[all-commits] [llvm/llvm-project] 0d69fb: [AArch64][GISel] Regbank G_BITCAST using src regba...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0d69fb3b995151ebbd83b03e94f7a301c7482b30
      https://github.com/llvm/llvm-project/commit/0d69fb3b995151ebbd83b03e94f7a301c7482b30
  Author: David Green <david.green at arm.com>
  Date:   2026-04-18 (Sat, 18 Apr 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64RegisterBankInfo.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/arm64-regbankselect.mir
    M llvm/test/CodeGen/AArch64/add.ll
    M llvm/test/CodeGen/AArch64/andorxor.ll
    M llvm/test/CodeGen/AArch64/arm64-neon-3vdiff.ll
    M llvm/test/CodeGen/AArch64/concat-vector.ll
    M llvm/test/CodeGen/AArch64/ctlz.ll
    M llvm/test/CodeGen/AArch64/ctpop.ll
    M llvm/test/CodeGen/AArch64/cttz.ll
    M llvm/test/CodeGen/AArch64/highextractbitcast.ll
    M llvm/test/CodeGen/AArch64/mul.ll
    M llvm/test/CodeGen/AArch64/popcount.ll
    M llvm/test/CodeGen/AArch64/qmovn.ll
    M llvm/test/CodeGen/AArch64/sadd_sat_vec.ll
    M llvm/test/CodeGen/AArch64/ssub_sat_vec.ll
    M llvm/test/CodeGen/AArch64/sub.ll
    M llvm/test/CodeGen/AArch64/uadd_sat_vec.ll
    M llvm/test/CodeGen/AArch64/usub_sat_vec.ll
    M llvm/test/CodeGen/AArch64/vec-combine-compare-to-bitmask.ll

  Log Message:
  -----------
  [AArch64][GISel] Regbank G_BITCAST using src regbank. (#191522)

This takes the regbank of a G_BITCAST from the input srcreg that has
already been allocated, keeping the bitcast on the same bank. A copy
then might be added to the dst if needed.

onlyUsesFP is also improved for G_BITCAST, allowing operations to guess
the correct type through a onlyUsesFP too.

Originally from #177158 by Ryan Cowan with modifications.



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