[PATCH] D114856: [RISCV] Override TargetLowering::BuildSDIVPow2 to generate SELECT

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When `Zbt` is enabled, we can generate SELECT for division by power
of 2, so that there is no data dependency.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D114856

Files:
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.h
  llvm/test/CodeGen/RISCV/rv32zbt-div-pow2.ll
  llvm/test/CodeGen/RISCV/rv64zbt-div-pow2.ll

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