Introduce a code stub version of Array.prototype.push

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 49 matching lines @@
   /* HydrogenCodeStubs */                   \
   V(AllocateInNewSpace)                     \
   V(ArrayNArgumentsConstructor)             \
   V(ArrayNoArgumentConstructor)             \
   V(ArraySingleArgumentConstructor)         \
   V(BinaryOpIC)                             \
   V(BinaryOpWithAllocationSite)             \
   V(CreateAllocationSite)                   \
   V(CreateWeakCell)                         \
   V(ElementsTransitionAndStore)             \
+  V(FastArrayPush)                          \
   V(FastCloneRegExp)                        \
   V(FastCloneShallowArray)                  \
   V(FastCloneShallowObject)                 \
   V(FastNewClosure)                         \
   V(FastNewContext)                         \
   V(FastNewObject)                          \
   V(FastNewRestParameter)                   \
   V(FastNewSloppyArguments)                 \
   V(FastNewStrictArguments)                 \
   V(GrowArrayElements)                      \
@@ skipping 957 matching lines @@
   bool is_js_array() const { return IsJsArrayBits::decode(sub_minor_key()); }
 
  private:
   class ElementsKindBits : public BitField<ElementsKind, 0, 8> {};
   class IsJsArrayBits : public BitField<bool, ElementsKindBits::kNext, 1> {};
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(GrowArrayElements);
   DEFINE_HYDROGEN_CODE_STUB(GrowArrayElements, HydrogenCodeStub);
 };
 
+class FastArrayPushStub : public HydrogenCodeStub {
+ public:
+  explicit FastArrayPushStub(Isolate* isolate) : HydrogenCodeStub(isolate) {}
+
+ private:
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(FastArrayPush);
+  DEFINE_HYDROGEN_CODE_STUB(FastArrayPush, HydrogenCodeStub);
+};
 
 class InstanceOfStub final : public PlatformCodeStub {
  public:
   explicit InstanceOfStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
 
  private:
   DEFINE_CALL_INTERFACE_DESCRIPTOR(InstanceOf);
   DEFINE_PLATFORM_CODE_STUB(InstanceOf, PlatformCodeStub);
 };
 
@@ skipping 1948 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_