[builtins] FastNewFunctionContextStub becomes a builtin

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 84 matching lines @@
   V(DivideWithFeedback)                       \
   V(ModulusWithFeedback)                      \
   V(Inc)                                      \
   V(InternalArrayNoArgumentConstructor)       \
   V(InternalArraySingleArgumentConstructor)   \
   V(Dec)                                      \
   V(ElementsTransitionAndStore)               \
   V(FastCloneRegExp)                          \
   V(FastCloneShallowArray)                    \
   V(FastCloneShallowObject)                   \
-  V(FastNewFunctionContext)                   \
   V(KeyedLoadSloppyArguments)                 \
   V(KeyedStoreSloppyArguments)                \
   V(LoadScriptContextField)                   \
   V(StoreScriptContextField)                  \
   V(NumberToString)                           \
   V(StringAdd)                                \
   V(GetProperty)                              \
   V(LoadIC)                                   \
   V(LoadICProtoArray)                         \
   V(KeyedLoadICTF)                            \
@@ skipping 664 matching lines @@
 };
 
 class NumberToStringStub final : public TurboFanCodeStub {
  public:
   explicit NumberToStringStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(TypeConversion);
   DEFINE_TURBOFAN_CODE_STUB(NumberToString, TurboFanCodeStub);
 };
 
-class FastNewFunctionContextStub final : public TurboFanCodeStub {
- public:
-  static int MaximumSlots();
-
-  explicit FastNewFunctionContextStub(Isolate* isolate, ScopeType scope_type)
-      : TurboFanCodeStub(isolate) {
-    minor_key_ = ScopeTypeBits::encode(scope_type);
-  }
-
-  static compiler::Node* Generate(CodeStubAssembler* assembler,
-                                  compiler::Node* function,
-                                  compiler::Node* slots,
-                                  compiler::Node* context,
-                                  ScopeType scope_type);
-
-  ScopeType scope_type() const {
-    return static_cast<ScopeType>(ScopeTypeBits::decode(minor_key_));
-  }
-
- private:
-  static const int kMaximumSlots = 0x8000;
-  static const int kSmallMaximumSlots = 10;
-
-  // FastNewFunctionContextStub can only allocate closures which fit in the
-  // new space.
-  STATIC_ASSERT(((kMaximumSlots + Context::MIN_CONTEXT_SLOTS) * kPointerSize +
-                 FixedArray::kHeaderSize) < kMaxRegularHeapObjectSize);
-
-  class ScopeTypeBits : public BitField<bool, 0, 8> {};
-
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewFunctionContext);
-  DEFINE_TURBOFAN_CODE_STUB(FastNewFunctionContext, TurboFanCodeStub);
-};
-
 class FastNewObjectStub final : public PlatformCodeStub {
  public:
   explicit FastNewObjectStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewObject);
   DEFINE_PLATFORM_CODE_STUB(FastNewObject, PlatformCodeStub);
 };
 
 
 // TODO(turbofan): This stub should be possible to write in TurboFan
@@ skipping 1639 matching lines @@
 #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 internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_