On Linux/x86_64,

555fa3545efe23393ff21fe0928aa3942e1b90ed is the first bad commit
commit 555fa3545efe23393ff21fe0928aa3942e1b90ed
Author: Roger Sayle <ro...@nextmovesoftware.com>
Date:   Thu Oct 7 15:42:09 2021 +0100

    Introduce smul_highpart and umul_highpart RTX for high-part multiplications

caused

FAIL: gcc.target/i386/sse2-mmx-paddsb-2.c scan-assembler-times movl[ 
\\t]+\\$-128, 1
FAIL: gcc.target/i386/sse2-mmx-paddusb-2.c scan-assembler-times movl[ 
\\t]+\\$-1, 1
FAIL: gcc.target/i386/sse2-mmx-psubsb-2.c scan-assembler-times movl[ 
\\t]+\\$-128, 1

with GCC configured with

../../gcc/configure 
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-4231/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/sse2-mmx-paddsb-2.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/sse2-mmx-paddusb-2.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/sse2-mmx-psubsb-2.c 
--target_board='unix{-m64\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me 
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