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Re: scavanging a reg

From: Richard Henderson <rth at redhat dot com>
To: Aldy Hernandez <aldyh at redhat dot com>
Cc: law at redhat dot com, David Edelsohn <dje at watson dot ibm dot com>, gcc at gcc dot gnu dot org
Date: Wed, 14 Nov 2001 10:10:00 -0800
Subject: Re: scavanging a reg
References: <28174.1005668752@porcupine.cygnus.com> <1005669721.23202.254.camel@litecycle.cc.andrews.edu>

On Tue, Nov 13, 2001 at 11:42:01AM -0500, Aldy Hernandez wrote:
>       for (i = GP_ARG_MAX + 1; i <= 32; ++i)
>         if (! fixed_regs[i] && call_used_regs[i])
>           return i;

Only do this if you need a lot of them.  And if you do need a lot
of them, you'll get better scheduling if you cycle through them.

See next_scratch_gr_reg in ia64.c if you really need this.

r~

References:
- Re: scavanging a reg
  - From: law
- Re: scavanging a reg
  - From: Aldy Hernandez

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