https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117522
Bug ID: 117522
Summary: Miscompile with -O3 and -O0/1/2
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: yunboni at smail dot nju.edu.cn
Target Milestone: ---
When I compiled this code with -O3, it triggered SIGSEGV. With -O0/1/2, it
outputs 0:
```c
int printf(const char *, ...);
int a, b = 4095;
int c[6];
const short d = -2;
void e(char f) { b = c[(b ^ f) & 255]; }
int main() {
e(d >> 8);
printf("%X\n", a);
}
```
Details can be found here: https://godbolt.org/z/fr8s9j6a9
