CPS implementation of throw and rethrow.

pkg/compiler/lib/src/tree_ir/optimization/statement_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;
 
 /**
  * Performs the following transformations on the tree:
  * - Assignment inlining
  * - Assignment expression propagation
@@ skipping 417 matching lines @@
     new StatementRewriter.nested(this).rewrite(node.definition);
     node.next = visitStatement(node.next);
     return node;
   }
 
   Statement visitReturn(Return node) {
     node.value = visitExpression(node.value);
     return node;
   }
 
+  Statement visitThrow(Throw node) {
+    node.value = visitExpression(node.value);
+    return node;
+  }
+
+  Statement visitRethrow(Rethrow node) {
+    return node;
+  }
+
   Statement visitBreak(Break node) {
     // Redirect through chain of breaks.
     // Note that useCount was accounted for at visitLabeledStatement.
     // Note redirect may return either a Break or Continue statement.
     Jump jump = redirect(node);
     if (jump is Break &&
         jump.target.useCount == 1 &&
         safeForInlining.contains(jump.target)) {
       --jump.target.useCount;
       return visitStatement(jump.target.binding.next);
@@ skipping 461 matching lines @@
 }
 
 /// Result of combining two expressions that do not affect reference counting.
 class GenericCombinedExpressions implements CombinedExpressions {
   Expression combined;
 
   GenericCombinedExpressions(this.combined);
 
   void uncombine() {}
 }