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Re: [PATCH] Constant fold -A - B as -B - A (take 3)

From: Richard Henderson <rth at redhat dot com>
To: Roger Sayle <roger at www dot eyesopen dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Tue, 18 Feb 2003 10:00:25 -0800
Subject: Re: [PATCH] Constant fold -A - B as -B - A (take 3)
References: <20030207225251.GG29878@redhat.com> <Pine.LNX.4.44.0302180659010.25002-100000@www.eyesopen.com>

On Tue, Feb 18, 2003 at 07:05:39AM -0700, Roger Sayle wrote:
> 	* fold-const.c (negate_expr_p): New function to determine whether
> 	an expression can be negated cheaply.
> 	(fold) [MINUS_EXPR]: Use it to determine whether to transform
> 	-A - B into -B - A for floating point types.

Ok.


r~

References:
- Re: [PATCH] Constant fold -A - B as -B - A (take 2)
  - From: Richard Henderson
- [PATCH] Constant fold -A - B as -B - A (take 3)
  - From: Roger Sayle

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