[PATCH] D116720: [RISCV] Use shift for zext.h when Zbb and Zbp are not enabled

[Haocong Lu via Phabricator via llvm-commits]

Luhaocong created this revision.
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Now AND is used for zero extension when Zbb and Zbp are both not enabled.
It's better to use shift operation if mask exceeds simm12.

This  patch optimzes LUI + ADDI + AND to SLLI + SRLI when mask is 0xffff.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116720

Files:
  llvm/lib/Target/RISCV/RISCV.td
  llvm/lib/Target/RISCV/RISCVInstrInfo.td
  llvm/test/CodeGen/RISCV/alu16.ll
  llvm/test/CodeGen/RISCV/atomic-rmw.ll
  llvm/test/CodeGen/RISCV/atomic-signext.ll
  llvm/test/CodeGen/RISCV/bswap-ctlz-cttz-ctpop.ll
  llvm/test/CodeGen/RISCV/calling-conv-half.ll
  llvm/test/CodeGen/RISCV/calling-conv-ilp32-ilp32f-ilp32d-common.ll
  llvm/test/CodeGen/RISCV/calling-conv-lp64-lp64f-lp64d-common.ll
  llvm/test/CodeGen/RISCV/div.ll
  llvm/test/CodeGen/RISCV/half-arith.ll
  llvm/test/CodeGen/RISCV/half-convert-strict.ll
  llvm/test/CodeGen/RISCV/half-convert.ll
  llvm/test/CodeGen/RISCV/half-intrinsics.ll
  llvm/test/CodeGen/RISCV/rem.ll
  llvm/test/CodeGen/RISCV/rv32zbb.ll
  llvm/test/CodeGen/RISCV/rv32zbp.ll
  llvm/test/CodeGen/RISCV/rv64zbb.ll
  llvm/test/CodeGen/RISCV/rv64zbp.ll
  llvm/test/CodeGen/RISCV/rv64zfh-half-convert.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int-vp.ll
  llvm/test/CodeGen/RISCV/rvv/vreductions-int-vp.ll
  llvm/test/CodeGen/RISCV/sext-zext-trunc.ll

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