[SelectionDAGBuilder] Use address width when lowering ptrtoaddr#139423

arichardson wants to merge 4 commits intousers/arichardson/spr/main.selectiondagbuilder-use-address-width-when-lowering-ptrtoaddrllvm/llvm-project:users/arichardson/spr/main.selectiondagbuilder-use-address-width-when-lowering-ptrtoaddrfrom

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