[all-commits] [llvm/llvm-project] d3ce06: [AArch64][GlobalISel] Legalize ptr shuffle vector ...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d3ce069572cb565da613df9828ac54f7edb2fc00
      https://github.com/llvm/llvm-project/commit/d3ce069572cb565da613df9828ac54f7edb2fc00
  Author: David Green <david.green at arm.com>
  Date:   2024-11-23 (Sat, 23 Nov 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
    M llvm/include/llvm/CodeGen/GlobalISel/LegalizerInfo.h
    M llvm/lib/CodeGen/GlobalISel/LegalityPredicates.cpp
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-shuffle-vector.mir
    M llvm/test/CodeGen/AArch64/arm64-ext.ll
    M llvm/test/CodeGen/AArch64/neon-perm.ll
    M llvm/test/CodeGen/AArch64/neon-vector-splat.ll
    M llvm/test/CodeGen/AArch64/shufflevector.ll

  Log Message:
  -----------
  [AArch64][GlobalISel] Legalize ptr shuffle vector to s64 (#116013)

This converts all ptr element shuffle vectors to s64, so that the
existing vector legalization handling can lower them as needed. This
prevents a lot of fallbacks that currently try to generate things like
`<2 x ptr> G_EXT`.

I'm not sure if bitcast/inttoptr/ptrtoint is intended to be necessary
for vectors of pointers, but it uses buildCast for the casts, which now
generates a ptrtoint/inttoptr.



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