paulkirth added a comment.

In D131306#4052782 <https://reviews.llvm.org/D131306#4052782>, @tejohnson wrote:

> In D131306#4037037 <https://reviews.llvm.org/D131306#4037037>, @paulkirth 
> wrote:
>
>> @tejohnson @xur I kind of dropped the ball on these patches, but what are 
>> your thoughts on this approach over the old(more invasive) change to the 
>> profdata format I had prototyped before? the patch will obviously need to be 
>> rebased, but other than that, do we see a downside to handling provenance 
>> tracking for branch weights this way?
>
> Sorry, it looks like you were waiting on a review of the latest changes from 
> me but I didn't get to it. I don't recall the other changes you prototyped 
> off the top of my head - can you point me to that?

It was just the last revision of this patch 
https://reviews.llvm.org/D131306?vs=on&id=450448#toc. The way I handled it 
before was to leave the MD_prof layout alone and use a new MD type to track the 
provenance. It had the benefit of leaving the layout alone, and the downside 
that //every// place that did something w/ MD_prof needed to copy that as well.

> But I don't have an issue with this approach as I recall it seemed cleanest 
> at the time.

Sounds good. I'll start work updating this then. Thanks!


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D131306/new/

https://reviews.llvm.org/D131306

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