Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(325)

Unified Diff: src/heap/heap.cc

Issue 391693002: In-object double fields unboxing (for 64-bit only). (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Rebasing Created 6 years, 1 month ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « src/globals.h ('k') | src/heap/mark-compact.cc » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 9c57ea3bdb2a0ad16d97d0595c954aa37d20a097..12898d347bb0970f16f65e91442dd1e269b058ae 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -2308,8 +2308,13 @@ AllocationResult Heap::AllocatePartialMap(InstanceType instance_type,
reinterpret_cast<Map*>(result)->set_map(raw_unchecked_meta_map());
reinterpret_cast<Map*>(result)->set_instance_type(instance_type);
reinterpret_cast<Map*>(result)->set_instance_size(instance_size);
+ // Initialize to only containing tagged fields.
reinterpret_cast<Map*>(result)->set_visitor_id(
- StaticVisitorBase::GetVisitorId(instance_type, instance_size));
+ StaticVisitorBase::GetVisitorId(instance_type, instance_size, false));
+ if (FLAG_unbox_double_fields) {
+ reinterpret_cast<Map*>(result)
+ ->set_layout_descriptor(LayoutDescriptor::FastPointerLayout());
+ }
reinterpret_cast<Map*>(result)->set_inobject_properties(0);
reinterpret_cast<Map*>(result)->set_pre_allocated_property_fields(0);
reinterpret_cast<Map*>(result)->set_unused_property_fields(0);
@@ -2332,8 +2337,6 @@ AllocationResult Heap::AllocateMap(InstanceType instance_type,
result->set_map_no_write_barrier(meta_map());
Map* map = Map::cast(result);
map->set_instance_type(instance_type);
- map->set_visitor_id(
- StaticVisitorBase::GetVisitorId(instance_type, instance_size));
map->set_prototype(null_value(), SKIP_WRITE_BARRIER);
map->set_constructor(null_value(), SKIP_WRITE_BARRIER);
map->set_instance_size(instance_size);
@@ -2345,6 +2348,12 @@ AllocationResult Heap::AllocateMap(InstanceType instance_type,
map->init_back_pointer(undefined_value());
map->set_unused_property_fields(0);
map->set_instance_descriptors(empty_descriptor_array());
+ if (FLAG_unbox_double_fields) {
+ map->set_layout_descriptor(LayoutDescriptor::FastPointerLayout());
+ }
+ // Must be called only after |instance_type|, |instance_size| and
+ // |layout_descriptor| are set.
+ map->set_visitor_id(StaticVisitorBase::GetVisitorId(map));
map->set_bit_field(0);
map->set_bit_field2(1 << Map::kIsExtensible);
int bit_field3 = Map::EnumLengthBits::encode(kInvalidEnumCacheSentinel) |
@@ -2471,28 +2480,46 @@ bool Heap::CreateInitialMaps() {
meta_map()->set_dependent_code(DependentCode::cast(empty_fixed_array()));
meta_map()->init_back_pointer(undefined_value());
meta_map()->set_instance_descriptors(empty_descriptor_array());
+ if (FLAG_unbox_double_fields) {
+ meta_map()->set_layout_descriptor(LayoutDescriptor::FastPointerLayout());
+ }
fixed_array_map()->set_code_cache(empty_fixed_array());
fixed_array_map()->set_dependent_code(
DependentCode::cast(empty_fixed_array()));
fixed_array_map()->init_back_pointer(undefined_value());
fixed_array_map()->set_instance_descriptors(empty_descriptor_array());
+ if (FLAG_unbox_double_fields) {
+ fixed_array_map()->set_layout_descriptor(
+ LayoutDescriptor::FastPointerLayout());
+ }
undefined_map()->set_code_cache(empty_fixed_array());
undefined_map()->set_dependent_code(DependentCode::cast(empty_fixed_array()));
undefined_map()->init_back_pointer(undefined_value());
undefined_map()->set_instance_descriptors(empty_descriptor_array());
+ if (FLAG_unbox_double_fields) {
+ undefined_map()->set_layout_descriptor(
+ LayoutDescriptor::FastPointerLayout());
+ }
null_map()->set_code_cache(empty_fixed_array());
null_map()->set_dependent_code(DependentCode::cast(empty_fixed_array()));
null_map()->init_back_pointer(undefined_value());
null_map()->set_instance_descriptors(empty_descriptor_array());
+ if (FLAG_unbox_double_fields) {
+ null_map()->set_layout_descriptor(LayoutDescriptor::FastPointerLayout());
+ }
constant_pool_array_map()->set_code_cache(empty_fixed_array());
constant_pool_array_map()->set_dependent_code(
DependentCode::cast(empty_fixed_array()));
constant_pool_array_map()->init_back_pointer(undefined_value());
constant_pool_array_map()->set_instance_descriptors(empty_descriptor_array());
+ if (FLAG_unbox_double_fields) {
+ constant_pool_array_map()->set_layout_descriptor(
+ LayoutDescriptor::FastPointerLayout());
+ }
// Fix prototype object for existing maps.
meta_map()->set_prototype(null_value());
« no previous file with comments | « src/globals.h ('k') | src/heap/mark-compact.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698