[all-commits] [llvm/llvm-project] 6383a1: [VPlan] Refactor HCFG builder to preserve original...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6383a12e3b4339fa4743bb97da4d51dea6d2e2ea
      https://github.com/llvm/llvm-project/commit/6383a12e3b4339fa4743bb97da4d51dea6d2e2ea
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-01-25 (Sat, 25 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    M llvm/lib/Transforms/Vectorize/VPlanHCFGBuilder.cpp
    M llvm/test/Transforms/LoopVectorize/vplan-printing-outer-loop.ll
    M llvm/unittests/Transforms/Vectorize/VPlanHCFGTest.cpp

  Log Message:
  -----------
  [VPlan] Refactor HCFG builder to preserve original vector latch (NFC).

Update HCFG builder to preserve the original latch block of the initial
VPlan, ensuring there is always a latch.

It also skips creating the BranchOnCond for the latch of the top-level
loop, instead of removing it later. Exiting via the latch is controlled
by later recipes.

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



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