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Re: reload: fix for gcc.c-torture/execute/990127-1.c -O0 on SH
- To: Richard Henderson <rth at cygnus dot com>
- Subject: Re: reload: fix for gcc.c-torture/execute/990127-1.c -O0 on SH
- From: Jeffrey A Law <law at cygnus dot com>
- Date: Mon, 21 Aug 2000 18:12:24 -0600
- cc: Alexandre Oliva <aoliva at redhat dot com>, gcc-patches at gcc dot gnu dot org
- Reply-To: law at cygnus dot com
In message <20000821153037.C24004@cygnus.com>you write:
> On Mon, Aug 21, 2000 at 07:57:47AM -0600, Jeffrey A Law wrote:
> > Hmmm, I thought we were not supposed to have death notes for the frame
> > pointer. That's what I'd look at first.
>
> You're thinking of the stack pointer.
>
> I suppose we could do the same thing for the frame pointer, but I'm
> not thrilled about the notion. I thought Alex's proposed patch was
> pretty nice.
How can we compute accurate death notes for the frame pointer before reload
has completed? Any reference to a pseudo would need to make the FP live since
the pseudo might not get a hard reg and would be loaded from the current
frame.
jeff