[PATCH] D113050: [PowerPC] Exploit XXPERM Instruction

[Albion Fung via Phabricator via llvm-commits]

Conanap created this revision.
Conanap added reviewers: nemanjai, PowerPC.
Conanap added projects: PowerPC, clang, LLVM.
Herald added subscribers: kbarton, hiraditya.
Conanap requested review of this revision.

When a vector input is dead, we can use it as the target
instead of using extra registers. This is the first part of a
two part patch. This patch checks only if the first
input is dead, and if it is, to replace VPERM with XXPERM.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D113050

Files:
  llvm/lib/Target/PowerPC/PPCISelLowering.cpp
  llvm/lib/Target/PowerPC/PPCISelLowering.h
  llvm/lib/Target/PowerPC/PPCInstrVSX.td
  llvm/test/CodeGen/AArch64/srem-vector-lkk.ll
  llvm/test/CodeGen/PowerPC/aix-p9-insert-extract.ll
  llvm/test/CodeGen/PowerPC/build-vector-tests.ll
  llvm/test/CodeGen/PowerPC/canonical-merge-shuffles.ll
  llvm/test/CodeGen/PowerPC/extract-and-store.ll
  llvm/test/CodeGen/PowerPC/hoist-cp-loads.ll
  llvm/test/CodeGen/PowerPC/load-shuffle-and-shuffle-store.ll
  llvm/test/CodeGen/PowerPC/p10-vector-rotate.ll
  llvm/test/CodeGen/PowerPC/p9-vinsert-vextract.ll
  llvm/test/CodeGen/PowerPC/pre-inc-disable.ll
  llvm/test/CodeGen/PowerPC/srem-vector-lkk.ll
  llvm/test/CodeGen/PowerPC/urem-vector-lkk.ll
  llvm/test/CodeGen/PowerPC/vec-itofp.ll
  llvm/test/CodeGen/PowerPC/vec_conv_fp32_to_i16_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_fp32_to_i8_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_fp64_to_i16_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_fp64_to_i8_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_i16_to_fp32_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_i16_to_fp64_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_i8_to_fp32_elts.ll
  llvm/test/CodeGen/PowerPC/vec_conv_i8_to_fp64_elts.ll
  llvm/test/CodeGen/PowerPC/vec_extract_p9.ll
  llvm/test/CodeGen/PowerPC/vec_int_ext.ll
  llvm/test/CodeGen/PowerPC/vector-constrained-fp-intrinsics.ll
  llvm/test/CodeGen/PowerPC/xxperm-tests.ll

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