[all-commits] [llvm/llvm-project] b1e21e: [VPlan] Handle step where sign cannot be determine...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b1e21e2e31541b02ea15719d6b7eec6bbb5508c1
      https://github.com/llvm/llvm-project/commit/b1e21e2e31541b02ea15719d6b7eec6bbb5508c1
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-08-02 (Sun, 02 Aug 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.h
    M llvm/test/Transforms/LoopVectorize/find-last-iv-sinkable-expr.ll

  Log Message:
  -----------
  [VPlan] Handle step where sign cannot be determined optimizeFindIVRed. (#213450)

optimizeFindIVReductions uses the step to determine if min or max is
needed. Bail out if the direction of the step cannot be determined via
SCEV.

Fixes https://github.com/llvm/llvm-project/issues/213424



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