https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109175
Bug ID: 109175
Summary: error: 'void* __builtin_memset(void*, int, long
unsigned int)' writing 4 or more bytes into a region
of size 0 overflows the destination
[-Werror=stringop-overflow=]
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: malat at debian dot org
Target Milestone: ---
A new warning is appearing in the highway compilation logs on aarch64:
[...]
FAILED: CMakeFiles/convert_test.dir/hwy/tests/convert_test.cc.o
/usr/lib/gcc-snapshot/bin/g++ -DHWY_SHARED_DEFINE -I"/<<PKGBUILDDIR>>" -g -O2
-ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat
-Werror=format-security -DHWY_BROKEN_EMU128=0 -Wdate-time -D_FORTIFY_SOURCE=2
-fPIE -fvisibility=hidden -fvisibility-inlines-hidden
-Wno-builtin-macro-redefined -D__DATE__=\"redacted\"
-D__TIMESTAMP__=\"redacted\" -D__TIME__=\"redacted\" -fmerge-all-constants
-Wall -Wextra -Wconversion -Wsign-conversion -Wvla -Wnon-virtual-dtor
-fmath-errno -fno-exceptions -Werror -DHWY_IS_TEST=1 -DGTEST_HAS_PTHREAD=1 -MD
-MT CMakeFiles/convert_test.dir/hwy/tests/convert_test.cc.o -MF
CMakeFiles/convert_test.dir/hwy/tests/convert_test.cc.o.d -o
CMakeFiles/convert_test.dir/hwy/tests/convert_test.cc.o -c
'/<<PKGBUILDDIR>>/hwy/tests/convert_test.cc'
In file included from /<<PKGBUILDDIR>>/hwy/foreach_target.h:114,
from /<<PKGBUILDDIR>>/hwy/tests/convert_test.cc:26:
In function 'hwy::AlignedFreeUniquePtr<float []> hwy::N_SVE2::F16TestCases(D,
size_t&) [with D = Simd<float, 64, 0>]',
inlined from 'void hwy::N_SVE2::TestF16::operator()(TF32, DF32) [with TF32
= float; DF32 = hwy::N_SVE2::Simd<float, 64, 0>]' at
/<<PKGBUILDDIR>>/hwy/tests/convert_test.cc:300:10:
/<<PKGBUILDDIR>>/hwy/tests/convert_test.cc:288:11: error: 'void*
__builtin_memset(void*, int, long unsigned int)' writing 4 or more bytes into a
region of size 0 overflows the destination [-Werror=stringop-overflow=]
288 | in[i] = 0.0f;
In function 'void hwy::N_SVE2::TestF16::operator()(TF32, DF32) [with TF32 =
float; DF32 = hwy::N_SVE2::Simd<float, 64, 0>]':
cc1plus: note: destination object is likely at address zero
In file included from /<<PKGBUILDDIR>>/hwy/foreach_target.h:103:
In function 'hwy::AlignedFreeUniquePtr<float []> hwy::N_SVE::F16TestCases(D,
size_t&) [with D = Simd<float, 64, 0>]',
inlined from 'void hwy::N_SVE::TestF16::operator()(TF32, DF32) [with TF32 =
float; DF32 = hwy::N_SVE::Simd<float, 64, 0>]' at
/<<PKGBUILDDIR>>/hwy/tests/convert_test.cc:300:10:
/<<PKGBUILDDIR>>/hwy/tests/convert_test.cc:288:11: error: 'void*
__builtin_memset(void*, int, long unsigned int)' writing 4 or more bytes into a
region of size 0 overflows the destination [-Werror=stringop-overflow=]
288 | in[i] = 0.0f;
In function 'void hwy::N_SVE::TestF16::operator()(TF32, DF32) [with TF32 =
float; DF32 = hwy::N_SVE::Simd<float, 64, 0>]':
cc1plus: note: destination object is likely at address zero
cc1plus: all warnings being treated as errors
[...]
ref:
*
https://buildd.debian.org/status/fetch.php?pkg=highway&arch=arm64&ver=1.0.4%7Egit20230308.a1d7764-1&stamp=1679052435&raw=0
