[r11-3966 Regression] FAIL: gcc.dg/vect/slp-21.c scan-tree-dump-times vect "vectorizing stmts using SLP" 2 on Linux/x86_64

[sunil.k.pandey]

On Linux/x86_64,

429ad0bb0d3dc77e44f95620341da4938d49168e is the first bad commit
commit 429ad0bb0d3dc77e44f95620341da4938d49168e
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Oct 15 11:55:53 2020 +0200

    tree-optimization/97428 - split SLP groups for loop vectorization

caused

FAIL: gcc.dg/vect/slp-11b.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorizing stmts using SLP" 0
FAIL: gcc.dg/vect/slp-11b.c scan-tree-dump-times vect "vectorizing stmts using SLP" 0
FAIL: gcc.dg/vect/slp-21.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorizing stmts using SLP" 2
FAIL: gcc.dg/vect/slp-21.c scan-tree-dump-times vect "vectorizing stmts using SLP" 2

with GCC configured with

Configured with: ../../gcc/configure --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r11-3966/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/slp-11b.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/slp-11b.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/slp-21.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/slp-21.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)