[all-commits] [llvm/llvm-project] ada4f7: [RISCV][P-ext] Improve RV64 v2i16 reverse codegen ...

[SiHuaN via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ada4f7cffcff8eba94a193cf85fe1fa828ed9ec5
      https://github.com/llvm/llvm-project/commit/ada4f7cffcff8eba94a193cf85fe1fa828ed9ec5
  Author: SiHuaN <liyongtai at iscas.ac.cn>
  Date:   2026-07-13 (Mon, 13 Jul 2026)

  Changed paths:
    M cross-project-tests/intrinsic-header-tests/riscv_packed_simd.c
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVInstrInfoP.td
    M llvm/test/CodeGen/RISCV/rvp-reverse.ll

  Log Message:
  -----------
  [RISCV][P-ext] Improve RV64 v2i16 reverse codegen (#208664)

On RV64, v2i16 is widened to v4i16 before shuffle lowering. Recognize
the widened low-half reverse and select ppairoe.h directly instead of
rev16 followed by srli.



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