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Re: PARM_DECL of DECL_SIZE 0, but TYPE_SIZE of 96 bits

From: Daniel Berlin <dberlin at dberlin dot org>
To: Giovanni Bajo <rasky at develer dot com>
Cc: gcc at gcc dot gnu dot org, Richard Henderson <rth at redhat dot com>
Date: Thu, 30 Jun 2005 15:02:51 -0400
Subject: Re: PARM_DECL of DECL_SIZE 0, but TYPE_SIZE of 96 bits
References: <1120085832.7612.81.camel@linux-009002219098> <071801c57da4$3986c7d0$bf03030a@trilan>

On Thu, 2005-06-30 at 20:47 +0200, Giovanni Bajo wrote:
> Daniel Berlin <dberlin@dberlin.org> wrote:
> 
> > So we've got a parm decl that if you ask it for the DECL_SIZE, says 0,
> > but has a TYPE_SIZE of 12 bytes, and we access fields in it, etc.
> 
> 
> I am not sure of what the exact relations between DECL_SIZE and TYPE_SIZE
> are, but probably some verification could be done, eg, at gimplification
> time, rather than waiting for latent bugs in optimizers to produce wrong
> code?

I'll add a verify pass, but i'm sure it's going to be painful :).

--Dan

References:
- PARM_DECL of DECL_SIZE 0, but TYPE_SIZE of 96 bits
  - From: Daniel Berlin
- Re: PARM_DECL of DECL_SIZE 0, but TYPE_SIZE of 96 bits
  - From: Giovanni Bajo

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