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...do you have comments? Evan > > I would build whatever passes and infrastructure you need in order to load your profile data, in whatever format makes sense, and annotate the IR with metadata. I would just build them from scratch. I don't think there is anything to be gained from trying toclean up the existing profiling infrastructure when you'll end up re-using almost none of it, you will have different constraints when dealing with profiles from sampling tools, and will still have a common IR-level interface in the metadata. > >> >> 2- Passes should not need to be...

...is proposing. > >> >> I would build whatever passes and infrastructure you need in order to load your profile data, in whatever format makes sense, and annotate the IR with metadata. I would just build them from scratch. I don't think there is anything to be gained from trying toclean up the existing profiling infrastructure when you'll end up re-using almost none of it, you will have different constraints when dealing with profiles from sampling tools, and will still have a common IR-level interface in the metadata. >> >> >> 2- Passes should not need to...

...all of it, but that can happen later. I would build whatever passes and infrastructure you need in order to load your profile data, in whatever format makes sense, and annotate the IR with metadata. I would just build them from scratch. I don't think there is anything to be gained from trying toclean up the existing profiling infrastructure when you'll end up re-using almost none of it, you will have different constraints when dealing with profiles from sampling tools, and will still have a common IR-level interface in the metadata. > > 2- Passes should not need to be aware that pro...

I've been looking at the existing profile support in LLVM with the intent of incorporating other sources of profile information. In particular, I'm writing a tool that converts perf (http://perf.wiki.kernel.org) data into a loadable LLVM profile. First, I would like to describe what I understand about the current setup. Please correct me, as I'm likely to be missing a few things. I