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Re: PR tree-optimization/19903

From: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
To: Eric Botcazou <ebotcazou at libertysurf dot fr>
Cc: gcc-patches at gcc dot gnu dot org
Date: Wed, 30 Mar 2005 16:20:03 +0200
Subject: Re: PR tree-optimization/19903
References: <200503301407.30045.ebotcazou@libertysurf.fr> <20050330131235.GA12888@atrey.karlin.mff.cuni.cz> <d2e8pv$v40$1@sea.gmane.org> <200503301551.52501.ebotcazou@libertysurf.fr>

Eric Botcazou wrote:

TYPE_PRECISION has not been there since day #1, IIRC, and anyway it has not been stressed very much before tree-ssa.

Day #1 TYPE_PRECISION existed, of course. :-) Not very recent either:

1.1 (law 11-Aug-97): #define TYPE_PRECISION(NODE) ((NODE)->type.precision)

So I did not Remember Correctly :-) Maybe it is the usage of TYPE_PRECISION for C bitfields that is recent...

The problem with many Ada bugs is that the tree optimizers have stricter semantics than the expander, and it is not clear where it is that the semantics have changed. This thread is showing that.

Paolo

References:
- PR tree-optimization/19903
  - From: Eric Botcazou
- Re: PR tree-optimization/19903
  - From: Zdenek Dvorak
- Re: PR tree-optimization/19903
  - From: Paolo Bonzini
- Re: PR tree-optimization/19903
  - From: Eric Botcazou

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