From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joern Rennecke <amylaar@cygnus.co.uk>
To: Greg McGary <gkm@eng.ascend.com>
Cc: gcc@gcc.gnu.org
Subject: Re: Need advice on bounds checking approaches
Date: Fri, 24 Mar 2000 12:08:00 -0000
Message-id: <200003242007.UAA14155@phal.cygnus.co.uk>
References: <200003241918.MAA08919@gkm-dsl-194.ascend.com>
X-SW-Source: 2000-03/msg00644.html

> Question: with the above plan, is there a way to provide a default
> expansion of the "check_bounds" pattern into primitive RTL
> (comparisons, conditional branches and call to abort) for those
> targets that don't define an insn for "check_bounds"?

You can use HAVE_check_bounds to test if a "check_bounds" pattern has been
defined in the md file.  If it is defined, you can use gen_check_bounds
to generate this pattern.  The expander might fail (e.g. because the
target can implement the bounds checking insn only for a particular
cpu_, in which case you get a zero return value from gen_check_bounds.