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Rollup merge of #76965 - fusion-engineering-forks:fix-atomic-from-mut, r=Amanieu

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Add cfg(target_has_atomic_equal_alignment) and use it for Atomic::from_mut.

Fixes some platform-specific problems with #74532 by using the actual alignment of the types instead of hardcoding a few `target_arch`s.

r? @RalfJung
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Dylan DPC 2020-09-23 14:54:04 +02:00 • committed by GitHub
commit eaaf5d7e38
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8 changed files with 272 additions and 5 deletions
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compiler/rustc_span/src/symbol.rs
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@ -1071,6 +1071,7 @@ symbols! {
target_feature,
target_feature_11,
target_has_atomic,
target_has_atomic_equal_alignment,
target_has_atomic_load_store,
target_os,
target_pointer_width,