cps-ir: Implement boolean conversion in and use it to implement '&&', '||', and '?:'.

pkg/compiler/lib/src/cps_ir/cps_ir_tracer.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.ir_tracer;
 
 import 'dart:async' show EventSink;
 
 import 'cps_ir_nodes.dart' as cps_ir hide Function;
 import '../tracer.dart';
+import 'package:compiler/src/js_backend/codegen/unsugar.dart' as js;

[sigurdm, 2014/11/20 12:47:28]

package import

 
 /**
  * If true, show LetCont expressions in output.
  */
 const bool IR_TRACE_LET_CONT = false;
 
 class IRTracer extends TracerUtil implements cps_ir.Visitor {
   EventSink<String> output;
 
   IRTracer(this.output);
@@ skipping 224 matching lines @@
     String variable = node.variable.name;
     return 'GetClosureVariable $variable';
   }
 
 
   visitCondition(cps_ir.Condition c) {}
   visitExpression(cps_ir.Expression e) {}
   visitPrimitive(cps_ir.Primitive p) {}
   visitDefinition(cps_ir.Definition d) {}
   visitNode(cps_ir.Node n) {}
+
+  @override
+  visitBoolify(js.Boolify node) => "Boolify ${node.value}";
 }
 
 /**
  * Invents (and remembers) names for Continuations, Parameters, etc.
  * The names must match the conventions used by IR Hydra, e.g.
  * Continuations and Functions must have names of form B### since they
  * are visualized as basic blocks.
  */
 class Names {
   final Map<Object, String> names = {};
@@ skipping 118 matching lines @@
     }
   }
 
   visitContinuation(cps_ir.Continuation c) {
     var old_node = current_block;
     current_block = getBlock(c);
     visit(c.body);
     current_block = old_node;
   }
 }