[all-commits] [llvm/llvm-project] 726746: [LV] Add tests for zero branch weights and executi...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 72674697a28c25467649c4993eb033dc4af65951
      https://github.com/llvm/llvm-project/commit/72674697a28c25467649c4993eb033dc4af65951
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-09-25 (Fri, 25 Sep 2026)

  Changed paths:
    M llvm/test/Transforms/LoopVectorize/VPlan/execution-frequencies-match-bfi.ll
    M llvm/test/Transforms/LoopVectorize/X86/predicated-instruction-cost.ll
    M llvm/test/Transforms/LoopVectorize/replicate-region-branch-weights.ll

  Log Message:
  -----------
  [LV] Add tests for zero branch weights and execution frequencies (NFC). (#226553)

Add missing test coverage for VPlan-based execution frequency
computation:
 * blocks entered via an edge with zero branch weight, 
 * blocks whose sibling edge has zero weight, 
 * nested branches whose skipping edges have zero weight, 
* a block executing on all paths through the loop after a switch whose
probabilities do not add up to 1,
 * frequencies below the smallest representable non-zero one
 * all-zero weights making a join's frequency unknown
 * estimated frequencies propagating through a branch with weights.

Also updates
llvm/test/Transforms/LoopVectorize/VPlan/execution-frequencies-match-bfi.ll
to check frequencies directly after the frequencies have been recorded.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications