1 files changed, 17 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/ms-intrinsics.cpp b/clang/test/CodeGenCXX/ms-intrinsics.cpp
new file mode 100644
index 00000000000..7afa39a97ee
--- /dev/null
+++ b/clang/test/CodeGenCXX/ms-intrinsics.cpp
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -fms-compatibility -fsyntax-only %s -verify
+// expected-no-diagnostics
+
+struct S {
+  mutable long _Spinlock = 0;
+  void _Unlock() {
+    __iso_volatile_store32(&_Spinlock, 0);
+  }
+  int _Reset() {
+    long v = __iso_volatile_load32(&_Spinlock);
+    __iso_volatile_store32(&_Spinlock, 0);
+    return v;
+  }
+};
+
+S s;
+