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third_party_rust_rust/compiler/rustc_session
Michal Rostecki 1cd7dbfbf8 Add target_has_atomic* symbols if any atomic width is supported
Atomic operations for different widths (8-bit, 16-bit, 32-bit etc.) are
guarded by `target_has_atomic = "value"` symbol (i.e. `target_has_atomic
= "8"`) (and the other derivatives), but before this change, there was
no width-agnostic symbol indicating a general availability of atomic
operations.

This change introduces:

* `target_has_atomic_load_store` symbol when atomics for any integer
  width are supported by the target.
* `target_has_atomic` symbol when also CAS is supported.

Fixes #106845

Signed-off-by: Michal Rostecki <vadorovsky@gmail.com>
2023-01-25 10:44:03 +08:00
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