[PATCH] D125270: [riscv] Remove mutation of prior vsetvli from insertion dataflow

[Philip Reames via Phabricator via llvm-commits]

reames updated this revision to Diff 428685.
reames added a comment.

Rebase after two predecessor patches.

Note that commit comment is now stale.  Posting this mostly as a WIP.  The opt quality result here is unconvincing, I want to play with a few other variants before deciding whether to bother with this at all.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125270/new/

https://reviews.llvm.org/D125270

Files:
  llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
  llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.ll

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