[PATCH] D128926: [AArch64] NFC: Move safe predicate casting to a separate function.

[Sander de Smalen via Phabricator via llvm-commits]

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This patch puts the code to safely bitcast a predicate, and possibly zero
any undefined lanes when doing a widening cast, into one place and merges
the functionality with lowerConvertToSVBool.

This is some cleanup inspired by D128665 <https://reviews.llvm.org/D128665>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D128926

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h

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