[PATCH] D159368: [WIP][RISCV] Remove SEW operand for SEW-aware pseudos

[Wang Pengcheng via Phabricator via llvm-commits]

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We can remove the SEW operand and get the SEW value
by searching `RISCVVPseudosTable` (or encoding it in
TSFlags by using 2 bits).

The MatcherTable in `RISCVGenDAGISel` and generated
`RISCVGenInstrInfo` have some reductions. But it will
also add some complexities and make the RVV pseudos
inconsistent.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D159368

Files:
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
  llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
  llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
  llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
  llvm/test/CodeGen/RISCV/rvv/rvv-peephole-vmerge-vops.ll
  llvm/test/CodeGen/RISCV/rvv/vsetvli-insert-crossbb.mir
  llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.mir

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