[turbofan] Fix bug in Rangify.

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/js-operator.h"
 #include "src/compiler/node.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/node-properties.h"
@@ skipping 390 matching lines @@
 
 
 Type* Typer::Visitor::FalsifyUndefined(Type* type, Typer* t) {
   if (type->Is(Type::Undefined())) return t->singleton_false;
   return type;
 }
 
 
 Type* Typer::Visitor::Rangify(Type* type, Typer* t) {
   if (type->IsRange()) return type;        // Shortcut.
-  if (!type->Is(t->integer)) return type;  // Give up.
+  if (!type->Is(t->integer) && !type->Is(Type::Integral32())) {
+    return type;  // Give up.
+  }
   Factory* f = t->isolate()->factory();
   return Type::Range(f->NewNumber(type->Min()), f->NewNumber(type->Max()),
                      t->zone());
 }
 
 
 // Type conversion.
 
 
 Type* Typer::Visitor::ToPrimitive(Type* type, Typer* t) {
@@ skipping 1460 matching lines @@
         return typer_->float64_array_fun_;
       }
     }
   }
   return Type::Constant(value, zone());
 }
 
 }
 }
 }  // namespace v8::internal::compiler