dart2js-kernel: ir.EmptyStatement

pkg/compiler/lib/src/ssa/builder_kernel.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:kernel/ast.dart' as ir;
 import 'package:kernel/text/ast_to_text.dart' show debugNodeToString;
 
 import '../closure.dart';
 import '../common.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
@@ skipping 465 matching lines @@
       }
     }
     assert(!current.isClosed());
     if (stack.isNotEmpty) {
       compiler.reporter
           .internalError(NO_LOCATION_SPANNABLE, 'Non-empty instruction stack');
     }
   }
 
   @override
+  void visitEmptyStatement(ir.EmptyStatement statement) {
+    // Empty statement adds no instructions to current block.
+  }
+
+  @override
   void visitExpressionStatement(ir.ExpressionStatement exprStatement) {
     if (!isReachable) return;
     ir.Expression expression = exprStatement.expression;
     if (expression is ir.Throw) {
       // TODO(sra): Prevent generating a statement when inlining.
       _visitThrowExpression(expression.expression);
       closeAndGotoExit(new HThrow(pop(), null));
     } else {
       expression.accept(this);
       pop();
@@ skipping 1433 matching lines @@
     push(new HNot(popBoolified(), backend.boolType));
   }
 
   @override
   void visitStringConcatenation(ir.StringConcatenation stringConcat) {
     KernelStringBuilder stringBuilder = new KernelStringBuilder(this);
     stringConcat.accept(stringBuilder);
     stack.add(stringBuilder.result);
   }
 }