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e011dd47ee
Implement some more checks in `ptr_guaranteed_cmp`. * Pointers with different residues modulo their allocations' least common alignment are never equal. * Pointers to the same static allocation are equal if and only if they have the same offset. * Pointers to different non-zero-sized static allocations are unequal if both point within their allocation, and not on opposite ends. Tracking issue for `const_raw_ptr_comparison`: <https://github.com/rust-lang/rust/issues/53020> This should not affect `is_null`, the only usage of this intrinsic on stable. Closes https://github.com/rust-lang/rust/issues/144584