[all-commits] [llvm/llvm-project] c0931d: [AArch64][GlobalISel] Lower scalarizing G_UNMERGE_...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c0931d4950a93526aa08ec3ab86f64ffb616b406
      https://github.com/llvm/llvm-project/commit/c0931d4950a93526aa08ec3ab86f64ffb616b406
  Author: David Green <david.green at arm.com>
  Date:   2023-12-21 (Thu, 21 Dec 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64Combine.td
    M llvm/lib/Target/AArch64/AArch64InstrInfo.td
    M llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerLowering.cpp
    M llvm/test/CodeGen/AArch64/aarch64-minmaxv.ll
    M llvm/test/CodeGen/AArch64/aarch64-mulv.ll
    M llvm/test/CodeGen/AArch64/aarch64-smull.ll
    M llvm/test/CodeGen/AArch64/fptoi.ll
    M llvm/test/CodeGen/AArch64/reduce-and.ll
    M llvm/test/CodeGen/AArch64/reduce-or.ll
    M llvm/test/CodeGen/AArch64/reduce-xor.ll
    M llvm/test/CodeGen/AArch64/sext.ll
    M llvm/test/CodeGen/AArch64/vecreduce-umax-legalization.ll
    M llvm/test/CodeGen/AArch64/xtn.ll
    M llvm/test/CodeGen/AArch64/zext.ll

  Log Message:
  -----------
  [AArch64][GlobalISel] Lower scalarizing G_UNMERGE_VALUES to G_EXTRACT_VECTOR_ELT

This adds post-legalizing lowering of G_UNMERGE_VALUES which take a vector and
produce scalar values for each lane. They are converted to a G_EXTRACT_VECTOR_ELT
for each lane, allowing all the existing tablegen patterns to apply to them.

A couple of tablegen patterns need to be altered to make sure the type of the
constant operand is known, so that the patterns are recognized under global
isel.

Closes #75662