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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/102989] Implement C2x's n2763 (_BitInt)
Date: Wed, 24 May 2023 12:46:25 +0000 [thread overview]
Message-ID: <bug-102989-4-N6bcSyw2d2@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-102989-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102989
--- Comment #44 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 24 May 2023, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102989
>
> Jakub Jelinek <jakub at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Attachment #55141|0 |1
> is obsolete| |
>
> --- Comment #43 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Created attachment 55148
> --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55148&action=edit
> gcc14-bitint-wip.patch
>
> Another update. This version can emit _BitInt(N) values in non-automatic
> variable initializers, handles passing/returning _BitInt(N) and for N <= 64
> (i.e. what fits into a single limb) from what I can see handling it in GIMPLE
> passes and and even expansion/RTL seems to work.
> Now, as discussed earlier, for N > GET_MODE_PRECISION (limb_mode) I think we
> want to lower it in some pass in between IPA and vectorization. For N which
> fits into DImode if limb is 32-bit (currently no target does that as we have
> just x86-64 support) or which fits into TImode for 64-bit if TImode is
> supported, I guess we want to map arithmetics
> to TImode arithmetics, for say 2-4x larger emit code for arithmetics (except
> perhaps multiplication/division) inline as straight line code and for even
> larger as loops.
> In the last case, a question is if we could use e.g. TARGET_MEM_REF for the
> variable offset in those loops on the vars even when they aren't
> TREE_ADDRESSABLE (but would force them into memory during expansion).
Note you should use TARGET_MEM_REF only when it describes the actual
addressing mode you want to use. Otherwise just synthesize ARRAY_REFs
like ARRAY_REF <VIEW_CONVERT_EXPR (limb[]) <limbs>, index> with
an appropriate VLA libm[] array type.
I'd do the lowering right before pass_complete_unrolli and generally
emit loopy form (another pass placement required in the -Og pipeline).
next prev parent reply other threads:[~2023-05-24 12:46 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-28 17:41 [Bug c/102989] New: Add Clang's _ExtInt(N) colomar.6.4.3 at gmail dot com
2021-10-28 17:54 ` [Bug c/102989] " colomar.6.4.3 at gmail dot com
2021-10-28 17:57 ` colomar.6.4.3 at gmail dot com
2021-10-28 17:57 ` colomar.6.4.3 at gmail dot com
2021-10-28 18:01 ` jakub at gcc dot gnu.org
2021-10-28 18:11 ` colomar.6.4.3 at gmail dot com
2021-10-28 21:41 ` joseph at codesourcery dot com
2021-10-28 21:47 ` [Bug c/102989] Implement C2x's n2763 (_BitInt) pinskia at gcc dot gnu.org
2021-10-28 21:49 ` pinskia at gcc dot gnu.org
2021-11-11 19:42 ` pinskia at gcc dot gnu.org
2021-11-11 19:58 ` colomar.6.4.3 at gmail dot com
2021-11-11 21:27 ` joseph at codesourcery dot com
2022-10-25 12:14 ` jakub at gcc dot gnu.org
2022-10-25 15:25 ` hjl.tools at gmail dot com
2022-10-25 20:32 ` joseph at codesourcery dot com
2022-10-25 20:42 ` hjl.tools at gmail dot com
2022-10-25 20:45 ` jakub at gcc dot gnu.org
2022-10-25 21:05 ` segher at gcc dot gnu.org
2022-10-25 21:05 ` hjl.tools at gmail dot com
2022-10-25 21:09 ` pinskia at gcc dot gnu.org
2022-10-25 21:10 ` jakub at gcc dot gnu.org
2022-10-25 21:30 ` segher at gcc dot gnu.org
2022-10-25 21:50 ` segher at gcc dot gnu.org
2022-10-26 6:29 ` uweigand at gcc dot gnu.org
2022-10-26 6:50 ` jakub at gcc dot gnu.org
2022-10-26 8:35 ` redi at gcc dot gnu.org
2022-10-26 17:29 ` joseph at codesourcery dot com
2022-10-28 9:47 ` rguenth at gcc dot gnu.org
2022-10-28 10:32 ` jakub at gcc dot gnu.org
2022-10-28 10:51 ` rguenther at suse dot de
2022-10-28 11:02 ` colomar.6.4.3 at gmail dot com
2022-10-28 17:27 ` pinskia at gcc dot gnu.org
2022-10-28 20:31 ` joseph at codesourcery dot com
2022-10-28 20:39 ` joseph at codesourcery dot com
2023-04-09 19:59 ` leni536 at gmail dot com
2023-04-12 22:17 ` george at bott dot gg
2023-05-11 18:00 ` jakub at gcc dot gnu.org
2023-05-11 18:21 ` jakub at gcc dot gnu.org
2023-05-11 22:10 ` joseph at codesourcery dot com
2023-05-12 7:46 ` jakub at gcc dot gnu.org
2023-05-12 8:41 ` rguenth at gcc dot gnu.org
2023-05-16 16:20 ` jakub at gcc dot gnu.org
2023-05-17 7:22 ` rguenth at gcc dot gnu.org
2023-05-23 12:04 ` jakub at gcc dot gnu.org
2023-05-24 11:48 ` jakub at gcc dot gnu.org
2023-05-24 12:46 ` rguenther at suse dot de [this message]
2023-05-24 13:16 ` jakub at gcc dot gnu.org
2023-05-24 13:29 ` rguenther at suse dot de
2023-05-24 14:18 ` jakub at gcc dot gnu.org
2023-05-24 14:57 ` rguenther at suse dot de
2023-05-24 15:31 ` jakub at gcc dot gnu.org
2023-05-26 16:13 ` jakub at gcc dot gnu.org
2023-05-26 16:16 ` jakub at gcc dot gnu.org
2023-05-26 17:11 ` jakub at gcc dot gnu.org
2023-06-02 10:39 ` jakub at gcc dot gnu.org
2023-06-02 10:43 ` rguenther at suse dot de
2023-06-02 10:53 ` jakub at gcc dot gnu.org
2023-06-02 17:06 ` jakub at gcc dot gnu.org
2023-06-05 7:14 ` rguenth at gcc dot gnu.org
2023-06-05 7:34 ` jakub at gcc dot gnu.org
2023-06-05 7:43 ` rguenth at gcc dot gnu.org
2023-06-05 7:58 ` jakub at gcc dot gnu.org
2023-06-05 8:21 ` rguenther at suse dot de
2023-06-05 8:33 ` jakub at gcc dot gnu.org
2023-06-06 7:13 ` rguenth at gcc dot gnu.org
2023-06-15 11:28 ` jakub at gcc dot gnu.org
2023-06-15 18:02 ` jakub at gcc dot gnu.org
2023-06-19 17:40 ` jakub at gcc dot gnu.org
2023-06-20 20:04 ` jakub at gcc dot gnu.org
2023-06-22 19:47 ` jakub at gcc dot gnu.org
2023-06-23 17:03 ` jakub at gcc dot gnu.org
2023-06-26 18:48 ` jakub at gcc dot gnu.org
2023-06-28 17:21 ` jakub at gcc dot gnu.org
2023-06-29 17:01 ` jakub at gcc dot gnu.org
2023-06-30 19:22 ` jakub at gcc dot gnu.org
2023-07-05 17:23 ` jakub at gcc dot gnu.org
2023-07-07 14:26 ` jakub at gcc dot gnu.org
2023-07-07 17:59 ` jakub at gcc dot gnu.org
2023-07-11 11:20 ` jakub at gcc dot gnu.org
2023-07-12 16:28 ` jakub at gcc dot gnu.org
2023-07-13 18:03 ` jakub at gcc dot gnu.org
2023-07-14 11:18 ` jakub at gcc dot gnu.org
2023-07-14 11:18 ` jakub at gcc dot gnu.org
2023-07-14 17:19 ` jakub at gcc dot gnu.org
2023-07-17 10:21 ` jakub at gcc dot gnu.org
2023-07-17 18:06 ` jakub at gcc dot gnu.org
2023-07-18 11:07 ` jakub at gcc dot gnu.org
2023-07-18 15:45 ` jakub at gcc dot gnu.org
2023-07-20 15:51 ` jakub at gcc dot gnu.org
2023-07-21 17:10 ` jakub at gcc dot gnu.org
2023-07-25 14:40 ` jakub at gcc dot gnu.org
2023-07-26 13:04 ` jakub at gcc dot gnu.org
2023-07-26 17:41 ` jakub at gcc dot gnu.org
2023-07-27 15:18 ` jakub at gcc dot gnu.org
2023-08-10 7:22 ` cvs-commit at gcc dot gnu.org
2023-08-10 7:23 ` cvs-commit at gcc dot gnu.org
2023-08-10 15:30 ` cvs-commit at gcc dot gnu.org
2023-08-14 21:55 ` tmgross at umich dot edu
2023-09-06 15:57 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:57 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:57 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:57 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:57 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:57 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-06 15:58 ` cvs-commit at gcc dot gnu.org
2023-09-07 9:21 ` cvs-commit at gcc dot gnu.org
2023-10-12 14:07 ` cvs-commit at gcc dot gnu.org
2023-10-14 7:38 ` cvs-commit at gcc dot gnu.org
2023-10-14 22:38 ` gaius at gcc dot gnu.org
2023-11-01 8:17 ` gaius at gcc dot gnu.org
2023-11-01 9:06 ` cvs-commit at gcc dot gnu.org
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