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Re: Patch gcc-4.0 should not apply mathematical associative rules for addition or multiplication

From: Geoff Keating <geoffk at geoffk dot org>
To: Roger Sayle <roger at eyesopen dot com>
Cc: Fariborz Jahanian <fjahanian at apple dot com>,Richard Henderson <rth at redhat dot com>,Dale Johannesen <dalej at apple dot com>,Ziemowit Laski <zlaski at apple dot com>,GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 7 Oct 2004 22:12:07 -0700
Subject: Re: Patch gcc-4.0 should not apply mathematical associative rules for addition or multiplication
References: <Pine.LNX.4.44.0410072109460.5469-100000@www.eyesopen.com>

On 07/10/2004, at 8:41 PM, Roger Sayle wrote:

Fixing this problem may hurt our SPECfp2000 scores :<

Only if you don't run SPECfp with -ffast-math. (The SPEC rules appear to specifically allow the use of flags like -ffast-math.)

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  - From: Roger Sayle

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