https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123697

            Bug ID: 123697
           Summary: aarch64: ICE when unrolling at -msve-vector-bits=128
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: alfierichards at gcc dot gnu.org
  Target Milestone: ---

The following:

```c+++
struct a {
  double b() const;
  int c[2];
};
double a::b() const { return c[1]; }
a d[0];
double f;
void g() {
  for (int e = 0; e < 3; ++e)
    f += d[e].b();
}
```

ICE's for `gcc/xgcc -B gcc -march=armv9-a test.cc -mmax-vectorization
-msve-vector-bits=128 -O3`

With:

```
test.cc: In function ‘void g()’:
test.cc:8:6: error: non-trivial conversion in ‘vector_cst’
    8 | void g() {
      |      ^
const vector(4) int[2]
const vector(4) int
# .MEM_21 = VDEF <.MEM_60>
vect_array.19 = { 0, 0, 0, 0 };
```

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