dart2js: Initial implementation of inlining.

pkg/compiler/lib/src/cps_ir/shrinking_reductions.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.
 
 library dart2js.cps_ir.shrinking_reductions;
 
 import 'cps_ir_nodes.dart';
 import 'optimizers.dart';
 
 /**
@@ skipping 148 matching lines @@
       return;
     }
 
     // Remove the continuation.
     Continuation cont = task.node;
     _removeContinuation(cont);
 
     InvokeContinuation invoke = cont.body;
     Continuation wrappedCont = invoke.continuation.definition;
 
+    // If the invocation of wrappedCont is escaping, then all invocations of
+    // cont will be as well, after the reduction.
+    if (invoke.isEscapingTry) {
+      Reference current = cont.firstRef;
+      while (current != null) {
+        InvokeContinuation owner = current.parent;
+        owner.isEscapingTry = true;
+        current = current.next;
+      }
+    }
+
     // Replace all occurrences with the wrapped continuation.
     cont.replaceUsesWith(wrappedCont);
 
     // Perform bookkeeping on removed body and scan for new redexes.
     new _RemovalVisitor(_worklist).visit(cont);
   }
 
   void _reduceDeadParameter(_ReductionTask task) {
     // Continuation eta-reduction can destroy a dead parameter redex.  For
     // example, in the term:
@@ skipping 334 matching lines @@
 
   String toString() => "$kind: $node";
 }
 
 /// A dummy class used solely to mark nodes as deleted once they are removed
 /// from a term.
 class _DeletedNode extends Node {
   accept(_) {}
   setParentPointers() {}
 }