[all-commits] [llvm/llvm-project] 0d5db4: [AArch64][GlobalISel] Bitcast and Build Illegal G_...

[chuongg3 via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0d5db4e7ba59bd9cbd956beff8d672a239c9ea12
      https://github.com/llvm/llvm-project/commit/0d5db4e7ba59bd9cbd956beff8d672a239c9ea12
  Author: chuongg3 <chuong.goh at arm.com>
  Date:   2024-07-15 (Mon, 15 Jul 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/legalize-concat-vectors.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
    M llvm/test/CodeGen/AArch64/concat-vector.ll
    M llvm/test/CodeGen/AArch64/fixed-vector-interleave.ll

  Log Message:
  -----------
  [AArch64][GlobalISel] Bitcast and Build Illegal G_CONCAT_VECTOR Instructions (#96492)

Attempts to handle illegal G_CONCAT_VECTOR instructions by bitcasting the source
into scalar values and using G_BUILD_VECTOR instead

Treating the G_CONCAT_VECTORS instruction in the legalization artefact by folding
away concat(bitcast, ...) into buildvector(...) would require check for ImpDef created
by the shuffles in llvm.



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