https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113065
--- Comment #1 from 陳履軒 <clh960524+gcc at gmail dot com> --- Here's the result after compiling: $ arm-linux-gnueabihf-gcc -mcpu=cortex-a32 -mfpu=crypto-neon-fp-armv8 -Wextra -Werror -Wall -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations test.c during RTL pass: expand test.c: In function ‘simde_vaddq_p128’: test.c:18:8: internal compiler error: in expand_shift_1, at expmed.c:2668 18 | mask = mask << 64; | ~~~~~^~~~~~~~~~~~ 0x7f9d29bf4d8f __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58 0x7f9d29bf4e3f __libc_start_main_impl ../csu/libc-start.c:392 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <file:///usr/share/doc/gcc-11/README.Bugs> for instructions.