| Issue |
126440
|
| Summary |
Failure to infer alignment of `malloc`
|
| Labels |
missed-optimization
|
| Assignees |
|
| Reporter |
Kmeakin
|
According to cppreference, `malloc` should always return pointers that are at least as aligned as `max_align_t`. So the alignment test should always be true. gcc optimises this but LLVM does not:
https://godbolt.org/z/GnbEfbseE
https://alive2.llvm.org/ce/z/QZign2
```c
bool src(void) {
void* p = malloc(1);
return ((uintptr_t)p % alignof(max_align_t)) == 0;
}
bool tgt(void) { return true; }
```
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