https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122131
--- Comment #4 from Christopher Fore <csfore at posteo dot net> ---
Bisected it to r16-2482-g83afbe552e6b0b using the following script:
```
#!/bin/bash
if [ -d "./build" ]; then
echo "Removing old build..."
rm -rf ./build
fi
mkdir build
cd build
../configure --host=x86_64-pc-linux-gnu --target=powerpc-unknown-linux-gnu
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/powerpc-unknown-linux-gnu/gcc-bin/16
--includedir=/usr/lib/gcc/powerpc-unknown-linux-gnu/16/include
--datadir=/usr/share/gcc-data/powerpc-unknown-linux-gnu/16
--mandir=/usr/share/gcc-data/powerpc-unknown-linux-gnu/16/man
--infodir=/usr/share/gcc-data/powerpc-unknown-linux-gnu/16/info
--with-gxx-include-dir=/usr/lib/gcc/powerpc-unknown-linux-gnu/16/include/g++-v16
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/powerpc-unknown-linux-gnu/16/python
--enable-languages=c --enable-obsolete --enable-secureplt --disable-werror
--without-included-gettext --disable-libunwind-exceptions
--enable-checking=yes,extra --with-gcc-major-version-only
--disable-libstdcxx-time --disable-lto --disable-libstdcxx-pch
--enable-poison-system-directories
--with-sysroot=/usr/powerpc-unknown-linux-gnu --disable-gcov
--disable-bootstrap --enable-clocale=gnu --disable-multilib
--disable-fixed-point --enable-targets=all --disable-libgomp --disable-libssp
--disable-libada --disable-systemtap --disable-valgrind-annotations
--disable-vtable-verify --disable-libvtv --without-zstd --without-isl
--disable-libsanitizer --enable-default-pie --enable-host-pie
--disable-host-bind-now --enable-default-ssp --disable-fixincludes
--with-gxx-libcxx-include-dir=/usr/include/c++/v1
make -j24
cd ..
./build/gcc/cc1 -O2 -maltivec ../reduced.i > /tmp/gcc-out 2>&1
grep "during GIMPLE pass: vect" /tmp/gcc-out && exit 1 || exit 0
```
