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| author | Yuki Okushi <jtitor@2k36.org> | 2022-07-18 08:39:57 +0900 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-07-18 08:39:57 +0900 |
| commit | 796bc7cae364b39ff7e5139842b51dd9b764060d (patch) | |
| tree | ce79b2e9250d96491caa4a01bf0b217d60a234a4 /compiler/rustc_mir_transform/src | |
| parent | 263edd43c5255084292329423c61a9d69715ebfa (diff) | |
| parent | a898f413795d923d1a025517458fa0fd2d7291ac (diff) | |
| download | rust-796bc7cae364b39ff7e5139842b51dd9b764060d.tar.gz rust-796bc7cae364b39ff7e5139842b51dd9b764060d.zip | |
Rollup merge of #98383 - m-ou-se:remove-memory-order-restrictions, r=joshtriplett
Remove restrictions on compare-exchange memory ordering. We currently don't allow the failure memory ordering of compare-exchange operations to be stronger than the success ordering, as was the case in C++11 when its memory model was copied to Rust. However, this restriction was lifted in C++17 as part of [p0418r2](https://wg21.link/p0418r2). It's time we lift the restriction too. | Success | Failure | Before | After | |---------|---------|--------|-------| | Relaxed | Relaxed | :heavy_check_mark: | :heavy_check_mark: | | Relaxed | Acquire | :x: | :heavy_check_mark: | | Relaxed | SeqCst | :x: | :heavy_check_mark: | | Acquire | Relaxed | :heavy_check_mark: | :heavy_check_mark: | | Acquire | Acquire | :heavy_check_mark: | :heavy_check_mark: | | Acquire | SeqCst | :x: | :heavy_check_mark: | | Release | Relaxed | :heavy_check_mark: | :heavy_check_mark: | | Release | Acquire | :x: | :heavy_check_mark: | | Release | SeqCst | :x: | :heavy_check_mark: | | AcqRel | Relaxed | :heavy_check_mark: | :heavy_check_mark: | | AcqRel | Acquire | :heavy_check_mark: | :heavy_check_mark: | | AcqRel | SeqCst | :x: | :heavy_check_mark: | | SeqCst | Relaxed | :heavy_check_mark: | :heavy_check_mark: | | SeqCst | Acquire | :heavy_check_mark: | :heavy_check_mark: | | SeqCst | SeqCst | :heavy_check_mark: | :heavy_check_mark: | | \* | Release | :x: | :x: | | \* | AcqRel | :x: | :x: | Fixes https://github.com/rust-lang/rust/issues/68464
Diffstat (limited to 'compiler/rustc_mir_transform/src')
0 files changed, 0 insertions, 0 deletions