Forgot to change the condition to be true in a do/while loop that has phi updates: the condition ha…

sdk/lib/_internal/compiler/implementation/ssa/codegen.dart

 // Copyright (c) 2012, 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.
 
 part of ssa;
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
@@ skipping 966 matching lines @@
           push(generateExpression(condition));
         } else {
           generateStatements(condition);
           use(condition.conditionExpression);
         }
         js.Expression jsCondition = pop();
         if (hasPhiUpdates) {
           updateBody.statements.add(new js.Continue(null));
           body.statements.add(
               new js.If(jsCondition, updateBody, new js.Break(null)));
+          jsCondition = newLiteralBool(true);
         }
         loop = new js.Do(unwrapStatement(body), jsCondition);
         currentContainer = oldContainer;
         break;
       default:
         compiler.internalError(
           'Unexpected loop kind: ${info.kind}',
           instruction: condition.conditionExpression);
     }
     attachLocationRange(loop, info.sourcePosition, info.endSourcePosition);
@@ skipping 2106 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }