[Bug target/79904] ICE in annotate_constant_pool_refs, at config/s390/s390.c:7909

[vogt at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79904

--- Comment #2 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
Reduced test:

--
typedef signed char V __attribute__((vector_size (8))); 
void foo (V *a) 
{ 
  *a = *a * 3; 
}
--

$ gcc -fsanitize=undefined ...