[all-commits] [llvm/llvm-project] 934d5f: [PowerPC] Exploit xxperm, check for dead vectors a...

[maryammoghadas via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 934d5fa2b8672695c335deed0e19d0e777c98403
      https://github.com/llvm/llvm-project/commit/934d5fa2b8672695c335deed0e19d0e777c98403
  Author: Maryam Moghadas <maryammo at ca.ibm.com>
  Date:   2022-11-23 (Wed, 23 Nov 2022)

  Changed paths:
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/PowerPC/PPCISelLowering.h
    M llvm/lib/Target/PowerPC/PPCInstrAltivec.td
    M llvm/lib/Target/PowerPC/PPCInstrVSX.td
    M llvm/test/CodeGen/PowerPC/aix-p9-insert-extract.ll
    M llvm/test/CodeGen/PowerPC/aix-p9-xxinsertw-xxextractuw.ll
    M llvm/test/CodeGen/PowerPC/build-vector-tests.ll
    M llvm/test/CodeGen/PowerPC/canonical-merge-shuffles.ll
    M llvm/test/CodeGen/PowerPC/extract-and-store.ll
    M llvm/test/CodeGen/PowerPC/load-and-splat.ll
    M llvm/test/CodeGen/PowerPC/load-shuffle-and-shuffle-store.ll
    M llvm/test/CodeGen/PowerPC/p10-vector-rotate.ll
    M llvm/test/CodeGen/PowerPC/p9-vinsert-vextract.ll
    M llvm/test/CodeGen/PowerPC/ppc-shufflevector-combine.ll
    M llvm/test/CodeGen/PowerPC/ppc64-P9-vabsd.ll
    M llvm/test/CodeGen/PowerPC/pre-inc-disable.ll
    M llvm/test/CodeGen/PowerPC/srem-vector-lkk.ll
    M llvm/test/CodeGen/PowerPC/urem-vector-lkk.ll
    M llvm/test/CodeGen/PowerPC/v16i8_scalar_to_vector_shuffle.ll
    M llvm/test/CodeGen/PowerPC/v2i64_scalar_to_vector_shuffle.ll
    M llvm/test/CodeGen/PowerPC/v4i32_scalar_to_vector_shuffle.ll
    M llvm/test/CodeGen/PowerPC/v8i16_scalar_to_vector_shuffle.ll
    M llvm/test/CodeGen/PowerPC/vec-itofp.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_fp32_to_i16_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_fp32_to_i8_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_fp64_to_i16_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_fp64_to_i8_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_i16_to_fp32_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_i16_to_fp64_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_i8_to_fp32_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_conv_i8_to_fp64_elts.ll
    M llvm/test/CodeGen/PowerPC/vec_extract_p9.ll
    M llvm/test/CodeGen/PowerPC/vec_int_ext.ll
    M llvm/test/CodeGen/PowerPC/vector-constrained-fp-intrinsics.ll

  Log Message:
  -----------
  [PowerPC] Exploit xxperm, check for dead vectors and substitute vperm with xxperm

vperm instruction requires the data to be in the Altivec registers, if one of
the vector operands is not used after this vperm instruction then it can be
substituted by xxperm which doubles the number of available registers.

Reviewed By: stefanp

Differential Revision: https://reviews.llvm.org/D133700