[turbofan] Utilize type information for alias analysis.

src/field-type.cc

Index: src/field-type.cc
diff --git a/src/field-type.cc b/src/field-type.cc
index 76d694c132628f058016158130368b98cf665661..f1cb962b54f322570a41f75856c4baa25a94e9b5 100644
--- a/src/field-type.cc
+++ b/src/field-type.cc
@@ -70,7 +70,7 @@ bool FieldType::NowIs(FieldType* other) {
 bool FieldType::NowIs(Handle<FieldType> other) { return NowIs(*other); }
 
 Type* FieldType::Convert(Zone* zone) {
-  if (IsAny()) return Type::Any();
+  if (IsAny()) return Type::NonInternal();
   if (IsNone()) return Type::None();
   DCHECK(IsClass());
   return Type::Class(AsClass(), zone);