[all-commits] [llvm/llvm-project] 1395cd: [VPlan] Support multi-exit loops in HCFG builder.

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1395cd015f2edf26f8c2567870183d63f4fdd753
      https://github.com/llvm/llvm-project/commit/1395cd015f2edf26f8c2567870183d63f4fdd753
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-01-25 (Sat, 25 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanHCFGBuilder.cpp
    M llvm/unittests/Transforms/Vectorize/VPlanHCFGTest.cpp

  Log Message:
  -----------
  [VPlan] Support multi-exit loops in HCFG builder.

Update HCFG construction to support multi-exit loops. If there is no
unique exit block, map the middle block of the initial plan to the exit
block from the latch.

This further unifies HCFG construction and prepares for use to also
build an initial VPlan (VPlan0) for inner loops.

Effectively NFC as this isn't used on the default code path yet.



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