https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103099
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) l
1392 gimple *stmt = gsi_stmt (gsi);
1393 bool remove = false;
1394 if (gimple_clobber_p (stmt) || is_gimple_debug (stmt))
1395 FOR_EACH_SSA_TREE_OPERAND (op, stmt, iter, SSA_OP_USE)
1396 {
1397 basic_block bb = gimple_bb (SSA_NAME_DEF_STMT (op));
1398 if (op != retval
1399 && bb
1400 && bb != return_bb
1401 && bitmap_bit_p (split_point->split_bbs,
bb->index))
(gdb) p debug_gimple_stmt (stmt)
# DEBUG D#1 => &D#2->D.2395
$1 = void
there's no SSA use in this stmt. Sth forgets to update_stmt or somehow
replaces a non-debug with a debug one in-place. Huh.
