[all-commits] [llvm/llvm-project] 1093a1: [SandboxVec][DAG] Handle unscheduled successors wh...

[vporpo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1093a18ba312baf0734c1cbe21c99a5f51184cd0
      https://github.com/llvm/llvm-project/commit/1093a18ba312baf0734c1cbe21c99a5f51184cd0
  Author: vporpo <vasileios.porpodas at amd.com>
  Date:   2026-03-05 (Thu, 05 Mar 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.cpp
    M llvm/unittests/Transforms/Vectorize/SandboxVectorizer/DependencyGraphTest.cpp

  Log Message:
  -----------
  [SandboxVec][DAG] Handle unscheduled successors when user is external (#183861)

Whenever an IR use-def edge gets updated, the DAG gets notified about
the change by having its `notifySetUse()` callback called. The
callback's job is to update the DAG node's `UnscheduledSuccs` counter
which is the number of successor nodes that are yet to be scheduled.

This update makes sense only if both ends of the use-def edge are in the
DAG. Up until now we would still update the counter even if the user was
outside the DAG. This patch fixes this, so from now on we skip updatinge
`UnscheduledSuccs` if the user is outside the DAG.



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