[Bug tree-optimization/121350] New: [16 regression] Segfault in aarch64.cc for SLP_TREE_MEMORY_ACCESS_TYPE since r16-2663-ga5aa73e547d738

[dhruvc at nvidia dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121350

            Bug ID: 121350
           Summary: [16 regression] Segfault in aarch64.cc for
                    SLP_TREE_MEMORY_ACCESS_TYPE since
                    r16-2663-ga5aa73e547d738
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dhruvc at nvidia dot com
  Target Milestone: ---

Previously, vect_mem_access_type would check if node was NULL or not. The
updated code with the revision does not. Min repro:

===
typedef struct {
  int a;
  short b
} c;
c *d;
int e;
void f(c *g) { g->a = g->b; }
void h() {
  c i;
  f(&i);
  for (; e; --e)
    *d++ = i;
}
===

Flags: -O3 -mcpu=neoverse-v2 -msve-vector-bits=128