Test StringLengthStub generation via TurboFan.

src/code-stubs.h

 // Copyright 2012 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.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 991 matching lines @@
   Code::Kind kind() const OVERRIDE { return Code::LOAD_IC; }
   Code::StubType GetStubType() const OVERRIDE { return Code::FAST; }
 
  private:
   class ConstantIndexBits : public BitField<int, 0, kSubMinorKeyBits> {};
 
   DEFINE_HANDLER_CODE_STUB(LoadConstant, HandlerStub);
 };
 
 
-class StringLengthStub: public HandlerStub {
+class StringLengthStub : public CodeStub {
  public:
-  explicit StringLengthStub(Isolate* isolate) : HandlerStub(isolate) {}
+  explicit StringLengthStub(Isolate* isolate) : CodeStub(isolate) {}
 
- protected:
-  Code::Kind kind() const OVERRIDE { return Code::LOAD_IC; }
-  Code::StubType GetStubType() const OVERRIDE { return Code::FAST; }
+  StringLengthStub(uint32_t key, Isolate* isolate) : CodeStub(key, isolate) {}
 
-  DEFINE_HANDLER_CODE_STUB(StringLength, HandlerStub);
+  CallInterfaceDescriptor GetCallInterfaceDescriptor() OVERRIDE {
+    return LoadDescriptor(isolate());
+  };
+
+  Handle<Code> GenerateCode() OVERRIDE;
+
+  Major MajorKey() const OVERRIDE { return StringLength; };
+  Code::Kind GetCodeKind() const OVERRIDE { return Code::HANDLER; }
+  InlineCacheState GetICState() const OVERRIDE { return MONOMORPHIC; }
+  ExtraICState GetExtraICState() const OVERRIDE { return Code::LOAD_IC; }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StringLengthStub);
 };
 
 
 class StoreFieldStub : public HandlerStub {
  public:
   StoreFieldStub(Isolate* isolate, FieldIndex index,
                  Representation representation)
       : HandlerStub(isolate) {
     int property_index_key = index.GetFieldAccessStubKey();
     uint8_t repr = PropertyDetails::EncodeRepresentation(representation);
@@ skipping 1701 matching lines @@
 
 #undef DEFINE_CALL_INTERFACE_DESCRIPTOR
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_