[PATCH] D141189: [Mips] Set setMaxAtomicSizeInBitsSupported

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> Wouldn't it be more correct to set atomic widths to 0 and generate __atomic_* calls?

You need some sort of operating-system level magic to make atomicrmw/cmpxchg work without ll/sc.  Disabling interrupts, or a restartable sequence, or something along those lines.  Most of the ways you'd  implement that end up being compatible with lowering atomic load/store to plain load/store operations.  Granted, other implementations are possible.


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https://reviews.llvm.org/D141189