Generative constructors in the new dart backend.

pkg/compiler/lib/src/tree_ir/optimization/logical_rewriter.dart

 // Copyright (c) 2014, 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 tree_ir.optimization;
 
 /// Rewrites logical expressions to be more compact in the Tree IR.
 ///
 /// In this class an expression is said to occur in "boolean context" if
 /// its result is immediately applied to boolean conversion.
@@ skipping 47 matching lines @@
 
   /// Statement to be executed next by natural fallthrough. Although fallthrough
   /// is not introduced in this phase, we need to reason about fallthrough when
   /// evaluating the benefit of swapping the branches of an [If].
   Statement fallthrough;
 
   void rewriteExecutableDefinition(ExecutableDefinition root) {
     root.body = visitStatement(root.body);
   }
 
+  void rewriteConstructorDefinition(ConstructorDefinition root) {
+    if (root.isAbstract) return;
+    List<Initializer> initializers = root.initializers;
+    for (int i = 0; i < initializers.length; ++i) {
+      initializers[i] = visitExpression(initializers[i]);
+    }
+    root.body = visitStatement(root.body);
+  }
+
+  Expression visitFieldInitializer(FieldInitializer node) {
+    node.body = visitStatement(node.body);
+    return node;
+  }
+
+  visitSuperInitializer(SuperInitializer node) {
+    List<Statement> arguments = node.arguments;
+    for (int i = 0; i < arguments.length; ++i) {
+      arguments[i] = visitStatement(arguments[i]);
+    }
+    return node;
+  }
+
   Statement visitLabeledStatement(LabeledStatement node) {
     Statement savedFallthrough = fallthrough;
     fallthrough = node.next;
     node.body = visitStatement(node.body);
     fallthrough = savedFallthrough;
     node.next = visitStatement(node.next);
     return node;
   }
 
   Statement visitAssign(Assign node) {
@@ skipping 361 matching lines @@
   }
 
   /// Destructively updates each entry of [l] with the result of visiting it.
   void _rewriteList(List<Expression> l) {
     for (int i = 0; i < l.length; i++) {
       l[i] = visitExpression(l[i]);
     }
   }
 }