From: Andreas Schwab <schwab@suse.de>
To: Erik Schnetter <schnetter@uni-tuebingen.de>
Cc: gcc@gcc.gnu.org
Subject: Re: i386 and asm jumping
Date: Wed, 08 May 2002 02:43:00 -0000 [thread overview]
Message-ID: <jehelj9fuy.fsf@sykes.suse.de> (raw)
In-Reply-To: <175EFc-07596WC@fmrl02.sul.t-online.com> (Erik Schnetter's message of "Wed, 8 May 2002 01:20:08 +0200")
Erik Schnetter <schnetter@uni-tuebingen.de> writes:
|> Peter Barada wrote:
|>
|> > Jumps in asm statements will create problems since the optimizers have
|> > no knowledge that there is a possible change in flow caused by the asm
|> > statement, and hence will not have an accurate flow diagram of the
|> > function. From there its all downhill.
|>
|> That is true. However, the same could be said from asm code changing
|> registers.
Why? You can accurately describe this to the compiler.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE GmbH, Deutschherrnstr. 15-19, D-90429 Nürnberg
Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2002-05-08 8:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-07 16:33 Erik Schnetter
2002-05-08 2:43 ` Andreas Schwab [this message]
2002-05-09 9:01 ` Erik Schnetter
-- strict thread matches above, loose matches on Subject: below --
2002-05-07 7:30 Robert Dewar
2002-05-07 9:03 ` Peter Barada
2002-05-07 5:49 Robert Dewar
2002-05-07 6:48 ` Andreas Schwab
2002-05-07 10:31 ` Johan Rydberg
2002-05-07 15:23 ` Richard Henderson
2002-05-08 4:15 ` Bernd Jendrissek
2002-05-07 7:45 ` Michael Matz
2002-05-07 5:06 Johan Rydberg
2002-05-07 5:15 ` Jan Hubicka
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