| Issue |
129244
|
| Summary |
[clang] Miscompile at -O2/3
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
cardigan1008
|
This code prints 0 at `-O0/1` and returns 3 at `-O2/3`:
```c
int printf(const char *, ...);
int a, b, d;
void exit(int);
int c(int e, unsigned long p2) {
double g = -p2 / 1000000.0;
if (g > 3)
g = 3;
int f = e * 10 + g;
return f;
}
int h(int *e) {
if (0 >= d)
return 0;
return e[0];
}
int i(int e) {
int j = h(&e);
return c(67, j + 2) - 673 + j;
}
void k(int e, int p2) {
int l = e - p2;
if (1 != l)
exit(3);
}
int main() {
int m = i(9), q = i(5);
b = m;
k(5, q + 4);
printf("%X\n", a);
}
```
Compiler Explorer: https://godbolt.org/z/1bvrehz5j
Bisected to https://github.com/llvm/llvm-project/commit/42cbceb0f0160d67145723613fda325dbd129308, which was committed by @alexey-bataev
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