[Interpreter] Implement ForIn in bytecode graph builder.

src/interpreter/bytecode-array-builder.h

 // 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.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include <vector>
 
 #include "src/ast/ast.h"
 #include "src/identity-map.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/zone.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 class Isolate;
 
 namespace interpreter {
 
 class BytecodeLabel;
 class Register;
 
 // TODO(rmcilroy): Unify this with CreateArgumentsParameters::Type in Turbofan
 // when rest parameters implementation has settled down.
 enum class CreateArgumentsType { kMappedArguments, kUnmappedArguments };
 
-class BytecodeArrayBuilder {
+class BytecodeArrayBuilder final {
  public:
   BytecodeArrayBuilder(Isolate* isolate, Zone* zone);
+  ~BytecodeArrayBuilder();
+
   Handle<BytecodeArray> ToBytecodeArray();
 
   // Set the number of parameters expected by function.
   void set_parameter_count(int number_of_params);
   int parameter_count() const {
     DCHECK_GE(parameter_count_, 0);
     return parameter_count_;
   }
 
   // Set the number of locals required for bytecode array.
@@ skipping 161 matching lines @@
   BytecodeArrayBuilder& Jump(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfTrue(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfFalse(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfNull(BytecodeLabel* label);
   BytecodeArrayBuilder& JumpIfUndefined(BytecodeLabel* label);
 
   BytecodeArrayBuilder& Throw();
   BytecodeArrayBuilder& Return();
 
   // Complex flow control.
-  BytecodeArrayBuilder& ForInPrepare(Register receiver);
-  BytecodeArrayBuilder& ForInNext(Register for_in_state, Register index);
-  BytecodeArrayBuilder& ForInDone(Register for_in_state);
+  BytecodeArrayBuilder& ForInPrepare(Register cache_type, Register cache_array,
+                                     Register cache_length);
+  BytecodeArrayBuilder& ForInDone(Register index, Register cache_length);
+  BytecodeArrayBuilder& ForInNext(Register receiver, Register cache_type,
+                                  Register cache_array, Register index);
+  BytecodeArrayBuilder& ForInStep(Register index);
 
   // Accessors
   Zone* zone() const { return zone_; }
 
  private:
   ZoneVector<uint8_t>* bytecodes() { return &bytecodes_; }
   const ZoneVector<uint8_t>* bytecodes() const { return &bytecodes_; }
   Isolate* isolate() const { return isolate_; }
 
   static Bytecode BytecodeForBinaryOperation(Token::Value op);
@@ skipping 54 matching lines @@
   Register first_temporary_register() const;
   Register last_temporary_register() const;
 
   Isolate* isolate_;
   Zone* zone_;
   ZoneVector<uint8_t> bytecodes_;
   bool bytecode_generated_;
   size_t last_block_end_;
   size_t last_bytecode_start_;
   bool exit_seen_in_block_;
+  int unbound_jumps_;
 
   IdentityMap<size_t> constants_map_;
   ZoneVector<Handle<Object>> constants_;
 
   int parameter_count_;
   int local_register_count_;
   int context_register_count_;
   int temporary_register_count_;
 
   ZoneSet<int> free_temporaries_;
@@ skipping 72 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterScope);
 };
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_