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* [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
@ 2023-05-31 7:29 clyon at gcc dot gnu.org
2023-05-31 10:30 ` [Bug libstdc++/110050] " mkretz at gcc dot gnu.org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: clyon at gcc dot gnu.org @ 2023-05-31 7:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
Bug ID: 110050
Summary: experimental/simd/pr109822_cast_functions.cc fails on
arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: clyon at gcc dot gnu.org
Target Milestone: ---
After commit g:668d43502f465d48adbc1fe2956b979f36657e5f, I've noticed that
experimental/simd/pr109822_cast_functions.cc is now failing on arm targets:
FAIL: experimental/simd/pr109822_cast_functions.cc -ffast-math -O2 -Wno-psabi
(test for excess errors)
Excess errors:
/libstdc++-v3/include/experimental/bits/simd.h:2418: error: static assertion
failed: should use explicit specialization above
/libstdc++-v3/include/experimental/bits/simd.h:2421: error: invalid use of
incomplete type 'struct
std::experimental::parallelism_v2::__intrinsic_type<long double, 16, void>'
/libstdc++-v3/include/experimental/bits/simd_builtin.h:827: error: invalid
application of '__alignof__' to incomplete type
'std::experimental::parallelism_v2::_GnuTraits<long double, long long int,
std::experimental::parallelism_v2::simd_abi::_VecBuiltin<16>, 2>::_SimdMember'
{aka 'std::experimental::parallelism_v2::_SimdWrapper<long double, 2, void>'}
/libstdc++-v3/include/experimental/bits/simd.h:5492: error: requested alignment
is not an integer constant
/libstdc++-v3/include/experimental/bits/simd.h:5492: error:
'std::experimental::parallelism_v2::simd<_Tp, _Abi>::_M_data' has incomplete
type
/libstdc++-v3/include/experimental/bits/simd.h:4529: [ skipping 2
instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
[...]
I noticed this on trunk, I didn't check all the releases branches, but I
noticed that this commit was backported to gcc 11, 12 and 13.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
@ 2023-05-31 10:30 ` mkretz at gcc dot gnu.org
2023-05-31 15:15 ` clyon at gcc dot gnu.org
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: mkretz at gcc dot gnu.org @ 2023-05-31 10:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2023-05-31
Assignee|unassigned at gcc dot gnu.org |mkretz at gcc dot gnu.org
Status|UNCONFIRMED |ASSIGNED
Ever confirmed|0 |1
--- Comment #1 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
That looks like a bug in the test, using a type that isn't available on ARM.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
2023-05-31 10:30 ` [Bug libstdc++/110050] " mkretz at gcc dot gnu.org
@ 2023-05-31 15:15 ` clyon at gcc dot gnu.org
2023-05-31 15:25 ` clyon at gcc dot gnu.org
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: clyon at gcc dot gnu.org @ 2023-05-31 15:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
--- Comment #2 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Just noticed that the test passes if GCC is configured --with-arch=armv7-a, but
fails when forcing -march=armv8-a
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
2023-05-31 10:30 ` [Bug libstdc++/110050] " mkretz at gcc dot gnu.org
2023-05-31 15:15 ` clyon at gcc dot gnu.org
@ 2023-05-31 15:25 ` clyon at gcc dot gnu.org
2023-06-01 8:49 ` cvs-commit at gcc dot gnu.org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: clyon at gcc dot gnu.org @ 2023-05-31 15:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
So we have a different behavior in
libstdc++-v3/include/experimental/bits/simd_detail.h:
#if defined __ARM_NEON && (__ARM_ARCH >= 8 || defined __aarch64__)
#define _GLIBCXX_SIMD_HAVE_NEON_A32 1
#else
#define _GLIBCXX_SIMD_HAVE_NEON_A32 0
#endif
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
` (2 preceding siblings ...)
2023-05-31 15:25 ` clyon at gcc dot gnu.org
@ 2023-06-01 8:49 ` cvs-commit at gcc dot gnu.org
2023-06-01 8:51 ` mkretz at gcc dot gnu.org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2023-06-01 8:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Matthias Kretz <mkretz@gcc.gnu.org>:
https://gcc.gnu.org/g:2fbbaa77c8468ed2bdf2cfa1a5890991e4e98eef
commit r14-1463-g2fbbaa77c8468ed2bdf2cfa1a5890991e4e98eef
Author: Matthias Kretz <m.kretz@gsi.de>
Date: Thu Jun 1 10:40:14 2023 +0200
libstdc++: Fix condition for supported SIMD types on ARMv8
Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
libstdc++-v3/ChangeLog:
PR libstdc++/110050
* include/experimental/bits/simd.h (__vectorized_sizeof): With
__have_neon_a32 only single-precision float works (in addition
to integers).
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
` (3 preceding siblings ...)
2023-06-01 8:49 ` cvs-commit at gcc dot gnu.org
@ 2023-06-01 8:51 ` mkretz at gcc dot gnu.org
2023-06-02 7:03 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: mkretz at gcc dot gnu.org @ 2023-06-01 8:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
--- Comment #5 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
The issue was an incorrect condition for SIMD support, which wanted to say only
single-precision float SIMD is available. It did that by excluding double,
failing to also exclude long double.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
` (4 preceding siblings ...)
2023-06-01 8:51 ` mkretz at gcc dot gnu.org
@ 2023-06-02 7:03 ` rguenth at gcc dot gnu.org
2023-06-02 7:08 ` mkretz at gcc dot gnu.org
2024-05-07 16:19 ` cvs-commit at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-06-02 7:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed I suppose.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
` (5 preceding siblings ...)
2023-06-02 7:03 ` rguenth at gcc dot gnu.org
@ 2023-06-02 7:08 ` mkretz at gcc dot gnu.org
2024-05-07 16:19 ` cvs-commit at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: mkretz at gcc dot gnu.org @ 2023-06-02 7:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
--- Comment #7 from Matthias Kretz (Vir) <mkretz at gcc dot gnu.org> ---
Yes, I still need to backport because the new test is also present on the
branches.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug libstdc++/110050] experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f
2023-05-31 7:29 [Bug libstdc++/110050] New: experimental/simd/pr109822_cast_functions.cc fails on arm after g:668d43502f465d48adbc1fe2956b979f36657e5f clyon at gcc dot gnu.org
` (6 preceding siblings ...)
2023-06-02 7:08 ` mkretz at gcc dot gnu.org
@ 2024-05-07 16:19 ` cvs-commit at gcc dot gnu.org
7 siblings, 0 replies; 9+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2024-05-07 16:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110050
--- Comment #8 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Matthias Kretz
<mkretz@gcc.gnu.org>:
https://gcc.gnu.org/g:e6b19675fb3397992a8f88ef031d57c4dcd73cd6
commit r13-8703-ge6b19675fb3397992a8f88ef031d57c4dcd73cd6
Author: Matthias Kretz <m.kretz@gsi.de>
Date: Thu Jun 1 10:40:14 2023 +0200
libstdc++: Fix condition for supported SIMD types on ARMv8
Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
libstdc++-v3/ChangeLog:
PR libstdc++/110050
* include/experimental/bits/simd.h (__vectorized_sizeof): With
__have_neon_a32 only single-precision float works (in addition
to integers).
(cherry picked from commit 2fbbaa77c8468ed2bdf2cfa1a5890991e4e98eef)
^ permalink raw reply [flat|nested] 9+ messages in thread
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2023-05-31 10:30 ` [Bug libstdc++/110050] " mkretz at gcc dot gnu.org
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