https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84526
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
One more test-case with a bit different BT:
$ cat sis.i
typedef struct
{
int a;
char b[10];
} c;
c d;
unsigned long s;
void e (void) { __builtin_strncpy (d.b, (char*)&d, s); }
$ gcc -O2 sis.i -Wall
during GIMPLE pass: strlen
sis.i: In function ‘e’:
sis.i:8:6: internal compiler error: Segmentation fault
void e (void) { __builtin_strncpy (d.b, (char*)&d, s); }
^
0xfdd6a9 crash_signal
../../gcc/toplev.c:325
0xc33483 generic_overlap
../../gcc/gimple-ssa-warn-restrict.c:927
0xc3486b strcpy_overlap
../../gcc/gimple-ssa-warn-restrict.c:1178
0xc354f6 overlap
../../gcc/gimple-ssa-warn-restrict.c:1304
0xc355db maybe_diag_overlap
../../gcc/gimple-ssa-warn-restrict.c:1325
0xc37792 check_bounds_or_overlap(gcall*, tree_node*, tree_node*, tree_node*,
tree_node*, bool)
../../gcc/gimple-ssa-warn-restrict.c:1889
0x126022b handle_builtin_stxncpy
../../gcc/tree-ssa-strlen.c:2067
0x12638f8 strlen_check_and_optimize_stmt
../../gcc/tree-ssa-strlen.c:3143
0x1264f2f strlen_dom_walker::before_dom_children(basic_block_def*)
../../gcc/tree-ssa-strlen.c:3476
0x1b14bc7 dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:353
0x12651c0 execute
../../gcc/tree-ssa-strlen.c:3556
