[PATCH] D106857: [RISCV] Teach VSETVLI insertion to merge the unused VSETVLI with the one need to be insert after it.

[Jianjian Guan via Phabricator via llvm-commits]

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If a vsetvli instruction is not compatible with the next vector instruction, and there is no other things that may update or use VL/VTYPE, we could merge it with the next vsetvli instruction that should be insert for the vector instruction.
This commit only merge VTYPE with the former vsetvli instruction which has the same VL.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106857

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

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