https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111389
Bug ID: 111389
Summary: ICE in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.cc:647
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: shaohua.li at inf dot ethz.ch
CC: hubicka at gcc dot gnu.org
Target Milestone: ---
gcc at -O2 crashes on the following testcase.
Bisected to r14-301-gf2d6beb7a4d
Compiler explorer: https://godbolt.org/z/o98qrd5nr
$cat a.c
int *a;
char b;
int d;
int e(int f) {
int c = 0;
for (; f > 1; c++)
f >>= 1;
return c;
}
void g() {
for (;;) {
for (; d; d++)
;
b = 0;
for (; e(92) - 6 + b; b = b + 8)
*a = 0;
}
}
int main() {}
$ gcc -O0 a.c && ./a.out
$ gcc -O2 a.c
during GIMPLE pass: ch_vect
a.c: In function ‘g’:
a.c:10:6: internal compiler error: in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.cc:645
10 | void g() {
| ^
0x7f8ffe5f1082 __libc_start_main
../csu/libc-start.c:308
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions
$
