[PATCH] D91512: [AArch64][Isel] Avoid implicit zext for SIGN_EXTEND_INREG (TRUNCATE)

[JinGu Kang via Phabricator via llvm-commits]

jaykang10 added a comment.

I wonder we can extend this check to other basic blocks.

For example, if the `trunc` is in other basic block, there could be `CopyFromReg` instead of `trunc` in current basic block. Can we detect the `trunc` in this case please?


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  https://reviews.llvm.org/D91512/new/

https://reviews.llvm.org/D91512