https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118963
Bug ID: 118963
Summary: Miscompile at -O2/3
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: ---
This code times out at -O2/3 and prints 0 at -O0/1/s:
```c
int printf(const char *, ...);
int a = -104, b, c, e;
void g(int h) {
int f = 0;
while (!f + a - -104) {
f = h == 0;
if (f)
h = 1;
}
}
int main() {
int d = 8;
for (; e;)
d = 0;
c = d;
g(81 - 81);
printf("%X\n", b);
}
```
Compiler Explorer: https://godbolt.org/z/q3WajnYPj
Bisected to
https://github.com/gcc-mirror/gcc/commit/429a7a88438cc80e7c58d9f63d44838089899b12
