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[compiler] Replace boilerplate objects with direct reads

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Namely:
 * ObjectBoilerplateDescription
 * ArrayBoilerplateDescription

Bug: v8:7790
Change-Id: I05d106b5e557604e67e0cebaef7489fa3faf3562
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2398641
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69811}
This commit is contained in:
Santiago Aboy Solanes 2020-09-10 13:53:27 +01:00 committed by Commit Bot
parent d5cd5d2304
commit 4bb97ec877
2 changed files with 11 additions and 13 deletions
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5
src/compiler/heap-refs.h
View File

@ -55,9 +55,12 @@ enum class OddballType : uint8_t {
// Classes on this list will skip serialization when
// FLAG_turbo_direct_heap_access is on. Otherwise, they might get serialized.
#define HEAP_BROKER_NEVER_SERIALIZED_OBJECT_LIST(V) \
/* Subtypes of FixedArray */ \
V(ObjectBoilerplateDescription) \
/* Subtypes of FixedArrayBase */ \
V(FixedDoubleArray) \
/* Subtypes of HeapObject */ \
V(ArrayBoilerplateDescription) \
V(HeapNumber)
// This list is sorted such that subtypes appear before their supertypes.
@ -76,7 +79,6 @@ enum class OddballType : uint8_t {
V(NativeContext) \
/* Subtypes of FixedArray */ \
V(Context) \
V(ObjectBoilerplateDescription) \
V(ScopeInfo) \
V(ScriptContextTable) \
/* Subtypes of FixedArrayBase */ \
@ -91,7 +93,6 @@ enum class OddballType : uint8_t {
/* Subtypes of HeapObject */ \
V(AccessorInfo) \
V(AllocationSite) \
V(ArrayBoilerplateDescription) \
V(BigInt) \
V(CallHandlerInfo) \
V(Cell) \

19
src/compiler/js-heap-broker.cc
View File

@ -571,7 +571,9 @@ class ArrayBoilerplateDescriptionData : public HeapObjectData {
ArrayBoilerplateDescriptionData(JSHeapBroker* broker, ObjectData** storage,
Handle<ArrayBoilerplateDescription> object)
: HeapObjectData(broker, storage, object),
constants_elements_length_(object->constant_elements().length()) {}
constants_elements_length_(object->constant_elements().length()) {
DCHECK(!FLAG_turbo_direct_heap_access);
}
int constants_elements_length() const { return constants_elements_length_; }
@ -583,7 +585,9 @@ class ObjectBoilerplateDescriptionData : public HeapObjectData {
public:
ObjectBoilerplateDescriptionData(JSHeapBroker* broker, ObjectData** storage,
Handle<ObjectBoilerplateDescription> object)
: HeapObjectData(broker, storage, object), size_(object->size()) {}
: HeapObjectData(broker, storage, object), size_(object->size()) {
DCHECK(!FLAG_turbo_direct_heap_access);
}
int size() const { return size_; }
@ -3187,15 +3191,6 @@ int ArrayBoilerplateDescriptionRef::constants_elements_length() const {
return data()->AsArrayBoilerplateDescription()->constants_elements_length();
}
int ObjectBoilerplateDescriptionRef::size() const {
if (data_->should_access_heap()) {
AllowHandleDereferenceIfNeeded allow_handle_dereference(data()->kind(),
broker()->mode());
return object()->size();
}
return data()->AsObjectBoilerplateDescription()->size();
}
ObjectRef FixedArrayRef::get(int i) const {
if (data_->should_access_heap()) {
AllowHandleAllocationIfNeeded allow_handle_allocation(data()->kind(),
@ -3413,6 +3408,8 @@ BIMODAL_ACCESSOR_C(Code, unsigned, inlined_bytecode_size)
BROKER_NATIVE_CONTEXT_FIELDS(DEF_NATIVE_CONTEXT_ACCESSOR)
#undef DEF_NATIVE_CONTEXT_ACCESSOR
BIMODAL_ACCESSOR_C(ObjectBoilerplateDescription, int, size)
BIMODAL_ACCESSOR(PropertyCell, Object, value)
BIMODAL_ACCESSOR_C(PropertyCell, PropertyDetails, property_details)