[PATCH] D93767: [RISCV] Legalize select when Zbt extension available

[Michael Munday via Phabricator via llvm-commits]

mundaym created this revision.
Herald added subscribers: frasercrmck, NickHung, evandro, luismarques, apazos, sameer.abuasal, pzheng, s.egerton, lenary, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, asb, hiraditya.
mundaym requested review of this revision.
Herald added subscribers: llvm-commits, MaskRay.
Herald added a project: LLVM.

The custom expansion of select operations in the RISC-V backend
interferes with the matching of cmov instructions. Legalizing
select when the Zbt extension is available solves that problem.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D93767

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/rv32Zbs.ll
  llvm/test/CodeGen/RISCV/rv32Zbt.ll
  llvm/test/CodeGen/RISCV/rv64Zbt.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D93767.313564.patch
Type: text/x-patch
Size: 43096 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20201223/b666ec9d/attachment.bin>