https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115397
--- Comment #1 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Debug build of the compiler is slightly more informative:
$ gcc -std=c99 -O3 -mavx512f -c bug.c.c -m32 -fPIC -fchecking=2
during RTL pass: split1
bug.c.c: In function 'LONG_divide_AVX512F':
bug.c.c:14:1: internal compiler error: RTL flag check: CONSTANT_POOL_ADDRESS_P
used with unexpected rtx code 'plus' in get_pool_constant, at varasm.cc:4046
14 | }
| ^
0x806828 rtl_check_failed_flag(char const*, rtx_def const*, char const*, int,
char const*)
../../source/gcc/rtl.cc:853
0x88fa27 get_pool_constant(rtx_def const*)
../../source/gcc/varasm.cc:4046
0x15e2829 ix86_broadcast_from_constant(machine_mode, rtx_def*)
../../source/gcc/config/i386/i386-expand.cc:612
0x16061be ix86_expand_ternlog(machine_mode, rtx_def*, rtx_def*, rtx_def*, int,
rtx_def*)
../../source/gcc/config/i386/i386-expand.cc:26045
0x1cddbd5 gen_split_1548(rtx_insn*, rtx_def**)
../../source/gcc/config/i386/sse.md:13050
0x20fa245 split_75
../../source/gcc/config/i386/sse.md:13044
0x20fa245 split_79
../../source/gcc/config/i386/sse.md:14592
0xc220eb try_split(rtx_def*, rtx_insn*, int)
../../source/gcc/emit-rtl.cc:3941
0x100f217 split_insn
../../source/gcc/recog.cc:3405
0x1015077 split_all_insns()
../../source/gcc/recog.cc:3509
0x1015128 execute
../../source/gcc/recog.cc:4433
