[all-commits] [llvm/llvm-project] 1a7ac2: [RISCV] Add ISel support for RVV vector/scalar forms

[Fraser Cormack via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1a7ac29a89f8209dda6567a3d48594a618aa1621
      https://github.com/llvm/llvm-project/commit/1a7ac29a89f8209dda6567a3d48594a618aa1621
  Author: Fraser Cormack <fraser at codeplay.com>
  Date:   2020-12-23 (Wed, 23 Dec 2020)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.h
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
    A llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
    A llvm/test/CodeGen/RISCV/rvv/vadd-sdnode-rv32.ll
    A llvm/test/CodeGen/RISCV/rvv/vadd-sdnode-rv64.ll
    A llvm/test/CodeGen/RISCV/rvv/vor-sdnode-rv32.ll
    A llvm/test/CodeGen/RISCV/rvv/vor-sdnode-rv64.ll
    A llvm/test/CodeGen/RISCV/rvv/vshl-sdnode-rv32.ll
    A llvm/test/CodeGen/RISCV/rvv/vshl-sdnode-rv64.ll
    A llvm/test/CodeGen/RISCV/rvv/vsplats-i64.ll
    A llvm/test/CodeGen/RISCV/rvv/vsrl-sdnode-rv32.ll
    A llvm/test/CodeGen/RISCV/rvv/vsrl-sdnode-rv64.ll

  Log Message:
  -----------
  [RISCV] Add ISel support for RVV vector/scalar forms

This patch extends the SDNode ISel support for RVV from only the
vector/vector instructions to include the vector/scalar and
vector/immediate forms.

It uses splat_vector to carry the scalar in each case, except when
XLEN<SEW (RV32 SEW=64) when a custom node `SPLAT_VECTOR_I64` is used for
type-legalization and to encode the fact that the value is sign-extended
to SEW. When the scalar is a full 64-bit value we use a sequence to
materialize the constant into the vector register.

The non-intrinsic ISel patterns have also been split into their own
file.

Authored-by: Roger Ferrer Ibanez <rofirrim at gmail.com>
Co-Authored-by: Fraser Cormack <fraser at codeplay.com>

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D93312