[all-commits] [llvm/llvm-project] dadf6f: [VPlan] Ignore incoming values with constant false...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dadf6f2c5aaf83b27dab181be91c5814be1fc466
      https://github.com/llvm/llvm-project/commit/dadf6f2c5aaf83b27dab181be91c5814be1fc466
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-04-23 (Tue, 23 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/unused-blend-mask-for-first-operand.ll

  Log Message:
  -----------
  [VPlan] Ignore incoming values with constant false mask. (#89384)

Ignore incoming values with constant false masks when trying to simplify
VPBlendRecipes.

As a follow-on optimization, we should also be able to drop all incoming
values with false masks by creating a new VPBlendRecipe with those
operands dropped.

PR: https://github.com/llvm/llvm-project/pull/89384



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