[all-commits] [llvm/llvm-project] 4226e0: [TTI] Add SCEVExpansionBudget to loop unrolling op...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4226e0a0c75e5cfd784eff429f93101c03a1995c
      https://github.com/llvm/llvm-project/commit/4226e0a0c75e5cfd784eff429f93101c03a1995c
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-12-02 (Mon, 02 Dec 2024)

  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/LoopUnrollAndJam.cpp
    M llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
    M llvm/unittests/Transforms/Utils/UnrollLoopTest.cpp

  Log Message:
  -----------
  [TTI] Add SCEVExpansionBudget to loop unrolling options. (#118316)

Add an extra know to UnrollingPreferences to let backends control the
maximum budget for SCEV expansions.

This gives backends more fine-grained control on the cost of the runtime
checks for runtime unrolling.

PR: https://github.com/llvm/llvm-project/pull/118316



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