[Interpreter] Allocates new temporary register outside the reservation for consecutive 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 <vector>
 
 #include "src/ast/ast.h"
@@ skipping 246 matching lines @@
   void EnsureReturn();
 
   bool OperandIsValid(Bytecode bytecode, int operand_index,
                       uint32_t operand_value) const;
   bool LastBytecodeInSameBlock() const;
 
   bool NeedToBooleanCast();
   bool IsRegisterInAccumulator(Register reg);
 
   int BorrowTemporaryRegister();
+  int BorrowTemporaryRegisterNotInRange(int start_index, int end_index);
+  int AllocateAndBorrowTemporaryRegister();
   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;
 
   Isolate* isolate_;
   Zone* zone_;
@@ skipping 62 matching lines @@
 
 // A stack-allocated class than allows the instantiator to allocate
 // temporary registers that are cleaned up when scope is closed.
 // TODO(oth): Deprecate TemporaryRegisterScope use. Code should be
 // using result scopes as far as possible.
 class TemporaryRegisterScope {
  public:
   explicit TemporaryRegisterScope(BytecodeArrayBuilder* builder);
   ~TemporaryRegisterScope();
   Register NewRegister();
+  Register AllocateNewRegister();
 
   void PrepareForConsecutiveAllocations(size_t count);
   Register NextConsecutiveRegister();
 
   bool RegisterIsAllocatedInThisScope(Register reg) const;
 
+  bool hasConsecutiveAllocations() const { return next_consecutive_count_ > 0; }
+
  private:
   void* operator new(size_t size);
   void operator delete(void* p);
 
   BytecodeArrayBuilder* builder_;
   const TemporaryRegisterScope* outer_;
   ZoneVector<int> allocated_;
   int next_consecutive_register_;
   int next_consecutive_count_;
 
   DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterScope);
 };
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_