[PATCH] D90941: [SVE][CodeGen] Lower scalable masked scatters

[Kerry McLaughlin via Phabricator via llvm-commits]

kmclaughlin created this revision.
kmclaughlin added reviewers: sdesmalen, efriedma, fhahn, craig.topper.
Herald added subscribers: llvm-commits, psnobl, hiraditya, tschuett.
Herald added a project: LLVM.
kmclaughlin requested review of this revision.

Lowers the llvm.masked.scatter intrinsics (scalar plus vector addressing mode only)

Changes included in this patch:

- Custom lowering for MSCATTER, which chooses the appropriate scatter store opcode to use. Floating-point scatters are cast to integer, with patterns added to match FP reinterpret_casts.
- Added the getCanonicalIndexType function to convert redundant addressing modes (e.g. scaling is redundant when accessing bytes)
- Tests with 32 & 64-bit scaled & unscaled offsets


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90941

Files:
  llvm/include/llvm/CodeGen/SelectionDAGNodes.h
  llvm/include/llvm/CodeGen/TargetLowering.h
  llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
  llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
  llvm/test/CodeGen/AArch64/sve-masked-scatter-32b-scaled.ll
  llvm/test/CodeGen/AArch64/sve-masked-scatter-32b-unscaled.ll
  llvm/test/CodeGen/AArch64/sve-masked-scatter-64b-scaled.ll
  llvm/test/CodeGen/AArch64/sve-masked-scatter-64b-unscaled.ll

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