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Add cfg(target_has_atomic_equal_alignment) and use it for Atomic::from_mut. #76965

Merged
merged 8 commits into from
Sep 24, 2020
Merged

Add cfg(target_has_atomic_equal_alignment) and use it for Atomic::from_mut. #76965

merged 8 commits into from
Sep 24, 2020

Commits on Sep 21, 2020

  1. Add cfg(target_has_atomic_equal_alignment). 

    This is needed for Atomic::from_mut.
    @m-ou-se
    m-ou-se committed Sep 21, 2020
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  2. Don't unwrap but report a fatal error for TargetDataLayout::parse.

    @m-ou-se
    m-ou-se committed Sep 21, 2020
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  3. Add feature gate ui test for cfg(target_has_atomic_load_store).

    @m-ou-se
    m-ou-se committed Sep 21, 2020
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  4. Add feature gate ui test for cfg(target_has_atomic_equal_alignment).

    @m-ou-se
    m-ou-se committed Sep 21, 2020
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  5. Revert "Revert adding Atomic::from_mut." 

    This reverts commit 5ef1db3.
    @m-ou-se
    m-ou-se committed Sep 21, 2020
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  6. Gate Atomic::from_mut on cfg(target_has_atomic_equal_alignment). 

    Instead of a few hardcoded cfg(target_arch = ..) like before.
    @m-ou-se
    m-ou-se committed Sep 21, 2020
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  7. Move use align_of in atomic.rs into the places where it is used.

    @m-ou-se
    m-ou-se committed Sep 21, 2020
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  8. Test that AtomicU64::from_mut is not available on x86 linux.

    @m-ou-se
    m-ou-se committed Sep 21, 2020
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