[PATCH] D74933: [Hexagon] Introduce noop intrinsic to cast between vector predicate types

[Krzysztof Parzyszek via Phabricator via llvm-commits]

kparzysz created this revision.
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The (overloaded) intrinsic is `llvm.hexagon.V6.pred.typecast[.128B]`. The types of the operand and the return value are HVX boolean vector types. For each cast, there need to be the corresponding intrinsic declared, with different suffixes appended to the name, e.g.

  ; cast <128 x i1> to <32 x i1>
  declare <32 x i1> @llvm.hexagon.V6.pred.typecast.128B.s1(<128 x i1>)
  ; cast <32 x i1> to <64 x i1>
  declare <64 x i1> @llvm.hexagon.V6.pred.typecast.128B.s2(<32 x i1>)

etc.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D74933

Files:
  llvm/include/llvm/IR/IntrinsicsHexagon.td
  llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
  llvm/lib/Target/Hexagon/HexagonISelLowering.h
  llvm/lib/Target/Hexagon/HexagonISelLoweringHVX.cpp
  llvm/test/CodeGen/Hexagon/autohvx/vector-predicate-typecast.ll

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