[all-commits] [llvm/llvm-project] a4b45c: [RISCV] Allow fractional LMUL for reduction start ...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4b45c28a1255c27a5228363e6a94e0dde86ecca
      https://github.com/llvm/llvm-project/commit/a4b45c28a1255c27a5228363e6a94e0dde86ecca
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2022-12-12 (Mon, 12 Dec 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-fp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-fp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-fp-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-fp-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-int-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vreductions-int.ll

  Log Message:
  -----------
  [RISCV] Allow fractional LMUL for reduction start value

For reductions, we need to put the start value into a source vector. For fractional LMULs, we can perform the operation at the original LMUL.  For LMUL > 1, we eventually want to use a scalar insert, but that's outside the scope of this patch.

Differential Revision: https://reviews.llvm.org/D139747