Introduce bytecodes for assisting generator suspend and resume.

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-register-allocator.h"
 #include "test/unittests/test-utils.h"
@@ skipping 271 matching lines @@
       .JumpIfTrue(&start)
       .CompareOperation(Token::Value::EQ, reg)
       .JumpIfFalse(&start);
   // Perform an operation that returns a non-boolean operation to
   // generate JumpIfToBooleanTrue/False.
   builder.BinaryOperation(Token::Value::ADD, reg)
       .JumpIfTrue(&start)
       .BinaryOperation(Token::Value::ADD, reg)
       .JumpIfFalse(&start);
 
+  // Emit generator operations
+  builder.SuspendGenerator(reg)
+      .ResumeGenerator(reg);
+
   // Intrinsics handled by the interpreter.
   builder.CallRuntime(Runtime::kInlineIsArray, reg, 1)
       .CallRuntime(Runtime::kInlineIsArray, wide, 1);
 
   builder.Debugger();
   for (size_t i = 0; i < arraysize(end); i++) {
     builder.Bind(&end[i]);
   }
   builder.Return();
 
@@ skipping 476 matching lines @@
             static_cast<size_t>(kMaxUInt16)) == OperandSize::kShort);
   CHECK(BytecodeArrayBuilder::SizeForUnsignedOperand(
             static_cast<size_t>(kMaxUInt16 + 1)) == OperandSize::kQuad);
   CHECK(BytecodeArrayBuilder::SizeForUnsignedOperand(
             static_cast<size_t>(kMaxUInt32)) == OperandSize::kQuad);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8