https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118918
Bug ID: 118918
Summary: Miscompile at -Os
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: ---
This code triggers SIGFPE at -Os and prints 1 at -O0/1/2/3:
```c
int printf(const char *, ...);
int a, b;
int c(int d, int h) {
long *e;
int f;
if (h)
e = (long[]){2};
else
e = (long[]){2, 8};
f = 0;
for (;; f++) {
unsigned g = d / e[f];
if (g)
return f;
}
}
int i(int d, char *h) {
if (b - 7 + b)
return 1;
return d + h[0];
}
int j(char d) {
int k = c(-70, 2), l = i(k, &d);
a = 0;
return l;
}
int main() {
printf("%d", j(6));
}
```
Compiler Explorer: https://godbolt.org/z/3Tcjaq5Y6
It seems to start from gcc 10.2.
