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Article #51780gcc -04
From: Gary W. Flake
Date: Sun, 28 Mar 1993 07:44
Date: Sun, 28 Mar 1993 07:44
21 lines
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1319 bytes
I am using gcc version 2.2.2 on a DECstation 3100, and I discovered (quite by accident) that gcc accepts a -04 option. I never heard of this and the man pages say nothing about it. I checked the generated assembler of normal vs, -O, -O2, and -O4, and sure enough, -04 generates the most, but it only produces code about as fast as -02, (sometimes faster somtimes slower -- depends on the code.) Interestingly, for ``simple'' functions it generates the same code as -02, but with different labels. Anybody know anything about this? Regards, Gary -- Spoken: Gary W. Flake Domain: peyote@umiacs.umd.edu UUCP: uunet!mimsy!peyote Phone: +1-301-405-6757 USPS: UMIACS, U. of Maryland, College Park, MD 20742
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 11318c,9274a4552777df75,start X-Google-Attributes: gid11318c,public X-Google-ArrivalTime: 1993-03-28 15:48:40 PST Path: arc1-ca.pugleaf.net!sparky!uunet!iris.mbvlab.wpafb.af.mil!blackbird.afit.af.mil!afterlife!mimsy!peyote From: peyote@umiacs.umd.edu (Gary W. Flake) Newsgroups: gnu.gcc.help Subject: gcc -04 Summary: Is this a secret-super-ultra-optimizer option? Message-ID: <65579@mimsy.umd.edu> Date: 28 Mar 93 07:44:27 GMT Sender: news@mimsy.umd.edu Organization: UMIACS, University of Maryland, College Park, MD 20742 Lines: 21