[patch] Shark reroute LLVM atomic intrinsics to Zero

[Robert Schuster]

Hi Andrew,

Andrew Haley schrieb:
> Definitely; we really don't want a function call just do do an atomic
> cmpxchg.
That is why I opted for enabling it only for the arches that really need
it by using #ifdef.

>  This is really just a workaround for an llvm bug, and hopefully
> it'll soon go away.
Do you know more than me?

The 'bug' is actually a missing feature and I don't see someone working
on this. I tried fixing it myself but it will take me a while until
understand how to use llvm's tablegen syntax to describe the generation
of a series of instructions for the compiler.

Regards
Robert

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