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1 | // Copyright 2016 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
11 | // compile-flags: -C no-prepopulate-passes | |
12 | ||
13 | #![crate_type = "lib"] | |
54a0048b | 14 | #![feature(rustc_attrs)] |
7453a54e SL |
15 | |
16 | struct SomeUniqueName; | |
17 | ||
18 | impl Drop for SomeUniqueName { | |
19 | fn drop(&mut self) { | |
20 | } | |
21 | } | |
22 | ||
23 | pub fn possibly_unwinding() { | |
24 | } | |
25 | ||
26 | // CHECK-LABEL: @droppy | |
27 | #[no_mangle] | |
54a0048b | 28 | #[rustc_no_mir] // FIXME #27840 MIR has different codegen. |
7453a54e SL |
29 | pub fn droppy() { |
30 | // Check that there are exactly 6 drop calls. The cleanups for the unwinding should be reused, so | |
31 | // that's one new drop call per call to possibly_unwinding(), and finally 3 drop calls for the | |
32 | // regular function exit. We used to have problems with quadratic growths of drop calls in such | |
33 | // functions. | |
34 | // CHECK: call{{.*}}SomeUniqueName{{.*}}drop | |
35 | // CHECK: call{{.*}}SomeUniqueName{{.*}}drop | |
36 | // CHECK: call{{.*}}SomeUniqueName{{.*}}drop | |
37 | // CHECK: call{{.*}}SomeUniqueName{{.*}}drop | |
38 | // CHECK: call{{.*}}SomeUniqueName{{.*}}drop | |
39 | // CHECK: call{{.*}}SomeUniqueName{{.*}}drop | |
40 | // CHECK-NOT: call{{.*}}SomeUniqueName{{.*}}drop | |
41 | // The next line checks for the } that ends the function definition | |
42 | // CHECK-LABEL: {{^[}]}} | |
43 | let _s = SomeUniqueName; | |
44 | possibly_unwinding(); | |
45 | let _s = SomeUniqueName; | |
46 | possibly_unwinding(); | |
47 | let _s = SomeUniqueName; | |
48 | possibly_unwinding(); | |
49 | } |