[PATCH] D67348: [RISCV] Add codegen pattern matching for bit manipulation assembly instructions.

[Paolo Savini via Phabricator via llvm-commits]

PaoloS created this revision.
PaoloS added reviewers: asb, simoncook, lewis-revill, edward-jones.
Herald added subscribers: llvm-commits, pzheng, s.egerton, lenary, Jim, benna, psnobl, jocewei, PkmX, rkruppe, the_o, brucehoult, MartinMosbeck, rogfer01, zzheng, MaskRay, shiva0217, kito-cheng, niosHD, sabuasal, apazos, johnrusso, rbar, hiraditya.
Herald added a project: LLVM.

This patch provides optimization of single block bit manipulation operations by enabling the +b target feature.
The matching patterns are reduced to equivalent single assembly bit manipulation instructions.


https://reviews.llvm.org/D67348

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfoB.td
  llvm/test/CodeGen/RISCV/rv32Zbb.ll
  llvm/test/CodeGen/RISCV/rv32Zbbp.ll
  llvm/test/CodeGen/RISCV/rv32Zbf.ll
  llvm/test/CodeGen/RISCV/rv32Zbp.ll
  llvm/test/CodeGen/RISCV/rv32Zbs.ll
  llvm/test/CodeGen/RISCV/rv32Zbt.ll
  llvm/test/CodeGen/RISCV/rv64Zbb.ll
  llvm/test/CodeGen/RISCV/rv64Zbbp.ll
  llvm/test/CodeGen/RISCV/rv64Zbf.ll
  llvm/test/CodeGen/RISCV/rv64Zbp.ll
  llvm/test/CodeGen/RISCV/rv64Zbs.ll
  llvm/test/CodeGen/RISCV/rv64Zbt.ll

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