1 files changed, 11 insertions, 0 deletions
diff --git a/clang/test/CodeGen/ms-intrinsics.c b/clang/test/CodeGen/ms-intrinsics.c
index 2d4ca5c272a..06d85890128 100644
--- a/clang/test/CodeGen/ms-intrinsics.c
+++ b/clang/test/CodeGen/ms-intrinsics.c
@@ -434,6 +434,17 @@ __int64 test_InterlockedDecrement64(__int64 volatile *Addend) {
 
 #endif
 
+unsigned char test_interlockedbittestandset(volatile long *ptr, long bit) {
+  return _interlockedbittestandset(ptr, bit);
+}
+// CHECK-LABEL: define{{.*}} i8 @test_interlockedbittestandset
+// CHECK: %0 = shl i32 1, %bit
+// CHECK: %1 = atomicrmw or i32* %ptr, i32 %0 seq_cst
+// CHECK: %2 = lshr i32 %1, %bit
+// CHECK: %3 = trunc i32 %2 to i8
+// CHECK: %4 = and i8 %3, 1
+// CHECK: ret i8 %4
+
 void test__fastfail() {
   __fastfail(42);
 }