https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89934
Bug ID: 89934
Summary: [9 Regression] ICE in tree_fits_uhwi_p, at tree.c:7237
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Changed between 20190210 and 20190217, at -O[s123].
(gcc-8 needs -Wall, and changed behavior before 20180525)
$ cat z1.c
char *strncpy();
void foo (char *a)
{
strncpy (a, a);
}
$ gcc-9-20190331 -c z1.c -O2
z1.c: In function 'foo':
z1.c:4:3: warning: too few arguments to built-in function 'strncpy' expecting 3
[-Wbuiltin-declaration-mismatch]
4 | strncpy (a, a);
| ^~~~~~~
z1.c:1:7: note: declared here
1 | char *strncpy();
| ^~~~~~~
during GIMPLE pass: wrestrict
z1.c:2:6: internal compiler error: Segmentation fault
2 | void foo (char *a)
| ^~~
0xa748df crash_signal
../../gcc/toplev.c:326
0xca6a37 tree_fits_uhwi_p(tree_node const*)
../../gcc/tree.c:7237
0x6aecbc get_size_range(tree_node*, tree_node**, bool)
../../gcc/calls.c:1238
0x83ca3e builtin_access
../../gcc/gimple-ssa-warn-restrict.c:735
0x83d39f check_bounds_or_overlap(gimple*, tree_node*, tree_node*, tree_node*,
tree_node*, bool, bool)
../../gcc/gimple-ssa-warn-restrict.c:1933
0x83f7f0 check_call
../../gcc/gimple-ssa-warn-restrict.c:1904
0x83f7f0 before_dom_children
../../gcc/gimple-ssa-warn-restrict.c:105
0x1164c54 dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:353
0x835aa7 execute
../../gcc/gimple-ssa-warn-restrict.c:119
