Revert of [ic] [stubs] Don't use Code::flags in megamorphic stub cache hash computations.

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 420 matching lines @@
                                      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);
 
   compiler::Node* StubCachePrimaryOffset(compiler::Node* name,
+                                         Code::Flags flags,
                                          compiler::Node* map);
 
   compiler::Node* StubCacheSecondaryOffset(compiler::Node* name,
+                                           Code::Flags flags,
                                            compiler::Node* seed);
 
   // This enum is used here as a replacement for StubCache::Table to avoid
   // including stub cache header.
   enum StubCacheTable : int;
 
   void TryProbeStubCacheTable(StubCache* stub_cache, StubCacheTable table_id,
                               compiler::Node* entry_offset,
-                              compiler::Node* name, compiler::Node* map,
-                              Label* if_handler, Variable* var_handler,
-                              Label* if_miss);
+                              compiler::Node* name, Code::Flags flags,
+                              compiler::Node* map, Label* if_handler,
+                              Variable* var_handler, Label* if_miss);
 
   void TryProbeStubCache(StubCache* stub_cache, compiler::Node* receiver,
                          compiler::Node* name, Label* if_handler,
                          Variable* var_handler, Label* if_miss);
 
   void LoadIC(const LoadICParameters* p);
   void LoadGlobalIC(const LoadICParameters* p);
 
  private:
   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_