[PATCH] D148122: [AArch64][CostModel] Make sext/zext free if folded into a masked load

[David Sherwood via Phabricator via llvm-commits]

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The BasicTTIImpl implementation of getCastInstrCost ensures
that the cost of zext/sext is 0 when following a load if we
know the combined extending load is legal. For SVE we can do
the same for masked loads too, since they use exactly the
same underlying instruction.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D148122

Files:
  llvm/test/Analysis/CostModel/AArch64/masked_ldst.ll
  llvm/test/Analysis/CostModel/AArch64/sve-ldst.ll

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