[all-commits] [llvm/llvm-project] 482303: [ARM] Remove DLS lr, lr

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 48230355e930c592ec105ed71963459671c54a42
      https://github.com/llvm/llvm-project/commit/48230355e930c592ec105ed71963459671c54a42
  Author: David Green <david.green at arm.com>
  Date:   2021-02-02 (Tue, 02 Feb 2021)

  Changed paths:
    M llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/cond-vector-reduce-mve-codegen.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/constbound.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/ctlz-non-zeros.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/disjoint-vcmp.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/dont-remove-loop-update.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/fast-fp-loops.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/incorrect-sub-16.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/incorrect-sub-32.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/incorrect-sub-8.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/inloop-vpnot-1.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/inloop-vpnot-2.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/inloop-vpnot-3.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/it-block-chain-store.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/loop-guards.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/lstp-insertion-position.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/matrix.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/minloop.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/move-def-before-start.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/move-start-after-def.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/multi-block-cond-iter-count.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/mve-float-loops.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/mve-tail-data-types.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/non-masked-load.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/non-masked-store.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/reductions.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/remat-vctp.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/remove-elem-moves.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/skip-debug.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/unpredload.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/unrolled-and-vector.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/vaddv.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/vctp-in-vpt.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/vctp16-reduce.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/vector-arith-codegen.ll
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/vpt-blocks.mir
    M llvm/test/CodeGen/Thumb2/LowOverheadLoops/wrong-liveout-lsr-shift.mir
    M llvm/test/CodeGen/Thumb2/active_lane_mask.ll
    M llvm/test/CodeGen/Thumb2/aligned-nonfallthrough.ll
    M llvm/test/CodeGen/Thumb2/mve-float16regloops.ll
    M llvm/test/CodeGen/Thumb2/mve-float32regloops.ll
    M llvm/test/CodeGen/Thumb2/mve-fp16convertloops.ll
    M llvm/test/CodeGen/Thumb2/mve-gather-ptrs.ll
    M llvm/test/CodeGen/Thumb2/mve-gather-scatter-optimisation.ll
    M llvm/test/CodeGen/Thumb2/mve-gather-scatter-ptr-address.ll
    M llvm/test/CodeGen/Thumb2/mve-gather-scatter-tailpred.ll
    M llvm/test/CodeGen/Thumb2/mve-nounrolledremainder.ll
    M llvm/test/CodeGen/Thumb2/mve-postinc-distribute.ll
    M llvm/test/CodeGen/Thumb2/mve-postinc-lsr.ll
    M llvm/test/CodeGen/Thumb2/mve-pred-threshold.ll
    M llvm/test/CodeGen/Thumb2/mve-satmul-loops.ll
    M llvm/test/CodeGen/Thumb2/mve-shifts-scalar.ll
    M llvm/test/CodeGen/Thumb2/mve-vabdus.ll
    M llvm/test/CodeGen/Thumb2/mve-vecreduce-loops.ll
    M llvm/test/CodeGen/Thumb2/mve-vldshuffle.ll
    M llvm/test/CodeGen/Thumb2/mve-vldst4.ll
    M llvm/test/CodeGen/Thumb2/mve-vqdmulh.ll
    M llvm/test/Transforms/HardwareLoops/ARM/calls-codegen.ll
    M llvm/test/Transforms/HardwareLoops/ARM/simple-do.ll
    M llvm/test/Transforms/HardwareLoops/ARM/structure.ll

  Log Message:
  -----------
  [ARM] Remove DLS lr, lr

A DLS lr, lr instruction only moves lr to itself. It need not be emitted
on it's own to save a instruction in the loop preheader.

Differential Revision: https://reviews.llvm.org/D78916