[PATCH] D103331: [RISCV] Masked compares should use a tail agnostic policy.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: frasercrmck, evandro, HsiangKai, khchen, arcbbb, rogfer01.
Herald added subscribers: StephenFan, vkmr, luismarques, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, hiraditya.
craig.topper requested review of this revision.
Herald added a subscriber: MaskRay.
Herald added a project: LLVM.

Writes of a mask result are always tail agnostic.

Unfortunately, this seems to have made codegen worse. I can only
think this must be because the vsetvli was acting as some sort
of barrier that prevented some code movement in the scheduler.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103331

Files:
  llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
  llvm/test/CodeGen/RISCV/rvv/vmfeq-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmfeq-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmfge-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmfge-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmfgt-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmfgt-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmfle-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmfle-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmflt-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmflt-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmfne-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmfne-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmseq-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmseq-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsge-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsge-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsgt-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsgt-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsgtu-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsgtu-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsle-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsle-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsleu-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsleu-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmslt-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmslt-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsltu-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsltu-rv64.ll
  llvm/test/CodeGen/RISCV/rvv/vmsne-rv32.ll
  llvm/test/CodeGen/RISCV/rvv/vmsne-rv64.ll