[v2,PR96339] Optimise svlast[ab]

Message ID 20230612082756.27638-1-tejas.belagod@arm.com
State Accepted
Headers
Series [v2,PR96339] Optimise svlast[ab] |

Checks

Context Check Description
snail/gcc-patch-check success Github commit url

Commit Message

Tejas Belagod June 12, 2023, 8:27 a.m. UTC
  From: Tejas Belagod <tbelagod@arm.com>

  This PR optimizes an SVE intrinsics sequence where
    svlasta (svptrue_pat_b8 (SV_VL1), x)
  a scalar is selected based on a constant predicate and a variable vector.
  This sequence is optimized to return the correspoding element of a NEON
  vector. For eg.
    svlasta (svptrue_pat_b8 (SV_VL1), x)
  returns
    umov    w0, v0.b[1]
  Likewise,
    svlastb (svptrue_pat_b8 (SV_VL1), x)
  returns
     umov    w0, v0.b[0]
  This optimization only works provided the constant predicate maps to a range
  that is within the bounds of a 128-bit NEON register.

gcc/ChangeLog:

	PR target/96339
	* config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold): Fold sve
	calls that have a constant input predicate vector.
	(svlast_impl::is_lasta): Query to check if intrinsic is svlasta.
	(svlast_impl::is_lastb): Query to check if intrinsic is svlastb.
	(svlast_impl::vect_all_same): Check if all vector elements are equal.

gcc/testsuite/ChangeLog:

	PR target/96339
	* gcc.target/aarch64/sve/acle/general-c/svlast.c: New.
	* gcc.target/aarch64/sve/acle/general-c/svlast128_run.c: New.
	* gcc.target/aarch64/sve/acle/general-c/svlast256_run.c: New.
	* gcc.target/aarch64/sve/pcs/return_4.c (caller_bf16): Fix asm
	to expect optimized code for function body.
	* gcc.target/aarch64/sve/pcs/return_4_128.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_4_256.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_4_512.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_4_1024.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_4_2048.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_5.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_5_128.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_5_256.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_5_512.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_5_1024.c (caller_bf16): Likewise.
	* gcc.target/aarch64/sve/pcs/return_5_2048.c (caller_bf16): Likewise.
---
 .../aarch64/aarch64-sve-builtins-base.cc      | 133 ++++++++
 .../aarch64/sve/acle/general-c/svlast.c       |  63 ++++
 .../sve/acle/general-c/svlast128_run.c        | 313 +++++++++++++++++
 .../sve/acle/general-c/svlast256_run.c        | 314 ++++++++++++++++++
 .../gcc.target/aarch64/sve/pcs/return_4.c     |   2 -
 .../aarch64/sve/pcs/return_4_1024.c           |   2 -
 .../gcc.target/aarch64/sve/pcs/return_4_128.c |   2 -
 .../aarch64/sve/pcs/return_4_2048.c           |   2 -
 .../gcc.target/aarch64/sve/pcs/return_4_256.c |   2 -
 .../gcc.target/aarch64/sve/pcs/return_4_512.c |   2 -
 .../gcc.target/aarch64/sve/pcs/return_5.c     |   2 -
 .../aarch64/sve/pcs/return_5_1024.c           |   2 -
 .../gcc.target/aarch64/sve/pcs/return_5_128.c |   2 -
 .../aarch64/sve/pcs/return_5_2048.c           |   2 -
 .../gcc.target/aarch64/sve/pcs/return_5_256.c |   2 -
 .../gcc.target/aarch64/sve/pcs/return_5_512.c |   2 -
 16 files changed, 823 insertions(+), 24 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast.c
 create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast128_run.c
 create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast256_run.c
  

Comments

Richard Sandiford June 12, 2023, 8:45 a.m. UTC | #1
Tejas Belagod <tejas.belagod@arm.com> writes:
> From: Tejas Belagod <tbelagod@arm.com>
>
>   This PR optimizes an SVE intrinsics sequence where
>     svlasta (svptrue_pat_b8 (SV_VL1), x)
>   a scalar is selected based on a constant predicate and a variable vector.
>   This sequence is optimized to return the correspoding element of a NEON
>   vector. For eg.
>     svlasta (svptrue_pat_b8 (SV_VL1), x)
>   returns
>     umov    w0, v0.b[1]
>   Likewise,
>     svlastb (svptrue_pat_b8 (SV_VL1), x)
>   returns
>      umov    w0, v0.b[0]
>   This optimization only works provided the constant predicate maps to a range
>   that is within the bounds of a 128-bit NEON register.
>
> gcc/ChangeLog:
>
> 	PR target/96339
> 	* config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold): Fold sve
> 	calls that have a constant input predicate vector.
> 	(svlast_impl::is_lasta): Query to check if intrinsic is svlasta.
> 	(svlast_impl::is_lastb): Query to check if intrinsic is svlastb.
> 	(svlast_impl::vect_all_same): Check if all vector elements are equal.
>
> gcc/testsuite/ChangeLog:
>
> 	PR target/96339
> 	* gcc.target/aarch64/sve/acle/general-c/svlast.c: New.
> 	* gcc.target/aarch64/sve/acle/general-c/svlast128_run.c: New.
> 	* gcc.target/aarch64/sve/acle/general-c/svlast256_run.c: New.
> 	* gcc.target/aarch64/sve/pcs/return_4.c (caller_bf16): Fix asm
> 	to expect optimized code for function body.
> 	* gcc.target/aarch64/sve/pcs/return_4_128.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_4_256.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_4_512.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_4_1024.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_4_2048.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_5.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_5_128.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_5_256.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_5_512.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_5_1024.c (caller_bf16): Likewise.
> 	* gcc.target/aarch64/sve/pcs/return_5_2048.c (caller_bf16): Likewise.

OK, thanks.

Richard
  
Tejas Belagod June 13, 2023, 7:08 a.m. UTC | #2
From: Richard Sandiford <richard.sandiford@arm.com>
Date: Monday, June 12, 2023 at 2:15 PM
To: Tejas Belagod <Tejas.Belagod@arm.com>
Cc: gcc-patches@gcc.gnu.org <gcc-patches@gcc.gnu.org>, Tejas Belagod <Tejas.Belagod@arm.com>
Subject: Re: [PATCH v2] [PR96339] Optimise svlast[ab]
Tejas Belagod <tejas.belagod@arm.com> writes:
> From: Tejas Belagod <tbelagod@arm.com>
>
>   This PR optimizes an SVE intrinsics sequence where
>     svlasta (svptrue_pat_b8 (SV_VL1), x)
>   a scalar is selected based on a constant predicate and a variable vector.
>   This sequence is optimized to return the correspoding element of a NEON
>   vector. For eg.
>     svlasta (svptrue_pat_b8 (SV_VL1), x)
>   returns
>     umov    w0, v0.b[1]
>   Likewise,
>     svlastb (svptrue_pat_b8 (SV_VL1), x)
>   returns
>      umov    w0, v0.b[0]
>   This optimization only works provided the constant predicate maps to a range
>   that is within the bounds of a 128-bit NEON register.
>
> gcc/ChangeLog:
>
>        PR target/96339
>        * config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold): Fold sve
>        calls that have a constant input predicate vector.
>        (svlast_impl::is_lasta): Query to check if intrinsic is svlasta.
>        (svlast_impl::is_lastb): Query to check if intrinsic is svlastb.
>        (svlast_impl::vect_all_same): Check if all vector elements are equal.
>
> gcc/testsuite/ChangeLog:
>
>        PR target/96339
>        * gcc.target/aarch64/sve/acle/general-c/svlast.c: New.
>        * gcc.target/aarch64/sve/acle/general-c/svlast128_run.c: New.
>        * gcc.target/aarch64/sve/acle/general-c/svlast256_run.c: New.
>        * gcc.target/aarch64/sve/pcs/return_4.c (caller_bf16): Fix asm
>        to expect optimized code for function body.
>        * gcc.target/aarch64/sve/pcs/return_4_128.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_4_256.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_4_512.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_4_1024.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_4_2048.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_5.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_5_128.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_5_256.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_5_512.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_5_1024.c (caller_bf16): Likewise.
>        * gcc.target/aarch64/sve/pcs/return_5_2048.c (caller_bf16): Likewise.

OK, thanks.

Applied on master, thanks.

Tejas.


Richard
  
Prathamesh Kulkarni June 14, 2023, 7:13 a.m. UTC | #3
On Tue, 13 Jun 2023 at 12:38, Tejas Belagod via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
>
>
> From: Richard Sandiford <richard.sandiford@arm.com>
> Date: Monday, June 12, 2023 at 2:15 PM
> To: Tejas Belagod <Tejas.Belagod@arm.com>
> Cc: gcc-patches@gcc.gnu.org <gcc-patches@gcc.gnu.org>, Tejas Belagod <Tejas.Belagod@arm.com>
> Subject: Re: [PATCH v2] [PR96339] Optimise svlast[ab]
> Tejas Belagod <tejas.belagod@arm.com> writes:
> > From: Tejas Belagod <tbelagod@arm.com>
> >
> >   This PR optimizes an SVE intrinsics sequence where
> >     svlasta (svptrue_pat_b8 (SV_VL1), x)
> >   a scalar is selected based on a constant predicate and a variable vector.
> >   This sequence is optimized to return the correspoding element of a NEON
> >   vector. For eg.
> >     svlasta (svptrue_pat_b8 (SV_VL1), x)
> >   returns
> >     umov    w0, v0.b[1]
> >   Likewise,
> >     svlastb (svptrue_pat_b8 (SV_VL1), x)
> >   returns
> >      umov    w0, v0.b[0]
> >   This optimization only works provided the constant predicate maps to a range
> >   that is within the bounds of a 128-bit NEON register.
> >
> > gcc/ChangeLog:
> >
> >        PR target/96339
> >        * config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold): Fold sve
> >        calls that have a constant input predicate vector.
> >        (svlast_impl::is_lasta): Query to check if intrinsic is svlasta.
> >        (svlast_impl::is_lastb): Query to check if intrinsic is svlastb.
> >        (svlast_impl::vect_all_same): Check if all vector elements are equal.
> >
> > gcc/testsuite/ChangeLog:
> >
> >        PR target/96339
> >        * gcc.target/aarch64/sve/acle/general-c/svlast.c: New.
> >        * gcc.target/aarch64/sve/acle/general-c/svlast128_run.c: New.
> >        * gcc.target/aarch64/sve/acle/general-c/svlast256_run.c: New.
> >        * gcc.target/aarch64/sve/pcs/return_4.c (caller_bf16): Fix asm
> >        to expect optimized code for function body.
> >        * gcc.target/aarch64/sve/pcs/return_4_128.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_4_256.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_4_512.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_4_1024.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_4_2048.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_5.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_5_128.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_5_256.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_5_512.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_5_1024.c (caller_bf16): Likewise.
> >        * gcc.target/aarch64/sve/pcs/return_5_2048.c (caller_bf16): Likewise.
>
> OK, thanks.
>
> Applied on master, thanks.
Hi Tejas,
This seems to break aarch64 bootstrap build with following error due
to -Wsign-compare diagnostic:
00:18:19 /home/tcwg-buildslave/workspace/tcwg_gnu_6/abe/snapshots/gcc.git~master/gcc/config/aarch64/aarch64-sve-builtins-base.cc:1133:35:
error: comparison of integer expressions of different signedness:
‘int’ and ‘long unsigned int’ [-Werror=sign-compare]
00:18:19  1133 |                 for (i = npats; i < enelts; i += step_1)
00:18:19          |                                 ~~^~~~~~~~
00:30:46 abe-debug-build: cc1plus: all warnings being treated as errors
00:30:46 abe-debug-build: make[3]: ***
[/home/tcwg-buildslave/workspace/tcwg_gnu_6/abe/snapshots/gcc.git~master/gcc/config/aarch64/t-aarch64:96:
aarch64-sve-builtins-base.o] Error 1

Thanks,
Prathamesh
>
> Tejas.
>
>
> Richard
  
Kyrylo Tkachov June 14, 2023, 4:40 p.m. UTC | #4
> -----Original Message-----
> From: Gcc-patches <gcc-patches-
> bounces+kyrylo.tkachov=arm.com@gcc.gnu.org> On Behalf Of Prathamesh
> Kulkarni via Gcc-patches
> Sent: Wednesday, June 14, 2023 8:13 AM
> To: Tejas Belagod <Tejas.Belagod@arm.com>
> Cc: Richard Sandiford <Richard.Sandiford@arm.com>; gcc-
> patches@gcc.gnu.org
> Subject: Re: [PATCH v2] [PR96339] Optimise svlast[ab]
> 
> On Tue, 13 Jun 2023 at 12:38, Tejas Belagod via Gcc-patches
> <gcc-patches@gcc.gnu.org> wrote:
> >
> >
> >
> > From: Richard Sandiford <richard.sandiford@arm.com>
> > Date: Monday, June 12, 2023 at 2:15 PM
> > To: Tejas Belagod <Tejas.Belagod@arm.com>
> > Cc: gcc-patches@gcc.gnu.org <gcc-patches@gcc.gnu.org>, Tejas Belagod
> <Tejas.Belagod@arm.com>
> > Subject: Re: [PATCH v2] [PR96339] Optimise svlast[ab]
> > Tejas Belagod <tejas.belagod@arm.com> writes:
> > > From: Tejas Belagod <tbelagod@arm.com>
> > >
> > >   This PR optimizes an SVE intrinsics sequence where
> > >     svlasta (svptrue_pat_b8 (SV_VL1), x)
> > >   a scalar is selected based on a constant predicate and a variable vector.
> > >   This sequence is optimized to return the correspoding element of a
> NEON
> > >   vector. For eg.
> > >     svlasta (svptrue_pat_b8 (SV_VL1), x)
> > >   returns
> > >     umov    w0, v0.b[1]
> > >   Likewise,
> > >     svlastb (svptrue_pat_b8 (SV_VL1), x)
> > >   returns
> > >      umov    w0, v0.b[0]
> > >   This optimization only works provided the constant predicate maps to a
> range
> > >   that is within the bounds of a 128-bit NEON register.
> > >
> > > gcc/ChangeLog:
> > >
> > >        PR target/96339
> > >        * config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold): Fold
> sve
> > >        calls that have a constant input predicate vector.
> > >        (svlast_impl::is_lasta): Query to check if intrinsic is svlasta.
> > >        (svlast_impl::is_lastb): Query to check if intrinsic is svlastb.
> > >        (svlast_impl::vect_all_same): Check if all vector elements are equal.
> > >
> > > gcc/testsuite/ChangeLog:
> > >
> > >        PR target/96339
> > >        * gcc.target/aarch64/sve/acle/general-c/svlast.c: New.
> > >        * gcc.target/aarch64/sve/acle/general-c/svlast128_run.c: New.
> > >        * gcc.target/aarch64/sve/acle/general-c/svlast256_run.c: New.
> > >        * gcc.target/aarch64/sve/pcs/return_4.c (caller_bf16): Fix asm
> > >        to expect optimized code for function body.
> > >        * gcc.target/aarch64/sve/pcs/return_4_128.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_256.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_512.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_1024.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_2048.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_128.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_256.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_512.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_1024.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_2048.c (caller_bf16): Likewise.
> >
> > OK, thanks.
> >
> > Applied on master, thanks.
> Hi Tejas,
> This seems to break aarch64 bootstrap build with following error due
> to -Wsign-compare diagnostic:
> 00:18:19 /home/tcwg-
> buildslave/workspace/tcwg_gnu_6/abe/snapshots/gcc.git~master/gcc/config/
> aarch64/aarch64-sve-builtins-base.cc:1133:35:
> error: comparison of integer expressions of different signedness:
> ‘int’ and ‘long unsigned int’ [-Werror=sign-compare]
> 00:18:19  1133 |                 for (i = npats; i < enelts; i += step_1)
> 00:18:19          |                                 ~~^~~~~~~~
> 00:30:46 abe-debug-build: cc1plus: all warnings being treated as errors
> 00:30:46 abe-debug-build: make[3]: ***
> [/home/tcwg-
> buildslave/workspace/tcwg_gnu_6/abe/snapshots/gcc.git~master/gcc/config/
> aarch64/t-aarch64:96:
> aarch64-sve-builtins-base.o] Error 1

Fixed thusly in trunk.
Thanks,
Kyrill

gcc/ChangeLog:

	* config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold):
	Fix signed comparison warning in loop from npats to enelts.

> 
> Thanks,
> Prathamesh
> >
> > Tejas.
> >
> >
> > Richard
  
Tejas Belagod June 15, 2023, 4:29 a.m. UTC | #5
From: Kyrylo Tkachov <Kyrylo.Tkachov@arm.com>
Date: Wednesday, June 14, 2023 at 10:11 PM
To: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>, Tejas Belagod <Tejas.Belagod@arm.com>
Cc: Richard Sandiford <Richard.Sandiford@arm.com>, gcc-patches@gcc.gnu.org <gcc-patches@gcc.gnu.org>
Subject: RE: [PATCH v2] [PR96339] Optimise svlast[ab]


> -----Original Message-----
> From: Gcc-patches <gcc-patches-
> bounces+kyrylo.tkachov=arm.com@gcc.gnu.org> On Behalf Of Prathamesh
> Kulkarni via Gcc-patches
> Sent: Wednesday, June 14, 2023 8:13 AM
> To: Tejas Belagod <Tejas.Belagod@arm.com>
> Cc: Richard Sandiford <Richard.Sandiford@arm.com>; gcc-
> patches@gcc.gnu.org
> Subject: Re: [PATCH v2] [PR96339] Optimise svlast[ab]
>
> On Tue, 13 Jun 2023 at 12:38, Tejas Belagod via Gcc-patches
> <gcc-patches@gcc.gnu.org> wrote:
> >
> >
> >
> > From: Richard Sandiford <richard.sandiford@arm.com>
> > Date: Monday, June 12, 2023 at 2:15 PM
> > To: Tejas Belagod <Tejas.Belagod@arm.com>
> > Cc: gcc-patches@gcc.gnu.org <gcc-patches@gcc.gnu.org>, Tejas Belagod
> <Tejas.Belagod@arm.com>
> > Subject: Re: [PATCH v2] [PR96339] Optimise svlast[ab]
> > Tejas Belagod <tejas.belagod@arm.com> writes:
> > > From: Tejas Belagod <tbelagod@arm.com>
> > >
> > >   This PR optimizes an SVE intrinsics sequence where
> > >     svlasta (svptrue_pat_b8 (SV_VL1), x)
> > >   a scalar is selected based on a constant predicate and a variable vector.
> > >   This sequence is optimized to return the correspoding element of a
> NEON
> > >   vector. For eg.
> > >     svlasta (svptrue_pat_b8 (SV_VL1), x)
> > >   returns
> > >     umov    w0, v0.b[1]
> > >   Likewise,
> > >     svlastb (svptrue_pat_b8 (SV_VL1), x)
> > >   returns
> > >      umov    w0, v0.b[0]
> > >   This optimization only works provided the constant predicate maps to a
> range
> > >   that is within the bounds of a 128-bit NEON register.
> > >
> > > gcc/ChangeLog:
> > >
> > >        PR target/96339
> > >        * config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold): Fold
> sve
> > >        calls that have a constant input predicate vector.
> > >        (svlast_impl::is_lasta): Query to check if intrinsic is svlasta.
> > >        (svlast_impl::is_lastb): Query to check if intrinsic is svlastb.
> > >        (svlast_impl::vect_all_same): Check if all vector elements are equal.
> > >
> > > gcc/testsuite/ChangeLog:
> > >
> > >        PR target/96339
> > >        * gcc.target/aarch64/sve/acle/general-c/svlast.c: New.
> > >        * gcc.target/aarch64/sve/acle/general-c/svlast128_run.c: New.
> > >        * gcc.target/aarch64/sve/acle/general-c/svlast256_run.c: New.
> > >        * gcc.target/aarch64/sve/pcs/return_4.c (caller_bf16): Fix asm
> > >        to expect optimized code for function body.
> > >        * gcc.target/aarch64/sve/pcs/return_4_128.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_256.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_512.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_1024.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_4_2048.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_128.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_256.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_512.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_1024.c (caller_bf16): Likewise.
> > >        * gcc.target/aarch64/sve/pcs/return_5_2048.c (caller_bf16): Likewise.
> >
> > OK, thanks.
> >
> > Applied on master, thanks.
> Hi Tejas,
> This seems to break aarch64 bootstrap build with following error due
> to -Wsign-compare diagnostic:
> 00:18:19 /home/tcwg-
> buildslave/workspace/tcwg_gnu_6/abe/snapshots/gcc.git~master/gcc/config/
> aarch64/aarch64-sve-builtins-base.cc:1133:35:
> error: comparison of integer expressions of different signedness:
> ‘int’ and ‘long unsigned int’ [-Werror=sign-compare]
> 00:18:19  1133 |                 for (i = npats; i < enelts; i += step_1)
> 00:18:19          |                                 ~~^~~~~~~~
> 00:30:46 abe-debug-build: cc1plus: all warnings being treated as errors
> 00:30:46 abe-debug-build: make[3]: ***
> [/home/tcwg-
> buildslave/workspace/tcwg_gnu_6/abe/snapshots/gcc.git~master/gcc/config/
> aarch64/t-aarch64:96:
> aarch64-sve-builtins-base.o] Error 1

Fixed thusly in trunk.
Thanks,
Kyrill

gcc/ChangeLog:

        * config/aarch64/aarch64-sve-builtins-base.cc (svlast_impl::fold):
        Fix signed comparison warning in loop from npats to enelts.


Ah, sorry for breaking BS and thanks Kyrill for the fix.

Tejas.

>
> Thanks,
> Prathamesh
> >
> > Tejas.
> >
> >
> > Richard
  

Patch

diff --git a/gcc/config/aarch64/aarch64-sve-builtins-base.cc b/gcc/config/aarch64/aarch64-sve-builtins-base.cc
index cd9cace3c9b..9b766ffa817 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins-base.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins-base.cc
@@ -1056,6 +1056,139 @@  class svlast_impl : public quiet<function_base>
 public:
   CONSTEXPR svlast_impl (int unspec) : m_unspec (unspec) {}
 
+  bool is_lasta () const { return m_unspec == UNSPEC_LASTA; }
+  bool is_lastb () const { return m_unspec == UNSPEC_LASTB; }
+
+  bool vect_all_same (tree v, int step) const
+  {
+    int i;
+    int nelts = vector_cst_encoded_nelts (v);
+    tree first_el = VECTOR_CST_ENCODED_ELT (v, 0);
+
+    for (i = 0; i < nelts; i += step)
+      if (!operand_equal_p (VECTOR_CST_ENCODED_ELT (v, i), first_el, 0))
+	return false;
+
+    return true;
+  }
+
+  /* Fold a svlast{a/b} call with constant predicate to a BIT_FIELD_REF.
+     BIT_FIELD_REF lowers to Advanced SIMD element extract, so we have to
+     ensure the index of the element being accessed is in the range of a
+     Advanced SIMD vector width.  */
+  gimple *fold (gimple_folder & f) const override
+  {
+    tree pred = gimple_call_arg (f.call, 0);
+    tree val = gimple_call_arg (f.call, 1);
+
+    if (TREE_CODE (pred) == VECTOR_CST)
+      {
+	HOST_WIDE_INT pos;
+	int i = 0;
+	int step = f.type_suffix (0).element_bytes;
+	int step_1 = gcd (step, VECTOR_CST_NPATTERNS (pred));
+	int npats = VECTOR_CST_NPATTERNS (pred);
+	unsigned HOST_WIDE_INT enelts = vector_cst_encoded_nelts (pred);
+	tree b = NULL_TREE;
+	unsigned HOST_WIDE_INT nelts;
+
+	/* We can optimize 2 cases common to variable and fixed-length cases
+	   without a linear search of the predicate vector:
+	   1.  LASTA if predicate is all true, return element 0.
+	   2.  LASTA if predicate all false, return element 0.  */
+	if (is_lasta () && vect_all_same (pred, step_1))
+	  {
+	    b = build3 (BIT_FIELD_REF, TREE_TYPE (f.lhs), val,
+			bitsize_int (step * BITS_PER_UNIT), bitsize_int (0));
+	    return gimple_build_assign (f.lhs, b);
+	  }
+
+	/* Handle the all-false case for LASTB where SVE VL == 128b -
+	   return the highest numbered element.  */
+	if (is_lastb () && known_eq (BYTES_PER_SVE_VECTOR, 16)
+	    && vect_all_same (pred, step_1)
+	    && integer_zerop (VECTOR_CST_ENCODED_ELT (pred, 0)))
+	  {
+	    b = build3 (BIT_FIELD_REF, TREE_TYPE (f.lhs), val,
+			bitsize_int (step * BITS_PER_UNIT),
+			bitsize_int ((16 - step) * BITS_PER_UNIT));
+
+	    return gimple_build_assign (f.lhs, b);
+	  }
+
+	/* Determine if there are any repeating non-zero elements in variable
+	   length vectors.  */
+	if (!VECTOR_CST_NELTS (pred).is_constant (&nelts))
+	  {
+	   /* If VECTOR_CST_NELTS_PER_PATTERN (pred) == 2 and every multiple of
+	      'step_1' in
+		[VECTOR_CST_NPATTERNS .. VECTOR_CST_ENCODED_NELTS - 1]
+	      is zero, then we can treat the vector as VECTOR_CST_NPATTERNS
+	      elements followed by all inactive elements.  */
+	    if (VECTOR_CST_NELTS_PER_PATTERN (pred) == 2)
+	      {
+		/* Restrict the scope of search to NPATS if vector is
+		   variable-length for linear search later.  */
+		nelts = npats;
+		for (i = npats; i < enelts; i += step_1)
+		  {
+		    /* If there are active elements in the repeated pattern of a
+		       variable-length vector, then return NULL as there is no
+		       way to be sure statically if this falls within the
+		       Advanced SIMD range.  */
+		    if (!integer_zerop (VECTOR_CST_ENCODED_ELT (pred, i)))
+		      return NULL;
+		  }
+	      }
+	    else
+	      /* If we're here, it means that for NELTS_PER_PATTERN != 2, there
+		 is a repeating non-zero element.  */
+	      return NULL;
+	  }
+
+	/* If we're here, it means either:
+	   1. The vector is variable-length and there's no active element in the
+	      repeated part of the pattern, or
+	   2. The vector is fixed-length.
+
+	   Fall through to finding the last active element linearly for
+	   for all cases where the last active element is known to be
+	   within a statically-determinable range.  */
+	i = MAX ((int)nelts - step, 0);
+	for (; i >= 0; i -= step)
+	  if (!integer_zerop (VECTOR_CST_ELT (pred, i)))
+	    break;
+
+	if (is_lastb ())
+	  {
+	    /* For LASTB, the element is the last active element.  */
+	    pos = i;
+	  }
+	else
+	  {
+	    /* For LASTA, the element is one after last active element.  */
+	    pos = i + step;
+
+	    /* If last active element is
+	       last element, wrap-around and return first Advanced SIMD
+	       element.  */
+	    if (known_ge (pos, BYTES_PER_SVE_VECTOR))
+	      pos = 0;
+	  }
+
+	/* Out of Advanced SIMD range.  */
+	if (pos < 0 || pos > 15)
+	  return NULL;
+
+	b = build3 (BIT_FIELD_REF, TREE_TYPE (f.lhs), val,
+		    bitsize_int (step * BITS_PER_UNIT),
+		    bitsize_int (pos * BITS_PER_UNIT));
+
+	return gimple_build_assign (f.lhs, b);
+      }
+    return NULL;
+  }
+
   rtx
   expand (function_expander &e) const override
   {
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast.c
new file mode 100644
index 00000000000..fdbe5e309af
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast.c
@@ -0,0 +1,63 @@ 
+/* { dg-do compile } */
+/* { dg-options "-O3 -msve-vector-bits=256" } */
+
+#include <stdint.h>
+#include "arm_sve.h"
+
+#define NAME(name, size, pat, sign, ab) \
+  name ## _ ## size ## _ ## pat ## _ ## sign ## _ ## ab
+
+#define NAMEF(name, size, pat, sign, ab) \
+  name ## _ ## size ## _ ## pat ## _ ## sign ## _ ## ab ## _false
+
+#define SVTYPE(size, sign) \
+  sv ## sign ## int ## size ## _t
+
+#define STYPE(size, sign) sign ## int ## size ##_t
+
+#define SVELAST_DEF(size, pat, sign, ab, su) \
+  STYPE (size, sign) __attribute__((noinline)) \
+  NAME (foo, size, pat, sign, ab) (SVTYPE (size, sign) x) \
+  { \
+    return svlast ## ab (svptrue_pat_b ## size (pat), x); \
+  } \
+  STYPE (size, sign) __attribute__((noinline)) \
+  NAMEF (foo, size, pat, sign, ab) (SVTYPE (size, sign) x) \
+  { \
+    return svlast ## ab (svpfalse (), x); \
+  }
+
+#define ALL_PATS(SIZE, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL1, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL2, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL3, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL4, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL5, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL6, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL7, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL8, SIGN, AB, SU) \
+  SVELAST_DEF (SIZE, SV_VL16, SIGN, AB, SU)
+
+#define ALL_SIGN(SIZE, AB) \
+  ALL_PATS (SIZE, , AB, s) \
+  ALL_PATS (SIZE, u, AB, u)
+
+#define ALL_SIZE(AB) \
+  ALL_SIGN (8, AB) \
+  ALL_SIGN (16, AB) \
+  ALL_SIGN (32, AB) \
+  ALL_SIGN (64, AB)
+
+#define ALL_POS() \
+  ALL_SIZE (a) \
+  ALL_SIZE (b)
+
+
+ALL_POS()
+
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.b} 52 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.h} 50 } } */
+/* { dg-final { scan-assembler-times {\tumov\tw[0-9]+, v[0-9]+\.s} 12 } } */
+/* { dg-final { scan-assembler-times {\tfmov\tw0, s0} 24 } } */
+/* { dg-final { scan-assembler-times {\tumov\tx[0-9]+, v[0-9]+\.d} 4 } } */
+/* { dg-final { scan-assembler-times {\tfmov\tx0, d0} 32 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast128_run.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast128_run.c
new file mode 100644
index 00000000000..5e1e9303d7b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast128_run.c
@@ -0,0 +1,313 @@ 
+/* { dg-do run { target aarch64_sve128_hw } } */
+/* { dg-options "-O3 -msve-vector-bits=128 -std=gnu99" } */
+
+#include "svlast.c"
+
+int
+main (void)
+{
+  int8_t res_8_SV_VL1__a = 1;
+  int8_t res_8_SV_VL2__a = 2;
+  int8_t res_8_SV_VL3__a = 3;
+  int8_t res_8_SV_VL4__a = 4;
+  int8_t res_8_SV_VL5__a = 5;
+  int8_t res_8_SV_VL6__a = 6;
+  int8_t res_8_SV_VL7__a = 7;
+  int8_t res_8_SV_VL8__a = 8;
+  int8_t res_8_SV_VL16__a = 0;
+  uint8_t res_8_SV_VL1_u_a = 1;
+  uint8_t res_8_SV_VL2_u_a = 2;
+  uint8_t res_8_SV_VL3_u_a = 3;
+  uint8_t res_8_SV_VL4_u_a = 4;
+  uint8_t res_8_SV_VL5_u_a = 5;
+  uint8_t res_8_SV_VL6_u_a = 6;
+  uint8_t res_8_SV_VL7_u_a = 7;
+  uint8_t res_8_SV_VL8_u_a = 8;
+  uint8_t res_8_SV_VL16_u_a = 0;
+  int16_t res_16_SV_VL1__a = 1;
+  int16_t res_16_SV_VL2__a = 2;
+  int16_t res_16_SV_VL3__a = 3;
+  int16_t res_16_SV_VL4__a = 4;
+  int16_t res_16_SV_VL5__a = 5;
+  int16_t res_16_SV_VL6__a = 6;
+  int16_t res_16_SV_VL7__a = 7;
+  int16_t res_16_SV_VL8__a = 0;
+  int16_t res_16_SV_VL16__a = 0;
+  uint16_t res_16_SV_VL1_u_a = 1;
+  uint16_t res_16_SV_VL2_u_a = 2;
+  uint16_t res_16_SV_VL3_u_a = 3;
+  uint16_t res_16_SV_VL4_u_a = 4;
+  uint16_t res_16_SV_VL5_u_a = 5;
+  uint16_t res_16_SV_VL6_u_a = 6;
+  uint16_t res_16_SV_VL7_u_a = 7;
+  uint16_t res_16_SV_VL8_u_a = 0;
+  uint16_t res_16_SV_VL16_u_a = 0;
+  int32_t res_32_SV_VL1__a = 1;
+  int32_t res_32_SV_VL2__a = 2;
+  int32_t res_32_SV_VL3__a = 3;
+  int32_t res_32_SV_VL4__a = 0;
+  int32_t res_32_SV_VL5__a = 0;
+  int32_t res_32_SV_VL6__a = 0;
+  int32_t res_32_SV_VL7__a = 0;
+  int32_t res_32_SV_VL8__a = 0;
+  int32_t res_32_SV_VL16__a = 0;
+  uint32_t res_32_SV_VL1_u_a = 1;
+  uint32_t res_32_SV_VL2_u_a = 2;
+  uint32_t res_32_SV_VL3_u_a = 3;
+  uint32_t res_32_SV_VL4_u_a = 0;
+  uint32_t res_32_SV_VL5_u_a = 0;
+  uint32_t res_32_SV_VL6_u_a = 0;
+  uint32_t res_32_SV_VL7_u_a = 0;
+  uint32_t res_32_SV_VL8_u_a = 0;
+  uint32_t res_32_SV_VL16_u_a = 0;
+  int64_t res_64_SV_VL1__a = 1;
+  int64_t res_64_SV_VL2__a = 0;
+  int64_t res_64_SV_VL3__a = 0;
+  int64_t res_64_SV_VL4__a = 0;
+  int64_t res_64_SV_VL5__a = 0;
+  int64_t res_64_SV_VL6__a = 0;
+  int64_t res_64_SV_VL7__a = 0;
+  int64_t res_64_SV_VL8__a = 0;
+  int64_t res_64_SV_VL16__a = 0;
+  uint64_t res_64_SV_VL1_u_a = 1;
+  uint64_t res_64_SV_VL2_u_a = 0;
+  uint64_t res_64_SV_VL3_u_a = 0;
+  uint64_t res_64_SV_VL4_u_a = 0;
+  uint64_t res_64_SV_VL5_u_a = 0;
+  uint64_t res_64_SV_VL6_u_a = 0;
+  uint64_t res_64_SV_VL7_u_a = 0;
+  uint64_t res_64_SV_VL8_u_a = 0;
+  uint64_t res_64_SV_VL16_u_a = 0;
+  int8_t res_8_SV_VL1__b = 0;
+  int8_t res_8_SV_VL2__b = 1;
+  int8_t res_8_SV_VL3__b = 2;
+  int8_t res_8_SV_VL4__b = 3;
+  int8_t res_8_SV_VL5__b = 4;
+  int8_t res_8_SV_VL6__b = 5;
+  int8_t res_8_SV_VL7__b = 6;
+  int8_t res_8_SV_VL8__b = 7;
+  int8_t res_8_SV_VL16__b = 15;
+  uint8_t res_8_SV_VL1_u_b = 0;
+  uint8_t res_8_SV_VL2_u_b = 1;
+  uint8_t res_8_SV_VL3_u_b = 2;
+  uint8_t res_8_SV_VL4_u_b = 3;
+  uint8_t res_8_SV_VL5_u_b = 4;
+  uint8_t res_8_SV_VL6_u_b = 5;
+  uint8_t res_8_SV_VL7_u_b = 6;
+  uint8_t res_8_SV_VL8_u_b = 7;
+  uint8_t res_8_SV_VL16_u_b = 15;
+  int16_t res_16_SV_VL1__b = 0;
+  int16_t res_16_SV_VL2__b = 1;
+  int16_t res_16_SV_VL3__b = 2;
+  int16_t res_16_SV_VL4__b = 3;
+  int16_t res_16_SV_VL5__b = 4;
+  int16_t res_16_SV_VL6__b = 5;
+  int16_t res_16_SV_VL7__b = 6;
+  int16_t res_16_SV_VL8__b = 7;
+  int16_t res_16_SV_VL16__b = 7;
+  uint16_t res_16_SV_VL1_u_b = 0;
+  uint16_t res_16_SV_VL2_u_b = 1;
+  uint16_t res_16_SV_VL3_u_b = 2;
+  uint16_t res_16_SV_VL4_u_b = 3;
+  uint16_t res_16_SV_VL5_u_b = 4;
+  uint16_t res_16_SV_VL6_u_b = 5;
+  uint16_t res_16_SV_VL7_u_b = 6;
+  uint16_t res_16_SV_VL8_u_b = 7;
+  uint16_t res_16_SV_VL16_u_b = 7;
+  int32_t res_32_SV_VL1__b = 0;
+  int32_t res_32_SV_VL2__b = 1;
+  int32_t res_32_SV_VL3__b = 2;
+  int32_t res_32_SV_VL4__b = 3;
+  int32_t res_32_SV_VL5__b = 3;
+  int32_t res_32_SV_VL6__b = 3;
+  int32_t res_32_SV_VL7__b = 3;
+  int32_t res_32_SV_VL8__b = 3;
+  int32_t res_32_SV_VL16__b = 3;
+  uint32_t res_32_SV_VL1_u_b = 0;
+  uint32_t res_32_SV_VL2_u_b = 1;
+  uint32_t res_32_SV_VL3_u_b = 2;
+  uint32_t res_32_SV_VL4_u_b = 3;
+  uint32_t res_32_SV_VL5_u_b = 3;
+  uint32_t res_32_SV_VL6_u_b = 3;
+  uint32_t res_32_SV_VL7_u_b = 3;
+  uint32_t res_32_SV_VL8_u_b = 3;
+  uint32_t res_32_SV_VL16_u_b = 3;
+  int64_t res_64_SV_VL1__b = 0;
+  int64_t res_64_SV_VL2__b = 1;
+  int64_t res_64_SV_VL3__b = 1;
+  int64_t res_64_SV_VL4__b = 1;
+  int64_t res_64_SV_VL5__b = 1;
+  int64_t res_64_SV_VL6__b = 1;
+  int64_t res_64_SV_VL7__b = 1;
+  int64_t res_64_SV_VL8__b = 1;
+  int64_t res_64_SV_VL16__b = 1;
+  uint64_t res_64_SV_VL1_u_b = 0;
+  uint64_t res_64_SV_VL2_u_b = 1;
+  uint64_t res_64_SV_VL3_u_b = 1;
+  uint64_t res_64_SV_VL4_u_b = 1;
+  uint64_t res_64_SV_VL5_u_b = 1;
+  uint64_t res_64_SV_VL6_u_b = 1;
+  uint64_t res_64_SV_VL7_u_b = 1;
+  uint64_t res_64_SV_VL8_u_b = 1;
+  uint64_t res_64_SV_VL16_u_b = 1;
+
+  int8_t res_8_SV_VL1__a_false = 0;
+  int8_t res_8_SV_VL2__a_false = 0;
+  int8_t res_8_SV_VL3__a_false = 0;
+  int8_t res_8_SV_VL4__a_false = 0;
+  int8_t res_8_SV_VL5__a_false = 0;
+  int8_t res_8_SV_VL6__a_false = 0;
+  int8_t res_8_SV_VL7__a_false = 0;
+  int8_t res_8_SV_VL8__a_false = 0;
+  int8_t res_8_SV_VL16__a_false = 0;
+  uint8_t res_8_SV_VL1_u_a_false = 0;
+  uint8_t res_8_SV_VL2_u_a_false = 0;
+  uint8_t res_8_SV_VL3_u_a_false = 0;
+  uint8_t res_8_SV_VL4_u_a_false = 0;
+  uint8_t res_8_SV_VL5_u_a_false = 0;
+  uint8_t res_8_SV_VL6_u_a_false = 0;
+  uint8_t res_8_SV_VL7_u_a_false = 0;
+  uint8_t res_8_SV_VL8_u_a_false = 0;
+  uint8_t res_8_SV_VL16_u_a_false = 0;
+  int16_t res_16_SV_VL1__a_false = 0;
+  int16_t res_16_SV_VL2__a_false = 0;
+  int16_t res_16_SV_VL3__a_false = 0;
+  int16_t res_16_SV_VL4__a_false = 0;
+  int16_t res_16_SV_VL5__a_false = 0;
+  int16_t res_16_SV_VL6__a_false = 0;
+  int16_t res_16_SV_VL7__a_false = 0;
+  int16_t res_16_SV_VL8__a_false = 0;
+  int16_t res_16_SV_VL16__a_false = 0;
+  uint16_t res_16_SV_VL1_u_a_false = 0;
+  uint16_t res_16_SV_VL2_u_a_false = 0;
+  uint16_t res_16_SV_VL3_u_a_false = 0;
+  uint16_t res_16_SV_VL4_u_a_false = 0;
+  uint16_t res_16_SV_VL5_u_a_false = 0;
+  uint16_t res_16_SV_VL6_u_a_false = 0;
+  uint16_t res_16_SV_VL7_u_a_false = 0;
+  uint16_t res_16_SV_VL8_u_a_false = 0;
+  uint16_t res_16_SV_VL16_u_a_false = 0;
+  int32_t res_32_SV_VL1__a_false = 0;
+  int32_t res_32_SV_VL2__a_false = 0;
+  int32_t res_32_SV_VL3__a_false = 0;
+  int32_t res_32_SV_VL4__a_false = 0;
+  int32_t res_32_SV_VL5__a_false = 0;
+  int32_t res_32_SV_VL6__a_false = 0;
+  int32_t res_32_SV_VL7__a_false = 0;
+  int32_t res_32_SV_VL8__a_false = 0;
+  int32_t res_32_SV_VL16__a_false = 0;
+  uint32_t res_32_SV_VL1_u_a_false = 0;
+  uint32_t res_32_SV_VL2_u_a_false = 0;
+  uint32_t res_32_SV_VL3_u_a_false = 0;
+  uint32_t res_32_SV_VL4_u_a_false = 0;
+  uint32_t res_32_SV_VL5_u_a_false = 0;
+  uint32_t res_32_SV_VL6_u_a_false = 0;
+  uint32_t res_32_SV_VL7_u_a_false = 0;
+  uint32_t res_32_SV_VL8_u_a_false = 0;
+  uint32_t res_32_SV_VL16_u_a_false = 0;
+  int64_t res_64_SV_VL1__a_false = 0;
+  int64_t res_64_SV_VL2__a_false = 0;
+  int64_t res_64_SV_VL3__a_false = 0;
+  int64_t res_64_SV_VL4__a_false = 0;
+  int64_t res_64_SV_VL5__a_false = 0;
+  int64_t res_64_SV_VL6__a_false = 0;
+  int64_t res_64_SV_VL7__a_false = 0;
+  int64_t res_64_SV_VL8__a_false = 0;
+  int64_t res_64_SV_VL16__a_false = 0;
+  uint64_t res_64_SV_VL1_u_a_false = 0;
+  uint64_t res_64_SV_VL2_u_a_false = 0;
+  uint64_t res_64_SV_VL3_u_a_false = 0;
+  uint64_t res_64_SV_VL4_u_a_false = 0;
+  uint64_t res_64_SV_VL5_u_a_false = 0;
+  uint64_t res_64_SV_VL6_u_a_false = 0;
+  uint64_t res_64_SV_VL7_u_a_false = 0;
+  uint64_t res_64_SV_VL8_u_a_false = 0;
+  uint64_t res_64_SV_VL16_u_a_false = 0;
+  int8_t res_8_SV_VL1__b_false = 15;
+  int8_t res_8_SV_VL2__b_false = 15;
+  int8_t res_8_SV_VL3__b_false = 15;
+  int8_t res_8_SV_VL4__b_false = 15;
+  int8_t res_8_SV_VL5__b_false = 15;
+  int8_t res_8_SV_VL6__b_false = 15;
+  int8_t res_8_SV_VL7__b_false = 15;
+  int8_t res_8_SV_VL8__b_false = 15;
+  int8_t res_8_SV_VL16__b_false = 15;
+  uint8_t res_8_SV_VL1_u_b_false = 15;
+  uint8_t res_8_SV_VL2_u_b_false = 15;
+  uint8_t res_8_SV_VL3_u_b_false = 15;
+  uint8_t res_8_SV_VL4_u_b_false = 15;
+  uint8_t res_8_SV_VL5_u_b_false = 15;
+  uint8_t res_8_SV_VL6_u_b_false = 15;
+  uint8_t res_8_SV_VL7_u_b_false = 15;
+  uint8_t res_8_SV_VL8_u_b_false = 15;
+  uint8_t res_8_SV_VL16_u_b_false = 15;
+  int16_t res_16_SV_VL1__b_false = 7;
+  int16_t res_16_SV_VL2__b_false = 7;
+  int16_t res_16_SV_VL3__b_false = 7;
+  int16_t res_16_SV_VL4__b_false = 7;
+  int16_t res_16_SV_VL5__b_false = 7;
+  int16_t res_16_SV_VL6__b_false = 7;
+  int16_t res_16_SV_VL7__b_false = 7;
+  int16_t res_16_SV_VL8__b_false = 7;
+  int16_t res_16_SV_VL16__b_false = 7;
+  uint16_t res_16_SV_VL1_u_b_false = 7;
+  uint16_t res_16_SV_VL2_u_b_false = 7;
+  uint16_t res_16_SV_VL3_u_b_false = 7;
+  uint16_t res_16_SV_VL4_u_b_false = 7;
+  uint16_t res_16_SV_VL5_u_b_false = 7;
+  uint16_t res_16_SV_VL6_u_b_false = 7;
+  uint16_t res_16_SV_VL7_u_b_false = 7;
+  uint16_t res_16_SV_VL8_u_b_false = 7;
+  uint16_t res_16_SV_VL16_u_b_false = 7;
+  int32_t res_32_SV_VL1__b_false = 3;
+  int32_t res_32_SV_VL2__b_false = 3;
+  int32_t res_32_SV_VL3__b_false = 3;
+  int32_t res_32_SV_VL4__b_false = 3;
+  int32_t res_32_SV_VL5__b_false = 3;
+  int32_t res_32_SV_VL6__b_false = 3;
+  int32_t res_32_SV_VL7__b_false = 3;
+  int32_t res_32_SV_VL8__b_false = 3;
+  int32_t res_32_SV_VL16__b_false = 3;
+  uint32_t res_32_SV_VL1_u_b_false = 3;
+  uint32_t res_32_SV_VL2_u_b_false = 3;
+  uint32_t res_32_SV_VL3_u_b_false = 3;
+  uint32_t res_32_SV_VL4_u_b_false = 3;
+  uint32_t res_32_SV_VL5_u_b_false = 3;
+  uint32_t res_32_SV_VL6_u_b_false = 3;
+  uint32_t res_32_SV_VL7_u_b_false = 3;
+  uint32_t res_32_SV_VL8_u_b_false = 3;
+  uint32_t res_32_SV_VL16_u_b_false = 3;
+  int64_t res_64_SV_VL1__b_false = 1;
+  int64_t res_64_SV_VL2__b_false = 1;
+  int64_t res_64_SV_VL3__b_false = 1;
+  int64_t res_64_SV_VL4__b_false = 1;
+  int64_t res_64_SV_VL5__b_false = 1;
+  int64_t res_64_SV_VL6__b_false = 1;
+  int64_t res_64_SV_VL7__b_false = 1;
+  int64_t res_64_SV_VL8__b_false = 1;
+  int64_t res_64_SV_VL16__b_false = 1;
+  uint64_t res_64_SV_VL1_u_b_false = 1;
+  uint64_t res_64_SV_VL2_u_b_false = 1;
+  uint64_t res_64_SV_VL3_u_b_false = 1;
+  uint64_t res_64_SV_VL4_u_b_false = 1;
+  uint64_t res_64_SV_VL5_u_b_false = 1;
+  uint64_t res_64_SV_VL6_u_b_false = 1;
+  uint64_t res_64_SV_VL7_u_b_false = 1;
+  uint64_t res_64_SV_VL8_u_b_false = 1;
+  uint64_t res_64_SV_VL16_u_b_false = 1;
+
+#undef SVELAST_DEF
+#define SVELAST_DEF(size, pat, sign, ab, su) \
+	if (NAME (foo, size, pat, sign, ab) \
+	     (svindex_ ## su ## size (0, 1)) != \
+		NAME (res, size, pat, sign, ab)) \
+	  __builtin_abort (); \
+	if (NAMEF (foo, size, pat, sign, ab) \
+	     (svindex_ ## su ## size (0, 1)) != \
+		NAMEF (res, size, pat, sign, ab)) \
+	  __builtin_abort ();
+
+  ALL_POS ()
+
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast256_run.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast256_run.c
new file mode 100644
index 00000000000..f6ba7ea7d89
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general-c/svlast256_run.c
@@ -0,0 +1,314 @@ 
+/* { dg-do run { target aarch64_sve256_hw } } */
+/* { dg-options "-O3 -msve-vector-bits=256 -std=gnu99" } */
+
+#include "svlast.c"
+
+int
+main (void)
+{
+  int8_t res_8_SV_VL1__a = 1;
+  int8_t res_8_SV_VL2__a = 2;
+  int8_t res_8_SV_VL3__a = 3;
+  int8_t res_8_SV_VL4__a = 4;
+  int8_t res_8_SV_VL5__a = 5;
+  int8_t res_8_SV_VL6__a = 6;
+  int8_t res_8_SV_VL7__a = 7;
+  int8_t res_8_SV_VL8__a = 8;
+  int8_t res_8_SV_VL16__a = 16;
+  uint8_t res_8_SV_VL1_u_a = 1;
+  uint8_t res_8_SV_VL2_u_a = 2;
+  uint8_t res_8_SV_VL3_u_a = 3;
+  uint8_t res_8_SV_VL4_u_a = 4;
+  uint8_t res_8_SV_VL5_u_a = 5;
+  uint8_t res_8_SV_VL6_u_a = 6;
+  uint8_t res_8_SV_VL7_u_a = 7;
+  uint8_t res_8_SV_VL8_u_a = 8;
+  uint8_t res_8_SV_VL16_u_a = 16;
+  int16_t res_16_SV_VL1__a = 1;
+  int16_t res_16_SV_VL2__a = 2;
+  int16_t res_16_SV_VL3__a = 3;
+  int16_t res_16_SV_VL4__a = 4;
+  int16_t res_16_SV_VL5__a = 5;
+  int16_t res_16_SV_VL6__a = 6;
+  int16_t res_16_SV_VL7__a = 7;
+  int16_t res_16_SV_VL8__a = 8;
+  int16_t res_16_SV_VL16__a = 0;
+  uint16_t res_16_SV_VL1_u_a = 1;
+  uint16_t res_16_SV_VL2_u_a = 2;
+  uint16_t res_16_SV_VL3_u_a = 3;
+  uint16_t res_16_SV_VL4_u_a = 4;
+  uint16_t res_16_SV_VL5_u_a = 5;
+  uint16_t res_16_SV_VL6_u_a = 6;
+  uint16_t res_16_SV_VL7_u_a = 7;
+  uint16_t res_16_SV_VL8_u_a = 8;
+  uint16_t res_16_SV_VL16_u_a = 0;
+  int32_t res_32_SV_VL1__a = 1;
+  int32_t res_32_SV_VL2__a = 2;
+  int32_t res_32_SV_VL3__a = 3;
+  int32_t res_32_SV_VL4__a = 4;
+  int32_t res_32_SV_VL5__a = 5;
+  int32_t res_32_SV_VL6__a = 6;
+  int32_t res_32_SV_VL7__a = 7;
+  int32_t res_32_SV_VL8__a = 0;
+  int32_t res_32_SV_VL16__a = 0;
+  uint32_t res_32_SV_VL1_u_a = 1;
+  uint32_t res_32_SV_VL2_u_a = 2;
+  uint32_t res_32_SV_VL3_u_a = 3;
+  uint32_t res_32_SV_VL4_u_a = 4;
+  uint32_t res_32_SV_VL5_u_a = 5;
+  uint32_t res_32_SV_VL6_u_a = 6;
+  uint32_t res_32_SV_VL7_u_a = 7;
+  uint32_t res_32_SV_VL8_u_a = 0;
+  uint32_t res_32_SV_VL16_u_a = 0;
+  int64_t res_64_SV_VL1__a = 1;
+  int64_t res_64_SV_VL2__a = 2;
+  int64_t res_64_SV_VL3__a = 3;
+  int64_t res_64_SV_VL4__a = 0;
+  int64_t res_64_SV_VL5__a = 0;
+  int64_t res_64_SV_VL6__a = 0;
+  int64_t res_64_SV_VL7__a = 0;
+  int64_t res_64_SV_VL8__a = 0;
+  int64_t res_64_SV_VL16__a = 0;
+  uint64_t res_64_SV_VL1_u_a = 1;
+  uint64_t res_64_SV_VL2_u_a = 2;
+  uint64_t res_64_SV_VL3_u_a = 3;
+  uint64_t res_64_SV_VL4_u_a = 0;
+  uint64_t res_64_SV_VL5_u_a = 0;
+  uint64_t res_64_SV_VL6_u_a = 0;
+  uint64_t res_64_SV_VL7_u_a = 0;
+  uint64_t res_64_SV_VL8_u_a = 0;
+  uint64_t res_64_SV_VL16_u_a = 0;
+  int8_t res_8_SV_VL1__b = 0;
+  int8_t res_8_SV_VL2__b = 1;
+  int8_t res_8_SV_VL3__b = 2;
+  int8_t res_8_SV_VL4__b = 3;
+  int8_t res_8_SV_VL5__b = 4;
+  int8_t res_8_SV_VL6__b = 5;
+  int8_t res_8_SV_VL7__b = 6;
+  int8_t res_8_SV_VL8__b = 7;
+  int8_t res_8_SV_VL16__b = 15;
+  uint8_t res_8_SV_VL1_u_b = 0;
+  uint8_t res_8_SV_VL2_u_b = 1;
+  uint8_t res_8_SV_VL3_u_b = 2;
+  uint8_t res_8_SV_VL4_u_b = 3;
+  uint8_t res_8_SV_VL5_u_b = 4;
+  uint8_t res_8_SV_VL6_u_b = 5;
+  uint8_t res_8_SV_VL7_u_b = 6;
+  uint8_t res_8_SV_VL8_u_b = 7;
+  uint8_t res_8_SV_VL16_u_b = 15;
+  int16_t res_16_SV_VL1__b = 0;
+  int16_t res_16_SV_VL2__b = 1;
+  int16_t res_16_SV_VL3__b = 2;
+  int16_t res_16_SV_VL4__b = 3;
+  int16_t res_16_SV_VL5__b = 4;
+  int16_t res_16_SV_VL6__b = 5;
+  int16_t res_16_SV_VL7__b = 6;
+  int16_t res_16_SV_VL8__b = 7;
+  int16_t res_16_SV_VL16__b = 15;
+  uint16_t res_16_SV_VL1_u_b = 0;
+  uint16_t res_16_SV_VL2_u_b = 1;
+  uint16_t res_16_SV_VL3_u_b = 2;
+  uint16_t res_16_SV_VL4_u_b = 3;
+  uint16_t res_16_SV_VL5_u_b = 4;
+  uint16_t res_16_SV_VL6_u_b = 5;
+  uint16_t res_16_SV_VL7_u_b = 6;
+  uint16_t res_16_SV_VL8_u_b = 7;
+  uint16_t res_16_SV_VL16_u_b = 15;
+  int32_t res_32_SV_VL1__b = 0;
+  int32_t res_32_SV_VL2__b = 1;
+  int32_t res_32_SV_VL3__b = 2;
+  int32_t res_32_SV_VL4__b = 3;
+  int32_t res_32_SV_VL5__b = 4;
+  int32_t res_32_SV_VL6__b = 5;
+  int32_t res_32_SV_VL7__b = 6;
+  int32_t res_32_SV_VL8__b = 7;
+  int32_t res_32_SV_VL16__b = 7;
+  uint32_t res_32_SV_VL1_u_b = 0;
+  uint32_t res_32_SV_VL2_u_b = 1;
+  uint32_t res_32_SV_VL3_u_b = 2;
+  uint32_t res_32_SV_VL4_u_b = 3;
+  uint32_t res_32_SV_VL5_u_b = 4;
+  uint32_t res_32_SV_VL6_u_b = 5;
+  uint32_t res_32_SV_VL7_u_b = 6;
+  uint32_t res_32_SV_VL8_u_b = 7;
+  uint32_t res_32_SV_VL16_u_b = 7;
+  int64_t res_64_SV_VL1__b = 0;
+  int64_t res_64_SV_VL2__b = 1;
+  int64_t res_64_SV_VL3__b = 2;
+  int64_t res_64_SV_VL4__b = 3;
+  int64_t res_64_SV_VL5__b = 3;
+  int64_t res_64_SV_VL6__b = 3;
+  int64_t res_64_SV_VL7__b = 3;
+  int64_t res_64_SV_VL8__b = 3;
+  int64_t res_64_SV_VL16__b = 3;
+  uint64_t res_64_SV_VL1_u_b = 0;
+  uint64_t res_64_SV_VL2_u_b = 1;
+  uint64_t res_64_SV_VL3_u_b = 2;
+  uint64_t res_64_SV_VL4_u_b = 3;
+  uint64_t res_64_SV_VL5_u_b = 3;
+  uint64_t res_64_SV_VL6_u_b = 3;
+  uint64_t res_64_SV_VL7_u_b = 3;
+  uint64_t res_64_SV_VL8_u_b = 3;
+  uint64_t res_64_SV_VL16_u_b = 3;
+
+  int8_t res_8_SV_VL1__a_false = 0;
+  int8_t res_8_SV_VL2__a_false = 0;
+  int8_t res_8_SV_VL3__a_false = 0;
+  int8_t res_8_SV_VL4__a_false = 0;
+  int8_t res_8_SV_VL5__a_false = 0;
+  int8_t res_8_SV_VL6__a_false = 0;
+  int8_t res_8_SV_VL7__a_false = 0;
+  int8_t res_8_SV_VL8__a_false = 0;
+  int8_t res_8_SV_VL16__a_false = 0;
+  uint8_t res_8_SV_VL1_u_a_false = 0;
+  uint8_t res_8_SV_VL2_u_a_false = 0;
+  uint8_t res_8_SV_VL3_u_a_false = 0;
+  uint8_t res_8_SV_VL4_u_a_false = 0;
+  uint8_t res_8_SV_VL5_u_a_false = 0;
+  uint8_t res_8_SV_VL6_u_a_false = 0;
+  uint8_t res_8_SV_VL7_u_a_false = 0;
+  uint8_t res_8_SV_VL8_u_a_false = 0;
+  uint8_t res_8_SV_VL16_u_a_false = 0;
+  int16_t res_16_SV_VL1__a_false = 0;
+  int16_t res_16_SV_VL2__a_false = 0;
+  int16_t res_16_SV_VL3__a_false = 0;
+  int16_t res_16_SV_VL4__a_false = 0;
+  int16_t res_16_SV_VL5__a_false = 0;
+  int16_t res_16_SV_VL6__a_false = 0;
+  int16_t res_16_SV_VL7__a_false = 0;
+  int16_t res_16_SV_VL8__a_false = 0;
+  int16_t res_16_SV_VL16__a_false = 0;
+  uint16_t res_16_SV_VL1_u_a_false = 0;
+  uint16_t res_16_SV_VL2_u_a_false = 0;
+  uint16_t res_16_SV_VL3_u_a_false = 0;
+  uint16_t res_16_SV_VL4_u_a_false = 0;
+  uint16_t res_16_SV_VL5_u_a_false = 0;
+  uint16_t res_16_SV_VL6_u_a_false = 0;
+  uint16_t res_16_SV_VL7_u_a_false = 0;
+  uint16_t res_16_SV_VL8_u_a_false = 0;
+  uint16_t res_16_SV_VL16_u_a_false = 0;
+  int32_t res_32_SV_VL1__a_false = 0;
+  int32_t res_32_SV_VL2__a_false = 0;
+  int32_t res_32_SV_VL3__a_false = 0;
+  int32_t res_32_SV_VL4__a_false = 0;
+  int32_t res_32_SV_VL5__a_false = 0;
+  int32_t res_32_SV_VL6__a_false = 0;
+  int32_t res_32_SV_VL7__a_false = 0;
+  int32_t res_32_SV_VL8__a_false = 0;
+  int32_t res_32_SV_VL16__a_false = 0;
+  uint32_t res_32_SV_VL1_u_a_false = 0;
+  uint32_t res_32_SV_VL2_u_a_false = 0;
+  uint32_t res_32_SV_VL3_u_a_false = 0;
+  uint32_t res_32_SV_VL4_u_a_false = 0;
+  uint32_t res_32_SV_VL5_u_a_false = 0;
+  uint32_t res_32_SV_VL6_u_a_false = 0;
+  uint32_t res_32_SV_VL7_u_a_false = 0;
+  uint32_t res_32_SV_VL8_u_a_false = 0;
+  uint32_t res_32_SV_VL16_u_a_false = 0;
+  int64_t res_64_SV_VL1__a_false = 0;
+  int64_t res_64_SV_VL2__a_false = 0;
+  int64_t res_64_SV_VL3__a_false = 0;
+  int64_t res_64_SV_VL4__a_false = 0;
+  int64_t res_64_SV_VL5__a_false = 0;
+  int64_t res_64_SV_VL6__a_false = 0;
+  int64_t res_64_SV_VL7__a_false = 0;
+  int64_t res_64_SV_VL8__a_false = 0;
+  int64_t res_64_SV_VL16__a_false = 0;
+  uint64_t res_64_SV_VL1_u_a_false = 0;
+  uint64_t res_64_SV_VL2_u_a_false = 0;
+  uint64_t res_64_SV_VL3_u_a_false = 0;
+  uint64_t res_64_SV_VL4_u_a_false = 0;
+  uint64_t res_64_SV_VL5_u_a_false = 0;
+  uint64_t res_64_SV_VL6_u_a_false = 0;
+  uint64_t res_64_SV_VL7_u_a_false = 0;
+  uint64_t res_64_SV_VL8_u_a_false = 0;
+  uint64_t res_64_SV_VL16_u_a_false = 0;
+  int8_t res_8_SV_VL1__b_false = 31;
+  int8_t res_8_SV_VL2__b_false = 31;
+  int8_t res_8_SV_VL3__b_false = 31;
+  int8_t res_8_SV_VL4__b_false = 31;
+  int8_t res_8_SV_VL5__b_false = 31;
+  int8_t res_8_SV_VL6__b_false = 31;
+  int8_t res_8_SV_VL7__b_false = 31;
+  int8_t res_8_SV_VL8__b_false = 31;
+  int8_t res_8_SV_VL16__b_false = 31;
+  uint8_t res_8_SV_VL1_u_b_false = 31;
+  uint8_t res_8_SV_VL2_u_b_false = 31;
+  uint8_t res_8_SV_VL3_u_b_false = 31;
+  uint8_t res_8_SV_VL4_u_b_false = 31;
+  uint8_t res_8_SV_VL5_u_b_false = 31;
+  uint8_t res_8_SV_VL6_u_b_false = 31;
+  uint8_t res_8_SV_VL7_u_b_false = 31;
+  uint8_t res_8_SV_VL8_u_b_false = 31;
+  uint8_t res_8_SV_VL16_u_b_false = 31;
+  int16_t res_16_SV_VL1__b_false = 15;
+  int16_t res_16_SV_VL2__b_false = 15;
+  int16_t res_16_SV_VL3__b_false = 15;
+  int16_t res_16_SV_VL4__b_false = 15;
+  int16_t res_16_SV_VL5__b_false = 15;
+  int16_t res_16_SV_VL6__b_false = 15;
+  int16_t res_16_SV_VL7__b_false = 15;
+  int16_t res_16_SV_VL8__b_false = 15;
+  int16_t res_16_SV_VL16__b_false = 15;
+  uint16_t res_16_SV_VL1_u_b_false = 15;
+  uint16_t res_16_SV_VL2_u_b_false = 15;
+  uint16_t res_16_SV_VL3_u_b_false = 15;
+  uint16_t res_16_SV_VL4_u_b_false = 15;
+  uint16_t res_16_SV_VL5_u_b_false = 15;
+  uint16_t res_16_SV_VL6_u_b_false = 15;
+  uint16_t res_16_SV_VL7_u_b_false = 15;
+  uint16_t res_16_SV_VL8_u_b_false = 15;
+  uint16_t res_16_SV_VL16_u_b_false = 15;
+  int32_t res_32_SV_VL1__b_false = 7;
+  int32_t res_32_SV_VL2__b_false = 7;
+  int32_t res_32_SV_VL3__b_false = 7;
+  int32_t res_32_SV_VL4__b_false = 7;
+  int32_t res_32_SV_VL5__b_false = 7;
+  int32_t res_32_SV_VL6__b_false = 7;
+  int32_t res_32_SV_VL7__b_false = 7;
+  int32_t res_32_SV_VL8__b_false = 7;
+  int32_t res_32_SV_VL16__b_false = 7;
+  uint32_t res_32_SV_VL1_u_b_false = 7;
+  uint32_t res_32_SV_VL2_u_b_false = 7;
+  uint32_t res_32_SV_VL3_u_b_false = 7;
+  uint32_t res_32_SV_VL4_u_b_false = 7;
+  uint32_t res_32_SV_VL5_u_b_false = 7;
+  uint32_t res_32_SV_VL6_u_b_false = 7;
+  uint32_t res_32_SV_VL7_u_b_false = 7;
+  uint32_t res_32_SV_VL8_u_b_false = 7;
+  uint32_t res_32_SV_VL16_u_b_false = 7;
+  int64_t res_64_SV_VL1__b_false = 3;
+  int64_t res_64_SV_VL2__b_false = 3;
+  int64_t res_64_SV_VL3__b_false = 3;
+  int64_t res_64_SV_VL4__b_false = 3;
+  int64_t res_64_SV_VL5__b_false = 3;
+  int64_t res_64_SV_VL6__b_false = 3;
+  int64_t res_64_SV_VL7__b_false = 3;
+  int64_t res_64_SV_VL8__b_false = 3;
+  int64_t res_64_SV_VL16__b_false = 3;
+  uint64_t res_64_SV_VL1_u_b_false = 3;
+  uint64_t res_64_SV_VL2_u_b_false = 3;
+  uint64_t res_64_SV_VL3_u_b_false = 3;
+  uint64_t res_64_SV_VL4_u_b_false = 3;
+  uint64_t res_64_SV_VL5_u_b_false = 3;
+  uint64_t res_64_SV_VL6_u_b_false = 3;
+  uint64_t res_64_SV_VL7_u_b_false = 3;
+  uint64_t res_64_SV_VL8_u_b_false = 3;
+  uint64_t res_64_SV_VL16_u_b_false = 3;
+
+
+#undef SVELAST_DEF
+#define SVELAST_DEF(size, pat, sign, ab, su) \
+	if (NAME (foo, size, pat, sign, ab) \
+	     (svindex_ ## su ## size (0 ,1)) != \
+		NAME (res, size, pat, sign, ab)) \
+	  __builtin_abort (); \
+	if (NAMEF (foo, size, pat, sign, ab) \
+	     (svindex_ ## su ## size (0 ,1)) != \
+		NAMEF (res, size, pat, sign, ab)) \
+	  __builtin_abort ();
+
+  ALL_POS ()
+
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4.c
index 1e38371842f..91fdd3c202e 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4.c
@@ -186,8 +186,6 @@  CALLER (f16, __SVFloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, all
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_1024.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_1024.c
index 491c35af221..7d824caae1b 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_1024.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_1024.c
@@ -186,8 +186,6 @@  CALLER (f16, __SVFloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl128
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_128.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_128.c
index eebb913273a..e0aa3a5fa68 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_128.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_128.c
@@ -186,8 +186,6 @@  CALLER (f16, __SVFloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl16
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_2048.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_2048.c
index 73c3b2ec045..3238015d9eb 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_2048.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_2048.c
@@ -186,8 +186,6 @@  CALLER (f16, __SVFloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl256
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_256.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_256.c
index 29744c81402..50861098934 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_256.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_256.c
@@ -186,8 +186,6 @@  CALLER (f16, __SVFloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl32
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_512.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_512.c
index cf25c31bcbf..300dacce955 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_512.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_4_512.c
@@ -186,8 +186,6 @@  CALLER (f16, __SVFloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl64
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5.c
index 9ad3e227654..0a840a38384 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5.c
@@ -186,8 +186,6 @@  CALLER (f16, svfloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, all
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_1024.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_1024.c
index d573e5fc69c..18cefbff1e6 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_1024.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_1024.c
@@ -186,8 +186,6 @@  CALLER (f16, svfloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl128
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_128.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_128.c
index 200b0eb8242..c622ed55674 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_128.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_128.c
@@ -186,8 +186,6 @@  CALLER (f16, svfloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl16
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_2048.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_2048.c
index f6f8858fd47..3286280687d 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_2048.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_2048.c
@@ -186,8 +186,6 @@  CALLER (f16, svfloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl256
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_256.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_256.c
index e62f59cc885..3c6afa2fdf1 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_256.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_256.c
@@ -186,8 +186,6 @@  CALLER (f16, svfloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl32
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_512.c b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_512.c
index 483558cb576..bb7d3ebf9d4 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_512.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/pcs/return_5_512.c
@@ -186,8 +186,6 @@  CALLER (f16, svfloat16_t)
 ** caller_bf16:
 **	...
 **	bl	callee_bf16
-**	ptrue	(p[0-7])\.b, vl64
-**	lasta	h0, \1, z0\.h
 **	ldp	x29, x30, \[sp\], 16
 **	ret
 */