From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
To: law@cygnus.com
Cc: egcs@cygnus.com
Subject: Re: Some Haifa scheduler bugs 
Date: Wed, 03 Sep 1997 09:44:00 -0000
Message-id: <Pine.SOL.3.90.970903184242.6496A-100000@bond.informatik.rwth-aachen.de>
References: <15524.873304637@hurl.cygnus.com>
X-SW-Source: 1997-09/msg00095.html

> In general, that's not going to work.
> 
> Basically any machine that defines SMALL_REGISTER_CLASSES and passes args in
> registers is playing with fire -- reload can and will silently generate incorrect
> code for such targets.  For that reason I _highly_ recommend against using
> registers for parameter passing on the x86 targets.

How can reload generate incorrect code in this case except if the lifetime
of a hard register gets extended by the scheduler or some other optimizer?

Bernd