Introduce bytecodes for assisting generator suspend and resume.

src/compiler/bytecode-graph-builder.cc

 // 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.
 
 #include "src/compiler/bytecode-graph-builder.h"
 
 #include "src/compiler/bytecode-branch-analysis.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecodes.h"
@@ skipping 1344 matching lines @@
 void BytecodeGraphBuilder::VisitForInNext() { BuildForInNext(); }
 
 void BytecodeGraphBuilder::VisitForInStep() {
   FrameStateBeforeAndAfter states(this);
   Node* index =
       environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0));
   index = NewNode(javascript()->ForInStep(), index);
   environment()->BindAccumulator(index, &states);
 }
 
+void BytecodeGraphBuilder::VisitSuspendGenerator() {
+  UNIMPLEMENTED();
+}
+
+void BytecodeGraphBuilder::VisitResumeGenerator() {
+  UNIMPLEMENTED();
+}
+
 void BytecodeGraphBuilder::VisitWide() {
   // Consumed by the BytecodeArrayIterator.
   UNREACHABLE();
 }
 
 void BytecodeGraphBuilder::VisitExtraWide() {
   // Consumed by the BytecodeArrayIterator.
   UNREACHABLE();
 }
 
@@ skipping 267 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8