[PATCH] D119654: [SDAG] enable binop identity constant folds for add/sub

[Simon Pilgrim via Phabricator via llvm-commits]

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@LuoYuanke Please can you rebase and add test coverage for 'add+select' to vector-bo-select.ll? I've updated some of the intrinsic tests to avoid the issue so these shouldn't show up any more, I'll finish this cleanup when I have a free moment.


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https://reviews.llvm.org/D119654