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// Copyright 2014 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/ic/ic-compiler.h"
#include "src/ic/handler-compiler.h"
#include "src/ic/ic-inl.h"
namespace v8 {
namespace internal {
Handle<Object> PropertyICCompiler::ComputeKeyedStoreMonomorphicHandler(
Handle<Map> receiver_map, KeyedAccessStoreMode store_mode) {
Isolate* isolate = receiver_map->GetIsolate();
DCHECK(store_mode == STANDARD_STORE ||
store_mode == STORE_AND_GROW_NO_TRANSITION ||
store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS ||
store_mode == STORE_NO_TRANSITION_HANDLE_COW);
PropertyICCompiler compiler(isolate);
Handle<Object> handler =
compiler.CompileKeyedStoreMonomorphicHandler(receiver_map, store_mode);
return handler;
}
void PropertyICCompiler::ComputeKeyedStorePolymorphicHandlers(
MapHandleList* receiver_maps, MapHandleList* transitioned_maps,
List<Handle<Object>>* handlers, KeyedAccessStoreMode store_mode) {
Isolate* isolate = receiver_maps->at(0)->GetIsolate();
DCHECK(store_mode == STANDARD_STORE ||
store_mode == STORE_AND_GROW_NO_TRANSITION ||
store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS ||
store_mode == STORE_NO_TRANSITION_HANDLE_COW);
PropertyICCompiler compiler(isolate);
compiler.CompileKeyedStorePolymorphicHandlers(
receiver_maps, transitioned_maps, handlers, store_mode);
}
void PropertyICCompiler::CompileKeyedStorePolymorphicHandlers(
MapHandleList* receiver_maps, MapHandleList* transitioned_maps,
List<Handle<Object>>* handlers, KeyedAccessStoreMode store_mode) {
for (int i = 0; i < receiver_maps->length(); ++i) {
Handle<Map> receiver_map(receiver_maps->at(i));
Handle<Object> handler;
Handle<Map> transitioned_map;
{
Map* tmap = receiver_map->FindElementsKindTransitionedMap(receiver_maps);
if (tmap != nullptr) transitioned_map = handle(tmap);
}
// TODO(mvstanton): The code below is doing pessimistic elements
// transitions. I would like to stop doing that and rely on Allocation Site
// Tracking to do a better job of ensuring the data types are what they need
// to be. Not all the elements are in place yet, pessimistic elements
// transitions are still important for performance.
if (!transitioned_map.is_null()) {
bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
ElementsKind elements_kind = receiver_map->elements_kind();
TRACE_HANDLER_STATS(isolate(),
KeyedStoreIC_ElementsTransitionAndStoreStub);
Handle<Code> stub =
ElementsTransitionAndStoreStub(isolate(), elements_kind,
transitioned_map->elements_kind(),
is_js_array, store_mode)
.GetCode();
Handle<Object> validity_cell =
Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate());
if (validity_cell.is_null()) {
handler = stub;
} else {
handler = isolate()->factory()->NewTuple2(validity_cell, stub);
}
} else if (receiver_map->instance_type() < FIRST_JS_RECEIVER_TYPE) {
// TODO(mvstanton): Consider embedding store_mode in the state of the slow
// keyed store ic for uniformity.
TRACE_HANDLER_STATS(isolate(), KeyedStoreIC_SlowStub);
handler = isolate()->builtins()->KeyedStoreIC_Slow();
} else {
handler = CompileKeyedStoreMonomorphicHandler(receiver_map, store_mode);
}
DCHECK(!handler.is_null());
handlers->Add(handler);
transitioned_maps->Add(transitioned_map);
}
}
#define __ ACCESS_MASM(masm())
Handle<Object> PropertyICCompiler::CompileKeyedStoreMonomorphicHandler(
Handle<Map> receiver_map, KeyedAccessStoreMode store_mode) {
ElementsKind elements_kind = receiver_map->elements_kind();
bool is_jsarray = receiver_map->instance_type() == JS_ARRAY_TYPE;
Handle<Code> stub;
if (receiver_map->has_sloppy_arguments_elements()) {
TRACE_HANDLER_STATS(isolate(), KeyedStoreIC_KeyedStoreSloppyArgumentsStub);
stub = KeyedStoreSloppyArgumentsStub(isolate(), store_mode).GetCode();
} else if (receiver_map->has_fast_elements() ||
receiver_map->has_fixed_typed_array_elements()) {
TRACE_HANDLER_STATS(isolate(), KeyedStoreIC_StoreFastElementStub);
stub = StoreFastElementStub(isolate(), is_jsarray, elements_kind,
store_mode).GetCode();
} else {
TRACE_HANDLER_STATS(isolate(), KeyedStoreIC_StoreElementStub);
stub = StoreElementStub(isolate(), elements_kind, store_mode).GetCode();
}
Handle<Object> validity_cell =
Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate());
if (validity_cell.is_null()) {
return stub;
}
return isolate()->factory()->NewTuple2(validity_cell, stub);
}
#undef __
} // namespace internal
} // namespace v8
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