[PATCH] D145301: Add more efficient vector bitcast for AArch64

[Lawrence Benson via Phabricator via llvm-commits]

lawben updated this revision to Diff 506884.
lawben added a comment.

Apply the bitcast to truncating stores.

The first commit only covers the case with an explicit bitcast to a scalar value. When directly storing the comparison result as a scalar value, this can be done via a truncating 
store. In that case, we also want to apply the combine step to get the more efficient conversion.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145301/new/

https://reviews.llvm.org/D145301

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/vec-combine-compare-and-store.ll
  llvm/test/CodeGen/AArch64/vec-combine-compare-to-bitmask.ll

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