[Bug rtl-optimization/63491] Ice in LRA with simple vector test case on power

[bergner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63491

--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
Slightly simplified test case that still fails without a function call:

typedef __int128_t __attribute__((__vector_size__(16))) vector_128_t;
typedef unsigned long long scalar_64_t;

vector_128_t
foo (void)
{
  union {
    scalar_64_t i64[2];
    vector_128_t v128;
  } u;
  u.i64[0] = 1;
  u.i64[1] = 2;
  return u.v128;
}