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Re: [PATCH] Improve PR28796 (inconsistend __builtin_nan() and __builtin_unordered()) further

From: "Richard Guenther" <richard dot guenther at gmail dot com>
To: "Roger Sayle" <roger at eyesopen dot com>
Cc: "Richard Guenther" <rguenther at suse dot de>, gcc-patches at gcc dot gnu dot org
Date: Sat, 21 Oct 2006 12:13:30 +0200
Subject: Re: [PATCH] Improve PR28796 (inconsistend __builtin_nan() and __builtin_unordered()) further
References: <Pine.LNX.4.64.0608241538120.4573@nyjnma.fhfr.qr> <Pine.LNX.4.44.0608240901140.11424-100000@www.eyesopen.com>

On 8/24/06, Roger Sayle <roger@eyesopen.com> wrote:


On Thu, 24 Aug 2006, Richard Guenther wrote:
> 2006-08-25  Richard Guenther  <rguenther@suse.de>
>
>       PR middle-end/28796
>       * simplify-rtx.c (simplify_const_relational_operation):
>       Do not constant-fold ORDERED and UNORDERED for
>       flag_unsafe_math_optimizations but only we do not need to
>       honor NaNs for the given mode.

This is OK for 4.3.  If you can find an old version of GCC, that
didn't attempt to optimize C99's isunordered as a builtin, then this
patch is also OK for mainline.

Committed to mainline.

Richard.

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