[PATCH] D125552: [RISCV] Add llvm.read.register support for vlenb

[Philip Reames via Phabricator via llvm-commits]

reames added a comment.

For anyone curious on context, I wrote up a punchlist of potential optimizations following this here: https://github.com/preames/public-notes/blob/master/llvm-riscv-status.rst#optimizations-for-constant-physregs-vlenb-x0.  I'm going to know through a few of the easier ones.


Repository:
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