| Issue |
108910
|
| Summary |
Loop gets vectorized when it can be folded to a constant
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
dcci
|
```
#include <stdint.h>
int64_t foo() {
int64_t result = 0;
for (int r = 0; r < 7; r++) {
for (int s = 0; s < 10; s++) {
for (int t = 0; t < 10; t++) {
if (t + s + r == 10) {
result += 1;
}
}
}
}
return result;
}
```
https://clang.godbolt.org/z/vfWGc1MWK
Changing the condition from `t + s + r` into `t + s` results in LLVM optimizing the code to just:
```
foo:
mov eax, 63
ret
```
cc: @fhahn
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