public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c++/114290] New: GCC output incorrect output with -O2
@ 2024-03-09  9:52 jlame646 at gmail dot com
  2024-03-09 18:34 ` [Bug ipa/114290] " i at rvalue dot moe
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: jlame646 at gmail dot com @ 2024-03-09  9:52 UTC (permalink / raw)
  To: gcc-bugs

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;
} 
```

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2024-03-09 21:04 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-03-09  9:52 [Bug c++/114290] New: GCC output incorrect output with -O2 jlame646 at gmail dot com
2024-03-09 18:34 ` [Bug ipa/114290] " i at rvalue dot moe
2024-03-09 18:39 ` [Bug ipa/114290] [11/12/13/14 regression] GCC output incorrect output with -O2 since r9-7460-g9f2cfe108f75de sjames at gcc dot gnu.org
2024-03-09 18:41 ` sjames at gcc dot gnu.org
2024-03-09 20:53 ` pinskia at gcc dot gnu.org
2024-03-09 21:04 ` pinskia at gcc dot gnu.org

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).