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Re: [patch] set -mabi=altivec with -ftree-vectorize

From: David Edelsohn <dje at watson dot ibm dot com>
To: Zdenek Dvorak <rakdver at kam dot mff dot cuni dot cz>, gcc-patches at gcc dot gnu dot org
Date: Tue, 31 Jul 2007 08:02:12 -0400
Subject: Re: [patch] set -mabi=altivec with -ftree-vectorize
References: <20070731071457.GB32641@kam.mff.cuni.cz> <20070731110821.GA7127@caradoc.them.org>

>>>>> Daniel Jacobowitz writes:

Daniel> Is that really a good idea?  It makes sense that -mabi= is an
Daniel> ABI-changing option, but I'd be surprised if adding -ftree-vectorize
Daniel> changed the ABI.

Daniel,

	Without automatically enabling -mabi=altivec, GCC silently
generates wrong code.

	The only other option I see is to error that -mabi=altivec needs
to be enabled with -ftree-vectorize -maltivec for the targets that do not
enable it automatically.  Generating wrong code needs more than a warning.
Do you think that is a better solution?

David

Follow-Ups:
- Re: [patch] set -mabi=altivec with -ftree-vectorize
  - From: Daniel Jacobowitz

References:
- [patch] set -mabi=altivec with -ftree-vectorize
  - From: Zdenek Dvorak
- Re: [patch] set -mabi=altivec with -ftree-vectorize
  - From: Daniel Jacobowitz

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