From: "John David Anglin" <dave@hiauly1.hia.nrc.ca>
To: law@redhat.com
Cc: gcc@gcc.gnu.org, rth@redhat.com
Subject: Re: Is the loop pass allowed to introduce new call insns?
Date: Tue, 04 Mar 2003 00:55:00 -0000 [thread overview]
Message-ID: <200303040017.h240Hl8f017992@hiauly1.hia.nrc.ca> (raw)
In-Reply-To: <200303040001.h2401SFK016989@speedy.slc.redhat.com> from "law@redhat.com" at Mar 3, 2003 05:01:27 pm
> Q. Why did the expander create a call to __muldi3 -- shouldn't it
> have used xmpyu? Not that it would solve the underlying problem, but
> it seems odd to not use xmpyu in this case.
xmpyu was not used because the option -mdisable-fpregs was used,
disabling the pattern. The test code is from a parisc-linux
kernel build. Whether it is this is the best choice on a PA 2
machine, I'm not sure.
I think the call patterns can be modified to handle this situation
provided the call doesn't need more argument space than has been
allocated.
Dave
--
J. David Anglin dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada (613) 990-0752 (FAX: 952-6605)
next prev parent reply other threads:[~2003-03-04 0:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-03 20:51 John David Anglin
2003-03-03 22:20 ` Richard Henderson
2003-03-03 23:12 ` John David Anglin
2003-03-04 1:03 ` Richard Henderson
2003-03-04 0:20 ` law
2003-03-04 0:55 ` John David Anglin [this message]
2003-03-04 1:22 ` Richard Henderson
2003-03-04 5:29 ` John David Anglin
2003-03-04 7:40 ` Richard Henderson
2003-03-04 8:35 ` John David Anglin
2003-03-06 16:15 ` law
2003-03-09 20:17 ` [PATCH]: " John David Anglin
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