[stubs]: Convert FastNewContext stub to 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/code-stub-assembler.h"
@@ skipping 45 matching lines @@
   /* HydrogenCodeStubs */                   \
   V(BinaryOpIC)                             \
   V(BinaryOpWithAllocationSite)             \
   V(CreateAllocationSite)                   \
   V(CreateWeakCell)                         \
   V(ElementsTransitionAndStore)             \
   V(FastArrayPush)                          \
   V(FastCloneRegExp)                        \
   V(FastCloneShallowArray)                  \
   V(FastFunctionBind)                       \
-  V(FastNewContext)                         \
   V(FastNewObject)                          \
   V(FastNewRestParameter)                   \
   V(FastNewSloppyArguments)                 \
   V(FastNewStrictArguments)                 \
   V(GrowArrayElements)                      \
   V(KeyedLoadGeneric)                       \
   V(LoadScriptContextField)                 \
   V(LoadDictionaryElement)                  \
   V(NameDictionaryLookup)                   \
   V(NumberToString)                         \
@@ skipping 34 matching lines @@
   V(ShiftLeft)                              \
   V(BitwiseAnd)                             \
   V(BitwiseOr)                              \
   V(BitwiseXor)                             \
   V(Inc)                                    \
   V(InternalArrayNoArgumentConstructor)     \
   V(InternalArraySingleArgumentConstructor) \
   V(Dec)                                    \
   V(FastCloneShallowObject)                 \
   V(FastNewClosure)                         \
+  V(FastNewFunctionContext)                 \
   V(InstanceOf)                             \
   V(LessThan)                               \
   V(LessThanOrEqual)                        \
   V(GreaterThan)                            \
   V(GreaterThanOrEqual)                     \
   V(Equal)                                  \
   V(NotEqual)                               \
   V(StrictEqual)                            \
   V(StrictNotEqual)                         \
   V(StringEqual)                            \
@@ skipping 918 matching lines @@
   explicit FastNewClosureStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
 
   static compiler::Node* Generate(CodeStubAssembler* assembler,
                                   compiler::Node* shared_info,
                                   compiler::Node* context);
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewClosure);
   DEFINE_TURBOFAN_CODE_STUB(FastNewClosure, TurboFanCodeStub);
 };
 
-
-class FastNewContextStub final : public HydrogenCodeStub {
+class FastNewFunctionContextStub final : public TurboFanCodeStub {
  public:
   static const int kMaximumSlots = 64;
 
-  FastNewContextStub(Isolate* isolate, int slots) : HydrogenCodeStub(isolate) {
+  FastNewFunctionContextStub(Isolate* isolate, int slots)
+      : TurboFanCodeStub(isolate) {
     DCHECK(slots >= 0 && slots <= kMaximumSlots);
-    set_sub_minor_key(SlotsBits::encode(slots));
+    minor_key_ = SlotsBits::encode(slots);
   }
 
-  int slots() const { return SlotsBits::decode(sub_minor_key()); }
-
-  // Parameters accessed via CodeStubGraphBuilder::GetParameter()
-  static const int kFunction = 0;
+  int slots() const { return SlotsBits::decode(minor_key_); }
 
  private:
   class SlotsBits : public BitField<int, 0, 8> {};
 
-  DEFINE_CALL_INTERFACE_DESCRIPTOR(FastNewContext);
-  DEFINE_HYDROGEN_CODE_STUB(FastNewContext, HydrogenCodeStub);
+  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);
 };
@@ skipping 2023 matching lines @@
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 extern Representation RepresentationFromType(Type* type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_