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* [r13-2548 Regression] FAIL: 29_atomics/atomic_ref/ execution test on Linux/x86_64
@ 2022-09-10  6:41 haochen.jiang
  0 siblings, 0 replies; only message in thread
From: haochen.jiang @ 2022-09-10  6:41 UTC (permalink / raw)
  To: haochen.jiang, gcc-patches, gcc-regression, trodgers

On Linux/x86_64,

157236dbd621644b3cec50b6cf38811959f3e78c is the first bad commit
commit 157236dbd621644b3cec50b6cf38811959f3e78c
Author: Thomas Rodgers <>
Date:   Thu Aug 25 12:11:40 2022 +0200

    libstdc++: Clear padding bits in atomic compare_exchange


FAIL: 29_atomics/atomic_ref/ 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/ --target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check RUNTESTFLAGS="conformance.exp=29_atomics/atomic_ref/ --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

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