[PATCH] D76886: [InlineFunction] Disable emission of alignment assumptions by default

[Hal Finkel via Phabricator via llvm-commits]

hfinkel added a comment.

I don't object to doing this, but...

> After looking at IR diffs a bit more, one difference I noticed is that jump threading is not being performed in some places. In this case the reason is not multi-use, but cost heuristics based on instruction counts. The alignment assumption adds 4 extra instructions, and if the block duplication threshold is at 6 instructions, that can easily make a difference.

This an independent problem that we might fix first. Jump threading should be collecting and ignoring ephemeral values for it's heuristic. If it's not doing that, please fix that first and then reevaluate.


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  https://reviews.llvm.org/D76886/new/

https://reviews.llvm.org/D76886