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// Copyright 2017 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/builtins/builtins-collections-gen.h"
#include "src/builtins/builtins-constructor-gen.h"
#include "src/builtins/builtins-iterator-gen.h"
#include "src/builtins/builtins-utils-gen.h"
#include "src/codegen/code-stub-assembler.h"
#include "src/heap/factory-inl.h"
#include "src/heap/heap-inl.h"
#include "src/objects/hash-table-inl.h"
#include "src/objects/js-collection.h"
#include "src/objects/ordered-hash-table.h"
namespace v8 {
namespace internal {
using compiler::Node;
template <class T>
using TNode = compiler::TNode<T>;
template <class T>
using TVariable = compiler::TypedCodeAssemblerVariable<T>;
class BaseCollectionsAssembler : public CodeStubAssembler {
public:
explicit BaseCollectionsAssembler(compiler::CodeAssemblerState* state)
: CodeStubAssembler(state) {}
virtual ~BaseCollectionsAssembler() = default;
protected:
enum Variant { kMap, kSet, kWeakMap, kWeakSet };
// Adds an entry to a collection. For Maps, properly handles extracting the
// key and value from the entry (see LoadKeyValue()).
void AddConstructorEntry(Variant variant, TNode<Context> context,
TNode<Object> collection, TNode<Object> add_function,
TNode<Object> key_value,
Label* if_may_have_side_effects = nullptr,
Label* if_exception = nullptr,
TVariable<Object>* var_exception = nullptr);
// Adds constructor entries to a collection. Choosing a fast path when
// possible.
void AddConstructorEntries(Variant variant, TNode<Context> context,
TNode<Context> native_context,
TNode<Object> collection,
TNode<Object> initial_entries);
// Fast path for adding constructor entries. Assumes the entries are a fast
// JS array (see CodeStubAssembler::BranchIfFastJSArray()).
void AddConstructorEntriesFromFastJSArray(Variant variant,
TNode<Context> context,
TNode<Context> native_context,
TNode<Object> collection,
TNode<JSArray> fast_jsarray,
Label* if_may_have_side_effects);
// Adds constructor entries to a collection using the iterator protocol.
void AddConstructorEntriesFromIterable(Variant variant,
TNode<Context> context,
TNode<Context> native_context,
TNode<Object> collection,
TNode<Object> iterable);
// Constructs a collection instance. Choosing a fast path when possible.
TNode<JSObject> AllocateJSCollection(TNode<Context> context,
TNode<JSFunction> constructor,
TNode<JSReceiver> new_target);
// Fast path for constructing a collection instance if the constructor
// function has not been modified.
TNode<JSObject> AllocateJSCollectionFast(TNode<JSFunction> constructor);
// Fallback for constructing a collection instance if the constructor function
// has been modified.
TNode<JSObject> AllocateJSCollectionSlow(TNode<Context> context,
TNode<JSFunction> constructor,
TNode<JSReceiver> new_target);
// Allocates the backing store for a collection.
virtual TNode<Object> AllocateTable(Variant variant, TNode<Context> context,
TNode<IntPtrT> at_least_space_for) = 0;
// Main entry point for a collection constructor builtin.
void GenerateConstructor(Variant variant,
Handle<String> constructor_function_name,
TNode<Object> new_target, TNode<IntPtrT> argc,
TNode<Context> context);
// Retrieves the collection function that adds an entry. `set` for Maps and
// `add` for Sets.
TNode<Object> GetAddFunction(Variant variant, TNode<Context> context,
TNode<Object> collection);
// Retrieves the collection constructor function.
TNode<JSFunction> GetConstructor(Variant variant,
TNode<Context> native_context);
// Retrieves the initial collection function that adds an entry. Should only
// be called when it is certain that a collection prototype's map hasn't been
// changed.
TNode<JSFunction> GetInitialAddFunction(Variant variant,
TNode<Context> native_context);
// Checks whether {collection}'s initial add/set function has been modified
// (depending on {variant}, loaded from {native_context}).
void GotoIfInitialAddFunctionModified(Variant variant,
TNode<NativeContext> native_context,
TNode<HeapObject> collection,
Label* if_modified);
// Gets root index for the name of the add/set function.
RootIndex GetAddFunctionNameIndex(Variant variant);
// Retrieves the offset to access the backing table from the collection.
int GetTableOffset(Variant variant);
// Estimates the number of entries the collection will have after adding the
// entries passed in the constructor. AllocateTable() can use this to avoid
// the time of growing/rehashing when adding the constructor entries.
TNode<IntPtrT> EstimatedInitialSize(TNode<Object> initial_entries,
TNode<BoolT> is_fast_jsarray);
void GotoIfNotJSReceiver(Node* const obj, Label* if_not_receiver);
// Determines whether the collection's prototype has been modified.
TNode<BoolT> HasInitialCollectionPrototype(Variant variant,
TNode<Context> native_context,
TNode<Object> collection);
// Gets the initial prototype map for given collection {variant}.
TNode<Map> GetInitialCollectionPrototype(Variant variant,
TNode<Context> native_context);
// Loads an element from a fixed array. If the element is the hole, returns
// `undefined`.
TNode<Object> LoadAndNormalizeFixedArrayElement(TNode<FixedArray> elements,
TNode<IntPtrT> index);
// Loads an element from a fixed double array. If the element is the hole,
// returns `undefined`.
TNode<Object> LoadAndNormalizeFixedDoubleArrayElement(
TNode<HeapObject> elements, TNode<IntPtrT> index);
};
void BaseCollectionsAssembler::AddConstructorEntry(
Variant variant, TNode<Context> context, TNode<Object> collection,
TNode<Object> add_function, TNode<Object> key_value,
Label* if_may_have_side_effects, Label* if_exception,
TVariable<Object>* var_exception) {
compiler::CodeAssemblerScopedExceptionHandler handler(this, if_exception,
var_exception);
CSA_ASSERT(this, Word32BinaryNot(IsTheHole(key_value)));
if (variant == kMap || variant == kWeakMap) {
TorqueStructKeyValuePair pair =
if_may_have_side_effects != nullptr
? LoadKeyValuePairNoSideEffects(context, key_value,
if_may_have_side_effects)
: LoadKeyValuePair(context, key_value);
Node* key_n = pair.key;
Node* value_n = pair.value;
CallJS(CodeFactory::Call(isolate()), context, add_function, collection,
key_n, value_n);
} else {
DCHECK(variant == kSet || variant == kWeakSet);
CallJS(CodeFactory::Call(isolate()), context, add_function, collection,
key_value);
}
}
void BaseCollectionsAssembler::AddConstructorEntries(
Variant variant, TNode<Context> context, TNode<Context> native_context,
TNode<Object> collection, TNode<Object> initial_entries) {
TVARIABLE(BoolT, use_fast_loop,
IsFastJSArrayWithNoCustomIteration(context, initial_entries));
TNode<IntPtrT> at_least_space_for =
EstimatedInitialSize(initial_entries, use_fast_loop.value());
Label allocate_table(this, &use_fast_loop), exit(this), fast_loop(this),
slow_loop(this, Label::kDeferred);
Goto(&allocate_table);
BIND(&allocate_table);
{
TNode<Object> table = AllocateTable(variant, context, at_least_space_for);
StoreObjectField(collection, GetTableOffset(variant), table);
GotoIf(IsNullOrUndefined(initial_entries), &exit);
GotoIfInitialAddFunctionModified(variant, CAST(native_context),
CAST(collection), &slow_loop);
Branch(use_fast_loop.value(), &fast_loop, &slow_loop);
}
BIND(&fast_loop);
{
TNode<JSArray> initial_entries_jsarray =
UncheckedCast<JSArray>(initial_entries);
#if DEBUG
CSA_ASSERT(this, IsFastJSArrayWithNoCustomIteration(
context, initial_entries_jsarray));
TNode<Map> original_initial_entries_map = LoadMap(initial_entries_jsarray);
#endif
Label if_may_have_side_effects(this, Label::kDeferred);
AddConstructorEntriesFromFastJSArray(variant, context, native_context,
collection, initial_entries_jsarray,
&if_may_have_side_effects);
Goto(&exit);
if (variant == kMap || variant == kWeakMap) {
BIND(&if_may_have_side_effects);
#if DEBUG
{
// Check that add/set function has not been modified.
Label if_not_modified(this), if_modified(this);
GotoIfInitialAddFunctionModified(variant, CAST(native_context),
CAST(collection), &if_modified);
Goto(&if_not_modified);
BIND(&if_modified);
Unreachable();
BIND(&if_not_modified);
}
CSA_ASSERT(this, TaggedEqual(original_initial_entries_map,
LoadMap(initial_entries_jsarray)));
#endif
use_fast_loop = Int32FalseConstant();
Goto(&allocate_table);
}
}
BIND(&slow_loop);
{
AddConstructorEntriesFromIterable(variant, context, native_context,
collection, initial_entries);
Goto(&exit);
}
BIND(&exit);
}
void BaseCollectionsAssembler::AddConstructorEntriesFromFastJSArray(
Variant variant, TNode<Context> context, TNode<Context> native_context,
TNode<Object> collection, TNode<JSArray> fast_jsarray,
Label* if_may_have_side_effects) {
TNode<FixedArrayBase> elements = LoadElements(fast_jsarray);
TNode<Int32T> elements_kind = LoadElementsKind(fast_jsarray);
TNode<JSFunction> add_func = GetInitialAddFunction(variant, native_context);
CSA_ASSERT(this,
TaggedEqual(GetAddFunction(variant, native_context, collection),
add_func));
CSA_ASSERT(this, IsFastJSArrayWithNoCustomIteration(context, fast_jsarray));
TNode<IntPtrT> length = SmiUntag(LoadFastJSArrayLength(fast_jsarray));
CSA_ASSERT(this, IntPtrGreaterThanOrEqual(length, IntPtrConstant(0)));
CSA_ASSERT(
this, HasInitialCollectionPrototype(variant, native_context, collection));
#if DEBUG
TNode<Map> original_collection_map = LoadMap(CAST(collection));
TNode<Map> original_fast_js_array_map = LoadMap(fast_jsarray);
#endif
Label exit(this), if_doubles(this), if_smiorobjects(this);
GotoIf(IntPtrEqual(length, IntPtrConstant(0)), &exit);
Branch(IsFastSmiOrTaggedElementsKind(elements_kind), &if_smiorobjects,
&if_doubles);
BIND(&if_smiorobjects);
{
auto set_entry = [&](Node* index) {
TNode<Object> element = LoadAndNormalizeFixedArrayElement(
CAST(elements), UncheckedCast<IntPtrT>(index));
AddConstructorEntry(variant, context, collection, add_func, element,
if_may_have_side_effects);
};
// Instead of using the slower iteration protocol to iterate over the
// elements, a fast loop is used. This assumes that adding an element
// to the collection does not call user code that could mutate the elements
// or collection.
BuildFastLoop(IntPtrConstant(0), length, set_entry, 1,
ParameterMode::INTPTR_PARAMETERS, IndexAdvanceMode::kPost);
Goto(&exit);
}
BIND(&if_doubles);
{
// A Map constructor requires entries to be arrays (ex. [key, value]),
// so a FixedDoubleArray can never succeed.
if (variant == kMap || variant == kWeakMap) {
CSA_ASSERT(this, IntPtrGreaterThan(length, IntPtrConstant(0)));
TNode<Object> element =
LoadAndNormalizeFixedDoubleArrayElement(elements, IntPtrConstant(0));
ThrowTypeError(context, MessageTemplate::kIteratorValueNotAnObject,
element);
} else {
DCHECK(variant == kSet || variant == kWeakSet);
auto set_entry = [&](Node* index) {
TNode<Object> entry = LoadAndNormalizeFixedDoubleArrayElement(
elements, UncheckedCast<IntPtrT>(index));
AddConstructorEntry(variant, context, collection, add_func, entry);
};
BuildFastLoop(IntPtrConstant(0), length, set_entry, 1,
ParameterMode::INTPTR_PARAMETERS, IndexAdvanceMode::kPost);
Goto(&exit);
}
}
BIND(&exit);
#if DEBUG
CSA_ASSERT(this,
TaggedEqual(original_collection_map, LoadMap(CAST(collection))));
CSA_ASSERT(this,
TaggedEqual(original_fast_js_array_map, LoadMap(fast_jsarray)));
#endif
}
void BaseCollectionsAssembler::AddConstructorEntriesFromIterable(
Variant variant, TNode<Context> context, TNode<Context> native_context,
TNode<Object> collection, TNode<Object> iterable) {
Label exit(this), loop(this), if_exception(this, Label::kDeferred);
CSA_ASSERT(this, Word32BinaryNot(IsNullOrUndefined(iterable)));
TNode<Object> add_func = GetAddFunction(variant, context, collection);
IteratorBuiltinsAssembler iterator_assembler(this->state());
TorqueStructIteratorRecord iterator =
iterator_assembler.GetIterator(context, iterable);
CSA_ASSERT(this, Word32BinaryNot(IsUndefined(iterator.object)));
TNode<Map> fast_iterator_result_map = CAST(
LoadContextElement(native_context, Context::ITERATOR_RESULT_MAP_INDEX));
TVARIABLE(Object, var_exception);
Goto(&loop);
BIND(&loop);
{
TNode<JSReceiver> next = iterator_assembler.IteratorStep(
context, iterator, &exit, fast_iterator_result_map);
TNode<Object> next_value = iterator_assembler.IteratorValue(
context, next, fast_iterator_result_map);
AddConstructorEntry(variant, context, collection, add_func, next_value,
nullptr, &if_exception, &var_exception);
Goto(&loop);
}
BIND(&if_exception);
{
iterator_assembler.IteratorCloseOnException(context, iterator,
var_exception.value());
}
BIND(&exit);
}
RootIndex BaseCollectionsAssembler::GetAddFunctionNameIndex(Variant variant) {
switch (variant) {
case kMap:
case kWeakMap:
return RootIndex::kset_string;
case kSet:
case kWeakSet:
return RootIndex::kadd_string;
}
UNREACHABLE();
}
void BaseCollectionsAssembler::GotoIfInitialAddFunctionModified(
Variant variant, TNode<NativeContext> native_context,
TNode<HeapObject> collection, Label* if_modified) {
STATIC_ASSERT(JSCollection::kAddFunctionDescriptorIndex ==
JSWeakCollection::kAddFunctionDescriptorIndex);
// TODO(jgruber): Investigate if this should also fall back to full prototype
// verification.
static constexpr PrototypeCheckAssembler::Flags flags{
PrototypeCheckAssembler::kCheckPrototypePropertyConstness};
static constexpr int kNoContextIndex = -1;
STATIC_ASSERT(
(flags & PrototypeCheckAssembler::kCheckPrototypePropertyIdentity) == 0);
using DescriptorIndexNameValue =
PrototypeCheckAssembler::DescriptorIndexNameValue;
DescriptorIndexNameValue property_to_check{
JSCollection::kAddFunctionDescriptorIndex,
GetAddFunctionNameIndex(variant), kNoContextIndex};
PrototypeCheckAssembler prototype_check_assembler(
state(), flags, native_context,
GetInitialCollectionPrototype(variant, native_context),
Vector<DescriptorIndexNameValue>(&property_to_check, 1));
TNode<HeapObject> prototype = LoadMapPrototype(LoadMap(collection));
Label if_unmodified(this);
prototype_check_assembler.CheckAndBranch(prototype, &if_unmodified,
if_modified);
BIND(&if_unmodified);
}
TNode<JSObject> BaseCollectionsAssembler::AllocateJSCollection(
TNode<Context> context, TNode<JSFunction> constructor,
TNode<JSReceiver> new_target) {
TNode<BoolT> is_target_unmodified = TaggedEqual(constructor, new_target);
return Select<JSObject>(
is_target_unmodified,
[=] { return AllocateJSCollectionFast(constructor); },
[=] {
return AllocateJSCollectionSlow(context, constructor, new_target);
});
}
TNode<JSObject> BaseCollectionsAssembler::AllocateJSCollectionFast(
TNode<JSFunction> constructor) {
CSA_ASSERT(this, IsConstructorMap(LoadMap(constructor)));
TNode<Map> initial_map =
CAST(LoadJSFunctionPrototypeOrInitialMap(constructor));
return AllocateJSObjectFromMap(initial_map);
}
TNode<JSObject> BaseCollectionsAssembler::AllocateJSCollectionSlow(
TNode<Context> context, TNode<JSFunction> constructor,
TNode<JSReceiver> new_target) {
ConstructorBuiltinsAssembler constructor_assembler(this->state());
return constructor_assembler.EmitFastNewObject(context, constructor,
new_target);
}
void BaseCollectionsAssembler::GenerateConstructor(
Variant variant, Handle<String> constructor_function_name,
TNode<Object> new_target, TNode<IntPtrT> argc, TNode<Context> context) {
const int kIterableArg = 0;
CodeStubArguments args(this, argc);
TNode<Object> iterable = args.GetOptionalArgumentValue(kIterableArg);
Label if_undefined(this, Label::kDeferred);
GotoIf(IsUndefined(new_target), &if_undefined);
TNode<NativeContext> native_context = LoadNativeContext(context);
TNode<JSObject> collection = AllocateJSCollection(
context, GetConstructor(variant, native_context), CAST(new_target));
AddConstructorEntries(variant, context, native_context, collection, iterable);
Return(collection);
BIND(&if_undefined);
ThrowTypeError(context, MessageTemplate::kConstructorNotFunction,
HeapConstant(constructor_function_name));
}
TNode<Object> BaseCollectionsAssembler::GetAddFunction(
Variant variant, TNode<Context> context, TNode<Object> collection) {
Handle<String> add_func_name = (variant == kMap || variant == kWeakMap)
? isolate()->factory()->set_string()
: isolate()->factory()->add_string();
TNode<Object> add_func = GetProperty(context, collection, add_func_name);
Label exit(this), if_notcallable(this, Label::kDeferred);
GotoIf(TaggedIsSmi(add_func), &if_notcallable);
GotoIfNot(IsCallable(CAST(add_func)), &if_notcallable);
Goto(&exit);
BIND(&if_notcallable);
ThrowTypeError(context, MessageTemplate::kPropertyNotFunction, add_func,
HeapConstant(add_func_name), collection);
BIND(&exit);
return add_func;
}
TNode<JSFunction> BaseCollectionsAssembler::GetConstructor(
Variant variant, TNode<Context> native_context) {
int index;
switch (variant) {
case kMap:
index = Context::JS_MAP_FUN_INDEX;
break;
case kSet:
index = Context::JS_SET_FUN_INDEX;
break;
case kWeakMap:
index = Context::JS_WEAK_MAP_FUN_INDEX;
break;
case kWeakSet:
index = Context::JS_WEAK_SET_FUN_INDEX;
break;
}
return CAST(LoadContextElement(native_context, index));
}
TNode<JSFunction> BaseCollectionsAssembler::GetInitialAddFunction(
Variant variant, TNode<Context> native_context) {
int index;
switch (variant) {
case kMap:
index = Context::MAP_SET_INDEX;
break;
case kSet:
index = Context::SET_ADD_INDEX;
break;
case kWeakMap:
index = Context::WEAKMAP_SET_INDEX;
break;
case kWeakSet:
index = Context::WEAKSET_ADD_INDEX;
break;
}
return CAST(LoadContextElement(native_context, index));
}
int BaseCollectionsAssembler::GetTableOffset(Variant variant) {
switch (variant) {
case kMap:
return JSMap::kTableOffset;
case kSet:
return JSSet::kTableOffset;
case kWeakMap:
return JSWeakMap::kTableOffset;
case kWeakSet:
return JSWeakSet::kTableOffset;
}
UNREACHABLE();
}
TNode<IntPtrT> BaseCollectionsAssembler::EstimatedInitialSize(
TNode<Object> initial_entries, TNode<BoolT> is_fast_jsarray) {
return Select<IntPtrT>(
is_fast_jsarray,
[=] { return SmiUntag(LoadFastJSArrayLength(CAST(initial_entries))); },
[=] { return IntPtrConstant(0); });
}
void BaseCollectionsAssembler::GotoIfNotJSReceiver(Node* const obj,
Label* if_not_receiver) {
GotoIf(TaggedIsSmi(obj), if_not_receiver);
GotoIfNot(IsJSReceiver(obj), if_not_receiver);
}
TNode<Map> BaseCollectionsAssembler::GetInitialCollectionPrototype(
Variant variant, TNode<Context> native_context) {
int initial_prototype_index;
switch (variant) {
case kMap:
initial_prototype_index = Context::INITIAL_MAP_PROTOTYPE_MAP_INDEX;
break;
case kSet:
initial_prototype_index = Context::INITIAL_SET_PROTOTYPE_MAP_INDEX;
break;
case kWeakMap:
initial_prototype_index = Context::INITIAL_WEAKMAP_PROTOTYPE_MAP_INDEX;
break;
case kWeakSet:
initial_prototype_index = Context::INITIAL_WEAKSET_PROTOTYPE_MAP_INDEX;
break;
}
return CAST(LoadContextElement(native_context, initial_prototype_index));
}
TNode<BoolT> BaseCollectionsAssembler::HasInitialCollectionPrototype(
Variant variant, TNode<Context> native_context, TNode<Object> collection) {
TNode<Map> collection_proto_map =
LoadMap(LoadMapPrototype(LoadMap(CAST(collection))));
return TaggedEqual(collection_proto_map,
GetInitialCollectionPrototype(variant, native_context));
}
TNode<Object> BaseCollectionsAssembler::LoadAndNormalizeFixedArrayElement(
TNode<FixedArray> elements, TNode<IntPtrT> index) {
TNode<Object> element = UnsafeLoadFixedArrayElement(elements, index);
return Select<Object>(IsTheHole(element), [=] { return UndefinedConstant(); },
[=] { return element; });
}
TNode<Object> BaseCollectionsAssembler::LoadAndNormalizeFixedDoubleArrayElement(
TNode<HeapObject> elements, TNode<IntPtrT> index) {
TVARIABLE(Object, entry);
Label if_hole(this, Label::kDeferred), next(this);
TNode<Float64T> element =
LoadFixedDoubleArrayElement(CAST(elements), index, MachineType::Float64(),
0, INTPTR_PARAMETERS, &if_hole);
{ // not hole
entry = AllocateHeapNumberWithValue(element);
Goto(&next);
}
BIND(&if_hole);
{
entry = UndefinedConstant();
Goto(&next);
}
BIND(&next);
return entry.value();
}
class CollectionsBuiltinsAssembler : public BaseCollectionsAssembler {
public:
explicit CollectionsBuiltinsAssembler(compiler::CodeAssemblerState* state)
: BaseCollectionsAssembler(state) {}
// Check whether |iterable| is a JS_MAP_KEY_ITERATOR_TYPE or
// JS_MAP_VALUE_ITERATOR_TYPE object that is not partially consumed and still
// has original iteration behavior.
void BranchIfIterableWithOriginalKeyOrValueMapIterator(TNode<Object> iterable,
TNode<Context> context,
Label* if_true,
Label* if_false);
// Check whether |iterable| is a JS_SET_TYPE or JS_SET_VALUE_ITERATOR_TYPE
// object that still has original iteration behavior. In case of the iterator,
// the iterator also must not have been partially consumed.
void BranchIfIterableWithOriginalValueSetIterator(TNode<Object> iterable,
TNode<Context> context,
Label* if_true,
Label* if_false);
protected:
template <typename IteratorType>
Node* AllocateJSCollectionIterator(SloppyTNode<Context> context,
int map_index, Node* collection);
TNode<Object> AllocateTable(Variant variant, TNode<Context> context,
TNode<IntPtrT> at_least_space_for) override;
TNode<IntPtrT> GetHash(SloppyTNode<HeapObject> const key);
TNode<IntPtrT> CallGetHashRaw(SloppyTNode<HeapObject> const key);
TNode<Smi> CallGetOrCreateHashRaw(SloppyTNode<HeapObject> const key);
// Transitions the iterator to the non obsolete backing store.
// This is a NOP if the [table] is not obsolete.
using UpdateInTransition =
std::function<void(Node* const table, Node* const index)>;
template <typename TableType>
std::pair<TNode<TableType>, TNode<IntPtrT>> Transition(
TNode<TableType> const table, TNode<IntPtrT> const index,
UpdateInTransition const& update_in_transition);
template <typename IteratorType, typename TableType>
std::pair<TNode<TableType>, TNode<IntPtrT>> TransitionAndUpdate(
TNode<IteratorType> const iterator);
template <typename TableType>
std::tuple<TNode<Object>, TNode<IntPtrT>, TNode<IntPtrT>> NextSkipHoles(
TNode<TableType> table, TNode<IntPtrT> index, Label* if_end);
// Specialization for Smi.
// The {result} variable will contain the entry index if the key was found,
// or the hash code otherwise.
template <typename CollectionType>
void FindOrderedHashTableEntryForSmiKey(Node* table,
SloppyTNode<Smi> key_tagged,
Variable* result, Label* entry_found,
Label* not_found);
void SameValueZeroSmi(SloppyTNode<Smi> key_smi,
SloppyTNode<Object> candidate_key, Label* if_same,
Label* if_not_same);
// Specialization for heap numbers.
// The {result} variable will contain the entry index if the key was found,
// or the hash code otherwise.
void SameValueZeroHeapNumber(SloppyTNode<Float64T> key_float,
SloppyTNode<Object> candidate_key,
Label* if_same, Label* if_not_same);
template <typename CollectionType>
void FindOrderedHashTableEntryForHeapNumberKey(
SloppyTNode<Context> context, Node* table,
SloppyTNode<HeapNumber> key_heap_number, Variable* result,
Label* entry_found, Label* not_found);
// Specialization for bigints.
// The {result} variable will contain the entry index if the key was found,
// or the hash code otherwise.
void SameValueZeroBigInt(Node* key, Node* candidate_key, Label* if_same,
Label* if_not_same);
template <typename CollectionType>
void FindOrderedHashTableEntryForBigIntKey(SloppyTNode<Context> context,
Node* table, Node* key,
Variable* result,
Label* entry_found,
Label* not_found);
// Specialization for string.
// The {result} variable will contain the entry index if the key was found,
// or the hash code otherwise.
template <typename CollectionType>
void FindOrderedHashTableEntryForStringKey(
SloppyTNode<Context> context, Node* table, SloppyTNode<String> key_tagged,
Variable* result, Label* entry_found, Label* not_found);
TNode<IntPtrT> ComputeStringHash(TNode<Context> context,
TNode<String> string_key);
void SameValueZeroString(SloppyTNode<Context> context,
SloppyTNode<String> key_string,
SloppyTNode<Object> candidate_key, Label* if_same,
Label* if_not_same);
// Specialization for non-strings, non-numbers. For those we only need
// reference equality to compare the keys.
// The {result} variable will contain the entry index if the key was found,
// or the hash code otherwise. If the hash-code has not been computed, it
// should be Smi -1.
template <typename CollectionType>
void FindOrderedHashTableEntryForOtherKey(
SloppyTNode<Context> context, Node* table, SloppyTNode<HeapObject> key,
Variable* result, Label* entry_found, Label* not_found);
template <typename CollectionType>
void TryLookupOrderedHashTableIndex(Node* const table, Node* const key,
Node* const context, Variable* result,
Label* if_entry_found,
Label* if_not_found);
Node* NormalizeNumberKey(Node* key);
void StoreOrderedHashMapNewEntry(TNode<OrderedHashMap> const table,
Node* const key, Node* const value,
Node* const hash,
Node* const number_of_buckets,
Node* const occupancy);
void StoreOrderedHashSetNewEntry(TNode<OrderedHashSet> const table,
Node* const key, Node* const hash,
Node* const number_of_buckets,
Node* const occupancy);
// Create a JSArray with PACKED_ELEMENTS kind from a Map.prototype.keys() or
// Map.prototype.values() iterator. The iterator is assumed to satisfy
// IterableWithOriginalKeyOrValueMapIterator. This function will skip the
// iterator and iterate directly on the underlying hash table. In the end it
// will update the state of the iterator to 'exhausted'.
TNode<JSArray> MapIteratorToList(TNode<Context> context,
TNode<JSMapIterator> iterator);
// Create a JSArray with PACKED_ELEMENTS kind from a Set.prototype.keys() or
// Set.prototype.values() iterator, or a Set. The |iterable| is assumed to
// satisfy IterableWithOriginalValueSetIterator. This function will skip the
// iterator and iterate directly on the underlying hash table. In the end, if
// |iterable| is an iterator, it will update the state of the iterator to
// 'exhausted'.
TNode<JSArray> SetOrSetIteratorToList(TNode<Context> context,
TNode<Object> iterable);
void BranchIfMapIteratorProtectorValid(Label* if_true, Label* if_false);
void BranchIfSetIteratorProtectorValid(Label* if_true, Label* if_false);
};
template <typename IteratorType>
Node* CollectionsBuiltinsAssembler::AllocateJSCollectionIterator(
SloppyTNode<Context> context, int map_index, Node* collection) {
TNode<Object> const table =
LoadObjectField(collection, JSCollection::kTableOffset);
TNode<NativeContext> const native_context = LoadNativeContext(context);
TNode<Object> const iterator_map =
LoadContextElement(native_context, map_index);
TNode<HeapObject> const iterator = AllocateInNewSpace(IteratorType::kSize);
StoreMapNoWriteBarrier(iterator, iterator_map);
StoreObjectFieldRoot(iterator, IteratorType::kPropertiesOrHashOffset,
RootIndex::kEmptyFixedArray);
StoreObjectFieldRoot(iterator, IteratorType::kElementsOffset,
RootIndex::kEmptyFixedArray);
StoreObjectFieldNoWriteBarrier(iterator, IteratorType::kTableOffset, table);
StoreObjectFieldNoWriteBarrier(iterator, IteratorType::kIndexOffset,
SmiConstant(0));
return iterator;
}
TNode<Object> CollectionsBuiltinsAssembler::AllocateTable(
Variant variant, TNode<Context> context,
TNode<IntPtrT> at_least_space_for) {
return CAST((variant == kMap || variant == kWeakMap)
? AllocateOrderedHashTable<OrderedHashMap>()
: AllocateOrderedHashTable<OrderedHashSet>());
}
TF_BUILTIN(MapConstructor, CollectionsBuiltinsAssembler) {
TNode<Object> new_target = CAST(Parameter(Descriptor::kJSNewTarget));
TNode<IntPtrT> argc =
ChangeInt32ToIntPtr(Parameter(Descriptor::kJSActualArgumentsCount));
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
GenerateConstructor(kMap, isolate()->factory()->Map_string(), new_target,
argc, context);
}
TF_BUILTIN(SetConstructor, CollectionsBuiltinsAssembler) {
TNode<Object> new_target = CAST(Parameter(Descriptor::kJSNewTarget));
TNode<IntPtrT> argc =
ChangeInt32ToIntPtr(Parameter(Descriptor::kJSActualArgumentsCount));
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
GenerateConstructor(kSet, isolate()->factory()->Set_string(), new_target,
argc, context);
}
TNode<Smi> CollectionsBuiltinsAssembler::CallGetOrCreateHashRaw(
SloppyTNode<HeapObject> const key) {
TNode<ExternalReference> const function_addr =
ExternalConstant(ExternalReference::get_or_create_hash_raw());
TNode<ExternalReference> const isolate_ptr =
ExternalConstant(ExternalReference::isolate_address(isolate()));
MachineType type_ptr = MachineType::Pointer();
MachineType type_tagged = MachineType::AnyTagged();
Node* const result = CallCFunction(function_addr, type_tagged,
std::make_pair(type_ptr, isolate_ptr),
std::make_pair(type_tagged, key));
return CAST(result);
}
TNode<IntPtrT> CollectionsBuiltinsAssembler::CallGetHashRaw(
SloppyTNode<HeapObject> const key) {
TNode<ExternalReference> const function_addr =
ExternalConstant(ExternalReference::orderedhashmap_gethash_raw());
TNode<ExternalReference> const isolate_ptr =
ExternalConstant(ExternalReference::isolate_address(isolate()));
MachineType type_ptr = MachineType::Pointer();
MachineType type_tagged = MachineType::AnyTagged();
Node* const result = CallCFunction(function_addr, type_tagged,
std::make_pair(type_ptr, isolate_ptr),
std::make_pair(type_tagged, key));
return SmiUntag(result);
}
TNode<IntPtrT> CollectionsBuiltinsAssembler::GetHash(
SloppyTNode<HeapObject> const key) {
TVARIABLE(IntPtrT, var_hash);
Label if_receiver(this), if_other(this), done(this);
Branch(IsJSReceiver(key), &if_receiver, &if_other);
BIND(&if_receiver);
{
var_hash = LoadJSReceiverIdentityHash(key);
Goto(&done);
}
BIND(&if_other);
{
var_hash = CallGetHashRaw(key);
Goto(&done);
}
BIND(&done);
return var_hash.value();
}
void CollectionsBuiltinsAssembler::SameValueZeroSmi(
SloppyTNode<Smi> key_smi, SloppyTNode<Object> candidate_key, Label* if_same,
Label* if_not_same) {
// If the key is the same, we are done.
GotoIf(TaggedEqual(candidate_key, key_smi), if_same);
// If the candidate key is smi, then it must be different (because
// we already checked for equality above).
GotoIf(TaggedIsSmi(candidate_key), if_not_same);
// If the candidate key is not smi, we still have to check if it is a
// heap number with the same value.
GotoIfNot(IsHeapNumber(CAST(candidate_key)), if_not_same);
TNode<Float64T> const candidate_key_number =
LoadHeapNumberValue(CAST(candidate_key));
TNode<Float64T> const key_number = SmiToFloat64(key_smi);
GotoIf(Float64Equal(candidate_key_number, key_number), if_same);
Goto(if_not_same);
}
void CollectionsBuiltinsAssembler::BranchIfMapIteratorProtectorValid(
Label* if_true, Label* if_false) {
TNode<PropertyCell> protector_cell = MapIteratorProtectorConstant();
DCHECK(isolate()->heap()->map_iterator_protector().IsPropertyCell());
Branch(
TaggedEqual(LoadObjectField(protector_cell, PropertyCell::kValueOffset),
SmiConstant(Isolate::kProtectorValid)),
if_true, if_false);
}
void CollectionsBuiltinsAssembler::
BranchIfIterableWithOriginalKeyOrValueMapIterator(TNode<Object> iterator,
TNode<Context> context,
Label* if_true,
Label* if_false) {
Label if_key_or_value_iterator(this), extra_checks(this);
// Check if iterator is a keys or values JSMapIterator.
GotoIf(TaggedIsSmi(iterator), if_false);
TNode<Map> iter_map = LoadMap(CAST(iterator));
TNode<Uint16T> const instance_type = LoadMapInstanceType(iter_map);
GotoIf(InstanceTypeEqual(instance_type, JS_MAP_KEY_ITERATOR_TYPE),
&if_key_or_value_iterator);
Branch(InstanceTypeEqual(instance_type, JS_MAP_VALUE_ITERATOR_TYPE),
&if_key_or_value_iterator, if_false);
BIND(&if_key_or_value_iterator);
// Check that the iterator is not partially consumed.
TNode<Object> const index =
LoadObjectField(CAST(iterator), JSMapIterator::kIndexOffset);
GotoIfNot(TaggedEqual(index, SmiConstant(0)), if_false);
BranchIfMapIteratorProtectorValid(&extra_checks, if_false);
BIND(&extra_checks);
// Check if the iterator object has the original %MapIteratorPrototype%.
TNode<NativeContext> const native_context = LoadNativeContext(context);
TNode<Object> const initial_map_iter_proto = LoadContextElement(
native_context, Context::INITIAL_MAP_ITERATOR_PROTOTYPE_INDEX);
TNode<HeapObject> const map_iter_proto = LoadMapPrototype(iter_map);
GotoIfNot(TaggedEqual(map_iter_proto, initial_map_iter_proto), if_false);
// Check if the original MapIterator prototype has the original
// %IteratorPrototype%.
TNode<Object> const initial_iter_proto = LoadContextElement(
native_context, Context::INITIAL_ITERATOR_PROTOTYPE_INDEX);
TNode<HeapObject> const iter_proto =
LoadMapPrototype(LoadMap(map_iter_proto));
Branch(TaggedEqual(iter_proto, initial_iter_proto), if_true, if_false);
}
void BranchIfIterableWithOriginalKeyOrValueMapIterator(
compiler::CodeAssemblerState* state, TNode<Object> iterable,
TNode<Context> context, compiler::CodeAssemblerLabel* if_true,
compiler::CodeAssemblerLabel* if_false) {
CollectionsBuiltinsAssembler assembler(state);
assembler.BranchIfIterableWithOriginalKeyOrValueMapIterator(
iterable, context, if_true, if_false);
}
void CollectionsBuiltinsAssembler::BranchIfSetIteratorProtectorValid(
Label* if_true, Label* if_false) {
TNode<PropertyCell> const protector_cell = SetIteratorProtectorConstant();
DCHECK(isolate()->heap()->set_iterator_protector().IsPropertyCell());
Branch(
TaggedEqual(LoadObjectField(protector_cell, PropertyCell::kValueOffset),
SmiConstant(Isolate::kProtectorValid)),
if_true, if_false);
}
void CollectionsBuiltinsAssembler::BranchIfIterableWithOriginalValueSetIterator(
TNode<Object> iterable, TNode<Context> context, Label* if_true,
Label* if_false) {
Label if_set(this), if_value_iterator(this), check_protector(this);
TVARIABLE(BoolT, var_result);
GotoIf(TaggedIsSmi(iterable), if_false);
TNode<Map> iterable_map = LoadMap(CAST(iterable));
TNode<Uint16T> const instance_type = LoadMapInstanceType(iterable_map);
GotoIf(InstanceTypeEqual(instance_type, JS_SET_TYPE), &if_set);
Branch(InstanceTypeEqual(instance_type, JS_SET_VALUE_ITERATOR_TYPE),
&if_value_iterator, if_false);
BIND(&if_set);
// Check if the set object has the original Set prototype.
TNode<Object> const initial_set_proto = LoadContextElement(
LoadNativeContext(context), Context::INITIAL_SET_PROTOTYPE_INDEX);
TNode<HeapObject> const set_proto = LoadMapPrototype(iterable_map);
GotoIfNot(TaggedEqual(set_proto, initial_set_proto), if_false);
Goto(&check_protector);
BIND(&if_value_iterator);
// Check that the iterator is not partially consumed.
TNode<Object> const index =
LoadObjectField(CAST(iterable), JSSetIterator::kIndexOffset);
GotoIfNot(TaggedEqual(index, SmiConstant(0)), if_false);
// Check if the iterator object has the original SetIterator prototype.
TNode<NativeContext> const native_context = LoadNativeContext(context);
TNode<Object> const initial_set_iter_proto = LoadContextElement(
native_context, Context::INITIAL_SET_ITERATOR_PROTOTYPE_INDEX);
TNode<HeapObject> const set_iter_proto = LoadMapPrototype(iterable_map);
GotoIfNot(TaggedEqual(set_iter_proto, initial_set_iter_proto), if_false);
// Check if the original SetIterator prototype has the original
// %IteratorPrototype%.
TNode<Object> const initial_iter_proto = LoadContextElement(
native_context, Context::INITIAL_ITERATOR_PROTOTYPE_INDEX);
TNode<HeapObject> const iter_proto =
LoadMapPrototype(LoadMap(set_iter_proto));
GotoIfNot(TaggedEqual(iter_proto, initial_iter_proto), if_false);
Goto(&check_protector);
BIND(&check_protector);
BranchIfSetIteratorProtectorValid(if_true, if_false);
}
void BranchIfIterableWithOriginalValueSetIterator(
compiler::CodeAssemblerState* state, TNode<Object> iterable,
TNode<Context> context, compiler::CodeAssemblerLabel* if_true,
compiler::CodeAssemblerLabel* if_false) {
CollectionsBuiltinsAssembler assembler(state);
assembler.BranchIfIterableWithOriginalValueSetIterator(iterable, context,
if_true, if_false);
}
TNode<JSArray> CollectionsBuiltinsAssembler::MapIteratorToList(
TNode<Context> context, TNode<JSMapIterator> iterator) {
// Transition the {iterator} table if necessary.
TNode<OrderedHashMap> table;
TNode<IntPtrT> index;
std::tie(table, index) =
TransitionAndUpdate<JSMapIterator, OrderedHashMap>(iterator);
CSA_ASSERT(this, IntPtrEqual(index, IntPtrConstant(0)));
TNode<IntPtrT> size =
LoadAndUntagObjectField(table, OrderedHashMap::NumberOfElementsOffset());
const ElementsKind kind = PACKED_ELEMENTS;
TNode<Map> array_map =
LoadJSArrayElementsMap(kind, LoadNativeContext(context));
TNode<JSArray> array =
AllocateJSArray(kind, array_map, size, SmiTag(size), nullptr,
INTPTR_PARAMETERS, kAllowLargeObjectAllocation);
TNode<FixedArray> elements = CAST(LoadElements(array));
const int first_element_offset = FixedArray::kHeaderSize - kHeapObjectTag;
TNode<IntPtrT> first_to_element_offset =
ElementOffsetFromIndex(IntPtrConstant(0), kind, INTPTR_PARAMETERS, 0);
VARIABLE(
var_offset, MachineType::PointerRepresentation(),
IntPtrAdd(first_to_element_offset, IntPtrConstant(first_element_offset)));
TVARIABLE(IntPtrT, var_index, index);
VariableList vars({&var_index, &var_offset}, zone());
Label done(this, {&var_index}), loop(this, vars), continue_loop(this, vars),
write_key(this, vars), write_value(this, vars);
Goto(&loop);
BIND(&loop);
{
// Read the next entry from the {table}, skipping holes.
TNode<Object> entry_key;
TNode<IntPtrT> entry_start_position;
TNode<IntPtrT> cur_index;
std::tie(entry_key, entry_start_position, cur_index) =
NextSkipHoles<OrderedHashMap>(table, var_index.value(), &done);
// Decide to write key or value.
Branch(
InstanceTypeEqual(LoadInstanceType(iterator), JS_MAP_KEY_ITERATOR_TYPE),
&write_key, &write_value);
BIND(&write_key);
{
Store(elements, var_offset.value(), entry_key);
Goto(&continue_loop);
}
BIND(&write_value);
{
CSA_ASSERT(this, InstanceTypeEqual(LoadInstanceType(iterator),
JS_MAP_VALUE_ITERATOR_TYPE));
TNode<Object> entry_value =
UnsafeLoadFixedArrayElement(table, entry_start_position,
(OrderedHashMap::HashTableStartIndex() +
OrderedHashMap::kValueOffset) *
kTaggedSize);
Store(elements, var_offset.value(), entry_value);
Goto(&continue_loop);
}
BIND(&continue_loop);
{
// Increment the array offset and continue the loop to the next entry.
var_index = cur_index;
var_offset.Bind(
IntPtrAdd(var_offset.value(), IntPtrConstant(kTaggedSize)));
Goto(&loop);
}
}
BIND(&done);
// Set the {iterator} to exhausted.
StoreObjectFieldRoot(iterator, JSMapIterator::kTableOffset,
RootIndex::kEmptyOrderedHashMap);
StoreObjectFieldNoWriteBarrier(iterator, JSMapIterator::kIndexOffset,
SmiTag(var_index.value()));
return UncheckedCast<JSArray>(array);
}
TF_BUILTIN(MapIteratorToList, CollectionsBuiltinsAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<JSMapIterator> iterator = CAST(Parameter(Descriptor::kSource));
Return(MapIteratorToList(context, iterator));
}
TNode<JSArray> CollectionsBuiltinsAssembler::SetOrSetIteratorToList(
TNode<Context> context, TNode<Object> iterable) {
TVARIABLE(OrderedHashSet, var_table);
Label if_set(this), if_iterator(this), copy(this);
TNode<Uint16T> const instance_type = LoadInstanceType(CAST(iterable));
Branch(InstanceTypeEqual(instance_type, JS_SET_TYPE), &if_set, &if_iterator);
BIND(&if_set);
{
// {iterable} is a JSSet.
var_table = CAST(LoadObjectField(CAST(iterable), JSSet::kTableOffset));
Goto(©);
}
BIND(&if_iterator);
{
// {iterable} is a JSSetIterator.
// Transition the {iterable} table if necessary.
TNode<OrderedHashSet> iter_table;
TNode<IntPtrT> iter_index;
std::tie(iter_table, iter_index) =
TransitionAndUpdate<JSSetIterator, OrderedHashSet>(CAST(iterable));
CSA_ASSERT(this, IntPtrEqual(iter_index, IntPtrConstant(0)));
var_table = iter_table;
Goto(©);
}
BIND(©);
TNode<OrderedHashSet> table = var_table.value();
TNode<IntPtrT> size =
LoadAndUntagObjectField(table, OrderedHashMap::NumberOfElementsOffset());
const ElementsKind kind = PACKED_ELEMENTS;
TNode<Map> array_map =
LoadJSArrayElementsMap(kind, LoadNativeContext(context));
TNode<JSArray> array =
AllocateJSArray(kind, array_map, size, SmiTag(size), nullptr,
INTPTR_PARAMETERS, kAllowLargeObjectAllocation);
TNode<FixedArray> elements = CAST(LoadElements(array));
const int first_element_offset = FixedArray::kHeaderSize - kHeapObjectTag;
TNode<IntPtrT> first_to_element_offset =
ElementOffsetFromIndex(IntPtrConstant(0), kind, INTPTR_PARAMETERS, 0);
VARIABLE(
var_offset, MachineType::PointerRepresentation(),
IntPtrAdd(first_to_element_offset, IntPtrConstant(first_element_offset)));
TVARIABLE(IntPtrT, var_index, IntPtrConstant(0));
Label done(this), finalize(this, {&var_index}),
loop(this, {&var_index, &var_offset});
Goto(&loop);
BIND(&loop);
{
// Read the next entry from the {table}, skipping holes.
TNode<Object> entry_key;
TNode<IntPtrT> entry_start_position;
TNode<IntPtrT> cur_index;
std::tie(entry_key, entry_start_position, cur_index) =
NextSkipHoles<OrderedHashSet>(table, var_index.value(), &finalize);
Store(elements, var_offset.value(), entry_key);
var_index = cur_index;
var_offset.Bind(IntPtrAdd(var_offset.value(), IntPtrConstant(kTaggedSize)));
Goto(&loop);
}
BIND(&finalize);
GotoIf(InstanceTypeEqual(instance_type, JS_SET_TYPE), &done);
// Set the {iterable} to exhausted if it's an iterator.
StoreObjectFieldRoot(iterable, JSSetIterator::kTableOffset,
RootIndex::kEmptyOrderedHashSet);
StoreObjectFieldNoWriteBarrier(iterable, JSSetIterator::kIndexOffset,
SmiTag(var_index.value()));
Goto(&done);
BIND(&done);
return UncheckedCast<JSArray>(array);
}
TF_BUILTIN(SetOrSetIteratorToList, CollectionsBuiltinsAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<Object> object = CAST(Parameter(Descriptor::kSource));
Return(SetOrSetIteratorToList(context, object));
}
template <typename CollectionType>
void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForSmiKey(
Node* table, SloppyTNode<Smi> smi_key, Variable* result, Label* entry_found,
Label* not_found) {
TNode<IntPtrT> const key_untagged = SmiUntag(smi_key);
TNode<IntPtrT> const hash =
ChangeInt32ToIntPtr(ComputeUnseededHash(key_untagged));
CSA_ASSERT(this, IntPtrGreaterThanOrEqual(hash, IntPtrConstant(0)));
result->Bind(hash);
FindOrderedHashTableEntry<CollectionType>(
table, hash,
[&](TNode<Object> other_key, Label* if_same, Label* if_not_same) {
SameValueZeroSmi(smi_key, other_key, if_same, if_not_same);
},
result, entry_found, not_found);
}
template <typename CollectionType>
void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForStringKey(
SloppyTNode<Context> context, Node* table, SloppyTNode<String> key_tagged,
Variable* result, Label* entry_found, Label* not_found) {
TNode<IntPtrT> const hash = ComputeStringHash(context, key_tagged);
CSA_ASSERT(this, IntPtrGreaterThanOrEqual(hash, IntPtrConstant(0)));
result->Bind(hash);
FindOrderedHashTableEntry<CollectionType>(
table, hash,
[&](TNode<Object> other_key, Label* if_same, Label* if_not_same) {
SameValueZeroString(context, key_tagged, other_key, if_same,
if_not_same);
},
result, entry_found, not_found);
}
template <typename CollectionType>
void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForHeapNumberKey(
SloppyTNode<Context> context, Node* table,
SloppyTNode<HeapNumber> key_heap_number, Variable* result,
Label* entry_found, Label* not_found) {
TNode<IntPtrT> const hash = CallGetHashRaw(key_heap_number);
CSA_ASSERT(this, IntPtrGreaterThanOrEqual(hash, IntPtrConstant(0)));
result->Bind(hash);
TNode<Float64T> const key_float = LoadHeapNumberValue(key_heap_number);
FindOrderedHashTableEntry<CollectionType>(
table, hash,
[&](TNode<Object> other_key, Label* if_same, Label* if_not_same) {
SameValueZeroHeapNumber(key_float, other_key, if_same, if_not_same);
},
result, entry_found, not_found);
}
template <typename CollectionType>
void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForBigIntKey(
SloppyTNode<Context> context, Node* table, Node* key, Variable* result,
Label* entry_found, Label* not_found) {
TNode<IntPtrT> const hash = CallGetHashRaw(key);
CSA_ASSERT(this, IntPtrGreaterThanOrEqual(hash, IntPtrConstant(0)));
result->Bind(hash);
FindOrderedHashTableEntry<CollectionType>(
table, hash,
[&](TNode<Object> other_key, Label* if_same, Label* if_not_same) {
SameValueZeroBigInt(key, other_key, if_same, if_not_same);
},
result, entry_found, not_found);
}
template <typename CollectionType>
void CollectionsBuiltinsAssembler::FindOrderedHashTableEntryForOtherKey(
SloppyTNode<Context> context, Node* table, SloppyTNode<HeapObject> key,
Variable* result, Label* entry_found, Label* not_found) {
TNode<IntPtrT> const hash = GetHash(key);
CSA_ASSERT(this, IntPtrGreaterThanOrEqual(hash, IntPtrConstant(0)));
result->Bind(hash);
FindOrderedHashTableEntry<CollectionType>(
table, hash,
[&](TNode<Object> other_key, Label* if_same, Label* if_not_same) {
Branch(TaggedEqual(key, other_key), if_same, if_not_same);
},
result, entry_found, not_found);
}
TNode<IntPtrT> CollectionsBuiltinsAssembler::ComputeStringHash(
TNode<Context> context, TNode<String> string_key) {
TVARIABLE(IntPtrT, var_result);
Label hash_not_computed(this), done(this, &var_result);
TNode<IntPtrT> const hash =
ChangeInt32ToIntPtr(LoadNameHash(string_key, &hash_not_computed));
var_result = hash;
Goto(&done);
BIND(&hash_not_computed);
var_result = CallGetHashRaw(string_key);
Goto(&done);
BIND(&done);
return var_result.value();
}
void CollectionsBuiltinsAssembler::SameValueZeroString(
SloppyTNode<Context> context, SloppyTNode<String> key_string,
SloppyTNode<Object> candidate_key, Label* if_same, Label* if_not_same) {
// If the candidate is not a string, the keys are not equal.
GotoIf(TaggedIsSmi(candidate_key), if_not_same);
GotoIfNot(IsString(CAST(candidate_key)), if_not_same);
Branch(TaggedEqual(CallBuiltin(Builtins::kStringEqual, context, key_string,
candidate_key),
TrueConstant()),
if_same, if_not_same);
}
void CollectionsBuiltinsAssembler::SameValueZeroBigInt(Node* key,
Node* candidate_key,
Label* if_same,
Label* if_not_same) {
CSA_ASSERT(this, IsBigInt(key));
GotoIf(TaggedIsSmi(candidate_key), if_not_same);
GotoIfNot(IsBigInt(candidate_key), if_not_same);
Branch(TaggedEqual(CallRuntime(Runtime::kBigIntEqualToBigInt,
NoContextConstant(), key, candidate_key),
TrueConstant()),
if_same, if_not_same);
}
void CollectionsBuiltinsAssembler::SameValueZeroHeapNumber(
SloppyTNode<Float64T> key_float, SloppyTNode<Object> candidate_key,
Label* if_same, Label* if_not_same) {
Label if_smi(this), if_keyisnan(this);
GotoIf(TaggedIsSmi(candidate_key), &if_smi);
GotoIfNot(IsHeapNumber(CAST(candidate_key)), if_not_same);
{
// {candidate_key} is a heap number.
TNode<Float64T> const candidate_float =
LoadHeapNumberValue(CAST(candidate_key));
GotoIf(Float64Equal(key_float, candidate_float), if_same);
// SameValueZero needs to treat NaNs as equal. First check if {key_float}
// is NaN.
BranchIfFloat64IsNaN(key_float, &if_keyisnan, if_not_same);
BIND(&if_keyisnan);
{
// Return true iff {candidate_key} is NaN.
Branch(Float64Equal(candidate_float, candidate_float), if_not_same,
if_same);
}
}
BIND(&if_smi);
{
TNode<Float64T> const candidate_float = SmiToFloat64(CAST(candidate_key));
Branch(Float64Equal(key_float, candidate_float), if_same, if_not_same);
}
}
TF_BUILTIN(OrderedHashTableHealIndex, CollectionsBuiltinsAssembler) {
TNode<HeapObject> table = CAST(Parameter(Descriptor::kTable));
TNode<Smi> index = CAST(Parameter(Descriptor::kIndex));
Label return_index(this), return_zero(this);
// Check if we need to update the {index}.
GotoIfNot(SmiLessThan(SmiConstant(0), index), &return_zero);
// Check if the {table} was cleared.
STATIC_ASSERT(OrderedHashMap::NumberOfDeletedElementsOffset() ==
OrderedHashSet::NumberOfDeletedElementsOffset());
TNode<IntPtrT> number_of_deleted_elements = LoadAndUntagObjectField(
table, OrderedHashMap::NumberOfDeletedElementsOffset());
STATIC_ASSERT(OrderedHashMap::kClearedTableSentinel ==
OrderedHashSet::kClearedTableSentinel);
GotoIf(IntPtrEqual(number_of_deleted_elements,
IntPtrConstant(OrderedHashMap::kClearedTableSentinel)),
&return_zero);
VARIABLE(var_i, MachineType::PointerRepresentation(), IntPtrConstant(0));
VARIABLE(var_index, MachineRepresentation::kTagged, index);
Label loop(this, {&var_i, &var_index});
Goto(&loop);
BIND(&loop);
{
Node* i = var_i.value();
GotoIfNot(IntPtrLessThan(i, number_of_deleted_elements), &return_index);
STATIC_ASSERT(OrderedHashMap::RemovedHolesIndex() ==
OrderedHashSet::RemovedHolesIndex());
TNode<Smi> removed_index = CAST(LoadFixedArrayElement(
CAST(table), i, OrderedHashMap::RemovedHolesIndex() * kTaggedSize));
GotoIf(SmiGreaterThanOrEqual(removed_index, index), &return_index);
Decrement(&var_index, 1, SMI_PARAMETERS);
Increment(&var_i);
Goto(&loop);
}
BIND(&return_index);
Return(var_index.value());
BIND(&return_zero);
Return(SmiConstant(0));
}
template <typename TableType>
std::pair<TNode<TableType>, TNode<IntPtrT>>
CollectionsBuiltinsAssembler::Transition(
TNode<TableType> const table, TNode<IntPtrT> const index,
UpdateInTransition const& update_in_transition) {
TVARIABLE(IntPtrT, var_index, index);
TVARIABLE(TableType, var_table, table);
Label if_done(this), if_transition(this, Label::kDeferred);
Branch(TaggedIsSmi(
LoadObjectField(var_table.value(), TableType::NextTableOffset())),
&if_done, &if_transition);
BIND(&if_transition);
{
Label loop(this, {&var_table, &var_index}), done_loop(this);
Goto(&loop);
BIND(&loop);
{
TNode<TableType> table = var_table.value();
TNode<IntPtrT> index = var_index.value();
TNode<Object> next_table =
LoadObjectField(table, TableType::NextTableOffset());
GotoIf(TaggedIsSmi(next_table), &done_loop);
var_table = CAST(next_table);
var_index = SmiUntag(
CAST(CallBuiltin(Builtins::kOrderedHashTableHealIndex,
NoContextConstant(), table, SmiTag(index))));
Goto(&loop);
}
BIND(&done_loop);
// Update with the new {table} and {index}.
update_in_transition(var_table.value(), var_index.value());
Goto(&if_done);
}
BIND(&if_done);
return {var_table.value(), var_index.value()};
}
template <typename IteratorType, typename TableType>
std::pair<TNode<TableType>, TNode<IntPtrT>>
CollectionsBuiltinsAssembler::TransitionAndUpdate(
TNode<IteratorType> const iterator) {
return Transition<TableType>(
CAST(LoadObjectField(iterator, IteratorType::kTableOffset)),
LoadAndUntagObjectField(iterator, IteratorType::kIndexOffset),
[this, iterator](Node* const table, Node* const index) {
// Update the {iterator} with the new state.
StoreObjectField(iterator, IteratorType::kTableOffset, table);
StoreObjectFieldNoWriteBarrier(iterator, IteratorType::kIndexOffset,
SmiTag(index));
});
}
template <typename TableType>
std::tuple<TNode<Object>, TNode<IntPtrT>, TNode<IntPtrT>>
CollectionsBuiltinsAssembler::NextSkipHoles(TNode<TableType> table,
TNode<IntPtrT> index,
Label* if_end) {
// Compute the used capacity for the {table}.
TNode<IntPtrT> number_of_buckets =
LoadAndUntagObjectField(table, TableType::NumberOfBucketsOffset());
TNode<IntPtrT> number_of_elements =
LoadAndUntagObjectField(table, TableType::NumberOfElementsOffset());
TNode<IntPtrT> number_of_deleted_elements = LoadAndUntagObjectField(
table, TableType::NumberOfDeletedElementsOffset());
TNode<IntPtrT> used_capacity =
IntPtrAdd(number_of_elements, number_of_deleted_elements);
TNode<Object> entry_key;
TNode<IntPtrT> entry_start_position;
TVARIABLE(IntPtrT, var_index, index);
Label loop(this, &var_index), done_loop(this);
Goto(&loop);
BIND(&loop);
{
GotoIfNot(IntPtrLessThan(var_index.value(), used_capacity), if_end);
entry_start_position = IntPtrAdd(
IntPtrMul(var_index.value(), IntPtrConstant(TableType::kEntrySize)),
number_of_buckets);
entry_key = UnsafeLoadFixedArrayElement(
table, entry_start_position,
TableType::HashTableStartIndex() * kTaggedSize);
Increment(&var_index);
Branch(IsTheHole(entry_key), &loop, &done_loop);
}
BIND(&done_loop);
return std::tuple<TNode<Object>, TNode<IntPtrT>, TNode<IntPtrT>>{
entry_key, entry_start_position, var_index.value()};
}
TF_BUILTIN(MapPrototypeGet, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE, "Map.prototype.get");
TNode<Object> const table = LoadObjectField(receiver, JSMap::kTableOffset);
TNode<Smi> index = CAST(
CallBuiltin(Builtins::kFindOrderedHashMapEntry, context, table, key));
Label if_found(this), if_not_found(this);
Branch(SmiGreaterThanOrEqual(index, SmiConstant(0)), &if_found,
&if_not_found);
BIND(&if_found);
Return(LoadFixedArrayElement(
CAST(table), SmiUntag(index),
(OrderedHashMap::HashTableStartIndex() + OrderedHashMap::kValueOffset) *
kTaggedSize));
BIND(&if_not_found);
Return(UndefinedConstant());
}
TF_BUILTIN(MapPrototypeHas, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE, "Map.prototype.has");
TNode<Object> const table = LoadObjectField(receiver, JSMap::kTableOffset);
TNode<Smi> index = CAST(
CallBuiltin(Builtins::kFindOrderedHashMapEntry, context, table, key));
Label if_found(this), if_not_found(this);
Branch(SmiGreaterThanOrEqual(index, SmiConstant(0)), &if_found,
&if_not_found);
BIND(&if_found);
Return(TrueConstant());
BIND(&if_not_found);
Return(FalseConstant());
}
Node* CollectionsBuiltinsAssembler::NormalizeNumberKey(Node* const key) {
VARIABLE(result, MachineRepresentation::kTagged, key);
Label done(this);
GotoIf(TaggedIsSmi(key), &done);
GotoIfNot(IsHeapNumber(key), &done);
TNode<Float64T> const number = LoadHeapNumberValue(key);
GotoIfNot(Float64Equal(number, Float64Constant(0.0)), &done);
// We know the value is zero, so we take the key to be Smi 0.
// Another option would be to normalize to Smi here.
result.Bind(SmiConstant(0));
Goto(&done);
BIND(&done);
return result.value();
}
TF_BUILTIN(MapPrototypeSet, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* key = Parameter(Descriptor::kKey);
Node* const value = Parameter(Descriptor::kValue);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE, "Map.prototype.set");
key = NormalizeNumberKey(key);
TNode<OrderedHashMap> const table =
CAST(LoadObjectField(receiver, JSMap::kTableOffset));
VARIABLE(entry_start_position_or_hash, MachineType::PointerRepresentation(),
IntPtrConstant(0));
Label entry_found(this), not_found(this);
TryLookupOrderedHashTableIndex<OrderedHashMap>(table, key, context,
&entry_start_position_or_hash,
&entry_found, ¬_found);
BIND(&entry_found);
// If we found the entry, we just store the value there.
StoreFixedArrayElement(table, entry_start_position_or_hash.value(), value,
UPDATE_WRITE_BARRIER,
kTaggedSize * (OrderedHashMap::HashTableStartIndex() +
OrderedHashMap::kValueOffset));
Return(receiver);
Label no_hash(this), add_entry(this), store_new_entry(this);
BIND(¬_found);
{
// If we have a hash code, we can start adding the new entry.
GotoIf(IntPtrGreaterThan(entry_start_position_or_hash.value(),
IntPtrConstant(0)),
&add_entry);
// Otherwise, go to runtime to compute the hash code.
entry_start_position_or_hash.Bind(SmiUntag(CallGetOrCreateHashRaw(key)));
Goto(&add_entry);
}
BIND(&add_entry);
VARIABLE(number_of_buckets, MachineType::PointerRepresentation());
VARIABLE(occupancy, MachineType::PointerRepresentation());
TVARIABLE(OrderedHashMap, table_var, table);
{
// Check we have enough space for the entry.
number_of_buckets.Bind(SmiUntag(CAST(UnsafeLoadFixedArrayElement(
table, OrderedHashMap::NumberOfBucketsIndex()))));
STATIC_ASSERT(OrderedHashMap::kLoadFactor == 2);
TNode<WordT> const capacity = WordShl(number_of_buckets.value(), 1);
TNode<IntPtrT> const number_of_elements = SmiUntag(
CAST(LoadObjectField(table, OrderedHashMap::NumberOfElementsOffset())));
TNode<IntPtrT> const number_of_deleted = SmiUntag(CAST(LoadObjectField(
table, OrderedHashMap::NumberOfDeletedElementsOffset())));
occupancy.Bind(IntPtrAdd(number_of_elements, number_of_deleted));
GotoIf(IntPtrLessThan(occupancy.value(), capacity), &store_new_entry);
// We do not have enough space, grow the table and reload the relevant
// fields.
CallRuntime(Runtime::kMapGrow, context, receiver);
table_var = CAST(LoadObjectField(receiver, JSMap::kTableOffset));
number_of_buckets.Bind(SmiUntag(CAST(UnsafeLoadFixedArrayElement(
table_var.value(), OrderedHashMap::NumberOfBucketsIndex()))));
TNode<IntPtrT> const new_number_of_elements = SmiUntag(CAST(LoadObjectField(
table_var.value(), OrderedHashMap::NumberOfElementsOffset())));
TNode<IntPtrT> const new_number_of_deleted = SmiUntag(CAST(LoadObjectField(
table_var.value(), OrderedHashMap::NumberOfDeletedElementsOffset())));
occupancy.Bind(IntPtrAdd(new_number_of_elements, new_number_of_deleted));
Goto(&store_new_entry);
}
BIND(&store_new_entry);
// Store the key, value and connect the element to the bucket chain.
StoreOrderedHashMapNewEntry(table_var.value(), key, value,
entry_start_position_or_hash.value(),
number_of_buckets.value(), occupancy.value());
Return(receiver);
}
void CollectionsBuiltinsAssembler::StoreOrderedHashMapNewEntry(
TNode<OrderedHashMap> const table, Node* const key, Node* const value,
Node* const hash, Node* const number_of_buckets, Node* const occupancy) {
TNode<WordT> const bucket =
WordAnd(hash, IntPtrSub(number_of_buckets, IntPtrConstant(1)));
TNode<Smi> bucket_entry = CAST(UnsafeLoadFixedArrayElement(
table, bucket, OrderedHashMap::HashTableStartIndex() * kTaggedSize));
// Store the entry elements.
TNode<WordT> const entry_start = IntPtrAdd(
IntPtrMul(occupancy, IntPtrConstant(OrderedHashMap::kEntrySize)),
number_of_buckets);
UnsafeStoreFixedArrayElement(
table, entry_start, key, UPDATE_WRITE_BARRIER,
kTaggedSize * OrderedHashMap::HashTableStartIndex());
UnsafeStoreFixedArrayElement(
table, entry_start, value, UPDATE_WRITE_BARRIER,
kTaggedSize * (OrderedHashMap::HashTableStartIndex() +
OrderedHashMap::kValueOffset));
UnsafeStoreFixedArrayElement(
table, entry_start, bucket_entry, SKIP_WRITE_BARRIER,
kTaggedSize * (OrderedHashMap::HashTableStartIndex() +
OrderedHashMap::kChainOffset));
// Update the bucket head.
UnsafeStoreFixedArrayElement(
table, bucket, SmiTag(occupancy), SKIP_WRITE_BARRIER,
OrderedHashMap::HashTableStartIndex() * kTaggedSize);
// Bump the elements count.
TNode<Smi> const number_of_elements =
CAST(LoadObjectField(table, OrderedHashMap::NumberOfElementsOffset()));
StoreObjectFieldNoWriteBarrier(table,
OrderedHashMap::NumberOfElementsOffset(),
SmiAdd(number_of_elements, SmiConstant(1)));
}
TF_BUILTIN(MapPrototypeDelete, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE,
"Map.prototype.delete");
TNode<OrderedHashMap> const table =
CAST(LoadObjectField(receiver, JSMap::kTableOffset));
VARIABLE(entry_start_position_or_hash, MachineType::PointerRepresentation(),
IntPtrConstant(0));
Label entry_found(this), not_found(this);
TryLookupOrderedHashTableIndex<OrderedHashMap>(table, key, context,
&entry_start_position_or_hash,
&entry_found, ¬_found);
BIND(¬_found);
Return(FalseConstant());
BIND(&entry_found);
// If we found the entry, mark the entry as deleted.
StoreFixedArrayElement(table, entry_start_position_or_hash.value(),
TheHoleConstant(), UPDATE_WRITE_BARRIER,
kTaggedSize * OrderedHashMap::HashTableStartIndex());
StoreFixedArrayElement(table, entry_start_position_or_hash.value(),
TheHoleConstant(), UPDATE_WRITE_BARRIER,
kTaggedSize * (OrderedHashMap::HashTableStartIndex() +
OrderedHashMap::kValueOffset));
// Decrement the number of elements, increment the number of deleted elements.
TNode<Smi> const number_of_elements = SmiSub(
CAST(LoadObjectField(table, OrderedHashMap::NumberOfElementsOffset())),
SmiConstant(1));
StoreObjectFieldNoWriteBarrier(
table, OrderedHashMap::NumberOfElementsOffset(), number_of_elements);
TNode<Smi> const number_of_deleted =
SmiAdd(CAST(LoadObjectField(
table, OrderedHashMap::NumberOfDeletedElementsOffset())),
SmiConstant(1));
StoreObjectFieldNoWriteBarrier(
table, OrderedHashMap::NumberOfDeletedElementsOffset(),
number_of_deleted);
TNode<Smi> const number_of_buckets = CAST(
LoadFixedArrayElement(table, OrderedHashMap::NumberOfBucketsIndex()));
// If there fewer elements than #buckets / 2, shrink the table.
Label shrink(this);
GotoIf(SmiLessThan(SmiAdd(number_of_elements, number_of_elements),
number_of_buckets),
&shrink);
Return(TrueConstant());
BIND(&shrink);
CallRuntime(Runtime::kMapShrink, context, receiver);
Return(TrueConstant());
}
TF_BUILTIN(SetPrototypeAdd, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_SET_TYPE, "Set.prototype.add");
key = NormalizeNumberKey(key);
TNode<OrderedHashSet> const table =
CAST(LoadObjectField(receiver, JSMap::kTableOffset));
VARIABLE(entry_start_position_or_hash, MachineType::PointerRepresentation(),
IntPtrConstant(0));
Label entry_found(this), not_found(this);
TryLookupOrderedHashTableIndex<OrderedHashSet>(table, key, context,
&entry_start_position_or_hash,
&entry_found, ¬_found);
BIND(&entry_found);
// The entry was found, there is nothing to do.
Return(receiver);
Label no_hash(this), add_entry(this), store_new_entry(this);
BIND(¬_found);
{
// If we have a hash code, we can start adding the new entry.
GotoIf(IntPtrGreaterThan(entry_start_position_or_hash.value(),
IntPtrConstant(0)),
&add_entry);
// Otherwise, go to runtime to compute the hash code.
entry_start_position_or_hash.Bind(SmiUntag(CallGetOrCreateHashRaw(key)));
Goto(&add_entry);
}
BIND(&add_entry);
VARIABLE(number_of_buckets, MachineType::PointerRepresentation());
VARIABLE(occupancy, MachineType::PointerRepresentation());
TVARIABLE(OrderedHashSet, table_var, table);
{
// Check we have enough space for the entry.
number_of_buckets.Bind(SmiUntag(CAST(UnsafeLoadFixedArrayElement(
table, OrderedHashSet::NumberOfBucketsIndex()))));
STATIC_ASSERT(OrderedHashSet::kLoadFactor == 2);
TNode<WordT> const capacity = WordShl(number_of_buckets.value(), 1);
TNode<IntPtrT> const number_of_elements = SmiUntag(
CAST(LoadObjectField(table, OrderedHashSet::NumberOfElementsOffset())));
TNode<IntPtrT> const number_of_deleted = SmiUntag(CAST(LoadObjectField(
table, OrderedHashSet::NumberOfDeletedElementsOffset())));
occupancy.Bind(IntPtrAdd(number_of_elements, number_of_deleted));
GotoIf(IntPtrLessThan(occupancy.value(), capacity), &store_new_entry);
// We do not have enough space, grow the table and reload the relevant
// fields.
CallRuntime(Runtime::kSetGrow, context, receiver);
table_var = CAST(LoadObjectField(receiver, JSMap::kTableOffset));
number_of_buckets.Bind(SmiUntag(CAST(UnsafeLoadFixedArrayElement(
table_var.value(), OrderedHashSet::NumberOfBucketsIndex()))));
TNode<IntPtrT> const new_number_of_elements = SmiUntag(CAST(LoadObjectField(
table_var.value(), OrderedHashSet::NumberOfElementsOffset())));
TNode<IntPtrT> const new_number_of_deleted = SmiUntag(CAST(LoadObjectField(
table_var.value(), OrderedHashSet::NumberOfDeletedElementsOffset())));
occupancy.Bind(IntPtrAdd(new_number_of_elements, new_number_of_deleted));
Goto(&store_new_entry);
}
BIND(&store_new_entry);
// Store the key, value and connect the element to the bucket chain.
StoreOrderedHashSetNewEntry(table_var.value(), key,
entry_start_position_or_hash.value(),
number_of_buckets.value(), occupancy.value());
Return(receiver);
}
void CollectionsBuiltinsAssembler::StoreOrderedHashSetNewEntry(
TNode<OrderedHashSet> const table, Node* const key, Node* const hash,
Node* const number_of_buckets, Node* const occupancy) {
TNode<WordT> const bucket =
WordAnd(hash, IntPtrSub(number_of_buckets, IntPtrConstant(1)));
TNode<Smi> bucket_entry = CAST(UnsafeLoadFixedArrayElement(
table, bucket, OrderedHashSet::HashTableStartIndex() * kTaggedSize));
// Store the entry elements.
TNode<WordT> const entry_start = IntPtrAdd(
IntPtrMul(occupancy, IntPtrConstant(OrderedHashSet::kEntrySize)),
number_of_buckets);
UnsafeStoreFixedArrayElement(
table, entry_start, key, UPDATE_WRITE_BARRIER,
kTaggedSize * OrderedHashSet::HashTableStartIndex());
UnsafeStoreFixedArrayElement(
table, entry_start, bucket_entry, SKIP_WRITE_BARRIER,
kTaggedSize * (OrderedHashSet::HashTableStartIndex() +
OrderedHashSet::kChainOffset));
// Update the bucket head.
UnsafeStoreFixedArrayElement(
table, bucket, SmiTag(occupancy), SKIP_WRITE_BARRIER,
OrderedHashSet::HashTableStartIndex() * kTaggedSize);
// Bump the elements count.
TNode<Smi> const number_of_elements =
CAST(LoadObjectField(table, OrderedHashSet::NumberOfElementsOffset()));
StoreObjectFieldNoWriteBarrier(table,
OrderedHashSet::NumberOfElementsOffset(),
SmiAdd(number_of_elements, SmiConstant(1)));
}
TF_BUILTIN(SetPrototypeDelete, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_SET_TYPE,
"Set.prototype.delete");
TNode<OrderedHashSet> const table =
CAST(LoadObjectField(receiver, JSMap::kTableOffset));
VARIABLE(entry_start_position_or_hash, MachineType::PointerRepresentation(),
IntPtrConstant(0));
Label entry_found(this), not_found(this);
TryLookupOrderedHashTableIndex<OrderedHashSet>(table, key, context,
&entry_start_position_or_hash,
&entry_found, ¬_found);
BIND(¬_found);
Return(FalseConstant());
BIND(&entry_found);
// If we found the entry, mark the entry as deleted.
StoreFixedArrayElement(table, entry_start_position_or_hash.value(),
TheHoleConstant(), UPDATE_WRITE_BARRIER,
kTaggedSize * OrderedHashSet::HashTableStartIndex());
// Decrement the number of elements, increment the number of deleted elements.
TNode<Smi> const number_of_elements = SmiSub(
CAST(LoadObjectField(table, OrderedHashSet::NumberOfElementsOffset())),
SmiConstant(1));
StoreObjectFieldNoWriteBarrier(
table, OrderedHashSet::NumberOfElementsOffset(), number_of_elements);
TNode<Smi> const number_of_deleted =
SmiAdd(CAST(LoadObjectField(
table, OrderedHashSet::NumberOfDeletedElementsOffset())),
SmiConstant(1));
StoreObjectFieldNoWriteBarrier(
table, OrderedHashSet::NumberOfDeletedElementsOffset(),
number_of_deleted);
TNode<Smi> const number_of_buckets = CAST(
LoadFixedArrayElement(table, OrderedHashSet::NumberOfBucketsIndex()));
// If there fewer elements than #buckets / 2, shrink the table.
Label shrink(this);
GotoIf(SmiLessThan(SmiAdd(number_of_elements, number_of_elements),
number_of_buckets),
&shrink);
Return(TrueConstant());
BIND(&shrink);
CallRuntime(Runtime::kSetShrink, context, receiver);
Return(TrueConstant());
}
TF_BUILTIN(MapPrototypeEntries, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE,
"Map.prototype.entries");
Return(AllocateJSCollectionIterator<JSMapIterator>(
context, Context::MAP_KEY_VALUE_ITERATOR_MAP_INDEX, receiver));
}
TF_BUILTIN(MapPrototypeGetSize, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE,
"get Map.prototype.size");
TNode<OrderedHashMap> const table =
CAST(LoadObjectField(receiver, JSMap::kTableOffset));
Return(LoadObjectField(table, OrderedHashMap::NumberOfElementsOffset()));
}
TF_BUILTIN(MapPrototypeForEach, CollectionsBuiltinsAssembler) {
const char* const kMethodName = "Map.prototype.forEach";
Node* const argc = Parameter(Descriptor::kJSActualArgumentsCount);
Node* const context = Parameter(Descriptor::kContext);
CodeStubArguments args(this, ChangeInt32ToIntPtr(argc));
TNode<Object> const receiver = args.GetReceiver();
TNode<Object> const callback = args.GetOptionalArgumentValue(0);
TNode<Object> const this_arg = args.GetOptionalArgumentValue(1);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE, kMethodName);
// Ensure that {callback} is actually callable.
Label callback_not_callable(this, Label::kDeferred);
GotoIf(TaggedIsSmi(callback), &callback_not_callable);
GotoIfNot(IsCallable(CAST(callback)), &callback_not_callable);
TVARIABLE(IntPtrT, var_index, IntPtrConstant(0));
TVARIABLE(OrderedHashMap, var_table,
CAST(LoadObjectField(CAST(receiver), JSMap::kTableOffset)));
Label loop(this, {&var_index, &var_table}), done_loop(this);
Goto(&loop);
BIND(&loop);
{
// Transition {table} and {index} if there was any modification to
// the {receiver} while we're iterating.
TNode<IntPtrT> index = var_index.value();
TNode<OrderedHashMap> table = var_table.value();
std::tie(table, index) =
Transition<OrderedHashMap>(table, index, [](Node*, Node*) {});
// Read the next entry from the {table}, skipping holes.
TNode<Object> entry_key;
TNode<IntPtrT> entry_start_position;
std::tie(entry_key, entry_start_position, index) =
NextSkipHoles<OrderedHashMap>(table, index, &done_loop);
// Load the entry value as well.
TNode<Object> entry_value = LoadFixedArrayElement(
table, entry_start_position,
(OrderedHashMap::HashTableStartIndex() + OrderedHashMap::kValueOffset) *
kTaggedSize);
// Invoke the {callback} passing the {entry_key}, {entry_value} and the
// {receiver}.
CallJS(CodeFactory::Call(isolate()), context, callback, this_arg,
entry_value, entry_key, receiver);
// Continue with the next entry.
var_index = index;
var_table = table;
Goto(&loop);
}
BIND(&done_loop);
args.PopAndReturn(UndefinedConstant());
BIND(&callback_not_callable);
{
CallRuntime(Runtime::kThrowCalledNonCallable, context, callback);
Unreachable();
}
}
TF_BUILTIN(MapPrototypeKeys, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE, "Map.prototype.keys");
Return(AllocateJSCollectionIterator<JSMapIterator>(
context, Context::MAP_KEY_ITERATOR_MAP_INDEX, receiver));
}
TF_BUILTIN(MapPrototypeValues, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_MAP_TYPE,
"Map.prototype.values");
Return(AllocateJSCollectionIterator<JSMapIterator>(
context, Context::MAP_VALUE_ITERATOR_MAP_INDEX, receiver));
}
TF_BUILTIN(MapIteratorPrototypeNext, CollectionsBuiltinsAssembler) {
const char* const kMethodName = "Map Iterator.prototype.next";
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
// Ensure that the {receiver} is actually a JSMapIterator.
Label if_receiver_valid(this), if_receiver_invalid(this, Label::kDeferred);
GotoIf(TaggedIsSmi(receiver), &if_receiver_invalid);
TNode<Uint16T> const receiver_instance_type = LoadInstanceType(receiver);
GotoIf(
InstanceTypeEqual(receiver_instance_type, JS_MAP_KEY_VALUE_ITERATOR_TYPE),
&if_receiver_valid);
GotoIf(InstanceTypeEqual(receiver_instance_type, JS_MAP_KEY_ITERATOR_TYPE),
&if_receiver_valid);
Branch(InstanceTypeEqual(receiver_instance_type, JS_MAP_VALUE_ITERATOR_TYPE),
&if_receiver_valid, &if_receiver_invalid);
BIND(&if_receiver_invalid);
ThrowTypeError(context, MessageTemplate::kIncompatibleMethodReceiver,
StringConstant(kMethodName), receiver);
BIND(&if_receiver_valid);
// Check if the {receiver} is exhausted.
VARIABLE(var_done, MachineRepresentation::kTagged, TrueConstant());
VARIABLE(var_value, MachineRepresentation::kTagged, UndefinedConstant());
Label return_value(this, {&var_done, &var_value}), return_entry(this),
return_end(this, Label::kDeferred);
// Transition the {receiver} table if necessary.
TNode<OrderedHashMap> table;
TNode<IntPtrT> index;
std::tie(table, index) =
TransitionAndUpdate<JSMapIterator, OrderedHashMap>(CAST(receiver));
// Read the next entry from the {table}, skipping holes.
TNode<Object> entry_key;
TNode<IntPtrT> entry_start_position;
std::tie(entry_key, entry_start_position, index) =
NextSkipHoles<OrderedHashMap>(table, index, &return_end);
StoreObjectFieldNoWriteBarrier(receiver, JSMapIterator::kIndexOffset,
SmiTag(index));
var_value.Bind(entry_key);
var_done.Bind(FalseConstant());
// Check how to return the {key} (depending on {receiver} type).
GotoIf(InstanceTypeEqual(receiver_instance_type, JS_MAP_KEY_ITERATOR_TYPE),
&return_value);
var_value.Bind(LoadFixedArrayElement(
table, entry_start_position,
(OrderedHashMap::HashTableStartIndex() + OrderedHashMap::kValueOffset) *
kTaggedSize));
Branch(InstanceTypeEqual(receiver_instance_type, JS_MAP_VALUE_ITERATOR_TYPE),
&return_value, &return_entry);
BIND(&return_entry);
{
Node* result =
AllocateJSIteratorResultForEntry(context, entry_key, var_value.value());
Return(result);
}
BIND(&return_value);
{
TNode<JSObject> result =
AllocateJSIteratorResult(context, var_value.value(), var_done.value());
Return(result);
}
BIND(&return_end);
{
StoreObjectFieldRoot(receiver, JSMapIterator::kTableOffset,
RootIndex::kEmptyOrderedHashMap);
Goto(&return_value);
}
}
TF_BUILTIN(SetPrototypeHas, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_SET_TYPE, "Set.prototype.has");
TNode<Object> const table = LoadObjectField(receiver, JSMap::kTableOffset);
VARIABLE(entry_start_position, MachineType::PointerRepresentation(),
IntPtrConstant(0));
VARIABLE(result, MachineRepresentation::kTaggedSigned, IntPtrConstant(0));
Label if_key_smi(this), if_key_string(this), if_key_heap_number(this),
if_key_bigint(this), entry_found(this), not_found(this), done(this);
GotoIf(TaggedIsSmi(key), &if_key_smi);
TNode<Map> key_map = LoadMap(key);
TNode<Uint16T> key_instance_type = LoadMapInstanceType(key_map);
GotoIf(IsStringInstanceType(key_instance_type), &if_key_string);
GotoIf(IsHeapNumberMap(key_map), &if_key_heap_number);
GotoIf(IsBigIntInstanceType(key_instance_type), &if_key_bigint);
FindOrderedHashTableEntryForOtherKey<OrderedHashSet>(
context, table, key, &entry_start_position, &entry_found, ¬_found);
BIND(&if_key_smi);
{
FindOrderedHashTableEntryForSmiKey<OrderedHashSet>(
table, key, &entry_start_position, &entry_found, ¬_found);
}
BIND(&if_key_string);
{
FindOrderedHashTableEntryForStringKey<OrderedHashSet>(
context, table, key, &entry_start_position, &entry_found, ¬_found);
}
BIND(&if_key_heap_number);
{
FindOrderedHashTableEntryForHeapNumberKey<OrderedHashSet>(
context, table, key, &entry_start_position, &entry_found, ¬_found);
}
BIND(&if_key_bigint);
{
FindOrderedHashTableEntryForBigIntKey<OrderedHashSet>(
context, table, key, &entry_start_position, &entry_found, ¬_found);
}
BIND(&entry_found);
Return(TrueConstant());
BIND(¬_found);
Return(FalseConstant());
}
TF_BUILTIN(SetPrototypeEntries, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_SET_TYPE,
"Set.prototype.entries");
Return(AllocateJSCollectionIterator<JSSetIterator>(
context, Context::SET_KEY_VALUE_ITERATOR_MAP_INDEX, receiver));
}
TF_BUILTIN(SetPrototypeGetSize, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_SET_TYPE,
"get Set.prototype.size");
TNode<OrderedHashSet> const table =
CAST(LoadObjectField(receiver, JSSet::kTableOffset));
Return(LoadObjectField(table, OrderedHashSet::NumberOfElementsOffset()));
}
TF_BUILTIN(SetPrototypeForEach, CollectionsBuiltinsAssembler) {
const char* const kMethodName = "Set.prototype.forEach";
Node* const argc = Parameter(Descriptor::kJSActualArgumentsCount);
Node* const context = Parameter(Descriptor::kContext);
CodeStubArguments args(this, ChangeInt32ToIntPtr(argc));
TNode<Object> const receiver = args.GetReceiver();
TNode<Object> const callback = args.GetOptionalArgumentValue(0);
TNode<Object> const this_arg = args.GetOptionalArgumentValue(1);
ThrowIfNotInstanceType(context, receiver, JS_SET_TYPE, kMethodName);
// Ensure that {callback} is actually callable.
Label callback_not_callable(this, Label::kDeferred);
GotoIf(TaggedIsSmi(callback), &callback_not_callable);
GotoIfNot(IsCallable(CAST(callback)), &callback_not_callable);
TVARIABLE(IntPtrT, var_index, IntPtrConstant(0));
TVARIABLE(OrderedHashSet, var_table,
CAST(LoadObjectField(CAST(receiver), JSSet::kTableOffset)));
Label loop(this, {&var_index, &var_table}), done_loop(this);
Goto(&loop);
BIND(&loop);
{
// Transition {table} and {index} if there was any modification to
// the {receiver} while we're iterating.
TNode<IntPtrT> index = var_index.value();
TNode<OrderedHashSet> table = var_table.value();
std::tie(table, index) =
Transition<OrderedHashSet>(table, index, [](Node*, Node*) {});
// Read the next entry from the {table}, skipping holes.
Node* entry_key;
Node* entry_start_position;
std::tie(entry_key, entry_start_position, index) =
NextSkipHoles<OrderedHashSet>(table, index, &done_loop);
// Invoke the {callback} passing the {entry_key} (twice) and the {receiver}.
CallJS(CodeFactory::Call(isolate()), context, callback, this_arg, entry_key,
entry_key, receiver);
// Continue with the next entry.
var_index = index;
var_table = table;
Goto(&loop);
}
BIND(&done_loop);
args.PopAndReturn(UndefinedConstant());
BIND(&callback_not_callable);
{
CallRuntime(Runtime::kThrowCalledNonCallable, context, callback);
Unreachable();
}
}
TF_BUILTIN(SetPrototypeValues, CollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
ThrowIfNotInstanceType(context, receiver, JS_SET_TYPE,
"Set.prototype.values");
Return(AllocateJSCollectionIterator<JSSetIterator>(
context, Context::SET_VALUE_ITERATOR_MAP_INDEX, receiver));
}
TF_BUILTIN(SetIteratorPrototypeNext, CollectionsBuiltinsAssembler) {
const char* const kMethodName = "Set Iterator.prototype.next";
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const context = Parameter(Descriptor::kContext);
// Ensure that the {receiver} is actually a JSSetIterator.
Label if_receiver_valid(this), if_receiver_invalid(this, Label::kDeferred);
GotoIf(TaggedIsSmi(receiver), &if_receiver_invalid);
TNode<Uint16T> const receiver_instance_type = LoadInstanceType(receiver);
GotoIf(InstanceTypeEqual(receiver_instance_type, JS_SET_VALUE_ITERATOR_TYPE),
&if_receiver_valid);
Branch(
InstanceTypeEqual(receiver_instance_type, JS_SET_KEY_VALUE_ITERATOR_TYPE),
&if_receiver_valid, &if_receiver_invalid);
BIND(&if_receiver_invalid);
ThrowTypeError(context, MessageTemplate::kIncompatibleMethodReceiver,
StringConstant(kMethodName), receiver);
BIND(&if_receiver_valid);
// Check if the {receiver} is exhausted.
VARIABLE(var_done, MachineRepresentation::kTagged, TrueConstant());
VARIABLE(var_value, MachineRepresentation::kTagged, UndefinedConstant());
Label return_value(this, {&var_done, &var_value}), return_entry(this),
return_end(this, Label::kDeferred);
// Transition the {receiver} table if necessary.
TNode<OrderedHashSet> table;
TNode<IntPtrT> index;
std::tie(table, index) =
TransitionAndUpdate<JSSetIterator, OrderedHashSet>(CAST(receiver));
// Read the next entry from the {table}, skipping holes.
Node* entry_key;
Node* entry_start_position;
std::tie(entry_key, entry_start_position, index) =
NextSkipHoles<OrderedHashSet>(table, index, &return_end);
StoreObjectFieldNoWriteBarrier(receiver, JSSetIterator::kIndexOffset,
SmiTag(index));
var_value.Bind(entry_key);
var_done.Bind(FalseConstant());
// Check how to return the {key} (depending on {receiver} type).
Branch(InstanceTypeEqual(receiver_instance_type, JS_SET_VALUE_ITERATOR_TYPE),
&return_value, &return_entry);
BIND(&return_entry);
{
Node* result = AllocateJSIteratorResultForEntry(context, var_value.value(),
var_value.value());
Return(result);
}
BIND(&return_value);
{
TNode<JSObject> result =
AllocateJSIteratorResult(context, var_value.value(), var_done.value());
Return(result);
}
BIND(&return_end);
{
StoreObjectFieldRoot(receiver, JSSetIterator::kTableOffset,
RootIndex::kEmptyOrderedHashSet);
Goto(&return_value);
}
}
template <typename CollectionType>
void CollectionsBuiltinsAssembler::TryLookupOrderedHashTableIndex(
Node* const table, Node* const key, Node* const context, Variable* result,
Label* if_entry_found, Label* if_not_found) {
Label if_key_smi(this), if_key_string(this), if_key_heap_number(this),
if_key_bigint(this);
GotoIf(TaggedIsSmi(key), &if_key_smi);
TNode<Map> key_map = LoadMap(key);
TNode<Uint16T> key_instance_type = LoadMapInstanceType(key_map);
GotoIf(IsStringInstanceType(key_instance_type), &if_key_string);
GotoIf(IsHeapNumberMap(key_map), &if_key_heap_number);
GotoIf(IsBigIntInstanceType(key_instance_type), &if_key_bigint);
FindOrderedHashTableEntryForOtherKey<CollectionType>(
context, table, key, result, if_entry_found, if_not_found);
BIND(&if_key_smi);
{
FindOrderedHashTableEntryForSmiKey<CollectionType>(
table, key, result, if_entry_found, if_not_found);
}
BIND(&if_key_string);
{
FindOrderedHashTableEntryForStringKey<CollectionType>(
context, table, key, result, if_entry_found, if_not_found);
}
BIND(&if_key_heap_number);
{
FindOrderedHashTableEntryForHeapNumberKey<CollectionType>(
context, table, key, result, if_entry_found, if_not_found);
}
BIND(&if_key_bigint);
{
FindOrderedHashTableEntryForBigIntKey<CollectionType>(
context, table, key, result, if_entry_found, if_not_found);
}
}
TF_BUILTIN(FindOrderedHashMapEntry, CollectionsBuiltinsAssembler) {
Node* const table = Parameter(Descriptor::kTable);
Node* const key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
VARIABLE(entry_start_position, MachineType::PointerRepresentation(),
IntPtrConstant(0));
Label entry_found(this), not_found(this);
TryLookupOrderedHashTableIndex<OrderedHashMap>(
table, key, context, &entry_start_position, &entry_found, ¬_found);
BIND(&entry_found);
Return(SmiTag(entry_start_position.value()));
BIND(¬_found);
Return(SmiConstant(-1));
}
class WeakCollectionsBuiltinsAssembler : public BaseCollectionsAssembler {
public:
explicit WeakCollectionsBuiltinsAssembler(compiler::CodeAssemblerState* state)
: BaseCollectionsAssembler(state) {}
protected:
void AddEntry(TNode<EphemeronHashTable> table, TNode<IntPtrT> key_index,
TNode<Object> key, TNode<Object> value,
TNode<IntPtrT> number_of_elements);
TNode<Object> AllocateTable(Variant variant, TNode<Context> context,
TNode<IntPtrT> at_least_space_for) override;
// Generates and sets the identity for a JSRececiver.
TNode<Smi> CreateIdentityHash(TNode<Object> receiver);
TNode<IntPtrT> EntryMask(TNode<IntPtrT> capacity);
// Builds code that finds the EphemeronHashTable entry for a {key} using the
// comparison code generated by {key_compare}. The key index is returned if
// the {key} is found.
using KeyComparator =
std::function<void(TNode<Object> entry_key, Label* if_same)>;
TNode<IntPtrT> FindKeyIndex(TNode<HeapObject> table, TNode<IntPtrT> key_hash,
TNode<IntPtrT> entry_mask,
const KeyComparator& key_compare);
// Builds code that finds an EphemeronHashTable entry available for a new
// entry.
TNode<IntPtrT> FindKeyIndexForInsertion(TNode<HeapObject> table,
TNode<IntPtrT> key_hash,
TNode<IntPtrT> entry_mask);
// Builds code that finds the EphemeronHashTable entry with key that matches
// {key} and returns the entry's key index. If {key} cannot be found, jumps to
// {if_not_found}.
TNode<IntPtrT> FindKeyIndexForKey(TNode<HeapObject> table, TNode<Object> key,
TNode<IntPtrT> hash,
TNode<IntPtrT> entry_mask,
Label* if_not_found);
TNode<Word32T> InsufficientCapacityToAdd(TNode<IntPtrT> capacity,
TNode<IntPtrT> number_of_elements,
TNode<IntPtrT> number_of_deleted);
TNode<IntPtrT> KeyIndexFromEntry(TNode<IntPtrT> entry);
TNode<IntPtrT> LoadNumberOfElements(TNode<EphemeronHashTable> table,
int offset);
TNode<IntPtrT> LoadNumberOfDeleted(TNode<EphemeronHashTable> table,
int offset = 0);
TNode<EphemeronHashTable> LoadTable(TNode<JSWeakCollection> collection);
TNode<IntPtrT> LoadTableCapacity(TNode<EphemeronHashTable> table);
void RemoveEntry(TNode<EphemeronHashTable> table, TNode<IntPtrT> key_index,
TNode<IntPtrT> number_of_elements);
TNode<BoolT> ShouldRehash(TNode<IntPtrT> number_of_elements,
TNode<IntPtrT> number_of_deleted);
TNode<Word32T> ShouldShrink(TNode<IntPtrT> capacity,
TNode<IntPtrT> number_of_elements);
TNode<IntPtrT> ValueIndexFromKeyIndex(TNode<IntPtrT> key_index);
};
void WeakCollectionsBuiltinsAssembler::AddEntry(
TNode<EphemeronHashTable> table, TNode<IntPtrT> key_index,
TNode<Object> key, TNode<Object> value, TNode<IntPtrT> number_of_elements) {
// See EphemeronHashTable::AddEntry().
TNode<IntPtrT> value_index = ValueIndexFromKeyIndex(key_index);
UnsafeStoreFixedArrayElement(table, key_index, key,
UPDATE_EPHEMERON_KEY_WRITE_BARRIER);
UnsafeStoreFixedArrayElement(table, value_index, value);
// See HashTableBase::ElementAdded().
UnsafeStoreFixedArrayElement(
table, EphemeronHashTable::kNumberOfElementsIndex,
SmiFromIntPtr(number_of_elements), SKIP_WRITE_BARRIER);
}
TNode<Object> WeakCollectionsBuiltinsAssembler::AllocateTable(
Variant variant, TNode<Context> context,
TNode<IntPtrT> at_least_space_for) {
// See HashTable::New().
CSA_ASSERT(this,
IntPtrLessThanOrEqual(IntPtrConstant(0), at_least_space_for));
TNode<IntPtrT> capacity = HashTableComputeCapacity(at_least_space_for);
// See HashTable::NewInternal().
TNode<IntPtrT> length = KeyIndexFromEntry(capacity);
TNode<FixedArray> table = CAST(
AllocateFixedArray(HOLEY_ELEMENTS, length, kAllowLargeObjectAllocation));
RootIndex map_root_index = EphemeronHashTableShape::GetMapRootIndex();
StoreMapNoWriteBarrier(table, map_root_index);
StoreFixedArrayElement(table, EphemeronHashTable::kNumberOfElementsIndex,
SmiConstant(0), SKIP_WRITE_BARRIER);
StoreFixedArrayElement(table,
EphemeronHashTable::kNumberOfDeletedElementsIndex,
SmiConstant(0), SKIP_WRITE_BARRIER);
StoreFixedArrayElement(table, EphemeronHashTable::kCapacityIndex,
SmiFromIntPtr(capacity), SKIP_WRITE_BARRIER);
TNode<IntPtrT> start = KeyIndexFromEntry(IntPtrConstant(0));
FillFixedArrayWithValue(HOLEY_ELEMENTS, table, start, length,
RootIndex::kUndefinedValue);
return table;
}
TNode<Smi> WeakCollectionsBuiltinsAssembler::CreateIdentityHash(
TNode<Object> key) {
TNode<ExternalReference> function_addr =
ExternalConstant(ExternalReference::jsreceiver_create_identity_hash());
TNode<ExternalReference> isolate_ptr =
ExternalConstant(ExternalReference::isolate_address(isolate()));
MachineType type_ptr = MachineType::Pointer();
MachineType type_tagged = MachineType::AnyTagged();
return CAST(CallCFunction(function_addr, type_tagged,
std::make_pair(type_ptr, isolate_ptr),
std::make_pair(type_tagged, key)));
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::EntryMask(
TNode<IntPtrT> capacity) {
return IntPtrSub(capacity, IntPtrConstant(1));
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::FindKeyIndex(
TNode<HeapObject> table, TNode<IntPtrT> key_hash, TNode<IntPtrT> entry_mask,
const KeyComparator& key_compare) {
// See HashTable::FirstProbe().
TVARIABLE(IntPtrT, var_entry, WordAnd(key_hash, entry_mask));
TVARIABLE(IntPtrT, var_count, IntPtrConstant(0));
Variable* loop_vars[] = {&var_count, &var_entry};
Label loop(this, arraysize(loop_vars), loop_vars), if_found(this);
Goto(&loop);
BIND(&loop);
TNode<IntPtrT> key_index;
{
key_index = KeyIndexFromEntry(var_entry.value());
TNode<Object> entry_key =
UnsafeLoadFixedArrayElement(CAST(table), key_index);
key_compare(entry_key, &if_found);
// See HashTable::NextProbe().
Increment(&var_count);
var_entry =
WordAnd(IntPtrAdd(var_entry.value(), var_count.value()), entry_mask);
Goto(&loop);
}
BIND(&if_found);
return key_index;
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::FindKeyIndexForInsertion(
TNode<HeapObject> table, TNode<IntPtrT> key_hash,
TNode<IntPtrT> entry_mask) {
// See HashTable::FindInsertionEntry().
auto is_not_live = [&](TNode<Object> entry_key, Label* if_found) {
// This is the the negative form BaseShape::IsLive().
GotoIf(Word32Or(IsTheHole(entry_key), IsUndefined(entry_key)), if_found);
};
return FindKeyIndex(table, key_hash, entry_mask, is_not_live);
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::FindKeyIndexForKey(
TNode<HeapObject> table, TNode<Object> key, TNode<IntPtrT> hash,
TNode<IntPtrT> entry_mask, Label* if_not_found) {
// See HashTable::FindEntry().
auto match_key_or_exit_on_empty = [&](TNode<Object> entry_key,
Label* if_same) {
GotoIf(IsUndefined(entry_key), if_not_found);
GotoIf(TaggedEqual(entry_key, key), if_same);
};
return FindKeyIndex(table, hash, entry_mask, match_key_or_exit_on_empty);
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::KeyIndexFromEntry(
TNode<IntPtrT> entry) {
// See HashTable::KeyAt().
// (entry * kEntrySize) + kElementsStartIndex + kEntryKeyIndex
return IntPtrAdd(
IntPtrMul(entry, IntPtrConstant(EphemeronHashTable::kEntrySize)),
IntPtrConstant(EphemeronHashTable::kElementsStartIndex +
EphemeronHashTable::kEntryKeyIndex));
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::LoadNumberOfElements(
TNode<EphemeronHashTable> table, int offset) {
TNode<IntPtrT> number_of_elements = SmiUntag(CAST(UnsafeLoadFixedArrayElement(
table, EphemeronHashTable::kNumberOfElementsIndex)));
return IntPtrAdd(number_of_elements, IntPtrConstant(offset));
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::LoadNumberOfDeleted(
TNode<EphemeronHashTable> table, int offset) {
TNode<IntPtrT> number_of_deleted = SmiUntag(CAST(UnsafeLoadFixedArrayElement(
table, EphemeronHashTable::kNumberOfDeletedElementsIndex)));
return IntPtrAdd(number_of_deleted, IntPtrConstant(offset));
}
TNode<EphemeronHashTable> WeakCollectionsBuiltinsAssembler::LoadTable(
TNode<JSWeakCollection> collection) {
return CAST(LoadObjectField(collection, JSWeakCollection::kTableOffset));
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::LoadTableCapacity(
TNode<EphemeronHashTable> table) {
return SmiUntag(CAST(
UnsafeLoadFixedArrayElement(table, EphemeronHashTable::kCapacityIndex)));
}
TNode<Word32T> WeakCollectionsBuiltinsAssembler::InsufficientCapacityToAdd(
TNode<IntPtrT> capacity, TNode<IntPtrT> number_of_elements,
TNode<IntPtrT> number_of_deleted) {
// This is the negative form of HashTable::HasSufficientCapacityToAdd().
// Return true if:
// - more than 50% of the available space are deleted elements
// - less than 50% will be available
TNode<IntPtrT> available = IntPtrSub(capacity, number_of_elements);
TNode<IntPtrT> half_available = WordShr(available, 1);
TNode<IntPtrT> needed_available = WordShr(number_of_elements, 1);
return Word32Or(
// deleted > half
IntPtrGreaterThan(number_of_deleted, half_available),
// elements + needed available > capacity
IntPtrGreaterThan(IntPtrAdd(number_of_elements, needed_available),
capacity));
}
void WeakCollectionsBuiltinsAssembler::RemoveEntry(
TNode<EphemeronHashTable> table, TNode<IntPtrT> key_index,
TNode<IntPtrT> number_of_elements) {
// See EphemeronHashTable::RemoveEntry().
TNode<IntPtrT> value_index = ValueIndexFromKeyIndex(key_index);
StoreFixedArrayElement(table, key_index, TheHoleConstant());
StoreFixedArrayElement(table, value_index, TheHoleConstant());
// See HashTableBase::ElementRemoved().
TNode<IntPtrT> number_of_deleted = LoadNumberOfDeleted(table, 1);
StoreFixedArrayElement(table, EphemeronHashTable::kNumberOfElementsIndex,
SmiFromIntPtr(number_of_elements), SKIP_WRITE_BARRIER);
StoreFixedArrayElement(table,
EphemeronHashTable::kNumberOfDeletedElementsIndex,
SmiFromIntPtr(number_of_deleted), SKIP_WRITE_BARRIER);
}
TNode<BoolT> WeakCollectionsBuiltinsAssembler::ShouldRehash(
TNode<IntPtrT> number_of_elements, TNode<IntPtrT> number_of_deleted) {
// Rehash if more than 33% of the entries are deleted.
return IntPtrGreaterThanOrEqual(WordShl(number_of_deleted, 1),
number_of_elements);
}
TNode<Word32T> WeakCollectionsBuiltinsAssembler::ShouldShrink(
TNode<IntPtrT> capacity, TNode<IntPtrT> number_of_elements) {
// See HashTable::Shrink().
TNode<IntPtrT> quarter_capacity = WordShr(capacity, 2);
return Word32And(
// Shrink to fit the number of elements if only a quarter of the
// capacity is filled with elements.
IntPtrLessThanOrEqual(number_of_elements, quarter_capacity),
// Allocate a new dictionary with room for at least the current
// number of elements. The allocation method will make sure that
// there is extra room in the dictionary for additions. Don't go
// lower than room for 16 elements.
IntPtrGreaterThanOrEqual(number_of_elements, IntPtrConstant(16)));
}
TNode<IntPtrT> WeakCollectionsBuiltinsAssembler::ValueIndexFromKeyIndex(
TNode<IntPtrT> key_index) {
return IntPtrAdd(key_index,
IntPtrConstant(EphemeronHashTableShape::kEntryValueIndex -
EphemeronHashTable::kEntryKeyIndex));
}
TF_BUILTIN(WeakMapConstructor, WeakCollectionsBuiltinsAssembler) {
TNode<Object> new_target = CAST(Parameter(Descriptor::kJSNewTarget));
TNode<IntPtrT> argc =
ChangeInt32ToIntPtr(Parameter(Descriptor::kJSActualArgumentsCount));
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
GenerateConstructor(kWeakMap, isolate()->factory()->WeakMap_string(),
new_target, argc, context);
}
TF_BUILTIN(WeakSetConstructor, WeakCollectionsBuiltinsAssembler) {
TNode<Object> new_target = CAST(Parameter(Descriptor::kJSNewTarget));
TNode<IntPtrT> argc =
ChangeInt32ToIntPtr(Parameter(Descriptor::kJSActualArgumentsCount));
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
GenerateConstructor(kWeakSet, isolate()->factory()->WeakSet_string(),
new_target, argc, context);
}
TF_BUILTIN(WeakMapLookupHashIndex, WeakCollectionsBuiltinsAssembler) {
TNode<EphemeronHashTable> table = CAST(Parameter(Descriptor::kTable));
TNode<Object> key = CAST(Parameter(Descriptor::kKey));
Label if_not_found(this);
GotoIfNotJSReceiver(key, &if_not_found);
TNode<IntPtrT> hash = LoadJSReceiverIdentityHash(key, &if_not_found);
TNode<IntPtrT> capacity = LoadTableCapacity(table);
TNode<IntPtrT> key_index =
FindKeyIndexForKey(table, key, hash, EntryMask(capacity), &if_not_found);
Return(SmiTag(ValueIndexFromKeyIndex(key_index)));
BIND(&if_not_found);
Return(SmiConstant(-1));
}
TF_BUILTIN(WeakMapGet, WeakCollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
Label return_undefined(this);
ThrowIfNotInstanceType(context, receiver, JS_WEAK_MAP_TYPE,
"WeakMap.prototype.get");
TNode<EphemeronHashTable> const table = LoadTable(CAST(receiver));
TNode<Smi> const index =
CAST(CallBuiltin(Builtins::kWeakMapLookupHashIndex, context, table, key));
GotoIf(TaggedEqual(index, SmiConstant(-1)), &return_undefined);
Return(LoadFixedArrayElement(table, SmiUntag(index)));
BIND(&return_undefined);
Return(UndefinedConstant());
}
TF_BUILTIN(WeakMapPrototypeHas, WeakCollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
Label return_false(this);
ThrowIfNotInstanceType(context, receiver, JS_WEAK_MAP_TYPE,
"WeakMap.prototype.has");
TNode<EphemeronHashTable> const table = LoadTable(CAST(receiver));
TNode<Object> const index =
CallBuiltin(Builtins::kWeakMapLookupHashIndex, context, table, key);
GotoIf(TaggedEqual(index, SmiConstant(-1)), &return_false);
Return(TrueConstant());
BIND(&return_false);
Return(FalseConstant());
}
// Helper that removes the entry with a given key from the backing store
// (EphemeronHashTable) of a WeakMap or WeakSet.
TF_BUILTIN(WeakCollectionDelete, WeakCollectionsBuiltinsAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<JSWeakCollection> collection = CAST(Parameter(Descriptor::kCollection));
TNode<Object> key = CAST(Parameter(Descriptor::kKey));
Label call_runtime(this), if_not_found(this);
GotoIfNotJSReceiver(key, &if_not_found);
TNode<IntPtrT> hash = LoadJSReceiverIdentityHash(key, &if_not_found);
TNode<EphemeronHashTable> table = LoadTable(collection);
TNode<IntPtrT> capacity = LoadTableCapacity(table);
TNode<IntPtrT> key_index =
FindKeyIndexForKey(table, key, hash, EntryMask(capacity), &if_not_found);
TNode<IntPtrT> number_of_elements = LoadNumberOfElements(table, -1);
GotoIf(ShouldShrink(capacity, number_of_elements), &call_runtime);
RemoveEntry(table, key_index, number_of_elements);
Return(TrueConstant());
BIND(&if_not_found);
Return(FalseConstant());
BIND(&call_runtime);
Return(CallRuntime(Runtime::kWeakCollectionDelete, context, collection, key,
SmiTag(hash)));
}
// Helper that sets the key and value to the backing store (EphemeronHashTable)
// of a WeakMap or WeakSet.
TF_BUILTIN(WeakCollectionSet, WeakCollectionsBuiltinsAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<JSWeakCollection> collection = CAST(Parameter(Descriptor::kCollection));
TNode<JSReceiver> key = CAST(Parameter(Descriptor::kKey));
TNode<Object> value = CAST(Parameter(Descriptor::kValue));
CSA_ASSERT(this, IsJSReceiver(key));
Label call_runtime(this), if_no_hash(this), if_not_found(this);
TNode<EphemeronHashTable> table = LoadTable(collection);
TNode<IntPtrT> capacity = LoadTableCapacity(table);
TNode<IntPtrT> entry_mask = EntryMask(capacity);
TVARIABLE(IntPtrT, var_hash, LoadJSReceiverIdentityHash(key, &if_no_hash));
TNode<IntPtrT> key_index = FindKeyIndexForKey(table, key, var_hash.value(),
entry_mask, &if_not_found);
StoreFixedArrayElement(table, ValueIndexFromKeyIndex(key_index), value);
Return(collection);
BIND(&if_no_hash);
{
var_hash = SmiUntag(CreateIdentityHash(key));
Goto(&if_not_found);
}
BIND(&if_not_found);
{
TNode<IntPtrT> number_of_deleted = LoadNumberOfDeleted(table);
TNode<IntPtrT> number_of_elements = LoadNumberOfElements(table, 1);
// TODO(pwong): Port HashTable's Rehash() and EnsureCapacity() to CSA.
GotoIf(Word32Or(ShouldRehash(number_of_elements, number_of_deleted),
InsufficientCapacityToAdd(capacity, number_of_elements,
number_of_deleted)),
&call_runtime);
TNode<IntPtrT> insertion_key_index =
FindKeyIndexForInsertion(table, var_hash.value(), entry_mask);
AddEntry(table, insertion_key_index, key, value, number_of_elements);
Return(collection);
}
BIND(&call_runtime);
{
CallRuntime(Runtime::kWeakCollectionSet, context, collection, key, value,
SmiTag(var_hash.value()));
Return(collection);
}
}
TF_BUILTIN(WeakMapPrototypeDelete, CodeStubAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<Object> receiver = CAST(Parameter(Descriptor::kReceiver));
TNode<Object> key = CAST(Parameter(Descriptor::kKey));
ThrowIfNotInstanceType(context, receiver, JS_WEAK_MAP_TYPE,
"WeakMap.prototype.delete");
Return(CallBuiltin(Builtins::kWeakCollectionDelete, context, receiver, key));
}
TF_BUILTIN(WeakMapPrototypeSet, WeakCollectionsBuiltinsAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<Object> receiver = CAST(Parameter(Descriptor::kReceiver));
TNode<Object> key = CAST(Parameter(Descriptor::kKey));
TNode<Object> value = CAST(Parameter(Descriptor::kValue));
ThrowIfNotInstanceType(context, receiver, JS_WEAK_MAP_TYPE,
"WeakMap.prototype.set");
Label throw_invalid_key(this);
GotoIfNotJSReceiver(key, &throw_invalid_key);
Return(
CallBuiltin(Builtins::kWeakCollectionSet, context, receiver, key, value));
BIND(&throw_invalid_key);
ThrowTypeError(context, MessageTemplate::kInvalidWeakMapKey, key);
}
TF_BUILTIN(WeakSetPrototypeAdd, WeakCollectionsBuiltinsAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<Object> receiver = CAST(Parameter(Descriptor::kReceiver));
TNode<Object> value = CAST(Parameter(Descriptor::kValue));
ThrowIfNotInstanceType(context, receiver, JS_WEAK_SET_TYPE,
"WeakSet.prototype.add");
Label throw_invalid_value(this);
GotoIfNotJSReceiver(value, &throw_invalid_value);
Return(CallBuiltin(Builtins::kWeakCollectionSet, context, receiver, value,
TrueConstant()));
BIND(&throw_invalid_value);
ThrowTypeError(context, MessageTemplate::kInvalidWeakSetValue, value);
}
TF_BUILTIN(WeakSetPrototypeDelete, CodeStubAssembler) {
TNode<Context> context = CAST(Parameter(Descriptor::kContext));
TNode<Object> receiver = CAST(Parameter(Descriptor::kReceiver));
TNode<Object> value = CAST(Parameter(Descriptor::kValue));
ThrowIfNotInstanceType(context, receiver, JS_WEAK_SET_TYPE,
"WeakSet.prototype.delete");
Return(
CallBuiltin(Builtins::kWeakCollectionDelete, context, receiver, value));
}
TF_BUILTIN(WeakSetPrototypeHas, WeakCollectionsBuiltinsAssembler) {
Node* const receiver = Parameter(Descriptor::kReceiver);
Node* const key = Parameter(Descriptor::kKey);
Node* const context = Parameter(Descriptor::kContext);
Label return_false(this);
ThrowIfNotInstanceType(context, receiver, JS_WEAK_SET_TYPE,
"WeakSet.prototype.has");
TNode<EphemeronHashTable> const table = LoadTable(CAST(receiver));
TNode<Object> const index =
CallBuiltin(Builtins::kWeakMapLookupHashIndex, context, table, key);
GotoIf(TaggedEqual(index, SmiConstant(-1)), &return_false);
Return(TrueConstant());
BIND(&return_false);
Return(FalseConstant());
}
} // namespace internal
} // namespace v8