[Bug tree-optimization/92677] New: [10 Regression] ICE in get_group_load_store_type, at tree-vect-stmts.c:2261 since r271704

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92677

            Bug ID: 92677
           Summary: [10 Regression] ICE in get_group_load_store_type, at
                    tree-vect-stmts.c:2261 since r271704
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: alejandro at gcc dot gnu.org
  Target Milestone: ---

Starting from the following revision I see:

$ cat vect.i
int a, c;
int *b;
long d;
double *e;

void fn1() {
  long f;
  double g, h;
  while (c) {
    if (d) {
      g = *e;
      *(b + 4) = g;
    }
    if (f) {
      h = *(e + 2);
      *(b + 6) = h;
    }
    e += a;
    b += 8;
    c--;
    d += 2;
  }
}

$ gcc vect.i -c -mavx2 -O3
during GIMPLE pass: vect
vect.i: In function ‘fn1’:
vect.i:6:6: internal compiler error: in get_group_load_store_type, at
tree-vect-stmts.c:2261
    6 | void fn1() {
      |      ^~~
0x7289ae get_group_load_store_type
        ../../gcc/tree-vect-stmts.c:2261
0x7289ae get_load_store_type
        ../../gcc/tree-vect-stmts.c:2475
0x1021b1a vectorizable_load
        ../../gcc/tree-vect-stmts.c:8717
0x1039905 vect_analyze_stmt(_stmt_vec_info*, bool*, _slp_tree*, _slp_instance*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
        ../../gcc/tree-vect-stmts.c:10846
0x1051ef3 vect_analyze_loop_operations
        ../../gcc/tree-vect-loop.c:1608
0x1051ef3 vect_analyze_loop_2
        ../../gcc/tree-vect-loop.c:2139
0x1051ef3 vect_analyze_loop(loop*, vec_info_shared*)
        ../../gcc/tree-vect-loop.c:2554
0x1070ed4 try_vectorize_loop_1
        ../../gcc/tree-vectorizer.c:892
0x10718d9 vectorize_loops()
        ../../gcc/tree-vectorizer.c:1125
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.