[all-commits] [llvm/llvm-project] 597111: [AArch64][GlobalISel] Match G_DUP with undef eleme...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 597111e13f58bc2fbd8b63e19cb6320bb714dd7f
      https://github.com/llvm/llvm-project/commit/597111e13f58bc2fbd8b63e19cb6320bb714dd7f
  Author: David Green <david.green at arm.com>
  Date:   2026-05-05 (Tue, 05 May 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64Combine.td
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/postlegalizer-lowering-build-vector-to-dup.mir
    M llvm/test/CodeGen/AArch64/arm64-vhadd.ll
    M llvm/test/CodeGen/AArch64/cttz.ll
    M llvm/test/CodeGen/AArch64/dup.ll
    M llvm/test/CodeGen/AArch64/fadd-combines.ll
    M llvm/test/CodeGen/AArch64/fcmp.ll
    M llvm/test/CodeGen/AArch64/fcopysign.ll
    M llvm/test/CodeGen/AArch64/fcvt_combine.ll
    M llvm/test/CodeGen/AArch64/fixed-vector-interleave.ll
    M llvm/test/CodeGen/AArch64/fsh.ll
    M llvm/test/CodeGen/AArch64/hadd-combine.ll
    M llvm/test/CodeGen/AArch64/hoist-and-by-const-from-lshr-in-eqcmp-zero.ll
    M llvm/test/CodeGen/AArch64/hoist-and-by-const-from-shl-in-eqcmp-zero.ll
    M llvm/test/CodeGen/AArch64/icmp.ll
    M llvm/test/CodeGen/AArch64/rem-by-const.ll
    M llvm/test/CodeGen/AArch64/select_cc.ll
    M llvm/test/CodeGen/AArch64/shift.ll
    M llvm/test/CodeGen/AArch64/vec-combine-compare-to-bitmask.ll

  Log Message:
  -----------
  [AArch64][GlobalISel] Match G_DUP with undef elements (#195237)

This helps us match more vector splats that contain undef elements,
matching build vectors that contain undef so long as they contain at
least 2 duplicate entries.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications