[all-commits] [llvm/llvm-project] 8e43c2: [RISCV] Use LBU for extloadi8.

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8e43c22d303835bf90a64f6732df4dfc028ac688
      https://github.com/llvm/llvm-project/commit/8e43c22d303835bf90a64f6732df4dfc028ac688
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-03-21 (Tue, 21 Mar 2023)

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

  Log Message:
  -----------
  [RISCV] Use LBU for extloadi8.

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.

Reviewed By: asb

Differential Revision: https://reviews.llvm.org/D146270