On Linux/x86_64,

0682a32c026f1e246eb07bb8066abca4636f01d8 is the first bad commit
commit 0682a32c026f1e246eb07bb8066abca4636f01d8
Author: Richard Biener <rguent...@suse.de>
Date:   Mon Jul 3 13:59:33 2023 +0200

    tree-optimization/110310 - move vector epilogue disabling to analysis phase

caused

FAIL: gcc.dg/vect/slp-perm-9.c -flto -ffat-lto-objects  scan-tree-dump-not vect 
"permutation requires at least three vectors"
FAIL: gcc.dg/vect/slp-perm-9.c -flto -ffat-lto-objects  scan-tree-dump-times 
vect "vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/slp-perm-9.c scan-tree-dump-not vect "permutation requires at 
least three vectors"
FAIL: gcc.dg/vect/slp-perm-9.c scan-tree-dump-times vect "vectorizing stmts 
using SLP" 1

with GCC configured with

../../gcc/configure 
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-2281/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-perm-9.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/slp-perm-9.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)

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