[heap] Move RegExpResultCache out of the heap.

R=yangguo@chromium.org,hpayer@chromium.org

Review URL: https://codereview.chromium.org/1306053003

Cr-Commit-Position: refs/heads/master@{#30300}

src/heap/heap.cc

@@ -3426,98 +3426,6 @@ bool Heap::RootCanBeTreatedAsConstant(RootListIndex root_index) {
 }
 
 
-Object* RegExpResultsCache::Lookup(Heap* heap, String* key_string,
-                                   Object* key_pattern, ResultsCacheType type) {
-  FixedArray* cache;
-  if (!key_string->IsInternalizedString()) return Smi::FromInt(0);
-  if (type == STRING_SPLIT_SUBSTRINGS) {
-    DCHECK(key_pattern->IsString());
-    if (!key_pattern->IsInternalizedString()) return Smi::FromInt(0);
-    cache = heap->string_split_cache();
-  } else {
-    DCHECK(type == REGEXP_MULTIPLE_INDICES);
-    DCHECK(key_pattern->IsFixedArray());
-    cache = heap->regexp_multiple_cache();
-  }
-
-  uint32_t hash = key_string->Hash();
-  uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) &
-                    ~(kArrayEntriesPerCacheEntry - 1));
-  if (cache->get(index + kStringOffset) == key_string &&
-      cache->get(index + kPatternOffset) == key_pattern) {
-    return cache->get(index + kArrayOffset);
-  }
-  index =
-      ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1));
-  if (cache->get(index + kStringOffset) == key_string &&
-      cache->get(index + kPatternOffset) == key_pattern) {
-    return cache->get(index + kArrayOffset);
-  }
-  return Smi::FromInt(0);
-}
-
-
-void RegExpResultsCache::Enter(Isolate* isolate, Handle<String> key_string,
-                               Handle<Object> key_pattern,
-                               Handle<FixedArray> value_array,
-                               ResultsCacheType type) {
-  Factory* factory = isolate->factory();
-  Handle<FixedArray> cache;
-  if (!key_string->IsInternalizedString()) return;
-  if (type == STRING_SPLIT_SUBSTRINGS) {
-    DCHECK(key_pattern->IsString());
-    if (!key_pattern->IsInternalizedString()) return;
-    cache = factory->string_split_cache();
-  } else {
-    DCHECK(type == REGEXP_MULTIPLE_INDICES);
-    DCHECK(key_pattern->IsFixedArray());
-    cache = factory->regexp_multiple_cache();
-  }
-
-  uint32_t hash = key_string->Hash();
-  uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) &
-                    ~(kArrayEntriesPerCacheEntry - 1));
-  if (cache->get(index + kStringOffset) == Smi::FromInt(0)) {
-    cache->set(index + kStringOffset, *key_string);
-    cache->set(index + kPatternOffset, *key_pattern);
-    cache->set(index + kArrayOffset, *value_array);
-  } else {
-    uint32_t index2 =
-        ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1));
-    if (cache->get(index2 + kStringOffset) == Smi::FromInt(0)) {
-      cache->set(index2 + kStringOffset, *key_string);
-      cache->set(index2 + kPatternOffset, *key_pattern);
-      cache->set(index2 + kArrayOffset, *value_array);
-    } else {
-      cache->set(index2 + kStringOffset, Smi::FromInt(0));
-      cache->set(index2 + kPatternOffset, Smi::FromInt(0));
-      cache->set(index2 + kArrayOffset, Smi::FromInt(0));
-      cache->set(index + kStringOffset, *key_string);
-      cache->set(index + kPatternOffset, *key_pattern);
-      cache->set(index + kArrayOffset, *value_array);
-    }
-  }
-  // If the array is a reasonably short list of substrings, convert it into a
-  // list of internalized strings.
-  if (type == STRING_SPLIT_SUBSTRINGS && value_array->length() < 100) {
-    for (int i = 0; i < value_array->length(); i++) {
-      Handle<String> str(String::cast(value_array->get(i)), isolate);
-      Handle<String> internalized_str = factory->InternalizeString(str);
-      value_array->set(i, *internalized_str);
-    }
-  }
-  // Convert backing store to a copy-on-write array.
-  value_array->set_map_no_write_barrier(*factory->fixed_cow_array_map());
-}
-
-
-void RegExpResultsCache::Clear(FixedArray* cache) {
-  for (int i = 0; i < kRegExpResultsCacheSize; i++) {
-    cache->set(i, Smi::FromInt(0));
-  }
-}
-
-
 int Heap::FullSizeNumberStringCacheLength() {
   // Compute the size of the number string cache based on the max newspace size.
   // The number string cache has a minimum size based on twice the initial cache

src/heap/heap.h

@@ -2643,30 +2643,6 @@ class DescriptorLookupCache {
 };
 
 
-class RegExpResultsCache {
- public:
-  enum ResultsCacheType { REGEXP_MULTIPLE_INDICES, STRING_SPLIT_SUBSTRINGS };
-
-  // Attempt to retrieve a cached result.  On failure, 0 is returned as a Smi.
-  // On success, the returned result is guaranteed to be a COW-array.
-  static Object* Lookup(Heap* heap, String* key_string, Object* key_pattern,
-                        ResultsCacheType type);
-  // Attempt to add value_array to the cache specified by type.  On success,
-  // value_array is turned into a COW-array.
-  static void Enter(Isolate* isolate, Handle<String> key_string,
-                    Handle<Object> key_pattern, Handle<FixedArray> value_array,
-                    ResultsCacheType type);
-  static void Clear(FixedArray* cache);
-  static const int kRegExpResultsCacheSize = 0x100;
-
- private:
-  static const int kArrayEntriesPerCacheEntry = 4;
-  static const int kStringOffset = 0;
-  static const int kPatternOffset = 1;
-  static const int kArrayOffset = 2;
-};
-
-
 // Abstract base class for checking whether a weak object should be retained.
 class WeakObjectRetainer {
  public:

src/regexp/jsregexp.cc

@@ -6406,5 +6406,98 @@ bool RegExpEngine::TooMuchRegExpCode(Handle<String> pattern) {
   }
   return too_much;
 }
+
+
+Object* RegExpResultsCache::Lookup(Heap* heap, String* key_string,
+                                   Object* key_pattern, ResultsCacheType type) {
+  FixedArray* cache;
+  if (!key_string->IsInternalizedString()) return Smi::FromInt(0);
+  if (type == STRING_SPLIT_SUBSTRINGS) {
+    DCHECK(key_pattern->IsString());
+    if (!key_pattern->IsInternalizedString()) return Smi::FromInt(0);
+    cache = heap->string_split_cache();
+  } else {
+    DCHECK(type == REGEXP_MULTIPLE_INDICES);
+    DCHECK(key_pattern->IsFixedArray());
+    cache = heap->regexp_multiple_cache();
+  }
+
+  uint32_t hash = key_string->Hash();
+  uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) &
+                    ~(kArrayEntriesPerCacheEntry - 1));
+  if (cache->get(index + kStringOffset) == key_string &&
+      cache->get(index + kPatternOffset) == key_pattern) {
+    return cache->get(index + kArrayOffset);
+  }
+  index =
+      ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1));
+  if (cache->get(index + kStringOffset) == key_string &&
+      cache->get(index + kPatternOffset) == key_pattern) {
+    return cache->get(index + kArrayOffset);
+  }
+  return Smi::FromInt(0);
+}
+
+
+void RegExpResultsCache::Enter(Isolate* isolate, Handle<String> key_string,
+                               Handle<Object> key_pattern,
+                               Handle<FixedArray> value_array,
+                               ResultsCacheType type) {
+  Factory* factory = isolate->factory();
+  Handle<FixedArray> cache;
+  if (!key_string->IsInternalizedString()) return;
+  if (type == STRING_SPLIT_SUBSTRINGS) {
+    DCHECK(key_pattern->IsString());
+    if (!key_pattern->IsInternalizedString()) return;
+    cache = factory->string_split_cache();
+  } else {
+    DCHECK(type == REGEXP_MULTIPLE_INDICES);
+    DCHECK(key_pattern->IsFixedArray());
+    cache = factory->regexp_multiple_cache();
+  }
+
+  uint32_t hash = key_string->Hash();
+  uint32_t index = ((hash & (kRegExpResultsCacheSize - 1)) &
+                    ~(kArrayEntriesPerCacheEntry - 1));
+  if (cache->get(index + kStringOffset) == Smi::FromInt(0)) {
+    cache->set(index + kStringOffset, *key_string);
+    cache->set(index + kPatternOffset, *key_pattern);
+    cache->set(index + kArrayOffset, *value_array);
+  } else {
+    uint32_t index2 =
+        ((index + kArrayEntriesPerCacheEntry) & (kRegExpResultsCacheSize - 1));
+    if (cache->get(index2 + kStringOffset) == Smi::FromInt(0)) {
+      cache->set(index2 + kStringOffset, *key_string);
+      cache->set(index2 + kPatternOffset, *key_pattern);
+      cache->set(index2 + kArrayOffset, *value_array);
+    } else {
+      cache->set(index2 + kStringOffset, Smi::FromInt(0));
+      cache->set(index2 + kPatternOffset, Smi::FromInt(0));
+      cache->set(index2 + kArrayOffset, Smi::FromInt(0));
+      cache->set(index + kStringOffset, *key_string);
+      cache->set(index + kPatternOffset, *key_pattern);
+      cache->set(index + kArrayOffset, *value_array);
+    }
+  }
+  // If the array is a reasonably short list of substrings, convert it into a
+  // list of internalized strings.
+  if (type == STRING_SPLIT_SUBSTRINGS && value_array->length() < 100) {
+    for (int i = 0; i < value_array->length(); i++) {
+      Handle<String> str(String::cast(value_array->get(i)), isolate);
+      Handle<String> internalized_str = factory->InternalizeString(str);
+      value_array->set(i, *internalized_str);
+    }
+  }
+  // Convert backing store to a copy-on-write array.
+  value_array->set_map_no_write_barrier(*factory->fixed_cow_array_map());
+}
+
+
+void RegExpResultsCache::Clear(FixedArray* cache) {
+  for (int i = 0; i < kRegExpResultsCacheSize; i++) {
+    cache->set(i, Smi::FromInt(0));
+  }
+}
+
 }  // namespace internal
 }  // namespace v8

src/regexp/jsregexp.h

@@ -1659,6 +1659,30 @@ class RegExpEngine: public AllStatic {
 };
 
 
-} }  // namespace v8::internal
+class RegExpResultsCache : public AllStatic {
+ public:
+  enum ResultsCacheType { REGEXP_MULTIPLE_INDICES, STRING_SPLIT_SUBSTRINGS };
+
+  // Attempt to retrieve a cached result.  On failure, 0 is returned as a Smi.
+  // On success, the returned result is guaranteed to be a COW-array.
+  static Object* Lookup(Heap* heap, String* key_string, Object* key_pattern,
+                        ResultsCacheType type);
+  // Attempt to add value_array to the cache specified by type.  On success,
+  // value_array is turned into a COW-array.
+  static void Enter(Isolate* isolate, Handle<String> key_string,
+                    Handle<Object> key_pattern, Handle<FixedArray> value_array,
+                    ResultsCacheType type);
+  static void Clear(FixedArray* cache);
+  static const int kRegExpResultsCacheSize = 0x100;
+
+ private:
+  static const int kArrayEntriesPerCacheEntry = 4;
+  static const int kStringOffset = 0;
+  static const int kPatternOffset = 1;
+  static const int kArrayOffset = 2;
+};
+
+}  // namespace internal
+}  // namespace v8
 
 #endif  // V8_REGEXP_JSREGEXP_H_