On Linux/x86_64,

dae673abd37d400408959497e50fe1f3fbef5533 is the first bad commit
commit dae673abd37d400408959497e50fe1f3fbef5533
Author: Richard Biener <rguent...@suse.de>
Date:   Wed Oct 7 10:42:12 2020 +0200

    tree-optimization/97307 - improve sinking of loads

caused

FAIL: gcc.dg/vect/pr65947-3.c -flto -ffat-lto-objects  scan-tree-dump-times 
vect "LOOP VECTORIZED" 1
FAIL: gcc.dg/vect/pr65947-3.c scan-tree-dump-times vect "LOOP VECTORIZED" 1

with GCC configured with

Configured with: ../../gcc/configure 
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r11-3705/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/pr65947-3.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="vect.exp=gcc.dg/vect/pr65947-3.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)

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