[Bug tree-optimization/97173] New: [11 Regression] ICE in vectorizable_live_operation, at tree-vect-loop.c:8324 since r11-3025-g095d42feed09f880

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97173

            Bug ID: 97173
           Summary: [11 Regression] ICE in vectorizable_live_operation, at
                    tree-vect-loop.c:8324 since r11-3025-g095d42feed09f880
           Product: gcc
           Version: 11.0
            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: rguenth at gcc dot gnu.org
  Target Milestone: ---

The following ICEs:

$ cat disk.i
typedef struct {
  char *track;
  char *clocks;
  char *fm;
  char *weak;  
} disk_t;

disk_t disk_update_tlens_d;
int disk_update_tlens_d_0;

void disk_update_tlens() {
  disk_update_tlens_d.track = disk_update_tlens_d.clocks =
      disk_update_tlens_d.track + disk_update_tlens_d_0;
  disk_update_tlens_d.fm = disk_update_tlens_d.clocks + disk_update_tlens_d_0;
  disk_update_tlens_d.weak = disk_update_tlens_d.fm;
  disk_update_tlens_d.track[2] = 5;
}

$ gcc disk.i -c -O3
during GIMPLE pass: slp
disk.i: In function ‘disk_update_tlens’:
disk.i:11:6: internal compiler error: in vectorizable_live_operation, at
tree-vect-loop.c:8348
   11 | void disk_update_tlens() {
      |      ^~~~~~~~~~~~~~~~~
0x729e91 vectorizable_live_operation(vec_info*, _stmt_vec_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*, int, bool,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
        /home/marxin/Programming/gcc/gcc/tree-vect-loop.c:8348
0xfd1217 can_vectorize_live_stmts
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:10531
0xff6878 vect_transform_stmt(vec_info*, _stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:10909
0x1022d69 vect_schedule_slp_instance
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:4717
0x1022d86 vect_schedule_slp_instance
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:4583
0x102bee1 vect_schedule_slp(vec_info*, vec<_slp_instance*, va_heap, vl_ptr>)
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:4840
0x102d448 vect_slp_region
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:3676
0x102d448 vect_slp_bb(basic_block_def*)
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:3793
0x102fa6f execute
        /home/marxin/Programming/gcc/gcc/tree-vectorizer.c:1433
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