[llvm-dev] Out-of-line atomics implementation ways

[Pavel Iliin via llvm-dev]

Thank you for useful advice,
Outline atomics are implemented in two patches:
https://reviews.llvm.org/D91156 - compiler-rt part
https://reviews.llvm.org/D91157 - llvm+clang part
I’ve tested it on aarch64+lse linux board (libc++ and libstdc++) and
checked compilation of Chromium and AOSP hacked build with updated libgcc supporting outline atomics helpers
(to do fully Android testing libgcc should be updated to version 10 or replaced by compiler-rt with my patch above)
I would be very grateful for review and comments,
Pavel
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