[Interpreter] Add SetPendingMessage bytecode.

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 8b98d4f090a16be8663cd7fb113b26812fb747ad..e45fe1281253353e73d88cdab82fda6356f0c2c3 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -1737,6 +1737,12 @@ void BytecodeGraphBuilder::VisitStackCheck() {
   environment()->RecordAfterState(node, Environment::kAttachFrameState);
 }
 
+void BytecodeGraphBuilder::VisitSetPendingMessage() {
+  Node* previous_message = NewNode(javascript()->LoadMessage());
+  NewNode(javascript()->StoreMessage(), environment()->LookupAccumulator());
+  environment()->BindAccumulator(previous_message);
+}
+
 void BytecodeGraphBuilder::VisitReturn() {
   BuildLoopExitsForFunctionExit();
   Node* pop_node = jsgraph()->ZeroConstant();