Support break in switch and break/continue in do statements

pkg/compiler/lib/src/js_model/locals.dart

Index: pkg/compiler/lib/src/js_model/locals.dart
diff --git a/pkg/compiler/lib/src/js_model/locals.dart b/pkg/compiler/lib/src/js_model/locals.dart
index a79037a6dafd542530dc1c04c95a039af44e85f7..538fe733e889cd1708e2e135c7c63ff6506734fd 100644
--- a/pkg/compiler/lib/src/js_model/locals.dart
+++ b/pkg/compiler/lib/src/js_model/locals.dart
@@ -91,7 +91,7 @@ class KernelToLocalsMapImpl implements KernelToLocalsMap {
   @override
   JumpTarget getJumpTargetForDo(ir.DoStatement node) {
     _ensureJumpMap(node);
-    return _jumpTargetMap[node.parent];
+    return _jumpTargetMap[node];
   }
 
   @override
@@ -103,8 +103,7 @@ class KernelToLocalsMapImpl implements KernelToLocalsMap {
   @override
   JumpTarget getJumpTargetForSwitch(ir.SwitchStatement node) {
     _ensureJumpMap(node);
-    throw new UnimplementedError(
-        'KernelToLocalsMapImpl.getJumpTargetForSwitch');
+    return _jumpTargetMap[node];
   }
 
   @override
@@ -161,14 +160,17 @@ class JumpVisitor extends ir.Visitor {
     // TODO(johnniwinther): Add more.

[Siggi Cherem (dart-lang), 2017/06/30 18:16:21]

anything more to add for break?

[Johnni Winther, 2017/06/30 19:16:55]

No. Removed.

     return node is ir.ForStatement ||
         node is ir.ForInStatement ||
-        node is ir.WhileStatement;
+        node is ir.WhileStatement ||
+        node is ir.DoStatement ||

[Siggi Cherem (dart-lang), 2017/06/30 18:16:21]

I thought you said there was more to this than just removing the .parent, did
something else change?

[Johnni Winther, 2017/06/30 19:16:55]

The problem was that continue in do requires a label, which we cannot currently
test.

+        node is ir.SwitchStatement;
   }
 
   bool _canBeContinueTarget(ir.TreeNode node) {
     // TODO(johnniwinther): Add more.

[Siggi Cherem (dart-lang), 2017/06/30 18:16:21]

here we are missing continue to switch-case, correct? anything else?

[Johnni Winther, 2017/06/30 19:16:55]

That's the only one.

     return node is ir.ForStatement ||
         node is ir.ForInStatement ||
-        node is ir.WhileStatement;
+        node is ir.WhileStatement ||
+        node is ir.DoStatement;
   }
 
   @override