[turbofan] Add PlainPrimitiveToNumber simplified 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/bootstrapper.h"
 #include "src/compiler/graph-inl.h"
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 1444 matching lines @@
   return TypeUnaryOp(node, ToBoolean);
 }
 
 
 Bounds Typer::Visitor::TypeBooleanNot(Node* node) {
   return Bounds(Type::None(zone()), Type::Boolean(zone()));
 }
 
 
 Bounds Typer::Visitor::TypeBooleanToNumber(Node* node) {
-  return Bounds(Type::None(zone()), typer_->zero_or_one);
+  return TypeUnaryOp(node, ToNumber);
 }
 
 
 Bounds Typer::Visitor::TypeNumberEqual(Node* node) {
   return Bounds(Type::None(zone()), Type::Boolean(zone()));
 }
 
 
 Bounds Typer::Visitor::TypeNumberLessThan(Node* node) {
   return Bounds(Type::None(zone()), Type::Boolean(zone()));
@@ skipping 33 matching lines @@
 Bounds Typer::Visitor::TypeNumberToInt32(Node* node) {
   return TypeUnaryOp(node, NumberToInt32);
 }
 
 
 Bounds Typer::Visitor::TypeNumberToUint32(Node* node) {
   return TypeUnaryOp(node, NumberToUint32);
 }
 
 
+Bounds Typer::Visitor::TypePlainPrimitiveToNumber(Node* node) {
+  return TypeUnaryOp(node, ToNumber);
+}
+
+
 Bounds Typer::Visitor::TypeReferenceEqual(Node* node) {
   return Bounds(Type::None(zone()), Type::Boolean(zone()));
 }
 
 
 Bounds Typer::Visitor::TypeStringEqual(Node* node) {
   return Bounds(Type::None(zone()), Type::Boolean(zone()));
 }
 
 
@@ skipping 592 matching lines @@
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
     }
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8