Fix regression on constant folding an interceptor into a dynamic invocation.

lib/compiler/implementation/ssa/nodes.dart

 // Copyright (c) 2011, 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.
 
 interface HVisitor<R> {
   R visitAdd(HAdd node);
   R visitBitAnd(HBitAnd node);
   R visitBitNot(HBitNot node);
   R visitBitOr(HBitOr node);
   R visitBitXor(HBitXor node);
@@ skipping 1128 matching lines @@
 
 class HInvokeSuper extends HInvokeStatic {
   HInvokeSuper(selector, inputs) : super(selector, inputs);
   toString() => 'invoke super: ${element.name}';
   accept(HVisitor visitor) => visitor.visitInvokeSuper(this);
 }
 
 class HInvokeInterceptor extends HInvokeStatic {
   final SourceString name;
   final bool getter;
+  final bool setter;
 
   HInvokeInterceptor(Selector selector,
                      SourceString this.name,
                      bool this.getter,

[floitsch, 2012/05/07 13:58:32]

Since named arguments don't cost anything on constructors I would prefer that.
Alternatively I'm ok with:
bool isGetter = true;
bool isSetter = false;
new HInvokeInterceptor(..., isGetter, isSetter, ...)
at the call-site.

[ngeoffray, 2012/05/08 07:43:46]

Added named parameters.

+                     bool this.setter,
                      List<HInstruction> inputs,
                      [HType knownType = HType.UNKNOWN])
       : super(selector, inputs, knownType);
 
   toString() => 'invoke interceptor: ${element.name}';
   accept(HVisitor visitor) => visitor.visitInvokeInterceptor(this);
 
   bool isLengthGetter() {
     return getter && name == const SourceString('length');
   }
@@ skipping 1242 matching lines @@
                        this.finallyBlock,
                        this.joinBlock);
 
   HBasicBlock get start() => body.start;
   HBasicBlock get end() =>
       finallyBlock === null ? catchBlock.end : finallyBlock.end;
 
   bool accept(HStatementInformationVisitor visitor) =>
     visitor.visitTryInfo(this);
 }