[turbofan] Fix bug in Rangify.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 3649f7d79dcd4c1bf7f0699c92b9c9d512364fed..dc85405fa2fad215275c72cb8fe4e4b41568b768 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -408,7 +408,9 @@ Type* Typer::Visitor::FalsifyUndefined(Type* type, Typer* t) {
 
 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());