[all-commits] [llvm/llvm-project] ec402a: [VPlan] Implement cloning of VPlans. (#73158)

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ec402a2e532db7ec38e6aef0ed1b1c04c6769d9b
      https://github.com/llvm/llvm-project/commit/ec402a2e532db7ec38e6aef0ed1b1c04c6769d9b
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-01-27 (Sat, 27 Jan 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/unittests/Transforms/Vectorize/VPlanTest.cpp

  Log Message:
  -----------
  [VPlan] Implement cloning of VPlans. (#73158)

This patch implements cloning for VPlans and recipes. Cloning is used in
the epilogue vectorization path, to clone the VPlan for the main vector
loop. This means we won't re-use a VPlan when executing the VPlan for
the epilogue vector loop, which in turn will enable us to perform
optimizations based on UF & VF.