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Re: gcc 3.3 / i386 / -O2 question

From: Luca Benini <lbenini at csr dot unibo dot it>
To: Dave Korn <dk at artimi dot com>
Cc: 'Robert Dewar' <dewar at gnat dot com>,'Gerald Pfeifer' <gerald at pfeifer dot com>,'Beschorner Daniel' <Daniel dot Beschorner at facton dot com>, gcc at gcc dot gnu dot org,gcc-help at gcc dot gnu dot org
Date: Wed, 17 Nov 2004 14:51:21 +0100
Subject: Re: gcc 3.3 / i386 / -O2 question
References: <NUTMEGraZfBGagwiIqN0000080a@NUTMEG.CAM.ARTIMI.COM>

Dave Korn wrote:

  If the compiler had to produce the exact same asm at -O0 and -O2, how on earth
could one be optimised more than the other?

Sorry, but i wasn't clear: If i compile with a compiler 3.x.y (vanilla) a file i obtain a file. If i compile with a compiler 3.x.y (suse patch) a file i obtain a file. in the case that start this thread some compiler version (one vanilla and other SUSE) generate 2 distinct file as output.

Luca Benini


P.S.
Sorry 4 my english...

Luca

References:
- RE: gcc 3.3 / i386 / -O2 question
  - From: Dave Korn

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