1 files changed, 47 insertions, 0 deletions
diff --git a/src/test/codegen/drop.rs b/src/test/codegen/drop.rs
new file mode 100644
index 00000000000..2ac8de6d802
--- /dev/null
+++ b/src/test/codegen/drop.rs
@@ -0,0 +1,47 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -C no-prepopulate-passes
+
+#![crate_type = "lib"]
+
+struct SomeUniqueName;
+
+impl Drop for SomeUniqueName {
+    fn drop(&mut self) {
+    }
+}
+
+pub fn possibly_unwinding() {
+}
+
+// CHECK-LABEL: @droppy
+#[no_mangle]
+pub fn droppy() {
+// Check that there are exactly 6 drop calls. The cleanups for the unwinding should be reused, so
+// that's one new drop call per call to possibly_unwinding(), and finally 3 drop calls for the
+// regular function exit. We used to have problems with quadratic growths of drop calls in such
+// functions.
+// CHECK: call{{.*}}SomeUniqueName{{.*}}drop
+// CHECK: call{{.*}}SomeUniqueName{{.*}}drop
+// CHECK: call{{.*}}SomeUniqueName{{.*}}drop
+// CHECK: call{{.*}}SomeUniqueName{{.*}}drop
+// CHECK: call{{.*}}SomeUniqueName{{.*}}drop
+// CHECK: call{{.*}}SomeUniqueName{{.*}}drop
+// CHECK-NOT: call{{.*}}SomeUniqueName{{.*}}drop
+// The next line checks for the } that ends the function definition
+// CHECK-LABEL: {{^[}]}}
+    let _s = SomeUniqueName;
+    possibly_unwinding();
+    let _s = SomeUniqueName;
+    possibly_unwinding();
+    let _s = SomeUniqueName;
+    possibly_unwinding();
+}