[all-commits] [llvm/llvm-project] fe5c4a: [LoopVectorize] Use SetVector to track uniform use...

[huihzhang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fe5c4a06a49c697399323cc55e2135a5452ed616
      https://github.com/llvm/llvm-project/commit/fe5c4a06a49c697399323cc55e2135a5452ed616
  Author: Huihui Zhang <huihuiz at quicinc.com>
  Date:   2021-03-31 (Wed, 31 Mar 2021)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

  Log Message:
  -----------
  [LoopVectorize] Use SetVector to track uniform uses to prevent non-determinism.

Use SetVector instead of SmallPtrSet to track values with uniform use. Doing this
can help avoid non-determinism caused by iterating over unordered containers.

This bug was found with reverse iteration turning on,
--extra-llvm-cmake-variables="-DLLVM_REVERSE_ITERATION=ON".
Failing LLVM test consecutive-ptr-uniforms.ll .

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D99549