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Unified Diff: src/hydrogen.cc

Issue 14174002: Added non observable side effects scope and removed unnecessary calls to AddSimulate. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 8 months ago
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Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index d9d1a68d0fb33db1086e4b2c8bab6a34c6c4ce53..5e36f68684f28e9556b8e90e2cbbc9d1253c36d4 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -887,6 +887,9 @@ HGraph* HGraphBuilder::CreateGraph() {
HInstruction* HGraphBuilder::AddInstruction(HInstruction* instr) {
ASSERT(current_block() != NULL);
current_block()->AddInstruction(instr);
+ if (no_side_effects_scope_count_ > 0) {
+ instr->SetFlag(HValue::kHasNoObservableSideEffects);
+ }
return instr;
}
@@ -894,6 +897,7 @@ HInstruction* HGraphBuilder::AddInstruction(HInstruction* instr) {
void HGraphBuilder::AddSimulate(BailoutId id,
RemovableSimulate removable) {
ASSERT(current_block() != NULL);
+ ASSERT(no_side_effects_scope_count_ == 0);
current_block()->AddSimulate(id, removable);
environment()->set_previous_ast_id(id);
}
@@ -1041,7 +1045,6 @@ HValue* HGraphBuilder::BuildCheckForCapacityGrow(HValue* object,
HValue* length,
HValue* key,
bool is_js_array) {
- BailoutId ast_id = environment()->previous_ast_id();
Zone* zone = this->zone();
IfBuilder length_checker(this);
@@ -1074,7 +1077,6 @@ HValue* HGraphBuilder::BuildCheckForCapacityGrow(HValue* object,
HAdd::New(zone, context, length, graph_->GetConstant1()));
new_length->ChangeRepresentation(Representation::Integer32());
new_length->ClearFlag(HValue::kCanOverflow);
- AddSimulate(ast_id, REMOVABLE_SIMULATE);
Factory* factory = isolate()->factory();
HInstruction* length_store = AddInstruction(new(zone) HStoreNamedField(
@@ -1083,7 +1085,6 @@ HValue* HGraphBuilder::BuildCheckForCapacityGrow(HValue* object,
new_length, true,
JSArray::kLengthOffset));
length_store->SetGVNFlag(kChangesArrayLengths);
- AddSimulate(ast_id, REMOVABLE_SIMULATE);
}
length_checker.BeginElse();
@@ -1210,6 +1211,8 @@ HInstruction* HGraphBuilder::BuildUncheckedMonomorphicElementAccess(
}
if (IsGrowStoreMode(store_mode)) {
+ NoObservableSideEffectsScope no_effects(this);
+
elements = BuildCheckForCapacityGrow(object, elements, elements_kind,
length, key, is_js_array);
checked_key = key;
@@ -1219,6 +1222,8 @@ HInstruction* HGraphBuilder::BuildUncheckedMonomorphicElementAccess(
if (is_store && (fast_elements || fast_smi_only_elements)) {
if (store_mode == STORE_NO_TRANSITION_HANDLE_COW) {
+ NoObservableSideEffectsScope no_effects(this);
+
elements = BuildCopyElementsOnWrite(object, elements, elements_kind,
length);
} else {
@@ -1292,7 +1297,6 @@ void HGraphBuilder::BuildInitializeElements(HValue* elements,
new(zone) HStoreNamedField(elements, fixed_array_length_field_name,
capacity, true, FixedArray::kLengthOffset);
AddInstruction(store_length);
- AddSimulate(ast_id, REMOVABLE_SIMULATE);
}
@@ -1317,7 +1321,6 @@ HInstruction* HGraphBuilder::BuildStoreMap(HValue* object,
true, JSObject::kMapOffset);
store_map->SetGVNFlag(kChangesMaps);
AddInstruction(store_map);
- AddSimulate(id, REMOVABLE_SIMULATE);
return store_map;
}
@@ -1410,7 +1413,6 @@ void HGraphBuilder::BuildFillElementsWithHole(HValue* context,
ElementsKind elements_kind,
HValue* from,
HValue* to) {
- BailoutId ast_id = current_block()->last_environment()->previous_ast_id();
// Fast elements kinds need to be initialized in case statements below cause
// a garbage collection.
Factory* factory = isolate()->factory();
@@ -1428,7 +1430,6 @@ void HGraphBuilder::BuildFillElementsWithHole(HValue* context,
HValue* key = builder.BeginBody(from, to, Token::LT);
AddInstruction(new(zone) HStoreKeyed(elements, key, hole, elements_kind));
- AddSimulate(ast_id, REMOVABLE_SIMULATE);
builder.EndBody();
}
@@ -1441,7 +1442,6 @@ void HGraphBuilder::BuildCopyElements(HValue* context,
ElementsKind to_elements_kind,
HValue* length,
HValue* capacity) {
- BailoutId ast_id = environment()->previous_ast_id();
bool pre_fill_with_holes =
IsFastDoubleElementsKind(from_elements_kind) &&
IsFastObjectElementsKind(to_elements_kind);
@@ -1465,7 +1465,6 @@ void HGraphBuilder::BuildCopyElements(HValue* context,
AddInstruction(new(zone()) HStoreKeyed(to_elements, key, element,
to_elements_kind));
- AddSimulate(ast_id, REMOVABLE_SIMULATE);
builder.EndBody();
@@ -1486,6 +1485,8 @@ HValue* HGraphBuilder::BuildCloneShallowArray(HContext* context,
Zone* zone = this->zone();
Factory* factory = isolate()->factory();
+ NoObservableSideEffectsScope no_effects(this);
+
// All sizes here are multiples of kPointerSize.
int size = JSArray::kSize;
if (mode == TRACK_ALLOCATION_SITE) {
@@ -1524,7 +1525,6 @@ HValue* HGraphBuilder::BuildCloneShallowArray(HContext* context,
factory->empty_string(),
value,
true, i));
- AddSimulate(id);
} else {
BuildStoreMap(object, value, id);
}
@@ -1542,7 +1542,6 @@ HValue* HGraphBuilder::BuildCloneShallowArray(HContext* context,
factory->empty_string(),
boilerplate,
true, alloc_payload_offset));
- AddSimulate(id);
}
if (length > 0) {
@@ -1556,7 +1555,6 @@ HValue* HGraphBuilder::BuildCloneShallowArray(HContext* context,
factory->elements_field_string(),
object_elements,
true, JSObject::kElementsOffset));
- AddSimulate(id);
// Copy the elements array header.
for (int i = 0; i < FixedArrayBase::kHeaderSize; i += kPointerSize) {
@@ -1567,7 +1565,6 @@ HValue* HGraphBuilder::BuildCloneShallowArray(HContext* context,
factory->empty_string(),
value,
true, i));
- AddSimulate(id);
}
// Copy the elements array contents.
@@ -1586,7 +1583,6 @@ HValue* HGraphBuilder::BuildCloneShallowArray(HContext* context,
key_constant,
value,
kind));
- AddSimulate(id);
}
}
@@ -10099,6 +10095,8 @@ HInstruction* HOptimizedGraphBuilder::BuildFastLiteral(
BailoutId id) {
Zone* zone = this->zone();
+ NoObservableSideEffectsScope no_effects(this);
+
HValue* size_in_bytes =
AddInstruction(new(zone) HConstant(size, Representation::Integer32()));
HInstruction* result =
@@ -10172,7 +10170,6 @@ void HOptimizedGraphBuilder::BuildEmitDeepCopy(
AddInstruction(new(zone) HStoreNamedField(
object_properties, factory->unknown_field_string(), value_instruction,
true, boilerplate_object->GetInObjectPropertyOffset(i)));
- AddSimulate(id);
BuildEmitDeepCopy(value_object, original_value_object, target,
offset, DONT_TRACK_ALLOCATION_SITE, id);
} else {
@@ -10181,7 +10178,6 @@ void HOptimizedGraphBuilder::BuildEmitDeepCopy(
AddInstruction(new(zone) HStoreNamedField(
object_properties, factory->unknown_field_string(), value_instruction,
true, boilerplate_object->GetInObjectPropertyOffset(i)));
- AddSimulate(id);
}
}
@@ -10196,7 +10192,6 @@ void HOptimizedGraphBuilder::BuildEmitDeepCopy(
factory->payload_string(),
original_boilerplate,
true, alloc_payload_offset));
- AddSimulate(id);
}
if (object_elements != NULL) {
@@ -10220,7 +10215,6 @@ void HOptimizedGraphBuilder::BuildEmitDeepCopy(
boilerplate_elements, key_constant, NULL, kind));
AddInstruction(new(zone) HStoreKeyed(
object_elements, key_constant, value_instruction, kind));
- AddSimulate(id);
}
} else if (elements->IsFixedArray()) {
Handle<FixedArray> fast_elements = Handle<FixedArray>::cast(elements);
@@ -10238,7 +10232,6 @@ void HOptimizedGraphBuilder::BuildEmitDeepCopy(
AddInstruction(new(zone) HInnerAllocatedObject(target, *offset));
AddInstruction(new(zone) HStoreKeyed(
object_elements, key_constant, value_instruction, kind));
- AddSimulate(id);
BuildEmitDeepCopy(value_object, original_value_object, target,
offset, DONT_TRACK_ALLOCATION_SITE, id);
} else {
@@ -10247,7 +10240,6 @@ void HOptimizedGraphBuilder::BuildEmitDeepCopy(
boilerplate_elements, key_constant, NULL, kind));
AddInstruction(new(zone) HStoreKeyed(
object_elements, key_constant, value_instruction, kind));
- AddSimulate(id);
}
}
} else {
@@ -10291,7 +10283,6 @@ HValue* HOptimizedGraphBuilder::BuildCopyObjectHeader(
elements,
true, JSObject::kElementsOffset));
elements_store->SetGVNFlag(kChangesElementsPointer);
- AddSimulate(id);
Handle<Object> properties_field =
Handle<Object>(boilerplate_object->properties(), isolate());
@@ -10302,7 +10293,6 @@ HValue* HOptimizedGraphBuilder::BuildCopyObjectHeader(
factory->empty_string(),
properties,
true, JSObject::kPropertiesOffset));
- AddSimulate(id);
if (boilerplate_object->IsJSArray()) {
Handle<JSArray> boilerplate_array =
@@ -10317,7 +10307,6 @@ HValue* HOptimizedGraphBuilder::BuildCopyObjectHeader(
length,
true, JSArray::kLengthOffset));
length_store->SetGVNFlag(kChangesArrayLengths);
- AddSimulate(id);
}
return result;
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