On Linux/x86_64,
157236dbd621644b3cec50b6cf38811959f3e78c is the first bad commit
commit 157236dbd621644b3cec50b6cf38811959f3e78c
Author: Thomas Rodgers <trodg...@redhat.com>
Date: Thu Aug 25 12:11:40 2022 +0200
libstdc++: Clear padding bits in atomic compare_exchange
caused
FAIL: 29_atomics/atomic_ref/compare_exchange_padding.cc execution test
with GCC configured with
../../gcc/configure
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r13-2548/usr
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld
--with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl
--enable-libmpx x86_64-linux --disable-bootstrap
To reproduce:
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check
RUNTESTFLAGS="conformance.exp=29_atomics/atomic_ref/compare_exchange_padding.cc
--target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check
RUNTESTFLAGS="conformance.exp=29_atomics/atomic_ref/compare_exchange_padding.cc
--target_board='unix{-m32\ -march=cascadelake}'"
(Please do not reply to this email, for question about this report, contact me
at haochen dot jiang at intel.com)
