[interpreter, debugger] implement debugger statement.

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 a86195047a98f763bd7280390745795d1bab02ef..bc41ac74101dce01a9b1f7a8a831934a5a7a50a7 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -1521,6 +1521,13 @@ void BytecodeGraphBuilder::VisitReturn() {
   MergeControlToLeaveFunction(control);
 }
 
+void BytecodeGraphBuilder::VisitDebugger() {
+  FrameStateBeforeAndAfter states(this);
+  Node* call =
+      NewNode(javascript()->CallRuntime(Runtime::kHandleDebuggerStatement));
+  environment()->BindAccumulator(call, &states);
+}
+
 void BytecodeGraphBuilder::BuildForInPrepare() {
   FrameStateBeforeAndAfter states(this);
   Node* receiver = environment()->LookupAccumulator();