[generators] Replace some runtime functions with Turbofan JS operators.

src/compiler/access-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/access-builder.h"
 
 #include "src/contexts.h"
 #include "src/frames.h"
 #include "src/handles-inl.h"
 #include "src/heap/heap.h"
@@ skipping 112 matching lines @@
   FieldAccess access = {kTaggedBase,
                         JSFunction::kNextFunctionLinkOffset,
                         Handle<Name>(),
                         Type::Any(),
                         MachineType::AnyTagged(),
                         kPointerWriteBarrier};
   return access;
 }
 
 // static
+FieldAccess AccessBuilder::ForJSGeneratorObjectContext() {
+  FieldAccess access = {kTaggedBase,
+                        JSGeneratorObject::kContextOffset,
+                        Handle<Name>(),
+                        Type::Internal(),
+                        MachineType::AnyTagged(),
+                        kPointerWriteBarrier};
+  return access;
+}
+
+// static
+FieldAccess AccessBuilder::ForJSGeneratorObjectContinuation() {
+  TypeCache const& type_cache = TypeCache::Get();
+  FieldAccess access = {kTaggedBase,
+                        JSGeneratorObject::kContinuationOffset,
+                        Handle<Name>(),
+                        type_cache.kSmi,
+                        MachineType::AnyTagged(),
+                        kNoWriteBarrier};
+  return access;
+}
+
+// static
+FieldAccess AccessBuilder::ForJSGeneratorObjectOperandStack() {
+  FieldAccess access = {kTaggedBase,
+                        JSGeneratorObject::kOperandStackOffset,
+                        Handle<Name>(),
+                        Type::Internal(),
+                        MachineType::AnyTagged(),
+                        kPointerWriteBarrier};
+  return access;
+}
+
+// static
 FieldAccess AccessBuilder::ForJSArrayLength(ElementsKind elements_kind) {
   TypeCache const& type_cache = TypeCache::Get();
   FieldAccess access = {kTaggedBase,
                         JSArray::kLengthOffset,
                         Handle<Name>(),
                         type_cache.kJSArrayLengthType,
                         MachineType::AnyTagged(),
                         kFullWriteBarrier};
   if (IsFastDoubleElementsKind(elements_kind)) {
     access.type = type_cache.kFixedDoubleArrayLengthType;
@@ skipping 356 matching lines @@
   }
   UNREACHABLE();
   ElementAccess access = {kUntaggedBase, 0, Type::None(), MachineType::None(),
                           kNoWriteBarrier};
   return access;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8