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Re: Incorrect bitfield aliasing with Tree SSA
- From: Adam Nemet <anemet at caviumnetworks dot com>
- To: Eric Botcazou <ebotcazou at libertysurf dot fr>
- Cc: gcc-patches at gcc dot gnu dot org, "Daniel Berlin" <dberlin at dberlin dot org>
- Date: Sat, 16 Jun 2007 22:38:55 -0700
- Subject: Re: Incorrect bitfield aliasing with Tree SSA
- References: <18034.48960.772642.116034@localhost.localdomain> <4aca3dc20706151623t2e85b196ga805e6c30519924c@mail.gmail.com> <18036.42952.55717.393712@localhost.localdomain> <200706170724.55339.ebotcazou@libertysurf.fr>
Eric Botcazou writes:
> This is *not* OK, you're unduly pessimizing things at the RTL level.
By not marking a subset relationship between the alias set of the
field and the alias set of the containing aggregate where the alias
set of the field will never be used but only the aggregate's? How
exactly would this effect anything other than maybe the performance of
the compiler?
Adam