| Issue |
76951
|
| Summary |
[clang] Missed optimization: clang doesn't skip not used evaluation
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
gyakh
|
Hello,
I recently found that clang doesn't optimize simple code.
Specifically, it won't remove computation of `x + 777*x/34` when `bool b` is false in this code (https://godbolt.org/z/fWssbGrer):
```
int f(bool b, int x) {
auto it = x + 777*x/34;
if (b && it != 7) {
return 1;
} else {
return 0;
}
}
```
In other function f1, it will first check `bool b` and only compute `x + 777*x/34` when it's true.
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