[turbofan] Unify BooleanToNumber, StringToNumber and PlainPrimitiveToNumber.

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/typer.h"
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/common-operator.h"
@@ skipping 1539 matching lines @@
 Type* Typer::Visitor::TypeJSGeneratorRestoreRegister(Node* node) {
   return Type::Any();
 }
 
 Type* Typer::Visitor::TypeJSStackCheck(Node* node) { return Type::Any(); }
 
 // Simplified operators.
 
 Type* Typer::Visitor::TypeBooleanNot(Node* node) { return Type::Boolean(); }
 
-Type* Typer::Visitor::TypeBooleanToNumber(Node* node) {
-  return TypeUnaryOp(node, ToNumber);
-}
-
 Type* Typer::Visitor::TypeNumberEqual(Node* node) { return Type::Boolean(); }
 
 Type* Typer::Visitor::TypeNumberLessThan(Node* node) { return Type::Boolean(); }
 
 Type* Typer::Visitor::TypeNumberLessThanOrEqual(Node* node) {
   return Type::Boolean();
 }
 
 Type* Typer::Visitor::TypeSpeculativeNumberEqual(Node* node) {
   return Type::Boolean();
@@ skipping 198 matching lines @@
     Handle<String> string = f->LookupSingleCharacterStringFromCode(code);
     return Type::Constant(string, t->zone());
   }
   return Type::String();
 }
 
 Type* Typer::Visitor::TypeStringFromCharCode(Node* node) {
   return TypeUnaryOp(node, StringFromCharCodeTyper);
 }
 
-Type* Typer::Visitor::TypeStringToNumber(Node* node) {
-  return TypeUnaryOp(node, ToNumber);
-}
-
 Type* Typer::Visitor::TypeCheckBounds(Node* node) {
   // TODO(bmeurer): We could do better here based on the limit.
   return Type::Unsigned31();
 }
 
 Type* Typer::Visitor::TypeCheckNumber(Node* node) {
   Type* arg = Operand(node, 0);
   return Type::Intersect(arg, Type::Number(), zone());
 }
 
@@ skipping 774 matching lines @@
   }
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8