On Linux/x86_64,

b5476e4c881b0d2bfbbfb84ee38d791123acf8e1 is the first bad commit
commit b5476e4c881b0d2bfbbfb84ee38d791123acf8e1
Author: Julian Brown <jul...@codesourcery.com>
Date:   Mon Nov 15 02:23:49 2021 -0800

    OpenMP: lvalue parsing for map/to/from clauses (C)

caused

FAIL: gcc.dg/gomp/bad-array-section-c-3.c  at line 14 (test for warnings, line 
12)

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-7158/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="gomp.exp=gcc.dg/gomp/bad-array-section-c-3.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="gomp.exp=gcc.dg/gomp/bad-array-section-c-3.c 
--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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