CTZ instruction implemented as optional 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/typer.h"
 
 #include "src/base/flags.h"
 #include "src/base/lazy-instance.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/common-operator.h"
@@ skipping 1680 matching lines @@
 
 Type* Typer::Visitor::TypeWord32Ror(Node* node) { return Type::Integral32(); }
 
 
 Type* Typer::Visitor::TypeWord32Equal(Node* node) { return Type::Boolean(); }
 
 
 Type* Typer::Visitor::TypeWord32Clz(Node* node) { return Type::Integral32(); }
 
 
+Type* Typer::Visitor::TypeWord32Ctz(Node* node) { return Type::Integral32(); }
+
+
 Type* Typer::Visitor::TypeWord64And(Node* node) { return Type::Internal(); }
 
 
 Type* Typer::Visitor::TypeWord64Or(Node* node) { return Type::Internal(); }
 
 
 Type* Typer::Visitor::TypeWord64Xor(Node* node) { return Type::Internal(); }
 
 
 Type* Typer::Visitor::TypeWord64Shl(Node* node) { return Type::Internal(); }
@@ skipping 386 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