[PATCH] D106365: [AArch64] Prefer fmov over orr v.16b when copying f32/f64

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: fhahn, t.p.northover.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
dmgreen requested review of this revision.
Herald added a project: LLVM.

This change the lowering of f32 and f64 COPY from a 128bit vector ORR to a fmov of the appropriate type. At least on some CPU's with 64bit NEON data paths this is expected to be faster, and shouldn't be slower on any CPU that treats fmov as a register rename.


https://reviews.llvm.org/D106365

Files:
  llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
  llvm/test/CodeGen/AArch64/arm64-AdvSIMD-Scalar.ll
  llvm/test/CodeGen/AArch64/arm64-aapcs.ll
  llvm/test/CodeGen/AArch64/arm64-neon-copy.ll
  llvm/test/CodeGen/AArch64/arm64-vcvt_f.ll
  llvm/test/CodeGen/AArch64/arm64-vector-insertion.ll
  llvm/test/CodeGen/AArch64/bf16-vector-bitcast.ll
  llvm/test/CodeGen/AArch64/bf16-vector-shuffle.ll
  llvm/test/CodeGen/AArch64/bitcast-promote-widen.ll
  llvm/test/CodeGen/AArch64/combine-comparisons-by-cse.ll
  llvm/test/CodeGen/AArch64/f16-instructions.ll
  llvm/test/CodeGen/AArch64/fadd-combines.ll
  llvm/test/CodeGen/AArch64/fast-isel-select.ll
  llvm/test/CodeGen/AArch64/fp16-v4-instructions.ll
  llvm/test/CodeGen/AArch64/fp16-vector-bitcast.ll
  llvm/test/CodeGen/AArch64/fptosi-sat-scalar.ll
  llvm/test/CodeGen/AArch64/fptosi-sat-vector.ll
  llvm/test/CodeGen/AArch64/fptoui-sat-scalar.ll
  llvm/test/CodeGen/AArch64/fptoui-sat-vector.ll
  llvm/test/CodeGen/AArch64/machine-combiner.ll
  llvm/test/CodeGen/AArch64/mla_mls_merge.ll
  llvm/test/CodeGen/AArch64/neon-mla-mls.ll
  llvm/test/CodeGen/AArch64/popcount.ll
  llvm/test/CodeGen/AArch64/sqrt-fastmath.ll
  llvm/test/CodeGen/AArch64/swift-return.ll
  llvm/test/CodeGen/AArch64/urem-vector-lkk.ll
  llvm/test/CodeGen/AArch64/vec-libcalls.ll
  llvm/test/Transforms/LoopStrengthReduce/AArch64/small-constant.ll

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