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To: Ulrich Weigand <uweigand@de.ibm.com>
Cc: gdb-patches@sourceware.org
Subject: Re: RFA: general prologue analysis framework
References: <200510131349.j9DDnm4F002393@53v30g15.boeblingen.de.ibm.com>
From: Jim Blandy <jimb@redhat.com>
Date: Thu, 13 Oct 2005 17:17:00 -0000
In-Reply-To: <200510131349.j9DDnm4F002393@53v30g15.boeblingen.de.ibm.com> (Ulrich
 Weigand's message of "Thu, 13 Oct 2005 15:49:47 +0200 (CEST)")
Message-ID: <vt2psq99w0n.fsf@theseus.home.>
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Ulrich Weigand <uweigand@de.ibm.com> writes:
> I've removed the pv_is_array_ref code from the s390 analyzer, because
> recent GCC (optionally) no longer uses fixed-size register save areas
> in order to reduce the amount of wasted stack space.
>
> The analyser now assumes the top-most stack slot holding an incoming
> (call-saved) register value is in fact the save area for that register.
> I don't need any 'area' functions at all any more ...

It looks like your data->gpr_slot[i] array effectively serves the same
purpose as an area.  If we had generic code to scan an area and
populate a trad_frame_cache, areas might save you code.