[r12-1773 Regression] FAIL: gcc.dg/vect/pr96854.c (test for excess errors) on Linux/x86_64

[sunil.k.pandey]

On Linux/x86_64,

7a6c31f0f84a7295433ebac09b94fae2d5cc2892 is the first bad commit
commit 7a6c31f0f84a7295433ebac09b94fae2d5cc2892
Author: Richard Biener <rguenther@suse.de>
Date:   Mon May 31 13:19:01 2021 +0200

    Add x86 addsub SLP pattern

caused

FAIL: gcc.dg/vect/pr96854.c -flto -ffat-lto-objects (internal compiler error)
FAIL: gcc.dg/vect/pr96854.c -flto -ffat-lto-objects (test for excess errors)
FAIL: gcc.dg/vect/pr96854.c (internal compiler error)
FAIL: gcc.dg/vect/pr96854.c (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-1773/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="vect.exp=gcc.dg/vect/pr96854.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/pr96854.c --target_board='unix{-m64\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me at skpgkp2 at gmail dot com)