[es7] implement |do| expressions proposal

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index 7c7f23eb6d8eb5def098fd17493ab58cc358cdab..074974cf83656678870e40e4f91c59a43683415c 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -514,6 +514,11 @@ void BytecodeGenerator::VisitNativeFunctionLiteral(
 }
 
 
+void BytecodeGenerator::VisitDoExpression(DoExpression* expr) {
+  UNIMPLEMENTED();
+}
+
+
 void BytecodeGenerator::VisitConditional(Conditional* expr) { UNIMPLEMENTED(); }