[Bug middle-end/126701] [16/17 Regression] ICE at -O2 on aarch64 during RTL pass: expand

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126701

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
To answer myself, I can reproduce the ICE this testcase on 16 branch with a
x86_64-linux to aarch64-linux cross (just removed stdint.h include and replaced
uint64_t with unsigned long and uint8_t with unsigned char):
./cc1 -quiet -nostdinc -O2 pr126701.c -march=armv9-a+sve -fchecking=1
during RTL pass: expand
pr126701.c: In function ‘f30’:
pr126701.c:8:6: internal compiler error: in verify_partition_mem_exprs, at
cfgexpand.cc:2484
    8 | void f30(unsigned long a0, _Bool a1, v16u64 a2)
      |      ^~~
0x1bcfc0d internal_error(char const*, ...)
        ../../gcc/diagnostic-global-context.cc:787
0x4429d9 fancy_abort(char const*, int, char const*)
        ../../gcc/diagnostics/context.cc:1813
0x5d28bb verify_partition_mem_exprs
        ../../gcc/cfgexpand.cc:2484
0x5e0c14 execute
        ../../gcc/cfgexpand.cc:7199
and I can reproduce it also if I revert on the branch the r16-9426 and r16-9425
commits (but keep the r16-9427).
So, the sharing problem was there already before (or the verification commit
has issues).  Thus I'd say the right fix for 16.2 is to revert r16-9427.