https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117543
Bug ID: 117543
Summary: Miscompile with -O1 and -O0/2/3
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 -O1, it triggered SIGFPE. With -O0/2/3, it
returned 0:
```c
int printf(const char *, ...);
int a, b = 422;
char c;
char(d)(unsigned char e, unsigned char f) { return e / f; }
short(i)(short e, short f) { return e - f; }
int j() {
int g, h = 0;
for (; h < 1; ++h)
g = h;
return g;
}
int main() {
int k;
short l = i(~0, b);
k = j();
c = d(l, k + 1);
printf("%X\n", a);
}
```
Details can be found here: https://godbolt.org/z/zhM5P41er
I have checked with the recent problematic commit. It works fine on that.
