[PATCH] D121400: [AArch64] Custom lower concat(v4i8 load, ...)

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, samtebbs, jaykang10, labrinea, sdesmalen.
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We already have custom lowering for v4i8 load, which loads as a f32, converts to a vector and bitcasts and extends the result to a v4i16. This adds some custom lowering of concat(v4i8 load, ...) to keep the result as an f32 and create a buildvector of the resulting f32 loads. This helps not create all the extends and bitcasts, which are often difficult to fully clean up.


https://reviews.llvm.org/D121400

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/insert-extend.ll
  llvm/test/CodeGen/AArch64/insert-subvector.ll

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