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Article #795Re: Better code generated with -fno-function-cse despite documentation
From: Piet van Oostrum
Date: Wed, 15 Nov 1989 11:47
Date: Wed, 15 Nov 1989 11:47
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1391 bytes
In article <8911102301.AA03955@deng>, eb@LUCID (Eric Benson) writes: ` `However, I have found at least one example of a function that actually `runs faster with -fno-function-cse that without. This is the famous ` `It looks like it might be preferable for -fno-function-cse to be the `default, at least in the case when a PC-relative call can be used. ` This is also true on the Harris HCX computers (tahoe clones). On this machine a call with a PC-rel address is about 4 times as fast as one with an indirect register. -- Piet* van Oostrum, Dept of Computer Science, University of Utrecht Padualaan 14, P.O. Box 80.089, 3508 TB Utrecht, The Netherlands. Telephone: +31-30-531806 Uucp: uunet!mcsun!hp4nl!ruuinf!piet Telefax: +31-30-513791 Internet: piet@cs.ruu.nl (*`Pete')
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!shelby!apple!usc!samsung!uunet!mcsun!hp4nl!ruuinf!piet From: piet@cs.ruu.nl (Piet van Oostrum) Newsgroups: gnu.gcc.bug Subject: Re: Better code generated with -fno-function-cse despite documentation Message-ID: <1801@ruuinf.cs.ruu.nl> Date: 15 Nov 89 11:47:06 GMT References: <8911102301.AA03955@deng> Sender: news@ruuinf.cs.ruu.nl Reply-To: piet@cs.ruu.nl (Piet van Oostrum) Distribution: gnu Organization: Dept of Computer Science, University of Utrecht, Holland Lines: 16 In-reply-to: eb@LUCID.COM (Eric Benson)