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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/101242] Segfault in SLP vectorizor after
 2ad71efb5de
Date: Mon, 28 Jun 2021 13:32:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101242

--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
For the reference, this is the backtrace:

mjambor@virgil:/tmp/bbb$ ~/gcc/trunk/inst/bin/gcc -S -Ofast test.i=20
during GIMPLE pass: slp
test.i: In function =E2=80=98check_su3=E2=80=99:
test.i:11:5: internal compiler error: Segmentation fault
   11 | int check_su3() {
      |     ^~~~~~~~~
0x12ad5a0 crash_signal
        /home/mjambor/gcc/trunk/src/gcc/toplev.c:327
0x162643d vec<_stmt_vec_info*, va_heap, vl_embed>::iterate(unsigned int,
_stmt_vec_info**) const
        /home/mjambor/gcc/trunk/src/gcc/vec.h:932
0x1625168 vec<_stmt_vec_info*, va_heap, vl_ptr>::iterate(unsigned int,
_stmt_vec_info**) const
        /home/mjambor/gcc/trunk/src/gcc/vec.h:1698
0x166d14d vect_optimize_slp(vec_info*)
        /home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:3992
0x1672d1e vect_slp_analyze_bb_1
        /home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:5621
0x1673111 vect_slp_region
        /home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:5708
0x1673bba vect_slp_bbs
        /home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:5858
0x1674063 vect_slp_function(function*)
        /home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:5944
0x168f92b execute
        /home/mjambor/gcc/trunk/src/gcc/tree-vectorizer.c:1445
Please submit a full bug report...=