[Bug tree-optimization/92317] New: [10 Regression] ICE in slpeel_duplicate_current_defs_from_edges, at tree-vect-loop-manip.c:960 since r277569

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92317

            Bug ID: 92317
           Summary: [10 Regression] ICE in
                    slpeel_duplicate_current_defs_from_edges, at
                    tree-vect-loop-manip.c:960 since r277569
           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: avieira at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: aarch64-linux-gnu

Using aarch64 cross compiler one can see:

$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr87967.C
-O2 -fno-tree-pre -c -ftree-vectorize --param vect-epilogues-nomask=1
during GIMPLE pass: vect
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr87967.C: In function
‘void fn3()’:
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/opt/pr87967.C:30:6: internal
compiler error: in slpeel_duplicate_current_defs_from_edges, at
tree-vect-loop-manip.c:960
   30 | void fn3() {
      |      ^~~
0x173a226 slpeel_duplicate_current_defs_from_edges
        ../../gcc/tree-vect-loop-manip.c:960
0x173a68c slpeel_tree_duplicate_loop_to_edge_cfg(loop*, loop*, edge_def*)
        ../../gcc/tree-vect-loop-manip.c:1056
0x173f085 vect_do_peeling(_loop_vec_info*, tree_node*, tree_node*, tree_node**,
tree_node**, tree_node**, int, bool, bool, tree_node**,
auto_vec<std::pair<data_reference*, tree_node*>, 0ul>&)
        ../../gcc/tree-vect-loop-manip.c:2674
0x172f50a vect_transform_loop(_loop_vec_info*)
        ../../gcc/tree-vect-loop.c:8273
0x17596a5 try_vectorize_loop_1
        ../../gcc/tree-vectorizer.c:990
0x175989b try_vectorize_loop_1
        ../../gcc/tree-vectorizer.c:1027
0x1759967 try_vectorize_loop
        ../../gcc/tree-vectorizer.c:1045
0x1759b40 vectorize_loops()
        ../../gcc/tree-vectorizer.c:1127
0x15d7b3d execute
        ../../gcc/tree-ssa-loop.c:414