From: Ulrich Weigand <weigand@i1.informatik.uni-erlangen.de>
To: kenner@vlsi1.ultra.nyu.edu (Richard Kenner)
Cc: weigand@i1.informatik.uni-erlangen.de, gcc@gcc.gnu.org
Subject: Re: Regression due to tree loop opt / expand weirdness
Date: Wed, 06 Oct 2004 17:20:00 -0000 [thread overview]
Message-ID: <200410061657.SAA14194@faui1m.informatik.uni-erlangen.de> (raw)
In-Reply-To: <10410061645.AA13509@vlsi1.ultra.nyu.edu> from "Richard Kenner" at Oct 06, 2004 12:45:04 PM
Richard Kenner wrote:
>
> First of all, the above change is provably a no-op on ia64 since
> the valid_pointer_mode implementation on ia64 is the default one,
> which is exactly (mode != Pmode && mode != ptr_mode).
>
> Please read what I wrote. On some ia64 systems (e.g., VMS), Pmode and
> ptr_mode are both DImode but you need to support 32-bit pointers. On
> those ia64 systems, target.valid_pointer_mode is overridden to allow both
> SImode and DImode.
I could not find any such ia64 system in current GCC CVS, are you talking
about an out-of-tree port?
In any case, as I said, s390x/TPF is in exactly this situation (Pmode ==
ptr_mode == DImode, valid_pointer_mode overridden to allow both SImode
and DImode); and this case is exactly the one that my patch fixes.
Bye,
Ulrich
--
Dr. Ulrich Weigand
weigand@informatik.uni-erlangen.de
next prev parent reply other threads:[~2004-10-06 16:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-06 17:13 Richard Kenner
2004-10-06 17:20 ` Ulrich Weigand [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-10-06 20:06 Richard Kenner
2004-10-06 20:17 ` Ulrich Weigand
2004-10-06 18:18 Richard Kenner
2004-10-06 19:59 ` Ulrich Weigand
2004-10-06 13:12 Richard Kenner
2004-10-06 14:46 ` Ulrich Weigand
2004-10-06 12:56 Richard Kenner
2004-10-06 14:21 ` Ulrich Weigand
2004-10-03 22:21 Ulrich Weigand
2004-10-03 22:31 ` Richard Henderson
2004-10-03 22:38 ` Ulrich Weigand
2004-10-03 22:55 ` Richard Henderson
2004-10-03 23:15 ` Ulrich Weigand
2004-10-04 4:00 ` Richard Henderson
2004-10-04 7:28 ` Ulrich Weigand
2004-10-04 9:21 ` Eric Christopher
2004-10-04 13:17 ` Zdenek Dvorak
2004-10-04 13:24 ` Paolo Bonzini
2004-10-04 14:08 ` Zdenek Dvorak
2004-10-04 14:42 ` Paolo Bonzini
2004-10-04 14:46 ` Zdenek Dvorak
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