[all-commits] [llvm/llvm-project] ea7ff4: [DominanceFrontier] Support multiple root nodes fo...

[Andrei Elovikov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ea7ff48c3108b8b4d49c252b31712c24f17a4ad9
      https://github.com/llvm/llvm-project/commit/ea7ff48c3108b8b4d49c252b31712c24f17a4ad9
  Author: Andrei Elovikov <andrei.elovikov at sifive.com>
  Date:   2026-03-02 (Mon, 02 Mar 2026)

  Changed paths:
    M llvm/include/llvm/Analysis/DominanceFrontier.h
    M llvm/include/llvm/Analysis/DominanceFrontierImpl.h
    M llvm/unittests/Transforms/Vectorize/VPPostDomFrontierTest.cpp

  Log Message:
  -----------
  [DominanceFrontier] Support multiple root nodes for post-dom (#181257)

Post-dominator tree has a notion of a single virtual root node, use that
in the dominance-frontier implementation to support multiple root nodes.

Originally part of https://github.com/llvm/llvm-project/pull/179336 but
split up into a separate later PR to ease review.

---------

Co-authored-by: Luke Lau <luke_lau at icloud.com>



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