[Interpreter] Add SetPendingMessage bytecode.

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 <cstdint>
 #include <iosfwd>
 #include <string>
@@ skipping 223 matching lines @@
     OperandType::kRegOutTriple)                                                \
   V(ForInContinue, AccumulatorUse::kWrite, OperandType::kReg,                  \
     OperandType::kReg)                                                         \
   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)                                         \
                                                                                \
+  /* Update the pending message */                                             \
+  V(SetPendingMessage, AccumulatorUse::kReadWrite)                             \
+                                                                               \
   /* Non-local flow control */                                                 \
   V(Throw, AccumulatorUse::kRead)                                              \
   V(ReThrow, AccumulatorUse::kRead)                                            \
   V(Return, AccumulatorUse::kRead)                                             \
                                                                                \
   /* Generators */                                                             \
   V(SuspendGenerator, AccumulatorUse::kRead, OperandType::kReg)                \
   V(ResumeGenerator, AccumulatorUse::kWrite, OperandType::kReg)                \
                                                                                \
   /* Debugger */                                                               \
@@ skipping 481 matching lines @@
 #undef CONSTEXPR
 
 V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
                                            const Bytecode& bytecode);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_