https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111336
Bug ID: 111336
Summary: Wrong code at -O2/3 since r14-2472-g14b10ff30ad
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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 -O2/3 produced the wrong code on the following testcase.
Bisected to r14-2472-g14b10ff30ad
Compiler explorer: https://godbolt.org/z/njdcv5aK8
$ cat a.c
int printf(const char *, ...);
int a, b;
long c = 3521733542;
int d[2];
int e(int f, int g) {
if (f == 0)
return 0;
if (f > 200)
return 0;
if (g)
return 5 * f;
return 0;
}
int main() {
int h = 0;
for (; e((int)c + 773233762, c + 60) + 773163185 + h < 2; h++)
d[h] = b;
printf("%X\n", a);
}
$
$ gcc -O0 a.c && ./a.out
0
$ gcc -O2 a.c && ./a.out
Segmentation fault
$
