From: Ralf Baechle <ralf@linux-mips.org>
To: Long Li <long21st@yahoo.com>
Cc: linux-mips@linux-mips.org
Subject: Re: register declared variable for no optimization
Date: Fri, 31 Jan 2003 03:20:52 +0100 [thread overview]
Message-ID: <20030131032052.A7245@linux-mips.org> (raw)
In-Reply-To: <20030130231119.65802.qmail@web40412.mail.yahoo.com>; from long21st@yahoo.com on Thu, Jan 30, 2003 at 03:11:19PM -0800
On Thu, Jan 30, 2003 at 03:11:19PM -0800, Long Li wrote:
> Why the gcc-3.0.4 did the weird stuff? Do I have to
> use at least level 1 to make the register declared
> work for it?
Most modern C compilers simply ignore the register specifier because in
practice it would result in worse code and as for code quality the
result of -O0 are not of interest anyway.
Linux code must be optmized at least -O1 or it probably won't build or
work properly.
Ralf
prev parent reply other threads:[~2003-01-31 2:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-30 23:11 register declared variable for no optimization Long Li
2003-01-31 2:20 ` Ralf Baechle [this message]
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