src/test/assembly/asm/aarch64-outline-atomics.rs

   1 // min-llvm-version: 12.0
   2 // assembly-output: emit-asm
   3 // compile-flags: -O
   4 // compile-flags: --target aarch64-unknown-linux-gnu
   5 // needs-llvm-components: aarch64
   6 // only-aarch64
   7 // only-linux
   8
   9 #![crate_type = "rlib"]
  10
  11 use std::sync::atomic::{AtomicI32, Ordering::*};
  12
  13 pub fn compare_exchange(a: &AtomicI32) {
  14     // On AArch64 LLVM should outline atomic operations.
  15     // CHECK: __aarch64_cas4_relax
  16     let _ = a.compare_exchange(0, 10, Relaxed, Relaxed);
  17 }