From mboxrd@z Thu Jan  1 00:00:00 1970
From: amylaar@cygnus.co.uk
To: law@unknown.cygnus.co.uk (Jeffrey A Law)
Cc: raulir@voimax.voima.jkl.fi, egcs@cygnus.com
Subject: Re: Stack variables
Date: Thu, 22 Jan 1998 01:45:00 -0000
Message-id: <199801211826.SAA14686@phal.cygnus.co.uk>
References: <760.885309234@unknown>
X-SW-Source: 1998-01/msg00771.html

> It's an interesting thought, but separating the stack variables from
> other uses of the stack might be rather difficult.  There's also significant
> code in the compiler which knows special things about the stack or frame
> poiner (look for stack_pointer_rtx in reload*.c and many other files).

Well, what we could do without rewriting significant parts of the compiler
would be to add two extra stack pages in the prologue, and unmap a properly
aligned page in that area.  The epilogue would then have to clean this up.
This should be possible even in a machine description, so no backend
patches would be needed.