| Issue |
124275
|
| Summary |
wrong code at -O1 and above on x86_64-linux-gnu
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
zhendongsu
|
It appears to be a recent regression from 19.1.0.
Compiler Explorer: https://godbolt.org/z/haMfGoo6h
```
[548] % clangtk -v
clang version 20.0.0git (https://github.com/llvm/llvm-project.git ddd2f57b29661f21308eec0400fa92a6d075b0c6)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /local/home/suz/suz-local/software/local/clang-trunk/bin
Build config: +assertions
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/12
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/12
Candidate multilib: .;@m64
Selected multilib: .;@m64
Found CUDA installation: /usr/local/cuda, version 12.1
[549] %
[549] % clangtk -O1 small.c
[550] % ./a.out
Aborted
[551] %
[551] % cat small.c
int printf(const char *, ...);
unsigned a;
int b, c = 1;
int main() {
int d;
a = -1;
if (a < 1)
goto e;
d = c;
if (d) {
e:;
}
if (!d)
__builtin_abort();
if (b)
goto e;
return 0;
}
```
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