[Bug c++/114290] New: GCC output incorrect output with -O2

["jlame646 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114290

            Bug ID: 114290
           Summary: GCC output incorrect output with -O2
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jlame646 at gmail dot com
  Target Milestone: ---

The following program gives wrong output `0` with `-O2` for input `2`. When
`f(1,1)` is commented out(or removed) it produces correct output.
https://godbolt.org/z/3rxah7Grx

```
#include <cstdio>
#include <iostream>
struct Node {
    int x;
};
Node f(int A, int B) {
    if (A < 0) return {0};
    return {A / B + (A % B != 0)};
}
Node g(int C, int D) {
    if (C > 0) return {0};
    return {C / D + (C % D != 0)};
}
int main() {
    int n;

    std::cin >> n;
    f(1, 1); //commenting this line fixes the issue
    Node t = g(-1, n);

    std::cout << t.x;
} 
```