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      1 // Copyright 2018 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "src/compiler/js-heap-copy-reducer.h"
      6 
      7 #include "src/compiler/common-operator.h"
      8 #include "src/compiler/js-heap-broker.h"
      9 #include "src/compiler/js-operator.h"
     10 #include "src/heap/factory-inl.h"
     11 #include "src/objects/map.h"
     12 #include "src/objects/scope-info.h"
     13 
     14 namespace v8 {
     15 namespace internal {
     16 namespace compiler {
     17 
     18 // In the functions below, we call the ObjectRef (or subclass) constructor in
     19 // order to trigger serialization if not yet done.
     20 
     21 JSHeapCopyReducer::JSHeapCopyReducer(JSHeapBroker* broker) : broker_(broker) {}
     22 
     23 JSHeapBroker* JSHeapCopyReducer::broker() { return broker_; }
     24 
     25 Reduction JSHeapCopyReducer::Reduce(Node* node) {
     26   switch (node->opcode()) {
     27     case IrOpcode::kHeapConstant: {
     28       ObjectRef(broker(), HeapConstantOf(node->op()));
     29       break;
     30     }
     31     case IrOpcode::kJSCreateArray: {
     32       CreateArrayParameters const& p = CreateArrayParametersOf(node->op());
     33       Handle<AllocationSite> site;
     34       if (p.site().ToHandle(&site)) AllocationSiteRef(broker(), site);
     35       break;
     36     }
     37     case IrOpcode::kJSCreateCatchContext: {
     38       ScopeInfoRef(broker(), ScopeInfoOf(node->op()));
     39       break;
     40     }
     41     case IrOpcode::kJSCreateClosure: {
     42       CreateClosureParameters const& p = CreateClosureParametersOf(node->op());
     43       SharedFunctionInfoRef(broker(), p.shared_info());
     44       HeapObjectRef(broker(), p.feedback_cell());
     45       HeapObjectRef(broker(), p.code());
     46       break;
     47     }
     48     case IrOpcode::kJSCreateEmptyLiteralArray: {
     49       // TODO(neis, jarin) Force serialization of the entire feedback vector
     50       // rather than just the one element.
     51       FeedbackParameter const& p = FeedbackParameterOf(node->op());
     52       FeedbackVectorRef(broker(), p.feedback().vector());
     53       Handle<Object> feedback(
     54           p.feedback().vector()->Get(p.feedback().slot())->ToObject(),
     55           broker()->isolate());
     56       ObjectRef(broker(), feedback);
     57       break;
     58     }
     59     case IrOpcode::kJSCreateFunctionContext: {
     60       CreateFunctionContextParameters const& p =
     61           CreateFunctionContextParametersOf(node->op());
     62       ScopeInfoRef(broker(), p.scope_info());
     63       break;
     64     }
     65     case IrOpcode::kJSCreateLiteralArray:
     66     case IrOpcode::kJSCreateLiteralObject: {
     67       CreateLiteralParameters const& p = CreateLiteralParametersOf(node->op());
     68       ObjectRef(broker(), p.feedback().vector());
     69       break;
     70     }
     71     case IrOpcode::kJSLoadNamed:
     72     case IrOpcode::kJSStoreNamed: {
     73       NamedAccess const& p = NamedAccessOf(node->op());
     74       NameRef(broker(), p.name());
     75       break;
     76     }
     77     default:
     78       break;
     79   }
     80   return NoChange();
     81 }
     82 
     83 }  // namespace compiler
     84 }  // namespace internal
     85 }  // namespace v8
     86