[Interpreter] Add SetPendingMessage bytecode.

test/unittests/interpreter/bytecode-array-builder-unittest.cc

 // Copyright 2014 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.
 
 #include "src/v8.h"
 
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "src/interpreter/bytecode-label.h"
 #include "src/interpreter/bytecode-register-allocator.h"
@@ skipping 240 matching lines @@
   {
     BytecodeLabel after_jump1, after_jump2;
     builder.BinaryOperation(Token::Value::ADD, reg, 1)
         .JumpIfTrue(&after_jump1)
         .Bind(&after_jump1)
         .BinaryOperation(Token::Value::ADD, reg, 2)
         .JumpIfFalse(&after_jump2)
         .Bind(&after_jump2);
   }
 
+  // Emit set pending message bytecode.
+  builder.SetPendingMessage();
+
   // Emit stack check bytecode.
   builder.StackCheck(0);
 
   // Emit throw and re-throw in it's own basic block so that the rest of the
   // code isn't omitted due to being dead.
   BytecodeLabel after_throw;
   builder.Throw().Bind(&after_throw);
   BytecodeLabel after_rethrow;
   builder.ReThrow().Bind(&after_rethrow);
 
@@ skipping 454 matching lines @@
     iterator.Advance();
   }
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8