[all-commits] [llvm/llvm-project] ad9da9: [LoopUnroll] Add RuntimeUnrollMultiExit to loop un...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ad9da92cf6f735747ef04fd56937e1d76819e503
      https://github.com/llvm/llvm-project/commit/ad9da92cf6f735747ef04fd56937e1d76819e503
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-01-27 (Mon, 27 Jan 2025)

  Changed paths:
    M llvm/include/llvm/Analysis/TargetTransformInfo.h
    M llvm/include/llvm/Transforms/Utils/UnrollLoop.h
    M llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
    M llvm/lib/Transforms/Utils/LoopUnroll.cpp
    M llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
    M llvm/unittests/Transforms/Utils/UnrollLoopTest.cpp

  Log Message:
  -----------
  [LoopUnroll] Add RuntimeUnrollMultiExit to loop unroll options (NFC) (#124462)

Add an extra knob to RuntimeUnrollMultiExit to let backends control
whether to allow multi-exit unrolling on a per-loop basis.

This gives backends more fine-grained control on deciding if multi-exit
unrolling is profitable for a given loop and uarch. Similar to
4226e0a0c75.

PR: https://github.com/llvm/llvm-project/pull/124462



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