Move handler compilers to handler-compiler

src/ic/handler-compiler.cc

+// 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/v8.h"
+
+#include "src/ic/call-optimization.h"
+#include "src/ic/handler-compiler.h"
+#include "src/ic/ic-inl.h"
+
+namespace v8 {
+namespace internal {
+
+
+Handle<Code> PropertyHandlerCompiler::Find(Handle<Name> name,
+                                           Handle<Map> stub_holder,
+                                           Code::Kind kind,
+                                           CacheHolderFlag cache_holder,
+                                           Code::StubType type) {
+  Code::Flags flags = Code::ComputeHandlerFlags(kind, type, cache_holder);
+  Object* probe = stub_holder->FindInCodeCache(*name, flags);
+  if (probe->IsCode()) return handle(Code::cast(probe));
+  return Handle<Code>::null();
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::ComputeLoadNonexistent(
+    Handle<Name> name, Handle<HeapType> type) {
+  Isolate* isolate = name->GetIsolate();
+  Handle<Map> receiver_map = IC::TypeToMap(*type, isolate);
+  if (receiver_map->prototype()->IsNull()) {
+    // TODO(jkummerow/verwaest): If there is no prototype and the property
+    // is nonexistent, introduce a builtin to handle this (fast properties
+    // -> return undefined, dictionary properties -> do negative lookup).
+    return Handle<Code>();
+  }
+  CacheHolderFlag flag;
+  Handle<Map> stub_holder_map =
+      IC::GetHandlerCacheHolder(*type, false, isolate, &flag);
+
+  // If no dictionary mode objects are present in the prototype chain, the load
+  // nonexistent IC stub can be shared for all names for a given map and we use
+  // the empty string for the map cache in that case. If there are dictionary
+  // mode objects involved, we need to do negative lookups in the stub and
+  // therefore the stub will be specific to the name.
+  Handle<Name> cache_name =
+      receiver_map->is_dictionary_map()
+          ? name
+          : Handle<Name>::cast(isolate->factory()->nonexistent_symbol());
+  Handle<Map> current_map = stub_holder_map;
+  Handle<JSObject> last(JSObject::cast(receiver_map->prototype()));
+  while (true) {
+    if (current_map->is_dictionary_map()) cache_name = name;
+    if (current_map->prototype()->IsNull()) break;
+    last = handle(JSObject::cast(current_map->prototype()));
+    current_map = handle(last->map());
+  }
+  // Compile the stub that is either shared for all names or
+  // name specific if there are global objects involved.
+  Handle<Code> handler = PropertyHandlerCompiler::Find(
+      cache_name, stub_holder_map, Code::LOAD_IC, flag, Code::FAST);
+  if (!handler.is_null()) return handler;
+
+  NamedLoadHandlerCompiler compiler(isolate, type, last, flag);
+  handler = compiler.CompileLoadNonexistent(cache_name);
+  Map::UpdateCodeCache(stub_holder_map, cache_name, handler);
+  return handler;
+}
+
+
+Handle<Code> PropertyHandlerCompiler::GetCode(Code::Kind kind,
+                                              Code::StubType type,
+                                              Handle<Name> name) {
+  Code::Flags flags = Code::ComputeHandlerFlags(kind, type, cache_holder());
+  Handle<Code> code = GetCodeWithFlags(flags, name);
+  PROFILE(isolate(), CodeCreateEvent(Logger::STUB_TAG, *code, *name));
+  return code;
+}
+
+
+#define __ ACCESS_MASM(masm())
+
+
+Register NamedLoadHandlerCompiler::FrontendHeader(Register object_reg,
+                                                  Handle<Name> name,
+                                                  Label* miss) {
+  PrototypeCheckType check_type = CHECK_ALL_MAPS;
+  int function_index = -1;
+  if (type()->Is(HeapType::String())) {
+    function_index = Context::STRING_FUNCTION_INDEX;
+  } else if (type()->Is(HeapType::Symbol())) {
+    function_index = Context::SYMBOL_FUNCTION_INDEX;
+  } else if (type()->Is(HeapType::Number())) {
+    function_index = Context::NUMBER_FUNCTION_INDEX;
+  } else if (type()->Is(HeapType::Boolean())) {
+    function_index = Context::BOOLEAN_FUNCTION_INDEX;
+  } else {
+    check_type = SKIP_RECEIVER;
+  }
+
+  if (check_type == CHECK_ALL_MAPS) {
+    GenerateDirectLoadGlobalFunctionPrototype(masm(), function_index,
+                                              scratch1(), miss);
+    Object* function = isolate()->native_context()->get(function_index);
+    Object* prototype = JSFunction::cast(function)->instance_prototype();
+    set_type_for_object(handle(prototype, isolate()));
+    object_reg = scratch1();
+  }
+
+  // Check that the maps starting from the prototype haven't changed.
+  return CheckPrototypes(object_reg, scratch1(), scratch2(), scratch3(), name,
+                         miss, check_type);
+}
+
+
+// Frontend for store uses the name register. It has to be restored before a
+// miss.
+Register NamedStoreHandlerCompiler::FrontendHeader(Register object_reg,
+                                                   Handle<Name> name,
+                                                   Label* miss) {
+  return CheckPrototypes(object_reg, this->name(), scratch1(), scratch2(), name,
+                         miss, SKIP_RECEIVER);
+}
+
+
+Register PropertyHandlerCompiler::Frontend(Register object_reg,
+                                           Handle<Name> name) {
+  Label miss;
+  Register reg = FrontendHeader(object_reg, name, &miss);
+  FrontendFooter(name, &miss);
+  return reg;
+}
+
+
+void PropertyHandlerCompiler::NonexistentFrontendHeader(Handle<Name> name,
+                                                        Label* miss,
+                                                        Register scratch1,
+                                                        Register scratch2) {
+  Register holder_reg;
+  Handle<Map> last_map;
+  if (holder().is_null()) {
+    holder_reg = receiver();
+    last_map = IC::TypeToMap(*type(), isolate());
+    // If |type| has null as its prototype, |holder()| is
+    // Handle<JSObject>::null().
+    DCHECK(last_map->prototype() == isolate()->heap()->null_value());
+  } else {
+    holder_reg = FrontendHeader(receiver(), name, miss);
+    last_map = handle(holder()->map());
+  }
+
+  if (last_map->is_dictionary_map()) {
+    if (last_map->IsJSGlobalObjectMap()) {
+      Handle<JSGlobalObject> global =
+          holder().is_null()
+              ? Handle<JSGlobalObject>::cast(type()->AsConstant()->Value())
+              : Handle<JSGlobalObject>::cast(holder());
+      GenerateCheckPropertyCell(masm(), global, name, scratch1, miss);
+    } else {
+      if (!name->IsUniqueName()) {
+        DCHECK(name->IsString());
+        name = factory()->InternalizeString(Handle<String>::cast(name));
+      }
+      DCHECK(holder().is_null() ||
+             holder()->property_dictionary()->FindEntry(name) ==
+                 NameDictionary::kNotFound);
+      GenerateDictionaryNegativeLookup(masm(), miss, holder_reg, name, scratch1,
+                                       scratch2);
+    }
+  }
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::CompileLoadField(Handle<Name> name,
+                                                        FieldIndex field) {
+  Register reg = Frontend(receiver(), name);
+  __ Move(receiver(), reg);
+  LoadFieldStub stub(isolate(), field);
+  GenerateTailCall(masm(), stub.GetCode());
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::CompileLoadConstant(Handle<Name> name,
+                                                           int constant_index) {
+  Register reg = Frontend(receiver(), name);
+  __ Move(receiver(), reg);
+  LoadConstantStub stub(isolate(), constant_index);
+  GenerateTailCall(masm(), stub.GetCode());
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::CompileLoadNonexistent(
+    Handle<Name> name) {
+  Label miss;
+  NonexistentFrontendHeader(name, &miss, scratch2(), scratch3());
+  GenerateLoadConstant(isolate()->factory()->undefined_value());
+  FrontendFooter(name, &miss);
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
+    Handle<Name> name, Handle<ExecutableAccessorInfo> callback) {
+  Register reg = Frontend(receiver(), name);
+  GenerateLoadCallback(reg, callback);
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
+    Handle<Name> name, const CallOptimization& call_optimization) {
+  DCHECK(call_optimization.is_simple_api_call());
+  Frontend(receiver(), name);
+  Handle<Map> receiver_map = IC::TypeToMap(*type(), isolate());
+  GenerateFastApiCall(masm(), call_optimization, receiver_map, receiver(),
+                      scratch1(), false, 0, NULL);
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::CompileLoadInterceptor(
+    LookupIterator* it) {
+  // So far the most popular follow ups for interceptor loads are FIELD and
+  // ExecutableAccessorInfo, so inline only them. Other cases may be added
+  // later.
+  bool inline_followup = it->state() == LookupIterator::PROPERTY;
+  if (inline_followup) {
+    switch (it->property_kind()) {
+      case LookupIterator::DATA:
+        inline_followup = it->property_details().type() == FIELD;
+        break;
+      case LookupIterator::ACCESSOR: {
+        Handle<Object> accessors = it->GetAccessors();
+        inline_followup = accessors->IsExecutableAccessorInfo();
+        if (!inline_followup) break;
+        Handle<ExecutableAccessorInfo> info =
+            Handle<ExecutableAccessorInfo>::cast(accessors);
+        inline_followup = info->getter() != NULL &&
+                          ExecutableAccessorInfo::IsCompatibleReceiverType(
+                              isolate(), info, type());
+      }
+    }
+  }
+
+  Register reg = Frontend(receiver(), it->name());
+  if (inline_followup) {
+    // TODO(368): Compile in the whole chain: all the interceptors in
+    // prototypes and ultimate answer.
+    GenerateLoadInterceptorWithFollowup(it, reg);
+  } else {
+    GenerateLoadInterceptor(reg);
+  }
+  return GetCode(kind(), Code::FAST, it->name());
+}
+
+
+void NamedLoadHandlerCompiler::GenerateLoadPostInterceptor(
+    LookupIterator* it, Register interceptor_reg) {
+  Handle<JSObject> real_named_property_holder(it->GetHolder<JSObject>());
+
+  set_type_for_object(holder());
+  set_holder(real_named_property_holder);
+  Register reg = Frontend(interceptor_reg, it->name());
+
+  switch (it->property_kind()) {
+    case LookupIterator::DATA: {
+      DCHECK_EQ(FIELD, it->property_details().type());
+      __ Move(receiver(), reg);
+      LoadFieldStub stub(isolate(), it->GetFieldIndex());
+      GenerateTailCall(masm(), stub.GetCode());
+      break;
+    }
+    case LookupIterator::ACCESSOR:
+      Handle<ExecutableAccessorInfo> info =
+          Handle<ExecutableAccessorInfo>::cast(it->GetAccessors());
+      DCHECK_NE(NULL, info->getter());
+      GenerateLoadCallback(reg, info);
+  }
+}
+
+
+Handle<Code> NamedLoadHandlerCompiler::CompileLoadViaGetter(
+    Handle<Name> name, Handle<JSFunction> getter) {
+  Frontend(receiver(), name);
+  GenerateLoadViaGetter(masm(), type(), receiver(), getter);
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+// TODO(verwaest): Cleanup. holder() is actually the receiver.
+Handle<Code> NamedStoreHandlerCompiler::CompileStoreTransition(
+    Handle<Map> transition, Handle<Name> name) {
+  Label miss, slow;
+
+  // Ensure no transitions to deprecated maps are followed.
+  __ CheckMapDeprecated(transition, scratch1(), &miss);
+
+  // Check that we are allowed to write this.
+  bool is_nonexistent = holder()->map() == transition->GetBackPointer();
+  if (is_nonexistent) {
+    // Find the top object.
+    Handle<JSObject> last;
+    PrototypeIterator iter(isolate(), holder());
+    while (!iter.IsAtEnd()) {
+      last = Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
+      iter.Advance();
+    }
+    if (!last.is_null()) set_holder(last);
+    NonexistentFrontendHeader(name, &miss, scratch1(), scratch2());
+  } else {
+    FrontendHeader(receiver(), name, &miss);
+    DCHECK(holder()->HasFastProperties());
+  }
+
+  GenerateStoreTransition(transition, name, receiver(), this->name(), value(),
+                          scratch1(), scratch2(), scratch3(), &miss, &slow);
+
+  GenerateRestoreName(&miss, name);
+  TailCallBuiltin(masm(), MissBuiltin(kind()));
+
+  GenerateRestoreName(&slow, name);
+  TailCallBuiltin(masm(), SlowBuiltin(kind()));
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+Handle<Code> NamedStoreHandlerCompiler::CompileStoreField(LookupIterator* it) {
+  Label miss;
+  GenerateStoreField(it, value(), &miss);
+  __ bind(&miss);
+  TailCallBuiltin(masm(), MissBuiltin(kind()));
+  return GetCode(kind(), Code::FAST, it->name());
+}
+
+
+Handle<Code> NamedStoreHandlerCompiler::CompileStoreViaSetter(
+    Handle<JSObject> object, Handle<Name> name, Handle<JSFunction> setter) {
+  Frontend(receiver(), name);
+  GenerateStoreViaSetter(masm(), type(), receiver(), setter);
+
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback(
+    Handle<JSObject> object, Handle<Name> name,
+    const CallOptimization& call_optimization) {
+  Frontend(receiver(), name);
+  Register values[] = {value()};
+  GenerateFastApiCall(masm(), call_optimization, handle(object->map()),
+                      receiver(), scratch1(), true, 1, values);
+  return GetCode(kind(), Code::FAST, name);
+}
+
+
+#undef __
+
+
+void ElementHandlerCompiler::CompileElementHandlers(
+    MapHandleList* receiver_maps, CodeHandleList* handlers) {
+  for (int i = 0; i < receiver_maps->length(); ++i) {
+    Handle<Map> receiver_map = receiver_maps->at(i);
+    Handle<Code> cached_stub;
+
+    if ((receiver_map->instance_type() & kNotStringTag) == 0) {
+      cached_stub = isolate()->builtins()->KeyedLoadIC_String();
+    } else if (receiver_map->instance_type() < FIRST_JS_RECEIVER_TYPE) {
+      cached_stub = isolate()->builtins()->KeyedLoadIC_Slow();
+    } else {
+      bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
+      ElementsKind elements_kind = receiver_map->elements_kind();
+
+      if (IsFastElementsKind(elements_kind) ||
+          IsExternalArrayElementsKind(elements_kind) ||
+          IsFixedTypedArrayElementsKind(elements_kind)) {
+        cached_stub = LoadFastElementStub(isolate(), is_js_array, elements_kind)
+                          .GetCode();
+      } else if (elements_kind == SLOPPY_ARGUMENTS_ELEMENTS) {
+        cached_stub = isolate()->builtins()->KeyedLoadIC_SloppyArguments();
+      } else {
+        DCHECK(elements_kind == DICTIONARY_ELEMENTS);
+        cached_stub = LoadDictionaryElementStub(isolate()).GetCode();
+      }
+    }
+
+    handlers->Add(cached_stub);
+  }
+}
+
+
+void ElementHandlerCompiler::GenerateStoreDictionaryElement(
+    MacroAssembler* masm) {
+  KeyedStoreIC::GenerateSlow(masm);
+}
+}
+}  // namespace v8::internal