1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
//@ needs-unwind - this test verifies the amount of drop calls when unwinding is used
//@ compile-flags: -C no-prepopulate-passes
#![crate_type = "lib"]
struct SomeUniqueName;
impl Drop for SomeUniqueName {
#[inline(never)]
fn drop(&mut self) {}
}
#[inline(never)]
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.
// FIXME(eddyb) the `void @` forces a match on the instruction, instead of the
// comment, that's `; call core::ptr::drop_in_place::<drop::SomeUniqueName>`
// for the `v0` mangling, should switch to matching on that once `legacy` is gone.
// CHECK-COUNT-6: {{(call|invoke) void @.*}}drop_in_place{{.*}}SomeUniqueName
// CHECK-NOT: {{(call|invoke) void @.*}}drop_in_place{{.*}}SomeUniqueName
// 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();
}
|
