On Linux/x86_64,

fb1649f8b4ad5043dd0e65e4e3a643a0ced018a9 is the first bad commit
commit fb1649f8b4ad5043dd0e65e4e3a643a0ced018a9
Author: Matthias Kretz <m.kr...@gsi.de>
Date:   Mon May 6 12:13:55 2024 +0200

    libstdc++: Use __builtin_shufflevector for simd split and concat

caused

FAIL: experimental/simd/pr109261_constexpr_simd.cc -msse2 -O2 -Wno-psabi (test 
for excess errors)

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r15-429/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=experimental/simd/pr109261_constexpr_simd.cc 
--target_board='unix{-m32}'"

(Please do not reply to this email, for question about this report, contact me 
at haochen dot jiang at intel.com.)
(If you met problems with cascadelake related, disabling AVX512F in command 
line might save that.)
(However, please make sure that there is no potential problems with AVX512.)

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