Detect use-after-move

[usx95]

#include <iostream>
#include <memory>

struct A {
    std::string data;
};

std::unique_ptr<A> bar();

void take(std::unique_ptr<A> in);

int main() {
    std::unique_ptr<A> a = bar();
    A* pointer = a.get();
    take(std::move(a));
    std::cout << pointer->data; // use-after-move!
}

https://godbolt.org/z/sbdGGqKEx
More examples: https://godbolt.org/z/8WKsMEodo

[llvmbot]

@llvm/issue-subscribers-clang-temporal-safety

Author: Utkarsh Saxena (usx95)

```cpp #include <iostream> #include <memory>

struct A {
std::string data;
};

std::unique_ptr<A> bar();

void take(std::unique_ptr<A> in);

int main() {
std::unique_ptr<A> a = bar();
A* pointer = a.get();
take(std::move(a));
std::cout << pointer->data; // use-after-move!
}

https://godbolt.org/z/sbdGGqKEx
</details>

[kashika0112]

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