From: Richard Sandiford <rsandifo@redhat.com>
To: Thomas Koeller <thomas.koeller@baslerweb.com>
Cc: linux-mips@linux-mips.org
Subject: Re: [PATCH] Fix gcc-3.4.x compilation
Date: Tue, 27 Jul 2004 10:46:20 +0100 [thread overview]
Message-ID: <87fz7dvl3n.fsf@redhat.com> (raw)
In-Reply-To: <200407261237.09965.thomas.koeller@baslerweb.com> (Thomas Koeller's message of "Mon, 26 Jul 2004 12:37:09 +0200")
Thomas Koeller <thomas.koeller@baslerweb.com> writes:
> Since the meaning of 'accum' used to be 'hi' and 'lo', all its uses
> were clearly redundant.
For the record, that isn't quite true. GCC internally treated
"accum" as an entirely separate register (which is why it became
such a headache). In theory, if you have an instruction that
clobbers lo and hi, but doesn't clobber "accum", gcc might think
that a value in "accum" will still be valid.
Richard
prev parent reply other threads:[~2004-07-27 9:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-26 10:37 [PATCH] Fix gcc-3.4.x compilation Thomas Koeller
2004-07-27 9:46 ` Richard Sandiford [this message]
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