[all-commits] [llvm/llvm-project] 522b05: [VPlan] Construct immutable VPIRBBs for exit block...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 522b05afb636229acd1f2a50eff14a29c79b4a1a
      https://github.com/llvm/llvm-project/commit/522b05afb636229acd1f2a50eff14a29c79b4a1a
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-02-25 (Tue, 25 Feb 2025)

  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/lib/Transforms/Vectorize/VPlanCFG.h
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp

  Log Message:
  -----------
  [VPlan] Construct immutable VPIRBBs for exit blocks at construction(NFC) (#128374)

Constract immutable VPIRBasicBlocks for all exit blocks up front and
keep a list of them. Same as the scalar header, they are leaf nodes of
the VPlan and won't change. Some exit blocks may be unreachable, e.g. if
the scalar epilogue always executes or depending on optimizations.

This simplifies both the way we retrieve the exit blocks as well as
hooking up the exit blocks.

PR: https://github.com/llvm/llvm-project/pull/128374



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