rnk added a comment.

In https://reviews.llvm.org/D47672#1128308, @hans wrote:

> It sounds like adding proper support for HLE prefixes is a largeish project.
>
> ctopper, rnk: Do you think it would be worth adding inline asm versions (with 
> the xacquire/release prefixes) of these intrinsics in the meantime? It would 
> inhibit optimizations but be better than the current state of not having the 
> intrinsics at all.


Yeah, let's do that. I'm a lot more comfortable ignoring bugs about missed 
optimizations with fancy intrinsics than bugs that say the intrinsic doesn't do 
what it says it does.


Repository:
  rC Clang

https://reviews.llvm.org/D47672



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