[PATCH] D88020: [SplitKit] In addDeadDef tolerate parent range that defines more lanes

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
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Following on from D87757 <https://reviews.llvm.org/D87757> "[SplitKit] Only copy live lanes", in
SplitEditor::addDeadDef, when we're checking whether the parent live
interval has a subrange defining the same lanes, tolerate the case
where the parent subrange defines a superset of the lanes. This can
happen when the child subrange comes from SplitEditor::buildCopy
decomposing a partial copy into a sequence of subreg copies that cover
the required lanes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88020

Files:
  llvm/lib/CodeGen/SplitKit.cpp
  llvm/lib/CodeGen/SplitKit.h
  llvm/test/CodeGen/AMDGPU/splitkit-getsubrangeformask.ll

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