Introduce simplified BooleanToNumber operator.

src/compiler/typer.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/simplified-operator.h"
@@ skipping 626 matching lines @@
 }
 
 
 // Simplified operators.
 
 Bounds Typer::Visitor::TypeBooleanNot(Node* node) {
   return Bounds(Type::Boolean(zone()));
 }
 
 
+Bounds Typer::Visitor::TypeBooleanToNumber(Node* node) {
+  return Bounds(Type::Number(zone()));
+}
+
+
 Bounds Typer::Visitor::TypeNumberEqual(Node* node) {
   return Bounds(Type::Boolean(zone()));
 }
 
 
 Bounds Typer::Visitor::TypeNumberLessThan(Node* node) {
   return Bounds(Type::Boolean(zone()));
 }
 
 
@@ skipping 227 matching lines @@
 }
 
 
 void Typer::DecorateGraph(Graph* graph) {
   graph->AddDecorator(new (zone()) TyperDecorator(this));
 }
 
 }
 }
 }  // namespace v8::internal::compiler