[Interpreter] Remove InterpreterExitTrampoline and replace with returning to the entry trampoline.

src/interpreter/bytecodes.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_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <iosfwd>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
@@ skipping 221 matching lines @@
   V(ForInNext, AccumulatorUse::kWrite, OperandType::kReg, OperandType::kReg,  \
     OperandType::kRegPair, OperandType::kIdx)                                 \
   V(ForInStep, AccumulatorUse::kWrite, OperandType::kReg)                     \
                                                                               \
   /* Perform a stack guard check */                                           \
   V(StackCheck, AccumulatorUse::kNone)                                        \
                                                                               \
   /* Non-local flow control */                                                \
   V(Throw, AccumulatorUse::kRead)                                             \
   V(ReThrow, AccumulatorUse::kRead)                                           \
-  V(Return, AccumulatorUse::kNone)                                            \
+  V(Return, AccumulatorUse::kRead)                                            \
                                                                               \
   /* Generators */                                                            \
   V(SuspendGenerator, AccumulatorUse::kRead, OperandType::kReg)               \
   V(ResumeGenerator, AccumulatorUse::kWrite, OperandType::kReg)               \
                                                                               \
   /* Debugger */                                                              \
   V(Debugger, AccumulatorUse::kNone)                                          \
   DEBUG_BREAK_BYTECODE_LIST(V)                                                \
                                                                               \
   /* Illegal bytecode (terminates execution) */                               \
@@ skipping 249 matching lines @@
   // Returns a debug break bytecode to replace |bytecode|.
   static Bytecode GetDebugBreak(Bytecode bytecode);
 
   // Returns the size of the bytecode including its operands for the
   // given |operand_scale|.
   static int Size(Bytecode bytecode, OperandScale operand_scale);
 
   // Returns the size of |operand|.
   static OperandSize SizeOfOperand(OperandType operand, OperandScale scale);
 
+  // Returns the number of values which |bytecode| returns.
+  static size_t ReturnCount(Bytecode bytecode);
+
   // Returns true if the bytecode is a conditional jump taking
   // an immediate byte operand (OperandType::kImm).
   static bool IsConditionalJumpImmediate(Bytecode bytecode);
 
   // Returns true if the bytecode is a conditional jump taking
   // a constant pool entry (OperandType::kIdx).
   static bool IsConditionalJumpConstant(Bytecode bytecode);
 
   // Returns true if the bytecode is a conditional jump taking
   // any kind of operand.
@@ skipping 119 matching lines @@
 std::ostream& operator<<(std::ostream& os, const AccumulatorUse& use);
 std::ostream& operator<<(std::ostream& os, const OperandScale& operand_scale);
 std::ostream& operator<<(std::ostream& os, const OperandSize& operand_size);
 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_