[runtime] Turn ArgumentAccessStub into FastNewSloppyArgumentsStub.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 8d270d4fca6849f70373753676e69ea9ad6431ee..2fa97bad90f567f18dc2984a490f6fb6ace1d7ff 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -21,7 +21,6 @@ namespace internal {
 // List of code stubs used on all platforms.
 #define CODE_STUB_LIST_ALL_PLATFORMS(V)     \
   /* PlatformCodeStubs */                   \
-  V(ArgumentsAccess)                        \
   V(ArrayConstructor)                       \
   V(BinaryOpICWithAllocationSite)           \
   V(CallApiFunction)                        \
@@ -78,7 +77,8 @@ namespace internal {
   V(FastNewClosure)                         \
   V(FastNewContext)                         \
   V(FastNewRestParameter)                   \
-  V(FastNewStrictArguments)               \
+  V(FastNewSloppyArguments)                 \
+  V(FastNewStrictArguments)                 \
   V(GrowArrayElements)                      \
   V(InternalArrayNArgumentsConstructor)     \
   V(InternalArrayNoArgumentConstructor)     \
@@ -742,8 +742,20 @@ class FastNewRestParameterStub final : public PlatformCodeStub {
 
 // TODO(turbofan): This stub should be possible to write in TurboFan
 // using the CodeStubAssembler very soon in a way that is as efficient
-// and easy as the current handwritten version, which is partly a copy
-// of the strict arguments object materialization code.
+// and easy as the current handwritten version.
+class FastNewSloppyArgumentsStub final : public PlatformCodeStub {
+ public:
+  explicit FastNewSloppyArgumentsStub(Isolate* isolate)
+      : PlatformCodeStub(isolate) {}
+
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewSloppyArguments);
+  DEFINE_PLATFORM_CODE_STUB(FastNewSloppyArguments, PlatformCodeStub);
+};
+
+
+// TODO(turbofan): This stub should be possible to write in TurboFan
+// using the CodeStubAssembler very soon in a way that is as efficient
+// and easy as the current handwritten version.
 class FastNewStrictArgumentsStub final : public PlatformCodeStub {
  public:
   explicit FastNewStrictArgumentsStub(Isolate* isolate)
@@ -1840,43 +1852,6 @@ class JSEntryStub : public PlatformCodeStub {
 };
 
 
-class ArgumentsAccessStub: public PlatformCodeStub {
- public:
-  enum Type {
-    NEW_SLOPPY_FAST,
-    NEW_SLOPPY_SLOW,
-  };
-
-  ArgumentsAccessStub(Isolate* isolate, Type type) : PlatformCodeStub(isolate) {
-    minor_key_ = TypeBits::encode(type);
-  }
-
-  CallInterfaceDescriptor GetCallInterfaceDescriptor() const override {
-    return ArgumentsAccessNewDescriptor(isolate());
-  }
-
-  static Type ComputeType(bool has_duplicate_parameters) {
-    if (has_duplicate_parameters) {
-      return Type::NEW_SLOPPY_SLOW;
-    } else {
-      return Type::NEW_SLOPPY_FAST;
-    }
-  }
-
- private:
-  Type type() const { return TypeBits::decode(minor_key_); }
-
-  void GenerateNewSloppyFast(MacroAssembler* masm);
-  void GenerateNewSloppySlow(MacroAssembler* masm);
-
-  void PrintName(std::ostream& os) const override;  // NOLINT
-
-  class TypeBits : public BitField<Type, 0, 1> {};
-
-  DEFINE_PLATFORM_CODE_STUB(ArgumentsAccess, PlatformCodeStub);
-};
-
-
 class RegExpExecStub: public PlatformCodeStub {
  public:
   explicit RegExpExecStub(Isolate* isolate) : PlatformCodeStub(isolate) { }