[PATCH] D71657: [SDAG] Handle BUILD_PAIR in ComputeNumSignBits

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

And the other problem is that the sign bits information of the originating basic block is calculated between the last DAG combine and isel, so all the producing instructions have already been split.


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  https://reviews.llvm.org/D71657/new/

https://reviews.llvm.org/D71657