Generative constructors in the new dart backend.

pkg/compiler/lib/src/cps_ir/constant_propagation.dart

Index: pkg/compiler/lib/src/cps_ir/constant_propagation.dart
diff --git a/pkg/compiler/lib/src/cps_ir/constant_propagation.dart b/pkg/compiler/lib/src/cps_ir/constant_propagation.dart
index c9adf089d055cb93124b59faaef4fa3db00dd64e..1bab9ddb2c575101df64fc502ee9ebe360b2924c 100644
--- a/pkg/compiler/lib/src/cps_ir/constant_propagation.dart
+++ b/pkg/compiler/lib/src/cps_ir/constant_propagation.dart
@@ -2,7 +2,7 @@
 // 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 dart2js.optimizers;
+part of dart2js.cps_ir.optimizers;
 
 /**
  * Propagates constants throughout the IR, and replaces branches with fixed
@@ -12,7 +12,7 @@ part of dart2js.optimizers;
  * Implemented according to 'Constant Propagation with Conditional Branches'
  * by Wegman, Zadeck.
  */
-class ConstantPropagator extends Pass {
+class ConstantPropagator extends PassMixin {
 
   // Required for type determination in analysis of TypeOperator expressions.
   final dart2js.Compiler _compiler;
@@ -23,7 +23,8 @@ class ConstantPropagator extends Pass {
 
   ConstantPropagator(this._compiler, this._constantSystem);
 
-  void _rewriteExecutableDefinition(ExecutableDefinition root) {
+  @override
+  void rewriteExecutableDefinition(ExecutableDefinition root) {
     // Set all parent pointers.
     new ParentVisitor().visit(root);
 
@@ -43,16 +44,6 @@ class ConstantPropagator extends Pass {
     transformer.transform(root);
   }
 
-  void rewriteFunctionDefinition(FunctionDefinition root) {
-    if (root.isAbstract) return;
-    _rewriteExecutableDefinition(root);
-  }
-
-  void rewriteFieldDefinition(FieldDefinition root) {
-    if (!root.hasInitializer) return;
-    _rewriteExecutableDefinition(root);
-  }
-
 }
 
 /**
@@ -307,6 +298,10 @@ class _ConstPropagationVisitor extends Visitor {
         "_ConstPropagationVisitor is stale, add missing visit overrides");
   }
 
+  void visitRunnableBody(RunnableBody node) {
+    setReachable(node.body);
+  }
+
   void visitFunctionDefinition(FunctionDefinition node) {
     node.parameters.forEach(visit);
     setReachable(node.body);