KeyLookupCache,DescriptorLookupCache: heap.h -> lookup.h

src/lookup-inl.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.
+
+#include "src/lookup.h"
+
+namespace v8 {
+namespace internal {
+
+// static
+int DescriptorLookupCache::Hash(Object* source, Name* name) {
+  DCHECK(name->IsUniqueName());
+  // Uses only lower 32 bits if pointers are larger.
+  uint32_t source_hash =
+      static_cast<uint32_t>(reinterpret_cast<uintptr_t>(source)) >>
+      kPointerSizeLog2;
+  uint32_t name_hash = name->hash_field();
+  return (source_hash ^ name_hash) % kLength;
+}
+
+int DescriptorLookupCache::Lookup(Map* source, Name* name) {
+  int index = Hash(source, name);
+  Key& key = keys_[index];
+  if ((key.source == source) && (key.name == name)) return results_[index];
+  return kAbsent;
+}
+
+void DescriptorLookupCache::Update(Map* source, Name* name, int result) {
+  DCHECK(result != kAbsent);
+  int index = Hash(source, name);
+  Key& key = keys_[index];
+  key.source = source;
+  key.name = name;
+  results_[index] = result;
+}
+
+}  // namespace internal
+}  // namespace v8