Do not use atomic reads on platforms without atomic support in LLVM. Fixes #441.#442

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Amanieu merged 2 commits intorust-lang:masterfrom

cr1901:no-atomic

Nov 28, 2021

Commits on Nov 27, 2021

Do not use atomic reads on platforms without atomic support in LLVM.
cr1901
committed

Commits on Nov 28, 2021

Use fully-qualified syntax for abs_diff to avoid warning, which can trigger a compiler error.
cr1901
committed