[PATCH] D75157: [DAGCombine] Perform the fold of A - (-B) -> A + B only when it is cheaper

[qshanz via Phabricator via llvm-commits]

steven.zhang abandoned this revision.
steven.zhang added a comment.

Seems that we indeed see some regression and 'add' has some benefit on the register pressure over sub as it is commutable. I will abandon this revision,  Thank you for all the comments.


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https://reviews.llvm.org/D75157