On Linux/x86_64,

25413fdb2ac24933214123e24ba165026452a6f2 is the first bad commit
commit 25413fdb2ac24933214123e24ba165026452a6f2
Author: Andre Vieira <andre.simoesdiasvie...@arm.com>
Date:   Tue Oct 11 10:49:27 2022 +0100

    vect: Teach vectorizer how to handle bitfield accesses

caused

FAIL: gcc.target/i386/pr101668.c scan-assembler vpmovsxdq
FAIL: gcc.target/i386/pr92658-avx2-2.c scan-assembler-times pmovsxbd 2
FAIL: gcc.target/i386/pr92658-avx2-2.c scan-assembler-times pmovsxbq 2
FAIL: gcc.target/i386/pr92658-avx2-2.c scan-assembler-times pmovsxbw 2
FAIL: gcc.target/i386/pr92658-avx2-2.c scan-assembler-times pmovsxdq 2
FAIL: gcc.target/i386/pr92658-avx2-2.c scan-assembler-times pmovsxwd 2
FAIL: gcc.target/i386/pr92658-avx2-2.c scan-assembler-times pmovsxwq 2
FAIL: gcc.target/i386/pr92658-avx2.c scan-assembler-times pmovzxbd 2
FAIL: gcc.target/i386/pr92658-avx2.c scan-assembler-times pmovzxbq 2
FAIL: gcc.target/i386/pr92658-avx2.c scan-assembler-times pmovzxbw 2
FAIL: gcc.target/i386/pr92658-avx2.c scan-assembler-times pmovzxdq 2
FAIL: gcc.target/i386/pr92658-avx2.c scan-assembler-times pmovzxwd 2
FAIL: gcc.target/i386/pr92658-avx2.c scan-assembler-times pmovzxwq 2
FAIL: gcc.target/i386/pr92658-avx512bw-2.c scan-assembler-times pmovsxbd 2
FAIL: gcc.target/i386/pr92658-avx512bw-2.c scan-assembler-times pmovsxbq 2
FAIL: gcc.target/i386/pr92658-avx512bw-2.c scan-assembler-times pmovsxbw 2
FAIL: gcc.target/i386/pr92658-avx512bw-2.c scan-assembler-times pmovsxdq 2
FAIL: gcc.target/i386/pr92658-avx512bw-2.c scan-assembler-times pmovsxwd 2
FAIL: gcc.target/i386/pr92658-avx512bw-2.c scan-assembler-times pmovsxwq 2
FAIL: gcc.target/i386/pr92658-avx512bw.c scan-assembler-times pmovzxbd 2
FAIL: gcc.target/i386/pr92658-avx512bw.c scan-assembler-times pmovzxbq 2
FAIL: gcc.target/i386/pr92658-avx512bw.c scan-assembler-times pmovzxbw 2
FAIL: gcc.target/i386/pr92658-avx512bw.c scan-assembler-times pmovzxdq 2
FAIL: gcc.target/i386/pr92658-avx512bw.c scan-assembler-times pmovzxwd 2
FAIL: gcc.target/i386/pr92658-avx512bw.c scan-assembler-times pmovzxwq 2
FAIL: gcc.target/i386/pr92658-avx512bw-trunc.c scan-assembler-times vpmovwb 3
FAIL: gcc.target/i386/pr92658-avx512f.c scan-assembler-times vpmovdb 1
FAIL: gcc.target/i386/pr92658-avx512f.c scan-assembler-times vpmovdw 1
FAIL: gcc.target/i386/pr92658-avx512f.c scan-assembler-times vpmovqb 1
FAIL: gcc.target/i386/pr92658-avx512f.c scan-assembler-times vpmovqd 1
FAIL: gcc.target/i386/pr92658-avx512f.c scan-assembler-times vpmovqw 1
FAIL: gcc.target/i386/pr92658-avx512vl.c scan-assembler-times vpmovdb 2
FAIL: gcc.target/i386/pr92658-avx512vl.c scan-assembler-times vpmovdw 2
FAIL: gcc.target/i386/pr92658-avx512vl.c scan-assembler-times vpmovqb[ \t]*%xmm 
1
FAIL: gcc.target/i386/pr92658-avx512vl.c scan-assembler-times vpmovqb[ \t]*%ymm 
1
FAIL: gcc.target/i386/pr92658-avx512vl.c scan-assembler-times vpmovqd 2
FAIL: gcc.target/i386/pr92658-avx512vl.c scan-assembler-times vpmovqw 2
FAIL: gcc.target/i386/pr92658-sse4-2.c scan-assembler-times pmovsxbd 2
FAIL: gcc.target/i386/pr92658-sse4-2.c scan-assembler-times pmovsxbq 2
FAIL: gcc.target/i386/pr92658-sse4-2.c scan-assembler-times pmovsxbw 2
FAIL: gcc.target/i386/pr92658-sse4-2.c scan-assembler-times pmovsxdq 2
FAIL: gcc.target/i386/pr92658-sse4-2.c scan-assembler-times pmovsxwd 2
FAIL: gcc.target/i386/pr92658-sse4-2.c scan-assembler-times pmovsxwq 2
FAIL: gcc.target/i386/pr92658-sse4.c scan-assembler-times pmovzxbd 2
FAIL: gcc.target/i386/pr92658-sse4.c scan-assembler-times pmovzxbq 2
FAIL: gcc.target/i386/pr92658-sse4.c scan-assembler-times pmovzxbw 2
FAIL: gcc.target/i386/pr92658-sse4.c scan-assembler-times pmovzxdq 2
FAIL: gcc.target/i386/pr92658-sse4.c scan-assembler-times pmovzxwd 2
FAIL: gcc.target/i386/pr92658-sse4.c scan-assembler-times pmovzxwq 2

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r13-3219/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="i386.exp=gcc.target/i386/pr101668.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr101668.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr101668.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr101668.c --target_board='unix{-m64\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2-2.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2-2.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2-2.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2-2.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx2.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-2.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-2.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-2.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-2.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-trunc.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-trunc.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-trunc.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512bw-trunc.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512f.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512f.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512f.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512f.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512vl.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512vl.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512vl.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-avx512vl.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4-2.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4-2.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4-2.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4-2.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr92658-sse4.c 
--target_board='unix{-m64\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me 
at haochen dot jiang at intel.com)

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