Yeting Kuo 1cc02b05b7 [SelectionDAG] Add helper function to check whether a SDValue is neutral element. NFC.
Using this helper makes work about neutral elements more easier. Although I only
find one case now, I think it will have more chance to be used since so many
combine works are related to neutral elements.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D133866
2022-09-30 11:29:11 +08:00
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2022-08-24 22:41:38 +00:00