[PATCH] D140100: [SLP]Integrate looking through shuffles logic into ShuffleInstructionBuilder.

[Alexander Kornienko via Phabricator via llvm-commits]

alexfh added a comment.

In D140100#4018269 <https://reviews.llvm.org/D140100#4018269>, @asmok-g wrote:

> Heads-up: This has caused a change in behavior when using `#pragma unroll` in some test using SIMD. In other words, using `#pragma unroll` results in a different output than without it. I'm preparing a reduced test case.

I've got a reduced IR file for that case: F26088275: q.ll <https://reviews.llvm.org/F26088275>

  $ old-clang -O2 q.ll && ./a.out
  0.0
  $ new-clang -O2 q.ll && ./a.out
  5.0

Please fix or revert the patch, if there's no trivial fix.

Thanks!


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  https://reviews.llvm.org/D140100/new/

https://reviews.llvm.org/D140100