[PATCH] D108826: [SLP][LTO][WIP]Allow full SLP in LTO only at link time.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added a comment.

In D108826#2969701 <https://reviews.llvm.org/D108826#2969701>, @nikic wrote:

> @ABataev The pipeline already distinguishes between pre-link and post-link optimization pipelines, see e.g. the flag that gets passed to LoopRotate to control rotation of loops with calls (https://github.com/llvm/llvm-project/blob/2f69c82cec1ae05b4fdcef4ac48f48e9e2bad32b/llvm/lib/Passes/PassBuilder.cpp#L760). You'd probably want to do something similar here.

Probably, will check, thanks for the link.

> Though TBH I'm surprised that we perform vectorization in the pre-link pipelines at all, I'd have assumed that this only gets done in the LTO step.

No, also at the compile time. Most probably, just nobody looked at it.


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