[all-commits] [llvm/llvm-project] 73f5d7: [VPlan] Handle equal address and store ops in only...

Florian Hahn via All-commits all-commits at lists.llvm.org
Fri Apr 15 13:54:01 PDT 2022

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 73f5d7d0d6ec0eb474925f1952fd7b6f92024fa1
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2022-04-15 (Fri, 15 Apr 2022)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/test/Transforms/LoopVectorize/opaque-ptr.ll

  Log Message:
  [VPlan] Handle equal address and store ops in onlyFirstLaneDemanded.

With opaque pointers, the stored value and address can be the same.

Previously the code in VPWidenMemoryInstructionRecipe::onlyFirstLaneDemanded
incorrectly considers stores with matching store and pointer operands as
only demanding the first lane, causing a crash.

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