Both clang and gcc do optimize it though - https://godbolt.org/z/cGG9dq756. You ...

		dzaima 10 days ago \| parent \| context \| favorite \| on: You can't fool the optimizer Both clang and gcc do optimize it though - https://godbolt.org/z/cGG9dq756. You need -fno-builtin or similar to get them to not.