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      1 // Copyright 2016 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 #ifndef V8_COMPILER_JS_CREATE_LOWERING_H_
      6 #define V8_COMPILER_JS_CREATE_LOWERING_H_
      7 
      8 #include "src/base/compiler-specific.h"
      9 #include "src/compiler/graph-reducer.h"
     10 #include "src/globals.h"
     11 
     12 namespace v8 {
     13 namespace internal {
     14 
     15 // Forward declarations.
     16 class AllocationSiteUsageContext;
     17 class Factory;
     18 class JSRegExp;
     19 
     20 namespace compiler {
     21 
     22 // Forward declarations.
     23 class CommonOperatorBuilder;
     24 class CompilationDependencies;
     25 class JSGraph;
     26 class JSOperatorBuilder;
     27 class MachineOperatorBuilder;
     28 class SimplifiedOperatorBuilder;
     29 class SlackTrackingPrediction;
     30 
     31 // Lowers JSCreate-level operators to fast (inline) allocations.
     32 class V8_EXPORT_PRIVATE JSCreateLowering final
     33     : public NON_EXPORTED_BASE(AdvancedReducer) {
     34  public:
     35   JSCreateLowering(Editor* editor, CompilationDependencies* dependencies,
     36                    JSGraph* jsgraph, JSHeapBroker* js_heap_broker,
     37                    Handle<Context> native_context, Zone* zone)
     38       : AdvancedReducer(editor),
     39         dependencies_(dependencies),
     40         jsgraph_(jsgraph),
     41         js_heap_broker_(js_heap_broker),
     42         native_context_(native_context),
     43         zone_(zone) {}
     44   ~JSCreateLowering() final {}
     45 
     46   const char* reducer_name() const override { return "JSCreateLowering"; }
     47 
     48   Reduction Reduce(Node* node) final;
     49 
     50  private:
     51   Reduction ReduceJSCreate(Node* node);
     52   Reduction ReduceJSCreateArguments(Node* node);
     53   Reduction ReduceJSCreateArray(Node* node);
     54   Reduction ReduceJSCreateArrayIterator(Node* node);
     55   Reduction ReduceJSCreateCollectionIterator(Node* node);
     56   Reduction ReduceJSCreateBoundFunction(Node* node);
     57   Reduction ReduceJSCreateClosure(Node* node);
     58   Reduction ReduceJSCreateIterResultObject(Node* node);
     59   Reduction ReduceJSCreateStringIterator(Node* node);
     60   Reduction ReduceJSCreateKeyValueArray(Node* node);
     61   Reduction ReduceJSCreatePromise(Node* node);
     62   Reduction ReduceJSCreateLiteralArrayOrObject(Node* node);
     63   Reduction ReduceJSCreateEmptyLiteralObject(Node* node);
     64   Reduction ReduceJSCreateEmptyLiteralArray(Node* node);
     65   Reduction ReduceJSCreateLiteralRegExp(Node* node);
     66   Reduction ReduceJSCreateFunctionContext(Node* node);
     67   Reduction ReduceJSCreateWithContext(Node* node);
     68   Reduction ReduceJSCreateCatchContext(Node* node);
     69   Reduction ReduceJSCreateBlockContext(Node* node);
     70   Reduction ReduceJSCreateGeneratorObject(Node* node);
     71   Reduction ReduceNewArray(
     72       Node* node, Node* length, MapRef initial_map, PretenureFlag pretenure,
     73       const SlackTrackingPrediction& slack_tracking_prediction);
     74   Reduction ReduceNewArray(
     75       Node* node, Node* length, int capacity, MapRef initial_map,
     76       PretenureFlag pretenure,
     77       const SlackTrackingPrediction& slack_tracking_prediction);
     78   Reduction ReduceNewArray(
     79       Node* node, std::vector<Node*> values, MapRef initial_map,
     80       PretenureFlag pretenure,
     81       const SlackTrackingPrediction& slack_tracking_prediction);
     82   Reduction ReduceJSCreateObject(Node* node);
     83 
     84   Node* AllocateArguments(Node* effect, Node* control, Node* frame_state);
     85   Node* AllocateRestArguments(Node* effect, Node* control, Node* frame_state,
     86                               int start_index);
     87   Node* AllocateAliasedArguments(Node* effect, Node* control, Node* frame_state,
     88                                  Node* context,
     89                                  const SharedFunctionInfoRef& shared,
     90                                  bool* has_aliased_arguments);
     91   Node* AllocateAliasedArguments(Node* effect, Node* control, Node* context,
     92                                  Node* arguments_frame, Node* arguments_length,
     93                                  const SharedFunctionInfoRef& shared,
     94                                  bool* has_aliased_arguments);
     95   Node* AllocateElements(Node* effect, Node* control,
     96                          ElementsKind elements_kind, int capacity,
     97                          PretenureFlag pretenure);
     98   Node* AllocateElements(Node* effect, Node* control,
     99                          ElementsKind elements_kind, Node* capacity_and_length);
    100   Node* AllocateElements(Node* effect, Node* control,
    101                          ElementsKind elements_kind,
    102                          std::vector<Node*> const& values,
    103                          PretenureFlag pretenure);
    104   Node* AllocateFastLiteral(Node* effect, Node* control,
    105                             JSObjectRef boilerplate, PretenureFlag pretenure);
    106   Node* AllocateFastLiteralElements(Node* effect, Node* control,
    107                                     JSObjectRef boilerplate,
    108                                     PretenureFlag pretenure);
    109   Node* AllocateLiteralRegExp(Node* effect, Node* control,
    110                               JSRegExpRef boilerplate);
    111 
    112   Reduction ReduceNewArrayToStubCall(Node* node,
    113                                      base::Optional<AllocationSiteRef> site);
    114 
    115   Factory* factory() const;
    116   Graph* graph() const;
    117   JSGraph* jsgraph() const { return jsgraph_; }
    118   Isolate* isolate() const;
    119   Handle<Context> native_context() const { return native_context_; }
    120   NativeContextRef native_context_ref() const;
    121   CommonOperatorBuilder* common() const;
    122   SimplifiedOperatorBuilder* simplified() const;
    123   CompilationDependencies* dependencies() const { return dependencies_; }
    124   JSHeapBroker* js_heap_broker() const { return js_heap_broker_; }
    125   Zone* zone() const { return zone_; }
    126 
    127   CompilationDependencies* const dependencies_;
    128   JSGraph* const jsgraph_;
    129   JSHeapBroker* const js_heap_broker_;
    130   Handle<Context> const native_context_;
    131   Zone* const zone_;
    132 };
    133 
    134 }  // namespace compiler
    135 }  // namespace internal
    136 }  // namespace v8
    137 
    138 #endif  // V8_COMPILER_JS_CREATE_LOWERING_H_
    139