[PATCH] D75689: [VectorCombine] fold extract-extract-op with different extraction indexes

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

> In D75689#1925667 <https://reviews.llvm.org/D75689#1925667>, @jgorbe wrote:
> 
>> Could you please revert it?

I'd prefer more specific reproduction steps before we make changes here. Ideally, please file a bug report with a reduced example.
Also, as noted in the description/commit message, I expected that this patch could cause perf problems, so there are debug options to help narrow those down:

  {-mllvm } -disable-binop-extract-shuffle / -disable-vector-combine

If we can use those (or even add more specific flags) to temporarily disable functionality while investigating, that would be more efficient than reverting.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D75689/new/

https://reviews.llvm.org/D75689