[PATCH] D31599: [CodeGen] Add Performance Monitor

[Tobias Grosser via Phabricator via llvm-commits]

grosser added a comment.

Yes, until know this works only on X86. I intended this as a basic debugging facility. If there is interest (and instructions) it would be nice to generalize this. For ARM we could emit "MRC" instructions, but they do not seem to be accessible by default: http://blog.regehr.org/archives/794

Maybe we should just assert if this is not X86_64 for now?


https://reviews.llvm.org/D31599