Craig Topper bd261ecc5a [SelectionDAG] Add SDNode::user_begin() and use it in some places (#120509) ...

Most of these are just places that want the first user and aren't
iterating over the whole list.

While there I changed some use_size() == 1 to hasOneUse() which
is more efficient.

This is part of an effort to rename use_iterator to user_iterator
and provide a use_iterator that dereferences to SDUse&. This patch
helps reduce the diff on later patches.

2024-12-18 22:13:04 -08:00

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