Reland of [stubs] KeyedStoreGeneric: inline dictionary property stores

For dictionary-mode receivers, the KeyedStoreGeneric stub can store
properties directly in most cases. Doing so avoids the need to have
an entry in the stub cache for every map/property combination.

Original review: https://codereview.chromium.org/2504403005/

Review-Url: https://codereview.chromium.org/2524943002
Cr-Commit-Position: refs/heads/master@{#41218}

src/builtins/builtins-array.cc

@@ -2566,10 +2566,9 @@ void Builtins::Generate_ArrayIteratorPrototypeNext(
 
     Node* elements =
         assembler.AllocateFixedArray(FAST_ELEMENTS, assembler.Int32Constant(2));
-    assembler.StoreFixedArrayElement(elements, assembler.Int32Constant(0),
-                                     index, SKIP_WRITE_BARRIER);
-    assembler.StoreFixedArrayElement(elements, assembler.Int32Constant(1),
-                                     var_value.value(), SKIP_WRITE_BARRIER);
+    assembler.StoreFixedArrayElement(elements, 0, index, SKIP_WRITE_BARRIER);
+    assembler.StoreFixedArrayElement(elements, 1, var_value.value(),
+                                     SKIP_WRITE_BARRIER);
 
     Node* entry = assembler.Allocate(JSArray::kSize);
     Node* map =

src/builtins/builtins-regexp.cc

@@ -293,8 +293,7 @@ compiler::Node* ConstructNewResultFromMatchInfo(Isolate* isolate,
       a->AllocateRegExpResult(context, num_results, start, string);
   Node* const result_elements = a->LoadElements(result);
 
-  a->StoreFixedArrayElement(result_elements, a->IntPtrConstant(0), first,
-                            SKIP_WRITE_BARRIER);
+  a->StoreFixedArrayElement(result_elements, 0, first, SKIP_WRITE_BARRIER);
 
   a->GotoIf(a->SmiEqual(num_results, a->SmiConstant(Smi::FromInt(1))), &out);
 
@@ -1846,7 +1845,7 @@ compiler::Node* ReplaceGlobalCallableFastPath(
 
           Node* const replacement_str = a->ToString(context, replacement_obj);
           a->StoreFixedArrayElement(res_elems, index, replacement_str,
-                                    UPDATE_WRITE_BARRIER, mode);
+                                    UPDATE_WRITE_BARRIER, 0, mode);
 
           a->Goto(&do_continue);
           a->Bind(&do_continue);

src/code-stub-assembler.h

@@ -20,21 +20,24 @@ class StubCache;
 
 enum class PrimitiveType { kBoolean, kNumber, kString, kSymbol };
 
-#define HEAP_CONSTANT_LIST(V)                 \
-  V(BooleanMap, BooleanMap)                   \
-  V(CodeMap, CodeMap)                         \
-  V(empty_string, EmptyString)                \
-  V(EmptyFixedArray, EmptyFixedArray)         \
-  V(FalseValue, False)                        \
-  V(FixedArrayMap, FixedArrayMap)             \
-  V(FixedCOWArrayMap, FixedCOWArrayMap)       \
-  V(FixedDoubleArrayMap, FixedDoubleArrayMap) \
-  V(HeapNumberMap, HeapNumberMap)             \
-  V(MinusZeroValue, MinusZero)                \
-  V(NanValue, Nan)                            \
-  V(NullValue, Null)                          \
-  V(TheHoleValue, TheHole)                    \
-  V(TrueValue, True)                          \
+#define HEAP_CONSTANT_LIST(V)                         \
+  V(AccessorPairMap, AccessorPairMap)                 \
+  V(BooleanMap, BooleanMap)                           \
+  V(CodeMap, CodeMap)                                 \
+  V(empty_string, EmptyString)                        \
+  V(EmptyFixedArray, EmptyFixedArray)                 \
+  V(FalseValue, False)                                \
+  V(FixedArrayMap, FixedArrayMap)                     \
+  V(FixedCOWArrayMap, FixedCOWArrayMap)               \
+  V(FixedDoubleArrayMap, FixedDoubleArrayMap)         \
+  V(FunctionTemplateInfoMap, FunctionTemplateInfoMap) \
+  V(HeapNumberMap, HeapNumberMap)                     \
+  V(MinusZeroValue, MinusZero)                        \
+  V(NanValue, Nan)                                    \
+  V(NullValue, Null)                                  \
+  V(SymbolMap, SymbolMap)                             \
+  V(TheHoleValue, TheHole)                            \
+  V(TrueValue, True)                                  \
   V(UndefinedValue, Undefined)
 
 // Provides JavaScript-specific "macro-assembler" functionality on top of the
@@ -357,15 +360,15 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   // Store an array element to a FixedArray.
   compiler::Node* StoreFixedArrayElement(
       compiler::Node* object, int index, compiler::Node* value,
-      WriteBarrierMode barrier_mode = UPDATE_WRITE_BARRIER,
-      ParameterMode parameter_mode = INTEGER_PARAMETERS) {
-    return StoreFixedArrayElement(object, Int32Constant(index), value,
-                                  barrier_mode, parameter_mode);
+      WriteBarrierMode barrier_mode = UPDATE_WRITE_BARRIER) {
+    return StoreFixedArrayElement(object, IntPtrConstant(index), value,
+                                  barrier_mode, 0, INTPTR_PARAMETERS);
   }
 
   compiler::Node* StoreFixedArrayElement(
       compiler::Node* object, compiler::Node* index, compiler::Node* value,
       WriteBarrierMode barrier_mode = UPDATE_WRITE_BARRIER,
+      int additional_offset = 0,
       ParameterMode parameter_mode = INTEGER_PARAMETERS);
 
   compiler::Node* StoreFixedDoubleArrayElement(
@@ -762,16 +765,35 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   // Calculate a valid size for the a hash table.
   compiler::Node* HashTableComputeCapacity(compiler::Node* at_least_space_for);
 
+  template <class Dictionary>
+  compiler::Node* GetNumberOfElements(compiler::Node* dictionary);
+
+  template <class Dictionary>
+  void SetNumberOfElements(compiler::Node* dictionary,
+                           compiler::Node* num_elements_smi);
+
+  template <class Dictionary>
+  compiler::Node* GetCapacity(compiler::Node* dictionary);
+
+  template <class Dictionary>
+  compiler::Node* GetNextEnumerationIndex(compiler::Node* dictionary);
+
+  template <class Dictionary>
+  void SetNextEnumerationIndex(compiler::Node* dictionary,
+                               compiler::Node* next_enum_index_smi);
+
   // Looks up an entry in a NameDictionaryBase successor. If the entry is found
   // control goes to {if_found} and {var_name_index} contains an index of the
   // key field of the entry found. If the key is not found control goes to
   // {if_not_found}.
   static const int kInlinedDictionaryProbes = 4;
+  enum LookupMode { kFindExisting, kFindInsertionIndex };
   template <typename Dictionary>
   void NameDictionaryLookup(compiler::Node* dictionary,
                             compiler::Node* unique_name, Label* if_found,
                             Variable* var_name_index, Label* if_not_found,
-                            int inlined_probes = kInlinedDictionaryProbes);
+                            int inlined_probes = kInlinedDictionaryProbes,
+                            LookupMode mode = kFindExisting);
 
   compiler::Node* ComputeIntegerHash(compiler::Node* key, compiler::Node* seed);
 
@@ -780,6 +802,19 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
                               compiler::Node* intptr_index, Label* if_found,
                               Variable* var_entry, Label* if_not_found);
 
+  template <class Dictionary>
+  void FindInsertionEntry(compiler::Node* dictionary, compiler::Node* key,
+                          Variable* var_key_index);
+
+  template <class Dictionary>
+  void InsertEntry(compiler::Node* dictionary, compiler::Node* key,
+                   compiler::Node* value, compiler::Node* index,
+                   compiler::Node* enum_index);
+
+  template <class Dictionary>
+  void Add(compiler::Node* dictionary, compiler::Node* key,
+           compiler::Node* value, Label* bailout);
+
   // Tries to check if {object} has own {unique_name} property.
   void TryHasOwnProperty(compiler::Node* object, compiler::Node* map,
                          compiler::Node* instance_type,

src/code-stubs.cc

@@ -2117,7 +2117,7 @@ void StoreScriptContextFieldStub::GenerateAssembly(
   Node* script_context = assembler.LoadScriptContext(context, context_index());
   assembler.StoreFixedArrayElement(
       script_context, assembler.IntPtrConstant(slot_index()), value,
-      UPDATE_WRITE_BARRIER, CodeStubAssembler::INTPTR_PARAMETERS);
+      UPDATE_WRITE_BARRIER, 0, CodeStubAssembler::INTPTR_PARAMETERS);
   assembler.Return(value);
 }
 
@@ -2621,21 +2621,19 @@ compiler::Node* FastNewFunctionContextStub::Generate(
                                             assembler->SmiFromWord32(length));
 
   // Set up the fixed slots.
-  assembler->StoreFixedArrayElement(
-      function_context, assembler->Int32Constant(Context::CLOSURE_INDEX),
-      function, SKIP_WRITE_BARRIER);
-  assembler->StoreFixedArrayElement(
-      function_context, assembler->Int32Constant(Context::PREVIOUS_INDEX),
-      context, SKIP_WRITE_BARRIER);
-  assembler->StoreFixedArrayElement(
-      function_context, assembler->Int32Constant(Context::EXTENSION_INDEX),
-      assembler->TheHoleConstant(), SKIP_WRITE_BARRIER);
+  assembler->StoreFixedArrayElement(function_context, Context::CLOSURE_INDEX,
+                                    function, SKIP_WRITE_BARRIER);
+  assembler->StoreFixedArrayElement(function_context, Context::PREVIOUS_INDEX,
+                                    context, SKIP_WRITE_BARRIER);
+  assembler->StoreFixedArrayElement(function_context, Context::EXTENSION_INDEX,
+                                    assembler->TheHoleConstant(),
+                                    SKIP_WRITE_BARRIER);
 
   // Copy the native context from the previous context.
   Node* native_context = assembler->LoadNativeContext(context);
-  assembler->StoreFixedArrayElement(
-      function_context, assembler->Int32Constant(Context::NATIVE_CONTEXT_INDEX),
-      native_context, SKIP_WRITE_BARRIER);
+  assembler->StoreFixedArrayElement(function_context,
+                                    Context::NATIVE_CONTEXT_INDEX,
+                                    native_context, SKIP_WRITE_BARRIER);
 
   // Initialize the rest of the slots to undefined.
   Node* undefined = assembler->UndefinedConstant();

src/ic/accessor-assembler.cc

@@ -1367,9 +1367,8 @@ void AccessorAssemblerImpl::KeyedLoadICGeneric(const LoadICParameters* p) {
     const int32_t kMaxLinear = 210;
     Label stub_cache(this);
     Node* bitfield3 = LoadMapBitField3(receiver_map);
-    Node* nof =
-        DecodeWordFromWord32<Map::NumberOfOwnDescriptorsBits>(bitfield3);
-    GotoIf(UintPtrGreaterThan(nof, IntPtrConstant(kMaxLinear)), &stub_cache);
+    Node* nof = DecodeWord32<Map::NumberOfOwnDescriptorsBits>(bitfield3);
+    GotoIf(Uint32LessThan(Int32Constant(kMaxLinear), nof), &stub_cache);
     Node* descriptors = LoadMapDescriptors(receiver_map);
     Variable var_name_index(this, MachineType::PointerRepresentation());
     Label if_descriptor_found(this);

src/objects.h

@@ -3851,6 +3851,8 @@ class Dictionary: public HashTable<Derived, Shape, Key> {
   static const int kMaxNumberKeyIndex = DerivedHashTable::kPrefixStartIndex;
   static const int kNextEnumerationIndexIndex = kMaxNumberKeyIndex + 1;
 
+  static const bool kIsEnumerable = Shape::kIsEnumerable;
+
  protected:
   // Generic at put operation.
   MUST_USE_RESULT static Handle<Derived> AtPut(
@@ -9590,14 +9592,15 @@ class Symbol: public Name {
   static const int kFlagsOffset = kNameOffset + kPointerSize;
   static const int kSize = kFlagsOffset + kPointerSize;
 
+  // Flags layout.
+  static const int kPrivateBit = 0;
+  static const int kWellKnownSymbolBit = 1;
+
   typedef FixedBodyDescriptor<kNameOffset, kFlagsOffset, kSize> BodyDescriptor;
 
   void SymbolShortPrint(std::ostream& os);
 
  private:
-  static const int kPrivateBit = 0;
-  static const int kWellKnownSymbolBit = 1;
-
   const char* PrivateSymbolToName() const;
 
 #if TRACE_MAPS

test/mjsunit/regress/regress-private-enumerable.js

@@ -2,7 +2,30 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --allow-natives-syntax
+
 class A {}
 class B {}
 Object.assign(B, A);
 assertEquals("class B {}", B.toString());
+
+(function() {
+  function f(a, i, v) {
+    a[i] = v;
+  }
+
+  f("make it generic", 0, 0);
+
+  var o = {foo: "foo"};
+  %OptimizeObjectForAddingMultipleProperties(o, 10);
+
+  var s = %CreatePrivateSymbol("priv");
+  f(o, s, "private");
+  %ToFastProperties(o);
+
+  var desc = Object.getOwnPropertyDescriptor(o, s);
+  assertEquals("private", desc.value);
+  assertTrue(desc.writable);
+  assertFalse(desc.enumerable);
+  assertTrue(desc.configurable);
+})();