src/test/codegen/atomic-operations.rs

   1 // Code generation of atomic operations.
   2 //
   3 // compile-flags: -O
   4 #![crate_type = "lib"]
   5
   6 use std::sync::atomic::{AtomicI32, Ordering::*};
   7
   8 // CHECK-LABEL: @compare_exchange
   9 #[no_mangle]
  10 pub fn compare_exchange(a: &AtomicI32) {
  11     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 10 monotonic monotonic
  12     let _ = a.compare_exchange(0, 10, Relaxed, Relaxed);
  13
  14     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 20 release monotonic
  15     let _ = a.compare_exchange(0, 20, Release, Relaxed);
  16
  17     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 30 acquire monotonic
  18     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 31 acquire acquire
  19     let _ = a.compare_exchange(0, 30, Acquire, Relaxed);
  20     let _ = a.compare_exchange(0, 31, Acquire, Acquire);
  21
  22     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 40 acq_rel monotonic
  23     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 41 acq_rel acquire
  24     let _ = a.compare_exchange(0, 40, AcqRel, Relaxed);
  25     let _ = a.compare_exchange(0, 41, AcqRel, Acquire);
  26
  27     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 50 seq_cst monotonic
  28     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 51 seq_cst acquire
  29     // CHECK: cmpxchg {{i32\*|ptr}} %{{.*}}, i32 0, i32 52 seq_cst seq_cst
  30     let _ = a.compare_exchange(0, 50, SeqCst, Relaxed);
  31     let _ = a.compare_exchange(0, 51, SeqCst, Acquire);
  32     let _ = a.compare_exchange(0, 52, SeqCst, SeqCst);
  33 }
  34
  35 // CHECK-LABEL: @compare_exchange_weak
  36 #[no_mangle]
  37 pub fn compare_exchange_weak(w: &AtomicI32) {
  38     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 10 monotonic monotonic
  39     let _ = w.compare_exchange_weak(1, 10, Relaxed, Relaxed);
  40
  41     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 20 release monotonic
  42     let _ = w.compare_exchange_weak(1, 20, Release, Relaxed);
  43
  44     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 30 acquire monotonic
  45     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 31 acquire acquire
  46     let _ = w.compare_exchange_weak(1, 30, Acquire, Relaxed);
  47     let _ = w.compare_exchange_weak(1, 31, Acquire, Acquire);
  48
  49     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 40 acq_rel monotonic
  50     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 41 acq_rel acquire
  51     let _ = w.compare_exchange_weak(1, 40, AcqRel, Relaxed);
  52     let _ = w.compare_exchange_weak(1, 41, AcqRel, Acquire);
  53
  54     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 50 seq_cst monotonic
  55     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 51 seq_cst acquire
  56     // CHECK: cmpxchg weak {{i32\*|ptr}} %{{.*}}, i32 1, i32 52 seq_cst seq_cst
  57     let _ = w.compare_exchange_weak(1, 50, SeqCst, Relaxed);
  58     let _ = w.compare_exchange_weak(1, 51, SeqCst, Acquire);
  59     let _ = w.compare_exchange_weak(1, 52, SeqCst, SeqCst);
  60 }