[all-commits] [llvm/llvm-project] 678595: [Machine-Combiner] Add a pass to reassociate chain...

[Jonathan Cohen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6785951410c35aa9429152d3e041b44b79db53f2
      https://github.com/llvm/llvm-project/commit/6785951410c35aa9429152d3e041b44b79db53f2
  Author: Jonathan Cohen <joncoh at apple.com>
  Date:   2025-03-25 (Tue, 25 Mar 2025)

  Changed paths:
    M llvm/include/llvm/CodeGen/MachineCombinerPattern.h
    M llvm/include/llvm/CodeGen/TargetInstrInfo.h
    M llvm/lib/CodeGen/TargetInstrInfo.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.h
    A llvm/test/CodeGen/AArch64/aarch64-reassociate-accumulators-sve.ll
    A llvm/test/CodeGen/AArch64/aarch64-reassociate-accumulators.ll
    A llvm/test/CodeGen/AArch64/machine-combiner-reassociate-accumulators.mir

  Log Message:
  -----------
  [Machine-Combiner] Add a pass to reassociate chains of accumulation instructions into a tree (#132728)

This pass is designed to increase ILP by performing accumulation into
multiple registers. It currently supports only the S/UABAL accumulation
instruction, but can be extended to support additional instructions.

Reland of  #126060 which was reverted due to a conflict with #131272.



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