[r15-3352 Regression] FAIL: gcc.target/i386/vnniint8-auto-vectorize-3.c (test for excess errors) on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

b1f9fbb6da1a3ced57c3668cecc9f9449e1b237e is the first bad commit
commit b1f9fbb6da1a3ced57c3668cecc9f9449e1b237e
Author: Haochen Jiang <haochen.jiang@intel.com>
Date:   Mon Sep 2 10:24:29 2024 +0800

    i386: Auto vectorize sdot_prod, usdot_prod, udot_prod with AVX10.2 instructions

caused

FAIL: gcc.target/i386/vnniint16-auto-vectorize-3.c (test for excess errors)
FAIL: gcc.target/i386/vnniint8-auto-vectorize-3.c (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r15-3352/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/vnniint16-auto-vectorize-3.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vnniint16-auto-vectorize-3.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vnniint8-auto-vectorize-3.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vnniint8-auto-vectorize-3.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.)