[r15-6751 Regression] FAIL: gcc.target/i386/pr118017.c (test for excess errors) on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

fab96de044f1f023f52d43af866205d17d8895fb is the first bad commit
commit fab96de044f1f023f52d43af866205d17d8895fb
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Thu Jan 9 16:22:02 2025 -0500

    [PR118017][LRA]: Don't inherit reg of non-uniform reg class

caused

FAIL: gcc.target/i386/pr118017.c (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r15-6751/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/pr118017.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr118017.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.)