[PATCH] D109394: [RISCV] Enable CGP to sink splat operands of Add/Sub/Mul.

[Craig Topper via Phabricator via llvm-commits]

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LICM may have pulled out a splat, but with .vx instructions we
can fold it into an operation.

This patch enables CGP to reverse the LICM transform and move the
splat back into the loop.

I've started with the commutable integer operations, but we can
extend this with more operations in future patches.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109394

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.h
  llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll

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