[all-commits] [llvm/llvm-project] dbc681: [VP][RISCV] Add vp.roundtozero and its RISC-V support

[Yueh-Ting (eop) Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dbc681c98e14d495618ec42975e9f793d3a7a0b7
      https://github.com/llvm/llvm-project/commit/dbc681c98e14d495618ec42975e9f793d3a7a0b7
  Author: eopXD <yueh.ting.chen at gmail.com>
  Date:   2022-10-07 (Fri, 07 Oct 2022)

  Changed paths:
    M llvm/docs/LangRef.rst
    M llvm/include/llvm/IR/Intrinsics.td
    M llvm/include/llvm/IR/VPIntrinsics.def
    M llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    A llvm/test/CodeGen/RISCV/rvv/fixed-vectors-roundtozero-vp.ll
    A llvm/test/CodeGen/RISCV/rvv/roundtozero-vp.ll
    M llvm/unittests/IR/VPIntrinsicTest.cpp

  Log Message:
  -----------
  [VP][RISCV] Add vp.roundtozero and its RISC-V support

The scalar instruction of this is `llvm.trunc`. However the naming of
ISD::VP_TRUNC is already taken by `trunc` of the LLVM IR. Naming this as
`vp.ftrunc` would likely cause confusion with `vp.fptrunc`. So adding
`vp.roundtozero` that will look similar to `vp.roundeven`.

Reviewed By: frasercrmck

Differential Revision: https://reviews.llvm.org/D135233