[all-commits] [llvm/llvm-project] 3ae712: [RISCV] Drop earlyclobber constraint from vwadd(u)...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3ae71226ef4963c01792e7679a21fd0fb61b40d6
      https://github.com/llvm/llvm-project/commit/3ae71226ef4963c01792e7679a21fd0fb61b40d6
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2021-04-11 (Sun, 11 Apr 2021)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
    M llvm/test/CodeGen/RISCV/rvv/vfwadd.w-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vfwadd.w-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/vfwsub.w-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vfwsub.w-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/vwadd.w-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vwadd.w-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/vwaddu.w-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vwaddu.w-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/vwsub.w-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vwsub.w-rv64.ll
    M llvm/test/CodeGen/RISCV/rvv/vwsubu.w-rv32.ll
    M llvm/test/CodeGen/RISCV/rvv/vwsubu.w-rv64.ll

  Log Message:
  -----------
  [RISCV] Drop earlyclobber constraint from vwadd(u).wx, vwsub(u).wx, vfwadd.wf and vfwsub.wf.

The first source has the same EEW as the destination and the other
source is a scalar so the overlap constraints don't apply to
the unmasked version.

For the masked version we have a constraint that the destination
can't be V0 so that covers the only overlap issue there.

Reviewed By: khchen

Differential Revision: https://reviews.llvm.org/D100217