[PATCH] D61228: [PowerPC] Set the innermost hot loop(from PGO) to align 32 bytes

[Nemanja Ivanovic via Phabricator via llvm-commits]

nemanjai added a comment.

> Can you explain why we don't always do this? You're checking for profiling data but then not using it?

I think the idea is that with PGO data, we are more certain that the hotness information is actually meaningful - since the alignment directive will only be emitted for loops that are "hot". Without PGO data, we will align a majority of loops which may be overkill. But this should be clearly stated in the comment though.


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  https://reviews.llvm.org/D61228/new/

https://reviews.llvm.org/D61228