[PATCH] D119424: [AArch64][SVE] Invert VSelect operand order and condition for predicated arithmetic operations

Matt Devereau via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Feb 10 03:37:35 PST 2022


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(vselect (p) (a) (op (a) (b))) => (vselect (!p) (op (a) (b)) (a))

      

As a follow up to D117689 <https://reviews.llvm.org/D117689>, invert the operand order and condition for (vselect (p) (a) (op (a) (b))) in order to fold vselects into predicated instructions.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D119424

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/sve-fp-reciprocal.ll
  llvm/test/CodeGen/AArch64/sve-select.ll

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