On Linux/x86_64,

63ae6bc60c0f67fb2791991bf4b6e7e0a907d420 is the first bad commit
commit 63ae6bc60c0f67fb2791991bf4b6e7e0a907d420
Author: Xi Ruoyao <xry...@xry111.site>
Date:   Thu Jul 6 23:08:57 2023 +0800

    vect: Fix vectorized BIT_FIELD_REF for signed bit-fields [PR110557]

caused

FAIL: g++.dg/vect/pr110557.cc  -std=c++14 (test for excess errors)
FAIL: g++.dg/vect/pr110557.cc  -std=c++17 (test for excess errors)
FAIL: g++.dg/vect/pr110557.cc  -std=c++20 (test for excess errors)
FAIL: g++.dg/vect/pr110557.cc  -std=c++98 (test for excess errors)

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-2407/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}/gcc && make check 
RUNTESTFLAGS="vect.exp=g++.dg/vect/pr110557.cc --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=g++.dg/vect/pr110557.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.)
(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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