[PATCH] D49281: [Unroll/UnrollAndJam/Vectorizer/Distribute] Add followup loop attributes.

[Michael Kruse via Phabricator via llvm-commits]

Meinersbur added a comment.

In https://reviews.llvm.org/D49281#1189774, @hsaito wrote:

> I'd like to see us explicitly saying that any subsequent explicit transformation metadata will be ignored for the given loop ---- if that's what we'll agree on, or be explicit about something else we'll agree on in the terms that can be clearly explainable to the programmers. "Compiler will skip all remaining transformations after the first failed transform" is pretty straightforward to the programmers. If anyone is proposing other behaviors, I'd like to also see how to explain those behaviors to the programmers.


I added a paragraph to `TransformMetadata.rst`. (I was assuming it was obvious from the definition: A transformation in a followup-attribute only becomes assigned to a loop by the loop transformation pass. Before that, it is not associated with any loop)


Repository:
  rL LLVM

https://reviews.llvm.org/D49281