Auto merge of #74468 - Manishearth:rollup-5nhvz80, r=Manishearth

Rollup of 11 pull requests

Successful merges:

 - #72414 ( Add lazy initialization primitives to std)
 - #74069 (Compare tagged/niche-filling layout and pick the best one)
 - #74418 (ci: Set `shell: bash` as a default, remove duplicates)
 - #74441 (bootstrap.py: patch RPATH on NixOS to handle the new zlib dependency.)
 - #74444 (Add regression test for #69414)
 - #74448 (improper_ctypes_definitions: allow `Box`)
 - #74449 (Test codegen of compare_exchange operations)
 - #74450 (Fix `Safety` docs for `from_raw_parts_mut`)
 - #74453 (Use intra-doc links in `str` and `BTreeSet`)
 - #74457 (rustbuild: drop tool::should_install)
 - #74464 (Use pathdiff crate)

Failed merges:

r? @ghost

1 files changed, 60 insertions, 0 deletions

diff --git a/src/test/codegen/atomic-operations.rs b/src/test/codegen/atomic-operations.rs
new file mode 100644
index 00000000000..ff94ac8543f
--- /dev/null
+++ b/src/test/codegen/atomic-operations.rs
@@ -0,0 +1,60 @@
+// Code generation of atomic operations.
+//
+// compile-flags: -O
+#![crate_type = "lib"]
+
+use std::sync::atomic::{AtomicI32, Ordering::*};
+
+// CHECK-LABEL: @compare_exchange
+#[no_mangle]
+pub fn compare_exchange(a: &AtomicI32) {
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 10 monotonic monotonic
+    let _ = a.compare_exchange(0, 10, Relaxed, Relaxed);
+
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 20 release monotonic
+    let _ = a.compare_exchange(0, 20, Release, Relaxed);
+
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 30 acquire monotonic
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 31 acquire acquire
+    let _ = a.compare_exchange(0, 30, Acquire, Relaxed);
+    let _ = a.compare_exchange(0, 31, Acquire, Acquire);
+
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 40 acq_rel monotonic
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 41 acq_rel acquire
+    let _ = a.compare_exchange(0, 40, AcqRel, Relaxed);
+    let _ = a.compare_exchange(0, 41, AcqRel, Acquire);
+
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 50 seq_cst monotonic
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 51 seq_cst acquire
+    // CHECK: cmpxchg i32* %{{.*}}, i32 0, i32 52 seq_cst seq_cst
+    let _ = a.compare_exchange(0, 50, SeqCst, Relaxed);
+    let _ = a.compare_exchange(0, 51, SeqCst, Acquire);
+    let _ = a.compare_exchange(0, 52, SeqCst, SeqCst);
+}
+
+// CHECK-LABEL: @compare_exchange_weak
+#[no_mangle]
+pub fn compare_exchange_weak(w: &AtomicI32) {
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 10 monotonic monotonic
+    let _ = w.compare_exchange_weak(1, 10, Relaxed, Relaxed);
+
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 20 release monotonic
+    let _ = w.compare_exchange_weak(1, 20, Release, Relaxed);
+
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 30 acquire monotonic
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 31 acquire acquire
+    let _ = w.compare_exchange_weak(1, 30, Acquire, Relaxed);
+    let _ = w.compare_exchange_weak(1, 31, Acquire, Acquire);
+
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 40 acq_rel monotonic
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 41 acq_rel acquire
+    let _ = w.compare_exchange_weak(1, 40, AcqRel, Relaxed);
+    let _ = w.compare_exchange_weak(1, 41, AcqRel, Acquire);
+
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 50 seq_cst monotonic
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 51 seq_cst acquire
+    // CHECK: cmpxchg weak i32* %{{.*}}, i32 1, i32 52 seq_cst seq_cst
+    let _ = w.compare_exchange_weak(1, 50, SeqCst, Relaxed);
+    let _ = w.compare_exchange_weak(1, 51, SeqCst, Acquire);
+    let _ = w.compare_exchange_weak(1, 52, SeqCst, SeqCst);
+}