Cherry-pick #4959 (aarch64 atomic_cas fix) to 1.0.0 release branch. #4960
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This PR cherry-picks #4959's fix onto the 1.0.0 release branch in order to facilitate a point-release. The bug affects
atomic_cas
usage on aarch64. This is not reachable from Wasmtime in the default configuration, but may affect other users of Cranelift (e.g.cg_clif
) and any uses of Wasmtime with the atomic-operation extensions enabled.