[PATCH] D147072: InlineSpiller: Consider copy bundles when looking for snippet copies

[Matt Arsenault via Phabricator via llvm-commits]

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This was looking for full copies produced by SplitKit, but SplitKit
introduces copy bundles if not all lanes are live. The scan for uses
needs to look at bundles, not individual instructions.

      

This is a prerequisite to avoiding some redundant spills due to
subregisters which will help avoid an allocation failure in a future
patch.


https://reviews.llvm.org/D147072

Files:
  llvm/include/llvm/CodeGen/MachineInstrBundle.h
  llvm/lib/CodeGen/InlineSpiller.cpp
  llvm/lib/CodeGen/LiveRangeEdit.cpp
  llvm/lib/CodeGen/MachineInstrBundle.cpp
  llvm/test/CodeGen/AMDGPU/greedy-instruction-split-subrange.mir
  llvm/test/CodeGen/AMDGPU/spill-vector-superclass.ll
  llvm/test/CodeGen/AMDGPU/swdev380865.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-fp-interleave.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-interleave.ll
  llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int.ll
  llvm/test/CodeGen/Thumb2/mve-complex-deinterleaving-uniform-cases.ll
  llvm/test/CodeGen/Thumb2/mve-vst3.ll

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