mirror of https://github.com/rust-lang/rust
39 lines
1.3 KiB
Rust
39 lines
1.3 KiB
Rust
//@ needs-unwind - this test verifies the amount of drop calls when unwinding is used
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//@ compile-flags: -C no-prepopulate-passes
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#![crate_type = "lib"]
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struct SomeUniqueName;
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impl Drop for SomeUniqueName {
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#[inline(never)]
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fn drop(&mut self) {
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}
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}
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#[inline(never)]
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pub fn possibly_unwinding() {
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}
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// CHECK-LABEL: @droppy
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#[no_mangle]
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pub fn droppy() {
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// Check that there are exactly 6 drop calls. The cleanups for the unwinding should be reused, so
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// that's one new drop call per call to possibly_unwinding(), and finally 3 drop calls for the
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// regular function exit. We used to have problems with quadratic growths of drop calls in such
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// functions.
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// FIXME(eddyb) the `void @` forces a match on the instruction, instead of the
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// comment, that's `; call core::ptr::drop_in_place::<drop::SomeUniqueName>`
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// for the `v0` mangling, should switch to matching on that once `legacy` is gone.
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// CHECK-COUNT-6: {{(call|invoke) void @.*}}drop_in_place{{.*}}SomeUniqueName
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// CHECK-NOT: {{(call|invoke) void @.*}}drop_in_place{{.*}}SomeUniqueName
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// The next line checks for the } that ends the function definition
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// CHECK-LABEL: {{^[}]}}
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let _s = SomeUniqueName;
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possibly_unwinding();
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let _s = SomeUniqueName;
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possibly_unwinding();
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let _s = SomeUniqueName;
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possibly_unwinding();
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}
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