[r14-2386 Regression] FAIL: gcc.target/i386/pr91681-1.c scan-assembler-not xor on Linux/x86_64

[r14-2386 Regression] FAIL: gcc.target/i386/pr91681-1.c scan-assembler-not xor on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

bdf2737cda53a83332db1a1a021653447b05a7e7 is the first bad commit
commit bdf2737cda53a83332db1a1a021653447b05a7e7
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Fri Jul 7 20:39:58 2023 +0100

    i386: Improve __int128 argument passing (in ix86_expand_move).

caused

FAIL: gcc.target/i386/pr82580.c scan-assembler-not \\mmovzb
FAIL: gcc.target/i386/pr91681-1.c scan-assembler-not xor

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-2386/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/pr82580.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr82580.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr91681-1.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr91681-1.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.)
(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.)