Introduce bytecodes for assisting generator suspend and resume.

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index 2249cbcb3f52d9e1be32458f305ab5d89b92ffdd..89175e24a0782052b67d09c0bda638ac3fda23fe 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -1362,6 +1362,14 @@ void BytecodeGraphBuilder::VisitForInStep() {
   environment()->BindAccumulator(index, &states);
 }
 
+void BytecodeGraphBuilder::VisitSuspendGenerator() {
+  UNIMPLEMENTED();
+}
+
+void BytecodeGraphBuilder::VisitResumeGenerator() {
+  UNIMPLEMENTED();
+}
+
 void BytecodeGraphBuilder::VisitWide() {
   // Consumed by the BytecodeArrayIterator.
   UNREACHABLE();