From ba078648fb90dcd326c175caba1caef290de749a Mon Sep 17 00:00:00 2001
From: Andy Wang <cbeuw.andy@gmail.com>
Date: Tue, 17 May 2022 21:11:37 +0100
Subject: [PATCH] Add spin loop hints for Miri

---
 crossbeam-deque/tests/injector.rs | 4 ++++
 crossbeam-deque/tests/lifo.rs     | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/crossbeam-deque/tests/injector.rs b/crossbeam-deque/tests/injector.rs
index 478f7ee87..f706a8d9c 100644
--- a/crossbeam-deque/tests/injector.rs
+++ b/crossbeam-deque/tests/injector.rs
@@ -61,6 +61,8 @@ fn spsc() {
                         assert_eq!(i, v);
                         break;
                     }
+                    #[cfg(miri)]
+                    std::hint::spin_loop();
                 }
             }
 
@@ -102,6 +104,8 @@ fn mpmc() {
                             v[n].fetch_add(1, SeqCst);
                             break;
                         }
+                        #[cfg(miri)]
+                        std::hint::spin_loop();
                     }
                 }
             });
diff --git a/crossbeam-deque/tests/lifo.rs b/crossbeam-deque/tests/lifo.rs
index ce04c6159..c1a65cd2e 100644
--- a/crossbeam-deque/tests/lifo.rs
+++ b/crossbeam-deque/tests/lifo.rs
@@ -87,6 +87,8 @@ fn spsc() {
                         assert_eq!(i, v);
                         break;
                     }
+                    #[cfg(miri)]
+                    std::hint::spin_loop();
                 }
             }