[Bug debug/104778] [12 Regression] ICE in simplify_subreg, at simplify-rtx.cc:7324

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104778

--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
Created attachment 52586
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52586&action=edit
powerpc-e300c3-linux-gnu-gcc-12.0.1 -mcmpb -Og -g -c k1n69laf.c -Q
--help=target

It still ICEs for we w/ 20220306 snapshot.

  1. It does not ICE w/ -m64.

  2. It does not ICE when I add either -fPIC or -fno-PIC, likewise for -fpic
and -fno-pic.

  3. It ICEs if I replace -mcpu=a2 w/ -mcmpb (i.e.
powerpc-e300c3-linux-gnu-gcc-12.0.1 -mcmpb -Og -g -c poy2oawm.c).

% powerpc-e300c3-linux-gnu-gcc-12.0.1 -v
Using built-in specs.
COLLECT_GCC=powerpc-e300c3-linux-gnu-gcc-12.0.1
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/powerpc-e300c3-linux-gnu/12.0.1/lto-wrapper
Target: powerpc-e300c3-linux-gnu
Configured with:
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.1_p20220306/work/gcc-12-20220306/configure
--host=x86_64-pc-linux-gnu --target=powerpc-e300c3-linux-gnu
--build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/powerpc-e300c3-linux-gnu/gcc-bin/12.0.1
--includedir=/usr/lib/gcc/powerpc-e300c3-linux-gnu/12.0.1/include
--datadir=/usr/share/gcc-data/powerpc-e300c3-linux-gnu/12.0.1
--mandir=/usr/share/gcc-data/powerpc-e300c3-linux-gnu/12.0.1/man
--infodir=/usr/share/gcc-data/powerpc-e300c3-linux-gnu/12.0.1/info
--with-gxx-include-dir=/usr/lib/gcc/powerpc-e300c3-linux-gnu/12.0.1/include/g++-v12
--with-python-dir=/share/gcc-data/powerpc-e300c3-linux-gnu/12.0.1/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --disable-nls
--disable-libunwind-exceptions --enable-checking=yes --disable-esp
--enable-libstdcxx-time --disable-libstdcxx-pch
--enable-poison-system-directories --with-sysroot=/usr/powerpc-e300c3-linux-gnu
--disable-bootstrap --enable-__cxa_atexit --enable-clocale=gnu
--disable-multilib --disable-fixed-point --enable-targets=all --enable-libgomp
--disable-libssp --disable-libada --disable-cet --disable-systemtap
--enable-valgrind-annotations --disable-vtable-verify --disable-libvtv
--without-zstd --enable-lto --with-isl --disable-isl-version-check
--disable-libsanitizer --enable-default-pie --enable-default-ssp
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.1 20220306 (experimental) (GCC)