src/test/codegen/noalias-rwlockreadguard.rs

   1 // compile-flags: -O -C no-prepopulate-passes -Z mutable-noalias=yes
   2
   3 #![crate_type = "lib"]
   4
   5 use std::sync::{RwLock, RwLockReadGuard};
   6
   7 // Make sure that `RwLockReadGuard` does not get a `noalias` attribute, because
   8 // the `RwLock` might alias writes after it is dropped.
   9
  10 // CHECK-LABEL: @maybe_aliased(
  11 // CHECK-NOT: noalias
  12 // CHECK-SAME: %_data
  13 #[no_mangle]
  14 pub unsafe fn maybe_aliased(_: RwLockReadGuard<'_, i32>, _data: &RwLock<i32>) {}