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Re: [PATCH] RHS INDIRECT_REF optimizations (PR tree-optimization/26069)

From: "Andrew Pinski" <pinskia at gmail dot com>
To: "Richard Guenther" <richard dot guenther at gmail dot com>
Cc: "Jakub Jelinek" <jakub at redhat dot com>, gcc-patches at gcc dot gnu dot org
Date: Sat, 12 Jan 2008 04:55:19 -0800
Subject: Re: [PATCH] RHS INDIRECT_REF optimizations (PR tree-optimization/26069)
References: <20080111193338.GU15450@devserv.devel.redhat.com> <84fc9c000801120340u4133742akd636f2a46e9cc43d@mail.gmail.com>

On Jan 12, 2008 3:40 AM, Richard Guenther <richard.guenther@gmail.com> wrote:
> Technically I think we should use common machinery via
> folding VIEW_CONVERT_EXPRs for this kind of type-punning and
> not sticking the simplification in indirect-ref folding (that is, in
> indirect-ref folding build_fold a VIEW_CONVERT_EXPR).

To do this, you would then need to extend DECL_GIMPLE_REG_P to all
types and maybe have a pass which also converts some non
DECL_GIMPLE_REG_P to be true if it is valid for them.

This is what I found out the last time I tried this and I never got a
patch which extended DECL_GIMPLE_REG_P as it would cause too many
regressions.

Thanks,
Andrew Pinski

Follow-Ups:
- Re: [PATCH] RHS INDIRECT_REF optimizations (PR tree-optimization/26069)
  - From: Richard Guenther

References:
- [PATCH] RHS INDIRECT_REF optimizations (PR tree-optimization/26069)
  - From: Jakub Jelinek
- Re: [PATCH] RHS INDIRECT_REF optimizations (PR tree-optimization/26069)
  - From: Richard Guenther

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