[Bug tree-optimization/95356] New: [11 Regression] ICE in vect_get_constant_vectors, at tree-vect-slp.c:3635 since r11-564-g79f0451c67e8ed56

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95356

            Bug ID: 95356
           Summary: [11 Regression] ICE in vect_get_constant_vectors, at
                    tree-vect-slp.c:3635 since r11-564-g79f0451c67e8ed56
           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: ---

I see this:

$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/vshift-5.c -O3
-mavx512dq
during GIMPLE pass: slp
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/vshift-5.c: In function ‘f1’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/vshift-5.c:8:1: internal
compiler error: in vect_get_constant_vectors, at tree-vect-slp.c:3655
    8 | f1 (void)
      | ^~
0x767911 vect_get_constant_vectors
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:3655
0x10d1cba vect_get_slp_defs(vec_info*, _slp_tree*, vec<vec<tree_node*, va_heap,
vl_ptr>, va_heap, vl_ptr>*, unsigned int)
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:3887
0x108ba57 vect_get_vec_defs(vec_info*, tree_node*, tree_node*, _stmt_vec_info*,
vec<tree_node*, va_heap, vl_ptr>*, vec<tree_node*, va_heap, vl_ptr>*,
_slp_tree*)
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:1636
0x109124d vectorizable_shift
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:5900
0x10a855e vect_transform_stmt(vec_info*, _stmt_vec_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*)
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:11182
0x10cf7d8 vect_schedule_slp_instance
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:4235
0x10cf888 vect_schedule_slp_instance
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:4127
0x10d8812 vect_schedule_slp(vec_info*)
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:4359
0x10db80c vect_slp_bb_region
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:3318
0x10db80c vect_slp_bb(basic_block_def*)
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:3441
0x10dd1bf execute
        /home/marxin/Programming/gcc/gcc/tree-vectorizer.c:1320
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