[PATCH] D134377: [SLP]Try to emit canonical shuffle with undef operand.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added a comment.

In D134377#3838960 <https://reviews.llvm.org/D134377#3838960>, @dyung wrote:

> Hi @ABataev, we have an internal test where this seemed to cause the codegen for a horizontal add test to get worse (I think) after your change. I have filed the issue as #58177, can you take a look?

Looks like need to add the analysis of freeze instructions to the shuffles emission/cost estimation function, will do it later today.


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https://reviews.llvm.org/D134377