On Linux/x86_64,

f167db1fa47db24fdb93e9ef75c2786245702e09 is the first bad commit
commit f167db1fa47db24fdb93e9ef75c2786245702e09
Author: Paul-Antoine Arras <[email protected]>
Date:   Wed Jul 1 18:51:07 2026 +0200

    openmp: Pass iteration count to static worksharing builtins for OMPT

caused

FAIL: c-c++-common/analyzer/omp-parallel-for-1.c (test for excess errors)

with GCC configured with

../../gcc/configure 
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r17-2289/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="analyzer.exp=c-c++-common/analyzer/omp-parallel-for-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="analyzer.exp=c-c++-common/analyzer/omp-parallel-for-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="analyzer.exp=c-c++-common/analyzer/omp-parallel-for-1.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="analyzer.exp=c-c++-common/analyzer/omp-parallel-for-1.c 
--target_board='unix{-m64\ -march=cascadelake}'"

(Please directly reply to this email for question about this report.)
(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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