| Issue |
60944
|
| Summary |
wrong code at -O2 on x86_64-linux_gnu
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
zhendongsu
|
This is a regression from 13.0.*.
Compiler Explorer: https://godbolt.org/z/9r1o5v5eq
```
[522] % clangtk -v
clang version 17.0.0 (https://github.com/llvm/llvm-project.git 1b9b4f3bfa8bc7ed7dddd30dd30a07676891bedb)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/suz-local/opfuzz/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Candidate multilib: .;@m64
Selected multilib: .;@m64
[523] %
[523] % clangtk -O2 small.c
[524] % ./a.out
Floating point exception
[525] %
[525] % cat small.c
short a, b, *c = &b;
unsigned d = 4294967295U;
int e() {
while (1) {
while (d <= 1 && b <= d)
*c = 1;
int f = d;
d = a / f;
if (f < 4294967295U)
continue;
return 1;
}
}
int main() {
e();
return 0;
}
```
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