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Select function map based on prototype and shared function info.

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BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/237963024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20840 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
verwaest@chromium.org 2014-04-17 11:50:22 +00:00
parent 59b3dc5812
commit 107a359080
2 changed files with 72 additions and 74 deletions
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122
src/factory.cc
View File

@ -975,35 +975,21 @@ Handle<ConstantPoolArray> Factory::CopyConstantPoolArray(
}
static Handle<Map> MapForNewFunction(Isolate *isolate,
Handle<SharedFunctionInfo> function_info) {
Context *context = isolate->context()->native_context();
int map_index = Context::FunctionMapIndex(function_info->strict_mode(),
function_info->is_generator());
return Handle<Map>(Map::cast(context->get(map_index)));
}
Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
Handle<SharedFunctionInfo> function_info,
Handle<SharedFunctionInfo> info,
Handle<Context> context,
PretenureFlag pretenure) {
Handle<JSFunction> result = NewFunctionHelper(
MapForNewFunction(isolate(), function_info),
function_info,
the_hole_value(),
pretenure);
Handle<JSFunction> result = NewFunction(
info, context, the_hole_value(), pretenure);
if (function_info->ic_age() != isolate()->heap()->global_ic_age()) {
function_info->ResetForNewContext(isolate()->heap()->global_ic_age());
if (info->ic_age() != isolate()->heap()->global_ic_age()) {
info->ResetForNewContext(isolate()->heap()->global_ic_age());
}
result->set_context(*context);
int index = function_info->SearchOptimizedCodeMap(context->native_context(),
int index = info->SearchOptimizedCodeMap(context->native_context(),
BailoutId::None());
if (!function_info->bound() && index < 0) {
int number_of_literals = function_info->num_literals();
if (!info->bound() && index < 0) {
int number_of_literals = info->num_literals();
Handle<FixedArray> literals = NewFixedArray(number_of_literals, pretenure);
if (number_of_literals > 0) {
// Store the native context in the literals array prefix. This
@ -1017,10 +1003,9 @@ Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
if (index > 0) {
// Caching of optimized code enabled and optimized code found.
FixedArray* literals =
function_info->GetLiteralsFromOptimizedCodeMap(index);
FixedArray* literals = info->GetLiteralsFromOptimizedCodeMap(index);
if (literals != NULL) result->set_literals(literals);
Code* code = function_info->GetCodeFromOptimizedCodeMap(index);
Code* code = info->GetCodeFromOptimizedCodeMap(index);
ASSERT(!code->marked_for_deoptimization());
result->ReplaceCode(code);
return result;
@ -1029,9 +1014,9 @@ Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
if (isolate()->use_crankshaft() &&
FLAG_always_opt &&
result->is_compiled() &&
!function_info->is_toplevel() &&
function_info->allows_lazy_compilation() &&
!function_info->optimization_disabled() &&
!info->is_toplevel() &&
info->allows_lazy_compilation() &&
!info->optimization_disabled() &&
!isolate()->DebuggerHasBreakPoints()) {
result->MarkForOptimization();
}
@ -1752,8 +1737,9 @@ void Factory::ReinitializeJSReceiver(Handle<JSReceiver> object,
if (type == JS_FUNCTION_TYPE) {
map->set_function_with_prototype(true);
Handle<JSFunction> js_function = Handle<JSFunction>::cast(object);
InitializeFunction(js_function, shared.ToHandleChecked(), the_hole_value());
js_function->set_context(isolate()->context()->native_context());
Handle<Context> context(isolate()->context()->native_context());
InitializeFunction(js_function, shared.ToHandleChecked(),
context, null_value());
}
// Put in filler if the new object is smaller than the old.
@ -1983,52 +1969,68 @@ Handle<UnseededNumberDictionary> Factory::DictionaryAtNumberPut(
void Factory::InitializeFunction(Handle<JSFunction> function,
Handle<SharedFunctionInfo> shared,
Handle<Object> prototype) {
ASSERT(!prototype->IsMap());
Handle<SharedFunctionInfo> info,
Handle<Context> context,
MaybeHandle<Object> maybe_prototype) {
function->initialize_properties();
function->initialize_elements();
function->set_shared(*shared);
function->set_code(shared->code());
function->set_shared(*info);
function->set_code(info->code());
function->set_context(*context);
Handle<Object> prototype;
if (maybe_prototype.ToHandle(&prototype)) {
ASSERT(!prototype->IsMap());
} else {
prototype = the_hole_value();
}
function->set_prototype_or_initial_map(*prototype);
function->set_context(*undefined_value());
function->set_literals_or_bindings(*empty_fixed_array());
function->set_next_function_link(*undefined_value());
}
Handle<JSFunction> Factory::NewFunctionHelper(Handle<Map> function_map,
Handle<SharedFunctionInfo> shared,
Handle<Object> prototype,
static Handle<Map> MapForNewFunction(Isolate* isolate,
Handle<SharedFunctionInfo> function_info,
MaybeHandle<Object> maybe_prototype) {
if (maybe_prototype.is_null()) {
return function_info->strict_mode() == SLOPPY
? isolate->sloppy_function_without_prototype_map()
: isolate->strict_function_without_prototype_map();
}
Context* context = isolate->context()->native_context();
int map_index = Context::FunctionMapIndex(function_info->strict_mode(),
function_info->is_generator());
return Handle<Map>(Map::cast(context->get(map_index)));
}
Handle<JSFunction> Factory::NewFunction(Handle<SharedFunctionInfo> info,
Handle<Context> context,
MaybeHandle<Object> maybe_prototype,
PretenureFlag pretenure) {
AllocationSpace space =
(pretenure == TENURED) ? OLD_POINTER_SPACE : NEW_SPACE;
Handle<JSFunction> fun = New<JSFunction>(function_map, space);
InitializeFunction(fun, shared, prototype);
return fun;
Handle<Map> map = MapForNewFunction(isolate(), info, maybe_prototype);
AllocationSpace space = pretenure == TENURED ? OLD_POINTER_SPACE : NEW_SPACE;
Handle<JSFunction> result = New<JSFunction>(map, space);
InitializeFunction(result, info, context, maybe_prototype);
return result;
}
Handle<JSFunction> Factory::NewFunction(Handle<String> name,
Handle<Object> prototype) {
Handle<SharedFunctionInfo> function_share = NewSharedFunctionInfo(name);
Handle<JSFunction> fun = NewFunctionHelper(
isolate()->sloppy_function_map(), function_share, prototype);
fun->set_context(isolate()->context()->native_context());
return fun;
Handle<SharedFunctionInfo> info = NewSharedFunctionInfo(name);
Handle<Context> context(isolate()->context()->native_context());
return NewFunction(info, context, prototype);
}
Handle<JSFunction> Factory::NewFunctionWithoutPrototype(
Handle<String> name,
StrictMode strict_mode) {
Handle<SharedFunctionInfo> function_share = NewSharedFunctionInfo(name);
Handle<Map> map = strict_mode == SLOPPY
? isolate()->sloppy_function_without_prototype_map()
: isolate()->strict_function_without_prototype_map();
Handle<JSFunction> fun =
NewFunctionHelper(map, function_share, the_hole_value());
fun->set_context(isolate()->context()->native_context());
Handle<SharedFunctionInfo> info = NewSharedFunctionInfo(name);
Handle<Context> context(isolate()->context()->native_context());
Handle<JSFunction> fun = NewFunction(info, context, MaybeHandle<Object>());
return fun;
}
@ -2111,12 +2113,8 @@ Handle<JSFunction> Factory::CreateApiFunction(
break;
}
Handle<JSFunction> result =
NewFunction(Factory::empty_string(),
type,
instance_size,
code,
true);
Handle<JSFunction> result = NewFunction(
Factory::empty_string(), type, instance_size, code, true);
// Set length.
result->shared()->set_length(obj->length());

18
src/factory.h
View File

@ -633,18 +633,18 @@ class Factory V8_FINAL {
Handle<AllocationSite> allocation_site);
// Initializes a function with a shared part and prototype.
// Note: this code was factored out of NewFunctionHelper such that
// other parts of the VM could use it. Specifically, a function that creates
// instances of type JS_FUNCTION_TYPE benefit from the use of this function.
// Note: this code was factored out of NewFunction such that other parts of
// the VM could use it. Specifically, a function that creates instances of
// type JS_FUNCTION_TYPE benefit from the use of this function.
inline void InitializeFunction(Handle<JSFunction> function,
Handle<SharedFunctionInfo> shared,
Handle<Object> prototype);
Handle<SharedFunctionInfo> info,
Handle<Context> context,
MaybeHandle<Object> maybe_prototype);
// Creates a function initialized with a shared part.
inline Handle<JSFunction> NewFunctionHelper(
Handle<Map> function_map,
Handle<SharedFunctionInfo> shared,
Handle<Object> prototype,
inline Handle<JSFunction> NewFunction(Handle<SharedFunctionInfo> info,
Handle<Context> context,
MaybeHandle<Object> maybe_prototype,
PretenureFlag pretenure = TENURED);
// Create a new map cache.