[turbofan] Rename JSGlobalSpecialization to JSNativeContextSpecialization.

src/compiler/js-native-context-specialization.cc

 // Copyright 2015 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/compiler/js-global-specialization.h"
+#include "src/compiler/js-native-context-specialization.h"
 
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/contexts.h"
 #include "src/field-index-inl.h"
 #include "src/lookup.h"
 #include "src/objects-inl.h"  // TODO(mstarzinger): Temporary cycle breaker!
 #include "src/type-feedback-vector.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
-struct JSGlobalSpecialization::ScriptContextTableLookupResult {
+struct JSNativeContextSpecialization::ScriptContextTableLookupResult {
   Handle<Context> context;
   bool immutable;
   int index;
 };
 
 
-JSGlobalSpecialization::JSGlobalSpecialization(
+JSNativeContextSpecialization::JSNativeContextSpecialization(
     Editor* editor, JSGraph* jsgraph, Flags flags,
     Handle<GlobalObject> global_object, CompilationDependencies* dependencies,
     Zone* zone)
     : AdvancedReducer(editor),
       jsgraph_(jsgraph),
       flags_(flags),
       global_object_(global_object),
       dependencies_(dependencies),
       zone_(zone) {}
 
 
-Reduction JSGlobalSpecialization::Reduce(Node* node) {
+Reduction JSNativeContextSpecialization::Reduce(Node* node) {
   switch (node->opcode()) {
     case IrOpcode::kJSLoadGlobal:
       return ReduceJSLoadGlobal(node);
     case IrOpcode::kJSStoreGlobal:
       return ReduceJSStoreGlobal(node);
     case IrOpcode::kJSLoadNamed:
       return ReduceJSLoadNamed(node);
     default:
       break;
   }
   return NoChange();
 }
 
 
-Reduction JSGlobalSpecialization::ReduceJSLoadGlobal(Node* node) {
+Reduction JSNativeContextSpecialization::ReduceJSLoadGlobal(Node* node) {
   DCHECK_EQ(IrOpcode::kJSLoadGlobal, node->opcode());
   Handle<Name> name = LoadGlobalParametersOf(node->op()).name();
   Node* effect = NodeProperties::GetEffectInput(node);
   Node* control = NodeProperties::GetControlInput(node);
 
   // Try to lookup the name on the script context table first (lexical scoping).
   ScriptContextTableLookupResult result;
   if (LookupInScriptContextTable(name, &result)) {
     Node* context = jsgraph()->Constant(result.context);
     Node* value = effect = graph()->NewNode(
@@ skipping 58 matching lines @@
     if (!(flags() & kDeoptimizationEnabled)) return NoChange();
     dependencies()->AssumePropertyCell(property_cell);
   }
   Node* value = effect = graph()->NewNode(
       simplified()->LoadField(AccessBuilder::ForPropertyCellValue()),
       jsgraph()->Constant(property_cell), effect, control);
   return Replace(node, value, effect);
 }
 
 
-Reduction JSGlobalSpecialization::ReduceJSStoreGlobal(Node* node) {
+Reduction JSNativeContextSpecialization::ReduceJSStoreGlobal(Node* node) {
   DCHECK_EQ(IrOpcode::kJSStoreGlobal, node->opcode());
   Handle<Name> name = StoreGlobalParametersOf(node->op()).name();
   Node* value = NodeProperties::GetValueInput(node, 2);
   Node* frame_state = NodeProperties::GetFrameStateInput(node, 1);
   Node* effect = NodeProperties::GetEffectInput(node);
   Node* control = NodeProperties::GetControlInput(node);
 
   // Try to lookup the name on the script context table first (lexical scoping).
   ScriptContextTableLookupResult result;
   if (LookupInScriptContextTable(name, &result)) {
@@ skipping 86 matching lines @@
   }
   effect = graph()->NewNode(
       simplified()->StoreField(AccessBuilder::ForPropertyCellValue()),
       jsgraph()->Constant(property_cell), value, effect, control);
   return Replace(node, value, effect, control);
 }
 
 
 // This class encapsulates all information required to access a certain
 // object property, either on the object itself or on the prototype chain.
-class JSGlobalSpecialization::PropertyAccessInfo final {
+class JSNativeContextSpecialization::PropertyAccessInfo final {
  public:
   enum Kind { kInvalid, kData, kDataConstant };
 
   static PropertyAccessInfo DataConstant(Type* receiver_type,
                                          Handle<Object> constant,
                                          MaybeHandle<JSObject> holder) {
     return PropertyAccessInfo(holder, constant, receiver_type);
   }
   static PropertyAccessInfo Data(Type* receiver_type, FieldIndex field_index,
                                  Representation field_representation,
@@ skipping 45 matching lines @@
   if (map->instance_type() < FIRST_NONSTRING_TYPE) return true;
   return map->IsJSObjectMap() && !map->is_dictionary_map() &&
          !map->has_named_interceptor() &&
          // TODO(verwaest): Whitelist contexts to which we have access.
          !map->is_access_check_needed();
 }
 
 }  // namespace
 
 
-bool JSGlobalSpecialization::ComputePropertyAccessInfo(
+bool JSNativeContextSpecialization::ComputePropertyAccessInfo(
     Handle<Map> map, Handle<Name> name, PropertyAccessInfo* access_info) {
   MaybeHandle<JSObject> holder;
   Type* receiver_type = Type::Class(map, graph()->zone());
   while (CanInlinePropertyAccess(map)) {
     // Lookup the named property on the {map}.
     Handle<DescriptorArray> descriptors(map->instance_descriptors(), isolate());
     int const number = descriptors->SearchWithCache(*name, *map);
     if (number != DescriptorArray::kNotFound) {
       PropertyDetails const details = descriptors->GetDetails(number);
       if (details.type() == DATA_CONSTANT) {
@@ skipping 33 matching lines @@
       // map into the optimized code.
       JSObject::TryMigrateInstance(map_prototype);
     }
     map = handle(map_prototype->map(), isolate());
     holder = map_prototype;
   }
   return false;
 }
 
 
-bool JSGlobalSpecialization::ComputePropertyAccessInfos(
+bool JSNativeContextSpecialization::ComputePropertyAccessInfos(
     MapHandleList const& maps, Handle<Name> name,
     ZoneVector<PropertyAccessInfo>* access_infos) {
   for (Handle<Map> map : maps) {
     PropertyAccessInfo access_info;
     if (!ComputePropertyAccessInfo(map, name, &access_info)) return false;
     access_infos->push_back(access_info);
   }
   return true;
 }
 
 
-Reduction JSGlobalSpecialization::ReduceJSLoadNamed(Node* node) {
+Reduction JSNativeContextSpecialization::ReduceJSLoadNamed(Node* node) {
   DCHECK_EQ(IrOpcode::kJSLoadNamed, node->opcode());
   LoadNamedParameters const p = LoadNamedParametersOf(node->op());
   Handle<Name> name = p.name();
   Node* receiver = NodeProperties::GetValueInput(node, 0);
   Node* frame_state = NodeProperties::GetFrameStateInput(node, 1);
   Node* effect = NodeProperties::GetEffectInput(node);
   Node* control = NodeProperties::GetControlInput(node);
 
   // Not much we can do if deoptimization support is disabled.
   if (!(flags() & kDeoptimizationEnabled)) return NoChange();
@@ skipping 162 matching lines @@
 
     // Remember the final state for this property access.
     values.push_back(this_value);
     effects.push_back(this_effect);
     controls.push_back(this_control);
   }
 
   // Collect the fallthru control as final "exit" control.
   exit_controls.push_back(fallthrough_control);
 
-  // TODO(bmeurer/mtrofin): Splintering cannot currently deal with deferred
-  // blocks that contain only a single non-deoptimize instruction (i.e. a
-  // jump). Generating a single Merge here, which joins all the deoptimizing
-  // controls would generate a lot of these basic blocks, however. So this
-  // is disabled for now until splintering is fixed.
+// TODO(bmeurer/mtrofin): Splintering cannot currently deal with deferred
+// blocks that contain only a single non-deoptimize instruction (i.e. a
+// jump). Generating a single Merge here, which joins all the deoptimizing
+// controls would generate a lot of these basic blocks, however. So this
+// is disabled for now until splintering is fixed.
 #if 0
   // Generate the single "exit" point, where we get if either all map/instance
   // type checks failed, or one of the assumptions inside one of the cases
   // failes (i.e. failing prototype chain check).
   // TODO(bmeurer): Consider falling back to IC here if deoptimization is
   // disabled.
   int const exit_control_count = static_cast<int>(exit_controls.size());
   Node* exit_control =
       (exit_control_count == 1)
           ? exit_controls.front()
@@ skipping 26 matching lines @@
     value = graph()->NewNode(common()->Phi(kMachAnyTagged, control_count),
                              control_count + 1, &values.front());
     effects.push_back(control);
     effect = graph()->NewNode(common()->EffectPhi(control_count),
                               control_count + 1, &effects.front());
   }
   return Replace(node, value, effect, control);
 }
 
 
-Reduction JSGlobalSpecialization::Replace(Node* node, Handle<Object> value) {
+Reduction JSNativeContextSpecialization::Replace(Node* node,
+                                                 Handle<Object> value) {
   return Replace(node, jsgraph()->Constant(value));
 }
 
 
-bool JSGlobalSpecialization::LookupInScriptContextTable(
+bool JSNativeContextSpecialization::LookupInScriptContextTable(
     Handle<Name> name, ScriptContextTableLookupResult* result) {
   if (!name->IsString()) return false;
   Handle<ScriptContextTable> script_context_table(
       global_object()->native_context()->script_context_table());
   ScriptContextTable::LookupResult lookup_result;
   if (!ScriptContextTable::Lookup(script_context_table,
                                   Handle<String>::cast(name), &lookup_result)) {
     return false;
   }
   Handle<Context> script_context = ScriptContextTable::GetContext(
       script_context_table, lookup_result.context_index);
   if (script_context->is_the_hole(lookup_result.slot_index)) return false;
   result->context = script_context;
   result->immutable = IsImmutableVariableMode(lookup_result.mode);
   result->index = lookup_result.slot_index;
   return true;
 }
 
 
-Graph* JSGlobalSpecialization::graph() const { return jsgraph()->graph(); }
+Graph* JSNativeContextSpecialization::graph() const {
+  return jsgraph()->graph();
+}
 
 
-Isolate* JSGlobalSpecialization::isolate() const {
+Isolate* JSNativeContextSpecialization::isolate() const {
   return jsgraph()->isolate();
 }
 
 
-MachineOperatorBuilder* JSGlobalSpecialization::machine() const {
+MachineOperatorBuilder* JSNativeContextSpecialization::machine() const {
   return jsgraph()->machine();
 }
 
 
-CommonOperatorBuilder* JSGlobalSpecialization::common() const {
+CommonOperatorBuilder* JSNativeContextSpecialization::common() const {
   return jsgraph()->common();
 }
 
 
-JSOperatorBuilder* JSGlobalSpecialization::javascript() const {
+JSOperatorBuilder* JSNativeContextSpecialization::javascript() const {
   return jsgraph()->javascript();
 }
 
 
-SimplifiedOperatorBuilder* JSGlobalSpecialization::simplified() const {
+SimplifiedOperatorBuilder* JSNativeContextSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8