[KeyedLoadIC] Support Smi "handlers" for element loads

src/code-stub-assembler.h

 // Copyright 2016 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_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 431 matching lines @@
   compiler::Node* TryMonomorphicCase(const LoadICParameters* p,
                                      compiler::Node* receiver_map,
                                      Label* if_handler, Variable* var_handler,
                                      Label* if_miss);
   void HandlePolymorphicCase(const LoadICParameters* p,
                              compiler::Node* receiver_map,
                              compiler::Node* feedback, Label* if_handler,
                              Variable* var_handler, Label* if_miss,
                              int unroll_count);
 
-  void HandleLoadICHandlerCase(const LoadICParameters* p,
-                               compiler::Node* handler, Label* miss);
-
   compiler::Node* StubCachePrimaryOffset(compiler::Node* name,
                                          compiler::Node* map);
 
   compiler::Node* StubCacheSecondaryOffset(compiler::Node* name,
                                            compiler::Node* seed);
 
   // This enum is used here as a replacement for StubCache::Table to avoid
   // including stub cache header.
   enum StubCacheTable : int;
 
@@ skipping 14 matching lines @@
   // Get the enumerable length from |map| and return the result as a Smi.
   compiler::Node* EnumLength(compiler::Node* map);
 
   // Check the cache validity for |receiver|. Branch to |use_cache| if
   // the cache is valid, otherwise branch to |use_runtime|.
   void CheckEnumCache(compiler::Node* receiver,
                       CodeStubAssembler::Label* use_cache,
                       CodeStubAssembler::Label* use_runtime);
 
  private:
+  enum ElementSupport { kOnlyProperties, kSupportElements };
+
+  void HandleLoadICHandlerCase(
+      const LoadICParameters* p, compiler::Node* handler, Label* miss,
+      ElementSupport support_elements = kOnlyProperties);
+
   compiler::Node* ElementOffsetFromIndex(compiler::Node* index,
                                          ElementsKind kind, ParameterMode mode,
                                          int base_size = 0);
 
   compiler::Node* AllocateRawAligned(compiler::Node* size_in_bytes,
                                      AllocationFlags flags,
                                      compiler::Node* top_address,
                                      compiler::Node* limit_address);
   compiler::Node* AllocateRawUnaligned(compiler::Node* size_in_bytes,
                                        AllocationFlags flags,
                                        compiler::Node* top_adddress,
                                        compiler::Node* limit_address);
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_