[PATCH] D146270: [RISCV] Use LBU for extloadi8.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: reames, jrtc27, asb, luismarques.
Herald added subscribers: jobnoorman, luke, VincentWu, vkmr, frasercrmck, evandro, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, hiraditya, arichardson.
Herald added a project: All.
craig.topper requested review of this revision.
Herald added subscribers: pcwang-thead, eopXD, MaskRay.
Herald added a project: LLVM.

The Zcb extension has c.lbu, but not c.lb. This patch makes us
prefer LBU over LB if we have a choice which will enable more
compression opportunities.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D146270

Files:
  llvm/lib/Target/RISCV/RISCVInstrInfo.td
  llvm/test/CodeGen/RISCV/atomic-rmw.ll
  llvm/test/CodeGen/RISCV/atomic-signext.ll
  llvm/test/CodeGen/RISCV/atomicrmw-uinc-udec-wrap.ll
  llvm/test/CodeGen/RISCV/forced-atomics.ll
  llvm/test/CodeGen/RISCV/hoist-global-addr-base.ll
  llvm/test/CodeGen/RISCV/local-stack-slot-allocation.ll
  llvm/test/CodeGen/RISCV/mem.ll
  llvm/test/CodeGen/RISCV/mem64.ll
  llvm/test/CodeGen/RISCV/memcpy-inline.ll
  llvm/test/CodeGen/RISCV/rv64i-shift-sext.ll
  llvm/test/CodeGen/RISCV/rvv/extractelt-i1.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vector-strided-load-store-asm.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-extract-i1.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-masked-gather.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-unaligned.ll
  llvm/test/CodeGen/RISCV/srem-seteq-illegal-types.ll
  llvm/test/CodeGen/RISCV/unaligned-load-store.ll
  llvm/test/CodeGen/RISCV/urem-seteq-illegal-types.ll

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