Fastpath some spread-call desugaring.

src/contexts.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_CONTEXTS_H_
 #define V8_CONTEXTS_H_
 
 #include "src/heap/heap.h"
 #include "src/objects.h"
 
@@ skipping 40 matching lines @@
   V(OBJECT_IS_FROZEN, JSFunction, object_is_frozen)                     \
   V(OBJECT_IS_SEALED, JSFunction, object_is_sealed)                     \
   V(OBJECT_KEYS, JSFunction, object_keys)                               \
   V(REGEXP_INTERNAL_MATCH, JSFunction, regexp_internal_match)           \
   V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply)                     \
   V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct)             \
   V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property) \
   V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property) \
   V(SPREAD_ARGUMENTS_INDEX, JSFunction, spread_arguments)               \
   V(SPREAD_ITERABLE_INDEX, JSFunction, spread_iterable)                 \
+  V(SPREAD_ITERABLE_PREPARE_INDEX, JSFunction, spread_iterable_prepare) \
   V(MATH_FLOOR_INDEX, JSFunction, math_floor)                           \
   V(MATH_POW_INDEX, JSFunction, math_pow)
 
 #define NATIVE_CONTEXT_IMPORTED_FIELDS(V)                                 \
   V(ARRAY_CONCAT_INDEX, JSFunction, array_concat)                         \
   V(ARRAY_POP_INDEX, JSFunction, array_pop)                               \
   V(ARRAY_PUSH_INDEX, JSFunction, array_push)                             \
   V(ARRAY_SHIFT_INDEX, JSFunction, array_shift)                           \
   V(ARRAY_SPLICE_INDEX, JSFunction, array_splice)                         \
   V(ARRAY_SLICE_INDEX, JSFunction, array_slice)                           \
@@ skipping 146 matching lines @@
   V(FLOAT32X4_FUNCTION_INDEX, JSFunction, float32x4_function)                  \
   V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun)                    \
   V(FAST_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, FixedArray,                      \
     fast_template_instantiations_cache)                                        \
   V(SLOW_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, UnseededNumberDictionary,        \
     slow_template_instantiations_cache)                                        \
   V(FUNCTION_FUNCTION_INDEX, JSFunction, function_function)                    \
   V(GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction,                             \
     generator_function_function)                                               \
   V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \
+  V(INITIAL_ARRAY_ITERATOR_INDEX, JSObject, initial_array_iterator)            \
   V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype)          \
   V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype)  \
   V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype)    \
   V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype)        \
   V(INT16_ARRAY_FUN_INDEX, JSFunction, int16_array_fun)                        \
   V(INT16X8_FUNCTION_INDEX, JSFunction, int16x8_function)                      \
   V(INT32_ARRAY_FUN_INDEX, JSFunction, int32_array_fun)                        \
   V(INT32X4_FUNCTION_INDEX, JSFunction, int32x4_function)                      \
   V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun)                          \
   V(INT8X16_FUNCTION_INDEX, JSFunction, int8x16_function)                      \
@@ skipping 407 matching lines @@
   STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
   STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
 };
 
 typedef Context::Field ContextField;
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CONTEXTS_H_