| Issue |
131465
|
| Summary |
[clang] Miscompilation at -O2/3
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
cardigan1008
|
This code prints 80 at `-O2/3` and 0 at `-O0/1`:
```c
int printf(const char *, ...);
int a, b;
void c(char d) { a = d; }
int main() {
int e = 82, f = 20;
for (; 85 + 20 + e - 187 + f; f = 65535 + 20 + e - 65637)
if (b)
e++;
c(e >> 24);
printf("%X\n", a);
}
```
Compiler Explorer: https://godbolt.org/z/6WP1aT6ba
Bisected to https://github.com/llvm/llvm-project/commit/04cd06906288dcb148de37d7c3e6c009c3e3b726, which was committed by @preames
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