[PATCH] D52975: [TargetLowering][RISCV] Introduce getExtendForShiftAmount and implement for RISC-V

[Alex Bradbury via Phabricator via llvm-commits]

asb added a comment.

Thanks for the review, I was hoping there was an opportunity here to avoid the need for backend-specific peepholes. I'll handle in the backend instead. For my own edification, what do you mean by the shift amount being too large to undef?


https://reviews.llvm.org/D52975