[PATCH] D148519: [RISCV] Support vector strict rounding operations.

[Yeting Kuo via Phabricator via llvm-commits]

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The patch expands those strict opcodes by similar method to expand their base
opcodes. But unlike the implement of those base opcodes, to catch overflow
exceptions the patch does not inactive invalid input values and uses target
strict operations when coverting to integer.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D148519

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.h
  llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
  llvm/test/CodeGen/RISCV/rvv/fceil-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/ffloor-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fceil-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ffloor-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fnearbyint-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fround-costrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-froundeven-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ftrunc-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fnearbyint-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/fround-costrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/froundeven-constrained-sdnode.ll
  llvm/test/CodeGen/RISCV/rvv/ftrunc-constrained-sdnode.ll

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