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Re: Projects for beginners

To: Michael Meissner <meissner at cygnus dot com>
Subject: Re: Projects for beginners
From: Richard Henderson <rth at redhat dot com>
Date: Wed, 31 Jan 2001 18:30:08 -0800
Cc: Daniel Berlin <dberlin at redhat dot com>, Zack Weinberg <zackw at Stanford dot EDU>, gcc at gcc dot gnu dot org
References: <20010131132404.A525@wolery.stanford.edu> <Pine.LNX.4.31.0101311817220.9875-100000@www.cgsoftware.com> <20010131201522.W16077@cse.cygnus.com>

On Wed, Jan 31, 2001 at 08:15:22PM -0500, Michael Meissner wrote:
> What it doesn't handle is a parallel that has two sets,
> which on the x86 is for setting the condition code register.

Those don't get created until combine.

No, the real problem is that gcse doesn't handle hard registers,
so the clobber of hard register 17 (flags) squelches everything.

r~

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