[PATCH] D121881: [RISCV][RVV] Select unmaksed TU RVV pseudos in a DAG post-process

[ShihPo Hung via Phabricator via llvm-commits]

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Following D118810 <https://reviews.llvm.org/D118810> that reduced the size of ISel table,
this patch optimizes allone-masked RVV pseudos with TU policy and swap them 
out to their unmasked TU pseudos.

It does not handle pseudos which have both TU policy and UNDEF merge operand at the same time.

The logic is covered by the strict fcvt intrinsics tests.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121881

Files:
  llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
  llvm/lib/Target/RISCV/RISCVISelDAGToDAG.h
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
  llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td

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