
+                B(Ldar), R(13),
   /*   62 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(4),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(9), U8(1),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(9), U8(1),
-                B(Star), R(11),
+                B(Star), R(7),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(12), U8(1),
+                B(Star), R(13),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(12), U8(1),
+                B(Star), R(14),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(11),
+                B(TestEqualStrictNoFeedback), R(14),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(11),
+                B(TestEqualStrictNoFeedback), R(14),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(13),
-                B(Mov), R(10), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(12), U8(2),
-                B(Star), R(7),
+                B(Star), R(16),
+                B(Mov), R(13), R(15),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(15), U8(2),
+                B(Star), R(10),
                 B(LdaZero),
-                B(Star), R(6),
-                B(Jump), U8(192),
-                B(Ldar), R(10),
+                B(Star), R(9),
+                B(Jump), U8(114),
+                B(Ldar), R(13),
   /*   11 E> */ B(Throw),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(1),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
   /*   31 S> */ B(LdaZero),
-  /*   31 E> */ B(StaCurrentContextSlot), U8(4),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-  /*   60 E> */ B(StaContextSlot), R(1), U8(5), U8(0),
+                B(Star), R(2),
+                B(Star), R(4),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(6), U8(0),
-                B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(2),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(9),
+                B(Star), R(5),
+  /*   60 E> */ B(StackCheck),
+                B(Mov), R(4), R(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(9), U8(3),
-                B(JumpIfFalse), U8(9),
+                B(TestEqual), R(5), U8(3),
+                B(JumpIfFalse), U8(7),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(6), U8(0),
+                B(Star), R(5),
                 B(Jump), U8(8),
-  /*   44 S> */ B(LdaCurrentContextSlot), U8(4),
+  /*   44 S> */ B(Ldar), R(1),
                 B(Inc), U8(4),
-  /*   44 E> */ B(StaCurrentContextSlot), U8(4),
+                B(Star), R(1),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(7), U8(0),
-  /*   36 S> */ B(LdaCurrentContextSlot), U8(4),
-                B(Star), R(9),
-                B(LdaSmi), I8(10),
-  /*   36 E> */ B(TestLessThan), R(9), U8(5),
+                B(Star), R(6),
+  /*   36 S> */ B(LdaSmi), I8(10),
+  /*   36 E> */ B(TestLessThan), R(1), U8(5),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(69),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(9),
+                B(Jump), U8(4),
+                B(Jump), U8(36),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(9), U8(6),
-                B(JumpIfFalse), U8(34),
+                B(TestEqual), R(6), U8(6),
+                B(JumpIfFalse), U8(17),
   /*   18 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(3),
-                B(PushContext), R(3),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-  /*   57 S> */ B(LdaContextSlot), R(3), U8(4), U8(0),
-  /*   57 E> */ B(StaCurrentContextSlot), U8(4),
-                B(PopContext), R(3),
+  /*   57 S> */ B(Mov), R(1), R(0),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(7), U8(0),
-                B(LdaCurrentContextSlot), U8(4),
-  /*   60 E> */ B(StaContextSlot), R(1), U8(5), U8(0),
-                B(JumpLoop), U8(42), I8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(9),
+                B(Star), R(6),
+                B(Mov), R(0), R(4),
+                B(Ldar), R(0),
+                B(JumpLoop), U8(19), I8(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(9), U8(7),
-                B(JumpIfFalse), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(7),
-                B(PopContext), R(2),
-                B(JumpLoop), U8(129), I8(0),
-                B(PopContext), R(1),
+  /*   60 E> */ B(TestEqual), R(6), U8(7),
+                B(JumpIfFalse), U8(4),
+                B(Jump), U8(5),
+                B(JumpLoop), U8(68), I8(0),
                 B(LdaUndefined),
-                B(Star), R(9),
+                B(Star), R(12),
                 B(LdaTrue),
+                B(Star), R(13),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(12), U8(2),
                 B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(9), U8(2),
-                B(Star), R(7),
                 B(LdaZero),
-                B(Star), R(6),
+                B(Star), R(9),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(6),
+                B(Star), R(9),
                 B(Jump), U8(8),
-                B(Star), R(7),
+                B(Star), R(10),
                 B(LdaSmi), I8(1),
-                B(Star), R(6),
+                B(Star), R(9),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(8),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(9), U8(1),
-                B(Ldar), R(8),
+                B(Star), R(11),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(3), U8(1),
+                B(Ldar), R(11),
                 B(SetPendingMessage),
-                B(Ldar), R(6),
-                B(SwitchOnSmiNoFeedback), U8(4), U8(2), I8(0),
+                B(Ldar), R(9),
+                B(SwitchOnSmiNoFeedback), U8(1), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(7),
+                B(Ldar), R(10),
   /*   62 S> */ B(Return),
-                B(Ldar), R(7),
+                B(Ldar), R(10),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   62 S> */ B(Return),
 ]
 constant pool: [
-  Smi [52],
-  FIXED_ARRAY_TYPE,
-  FIXED_ARRAY_TYPE,
-  FIXED_ARRAY_TYPE,
+  Smi [46],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [51, 288, 294],
+  [47, 204, 210],
 ]
 
 ---
@@ -446,218 +406,182 @@ snippet: "
   }
   f();
 "
-frame size: 13
+frame size: 16
 parameter count: 1
-bytecode array length: 432
+bytecode array length: 352
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(7),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(6),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(2), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(8),
+                B(CallRuntime), U16(Runtime::kAbort), R(8), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(4),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(6),
+                B(Mov), R(closure), R(8),
+                B(Mov), R(this), R(9),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(8), U8(2),
+                B(Star), R(2),
   /*   11 E> */ B(StackCheck),
-                B(Mov), R(context), R(7),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(8),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(9),
+                B(Mov), R(context), R(10),
                 B(LdaZero),
-  /*   11 E> */ B(SuspendGenerator), R(8), U8(0),
-                B(Ldar), R(9),
+                B(Mov), R(2), R(12),
+                B(Mov), R(2), R(11),
+  /*   11 E> */ B(SuspendGenerator), R(11), U8(0),
+                B(Ldar), R(12),
   /*   56 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(8), U8(1),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(8), U8(1),
-                B(Star), R(10),
+                B(Star), R(6),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(11), U8(1),
+                B(Star), R(12),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(11), U8(1),
+                B(Star), R(13),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(10),
+                B(TestEqualStrictNoFeedback), R(13),
                 B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(10),
+                B(TestEqualStrictNoFeedback), R(13),
                 B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(12),
-                B(Mov), R(9), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(11), U8(2),
-                B(Star), R(6),
+                B(Star), R(15),
+                B(Mov), R(12), R(14),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(14), U8(2),
+                B(Star), R(9),
                 B(LdaZero),
-                B(Star), R(5),
-                B(JumpConstant), U8(6),
-                B(Ldar), R(9),
+                B(Star), R(8),
+                B(Jump), U8(223),
+                B(Ldar), R(12),
   /*   11 E> */ B(Throw),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(2),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
   /*   31 S> */ B(LdaZero),
-  /*   31 E> */ B(StaCurrentContextSlot), U8(4),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-  /*   54 E> */ B(StaContextSlot), R(1), U8(5), U8(0),
+                B(Star), R(1),
+                B(Star), R(3),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(6), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(3), U8(1), I8(1),
+                B(Star), R(4),
+                B(Ldar), R(6),
+                B(SwitchOnSmiNoFeedback), U8(2), U8(1), I8(1),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   54 E> */ B(TestEqualStrictNoFeedback), R(6),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(8),
-                B(CallRuntime), U16(Runtime::kAbort), R(8), U8(1),
+                B(Star), R(11),
+                B(CallRuntime), U16(Runtime::kAbort), R(11), U8(1),
                 B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(4),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(8),
+                B(Mov), R(3), R(0),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(8), U8(3),
-                B(JumpIfFalse), U8(9),
+                B(TestEqual), R(4), U8(3),
+                B(JumpIfFalse), U8(7),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(6), U8(0),
+                B(Star), R(4),
                 B(Jump), U8(8),
-  /*   44 S> */ B(LdaCurrentContextSlot), U8(4),
+  /*   44 S> */ B(Ldar), R(0),
                 B(Inc), U8(4),
-  /*   44 E> */ B(StaCurrentContextSlot), U8(4),
+                B(Star), R(0),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(7), U8(0),
-  /*   36 S> */ B(LdaCurrentContextSlot), U8(4),
-                B(Star), R(8),
-                B(LdaSmi), I8(10),
-  /*   36 E> */ B(TestLessThan), R(8), U8(5),
+                B(Star), R(5),
+  /*   36 S> */ B(LdaSmi), I8(10),
+  /*   36 E> */ B(TestLessThan), R(0), U8(5),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(149),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(5), U8(1), I8(1),
+                B(Jump), U8(4),
+                B(Jump), U8(124),
+                B(Ldar), R(6),
+                B(SwitchOnSmiNoFeedback), U8(3), U8(1), I8(1),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+                B(TestEqualStrictNoFeedback), R(6),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(8),
-                B(CallRuntime), U16(Runtime::kAbort), R(8), U8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(8),
+                B(Star), R(11),
+                B(CallRuntime), U16(Runtime::kAbort), R(11), U8(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(8), U8(6),
-                B(JumpIfFalse), U8(93),
+                B(TestEqual), R(5), U8(6),
+                B(JumpIfFalse), U8(84),
   /*   18 E> */ B(StackCheck),
-  /*   47 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(4),
-                B(Star), R(9),
-                B(LdaFalse),
-                B(Star), R(10),
-  /*   53 E> */ B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(9), U8(2),
-                B(Star), R(9),
+  /*   47 S> */ B(LdaFalse),
+                B(Star), R(13),
+                B(Mov), R(0), R(12),
+  /*   53 E> */ B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(12), U8(2),
+                B(Star), R(12),
                 B(LdaSmi), I8(1),
-                B(SuspendGenerator), R(8), U8(0),
-                B(Ldar), R(9),
+                B(Mov), R(2), R(11),
+                B(SuspendGenerator), R(11), U8(0),
+                B(Ldar), R(12),
   /*   56 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(8), U8(1),
-                B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(8), U8(1),
-                B(Star), R(10),
+                B(Star), R(6),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(11), U8(1),
+                B(Star), R(12),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(11), U8(1),
+                B(Star), R(13),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(10),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(13),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(10),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(13),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(12),
-                B(Mov), R(9), R(11),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(11), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(15),
+                B(Mov), R(12), R(14),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(14), U8(2),
+                B(Star), R(9),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(72),
-                B(Ldar), R(9),
+                B(Star), R(8),
+                B(Jump), U8(57),
+                B(Ldar), R(12),
   /*   47 E> */ B(Throw),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(7), U8(0),
-                B(LdaCurrentContextSlot), U8(4),
-  /*   54 E> */ B(StaContextSlot), R(1), U8(5), U8(0),
-                B(JumpLoop), U8(122), I8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(8),
+                B(Star), R(5),
+                B(Mov), R(0), R(3),
+                B(Ldar), R(0),
+                B(JumpLoop), U8(107), I8(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(8), U8(7),
-                B(JumpIfFalse), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(7),
-                B(PopContext), R(2),
-                B(JumpLoop), U8(230), I8(0),
-                B(PopContext), R(1),
+  /*   54 E> */ B(TestEqual), R(5), U8(7),
+                B(JumpIfFalse), U8(4),
+                B(Jump), U8(5),
+                B(JumpLoop), U8(177), I8(0),
                 B(LdaUndefined),
-                B(Star), R(8),
+                B(Star), R(11),
                 B(LdaTrue),
+                B(Star), R(12),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(11), U8(2),
                 B(Star), R(9),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(8), U8(2),
-                B(Star), R(6),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(8),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(8),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(9),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
+                B(Star), R(8),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(8),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(8), U8(1),
-                B(Ldar), R(7),
+                B(Star), R(10),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorClose), R(2), U8(1),
+                B(Ldar), R(10),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(7), U8(2), I8(0),
+                B(Ldar), R(8),
+                B(SwitchOnSmiNoFeedback), U8(4), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(6),
+                B(Ldar), R(9),
   /*   56 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(9),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   56 S> */ B(Return),
 ]
 constant pool: [
-  Smi [52],
-  Smi [123],
-  FIXED_ARRAY_TYPE,
-  Smi [84],
-  FIXED_ARRAY_TYPE,
-  Smi [60],
-  Smi [293],
+  Smi [46],
+  Smi [102],
+  Smi [56],
+  Smi [50],
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [51, 389, 395],
+  [47, 313, 319],
 ]
 
 ---
@@ -667,162 +591,121 @@ snippet: "
   }
   f();
 "
-frame size: 12
+frame size: 17
 parameter count: 1
-bytecode array length: 298
+bytecode array length: 207
 bytecodes: [
-                B(CreateFunctionContext), U8(5),
-                B(PushContext), R(0),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(4),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(4), U8(1),
-                B(StaCurrentContextSlot), U8(8),
-                B(Mov), R(context), R(6),
-                B(Mov), R(context), R(7),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(0),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(9),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(9), U8(1),
+                B(Star), R(7),
+                B(Mov), R(context), R(11),
+                B(Mov), R(context), R(12),
   /*   36 S> */ B(LdaZero),
-  /*   36 E> */ B(StaCurrentContextSlot), U8(4),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-  /*   65 E> */ B(StaContextSlot), R(1), U8(5), U8(0),
+                B(Star), R(2),
+                B(Star), R(4),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(6), U8(0),
-                B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(1),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(8),
+                B(Star), R(5),
+  /*   65 E> */ B(StackCheck),
+                B(Mov), R(4), R(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(8), U8(3),
-                B(JumpIfFalse), U8(9),
+                B(TestEqual), R(5), U8(3),
+                B(JumpIfFalse), U8(7),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(6), U8(0),
+                B(Star), R(5),
                 B(Jump), U8(8),
-  /*   49 S> */ B(LdaCurrentContextSlot), U8(4),
+  /*   49 S> */ B(Ldar), R(1),
                 B(Inc), U8(4),
-  /*   49 E> */ B(StaCurrentContextSlot), U8(4),
+                B(Star), R(1),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(7), U8(0),
-  /*   41 S> */ B(LdaCurrentContextSlot), U8(4),
-                B(Star), R(8),
-                B(LdaSmi), I8(10),
-  /*   41 E> */ B(TestLessThan), R(8), U8(5),
+                B(Star), R(6),
+  /*   41 S> */ B(LdaSmi), I8(10),
+  /*   41 E> */ B(TestLessThan), R(1), U8(5),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(69),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(8),
+                B(Jump), U8(4),
+                B(Jump), U8(36),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(8), U8(6),
-                B(JumpIfFalse), U8(34),
+                B(TestEqual), R(6), U8(6),
+                B(JumpIfFalse), U8(17),
   /*   23 E> */ B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(2),
-                B(PushContext), R(3),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-  /*   62 S> */ B(LdaContextSlot), R(3), U8(4), U8(0),
-  /*   62 E> */ B(StaCurrentContextSlot), U8(4),
-                B(PopContext), R(3),
+  /*   62 S> */ B(Mov), R(1), R(0),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(7), U8(0),
-                B(LdaCurrentContextSlot), U8(4),
-  /*   65 E> */ B(StaContextSlot), R(1), U8(5), U8(0),
-                B(JumpLoop), U8(42), I8(1),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(Star), R(8),
+                B(Star), R(6),
+                B(Mov), R(0), R(4),
+                B(Ldar), R(0),
+                B(JumpLoop), U8(19), I8(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(8), U8(7),
-                B(JumpIfFalse), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(7),
-                B(PopContext), R(2),
-                B(JumpLoop), U8(129), I8(0),
-                B(PopContext), R(1),
+  /*   65 E> */ B(TestEqual), R(6), U8(7),
+                B(JumpIfFalse), U8(4),
+                B(Jump), U8(5),
+                B(JumpLoop), U8(68), I8(0),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(9),
+                B(Star), R(13),
                 B(LdaUndefined),
-                B(Star), R(10),
-                B(CallJSRuntime), U8(%promise_resolve), R(8), U8(3),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(5),
+                B(Star), R(15),
+                B(Mov), R(7), R(14),
+                B(CallJSRuntime), U8(%promise_resolve), R(13), U8(3),
                 B(LdaZero),
-                B(Star), R(4),
-                B(Jump), U8(65),
-                B(Jump), U8(51),
-                B(Star), R(8),
+                B(Star), R(9),
+                B(Mov), R(7), R(10),
+                B(Jump), U8(59),
+                B(Jump), U8(45),
+                B(Star), R(13),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(8), U8(3), U8(4),
-                B(Star), R(7),
+                B(CreateCatchContext), R(13), U8(0), U8(1),
+                B(Star), R(12),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(7),
-                B(PushContext), R(1),
+                B(Ldar), R(12),
+                B(PushContext), R(8),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(9),
+                B(Star), R(13),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(10),
+                B(Star), R(15),
                 B(LdaFalse),
-                B(Star), R(11),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(8), U8(4),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(5),
+                B(Star), R(16),
+                B(Mov), R(7), R(14),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(13), U8(4),
+                B(PopContext), R(8),
                 B(LdaZero),
-                B(Star), R(4),
+                B(Star), R(9),
+                B(Mov), R(7), R(10),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(4),
+                B(Star), R(9),
                 B(Jump), U8(8),
-                B(Star), R(5),
+                B(Star), R(10),
                 B(LdaSmi), I8(1),
-                B(Star), R(4),
+                B(Star), R(9),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(6),
+                B(Star), R(11),
                 B(LdaUndefined),
-                B(Star), R(7),
-                B(LdaCurrentContextSlot), U8(8),
-                B(Star), R(8),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(7), U8(2),
-                B(Ldar), R(6),
+                B(Star), R(12),
+                B(Mov), R(7), R(13),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(12), U8(2),
+                B(Ldar), R(11),
                 B(SetPendingMessage),
-                B(Ldar), R(4),
-                B(SwitchOnSmiNoFeedback), U8(5), U8(2), I8(0),
+                B(Ldar), R(9),
+                B(SwitchOnSmiNoFeedback), U8(2), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(5),
+                B(Ldar), R(10),
   /*   67 S> */ B(Return),
-                B(Ldar), R(5),
+                B(Ldar), R(10),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   67 S> */ B(Return),
 ]
 constant pool: [
-  FIXED_ARRAY_TYPE,
-  FIXED_ARRAY_TYPE,
-  FIXED_ARRAY_TYPE,
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [17, 252, 258],
-  [20, 201, 203],
+  [13, 162, 168],
+  [16, 117, 119],
 ]
 
 ---
@@ -832,229 +715,190 @@ snippet: "
   }
   f();
 "
-frame size: 14
+frame size: 20
 parameter count: 1
-bytecode array length: 465
+bytecode array length: 369
 bytecodes: [
                 B(Ldar), R(new_target),
                 B(JumpIfUndefined), U8(25),
                 B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetContext), R(new_target), U8(1),
-                B(PushContext), R(4),
+                B(PushContext), R(10),
                 B(ResumeGenerator), R(new_target),
-                B(Star), R(3),
+                B(Star), R(9),
                 B(SwitchOnSmiNoFeedback), U8(0), U8(1), I8(0),
                 B(LdaSmi), I8(79),
-                B(Star), R(5),
-                B(CallRuntime), U16(Runtime::kAbort), R(5), U8(1),
+                B(Star), R(11),
+                B(CallRuntime), U16(Runtime::kAbort), R(11), U8(1),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(CreateFunctionContext), U8(6),
-                B(PushContext), R(0),
-                B(Mov), R(closure), R(5),
-                B(Mov), R(this), R(6),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(5), U8(2),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(9),
+                B(Mov), R(closure), R(11),
+                B(Mov), R(this), R(12),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateJSGeneratorObject), R(11), U8(2),
+                B(Star), R(2),
   /*   16 E> */ B(StackCheck),
                 B(LdaUndefined),
-                B(Star), R(5),
-                B(CallJSRuntime), U8(%async_function_promise_create), R(5), U8(1),
-                B(StaCurrentContextSlot), U8(6),
-                B(Mov), R(context), R(7),
-                B(Mov), R(context), R(8),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(1),
-                B(PushContext), R(1),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
+                B(Star), R(11),
+                B(CallJSRuntime), U8(%async_function_promise_create), R(11), U8(1),
+                B(Star), R(4),
+                B(Mov), R(context), R(13),
+                B(Mov), R(context), R(14),
   /*   36 S> */ B(LdaZero),
-  /*   36 E> */ B(StaCurrentContextSlot), U8(4),
-                B(LdaImmutableCurrentContextSlot), U8(4),
-  /*   59 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
+                B(Star), R(1),
+                B(Star), R(5),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(8), U8(0),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(2), U8(1), I8(0),
+                B(Star), R(6),
+                B(Ldar), R(9),
+                B(SwitchOnSmiNoFeedback), U8(1), U8(1), I8(0),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+  /*   59 E> */ B(TestEqualStrictNoFeedback), R(9),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(9),
-                B(CallRuntime), U16(Runtime::kAbort), R(9), U8(1),
+                B(Star), R(15),
+                B(CallRuntime), U16(Runtime::kAbort), R(15), U8(1),
                 B(StackCheck),
-                B(Ldar), R(closure),
-                B(CreateBlockContext), U8(3),
-                B(PushContext), R(2),
-                B(LdaTheHole),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(7), U8(0),
-                B(StaCurrentContextSlot), U8(4),
-                B(LdaContextSlot), R(1), U8(8), U8(0),
-                B(Star), R(9),
+                B(Mov), R(5), R(0),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(9), U8(3),
-                B(JumpIfFalse), U8(9),
+                B(TestEqual), R(6), U8(3),
+                B(JumpIfFalse), U8(7),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(8), U8(0),
+                B(Star), R(6),
                 B(Jump), U8(8),
-  /*   49 S> */ B(LdaCurrentContextSlot), U8(4),
+  /*   49 S> */ B(Ldar), R(0),
                 B(Inc), U8(4),
-  /*   49 E> */ B(StaCurrentContextSlot), U8(4),
+                B(Star), R(0),
                 B(LdaSmi), I8(1),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-  /*   41 S> */ B(LdaCurrentContextSlot), U8(4),
-                B(Star), R(9),
-                B(LdaSmi), I8(10),
-  /*   41 E> */ B(TestLessThan), R(9), U8(5),
+                B(Star), R(7),
+  /*   41 S> */ B(LdaSmi), I8(10),
+  /*   41 E> */ B(TestLessThan), R(0), U8(5),
                 B(JumpIfFalse), U8(4),
-                B(Jump), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(172),
-                B(Ldar), R(3),
-                B(SwitchOnSmiNoFeedback), U8(4), U8(1), I8(0),
+                B(Jump), U8(4),
+                B(Jump), U8(134),
+                B(Ldar), R(9),
+                B(SwitchOnSmiNoFeedback), U8(2), U8(1), I8(0),
                 B(LdaSmi), I8(-2),
-                B(TestEqualStrictNoFeedback), R(3),
+                B(TestEqualStrictNoFeedback), R(9),
                 B(JumpIfTrue), U8(11),
                 B(LdaSmi), I8(79),
-                B(Star), R(9),
-                B(CallRuntime), U16(Runtime::kAbort), R(9), U8(1),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(9),
+                B(Star), R(15),
+                B(CallRuntime), U16(Runtime::kAbort), R(15), U8(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(9), U8(6),
-                B(JumpIfFalse), U8(116),
+                B(TestEqual), R(7), U8(6),
+                B(JumpIfFalse), U8(94),
   /*   23 E> */ B(StackCheck),
-  /*   52 S> */ B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(9),
-  /*   58 S> */ B(LdaCurrentContextSlot), U8(4),
-                B(StaContextSlot), R(1), U8(5), U8(0),
+  /*   52 S> */ B(Nop),
+  /*   58 S> */ B(Mov), R(0), R(3),
   /*   52 S> */ B(LdaUndefined),
-                B(Star), R(10),
-                B(LdaImmutableContextSlot), R(1), U8(4), U8(0),
-                B(Star), R(11),
-                B(LdaContextSlot), R(1), U8(5), U8(0),
-                B(Star), R(12),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(13),
-                B(CallJSRuntime), U8(%async_function_await_uncaught), R(10), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(10),
+                B(Star), R(16),
+                B(Mov), R(2), R(17),
+                B(Mov), R(0), R(18),
+                B(Mov), R(4), R(19),
+                B(CallJSRuntime), U8(%async_function_await_uncaught), R(16), U8(4),
                 B(LdaZero),
-                B(SuspendGenerator), R(9), U8(2),
-                B(Ldar), R(10),
+                B(Mov), R(2), R(15),
+                B(Mov), R(4), R(16),
+                B(SuspendGenerator), R(15), U8(2),
+                B(Ldar), R(16),
   /*   61 S> */ B(Return),
                 B(LdaSmi), I8(-2),
-                B(Star), R(3),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(9), U8(1),
-                B(Star), R(10),
-                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(9), U8(1),
-                B(Star), R(11),
+                B(Star), R(9),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetInputOrDebugPos), R(15), U8(1),
+                B(Star), R(16),
+                B(InvokeIntrinsic), U8(Runtime::k_GeneratorGetResumeMode), R(15), U8(1),
+                B(Star), R(17),
                 B(LdaZero),
-                B(TestEqualStrictNoFeedback), R(11),
-                B(JumpIfTrue), U8(30),
+                B(TestEqualStrictNoFeedback), R(17),
+                B(JumpIfTrue), U8(28),
                 B(LdaSmi), I8(2),
-                B(TestEqualStrictNoFeedback), R(11),
-                B(JumpIfTrue), U8(21),
+                B(TestEqualStrictNoFeedback), R(17),
+                B(JumpIfTrue), U8(19),
                 B(LdaTrue),
-                B(Star), R(13),
-                B(Mov), R(10), R(12),
-                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(12), U8(2),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(19),
+                B(Mov), R(16), R(18),
+                B(InvokeIntrinsic), U8(Runtime::k_CreateIterResultObject), R(18), U8(2),
+                B(Star), R(12),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(129),
-                B(Ldar), R(10),
+                B(Star), R(11),
+                B(Jump), U8(106),
+                B(Ldar), R(16),
                 B(ReThrow),
                 B(LdaZero),
-                B(StaContextSlot), R(1), U8(9), U8(0),
-                B(LdaCurrentContextSlot), U8(4),
-  /*   59 E> */ B(StaContextSlot), R(1), U8(7), U8(0),
-                B(JumpLoop), U8(145), I8(1),
-                B(LdaContextSlot), R(1), U8(9), U8(0),
-                B(Star), R(9),
+                B(Star), R(7),
+                B(Mov), R(0), R(5),
+                B(Ldar), R(0),
+                B(JumpLoop), U8(117), I8(1),
                 B(LdaSmi), I8(1),
-                B(TestEqual), R(9), U8(7),
-                B(JumpIfFalse), U8(6),
-                B(PopContext), R(2),
-                B(Jump), U8(7),
-                B(PopContext), R(2),
-                B(JumpLoop), U8(253), I8(0),
-                B(PopContext), R(1),
+  /*   59 E> */ B(TestEqual), R(7), U8(7),
+                B(JumpIfFalse), U8(4),
+                B(Jump), U8(5),
+                B(JumpLoop), U8(187), I8(0),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(10),
+                B(Star), R(15),
                 B(LdaUndefined),
-                B(Star), R(11),
-                B(CallJSRuntime), U8(%promise_resolve), R(9), U8(3),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(6),
+                B(Star), R(17),
+                B(Mov), R(4), R(16),
+                B(CallJSRuntime), U8(%promise_resolve), R(15), U8(3),
                 B(LdaZero),
-                B(Star), R(5),
-                B(Jump), U8(65),
-                B(Jump), U8(51),
-                B(Star), R(9),
+                B(Star), R(11),
+                B(Mov), R(4), R(12),
+                B(Jump), U8(59),
+                B(Jump), U8(45),
+                B(Star), R(15),
                 B(Ldar), R(closure),
-                B(CreateCatchContext), R(9), U8(5), U8(6),
-                B(Star), R(8),
+                B(CreateCatchContext), R(15), U8(3), U8(4),
+                B(Star), R(14),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Ldar), R(8),
-                B(PushContext), R(1),
+                B(Ldar), R(14),
+                B(PushContext), R(8),
                 B(LdaUndefined),
-                B(Star), R(9),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(Star), R(10),
+                B(Star), R(15),
                 B(LdaImmutableCurrentContextSlot), U8(4),
-                B(Star), R(11),
+                B(Star), R(17),
                 B(LdaFalse),
-                B(Star), R(12),
-                B(CallJSRuntime), U8(%promise_internal_reject), R(9), U8(4),
-                B(LdaContextSlot), R(1), U8(6), U8(0),
-                B(PopContext), R(1),
-                B(Star), R(6),
+                B(Star), R(18),
+                B(Mov), R(4), R(16),
+                B(CallJSRuntime), U8(%promise_internal_reject), R(15), U8(4),
+                B(PopContext), R(8),
                 B(LdaZero),
-                B(Star), R(5),
+                B(Star), R(11),
+                B(Mov), R(4), R(12),
                 B(Jump), U8(14),
                 B(LdaSmi), I8(-1),
-                B(Star), R(5),
+                B(Star), R(11),
                 B(Jump), U8(8),
-                B(Star), R(6),
+                B(Star), R(12),
                 B(LdaSmi), I8(1),
-                B(Star), R(5),
+                B(Star), R(11),
                 B(LdaTheHole),
                 B(SetPendingMessage),
-                B(Star), R(7),
+                B(Star), R(13),
                 B(LdaUndefined),
-                B(Star), R(8),
-                B(LdaCurrentContextSlot), U8(6),
-                B(Star), R(9),
-                B(CallJSRuntime), U8(%async_function_promise_release), R(8), U8(2),
-                B(Ldar), R(7),
+                B(Star), R(14),
+                B(Mov), R(4), R(15),
+                B(CallJSRuntime), U8(%async_function_promise_release), R(14), U8(2),
+                B(Ldar), R(13),
                 B(SetPendingMessage),
-                B(Ldar), R(5),
-                B(SwitchOnSmiNoFeedback), U8(7), U8(2), I8(0),
+                B(Ldar), R(11),
+                B(SwitchOnSmiNoFeedback), U8(5), U8(2), I8(0),
                 B(Jump), U8(8),
-                B(Ldar), R(6),
+                B(Ldar), R(12),
   /*   61 S> */ B(Return),
-                B(Ldar), R(6),
+                B(Ldar), R(12),
                 B(ReThrow),
                 B(LdaUndefined),
   /*   61 S> */ B(Return),
 ]
 constant pool: [
-  Smi [73],
-  FIXED_ARRAY_TYPE,
-  Smi [84],
-  FIXED_ARRAY_TYPE,
-  Smi [83],
+  Smi [54],
+  Smi [56],
+  Smi [60],
   ONE_BYTE_INTERNALIZED_STRING_TYPE [".catch"],
   FIXED_ARRAY_TYPE,
   Smi [6],
   Smi [9],
 ]
 handlers: [
-  [60, 419, 425],
-  [63, 368, 370],
+  [56, 324, 330],
+  [59, 279, 281],
 ]
 

test/debugger/debug/debug-scopes-suspended-generators.js

@@ -107,7 +107,7 @@ function *gen1() {
 }
 
 var g = gen1();
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({}, 0, g);
@@ -120,7 +120,7 @@ function *gen2(a) {
 }
 
 g = gen2(42);
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({a: 42}, 0, g);
@@ -134,7 +134,7 @@ function *gen3(a) {
 }
 
 g = gen3(0);
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({a: 0, b: undefined}, 0, g);
@@ -148,11 +148,12 @@ function *gen4(a, b) {
   var x = 2;
   yield a;
   var y = 3;
+  yield a;
   return b;
 }
 
 g = gen4(0, 1);
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({a: 0, b: 1, x: undefined, y: undefined}, 0, g);
@@ -167,12 +168,13 @@ CheckScopeContent({a: 0, b: 1, x: 2, y: 3}, 0, g);
 
 function *gen5(a) {
   eval('var b = 2');
+  yield a;
   return b;
 }
 
 g = gen5(1);
 g.next();
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({a: 1, b: 2}, 0, g);
@@ -190,13 +192,13 @@ function *gen6() {
 g = gen6();
 g.next();
 CheckScopeChain([debug.ScopeType.With,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({}, 0, g);
 
 g.next();
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 
@@ -216,7 +218,7 @@ g = gen7();
 g.next();
 CheckScopeChain([debug.ScopeType.With,
                  debug.ScopeType.With,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({}, 0, g);
@@ -237,7 +239,7 @@ g = gen8();
 g.next();
 CheckScopeChain([debug.ScopeType.With,
                  debug.ScopeType.With,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({a: 2, b: 1}, 0, g);
@@ -259,7 +261,7 @@ function *gen9() {
 g = gen9();
 g.next();
 CheckScopeChain([debug.ScopeType.Catch,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({e: 42}, 0, g);
@@ -274,24 +276,23 @@ function *gen10() {
 g = gen10();
 g.next();
 CheckScopeChain([debug.ScopeType.Block,
-                 debug.ScopeType.Block,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({i: 0}, 0, g);
 
 g.next();
 CheckScopeContent({i: 1}, 0, g);
-CheckScopeContent({i: 0}, 1, g);  // Additional block scope with i = 0;
 
 // Nested generators.
 
 var gen12;
 function *gen11() {
+  var b = 2;
   gen12 = function*() {
     var a = 1;
     yield 1;
-    return 2;
+    return b;
   }();
 
   var a = 0;
@@ -301,12 +302,12 @@ function *gen11() {
 gen11().next();
 g = gen12;
 
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Closure,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({a: 1}, 0, g);
-CheckScopeContent({a: 0}, 1, g);
+CheckScopeContent({b: 2}, 1, g);
 
 // Set a variable in an empty scope.
 
@@ -355,7 +356,7 @@ var g = gen15();
 assertEquals(1, g.next().value);
 
 CheckScopeChain([debug.ScopeType.With,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({a: 1, b: 2}, 0, g);
@@ -376,7 +377,7 @@ CheckScopeContent({a: 1, b: 2}, 0, g);
 CheckScopeContent({c: 1, d: 4, e: 42}, 1, g);
 assertEquals(5, g.next().value);  // Initialized after set.
 
-CheckScopeChain([debug.ScopeType.Closure,
+CheckScopeChain([debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 
@@ -404,15 +405,15 @@ g.next();
 
 CheckScopeChain([debug.ScopeType.Block,
                  debug.ScopeType.With,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
-CheckScopeContent({d: 4}, 0, g);
+CheckScopeContent({d: 4, e: undefined}, 0, g);
 CheckScopeContent({a: 1, b: 2}, 1, g);
 CheckScopeContent({c: 3}, 2, g);
 
 Debug.generatorScope(g, 0).setVariableValue("d", 1);
-CheckScopeContent({d: 1}, 0, g);
+CheckScopeContent({d: 1, e: undefined}, 0, g);
 
 assertEquals(1, g.next().value);
 
@@ -434,7 +435,7 @@ g = gen17();
 g.next();
 
 CheckScopeChain([debug.ScopeType.Catch,
-                 debug.ScopeType.Closure,
+                 debug.ScopeType.Local,
                  debug.ScopeType.Script,
                  debug.ScopeType.Global], g);
 CheckScopeContent({e: 42}, 0, g);

test/debugger/debug/es8/async-function-debug-evaluate.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --noalways-opt
+
 var Debug = debug.Debug;
 var breakPointCount = 0;
 
@@ -12,10 +14,9 @@ function listener(event, exec_state, event_data, data) {
     if (breakPointCount === 1) {
       assertEquals(
           "inner", exec_state.frame(0).evaluate("inner").value());
-      assertThrows(() => exec_state.frame(0).evaluate("letInner").value(),
-                   ReferenceError);
-      assertThrows(() => exec_state.frame(0).evaluate("constInner").value(),
-                   ReferenceError);
+      // Variables in TDZ have 'undefined' as their values.
+      assertEquals(undefined, exec_state.frame(0).evaluate("letInner").value());
+      assertEquals(undefined, exec_state.frame(0).evaluate("constInner").value());
 
       assertEquals("outer", exec_state.frame(0).evaluate("outer").value());
       assertEquals(
@@ -29,16 +30,15 @@ function listener(event, exec_state, event_data, data) {
       assertEquals(
           "let outer", exec_state.frame(1).evaluate("letOuter").value());
 
-      assertThrows(() => exec_state.frame(0).evaluate("withVar").value(),
-                   ReferenceError);
+      // Variables in TDZ have 'undefined' as their values.
+      assertEquals(undefined, exec_state.frame(0).evaluate("withVar").value());
 
     } else if (breakPointCount === 2) {
       assertEquals(
           "inner", exec_state.frame(0).evaluate("inner").value());
-      assertThrows(() => exec_state.frame(0).evaluate("letInner").value(),
-                   ReferenceError);
-      assertThrows(() => exec_state.frame(0).evaluate("constInner").value(),
-                   ReferenceError);
+      // Variables in TDZ have 'undefined' as their values.
+      assertEquals(undefined, exec_state.frame(0).evaluate("letInner").value());
+      assertEquals(undefined, exec_state.frame(0).evaluate("constInner").value());
 
       assertEquals(57, exec_state.frame(0).evaluate("x").value());
       assertEquals(100, exec_state.frame(0).evaluate("y").value());
@@ -70,8 +70,8 @@ function listener(event, exec_state, event_data, data) {
           "Error",
           exec_state.frame(0).evaluate("error.constructor.name").value());
       assertEquals("floof", exec_state.frame(0).evaluate("bun").value());
-      assertThrows(() => exec_state.frame(0).evaluate("cow").value(),
-                   ReferenceError);
+      // Variables in TDZ have 'undefined' as their values.
+      assertEquals(undefined, exec_state.frame(0).evaluate("cow").value())
 
       assertEquals("outer", exec_state.frame(0).evaluate("outer").value());
       assertEquals(

test/debugger/debug/es8/async-function-debug-scopes.js

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --noalways-opt
+
 var Debug = debug.Debug;
 var global_marker = 7;
 
@@ -400,7 +402,7 @@ await test(
                        debug.ScopeType.Closure,
                        debug.ScopeType.Script,
                        debug.ScopeType.Global], exec_state);
-      CheckScopeContent({a:1, x: 2}, 1, exec_state);
+      CheckScopeContent({a:1}, 1, exec_state);
     },
     result => result());
 
@@ -418,7 +420,7 @@ await test(
                        debug.ScopeType.Script,
                        debug.ScopeType.Global], exec_state);
       CheckScopeContent({e: 'Exception'}, 0, exec_state);
-      CheckScopeContent({a:1, x: 2}, 2, exec_state);
+      CheckScopeContent({a:1}, 2, exec_state);
     },
     result => result());
 

test/debugger/debug/regress-3225.js

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --noalways-opt
 
 Debug = debug.Debug
 

test/inspector/debugger/suspended-generator-scopes-expected.txt

@@ -9,11 +9,11 @@ Running test: testScopesPaused
                 configurable : true
                 enumerable : true
                 isOwn : true
-                name : a
+                name : b
                 value : {
-                    description : 420
+                    description : 42
                     type : number
-                    value : 420
+                    value : 42
                 }
                 writable : true
             }
@@ -21,11 +21,11 @@ Running test: testScopesPaused
                 configurable : true
                 enumerable : true
                 isOwn : true
-                name : b
+                name : a
                 value : {
-                    description : 42
+                    description : 420
                     type : number
-                    value : 42
+                    value : 420
                 }
                 writable : true
             }
@@ -42,11 +42,9 @@ Running test: testScopesNonPaused
                 configurable : true
                 enumerable : true
                 isOwn : true
-                name : a
+                name : b
                 value : {
-                    description : 430
-                    type : number
-                    value : 430
+                    type : undefined
                 }
                 writable : true
             }
@@ -54,9 +52,11 @@ Running test: testScopesNonPaused
                 configurable : true
                 enumerable : true
                 isOwn : true
-                name : b
+                name : a
                 value : {
-                    type : undefined
+                    description : 430
+                    type : number
+                    value : 430
                 }
                 writable : true
             }

test/inspector/runtime/internal-properties-expected.txt

@@ -339,16 +339,6 @@ expression: gen1.next();gen1
                     }
                 }
             }
-            [4] : {
-                name : [[Scopes]]
-                value : {
-                    className : Array
-                    description : Scopes[2]
-                    objectId : <objectId>
-                    subtype : internal#scopeList
-                    type : object
-                }
-            }
         ]
     }
 }