jakehehrlich added a comment.
This is causing breaks in fuchsia,
Code that looks like this
uintptr_t last_unlogged =
atomic_load_explicit(&unlogged_tail, memory_order_acquire);
do {
if (last_unlogged == 0)
return;
} while (!atomic_compare_exchange_weak_explicit(&unlogged_tail,
&last_unlogged, 0,
memory_order_acq_rel,
memory_order_relaxed));
Where unlogged_tail is somewhere on the stack. And
'atomic_compare_exchange_weak_explicit' is an #define alias for
'__c11_atomic_compare_exchange_weak'
Full context here:
https://fuchsia.googlesource.com/zircon/+/master/third_party/ulib/musl/ldso/dynlink.c#822
Repository:
rL LLVM
https://reviews.llvm.org/D47229
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