[Interpreter] Preparation for wide registers.

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 "src/ast/ast.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/interpreter/constant-array-builder.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 class Isolate;
 
 namespace interpreter {
 
 class BytecodeLabel;
-class ConstantArrayBuilder;
 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 final {
  public:
   BytecodeArrayBuilder(Isolate* isolate, Zone* zone);
   ~BytecodeArrayBuilder();
@@ skipping 59 matching lines @@
 
   // Stores the object in the accumulator into |slot_index| of |context|.
   BytecodeArrayBuilder& StoreContextSlot(Register context, int slot_index);
 
   // Register-accumulator transfers.
   BytecodeArrayBuilder& LoadAccumulatorWithRegister(Register reg);
   BytecodeArrayBuilder& StoreAccumulatorInRegister(Register reg);
 
   // Register-register transfer.
   BytecodeArrayBuilder& MoveRegister(Register from, Register to);
-  BytecodeArrayBuilder& ExchangeRegisters(Register reg0, Register reg1);
 
   // Named load property.
   BytecodeArrayBuilder& LoadNamedProperty(Register object,
                                           const Handle<String> name,
                                           int feedback_slot,
                                           LanguageMode language_mode);
   // Keyed load property. The key should be in the accumulator.
   BytecodeArrayBuilder& LoadKeyedProperty(Register object, int feedback_slot,
                                           LanguageMode language_mode);
 
@@ skipping 112 matching lines @@
   BytecodeArrayBuilder& ForInPrepare(Register cache_info_triple);
   BytecodeArrayBuilder& ForInDone(Register index, Register cache_length);
   BytecodeArrayBuilder& ForInNext(Register receiver, Register index,
                                   Register cache_type_array_pair);
   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_; }
-  ConstantArrayBuilder* constant_array_builder() {
-    return &constant_array_builder_;
-  }
-  const ConstantArrayBuilder* constant_array_builder() const {
-    return &constant_array_builder_;
-  }
+  class PreviousBytecodeHelper;
+  friend class BytecodeRegisterAllocator;
 
   static Bytecode BytecodeForBinaryOperation(Token::Value op);
   static Bytecode BytecodeForCountOperation(Token::Value op);
   static Bytecode BytecodeForCompareOperation(Token::Value op);
   static Bytecode BytecodeForWideOperands(Bytecode bytecode);
   static Bytecode BytecodeForLoadIC(LanguageMode language_mode);
   static Bytecode BytecodeForKeyedLoadIC(LanguageMode language_mode);
   static Bytecode BytecodeForStoreIC(LanguageMode language_mode);
   static Bytecode BytecodeForKeyedStoreIC(LanguageMode language_mode);
   static Bytecode BytecodeForLoadGlobal(LanguageMode language_mode,
@@ skipping 36 matching lines @@
       const ZoneVector<uint8_t>::iterator& jump_location, int delta);
   void PatchIndirectJumpWith16BitOperand(
       const ZoneVector<uint8_t>::iterator& jump_location, int delta);
 
   void LeaveBasicBlock();
   void EnsureReturn();
 
   bool OperandIsValid(Bytecode bytecode, int operand_index,
                       uint32_t operand_value) const;
   bool LastBytecodeInSameBlock() const;
+  bool RegisterIsValid(Register reg, OperandType reg_type) const;
 
   bool NeedToBooleanCast();
   bool IsRegisterInAccumulator(Register reg);
 
-  bool RegisterIsValid(Register reg) const;
-
   // Temporary register management.
   int BorrowTemporaryRegister();
   int BorrowTemporaryRegisterNotInRange(int start_index, int end_index);
   void ReturnTemporaryRegister(int reg_index);
   int PrepareForConsecutiveTemporaryRegisters(size_t count);
   void BorrowConsecutiveTemporaryRegister(int reg_index);
   bool TemporaryRegisterIsLive(Register reg) const;
 
   Register first_temporary_register() const;
   Register last_temporary_register() const;
 
   // Gets a constant pool entry for the |object|.
   size_t GetConstantPoolEntry(Handle<Object> object);
 
+  ZoneVector<uint8_t>* bytecodes() { return &bytecodes_; }
+  const ZoneVector<uint8_t>* bytecodes() const { return &bytecodes_; }
+  Isolate* isolate() const { return isolate_; }
+  ConstantArrayBuilder* constant_array_builder() {
+    return &constant_array_builder_;
+  }
+  const ConstantArrayBuilder* constant_array_builder() const {
+    return &constant_array_builder_;
+  }
+
   Isolate* isolate_;
   Zone* zone_;
   ZoneVector<uint8_t> bytecodes_;
   bool bytecode_generated_;
   ConstantArrayBuilder constant_array_builder_;
   size_t last_block_end_;
   size_t last_bytecode_start_;
   bool exit_seen_in_block_;
   int unbound_jumps_;
 
   int parameter_count_;
   int local_register_count_;
   int context_register_count_;
   int temporary_register_count_;
   ZoneSet<int> free_temporaries_;
 
-  class PreviousBytecodeHelper;
-  friend class BytecodeRegisterAllocator;
-
   DISALLOW_COPY_AND_ASSIGN(BytecodeArrayBuilder);
 };
 
 
 // A label representing a branch target in a bytecode array. When a
 // label is bound, it represents a known position in the bytecode
 // array. For labels that are forward references there can be at most
 // one reference whilst it is unbound.
 class BytecodeLabel final {
  public:
@@ skipping 29 matching lines @@
   size_t offset_;
 
   friend class BytecodeArrayBuilder;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_